The invention concerns the use of zeolite adsorbent materials in agglomerate form comprising at least one zeolite of type A for gas phase separation in particular the separation of carbon dioxide (CO2) from Natural gas (GN) in pressure modulated methods and/or in temperature modulated methods. The invention also con...

The present invention relates to a halogen free fire retardant thermoplastic composition characterized in that it consists of:  50% to 70% by weight of fire retardant fillers  0.1% to 45% by weight of a copolymer of ethylene and of an ethylenic monomer bearing a polar function  10% to 25% by weight of a non function...

The invention relates to a composition based on 3,3,3-trifluoropropene and ammonia, and to the use thereof, especially as a heat transfer fluid.

The invention relates to a multilayerfilm of A/B/C structure comprising: - a first layer of composition A comprising a fluoropolymer; - a second layer of composition B comprising a filled fluoropolymer; and - a third layer of composition C comprising a fluoropolymer, characterized in that the first and third lay...

The present invention relates to a composition comprising a fluoropolymer and two white inorganic fillers said composition being intended for the manufacture of thin monolayer films which are opaque to visible light and to UV rays and which can be used in particular in the field of photovoltaic cells. This compositi...

The invention relates to a method for producing a fibrous material comprising carbon fibres or glass fibres or plant fibres or polymer-based fibres, that are used alone or in a mixture, and are impregnated by a thermohardenable polymer or a mixture of thermohardenable polymers, using a mixture containing a hardene...

The invention relates to a block copolymer derived from at least one ethylene oxide and/or propylene oxide monomer containing 14c. The present invention also relates to a method for preparing such a block copolymer.

The invention relates to a method for producing a (meth)acrylic ester with improved productivity by transesterification of a light alkyl (meth)acrylate with a heavy alcohol. The method of the invention includes the recycling of noble products recovered after the thermal treatment of heavy fractions generated during ...

The present invention concerns the use of at least one sulphonic acid for recovering glycerol from a reaction crude for the transesterification of glycerides in particular triglycerides of plant and/or animal origin. The invention also concerns a method for purifying the glycerol obtained as a by product of triglyce...

The invention relates to a method for synthesising polyaryletherketones having low residue content either being residual monomers or solvents from the synthesis method.

Pesticidal treatment of stored foodstuffs and silos, characterized in that there is applied by nebulization at least one volatile sulphur compound of general formula: in which R and R" represent an alkyl or alkenyl radical containing from 1 to 4 carbon atoms

The invention relates to a process for preparation of F133a. This process consists in placing 1,1,1-trifluoro-2-chloroethane (F133a) in contact with chlorine in the presence of hydrogen fluoride and a fluorination catalyst. F133a may be obtained by fluorination of trichloroethylene, and the F123 may be subsequently...

The present invention relates to a photocatalytic film including at least one polymer layer (1) including at least one photocatalyst, said layer being pervious to both the vapours of at least one fiimigating compound and ultraviolet radiation capable of activating the photocatalyst. The present invention also rel...

1. Process for manufacturing a fibrous substrate in which the fibrous substrate comprises an assembly of one or more continuous fibres such as fabrics, or an assembly of short fibres such as felts and nonwovens that may be in the form of strips, laps, braids, locks or pieces, characterized in that it comprises: imp...

46s54 222The invention concerns a polyester resin having a linear or branched structure and free of unsaturated fatty acids which is hydroxylated or carboxylated and characterised in that it is made from: a) an acid component comprising: a1) at least one C to C carboxylic polyacid or anhydride a2) at least one C to ...

THE INVENTION RELATES TO A PROCESS FOR THE SYNTHESIS OF C11 AND C12 O-AMINO­ALKANOIC ACID ESTERS COMPRISING A STEP OF CONTINUOUS NITRILATION IN THE GAS PHASE OR IN A MIXED GAS-LIQUID PHASE, A STEP OF METATHESIS AND A STEP OF REDUCTION BY HYDROGENATION, USING, AS RAW MATERIAL, C10 AND C11 O-ALKENOIC ACID ESTERS. ...

The present invention relates to a polymeric composition composed of a fluoropolymer and of zinc oxide (ZnO) of nanometric size which is intended for the manufacture of films transparent in the visible region and opaque to UV radiation. More particularly, in the composition according to the invention, the said fille...

The present invention relates to a method for producing L methionine using a bio synthesis process and a specific enzymatic process. More particularly the present invention relates to a method for producing L methionine with high yield by enzyme conversion reaction from L methionine precursor in the presence of meth...

The invention relates to a method for preparing acrylic acid from propylcne, consisting of a first step comprising the oxidation of propylene to acrolein and a second step comprising the oxidation of acrolein to acrylic acid, including a glycerol dehydration step performed in the presence of a gas containing proplye...

1. A process for the synthesis of an ω-amino acid (ester) of formula ROOC- (CH2) q-CH2NH2, in which R is H or an alkyl radical comprising from. 1 to 4 carbon atoms and q is an integral index of between 2 and 13, starting from a monounsaturated fatty acid (ester) of formula R1-CH=CH- (CH2) p-COOR2, in which R1 is H o...

The invention relates to a method for producing L methionine by carrying out an enzyme reaction between an L methionine precursor dimethyl disulfide (DMDS) and hydrogen.

Process for the preparation of polyamide-12 powder by anionic polymerization of lauryllactam in solution in a solvent of the said lactam, the polyamide-12 powder being insoluble in this solvent, the said polymerization being carried out: in the presence of a catalyst and of an activator; in the presence of a fine...

The present invention concerns a composition made from poly(arylene ether ketone) (PAEK) characterised in that it comprises an organometallic phosphate salt or a mixture of organometallic phosphate salts.

The invention relates to a solvent composition comprising a mixture of at least one molecule having at least one sulphoxide function and at least one molecule having at least one amide function wherein the nitrogen atom supports a hydrogen atom. The invention also relates to the use of a solvent composition in order...

The présent invention relates to the use of a polymer from the polymérisation of 2-octyl acrylate of renewable origin and optionally at least one other monomer, as a binding agent in or for the production of a coating composition.

The present invention relates to an adsorbent article with reduced attrition due to immobility of its components said article comprising zeolitic particles of at least one zeolitic adsorbent said particles being immobilized with at least one resin wherein the average particle size of the at least one zeolitic adsorb...

The present invention concerns the use, in a method for the in-situ activation of at least one hydrotreating catalyst, in particular a hydrocracking catalyst, of at least one nitrogen compound having at least one of the following characteristics: a) a nitrogen weight content of between 15 and 35% by weight, relative...

The invention relates to a fatty diamide containing or consisting of a reaction material obtained from: a) at least one cycloaliphatic diamine containing a cycle of 6 carbon atoms; b) a fatty acid hydroxyl from among 12-hydroxystearic acid (12-HSA), 9-hydroxystearic acid (9-HSA), 10-hydroxystearic acid (10-HAS), 14-...

The invention relates to a fatty amide consisting of: a) a diamine selected from among aromatic cycloaliphatic or straight aliphatic diamines of C to C; b) a lactame or amino acid from C to C; c) optionally a second primary diamine different from said diamine a}; d) a hydroxylated fatty monoacid; and e) optionally a...

The invention concerns a fatty amide based hydrogelling additive produced from the addition reaction of a fatty acid RCOH on caprolatam which product carries a terminal carboxylic function in the form of an acid or in the form salified by a neutralizing agent and consisting of or comprising the mixture of three diff...

The invention concerns a fatty amide-based gelling additive produced by the reaction of a fatty amine R1NH2 on caprolactam with an amine terminal function, the amine being in the amine or salified form, and consisting of or comprising the mixture of three different amide compounds and resulting from the reaction wit...

The present invention relates to an impregnation process for a fibrous substrate a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. In particular the present inv...

The present invention concerns a method of synthesising a product of formula Br (CH2)n R by hydrobromination by reacting:  a reagent of formula (I) R1 CH=CH R2 in which R1 R2 identical or different are chosen from H or an alkyl radical comprising 1 to 30 carbon atoms saturated or unsaturated linear or branched funct...

The invention relates to to the use of peroxide(s) for cross linking at least one polymer said polymer consisting of a homopolymer or copolymer of ethylene and especially the ethylene vinyl acetate copolymer (EVA) or a mixture of the EVA with another homopolymer or copolymer of ethylene and at least one peroxide cha...

The present invention relates to a polymer composition said polymer having a main chain consisting of a polylactic acid the main chain including a plurality of unsaturated acid anhydride grafts characterized in that said main chain also includes activating comonomer grafts. The invention also relates to a manufactur...

The invention relates to a method for preparing fluoropropenes of formula (I) CF3CF=CHR, where R is a hydrogen or fluorine atom from at least one compound of formula (la) CF3CF=CFR, where R has the same meaning as in formula (I), said method including the following steps: (i) hydrogenating at least one compound of f...

The invention relates to a method for preparing olefin fluorine compounds. Specifically, the invention relates to a method for producing a (hydro)fluoroolefin compound, including: (i) in an agitated reactor provided with at least one reactant inlet and at least one outlet, contacting, with potassium hydroxide in an ...

462854222b1b2b3The invention concerns a method for preparing a hydroxylated or carboxylated polyester resin that is linear or branched and free of unsaturated fatty acid said method comprising the reaction between an acid component a) and an alcohol component b) in which a) comprises a1) at least one C to C carboxyl...

The present invention relates to a process for the selective extraction of monoglycerides present in a fraction of fatty acid alkyl esters (FAAEs), comprising at least one stage of liquid-liquid extraction by means of a polar solvent (PS) comprising a light alcohol and optionally of a nonpolar solvent (NS) comp...

The present invention relates to nitrogenous associative molecules comprising at least one unit rendering them capable of associating with one another or with a filler, via noncovalent bonds, and comprising a function capable of reacting with a polymer containing unsaturations so as to form a covalent bond with...

The invention relates to a method for synthesising ω- amino-alkanoic acids or the esters thereof from mono-unstarated natural fatty acids comprising at least one step of forming the unsaturated diacid corresponding to the original fatty acid.

The invention relates to a method for synthesising 9-aminononanoic acid or the esters thereof from natural unsaturated fatty acids, comprising at least one step of metathesis of the natural fatty acid and an oxidation step by oxidative cleaving. Said synthetic method uses widely available renewable starting materia...

The invention relates to a method for producing dialkoxy alkanes by direct partial oxidation of a lower alcohol with a catalyst based on mixed oxide containing molybdenum and at least one other metal selected from the metals that can assume a trivalent oxidation state such as Fe, B1, AI, Cr, In, La, Sb, and/or a met...

The present invention relates to a composition comprising: from 33 to 40% by weight of at least one crosslinked polyolefin obtained from at least one product (A) comprising an unsaturated epoxide and from at least one product (B) comprising an unsaturated carboxylic acid anhydride from 3 to 10% by weight of at least...

