Thickeners for aqueous dispersions

US6803405B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Klaus Schnell · Neustadt, DE
• Michael Kerber · Cleveland Heights, US
• Eberhard Schupp · Schwetzingen, DE
• Eckehardt Wistuba · Bad Dürkheim, DE

Key dates

• Filing date: Mar 29, 2002
• Grant date: Oct 12, 2004
• Expiry date: Jan 2, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F218/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to the aqueous preparation of a polymer. Said preparation contains a copolymer consisting of a) 30 to 79.5 wt. % N-vinylpyrrolidone, b) 20 to 69.5 wt. % vinylacetate, c) 0.5 to 25 wt % of a monovinyl ester of a C4 to C20 monocarboxylic acid and d) 0 to 40 wt. % of an additional, copolymerisable, ethylenically unsaturated compound.