Heat-curable coating composition for cathodic electrocoating

US5188716A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Thomas Schwerzel · Meckenheim, DE
• Hans Schupp · Worms, DE
• Klaus Huemke · Friedelsheim, DE
• Dieter Faul · Niederkirchen, DE
• Ulrich Heimann · Munster, DE

Key dates

• Filing date: Feb 8, 1990
• Grant date: Feb 23, 1993
• Expiry date: Feb 8, 2010

Classification

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

Abstract

A heat-curable coating composition for cathodic electrocoating which becomes water-thinnable on protonation with an acid contains PA0 (A) 50-95% by weight of a polycondensation or polyaddition product having an average molecular weight of from 500 to 20,000 and containing primary and/or secondary hydroxyl groups and primary, secondary and/or tertiary amino groups, and PA0 (B) 5-50% by weight of a crosslinking agent obtainable by reacting PA1 a) an aliphatic polyhydroxy compound and PA1 b) an aromatic polyhydroxy compound with PA1 c) an aliphatic and/or cycloaliphatic polyisocyanate and PA1 d) a blocking agent.