| 摘要 |
PURPOSE:To reduce the rate of electric charge attenuation during electrostatic storage by constituting a titled toner of coloring agent, electrostatic charge control agents and a binder consisting of thermoplastic resins having Lewis acid functional groups in part. CONSTITUTION:The toner is constituted of coloring agents, electric charge control agent imparting positive chargeability, for example, oil black of nigrosine type, basic triphenyl methane dyes having ion centers to dissociate to positive ions, and the like, and thermoplastic resins having Lewis acid functional groups selected from carboxyl groups, carbonyl groups, nitro groups, cyano groups, glycidyl groups, nitrile groups, epoxy groups, etc. attracting electron pairs as a binder. Thereby, the toner of less rate of electric charge attenuation under various environmental conditions and upon lapse of days is obtained. |
