PREPARATION OF ESTERS OF POLY-(TETRAMETHYLENE ETHER) GLYCOL

摘要

E.I. du Pont de Nemours and Company(Heinsohn, G.E.; Robinson, I.M.; Pruckmayr, G. /A Gilbert, W.W.) Esters of poly(tetramethylene ether) glycol are prepared by polymerizing tetrahydrofuran in a reaction mixture which contains, in addition to the tetrahydrofuran, an acylium ion precursor such as acetic anhydride, a polymeric catalyst which contains sulfonic acid groups and optionally, a carboxylic acid such as acetic acid.