Process for the production of a multicoat finish and aqueous basecoat suitable for this process

US5601880A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Stephan Schwarte · Münster, DE
• Arnold Dobbelstein · Cologne, DE
• Walter Lassmann · Munster, DE
• Susanne Piontek · Munster, DE
• J urgen Niemann · Munich, DE
• Klaus Eikelmann · Würzburg, DE
• Ulrich Poth · Munster, DE

Key dates

• Filing date: Aug 5, 1994
• Grant date: Feb 11, 1997
• Expiry date: Aug 5, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D151/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to basecoats for the production of paint systems of the basecoat-clearcoat type, which comprise a water-thinnable polyacrylate resin obtainable by polymerizing in a first stage in an organic solvent ethylenically unsaturated monomers free from carboxyl groups and, after at least 80% by weight of these monomers have reacted, polymerizing in a second stage monomers containing carboxyl groups and neutralizing the polyacrylate resin obtained in this way.