Polyester imides and method for producing same

US4687834A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Martin Bartmann · Recklinghausen, DE
• Wolfgang Seeliger · Marl, DE

Key dates

• Filing date: Jul 22, 1986
• Grant date: Aug 18, 1987
• Expiry date: Jul 22, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a method of producing polyester imides of the formula ##STR1## by reacting tetracarboxylic acid dianhydrides of the formula ##STR2## with N,N'-bis(.OMEGA.-hydroxyalkyl)dicarboxylic acid diamides of the formula, HO--Z--NH--CO--B--CO--NH--Z--OH, where PA0 A represents a quadrivalent aromatic group with 6-32 C atoms, wherein up to 40% of A may be replaced by a quadrivalent aliphatic group with up to 16 C atoms, PA0 B represents a divalent aliphatic or aromatic group with up to 14 C atoms, PA0 Z represents an alkylene group with 2-3 C atoms, and PA0 n is a number from 3 to 500.