Preparation of oxetane polyether polyols using a bleaching earth

Details Preparation of oxetane polyether polyols using a bleaching earth Preparation of oxetane polyether polyols using a bleaching earth

1989-02-27

1990-11-13

Kight, III, John

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

Synthetic resins

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

528417, 568613, 568617, 568624, 568625, 560240, 560263, 560264, C08G 6510, C08G 6512, C08G 6518

Patent

active

049702955

ABSTRACT:
A process for the preparation of polyethers is disclosed in which an oxetane monomer, or a mixture of an oxetane monomer and an oxolane monomer, and a carboxylic acid anhydride are contacted with a bleaching earth catalyst. The process yields ester-terminated polyethers which may be saponified to obtain hydroxy-terminated polyether polyols.

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patent: 4672141 (1987-06-01), Motoi et al.
patent: 4728722 (1988-03-01), Mueller
patent: 4803299 (1989-02-01), Mueller

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