Polyurethane thickeners

US8871817B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Holger Türk · Mannheim, DE
• Volker Wendel · Seeheim-Jugenheim, DE

Key dates

• Filing date: Oct 21, 2011
• Grant date: Oct 28, 2014
• Expiry date: Oct 21, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2115/02
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to a single-stage process for preparing polyurethanes which comprise at least three hydrophilic sections, at least four hydrophobic sections, optionally allophanate segments and optionally isocyanurate segments, in the presence of alkali(ne earth) metal carboxylates or zinc carboxylates. Furthermore, the present invention relates to the polyurethanes themselves obtainable in this way, to the use thereof as thickeners for aqueous preparations, and to aqueous preparations comprising polyurethanes of this type.