Abstract:
Disclosed is a thermoplastic polyester elastomer, which is formed by reacting 100 parts by weight of ester and 0.01 to 2 parts by weight of an epoxy resin with two epoxy groups, wherein the ester is formed by reacting a parts by mole of a hard-segment diol, b parts by mole of a soft-segment diol, and 1 part by mole of a diacid, wherein 1≦a≦3 and 0.005≦b≦1.5.