Abstract: The invention relates to expandable styrene polymers for elastic polystyrene foams, comprisinga) from 75 to 98% by weight of polystyrene and/or a styrene copolymer containing at least 50% by weight of copolymerized styrene,b) from 2 to 25% by weight of at least one styrene-soluble elastomer,c) from 1 to 15% by weight, based on the sum of a) and b), of a low-boiling blowing agent, and, if desired,d) conventional additives in effective amounts,where the unfoamed beads have a structure in which the elastomer phase is dispersed in the polystyrene phase in the form of cell particles, and to foams and foam moldings produced therefrom.

Abstract: The invention relates to expandable styrene polymers for elastic polystyrene foams, comprisinga) from 50 to 90% by weight of polystyrene and/or a styrene copolymer containing at least 50% by weight of copolymerized styrene,b) from 5 to 30% by weight of at least one styrene-soluble elastomer,c) from 5 to 20% by weight of at least one block copolymer containing styrene as one component,d) from 1 to 15% by weight, based on the sum of a), b) and c), of a low-boiling blowing agent, and, if desired,e) conventional additives in effective amounts,where, in the unfoamed polystyrene beads, component b) is in the form of cell particles and component c) is in the form of particles having a mean size of from 0.2 to 2 .mu.m in the polystyrene phase, and to foams and foam moldings produced therefrom.

Abstract: A thermoplastic molding material contains, based on the sum of A and B,A: from 75 to 97% by weight of a polystyrene A as a hard matrix andB: from 3 to 25% by weight of a particulate, elastomeric (co)polymer B based essentially on butadiene or its copolymers, in turn consisting of, based on B,B1: from 40 to 98% by weight of a (co)polymer B1 having a mean particle size of from 100 to 600 nm andB2: from 2 to 60% by weight of a particle blend B2 which in turn consists of, based on B2,B21: from 1 to 60% by weight of a (co)polymer B21 having a particle size of from 200 to 1,200 nm andB22: from 40 to 99% by weight of a (co)polymer B22 having a mean particle size of from 1,200 to 8,000 nm,(co)polymer B1 having an encapsulated-particle morphology and (co)polymers B21 and B22 having a cellular and/or coiled particle morphology.

Abstract: Multilayer, sealable plastics films essentially consist ofA: a top layer A of a polymer which is dimensionally stable at elevated temperatures and has a melting point above 200.degree. C.,B: an adhesion promoter B of from 30 to 95% by weight of a styrene/butadiene block copolymer, up to 95% by weight of polystyrene and/or high impact polystyrene and from 5 to 70% by weight of a polymer which is incompatible with polystyrene and contains polar groups, the percentages being based on B,C: a substrate layer C of from 5 to 100% by weight of a styrene/butadiene block copolymer and up to 95% by weight of polystyrene and/or high impact polystyrene,D: if required, a barrier layer D which may correspond to the top layer A andE: a sealing layer E whose composition essentially corresponds to that of the adhesion promoter B.

Abstract: Thermoplastic molding materials of improved green strength and impact toughness at low temperatures which are useful for producing injection moldings and are based on a TPU copolymer mixture, contain, based on 100 parts by weight,A) from 20 to 90 parts by weight of at least one thermoplastic polyurethane,B) from 1 to 40 parts by weight of at least one elastomeric graft copolymer formed fromB1) a grafting base comprising an elastomeric polymer having a glass transition temperature of below -20.degree. C. based on butadiene or an acrylate of from 1 to 10 carbon atoms in the alcohol moiety with or without a crosslinker andB2) a graft superstratum prepared by single- or multi-stage copolymerization of styrene, .alpha.-methylstyrene, acrylonitrile,methacrylonitrile and methyl methacrylate or of a mixture of at least two of said monomers,C) from 5 to 75 parts by weight of at least one copolymer prepared by copolymerization of, based on the total weight of (C),C1) from 55 to 90% by weight of .alpha.

Abstract: Molding materials comprising a matrix of high impact polystyrene and rubber incorporated in the form of discrete particles contain not less than 50% by weight of polystyrene A and an effective amount of up to 50% by weight of a graft rubber B. The graft rubber B consists of from 40 to 95% by weight of an elastomeric core b.sub.1 and from 5 to 60% by weight of a shell b.sub.2, i.e. from 5 to 50% by weight of a first shell B.sub.21 of styrene and from 50 to 95% by weight of a second shell b.sub.22 of from 60 to 90% by weight of styrene and from 10 to 40% by weight of acrylonitrile, A and B, b.sub.1 and b.sub.2, b.sub.21 and b.sub.22 and styrene and acrylonitrile each summing to 100% by weight.