Abstract: The current invention provides a photopolymerized pressure-sensitive adhesive which adheres well to all common surfaces and has an outstanding ability to bond to plasticized vinyl substrates and to remain firmly bonded thereto even after the in contact therewith for extended periods of time comprising the photopolymerization reaction product of a mixture containing about: 60-95 parts of alkyl acrylate; 5-40 parts monoethylenically unsaturated polar copolymerizable monomer; 10-30 parts ethylene vinylacetate copolymer containing about 40% to 70% vinylacetate; and 0.1-1 part photoinitiator.

Abstract: Disclosed is a graft copolymer resin prepared by graft polymerizing a vinyl compound onto a composite-structured acrylic rubber whose particles are composed of a core consisting of a diene rubber enlarged by treatment with an acid group-containing copolymer latex, and an outer layer consisting of an acrylate polymer having a crosslinked structure formed by the combined use of a graft-linking agent and a cross-linking agent. This graft copolymer resin may be blended with a rigid thermoplastic resin in a specific proportion. This resin composition imparts a good gloss to the molded articles formed therefrom, while retaining excellent impact resistance and weather resistance.

Abstract: Electron-beam cure by itself or in combination with multifunctional additives is used to improve the high-temperature shear properties of emulsion polymerized pressure-sensitive adhesives.

Abstract: There are disclosed a light-diffusing methacrylic resin comprising a dispersion of crosslinked fine particles in a substrate polymer comprising mainly methyl methacrylate and having the characteristics mentioned below:(1) the difference between the refractive indexes of the crosslinked fine particles and the substrate polymer is 0.02 to 0.15.(2) the concentration by weight of the poly-functional monomer used as starting material in the crosslinked fine particles is 5 to 20%,(3) the average particle diameter of the crosslinked fine particles in the light-diffusing methacrylic resin is 5 to 20.mu., the percentage of particles having a particle diameter of 2.mu. or less being less than 1% by weight in the total amount of the crosslinked fine particles to be mixed, and(4) the concentration by weight of the crosslinked fine particles in the light-diffusing methacrylic resin is 0.08 to 10%, and a process thereof.

Abstract: A methacrylic acid ester composition comprising 10 to 50 parts by weight of a cross-linked acrylic acid ester elastomer (A) and 50 to 90 parts by weight of a resin component, the total amount of the elastomer (A) and the resin component being 100 parts by weight; which is prepared by(a) preparing the cross-linked acrylic acid ester elastomer (A) by emulsion-polymerization,(b) adding a monomer component (B) to the elastomer (A) in the emulsion, and(c) polymerizing a monomer mixture (2) in the presence of the elastomer (A) to give the resin component.The composition is excellent in the processibility and can provide the film having the excellent transparency, weatherability, flexbility and whitening resistance to hot water.

Abstract: A process is described for the preparation of a polymer which contains, besides polymerized units of vinyl chloride, 30 to 60% by weight, relative to the polymer, of polymerized units of an acrylate, if appropriate together with copolymerizable monomers. The acrylate is firstly polymerized in aqueous emulsion with addition of a monomer containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the presence of a fatty acid salt and in the presence of an alkane- or alkylarylsulfonate. Polymerization in aqueous suspension is then carried out in which vinyl chloride, customary polymerization auxiliaries, a precipitant for the emulsifiers used in the emulsion polymerization, and water are initially introduced, and the acrylate dispersion produced by emulsion polymerization is subsequently added. Polymers of high bulk density and good free-flowing properties which can easily be demonomerized are thus obtained.

Abstract: A rubber composition capable of giving a vulcanizate having improved ozone resistance. The composition comprises a nitrile group-containing highly saturated polymer rubber having an iodine value of not more than 80, an organic peroxide, a crosslinking coagent and a quinoline-type stabilizer.

Abstract: Polymer powders and thermoplastic moulding materials with improved properties are obtained if graft polymers and/or resins in particle form are used and small amounts of rubber-like polymers are polymerized or graft-polymerized onto their particle surfaces.

Abstract: Polymerizable compositions are described on the basis of (meth)acrylic acid esters which contain as filler a precipitation polymer that is formed from acrylic acid esters and/or methacrylic acid esters, and possibly other copolymerizable monomers, with 10 to 100 mol % of the (meth)acrylic acid esters being bi or polyfunctional. These compositions are particularly suitable as dental compositions.

