Preparation of an aqueous polymer dispersion

US5430092A · kind A · utility

Assignee

• BASF SE

Inventors

• Oral Aydin · Mannheim, DE
• Josef Neutzner · Neustadt, DE
• Walter Maechtle · Ludwigshafen, DE

Key dates

• Filing date: Feb 28, 1994
• Grant date: Jul 4, 1995
• Expiry date: Feb 28, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F291/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for preparing a final aqueous polymer dispersion having a solids volume concentration of 50% by volume or more, free-radically polymerizable monomers other than vinyl or vinylidene halides are subjected to a free radical aqueous emulsion polymerization by the feed stream addition process in the presence of an aqueous starting polymer dispersion whose dispersed starting polymer particles have a certain minimum diameter.