Plate-like titanium dioxide reduction pigment

US5985020A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Stefanie Andes · Maintal, DE
• Sabine Hock · Schaafheim, 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: Nov 16, 1999
• Expiry date: Jan 9, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Plateletlike titanium dioxide reduction pigment consisting of titanium dioxide, titanium suboxides and, if desired, a further metal oxide or titanium oxynitride, obtainable by solidifying an aqueous solution of a thermally hydrolysable titanium compound on a continuous belt, detaching the resulting coat, coating the resulting titanium dioxide platelets, with or without drying in between, with further titanium dioxide by a wet method, drying and, if desired, calcining the material, and treating the material obtained with a reducing agent in a nonoxidizing gas atmosphere.