Aluminium oxide-containing dispersion

US7834076B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Wolfgang Lortz · Wächtersbach, DE
• Gabriele Perlet · Großkrotzenburg, DE
• Werner Will · Gelnhausen, DE
• Sascha Reitz · Hanau, DE

Key dates

• Filing date: Jan 26, 2007
• Grant date: Nov 16, 2010
• Expiry date: Jan 26, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/22
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A dispersion containing aluminum oxide of pyrogenic origin and water, where the aluminum oxide is present in the form of aggregated primary particles with a BET surface area of 20 to 200 m2/g and has a mean, volume-based aggregate diameter in the dispersion of less than 100 nm, and is surface-modified with (i) organophosphonic acids, or salts thereof, and (ii) at least one hydroxycarboxylic acids or salts thereof.