Damage-tolerant coating

Abstract

A coating composition having excellent damage tolerance. The coating composition includes a binder system comprising at least a fluoropolymer, optionally, one or more other resin components, a crosslinking component and at least one inorganic filler and organic filler. Coated articles with the coating composition applied to at least a portion of a surface thereof are also provide.

What is claimed is: 
     
         1 . A coated article, comprising
 a substrate;   a coating disposed on thereon, the coating derived from a composition comprising:
 a binder component comprising at least a fluoropolymer; 
 an organic filler material having a particle size of no more than about 15 μm; and 
 an inorganic filler material having a particle size of no more than about 15 μm 
   wherein the coated article demonstrates increased damage tolerance relative to an article coated with a conventional coil coating composition, and   wherein the coated article demonstrates a smooth appearance.   
     
     
         2 . The coated article of  claim 1 , wherein the fluoropolymer comprises about 50 to 70% by weight of the resin component, based on the total weight of the composition. 
     
     
         3 . The coated article of  claim 1 , wherein the fluoropolymer comprises up to about 70% by weight polyvinylidene difluoride (PVDF). 
     
     
         4 . The coated article of  claim 1 , wherein the resin component further comprises a polymer derived from one or more ethylenically unsaturated monomers. 
     
     
         5 . The article of  claim 1 , wherein the coating comprises 0.5 to 7 phr of the organic filler of finished film weight. 
     
     
         6 . The article of  claim 1 , wherein the organic filler is a high molecular weight, high melting polyolefin material. 
     
     
         7 . The article of  claim 1 , wherein the organic filler is a polyethylene. 
     
     
         8 . The article of  claim 7 , wherein the polyolefin material is polytetrafluoroethylene (PTFE). 
     
     
         9 . The article of  claim 1 , wherein the organic filler material has particle size of about 7 to 12 μm. 
     
     
         10 . The article of  claim 1 , wherein the inorganic filler material is silica. 
     
     
         11 . The article of  claim 1 , wherein the inorganic filler material is untreated amorphous synthetic silica. 
     
     
         12 . The article of  claim 1 , wherein the inorganic filler material has particle size of about 10 to 14 μm. 
     
     
         13 . The article of  claim 1 , further comprising at least one colored pigment. 
     
     
         14 . A coating composition comprising:
 a resin component including at least one fluoropolymer;   an organic filler material having a particle size of no more than about 15 μm; and   an inorganic filler material having a particle size of no more than about 15 μm.   
     
     
         15 . A method of making a damage-tolerant coating, comprising:
 providing a substrate;   providing a coating composition, the composition comprising:
 a resin component including at least one fluoropolymer; 
 an organic filler material having a particle size of no more than about 15 μm; and 
 an in 15 μm 
 of no more than about 15 μm; 
   applying the coating composition on the substrate; and   curing the applied composition to produce a damage-tolerant coating.   
     
     
         16 . The method of  claim 15 , wherein the substrate is a planar metal substrate.