Aqueous aminoplastic resin dispersions

US4405751A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hanns P. Muller · Leverkusen, DE
• Kuno Wagner · Leverkusen, DE
• Peter Mummenhoff · Cologne, DE
• Gottfried Wallpott · Neuss, DE
• Karlheinz Scheuss · Krefeld, DE

Key dates

• Filing date: Mar 8, 1982
• Grant date: Sep 20, 1983
• Expiry date: Mar 8, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31964
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aminoplastic resin dispersions which are stable to sedimentation are obtained by condensation of aldehydes with aminoplastic resin formers in an aqueous medium, in the presence of water-soluble compounds of the formula EQU R--X--(A--O).sub.m --B--NHCONH--Y].sub.n having the substituent meanings mentioned in the description. The condensation is preferably carried out in the presence of dyestuffs or optical brighteners which have groups capable of condensation. The dispersions obtained thereby are particularly suitable for whitening the coating compositions used in the paper industry, and for coating paper, wood, films and textile materials.