Patent ID: 7754787

Claim:
In a curable film-forming composition comprising: a) a film-forming resin comprising a polymeric polyol having a hydroxyl equivalent weight greater than 380 g/equivalent based on resin solids of the polymeric polyol itself, and a crosslinking agent reactive with the polymeric polyol; and b) a sol of particles suspended in an organic medium, wherein said sol of particles is prepared by a method comprising: i) providing a suspension of particles in an aqueous medium; ii) adding a first organic liquid compatible with the aqueous medium to form an admixture; iii) reacting the particles in the admixture with a first modifying compound, wherein the first modifying compound comprises (1) a group that does not react with the particles and (2) a functional group capable of reacting with functional groups on the particles, wherein (1) and (2) are linked by a linking moiety, and wherein the group that does not react with the particles comprises an ethylenically unsaturated group; iv) reacting the particles with a second modifying compound, wherein the second modifying compound is different from the first and comprises a hydrophobic group and a functional group capable of reacting with functional groups on the particles; and v) adding a second organic liquid compatible with the liquid portion of the admixture either before or after the particles are reacted with the second modifying compound, wherein the second organic liquid is different from the first organic liquid used in step ii); wherein when the second organic liquid is added to the admixture before the particles are reacted with the second modifying compound, the admixture is maintained at a temperature and pressure and for a time sufficient to substantially remove the water and the first organic liquid added in step ii) before reacting the particles with the second modifying compound.