Abstract: An ethylene propylene rubber mixture highly adhesive to zinc-plated metals and a heat resistant ethylene propylene rubber conveyor belt having load-carrying zinc-plated steel cords embedded therein are disclosed.The heat resistant conveyor belt composed of (a) an outer covering rubber layer and an inner covering rubber layer both of an ethylene propylene rubber and (b) an adhesive rubber layer having load-carrying zinc-plated steel cords embedded therein parallel to each other at a distance therebetween in the longitudinal direction of the belt, the adhesive rubber layer being disposed between the covering rubber layers and bonded integrally to the covering rubber layers, the adhesive rubber comprising: an ethylene propylene rubber, an organic peroxide, a cross-linking aid, a cobalt salt of organic carboxylic acids, and sulfur.

Abstract: Disclosed is a graft copolymer resin prepared by graft polymerizing a vinyl compound onto a composite-structured acrylic rubber whose particles are composed of a core consisting of a diene rubber enlarged by treatment with an acid group-containing copolymer latex, and an outer layer consisting of an acrylate polymer having a crosslinked structure formed by the combined use of a graft-linking agent and a cross-linking agent. This graft copolymer resin may be blended with a rigid thermoplastic resin in a specific proportion. This resin composition imparts a good gloss to the molded articles formed therefrom, while retaining excellent impact resistance and weather resistance.

Abstract: A process for producing crosslinked polymer particles which comprises a first step of polymerizing a polymerizable monomer containing from 0.1 to 2.0% by weight, based on the entire polymerizable monomer, of a crosslinkable monomer in a medium in which the polymerizable monomer is soluble but the resulting polymer is insoluble, to obtain crosslinked polymer particles having a particle size of from 0.8 to 10 .mu.m, and a second step of letting the crosslinked polymer particles absorb from 1 to 50 times by weight of a polymerizable monomer containing from 2 to 100% by weight, based on the entire polymerizable monomer, of a crosslinkable monomer in an aqueous medium, followed by polymerization to obtain crosslinked polymer particles having a particle size of from 1 to 30 .mu.m and a crosslinking degree of from 1.

Abstract: An acrylic rubber composition comprising (A) a copolymer and (B) a crosslinking agent, said copolymer (A) consisting essentially of (a) from 3 to 10% by weight of ethylene, (b) from 0 to 10% by weight of at least one crosslinkable monomer selected from the group consisting of monomers of the formulas (1), (2), (3) and (4): ##STR1## wherein R.sub.1 is hydrogen or methyl, ##STR2## wherein R.sub.2 is vinyl, allyl or methallyl, ##STR3## wherein R.sub.3 is hydrogen or methyl,R.sub.4 OOC--CH.dbd.CH--COOH (4)wherein R.sub.4 is methyl, ethyl, propyl, butyl, methoxymethyl, methoxyethyl, methoxypropyl, methoxybutyl, ethoxybutyl, ethoxyethyl, ethoxypropyl or ethoxybutyl, and (c) from 80 to 97% by weight of other copolymer component, said other copolymer component (c) consisting essentially of (i) from 0 to 10% by weight of vinyl acetate, (ii) from 20 to 45% by weight of ethyl acrylate and (iii) from 45 to 70% by weight of n-butyl acrylate, the total amount of constituents (i), (ii) and (iii) being 100% by weight.

Abstract: A multilayer interpolymer material of an elastomeric inner phase polymerized from (a) 50-99.9 parts of at least one among: conjugated dienes and alkyl and aralkyl acrylates, (b) 0-49.9 parts of at least one copolymerizable monomer, (c) 0.05-8 parts of at least one crosslinking monomer, and (d) 0.05-6 parts of at least one grafting monomer, and a nonelastomeric outer phase, polymerized from (a) 50-99.9 parts by weight of at least one among: alkyl methacrylates, vinyl aromatic hydrocarbons and unsaturated nitriles, (b) 0.1-50 parts of at least one copolymerizable monomer, and (c) 0-5 parts of at least one chain-limiting agent, the parts being given by weight, it being possible for the said polymer to comprise a nonelastomeric or else elastomeric core phase without grafting and crosslinking monomers. Two populations of particles of mean diameter of approximately 40-150 nm and approximately 160-500 nm respectively are mixed in given ratios. This improves the impact strength of the resultant matrices.

