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US 4,395,540 AGranted
Thermoset-thermoplastic aromatic polyamide containing N-propargyl groups
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsTerry L. St. Clair, James F. Wolfe, Thomas D. Greenwood
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Abstract
A novel composition and method for increasing the use temperature of polyamides based on the incorporation of a latent crosslinking agent into the polymer backbone, wherein high temperature performance is achieved without sacrificing solubility or processability.
Claims7
A solvent stable thermosetting polyamide having improved heat distortion temperature characteristics and comprising repeating units of the formula:
- ##STR8## wherein R represents a mixture of --CH.sub.3 and --CH.sub.2 --C.tbd.CH in varying percentages.
Dependencies are inferred from the claim text.