Abstract: Thermoplastic molding materials contain, based in each case on the sum of components A, B and C,A: from 10 to 90% by weight of a polymer A composed of styrene and/or substituted styrene,B: from 10 to 90% by weight of a polyolefin B andC: from 5 to 40% by weight of a star block copolymer C containing not less than 50% by weight of styrene and prepared by anionic polymerization of styrene and butadiene and/or isoprene, coupling and subsequent selective hydrogenation.

Abstract: A thermoplastic molding material contains, in each case based on the sum of the constituents A, B and C,A: 10 to about 90% by weight of a styrene polymer A,B: 10 to about 90% by weight of a polyolefin B, andC: 1 to 20% by weight of an unsymmetrical linear three-block copolymer C of the structure S.sub.1 -D-S.sub.2, prepared by anionic polymerization from styrene and butadiene and/or isoprene, S.sub.1 and S.sub.2 each denoting a polystyrene block and D denoting a polydiene block,wherein the three-block copolymer C has a styrene content, based on C, of from 50 to 85% by weight and the terminal blocks S.sub.1 and S.sub.2 built up from styrene differ by at least 50% in their molecular weight.

Abstract: Filler-containing thermoplastic molding materials containing, as essential components,A) from 10 to 84% by weight of a thermoplastic polyamide,B) from 10 to 84% by weight of a modified polyphenylene ether,C) from 5 to 40% by weight of a fibrous or particulate filler or a mixture thereof, andD) from 1 to 20% by weight of a zinc sulfide pigment, and, in addition,E) from 0 to 30% by weight of an impact-modifying rubber andF) from 0 to 25% by weight of a flameproofing agent, are described.

Abstract: Thermoplastic molding materials containa) from 20 to 80 parts by weight of a polyphenylene ether,b) from 1 to 20 parts by weight of a block copolymer of the general formula A--B--A' consisting of two polyvinylaromatic blocks A and A' and a partially hydrogenated rubber block B,c) from 0 to 70 parts by weight of a polyvinylaromatic andd) from 0 to 40 parts by weight of conventional additives, the sum of a) to d) being 100 parts by weight, wherethe mean molecular weights of A and A' differ by a factor of from 2 to 20,the shorter block A has a mean molecular weight of from 2,000 to 4,000 andthe blocks A and A' together account for from 35 to 50% by weight of b).

Abstract: Reinforced thermoplastic molding materials containing, as essential components,(A) from 40 to 94 parts by weight of a polymer component of(a.sub.1) from 10 to 90% by weight of polyphenylene ether and(a.sub.2) from 10 to 90% by weight, based in each case on A, of a styrene polymer toughened with an acrylate rubber or with an unhydrogenated or hydrogenated polymer of a conjugated diene,(B) from 1 to 20 parts by weight of a copolymer of(b.sub.1) from 70 to 99.9% by weight of a monomer from the group consisting of styrene, .alpha.-methylstyrene and styrene alkylated in the nucleus or a mixture of these monomers,(b.sub.2) from 0.1 to 30% by weight of one or more compounds from the group consisting of tert-butyl acrylate and tert-butyl methacrylate, or one or more compounds from the group of compounds of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2, R.sup.3 and R.sup.

Abstract: Expandable polymers in particle form for the preparation of foams having high heat distortion resistance contain from 20 to 94.9% by weight of a styrene polymer, from 0.1 to 75% by weight of a polyphenylene ether and from 5 to 20% by weight of a blowing agent mixture of aliphatic or cycloaliphatic hydrocarbons on the one hand and aromatic hydrocarbons, alcohols, ketones, ethers, esters and/or chlorohydrocarbons on the other hand.