PROCESS FOR THE PRODUCTION OF POLYESTER ETHER POLY- OR MONO-OLS

摘要

A process for the production of polyester ether poly-or mono-ols having narrow molecular weight distributions by copolymerizing a starter having a hydroxyl group with a cyclic ester and an alkylene oxide. Polyester ether poly-or mono-ols having molecular weight distributions (Mw/Mn) of 1.02 to 1.4 can be produced by copolymerizing a starter having 1 to 12 hydroxyl groups and a number-average molecular weight (Mn) of 18 to 20000 with a cyclic ester having 3 to 9 carbon atoms and an alkylene oxide having 2 to 20 carbon atoms in the presence of a double-metal cyanide complex catalyst containing tert-butyl alcohol as at least part of the organic ligand.