Ethynyl-Containing Aromatic Polyamide Resin.
Patent, Filed 10 Dec 85, patented 5 May 87,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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This patent discusses Aromatic polyamide resins having repeating units, each containing at least one m-ethynyl amido subunit. These resins can be thermally treated to undergo intramolecular cyclization, without evolution of volatiles, into polyimidines containing the following subunit.
- Organic Chemistry