The invention relates to the field of the preparation of aqueous compositions comprising rheology-modifying agents, including the preparation of cosmetic or detergent aqueous compositions having thickening and clarity of improved properties as well as good properties suspensi lowing.

In particular, the invention relates to a rheology modifier which is a copolymer obtained by polymerization of at least one crosslinking monomer with at least one anionic monomer comprising at least one ethylenic unsaturation Polymerization sand and at least one hydrophobic nonionic monomer comprising at least one polymerizable ethylenic unsaturation.

Known rheology modifiers, also called thickeners or viscosity agents. Generally, they are present in the cleaning compositions, for example in care compositions or personal hygiene, including cosmetic compositions, or in care compositions, including detergents. Usually, these compositions are rich in surfactant compounds.

These agents influencing the rheological properties of the formulation, especially the viscosity, as well as optical or aesthetic properties, such as clarity. These agents also influence the ability to suspend and stabilize the particles in the formulation.

Among the rheology modifiers commonly used in aqueous formulations that may be mentioned the copolymers soluble or swellable in an alkaline medium (ASE polymers for Alkali-Soluble or Alkali-Swellable Emulsions Emulsions). May also be mentioned the copolymers soluble or swellable in an alkaline medium and hydrophobically modified (HASE polymers for Hydrophobically modified Alkali-Soluble Emulsions or Hydrophobically modified Alkali-Swellable Emulsions).

Also known are aqueous compositions comprising copolymers ASE or HASE copolymers as rheology modifiers.

For these aqueous compositions, one seeks in particular to improve their properties or performance for a wide range of pH. In particular, it seeks to provide aqueous compositions having high clarity, good properties in terms of thickening effect and good properties suspensi lowing.

The viscosity control and obtaining aqueous compositions in the form of a continuous and clear phase are particularly desired, in particular for a wide range of pH.

Thus, the properties and performance of aqueous compositions should be implemented at both pH values ​​of acid at neutral or basic pH values.

An aqueous composition has good suspensivantes properties or good suspending power when it is capable of maintaining particles suspended in the continuous phase. This ability must last over time to obtain stable aqueous compositions, for example during storage.

Generally, suspensivantes properties are evaluated by applying an application test suspension for determining the value of the elastic modulus G ', the value of Tan (δ) and the value of the yield strength of the aqueous composition comprising a rheology modifier.

Generally, the particles to be suspended in the continuous phase of the aqueous composition are solid bodies, solid or hollow. These particles to be suspended may also be immiscible liquids entities with the continuous phase of the aqueous composition or encapsulated body or gaseous substance that can be characterized by shapes, textures, structures, compositions, colors and different final properties.

For information, include exfoliating particles such as polyethylene particles, crushed fruit shells, pumice stones. Mention may also be nourishing particles, for example spheres of collagen and the nacrantes particles, e.g., titanium mica, glycols di stearates, or aesthetic particles, for example air bubbles, flakes, optionally pigments.

Usually, the particle suspension can be quite variable size. For example, air bubbles may have a size of 1, 2 or 3 mm.

The clarity or clearness aqueous compositions can be evaluated by measuring their transmittance, usually expressed as a percentage. A composition is considered clear or clear if it has a transmittance for a 500 nm wavelength, at least 60%, preferably at least 70% and even more preferably at least 80%.

FR 3000085 discloses the preparation of an aqueous composition for shower gel comprising particles suspended in a clear continuous phase. The crosslinking compound used is ethylene glycol dimethacrylate (EDMA) or trimethylolpropane trimethacrylate (TMP-TMA).

The document FR 1363955 Spaghetti sin of the esters of monoacides aliphatiques carboxyliques α, β-éthyléniques homopérillique and alcohol.

The document US 2004 0213892 discloses a polymer coated with a surface-active nitrogen-containing non-ionic. EP 2780382 discloses a polymeric latex emulsion used as a thickening agent.

EP 2620466 relates to a method of heat treating water-absorbing polymer particles. US 2016 0083532 describes the preparation of water-absorbing polymer particles.

The rheology modifiers of the prior art and aqueous compositions of the state of the art including the not always satisfactory and lead to many problems these desired properties.

There is therefore a need for the expert to have rheology-modifying agents with improved properties, in particular properties present in aqueous compositions.

The invention provides a solution to any or all of the problems with rheology modifiers stall technique.

