Process for preparation of copolymers from polyesters and aliphatic polyformals

摘要

Disclosed is a process for preparation of copolymers which have an inherent viscosity of at least 0.4 and are formed from polyesters and aliphatic polyformals. The process comprises contacting within a temperature range of 220 DEG to 280 DEG C. a poly(tetramethylene terephthalate) type polyester and selected aliphatic polyformals.