Styrene copolymer composition

摘要

Disclosed is a styrene copolymer composition having: (I) a styrene/n-butyl acrylate copolymer having styrene monomer units and n-butyl acrylate monomer units in a ratio from 80/20 to 89/11, and (II) a block copolymer having a block configuration having (A) at least two polymer blocks each having mainly vinyl aromatic hydrocarbon monomer units and (B) at least one vinyl aromatic hydrocarbon/conjugated diene copolymer block, wherein the block copolymer (II) has vinyl aromatic hydrocarbon monomer units and conjugated diene monomer units in a ratio from 65/35 to 90/10 or from 75/25 to 85/15, and wherein the polymer blocks (A) in the block copolymer (II) have a maximum weight polymer block and a minimum weight polymer block, the weight ratio of the maximum weight polymer block to the minimum weight polymer block being in the range from 1.2 to 4.5 or from 1.0 to less than 1.2.