NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Fire and Heat Resistant Laminating Resin Based on Maleimido and Citraconimido Substituted 1-(Diorganooxyphosphonyl-Methyl)-2,4- and -2,6-DiaminobenzenesThe subject invention pertains to a novel class of fire-and heat-resistant bisimide resins prepared by thermal polymerization of maleimido or citraconimido substituded 1-(dialkoxyphosphonyl)-methyl-2-4 and -2,6-diaminobenzenes. Typical polymer presursors have the chemical structure wherein R is alkyl, substituted alkyl or aryl, and R sup 1 is hydrogen or lower alkyl. The polymer precursors are prepared by reacting 1-(diorganooxyphosphonyl)methyl-2-4 and -2,6-diaminobenzenes with maleic anhydride or citraconic anhydride in a mole ratio 1:2. Chains extension of the monomers is achieved by reacting the mono-N-maleimido derivatives of 1-(diorganooxyphosphonyl)methyl-2,4 and -2,6-diaminobenzenes with aryl tetracarboxylic dianhydrides, such as benzophenone tetracarboxylic diandydride, or aryl diisocyanates, such as methylenebis (4-phenylisocyanate), in a mole ratio 2:1. The polymerization of the monomers is studied by differential scanning calorimetry (DSC) and the thermal stability of the polymers is ascertained by thermogravimetric analysis (TGA).
Document ID
19890006671
Acquisition Source
Ames Research Center
Document Type
Other - Patent
External Source(s)
ARC-11533-2
Authors
James M Beggs
(National Research Council Canada Ottawa, Canada)
John A Mikroyannidis
(National Research Council Canada Ottawa, Canada)
Demetrius A Kourtides
(National Academies of Sciences, Engineering, and Medicine Washington, United States)
Date Acquired
August 14, 2013
Publication Date
October 4, 1988
Publication Information
Publisher: United States Patent and Trademark Office
Subject Category
Nonmetallic Materials
Accession Number
89N16042
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,775,740
Patent Application
US-PATENT-APPL-SN-852461
No Preview Available