Reverse-side treatment of fabric reinforced membranes
US4147844A · kind A · utility
24Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are a sulfonyl group containing fluorocarbon polymer cation-exchange membrane which has been fabric reinforced and, on one side of which has been treated, after the fabric reinforcing has been applied in a heat-pressure application, to a depth of at least 10 microns with a primary amine or a secondary amine or mixtures thereof to aminate a majority of said sulfonyl groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.