Glass ceramic and metal substrates with a self-cleaning surface, method for the production and use thereof

US6872441B2 · kind B2 · utility

Assignee

• Ferro Corporation · US

Inventors

• Martin Baumann · Hartenstein, DE
• Klaus-Dieter Fritsche · Leisnig, DE
• Dagmar Korbelarz · Hanau, DE
• Stephan Ludwig · Kohlenbissen, DE
• Lutz Poth · Roßdorf, DE

Key dates

• Filing date: Mar 13, 2001
• Grant date: Mar 29, 2005
• Expiry date: May 14, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to glass, ceramic and metal substrates with at least one self-cleaning surface, comprising a layer with a micro-rough surface structure which is arranged on the substrate and made at least partly hydrophobic. The layer contains a glass flux and structure-forming particles with a mean particle diameter within the 0.1 to 50 μm range; the glass flux and structure-forming particles are present in a volume ratio within the 0.1 to 5 range, and the micro-rough surface structure has a ratio of mean profile height to mean distance between adjacent profile tips within the 0.3 to 10 range.To produce the subject of the invention the substrate is coated with a composition containing a glass flux and structure-forming particles, and the layer is burnt in and made hydrophobic.