Abstract: A vinyl chloride polymer composition comprising (A) 5 to 50% by weight of a MBS resin prepared by firstly graft-polymerizing 15 to 40 parts by weight of monomer component comprising 80 to 100% by weight of methyl methacrylate and 20 to 0% by weight of one or more other vinyl monomers capable of copolymerizing with methyl methacrylate onto 40 to 70 parts by weight of a styrene-butadiene rubber including not more than 50% by weight of styrene, and then, onto the obtained copolymer, secondly graft-polymerizing 10 to 40 parts by weight of monomer component comprising 80 to 100% by weight of styrene and 20 to 0% by weight of one or other vinyl monomers capable of copolymerizing with styrene, a total amount of said styrene-butadiene rubber, the first graft-polymerizing monomer component and the second graft-polymerizing monomer component being 100 parts by weight, and (B) 95 to 50% by weight of vinyl chloride polymer wherein;(i) an amount of said first graft-polymerizing monomer component including methyl methacryl

Abstract: This invention relates to thermoplastic moulding compounds which are free from nitrile groups, obtained from randomly structured aromatic vinyl copolymers containing N-phenyl- or methyl-maleimide, aromatic polycarbonate resins and an elastomer grafted with methyl methacrylate.

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: The invention relates to polymer mixtures which comprise an aromatic polycarbonate resin, a block copolymer, and a graft copolymer. The polymer mixtures according to the invention have a good impact strength, in particular at low temperatures, and do not show any delamination phenomena when injection molded.

Abstract: Copolymers adapted for use as stabilizers in dispersions and stable dispersions, including crosslinked dispersions containing microgel particles, prepared therefrom. Stabilizer bears pendent ethylenic unsaturation capable of reacting with monomers employed in random copolymerization used to make the dispersion polymer. Stabilizer comprises a random copolymer segment of ethylenically unsaturated monomers, some of which are characterized in that homopolymers thereof would be substantially insoluble in the organic liquid used to form the stable dispersion and some of which are characterized in that homopolymers thereof would be substantially soluble in the organic liquid used to form the stable dispersion.

Abstract: A composition comprising a major amount of an aromatic polycarbonate and quantities of both an acrylate elastomeric copolymer with a second order transition temperature, Tg, of less than -10.degree. C. and a phenoxy resin effective to substantially maintain the impact strength and ductility at break after exposing a stressed part to brake fluid comprising alcohols and ethers.

Abstract: Poly(C.sub.2 -C.sub.4 alkylene terephthalate) molding composition containing aromatic polyester and impact modifier. The aromatic polyester is a linear aromatic polyester consisting essentially of bisphenol and dicarboxylic acid monomer components. The impact modifier may be a core-shell polymer polymerized from monomers comprising butadiene or may be a core-shell polymer having a first elastomeric phase polymerized from a monomer system including C.sub.1 -C.sub.6 alkylacrylate as well as crosslinking and graftlinking monomers and having a final rigid thermoplastic phase polymerized in the presence of the elastomeric phase.

Abstract: A thermoplastic molding material consists of from 10 to 90 parts by weight of a polycarbonate A and from 90 to 10 parts by weight of a graft copolymer B having a mean particle size of from 200 to 700 nm (d.sub.50 value of the integral mass distribution). The graft polymer B is formed from an elastomer (rubber) (b.sub.1), which accounts for from 10 to 80% by weight, and a grafted shell (b.sub.2), which accounts for from 90 to 20% by weight, the percentages in each case being based on (B).The elastomer (b.sub.1) is composed of from 50 to 99.9% by weight of an alkyl acrylate, where alkyl is of 1 to 8 carbon atoms, and from 0.1 to 5% by weight of a copolymerizable polyfunctional crosslinking monomer.The grafted shell (b.sub.2) is produced in three stages and contains, as graft monomers,(b.sub.2 a.sub.1) from 5 to 40% by weight of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms,in the first stage,(b.sub.2 a.sub.

Abstract: Thermoplastic molding materials contain a blend of a polyphenylene ether with a copolymer which consists of monovinyl-aromatic monomers, alkyl acrylates where alkyl is of not more than 8 carbon atoms and, if required, an elastomer component having a glass transition temperature of .ltoreq.0.degree. C.

