Aqueous polymer dispersions

US5536779A · kind A · utility

Assignee

• BASF SE

Inventors

• Kurt Wendel
• Thomas Schwerzel · Meckenheim, DE
• Guenter Hirsch · Mutterstadt, DE

Key dates

• Filing date: Aug 8, 1994
• Grant date: Jul 16, 1996
• Expiry date: Aug 8, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L3/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A polymer powder obtained by drying an aqueous polymer dispersion, wherein the aqueous polymer dispersion is obtained by free-radical polymerization of unsaturated monomers and contains at least one added starch-degradation product which is obtained by hydrolysis in the aqueous phase, is water soluble at room temperature and has a weight average molecular weight M.sub.w of from 2500 to 25000.