Patent ID: 7105263
Filing Date: 2006-09-12
Classification: G03G

Abstract:
1. A method of making dry electrographic toner particles, comprising the steps of: a) dispersing at least one visual enhancement additive in a composition comprising a solvent having a Kauri-butanol number less than 30 ml and S portion prepolymer; b) conducting a dispersion polymerization by reacting D portion materials with the S portion prepolymer to form an amphipathic copolymer, thereby encapsulating the visual enhancement additive within a layer of amphipathic copolymer to form encapsulated pigmented organosol particles wherein the S portions and the D portions have respective solubilities in the solvent that are sufficiently different from each other such that the S portions tend to be more solvated by the solvent while the D portions tend to be more dispersed in the solvent; and c) drying the encapsulated pigmented organosol particles under conditions so that the particles are at a temperature below the T