Patent ID: 6835519
Filing Date: 2004-12-28
Classification: G03G

Abstract:
A process comprisingdissolving or dispersing a toner composition comprising a polyester-containing prepolymer and a colorant in an organic solvent to prepare a liquid, dispersing said liquid in an aqueous medium in the presence of at least one of an inorganic dispersant or a powdery polymer to obtain a dispersion, subjecting said dispersion to a polyaddition reaction to polymerize said prepolymer and to obtain a reaction mixture; and removing the solvent from said reaction mixture to obtain a dry toner comprising a modified polyester having a molecular weight distribution according to gel permeation chromatography wherein (a) a main peak is present in a molecular weight region of 1000 to 30,000, (b) that portion of the modified polyester having a molecular weight of at least 30,000 accounts for 1 to 10% based on a total weight of the modified polyester, and (c) a ratio (Mw/Mn) of the weight average molecular weight Mw of the modified polyester to the number average molecular weight Mn of the modified polyester is not smaller than 2 but not greater than 15.