Patent ID: 7344573

Claim:
A method for fabricating a heterogeneous additive impregnated abrasive article, said method comprising: a) providing a heterogeneous abrasive article having a pore structure; b) dissolving an additive in a supercritical fluid, wherein the additive is selected from the group consisting of: alkanes, C16-C40 alkanes and their non-polar derivatives, C10 or greater cycloalkanes and their non-polar derivatives, C10 or greater alkenes and their non-polar derivatives, C10 or greater arenes and their non-polar derivatives, alkanes with molecular structures greater than n-octadecane (C18H38), cycloalkanes, cyclic paraffins, non-polar derivatives of cycloalkanes that have melting points in excess of about 50 degrees Celsius, arenes, aromatic hydrocarbons, biphenyl (C12H10), non-polar derivatives of arenes, butyl carbamate, non-polar sulfur containing compounds, non-polar polyethylenes, fluoropolymers, polytetrafluoroethylene, tetracosane (C 24 H 50 ), lipids, hydrocarbons, waxes, fluoropolymer resins, dyes, paraffin wax, camauba wax, and mixtures thereof; c) exposing the abrasive article to the additive-containing supercritical fluid in a reaction vessel at a pressure in excess of atmospheric pressure, whereby the additive is carried into the pore structure; and d) depressurizing the reaction vessel to dispose the supercritical fluid below its critical point for a period of time sufficient to dissociate the additive from the fluid, whereby the additive is deposited within the pore structure.