Patent ID: 8864862

Claim:
Abrasive grains selected from the group consisting of aluminum oxide, fused aluminum oxide, sintered aluminum oxide, alumina zirconia, silicon carbide, boron carbide, cubic boron nitride, diamond and mixtures thereof, the abrasive grains having a geopolymeric coating, the coating comprising a binder and a micro-particle inorganic powder, the binder comprising: an aluminosilicate with a molar ratio of Al 2 O 3 to SiO 2 of 1:2 to 1:20, sodium silicate, and water, wherein the precursor to the binder is a water-diluted base mixture of approximately 60 percent to approximately 90 percent by weight of water, wherein the coating is applied directly to the abrasive grains, and wherein the coated abrasive grains have an NTU-value ranging from 196 to 817.