Claims:We claim
1. Emulsion polymer including monomers from renewable resources comprising sorbitol based copolymer particles providing polymer chain including sorbitol with reduced content of styrene and acrylates and comparable emulsion polymer properties.

2. Emulsion polymer including monomers from renewable resources as claimed in claim 1 which is a surfactant stabilized sorbitol based emulsion and wherein said sorbitol based copolymer particles are obtained of seeded emulsion polymerization.

3. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 or 2 having film forming ability in the range of 13-20?C with good drying film properties no bits and slightly hazy film and adhesion no peel off till 4 hours of wetting.

4. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 3 comprising high solids emulsion with sorbitol content is 10-20% more preferably 15% of the total solid content.

5. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 4 comprising monoethylenically unsaturated monomers including BA, Styrene, GMAA, vinyl trimethoxy silane and polyols wherein polyols are preferably from renewable resource-based monomers including said sorbitol.

6. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 5 wherein the size of the particles 50-300 nm and emulsion viscosity is 40-150 gram/centimeter-second.

7. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 6 providing dry films whichare water and alkali resistant & mechanically and electrolytically stable formulation and having low Tg and MFFT.

8. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 7 wherein the surfactants are selected from anionic and non-ionic surfactant.

9. Emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 8 wherein monoethylenically unsaturated monomers 41.59% including BA, MAA, styrene and VTMO, sorbitol 10%, surfactant 2.05% (preferably SLES, Atpol5731/70N), catalyst 0.27% including PPS, TBHP and alkali 1.35% which include ammonia and rest is demineralized water.

10. A process for manufacture of emulsion polymer including monomers from renewable resources as claimed in anyone of claims 1 to 9 comprising:
initially carrying out seed emulsion polymerization including surfactant based stabilization of sorbitol followed by involving pre-emulsion including the monoethylenically unsaturated monomers for generating latex seed particles; and
subsequently continuing the reaction involving said latex seed particles under controlled further feeding of pre-emulsion to produce the emulsion polymer having polymer chain including sorbitol.

11. A process for the manufacture of the emulsion polymer including monomers from renewable resources as claimed claim 10 involving seed preparation comprises the steps of
stabilizing sorbitol with surfactants;
heating the solution under stirring;
adding prepolymer comprising monomers, surfactant and water and initiator solution to the kettle;
heating to produce latex seed particles.

12. A process for the manufacture of the emulsion polymer including monomers from renewable resources as claimed claim 11 involving seed preparation comprises the steps of
stabilizing sorbitol by adding demineralized water, sodium lauryl ether sulfate (SLES) and sodium bicarbonate (SBC);
heating the mixture gradually 30?C to 90?C preferably to 80° C under stirring at 100 to 250 rpm preferably 200 rpm;
adding 3 to 8 preferably 5% of the above pre-emulsion to the kettle at 75?C to 82?C preferably 80?C, followed by addition of above initiator solution;
stirring the mixture for10 to 20 minutes preferably 15 minutes to produce latex seed particles.

13. A process for manufacture of emulsion polymer including monomers from renewable resources as claimed in anyone of claims 10-12 comprising:
adding remaining PE into the reaction kettle containing the latex seed;
adding silane monomer to the PE flask;
adding solution of TBHP and SFS into the kettle;
cooking for the reaction mass;
adding ammonia solution to the reaction kettle once the reaction is cooled;
filtering the resulting emulsion through a nylon-mesh to provide stable surfactant stabilized sorbitol-based emulsion.

14. A process for manufacture of emulsion polymer including monomers from renewable resources as claimed in anyone of claims 10- 13 comprising
adding remaining PE into the reaction kettle containing the latex seed over a period of 220 to 260 preferably 240 minutes wherein after100 to 140 minutes preferably 120 minutes of PE feeding, VTMO monomer was added to the PE flask;
adding solution of TBHP and SFS separately into the kettle;
cooking for 30 to 60 minute preferably 45 minutes;
adding ammonia solution to the reaction kettle once the reaction is cooled down to room temperature;
filtering the resulting emulsion through a 80 nylon-mesh to provide stable surfactant stabilized sorbitol-based emulsion.

