Being transparent is based on the styrene - butadiene block copolymer blend, being tough, the formation composition which has rigidity

摘要

a) 65 - 95 mass % vinyl aromatic monomer and 35 - 5 mass % it consists of diene and copolymer block of 1 kinds or more where Tg _A is 40 - the 90 (B/S) copolymer or block copolymer A and b which include _A) at least high solid block S of 1 where it consists of vinyl aromatic monomer kinds and 20 - 60 mass % vinyl aromatic monomer and 80 - 40 mass % it consists of diene and copolymer block of 1 kinds or more where Tg _B is the 70 - the 0 (B/S) the block copolymer B which includes with _B, c) polystyrene C, and d) 65 - 95Mass % vinyl aromatic image monomer and 35 - 5 mass % it consists of diene and at least copolymer block of 1 where Tg _A is 40 - the 90 kinds (B/S) _A and 1 - 60 mass % vinyl aromatic monomer and 99 - 40 mass % it consists of diene and at least diene block B of 1 where Tg _B is the 100 - the 0 kinds or copolymer block (B/S) block copolymer D and e which include with _B) the blend which includes plasticizer E. Selective figure It is not