Manufacture of 3,3,4,4-tetrahydroperfluoroalkanoates
US6376705B1 · kind B1 · utility
8Cited by
1References
13Claims
0Family size
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Inventor
Key dates
| Filing date | May 22, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | May 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/343
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Esters and other carboxylic acid derivatives of 3,3,4,4-tetrahydroperfluoroalkylcarboxylic acids are made by the iron promoted reaction of an ester of bromodifluoroacetic acid or other carboxylic acid derivatives and a (perfluoroalkyl)ethylene. The resulting products may be converted to the corresponding alkali metal or ammonium carboxylate slits which are useful as surfactants in fluoroolefin polymerizations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.