Thus, the invention provides a copolymer (P1) obtained by polymerization reaction:

(A) at least one anionic monomer comprising at least one polymerizable ethylenic unsaturation; and

(B) at least one hydrophobic nonionic monomer comprising at least one polymerizable ethylenic unsaturation; and

(C) at least one monomer of formula (I):

in which :

● R 1 independently represents H or CH 3 ;

● R 2 is independently -C (H) = CH 2 , -C (CH 3 ) = CH 2 -C (H) -C (H) C (O) OH, -C (H) = C (H) CH 3 -C {= CH 2 } CH 2 C (C)) OH, -CH 2 C (CH 2 ) C {O) OH;

● L l independently represents an ethylene group, prcpylène or butylene;

● n independently represents 0 or an integer or decimal number from 1 to 30.

According to the invention, Get out of the polymerization reaction, the monomers may be introduced separately or as one or more mixtures of these monomers.

Preferably " the monomers are introduced in the form of a mixture.

Preferably according to the invention, the anionic monomer (a) is an anionic monomer comprising a polymerizable vinyl group and at least one carboxylic acid function. More preferably, it is a monomer selected from acrylic acid, methacrylic acid, maleic acid, itaconic acid, crotonic acid, acrylic acid salt, a salt of methacrylic acid, a maleic acid salt, an itaconic acid, a crotonic acid salt, a salt of cinnamic acid, and mixtures thereof.

More preferably according to the invention, the anionic monomer (a) is selected from acrylic acid, methacrylic acid, an acrylic acid salt, methacrylic acid salt and mixtures thereof. Even more preferably according to the invention, the anionic monomer (a) is selected from acrylic acid, methacrylic acid and mixtures thereof. The monomer (a) is more particularly preferred is methacrylic acid.

Also preferably according to the invention, the anionic monomer (a) is implemented in an amount of at least 20 mol%, preferably 25 to 60 mol%, especially from 30 to 55 mol%, relative the total molar amount of monomers.

Preferably according to the invention, the hydrophobic non-ionic monomer (b) is a hydrophobic nonionic monomer comprising a polymerizable vinyl function, in particular a monomer which is not an associative monomer.

Advantageously, the hydrophobic non-ionic monomer (b) is selected from acrylic acid esters, methacrylic acid esters, acrylic acid amides, methacrylic acid amides, nitriles of acrylic acid , nitriles of methacrylic acid, or from acrylonitrile, styrene, methylstyrene and diisobutylene.

Preferably, the hydrophobic non-ionic monomer (b) is selected from acrylates of C 1 -C 8 -alkyl, methacrylates of C 1 -C 8 -alkyl, maleates, C 1 -C 8 -alkyie itaconates C 1 -C 8 -alkyl, crotonates C 1 -C 8-alkyl, cinnamates Ci-Ce-alkyl and mixtures thereof, preferably methyl acrylate, racrylate ethyl acrylate, butyl acrylate, 2-ethyl-hexyl, methyl methacrylate, ethyl methacrylate, butyl methacrylate and mixtures thereof. Particularly preferably, the hydrophobic non-ionic monomer (b) is selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate and mixtures thereof. The hydrophobic non-ionic monomer (b) more preferred is ethyl acrylate.

Also preferably according to the invention, the hydrophobic non-ionic monomer (b) is implemented in an amount of 30 to 80 mol%, preferably 35 to 75%

molar, more preferably from 45 to 70 mol%, relative to the total molar amount of monomers.

Particularly preferably, the copolymer (P1) can be prepared from anionic monomer (a) chosen from acrylic acid, methacrylic acid and mixtures thereof, preferably methacrylic acid, and hydrophobic nonionic monomer ( b) selected from methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate and mixtures thereof, preferably ethyl acrylate.

In addition to the monomers (a) and (b), the preparation of the copolymer (P1) according to the invention uses at least one monomer of formula (I). The monomer of formula (I) comprises at least two ethylenic unsaturations Polymerization sands. The monomer of formula (I) is preferably a crosslinking monomer, more preferably: a monomer which is not an associative monomer. Particularly Essentially, the monomer of formula (I) is a crosslinking monomer having two polymerizable ethylenic unsaturations have different properties which impart specific properties to the crosslinking monomer of formula (I).

Preferably, the preparation of the copolymer (P1) according to the invention implements one or two monomers of formula (I), in particular a monomer of formula (I).

Pour le monomère (c), L1 représente indépendamment un groupement éthylène, propylène ou butylène, à savoir respectivement un groupement CH2-CH2, CH(CH3)-CH2 et CH(CH2CH3)-CH2.

