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US 6,642,319 B2Granted
Process for making graft copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorJosé Rodriguez-Parada
Life of this patent
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Abstract
The present invention is directed to a method for forming graft copolymers from perfluoroolefins and perfluorovinyl ethers having fluorosulfonyl and fluorosulfonate functionality with selected polymers, and the uncrosslinked graft copolymers resulting therefrom.
Claims8
A non-crosslinked polymer comprising a polymer having a backbone which comprises at least 50 mol-% methylene units, and a pendant group comprising a radical represented by the formula
- —CH2—CH2—CR5R6R7X
- wherein R5 and R6 are each independently fluorine or perfluoroalkyl, R7 is fluorinated alkylene optionally containing ether oxygen, and X is a radical represented by the formula
- —Y(M)(SO2R4)p
- wherein Y is C or N, M is hydrogen or an alkali metal, R4 is a perfluoroalkyl radical having 1-10 carbons optionally substituted by one or more ether oxygens, and p=1 or 2 with the proviso that p=1 when Y is N and p=2 when Y is C.
1 more element
Dependencies are inferred from the claim text.