Self-cleaning surfaces comprising elevations formed by hydrophobic particles and having improved mechanical strength

US7846529B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Edwin Nun · Billerbeck, DE
• Markus Oles · Hattingen, DE

Key dates

• Filing date: Dec 21, 2005
• Grant date: Dec 7, 2010
• Expiry date: Jul 18, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24372
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to self-cleaning surfaces having improved mechanical stability and a process for the production thereof. The present invention is achieved by producing self-cleaning, hydrophobic, structured surfaces having mixtures of particles, which are fixed on their surface and which comprise structure-producing particles selected from semimetal or metal oxides, silicas and metal powders, and wax particles. Structured surfaces that are structured by such mixtures of particles are distinguished by substantially higher mechanical stability of the structure and are therefore especially suitable for the production of self-cleaning surfaces, which are exposed to relatively high mechanical loads, such as, for example, the surfaces of tarpaulins, awnings, greenhouse elements, conservatories or truck tarpaulins.