Non-Scratch Abrasive Composite

Abstract

The present invention is an abrasive composite including a first crosslinkable binder component, wherein when polymerized, has a glass transition temperature (T g ) below room temperature and a modulus of less than about 150 MPa: a second crosslinkable binder component having a T g above room temperature; a material capable of initiating addition polymerization; and particulate grains having a Mohs hardness value of less than or equal to about 3.

What is claimed is: 
     
         1 . An abrasive composite comprising:
 a first crosslinkable binder component, wherein when polymerized, has a glass transition temperature (T g ) below room temperature and a modulus of less than about 150 MPa;   a second crosslinkable binder component having a T g  above room temperature;   a material capable of initiating addition polymerization; and   particulate grains having a Mohs hardness value of less than or equal to about 3.   
     
     
         2 . The abrasive composite of  claim 1 , wherein the first crosslinkable binder component comprises urethane diacrylate or triacrylate. 
     
     
         3 . The abrasive composite of  claim 1 , wherein when polymerized, the first crosslinkable binder component has an elongation percent at break of greater than about 25%. 
     
     
         4 . The abrasive composite of  claim 1 , wherein the second crosslinkable binder component comprises a difunctional or trifunctional acrylate. 
     
     
         5 . The abrasive composite of  claim 1 , wherein the material capable of initiating addition polymerization comprises a UV photoinitiator. 
     
     
         6 . The abrasive composite of  claim 1 , wherein the particulate grains comprise an inorganic mineral having a d 90  of less than about 50 micron. 
     
     
         7 . The abrasive composite of  claim 1 , wherein the abrasive composite includes between about 15 and about 35% by weight of the first crosslinkable binder component. 
     
     
         8 . The abrasive composite of  claim 1 , wherein the abrasive composite includes between about 8 and about 28% by weight of the second crosslinkable binder component. 
     
     
         9 . The abrasive composite of  claim 1 , wherein the abrasive composite includes between about 0.5 and about 2% by weight of the material capable of initiating addition polymerization. 
     
     
         10 . The abrasive composite of  claim 1 , wherein the abrasive composite includes between about 26 and about 80% by weight of the particulate grains. 
     
     
         11 . The abrasive composite of  claim 1 , wherein the particulate grains comprise gypsum. 
     
     
         12 . The abrasive composite of  claim 1 , comprising at least a first particulate grain and a second particulate grain. 
     
     
         13 . A structured abrasive article comprising:
 a substrate; and   an abrasive composite adhered to the substrate, wherein the abrasive composite comprises:
 a first crosslinkable binder component, wherein when polymerized, has a glass transition temperature (T g ) below room temperature and a modulus of less than about 150 MPa; 
 a second crosslinkable binder component having a T g  above room temperature; 
 a material capable of initiating addition polymerization; and 
 particulate grains having a Mohs hardness value of less than or equal to about 3. 
   
     
     
         14 . The structured abrasive article  claim 13 , wherein the structured abrasive article is attached to a handle. 
     
     
         15 . The structured abrasive article of  claim 13 , wherein the structured abrasive article is releasably attached to a handle. 
     
     
         16 . The structured abrasive article  claim 14 , wherein the structured abrasive article is attached to the handle by mechanical means. 
     
     
         17 . The structured abrasive article  claim 14 , wherein the structured abrasive article is attached to the handle by an adhesive. 
     
     
         18 . The structured abrasive article of  claim 13 , further comprising a conformable layer positioned adjacent the substrate. 
     
     
         19 . The structured abrasive article of  claim 18 , further comprising a handle, wherein the conformable layer is positioned between the structured abrasive article and the handle.