Method of producing aqueous polymer dispersions

US5385971A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Thomas Sauer · Rellingen, DE
• Bernhard Stutzel · Marl, DE

Key dates

• Filing date: Mar 22, 1993
• Grant date: Jan 31, 1995
• Expiry date: Mar 22, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method of producing sterically stabilized polymer dispersions by polymerizing ethylenically unsaturated monomers in an aqueous phase (as a dispersion medium) in the presence of an initiator system and a water-soluble macromonomer which is an esterification product of maleic acid, fumaric acid, maleic anhydride, or mixture thereof and polyalkylene glycols and/or monoalkyl ether of polyalkylene glycol, having a degree of esterification between 50% and 100%. The dispersions obtained according to this method possess high electrolyte stability, shear stability, and frost stability, even without addition of conventional emulsifiers and emulsification adjuvants.