Abstract: A thermoplastic molding material consists of a polycarbonate A and a graft copolymer B, the latter consisting of an elastomer (rubber) (b.sub.1) and a shell (b.sub.2) grafted onto the elastomer.The elastomer (b.sub.1) contains, as copolymerized units, from 35 to 100% by weight of a diene from the group consisting of the conjugated dienes of 4 to 5 carbon atoms, and can contain, as copolymerized units, from 0 to 65% by weight of a monomer from the group consisting of the alkyl acrylates or alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms.The shell (b.sub.2) is obtained in a conventional manner by successive polymerization of the monomers constituting the shell, in two process steps, in the presence of the elastomer (b.sub.

Abstract: Process for making core-sheath polymer particles containing voids, said particles useful for opacifying, comprising (A) emulsion polymerizing a core from a core monomer system comprised of at least one ethylenically unsaturated monomer containing acid functionality; (B) encapsulating said core with a hard sheath by emulsion polymerizing a sheath monomer system in the presence of said core, said sheath permitting penetration of fixed or permanent bases; (C) swelling at elevated temperature the resultant core-sheath polymer particles with fixed or permanent base so as to produce a dispersion of particles which, when dried, contain a microvoid which causes opacity in compositions in which they are contained, provided that either (1) said sheath comprises at least about 1% acid functional monomer or (2) said swelling takes place in the presence of solvent.Compositions comprising said core-sheath polymer particles are also disclosed.

Abstract: The invention pertains to particulate compositions comprising a mixture of a low melting point petroleum additive and a higher melting point polymer which mixture is then coated with a high melting point polymer. The mixture of the additive and higher melting point polymer has a melting point close to the melting point of the polymer (i.e., significantly higher than the melting point of the additive). The high melting point polymer coating allows the composition to be added to petroleum systems having high temperatures without immediately dissolving, i.e., the compositions are only slowly soluble in hot crude oil. Accordingly, a slow, controlled release is afforded by the compositions of the invention.

Abstract: A composition useful for improving impact strength of an aromatic copolyester carbonate having isophthalate units comprising the said aromatic copolyester carbonate and impact modifier useful in impact modifying aromatic polycarbonate.

Abstract: Acrylic films having superior properties are produced by casting a solution comprising an organic solvent and a polymer system of one or more completely polymerized acrylic polymers onto a carrier, removing the solvent thereby forming the film on the carrier, and stripping the film from the carrier.The polymer system comprises at least one polymer prepared by polymerizing monomers of the general formula (I): ##STR1## wherein: R.sub.1 is hydrogen or methyl; and R.sub.2 is straight branched alkyl of about 1-20 carbon atoms, preferably about 1-8 carbon atoms, more preferably 1-4 carbon atoms, and most preferably 1-2 carbon atoms.The polymers are homopolymers, mixed copolymers, and graft copolymers. They may be cross-linked.

Abstract: An impact modifier comprising a blend of 100 parts by weight of a multi-layer graft copolymer composed of monomers selected from the group consisting of alkyl acrylates, alkyl methacrylates, aromatic vinyl compounds, vinyl cyanide compounds and butadienes and having a multi-layer structure consisting of at least three layers (A), (B) and (C) in which the glass transition temperature of the polymer composing the outermost layer (A) is 0.degree. C. or below, the glass transition temperature of the polymer composing the second layer (B) from the outermost layer (A) is 60.degree. C. or above and the glass transition temperature of the polymer composing the third layer (C) from the outermost layer (A) is 0.degree. C. or below, each of the layers containing a polyfunctional crosslinking agent in an amount of 0 to 5% by weight based on the weight of the layer, and 0.

Abstract: A biologically active latex conjugate prepared by the acidification of latex particles of a core/shell polymer having acetal groups in the shell, whereby said acetal groups are converted to aldehyde groups, and then bonding a biologically active substance having an amino group to said aldehyde groups by reductive amination.

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.

Abstract: The addition of styrene-acrylonitrile copolymer to acrylic core-shell thermoplastic elastomers reduces mold shrinkage and improves surface hardness. The compositions are useful as moldable and extrudable rubber goods.

Abstract: A polymeric molding composition containing a polycarbonate resin, a styrenic copolymer and a methylmethacrylate-butadiene-styrene polymer is disclosed. The molding compositions of this invention exhibit excellent impact strength and can be molded over a wide range of processing conditions.

