Production of aqueous suspensions of finely divided titanium dioxide

US4474681A · kind A · utility

Assignee

• BASF SE

Inventors

• Horst Belde · Ludwigshafen, DE
• Hans Langenfelder · Mannheim, DE
• Werner Hoerauf · Ludwigshafen, DE

Key dates

• Filing date: Jul 2, 1982
• Grant date: Oct 2, 1984
• Expiry date: Jul 2, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/928
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Aqueous suspensions of finely divided titanium dioxide are produced in the presence of dispersants by a process in which titanium dioxide powder and caprolactam are kneaded together in the dry state at from 15.degree. to 40.degree. C., the resulting mixture is kneaded with the addition of water, the paste thus obtained is suspended in water, the suspension is then allowed to sediment, and the resulting suspension containing finely divided titanium dioxide is decanted.