Preparation of aqueous synthetic wax dispersions

US4996259A · kind A · utility

Assignee

• BASF SE

Inventors

• Gernot Koehler · Ludwigshafen, DE
• Juergen Schmidt-Thuemmes · Schifferstadt, DE
• Norbert Hasenbein · Dirmstein, DE
• Lothar Schlemmer · Frankenthal (Pfalz), DE
• Wolfram Dietsche · Bischofswerda, DE

Key dates

• Filing date: Aug 23, 1989
• Grant date: Feb 26, 1991
• Expiry date: Aug 23, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous synthetic wax dispersions which contain, as an essential component of the solid substance, a partially or completely neutralized copolymer of a C.sub.2 -C.sub.4 -olefin and an unsaturated mono- or dicarboxylic acid or dicarboxylic anhydride are prepared by neutralizing and dispersing the solid substance in an aqueous medium at above the melting point of the copolymer, by a method in which the processes of neutralization and of dispersion are carried out in one extruder or in a plurality of extruders connected in series.