Coating material with biocide microcapsules

• US 20040234603A1
• Filed: 03/15/2004
• Published: 11/25/2004
• Est. Priority Date: 06/19/2002
• Status: Active Grant

• Current Assignee: Thor GmbH (TATO Holdings Limited)
• Original Assignee: Thor GmbH (TATO Holdings Limited)
• Inventors: Zimmermann, Dagmar Antoni, Baum, Rudiger, Schmidt, Hans-Jurgen, Wunder, Thomas
• Granted Patent: US 7,429,392 B2
• Time in Patent Office: Days
• US Class Current: 424/486
• CPC Class Codes: A01N 25/28 Microcapsules or nanocapsules
• CPC Class Codes: C04B 14/047 Zeolites
• CPC Class Codes: C04B 14/12 Expanded clay
• CPC Class Codes: C04B 14/301 porous or hollow
• CPC Class Codes: C04B 20/1018 with organic materials pigments or dyes C04B20/1096
• CPC Class Codes: C04B 2103/67 Biocides
• CPC Class Codes: C04B 2111/00112 Mixtures characterised by specific pH values
• CPC Class Codes: C04B 2111/00482 Coating or impregnation materials
• CPC Class Codes: C04B 2111/2092 Resistance against biological degradation
• CPC Class Codes: C09D 5/14 Paints containing biocides, e.g. fungicides, insecticides or pesticides C09D5/16 takes precedence
• CPC Class Codes: C09D 5/1606 characterised by the anti-fouling agent

Abstract

The invention relates to a coating material for protection against microorganisum invasion on surfaces which are exposed to the effects of damp or water. The coating material has either a pH-value of at least 11.0 or is provided with a base material for the coating whereby the pH-value is at least 11.0. The coating material is characterised in that it contains a biocide which bonds to solid particles in a carrier material and is released in a delayed manner therefrom.

Claims

1. A coating material for protection against microorganism infestation on surfaces exposed to the effects of damp or water, said coating material either itself having a pH of at least 11.0 or being intended for the coating of a substrate material whose pH is at least 11.0, characterized in that the coating material comprises a biocide which is bound in a carrier material composed of particulate solids and is released retardedly therefrom.

2. The coating material of claim 1, characterized in that it is a silicate-bound or mineral plaster having a pH of at least 11.

3. The coating material of claim 1, characterized in that it is a synthetic-resin-bound or silicone-resin-bound plaster having a pH of below 11.

4. The coating material of claim 1, characterized in that it is a silicate-bound paint having a pH of at least 11.

5. The coating material of claim 1, characterized in that it is a synthetic-resin-bound or silicone-resin-bound paint having a pH of below 11.

6. The coating material of one of the above claims, characterized in that the biocide is a fungicide, an algaecide or a combination of the two.

7. The coating material of claim 6, characterized in that the biocide is zinc pyrithione, 4,5-dichloro-2-octylisothiazolin-3-one, 3-iodo-2-propynyl N-butylcarbamate, 2-n-octylisothiazolin-3-one, methyl 1H-benzimidazol-2-ylcar-bamate or N²-t-butyl-N⁴-ethyl-6-methylthio-1,3,5-triazine-2,4-diyldiamine or a mixture of two or more of these compounds.

8. The coating material of one of claims 1 to 7, characterized in that the particulate solids of the carrier material are granular particles having cavities.

9. The coating material of claim 8, characterized in that the granular particles having cavities are microcapsules.

10. The coating material of claim 9, characterized in that the wall material of the microcapsules is composed primarily of a formaldehyde-melamine resin.

11. The coating material of claim 8, characterized in that the granular particles with cavities are composed of a foamed ceramic material or a zeolite.

12. The use of the coating material of one of claims 1 to 11 for coating the walls of buildings.