| 摘要 |
<p>PURPOSE:To provide a color toner high in fixation strength and excellent in fixing property at a low temp., environmental dependency of electrification, characteristics of image quality, preservation stability over a long time, grindability, surface glossiness and the like. CONSTITUTION:The electrostatic charge image developing color toner contains a binder resin and a coloring agent and further a spherical external additive having 20-80nm average particle diameter and an external additive having 5-20nm average particle diameter. A compound having a polyvalent hydroxy compound component expressed by a general formula (1), a compound having a polyvalent hydroxy compound component expressed by a general formula (11) and preferably with these mixture, a polyester resin essentially consististing of glycerine are used as the binder resin. The solubility parameter of the binder resin is preferably 10.6-12.5. (In the general formulas (1) and (11), each of (a), (b), (c) and (d) is integer and each of (a+b) and (c+d) is 2-7.)</p> |
