Method of reducing the content of residual monomers in aqueous polymer dispersions

US6444760B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Robert Rupaner · Ludwigshafen, DE
• Gerhard Bauer · Düsseldorf, DE
• Sven Lawrenz · Mannheim, DE
• Claudia Heibel · Weinheim, DE
• Johannes Dobbelaar · Monsheim, DE

Key dates

• Filing date: Mar 17, 2000
• Grant date: Sep 3, 2002
• Expiry date: Mar 17, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/006
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process is described for effectively reducing the residual monomer content of an aqueous polymer dispersion by aftertreatment at atmospheric pressure or above with an initiator system comprising a) a hydroperoxide, hydrogen peroxide or a peracid, and b) an &agr;-hydroxy carboxylic acid, such as tartaric acid, or with a salt thereof.