Aqueous pigment and/or filler dispersions containing a special combination of dispersing agents

US6239201A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dirk Edelmann · Wuppertal, DE
• Gunter Link · Kaiserslautern, DE
• Jan Mazanek · Cologne, DE

Key dates

• Filing date: Mar 15, 1999
• Grant date: May 29, 2001
• Expiry date: Mar 15, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/45
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to an aqueous dispersion containing a pigment and/or a filler and, as dispersing agent, PA1 A) 50 to 90 wt. % of a non-ionic alkylene oxide adduct having a number average molecular weight of 2000 to 100,000, PA1 B) 0 to 40 wt. % of a salt of a polycarboxyl compound, PA1 C) 5 to 40 wt. % of a salt of an acidic (poly)phosphate ester and PA1 D) 0 to 60 wt. % of a water-soluble or water-dispersible polyurethane oligomer, wherein the sum of the components A)+B)+C)+D) equals 100 wt. %, based on the weight of A), B), C) and D), and the amount of at least one of components B) or D) is not 0.