The invention relates to a method for producing bioresourced propionic acid from glycerol. The invention also relates to a composition comprising more than 85 mass % of bioresourced propionic acid, and to the use of the propionic acid obtained from the method as a solvent, as a food preservative, for producing herbi...

Systems and methodologies are described that facilitate utilizing hybrid automatic repeat/request (HARQ) in system access communications. A HARQ entity is provided that manages a plurality of HARQ processes, which can typicality use new data indicators (NDI) to determine when received data is a new transmission or ...

The mixture of the invention contains, for 100 parts in weight of (A) + (B): (A) 10 to 90 parts in weight of at least one non-nanostructured olefinic thermoplastic polymer; (B) 90 to 10 parts in weight of a formulation of at least one elastomer having unsaturated double bonds and capable of reacting with a cross-lin...

The mixture of the invention contains, for 100 parts in weight: (A) 10 to 90 parts in weight of at least one copolymer grafted to polyamide blocks, said copolymer comprising a polyolefine trunk and at least 1.3 polyamide grafts on said trunk in average and having a nano-structured organisation, wherein said grafts a...

The invention relates to a composite materia] including nanotubes of a chemical element selected from the compounds of the elements of the columns IIIa, IVa and Va of the periodic table, dispersed in a polymer matrix including (a) at least one fluorinated homo- or copolymer and (b) at least one fluorinated homo- or ...

The invention relates to a method for the impregnation of continuous fibres that comprises coating said fibres with a polymer matrix containing: (a) at least one fluorinated polymer grafted with at least one carboxylic polar function and (b) optionally at least one fluorinated non-grafted polymer. The invention also...

The invention relates to a method for production of grafted polyethylene comprising the following steps: a) fermentation of primary renewable material with optional purification to give at least one alcohol chosen from ethanol or a mixture of alcohols containing ethanol, b) dehydration of the alcohol obtained to giv...

An aim of the present invention is to produce, from glycerol, a bioresourced acrylic acid, that is to say an acrylic acid essentially based on a carbon source of natural origin, meeting all the quality criteria of monomers customarily used as starting material in processes for polymerization of acrylic acid and of i...

The invention relates to a fatty acid amide which comprises at least one product of the reaction of a reaction mixture comprising: a) at least one amine selected from: a linear C2 to C12 aliphatic amine and/or a C6 to C18 cycloaliphatic amine and/or an aromatic amine, b) 14-hydroxyeicosanoic acid (14-HEA) in the abs...

The invention relates to an improved process for the preparation of alkoxyamines resulting from ß-phosphorated nitroxides corresponding to the formula (I): by reaction with a halogenated derivative in the presence of an organometallic system. This process consists in carrying out the reaction in a water-miscible or...

The present invention relates to a composite material obtained by in situ polymerization of a thermoplastic resin with a fibrous material. More particularly the present invention relates to a polymeric composite material obtained by in situ polymerization of a thermoplastic (meth) acrylic resin and a fibrous materia...

The present invention relates to a method for synthesising a w-amino acid compound having formula HOOC-R"- CH2NH2, where R is an alkyl radical comprising between 6 and 15 carbon atoms or an alkylene radical comprising between 6 and 15 carbon atoms and between 0 and 2 unsaturations. The method comprises the foliowi...

The present invention relates to a primary mixture intended for crosslinking polyethylene , comprising at least an initiator of free radicals chosen from organic peroxides , azo compounds or mixtures thereof characterised in that it consists of said free radical initiator and at least one crosslinking promoter chose...

The invention relates to the use of a multilayer polyamide film as a rear protective sheet in a photovoltaic module. The invention also relates to a photovoltaic module containing photovoltaic cells protected by an encapsulant a front protective layer and a rear protective layer wherein the rear protective layer is ...

The present invention relates to a process for the preparation of amphiphilic gradient copolymers by Controlled Radical Polymerization in the presence of a RAFT (Reversible Addition Fragmentation Transfer) agent. The copolymers of the invention exhibit low polydispersity indices and low viscosities in solution and a...

The present invention relates to a method of manufacturing carbon fibres from raw materials of renewable origin, comprising: a) synthesis of acrolein from glycerol of vegetable origin; b) ammoxidation of the acrolein to obtain acrylonitrile; c) polymerization of the acrylonitrile to a homopolymer-or copolymer of ...

The invention relates to a polyhydroxyalkanoic acid (PHA) composition  further including: (A) a core-shell elastomer compound; (B) and an olefin copolymer including an ethylenic monomer having an epoxy function. Said composition exhibits excellent impact properties  in particular to cold. The invention also relates ...

The present invention relates to an oil-based masterbatch containing carbon nanotubes, to a method for preparing same and to the use thereof for manufacturing an aqueous or organic viscoelastic fluid, intended for drilling in underground formations.

The present invention relates to a polymeric composition composed of a fluoropolymer and of zinc oxide (ZnO) of nanometric size which is intended for the manufacture of films transparent in the visible region and opaque to UV radiation. More particularly, in the composition according to the invention, the said fille...

The invention relates to a masterbatch consisting essentially of an ethylene copolymer (A) and at least one ethylene comonomer having at least one polar group an organic peroxide (B) and an anti oxidant (C) the organic peroxide (B) accounting for 0.2 to 100 parts by weight for 100 parts by weight of the copolymer (A...

The invention relates to binary compositions of 2 3 3 3-tetrafluoropropene and difluoromethane  and especially to the uses thereof as a heat transfer fluid in compression systems with exchangers operating in counterflow mode or in split flow mode with counterflow tendency. The invention also relates to a heat tran...

The present invention concerns a method for preparing an alkali metal sulphide, from at least one oxygenated alkali metal compound comprising at least one step a) consisting of reacting said oxygenated alkali compound(s) with at least one sulphur compound of formula (I): in which: - R represents a linear or branched...

The subject of the present invention is a process for preparing acrolein by dehydration of glycerol in the presence of a catalyst system based on iron phosphorus oxide containing, in addition, one or more elements chosen from alkali metals, alkaline-earth metals, Al, Si, B, Co, Cr, Ni, V, Zn, Zr, Sn, Sb, Ag, Cu, Nb,...

The invention relates to a method for cleaving unsaturated fatty chains. Said method includes an oxidative cleavage step wherein at least one fatty acid derivative comprising at least one unsaturation with hydrogen peroxide in the presence of an oxidative cleavage reaction activation catalyst and molecular oxygen ...

The present invention relates to the use of a composition comprising: a) at least one aliphatic polyamide having at least two units corresponding to the following general formula: X.Y in which: X.Y represents a unit obtained by polycondensation of:  -a diamine containing X carbon atoms and,- a dicarboxylic acid cont...

The invention relates to a polyester resin which is based on at least one fatty acid, has an oil length of zéro (0%) or of between 0 and 35%, has a weight ratio of oxidizable fatty acids (monoacids) relative to the overall fatty acids, of 0 or greater than 0 and ranging up to 1 and which is based on an acid compon...

The invention relates to a copolyamide comprising units resulting from the polycondensation reaction of the following precursors: terephthalic acid (a); an aliphatic diamine (b) comprising x carbon atoms x being an integer between 6 and 22 (b); and an amino carboxylic acid and/or a lactam (c) comprising a main chain...

22nThe invention concerns a method for producing polyamide from an amino ester of formula NH (CH) COOR in which R represents an alkyl group and n represents an integer ranging from 5 to 14 comprising: a first reaction step in the presence of water at a first temperature; followed by a second reaction step at ...

The present invention relates to the manufacture of a bioresourced acrylic acid of "polymer grade", this grade being defined by a minimal 14C content and by limiting thresholds for content of the impurities harmful to the polymerization processes, in particular total aldehydes, protoanemonin, maleic anhydride and no...

The invention relates to a process for aqueous suspension microsuspension emulsion or microemulsion polymerization of at least one halogenated in particular chlorinated monomer for example vinyl chloride alone or with one or more other vinyl monomers preferably less than 50% by weight of one or more other vinyl mono...

The present invention relates to an active material suitable for the production of an electrode in particular an electrode for a Li S battery. The active material according to the invention comprises carbon nanofillers homogeneously dispersed in the substance of a sulphur material the active material being obtainabl...

The invention relates to the use of compositions essentially containing 2 3 3 3-tetrafluoropropene  HFC-134a and HFC-32 in compression refrigeration systems comprising exchangers operating in counterflow mode.

The invention relates to a viscous liquid (meth)acrylic syrup comprising: a) a (meth)acrylic polymer; b) a (meth)acrylic monomer; and c) an initiator for starting the polymerisation of the (meth)acrylic monomer said initiator being in the form of a peroxide compound which is a liquid at temperatures of between 0° an...

The invention relates to a method for impregnating a fibrous substrate consisting of long fibres with a liquid (meth)acrylic mixture mainly containing methacrylic and/or acrylic components. The invention also relates to such a (meth)acrylic mixture and the composition thereof said (meth)acrylic mixture comprising a ...

The present application relates to a method for manufacturing tertiobutyl hydroperoxide that includes the following steps: a) fermenting renewable raw materials and optionally purifying the same to produce a mixture containing at least butanol; b) dehydrating the butanol into butane; c) converting the butane into is...

The invention relates to a viscous liquid (meth)acrylic syrup comprising: a) a (meth)acrylic polymer; b) a (meth)acrylic monomer; and c) an initiator for starting the polymerisation of the (meth)acrylic monomer said initiator being in the form of a peroxide compound which is a liquid at temperatures of between 0° an...

The invention relates to a device and to a method for continuously measuring the hydrogen sulfide concentration of an off gas by means of a detachable device suitable for being temporarily connected to equipment producing said off gas the method comprising a step of measuring the absorption of electromagnetic radiat...

The invention relates to a method for producing a composite material, that comprises : a- preparing a carbon nanotube-based master mixture according to a method that comprises: mixing the carbon nanotubes in the form of a powder and at least one thermoplastic and/or elastomer polymer matrix in the form of a powder, ...

The present invention relates to a flame retarded thermoplastic composition comprising a graft copolymer containing polyamide blocks and composed of a polyolefin backbone and on average at least one polyamide graft in which the grafts are attached to the backbone by the residues of an unsaturated monomer (X) having ...

The present invention relates to a coupling agent for a fire retardant thermoplastic composition including a maleic anhydride grafted polyethylene having a melting point higher than 115°C (Celsius) characterized in that it also includes an ethylene/acrylate/maleic anhydride terpolymer the proportion of said terpolym...

The present invention relates to a composition that consists of polypropylene and a polymer having a polyolefin core and polyamide grafts optionally with an EPDM and/or a functional additive. The invention also relates to a multilayer structure including a plurality of adjacent layers at least one of which consist...

The present invention relates to a thermoplastic powder composition with D50 lower than 100 µm, including: at least one block copolymer having a melting temperature lower than 180 °C; 15 to 50 wt% of at least one powdery filler having Mohs hardness lower than 6 and D50 lower than 20 µm; and 0.1 to 5% of a powdery fl...

