Abstract: This invention relates to a method for manufacturing an olefinic thermoplastic elastomer composition, characterized by disposing specific kneading segment at least at one place of the screw on the occasion of manufacturing an olefinic thermoplastic elastomer composition comprising a polyolefin resin and a crosslinked rubber by dynamic crosslinking with a twin screw extruder.

Abstract: The present invention provides an adhesion promoting agent which includes a graft copolymer formed by a halogenated polyolefin polymer with at least one reactive functionality and a substantially saturated hydrocarbon polymer having more than one reactive functionality. At least one reactive functionality of the saturated hydrocarbon polymer is reactive with the reactive functionality of the halogenated polyolefin to form the graft copolymer of the invention.

Abstract: A low-gloss biaxially oriented polymer film containing a vinyl aromatic polymer and substantially non-spherical rubber particles is useful for window film applications. The rubber particles, when unconstrained, are essentially spherical and have a rubber particle size of 2.5 micrometers or more.

Abstract: The residual chlorine content of a polyolefin-substituted carboxylic acylating agent formed by a chlorine-assisted reaction of a polyolefin and an &agr;,&bgr;-unsaturated carboxylic reactant can be reduced by heating the polyolefin-substituted carboxylic acylating agent having a residual chlorine content in the presence of an &agr;,&bgr;-unsaturated carboxylic reactant, optionally in the further presence of a sulfonic acid. Residual chlorine content can be further reduced by using, in the reaction of the polyolefin &agr;,&bgr;-unsaturated carboxylic reactant, a high speed mixer provided with a dual pitch blade.

Abstract: Silane-modified polyvinyl acetals are obtained by copolymerizing a) vinyl esters of C1-15 alkylcarboxylic acids having from 1 to 15 carbon atoms, and optionally (meth)acrylates C1-15 of alcohols, olefins, dienes, vinylaromatics, or vinyl halides, with b) from 0.02 to 20.0% by weight of an ethylenically unsaturated, hydrolyzable silicon compounds or hydrolyzable mercaptosilanes; hydrolyzing the resulting vinyl ester copolymers to 50 mol % or more of vinyl alcohol units; and acetalizing vinyl alcohol units with a C1-15 aliphatic or aromatic aldehydes, wherein from 5 to 50% by weight of a mixture of comonomers a) and silane comonomers b), based on the total weight of comonomers a) and b), is used as an initial charge, and the remainder is metered in during polymerization, such that the ratio between the comonomers a) and silane comonomers b) remains constant throughout the polymerization, resulting in a homogeneous polymer.

Abstract: It is an object of the present invention to provide a method of coating a plastic molding which is appropriately applicable to various plastic substrates, an ultraviolet-curable under coating for metal evaporation, which is to be used in that method of coating, and a plastic molding obtained by that method of coating.

Abstract: The present invention provides a vinyl chloride resin composition having excellent mechanical properties. The vinyl chloride resin composition comprises a chlorinated polyolefin and a resin composition containing a vinyl chloride resin and a polyolefin resin, in which 1 to 30 parts by weight of the chlorinated polyolefin is included relative to 100 parts by weight of the resin composition including 50 to 99 parts by weight of the vinyl chloride resin containing 0 to 50% by weight of a plasticizer and 1 to 50 parts by weight of the polyolefin resin, and in which the chlorinated polyolefin has a heat of fusion of 10 to 100 J/g, which is measured in accordance with a DSC method, and includes 35 to 60% by weight of chlorine in amorphous portions thereof.

Abstract: To provide a thermoplastic polyester resin composition which has a very good durability to alkaline solutions for a long period of time. That is, a thermoplastic polyester resin composition, wherein a thermoplastic polyester resin (A) is compounded with 1-25% by weight (in the total composition) of impact resistance rendering materials (B), 0.1-15% by weight (in the total composition) of a silicone compound and/or a fluorine compound (C), 1-50% by weight (in the total composition) of an inorganic filler (D), and 0.1-10% by weight of at least one polyfunctional compound (E) selected from the group consisting of an epoxy compound, an isocyanate compound and a carboxylic acid dianhydride. A molded article of the present invention has anti-stress properties even in a weld part thereof.

