Curing agents for aqueous epoxy resin dispersions

US5539023A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Dieter Dreischhoff · Wiesbaden, DE
• Joerg-Peter Geisler · Ingelheim am Rhein, DE
• Claus Godau · Kiedrich, DE
• Michael Hoenel · Wiesbaden, DE
• Bernhard Stengel-Rutkowski · Wiesbaden, DE

Key dates

• Filing date: Feb 7, 1994
• Grant date: Jul 23, 1996
• Expiry date: Feb 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L71/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Curing agents for aqueous epoxy resin dispersions obtained by reaction of an adduct (A) of at least one polyepoxide (A.sub.1) and at least one polyalkylene polyether polyol (A.sub.2), it being possible for the adduct (A) to be modified with a secondary amine (A.sub.3) if appropriate, with I. a reaction product of an amine (B) and an epoxide (C) or II. an amine (B) and subsequent reaction with an epoxide (C), the amount of amine (B) being chosen such that the H atoms on the nitrogen are present in a 2- to 10-fold excess, based on the epoxide groups in (A).