Aqueous dispersions containing a synergistic dispersant combination

US5266622A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jan Mazanek · Cologne, DE
• Ulrich von Gizycki · Leverkusen, DE
• Gunter Link · Kaiserslautern, DE

Key dates

• Filing date: Nov 2, 1992
• Grant date: Nov 30, 1993
• Expiry date: Nov 2, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D17/001
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous dispersions of fillers and/or pigments contain a dispersant combination of the following composition: PA0 A) 40 to 95 by weight of a water-soluble polymer, PA0 B) 0 to 60 by weight of a non-ionic alkylene oxide adduct having an average molecular weight of 200 to 100,000, PA0 C) 0 to 60% by weight of compounds of the formulae (I), (II) and/or (III) ##STR1## in which R.sub.1 represents an optionally substituted aliphatic, aromatic or araliphatic radical having 1 to 50 C atoms, PA0 z in each case independently of one another represents an integer from 1 to 10 and PA0 x represents hydrogen, a monovalent metal ion or an optionally substituted ammonium ion and PA0 D) 0 to 60% by weight of a compound of the formula (IV) ##STR2## in which Q represents hydrogen, ##STR3## in which Y in each case independently of one another represents hydrogen, a monovalent metal ion or an optionally substituted ammonium ion, PA0 R.sub.2 in each case independently of one another represents hydrogen, an optionally substituted alkyl radical having 1 to 12 C atoms or a radical of the type --CH.sub.2 --COOR.sub.3 or --CH.sub.2 CH.sub.2 COOR.sub.3 and PA0 R.sub.3 in each case independently of one another …