Abstract: A thermoplastic rubber composition prepared by crosslinking 1-99 parts by weight of a crosslinkable rubbery polymer (A) and 1-99 parts by weight of a polypropylene resin (B) (total amount of (A) and (B) being 100 parts by weight), wherein said (B) comprises a polypropylene resin (B-1) characterized by generation of a torque higher than Mo after melting and a polypropylene resin (B-2) characterized by generation of a torque not higher than Mo after melting, in a melting test of said (B) in the presence of an organic peroxide (temperature condition being at 200° C.), and Mo being a torque right after complete melting.

Abstract: Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer formed of tetrafluoroethylene (TFE) homopolymers or copolymers, wherein the average particle sizes of the semicrystalline fluoropolymer latex range from 10 to 100 nm.

Abstract: Chlorotrifluoroethylene (CTFE) thermoplastic perhalogenated polymers, formed by the following polymer components: (I) 10-90% by weight of a CTFE homopolymer and (II) 90-10% by weight of a CTFE copolymer modified with comonomer (a) selected from one or more perfluoroalkyl vinylethers having the formula: Rf—O—CF═CF2 wherein: Rf is a C2-C5 perfluoroalkyl group, resulting in the final polymer (I)+(II), the amount of (a) being from 0,2 to 5% by moles and the CTFE the remaining part to 100% by moles.

Abstract: A thermosetting powder paint composition comprising (A) a resin composition component, (B) a hardener component and (C) a solid flow controlling component, wherein the component (A) contains a resin composition component having reactivity with the component (B), the component (B) contains a hardener having reactivity with the component (A), the component (C) contains a vinyl polymer which is solid at 20° C., and the relation between SPA of the component (A) and SPC of the component (C) satisfies the following numerical formula (1) and the following numerical formula (2) simultaneously. By this constitution, excellent blocking-resistance in storing as the powder paint composition and excellent appearance properties of a paint film formed by coating the powder paint composition can be simultaneously manifested. 8≦SPA≦13  (1) 7≦SPC≦SPA  (2).

Abstract: A relatively small amount of a plasticizer having an SP value of at least 8.8 and a molecular weight of at most 550 is added to blend rubber of NBR-PVC in which NBR has an AN content of from 43 to 50% by weight. The fuel impermeability and the low-temperature flexibility of the resulting rubber composition are improved to be comparable to those of FKM, and the amount of the plasticizer and its reaction product to be released from the rubber composition in fuel is reduced. Adding a controlled amount of carbon black to the rubber composition makes the composition have favorable electroconductivity. The rubber composition is formed into hoses or electroconductive hoses of low fuel permeation.

Abstract: Blocky chlorinated polyolefins are disclosed as compatibilizers of PVC and/or CPVC resins with polyolefin elastomers. The blocky chlorinated polyolefins facilitate the dispersion of the elastomers as a dispersed phase with the proper size for impact modification of the PVC and/or CPVC. The blocky chlorinated polyolefin provides better adhesion between the elastomer and the PVC and/or CPVC providing better physical properties such as impact strength as measured by Notched Izod and variable height impact testing (VHIT) than did the randomly chlorinated polyolefins, often used as processing aids and as impact modifiers in PVC or CPVC. The differences in properties achieved with blocky chlorinated polyolefins versus randomly chlorinated polyolefins are attributed to the individual blocks of the blocky polyolefin being compatible (and/or co-crystalizable) with either the polyolefin elastomer or the PVC/CPVC resulting in better adhesion between phases.

Abstract: A thermoplastic elastomer composition comprising 100 by weight of a chlorinated polyethylene, from 5 to 1,000 parts by weight of a crystalline polyolefin resin and from 20 to 1,500 parts by weight of a rubber component, wherein the rubber component is a hydrogenated styrene type rubber or an olefinic rubber which has a Mooney viscosity [ML1+4(100° C.)] within a range of from 50 to 350.

