| 摘要 |
PURPOSE:To uniformly disperse an electrostatic charge control agent and to improve image quality by dispersing the charge control agent in the presence of a specific compd. CONSTITUTION:This toner contains a binder polymer (e.g.: styrene/n-butyl acrylate copolymer), the charge control agent, coloring agent and the polyoxyalkylene(alkyl)phenyl ether deriv. expressed by the formula I and/or the formula II. In the formulas, R1 denotes a alkyl of 1-18C, H; R2 denotes H, CH3; A denotes alkylene of 2-4C; l denotes 1-20; m denotes 1-5; n denotes 1-100. The charge control agent is preferably an azo metallic complex dye (e.g. the dye expressed by the formula III). This toner is obtd. by dispersing the charge control agent, coloring agent, etc., in the presence of the above- mentioned deriv. into a polymerizable monomer, then subjecting the dispersion to a suspension polymn. |