Abstract: Disclosed is a resin composition which is usable for an exterior article without being coated on its surface when molded into the article and is excellent in the color tone and has good impact resistance and weatherability, said composition comprising (I) 10 to 70% by weight of a high-rubber-content graft polymer obtained by polymerizing 50 to 10% by weight of a monomer mixture (C) comprising 10 to 90% by weight of at least one aromatic vinyl monomer and 90 to 10% by weight of at least one ethylenically unsaturated monomer represented by the following general formula:CH.sub.2 .dbd.CRXwherein R stands for a hydrogen atom or methyl group, and X stands for a group --CN or --COOR.sub.1 in which R.sub.1 stands for an alkyl group having 1 to 8 carbon atoms,in the presence of a latex of a multi-layer crosslinked acrylic rubber particles containing 5 to 30% by weight of a rigid crosslinked resin (A) having a core particle size of 0.15 to 0.45.mu.

Abstract: Disclosed is a resin composition which is usable for an exterior article without being coated on its surface when molded into the article and is excellent in the color tone and has good impact resistance and weatherability, said composition comprising (I) 10 to 70% by weight of a high-rubber-content graft polymer obtained by polymerizing 50 to 10% by weight of a monomer mixture (C) comprising 10 to 90% by weight of at least one aromatic vinyl monomer and 90 to 10% by weight of at least one ethylenically unsaturated monomer represented by the following general formula:CH.sub.2 .dbd.CRXwherein R stands for a hydrogen atom or methyl group, and X stands for a group --CN or --COOR.sub.1 in which R.sub.1 stands for an alkyl group having 1 to 8 carbon atoms, in the presence of a latex of a multi-layer crosslinked acrylic rubber particles containing 5 to 30% by weight of a rigid crosslinked resin (A) having a core particle size of 0.15 to 0.40.mu.

Abstract: A composition useful for improving impact strength of an aromatic copolyester carbonate having isophthalate units comprising the said aromatic copolyester carbonate and impact modifier useful in impact modifying aromatic polycarbonate.

Abstract: A sequentially produced multilayer acrylic thermoplastic resin composition is provided, which has (A) a hard first stage layer having a glass transition temperature (Tg) of at least 25.degree. C., polymerized from methyl methacrylate alone or a monomer mixture predominantly comprising methyl methacrylate by emulsion polymerization; (B) a soft second stage layer, polymerized in the presence of the hard first stage layer from a monomer mixture comprising (B-1) a predominant proportion of an alkyl acrylate, (B-2) a minor proportion of a monoethylenically unsaturated monomer and/or a polyfunctional crosslinking monomer, and (B-3) a minor proportion of a polyfunctional graftlinking monomer by emulsion polymerization; said second stage layer exhibiting a Tg of not higher than 25.degree. C.

Abstract: A method for making impact resistant molding compositions wherein a hard phase having a glass transition temperature above 25.degree. C. and consisting principally of methyl methacrylate is polymerized at least partially in a first stage, following which the monomers of a rubbery phase whose polymers have a glass transition temperature below 25.degree. C. are added in a second stage and the polymerization is carried to completion, polymerization of the hard phase in the first stage being performed in a presence of an oil soluble free radical initiator and of an organosulfur chain transfer agent having at least two thiol groups in the molecule, and polymerization of the monomers of the rubbery phase in the second stage being carried out with graft crosslinkers in the presence of the previously formed hard phase.

Abstract: Thermoplastic molding compositions are described which comprise a miscible admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and a minor amount of (c) a third component which is an acrylic polymer. The presence of the acrylic polymer permits the incorporation of amounts of component (b) in excess of 10 parts by weight per 100 parts by weight of (a) and (b) together to improve the stress cracking resistance without normally attendant loss in ductility.

Abstract: The invention relates to soft polymer alloys based on graft polymers and crosslinked, particulate acrylate copolymers which are suitable for the production of flexible moulding compositions having increased resistance to ageing and better resistance to solvents.

Abstract: A multi-layer structure polymer composition having a gel content of at least 50% which is constituted of an innermost layer polymer (A) consisting mainly of alkyl acrylate and having a degree of swelling of 10 or lower, and having a glass transition temperature lower than 10.degree. C., a crosslinked elastomer polymer (B) consisting mainly of alkyl acrylate and having a degree of swelling slightly higher than that of said polymer (A) and having a glass transition temperature not higher than 0.degree. C., said innermost layer polymer (A) and said crosslinked elastomer polymer (B) constituting a double layer elastomer structure polymer, as well as an outermost layer polymer (C) consisting mainly of alkyl methacrylate and having a glass transition temperature not lower than 60.degree. C.

