Fluorosulfates of hexafluoroisobutylene and its higher homologs and their derivatives
US7301059B2 · kind B2 · utility
1Cited by
5References
10Claims
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Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Mar 22, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F214/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.