TRANSPARENT, CRASHPROOF POLYSTYRENE BASED ON BUTADIENE-STYRENE BLOCK COPOLYMERS AND A METHOD FOR PRODUCING THEREOF

摘要

The invention relates to block copolymers comprising at least two hard blocks S1 and S2 consisting of vinyl aromatic monomers and at least one random soft block B/S which is positioned between the hard blocks and consists of vinyl aromatic monomers and dienes. The proportion of hard blocks is more than 40 % by weight of the total block copolymer.