Composition comprising anti-bridging agent

Abstract

The present invention provides powder coating compositions comprising at least one resin, at least one anti-bridging agent, and at least 40% w/w of pigment.

1 . Powder coating comprising: 
 a. at least one resin;    b. at least one crosslinker;    c. at least one anti-bridging agent;    d. at least 40% w/w of pigment; wherein    the coating has an average thickness of 60 μm or less.    
   
   
       2 . Composition according to  claim 1  comprising at least 50% w/w of pigment.  
   
   
       3 . Coating according to  claim 1  wherein the coating has a thickness of from 20 μm to 60 μm.  
   
   
       4 . Powder coating composition comprising: 
 a. at least one resin;    b. at least one anti-bridging agent;    c. at least 40% w/w of pigment; wherein    the coating has a long wave roughness of 0.8 μm or less.    
   
   
       5 . Composition according to  claim 4  wherein the gloss at 20° is 60 or better.  
   
   
       6 . Composition according to  claim 4  wherein the haze is 250 or less.  
   
   
       7 . Powder paint composition comprising: 
 a. at least one resin;    b. at least one anti-bridging agent;    c. at least 40% w/w of pigment; wherein    the composition has a stable viscosity at a temperature of 200° C.    
   
   
       8 . Composition according to  claim 7  wherein the anti-bridging agent contains at least one reactive groups selected from phosphoric acid, sulphuric acid, sulphonic acid, boronic acid, maleic anhydrides, and combinations thereof.  
   
   
       9 . A powder coating comprising an anti-bridging agent having an average thickness of 80 μm or less.  
   
   
       10 . A powder paint composition comprising an anti-bridging agent.