Abstract: Thermoplastic moulding compositions containingA) 5 to 95 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles contain irregular cell-shaped inclusions of resin-forming polymer and the surface of the particles shows such an irregular toothed structure, that for every particle imaged 5 to 30 of such teeth are present, which are distinguished from an idealized round particle (with a diameter d) by a diameter d+d/x with x=3 to 15,B) 95 to 5 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles do not have a pronounced inner structure as in A) and possess a round particle shape wit

Abstract: Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.

Abstract: Thermoplastic moulding compositions comprisingA) 1 to 60 parts by weight of at least one particulate graft rubber polymer of the ABS type which is produced by emulsion polymerisation, in which at least 50% of the graft rubber particles (number) have a structure detectable via transmission electron microscopy photographs in which the individual particles contain irregular cellular inclusions of resin-forming polymer and the surface of the particles has an irregular jagged structure such that 5 to 30 of such peaks are present per depicted particle, which particles differ from an idealised round particle (having a diameter d) by a diameter d+d/x, where x=3 to 15,B) 40 to 99 parts by weight of at least one particulate graft rubber polymer of the ABS type which is produced by solution or bulk polymerisation and which has the morphology which is characteristic of bulk types of ABS, and optionallyC) 0 to 200 parts by weight of at least one thermoplastic, rubber-free resin.

Abstract: Disclosed are (1) an adhesive polypropylene resin composition comprising (a) 50 to 90 parts by weight of a modified polypropylene or a composition containing said modified polypropylene, said modified polypropylene being graft-modified with at least one monomer selected from the group consisting of an unsaturated carboxylic acid from the group consisting of an unsaturated carboxylic acid and a derivative thereof and (b) 10 to 50 parts by weight of a modified polyolefin other than the modified polypropylene or the composition (a), said modified polyolefin being grafted with at least one monomer selected from the group consisting of an unsaturated carboxylic acid and a derivative thereof, and (2) a multi layer laminate body comprising (i) a layer of a polyolefin (ii) a layer of the above-said adhesive polypropylene resin composition and (iii) a layer of a polyamide resin and/or an ethylene/vinyl alcohol copolymer, said layers being laminated in the order of (i), (ii) and (iii).

Abstract: A method of making articles of manufacture, such as automobile bumpers and other components, formed from thermoplastic olefin compositions, having improved resistance to gasoline and other fluids when painted with flexible coatings such as two component polyurethane paints, and the like, are disclosed. The compositions used to form these articles include a thermoplastic olefin such as crystalline polypropylene, crystalline polyethylene or mixtures thereof with a first rubber component of an ethylene propylene diene rubber having a high molecular weight and a second rubber component of an ethylene propylene diene rubber having a low molecular weight, wherein the first rubber component has a molecular weight of 4 to 200 times that of the second rubber component.

Abstract: High performance polymer compositions comprising orthoester or orthocarbonate functionalized olefin polymers and polyphenylene ethers, polyamides or combinations thereof, and the compositions unexpectedly display improved impact resistances and/or decreased delamination.

Abstract: The present invention relates to a process for preparing aqueous binders for aqueous coating compositions by reacting a mixture ofA) 9.9 to 85 wt. % of a hydroxy- and acid-functional poly(meth)acrylate andB) 14.9 to 90 wt. % of a hydroxy-functional, fatty acid-modified polyester withC) 0.1 to 20 wt. % of a diisocyanate having a molecular weight of 140 to 318,to form urethane groups and then dissolving or dispersing the reaction product in water with prior or simultaneous neutralization of at least a portion of the carboxyl groups present, wherein the sum of the percentages of A) to C) add up to 100.

Abstract: High-impact poly(styrene) resins modified with small-particle-size, multi-stage impact modifiers having a crosslinked poly(butadiene) core and a poly(styrene) or other vinylaromatic polymer shell show an improved balance of impact strength, stiffness and surface gloss, and an improved resistance to environmental stress crazing, when compared to conventional high-impact poly(styrene).

