Method of finishing a stone surface and abrasive article

Abstract

A structured abrasive article comprises a structured abrasive layer adhered to a major surface of a backing, the structured abrasive layer comprising shaped abrasive composites adhered to the major surface, the shaped abrasive composites comprising milled polycrystalline ceramic abrasive particles retained in a polymeric binder, wherein the milled polycrystalline ceramic abrasive particles have a median particle size D 50 of from 3 to 30 microns. In a method of finishing a stone surface, the structured abrasive layer is frictionally contacting with the stone surface; and moved relative to the stone surface under conditions sufficient to finish the stone surface.

1 . A method of finishing a stone surface, the method comprising:
 providing a structured abrasive article comprising a structured abrasive layer adhered to a major surface of a backing, the structured abrasive layer comprising shaped abrasive composites adhered to the major surface, the shaped abrasive composites comprising milled polycrystalline ceramic abrasive particles retained in a polymeric binder, wherein the milled polycrystalline ceramic abrasive particles have a median particle size D 50  of from 3 to 30 microns and wherein the backing is secured to a lofty open nonwoven backup pad mounted on a rotary floor machine, wherein the rotary floor machine operates at a rotational speed of less than 250 rotations per minute;   frictionally contacting the structured abrasive layer with the stone surface; and   moving the structured abrasive layer relative to the stone surface under conditions sufficient to finish the stone surface.   
     
     
         2 . A method according to  claim 1 , wherein the structured abrasive layer has a bearing area ratio of from 40 percent to 70 percent. 
     
     
         3 . (canceled) 
     
     
         4 . A method according to  claim 1 , wherein the shaped abrasive composites comprise hexagonal posts. 
     
     
         5 . A method according to  claim 1 , wherein the milled polycrystalline ceramic abrasive particles have an average Vickers hardness of at least 21 gigapascals. 
     
     
         6 . A method according to  claim 1 , wherein the milled polycrystalline ceramic abrasive particles have an average fracture toughness of at least 3 megapascals per meter 0.5 . 
     
     
         7 . A method according to  claim 1 , wherein the stone surface comprises at least a portion of a floor. 
     
     
         8 . A method according to  claim 1 , wherein the stone surface comprises at least a portion of a counter. 
     
     
         9 . A method according to  claim 1 , wherein the stone surface comprises at least one of a granite surface, a marble surface, a cement surface, a terrazzo surface, a ceramic tile surface, or a concrete surface. 
     
     
         10 . (canceled) 
     
     
         11 . A structured abrasive article comprising a structured abrasive layer adhered to a major surface of a backing, wherein the structured abrasive layer comprises shaped abrasive composites adhered to the major surface, wherein the shaped abrasive composites comprise milled polycrystalline ceramic abrasive particles retained in a polymeric binder, wherein the milled polycrystalline ceramic abrasive particles have a mean particle size D 50  of from 14 to 18 microns, and wherein the milled polycrystalline ceramic abrasive particles comprise milled polycrystalline alumina particles. 
     
     
         12 . The structured abrasive article of  claim 11 , wherein the structured abrasive layer has a bearing area ratio of from 40 percent to 70 percent. 
     
     
         13 . (canceled) 
     
     
         14 . The structured abrasive article of  claim 11 , wherein the abrasive composites comprise hexagonal prisms. 
     
     
         15 . The structured abrasive article of  claim 11 , wherein the milled polycrystalline ceramic abrasive particles have an average Vickers hardness of at least 21 gigapascals. 
     
     
         16 . The structured abrasive article of  claim 11 , wherein the milled polycrystalline ceramic abrasive particles have an average fracture toughness of at least 3 megapascal-meter −0.5 .