Patent ID: 6867258
Filing Date: 2005-03-15
Classification: C08L

Abstract:
1. A high transparency composition consisting essentially of (1) from 30% to 95% of polystyrene homopolymer; (2) from 70% to 5% of a composition of one or more vinylarene-conjugated diene block copolymers; the percentage sum of (1) and (2) being equal to 100; wherein composition (2) consists essentially of wherein: 1) A is a polyvinylarene block; 2) b is a monomeric unit of conjugated diene; 3) T is a vinylarene conjugated diene random copolymer; 4) x is the number of monomer units which form a polydiene block B; 5) B is the polydiene block; 6) n and m are the number of branches of the copolymer, n+m is from 1 to 5; 7) B-T-A is the partially block copolymer grafted on the polydiene function -(-b-) the weight average molecular weight of the above composition (2) is from 30,000 to 400,000, and the conjugated diene blocks are unsaturated, wherein a 2.0 mm thick sample of the high transparency composition has a transparency of 80-89%.