Platelet-shaped titanium dioxide pigment

US5858078A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Stefanie Andes · Maintal, DE
• Gerd Bauer · Kleinostheim, DE
• Gunter Brenner · Griesheim, DE
• Dieter Bruckner · Darmstadt, DE
• Andrea Heyland · Ober-Kainsbach, DE
• Matthias Kuntz · Seeheim-Jugenheim, DE
• Karl Osterried · Dieburg, DE
• Gerhard Pfaff · Mainburg, DE
• Michael Schmelz · Griesheim, DE

Key dates

• Filing date: Jan 9, 1998
• Grant date: Jan 12, 1999
• Expiry date: Jan 9, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/20
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Plateletlike, substrate-free titanium dioxide pigment obtainable by solidifying an aqueous solution of a thermally hydrolyzable titanium compound on a continuous belt, detaching the resulting layer, coating the resulting titanium dioxide platelets, with or without drying in between, with further titanium dioxide by a wet method, and separating off, drying and calcining the material obtained.