Compositions for producing difficult-to-wet surface

US6683126B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Harald Keller · Ludwigshafen, DE
• Ingolf Kühn · Schmerbach, DE
• Ekkehard Jahns · Weinheim, DE
• Christian Lach · Bad Dürkheim, DE
• Stephan Huffer · Birkenfeld, DE
• Thilo Krebs · Mannheim, DE
• Yi Thomann · Umkirch, DE
• Thomas Frechen · Heidelberg, DE

Key dates

• Filing date: Apr 25, 2001
• Grant date: Jan 27, 2004
• Expiry date: Aug 4, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/939
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a coating composition for producing difficult-to-wet surfaces, comprisingi) at least one finely divided powder whose particles have a hydrophobic surface and a porous structure characterized by a BET surface area (determined in accordance with DIN 66131) of at least 1 m2/g, andii) at least one film-forming binder characterized by a surface tension <50 mN/m, the weight ratio of powder to binder being at least 1:4.It also provides a process for producing difficult-to-wet surfaces, and provides for the use of the coating compositions for producing surfaces having a self-cleaning effect and for reducing the flow resistance for liquids in pipes.