METHOD FOR PRODUCING SUSPENDED AND POLYMERIZED TONER, AND SUSPENDED POLYMERIZED TONER

PROBLEM TO BE SOLVED: To provide a toner in which the control of particle sizes and a particle size distribution can be easily performed in an aqueous suspension polymerization method, which has the narrowed objective particle size distribution, and, in which deterioration in characteristics at high temperature under high humidity is suppressed by the uniform dispersion of an internal additive, and which has excellent charging stability and environmental stability. SOLUTION: In the method for producing a suspended and polymerized toner produced by subjecting a polymerizable monomer system at least including a coloring agent and a releasing agent in an aqueous medium system, a fatty acid metal salt as the bivalent or trivalent metal salt of ≤30C fatty acid is dispersed into a polymerizable monomer system, the primary particles with the particle sizes of 10 to 100 μm are pulverized by shearing force, are emulsified and dispersed, and are subjected to a high pressure homogenizer applying back pressure for one time, so as to be the secondary particles with the particle sizes of 3 to 10 μm, and the secondary particles are subjected to the suspension polymerization, so as to obtain the suspended and polymerized toner. COPYRIGHT: (C)2009,JPO&INPIT