Binders based on co-condensates of epoxy resins and resols with amines a process for their preparation and for electrophoretic deposition, and an electrophoresis bath

US4481311A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Hesse · Breckenheim, DE
• Jurgen Ritz
• Rolf Zimmermann · Maßweiler, DE

Key dates

• Filing date: Aug 31, 1982
• Grant date: Nov 6, 1984
• Expiry date: Aug 31, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L63/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Binders based on co-condensates of epoxy resins and resols with amines, the epoxy resin being partially defunctionalized and still containing on average 0.5-1.3 epoxide groups per molecular unit, the resol component being composed of methylol compounds of oligomethylene compounds, which are additionally substituted by hydrocarbon or hydroxyalkyl or hydroxyaralkyl radicals, and the amine containing at least one primary or secondary amino group and at most 2 hydroxyl groups. The invention further relates to a process for the preparation of a binder and for the electrophoretic deposition of a cationic resin from an aqueous dispersion onto an article connected as the cathode and to an aqueous electrophoresis bath for carrying out this process.