Dated this the 4th day of July, 2019 Anjan Sen
Anjan Sen and associates
(Applicants Agent)
IN/PA 199
, Description:Field of invention
Present invention describes the synthesis of sorbitol-based emulsions and its application in waterborne architectural paints. Sorbitol is a polyhydric alcohol, does not contain aromatic ring and is derived from naturally occurring raw materials such as wheat, maize etc at cheap price when compared with petroleum based RMs. Sorbitol based co-polymer particles are obtained via seeded emulsion polymerization technique.
Background
The thermo-mechanical performance of renewable polymers is often inferior compared to traditional petroleum-based polymers. For instance, the commercially available polymers polylactide (PLA) and polyhydroxy butyrate (PHB) are brittle, having strain-to-failure of about 1–2% and possess low heat distortion temperatures (~60°C). By taking a composite approach, i.e., combining biobased/renewable polymers with a renewable reinforcement, the property-performance gap between renewable and petroleum-based polymers could be closed. Sugar-based materials from renewable sources are often considered to be the ideal reinforcement candidate for this purpose due to their low cost, low density, renewability and biodegradability (Koon-Yang Lee, Alexander Bismarck, in Bacterial Nanocellulose, 2016)
WO2018138181 A1 20180802 This prior art relates to a sealing compound, comprising: a sealing gel which contains a mixture of emulsion polymer ofconjugated diene either with cross linker (I) which is acrylate based ester of polyhydricalcohol, which also includes sorbitol acrylate; or cross linker (II) – compound having avinylic group. The sealing gel may further contain a. some flaky material for filler or b.Styrene monomer for emulsion polymerization with conjugated diene. Use of sealing compounds as sealing layer in tires, preferably on inner liners in pneumatic motor vehicle tires, hollow bodies or membranes, is also claimed. Pneumatic motor vehicle tires having sealing compounds are also concerned.In this prior art, sorbitol acrylate based crosslinker is used.

US9701830B1 comprising: a polyol acrylate polymer in an emulsion includingwater; a liq. petroleum product; and an emulsifier; the emulsion breaker having apolymer content of > 24 wt% and an inversion viscosity of up to about 200 cps, thepolymer including repeat units resulting from the reaction of an acrylate ester and apolyol, acrylate ester of the structure H2C=C(R1)-C(=O)O-R2-N(R3)(R4), wherein R1, R3, and R4 are each independently selected from the group consisting of H and C1-4alkyl groups, and R2 is selected from the group consisting of C1-6 alkyl groups, the alkylgroups in each instance being straight or branched chain, the polyol selected from thegroup consisting of C2-6 alkylene glycols, mannitol, xylitol, sorbitol, glycerin, and mixturesthereof, the water being present at a level of 10 - 20 wt%, the liquid petroleum productbeing a hydrocarbon which is a pourable liquid at room temperature present at a level of 28 - 38 wt%, the percentages based upon the total wt. of theemulsion breaker taken as 100 wt%.In this case, latex particles are surrounded by the petroleum product for ensuring desired emulsion breaking properties.

CN105062164A This prior art teaches an aqueous antiwear coating, composed of vinylidene chloride 68-88, comonomer 15-35, emulsifier 1.5-3.5, seed emulsifier 0.15-0.35, pH regulator 0.03-0.06, initiator 0.08-0.4 and deionized water 100 parts, wherein, the comonomer contains two or more of acrylic acid, Me acrylate, octyl acrylate, maleic acid and Et acrylate etc.;the emulsifier is one or more of p-octylphenolpolyoxyethylene ether, glycerol monostearate, sorbitol tristearate, sodium styrene sulfonate, sodium alkylbenzene -sulfonate, sodium stearate, sodium dodecyl sulfate and N-dodecyldimethylamine;the pH regulator is one of glacial acetic acid, hydrophosphate, oxalic acid and bicarbonate; the initiator is mixture of hydrogen peroxide and rongalite, or mixture of potassium persulfate and sodium sulfite, or mixture of ammonium persulfate andsodium thiosulfate. In this prior art, sorbitol tristearate is used as a nonionic surfactant and acts as an emulsifying agent.

