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    Processes for the preparation of liquid developers with low vapor pressure components
    6.
    发明授权
    Processes for the preparation of liquid developers with low vapor pressure components 失效
    用于制备具有低蒸汽压组分的液体显影剂的方法

    公开(公告)号：US4797342A

    公开(公告)日：1989-01-10

    申请号：US124230

    申请日：1987-11-23

    申请人： Melvin D. Croucher ,  Raymond W. Wong ,  Stephan Drappel

    发明人： Melvin D. Croucher ,  Raymond W. Wong ,  Stephan Drappel

    IPC分类号： G03G9/12 ,  G03G9/135

    CPC分类号： G03G9/12 ,  G03G9/1355

    摘要： A process for the preparation of liquid developer compositions which comprises mixing a resin with a low vapor pressure oil at elevated temperatures permitting the resin to melt and enabling the formation of a resin oil mixture; thereafter adding to the oil resin mixture at elevated temperatures pigment particles, and stirring until the pigment has become dispersed in the resin; followed by attriting the mixture while cooling, for example, to ambient temperatures; thereafter filtering the aforementioned mixture, and dispersing the product in a low viscosity oil; and subsequently adding to the formed mixture a charge control additive.

    摘要翻译： 一种制备液体显影剂组合物的方法，其包括在升高的温度下将树脂与低蒸气压油混合，使树脂熔化并使树脂油混合物形成; 然后在升高的颜料颗粒中加入油树脂混合物中，并搅拌直到颜料分散在树脂中; 然后在例如冷却到环境温度时磨碎混合物; 然后过滤上述混合物，并将产物分散在低粘度油中; 并随后向形成的混合物中加入改变控制添加剂。

    Liquid developer compositions containing polyolefin resins
    7.
    发明授权
    Liquid developer compositions containing polyolefin resins 失效
    含有聚烯烃树脂的液体显影剂组合物

    公开(公告)号：US5030535A

    公开(公告)日：1991-07-09

    申请号：US300395

    申请日：1989-01-23

    申请人： Stephan Drappel ,  Timothy J. Fuller ,  Melvin D. Croucher ,  James D. Mayo ,  Raymond W. Wong

    发明人： Stephan Drappel ,  Timothy J. Fuller ,  Melvin D. Croucher ,  James D. Mayo ,  Raymond W. Wong

    IPC分类号： G03G9/13

    CPC分类号： G03G9/131

    摘要： Disclosed is a liquid developer composition comprising a liquid vehicle, a charge control additive, and toner particles containing pigment particles and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof. Preferred resins include poly-.alpha.-olefins and chlorinated polypropylenes. The resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures. Also disclosed is a liquid developer composition comprising a liquid vehicle, pigment particles, a charge control additive, and a resin selected from the group consisting of polyolefins, halogenated polyolefins, and mixtures thereof, wherein the resin is soluble in the liquid vehicle at elevated temperatures and insoluble in the liquid vehicle at ambient temperatures, and wherein the liquid developer is prepared by dissolving the resin in the liquid vehicle at temperatures of from about 80.degree. C. to about 120.degree. C., subsequently adding the pigment particles to the resulting solution, attriting the resulting mixture for from about 20 minutes to about 75 minutes, cooling the mixture to ambient temperature over a period of from about 1 hour to about 3 hours with continuous mixing, and subsequently adding to the mixture the charge control additive.

    摘要翻译： 公开了包含液体载体，电荷控制添加剂和含有颜料颗粒的调色剂颗粒和选自聚烯烃，卤代聚烯烃及其混合物的树脂的液体显影剂组合物。 优选的树脂包括聚-α-烯烃和氯化聚丙烯。 树脂在高温下可溶于液体载体，在环境温度下不溶于液体载体。 还公开了一种液体显影剂组合物，其包含液体载体，颜料颗粒，电荷控制添加剂和选自聚烯烃，卤代聚烯烃及其混合物的树脂，其中树脂在高温下可溶于液体载体 并且在环境温度下不溶于液体载体，其中液体显影剂是通过在约80℃至约120℃的温度下将树脂溶解在液体载体中制备的，随后将颜料颗粒加入到所得溶液中 ，将所得混合物磨碎约20分钟至约75分钟，连续混合，在约1小时至约3小时的时间内将混合物冷却至环境温度，随后将混合物加入电荷控制添加剂。

    Liquid developer compositions
    9.
    发明授权
    Liquid developer compositions 失效
    液体显影剂组合物

    公开(公告)号：US4880720A

    公开(公告)日：1989-11-14

    申请号：US197132

    申请日：1988-05-23

    申请人： Stephan Drappel ,  Raymond W. Wong ,  Melvin D. Croucher

    发明人： Stephan Drappel ,  Raymond W. Wong ,  Melvin D. Croucher

    IPC分类号： G03G9/12 ,  G03G9/13

    CPC分类号： G03G9/122 ,  G03G9/12

    摘要： Disclosed is an electrophotographic liquid developer composition comprising a liquid medium, first toner particles charged to one polarity and comprising a resin and a first pigment, second toner particles charged to a polarity opposite to that of the first toner particles and comprising a resin and a second pigment of a color different from that of the first pigment, and a charge director. The disclosed developer is suitable for developing electrostatic latent images in two different colors in a single development step. The latent image comprises three areas of charge; toner particles of one color are selectively attracted to one area, toner particles of the other color are selectively attracted to the second area, and the third area remains undeveloped as a background area.

    Liquid electrophotographic developer comprising oppositely charged toner particles and dyes of different colors
    10.
    发明授权
    Liquid electrophotographic developer comprising oppositely charged toner particles and dyes of different colors 失效
    包含相反电荷的调色剂颗粒和不同颜色染料的液体电子照相显影剂

    公开(公告)号：US4830945A

    公开(公告)日：1989-05-16

    申请号：US197130

    申请日：1988-05-23

    申请人： Raymond W. Wong ,  Stephan Drappel ,  Melvin D. Croucher

    发明人： Raymond W. Wong ,  Stephan Drappel ,  Melvin D. Croucher

    IPC分类号： G03G9/12 ,  G03G9/13 ,  G03G13/01

    CPC分类号： G03G9/122 ,  G03G13/013 ,  G03G9/12 ,  Y10S430/105

    摘要： Disclosed is an electrophotographic liquid developer composition comprising a liquid medium, first toner particles charged to one polarity and comprising a first dye and polymeric cores to which steric stabilizer polymers have been attached, second toner particles charged to a polarity opposite to that of the first toner particles and comprising a second dye of a different color than the first dye and polymeric cores to which steric stabilizer polymers have been attached, and a charge director. The disclosed developer is suitable for developing electrostatic latent images in two different colors in a single development step. The latent image comprises three areas of charge, toner particles of one color are selectively attracted to one area, toner particles of the other color are selectively attracted to the second area, and the third area remains undeveloped as a background area.