De manière préférée selon l'invention, le monomère (c) est un composé de formule (I) dans laquelle n représente un nombre entier ou décimal allant de 1 à 18, de 1 à 15 ou de 2 à 16 ou encore de 2 à 12.

Particularly preferably according to the invention, the monomer (c) is a compound (Cl) of formula (I) wherein R 1 is H; R 2 is -C (H) = CH 2 ; L 1 is CH 2 -CH 2 and n is 10 (CAS number 99742-80-0). So

also particularly preferred according to the invention, the monomer (c) is a compound (c2) of formula (I) wherein R 1 is H; R 2 is -C (CH 3 ) = CH 2; L 1 is CH 2 -CH 2 and n is 3.5 (CAS number 121826-50-4).

Also preferably according L` invention, the monomer (c) is a compound (c3) of formula (I) wherein R 1 is H; L 1 is CH 2 -CH 2; R 2 is -C (CH 3 ) = CH 2 and n is 10 (CAS number 121826-50-4). These compounds of formula (I) are known as such and can be prepared according to methods described in the prior art or according to methods that can be adapted to methods described in the prior art.

Also preferably according to the invention, the monomer (c) is implemented in an amount of less than 5 mol%, preferably 0.01 to 5 mol% and more preferably from 0.02 to 4% molar or from 0.02 to 2 mol% or from 0.04 to 0.5 mol% or from 0.04 to 0.25% mole, of monomer (c) with respect to the total molar amount of monomers.

The monomer (c) is generally known as such or may be prepared using the preparation methods described in US 2006-0052564.

According to the invention, the copolymer (P1) is prepared by a polymerization reaction comprising the implementation of monomers (a) and (b) and monomer (c) of formula (I). The copolymer (P1) can be prepared from these monomers alone (a), (b) and (c) of formula (I).

The copolymer (P1) can also be prepared from these three types of monomers in combination with other monomers. Thus, besides the monomers (a) and (b) and the monomer (c) of formula (I), the polymerization reaction to prepare the copolymer (P 1) can implement one or more other monomers.

Advantageously, the copolymer (P1) can be prepared by a polymerization reaction involving also implement at least one nonionic monomer (d), different from the monomer (b) comprising a polymerizable vinyl function, and

hydrocarbon chain comprising at least 10 carbon atoms. According to the invention, the nonionic monomer (d) is preferably selected from:

• a monomer (d 1) comprising a vinyl function Polym ensable and a hydrocarbon chain C 12 -C 36 ;

· A monomer (d2) comprising a vinyl function Polym ensable a hydrocarbon chain C 12 -C 36 and from 1 to 150, preferably from 15 to 50 and more preferably from 20 to 30, alkyleneoxy groups.

For the non-ionic monomer (d2), the preferred oxy-alkylene groups are ethoxy moieties (EO), propoxy (PO) and butoxy (BO), especially the ethoxy (EO). A nonionic monomer (d2) Preferred is a compound of formula (Π):

T1-(CH2CH2O)ffl-(CH2CH(CH3)O)p-(CH2CH(CH2CH3)O)q-T2

(II)

in which :

• T 1 independently represents a polymerizable vinyl group;

T • 2 independently represents:

o a hydrocarbon chain comprising at least 10 carbon atoms, preferably a hydrocarbon chain C 12 -C 36 ; or

o a hydrocarbon chain comprising at least 10 carbon atoms, preferably a hydrocarbon chain C 12 -C 36 and at least one heteroatom selected from O, S, N and P; or

• m, p and q, identical or different, independently represent an integer or decimal number from 0 to 150, the sum of m, p and q are non-zero.

Preferably, T 1 represents a polymerizable vinyl functional group chosen from a vinyl group, a methylvinyl group, an acrylate group, a methacrylate, an allyl group, a methallyl group.

As the compound (d2) particularly include the compound (d2-l) of formula (H) wherein T 1 represents a -OC (O) C (CH 3 ) = CH 2 , T 2 represents a branched hydrocarbon chain having 16 carbon atoms (2-hexyldécanyl), m is 25 and p and q represent 0.

Also advantageously, the polymerization reaction can implement from 0.01 to 10 mol% of monomer (d) with respect to the total molar amount of monomers. Preferably, the polymerization reaction can implement from 0.02 to 5 mol% or from 0.02 to 2 mol%, monomer (d) with respect to the total molar amount of monomers.

