Patent ID: 6767964
Filing Date: 2004-07-27
Classification: C08F,C08L

Abstract:
Polymer compositions containingI) at least one graft rubber polymer obtained by emulsion polymerisation of styrene and acrylonitrile in a weight ratio of 95:5 to 50:50, styrene and/or acrylonitrile being able to be partially or completely replaced by &agr;-methylstyrene, methyl methacrylate or N-phenylmalideimide or mixtures thereof, in the presence of a butadiene polymer latex (A) with a mean particle diameter d50 of 80 to 220 nm, II) at least one graft rubber polymer obtained by emulsion polymerisation of styrene and acrylonitrile in a weight ratio of 95:5 to 50:50, styrene and/or acrylonitrile being able to be completely or partially replaced by &agr;-methylstyrene, methyl methacrylate or N-phenylmaleimide or mixtures thereof, in the presence of a butadiene polymer latex (B) with a mean particle diameter d50 of 340 to 480 nm, III) at least one rubber-free copolymer of styrene and acrylonitrile in a weight ratio of 95:5 to 50:50, styrene and/or acrylonitrile being able to be completely or partially replaced by &agr;-methylstyrene, methyl methacrylate or N-phenylmaleimide or mixtures thereof, characterised in that the butadiene polymer latex (A) is obtained by seed polymerisation using a seed latex with a mean particle diameter of 10 to 100 nm, and the butadiene polymer latex (B) is obtained by seed polymerisation using the butadiene polymer latex (A) as seed latex.