Water-soluble polyurethane and use thereof to thicken water-based systems such as water-based paints

US5496908A · kind A · utility

Assignee

• Berol Nobel AB · SE

Inventors

• Peter Bostrom · Ytterby, SE
• Annelie Askenbom · Stenungsund, SE
• Eva Gottberg-Klingskog · Mörbylånga, SE

Key dates

• Filing date: Mar 16, 1994
• Grant date: Mar 5, 1996
• Expiry date: Mar 16, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A water-soluble polyurethane, including a polymer backbone; end groups provided on the ends of the polymer backbone and containing water-soluble oxyethylene groups having a molecular weight ranging from 400 to 15,000, and groups pendant from the polymer backbone and containing hydrocarbon groups having 8-22 carbon atoms, in a number of at least 0.1 per urethane bond. The water-soluble polyurethane has moderate viscosities in aqueous solution and is especially useful as a thickener, for instance, in alkyd- or latex-based paints.