Advantageously, the copolymer (P1) can be prepared by a polymerization reaction also using at least one ionic monomer or nonionic (e), different from the monomer (b). Preferably according to the invention, the ionic monomer or nonionic (e) is selected from:

- sulfonic acid or 2-acrylamido-2-methylpropane salt thereof;

- telomeres, preferably dimers, trimers or tetramers, unsaturated acrylic acid;

- monomer of formula (Πl '):

in which :

● R 6 , R 7 and R 8 , identical or different, independently represent H or C¾;

● R 9 represents H or CH 3 ;

● L 2 independently represents a direct bond or a group selected from O, C (= O) 0, CH 2 CH 2 and CH 2 ;

● L 3 independently represents a direct bond or 1 to 150, preferably from 15 to 50 and more preferably from 25 to 30, alkyleneoxy groups.

For the ionic monomer or nonionic (e), the preferred oxy-alkylene groups are ethoxy moieties (EO), propoxy (PO) and butoxy (BO), especially the ethoxy (EO).

According to the invention, ethoxy (EO) is a residue -CH 2 -CH 2 -O, propoxy (PO) is an ethoxy group substituted by a methyl radical on one of the carbon atoms in lieu of a hydrogen atom and a butoxy group (BO) is an ethoxy group substituted by an ethyl radical on one of the carbon atoms to replace a hydrogen atom.

According to the invention, among the monomers (e) of formula (IV) preferred, are known:

• HEMA or hydroxyethyl methacrylate which is a compound of formula (IV) wherein R 6 , R 7 and R 9 are H, R 8 is CH 3 , L 2 is C (O) 0 and V represents an ethyleneoxy group; and

• HP MA or hydroxypropyl methacrylate which is a compound of formula (IV) wherein R 6 , R 7 and R 9 are H, R 8 is CH 3 , L 2 is C (O) 0 and L 3 represents a propylene oxy;

• A HP or hydroxypropyl acrylate which is a compound of formula (IV) wherein R 6 , R 7 , R 8 and R 9 are H, L 2 is C (O) 0 and L 3 represents a propyleneoxy group.

Also advantageously, the polymerization reaction can implement from 0.01 to 25 mol% of monomer (e) relative to the total molar amount of monomers. Preferably, the polymerization reaction can implement from 0.02 to 15 mole%, or from 0.02 to 10 mol% of monomer (e) relative to the total molar amount of monomers.

Advantageously, the copolymer (P1) can be prepared by a polymerization reaction also using at least one monomer (f). The monomer (f) is preferably a crosslinking monomer, hydrophilic, hydrophobic or amphiphilic and is generally a compound comprising more ethylenic unsaturations. It is distinct from the monomer of formula (I) according to the invention. The monomer (f) may be im compound selected from:

• a compound of formula of formula (VI):

in which :

- L represents CH 2 , CH 2 monoalkoxyîé or CH 2 polyalkoxylated;

- Q represents a direct bond or C (O);

- R représente -C(H)=CH2, -C(CH3)=CH2, -C(H)=C(H)C(O)OH, -C(H)=C(H)CH3, -C(-CH2)CH2C(O)()H, -CH2C(-CH2)C(O)OH, Q3OQ4OC(())C{CH3)-CH2 ou Q3OQ4OC(O)C(H)==CH2 ;

- Q 3 represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-1, 3-diisocyanate (TDI) and isophorone diisocyanate (IPDI);

- Q 4 is CH 2 , CH 2 -CH 2 , CH 2 monoalkoxyîé, CH 2 -CH 2 monoalkoxyîé, CH. 2 polyalkoxylated or CH 2 -CH 2 polyalkoxylated;

● a compound of formula (VI A):

in which :

- L represents CH 2 , CH 2 monoalkoxyîé or CH 2 polyalkoxylated;

- R représente -C(H)==CH2, -C(CH3)=CH2, -C(H)-C(H)C(O)OH, -C(H)=€(H)CH3, -C(-CH2)CH2C(O)OH, -CH2C(=CH2)C(O)OH, Q3OQ4OC(O)C(CH3)=CH2 ou Q3OQ4OC(O)C(H)= :H2 ;

- Q 3 represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-l, 3-diisocyanate (TDI) and isophorone diisocyanate (EPDI);

- Q 4 is CH 2 , CH 2 -CH 2 , CH 2 monoalkoxylé, CH 2 -CH 2 monoalkoxyié, CH 2 polyalkoxylated or CH 2 -CH 2 polyalkoxylated;

● a compound of formula (VI-B):

in which :

- L represents CH 2 , CH 2 monoalkoxylé or CH 2 polyalkoxylated;

- R représente -C(H)=CH2, -C(CH3)=CH2, -C(H)=C(H)C(O)OH, -C(H)=C(H)CH3, -C(=CH2)CH2C(O)OH, -CH2Q=CH2)C(O)OH, Q3OQ4OC(O)C(CH3)==CH2 ou Q3OQ4OC(O)C(H)=CH2 ;

- Q 3 represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-l, 3-diisocyanate (TDI) and isophorone diisocyanate (IPDI);

- Q 4 is CH 2 , CH 2 -CH 2 , CH 2 monoalkoxylé, CH 2 -CH 2 monoalkoxylé, CH 2 polyalkoxylated or CH 2 -CH 2 polyalkoxylated.

