Sprayable coating compostion

Abstract

The present invention relates to a sprayable coating composition comprising a) at least one isocyanate reactive compound comprising at least one thiol group, b) at least one polyisocyanate functional compound, and c) a catalyst comprising at least one organic metal compound where the metal is a metal of Groups 3 to 13 of the Periodic Table. The invention also relates to use of the sprayable coating composition as a clear coat, its use as a clear coat, its use as a clear coat in a multi-layer lacquer coating, and its use in the refinish industry and in finishing large transportation vehicles.

1 . Sprayable coating composition comprising 
 a) at least one isocyanate reactive compound comprising at least one thiol group,    b) at least one polyisocyanate-functional compound, and    c) a catalyst comprising at least one organic metal compound where the metal is a metal of Groups 3 to 13 of the Periodic Table.    
     
     
         2 . Sprayable coating composition according to  claim 1 , characterised in that the, metal is a transition metal.  
     
     
         3 . Sprayable coating composition according to  claim 2 , characterised in that the metal is a metal of Group 4 of the Periodic Table.  
     
     
         4 . Sprayable coating composition according to  claim 1 , characterised in that the metal is selected from the group of aluminium, titanium, zirconium, and hafnium compounds.  
     
     
         5 . Sprayable coating composition according to any one of the preceding claims, characterised in that the organic metal compound is a metal complex.  
     
     
         6 . Sprayable coating composition according to  claim 5 , characterised in that the metal complexes comprise ligands selected from the group of beta-diketones, alkyl acetoacetates, alcoholates, and combinations thereof.  
     
     
         7 . Sprayable coating composition according to any one of the preceding claims, characterised in that a ketone based chelating agent is added to the coating composition.  
     
     
         8 . Sprayable coating composition according to any one of the preceding claims, characterised in that at least 50% of the isocyanate reactive groups are thiol groups.  
     
     
         9 . Sprayable coating composition according to any one of the preceding claims, characterised in that the isocyanate reactive compound comprising at least one thiol group is derived from a polyester compound.  
     
     
         10 . Use of a coating composition according to any one of the preceding claims, comprising applying the composition as a clear coat.  
     
     
         11 . Use of a coating composition according to  claim 10 , comprising applying the composition as a clear coat in a multi-layer lacquer coating.  
     
     
         12 . Use of a coating composition according to any one of preceding  claims 1  to  9  in the refinish industry and in finishing large transportation vehicles.