Abstract: A resin having a low dielectric constant obtained by heat-curing 100 parts by weight of a butadiene polymer containing in its polymer chain at least 50 mol% of a 1,2-butadiene unit having a double bond in its side chain and from 10 to 100 parts by weight of a vinyl compound having at least 3 vinyl groups in one molecule in the presence of an organic peroxide. Also disclosed is a resin having flame resistance obtained by heat-curing a blend of an organic peroxide with a composition comprising 100 parts by weight of a butadiene polymer containing in its polymer chain at least 50 mol% of a 1,2-butadiene unit having a double bond in its side chain, from 10 to 100 parts by weight of a vinyl compound having at least 3 vinyl groups in one molecule and at least one member selected from the compounds of the formulas I-IV: ##STR1## wherein X is H or CH.sub.3, Y is Br or Cl, A is --, --o--, --CO--, SO.sub.2, --CH.dbd.CH--, --C(CH.sub.3).sub.2 --or --(CH.sub.2 .sub.

Abstract: Overpolymer acrylate rubbers comprising a rubbery alkyl acrylate polymer, an overcoat of a cross-linked and grafted polymer having a Tg value of over about 20.degree. C. and a second overcoat of a grafted but uncross-linked polymer having a Tg value of over about 20.degree. C. provide an exceptional balance of properties when blended to prepare weatherable impact modified thermoplastic molding resins.

Abstract: Disclosed is an easily-dyeable resin composition used in a sublimation type heat-sensitive transfer process. The composition comprises 100 parts by weight of a mixture composed of 40 to 95% by weight of a polyester resin and 5 to 60% of a crosslinking agent curable with active energy rays, and 0.01 to 12 parts by weight of a surface active agent selected from silicon-containing surface active agents and fluorine-containing surface active agents.

Abstract: The invention is directed to a photosensitive polymer composition capable of being electrophoretically depositable as an adherent, uniform photosensitive film on a conductive surface. The photosensitive polymer composition useful for electrodeposition is formed from an aqueous solution or emulsion of at least one polymer having charged carrier groups, a photoinitiator and a source of unsaturation for crosslinking the resulting film upon exposure to actinic radiation. The photosensitive film formed from the photosensitive polymer composition is aqueous developable and resistant to strong inorganic acids and strong bases. The photosensitive polymer composition is useful in the preparation of printed circuit boards, lithographic printing plates, cathode ray tubes, as well as in chemical milling, solder resist and planarizing layer applications.

Abstract: Improved core-shell polymers having an alkali-insoluble core and an alkali-soluble shell are prepared by emulsion polymerization of the core-shell polymers utilizing compounds which chemically graft the core and shell together. The core-shell polymers exhibit improved solvent stability, water resistance, heat resistance and rheology. The polymers are useful in application such as inks, coatings and varnishes, floor polishes, leather treatment, cement formulations, and as a seed for further emulsion polymerization.

Abstract: Crosslinked polymer microparticles that have a particle size of about 0.1-5 microns of polymerized monomers of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof, about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1-5% by weight of allyl methacrylate or allyl acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,000; polymeric chains are grafted onto the polymer microparticles; the microparticles are useful as additives for coating compositions to control rheology and in particular for metallic pigment flake and sag control.

Abstract: Composite acrylic resin particles prepared by effecting an emulsion polymerization of a monomer mixture of(A) at least one crosslinking monomer having in its molecule two or more radically polymerizable mono- or 1,1-di-substituted ethylenic unsaturation bonds, or a combination of at least two monomers each having a mutually reactive functional group and one or more radically polymerizable mono- or 1,1-di-substituted ethylenic unsaturation bonds,(B) at least one mono-functional polymerizable monomer other than an aromatic compound, and(C) at least one monomer having in its molecule one or more radically polymerizable mono- or 1,1-di-substituted ethylenic unsaturation bonds and one or more radically polymerizable 1,2-di-, 1,1,2-tri- or 1,1,2,2-tetra-substituted ethylenic unsaturation bonds, and graft-polymerizing thus obtained particles with a polymerizable aromatic compound and other optional mono-functional monomers.

Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric paper, fiber and plastics are made from copolymers of p-acetoxystyrene and another monomer which is an alkadiene or an allyl ester of a polymerizable ethylenically unsaturated acid blended with ethylenically unsaturated compounds.

Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric, paper, fiber and plastics are made from copolymers of dialkyl muconates and p-acetoxystyrene blended with ethylenically unsaturated compounds.

Abstract: Large acrylic star polymers containing single- and multi-functional monomers in the core are made by group transfer polymerization techniques, preferably by arm-first, core-first or arm- core- are approaches.

Abstract: A process for preparing a crosslinked polymer comprises reacting a polycyanoacetic functional monomer or polymer with a poly .alpha.,.beta.-unsaturated ester in the presence of a catalytically effective amount of a metallic catalyst. A crosslinked polymer produced by this process is also described.

Abstract: Low gloss impact and weather resistant thermoplastic resins comprising a hard matrix polymer and a grafted alkylacrylate rubber having a core of a substantially uncrosslinked alkylacrylate polymer and a graftable overpolymer layer of a high crosslink density alkylacrylate polymer.

Abstract: A process for the production of a thermoplastic composition for molded parts having improved impact resistance, transparency, surface gloss, and weatherability, and formed of a hard inner core of crosslinked polystyrene, a rubber-elastic intermediate layer of crosslinked polyacrylic ester, and an outer layer of polyvinyl chloride, wherein the inner core thereof is produced by the steps of:(a) forming a mixture, before or after addition of an initiator, under polymerization conditions in the presence of an emulsifier, of 0.01-5.

Abstract: Large acrylic star polymers containing multifunctional monomers in the core are made by group transfer polymerization techniques, preferably by arm-first, core-first, or arm-core-arm approaches.

Abstract: A methacrylic resin molding material, comprising a partially cross-linked polymer gel obtained by partially polymerizing a mixture comprising (A) a resin raw material selected from the group consisting of monomeric alkyl methacrylates, .alpha., .beta.

Abstract: Disclosed is a prosthetic composition comprising (A) a diester monomer represented by the following formula: ##STR1## wherein R.sub.1 stands for an alkylene group having 2 to 6 carbon atoms andR.sub.2 stands for an alkyl group having 2 to 4 carbon atoms,or a mixture of said diester monomer and other monomer copolymerizable therewith, (B) an orgnic polymer soluble in the monomer (A) in an amount of 0.5 to 5 parts by weight per part by weight of said monomer (A) and (C) a radical polymerization initiator.

Abstract: A highly water-absorptive optical material obtained by saponification for hydrophilic treatment of a copolymer composed essentially of:(A) from 2 to 30 parts by weight of a (meth)acrylate polymer having at least one polymerizable group per molecule on an average obtained by copolmerizing (a) at alkyl (meth)acrylate monomer and (b) a monomer having at least two polymerizable groups per molecule, as the main components, and(B) from 70 to 98% by weight of a fatty acid vinyl ester.

Abstract: Compositions suitable as binders for high solids, ambient cure coatings, and coating compositions which have high humidity resistance and good weatherability are disclosed herein.

Abstract: The invention relates to partially hydrophilic, non-ionic crosslinked copolymers.These copolymers consist of a crosslinked hydrophobic backbone having a high mechanical strength, and of non-ionic hydrophilic chains grafted selectively onto the backbone.The copolymers are useful for size exclusion chromatography in an aqueous medium.

Abstract: Optionally nucleo-substituted styrene polymers are crosslinked at temperatures above 110.degree. C. with combinations of crosslinkage promoters containing at least two polymerizable C--C double or C--C triple bonds in the molecule, and organic peroxides (with the exception of hydroperoxides, peracids, and ketone peroxides) having a 10 hour halflife temperature below 106.degree. C.

Abstract: Large acrylic star polymers, having a low polydispersity of polymer molecular weight and of arm molecular weight and containing multifunctional monomers in the core.

Abstract: Large acrylic star polymers, having a low polydispersity of polymer molecular weight and of arm molecular weight and containing single- and multi-functional monomers in the core.

