Organic compounds -- part of the class 532-570 series – Organic compounds – Sulfonic acids or salts thereof
Reexamination Certificate
2007-10-02
2007-10-02
Barts, Samuel (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Sulfonic acids or salts thereof
Reexamination Certificate
active
10435003
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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Cherstkov Victor Filippovich
Delyagina Nina Ivanova
Fernandez Richard E.
Petrov Viacheslav A.
Resnick Paul R.
Barts Samuel
E. I. du Pont de Nemours and Company
Gale Kellette
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