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    • 9. 发明公开
    • Toner for developing electrostatic image, image forming apparatus and process cartridge
    • Toner zur Entwicklung elektrostatischer Bilde,Bilderzeugungsgerätund Prozesskassette。
    • EP0621513A2
    • 1994-10-26
    • EP94106066.7
    • 1994-04-19
    • CANON KABUSHIKI KAISHA
    • Taya, Masaaki, c/o Canon Kabushiki KaishaKohtaki, Takaaki, c/o Canon Kabushiki KaishaUnno, Makoto, c/o Canon Kabushiki KaishaDoujo, Tadashi, c/o Canon Kabushiki Kaisha
    • G03G9/097G03G9/08G03G9/087G03G9/09
    • G03G9/08755G03G9/0819G03G9/091
    • A toner for developing an electrostatic image is constituted by at least a binder resin and a charge control agent. The binder resin has an acid value of 5 - 50. The charge control agent comprises an iron complex represented by the following formula:
      wherein X 1 and X 2 independently denote hydrogen atom, lower alkyl group, lower alkoxy group, nitro group or halogen atom; m and m' denote an integer of 1 - 3; R 1 and R 3 independently denote hydrogen atom, C 1-18 alkyl or alkenyl, sufonamide, mesyl, sulfonic acid group, carboxy ester group, hydroxy, C 1-18 alkoxy, acetylamino, benzoylamino or halogen atom; n and n' denote an integer of 1 - 3; R 2 and R 4 denote hydrogen atom or nitro group; and A+ denotes hydrogen ion, sodium ion, potassium ion or ammonium ion. The toner has a weight-average particle size (D 4 ) of 4 - 9 µm and including toner particles having a particle size of 5 µm or smaller at 3 - 90 % by number, toner particles having a particle size of 6.35 - 10.08 µm at 1 - 80 % by number and toner particles having a particle size of 12.7 µm or larger at a percentage by volume of at most 2.0 %, wherein the toner particles having a particle size of 5.0 µm or smaller are contained at N % by number and at V % by volume satisfying a relationship: wherein k is a positive number in the range of 3.0 - 7.5.
    • 用于显影静电图像的调色剂由至少粘合剂树脂和电荷控制剂构成。 粘合剂树脂的酸值为5-50。电荷控制剂包括由下式表示的铁络合物:其中X1和X2独立地表示氢原子,低级烷基,低级烷氧基,硝基或卤素 原子; m和m'表示1-3的整数; R1和R3独立地表示氢原子,C1-18烷基或烯基,磺酰胺,甲磺酰基,磺酸基,羧基酯基,羟基,C1-18烷氧基,乙酰氨基,苯甲酰基氨基或卤素原子; n和n'表示1-3的整数; R2和R4表示氢原子或硝基; A +表示氢离子,钠离子,钾离子或铵离子。 调色剂的重均粒径(D4)为4〜9μm,包括粒径为5μm以下的调色剂颗粒,数量为3〜90%,调色剂粒子的粒径为6.35〜10.08 以数量为1〜80%的粒径和粒径为12.7μm以上的调色剂颗粒,其体积百分比至多为2.0%,其中粒径为5.0μm或更小的调色剂颗粒包含在 N%的数量和体积百分比满足关系:N / V = -0.05N + k,其中k为3.0-7.5范围内的正数。