Curing catalysts for curing epoxy resins

US6040396A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Joseph Gan · Strasbourg, FR
• Gabriele BADINI · Sasbachwalden, DE
• Klaus Hoffmann · Essen, DE

Key dates

• Filing date: Jul 22, 1997
• Grant date: Mar 21, 2000
• Expiry date: Jul 22, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/56
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A formulation which contains: PA1 (1) the nucleophilic addition adduct of an imidazole and an unsaturated compound, which contains more than one imidazole moiety per molecule; and PA1 (2) an epoxy resin, is characterized in that fewer than 50 equivalent percent of the imidazole moieties in the adduct are neutralized with acid. The adduct may serve as a curing catalyst in high or low-temperature curing. The formulation is made and applied as a powder coating for coatings or as a matrix resin in laminates. It may be used in solvent-borne or liquid systems.