Abstract: Blocky chlorinated polyolefins are disclosed as compatibilizers of PVC and/or CPVC resins with polyolefin elastomers. The blocky chlorinated polyolefins facilitate the dispersion of the elastomers as a dispersed phase with the proper size for impact modification of the PVC and/or CPVC. The blocky chlorinated polyolefin provides better adhesion between the elastomer and the PVC and/or CPVC providing better physical properties such as impact strength as measured by Notched Izod and variable height impact testing (VHIT) than did the randomly chlorinated polyolefins, often used as processing aids and as impact modifiers in PVC or CPVC. The differences in properties achieved with blocky chlorinated polyolefins versus randomly chlorinated polyolefins are attributed to the individual blocks of the blocky polyolefin being compatible (and/or co-crystalizable) with either the polyolefin elastomer or the PVC/CPVC resulting in better adhesion between phases.

Abstract: These articles relate to rubber compositions and laminates thereof. The laminates bring together materials not easily bonded to each other. The compositions comprise rubber and a resin component containing ethylene-vinyl acetate copolymer (EVA). The laminates are useful for providing a protective covering such as shelf or drawer liners.

Abstract: The present invention pertains to structures and fabricated articles having shape/reshape behavior (and processes for their preparation) comprising;(A) from about 1 to 100 wt % (based on the combined weights of Components A and B) of at least one substantially random interpolymer having an I.sub.2 of 0.1 to about 1,000 g/10 min and an M.sub.w /M.sub.n of from about 1.5 to about 20, which comprises;(1) from about 38 to about 65 mol % of polymer units derived from;(a) at least one vinyl or vinylidene aromatic monomer, or(b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or(c) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and(2) from about 35 to about 62 mol % of polymer units derived from ethylene and/or at least one C.sub.3-20 .alpha.

Abstract: The present invention relates to blend compositions comprising;(A) of from about 1 to about 99 weight percent based on the combined weights of Components A, B and C of at least one substantially random interpolymer; and wherein said interpolymer;(1) contains of from about 0.5 to about 65 mole percent of polymer units derived from;(a) at least one vinylidene aromatic monomer, or(b) at least one hindered aliphatic vinylidene monomer, or(c) a combination of at least one vinylidene aromatic monomer and at least one hindered aliphatic vinylidene monomer;(2) contains of from about 35 to about 99.5 mole percent of polymer units derived from at least one aliphatic .alpha.-olefin having from 2 to 20 carbon atoms;(3) has a molecular weight (Mn) greater than about 1,000;(4) has a melt index (I.sub.2) of from about 0.01 to about 1,000;(5) has a molecular weight distribution (M.sub.w /M.sub.n) of from about 1.

Abstract: There is disclosed a resin composition comprising about 99-1% by weight of a vinyl chloride resin and about 1-99% by weight of a copolymer of about 30-70 mol % N-substituted maleimide structural unit and about 70-30 mol % olefinic structural unit. The composition has excellent forming and molding properties and provides formed or molded products of improved heat resistance and mechanical properties.

Abstract: A sound insulating membrane and processes for forming, particularly well suited for use in floor, ceiling and wall constructions. The membrane comprises at least one backing layer in contact with a layer of nonfoam polymeric material. The polymeric material has an elongation factor of about 500% to about 900% and a Shore A hardness of from about 65 to about 80 points, 5 seconds. In a preferred embodiment, the polymeric material comprises 40-70% chlorinated polyethylene, 20-30% ethylene vinyl acetate, and up to 10% polyvinyl chloride. Floor, ceiling and wall constructions and related methods utilizing the sound insulating membranes are also disclosed.

Abstract: A composition, suitable for use in producing a tire carcass, is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene; a rubber such as a blend of natural rubber and a copolymer of styrene and butadiene; carbon black, and a plasticizer oil. Tires comprising carcasses made of the composition are also provided.

