Process for preparing heat-curable, water-dilutable coating compositions and their use as coatings

US4383055A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gerhard Johannes · Taunusstein, DE
• Helmut Durr · Frankfurt am Main, DE
• Dieter Plath
• Diedrich Schneider · Wiesbaden, DE
• Klaus Esser · Hösbach, DE

Key dates

• Filing date: Oct 7, 1981
• Grant date: May 10, 1983
• Expiry date: Oct 7, 2001

Classification

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

Abstract

Preparation of heat-curable, water-dilutable coating compositions based on (A) epoxy resins free from amino groups, (B) an aqueous dispersion or solution of saturated polyester resins or the modification products thereof with oils, (C) organic cross-linking agents and optionally (D) pigments and/or conventional adjuvants, in specific proportions, these components being processed together in one or more stages, while being comminuted from their original particle size, to form a homogeneous coating composition which has a particle size of less than 100 .mu.m, and the use of the coating compositions thus obtained as coating agents, particularly for coating metal substrates, by the use of current-free methods of application or electrostatic spraying.