Surface-coating binders

US4260697A · kind A · utility

Assignee

• BASF SE

Inventors

• Fritz E. Kempter · Mannheim, DE
• Heinrich Hartmann · Schifferstadt, DE
• Erich Gulbins · Heidelberg, DE

Key dates

• Filing date: Aug 10, 1978
• Grant date: Apr 7, 1981
• Expiry date: Aug 10, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/4028
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Surface-coating binders based on a reaction product of Mannich bases, obtained from polyhydric phenols, secondary amines and formaldehyde, with epoxy resins. The Mannich bases and/or the epoxy resins carry hydroxyl groups, bonded to aliphatic structures, which have been converted to urethane groups by reaction with partially blocked polyisocyanates. When protonized and diluted with water, the surface-coating binders may be used as cationic electrocoatings.