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US 9,434,832 B1Granted
Polyimide aerogels having polyamide cross-links and processes for making the same
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorMary Ann B. Meador
Life of this patent
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Abstract
An aerogel and process of making the aerogel is provided. The aerogel is a polyimide aerogel having polyamide cross-links formed using a triacid chloride cross-linker.
Claims20
An aerogel, comprising:
- a polyimide oligomer component;
- and
- a polyamide cross-link, the polyamide cross-link connected to the polyimide component, the polyimide oligomer component comprising the reaction product of a diamine and a dianhydride in a ratio of (n+1) to n where n is the number of repeat units in the oligomer.
A process for making a polyimide aerogel, comprising:
- providing a polyimide oligomer solution;
- chemically imidizing the polyimide oligomers of the provided polyimide oligomer solution, the polyimide oligomers comprising amine terminated polyimide oligomers;
- and
- adding triacid chloride to the imidized polyimide oligomer solution to cross-link polyimide oligomers of the polyimide oligomer solution.
1 more element
Dependencies are inferred from the claim text.