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    • 26. 发明授权
    • Production of toner for developing electrostatic images
    • 生产用于显影静电图像的调色剂
    • US5464722A
    • 1995-11-07
    • US176231
    • 1994-01-03
    • Koichi TomiyamaHiroshi YusaTakakuni Kobori
    • Koichi TomiyamaHiroshi YusaTakakuni Kobori
    • C09C1/30C09C1/36G03G9/08G03G9/087
    • C09C1/3081C09C1/3684G03G9/081G03G9/0817C01P2004/61
    • A toner for developing electrostatic images is produced through a process including the steps of: pre-mixing binder resin particles carrying or containing inorganic fine powder to prepare a premix; melt-kneading the premix to obtain a kneaded product; cooling the kneaded product to obtain a colored resinous solid; pulverizing the colored resinous solid to obtain a pulverized product; and classifying the pulverized product to obtain toner particles. The inclusion of the resin particles carrying or containing inorganic fine powder improves the performance of the pre-mixing to provide an improved dispersion of toner materials within the product toner particles. A fine powder fraction from the classifying step can also be recycled to the premixing step. The resin particles can be toner particles per se. The inorganic fine powder may preferably be silica fine powder treated with silicone oil.
    • 通过包括以下步骤的方法生产用于静电图像显影的调色剂:预先混合携带或含有无机细粉末的粘合剂树脂颗粒以制备预混物; 熔融捏合预混物以获得捏合产物; 冷却捏合产物得到有色树脂固体; 粉碎着色树脂固体,得到粉碎物; 并对粉碎产物进行分级以获得调色剂颗粒。 携带或含有无机细粉末的树脂颗粒的包含改善了预混合的性能,以提供调色剂材料在产品调色剂颗粒内的改进的分散体。 来自分级步骤的细粉末部分也可以再循环到预混合步骤。 树脂颗粒本身可以是调色剂颗粒。 无机细粉末优选为用硅油处理的二氧化硅细粉末。