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US 12,662,575 B2Granted
Highly aromatic and liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsLoon-Seng Tan, Zhenning Yu, Bingqian Zheng, Hilmar Koerner
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Abstract
Applicants disclose a family of low-molecular-weight, main-chain thermotropic liquid-crystalline polyimides (TLC-PI) that are thermally crosslinkable and processes of making and using same. Such materials provide flexibility advantage when modifying ink materials to meet varying processing conditions in additive manufacturing of devices and components that require high-temperature polymers.
Claims14
A polyimide, said polyimide being a thermotropic liquid crystal, said polyimide having the following formula:
- wherein:
- n is an integer from 2 to 100;
- each Z is independently hydrogen or a phenylethynyl group;
- W has the following formula
- Ar has one of the following formula:
- wherein R is OMe, CN or F.
3 more elements
Dependencies are inferred from the claim text.