Abstract: Thermoplastic olefin compositions having improved fluid resistance when painted with flexible coatings such as polyurethanes paints and the like are disclosed. These compositions include a thermoplastic olefin such as crystalline polypropylene, crystalline polyethylene, or mixtures thereof with a first rubber component of an ethylene-propylene or ethylene-propylene-diene rubber having a Mooney Viscosity of 10-120 and a second rubber component of an ethylene-propylene or ethylene-propylene-diene rubber having a number average molecular weight of between about 1,000 and 10,000.

Abstract: A pregellable adhesive containing several polymers, of which at least one is olefinically unsaturated and the other capable of curing by esterification, prepared in such a way that it cures by two different chemical reaction mechanisms which can be activated successively and catalyzed at least substantially independently of one another.

Abstract: Use of a polymer blend based on a polymerizate of groups of tetrafluoroethylene derivatives as a processing aid for polyvinyl chloride resins, chlorinated polyvinyl chloride resins, polyolefins and styrene-based resins.Use of a polymer blend as a processing aid for polyvinyl chloride resins, chlorinated polyvinyl chloride resins, polyolefins and styrene-based resins and their mixtures, the polymer blend comprising particles of tetrafluoroethylene polymerizate, these particles being totally or partially encapsulated by a styrene-acrylonitrile copolymer, the amount of the said blend used being such that the tetrafluoroethylane polymerizate represents between 0.05 parts by weight and 20 parts by weight per 100 parts by weight of resins and/or polymers processed.

Abstract: A thermoplastic resin composition having excellent characteristics such as impact resistance and coatability is described. The thermoplastic resin composition contains a propylene based polymer and a graft copolymer having an olefin homo/co-polymer portion forming its main chain and a vinyl copolymer portion forming its branched portion. In the graft copolymer, the proportion of the olefin homo/co-polymer portion is 5 to 95% by weight, and the vinyl copolymer portion occupies the remaining weight. The vinyl copolymer portion of the graft copolymer has a hydroxyl group as a functional group. One of the olefin homo/co-polymer portion and the vinyl copolymer portion forms a dispersed phase in the other with a particle size of 0.001 to 10 .mu.m. Consequently, the graft copolymer assumes a multi-phase structure. The thermoplastic resin composition optionally further contains a thermoplastic elastomer.

Abstract: Thermoplastic molding compounds of the ABS type ofA) at least one graft polymer obtainable by emulsion polymerization of styrene and acrylonitrile in a ratio by weight of 90:10 to 50:50, the styrene and/or acrylonitrile being completely or partly replaceable by .alpha.-methyl styrene, methyl methacrylate or N-phenyl maleic imide, in the presence of at least two butadiene polymer latices of type (A) and (B), of which each contains 0 to 50% by weight of another vinyl monomer in copolymerized form, the ratio by weight of the monomers used to the butadiene polymers used being 25:75 to 70:30, andB) at least one copolymer of styrene and acrylonitrile in a ratio by weight of 90:10 to 50:50, the styrene and/or acrylonitrile being completely or partly replaceable by .alpha.-methyl styrene, methyl methacrylate or N-phenyl maleic imide,characterized in that the butadiene polymer latex (A) has a particle diameter d.sub.50 of .ltoreq.250 nm, a width of the particle size distribution (measured as d.sub.90 -d.sub.

Abstract: This invention relates to compositions which are useful as additives in lubricants and fuels, and more particularly, to additives which are chlorine-free or contain only minor amounts of chlorine. More particularly, carboxylic compositions are described which are prepared by reacting a terpolymer derived from a mixture of monomers comprising ethylene, an alpha-olefin containing 3 to about 20 carbon atoms, and a non-conjugated polyene with an alpha,beta-monounsaturated dicarboxylic acid or reactive derivative thereof. These carboxylic compositions may be used in lubricating oil or fuel compositions or may be used to form carboxylic derivative compositions which are useful in lubricating oil and fuel compositions.

Abstract: Elastomeric polypropylenes modified by grafting and blends thereof with isotactic polypropylenes modified by grafting, and the use thereof as compatibilizers or adhesion promoters for blends and metal composites.