The invention relates to a method for producing E 1 chloro 3 3 3 trifluoropropene comprising at least one step during which 1 1 3 3 tetrachloropropene reacts with anhydrous hydrofluoric acid in a liquid phase in the absence of a catalyst. The invention also relates to the steps of separation and purification of th...

The invention concerns a linear or branched polyurethane resin based on a polyester obtained from A) a hydroxylated fatty polyester with:  said polyester A) being the reaction product of a) an alcohol component with b) an acid component said acid component b) comprises b1) at least one fatty acid with said component...

The present invention relates to a multilayer composition comprising a surface layer comprising a thermoplastic polymer A and a substrate layer comprising a polymeric composite material based thermoplastic (meth)acrylic matrix and a fibrous material as reinforcement.The multilayer composition is suitable for mechani...

The present invention relates to a method for synthesizing bio-based pyridine and picolines, said method including at least the following steps: a first step involving subjecting a glycerol filler, created from the methanolysis of vegetable oils or animal fats, to a dehydration reaction leading to acrolein; a second...

The present invention relates to the manufacture of bioresourced acrolein and bioresourced acrylic acid from glycerol as starting material and more particularly comes within the scope of a process for the manufacture of acrolein and acrylic acid according to which the reaction for the dehydration of glycerol to give...

One subject of the invention is a process for recovering/purifying (meth)acrylic acid which does not use azeotropic solvent and is based on the use of two columns for purifying a reaction mixture comprising (meth)acrylic acid. The process according to the invention includes a dry vacuum pump condensation system whic...

1. A process for the manufadture of 11-amino- undecanoic acid from ll-bromoundecanoic acid, comprising the following stages: i) a stage of dispersion of molten or non-molten ll-bromoundecanoic acid in an aqueous ammonia solution, and ii) a stage of ammonolysis by reaction of ll-bromoundecanoic acid with excess a...

The invention concerns the use of a polymeric composition as an encapsulant in a photovoltaic module said polymeric composition comprising a copolymer that comprises an ethylene monomer and a carboxylic acid vinyl ester comonomer in particular an ethylene vinyl acetate copolymer and the polymeric composition having ...

The present invention relates to an encapsulant for a photovoltaic module intended to coat a photovoltaic cell comprising at least two adjacent thermoplastic layers forming a core skin assembly characterized in that:  the skin layer consists of a polyamide grafted polymer comprising a polyolefin backbone representin...

The present invention concerns the use for gas separation of at least one zeolite adsorbent material comprising at least one FAU zeolite said adsorbent having an external surface area greater than 20 m· g a non zeolite phase (PNZ) content such that 0 < PNZ = 30% and an Si/Al atomic ratio of between 1 and 2.5. The in...

The invention relates to the field of storing electrical energy in secondary lithium batteries of the Li ion type. More precisely the invention relates to an electrode material for a Li ion battery to the method for the production thereof and to the use of same in a Li ion battery. The invention also relates to Li i...

The present invention relates to a material comprising dendritic molecules each constituted of fragments that are at least bifunctional and of fragments that are at least trifunctional joined together by ester or thioester bridges, alone or in combination with amide or urea bridges, said bridges being formed from t...

The present invention relates to the manufacture of bioresourced acrolein and bioresourced acrylic acid from glycerol as starting material and more particularly comes within the scope of a process for the manufacture of acrolein and acrylic acid according to which the reaction for the dehydration of glycerol to give...

Transparent and impact-resistant crosslinked acrylic composition consisting of a brittle matrix (I) having a glass transition temperature of greater than 0°C and of elastomeric domains having a characteristic dimension of less than 100 nm consisting of macromolecular sequences (II) having a flexible nature with...

22The invention relates to a process for synthesizing a nitrile fatty acid (heminitrile) from unsaturated fatty acids in the form of an acid or a simple ester or a "complex" ester of triglyceride type which is first of all converted into an unsaturated fatty nitrile which is subjected to oxidative cleavage using HO ...

A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-l-propene comprising the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydro-fluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1...

The invention relates to the industrial production of highly pure 2 propylheptyl acrylate with a high yield according to a process by transesterification preferably in semi continuous mode. The process according to the invention uses ethyl titanate in solution in 2 propylheptanol or 2 propylheptyl titanate as transe...

THE INVENTION RELATES TO A CROSS-LINKING SYSTEM WHICH INCLUDES AT LEAST: ONE ORGANIC PEROXIDE HAVING A HALF-LIFE OF ONE HOUR AT ANY TEMPERATURE SELECTED IN THE RANGE FROM 80°C TO 115°C, AND A CROSS-LINKING COAGENT, THE HALF-LIFE OF SAID PEROXIDE BEING MEASURED BY DISSOLVING THE PEROXIDE IN N-DODECANE HAVING A CONCEN...

The plunger tube connector for a container for packaging a product particularly a chemical product comprises a body 18 provided with a through bore 26 for the passage of the plunger tube a gripping means 20 mounted on the body and provided with an opening 34 for the passage of said plunger tube and a compression rin...

The invention relates to an adhesive composition comprising, relative to its total weight: • from 1 to 40% of a polyethylene (A) grafted with a functional monomer or a blend of a polyethylene (Al) with a second polymer {A2) different from (Al), said blend of (Al) and (A2) being co-grafted with an unsaturated functi...

The invention concerns a liquid (meth)acrylic syrup for impregnating a fibrous substrate. The invention concerns in particular a viscous liquid syrup primarily containing methacrylic or acrylic components. The invention also concerns a method of producing this syrup. The invention further concerns a method of impreg...

The present invention relates to a method for the reactive grinding of castor seeds which, using specially processed castor seeds in the presence of a light alcohol and a basic catalyst, enables a grinding and a transesterification reaction of the triglycerides present in the castor oil to be performed in a single s...

The invention relates to a method for the selective extraction of runctionalised fatty acid esters from seeds of oleaginous plants, wherein said method includes : a) at least one step of extracting fatty acid esters that comprises simultaneously feeding into a reactor containing said seeds a light anhydrous alcohol,...

The present invention concerns the use of at least one alkane sulfonic acid of formula R SO3H in which R represents a linear or branched saturated hydrocarbon chain comprising 1 to 4 carbon atoms for cleaning solid deposits comprising at least one aconitic acid salt. The invention also concerns a method for cleaning...

The invention relates to a method for producing N,N-dimethylaminoethyl acrylate by the transesterification reaction of an alykl acrylate by NIN-dimethylaminoethanol, and more particularly relates to a method for purifying the azeotropic fraction generated during said reaction, thereby enabling the recycling thereof ...

The present invention relates to a liquid (meth) acrylic syrup its method of polymerization and article obtained thereof. In particular the present invention deals with a liquid (meth) acrylic syrup comprising an initiation system for polymerization atlow temperature. More particular present invention relates to a l...

The invention relates to a multilayer structure including: a so called outer layer (L1) consisting of a composition that primarily includes one or more semicrystalline copolyamides (H) the melting point of which is at least 220ºC and which contains at least 80 mol % of the following two units (s) and (a) wherein the...

The present invention relates to a method for reactively crushing jatropha seeds, said method making it possible, starting with specifically conditioned jatropha seeds in the presence of light alcohol and a basic catalyst, to carry out, in a single step, the crushing as well as the reaction for transesterifying the ...

The invention relates to an aviation fuel containing between 1 and 100 wt.-% of a fraction of a compound obtained by means of chemical transformation from renewable, natural optionally-hydroxylated monounsaturated fatty acids having a chain length at least equal to 14 carbon atoms, selected from among nitriles and m...

The present invention relates first to a polyester resin bearing at least two functions from among hydroxyl and/or carboxyl, based on: A) a polyol component comprising a1) at least one diol bearing at least two lateral c, to c. alkyl substituents, a2) at least one ·diol bearing at least one lateral methyl substitu...

The present invention provides a process for preparing a composite material containing from 15% to 60% by weight of nanotubes, comprising: (a) introducing into a compounding device a liquid polymer composition comprising at least one thermosetting resin in the liquid state, nanotubes and optionally a rheology modif...

The invention relates to a decontaminating composition comprising: (i) perpropionic acid, (ii) dipicolinic acid, (iii) a salt of hydroxyethyldiethylphosphonic acid, (iv) a surface-active agent, and (v) an alkalinizing agent. The decontaminating compositions that are the subject of the invention have a high stability...

The present invention relates to a method for preparing ricinoleic acid ester from a pure or mixed vegetable oil, in particular castor oil, wherein said method includes at least the step of enzymatic transesterification in the presence of a light alcohol and using a typo-selective lipase in order to obtain a fractio...

The present: invention relates to a process for preparing, in a co-kneader, a composite material containing a thermosetting elastomeric resin base and carbon nanotubes. It also relates to the composite material thus obtained and to its use for manufacturing composite products.

The present invention relates to a masterbatch in agglomerated solid form comprising: a) carbon nanofibres and/or nanotubes and/or carbon black, the content of which is between 15 wt% and 40 wt%, preferably between 20 wt% and 35 wt%, relative to the total weight of the masterbatch; b) at least one solvent; c) at lea...

The invention relates to a method for producing polyethylene or an ethylene copolymer comprising a step of radical polymerisation or copolymerisation of ethylene in the presence of: a first peroxidic polymerisation initiator selected from the diperketal peroxide compounds of formula (I) where the groups R1 R2 R3 R6 ...

The invention relates to a process for manufacturing tetrafluoropropene comprising alternately:  at least one step of reacting a chlorinated compound with hydrofluoric acid in the gas phase in the presence of a fluorination catalyst the proportion of oxygen optionally present being less than 0.05 mol.% relative to t...

The present invention relates to perpropionic acid compositions that are stable in a basic medium, to a method for stabilizing the perpropionic acid, and also to the use of a specific combination of compounds for stabilizing the perpropionic acid in a basic medium.

The present invention relates to a container provided with heat insulation means (8), characterized in that the heat insulation means (8) are removable and consist of a partition having a multilayered structure, or films, arranged between the wall of the tank (5) and at least the walls of two of the above-mentioned ...

The présent invention relates to a method for continuous préparation of light acrylate, by reaction of a light alcohol with a flow of raw ester-grade acrylic acid including more than 8 wt % of Michael adducts. According to said method, the thermal dissociation of the Michael adducts contained in said flow of raw e...

The présent invention relates to a method for producing a C4-C10 alkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification...

The invention relates to a binary composition of 2,3,3,3-tetrafluoropropene and of ammonia, and also to the use thereof, in particular as a heat transfer fluid. Figure 1.

1. A biodiesel fuel comprising a mixture of fatty acid esters, said mixture containing at least 1% of a naturally occurring non-fossil compound of formula ROOC-(CH2)n-CH2-R1 in-which R is either CH3 or C2H5, n is 7 or 9, and R1 is either C2H5 or CH=CH2.

The present invention relates to a method for preparing dimethyl disulphide, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form ca...

