Patent ID: 7811342

Claim:
A method of preparing a coated abrasive tool, comprising the steps of: a) combining a prepolymer having a free isocyanate content selected from the group consisting of polyester-based isophoronediisocyanate (IPDI), polyester-based toluene diisocyanate (TDI), polyether-based IPDI, polyether-based TDI, polyether-polyester-based IPDI, polyether-polyester-based TDI, and mixtures thereof and a polymeric polyol to thereby form a polyurethane adhesive composition; wherein the prepolymer and polymeric polyol are present in a ratio of between about 20:1 and about 3:1 by weight; b) applying the polyurethane adhesive composition over a substrate to thereby form a polyurethane-adhesive-composition-coated substrate; c) curing the polyurethane-adhesive-composition-coated substrate to thereby form a polyurethane-adhesive-coated substrate; and d) applying an abrasive material over the substrate at a time selected from the group consisting of prior to, after, and simultaneously with, the application of the polyurethane adhesive composition to the substrate, to thereby form the coated abrasive tool.