Styrene copolymers, polystyrene compositions, processes for the production of styrene copolymers and injection-moulded articles

摘要

A styrene copolymer is described which has a weight-average molecular weight of approximately 200,000 to 2,000,000, which has 1 to 20 branching points in the average molecular weight Z and which has a content of substances which are insoluble in a mixture of methyl ethyl ketone and of methanol not exceeding 5 % by weight and a content of substances which are soluble in methanol not exceeding 5 % by weight; processes for preparing the styrene copolymer; a polystyrene resin composition containing the styrene copolymer; and moulded articles such as injection mouldings from the polystyrene resin composition.