Patent ID: 8440764

Claim:
A molding composition comprising (A) from 50 to 70% by weight of a copolymer comprising, as main units, at least one α,β-unsaturated monocarbonitrile in amounts of at least 30% by weight, based on the total weight of component (A), and at least one aromatic vinyl monomer, as component (A), (B) from 20 to 30% by weight of a graft rubber with an average particle size of from 100 to 280 nm, comprising a graft base b 1 , composed of at least one α,β-unsaturated monocarboxylic ester, and at least one graft shell b 2 , composed of at least one aromatic vinyl monomer and of at least one α,β-unsaturated monocarbonitrile, as component (B), (C) from 10 to 20% by weight of a graft rubber with an average particle size of from 410 to 1000 nm, comprising a graft base c 1 , composed of at least one α,β-unsaturated monocarboxylic ester, and at least one graft shell c 2 , composed of at least one aromatic vinyl polymer and of at least one α,β-unsaturated monocarbonitrile, as component (C), and (D) from 0 to 10% by weight of additives, as component (D), where the entirety of the amounts of components (A), (B), (C), and (D) is 100% by weight, wherein the ratio by weight of component (B) to component (C) is in the range from 3:1 to 1:1, and the content of the α,β-unsaturated monocarbonitrile in component (B), in % by weight based on the total weight of the graft shell b 2 , and in component (C), in % by weight based on the total weight of the graft shell c 2 , is in each case from 5 to 10 percentage points below the content of α,β-unsaturated monocarbonitrile in component (A), in % by weight based on the total weight of component (A).