Patent ID: 6683133
Filing Date: 2004-01-27
Classification: B29C,C08L

Abstract:
A thermoplastic molding composition which when molded produces articles having matte surfaces and are free from flow lines comprisingA) from 20 to 90% by weight of a thermoplastic polymer composed of units derived from a1) from 60 to 85% by weight of styrene and/or substituted styrene, a2) from 15 to 40% by weight of acrylonitrile, and a3) from 0 to 25% by weight of other monomers copolymerizable with a1 and a2, and B) from 10 to 80% by weight of a crosslinked graft rubber having two or more phases and comprising b1) from 30 to 90% by weight of a phase prepared by emulsion polymerization of b1.1) from 80 to 100% by weight of an acrylate, and b1.2) from 0 to 20% by weight of other monomers, and b2) from 10 to 70% by weight of at least one other phase prepared by polymerizing b2.1) from 60 to 85% by weight of styrene, b2.2) from 15 to 35% by weight of acrylonitrile and b2.3) from 0 to 20% by weight of other monomers, in the presence of the first phase, wherein the polymer A has a viscosity number, measured on a 0.5% strength solution in dimethylformamide at 23Â° C., of from 50 to 70 ml/g and at least 80% by number of the rubber particles B in the dispersion, after the preparation thereof, have a diameter of <0.2 &mgr;m.