| 摘要 |
PURPOSE:To provide the toner which exhibits triboelectrostatic chargeability of a stable positive polarity, is excellent in environmental stability, is free from surface staining and toner splashing and forms the images of the high fidelity equiv. to the initial images even after continuous copying by incorporating a specific bisaminophenyl methane compd. into the toner. CONSTITUTION:The toner consisting of at least a binder resin and coloring agent contains the bisaminophenyl methane compd. expressed by the formula I. In the formula, R1 denotes 1 to 11C alkyl group, substd. or unsubstd. phenyl group, etc.; R2, R3 may be respectively the same or different and denote hydrogen, 1 to 14C alkyl group, etc.; R4, R5 may be respectively the same or different and denote hydrogen, alkyl group, etc. The toner which exhibits the triboelectrostatic chargeability of the stable positive polarity, is free from the surface staining and toner splashing, and forms the images equiv. to the initial images even after the continuous copying is obtd. in this way and the excellent environmental stability is obtd. as well. |