WO2011051612 A1 teaches alkyd resins, useful for emulsions for paints, varnishes, adhesives, and mastics,have polydispersity 1-20, av. mol. wt. 3000-100,000, dynamic viscosity 10-50 dPas at 80°, and theoretical average oil length 25-65% and are manufactured by polymerization of poly-acid of natural origin, a polyol of natural origin at 180-220° in the presence ofvegetable oils and(or) vegetable-oil fatty acids. Thus, a mixture containing Pripol 1017(fatty acid dimers, mol. wt. 560) 56.7, sunflower-oil fatty acid (mol. wt. 282) 38, glycerol10.5, and Ca(OH)2 was heated 4-5 h at 220° to give a resin with acid no. 15, av. mol. wt.3000-15,000, and polydispersity. In this prior art, polyol (sorbitol) is used for alkyd resin preparation. Then, it has been emulsified.

US20030036488A1teaches a viscosity index improver, which comprises a polymer having a MW of 5,000-2,000,000 and comprising units of at least one monomer selected from the group consisting of:
(a) a monomer represented by the general formula:
CH2-C(RO)—COO—(AO)n—R(2) wherein RO is hydrogen atom or methyl group, R is a C1-40alkyl group, n is 0 or an integer of 1-20 giving 0-10 on average, A is an alkylene group containing 2-4 carbon atoms, plural A's in case of n being at least 2 are the same or different, and the polyoxyalkylene moiety (AO)n in case of the plural A's being different comprises random-wise or block-wise distributed oxyalkylene groups;
(b) an alkyl alkenyl ether;
(c) an alkenyl carboxylate; and
(d) a nitrogen-containing unsaturated monomer.
The suitable monomers, 2-decyl-tetradecyl methacrylate and 2-decyl-tetradecyl acrylate
compose the polymer (A), are also described.
Para [0086] therein teaches C3-10 alkenyl ether and (meth) acrylate, of a saccharide, for example, glycerol, pentaerythritol, sorbitol, sorbitan, diglycerol, and sucrose (e.g.,sucrose (meth)allyl ether, etc.).
Polymerization reaction can be bulk polymerization, emulsion polymerization or suspension polymerization in addition to the above-mentioned solution polymerization. In this prior art, sorbitol-based monomer has been used to make a polymer to improve the viscosity.

JPH1072404A PROBLEM TO BE SOLVED: To obtain a new (meth)acrylic acid ester of sorbitol useful as acompound cured by active energy rays by reacting sorbitol with a (meth)acrylic acid, etc.
SOLUTION: The objective (meth)acrylic acid ester of sorbitol is represented by the formula [R<1> is H or methyl; (m) is a number having average value of 0.1-6.0 with the proviso that (m)+(n) is 6]. For example, the ester is preferably obtained by reacting (A) the sorbitol with (B) a (meth)acrylic acid, (C) a (meth) acrylic ester or (D) a (meth)acrylichalide [especially a (meth)acrylic chloride] and the component A is reacted with compound B in the presence of a catalyst such as p-toluenesulfonic acid at a temperaturewithin a range of 20-2000 C for about 0.5-20 hr.

US2858282 provided a method of making latex sponge rubber wherein Sorbitol was used as a humectant.

GB1035220 relates to a process for improving the bonding with rubber of polyethylene terephthalate tire cord & (GB1385498) process of preparing a latex of an organic polymer from a solution of this polymer in an organic solvent wherein Sorbitol was used as a stabilizer.
EP2083619 teaches a composition for protecting plants against insects and other pests wherein Sorbitol was used as a thickening agent.

