Process for impregnating supports
US6939581B2 · kind B2 · utility
3Cited by
18References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2002 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Aug 9, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An impregnation process of a porous support including immersing the support in an aqueous colloidal dispersion of ionomeric (per)fluorinated polymer, containing suiphonyl fluoride groups and having a concentration greater than 15% by weight, thermal treatment at 200° C. or less, conversion of the ionomer sulphonyl groups into the corresponding salts, ionomer crosslinking when ionomer equivalent weight is less than 650 g/eq.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.