Process for making ion exchange membranes and films
US5273694A · kind A · utility
7Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Ion exchange membranes or films are made from a solution of perfluorinated cycloalkanes, perfluorinated aromatic compounds and perfluorotrialkyl amines having a critical temperature greater than 150.degree. C. and certain carboxylic fluorinated polymers having an equivalent weight greater than 900. A process for repairing ion exchange membranes and films by spray coating the surface of the membrane or film with the solution is also disclosed. The ion exchange membranes and films are useful in chloralkali cells or fuel cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.