Abstract: A high strength conduit for carrying potable water at temperatures of up to about 180.degree. F. comprising a first tubular member having a mating end portion formed from polyvinyl chloride, a second tubular member having a mating end portion also formed from polyvinyl chloride, telescopically received in the mating portion of the first tubular member, a cured adhesive composition joining said mating end portions of the first and second tubular members. The cured adhesive composition is formed from a curable composition comprising a minor proportion by weight of a thermoplastic elastomeric copolymer comprising from about 40 to about 97 weight percent of recurring units of a monovinyl aromatic monomer, from about 1 to about 30 weight percent of recurring units of an .alpha.,.beta.-unsaturated dicarboxylic acid anhydride, from about 1 to about 30 weight percent of recurring units of an .alpha.,.beta.-unsaturated carboxylic acid, and from about 1 to about 40 weight percent of recurring units of a C.sub.1 -C.sub.

Abstract: Syndiotactic polystyrene can be impact-modified by a blend of (a) polystyrene-hydrogenated polybutadiene block copolymers and (b) one or more core/shell modifiers based on a lightly or non-crosslinked rubber core, and with at least one shell or intermediate shell stage which is predominantly polystyrene, to produce a material of higher impact strength than the better value of either additive singly at the same total impact modifier level.

Abstract: The invention provides a thermoplastic resin composition uniformly and permanently rendered antistatic which comprises (A) 100 parts by weight of a thermoplastic resin, (B) 3-30 parts by weight of a cationic copolymer comprising 80-98 mol % of an ethylene unit and 2-20 mol % of a cationic unit and having a weight-average molecular weight of 1,000-50,000, and (C) 0.

Abstract: A polyethylenic resin composition comprising: at least one high density polyethylenic resin selected from (a) a high density polyethylenic resin (Resin A) and (b) a modified high density polyethylenic resin as derived by grafting on the Resin A a monomer of unsaturated carboxylic acid or its derivative (Resin B), at least one linear low density polyethylenic resin selected from (c) a linear low density polyethylenic resin (Resin C) and (d) a modified linear low density polyethylenic resin as derived by grafting on the Resin C the monomer as described in (b) above (Resin D), and (e) a linear very low density polyethylenic resin (Resin E) having a density (g/cm.sup.3) of at least 0.890, but less than 0.910, and a melting point of 110.degree. to 125.degree. C. This polyethylenic resin composition is excellent in fuel oil resistance, low temperature impact resistance, and heat resistance, and provides a material having affinity or adhesive properties to various resinous and metallic materials.

Abstract: A homogeneous polyolefinic blend and a preparation process thereof, are provided wherein the blend comprises polyolefin and a polymer which has a barrier property to organic liquid and vapor permeability. The barrier property is improved through the inclusion of mixed compatibilizing substances comprising an alkylcarboxyl-substituted polymer and reactive low molecular weight compounds. The compatibilizing substances are included by the means of ordinary processing equipment. The polymer with the barrier property having low organic liquid and vapor permeability is distributed as a multitude of thin, wide, disc-like layers in a polyolefin phase. The compatibilizing substances minimize the interfacial energy between the two polymers to adhere them together.

Abstract: A process is provided for agglomerating small rubber particles in an aqueous latex to form large rubber particles. The process involves the addition of a water soluble organic acid and a water soluble organic anhydride to the latex prior to agglomeration of the rubber particles to facilitate agglomeration of the rubber particles into large rubber particles which are essentially free of coagulum. The latex of large rubber particles is useful in the preparation of ABS polyblends.

Abstract: A resin composition containing graft copolymer having at least one isocyanate group and 10,000 to 20,000 number-average molecular weight or high-molecular-weight polymer having at least one isocyanate group and 10,000 to 200,000 number-average molecular weight, and low-molecular-weight polymer having or not having an isocyanate group and 500 to 8,000 number-average molecular weight. This resin composition has tackiness at ordinary temperature, and long pot life. It can be used for reactive hot melt type adhesives (which can omit hot press process), reactive hot melt type pressure-sensitive adhesives, or coating material.

Abstract: A polystyrene based composition is provided having high impact strength and gloss. The gloss is particularly noted when the resin is molded into plastic articles, especially at relatively cooler temperatures, such as 80.degree. F. to 100.degree. F. The composition contains three resins. The first resin comprises polystyrene and rubber particles smaller than 1.0 micron, such as 0.2 to 0.6 microns. The second resin comprises polystyrene and rubber particles larger than 1.0 micron. The third resin preferably is a block copolymer of styrene and butadiene. Unexpectedly, the third resin improves the gloss achieved by the overall composition.

