Method for producing -SO3H group-containing fluoropolymer and -SO3H group-containing fluoropolymer
US7776970B2 · kind B2 · utility
2Cited by
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20Claims
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Key dates
| Filing date | Feb 5, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a novel production process by which unstable terminal groups can be sufficiently stabilized under mild conditions. The present invention is related to a method for producing an —SO3H group-containing fluoropolymer wherein a fluoropolymer to be treated having a —SO2X group-containing monomer unit (X representing F or Cl) is subjected to a procedure comprising at least the steps A, B and C defined below in that order:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.