| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner which is free of fogging on an image at the time of copying, can prevent filming on a photoreceptor surface, does not give rise to degradation in transfer efficiency and electrostatic chargeability even in long-term use and is high in fixability. SOLUTION: The electrostatic charge image developing toner is prepared by allowing inorganic particulates (d) to exist on the surfaces of parent toner particles formed by adding particulates (c) of 11 to 81 nm in average primary particle size obtained by subjecting the inorganic particulates (c') to a surface treatment by a surface treating agent lower in hardness and/or outflow initiation temperature than that of a binder resin (a) to at least the binder resin (a) and a colorant (b) and mixing the mixture. The inorganic particulates (c') in the particulates (c) are preferably subjected to a hydrophobing treatment by at least one selected from a silane coupling agent, silicone oil and titanate coupling agent prior to the surface treatment. Also, the amount of the inorganic particulates (c') in the particulates (c) is preferably 0.5 to 10 parts by weight per 100 parts by weight the binder resin (a). COPYRIGHT: (C)2005,JPO&NCIPI
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