Cation exchange membrane of fluorinated polymer for an electrolysis
US4340680A · kind A · utility
31Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Jul 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A cation exchange membrane of a fluorinated polymer for an electrolysis comprises a structure of a copolymer of a fluorinated olefin and a fluorovinyl compound having the formula EQU CF.sub.2 .dbd.CX--(OCF.sub.2 CFY).sub.l (O).sub.m (CFY').sub.n COOM wherein X represents --F or --CF.sub.3 ; Y and Y' respectively represents --F or a C.sub.1 -C.sub.10 perfluoroalkyl group; l is 0 to 3; m is 0 or 1; n is 0 to 12 and M represents hydrogen atom or an alkali metal atom; and a modified surface layer of said cation exchange membrane in an anode side which has --SO.sub.3 M groups formed by converting --COOM groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.