Patent Number: 7,786,251

Title: Process for producing polyester ether poly- or mono-ol

Abstract: To provide a process for producing a polyester ether poly- or mono-ol having a narrow molecular weight distribution, which is obtained by copolymerizing an initiator having hydroxyl groups with a cyclic ester compound and an alkylene oxide. It is possible to produce a polyester ether poly- or mono-ol having a molecular distribution (Mw/Mn) of from 1.02 to 1.4 by copolymerizing a cyclic ester compound which carbon number is from 3 to 9 and an alkylene oxide which carbon number is from 2 to 20 with an initiator having from 1 to 12 hydroxyl groups and having a number average molecular weight (Mn) of from 18 to 20,000 in the presence of a double-metal cyanide complex catalyst is having tert-butyl alcohol as at least a part of an organic ligand.

Inventors: Uemori; Shigeki (Kamisu, JP), Ikai; Shigeru (Kamisu, JP), Suzuki; Chitoshi (Kamisu, JP)

Assignee: Asahi Glass Company, Limited

International Classification: C08G 63/82 (20060101)

Expiration Date: 8/31/12018