Patent ID: 8628596

Claim:
A method of forming a coated abrasive article, the method comprising: providing a colloidal composite binder composition and abrasive grains on a backing, the colloidal composite binder composition comprising based on the weight of the colloidal composite binder composition, about 5 wt % to about 80 wt % of a dispersion of colloidal silica suspended in an external phase of a cationically curable polymer resin, wherein the colloidal silica has an average particle size of 3 nm to 100 nm; about 10 wt % to about 60 wt % of cationically polymerizable compound, wherein the cationically polymerizable compound is the same or different than the cationically curable polymer resin in which the colloidal silica is suspended; and about 5 wt % to about 20 wt % of an aliphatic polyol, a polyesterpolyol, or a polyetherpolyol; and curing the composite binder.