Patent ID: 7563555
Filing Date: 2009-07-21
Classification: G03G

Abstract:
1. A method for manufacturing a toner comprising toner particles, comprising: dissolving or dispersing a toner composition, comprising dispersing the oil phase liquid in an aqueous medium comprising a particulate material while subjecting the polyester prepolymer (A) to an addition polymerization reaction using said compound having said active hydrogen as a cross-linking agent, extending agent or both, to prepare a urea-modified polyester resin and to prepare a dispersion; removing at least the organic solvent from the dispersion to prepare the toner particles comprising a binder resin which comprises said urea-modified polyester resin and said second resin having a weight average molecular weight of from 2,000 to 10,000; washing the toner particles; and drying the toner particles; wherein said particulate material comprises a particulate resin which is crosslinked; wherein said binder resin has a glass transition temperature of from 35° C. to below 55° C.; wherein the particulate material is embedded into the surface of the toner particles; wherein the particulate material has an average particle diameter of from 0.002 to 0.2 times that of the toner particles.