US Patent 7276624 Fluorosulfates of hexafluoroisobutylene and its higher homologs

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Patent Inventor Names

Nina Ivanova Delyagina0

Paul R. Resnick0

Richard E. Fernandez0

Viacheslav A. Petrov0

Victor Filippovich Cherstkov0

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Patent abstract

Hexafluoroisobutylene and its higher homologs are easily reacted with SO3 to give fluorosulfates of the formula CH2═C(R)CF2OSO2F, wherein R is a linear, branched or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen. These compounds react under mild conditions with many nucleophiles to give CH2═C(R)CF2X, where X is derived from the nucleophile. This reaction provides a route to many substituted hexafluoroisobutylenes, which copolymerize easily with other fluoro- and hydrocarbon monomers such as vinylidene fluoride and ethylene.

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https://pdfpiw.uspto.gov/.piw?Docid=072766240

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