Patent ID: 7786251
Filing Date: 2010-08-31
Classification: C08G

Abstract:
1. A process for producing a polyester ether polyol and/or a polyester ether monool having a molecular weight distribution (Mw/Mn) of from 1.02 to 1.4, comprising copolymerizing at least one cyclic ester compound which carbon number is from 3 to 9, and at least one alkylene oxide which carbon number is from 2 to 20 with at least one initiator having from 1 to 12 hydroxyl groups and having a number average molecular weight (Mn) of from 18 to 20,000 at a reaction temperature of from 115 to 180° C. in the presence of a double-metal cyanide complex catalyst having tert-butyl alcohol as at least a part of an organic ligand.