Aqueous epoxy resin dispersions

US5424340A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Armin Pfeil · Kaufering, DE
• Joerg-Peter Geisler · Ingelheim am Rhein, DE
• Paul Oberressl · Wiesbaden, DE
• Dieter Dreischhoff · Wiesbaden, DE

Key dates

• Filing date: Mar 23, 1994
• Grant date: Jun 13, 1995
• Expiry date: Mar 23, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31511
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous epoxy resin dispersions containing PA0 (A) an epoxy resin which is a condensation product of one or more epoxy compound(s), of an aromatic polyol and, if used, of a modifying compound having at least two groups which are reactive with epoxides, PA0 (B) a dispersing agent in the form of a condensation product of an aliphatic polyol and an epoxy compound, the equivalent ratio of the OH groups to the epoxy groups being 1:0.8 to 1:3.5, PA0 (C) a carboxyl-containing or -releasing curing agent for the epoxy resin comprising one or more carboxyl-containing compound(s), at least one of these compounds having a functionality of at least three carboxyl groups per molecule, and PA0 (D) if desired customary additives, components (A), (B) and (C) being used in such amounts by weight that the equivalent ratio of the epoxy groups of component (A) capable of reacting to the carboxyl groups of component (B) is at least 1:0.5.