Stable poly(imidazolium) hydroxides
US11299464B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jul 29, 2017 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0616
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided herein are imidazolium polymers having steric hindrance at the 4-position of the imidazole moieties in the polymeric chain. The sterically-protected, N-methylated imidazolium polymers exhibit hydroxide stability in concentrated caustic solutions at elevated temperatures, such as at 100° C. and higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.