Free radical polymerization method for fluorinated copolymers
OwnerPaul Gregory Bekiarian, William Brown Farnhaminventors
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Abstract
This invention concerns a process for production of copolymers, especially functionalized, or, at least partially fluorinated copolymers by means of a polymerization process comprising: co-polymerizing, in aqueous emulsion, one or more monomers selected from the group consisting of tetrafluoroethylene, trifluoroethylene, vinylidene fluoride, vinyl fluoride, ethylene, chorotrifluoroethylene, hexafluoropropylene, perfluoromethyl vinyl ether, and perfluoroethyl vinyl ether with a fluorinated co-monomer having limited water solubility, said comonomer being dispersed in the form of droplets of certain sizes.
Claims5
A process for forming a copolymer comprising,
- co-polymerizing, in aqueous emulsion vinylidene fluoride, with a functionalized fluorinated comonomer comprising sulfonyl fluoride or carboxylic acid ester groups, said comonomer being substantially insoluble in water and being dispersed in the form of droplets of a size of 0.5 microns or less, said polymerization process being conducted in the presence of a fluorinated surfactant and a free-radical initiator.
Dependencies are inferred from the claim text.