Abstract: The improved phenol derivatives having a phenolic structure as part of the molecular backbone are produced by reacting condensed polycyclic aromatic hydrocarbons, either individually or in combination with unsaturated cyclic aliphatic hydrocarbons, with phenols in the presence of Friedel-Crafts catalysts and have softening points of no more than 150.degree. C., number average molecular weights of 250-800 and phenolic hydroxyl equivalents of 140-850 g/eq. These phenol derivatives are useful either as starting materials for the manufacture of heat-resistant thermosetting resins or as modifiers thereof. They can be produced by reacting the indicated components in the presence of Friedel-Crafts catalysts, typically a mixture of hydrogen fluoride and boron trifluoride, at temperature of 0-350.degree. C.

Abstract: A novel polyalkyl ether/polyaryl ether sulfone or ketone copolymer and a specific polyether ester copolymer are useful for producing a medical material to be used to contact the blood; and methods for producing the medical material comprising said polyalkyl ether/polyaryl ether sulfone or ketone copolymer or a specific polyether ester copolymer.

Abstract: The present invention provides self-fusing, or self-amalgamating, compositions comprising rubber blends, preferably formed into a tapes, which, after being elongated and, for example, wrapped around a substrate, fuse together to form a continuous layer. In preferred aspects of the invention, the composition comprises a partially pre-crosslinked polyisoprene, a halogenated polyisobutylene, a medium molecular weight polyisobutylene, a non-extractable plasticizer and a mineral filler.

Abstract: The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of monomer units derived from at least one a-olefin, (b) from 30 to 70 weight percent of monomer units derived from at least one vinylidene aromatic compound, and (c) from 0 to 15 weight percent of monomer units derived from at least one diene. The subject invention further provides a thermoplastic vulcanizate comprising the thermoset elastomers of the invention as provided in a thermoplastic polyolefin matrix. The subject invention further provides processes for preparing the inventive thermoset elastomers and thermoplastic vulcanizates, as well as parts fabricated therefrom. The inventive materials have a superior balance of properties, as compared to EPM and EPDM based materials. The subject invention also pertains to foams and methods for their preparation.

Abstract: An electrostatic toner receptor layer comprised of a blend of a terpolymer of methyl methacrylate/ethyl acrylate and N-t-butyl acrylamide, a vinyl resin, a chlorinated rubber or polyurethane dispersion rubber and a plasticizer. The resulting receptor layer provide durability and flexibility when applied to a crack resistance film for subsequent application to soft-sided vehicles.

Abstract: A styrenic thermoplastic resin composition comprising a mixture of: (A) 50-90 wt % of a styrenic polymer; (B) 5-35 wt % of a chlorinated polyethylene; (C) 5-35 wt % of a modified ethylene-propylenic rubber; and (D) 0-10 wt % of vinyl graft copolymer has superior weather resistance and mechanical properties such as impact strength and tensile properties. The resin composition also provides improved layer peeling tendency which is one of the most troublesome problems in conventional resins such as acrylonitrile-chlorinated polyethylene-styrene resins.

Abstract: A thermoplastic elastomer composition comprising from 99 to 1 wt % of a thermoplastic polyester elastomer comprising high melting point polyester segments and low melting point polymer segments, and from 1 to 99 wt % of a chlorinated polyethylene having a chlorination degree of from 20 to 45 wt % and a heat of crystal fusion of from 5 to 35 cal/g as measured by a DSC method.

Abstract: Vinylidene fluoride copolymers having a melting temperature below about 160.degree. C. are used to prepare pigmented powder coatings for galvanized steel. The coatings are corrosion-resistant and generally show a high gloss.

Abstract: Chlorinated and chlorosulfonated polyethylenes are produced by chlorinating substantially linear olefin polymers having a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63, a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, a critical shear rate at onset of gross melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear olefin polymer having about the same I.sub.2 and M.sub.w /M.sub.n and at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5 and their method of manufacture are disclosed. The chlorosulfonated polyethylenes are produced by treating the chlorinated polyethylenes with a mixture of gaseous chlorine and sulfur dioxide.

