Patent ID: 7173065

Claim:
A method of making a stable dispersion of a conductive hydrophilic metal oxide comprising: A) adding a dispersion of nanoparticles of a conductive hydrophilic metal oxide in a first solvent to a mixing vessel, B) adding a second, hydrophobic, solvent to said mixing vessel with sufficient agitation to maintain said metal oxide nanoparticles in dispersion or in clusters having an average size of less than 1 Î¼m, and C) adding a binder premix comprising a binder in said second solvent to said mixing vessel with a shear rate sufficient to allow growth of clusters of said metal oxide nanoparticles to an average size of 1 Î¼m or less to form a stable dispersion of said metal oxide clusters, wherein steps B and C can be carried out sequentially or simultaneously after step A.