Patent ID: 6780920
Filing Date: 2004-08-24
Classification: B41M,C01P,C08K,Y10T

Abstract:
A dispersion comprising porous inorganic oxide particles having(c) a median particle size in the range of 0.05 to about 3 microns; and (d) porosity such that when an aqueous dispersion of the particles is dried at least about 0.5 cc/g of pore volume as measured by BJH nitrogen porosimetry is from pores having a pore size of 600 Ã¥ or smaller; wherein the inorganic oxide particles have a zeta potential of at least +20 mV and said particles possess a viscosity derived pore volume (PVa) of at least 0.5 cc/g as governed by the relationship: slope=2.5({fraction (1/&rgr;s)}+PVa) &rgr;f â€ƒwhere the slope is about 2.4 or greater, &rgr;s is the particles skeletal density and &rgr;f is the density of dispersion fluid phase.