Graft polymeric membranes and ion-exchange membranes formed therefrom
US6723758B2 · kind B2 · utility
82Cited by
22References
10Claims
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Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Aug 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Graft polymeric membranes and methods for making graft polymeric membranes have one or more trifluorovinyl aromatic monomers that are radiation graft polymerized to a polymeric base film. The membranes comprise a polymeric base film to which has been graft polymerized substituted &agr;,&agr;,&bgr;-trifluorostyrene and/or &agr;,&agr;,&bgr;-trifluorovinylnaphthylene monomers, which are activated towards graft polymerization. As ion-exchange membranes, the membranes are suitable for use in electrode apparatus, including membrane electrode assemblies in, for example, fuel cells. The membranes can also be crosslinked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.