| 摘要 |
PURPOSE:To obtain a resin compsn. which gives moldings having excellent transparency, impact resistance, rigidity and dispersibility and reduced flow marks, by blending a specified block copolymer mainly composed of an arom. vinyl hydrocarbon and a conjugated diene with a styrene resin. CONSTITUTION:A block copolymer resin compsn. is obtd. by blending 5-98wt% block copolymer (a) represented by A-B-A or A-B-A-B-A with 95-5wt% styrene resin (b). In the formula, A is a polymer block mainly composed of an arom. vinyl hydrocarbon and B is a polymer block mainly composed of a conjugated diene. In a block copolymer composed of an arom. vinyl hydrocarbon and a conjugated diene in a weight ratio of 60/40-95/5, the ratio of the weight-average MW to the number-average MW of the arom. vinyl hydrocarbon polymer block in the block polymer is 1.2-2.0. The compsn. can be extruded into a sheet, a film, etc., either as such or after being colored. |
