Electrocoating binders which are water-dilutable on protonation with an acid, for the production of thick coating films, based on monofunctionally initiated epoxy resins

US5130350A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Thomas Schwerzel · Meckenheim, DE
• Hans Schupp · Worms, DE
• Dirk Lawrenz · Ludwigshafen am Rhein, DE
• Hans-Josef Oslowski · Munster, DE
• Ulrich Heimann · Munster, DE

Key dates

• Filing date: Apr 8, 1991
• Grant date: Jul 14, 1992
• Expiry date: Apr 8, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/54
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Cathodic electrocoating binders which are water-dilutable on protonation with an acid are obtainable by reacting PA0 A) an epoxy compound or a mixture of epoxy compounds having an epoxide equivalent weight of less than 2,000 with PA0 B) a compound which is monofunctional with respect to epoxides and contains aliphatic or phenolic OH groups and PA0 C) a secondary amine of 2 to 36 carbon atoms, with the proviso that the reaction product of A), B) and C) still contains free epoxy groups, and PA0 D) an amount of an amidoamine containing primary amino groups which is equivalent to or greater than the amount of these free epoxy groups, the said amidoamine being obtainable from a primary diamine and a mono- and/or dicarboxylic acid.