WO2001027177A1 relates to a latex composition comprising:
(a) latex polymer particles comprising a residue of an ethylenically unsaturated monomer;
(b) a sulfo-polyester polymer; and
(c) a diol component
wherein the latex polymer particles are dispersed in a liquid continuous phase.
“Diol" is a synonym for glycol or dihydric alcohol. "Polyol" is a polyhydric alcohol containing three or more hydroxyl groups. Aliphatic polyol may include trimethylolpropane, glycerine, pentaerythritol, erythritol, threitol, dipentaerythritol, or sorbitol. This prior art provides surfactant less latex composition comprising sulfo polyester polymer along with polyol via blending of condensation polymer and latex polymer.

US 4791151 relates to an aqueous dispersion comprising multilobal polymer particles wherein said multilobal polymer particles comprise a polymeric central core and at least two polymeric lobes on said polymeric core, said lobe polymer being compositionally different from said core polymer, where said dispersion of said multilobal polymer particles is useful in binder, coating and adhesive compositions.
Central core: The core is usually prepared first and may itself be grown out on a seed or preform which may be of a different composition and may be used primarily for control of particle size. The composition of the core is one of the main factors controlling lobe formation. Suitable core monomer systems preferably contain 5% or more of monoethylenically unsaturated monomers which contain one or more functional groups chosen from the following: carboxylic acid, carboxylic acid anhydride, hydroxyl, amide, hydroxyethyl, hydroxy propyl, dihydroxy propyl, hydroxy butyl, aldehyde, phosphate, polyethylene glycol, polypropylene glycol, sorbitol, glycerol, silane, and the like, with one or more nonionic or nonfunctional monomers. Preferred core monomer systems have most preferably about 30 to 40% by weight. Here, sorbitol based monoethylenically unsaturated monomer is used for the preparation of the polymer.

A novel one-step synthesis route was reported (Paul A. Charpentier, Paul A. et al Green Chemistry 9(7) DOI: 10.1039/b617634h July 2007) for making the polymer nanocomposites silica–poly(vinyl acetate) (SiO2–PVAc) insupercritical CO2 (scCO2), wherein all raw materials, tetraethoxysilane (TEOS)/tetramethoxy silane (TMOS), vinyl trimethoxy silane (VTMO), vinyl acetate, initiator, and hydrolysis agent were introduced into one autoclave. In-situ ATR-FTIR was applied to monitor the process in scCO2, and the parallel reactions of free radical polymerization, hydrolysis/condensation, and linkage to the polymer matrix, were found to take place. Well-dispersed nanoparticles of 10–50 nm were formed by a process which provided a significant improvement by providing a one-step synthesis route where the potentially recyclable scCO2works as a solvent, a modification agent, and a drying agent.

CA2747477A1 - The advancement relates to novel alkoxylation products bearing alkoxy silyl groups, mostly in the form of copolymers containing (poly)ether alcohols or polyether blocks, which are characterized in that the reactivity of the hydroxyl function is reduced, and methods of production thereof and use thereof. Modified alkoxylation products with at least one non-terminal alkoxysilyl group and use thereof in hardenable compounds with increased storage stability and extensibility. Alkoxylation products, such as polyethers for example, which bear alkoxysilyl groups, where at least one alkoxysilyl group is distributed in block fashion or randomly, non-terminally in the chain of the polyether and where the polyether chain has at least one terminal OH group, should have sufficient storage stability in a sealant or adhesive formulation.

US5204404 relates to a water-based coating composition containing about 10-30% by weight of film forming binder dispersed in an aqueous carrier; wherein the binder contains acrylic silane polymer of polymerized monomers of alkyl methacrylate, alkyl acrylate or mixtures thereof, a silane containing alkyl acrylate or methacrylate and the polymer has an acid no. of 2-100 and a hydroxyl no. of up to 100, a glass transition temperature of -40 to 25 C and a weight average molecular weight of 500,000 to 3,000,000;
b. a polyurethane selected from the following group:
polyester urethane, polyether urethane or polyacrylo urethane; the composition is useful for painting and refinishing the exterior of automobiles and trucks.

