Paint binder

US3994989A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Mar 24, 1975
• Grant date: Nov 30, 1976
• Expiry date: Mar 24, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31529
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Paint binder prepared by reacting Mannich bases (a) with an epoxide resin (b). The Mannich bases (a) are prepared from: PA1 1. a condensed phenol which is free from ether groups and contains at least two phenolic hydroxyl groups, PA1 2. a condensed phenol containing ether groups and also containing at least one phenolic hydroxyl group, PA1 3. a secondary amine containing at least one hydroxyalkyl group and PA1 4. formaldehyde. The paint binders may be used in protonized form for the cathodic electrocoating of electrically conducting surfaces.