Abstract: Thermoplastic molding materials preparedA) from 35 to 99.5% by weight of a matrix copolymer (A) ofa.sub.1) from 50 to 95% by weight of styrene and/or .alpha.-methylstyrene,a.sub.2) from 5 to 50% by weight of acrylonitrile anda.sub.3) from 0 to 20% by weight of further comonomersB) from 0 to 50% by weight of a particulate graft copolymer (B) which is insoluble in (A), has a median particle diameter of from 0.03 to 1 .mu.m and preparedb.sub.1) from 30 to 80% by weight of a core comprising an elastomeric polymer having a glass transition temperature of less than -10.degree. C. andb.sub.2) from 20 to 70% by weight of a graft shell comprising a polymer which is compatible or partly compatible with (A)andC) from 0.5 to 30% by weight of a particulate crosslinked copolymer (C) which is insoluble in (A), has a median particle diameter of from 0.5 to 50 .mu.m and comprisesc.sub.1) from 50 to 89.95% by weight of styrene and/or .alpha.-methylstyrene,c.sub.2) from 10 to 50% by weight of acrylonitrile,c.sub.3) from 0.

Abstract: A hot melt pressure sensitive adhesive composition comprising a tackified ethylene-propylene rubber modified with a copolymer of a styrene ethylene-propylene block copolymer and/or a styrene ethylene -butylene block is provided. The pressure sensitive adhesive exhibits high cohesive strength and adhesion to polar and apolar surfaces.

Abstract: Transparent methacrylate-acrylonitrile-butadiene-styrene (MABS) thermoplastic copolymers may be provided with electrostatic dissipative (ESD) properties, while maintaining or enhancing physical properties of the MABS, such as impact strength, by blending the MABS with an inherently antistatic thermoplastic urethane copolymer which is the reaction product of a hydroxy-terminated polyalkylene ether oligimer, a C.sub.2 -C.sub.6 alkanediol and an aromatic diisocyanate, and compatibilizing the blend of MABS and urethane with an acrylonitrile-butadiene-styrene rubbery copolymer produced by emulsion polymerization containing at least 40 weight percent butadiene monomer and a ratio of styrene to acrylonitrile which will produce a rubbery copolymer having a refractive index in the range of about 1.53 to 1.55. All three copolymer components of the transparent blend have refractive indices in the range of about 1.53 to 1.55.

Abstract: The epoxidation of alkyds containing anhydrides or diacids with cycloaliphatic unsaturation results in epoxy resins which cure rapidly in UV light to produce uniform films without the use of flow modifiers. The fatty acid portion of the alkyd functions as an internal plasticizer. Crosslinking occurs through oxirane rings in both the anhydride and fatty acid moieties of the alkyd to produce hard, but not brittle films. Excellent water resistance is obtained without thermal post curing.

Abstract: Poly(vinyl chloride), when impact modified with a core/shell impact modifier whose shell is predominantly formed from a C.sub.1 to C.sub.4 alkyl methacrylate and whose core is a copolymer of butyl acrylate and a specific compositional range of certain higher alkyl acrylate monomers, exhibits improved toughness, especially at lower use levels of the modifier or lower test temperatures for the blend, than when the core of the impact modifier is either substantially formed from butyl acrylate alone or substantially formed from the higher alkyl acrylate alone.

Abstract: A thermoplastic composition is provided which exhibits the combined properties of high gloss, reduced viscosity, desirable levels of dart impact strength and reduced levels of opacity. The compositions contain respective amounts of a bulk vinyl aromatic-vinyl cyanide-rubber graft copolymer, an emulsion vinyl aromatic-vinyl cyanide-rubber graft copolymer, a high molecular weight vinyl aromatic-vinyl cyanide rigid copolymer, and a low molecular weight vinyl aromatic-vinyl cyanide rigid copolymer. The emulsion graft copolymer utilizes as the rubber a vinyl aromatic-diene rubber. The thermoplastic compositions are useful for making molded articles exhibiting high gloss and desired levels of dart impact strength and opacity.

