METHOD OF MANUFACTURING ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER

摘要

PROBLEM TO BE SOLVED: To provide a new manufacturing method by which the occurrence of deformed particles is suppressed to the utmost and a nearly spherical chemical toner having a sharp particle size distribution is manufactured, and to provide a new manufacturing method by which no emulsification loss is caused and a chemical toner having the above properties is manufactured in a high yield. SOLUTION: The method of manufacturing an electrostatic charge image developing toner comprises the steps of dissolving or dispersing a carboxylic binder resin and an organic pigment in an organic solvent to prepare a colored resin solution; emulsifying the colored resin solution in an aqueous medium using 1-3 equivalents of a basic compound based on the total amount of carboxyl groups to form fine particles of the colored resin solution in the aqueous medium; thereby forming the agglomerates of the fine particles by sequentially adding a dispersion stabilizer and an electrolyte; and separating the agglomerates from the aqueous medium after removing the organic solvent in the agglomerates and then carrying out drying. COPYRIGHT: (C)2004,JPO&NCIPI