Process for the production of plastics containing amide groups

US5527876A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Hermann Kluth · Goldkronach, DE
• Peter Daute · Beverstedt, DE
• Johann Klein · Goldkronach, DE
• Roland Gruetzmacher · Wülfrath, DE
• Wolfgang Klauck · Meerbusch, DE

Key dates

• Filing date: Jul 29, 1994
• Grant date: Jun 18, 1996
• Expiry date: Jul 29, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2310/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of plastics containing amide groups with elimination of CO.sub.2 by reaction of polyfunctional isocyanates, carboxylic acids and, optionally, alcohols in the presence of tertiary amines, more particularly heteroaromatic amines. The heteroaromatic amines preferably contain another heteroatom and/or substituents having +I and/or +M effects. The reaction preferably starts at room temperature. Fine-cell foams having an acid value of less than 40 and a density of at most 150 g/l can be produced in short reaction times at room temperature without any need for additional blowing agents.