EP 2196482B1 teaches the compositions containing a grafted a-olefin-vinyl acetate copolymer containing crosslinkable silyl groups which is composed of one or more a-olefin-vinyl acetate copolymers as component A, of which at least one, as component A1, has a vinyl acetate content of =60% by weight, based on the total weight of the a-olefin-vinylacetate copolymer A1, and at least one unsaturated silane which contains at least one hydrolysable group and which is grafted on to the one a-olefin-vinyl acetate copolymer or a plurality of a-olefin-vinyl acetate copolymers, as component B. The advancement furthermore relates to crosslinkable compositions containing the grafted a–olefin-vinyl acetate copolymer and at least one crosslinking catalyst, the use of the crosslinkable compositions for the production of insulation or sheath materials for cables or lines, a process for the crosslinking of the compositions by bringing the crosslinkable compositions into contact with water, crosslinked compositions obtainable by the crosslinking process, and insulation or sheath materials for cables or lines containing the crosslinked composition.

Although it is mentioned in the prior art that sorbitol can be used as the seed along with 5% or more of monoethylenically unsaturated monomers but the said sorbitol does not become a part of the polymer chain. Sorbitol can be used as acrylate monomer or can be used as alcohol for esterification or can be used as humectant, stabilizers etc. But sorbitol as such without any modification used in latex composition is not known to the prior art.

Polymerization process initiation depends on many factors, such as the presence of dissolved oxygen, impurities and inhibitors, many of which are difficult to control. As a result the initiation step is very variable and the rate of polymerisation and final latex particle size are difficult to control.
The final latex particle size in an emulsion polymerization is controlled by the short nucleation stage at the start of the reaction and by the stabilization of the nuclei during the growth stage. Nucleation depends on the formation of radicals, a process that is very variable. This variability leads to variations in the polymerisation rate and in the size of the final latex particles.
The seeded polymerisation process overcomes these problems by providing nuclei on which the polymer particles can grow.The addition of seed particles at the start of the reaction, removes the variability in the nucleation step. The polymerization rate and particle size can be easily controlled. Seeded polymerizations also give less reactor build up, reduced pebble and give more stable latices. A reduction in customer complaints showed that customers also benefited by the change. In addition, by carefully controlling the amount of seed used, it is possible to produce bimodal latices with reduced latex viscosity.
Seeded emulsion polymerization has the following features
1. Heterogeneous system
2. Nucleation site: water
3. Bigger than seed particles
4. Monodisperse
5. Good for controlling morphology

And the components needed for polymerization are
Seed polymer particles
Monomer/monomers
Water
Water soluble initiator
Surfactant

Objective of the invention
Thus the basic objective of the present invention is to incorporate sorbitol with regular monomers like styrene, BA, GMAA etc. in a polymer chain.
Another objective of the present invention is to synthesizethe polymer incorporating sorbitol byemulsion polymerization.
Another object of the present invention is to incorporate sorbitol in the latex without compromising the quality of the resulting emulsion with respect to the petroleum analogue.
Another object of the present invention is to incorporate higher dosage of sorbitol which would require lesser amount of petroleum-based monomers for emulsion synthesis.
Another objective of the present invention is to provide a process involving easy processing technique.
Another objective of the present invention is that the industrial production system will be such that it would not require any additional CAPEX.
And yet another objective of the present invention is that the overall process should be very cost effective.
Summary of the invention
The present invention is basically directed to an emulsion polymer including monomers from renewable resources comprising sorbitol based copolymer particles providing polymer chain including sorbitol with reduced content of styrene and acrylates and comparable emulsion polymer properties.

Another aspect of the present invention provides an emulsion polymer including monomers from renewable resources which is a surfactant stabilized sorbitol based emulsion wherein said sorbitol based copolymer particles are obtained of seeded emulsion polymerization.

Yet another aspect of the present invention provides an emulsion polymer including monomers from renewable resources having film forming ability in the range of 13-20?C with good drying film properties no bits and slightly hazy film and adhesion no peel off till 4 hours of wetting.