Abstract: A heat seamable flame retardant sheet material for roofing prepared from an uncured polymeric composition of matter which comprises 100 parts by weight of a polymer blend comprising from about 50 to 90 parts by weight of halogenated polyolefins having up to about 2 percent by weight crystallinity, which polyolefins are prepared from monomers having at least 2 carbon atoms, and mixtures thereof and from about 10 to 50 parts by weight of a highly crystalline thermoplasticity promoter selected from the group consisting of polymeric olefins prepared from monomers consisting of at least two carbon atoms; from about 50 to 250 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof per 100 parts of the polymer blend; from about 20 to 105 parts by weight of a processing material and mixtures thereof, per 100 parts of the polymer blend; and from about 15 to 90 parts by weight of an additive selected from the group consisting of flame retardant ma

Abstract: A resin composition for an electrophotographic toner is here disclosed which comprises an ethylene series high polymer (Y) and an ethylene series polymer (X) prepared from 100 parts of a bifunctional ethylene series unsaturated monomer and 0.01-10 parts by weight of a substance having three or more peroxide groups in the molecule and/or a substance having one or more unsaturated functional groups and one or more peroxide groups in the molecule, Mw/Mb (Mw is weight-average molecular weight, and Mb is weight-average molecular weight between crosslinking points) of said polymer (X) being from 2 to 99, Mw of said polymer (X) being 50,000 or less. This resin composition is excellent in the balance of various physical properties required for the toner, and particularly, it is excellent in offset resistance and toner strength.

Abstract: A composite vinylidene chloride copolymer composition excellent in processability which comprises a vinylidene chloride copolymer A having a molecular weight of not less than 50,000 and not more than 300,000 and a vinylidene chloride copolymer B having a molecular weight of not less than 5,000 and not more than the smaller one of either 0.8 times the weight average molecular weight of the vinylidene chloride copolymer A or 80,000, and a monolayer film which comprises the composite vinylidene chloride copolymer composition and is excellent in various properties including barrier property, non-extractability by oily foods and high frequency sealability, and is suitable as a barrier packaging material and wrapping film used for ham, sausage and other like foods.

Abstract: A thermoplastic elastomer composition comprising 100 parts by weight of a crystalline chlorinated polyethylene with a chlorination degree of from 20 to 45% and a heat of crystal fusion of from 5 to 35 cal/g as measured by a DSC method, obtained by chlorinating a polyethylene having a weight average molecular weight of from 100,000 to 750,000, from 1 to 100 parts by weight of a crystalline polyolefin and from 5 to 200 parts by weight of a plasticizer.

Abstract: A curable halobutyl rubber/polyepihalohydrin rubber blend comprises a cure system consisting essentially of (a) sulfur, (b) sulfur accelerator, (c) zinc-containing promoter, (d) urea or urea derivative vulcanization accelerator and, optionally, (e) di- or tri-mercapto nonsulfur curative such as 2,4,6-trimercapto-1,3,5-triazine. The halobutyl rubber/polyepi-halohydrin rubber blends that are crosslinked with the cure system of this invention exhibit excellent scorch safety and cure rate, as well as a high degree of crosslinking, and are useful in the manufacture of tire inner tubes and inner liners.

Abstract: An elastomeric composition comprising a major proportion by weight of a rubber comprising a halobutyl rubber (e.g. 75 to 95%) and a minor proportion by weight (e.g. 5 to 25%) of a copolymer of an olefin, e.g. ethylene, and an unsaturated carboxylic acid e.g. acrylic acid. This composition may be covulcanised with a general purpose rubber e.g. natural rubber, to which it has adequate adhesion. Thus a natural rubber tyre carcass may be covulcanised with a tyre inner liner formed of this composition.

Abstract: Novel addition polymers and copolymers derived from carbamate-functionalized vinyl monomers, and optionally one or more conventional vinyl monomers such as acrylonitrile and/or styrene, are disclosed. When the addition polymers or copolymers are melt processed with an elastomer containing moieties reactive with amines, novel addition polymer-rubber copolymers are formed which are useful as compatibilizers and impact modifiers in plastic blends, such as AES.

