Cathodic electrocoating binders

US4172193A · kind A · utility

Assignee

• BASF SE

Inventors

• Matthias Marx · Fürstenfeldbruck, DE
• Erich Gulbins · Heidelberg, DE

Key dates

• Filing date: Sep 26, 1978
• Grant date: Oct 23, 1979
• Expiry date: Sep 26, 1998

Classification

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

Abstract

Cathodic electrocoating binders based on polycondensation products which contain amino groups and which are, at least partially, in the form of their ammonium salts or quaternary ammonium salts. The polycondensation products containing amino groups are obtained by adduct formation of p-hydroxyacetophenone with polymers containing epoxide groups, followed by reaction of these adducts with formaldehyde and a secondary amine. The electrocoating binders of the invention may be used for coating metallic substrates and give coatings which are particularly corrosion-resistant and adhere particularly firmly.