Abstract: A method for radical cross-linking or organic polymers, is disclosed which uses a cross-linking enhancer of the following formula ##STR1## wherein R is alkenyl or alkynyl;R.sup.1 is alkylene, alkenylene, alkynylene or --(R.sup.2 --O).sub.m --R.sup.2 --, R.sup.2 is CH.sub.2, (CH.sub.2).sub.2, (CH.sub.2).sub.3 or CH.sub.2 --CH(CH.sub.3), and m is 1 to 50; and n is 1 to 10.

Abstract: The invention relates to a thermoplastic molding material of an elastomeric polymer A, a shell B grafted to the polymer A, and a copolymer C as rigid matrix. The amount of polymer A is 1 to 25 percent by weight based on the weight of A+B+C. It has a glass transition temperature, Tg, of less than 0.degree. C. and an average particle size of 200 to 750 nanometers (d.sub.50 value of the integral mass distribution) and is composed of: 50 to 99.9 percent by weight of at least one alkylacrylate with 1 to 8 carbon atoms in the alkyl radical and 0.1 to 5 percent by weight of a polyfunctional monomer which has a crosslinking action. Grafting shell B represents 5 to 40 percent by weight based on A+B+C and is composed of at least one of the monomers of the group of(b.sub.1) vinylaromatic monomers, and(b.sub.2) the ethylenically unsaturated monomers.Grafting shell B is prepared in two stages with 30 to 70 percent by weight of the monomers b.sub.

Abstract: A polyphenylene ether resin composition which possesses out standing impact resistance and weatherability and retains the advantageous properties inherent in a polyphenylene ether, which comprises:(A) 10 to 90 parts by weight of polyphenylene ether resin which is selected from the group consisting of phenylene ether homopolymer and phenylene copolymer,(B) 5 to 88 parts by weight of polystyrene resin which is selected from the group consisting of polystyrene rubber-modified polystyrene, styrene-butadiene copolymer, styrene/butadiene/acrylonitrile copolymer, styrene/.alpha.-methylstyrene copolymer, poly-.alpha.-methylstyrene, rubber-modified styrene/.alpha.

Abstract: A curable resin composition which comprises (1) a copolymer composed of an aminoalkyl acrylate and/or aminoalkyl methacrylate and an ethylenically unsaturated monomer being formulated with (2) a compound having at least two acryloyl groups in the molecule.The composition can be cured at low temperatures in the range of ordinary temperature to 120.degree. C., and therefore advantageously used for the formation of coating films in the application fields, such as plastics, wood and concrete, where heat treatment cannot be performed. Also, the composition which exhibits excellent adherence toward various kinds of substrates can be used as adhesives and different kinds of primers, as well. Furthermore, the composition can provide coating films that excel in terms of water resistance, weathering resistance and solvent resistance, and therefore be utilized for overpaints, etc.

Abstract: Polyfunctional aziridines useful in crosslinking applications have been developed which are reaction products of (1) ethylene imine and (2) acrylates of alkoxylated trimethylol propane, neopentyl glycol, pentaerythritol, bis phenol A, bis phenol F and glycerol, each having a degree of alkoxylation of from about 2 to about 12. Examples are the bis aziridine of the diacrylate of the adduct of neopentyl glycol and 2 moles of ethylene oxide and the tris aziridine of the triacrylate of the adduct of trimethylol propane and 3 moles of ethylene oxide.

Abstract: A UV and thermally curable composition comprising(1) a liquid, ethylenically unsaturated monomer, oligomer or prepolymer of the formula: ##STR1## wherein R is H or CH.sub.3, R.sub.1 is an organic moiety and n is at least 2,(2) a thermal initiator for (1) selected from the group consisting of substituted or unsubstituted pinacols, azo compounds, thiurams, organic peroxides and mixtures thereof,(3) a photoinitiator for (1) selected from the group consisting of aldehyde and ketone carbonyl compounds having at least one aromatic nucleus attached directly to the ##STR2## group, benzoin alkyl ethers, diethoxyacetophenone and 2,2-dimethoxy-2-phenylacetophenone,(4) a thermoplastic material, and(5) a non-polymerizable plasticizer for (4).The exposure of the composition to UV radiation under atmospheric conditions and heat in seriatim results in a cured solid product which can be utilized as adhesives, coatings, gaskets, sealants, resists and the like.