Abstract: ABS polymer compositions consisting ofA) 5 to 80 parts by weight of at least one ABS polymer prepared by mass polymerization or solution polymerization, having rubber particles with an average particle diameter of from 800 to 15,000 nm and a rubber content of from 1 to 20% by weight,B) 1 to 50 parts by weight of at least one ABS polymer prepared by emulsion polymerization, having an average particle diameter of from 50 to 500 nm and a rubber content of from 20 to 80% by weight,C) 0 to 70 parts by weight of at least one thermoplastic vinyl resin prepared by radical polymerization of at least two monomer components selected from styrene, .alpha.-methylstyrene, methyl methacrylate, acrylonitrile, N-phenylmaleimide andD) 0.5 to 10 parts by weight of at least one polybutadiene prepared by emulsion polymerization, having an average particle diameter d.sub.50 in the latex form of from 80 to 500 nm and a gel content of from 10 to 95% by weight.

Abstract: The invention relates to a mixture of(A) ABS graft polymer and(B) 0.05 to 2% by weight (based on the mixture) of a polyether- or polyester-grafted siliconewith improved surface gloss.

Abstract: A surface film exhibiting excellent surface tension values, improved notched bar impact strength and minimal white cracking comprising a thermoplastic containing an ABS copolymer and a polycaprolactone.

Abstract: Adhesive blends having special utility in the formation of composite structures with LDPE, EVOH, and impact-modified polystyrene comprise a mixture of an ethylene/ester copolymer such as EVA, polystyrene, such as impact-modified polystyrene, and a functionalized SEBS block copolymer.

Abstract: The invention relates to an adhesive resin composition comprising an ethylene polymer having a melting point of 70 to 132.degree. C., a density of 0.88 to 0.94% g/cm.sup.3 and a melt flow rate (MFR) of 0.05 to 50 g/10 min. and/or a modified product thereof with an unsaturated carboxylic acid or its derivative (component A); a tackifier (component B); and a block copolymer containing at least one polymer block mainly composed of a vinyl aromatic hydrocarbon and at least one polymer block mainly composed of a conjugated diene or a hydrogenated product thereof (component C). This composition is useful as an adhesives showing excellent adhesion over a wide temperature range as well as processability by film molding, sheet molding, blow molding, etc. It is available for laminates comprising various kinds of resins such as polyolefins, styrenic resins, polyesters, acrylic resins and polyamides.

Abstract: The present invention relates to;a method for surface treating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less, said molded article being obtained from a polypropylene resin composition which comprises:(A) 15-92% by weight of a crystalline propylene-ethylene block copolymer resin,(B) 5-40% by weight of an ethylene-propylene copolymer rubber,(C) 1-15% by weight of a hydroxyl group-containing propylene oligomer, and(D) 2-30% by weight of an inorganic filler;a method for paint-coating a polypropylene resin composition molded article, which comprises irradiating a molded article with ultraviolet light having an irradiation wavelength of 300 nm or less and coating the irradiated surface with a paint, said molded article being obtained from a polypropylene resin composition which comprises said components (A), (B), (C) and (D) above-mentioned; anda paint-coated article obtained by said method for

Abstract: Process for the preparation of grafted polyolefins in a fluidized bed fluidized by means of steam and, if appropriate, alcohols.

Abstract: Reduced gloss polycarbonate graft polymer blends are provided by a process which involves compounding styrene-acrylonitrile copolymer in the presence of an electrophilic reagent and preferably an acid to form gels, and then compounding the resultant gels with polycarbonate, a styrene-acrylonitrile copolymer and ABS graft polymer to form reduced gloss PC/ABS/SAN composition. The process limits side reactions during gel formation by preparing the gels first and then compounding the gels with the other resin materials. The blends are useful as molding resins and the gelled acrylonitrile polymer is useful as a gloss reducing additive.

