ALIPHATIC POLYESTER POLYETHER COPOLYMER, PROCESS FOR PRODUCING THE SAME AND ALIPHATIC POLYESTER COMPOSITION USING THE COPOLYMER

摘要

It is intended to provide a biodegradable aliphatic polyester polyether copolymer having a practically sufficient mechanical strength. An aliphatic polyester polyether copolymer having a polyester moiety, which comprises 35 to 50% by mol of an aliphatic diol unit, 35 to 50% by mol of an aliphatic dicarboxylic acid unit and 0 to 30% by mol of an aliphatic oxycarboxylic acid unit, and a polyether moiety, and having etasp/C of 1.40 or more and a weight ratio of the polyether moiety to the aliphatic polyester polyether copolymer of 0.1 to 90% by weight.