| 摘要 |
PURPOSE:To obtain the toner sufficient in chargeability and capable of forming excellent image quality by suspension-polymerizing a monomer in the presence of a charge controller and coloring the polymer particles with a colorant. CONSTITUTION:The charge controller is uniformly mixed with the liquid monomer, and a polymerization initiator is added to form an oil phase. This oil phase is added into an aqueous phase prepared by uniformly dispersing a dispersion adjuvant, and the oil drops are dispersed with a continuous dispersing machine to reduce the diameters of the drops to a value suitable for the toner. This dispersion is supplied into a polymerization reactor provided with a stirrer, a condenser, a thermometer, a nitrogen introducing tube, and the reactor is heated to the decomposition point of the polymerization initiator and polymerization is carried out in an atmosphere of nitrogen. At the end of the polymerization, the colorant, such as dye or pigment, is added to the polymer liquid dispersion, and further stirred to color the toner to an optional color, thus permitting the obtained toner to be sufficient in chargeability and to form excellent image quality. |
