| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable kneading at a high temp. and to obtain an electrophotographic positive charge type toner which suppresses fogging and scattering and ensures improved anti-offsetting property. SOLUTION: A bonding resin whose melt viscosity is 5×10<3> P at 150 deg.C and 1×10<3> P at 170 deg.C, a colorant and a compd. represented by the formula as an electrostatic charge controlling agent are used as principal components and 1-10 pts.wt. magnetite of 0.2-0.6μm average particle diameter is added as a dispersant for the compd. They are melted and kneaded at 170-200 deg.C kneading temp. to obtain the objective electrophotographic positive charge type toner.</p> |
