Aluminium oxide dispersion

US8562733B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Wolfgang Lortz · Wächtersbach, DE
• Christoph Batz-Sohn · Hanau, DE
• Gabriele Perlet · Großkrotzenburg, DE
• Heinz Lach · Rodenbach, DE
• Werner Will · Gelnhausen, DE

Key dates

• Filing date: Jun 9, 2006
• Grant date: Oct 22, 2013
• Expiry date: Sep 30, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Aluminum oxide dispersion, which is stable in a pH range 5 from 5 to 9 and has an aluminum oxide content of at least 40 wt. %, obtainable by dispersing pyrogenically produced aluminum oxide particles in an aqueous phase, wherein one or several at least dibasic hydroxycarboxylic acids present dissolved in the dispersion and at least one salt of a 10 dialkali metal hydrogen phosphate and/or alkali metal dihydrogen phosphate are added to the aqueous phase each mutually independently in a quantity of 0.3−3×10−6 mol/m2 of aluminum oxide specific surface area.