One subject of the present invention is a thermoplastic composition comprising ,a polyamide-grafted polymer that comprises a polyolefin backbone containing a residue of at least one unsaturated monomer that has reacted with at least one polyamide graft. The invention also relates to structures, in particular multil...

The subject of the present invention is a process for preparing acrolein by dehydration of glycerin, characterized in that the dehydration is carried out in the presence of a catalyst comprising mainly a compound in which protons in a heteropoly-acid are exchanged at least partially with at least one cation selected...

The present invention relates to a process for the preparation of expandable polystyrene comprising the following steps : i°) heating an aqueous suspension comprising styrene monomer and at least one organic peroxide initiator of formula (I) 1-alkoxy-1 -t-alkylperoxycyclohexane in which the alkoxy group contains 1 t...

The subject matter of the present invention is a process for synthesizing bifunctional hydrocarbon based compounds from biomass comprising a step of fermentation of the biomass and a step of oxidation of the intermediate compounds resulting from the fermentation step.

The present invention relates to a method for synthesizing a supramolecular material comprising: 1 - the reaction of at least one carboxylic diacid, or ester or chloride of such a diacid, with, on the one hand, at least one modifier compound bearing both reactive functional groups capable of reacting with the carbox...

A method for uniformly distributing a process liquid within a process vessel includes providing a process liquid to a fouling resistant liquid distributor installed within a process vessel having a cross sectional area; causing rotational movement of the fouling resistant liquid distributor; uniformly distributing t...

The invention relates to a process for the selective oxidation of carbon monoxide to carbon dioxide present in a gas mixture comprising at least one hydrocarbon or a hydrocarbon derivative, and to its integration into a process for producing hydrocarbon derivatives. The process according to the invention comprises a...

The invention relates to an impervious breathable film made of a composition that does not include polymers having polyether units and includes one or more polymers, at least one of which is an ethylene copolymer. Said impervious breathable film is moreover made of a comonomer, having the function of an acid or ...

The present invention relates to a method for reducing the crystallization temperature and the melting temperature of a polyamide powder resulting from the polymerization of at least one predominant monomer, in which the reduction in the crystallization temperature is greater than the reduction in the melting temper...

2r+232r 1The present invention relates to a method for synthesizing a nitrile/fatty ester aldehyde including the following steps: 1) hydroformylating a nitrile/ester/? unsaturated fatty acid substrate under specific partial pressure temperature reaction time nitrile/ester/? unsaturated fatty acid reactant conversion...

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbo...

The invention relates to the use of 1 1 1 2 tetrafluoroethane for increasing the miscibility of 2 3 3 3 tetrafluoropropene with a lubricating oil and in particular with a polyalkylene glycol oil. In this regard the invention provides heat transfer compositions and also equipment and processes using these composition...

The subject matter of the invention is a process for synthesizing ? functionalized acids of formula R (CH) COOH in which R is COOH or NHCH from a feedstock of natural origin containing hydroxylated fatty acids.

The present invention relates to a multilayer conductive fiber having a core/shell structure, wherein the core contains nanotubes, in particular carbon nanotubes. The invention also relates to a method for producing said fiber by coextrusion and to the uses thereof. The invention finally relates to a composite mater...

A process for the synthesis of a saturated long- 5 chain a,co-amino ester (acid) comprising from 6 to 17 carbon atoms, characterized in that it is obtained, in a first stage, by a cross metathesis reaction between a first acrylic compound, chosen from acrylonitrile, acrylic acid or an acrylic 10 ester, and a s...

The present invention relates to a composition including a dialkyl tin oxide, such as DBTO, which can be used as . ansesterification catalyst for the synthesis of (meth)acrylic esters. The invention also relates to a method for the synthesis of th)acrylic esters by transesterification in the presence of said composi...

The invention relates to a method for the synthesis of acrolein by means of dehydration of the glycerol in the presence of a solid acid catalyst having a Hammett acidity of less than +2, such as sulfated zirconium oxides, phosphated zirconium oxides, tungstated zirconium oxides, silicated zirconium oxides, sulfated ...

The present invention pertains to the field of thermosetting or thermoset polymers mainly used as materials, coatings, or adhesives. The invention more specifically relates to the use of specific molecules having associative groups including a nitrogen heterocycle as a hardener or co-hardener of thermosetting polyme...

The present disclosure relates to a semi-aromatic copolyamide, a composition comprising this polyamide, its preparation process, and also its uses, especially in the manufacture of various articles, for instance common consumer goods such as electrical, electronic or motor vehicle equipment, surgical equipment, pack...

The present invention relates to a method for producing 1,1,1,2,3,3-hexafluoropropane, involving reacting gaseous phase hexafluoropropene with hydrogen in a superstoichiometric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor. ...

The present invention relates to a method for producing 1,2,3,3,3-pentafluoropropane, involving reacting gaseous phase 1,2,3,3,3-pentafluoropropene with hydrogen in a superstoichiometric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor...

The present invention relates to the assembling by adhesive bonding of a first substrate S1 based on thermoplastic elastomer (abbreviated to TPE)and/or on poly amide (PA) homopolymer or copolymer and of a second substrate S2, it being possible for the substrates S1 and S2 to be identical or different in nature. ...

The invention relates to a composition including: 45 to 95 wt % of a semi-aromatic copolyamide containing at least two separate units having the following general formulation: A/X.T  where A is selected from among a unit obtained from an amino acid  a unit obtained from a lactam  and a unit having the formula (diami...

The invention relates to a transparent master mixture that includes an ethylene copolymer and an ethylene monomer having a polar function (a) and a peroxide (b), characterized in that said composition includes in weight: from 5 to 30 % of (b); from 70 to 95 % of (a); and in that the copolymer (a) includes from 20 to...

A method for preparing a polymeric material including a multiblock copolymer with n blocks, where n is an integer no lower than 2, which method comprises at least one cycle of steps including (a) a step of synthesising a block by performing con¬trolled free-radical polymerisation of one or more free-radical polyrner...

The Subject - matter of the invention is a process for the preparation of polyfunctional living (co) polymers by polymerization by the radical route of one or more vinyl monomers in the presence of the polyalkoxyamines prepared from monoalkoxyamine(s) of formula (I): and of at least one polyunsaturated compound of ...

This invention relates to a UV stabilized transparent acrylic composition. More specifically the acrylic composition is stabilized with a carboxylic acid compound, which prevents or delays deterioration of the acrylic composition from high intensity UV radiation. The carboxylic acid compound is preferably an alpha h...

The present invention relates to composition coextrudable with PVDF and comprising: . 30 to 50 parts of PVDF; . 70 to 50 parts of a copolymer (A) comprising, by weight, 90 to 50% of methyl methccrylate (MMA) per 10 to 50% of an alkyl (meth)acrylate respectively, the alkyl having from 2 to 24 carbon atoms; . 1 to ...

The present invention relates to a process for the manufacture of pentafluoroethane. It more particularly relates to a process for the manufacture of pentafluoroethane by gas-phase fluorination of perchloroethylene (PER) in the presence of a catalyst, characterized in that (i) the reaction of the PER with HF is carr...

The invention relates to a coating composition comprising a radiation grafted functionalized fluoropolymer. This coating is preferably in the form of a powder coating. The coating can be used on inorganic substrates, especially un-primed metals. The invention also relates to the coated inorganic substrate and t...

The invention relates to coated reactors resistant to acid corrosion, the production method thereof and the use of same in processes in superacid media. More specifically, the invention relates to a reactor comprising an inner metal wall having a fluoropolymer coating anchored thereto using a perforated sheet positi...

The invention relates to a multilayer structure comprising (from the inside towards the outside): • a layer C1 comprising at least one functionalized fluoropolymer, optionally blended with at least one compatible fluoropolymer; • a layer C2 comprising at least one adhesive tie; • a layer C3 comprising at least o...

The invention relates to a sulphur donor curing agent comprising a combination of between 10 and 90 wt.- % of a mixture of polysulphides of poly(alkyl phenol) and between 90 and 10 wt.- % urea.The method of curing an EPDM-type elastomer composition presents no risk to the nitrosamines used to implement same. ...

The subject of the present invention is aprocess for synthesizing nanotubes, especially carbon nanotubes, by decomposition of a gas source, at a temperature ranging from 400 to 1200 °C in a reactor, by bringing it into contact with at least one (one or more) multivalent transition metals, the transition metal(s) bei...

The aim of the invention is to purify (meth)acrylic acid obtained by the catalytic or redox oxidation of a gaseous substrate consti luted of propane and/or propylene and/or of acrolein during the produc-tion of acrylic acid, and of isobutane and/or isobutene and/or tert-butyl alcohol and/or of rnethacrolein during...

Process for purifying the hydrochloric acid obtained as by-product in the synthesis of MSA, characterized in that the gaseous flow of hydrogen chloride evacuated from the top of the synthesis reactor is placed in contact in a treatment column, counter-currentwise, with a flow consisting of an aqueous solution of an ...

The present invention relates to a hose for transporting petrol in a service station for conveying the petrol from the storage tank to the petrol dispenser and from the petrol dispenser into the customer's car, comprising: an outer layer consisting of a polyolefm or irradiation-grafted fluoropolymer, an inner laye...

The inventive method for purifying (meth)acrylic acid by oxidising a propane and/or propylene and/or acrolein (acrylic acid production) and isobutane and/or isobutene and/or tert-butyl alcohol and/or methacroleine (methacrylic acid production) gaseous substrate consists in sending a gaseous mixture of a reaction (1)...

Multilayer acrylic film comprising: - a layer (A) made from a thermoplastic acrylic composition - a layer (B) made from either a composition comprising a methacrylic (co)polymer and an impact modifying compound, or a composition prepared by sequential polymerization in aqueous emulsion of acrylate based monomer s...

Master batch (A) comprises (wt.%): a mixture (1-50) of a fluorinated polymer (I) and interface agent (II); and polyolefin (III) (99-50) (where the two components (I) and (II) are thoroughly mixed at a temperature in which one of the two components is in melted state in its mass or on its surface and then the obtaine...

The subject of the present invention is a process for preparing a precomposite based on nanotubes, comprising bringing said nanotubes into contact with at least one given plasticizing agent. It also-relates to a precomposite thus obtained, and to its use for conferring at least one electrical, mechanical and/or the...

The invention relates to a method for preparing a living polymer comprising methacrylic and/or methacrylate units using a monofunctional or polyfunctional alkoxyamine consisting in polymerising one or several types of methacrylic and/or methacrylate monomers in the presence of at least one type of styrenic monomer. ...

The invention concerns a multilayer tube comprising (viewed from inside outwards of the tube): optionally a layer Cx comprising at least one fluorinated polymer; a layer C2 comprising at least one functionalized fluorinated polymer, optionally mixed with at least one fluorinated polymer; a barrier layer C3 comprisin...

The invention relates to a method for preparing acrylic acid from an aqueous glycerol solution, comprising a first step of dehydration of the glycerol to acrolein, carried out in the gas phase in the presence of a catalyst and under a pressure of between 1 and 5 bar, and a second step of oxidation of the acrolein to...

