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US 4,906,714 AGranted
Partially fluorinated polyesters from ketene acetals and fluorinated vinyl monomers
AssigneeE. I. Du Pont de Nemours and Company
InventorHarry N. Cripps
Life of this patent
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Abstract
Partially fluorinated polyesters are disclosed having increased biodegradability and water repellancy. The incorporation of an ester group into the backbone of the partially fluorinated compound permits modification of the compound's physical properties.
Claims11
A partially fluorinated polyester of the formula ##STR14## wherein the polyester consists essentially of the polymeric reaction product of a fluorinated olefin and a cyclic ketene acetal monomer wherein
- X=F, CF.sub.3, Cl, Br, I, OCF.sub.3, OCF.sub.2 CF.sub.3, OCF.sub.2 CF.sub.2 CF.sub.3 or OCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.2 CF.sub.3 ;
- R=--(CHR.sup.1 (CH.sub.2).sub.n CHR.sup.2)-- (where n=0-2 or ##STR15## ;
- R.sup.1 and R.sup.2 are independently H, C.sub.1 -C.sub.4 alkyl or phenyl.
Dependencies are inferred from the claim text.