Electrophoretically overcoatable coatings applied by electrocoating

US4882090A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Wolfgang Batzill · Munster, DE
• Ulrich Heilmann · Munster, DE
• Hans-Joachim Streitberger · Munster, DE
• Harald Guder · Wuppertal, DE
• Fritz Beck · Duisburg, DE

Key dates

• Filing date: Aug 17, 1987
• Grant date: Nov 21, 1989
• Expiry date: Aug 17, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05D1/007
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to cathodically depositable aqueous electropaints which contain cationic amine-modified epoxy resins and are pigmented with electroconductive carbon black and which, on deposition and crosslinking, provide electrophoretically overcoatable coatings and contain as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N.sub.2) of 850-1,000 m.sup.2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25-35 nm in an amount of 1.5 to 5.1% by weight - based on total solids.