The invention relates to the use of carbon nanotubes for the production of an electrically conductive organic com position having an electrical resistivity lhat is constant as a function of temperature and to the applications of said compositions The conductive organic composition has a temperature insensitive elect...

The invention concerns an adhesive composition consisting of at least one ethylene polymer or copolymer, said composition comprising at least one unsaturated carboxylic acid ester comonomer, and at least one functional comonomer, useful in an extrusion-coating process for application on a support or in an extrusion-...

The invention relates to linear or star block copolymers, the preparation method thereof and the use of same in adhesive compositions, for example as a pressure-sensitive adhesive. The inventive copolymers are prepared by means of nitroxide-controlied radical polymerisation and have at least one soft block at Tg les...

The present invention relates to a structure successively comprising: a layer of barrier polymer,a tie layer comprising, the total being 100%: 1 to 80% of at least one polyethylene carrying epoxy functional groups, 99 to 20% of at least one viscous polymer compatible with the polyethylene carrying epoxy functional...

The invention relates to a method of preparing dimethylcetene (DMK) by pyrolysis of isobutyric anhydride (ANIB), consisting in: (a) pre-heating a mixture to between 300 and 340 °C at atmospheric pressure, said mixture comprising between 1 and 50 % volume ANIB for between 99 and 50 % inert gas respectively; (b) bring...

The invention relates to the use of a coextruded multilayer film for protecting a (ligno)cellulose material, wherein said multilayer film consists of the following arranged to each other layers: a surface layer (1) comprising PVDC and possibly PMMA in the form of the main components, an intermediate layer (II) compr...

The invention relates to a method for preparing acrylic acid by oxidizing propylene and then acrolein, involving the recycling of gases that had not reacted by means of a partial oxidation of the propane, in parallel, at the end of the acrylic acid recovery step, then returning, to the propylene-converting reactor, ...

The invention relates to a method for preparing a powdered polymer selected from a polyamide, a copolyamide or a copolyesteramide by anionic polymerisation in a solvent solution, characterised in that the polymerisation of the monomer(s) generating said polymer is made in the presence of a catalyst, an activator, at...

The invention relates to a seeded particle of polyamide (PA) powder composed of a shell made of PA-6, PA-12 or PA-6/12 and of a core made from PA-6, PA-11, PA-12, PA-6/12, PA-6,12, PA-6,6, PA-8 or PA-4, the core and the shell being either of identical polyamide nature but of different molecular weight or of differen...

The invention relates to a method for grafting a compound by irradiation, that can be grafted onto a fluorinated polymer, preventing the destabilisation of the fluorinated polymer. Said method comprises the following steps: a) the fluorinated polymer is mixed in the melted state thereof with a graftable compound; b)...

The present invention relates to an improved process for preparing foundry shapes by the cold box process, a process for making cores and moulds and a process for casting metals, carrying out as curing catalyst system a blend comprising at least two tertiary amines.

The invention related to a method for the production of acrylic acid from propane, in which a gas mixture comprise- in propane, water vapors and, optionally, an inert gas and/or molecular oxygen is passed over a catalyst, compressing a crystalline catalyst phase of formula (1) or (1) Te1Mo1V1lNBzOx (1) Sb2 Mo1 ...

The invention relates to a novel way to synthesize acrylonitrile from a renewable raw material and more particularly relates to a method for producing acrylonitrile by the ammoxidation of glycerol in gaseous phase. The method can be implemented in a single step, or the glycerol can be previously submitted to a dehyd...

The invention relates to multi-layer composites for use as a screen, having at least three layers, with an inner diffusing layer and at least one substrate layer on either side. The diffusing layer contains small particles having a narrow particle size distribution that are refractive-index mismatched with the polym...

The Invention relates to the use of a multilayer film for protecting a substrate which gives off volatile compounds which comprises: a surface layer comprising, by weight, from 70 to 100%, preferably from 90 to 100% of a fluropolymer and from 0 to 30% preferably form 0 to 10% of an acrylic polymer ; an adhesive l...

The invention concerns a multilayer structure comprising: a PVDF-based film Flaffixed to a PET or PEN sheet or a PVDF-based film Fl affixed to a PET or PEN sheet which is itself affixed to a PVDF-based film F2, The Fl and/or F2 films comprising (starting from the PET or PEN sheet): optionally a layer of composition...

The invention relates to a composition comprising a latex and at least one copolymer that may be obtained via a monomer polymerization process, comprising a step of placing in contact, in a medium comprising water, the said monomer (s) with at least one initiator corresponding, for example, to the formula: ...

The invention relates to an alkoxyamines of formula (I) below: in which R1 may be a hydrogen atom, R2 and R3 alkyl groups, such as a methyl group, R4 a phenylene group bearing an -SO3Na group, R5 a hydrogen atom, and R6 and R7 alkyl groups, such as an ethyl group. Use of these alkoxyamines as a radical polymeri...

The present invention relates to hybrid impact modifiers prepared by : either spray drying, coagulation, freeze coagulation or other known recovery methods of a mixture of a latex or slurry of standard impact modifiers and a slurry of a mineral filler, either simultaneous drying (by spray-drying, coagulation other k...

The invention relates to a method for producing acrylic acid in one step by an oxydehydration reaction of glycerol in the presence of molecular oxygen. The reaction is preferably carried out in gaseous phase in the presence of a suitable catalyst.

Q The present invention relates to a conductive carbon nfmutube-polymer composite, comprising carbon nanotubes, and a mixtureoi-pelymers in a form of coalesced polymer particles, wherein the mixture of polymer particles in their non coalesced form is defined by the presence of at least two population of polymer ...

A compound for the preparation of a medicament for treating movement disorders'comprise administering to a human or animal subject in need of treatment a therapeutically effective amount of at least one compound according to the following formula: wherein R3 and R4 are each independently phenyl and R1 and R2 are eac...

The present invention relates to a process for the preparation of the alkoxyamine 2-methyl-2-[N-(diethoxyphosphoryl-2, 2-dimethylpropyl) aminoxy] propionic acid or of its salts comprising a stage of saponification of an azo compound in the presence of a base, a stage of photolysis of the salt resulting from the sapo...

ABSTRACT Solid polymer electrolyte (SPE) comprising at least one electrolyte salt and at least one linear triblock copolymer A-B-A, in which: - the blocks A are polymers that may be prepared from one or more monomers chosen from styrene, o-methylstyrene, p-methylstyrene, m-t-butoxystyrene, 2,4-dimethylstyrene, m-c...

The present invention relates to a process for preparing (hydro) (chloro)fluoroolefins comprising at least one step of fluorination in the liquid phase of a (hydro)haloalkane or of a (hydro)haloalkene in the presence of at least one ionic liquid as a catalyst. The ionic liquids are derivatives of Lewis acids based o...

The present invention relates to flame-retarded flexible thermoplastic compositions of high thermomechanical strength, containing no halogen compound, comprising a graft copolymer containing polyamide blocks and composed of a polyolefin backbone and on average at least one polyamide graft, in which the grafts ...

The subject of the invention is a novel method of preparing a composite powder from a porous filler and a thermoplastic. The subject of the invention is also composite porous fillers, especially porous silicas, containing thermoplastics, and their use.

The invention relates to a photovoltaic module for capturing and using solar radiation having as a transparent glazing a thermoplastic structural component covered by a thin polyvinylidene fluoride layer. The polyvinylidene fluoride layer is exposed to the environment and provides a chemical resistant and dirt shedd...

The invention concerns the production of acrylic acid from propane in the presence of molecular oxygen. Said method consists in passing a gas mixture comprising propane, molecular oxygen, water vapour and,otionally, an inert gas, on a catalyst of formula (I) Mo1VaTebNbcSidOx to oxidize propane into acrylic acid, th...

FGF receptor agonist compounds corresponding to the general formula: M1-L-M2 in which M1 and M2, which may be identical or different, each represent, independently of one another, a monomer unit M, and L represents a linker group which covalently links M1 and M2, wherein said monomer unit corresponds to the general ...

The invention is targeted at a joint process for the production of fatty nitrites and/or amines and of dialkyl carbonates of formula RiO-CO-ORi, in which Ri comprises from 1 to 4 carbon atoms, from an ester of a saturated or unsaturated fatty acid resulting from natural oils, comprising the following zones: I) zone ...

The invention is directed toward a conjugate process for producing fatty nitriles and/or amines and propylene carbonates from a natural oil, including the following zones: I) zone for methanolysis or hydrolysis of a natural oil containing a triglyceride of at least one fatty acid producing, on the one hand, the meth...

A subject of the present invention is a process for producing carbon nanotubes, comprising the following stages: a). the synthesis of alcohol(s) 'by fermentation of at least one vegetable matter and optionally the purification of the product obtained; b) the dehydration of the alcohol or alcohols obtained in a) ...

The present invention relates to the use of a multi-layered structure for the manufacture of gas conducts, namely for methane. The multi-layered structure comprises, from the inside to the outside, the following successive layers: a layer containing at least one polyamide, wherein the polyamide is chosen from PAH, P...

The invention relates to a multilayer tube comprising (from the inside to the outside of the tube): an optional layer (C1) consisting of at least one fluorinated polymer; a layer (C2) consisting of a mixture containing at least one functionalized fluorinated polymer and at lest one flexible fluorinated polymer ha...

The invention relates to a multilayer tube comprising (from the inside to the outside of the tube): an optional layer (C1) consisting of at least one fluorinated polymer; a layer (C2) consisting of at least one radiation-grafted fluorinated polymer which is optionally mixed with at least one fluorinated polymer; an ...

The present invention relates to a continuous process for the fluorination of perchloroethylene in the gas phase in a single stage with hydrofluoric acid (HF) in the presence of a catalyst to give, as major product, pentafluoroethane. The process is characterized in that it is carried out at a temperature of between...

The present invention discloses a method for the production of acrylic acid from propane, wherein: (a) a gaseous mixture devoid of molecular oxygen and comprising propane, water vapour, as well as, if appropriate, an inert gas, is introduced into a first reactor with a moving catalyst bed, (b) at the outlet of the f...

The present invention relates to an electrically conducting adhesive composition, containing: (a) from 0.1% to 5% by weight of carbon nanotubes and (b) at least 95% by weight of at least one copolyamide that can be obtained from at least two different starting products chosen from: (i) lactams, (ii) aminocarboxylic ...

The invention concerns a cationic catalysis system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter-anion generated by the reaction between the catalyst (K) and the initiator (I). Said cocalalyst is characteri...

According to a first embodiment, the present invention relates to the use for transporting petrol in a service station of a hose comprising: an inner layer in contact with the fluid to be transported, consisting of a grafted fluoropolymer and, directly attached to the latter, a polyolefin outer layer. According to...

The subject matter of the present invention relates to a vaporization method of aqueous glycerol solutions in a fluidized bed containing an inert solid. The invention provides a method for vaporizing, in a single step, an aqueous glycerol solution and simultaneously eliminating the impurities present in this solutio...

