Aqueous electrodip lacquer coating compound capable of being deposited at the cathode, and its use

US4595717A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

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

Key dates

• Filing date: Oct 1, 1984
• Grant date: Jun 17, 1986
• Expiry date: Oct 1, 2004

Classification

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

Abstract

Aqueous electrodip lacquer coating compound capable of being deposited cathodically, containing, as synthetic resin binder, PA0 (A) 55 to 95% by weight of synthetic resin binder which can be rendered water soluble by protonation with acid and PA0 (B) 5 to 45% by weight of a cross-linking agent containing ester groups capable of transesterification and/or transamidation and having terminal ester groups which are substantially stable in a neutral aqueous medium but capable of reacting with synthetic resin binder (A) in an alkaline medium at temperatures above 140.degree. C., component (A) containing in its molecule at least one molecule-enlarging diamine of the formula ##STR1## wherein the symbol Y stands for H or C.sub.m H.sub.2m+1 (m=1 to 8) or an organic group used for defunctionalization, which is formed by the reaction of the primary amino group with monoepoxides, and the symbol X represents a molecular grouping having at least one amide and/or urea group.