High transparency polymeric composition

摘要

High transparency polymeric composition essentially consisting of: (1) from 30 to 95% of polystyrene; (2) from 70% to 5% of a composition of vinylarene-conjugated diene block copolymers; the percentage sum of (1) and (2) being equal to 100; the composition (2) consisting of: (2a) from 30 to 60% by weight of copolymers with a linear structure (2b) from 70% to 40% by weight of copolymers with a branched structure; the weight average molecular weight of the above composition (2) ranging from 30,000 to 400,000, preferably from 50,000 to 200,000.