Surface-coating binders

US4086292A · kind A · utility

Assignee

• BASF SE

Inventors

• Fritz E. Kempter · Mannheim, DE
• Heinrich Hartmann · Schifferstadt, DE
• Herbert Spoor · Schifferstadt, DE

Key dates

• Filing date: Aug 12, 1976
• Grant date: Apr 25, 1978
• Expiry date: Aug 12, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D163/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A surface-coating binder which is substantially free from epoxide groups is obtained by reacting Mannich bases, obtained from condensed phenols, secondary amines which contain at least one hydroxyalkyl group, and formaldehyde, with epoxy resins having an epoxide value of from 0.15 to 0.6, which carry blocked isocyanate groups. In the protonized form, the binders may be used for the cationic electrocoating of metal articles.