.alpha.,.beta.,.beta.-trifluorostyrene-based composite membranes
US6258861A · kind A · utility
6Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha., .beta., .beta.-trifluorostyrene, substituted .alpha., .beta., .beta.-trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.