Self-cleaning paint coating and a method and agent for producing the same

US7544411B2 · 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: Dec 21, 2001
• Grant date: Jun 9, 2009
• Expiry date: Nov 25, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A self-cleaning paint coating that exhibits the LOTUS EFFECT and an agent and a method for producing the same. The paint coating comprises a paint base coat and a topcoat. The topcoat includes structure-forming particles and is at least partially hydrophobic. The structure-forming particles have an average particle diameter of less than 100 nanometers (nm) and form elevations in the topcoat surface that are interspaced at a distance of less than 50 nm. The topcoat of the paint coating is formed from the agent. The agent contains a liquid medium, a hydrophobating agent dissolved in the liquid medium, and structure-forming particles suspended in the medium. The method of forming the paint coating comprises coating a substrate with the base coat, applying the topcoat agent to the partially cured or uncured base coat, and curing of the top coat, and if required, the base coat.