Multilayered acrylic film consisting of: - a layer (A) manufactured from an acrylic thermoplastic compound - a layer (B) manufactured either from a compound consisting of a metha- acrylique (co)polymer and a compound modifying shock, or a compound prepared by block polymerization in aqueous emulsion of monomer s...

The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: a polyamide outer layer (1); an inner layer (2) of a composition comprising, the total being 100%, 5 to 30% by weight of a blend (A) comprising: a polyethylene carrying epoxy functional groups, a...

The present invention relates to cosmetic compositions used in the care and make-up field. This composition mainly comprising a continuous aqueous phase, a fatty phase and a fine and porous pulverulent copolyamide powder phase, is in the form of creamy, liquid or gelled compositions. This is in particular an emulsio...

Method for radical emulsion polymerization using hydrosoluble alkoxyamines The present invention relates to a process for radical emulsion, miniemulsion or microemulsion polymerization employing at least one water-soluble alkoxyamine. This process makes it possible to prepare multiblock (co)polymers, in particular...

The inventive method for corrosion control of metal walls of a refining unit by naphthenic acids consists in using tertiary mercaptan of general total formula CnH2n+1-SH, wherein n ranges from 8 to 14.

The compounds of formula (I) are provided as deposition inhibitors which prevent the deposition of compounds of polymeric nature or resulting from addition reactions to (meth)acrylic double bonds during operations for the synthesis or purification or regeneration of (meth)-acrylic monomers.R1 represents a C3-C30 alk...

The invention relates to thermoplastic polymer compositions in the form of masterbatches, comprising a matrix of an olefinic copolymer obtained from olefinic monomers and at least one alky! (meth)acrylale monomer, in which exfoliable organophile fillers of the lamellar type are dispersed, such as silicates, charact...

The invention relates to an improved process for the manufacture of C1-C4 alkyl (meth)acrylates by a direct esterification of (meth)acrylic acid by the corresponding alcohol in the presence of sulphuric acid, phenothiazine being used as polymerization inhibitor. The said process comprises a stage of recovering in va...

Composition which can be used in particular as odorant for a gaseous fuel, more particularly natural gas, comprising: from 0.1 to 49.9 parts by weight of at least one alkyl sulphide (I) of formula: R1-S-R2 in which R1 and R2, which are identical or different, represent: an alkyl radical comprising from 1 to 4 ca...

The invention relates to a method of preparing acrylic acid by selective oxidation of propane in a circulating fluidised bed or in a fluidised bed in the presence of a catalyst having structure MO1VaXbZcSi,dO,(I), wherein X represents tellurium or antimony and Z represents niobium or tantalum, and in which: - a is b...

The invention is targeted at a process for the synthesis of diacids or diesters of general formula ROOC-(CH2)x-COOR, in which n represents an integer between 5 and 14 and R is either H or an alkyl radical of 1 to 4 carbon atoms, starting from long-chain natural monounsaturated fatty acids or esters comprising at lea...

The present invention relates to pulverulent compositions based on carbon nanotubes which exhibit an excellent dispersibility in polymer materials and can advantageously be used as reinforcing agents and/or modifiers of conducting and/or thermal properties; they can be easily incorporated in polymer matrices in the ...

The present invention describes the use of copolymers with a composition gradient as sole stabilizer in emulsion free-radical polymerization. The copolymers of the invention are prepared via controlled free-radical polymerization and comprise at least one hydrophilic monomer such as acrylic 10 acid ...

The subject of the present invention is a process for synthesizing carbon nanotubes of greater carbon purity using the technique of chemical vapor deposition. The nanotubes obtained may advantageously be used in all known fields of application of carbon nanotubes.

Apparatus (30) for the sealed fixing of a tube (1) at the pouint where it enters a receptacle is provided. One end (10,11) of the tube (1) forming a ball joint (7, 8, 10, 11), cooperating with a component (7, 8) made of flexible material, is rigidly mounted in relation to the receptacle. Said apparatus (30) has; a s...

The invention relates to the use of monoliths as particle filters for limiting the deactivation of catalysts during catalytic reactions in multi-tubular reactors. The invention is particularly well-suited for catalytic oxidation reactions in the gaseous phase, The invention also relates to multi-tubular reactors inc...

Alkoxyamines of formula: in which R represents a linear or branched alkyl radical having a number of carbon atoms ranging from 1 to 3, R1 represents a hydrogen atom Or a residue: in which R3 represents a linear or branched alkyl radical having a number of carbon atoms ranging from 1 to 20, and R2 represents hydrog...

The invention is targeted at a process for the synthesis of diacids of general formula ROOC-(CH2)n-(CH=CH)a-(CH2)mCOOR1, in which n and m, which are identical or different, each represent an integer such that their sum is between 6 and 15, a is an index equal to 0 or 1 and R and R1 are either H or an alkyl radical c...

The invention concerns a method for preparing (meth)acrylic esters or anhydrides from acrylic acid of formulae (I), wherein R is H or Me, and R' is alkyl and R" is alkyl or ethyl substituted by dialkylamino whereof the alkyls can form with the nitrogen atom, a 5- or 6-membered heterocycle, capable of bearing one o...

The invention relates to a process for the conversion of ricinoleic acid comprising the following successive stages: a) the fermentation of ricinoleic acid by a bacterium, a yeast or a fungus, in order to obtain 7-hydroxy-9-octadecenedioic diacid, b) the esterification of the 7-hydroxy-9-octadecenedioic diacid obt...

The invention relates to a method for obtaining composite fibres, that comprises dispersing colloidal particles in a solvent, injecting the dispersion into a co-flow of a polymer coagulation solution for forming a pre-fibre, circulating the pre-fibre in a duct, extracting, optionally washing and drying the pre-fibre...

Mixture to be employed specifically as an agent for adding an odour to a gaseous combustible fuel such as natural gas, consisting of: at least one alkyl acrylate (I) of which the alkyl radicals contain from one to 12 carbon atoms; at least one compound of formula (II) in a quantity sufficient to inhibit the polymeri...

The invention relates to a method for the synthesis of short-chain w-unsaturated fatty acids of general formula CH2=CH-(CH,),-COOR in which n is an integer between 2 and 11 and R is H or an alkyl radical containing from 1 to 4 carbon atoms, from longchain monounsaturated fatty acids or esters of formula CH3-(CH2)...

Coupling agent consisting of a combination of: - 10 to 90% of a blend of poly(alkylphenol) polysulfides of formula: in which: - R is an alkyl radical containing 1 to 20 carbon atoms; - n and n' are two integers from 1 to 8; - p is an integer from 0 to 50; and - 10 to 90% of bis(triethoxysi...

Process for the impregnation of a metal hydrotreating catalyst in the oxide form with at least one orthophthalate optionally dissolved or dispersed in a liquid. Process for the sulphidation of a metal hydrotreating catalyst in oxide form, comprising: - a) a stage of impregnation according to the said process, foll...

The present invention relates to a process for manufacturing a laminate comprising at least two polymer layers, a layer (A) and a layer (B) attached to one another by at least one layer of an aqueous-type adhesive polymer material (C), characterized in that it comprises: (a) optionally a step of precleaning the lay...

The present invention relates to the acidic cleaning in the beer industry, and more particularly an improved process for acidic cleaning of the various elements and vessels that are used in the preparation of beer and other and other related fermented beverages, said cleaning being carried out by using a formulation...

The invention provides a technology for producing acrolein from glycerol while maintaining high reagent partial pressures, which leads to a higher yield. The invention more particularly relates to a method for producing acrolein from glycerol that comprises the intermediate step of forming glycerol and acrolein cycl...

The present invention relates to a process for manufacturing acrolein by gas-phase dehydration of glycerol in the presence of strongly acidic solid catalysts with a Hammett acidity HO of between -9 and -18 and preferably between -10 and -16.

The present invention relates to a process for manufacturing acrolein by dehydration of glycerol in the presence of molecular oxygen. The reaction is performed in the liquid phase or in the gas phase in the presence of a solid catalyst. The addition of oxygen makes it possible to obtain good glycerol conversion by i...

(Co)polymers obtained by (co)polymerization of at least one   monomer which can, be polymerized by the radical route under  bulk,    solution, emulsion, suspension or miniemulsion conditions     in    the presence of an alkoxyamine of formula: in which R represents a linear or branched alkyl radical having anumber ...

The invention relates to the use of organic compounds of the polyoxymethylene dialkylethers type as a component in hydrocarbon distillates in particular gas oils of compositions comprising a) a mixture of at least one compound An of formula X-(O-CH2)n-O-X in which n represents an integer from 1 to 5 where X is r...

The invention relates to a gas phase continuous method for preparing 2,3,3,3-tetrafluoro-1-propene, said method comprising the following steps: (i) hydrogenation of hexafluoropropylene to form 1,1,1,2,3,3 -hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the previous ste...

The invention relates to a method for selective dehydrofluorination on a mixed catalyst based on chromiun and nickel on a carrier based on aluminium. The invention is used for the synthesis of 2, 3, 3, 3-tetrafluoro-1-propene and 1,2,3,3,3- pentafluoro-1-propene.

Transparent blend or alloy comprising, by weight, the total being 100%: (A) 1 to 99% of at least one constituent copolymer: being amorphous or exhibiting a crystallinity ranging up to semicrystallinity; and comprising: (A1) amide units, including at least one cycloaliphatic unit; (A2) flexib...

The invention relates to free-radical polymerization and free-radical cross-liking are more particularly provides a process of free-radical polymerization or cross-linking wherein at least one polymerizable monomer or at least one compound to be cross-linked is contacted in the presence of at least one selected orga...

The present invention relates to a process for the continuous preparation sereded organic peroxides using plate exchangers having a high heat exchange capacity.

The invention relates to a segmented block copolymer including polyamide blocks, polyester blocks and polyether blocks of the general formula (I) -[BD - BM]n- in which: BD or hard block is a polyamide block; BM or soft block is a mixture of polyether blocks and polyester blocks; and n is the number of -BD...

The invention relates to a segmented block copolymer including polyamide blocks, polyester blocks and polyether blocks of the general formula (I) -[BD - BM]n- in which: BD or hard block is a polyamide block; BM or soft block is a mixture of polyether blocks and polyester blocks; and n is the number of -BD...

The present invention relates to the assembly by adhesive bonding of a first substrate S1 made of thermoplastic polymer elastomer (abbreviated TPE) or of homopolymeric polyamide (abbreviated PA) or copolymeric polyamide (abbreviated coPA) and of a second substrate S2. The substrates S1 and S2 may be of the same kind...

The invention concerns a multilayer tube comprising (from the inside to the outside of the tube): optionally a layer C1 of a fluorinated polymer; a layer C1 of a fluorinated polymer whereon is radiation grafted at least one unsaturated monomer, optionally mixed with a fluorinated polymer; optionally a layer C3 ...

