Patent ID: 8507405

Claim:
A method of producing an aqueous ultrafine titania sol having (1) a pH >10, (2) a solids component having at least 50% by weight of anatase crystal form of TiO 2 particles and less than 50% by weight of at least one inorganic oxide other than TiO 2 , and (3) an aqueous component comprising a mixture of a weak base having a pKa <10.5 and a strong base having a pKa >10.5, wherein the anatase crystal form of TiO 2 particles are present in the aqueous titania sol at a mass fraction >0.25 and/or a volume fraction >0.25, comprising the step of processing the aqueous ultrafine titania sol via media milling until the anatase crystal form of TiO 2 particles therein have a particle size <1 μm.