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US 12,017,972 B2Granted
All-aromatic liquid-crystalline homo-polyimides with aromatic endgroups and crosslinked products therefrom
AssigneeThe Government of the United States of America as Represented by the Secretary of the Air Force
InventorsLoon-Seng Tan, Zhenning Yu
Life of this patent
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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.
Claims1
A molecule having the following formulae:
Dependencies are inferred from the claim text.