The invention relates to a method for preparing a lauryl lactam consisting in carrying out a Beckmann rearrangement of a cyclododecanone oxime. Said method is carries out in a gaseous phase at a temperature ranging from 180 to 450 °C in the presence of a microporous material having a three-dimensional main inorganic...

1. Composition comprising: from 85 wt% to 99.999 wt%, preferably from 90 wt% to 99.999 wt%, more preferably from 95 wt% to 99.99 wt%, still more preferably from 97 wt% to 99.99 wt% (limits included) of at least one monoalkyltin compound of formula RSn(T)3, in which R is linear, branched or cyclic C1-C20 alkyl, pref...

The invention relates to a hydrocyanic acid containing bioresource carbon, and to a method for producing a raw material mainly containing the same by reacting ammonia with methane or methanol optionally in the presence of air and/or oxygen, characterised in that at least one of the reagents selected from ammonia, me...

The present invention relates to a composition containing at least one (meth)acrylic polymer and at least one copolymer containing motifs from at least one first monomer (A), enabling compatibility with said (meth)acrylic polymer, and at least one second motif (B) carrying an associative group. The invention also re...

(EN) The invention concerns a multilayer structure comprising: a PVDF-based film Flaffixed to a PET or PEN sheet or a PVDF-based film Fl affixed to a PET or PEN sheet which is itself affixed to a PVDF¬based film F2, The Fl and/or F2 films comprising (starting from the PET or PEN sheet): optionally a layer of composi...

The present invention relates to a multilayer hose for compressed air comprising, in this order: an outer layer (1) made of polyamide, optionally an intermediate layer (2) of a polymer having a flexural modulus of less than 500 MPa, an inner layer (3) of a polymer having a flexural modulus of greater than 110...

The invention concerns the selective oxidation of propane into acrylic acid using highly selective catalysts and relates more particularly to a process for preparing these improved catalysts and their use for the production of acrylic acid from propane. The improved catalysts having the formula: MojVa(Te and/or Sb)b...

A method for producing pentafluoroethane, comprising (i) a step during which perchloro-ethylene and, optionally, 2,2-dichloro-1,1,1-trifluoroethane and/or 2-chloro-1,1,1,2-tetrafluoroethane react(s) with hydrofluoric acid, in" the gas phase, in the presence of a catalyst in an adiabatic multi-stage reactor, and opti...

The invention relates to a method for the synthesis of dialkoxyalkanes by means of the partial selective oxidation of a light alcohol. According to said method, the light alcohol is oxidised in the presence of molecular oxygen or a gas containing molecular oxygen, and a solid oxidation catalyst based on at least one...

The invention relates to a method of manufacturing fibres made of a composite based on a thermoplastic polymer and conducting or semiconducting particles; which includes a heat treatment, said heat treatment consisting in heating the composite, by progressively raising me temperature, having the effect of improving ...

The present application concerns a process for manufacturing maleic anhydride, comprising the following steps: a) fermenting renewable raw materials and optional purification in order to produce a mixture comprising at least butanol; b) oxidizing butanol to maleic anhydride at a temperature generally in the range 30...

The present invention relates to the use of an encapsulated adhesion promoter in an effective amount in an aqueous adhesive joint, said aqueous adhesive joint being intended to bond a surface of a first substrate (S1) to a surface of a second substrate (S2), at least one of said two substrates comprising a material...

Mixture comprising at least 0,0-tert-butyl-O-(2-ethylhexyl) monoperoxycarbonate and at least 0,0-tert-amyl-O-2-ethylhexyl monoperoxycarbonate, characterized in that the said 0,0-tert-amyl-0-2-ethylhexyl monoperoxycarbonate is present in the mixture in a content ranging from 0.001% to 45% by weight relative to the to...

The present invention relates to a pulverulent composition for the manufacture of articles having a metallic appearance that is stable over time and an improved resistance to pencilling, said composition comprising: from 50 to 99.9% by weight of at least one thermoplastic polymer, from 0.1 to 5% by weight of at leas...

The invention relates to a method for the synthesis of an acrylic acid ester of formula CH2=CH-COO-R wherein R is an alkyl radical comprising between 1 and 18 carbon atoms and optionally comprising a heteroatom and nitrogen, characterised in that, in a first step, glycerol CH2OH-CHOH- CH2OH is subjected to a dehydra...

The invention relates to an electrode composite and to its manufacturing process. The composite comprises an active element, i.e. one exhibiting electrochemical activity, a conductive additive and a binder. According to the invention, the conductive additive is a mixture of conductive additives containing at least c...

A block copolymer derived from at least one tetrahydrofuran monomer containing 14c.

An elastomer material comprising flexible polymer chains associated with one another, on the one hand, via permanent crosslinking bridges having covalent bonds and, on the other hand, via crosslinking bridges having noncovalent bonds.

The invention relates to composition-gradient copolymers, comprising: - repeat units resulting from the polymerization of at least one first monomer M1, the corresponding homopolymer of which exhibits a glass transition temperature Tg1 of less than 20°C, said repeat units representing from 15 to 40% by weight, with...

A process for the transesterification hydroxylated oil in which the transesterification is carried out . in the presence of methanol or ethanol and a basic catalyst under temperature, pressure and alcohol/oil weight ratio conditions allowing a greater than 95% conversion of the hydroxylated oil to fatty acid esters ...

The invention relates to a process for the manufacture of vinyl chloride monomer comprising the preparation of acetylene from one or more renewable starting materials and then the reaction of the acetylene with hydrogen chloride in order to form vinyl chloride monomer. The invention also relates to the vinyl chlo...

The present application relates to a process for the manufacture of copolymers of ethylene and of at least one vinyl ester, comprising the following steps: a) fermentation of renewable starting materials so as to produce at least one alcohol comprising ethanol; b) dehydration of the alcohol obtained so as to produce...

The present application relates to a process for the manufacture of copolymers of ethylene and of at least one vinyl ester, comprising the following steps: a) fermentation of renewable starting materials so as to produce at least one alcohol comprising ethanol; b) dehydration of the alcohol obtained so as to produce...

The invention relates to a composition that comprises a polymer binder and a catalytic compound which comprises catalytic activated carbon and carbon nanotubes. The catalytic compound comprises carbon nanotubes obtained by chemical vapor deposition of a hydrocarbon heated from 400 to 1100°C on activated carbon tha...

A process for producing pentafluoroethane, comprising (i) a step during which perchloroethylene reacts with hydrofluoric acid, in the gas phase, in the presence of a catalyst, and (ii) a step of separating the products derived from the reaction step in order to give a fraction (A) of light products comprising hydroc...

The invention relates to a VDF copolymer and at least one monomer copolymerisable with the VDF having at least 50% of its weight in VDF, preferably at least 75%, onto which at least one unsaturated polar monomer is radiation-grafted, characterized in that, prior to grafting, the VDF copolymer has the following chara...

The subject matter of the invention is a process for preparing fluoroolefin compounds. The invention relates more particularly to a process for producing a (hydro)fluoroolefin compound, which comprises (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at le...

The invention relates to a composition comprising at least one first polyamide  conforming to the formula MXD.10 or MXD.10/Z and having a melting temperature Tf1  and at least one second polyamide. Said at least second polyamide has a melting temperature Tf2 such that Tf1-40°C = Tf2 < Tf1+20°C. The invention ...

The present invention relates to the masking of the odour of organic sulphides and more particularly that of alkyl sulphides or of dialkyl sulphides, especially dimethyl sulphide, and also of oxides thereof, and especially of dimethyl sulphoxide, by addition, to said organic sulphides, of at least one odour-masking ...

An aim of the present invention is to produce, from glycerol, a bioresourced acrylic acid, that is to say an acrylic acid essentially based on a carbon source of natural origin, corresponding to a degree of purity corresponding to the requirements of the users. The process according to the invention comprises a fina...

The present invention relates to a process for the preparation of expandable polystyrene comprising the following steps: - i) heating an aqueous suspension comprising styrene monomer and at least one organic peroxide initiator of formula (I) 1-alkoxy-1-t-alkylperoxycyclohexane in which the alkoxy group contains 1 t...

The invention relates to a method for manufacturing a thermoplastic composition including: a polyester resin (c); a mixture including a copolymer (a) of an a-olefin and of a monomer having an ethylenic unsaturation and an epoxy function  as well as a core-shell compound (b); characterized in that said method include...

The invention relates to compositions containing 2 3 3 3-tetrafluoropropene and to the uses thereof as heat transfer fluids  expansion agents  solvents and aerosols. The invention specifically relates to compositions essentially containing between 15 and 50 wt. % of 2 3 3 3 tetrafluoropropene  between 5 and 40 wt. %...

The invention relates to compositions containing 2 3 3 3-tetrafluoropropene and to the uses thereof as heat transfer fluids  expansion agents  solvents and aerosols. The invention specifically relates to compositions essentially containing between 10 and 90 wt. % of 2 3 3 3-tetrafluoropropene  between 5 and 80 wt. %...

The invention relates to the use of binary compositions of 2 3 3 3-tetrafluoropropene and difluoromethane as a heat transfer fluid in compression  low-temperature and average temperature refrigeration systems  with exchangers operating in counterflow mode or in split flow mode with counterflow tendency. The inventio...

The invention relates to a heat transfer method using ternary compositions containing 2 3 3 3-tetrafluoropropene  1 1-difluoroethane and difluoromethane  said compositions being especially interesting as a heat transfer fluid in compression refrigeration systems comprising exchangers operating in counterflow mode or...

The invention relates to a composition including (i) at Least one elastomer selected from natural rubber and a synthetic polymer or copolymer resulting from the polymerisation of a majority of monomers with a molecular weight of less than 400 gmol and (ii) at least one supramolecular polymer resulting from the react...

The present invention relates to a method for preparing a recyclable polyamide powder, said method including the following consecutive steps: a) a step of adding 0.01 to 5 wt% of at least one antioxidant in powder form to a mixture including 20 to 95 wt% of polyamide powder and 5 to 80 wt% of liquid, relative to the...

The present invention relates to a coating composition in the form of a loose powder including the following by weight: 50% to 99.99% of polyamide powder, and 0.01% to 0.5% of polypropylene glycol, out of the total weight of the composition. The present invention relates in particular to a coating composition in the...

The invention relates to a semiaromatic polyamide  to the process for preparing same  to a composition comprising such a polyamide and to the uses thereof. This polyamide consists of 70 to 95 mol% of a first repeating unit obtained from the polycondensation of at least one first linear or branched aliphatic diamine...

The present invention relates to a composition including a mixture of a cross-linking agent and a first polyolefin including a functional monomer (X) selected from among unsaturated carboxylic diacid or carboxylic acid anhydrides  the unsaturated carboxylic acids and the unsaturated epoxides being suitable for cross...

The present invention relates to the manufacture of a "polymer grade" bio based acrylic acid said "polymer grade" being defined by a minimum C content and by the content limiting thresholds for impurities detrimental to the polymerization methods in particular total aldehydes protoanemonin maleic anhydride and non p...

