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