Impact-resistant thermoplastic molding material

Claim 1

An impact-resistant thermoplastic molding material which essentially contains A. polystyrene as the matrix and B. uniformly dispersed therein, two elastomeric polymers or copolymers (b 1 ) and (b 2 ), predominantly composed of 1,3-dienes, in an amount of from 3 to 30% by weight, calculated as polybutadiene and based on the matrix, the polymers or copolymers being present as particles of different mean size (different d 50 of the cumulative mass distribution), namely (b 1 ) as particles of 0.2-0.6 μm, in a proportion of 60-95% by weight, based on polybutadiene, and (b 2 ) as particles of 2-8 μm, in a proportion of 40-5% by weight, based on polybutadiene, with or without C. conventional additives, in effective amounts, in which final molding material the polymer or copolymer (b 1 ) has a capsule particle morphology and the polymer or copolymer (b 2 ) has a cell particle morphology, a coil particle morphology or a cell and coil particle morphology.