Process for the production of modified polyisocyanates

US4077989A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Walter Schafer · Leichlingen, DE
• Kuno Wagner · Leverkusen, DE

Key dates

• Filing date: Nov 23, 1976
• Grant date: Mar 7, 1978
• Expiry date: Nov 23, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/831
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The instant invention relates to a process for the production of novel modified polyisocyanates containing acylated urea groups and to the products obtained from this process. The process of the instant invention comprises reacting a compound containing isocyanate groups and carbodiimide groups with carboxylic acids in such quantities that from about 0.2 to about 1.2 gram equivalents of carboxyl groups are reacted per gram equivalent of carbodiimide groups.