Coating material with biocide microcapsules

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.

1 - 12 . (canceled) 
   
   
       13 . Biocide, bound in a carrier material composed of particulate solids, wherein the carrier material contains a formaldehyde-melamine resin and the biocide is zinc pyrithion, 4,5-dichloro-2-octylisothiazolin-3-one, 3-iodo-2-propynyl N-butylcarbamate, methyl 1H-benzimidazol-2-ylcarbamate, or N 2 -t-butyl-N 4 -ethyl-6-methylthio-1,3,5-triazin-2,4-diyldiamine or a mixture of two or more of these compounds. 
   
   
       14 . Biocide according to  claim 13 , wherein the particulate solids of the carrier material are granular particles having cavities. 
   
   
       15 . Biocide according to  claim 14 , wherein the granular particles having cavities are microcapsules. 
   
   
       16 . Biocide according to  claim 13 , wherein the wall material of the microcapsules is composed primarily of a formaldehyde-melamine resin. 
   
   
       17 . Biocide according to  claim 13 , wherein the particulate solids have a diameter of from 30 to 40 μm. 
   
   
       18 . A method of protecting a coating material against microorganism infestation comprising the step of incorporating a biocide according to claim  1  in said coating.