Aqueous polymerization of fluorinated monomer using polymerization agent comprising fluoropolyether acid or salt and short chain fluorosurfactant

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United States of America Patent

PATENT NO 11440981
APP PUB NO 20130331516A1
SERIAL NO

13965317

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Abstract

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A process comprising polymerizing at least one fluorinated monomer in an aqueous medium containing initiator and polymerization agent to form an aqueous dispersion of particles of fluoropolymer, the polymerization agent comprising:

    fluoropolyether acid or salt thereof having a number average molecular weight of at least about 800 g/mol; andfluorosurfactant having the formula:[R1—On-L-A−]Y+wherein: R1 is a linear or branched partially or fully fluorinated aliphatic group which may contain ether linkages;n is 0 or 1;L is a linear or branched alkylene group which may be nonfluorinated, partially fluorinated or fully fluorinated and which may contain ether linkages;A− is an anionic group selected from the group consisting of carboxylate, sulfonate, sulfonamide anion, and phosphonate; andY+ is hydrogen, ammonium or alkali metal cation;with the proviso that the chain length of R1—On-L- is not greater than 6 atoms.

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Patent Owner(s)

Patent OwnerAddress
THE CHEMOURS COMPANY FC LLC1007 MARKET STREET WILMINGTON DE 19801

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brothers, Paul Douglas Chadds Ford, US 63 533
Gangal, Subhash Vishnu Hockessin, US 40 167

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