Polymeric materials
US8187767B2 · kind B2 · utility
1Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2004 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Nov 17, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A polymer electrolyte membrane or gas diffusion electrode includes an ion-conducting polymeric material which includes moieties of formula (A) which are substituted on average with more than 1 and 3 or fewer groups (e.g. sulphonate groups) which provide ion-exchange sites and hydrogen atoms of said moieties are optionally substituted, wherein each X in said moieties of formula A independently represent an oxygen or sulphur atom. The ion conducting polymeric material is suitably prepared by controllably sulphonating a polymeric material using about 100% sulphuric acid at 34° C. to 36° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.