Preparation of crosslinked polyurethane ionomer dispersions

US4507431A · kind A · utility

Assignee

• BASF SE

Inventors

• Herbert Stutz · Karlsruhe, DE
• Gunter Eckert · Schifferstadt, DE

Key dates

• Filing date: Sep 8, 1983
• Grant date: Mar 26, 1985
• Expiry date: Sep 8, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/724
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous dispersions of crosslinked polyurethane ionomers can be advantageously obtained by a method in which polyurethane prepolymers possessing salt groups and aliphatically and/or cycloaliphatically bonded terminal isocyanate groups, in a water-miscible organic solvent, are mixed with polyfunctional polyisocyanates, the resulting solution is dispersed in water and the organic solvent is evaporated off.