| 摘要 |
<p>PROBLEM TO BE SOLVED: To stabilize the electrostatic charge of toners and to make it possible to obtain toners having excellent fixability, offset resistance, waste toner recyclability and transfer efficiency with good reproducibility by adding lanoline or lanoline derivative into the toners. SOLUTION: The toners have at least a binder resin, external additives and the lanoline or the lanoline derivative. The lanoline derivative is preferably one or >=2 kinds selected from a group consisting of the metal salt of lanoline fatty acid, lanoline fatty acid ester, hydrogenated lanoline and rigid lanoline. Further, the binder resin is preferably 100,000 to 600,000 in the weight average molecular weight Mw of a molecular weight distribution, 50 to 100 in the ratio Mw/Mn of the weight average molecular weight Mw and a number average molecular weight Mn, 350 to 1200 in the ratio Mz/Mn of a Z average molecular weight Mz and the number average molecular weight Mn, and 100 to 145 deg.C in 1/2 outflow temperature in a flow tester recommended by the Society of Polymer Chemistry.</p> |
