Gas permeable fluoropolymers and ionomers
US11905350B2 · kind B2 · utility
1Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2020 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Sep 9, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel copolymers that are fluoropolymers including a first repeat unit that is fluorinated and cyclic and a second repeat unit from a trifluorovinyl methylene ether monomer having sulfur or sulfone functionality in the pendant group are disclosed. The copolymers have relatively high gas permeability as a result of a cyclic repeat unit in the copolymer backbone and ionomers from oxidation of the sulfur containing functionality are particularity useful in the cathode structure of a proton exchange membrane fuel cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.