Aqueous dispersions of hydrosoluble polymerisates of ethylenically unsaturated anionic monomers, method for the production and use thereof

US7754804B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Pulakesh Mukherjee · Mannheim, DE
• Marc Leduc · Speyer, DE
• Peter Claassen · Ludwigshafen, DE
• Werner Gauweiler · Lustadt, DE
• Roland Nowack · Birkenheide, DE

Key dates

• Filing date: Jul 17, 2004
• Grant date: Jul 13, 2010
• Expiry date: Nov 20, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F291/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.