Hydrogen-containing flourosurfacant and its use in polymerization
US5763552A · kind A · utility
77Cited by
8References
13Claims
0Family size
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Key dates
| Filing date | Jul 1, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jul 1, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C53/21
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A partially-fluorinated surfactant having internal methylene groups and having the formula R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM wherein m is 1-3, R.sub.f is perfluoroalkyl or perfluoroalkoxy, containing 3-8 carbon atoms, R'.sub.f is linear or branched perfluoroalkylene containing 1-4 carbon atoms, and M is NH.sub.4, Li, Na, K, or H is useful in polymerization of fluorinated monomers. High molecular weight can be achieved in homopolymerization of tetrafluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.