Flame-retardant thermoplastic polyester elastomer resin composition and molded article obtained therefrom

Provided is a flame-retardant thermoplastic polyester elastomer resin composition which, in particular, is capable of producing a hollow and elongated molded article having excellent extrusion moldability with a uniform thickness and high precision. A thermoplastic polyester elastomer composition containing 50-94 mass% of a thermoplastic polyester elastomer obtained by bonding a hard segment comprising a polyester comprising an aromatic dicarboxylic acid and an aliphatic or alicyclic diol, and a soft segment comprising mainly an aliphatic polycarbonate, at least a part of terminal groups of the thermoplastic polyester elastomer are terminated by polycarbodiimide; and 1-45 mass% of a flame retardant, the melt flow rate value of the resin composition being 2-15 g/10 minutes, and the difference between the MFR value 35 minutes after the resin composition is added and the MFR value 5 minutes after the resin composition is added being 0-20 g/10 minutes. 本发明提供一种阻燃性热塑性聚酯弹性体树脂组合物，特别地，其可以以均匀的厚度、高精度地生产挤出成型性优异、中空且长条的成型品