The monomer (f) may also be selected from the di (meth) acrylates such as di (meth) acrylate of polyalkylene glycol, in particular di (meth) acrylate, polypropylene glycol di (meth) acrylate of ethylene glycol, di (meth) acrylate, polyethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, 1,6-butylene glycol di ( meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1, 9-nonanediol, but also the 2 ^ ,bis (4- (acryloxy-propyleoxyphényl)) propane, 2,2'-bis (4- (acryloxydiéthoxy-phenyl)) propane and zinc acrylate; tri compounds (meth) acrylates such as trimethylolpropane tri (meth) acrylate and tri (meth) trimethylolpropane acrylate, ethoxylated trimethylolpropane tri (meth) trimethylol ethane acrylate, trimethylolpropane tri (meth) pentaerythritol acrylate and tri (meth) acrylate tetramethacrylate; compounds tetra (meth) acrylates such as pentaerythritol tetra (meth) acrylate ditriméthylolpropaiie, tetra (meth) acrylate and tetramethylolmethane tetra (meth) acrylate of pentaerythritol; the compounds hexa (meth) acrylates such as one hexa (meth) acrylate of dipentaerythritol; compounds penta (meth) acrylates such as penta (meth) acrylate of dipentaerythritol; the allyls compounds such as allyl (meth) acrylate, diallylphthalate, the diallyl itaconate, diallyl fumarate, diallyl maleate; polyallyls the ethers of sucrose having 2 to 8 groups per molecule, the polyallyls ethers of pentaerythritol such as pentaerythritol diallyl ether, pentaerythritol tri garlic yl ether and pentaerythritol tetraallyl ether; polyallyls the ethers of trimethylolpropane diallyl ether such as rriméthylolpropane and ether triallyl trimethacrylate. Other polyunsaturated compounds include divinyl glycol, divinyl benzene, methylenebisacrylamide and the divinylcyclohexyl. polyallyls the ethers of trimethylolpropane diallyl ether such as rriméthylolpropane and ether triallyl trimethacrylate. Other polyunsaturated compounds include divinyl glycol, divinyl benzene, methylenebisacrylamide and the divinylcyclohexyl. polyallyls the ethers of trimethylolpropane diallyl ether such as rriméthylolpropane and ether triallyl trimethacrylate. Other polyunsaturated compounds include divinyl glycol, divinyl benzene, methylenebisacrylamide and the divinylcyclohexyl.

The monomer (f) may also be prepared by reacting estérifi cation of a polyol with an unsaturated anhydride such as L` acrylic anhydride, methacrylic anhydride, maleic anhydride or itaconic anhydride. For the monomer (f), may also be used compounds selected from polyhaloalkanols such as 1,3-dichloroisopropanol and 1, 3-dibromoisopropanol; the haloépoxyalkanes such as l`épichlorohydrine, epibromohydrin, 2-methyl epichlorohydrin and l`épiiodohydrine; polyglycidyl ethers such as 1,4-butanediol diglycidyl ether, glycerol-l, 3-diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, polypropylene glycol diglycidyl ether,

The monomer (f) may also be selected from Réti exilants trifunctional. It can be in particular tri (meth) acrylate (TMPTA) or trimethylolpropane tri (meth) acrylate, ethoxylated trimethylolpropane (such as TMPTA e.g., 30E).

The monomer (f) may also be chosen from tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethoxylated trimethylolpropane di (meth) acrylate of ethylene glycol, methylenebisacrylamide, diallyl phthalate, diallyl maleate and mixtures thereof.

The monomer (f) may also be a mixture of two different monomers, e.g. EGDCPEA (ethylene glycol dicyclopentenyl ether acrylate) and TMPTA TMPTA or EGDCPEA and 30E.

