Method for producing—SO3H group-containing fluoropolymer and—SO3H group-containing fluoropolymer
US8034880B2 · kind B2 · utility
3Cited by
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14Claims
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Key dates
| Filing date | Jul 6, 2010 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Jul 6, 2030 |
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.