Poly(aryl ether) with pendent sulfonic acid phenyl groups
US7947800B2 · kind B2 · utility
2Cited by
2References
12Claims
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Key dates
| Filing date | Jul 13, 2007 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Dec 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sulfonated poly(aryl ether) (SPAE) having a poly(aryl ether) (PAE) main chain and a sulfonated phenyl group pendent from the main chain are useful in proton exchange membranes (PEMs), particularly for fuel cells. The pendent phenyl group can provide an easily sulfonable site that may be sulfonated under mild conditions, providing the ability to precisely control the sulfonic acid content of the SPAE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.