According to the invention, the monomer (f) is preferably selected from a compound of formula (V), trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate Iriméthacrylate ethoxylated ethoxylated trimethylolpropane triacrylate, dimethacrylate ethylene glycol, ethylene glycol diacrylate, mémylènebisacrylamide, the diallylphthalate, diallyl maleate, and mixtures thereof.

WE CLAIM

1. A copolymer (P1) obtained by polymerization reaction:

(A) at least one anionic monomer comprising at least one msataration émylénique poiyméri sand; and

(B) at least one hydrophobic nonionic monomer comprising at least one unsaturation éthyiénique polymérisabîe; and

(C) at least one monomer of formula (I);

in which :

● R 1 independently represents H or CH 3 ;

● R 2 is independently -C (H) = CH 2 -C (CH 3 ) = CCH 2 -C (H) = C (H) C (O) OH > -C (H) = C (H) CH 3 , -C (= CH 2 ) CH 2 C (O) OH > -CH 2 C (= CH 2 ) C (0) OH;

● L 1 independently represents an ethylene group, propylene or butylene;

● n independently represents 0 or an integer or decimal number ranging from I to 30.

2. A copolymer according to claim 1

● for which the anionic monomer (a) is an anionic monomer comprising a function vinyhque polymérisabîe and at least one carboxylic acid function, preferably a monomer selected from acrylic acid, methacrylic acid, maleic acid, itaconic, crotonic acid, acrylic acid salt, methacrylic acid salt, maleic acid salt, a salt of itaconic acid, a salt of crotonic acid, cinnamic acid salt, and mixtures thereof; or

● obtained by polymerization reaction using at least 20 mol%, preferably 25 to 60 mol%, especially from 30 to 55 mole%, anionic monomer (a) relative to the total molar amount of monomers.

3. Copolymer according to one of claims 1 and 2

• in which the hydrophobic nonionic monomer (b) is a hydrophobic nonionic monomer comprising a vinyl function polymérisabîe of

preferably a monomer selected from acrylates of C 1 -C 8 -alkyl, methacrylates of C 1 -C 8 -alkyl, maleates, C 1 -C 8 -alkyl, itaconates, C 1 -C 8 -alkyl, the crotonates of C 1 -C 8 -alkyl, cinnamates of C 1 -C 8 alkyl and mixtures thereof, preferably methyl acrylate, ethyl acrylate, butyl acrylate, 2 ethyl-hexyl, methyl methacrylate, ethyl methacrylate, butyl methacrylate and mixtures thereof; or

• obtained by polymerization reaction employing from 30 to 80 mol%, preferably from 35 to 75 mol% more preferably 45 to 70 mole%, hydrophobic nonionic monomer (b) with respect to the total molar amount of monomers.

4. Copolymer according to one of claims 1 to 3

• in which the monomer (c) is selected from a compound (Cl) of formula (I) wherein R 1 is H; R 2 is -C (H) = CH 2 ; L 1 is CH 2 -CH 2 and n is 10; a compound (c2) of formula (I) wherein R 1 is H; R 2 is -C (CH 3 ) = CH 2 L 1 is CH 2 -CH 2 and n is 3.5; a compound (c3) of formula (1) wherein R 1 is H; L 1 is CH 2 -CH 2; R2 is -C (CH 3 ) = CH 2 and n is 10; or

• obtained by polymerization reaction employing less than 5%, preferably 0.01 to 5 mol% and more preferably from 0.02 to 4% or from 0.02 to 2 mol% or from 0.04 to 0.5 mole% 0.04 to 0.25% mole, of monomer (c) with respect to the total molar amount of monomers.

5. Copolymer according to one of claims 1 to 4 obtained by polymerization reaction also using at least one nonionic monomer (d), different from the monomer (b) comprising a polymerizable vinyl group and a hydrocarbon chain comprising at least 10 carbon atoms, preferably selected from:

• a monomer (d 1) having a polymerizable vinyl function, and a hydrocarbon chain in Q2-C36;

• a monomer (d2) comprising a polymerizable vinyl function, a hydrocarbon chain Ci2-C36 and 1 to 150, preferably from 15 to 50 and more preferably from 20 to 30 alkyleneoxy groups, preferably a monomer (d2 ) of formula (II):

T1-(CH2CH2O)ra-(CH2CH(CH3)O)p-(CH2CH(CH2CH3)O)q-T2

(II)

in which ;

o T 1 independently represents a polymerizable vinyl group; o T 2 is independently:

● a hydrocarbon chain comprising at least 10 carbon atoms, preferably a hydrocarbon chain C 12 -C 36 ; or

● a hydrocarbon chain comprising at least 10 carbon atoms, preferably a hydrocarbon chain C 12 -C 36 and at least one heteroatom selected from O, S, N and P; or

om, p and q, identical or different, independently represent an integer or decimal number from 0 to 150, the sum of m, p and q are non-zero;

preferably obtained by polymerization reaction employing from 0.01 to 10 mol% or from 0.02 to 5 mol% or from 0.02 to 2 mol%, monomer (d) with respect to the total molar amount of monomers.

