All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom
US12017972B2 · kind B2 · utility
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Key dates
| Filing date | Apr 12, 2023 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Apr 12, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1071
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A family of low-molecular-weight, main-chain thermotropic liquid-crystalline polyimides (TLC-PI) that are crosslinkable is disclosed. These all-aromatic TLC-PI are derived from (i) wholly aromatic and flexible diamine monomers, in which the linkage between the two aniline-ends contains a relatively high heat-tolerant but flexible chain constituted by two or more units of 1,4-phenoxy or 1,3-phenoxy or in combinations of both. Processes of making and using such all-aromatic TLC-PI is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.