Fluid pigment suspensions with phosphonocarboxylic acids

US4186028A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Woditsch · Krefeld, DE
• Gunther Teichmann · Krefeld, DE
• Gunter Linde · Krefeld, DE
• Gunter Lailach · Krefeld, DE
• Fritz Rodi · Moers, DE

Key dates

• Filing date: May 30, 1978
• Grant date: Jan 29, 1980
• Expiry date: May 30, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In an aqueous fluid dispersible filler or pigment suspension containing a dispersion aid, the improvement which comprises employing as the dispersion aid about 0.01 to 1% by weight, based on solids, of a phosphonocarboxylic acid or a salt thereof. The pigment may be TiO.sub.2 and be present in from 30 to 80% concentration. The dispersion aid may be phosphonobutane-1, 2,4-tricarboxylic acid or a salt, and an amine or alkanolamine may also be present.