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Triamine-Modified Polyimides Having Improved Processability and Low Melt Flow ViscosityAddition-cured polyimides that contain the reaction product of an aromatic triamine or trianhydride analogue thereof, a reactive end group such as 5-norbornene-2, 3-dicarboxylic acid, ester derivatives of 5-norbornene-2, 3-dicarboxylic acid, anhydride derivatives of 5-norbornene-2, 3-dicarboxylic acid, or 4-phenylethynylphthalic anhydride, an aromatic diamine, and a dialkyl ester of an aromatic tetracarboxylic acid. The resultant starlike polyimides; exhibit lower melt flow viscosity than its linear counterparts, providing for improved processability of the polyimide. Also disclosed are methods for the synthesis of these polyimides as well as composite structures formed using these polyimides.
Document ID
20010094779
Acquisition Source
Glenn Research Center
Document Type
Other - Patent
External Source(s)
LEW-16968-1
Authors
Michael A Meador
(Glenn Research Center Cleveland, United States)
Baochan N Nguyen
(Glenn Research Center Cleveland, United States)
Ronald K Eby
(Glenn Research Center Cleveland, United States)
Date Acquired
August 20, 2013
Publication Date
July 17, 2001
Publication Information
Publisher: United States Patent and Trademark Office
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-6,262,223
Patent Application
US-Patent-Appl-SN-118479|US-Patent-Appl-SN-495599
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