Diamines and polyimides containing pendent ethynyl groups
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsPaul M. Hergenrother, Brian J. Jensen
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Abstract
Diamines containing pendent ethynyl and substituted ethynyl groups are synthesized. These diamines are reacted with dianhydrides to form polyamide acids, which are chemically or thermally cyclodehydrated to form polyimides and copolyimides with pendent ethynyl groups. Upon heating, the pendent ethynyl groups react to form crosslinked resins that are useful as adhesives, composite matrices, coatings, moldings and films.
Claims4
A diamine having a pendent ethynyl or substituted ethynyl group and having the following structural formula:
- ##STR10## wherein R is a member selected from the group consisting of hydrogen, alkyl, and phenyl, and R' is a member selected from the group consisting of CH.sub.3 and CF.sub.3.
Dependencies are inferred from the claim text.