Aqueous polymer dispersions, aqueous coating materials based on these polymer dispersions, and processes for the finishing of motor-vehicle bodies

US5898045A · kind A · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Stephan Schwarte · Münster, DE
• Dietmar Chmielewski · Munster, DE
• Georg Wigger · Kohlenbissen, DE

Key dates

• Filing date: Jun 13, 1996
• Grant date: Apr 27, 1999
• Expiry date: Jun 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F283/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous polymer dispersion, comprising an at least 20% neutralized, free-radical polymerized product of A and B in a ratio of one part A to from 0.5 to 9.0 parts B by weight; wherein PA1 A consists essentially of from 2.5 to 13% by weight of at least one acid group-containing, ethyleneically unsaturated monomer and from 87 to 97.5% by weight of at least one ethylenically unsaturated monomer that is free from acid groups, and further wherein PA1 B is a reaction product of at least one compound containing at least 1.5 epoxide groups per molecule on average and at least one member of the group consisting of: (1) mixtures of ethylenically unsaturated monocarboxylic acids, saturated fatty acids, and monoesters of ethylenically unsaturated dicarboxylic acids and saturated fatty alcohols; and (2) mixtures of saturated fatty acids and monoesters of ethylenically unsaturated dicarboxylic acids and saturated fatty alcohol.