Abrasive article having reaction activated chromophore

Abstract

An abrasive article has a layer including an epoxy constituent, a cationic photointiator within the epoxy constituent, and a latent colorant configured to change color in response to activation of the cationic photoinitiator.

1 . An abrasive article having a layer comprising: 
 an epoxy constituent;    a cationic photointiator within the epoxy constituent; and    a latent colorant configured to change color in response to activation of the cationic photoinitiator.    
   
   
       2 . The abrasive article of  claim 1 , further comprising an acrylic constituent and a radical generating photoinitiator.  
   
   
       3 . The abrasive article of  claim 2 , wherein the layer comprises about 0.1 wt % to about 60 wt % of the acrylic constituent.  
   
   
       4 - 7 . (canceled)  
   
   
       8 . The abrasive article of  claim 2 , further comprising a second latent colorant configured to change color in response to activation of the cationic photoinitiator.  
   
   
       9 - 10 . (canceled)  
   
   
       11 . The abrasive article of  claim 1 , wherein the layer comprises about 10 wt % to about 90 wt % of the epoxy constituent.  
   
   
       12 - 15 . (canceled)  
   
   
       16 . The abrasive article of  claim 1 , wherein latent colorant exhibits a specific color based on curing of the epoxy constituent.  
   
   
       17 . (canceled)  
   
   
       18 . An abrasive article comprising: 
 a polymer matrix;    a reaction activated chromophore within the polymer matrix; and    particulate abrasive grains.    
   
   
       19 . The abrasive article of  claim 18 , wherein the reaction activated chromophore is formed from a latent colorant and a curing byproduct.  
   
   
       20 . The abrasive article of  claim 19 , wherein the latent colorant is selected from the group consisting of a triaryl methane-based color former, a diphenyl methane-based color former, a thiazine-based color former, a spiro-based color former, a lactam-based color former, a fluoran-based color former, an isobenzofuranone-based color former, and any combination thereof.  
   
   
       21 . The abrasive article of  claim 18 , wherein the polymer matrix is free of particulate pigment.  
   
   
       22 . The abrasive article of  claim 18 , wherein the reaction activated chromophore comprises an organic chromophore.  
   
   
       23 . The abrasive article of  claim 18 , wherein the polymer matrix comprises a polymerized cationically polymerizable constituent.  
   
   
       24 - 30 . (canceled)  
   
   
       31 . The abrasive article of  claim 18 , wherein the polymer matrix comprises a polymerized radically polymerizable constituent.  
   
   
       32 - 37 . (canceled)  
   
   
       38 . The abrasive article of  claim 18 , wherein the particulate abrasive grains are selected from the group consisting of silica, alumina, zirconia, silicon carbide, silicon nitride, boron nitride, garnet, diamond, cofused alumina zirconia, ceria, titanium diboride, boron carbide, flint, emery, alumina nitride, and any combination thereof.  
   
   
       39 . The abrasive article of  claim 38 , wherein the particulate abrasive grains have a median grain size between 0.1 microns to 1500 microns.  
   
   
       40 - 41 . (canceled)  
   
   
       42 . The abrasive article of  claim 18 , wherein the abrasive article is a coated abrasive article.  
   
   
       43 - 44 . (canceled)  
   
   
       45 . The abrasive article of  claim 42 , wherein the coated abrasive article is an engineered abrasive article.  
   
   
       46 . The abrasive article of  claim 18 , wherein the abrasive article is a bonded abrasive article.  
   
   
       47 . The abrasive article of  claim 18 , further comprising a second reaction activated chromophore.  
   
   
       48 . The abrasive article of  claim 47 , wherein the reaction activated chromophore has a first electromagnetic energy absorption profile and the second reaction activated chromophore has a second electromagnetic energy absorption profile.  
   
   
       49 - 50 . (canceled)  
   
   
       51 . The abrasive article of  claim 47 , wherein the reaction activated chromophore is activated based on a different reaction condition than the second reaction activated chromophore.  
   
   
       52 . An abrasive article comprising a reaction activated chromophore.  
   
   
       53 . The abrasive article of  claim 52 , wherein the reaction activated chromophore is formed from a latent colorant and a curing byproduct.  
   
   
       54 . (canceled)  
   
   
       55 . The abrasive article of  claim 52 , further comprising a polymer matrix comprising a polymerized cationically polymerizable constituent.  
   
   
       56 - 59 . (canceled)  
   
   
       60 . The abrasive article of  claim 52 , further comprising particulate abrasive grains.  
   
   
       61 - 94 . (canceled)