| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a full-color toner having good pigment dispersibility, which is a toner obtained by water-based granulation using at least a polyester resin as a binder resin, and to provide a production method of the toner and a toner master batch for the toner and the method. <P>SOLUTION: The full-color electrophotographic toner is obtained by suspending and granulating an oil phase of a toner material containing at least a binder resin and/or its precursor, a coloring material and a release agent in an aqueous medium. The coloring material is prepared into a master batch by preliminarily dispersing the coloring material in a master batch resin. At least two types of resins having different viscosities are used as the master batch resin. A resin R1 having the highest viscosity has a storage modulus G1' of 8.0×10E4 to 5.0×10E5 at 90°C; and a resin R2 having the lowest viscosity has a storage modulus G2' of 2.0×10E4 to 7.0×10E4 at 90°C. <P>COPYRIGHT: (C)2013,JPO&INPIT |
