摘要:
A thermoplastic moulding composition with improved metal plating properties is provided. This thermoplastic moulding composition is produced from a graft copolymer (A) a thermoplastic polymer (B) and a thermoplastic polymer (C) that is not, or only to a limited amount miscible with the thermoplastic polymer (B). The thermoplastic polymer (C) contains from 1.2 to 3% by weight of at least one monoethylenically unsaturated monomer, like acrylic acid, methacrylic acid, or dicarboxylic acids, such as maleic acid and fumaric acid and their anhydrides, such as maleic anhydride. The vinyl aromatic content of component (C) is at least 5 units lower compared to that of component (B).The graft copolymer is produced from a soft elastomeric particulate graft base with a glass transition temperature below 0° C. obtained by emulsion polymerization of a conjugated diene alone or with a small amount of a monoethylenically unsaturated monomer or of at least one C1-8-alkyl acrylate, or of mixtures of these, upon which is grafted a vinyl aromatic monomer and acrylonitrile and optionally another monoethylenically unsaturated monomer.
摘要:
The present invention relates to a molding composition comprising (A) from 30 to 85% by weight of a copolymer containing at least one α,β-unsaturated monocarbonitrile in amounts of at least 30% by weight, and at least one aromatic vinyl monomer, as component (A), (B) from 10 to 40% by weight of a graft rubber with an average particle size of from 100 to 280 nm, comprising a graft base b1, composed of at least one α,β-unsaturated monocarboxylic ester, and at least one graft shell b2, composed of at least one aromatic vinyl monomer and of at least one α,β-unsaturated monocarbonitrile, as component (B), (C) from 5 to 30% by weight of a graft rubber with an average particle size of from 410 to 1000 nm, comprising a graft base c1, composed of at least one α,β-unsaturated monocarboxylic ester, and at least one graft shell c2, composed of at least one aromatic vinyl polymer and of at least one α,β-unsaturated monocarbonitrile, as component (C), and 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, and in component (C), in % by weight based on the total weight of the graft shell c2, 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). The invention also relates to the process of producing the molding composition and its use.