6. Copolymer according to one of claims 1 to 5 obtained by polymerization reaction also using at least one ionic monomer or nonionic (e), different from the monomer (b) selected from:

- sulfonic acid or 2-acrylamido-2-methylpropane salt thereof;

- telomeres, preferably dimers, trimers or tetramers, unsaturated acrylic acid;

- monomer of formula (III):

in which :

● R 3 , R 4 and R 5 , identical or different, independently represent H or CH 3 ;

● r is independently 1, 2 or 3;

the monomer of formula (TV), including HEMA, MA HP and HP A:

● R 6 , R 7 and R 8 , identical or different, independently represent H or CH 3 ;

● R 9 is H or BLTC;

● L 2 independently represents a direct bond

group selected from O, C (O) 0, CH 2 CH 2 and CH 2 ;

● L 3 independently represents a direct bond or 1 to 150, preferably from 15 to 50 and more preferably from 25 to 30, alkyleneoxy groups;

preferably obtained by polymerization reaction employing from 0.01 to 25 mol% or from 0.02 to 15 mole%, or from 0.02 to 10 mol% of monomer (e) relative to the total molar amount of monomers.

7. Copolymer according to one of claims 1 to 6 obtained by polymerization reaction also using at least one further monomer (f), preferably selected from a compound of formula (V), trimethylolpropane trimethyl olpropane triacrylate trimethacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, ethoxylated ethylene glycol dimethacrylate, ethylene glycol diacrylate, methylenebisacrylamide, diallylphthalate, diallyl maleate, and mixtures thereof:

(V)

in which :

• R 10 is independently H or CH 3 ;

• L 4 independently represents a C 1 -C 20 linear or branched alkylene;

● t représente the nâépsnàammmî 0 ois a nombre entier below de 30, par exemple de to 20, and de particulier à 15, notamment de 10;

preferably obtained by polymerization reaction employing less than 5% molar, preferably from 0.01 to 4 mol%, especially from 0.02 to 2 mol%, in particular 0.04 to 1% molar, monomer (f) with respect to the total molar amount of monomers.

8. Copolymer according to one of claims 1 to 7 obtained by polymerization reaction also using at least one other monomer (g) of the formula

● a compound of formula of formula (VI):

in which :

- L represents CH 2 , CH 2 monoalkoxylé or CH 2 polyalkoxyié;

- Q represents a direct bond or C (O);

- R représente -C(H)=CH, -C(CH3)=:CH2, -CXH)-C(H)C(O)OH, -C(H)-C(H)CH3, -C(=CH)2CH2C(O)QH, -CH2C(=CH2)C(G)OHs Q3OQ4OC(O)C(CH3)=CH2 ou Q,OQ4OC(O)C(H)-=CH2 ;

- Q s represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-1, 3-diisocyanate (TDI) and isophorone diisocyanate (IP ID);

- Q 4 is CH 2 , CH 2 -CH 2 , CH 2 monoalkoxylé, CH 2 -CH 2 monoalkoxylé, CH 2 polyalkoxyié or CH 2 -CH 2 polyalkoxyié;

• a compound of formula (V-A):

in which :

L represents CH 2 , CH 2 monoaîkoxylé or CH 2 polyalkoxylated;

R is -C (H) = CH 2 , -C (CH 3 ) = CH 2 , -C (H) = CCH) C (O) OH 5

-C(H)=C(H)CH3, -C(=CH2)CH2C(O)OH, -CH2C(-CH2)C(O)OH,

Q3OQ4OC(O)€(€H3)==CH2 ou Q3OQ4OC(O)C(H)= :H2 ;

Q 3 represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-1, 3-diisocyanate (TDI) and i sophorone diisocyanate

(SPDI);

Q 4 represents CI¾, CH 2 -CH 2 , CH 2 monoaîkoxylé, CH 2 -CH 2 monoaîkoxylé, CH 2 polyalkoxylated or CH 2 -CH 2 polyalkoxylated;

a compound of formula (VI-B):

in which ;

