Method for improving the corrosion resistance and lightfastness of painted aluminum oxide layers

US8057858B2 · kind B2 · utility

Assignee

• Clariant Finance (BVI) Limited · VG

Inventors

• Andreas Dierdorf · Frankfurt, DE
• Stefan Brand · Leutershausen, DE
• Hubert Liebe · Wiesbaden, DE
• Frank Osterod · Liederbach, DE
• Oliver Eich · Basel, CH
• Mark A. Jozefowicz · Kingston, CA

Key dates

• Filing date: Oct 13, 2006
• Grant date: Nov 15, 2011
• Expiry date: May 18, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D183/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for producing corrosion-resistant, painted oxide layers on aluminum or aluminum alloys. According to the method, a polysilazane solution is applied to a dry oxide layer that is painted with a water-soluble, anionic color, and the coating is then hardened at a temperature ranging from 40 to 150° C.