Abstract: A MBS resin useful as a reinforcement for vinyl chloride polymers and capable of improving the impact resistance of the vinyl chloride polymers without impairing the transparency thereof, which is prepared by graft-polymerizing a monomer mixture comprising an aromatic vinyl compound and an alkyl methacrylate onto a butadiene copolymer comprising styrene and butadiene, the butadiene copolymer being present in the polymerization system in a higher proportion as compared with a conventional MBS resin and present in the form of an aqueous latex of particles having a structure such that a portion formed in the last stage of a polymerization for the preparation of the butadiene copolymer amounting to 20% by weight of the produced butadiene copolymer, has a very high butadiene content of 80 to 100% by weight and moreover has at least 5% by weight higher butadiene content than the average butadiene content of the produced butadiene copolymer.

Abstract: A polymer mixture comprising polyvinyl chloride, an aromatic polycarbonate and a rubber like polymer, characterized in that the rubber like polymer is a graft copolymer which is built up from a rubber like main chain with predominantly alkyl acrylate units on which styrene, .alpha.-methylstyrene, acrylonitrile, methacrylic acid esters, acrylic acid esters or mixtures thereof have been grafted.

Abstract: A method of preparing a polymer mixture comprising polyvinyl chloride, an aromatic polycarbonate and a rubber like polymeric, characterized in that first a premixture comprising 60-90% by weight of aromatic polycarbonate and 10-40% by weight of rubber like polymer is prepared by mixing at a temperature above about 220.degree. C., after which the resulting premixture is cooled to a temperature below about 220.degree. C. and is mixed with the polyvinyl chloride.

Abstract: A stable aqueous latex of a copolymer containing at least about 40 percent by weight of a polymerized olefinic unsaturated nitrile is described. The copolymer comprises a main polymer core of from about 40 to 100 percent by weight of the polymerized nitrile and from about 0 to about 60 percent by weight of at least one other polymerized olefin monomer, said main polymer core being overpolymerized with a copolymer comprising a major proportion of a polymerized acrylate and from about one to 40 percent by weight of a polymerized olefinic unsaturated nitrile. A two-step method for preparing such a latex also is described. The latices of the invention are useful in forming films at low temperatures, and the minimum film forming temperature can be regulated by the selection of the particular components and the relative amounts of the components used to form the latices.

Abstract: A composition comprising a polyamide, a reinforcing amount of glass fiber, and 1 to 25, preferably 5 to 25, and more preferably 10 to 20 percent by weight based on the weight of the polyamide of a core/shell polymer. The core/shell polymer comprises 40 to 90 and preferably 50 to 90 parts by weight of an elastomer core and 10 to 60 and preferably 10 to 50 parts by weight of a rigid thermoplastic polymer shell. The shell comprises an interpolymer of 20 to 100 parts by weight of an methyacrylic ester, 0 to 80 parts by weight styrene, and from 0 to 50 parts by weight of acylonitrile. The shell can also contain alkyl acrylates, allyl methacrylates, diallyl methacrylates, and the like. The methacrylic ester is preferably a lower alkyl methacrylate/such as methyl methacrylate. The core is an elastomer and can be a diene elastomer, an ethylene-propylene-diene rubber, an acrylic elastomer, or a polyurethane elastomer.

Abstract: Substantially homogeneous (meth)acrylic acid/itaconic acid copolymers of number average molecular weight of 500 to 7000 are prepared by copolymerizing in aqueous solution 5 to 90 mole percent acrylic or methacrylic acid monomer with 95 to 10 mole percent itaconic acid monomer at 80.degree. to 120.degree. C. in the presence of a polymerization initiator, the acrylic or methacrylic acid monomer and at least half of the initiator being added separately and continuously to the itaconic acid monomer throughout the polymerization period. The copolymers are employed at a level of from about 0.1 to 100 ppm for prevention of alkaline calcium and magnesium scale formation, such as during seawater evaporative desalination.

Abstract: Aqueous latexes of heterogeneous polymer particles comprising (1) a minor portion of a soft interpolymer domain having a glass transition temperature of less than 25.degree. C. and comprising a monovinylidene aromatic monomer such as styrene and an open chain aliphatic conjugated diene such as 1,3-butadiene and (2) a major portion of a relatively hard interpolymer domain having a glass transition temperature greater than 25.degree. C. and comprising a monovinylidene aromatic monomer such as styrene; an open chain aliphatic conjugated diene monomer such as 1,3-butadiene and a functional monomer such as acrylic acid are useful as binders for pigmented paper coating compositions. The coated papers of the invention exhibit an excellent combination of binding strength and stiffness.

