Surface-modified zinc oxide for the production of nanoparticulate dispersions

US7348029B2 · kind B2 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Rainer Kliss · Reinheim, DE
• Ralf Elsässer · Augsburg, DE
• Melita Heller · Mülheim an der Ruhr, DE
• Christian Umbreit · Neuss, DE
• Horst Hahn · Champaign, US
• Christian Kropf · Hilden, DE
• Mete Berber · Ober-Ramstadt, DE
• Victor Bulto Carulla · Barcelona, ES

Key dates

• Filing date: Jun 21, 2004
• Grant date: Mar 25, 2008
• Expiry date: Mar 21, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/64
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to a surface-modified nanoscale zinc oxide, where the surface modification involves coating with an oligo- or polyethylene glycol acid. This surface-modified zinc oxide is characterized in that it forms stable dispersions in a liquid medium. In addition, the present invention relates to a process for the production of surface-modified zinc oxide, and also to a process for the production of nanoscale zinc oxide dispersions.