Preparation of vinyl ether terminated polyesters
AssigneeAllied-Signal Inc.
InventorsGeorge D. Green, James R. Snyder, Darryl K. Barnes
Life of this patent
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Abstract
Vinyl ether terminated ester oligomers having a range of molecular weights are prepared by reacting a vinyl ether terminated polybasic ester with a polyol in the presence of a catalyst. Continual removal of a hydroxy monovinyl ether avoids formation compounds containing acetal moieties. Alternatively, a polybasic ester is chain extended with a polyol with continual removal of the alcohol by-product. Then, the terminal ester moieties are end capped with a monohydroxy vinyl ether. The oligomers have application in coatings and the like.
Claims17
A method of preparing vinyl ether terminated polyesters comprising the steps of:
- (a) reacting a polyol with a vinyl ether terminated polybasic ester in the presence of a transesterification catalyst to produce a vinyl ether terminated oligomer of said polyol and polybasic ester and as a by-product a hydroxy monovinyl ether, and
- (b) continuously separating said by product hydroxy monovinyl ether during the reaction of (a).
A method of preparing vinyl ether terminated polyesters comprising the steps of:
- (a) reacting a polyol with a polybasic ester in the presence of a transesterification catalyst to produce a chain-extended oligomer of said polyol and poly basic ester and as a by-product an alcohol, continuously separating said alcohol during said reaction, and
- (b) capping the chain-extended oligomer of (a) by reaction with a hydroxy mono vinyl ether or vinyl ether terminated ester.
Dependencies are inferred from the claim text.