Abstract: Paper having enhanced gloss and pick resistance may be prepared using as a binder a latex of heterogeneous particles having a core and shell type structure. The polymer particles have a composition such that the shell is harder than the core.

Abstract: Thermoplastic core-shell compositions having a rigid core, a rubbery acrylic shell and transition layer intermediate between the core and shell layers and formed of the core and shell monomer components have excellent elastomeric properties. Although the rigid and rubbery components include interreactive functional monomers, the resulting elastomers remain thermally processable in extrusion and injection molding equipment.

Abstract: The present invention is concerned with the production and use of water-insoluble particulate heteropolymers made by sequential emulsion polymerization in dispersed particles of which a "core" of a polymeric base is at least partially encased in a "sheath" polymer that is permeable to an acid, such as acetic acid, adapted to cause swelling of the core by neutralization. The aqueous dispersion of the acid-swollen, base-containing core/sheath particles is useful in making water-base coating compositions, microvoids being formed in cores of the swollen particles in the film during the drying thereof. Thus, the heteropolymer dispersion can serve as an opacifying agent in coating compositions, such as water-base paints, as a supplement or replacement of part or all of the pigmentary material or extenders that would otherwise be used in such coating compositions.

Abstract: The present invention relates to mixtures comprising(a) thermoplastic aromatic polycarbonates having Mw (weight average molecular weight) of 10,000 to 200,000, preferably 20,000 to 80,000 (determined by measuring the relative viscosity .eta.rel in CH.sub.2 Cl.sub.2 at 25.degree. C. and a concentration of 0,5 g per 100 ml CH.sub.2 Cl.sub.2(b) thermoplastic polymers of C.sub.1 -C.sub.4 --alkyl methacrylates having Mw (weight average moleculr weight) of 10,000 to 1,000,000 (measured in dimethylformamide at 25.degree. C.) and(c) particulate graft polymers of methyl methacrylate onto a particulate, highly crosslinked alkyl acrylate-rubber which can optionally also contain a crosslinked diene rubber as an inner core, as well as to thermoplastic moulding compositions based on thermoplastic ABS resins or thermoplastic SAN resins which contain the three-component mixture (a)+(b)+(c).

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon a layer containing at least one copolymer coupler latex having a layered structure capable of forming a dye upon coupling with an oxidation product of an aromatic primary amine developing agent. The polymer coupler latex having a layered structure has an exceptionally good color forming property and is capable of forming a dye with a high yield and without the formation of undesired stains and fogs. The silver halide color photographic light-sensitive material containing the polymer coupler latex has good film strength and a reduced layer thickness and provides a color image having an improved sharpness. A method of forming a color image using the silver halide color photographic light-sensitive material is also disclosed.

Abstract: Impact modifiers having high efficiency at low levels and at low temperatures comprising at least three stages, Stage A being a non-crosslinked polymer of at least 70% butadiene and at least 10% lower alkyl (C.sub.2 -C.sub.8) acrylate, Stage B being a polymer of at least 80% styrene, and Stage C containing at least 50% methyl methacrylate and at least 1% alkyl (C.sub.1 -C.sub.4) acrylate, the ratio of Stages A:B:C, excluding optional additional stages, being about 70-85:10-15:10-20, the ratio of stages C:B being at least 1, and Stage A being non-agglomerated are disclosed. Also disclosed are methods of preparing the impact modifier and thermoplastic polymer compositions containing the impact modifier.

Abstract: Powders of thermoplastic resins such as polyethylene homopolymer and ethylene-vinyl acetate copolymer are obtained by agitating molten resin in admixture with water and in the presence of a dispersing amount of a substantially water insoluble ionomer polymer.

Abstract: An analytical element for analysis of a liquid having an interconnected void structure zone positioned on one side of a liquid-impermeable, light-transmissive support, being characterized in that said interconnected void structure zone comprises a bound particulate structure which is a three-dimensional lattice, being non-swellable in the liquid and having interconnected voids with a void volume of 25 to 85% among the particles to provide transport of said liquid, the material for said bound particulate structure being non-swellable in and impermeable to said liquid and said bound particulate structure being constituted of heat-stable, organic polymer particle units having reactive groups with particle sizes of 1 to 350 microns which are chemically bonded directly to each other through said reactive groups in the areas of contact. A method of analysis utilizing the analytical element in immunoassay is also disclosed.

