Fluorosulfates of hexafluoroisobutylene and its higher...

Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing

Reexamination Certificate

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Reexamination Certificate

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11726449

ABSTRACT:
Hexafluoroisobutylene and its higher homologs are easily reacted with SO3to 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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