Solvent systems for synthesis of poly(amic acid) and polyimide polymers
US10982047B2 · kind B2 · utility
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Key dates
| Filing date | Sep 28, 2016 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Oct 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1071
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of: (A) a first component consisting essentially of at least one of a sulfoxide, e.g., DMSO, and an alkyl phosphate, e.g., triethyl phosphate, and (B) optionally, a second component consisting essentially of at least one aprotic glycol ether, e.g., dipropylene glycol dimethyl ether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.