Water co-catalyst for polyimide processes
US11932745B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | May 11, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure is directed to methods of forming polyimide gels. The methods generally include forming a polyamic acid and dehydrating the polyamic acid with a dehydrating agent in the presence of water. The resulting polyimide gels may be converted to polyimide or carbon xerogels or aerogels. The methods are advantageous in providing rapid or even instantaneous gelation, which may be particularly useful in formation of beads comprising the polyimide gels. Polyimide or carbon gel materials prepared according to the disclosed method are suitable for use in environments containing electrochemical reactions, for example as an electrode material within a lithium-ion battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.