Polyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groups

US4212982A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jurgen Lewalter · Odenthal, DE
• Rudolf Merten · Leverkusen, DE
• Wilfried Zecher · Leverkusen, DE
• Willi Dunwald · Leverkusen, DE

Key dates

• Filing date: Nov 8, 1978
• Grant date: Jul 15, 1980
• Expiry date: Nov 8, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/902
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Polyiso(thio)cyanates containing a (thio)hydantoin ring substituted by carboxylic acid amide groups in the molecule are obtained by reacting optionally substituted ethylene- 1,2-dicarboxylic acid anhydrides with amino alcohols and an excess of polyiso (thio) cyanates.