Multilayer lacquering process

US5882734A · 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: Mar 16, 1999
• Expiry date: Nov 25, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05D7/577
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

In a process for producing a multilayer lacquer coating, eg for motor vehicles, a first coating layer of an aqueous coating agent (1) is electrophoretically applied on to an electrically conductive substrate and is then stoved. As the coating agent (I), a coating agent which, in the stoved state, will produce an electrically conductive coating layer is used. An electrically insulating second coating layer of an aqueous coating agent (II), which differs from (I), is electrophoretically deposited and stoved. A third basic lacquer coating layer of a colour-giving and/or effect-producing coating agent is applied, and a fourth transparent coating layer of a clear lacquer coating agent is applied, the last-mentioned two coats being stoved together. One or more further transparent coating layers may be applied.