Abstract: This invention is directed to curable molding compositions containing a mixture of a poly(acrylate), a polymerizable ethylenically unsaturated monomer which serves to crosslink the poly(acrylate) to a thermoset product, a thermoplastic polymer low profile additive, and a free radical initiator mixture containing at least one initiator with a 10-hour half-life temperature (t.sub.1/2) of greater than about 90.degree. C. and at least one initiator with a 10-hour half-life temperature (t.sub.1/2) of less than about 90.degree. C. The curable molding compositions exhibit improved shrink control during the curing reaction. This invention is also directed to fiber reinforced thermoset resin articles which exhibit generally improved surface appearance quality and can be produced by a rapid injection molding process from the curable molding compositions.

Abstract: This invention is directed to curable molding compositions containing a mixutre of a poly(acrylate), a polymerizable ethylenically unsaturated monomer which serves to crosslink the poly(acrylate) to a thermoset product, and a thermoplastic polymer low profile additive. The curable molding compositions exhibit improved shrink control during the curing reaction. This invention is also directed to fiber reinforced thermoset resin articles which exhibit generally improved surface appearance quality and can be produced by a rapid injection molding process from the curable molding compositions.

Abstract: Elastomer toughened two-part acrylic monomer adhesives which employ styrene-butadiene block copolymer rubbers as the elastomer have improved heat resistance properties at temperatures typical of industrial paint bake ovens. The adhesives include: in one part an acrylic monomer, at least 33% by weight of the rubber dissolved in the monomer, and a free radical catalyst system free of organic sulfonyl chloride; and in the other part a polymerization activator such as an amine-aldehyde condensation product.

Abstract: The impact resistance of resin compositions consisting of a thermoplastic polymer, particularly a homopolymer or copolymer of vinyl chloride, can be improved by an impact additive of the graft copolymer type. The graft copolymer impact additive consists of a backbone composed of a statistical copolymer of butadiene or isoprene, an alkyl acrylate of a C.sub.2 to C.sub.12 alkyl, and a polyfunctional cross-linking agent, onto which are grafted the chains of a polymer of an alkyl methacrylate of a C.sub.1 to C.sub.4 alkyl, particularly methyl methacrylate. The backbone of the graft copolymer impact additive comprises 0.5-35% by weight butadiene or isoprene, and up to 10 mole % of the cross-linking agent, while the weight ratio of grafted chains to the backbone can range from 10 to 200%.The resin compositions are particularly useful to improve impact strength at low temperatures.

Abstract: Rapidly curable adhesive compositions suitable for bonding polypropylene, comprising a polymer of sulfochlorinated and/or chlorinated polypropylene with an average chlorine content of 26% to 34% by weight, and an average molecular weight of 5,000 to 120,000, dissolved in monomeric ingredients such as acrylic and/or methacrylic monomers.

Abstract: A rubber composition having improved steam resistance comprising a nitrile group-containing hydrocarbon rubber having an iodine number of not more than 120, an organic peroxide vulcanizer and a crosslinking coagent, the amount of said crosslinking coagent being 8 to 30 parts by weight per 100 parts by weight of said rubber.

Abstract: Disclosed is a polybutadiene containing resin system which is curable at room temperature by the addition of copper ethylacetoacetate. The resin system consists of about 5 to about 25% polybutadiene, about 55 to about 90% dicyclopentadiene acrylate, about 5 to about 20% of a monomer having 2 to 4 unsaturated groups selected from vinylic, acrylic, and mixtures thereof, about 0.25 to about 3% free radical initiator, and about 0.1 to about 0.8% of a coaccelerator. Also disclosed is a method of curing a resin system and various products made therewith.

Abstract: What are disclosed are a continuous emulsion polymerization method for making an aqueous dispersion of an impact resistant resin, adaptable to use as a component of impact resistant polymethacrylate forming masses, by first emulsion polymerizing a first monomer component onto core particles of a seed latex until a degree of polymerization of said monomers from 80 to 95 percent is attained, whereby an intermediate product comprising said core particles covered with a rubbery polymer phase is obtained, and then emulsion polymerizing a second monomer component onto the particles of said intermediate product to form a shell of harder polymer on the particles of said intermediate product, and impact resistant resin products made by this method.