Patent ID: 7252921
Filing Date: 2007-08-07
Classification: G03G

Abstract:
1. A process for preparing a toner composition comprising: a) blending an aqueous, liquid state, pigment concentrate dispersion with dry toner components including a binder resin, a charge control agent and a release agent, wherein the aqueous pigment concentrate contributes about 10 wt % to about 15 wt % water to the blend; b) compounding the blend from step (a) to produce a ribbon of molten toner; c) cooling and coarse crushing the toner ribbon; d) jet pulverizing the crushed toner to produce a toner powder with a mean particle size by volume of from about 5 μm to about 15 μm; and e) optionally blending the toner powder with one or more post additive agents, wherein the toner particles exhibit under microscopic examination at 600× magnification substantial uniformity of component content and are substantially free of pigment particle agglomerates and voids having no pigment.