Abstract: A rubber-reinforced styrene resin composition consisting essentially of:(1) 2-30% by weight of a grafted rubbery polymer wherein less than 30 parts by weight of a polymer of at least an aromatic alkenyl compound and an alkenyl cyanide compound are grafted onto 100 parts by weight of a conjugated diene rubber (I) having a weight average particle size of 0.26-0.6 .mu.m and a gel content of 30-80% by weight;(2) 5-40% by weight of a grafted rubbery polymer wherein 30 parts by weight or more of a polymer of at least an aromatic alkenyl compound and an alkenyl cyanide are grafted onto 100 parts by weight of a conjugated diene rubber (II) having a weight average particle size of 0.26-0.6 .mu.m and a gel content of 30-80% by weight; and(3) 40-93% by weight of a styrene copolymer of a monomer component consisting of at least one aromatic alkenyl compound and an alkenyl cyanide compound, and the difference between grafting degree of the component (1) and the grafting degree of component (2) being 15% by weight or more.

Abstract: A polymer alloy is provided which comprises:(I) from 10-50 parts by weight of an impact resistant styrene acrylate alloy which comprises (i) from 90 to 30 parts by weight of a brittle polymer (e.g. a styrene/alkyl (meth)acrylate copolymer, optionally with a (meth)acrylic acid comonomer), (ii) from 3 to 50 parts by weight of a rubbery polymer (e.g. a styrene/conjugated diolefin linear, tapered, radial di-block or tri-block copolymer), and (iii) from 15 to 67 parts by weight of a ductile polymer (e.g. a a styrene/conjugated diolefin linear, radial di-block or tri-block copolymer), and(II) from 90 to 50 parts by weight of an impact modified styrene polymer.The resulting polymer blends have good impact strength, tensile strength and gloss.

Abstract: A polypropylene resin composition, which exhibits an excellent coating adherence, high rigidity, high impact strength at low temperatures, prominent heat resistance and excellent appearance of moldings as required for coatings on the exterior parts of automobiles even without effecting a treatment with trichloroethane as pretreatment step before coating and without a primer as undercoating and which can be baked at a temperature of 130.degree. C. or higher, comprises 15 to 92% by weight crystalline ethylene propylene block copolymer, 5 to 40% by weight ethylene propylene copolymer rubber, 1 to 15% by weight polypropylene oligomer containing hydroxyl group, and 2 to 30% by weight inorganic filler.

Abstract: A thermoplastic resin composition comprising (A) 100 parts by weight of a diene rubber-containing styrene resin, (B) from 1 to 50 parts by weight of a vinyl resin-containing acrylic rubber polymer obtained by polymerizing from 1 to 200 parts by weight of at least one vinyl monomer in the presence of 100 parts by weight of an acrylic rubber polymer, and (C) from 0 to 48 parts by weight of a polymer of a vinyl monomer having a weight average molecular weight of at least 200,000, provided that the sum of components (B) and (C) is from 1 to 60 parts by weight.

Abstract: A partially dynamically vulcanized or crosslinked thermoplastic polyolefin elastomer/uncrosslinked olefin polymer blend has improved extrusion performance. The uncrosslinked olefin polymer is selected from (1) a heterophasic olefin composition prepared by polymerization in at least two stages comprising (a) 10% to 50% by weight of a propylene homopolymer or a propylene copolymer, (b) 5% to 20% by weight of a semicrystalline, essentially linear ethylene copolymer fraction, and (c) 40% to 80% by weight of an ethylene copolymer fraction that is soluble in xylene at ambient temperature, (2) crystalline butene-1 homopolymer, and (3) a substantially amorphous ethylene/propylene or ethylene/butylene copolymer; or a substantially amorphous terpolymer of (a) ethylene, (b) propylene or butylene, and (c) a nonconjugated diene.

Abstract: A molding of an ABS-based resin is described. Rubber particles located at a depth of 0.5-1.5 .mu.m from a surface of the molding morphologically comprise at least the following two types of particles:(1) A particles having an a/b ratio not greater than 1.5, wherein a and b represent a major axis and a minor axis, respectively, and(2) B particles having an a/b ratio not smaller than 5, wherein a and b have the same meanings as defined abovewhen a section extending at the depth in parallel with the surface of the molding is observed in an electron micrograph taken by the ultrathin sectioning technique. Assuming that the total area of the rubber particles as observed in the electron micrograph is 100%, the total area of the A particles accounts for at least 10% and that of the B particles is in a range of 0.01-90%.

