Method for producing a multicoat paint system

US10196528B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Bernhard Steinmetz · Meiningen, DE
• Nadia Luhmann · Karlstadt, DE
• Peggy Jankowski · Würzburg, DE
• Michael Matura · Würzburg, DE
• Hardy Reuter · Kohlenbissen, DE
• Peter Hoffmann · Senden, DE

Key dates

• Filing date: Dec 11, 2014
• Grant date: Feb 5, 2019
• Expiry date: Aug 15, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D13/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for producing a multicoat paint system on a metallic substrate, in which a basecoat or a plurality of directly successive basecoats are produced directly on a metallic substrate coated with a cured electrocoat, a clearcoat is produced directly on the one basecoat or the uppermost of the plurality of basecoats, and then the one or more basecoats and the clearcoat are jointly cured, and wherein at least one basecoat material used for production of the basecoats comprises the following components: an aqueous dispersion comprising at least one specific copolymer, a specific linear hydroxy-functional reaction product and a polyurethane resin, the preparation of which involves using at least one compound containing at least one carboxylic acid group and at least one group reactive toward isocyanate groups.