Preparation of aqueous dispersions of condensates of urea and CH-acidic aldehydes, and production of surface coating binders

US4663379A · kind A · utility

Assignee

• BASF SE

Inventors

• Kurt F. Fischer · Leonard, US
• Harro Petersen · Bischofswerda, DE
• Werner Loch · Erpolzheim, DE
• Hellmuth Kasch · Ludwigshafen, DE
• Eckehardt Wistuba · Bad Dürkheim, DE

Key dates

• Filing date: Feb 22, 1985
• Grant date: May 5, 1987
• Expiry date: Feb 22, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2361/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of stable aqueous aldehyde resin dispersions and for the production of surface coating binders. For this purpose, a melt or highly concentrated solution of a polycondensate of urea and a CH-acidic aldehyde, with or without formaldehyde, is dispersed in water in the presence of an organic protective colloid and, if required, an emulsifier. These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.