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    Polymer coated carrier particles for electrophotographic developers
    1.
    发明授权
    Polymer coated carrier particles for electrophotographic developers 有权
    用于电子照相显影剂的聚合物涂覆的载体颗粒

    公开(公告)号：US06245474B1

    公开(公告)日：2001-06-12

    申请号：US09520446

    申请日：2000-03-07

    申请人： George R. Hsu ,  Scott M. Silence ,  Lynne M. Tatar ,  Bernard A. Kelly ,  Pinyen Lin

    发明人： George R. Hsu ,  Scott M. Silence ,  Lynne M. Tatar ,  Bernard A. Kelly ,  Pinyen Lin

    IPC分类号： G03G910

    CPC分类号： G03G9/1133 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1134

    摘要： A coated carrier having a core particle coated with a mixture of an electronegative insulating polymer comprising a polyvinylidenefluoride polymer or copolymer and an electropositive conductive polymer comprising a polymethyl methacrylate polymer or copolymer with a conductive material dispersed therein is made by powder coating. The coated carrier has unique properties, including a conductivity of from 1.1×10−14 to 1.0×10−8 mho-cm−1, a triboelectric charging value of from 12 to 20 and an average particle diameter of from 65 to 75, rendering the coated carrier ideal for use in a developer to be used in a magnetic brush type development apparatus. The powder coating method includes mixing the core particle and the mixture of negatively charging polymer and conductive polymer until the mixture of negatively charging polymer and conductive polymer adheres to the core particle, heating the mixture of the core particle and the mixture of negatively charging polymer and conductive polymer until the mixture of negatively charging polymer and conductive polymer melts and fuses to the core particle, and cooling the coated core obtained.

    摘要翻译： 通过粉末涂料制成涂覆载体，其具有涂覆有包含聚偏二氟乙烯聚合物或共聚物的电负极绝缘聚合物和包含分散有导电材料的聚甲基丙烯酸甲酯聚合物或共聚物的正电导电聚合物的混合物的核心颗粒。 涂层载体具有独特的性能，包括电导率为1.1×10-14至1.0×10-8mho-cm-1，摩擦带电值为12至20，平均粒径为65至75，使涂层 载体用于用于磁刷式显影装置的显影剂中。 粉末涂布方法包括将核心颗粒和负电荷聚合物和导电聚合物的混合物混合，直到带负电的聚合物和导电聚合物的混合物粘附到核心颗粒，加热核心颗粒和负电聚合物的混合物和 导电聚合物，直到带负电的聚合物和导电聚合物的混合物熔化并熔化到核心颗粒，并冷却涂覆的芯获得。

    Electrophotographic coated carrier particles and methods thereof
    4.
    发明授权
    Electrophotographic coated carrier particles and methods thereof 失效
    电子照相涂层载体颗粒及其方法

    公开(公告)号：US5015550A

    公开(公告)日：1991-05-14

    申请号：US491763

    申请日：1990-03-12

    申请人： John A. Creatura ,  George R. Hsu

    发明人： John A. Creatura ,  George R. Hsu

    IPC分类号： G03G9/113

    CPC分类号： G03G9/1134 ,  G03G9/1131 ,  G03G9/1133 ,  Y10S526/934

    摘要： Disclosed is a carrier and developer composition, and a process for the preparation of carrier particles with substantially stable conductivity parameters which comprises (1) providing carrier cores and a polymer mixture, (2) dry mixing the cores and the polymer mixture, (3) heating the carrier core particles and polymer mixture, whereby the polymer mixture melts and fuses to the carrier core particles; and (4) thereafter cooling the resulting coated carrier particles.

    摘要翻译： 公开了一种载体和显影剂组合物，以及用于制备具有基本上稳定的电导率参数的载体颗粒的方法，其包括（1）提供载体芯和聚合物混合物，（2）干燥混合芯和聚合物混合物，（3） 加热载体芯颗粒和聚合物混合物，由此聚合物​​混合物熔化并熔合到载体芯颗粒上; 和（4）然后冷却所得涂覆的载体颗粒。

    Electrophotographic carrier particles coated with polymer mixture
    8.
    发明授权
    Electrophotographic carrier particles coated with polymer mixture 失效
    用聚合物混合物涂覆的电子照相载体颗粒

    公开(公告)号：US4935326A

    公开(公告)日：1990-06-19

    申请号：US136792

    申请日：1987-12-22

    申请人： John A. Creatura ,  George R. Hsu

    发明人： John A. Creatura ,  George R. Hsu

    IPC分类号： G03G9/113

    CPC分类号： G03G9/1134 ,  G03G9/1131 ,  G03G9/1133 ,  Y10S524/908 ,  Y10T428/2998

    摘要： Disclosed is a carrier and developer composition, and a process for the preparation of carrier particles with substantially stable conductivity parameters which comprises (1) providing carrier cores and a polymer mixture; (2) dry mixing the cores and the polymer mixture; (3) heating the carrier core particles and polymer mixture, whereby the polymer mixture melts and fuses to the carrier core particles; and (4) thereafter cooling the resulting coated carrier particles.

    摘要翻译： 公开了载体和显影剂组合物，以及用于制备具有基本上稳定的电导率参数的载体颗粒的方法，其包括（1）提供载体芯和聚合物混合物; （2）将芯和聚合物混合物干混; （3）加热载体芯颗粒和聚合物混合物，由此聚合物​​混合物熔化并熔合到载体芯颗粒上; 和（4）然后冷却所得涂覆的载体颗粒。