Alkyl perfluoro-.omega.-fluoroformyl esters and monomers therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorDavid C. England
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Abstract
Alkyl perfluoro-.omega.-fluoroformyl esters are provided which have the formula ##STR1## wherein R is alkyl of 1-6 carbon atoms, and N IS 0-6 (PREFERABLY 0). Compounds where n is 0 are prepared by contacting SO.sub.3 with a compound of the formula ROOC--CF.sub.2 --CF.sub.2 --OR.sup.1. Compounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide. Also provided are polymerizable monomers having the formula ##STR2## wherein Y is --COOR, --COOH, --COOM or --CN, where M is an alkali metal, ammonium or quaternary ammonium and p is 1-5, prepared from alkyl perfluoro-.omega.-fluoroformyl esters of this invention.
Claims9
A compound of the formula ##STR39## wherein Y is --COOR, --COOH, --COOM or --CN, R is an alkyl group of from 1 to 6 carbon atoms, M is an alkali metal, ammonium or quaternary ammonium, and p is 1 to 5.
Dependencies are inferred from the claim text.