| 摘要 |
PURPOSE:To stabilize the triboelectrostatic charge with an electrostatic charge imparting member and to sharply uniformize a triboelectrostatic charge distribution as well as to enable the control to the electrostatic charge quantity suitable for a developing system by incorporating the compd. expressed by prescribed formula into the toner. CONSTITUTION:The compd. expressed by formula I is incorporated into the toner consisting of at least a binder resin and coloring agent. In formula, R<1> denotes a substd. or unsubstd. alkyl group, substd. or unsubstd. aryl group; R<2>, R<3>, R<4> denote a hydrogen atom, substd. or unsubstd. alkyl group, substd. or unsubstd. aryl group; Ar<1> denotes a substd. or unsubstd. aryl group; Ar<2> denotes a substd. or unsubstd. arylene group, respectively; Ar<1> and R<1> jointly form a ring; (n) denotes 0 or 1 integer. |
