| 摘要 |
PURPOSE:To permit the development and transfer faithfully to a latent image, to maintain an initial characteristic even after continuous use for a long period of time and to prevent flocculation of toner and charge in the electrostatic charge characteristic thereby incorporating a binder resin, coloring agent and specific compd. into the toner. CONSTITUTION:This toner for electrophotography is used for development of the electrostatic charge image and contains at least the binder resin, the color agent and the compd. expressed by formula [I]. In formula (I), A denotes a compd. residue having a phenolic group, B denotes the group expressed by formula (II), R1 denotes a methylene group or ethylene group R2 denotes an alkylene group or arylene group of 1-8C, R3, R4 denote a hydrogen group, alkyl group, aryl group, etc., of 1-8C, (p) denotes 1-200 number, (p) denotes 0 or 1 (r) denotes 0 or an integer in the range of 1-3. The development and transfer faithful to the latent image are thereby permitted and in addition, the initial characteristic is maintained even after the long-period continuous use. The developer which is free from the flocculation of the toner and the change in the electrostatic charge characteristic thereof is thereby obtd. |