Abstract: Novel, uncured tapes are provided comprising a raw polymer mixture of HDPE, LLDPE or isotactic polypropylene, chlorosulfonated polyethylene rubber, a small amount of a filler or pigment and, optionally, a minor proportion of chlorinated polyethylene rubber or an elastomeric polymer. They are self-bonding when elongated at least about 50% and wrapped on a substrate, and possess various degrees of flame resistance depending on their composition.

Abstract: A golf ball cover includes a blend of natural or synthetic balata and a crosslinkable elastomer such as polybutadiene. The elastomer is thermally crosslinked with a metallic salt of an unsaturated fatty acid, such as zinc diacrylate, and a crosslinking initiator such as organic peroxide.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: Mixtures of polychloroprene and hydrogenated nitrile rubber give vulcanizates combining high modulus with a high dynamic stress absorption capacity.

Abstract: A crosslinked polymer composition obtained by the metathesis polymerization of a dicyclopentadiene monomer in which a chlorinated polymer such as a chlorinated elastomer or chlorinated polypropylene is dissolved; a crosslinked dicyclopentadiene polymer composition comprising a ring-opened dicyclopentadiene polymer and a dicyclopentadiene-soluble chlorinated polymer; and a method for preparing a crosslinked polymer composition comprising adding the chlorinated polymer to one of two reactant liquid streams, one of which contains dicyclopentadiene and a ring-opening metathesis catalyst and the other contains a catalyst activator, combining the two streams, and charging them to a mold or similar forming container in which the dicyclopentadiene polymerizes.

Abstract: Blends of styrene-butadiene rubber and PVC latices in a dry weight ratio of 45:10 to 55:70 are useful to form heat sealable films. The mixture does not contain plasticizers and thus reduces environmental concerns during processing. The resulting film have good clarity and flexibility and may be used to seal textiles, non-wovens and boards.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: A composition suitable for use in producing tire treads, is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene; a rubber, such as, styrene-butadiene rubber, carbon black, and a plasticizer oil. Tires comprising treads made of the composition are also provided.

Abstract: A thermosetting powder coating composition which has good stability, pigment dispersion and impact characteristics is disclosed. The composition comprises a co-reactable particle mixture of an acid group-containing acrylic polymer having a Tg in the range of -20.degree. C. to 30.degree. C., an acid group-containing acrylic polymer having a Tg in the range of 40.degree. C. to 100.degree. C. and a curing agent, therefor.

Abstract: A method for inspecting the quality of modifiers for vinyl chloride type resins which includes kneading, with rolls, a soft vinyl chloride resin composition which is free of modifiers and is composed of a stabilizer, a plasticizer and a light shielding pigment to melt the composition and completely remove fish eyes present in the composition; adding a modifier for vinyl chloride type resins to the melted soft vinyl chloride resin composition; again kneading the mixture and then forming the mixture into a sheet to detect and count the number of fish eyes present in the sheet. This method makes it possible to simply and correctly determine the number of fish eyes of modifiers utilizing a widely used apparatus to thereby perform quality inspection of the modifiers. Moreover, when modifiers for vinyl chloride type resins are used in extrusion molding, the method is particularly effective for inspecting the quality of such modifiers.

Abstract: The invention provides a rubber dispersed copolymer resin having excellent heat resistance, impact strength and moldability and composed of (1) a dispersed phase formed of a rubbery polymer and copolymerized styrene-type, acrylonitrile-type and maleimide-type monomers, said rubbery polymer specificaly controlled occluding the copolymer of monomers, being grafted with the copolymer and/or forming a multicomponent gel together with copolymers, and (2) a continuous phase formed at least of a specifically controlled copolymer of the styrene-type, acrylonitrile-type and maleimide-type monomers. The resin is useful as a molding material for electric appliances, electronic equipment and cars.

Abstract: A method for rendering a flammable polymer material flame-resistant, which comprises incorporating to the flammable polymer material a powder of a cross-linked aromatic polymer brominated to contain from 30 to 70% by weight of bromine.