Compounds containing hydroxyl groups and urethano-aryl-sulfonic acid groups

US4174434A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dieter Dieterich
• Gerhard Balle · Cologne, DE
• Hans G. Schmelzer · Stommeln, DE

Key dates

• Filing date: Jul 31, 1978
• Grant date: Nov 13, 1979
• Expiry date: Jul 31, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/775
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The instant invention is directed to compounds having an average molecular weight of from 300 to 12,000, containing: at least one hydroxyl group and at least one urethano-aryl-sulfonic acid group and a method for their preparation. The process is characterized as a process for the preparation of compounds having a number average molecular weight of from 300 to 12,000 having at least one hydroxyl group and at least one urethano-aryl-sulfonic acid group, comprising: reacting at from 0.degree. to 190.degree. C. PA0 (A) compounds having a molecular weight of from 62 to 10,000 having at least two hydroxyl groups; with PA0 (B) aromatic isocyanato sulfonic acids, wherein the equivalent ratio of the total quantity of isocyanate groups (including any isocyanate groups present in dimerized form) to sulfonic acid groups is from 0.5:1 to 50:1 and the equivalent ratio of the sum of hydroxyl groups in (A) to NCO groups is from 1.5:1 to 30:1. The invention is also directed to the product by the process.