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US 8,546,614 B1Granted
Multifunctional crosslinkers for shape-memory polyimides, polyamides and poly(amide-imides) and methods of making the same
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsLoon-Seng Tan, David Huabin Wang
Life of this patent
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Abstract
Multifunctional amine crosslinkers that may be used to create crosslinked polyimide, polyamide, and poly(amide-imide) polymers and films having shape memory properties at elevated temperatures and methods of making the same.
Claims1
A trifunctional crosslinker having the general formula:
- wherein W is selected from a group consisting of CH3C, N, P═O, or B(—O)3;
- R is F, Cl, or CH3 when W is CH3C and R is H, F, Cl, CF3, or CH3 when W is N, P═O, or B(—O)3;
- and the amine groups are located meta or para with respect to R.
Dependencies are inferred from the claim text.