Patent ID: 7737187

Claim:
A process for producing an inorganic oxide organosol, comprising: (A) adding a silicon alkoxide having two or more alkoxy groups bonded to a silicon atom, to a hydrophilic inorganic oxide sol containing methanol in an amount of 25 to 100% by weight in a dispersion medium to treat a surface of inorganic oxide particles in the sol with the silicon alkoxide; and (B) replacing the dispersion medium of the surface treated inorganic oxide sol obtained in step (A) by distillation with a non-alcoholic organic solvent in the presence of a primary alcohol with 4 to 12 carbon atoms which is at least one primary alcohol selected from the group consisting of isobutyl alcohol, n-butyl alcohol, n-pentyl alcohol, n-octyl alcohol, ethylene glycol monobutyl ether, propylene glycol monomethyl ether and benzyl alcohol, wherein the silicon alkoxide in step (A) is a dialkyl dialkoxy silane, an alkyl trialkoxy silane, a diphenyl dialkoxy silane or a phenyl trialkoxy silane; said alkoxy groups have 1 to 4 carbon atoms bonded to a silicon atom; and said alkyl groups have 4 to 20 carbon atoms bonded to a silicon atom.