Coating material with biocide microcapsules

• US 7,429,392 B2
• Filed: 06/19/2002
• Issued: 09/30/2008
• Est. Priority Date: 06/19/2002
• Status: Expired due to Fees

• Current Assignee: Thor GmbH (TATO Holdings Limited)
• Original Assignee: Thor GmbH (TATO Holdings Limited)
• Inventors: Baum, Rudiger, Schmidt, Hans-Jurgen, Wunder, Thomas, Antoni-Zimmermann, Dagmar
• Primary Examiner(s): Kennedy; Sharon E.
• Application Number:
  US10/489,842
• Publication Number:
  US 20040234603A1
• Time in Patent Office: 2,295 Days
• Field of Search: 424/405, 424/406, 424/407, 424/409, 424/421, 424/682, 424/724, 514/372
• US Class Current: 424/405
• 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 microorganism 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 provide with a base material for the coating whereby the pH-value is at least 11. The coating material is characterized 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 having a pH of at least 11.0 comprising a biocide which is bound in a carrier material composed of particulate solids of a wall material containing a formaldehyde-melamine resin which protects the biocide from being decomposed in a strongly alkaline environment having a pH of at least 11.0 which is released retardedly therefrom and wherein the biocide is a zinc pyrithione, 4,5-dichloro-2-octylisothiazolin-3-one, 3-iodo-2-propynyl N-butylcarbamate, 2-n-octylisothiazolin-3-one, methyl 1H-benzimidazol-2-ylcarbamate, or N²-t-butyl-N⁴-ethyl-6-methylthio-1,3,5-triazine-2,4-iyldiamine or a mixture of two or more of these compounds.

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

3. The coating material of claim 1, characterized in that the coating prior to application is a synthetic-resin-bound or silicone-resin-bound plaster having a pH of below 11, wherein said plaster is applied to a strongly alkaline substrate, whereafter alkaline compounds gradually penetrate from the substrate material into the coating containing the biocide bound in the carrier material.

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

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

6. The coating material of one of claim 1, characterized in that the particulate solids of the carrier material are granular particles having cavities.

7. The coating material of claim 6, characterized in that the granular particles having cavities are microcapsules.

8. The coating material of claim 7, characterized in that the wall material of the microcapsules is composed primarily of a formaldehyde-melamine resin.

9. The coating material of claim 6, characterized in that the granular particles with cavities are composed of a foamed ceramic material or a zeolite.