Preparation of a binder suitable for coating agents

US4623679A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Gimpel · Ludwigshafen, DE
• Erich Gulbins · Heidelberg, DE
• Gregor Ley · Wattenheim, DE

Key dates

• Filing date: Jun 13, 1985
• Grant date: Nov 18, 1986
• Expiry date: Jun 13, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G8/38
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A binder which is suitable for coating agents and is based on a combination which is essentially free of protective colloids and consists of an aqueous primary dispersion of a synthetic polymer and a water-insoluble polycondensate of phenols and aldehydes, some of which may be replaced by ketones, is prepared by a process in which the phenolic components for the polycondensate are first mixed with an aqueous primary dispersion of a synthetic polymer which contains glycidyl, carbonyl, N-methylol, N-alkoxymethyl, ether, amino and/or hydrazo groups and may furthermore contain carboxyl or hydroxyl groups, and the polycondensation with the aldehydes (and ketones) is then carried out in this mixture, under conventional conditions. The binders prepared according to the invention are useful as binders for dispersion paints and coatings, in particular as heat-curable binders for metal finishes.