Polyimides from 4-(3-aminophenoxy)benzoic acid
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert S. Irwin
Life of this patent
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Abstract
Thermoplastic poly(imide-esters) and poly(imide-amides) with repeat units derived from the title amino acid. In the polymer the amino group becomes part of an imide group and the carboxyl group becomes part of an ester or amide group. The polymers have a good balance of properties, making them useful for melt forming shaped articles, films and fibers.
Claims18
A thermoplastic, comprising, a poly(imide-ester) or a poly(imide-amide), which contains a repeat unit of the formula ##STR7## wherein the nitrogen atom is part of an aromatic imide group of the formula ##STR8## where bond (a) is part of an aromatic ring, and the carbonyl group of structure I is part of an ester or amide group.
Dependencies are inferred from the claim text.