The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2010
Filed:
Jul. 05, 2005
Gabriele Perlet, Grosskrotzenburg, DE;
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-sohn, Hanau-Mittelbuchen, DE;
Werner Will, Gelnhausen, DE;
Sascha Reitz, Bruchkoebel, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-Sohn, Hanau-Mittelbuchen, DE;
Werner Will, Gelnhausen, DE;
Sascha Reitz, Bruchkoebel, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
An aqueous dispersion that can be used in the coating of glass, ceramics and metal surfaces is prepared by placing, in water, an aggregated titanium dioxide powder having a specific surface area of from 20 to 150 m/g in such an amount that the desired dispersion contains at least 20 wt. % titanium dioxide, and at least one amino alcohol having from 1 to 6 carbon atoms, and at least one carboxylic acid selected from dibasic carboxylic acids and/or hydroxycarboxylic acids having from 2 to 6 carbon atoms. A pre-dispersion is produced by introducing energy in an amount of less than 200 kJ/m. Then a dispersion is produced in which the aggregated titanium dioxide powder has a mean, volume-related aggregate diameter of less than 150 nm by grinding the pre-dispersion with a high-energy mill at a pressure of at least 500 bar.