# US 8,771,830 B2 · Hydrophobic coating and process for production thereof

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- Number: US 8,771,830 B2
- Document ID: US8771830B2
- Status: Granted
- Kind: B2
- Application number: 12/995,586
- Filed: 2009-05-19
- Published: 2011-05-12
- Granted: 2014-07-08
- Earliest claimed: 2008-06-05
- Assignees: Fachhochschule Kiel
- Applicants: Mohammed Es-Souni
- Inventors: Mohammed Es-Souni
- Web page: https://patentgrep.com/patent/US8771830B2

## CPC

- C09D 1/00: Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- A61L 27/06: Titanium or titanium alloys
- A61L 27/306: {Other specific inorganic materials not covered by A61L27/303 - A61L27/32}
- Y10T 428/265: 1 mil or less
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Substrate having a silver-ion containing titanium oxide coating having a silver content of greater than or equal to 0.2 of Ag/l of Ti to less than or equal to 0.4 of Ag/l of Ti, wherein the coating is X-ray amorphous and the hydrophobicity of the coating can be reduced persistently by illumination.

## Claims

### Claim 1

A substrate comprising a silver-ion-containing titanium oxide coating having a silver content in a molar ratio of greater than or equal to 0.2 of Ag/l of Ti to less than or equal to 0.4 of Ag/l of Ti, wherein the silver-ion-containing titanium oxide coating is completely X-ray amorphous and composed so that the hydrophobicity of the silver-ion-containing titanium oxide coating is persistently reduced by illumination.

### Claim 2 (depends on 1)

The substrate according to claim 1, characterized in that the hydrophobicity of the coating can be reduced persistently by illumination using a wavelength of 250 nm to 400 nm.

### Claim 3 (depends on 1)

The substrate according to claim 1, characterized in that the coating was cured at a temperature equal or less than 200° C.

### Claim 4 (depends on 1)

The substrate according to claim 1, characterized in that the coating has a thickness of 300 to 500 nm.