Curable film-forming compositions comprising catalyst associated with a carrier and methods for coating a substrate

Abstract

Coating compositions comprising a film-forming resin and catalyst associated with a carrier, wherein at least some of the catalyst can be released from the carrier upon application of shear force is disclosed. Methods of coating a substrate and substrates coated at least in part with such coatings are also disclosed

1 . A coating composition comprising:
 (a) a film-forming resin; and   (b) a catalyst associated with a collier, wherein at least some of the catalyst, upon application of shear force, can be released from the carrier, and wherein the carrier is not formed from the film-forming resin (a).   
     
     
         2 . The composition of  claim 1 , wherein the film-forming resin comprises a waterborne composition. 
     
     
         3 . The composition of  claim 1 , wherein the catalyst is contained within or encapsulated by the Carrier. 
     
     
         4 . The composition of  claim 1 , wherein the carrier comprises:
 a crosslinked polymer and/or copolymer.   
     
     
         5 . The composition of  claim 1 , wherein the carrier comprises:
 (a) gelatin, or   (b) polyoxymethylene urea formaldehyde.   
     
     
         6 . The composition of  claim 1 , wherein the catalyst comprises catalysts comprising metal salts, or organometallic catalysts. 
     
     
         7 . The composition of  claim 1 , wherein the catalyst comprises dibutyltin dilaurate. 
     
     
         8 . The composition of  claim 1 , wherein the catalyst comprises 40-90 wt % of total solid content of the catalyst and carrier. 
     
     
         9 . The composition of  claim 1 , wherein the shear force is imparted by an atomizer or a spray gun. 
     
     
         10 . The composition of  claim 1 , wherein the coating composition further comprises a crosslinker. 
     
     
         11 . A substrate coated at least in part with the coating compo on recited in  claim 1 . 
     
     
         12 . The substrate of  claim 11 , wherein the substrate is part of a vehicle. 
     
     
         13 . A method of coating a substrate comprising:
 applying the coating composition of  claim 1  to at least a portion of the substrate, wherein said applying is conducted to impart shear force to the carrier to release the catalyst from the carrier.   
     
     
         14 . The method of  claim 13 , wherein increasing the shear force applied to the carrier increases the amount of catalyst that is released. 
     
     
         15 . The method of  claim 13 , wherein the shear force is induced by an atomizer or spray gun. 
     
     
         16 . A method of coating a substrate comprising:
 applying shear force to the coating composition of  claim 1 , and   subsequently applying the coating composition to at least a portion of the substrate.   
     
     
         17 . The method of  claim 16 , wherein the substrate is part of a vehicle.