Abstract: The present invention is concerned with the production and use of water-insoluble particulate heteropolymers made by sequential emulsion polymerization in dispersed particles of which a "core" of a polymeric acid is at least partially encased in a "sheath" polymer that is permeable to a volatile base, such as ammonia or an organic amine, adapted to cause swelling of the core by neutralization. The aqueous dispersion of the acid-containing core/sheath particles is useful in making water-base coating compositions wherein it may serve as an opacifying agent when a volatile base is used to at least partially (to a pH of at least 6) neutralize the heteropolymer, microvoids being formed in cores of the swollen particles in the film during the drying thereof.

Abstract: A composition comprising an aromatic polycarbonate, a styrene-butadiene-styrene radial block copolymer and an acrylate copolymer useful in molded articles.

Abstract: Pourable rubber powders comprising particles having an average diameter of from 0.01 to 10 mm which contain, polymerized thereon, a shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20% by weight, based on the rubber, and the core rubber is a latex polymer, the latex particles of which are composed of a core polymer and a sheath polymer, the core and sheath differing in their chemical composition and at least the sheath polymer being a diene or acrylate rubber having glass transition temperatures of below 0.degree. C., and a process for the preparation of such rubber powders, wherein a latex of an approximate rubber is completely broken with the formation of an aqueous suspension of the rubber; from 2 to 20% by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures of above 25.degree. C.

Abstract: Disclosed are improved styrene-butadiene (SBR) core-alkyl acrylate/methacrylate shell-polymer compositions and an improved process for applying patterns to textiles by screen printing employing these polymer compositions as binders. The process for preparing the improved polymers is also set forth. The core comprises an SBR copolymer which contains an antioxidant and is at least partially encased by an integral shell of a copolymer of an alkyl acrylate or methacrylate which is formed by copolymerization with an ultraviolet light stabilizer. When used as binders for screen printing, these compositions produce textiles which exhibit a desirable combination of crock fastness, cyclic aging and hand properties.

Abstract: Particle size distribution in elastomeric latex preparations is advantageously controlled and improved by treatment of the prepared latex with an agglomerating agent (AgAg) copolymer having an elastomeric "core" and grafted thereto a "shell" of interpolymer comprising polymerized acid and ester comonomers. The grafted interpolymer can beneficially be a polymerized mixture of ethyl acrylate and methacrylic acid. Agglomerated latex product can be recovered for direct utilization of its favorably particle size-distributed elastomeric component or for other purposes such as grafted polymer blends, ABS and similar products.

Abstract: Paper coating compositions manufactured from a novel latex comprising about 40 to 60 weight percent of heterogeneous polymer particles which have:(1) an initial domain, comprising about 50% by volume of the particle which is a polymer of a monomer composition comprising:(a) From about 55 to about 65 parts by weight of a monovinylidene aromatic monomer;(b) From about 45 to about 35 parts by weight of an aliphatic C.sub.4-6 conjugated diene monomer; and per 100 parts by weight of the total of said monovinylidene aromatic monomer and said aliphatic C.sub.4-6 conjugated diene monomer;(c) from about 0.5 to 5 parts by weight of C.sub.3-5 ethylenically unsaturated carboxylic acid; and(d) from about 0.5 to 5 parts by weight of a C.sub.

Abstract: Star-block copolymers having functional groups associated with the nucleus of the copolymers have been prepared. The copolymers of from 10-90% by weight of a monovinyl aromatic compound and 10-90% by weight of a conjugated diene have at least 3 arms connected to a polyvinyl aromatic nucleus and up to the same number of polar functional groups attached to said nucleus as there are arms attached thereto.

Abstract: Good extrusion at high reduction ratios is obtained with a non-melt-fabricable tetrafluoroethylene fine powder resin whose particles have an inner portion and an outer portion, each portion being composed of a copolymer of tetrafluoroethylene and a selected comonomer, in which the comonomer content of the copolymer in the inner portion is greater than the comonomer content in the copolymer in the outer portion. Such particles are obtained by polymerizing tetrafluoroethylene and a desired amount of the selected comonomer in an aqueous dispersion medium, then lowering the amount of comonomer available, and continuing the polymerization.