Process for preparing polyester elastomers

摘要

A process for preparing polyester elastomers from a dicarboxylic acid, mainly an aromatic dicarboxylic acid, or an ester-forming derivative thereof, a low molecular weight glycol, mainly 1,4-butanediol, and a polyoxyalkylene glycol is provided. This process is characterized in that at least 10 wt. % of the polyoxyalkylene glycol comprises a poly(oxy-2-methyl-3,3-propylene)diol. The obtained polyester elastomers have excellent low-temperature properties and elastic recovery.