Coating Composition, Coating and an Object Coated with the Coating Composition

Abstract

Coating composition comprising particles grafted with reactive groups and hydrophilic polymer chains. The hydrophilic polymer chains dissolves in water at least one temperature between 0 and 100° C. The reactive group may react with the substrate and or reacts to form a cross-linked coating, comprising the particles. The invention also relates to a coating obtained from the coating composition, an object coated with the coating and the particles.

1 . Coating composition comprising particles being grafted with reactive groups and hydrophilic polymer chains. 
   
   
       2 . Coating composition according to  claim 1 , wherein the particles are anorganic. 
   
   
       3 . Coating composition according to  claim 1 , wherein the average smallest diameter of the particles is below 10 micron. 
   
   
       4 . Coating composition according to  claim 1 , wherein the particles comprise SiO 2 , TiO 2 , ZnO 2 , TiO 2 , SnO 2 , Am—SnO 2 , ZrO 2 , Sb—SnO 2 , Al 2 O 3 . Au or Ag 
   
   
       5 . Coating composition according to  claim 1 , wherein the hydrophilic polymer chain comprise monomer units of ethylenoxide, (meth)acrylic acid, (meth)acrylamide, vinylpyrrolidone, 2-hydroxyethyl(meth)acrylate, phosphorylcholine, glycidyl(meth)acrylate or saccharides. 
   
   
       6 . Coating composition according to  claim 1 , wherein the coating composition comprises a compound that increases the adhesion of the coating to a substrate. 
   
   
       7 . Particles used in the coating composition according to  claim 1 . 
   
   
       8 . Coating obtainable from the coating composition according to  claim 1 . 
   
   
       9 . Coating according to  claim 8 , comprising one more species that diffuse out of the coating during usage. 
   
   
       10 . Process for producing the coating composition according  claim 1  comprising the step of chemically grafting a hydrophilic chain to a particle.