Abstract: The present invention relates to an impact resistant polystyrene composition which comprises an (A) styrenic polymer having syndiotactic configuration and a (B) rubbery elastomer modified by a modifier having a polar group, or to an impact resistant polystyrene composition which comprises the aforesaid composition and a (C) rubbery elastomer and/or a (D) poly(phenylene ether).The polystyrene compositions according to the present invention are excellent in heat resistance, modulus of elasticity, impact resistance and extensibility and thus are expected to find effective use for molding electric and electronic materials, industrial construction materials, automobile part, domestic electrical appliances, industrial materials such as various machine parts, etc.

Abstract: The invention relates to a recycable, heat-sealable plastic film for hermetically sealing plastic containers, comprising at least two layers which mutually adhere, (i) a support layer comprised of an impact resistant polystyrene resin and (ii) a sealing layer consisting essentially of: a) 20-100 weight % of a copolymer P consisting essentially of:(p1) 20-90 weight % methyl methacrylate and/or ethyl methacrylate;(p2) 10-80 weight % of at least one monomer of formula I ##STR1## where R.sub.1 represents an C.sub.3-24 alkyl group; and (p3) 0-10 weight %, preferably 1-8 weight %, of a monomer which is copolymerizable with and different from the monomers (p1) and (p2); and(b) 0-80 weight % of a block copolymer containing styrene blocks.

Abstract: A polymer composite having excellent mechanical properties such as shock resistance, and good adhesiveness is obtained by polymerizing a vinyl monomer in the presence of a rubber-like copolymer and a thermoplastic resin without a substantial amount of a solvent. The polymer composite contains a matrix phase which comprises the thermoplastic resin and a graft copolymer formed from the resin and the vinyl monomer, and a dispersed phase which comprises the polymer of the vinyl monomer and a graft polymer formed from the vinyl monomer and the rubber-like copolymer. Preferably the reaction is carried out by kneading the vinyl monomer, the rubber-like copolymer and the thermoplastic resin with a high shearing force and removing an unreacted vinyl monomer. A single screw vent-extruder or a twin screw vent-extruder may be used for kneading. The polymer composite is useful for making a formed article and as a binder in a laminate.

Abstract: A method for producing a molded heat-resistant resin product, which comprises injection-molding a thermoplastic resin (A) and a rubber-reinforced heat-resistant resin (B) having a high temperature side glass transition temperature, the difference of which from the high temperature side glass transition temperature of said thermoplastic resin (A) is within 60.degree. C., simultaneously as they are.

Abstract: The invention is a recycling process for forming a thermoformable polymer blend comprising:A) from 9 to 90 parts by weight of a monovinylidene aromatic polymer or an impact modified monovinylidene aromatic polymer, comprising from 1 to 25 weight percent of a rubber and 75 to 99 weight percent of a monovinylidene aromatic polymer matrix having a weight average molecular weight (M.sub.w) from 50,000 to 400,000, said weight percents being based on the total weight of said impact modified, monovinylidene aromatic polymer;B) from 9 to 90 parts by weight on an olefin polymer, selected from the group consisting of homopolymers of ethylene or propylene and copolymers of ethylene with one or more C.sub.

Abstract: A process for producing a maleimide-modified heat-resistant ABS resin comprising a maleimide copolymer, an ABS graft copolymer and an AS copolymer, which comprises kneading a maleimide copolymer, an ABS graft copolymer and optionally an AS copolymer to obtain a heat-resistant master batch resin, and further kneading an ABS graft copolymer and an AS copolymer to the heat-resistant master batch resin or kneading a resin composed of an ABS graft copolymer and an AS copolymer, to the heat-resistant master batch resin.

Abstract: The subject invention relates to a process for preparing a compatibilized blend of a first polymer which is a rubber containing free nitrile groups, hydroxyl groups, carboxyl groups, amide groups, amine groups or mercapto groups and a second dissimilar polymer which is a thermoplastic polymer containing nitrile groups, hydroxyl groups, carboxyl groups, amide groups, amine groups or mercapto groups, which comprises reacting a rubber having pendant blocked isocyanate groups bound thereto with the first polymer and the second dissimilar polymer, wherein the compatibilized blend contains from about 55 weight percent to about 75 weight percent of the rubber containing nitrile groups, hydroxyl groups, amide groups, amine groups or mercapto groups.