Method for preparing hydroxy group end-capped polyether glycols

Details Method for preparing hydroxy group end-capped polyether glycols Method for preparing hydroxy group end-capped polyether glycols

1995-06-27

1996-12-17

Short, Patricia A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

568617, 568621, 568623, 568624, 528421, C08G 6532

Patent

active

055854583

ABSTRACT:
A method for preparing polyether glycol is disclosed. An ester end-capped polyalkylene ether and an alcohol are subjected to alcoholysis at a temperature of 35.degree.-150.degree. C. and a pressure of 1-10 atm in the presence of a mixed metal oxide as a catalyst. The mixed metal oxide includes an alkaline earth metal oxide and at least one component selected from alumina, silica, and zinc oxide.

REFERENCES:
patent: 2691038 (1959-10-01), Engelhardt
patent: 4153786 (1979-05-01), Pruckmayr
patent: 4163115 (1979-07-01), Heinsohn
patent: 4230892 (1980-10-01), Pruckmayr
patent: 4584414 (1986-04-01), Pruckmayr
patent: 5344964 (1994-09-01), Chu

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