Patent ID: 8129030

Claim:
A polymer composition comprising 33 to 67% by mass of a polybutylene terephthalate-based resin (A) and 67 to 33% by mass of an acrylic block copolymer (B), wherein the polybutylene terephthalate-based resin (A) has a melt flow rate of 10 to 40 g/10 min at 250° C. and a 2.16 Kg load; and in the acrylic block copolymer (B), the weight-average molecular weight is 50000 to 100000, the block structure is a triblock structure in which two polymer blocks (b2) comprising a methacrylic ester unit are bonded to the both ends of a polymer block (b1) comprising an acrylic ester unit, the total mass of the polymer block (b2) is 20 to 35% by mass with respect to the acrylic block copolymer (B), the order-disorder transition temperature of the block copolymer (B) is 180 to 230° C., and the polybutylene terephthalate-based resin (A) is dispersed in the block copolymer (B).