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

摘要

PCT No. PCT/SE93/00732 Sec. 371 Date Mar. 16, 1994 Sec. 102(e) Date Mar. 16, 1994 PCT Filed Sep. 9, 1993 PCT Pub. No. WO94/06840 PCT Pub. Date Mar. 31, 1994.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.