Further aspect of the present invention provides an emulsion polymer including monomers from renewable resources comprising high solids emulsion with sorbitol content is 10-20% more preferably 15% of the total solid content.

Still further aspect of present invention provides an emulsion polymer including monomers from renewable resources comprising monoethylenically unsaturated monomers including BA, Styrene, GMAA, vinyl trimethoxy silane and polyols wherein polyols are preferably from renewable resource-based monomers including said sorbitol.

Another aspect of the present invention provides an emulsion polymer including monomers from renewable resources wherein the size of the particles 50-300 nm and emulsion viscosity is 40-150 gram/centimeter-second

Another aspect of the present invention provides an emulsion polymer including monomers from renewable resources providing dry films which are water and alkali resistant & mechanically and electrolytically stable formulation and having low Tg and MFFT.

Yet another aspect of the present invention provides emulsion polymer including monomers from renewable resources wherein the surfactants are selected from anionic and non-ionic surfactant.

A further aspect of the present invention provides emulsion polymer including monomers from renewable resources wherein monoethylenically unsaturated monomers 41.59% including BA, MAA, styrene and VTMO, sorbitol 10%, surfactant 2.05% (preferably SLES, Atpol5731/70N), catalyst 0.27% including PPS, TBHP and alkali 1.35% which include ammonia and rest is demineralized water.

Still further aspect of the present invention provides a process for manufacture of emulsion polymer including monomers from renewable resources comprising:
initially carrying out seed emulsion polymerization including surfactant based stabilization of sorbitol followed by involving pre-emulsion including the monoethylenically unsaturated monomers for generating latex seed particles; and
subsequently continuing the reaction involving said latex seed particles under controlled further feeding of pre-emulsion to produce the emulsion polymer having polymer chain including sorbitol.

Another aspect of the present invention provides a process for the manufacture of the emulsion polymer including monomers from renewable resources involving seed preparation comprises the steps of
stabilizing sorbitol with surfactants;
heating the solution under stirring;
adding prepolymer comprising monomers, surfactant and water and initiator solution to the kettle;
heating to produce latex seed particles.

Yet another aspect of the present invention provides a process for the manufacture of the emulsion polymer including monomers from renewable resources involving seed preparation comprises the steps of
stabilization of sorbitol by adding demineralized water, sodium lauryl ether sulfate (SLES) and sodium bicarbonate (SBC);
heating the mixture gradually 30?C to 90?C preferably to 80° C under stirring at 100 to 250 rpm preferably 200 rpm;
adding 3 to 8 preferably 5% of the above pre-emulsion to the kettle at 75?C to 82?C preferably 80?C, followed by addition of above initiator solution;
stirring the mixture for10 to 20 minutes preferably 15 minutes to produce latex seed particles.

A further aspect of the present invention provides a process for manufacture of emulsion polymer including monomers from renewable resources comprising:
adding remaining PE into the reaction kettle containing the latex seed;
adding silane monomer to the PE flask;
adding solution of TBHP and SFS into the kettle;
cooking the reaction mass;
adding ammonia solution to the reaction kettle once the reaction is cooled;
filtering the resulting emulsion through a nylon-mesh to provide stable surfactant stabilized sorbitol-based emulsion.

A still further aspect of the present invention provides a process for manufacture of emulsion polymer including monomers from renewable resources comprising:
adding remaining PE into the reaction kettle containing the latex seed over a period of 220 to 260 preferably 240 minutes wherein after100 to 140 minutes preferably 120 minutes of PE feeding, VTMO monomer was added to the PE flask;
adding solution of TBHP and SFS separately into the kettle;
cooking for 30 to 60 minute preferably 45 minutes;
adding ammonia solution to the reaction kettle once the reaction is cooled down to room temperature;
filtering the resulting emulsion through a 80 nylon-mesh to provide stable surfactant stabilized sorbitol-based emulsion.

