Process for the polymerization of cyclic ether

Details Process for the polymerization of cyclic ether Process for the polymerization of cyclic ether

1997-06-02

1999-05-25

Krass, Frederick

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560198, 560240, 560252, 568617, 528408, 528409, 528417, C07C 6724

Patent

active

059070544

ABSTRACT:
The present invention provides a process for the production of an ester of polyoxyalkylene glycol on an industrially favorable basis which comprises the ring opening polymerization of a cyclic ether in the presence of a carboxylic anhydride and a solid acid polymerization catalyst to obtain a polymer esterified at some or all of the ends thereof, wherein the water content in the reaction system is maintained at not more than 30 ppm by weight during the polymerization reaction.

REFERENCES:
patent: 3935252 (1976-01-01), Tomomatsu
patent: 4189566 (1980-02-01), Mueller et al.
patent: 4803299 (1989-02-01), Mueller

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