Coated abrasives having aggregates

A coated abrasive article, comprising:

• a backing substrate;
• a polymeric make coat binder composition disposed on the backing substrate;
• a plurality of abrasive particles disposed on or in the make coat binder composition;
• a polymeric size coat composition disposed over the make coat composition;
• and
• a plurality of grinding aid aggregates comprising a mixture of polymeric binder composition and a grinding aid composition, wherein the grinding aid aggregates are disposed on the make coat composition, on the size coat composition, or a combination thereof, wherein the grinding aid composition comprises potassium tetrafluoroborate (KBF4), cryolite (Na3AlF6), sodium ferrifluoride (Na3FeF6), sodium hexafluorostrontium (Na2SrF6), ammonium hexafluorophosphate (NH4PF6), calcium fluoride (CaF2), calcium phosphate (Ca3(PO4)2), magnesium sulfate (MnSO4), lithium carbonate (Li2CO3), potassium aluminum fluoride (K3AlF6), or a combination thereof;
• wherein the grinding aid aggregates comprise:
• 60-99 wt % of the grinding aid composition;
• and
• 1-40 wt % of the polymeric binder composition;
• wherein the grinding aid aggregates are disposed to have an average particle height (HGAA) as measured from the backing substrate, wherein the abrasive particles are disposed to have an average particle height (HABR) as measured from the backing substrate, and wherein the ratio of HGAA/HABR ranges from 0.5 to 10;
• and
• wherein the grinding aid aggregates have a total cross-sectional area (AGAA), wherein the abrasive particles have an a total cross-sectional area (AABR), and wherein the ratio of AABR/AGAA ranges from 1 to 1000.