Patent ID: 8062820
Filing Date: 2011-11-22
Classification: G03G,Y10T

Abstract:
1. A toner composition comprising (a) toner particles, and (b) composite metal oxide particles comprising (i) a core consisting of a first metal oxide, wherein the core is substantially spherical and non-aggregated and has a surface, and (ii) a coating consisting of a second metal oxide, wherein the coating is adhered to the surface of the core, the coating is continuous or non-continuous, and the second metal oxide is identical to or different from the first metal oxide, and wherein the first metal oxide and the second metal oxide are selected from the group consisting of silica, alumina, titania, zinc oxide, tin oxide, and cerium oxide, with the proviso that the second metal oxide is not identical to the first metal oxide if the coating is continuous, and wherein the composite metal oxide particles have a geometric standard deviation σ