Details of the invention
Disposal of polymers derived from petroleum/fossil-based monomers is a serious threat to the environment. D-Glucitol, also known as sorbitol, is one of the most promising sugar-based platforms for building blocks that can be used for industrial applications to overcome such issues. However, emulsion polymers having sorbitol is not known in literature for its use as coating materials. In general, it is difficult to incorporate sugar-based materials with regular monomers like styrene, BA, GMAA etc.
The present invention proposes a method to synthesize sorbitol-based latexes having excellent film forming ability with good drying film properties and adhesion. In the present work, successful incorporation of sorbitol 10-20% preferably 15% with monomers such as styrene, BA etc is demonstrated. Higher sorbitol content (beyond 20%) leads to poor kettle hygiene and coagulum formation.

Example 1: Method of polymer preparation

1 liter glass kettle equipped with a mechanical stirrer, reflux condenser, thermometer and inlet tube for pre emulsion feeding is placed in a water bath. Demineralized water, sodium lauryl ether sulfate (SLES), sorbitol and sodium bicarbonate (SBC) were added to the glass kettle with the quantities as specified in the following table. The mixture was then gradually heated to 80° C under stirring at 200 rpm. Separately two solutions were prepared in the flask: (1) an initiator solution of potassium persulfate (PPS) in water, and (2) a pre emulsion (PE) of monomer, surfactant, and water.
5% of the said pre-emulsion was added to the kettle at 80?C, followed by addition of said initiator solution. The mixture was stirred for 15 minutes to produce latex seed particles. After 15 minutes, remaining PE was fed into the reaction kettle over a period of 240 minutes. After 120 minutes of PE feeding, VTMO monomer was added to the PE flask. Aftercompletion of the feeding of PE, a solution of TBHP and SFS (sodium formaldehyde sulphoxylate (SFS) and tert-butyl hydroperoxide (TBHP) as redox initiatorswere added separately into the kettle. The reaction was held for 45 minutes at the same temperature and condition. The reaction was cooled down to room temperature and ammonia solution was added to the reaction kettle. The resulting emulsion was filtered through a 80 nylon-mesh.

Ingredients Example 1
Reactor Charge Wt%
SLES 0.3
SBC 0.07
Sorbitol (70%) 10
DMW 15.7

Initiator solution
PPS 0.07
DMW 2

Pre Emulsion
DMW 24.7
SLES 0.8
Atpol 5731/70N 0.95
PPS 0.35
Styrene 19.2
BA 20.54
MAA 1.35

After 2 hrs
VTMO 0.5

Solution
TBHP 0.1
DMW 0.4
SFS 0.1
DMW 0.4
Ammonia solution 1.35
DMW 1.12

[Methyl methacrylate (MMA), Butyl acrylate (BA), Methacrylic acid (MAA), sodium bicarbonate (SBC), potassium persulfate (PPS),and water (DMW). Sodium lauryl ether sulfate (SLES). Vinyl trimethoxy silane( VTMO)]

Example-2
Characterization and evaluation of the functional attributes
The thermo-mechanical performance of the resulting latex was evaluated and they are presented in the following table in comparison to a standard styrene-acrylate latex composition.

S No Description Latex of Example 1 Styrene- acrylate latex
1 Wet film Milky white
Milky white

2 Dry film properties
Clarity slight hazy clear
*bits No No
3 Water resistance no peel off, till 4 hrs no peel off till 4 hrs
4 pH 9.77 9.7
5 % NVM 50 50
6 Viscosity [gms] 69 75
7 Particle size (nm) 150 145
8 Freeze thaw stability [-5 ° C] passed all 5 cycles
9 Mechanical stability pass
10 Accelerated stability (@ 50?C,15 days) pass
11 Electrolytic stability ml/100 g 34 34
12 Tg by DSC 22.2 24
13 MFFT °C 16 17

Thus the latex obtained following the disclosed method exhibits excellent properties like stability (mechanical, freeze thaw cycle for 5 cycles as well as accelerated stability at 50? C for 15 days), no peel off till 4 hours of wetting, superior electrostatic stability.