Patent ID: 6767962
Filing Date: 2004-07-27
Classification: C08F,C08L

Abstract:
A thermoplastic molding composition comprisingI) a graft rubber polymer produced by emulsion polymerization of a first mixture containing styrene and acrylonitrile in a weight ratio of 95:5 to 50:50 therebetween, in the presence of butadiene polymer latex (A) having a median particle diameter (d50) of 80 to 220 nm, determined by ultracentrifuge measurement, II) a graft rubber polymer produced by emulsion polymerization of a second mixture containing styrene and acrylonitrile in a weight ratio of 95:5 to 50:50 therebetween in the presence of butadiene polymer latex (B) having a median particle diameter (d50) of 350 to 650 nm, determined by ultracentrifuge measurement, III) a rubber-free copolymer polymerized of a third mixture that contains styrene and acrylonitrile in a weight ratio of from 95:5 to 50:50 therebetween, wherein butadiene polymer latex (A) is the product of seed polymerization in which seed is butadiene polymer latex having a median particle diameter of 10 to 100 nm, determined by ultracentrifuge measurement, and the butadiene polymer latex (B) is the product of agglomeration in which butadiene polymer latex (A) is the starting latex.