The present invention relates to a process for preparing CNTs by bringing a carbon source into contact with a multivalent metal and/or metal-oxide-based catalyst deposited on an inorganic substrate having a BET specific surface area of greater than 50 m2/g. The CNTs obtained may be used as agents for im...

The invention relates to a biostatic neutralizing composition for aqueous fluids including two amines one of which is dihydroxyethylamine. The invention also relates to the use of such a composition as a biostatic neutralizing additive for industrial aqueous fluids. The invention further relates to the industrial aq...

The invention relates to the use of block copolymers, obtained by controlled radical polymerisation in the presence of alkoxyamine derivatives of substituted nitroxides, for the production of perfectly transparent acrylic films with the mechanical properties required for the applications envisaged, whereby the trans...

The invention relates to a method for manufacturing polyethylene or an ethylene copolymer including a step of free radical polymerisation or copolymerisation of the ethylene at an initiation temperature varying from 150°C to 200°C at a pressure varying from 500 to 3000 bar in the presence of a peroxidic polymerisati...

NA

Thermoplastic polymer material for Audio and/or optical data recording media" The present invention relates to an audio and/or optical information recording medium comprising at least one moulded disc obtained from a thermoplastic polymer material comprising, by weight: (a) 60 to 95%, of a thermoplastic resin ...

The invention relates to a method for producing mercaptans from disulfides and hydrogen by enzyme catalysis and in particular for producing methylmercaptan from dimethyl disulfide and hydrogen.

The present invention relates to a composition which comprises at least one ?? ?? amino alkanoic acid or ester and at least one alkanoic ester or acid characterised in that: the ?? ?? amino alkanoic acid or ester has formula H2N (CH2)n COOR wherein n=9 to 13 and R is an alkyl group or a hydrogen; the alkanoic ester ...

The invention relates to a method for producing L methionine by carrying out an enzyme reaction between an L methionine precursor dimethyl disulfide (DMDS) and a reducing organic compound.

The invention relates to a method for producing mercaptans from disulfides by enzyme catalysis and in particular for producing methylmercaptan from dimethyl disulfide.

The invention relates to a method for producing and purifying 2,3,3,3-tetrafluoro-1-propene using a first composition comprising 2,3,3,3-tetrafluoro-1-propene, 3,3,3- trifluoropropene (1243zf), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E), said method comprising the steps of: (a) bringing said first compositio...

The invention concerns a method for purifying 2-chloro-3,3,3-trifluoropropene (1233xf) from a first composition comprising 2-chloro-3,3,3-trifluoropropene and at least one of the compounds chosen from the group consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zd E), 1,1,1,3,3-pentafluoropropane (245fa) and 1,...

The invention relates to a method for purifying 1 1 1 2 2 pentafluoropropane (245cb) using a first composition comprising 1 1 1 2 2 pentafluoropropane and at least one of the compounds selected from the group consisting of 1 1 difluoroethane (152a) 1 1 1 2 tetrafluoroethane (134a) trans 1 3 3 3 tetrafluoro 1 propene...

The present invention concerns a method for purifying 2,3,3,3-tetrafluoro-1-propene (1234yf) from a first composition comprising 2,3,3,3-tetrafluoro-1-propene and at least one of the compounds chosen from the group consisting of 1,1-difluoroethane (152a), chloropentafluoroethane (115), and trans-1,3,3,3-tetrafluoro-...

The invention relates to a reinforced fluoropolymer plate comprising a fluoropolymer layer on one of the faces thereof and a carbon fibre sheet on the other face of same, whereby at least part of the carbon fibre sheet is impregnated with flouropolymer. The invention also relates to an acid-corrosion-resislant chemi...

The invention relates to a hydrogen peroxide aqueous solution containing a stabilizer selected from the family of substituted or unsubstituted aminopolycarboxylic acids (APCA) or salts thereof. The invention also relates to the use of such a hydrogen peroxide aqueous solution and to a method for disinfecting a packa...

The present invention relates to a linear ethylenic block copolymer comprising in each block at least one ionic hydrophilic unit, which may be different from one block to another, the said ionic hydrophilic unit being present in each block in a proportion of from 2% to 100% by weight relative to the weight of the sa...

Method of combating the corrosion caused by acids to the metal walls of a refining unit, comprising the use of a polysulphide having an alkyl radical containing between 2 and 5 carbon atoms.

The present invention relates to a copolymer based on amide units and ether units, wherein the amide units comprise a major proportion of an equimolar combination of at least one diamine and at least one dicarboxylic acid, the diamine(s) is/are mainly cycloaliphatic and the dicarboxylic acid(s) is/are mainly linear ...

The invention concerns an aqueous emulsion composition of organic peroxide comprising:  from 10 to 65% by weight of one or a plurality of organic peroxides  from 2 to 25% by weight of at least one antifreeze agent  from 0.01 to 10% by weight of at least one emulsifying agent  optionally at least one additive  water ...

The subject of the present invention is a method for the reactive vaporization of aqueous solutions of glycerol in a fluidized bed containing a reactive solid. The method of the invention makes it possible to simultaneously vaporize an aqueous solution of glycerol, to remove the impurities that are present in this s...

The present invention relates to an aqueous emulsion composition of organic peroxide without a protective colloid agent characterised in that the emulsifying agent consists of a nonionic surfactant chosen exclusively from a block copolymer comprising at least one alkylene oxide block , a block copolymer comprising a...

The present invention relates to a thermoset material with improved impact resistance comprising, by weight: •99 to 20% of a thermoset resin, •1 to 80% of an impact modifier comprising at least one copolymer chosen from copolymers comprising A-B-C and A-B blocks, in which: each block is connected to the other by mea...

The invention relates to a method for filling a receptacle (200) with carbon nanotubes from another receptacle (106) whereby the CNTs are passed from one receptacle to the other by means of a coupling (300) comprising a double-valve device (30), each valve being coupled to one of the receptacles, the said valves (31...

The invention relates to the use of at least one methyl mercapto- ester as a chain transfer agent in a method for radical emulsion polymerisation. The invention also relates to the method of radical emulsion (co)polymerisation comprising at least one such methyl mecapto -ester. The invention also relates to methyl m...

The present invention relates to N-ethylmethylamine having a very high degree of purity, that is to say very low contents of impurities commonly encountered in conventional industrial processes, and also to the process for preparing, on an industrial scale, high-purity N-ethylmethylamine.

A composition comprising a copolyamide and a crosslinked polyolefin. The present invention relates to a composition comprising at least one semi aromatic polyamide and at least one crosslinked polyolefin wherein the crosslinked polyolefin is obtained from at least one product (A) comprising an unsaturated epoxide an...

The present invention relates to a novel composition, having a non-therapeutic purpose, that contains at least one POM (PolyOxyMethylene dialkyl ether) and/or at least one dialdehyde acetal, and also at least one biocidal agent and optionally at least one pro-penetrating agent. It also relates to the topical use of ...

The invention relates to a multilayer tube comprising (in the order starting from the inside to the outside of the tube) layers arranged one on top of the other: an optional layer L1 comprising at least one fluorinated polymer, preferably a PVDF; a layer L2 comprising at least one functionalized PVDF, obtained by ra...

The neutralizing agent for use in a paint, in a white paint base, in a pigment concentrate, of at least one associative neutralizing agent comprising at least one neutralizing group N and at least one nitrogen-containing associative group A, connected to one another by at least, and preferably, one (1) "spacer" grou...

The invention relates to a fluoropolymer solvent System including 50 wt % to 99.9 wt % of a composition (A) including dimethyl sulfoxide, and 0.1 wt % to 50 wt % of a composition (B) including at least one ketone. The invention also relates to the solutions including said solvent System and said fluoropolymer, as w...

The present invention relates to a process comprising at least one reactive trituration step which consists in placing an oil cake comprising from 3% to 30% oil in contact with an anhydrous light alcohol and an alkaline catalyst under temperature and time conditions that are sufficient to allow the extraction and...

The subject matter of the invention is a copolymer obtained by free radical copolymerization of vinylidene fluoride with trifluoroethylene and of at least a third monomer the third monomer having a molar mass greater than 0 g/mol and corresponding to the formula: in which R is a hydrogen atom or a fluorine atom and ...

The invention relates to a method for synthesizing ? amino alkanoic acids or the esters thereof from natural unsaturated fatty acids passing through an intermediate ? unsaturated nitrile compound. The method of the invention is simple to implement and relative to known methods avoids the environmental constraints an...

The present invention relates to the manufacture of dialkylaminoalkyl (meth)lacerate in particular N N dimethylaminoethyl lacerate by transmogrification reaction of an alkyd (meth)lacerate with an amino alcohol and the subject matter thereof is more particularly a process for recovering the heavy by products generat...

The invention relates to a method for synthesising a block copolymer alloy including at least one rigid polyamide block PA, including the steps of: a) producing said block copolymer; b) adding, during step a) and to at least a portion of said block copolymer, 0.1 to 30 wt % of at least one organic salt in the molten...

The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide sulphur and/or hydrogen su...

The invention relates to a catalyst material for preparing nanotubes, especially carbon nanotubes, said material being in the form of solid particles, said particles comprising a porous substrate supporting two superposed catalytic layers, a first layer, directly positioned on the substrate, comprising at least one ...

The present invention relates to the production of (meth)acrylic acid. The subject thereof is more particularly the implementation of a step of condensing the water contained in a recycled gas effluent and/or in the air feed, in a (meth)acrylic acid production process which includes a process for purifYing a reac...

The present invention relates to a composition comprising: (a) from 30 to 70% by weight of a mixture of benzyltoluene and dibenzyltoluene and (b) from 70 to 30% by weight of at least one compound chosen from the C4 C8 aromatic compounds enclosing two benzene rings condensed or bonded to each other by a bond or by a ...

The invention primarily relates to a method for welding at least two parts (2, 3) comprising a thermoplastic material and having respective surfaces (10, 11) to be welded, which comprises: inserting an insert (4) between the surfaces (10, 11) to be welded of the two parts (2, 3); generating heat by means of said ins...

The invention relates to a composition comprising at least one mixture of organic peroxides containing 1,3-1,4-bis(tert-butylperoxy-isopropyl)benzene and at least one second organic peroxide having a half-life temperature at one minute ranging from 130 to 170°C. The invention also relates to the use of said composit...

The present invention relates to a compound of formula (I): in which:  the R1 and R2 groups which may be identical or different are independently of one another a saturated or unsaturated linear branched or cyclic hydrocarbon group comprising from 1 to 15 carbon atoms preferably from 1 to 10 carbon atoms;  the R3 an...

The present invention relates to a weakly corrosive and weakly coloured sulfonic acid, with APHA colour index less than 20, comprising chlorides and nitrites in a chloride/sulfonic acid molar ratio of between 1 ppm and 200 ppm, and a nitrite/sulfonic acid molar ratio of between 200 ppm and 6000 ppm, with the limits ...