Colored abrasive articles and method of making colored abrasive articles

Abstract

Embodiments of the present disclosure are directed to methods of making high grade colored abrasive articles that are color stable at high temperatures, such as color stable at temperatures of at least about 185 degrees Celsius such that the bonded abrasive body can be cured at such elevated temperatures without substantially changing the color of the bonded abrasive body.

1 . A method of forming an abrasive article comprising a bonded abrasive body, the method comprising: forming a mixture comprising abrasive particles dispersed within a bond material; and curing the mixture at a temperature of at least 185° C. in a non-oxidizing atmosphere to form a bonded abrasive body. 
     
     
         2 . The method of  claim 1 , wherein the bond material includes a significant amount of methylene and dimethylene amino crosslink bridges. 
     
     
         3 . The method of  claim 1 , wherein the non-oxidizing atmosphere consists essentially of an inert gas. 
     
     
         4 . The method of  claim 1 , wherein the non-oxidizing atmosphere consists essentially of an inert gas comprising nitrogen. 
     
     
         5 . The method of  claim 1 , wherein the non-oxidizing atmosphere consists essentially of nitrogen. 
     
     
         6 . The method of  claim 1 , wherein the bond material is essentially free of an acrylate. 
     
     
         7 . A method of forming an abrasive article comprising a bonded abrasive body, the method comprising:
 forming a mixture comprising abrasive particles dispersed within a phenyl-formaldehyde based bond material; and   curing the mixture,   wherein the bonded abrasive body has substantially the same color before and after curing.   
     
     
         8 . The method of  claim 7 , wherein the bond material includes a significant amount of methylene and dimethylene amino crosslink bridges. 
     
     
         9 . The method of  claim 7 , wherein the non-oxidizing atmosphere consists essentially of an inert gas. 
     
     
         10 . The method of  claim 7 , wherein the non-oxidizing atmosphere consists essentially of an inert gas comprising nitrogen. 
     
     
         11 . The method of  claim 7 , wherein the non-oxidizing atmosphere consists essentially of nitrogen. 
     
     
         12 . The method of  claim 7 , wherein the bond material is essentially free of an acrylate. 
     
     
         13 . An abrasive article comprising:
 a bonded abrasive body comprising abrasive particles contained within a bond material, wherein the bond material has a glass transition temperature of at least about 200° C.; and wherein the bonded abrasive body is color stable.   
     
     
         14 . The abrasive article of  claim 13 , wherein the bond material is essentially free of an acrylate. 
     
     
         15 . The abrasive article of  claim 13 , wherein the bonded abrasive body has a bond material content of at least about 5 wt. % based on the total weight of the body. 
     
     
         16 . The abrasive article of  claim 13 , wherein the bond material comprises a cured and cross-linked reaction product of a first resin and a second resin distinct from the first resin. 
     
     
         17 . The abrasive article of  claim 13 , wherein the bonded abrasive body comprises a pigment. 
     
     
         18 . The abrasive article of  claim 13 , wherein the bonded abrasive body comprises an organic pigment. 
     
     
         19 . The abrasive article of  claim 13 , wherein the bonded abrasive body comprises a pigment having a thermal stability of at least about at least about 180° C. 
     
     
         20 . The abrasive article of  claim 13 , wherein the bond material has a color defined by the CIELAB color system of an L* in a range of from 20 to 80; AND an a* of greater than 20 or less than about −20 and a b* in a range of from about −256 to about 256; OR a b* of greater than about 20 or less than about −20 and an a* in a range of from about −256 to about 256.