Copolymers of tetrafluoroethylene and perfluorinated sulfonyl monomers and membranes made therefrom
US5463005A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Aug 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel perfluorinated sulfonyl monomers and polymers and membranes made therefrom are provided. The fluorocarbon monomers have the general formula: ##STR1## wherein X is CH or N, I is H, K, Na, or a Group I or II metal, R.sub.f is one or more fluorocarbon group, including fluorocarbon ethers and/or sulfonyl groups and/or perfluoro-non-oxy acid groups, R.sub.f, is C.sub.n F.sub.2n+1 (n=0,1,2, . . .), Y is C.sub.n F.sub.2n+1 (n=0,1,2, . . .) and m is 0 or 1. The monomers are made from the non-oxy superacid groups ##STR2## Copolymers of the above monomers with other monomeric material such as tetrafluoroethylene are also provided. These copolymers may then be cast into ionomer membranes and other structures for use in electrochemical processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.