Patent ID: 6916368

Claim:
A curable film-forming composition that on curing produces an abrasion resistant coating, comprising in a medium (i) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a crosslinking agent; (ii) 10 to 90 percent by weight based on the total weight of resin solids in the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) 20 to 85 percent by volume based on the total volume of the film-forming composition of particles having a mean particle size less than 100 nm, and having an affinity for the medium sufficient to keep the particles suspended therein, said affinity of the particles for the medium being greater than the affinity of the particles for each other, thereby preventing agglomeration of the particles within the medium, and wherein the particles are substantially free of functional groups on the particle surface.