Diimidodicarboxylic acids

US4145351A · kind A · utility

Assignee

• Dr. Beck + CO.AG · DE

Inventors

• Karl Schmidt · Hamburg, DE
• Ferdinand Hansch · Wedel, DE
• Hans-Malte Rombrecht · Hamburg, DE

Key dates

• Filing date: Jun 11, 1976
• Grant date: Mar 20, 1979
• Expiry date: Jun 11, 1996

Classification

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

Abstract

Diimidodicarboxylic acids for the preparation of polyester resins which in addition to ester groups, contain imide groups between functional groups of the molecule. The imide groups are in the form of 5-membered imide rings resulting from the condensation of, for example, an aromatic carboxylic acid anhydride and a primary amine. The resins can be used in lacquers for production of insulated electrical conductors, with the resin being the film forming component of the lacquers.