Multilayer lacquering process

US5908667A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Joachim Blum · Remscheid, DE
• Dieter Stranghoner · Sprockhövel, DE
• Dieter Engel · Kelsterbach, DE
• Klausjorg Klein · Wuppertal, DE
• Walter Kuhhirt · Remscheid, DE
• Matthias Kimpel · Schwelm, DE
• Friedrich-Ludwig Siever · Schwelm, DE

Key dates

• Filing date: Nov 25, 1997
• Grant date: Jun 1, 1999
• Expiry date: Nov 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D13/22
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Process for producing a multilayer lacquer coating, in which a primer of an electrophoretically depositable aqueous coating agent (1) is electrophoretically applied on to an electrically conductive substrate and is then stoved, whereupon a color-giving and/or effect-producing base lacquer coat of an aqueous coating agent (II) is applied and stoved and this coat is then provided with one or more clear lacquer coatings, in which process PA1 a) as the coating agent (I), a coating agent which, in the stoved state, will produce an electrically conductive primary coat is used, PA1 b) the base lacquer coat is formed by an electrophoretically depositable aqueous coating agent (II) by a process of electrophoretical deposition, PA1 c) the overall dry layer thickness of the dry lacquer coat or dry lacquer coats is about 40 and 80 .mu.m, and PA1 d) the overall dry layer thickness of the multilayer lacquer coating is about 80 to 110 .mu.m.