- L represents CH 2 , CH 2 monoaîkoxylé or CH 2 polyalkoxylated;

- R représente -C(H)=CH2 -C(CHj)= CH2, -C(H) C(H)C(O)OH, -0(H)= (Ή)CΗ3, -C=CH2)CH2C(O)OH, -CH2C(-CH2)C(O)OH; Q3OQ4OC(O)C(CH3)=CH2 ou Q3OQ4OC(())C(H)-C:H2 ;

Q 3 represents a divalent residue of an asymmetrical diisocyanate compound, preferably selected from tolyl-1, 3-diisocyanate (ydi) and isophorone diisocyanate

(Etc);

- Q 4 is CH 2 , CH 2 -CÛ2, CH 2 monoaîkoxylé, CH 2 -CH 2 monoaîkoxylé, CH 2 polyalkoxylated or CH 2 -CH 2 polyalkoxylated;

preferably obtained by polymerization reaction employing less than 5% molar, preferably from 0.01 to 4 mol%, in particular 0.02 to 4% molar or from 0.02 to 2 mol%, in particular of from 0.04 to 1 mol% of monomer (g) relative to the total molar amount of monomers.

9. The use for the preparation of a corx> lymère, less than 5 mol% relative to the total molar amount of monomers, of at least one monomer of formula (I):

in which :

● R 1 independently represents H or CH 3 ;

● R 2 is independently -C (% HH, -C (CH 3 ) = CH 2 , -C (H) = C (H) C (O) OH, -C (H) -C (H) CH 3 , -C (CH 2 ) CH 2 C (O) OH > -CH 2 C (= CH2) C (O) OH;

● L 1 independently represents an ethylene group, propylene or butylene;

● n independently represents 0 or an integer or decimal number from 1 to 30.

10. A method (1) for preparing a eopoiymere (P1) by polymerization reaction:

(A) at least one anionic monomer comprising at least one insatu ration éthyiénique Polymerization sand, preferably an anionic monomer comprising a vinyl function Polymerization sand and at least one carboxylic acid function; and

(B) at least one hydrophobic nonionic monomer comprising at least one polymerizable unsaturated éthyiénique, preferably a hydrophobic nonionic monomer comprising a polymerizable vinyl group; and

(C) at least one monomer of formula (I):

in which :

• R 1 is independently H or CH 3 ;

• R 2 is independently -C (H) -CH 2 , -C (CH 3 XCH, 2 -C (H) = C (H) C (O) Oi 1, -C (H) = C (H) CH 3 , -C (= CH 2 ) CH 2 C (0) OH, - CH 2 C (= CH) 2 C (O) OH;

• L 1 independently represents a group éihylène, propylene or butylene;

● n independently represents 0 or an integer or decimal number ranging from I to 30.

11. A method (2) for preparing a eopoiymere (P2) by polymerization reaction as defined in claim 10 and further comprising the implementation, during the polymerization reaction, a copolymer (P1) obtained beforehand by polymerization reaction according to claims 1 to 8.

12. The copolymer (P2) obtainable by the method (2) of claim 11, preferably a copolymer (P2) or multiphasic which comprises a heart comprising a first copolymer (P1), totally or partially covered by a second copolymer (P1), the same or different from the first copolymer (P1).

13. The copolymer (P2) according to claim 12 wherein the weight ratio 1 copolymer (P 1) / 2 copolymer (P 1) is between 95/5 and 45/55, especially between 60/40 and 90 / 10.

14. An aqueous composition comprising at least one copolymer (P1) according to one of claims 1 to 8 or at least one copolymer (P2) according to one of Claims 12 and 13.

15. A cosmetic composition comprising:

• at least one copolymer (P1) as claimed in one of claims 1 to 8; or

• at least one copolymer (P2) according to one of claims 12 and 13; or

• at least one copolymer (P1) according to one of claims 1 to 8 and at least one copolymer (P2) according to one of claims 12 and 13; or

• at least one aqueous composition as defined in claim 14.

16. Cosmetic composition according to Claim 15, the pH is from 3 to 9, preferably 3 to 7, more preferably from 4 to 7.

17. Use for the preparation of an aqueous composition according to claim 14 or for the preparation of a cosmetic composition according to one of claims 15 and 16

• of at least one copolymer (P1) as claimed in one of claims 1 to 8; or

• of at least one copolymer (P2) according to one of claims 12 and 13; or

• of at least one copolymer (P1) according to one of claims 1 to 8 and at least a copolymer (P2) according to one of Claims 12 and 13.