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    • 8. 发明申请
    • TWO COMPONENT DEVELOPER
    • 两个组件开发商
    • US20080233507A1
    • 2008-09-25
    • US12013158
    • 2008-01-11
    • Hiroshi YamazakiMikio KouyamaKen Ohmura
    • Hiroshi YamazakiMikio KouyamaKen Ohmura
    • G03G9/087
    • G03G9/08711G03G9/0806G03G9/08755G03G9/08795G03G9/1075G03G9/1135
    • A two component developer used in an electrophotographic method composed of a toner containing at least a resin and a colorant, and a carrier, is disclosed. The resin is composed of a polyester resin and a styrene-acryl resin, in which the polyester resin is prepared via condensation-polymerization of a polyvalent carboxylic acid and a polyol in a state where a styrene monomer and an acrylate monomer exist in an aqueous medium containing an acidic compound, followed by formation of the styrene-acryl resin via radical polymerization of the styrene monomer and the acrylate monomer; and the carrier comprises magnetic material powder dispersed in a binder resin, and has a volume based median diameter of 10 μm-100 μm, a shape factor SF-1 of 1.0-1.2, and a shape factor SF-2 of 1.1-2.5.
    • 公开了一种用于由至少包含树脂和着色剂的调色剂和载体组成的电子照相方法中使用的双组分显影剂。 该树脂由聚酯树脂和苯乙烯 - 丙烯酸树脂组成,其中聚酯树脂是通过多价羧酸和多元醇在水性介质中存在苯乙烯单体和丙烯酸酯单体的状态下进行缩聚制得的 含有酸性化合物,然后通过苯乙烯单体和丙烯酸酯单体的自由基聚合形成苯乙烯 - 丙烯酸树脂; 载体包含分散在粘合剂树脂中的磁性材料粉末,体积基准中值粒径为10〜100μm,形状因子SF-1为1.0〜1.2,形状因子SF-2为1.1〜2.5。