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Diphenylmethane-containing dianhydride and polyimides prepared therefromA high temperature stable, highly optically transparent-to-colorless, low dielectic linear aromatic polyimide is prepared by reacting an aromatic diamine with 3,3'bis (3,4-dicarboxyphenoxy) diphenylmethane dianhydride in an amide solvent to form a linear aromatic polyamic acid. This polyamic acid is then cyclized to form the corresponding polyimide.
Document ID
19930019896
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
St.clair, Anne K. (Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Boston, Harold G. (NASA Langley Research Center Hampton, VA, United States)
Pratt, J. Richard (Lockheed Engineering and Sciences Co. Hampton, VA., United States)
Date Acquired
August 15, 2013
Publication Date
June 8, 1993
Subject Category
Nonmetallic Materials
Report/Patent Number
Patent Number: NASA-CASE-LAR-14487-1
Patent Number: US-PATENT-5,218,077
Patent Application Number: US-PATENT-APPL-SN-750158
Accession Number
93N29085
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LAR-14487-1|US-PATENT-5,218,077
Patent Application
US-PATENT-APPL-SN-750158

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