Method for producing an aqueous dispersion of particles made up of polymerisate and fine inorganic solid material

US6756437B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Zhijian Xue · Ludwigshafen, DE
• Harm Wiese · Heidelberg, DE

Key dates

• Filing date: Mar 8, 2002
• Grant date: Jun 29, 2004
• Expiry date: Mar 11, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing an aqueous dispersion of composite particles composed of addition polymer and finely divided inorganic solid, in which process at least one ethylenically unsaturated monomer is dispersely distributed in aqueous medium and is polymerized by the method of free-radical aqueous emulsion polymerization by means of at least one free-radical polymerization initiator in the presence of at least one dispersely distributed, finely divided inorganic solid and at least one dispersant.