Glass-clear impact-modified polystyrene based on styrene-butadiene block copolymers

摘要

Block copolymers comprise at least two hard blocks S₁ and S₂ made from vinyl aromatic monomers and, between these, at least ore random soft block B/S made from vinyl aromatic monomers and from dienes, where the proportion of the hard blocks is above 40% by weight, based on the total block copolymer, wherein the 1,2-vinyl content in the soft block B/S is less than 20%.