Patent ID: 8084538

Claim:
A thermoplastic polymer composition comprising (A) 50 to 95% by mass of an aliphatic polyester-based resin which is an aliphatic polyester (A1) mainly obtained from 1,4-butanediol and succinic acid, (B) 5 to 50% by mass of a block copolymer comprising (B 1) a hard segment block comprising at least one polymer selected from the group consisting of a polyamide, a polyester, a polyolefin and a polyurethane, and (B2) a soft segment block having an ether bond, and at least one polymer (C) selected from the group consisting of: (C1) a polyester-based resin (except for the components (A) and (B)), (C2) a polyamide-based resin (except for the component (B)), (C3) an acrylic polymer, (C4) a polycarbonate-based resin, (C5) a polyacetal-based resin, (C6) a polyphenylene ether-based resin, (C7) a polyolefin-based resin (except for the component (B)) and (C8) a styrene-based resin, with the proviso that a total amount of the components (A) and (B) is 100% by mass wherein the content of the at least one polymer in the composition is 5 to 260 parts by mass on the basis of 100 parts by mass of the total amount of the aliphatic polyester-based resin (A) and the block copolymer (B).