N-substituted polyamide-imide

US5229484A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Wolf · Gaithersburg, US
• Juergen Koch · Schifferstadt, DE

Key dates

• Filing date: Jan 17, 1992
• Grant date: Jul 20, 1993
• Expiry date: Jan 17, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An N-substituted polyamide-imide essentially composed of identical or different repeating units of the formula I ##STR1## where R.sup.1 is one of the following tetravalent aromatic radicals ##STR2## and X is a bond or one of the following linkers ##STR3## where R.sup.2 and R.sup.4 are each, independently of one another, one of the following divalent aromatic radicals ##STR4## and where X has the abovementioned meanings and where R.sup.3 is hydrogen or a monovalent radical such as C.sub.1 -C.sub.6 -alkyl or phenyl, and the C.sub.1 -C.sub.6 -alkyl-, C.sub.1 -C.sub.6 -alkoxy-, aryl- or halogen-substituted derivatives thereof, and precursors (monomers) therefor, are described.