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    Carrier composition
    1.
    发明授权
    Carrier composition 有权
    载体组成

    公开(公告)号：US07419755B2

    公开(公告)日：2008-09-02

    申请号：US11159035

    申请日：2005-06-22

    申请人： Deepak R. Maniar ,  Thomas C. Dombroski ,  Christopher M. Pattison ,  Bernard A. Kelly

    发明人： Deepak R. Maniar ,  Thomas C. Dombroski ,  Christopher M. Pattison ,  Bernard A. Kelly

    IPC分类号： G03G9/00

    CPC分类号： G03G9/1133 ,  G03G9/107 ,  G03G9/1135 ,  G03G9/1137

    摘要： Carrier particles comprise a core and a polymer coating that comprises a mixture of polymethyl methacrlyate (PMMA) and melamine. The coating compositions comprise from about 60 to about 80 percent by weight of PMMA and from about 20 to about 40 percent by weight of melamine. The carriers may be combined with a toner to provide a developer suitable for use in an electrostatographic process. Carriers comprising the PMMA/melamine coatings exhibit increased triboelectric charging, a more conductive carrier, and also contribute to reducing toner cohesion.

    摘要翻译： 载体颗粒包含芯和聚合物涂层，其包含聚甲基丙烯酸甲酯（PMMA）和三聚氰胺的混合物。 涂料组合物包含约60至约80重量％的PMMA和约20至约40重量％的三聚氰胺。 载体可以与调色剂组合以提供适合用于静电照相方法的显影剂。 包含PMMA /三聚氰胺涂层的载体表现出增加的摩擦电荷，更导电的载体，并且还有助于减少调色剂的内聚力。

    Carrier coating and processes
    8.
    发明授权
    Carrier coating and processes 失效
    载体涂层和工艺

    公开(公告)号：US5496675A

    公开(公告)日：1996-03-05

    申请号：US265909

    申请日：1994-06-27

    申请人： John G. Van Dusen ,  Michael Cunningham ,  Bernard A. Kelly

    发明人： John G. Van Dusen ,  Michael Cunningham ,  Bernard A. Kelly

    IPC分类号： G03G9/113 ,  G03G9/087 ,  G03G9/083 ,  G03G9/107

    CPC分类号： G03G9/1139 ,  G03G9/1131 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1137

    摘要： A process for the preparation of conductive, electronegative, submicron polymeric particles comprised of a first polymer optionally containing from about 1 to about 50 percent by weight of a conductive filler and a second electronegative, contrast polymer, and wherein said conductive polymer particles with optional filler are prepared by mixing at least one monomer with a polymerization initiator, a crosslinking component and a chain transfer component; effecting bulk polymerization until from about 5 to about 50 weight percent of the monomer has been polymerized; terminating polymerization by cooling the partially polymerized monomer; adding thereto from about 1 to about 50 weight percent of a conductive filler or conductive fillers, followed by mixing thereof; dispersing the aforementioned mixture of conductive filler or fillers, and partially polymerized product in water containing a stabilizing component to obtain a suspension of particles with an average diameter of from about 0.05 to about 1 micron in water; polymerizing the resulting suspension by heating; adding a second contrast polymer emulsion, suspension or fine dispersion with high shear mixing; and optionally subsequently washing and drying the polymer particles obtained.

    摘要翻译： 一种用于制备导电的，负电性的亚微米聚合物颗粒的方法，所述颗粒由任选地包含约1-约50重量％的导电填料和第二电负性对比度聚合物的第一聚合物组成，并且其中所述导电聚合物颗粒具有任选的填料 通过将至少一种单体与聚合引发剂，交联组分和链转移组分混合来制备; 直到约5至约50重量％的单体已经聚合才能进行本体聚合; 通过冷却部分聚合的单体终止聚合; 加入约1至约50重量％的导电填料或导电填料，然后混合; 将上述导电填料或填料的混合物和部分聚合的产物分散在含有稳定组分的水中以获得在水中平均直径为约0.05至约1微米的颗粒的悬浮液; 通过加热使得到的悬浮液聚合; 加入第二种对比聚合物乳液，悬浮液或细分散体，高剪切混合; 并任选地随后洗涤和干燥获得的聚合物颗粒。

    Surfactant-free semi-continuous emulsion polymerization process for making submicron sized particles for carrier coatings
    9.
    发明授权
    Surfactant-free semi-continuous emulsion polymerization process for making submicron sized particles for carrier coatings 有权
    用于制造载体涂层的亚微米尺寸颗粒的无表面活性剂半连续乳液聚合方法

    公开(公告)号：US06399701B1

    公开(公告)日：2002-06-04

    申请号：US09570724

    申请日：2000-05-15

    申请人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

    发明人： Thomas E. Enright ,  Anthony James Paine ,  George Liebermann ,  Kenneth Derek Henderson ,  Scott M. Silence ,  Bernard A. Kelly

    IPC分类号： C08L3102

    CPC分类号： G03G9/1133 ,  C08F2/22 ,  C08F20/14 ,  G03G9/1131

    摘要： Submicron sized particles of poly(methyl methacrylate) are prepared by a surfactant-free semi-continuous emulsion polymerization process that involves (i) preparing an aqueous phase containing a free radical initiator in water by heating and stirring, (ii) preparing a monomer composition containing at least 80% by weight methyl methacrylate and 1 to 10% by weight of a crosslinking agent, (iii) adding the monomer composition to the aqueous phase to initiate emulsion polymerization of the monomer composition, the adding being done at a rate such that from 0.05% to 5% by weight of the total weight of the monomer composition is added per minute, (iv) continuing heating and stirring following completion of the adding of the monomer composition for an amount of time, and (v) drying and recovering the submicron sized particles of poly(methyl methacrylate). The submicron sized particles of poly(methyl methacrylate are used in forming a coating of carrier particles for a two-component developer composition.

    摘要翻译： 聚甲基丙烯酸甲酯的亚微米尺寸颗粒是通过无表面活性剂的半连续乳液聚合方法制备的，其包括（i）通过加热和搅拌在水中制备含有自由基引发剂的水相，（ii）制备单体组合物 含有至少80重量％的甲基丙烯酸甲酯和1至10重量％的交联剂，（iii）将单体组合物加入到水相中以引发单体组合物的乳液聚合，加入的速率使得 每分钟加入0.05〜5重量％的单体组合物，（iv）在完成单体组合物加入一段时间后继续加热和搅拌，（v）干燥和回收 聚甲基丙烯酸甲酯的亚微米尺寸颗粒。 聚（甲基丙烯酸甲酯）的亚微米尺寸的颗粒用于形成用于双组分显影剂组合物的载体颗粒的涂层。

    Polymer coated carrier particles for electrophotographic developers
    10.
    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。