Pre-condensed, thermosetting aqueous varnish coating agent and its utilization for cathodic deposition upon electrically conducting surfaces

US4373059A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Hans-Peter Patzschke · Wuppertal, DE
• Armin Gobel · Syke, DE

Key dates

• Filing date: Sep 2, 1980
• Grant date: Feb 8, 1983
• Expiry date: Sep 2, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S524/901
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a pre-condensed, thermosetting aqueous lacquer coating material containing a pre-condensation product that becomes water-dilutable after protonization with acids and has a mean molecular weight [M.sub.n ] of 800 to 15,000, obtainable by heating of 55 to 95% by weight, based on the total quantity of the binding agent, of an organic synthetic-resin binder containing primary and/or secondary amino groups which has an amine number of 30 to 150 and 5 to 45% by weight of a crosslinking agent possessing esterified terminal carboxyl groups. The invention moreover concerns the application of this lacquer coating material for cathodic deposition upon electrically conducting surfaces.