Highly aromatic and liquid-crystalline co- polyimides endcapped with aromatic groups and crosslinked products therefrom
US11976231B2 · kind B2 · utility
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Key dates
| Filing date | Apr 12, 2023 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Apr 12, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/56
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A family of low-molecular-weight, main-chain thermotropic liquid-crystalline co-polyimides (TLC-CoPI) that are crosslinkable, and based on a unique, liquid-crystallinity (LC)-enabling diamine, namely, 1,3-bis[4-(4′-aminophenoxy)cumyl]benzene (BACB) and two or more mesogenic dianhydrides, at least one of which is a diphthalic dianhydride (DPA) that contains one or more thermally reactive and crosslinkable moieties similar to that of phenylethynyl (PE) is disclosed. Processes of making and using such low-molecular-weight, main-chain thermotropic liquid-crystalline co-polyimides are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.