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    Curable liquid developers
    2.
    发明授权
    Curable liquid developers 失效

    公开(公告)号：US5395724A

    公开(公告)日：1995-03-07

    申请号：US13132

    申请日：1993-02-03

    申请人： Ian D. Morrison ,  Bing R. Hsieh ,  Jerry H. Taylor

    发明人： Ian D. Morrison ,  Bing R. Hsieh ,  Jerry H. Taylor

    IPC分类号： G03G9/12 ,  G03G9/00

    CPC分类号： G03G9/00 ,  G03G9/12

    摘要： Disclosed is a liquid developer comprising a colorant and a substantial amount of a curable liquid vehicle having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 10.sup.8 ohm-cm. One embodiment of the invention is directed to an electrophoretic liquid developer comprising a substantial amount of a curable liquid vehicle having a viscosity of no more than about 20 centipoise and a resistivity of no less than about 5.times.10.sup.9 ohm-cm, a charge control agent, and colored particles capable of becoming charged and migrating through the liquid vehicle to develop an electrostatic latent image. Another embodiment of the invention is directed to a polarizable liquid developer comprising a colorant and a substantial amount of a curable liquid vehicle having a viscosity of from about 25 to about 500 centipoise and a resistivity of from about 10.sup.8 to about 10.sup.11 ohm-cm. Yet another embodiment of the invention is directed to a photoelectrophoretic liquid developer comprising a substantial amount of a curable liquid vehicle having a viscosity of no more than about 20 centipoise and a resistivity of no less than about 5.times.10.sup.9 ohm-cm and photosensitive colored particles. A specific embodiment of the invention is directed to a liquid developer comprising a colorant, a substantial amount of a curable liquid vehicle having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 10.sup.8 ohm-cm, and solid particles containing an initiator substantially insoluble in the liquid vehicle and capable, upon activation, of initiating polymerization of the curable liquid vehicle. In one embodiment, the colorant comprises pigment particles and the initiator is contained on the surfaces of the pigment particles. In another embodiment, the developer contains polymeric particles and the initiator is contained on the surfaces of the polymeric particles. In yet another embodiment, the colorant comprises toner particles which comprise a pigment and a polymer, and the initiator is contained on the surfaces of the toner particles. In still another embodiment, the initiator is contained on the surfaces of solid particles such as silicas, clays, or the like. The initiator can also be contained within the solid particles.

    Liquid developers having curable liquid vehicles
    3.
    发明授权
    Liquid developers having curable liquid vehicles 失效

    公开(公告)号：US5364726A

    公开(公告)日：1994-11-15

    申请号：US17055

    申请日：1993-02-02

    申请人： Ian D. Morrison ,  Bing R. Hsieh ,  Jerry H. Taylor

    发明人： Ian D. Morrison ,  Bing R. Hsieh ,  Jerry H. Taylor

    IPC分类号： G03G9/12 ,  G03G9/125 ,  G03G9/13 ,  G03G17/04

    CPC分类号： G03G17/04 ,  G03G9/12 ,  G03G9/125 ,  G03G9/131

    摘要： Disclosed is a liquid developer comprising a colorant and a substantial amount of a curable liquid vehicle having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 10.sub.8 ohm-cm. One embodiment of the invention is directed to an electrophoretic liquid developer comprising a substantial amount of a curable liquid vehicle having a viscosity of no more than about 20 centipoise and a resistivity of no less than about 5.times.10.sup.9 ohm-cm, a charge control agent, and colored particles capable of becoming charged and migrating through the liquid vehicle to develop an electrostatic latent image. Another embodiment of the invention is directed to a polarizable liquid developer comprising a colorant and a substantial amount of a curable liquid vehicle having a viscosity of from about 25 to about 500 centipoise and a resistivity of from about 10.sup.8 to about 10.sup.11 ohm-cm. Yet another embodiment of the invention is directed to a photoelectrophoretic liquid developer comprising a substantial amount of a curable liquid vehicle having a viscosity of no more than about 20 centipoise and a resistivity of no less than about 5.times.10.sup.9 ohm-cm and photosensitive colored particles. A specific embodiment of the invention is directed to a liquid developer comprising a colorant, a substantial amount of a curable liquid vehicle having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 10.sup.8 ohm-cm, and solid particles containing an initiator substantially insoluble in the liquid vehicle and capable, upon activation, of initiating polymerization of the curable liquid vehicle. In one embodiment, the colorant comprises pigment particles and the initiator is contained on the surfaces of the pigment particles. In another embodiment, the developer contains polymeric particles and the initiator is contained on the surfaces of the polymeric particles. In yet another embodiment, the colorant comprises toner particles which comprise a pigment and a polymer, and the initiator is contained on the surfaces of the toner particles. In still another embodiment, the initiator is contained on the surfaces of solid particles such as silicas, clays, or the like. The initiator can also be contained within the solid particles.

    Processes for pigment dispersion and articles therefrom
    5.
    发明授权
    Processes for pigment dispersion and articles therefrom 失效
    颜料分散方法及其制品

    公开(公告)号：US5449582A

    公开(公告)日：1995-09-12

    申请号：US254721

    申请日：1994-06-06

    申请人： Bing R. Hsieh ,  Andrew R. Melnyk ,  Jerry H. Taylor ,  Paul A. Harmer

    发明人： Bing R. Hsieh ,  Andrew R. Melnyk ,  Jerry H. Taylor ,  Paul A. Harmer

    IPC分类号： G03G5/05 ,  G03G5/06

    CPC分类号： G03G5/06 ,  G03G5/0507 ,  G03G5/051 ,  G03G5/0525

    摘要： A process for preparing ultrafine pigment dispersions comprising providing a solubilized mixture of pigment-Lewis acid complex and an aprotic organic solvent; precipitating the resulting solubilized complex into a protic solvent thereby forming a dispersion of ultrafine pigment particles; removing the aprotic and protic solvents to afford a wet cake containing finely divided pigment particles; optionally neutralizing and washing the wet cake particles; and redispersing the resulting ultrafine pigment particles in an aqueous solution, an organic solvent, or mixtures thereof, and a binder resin to form an ultrafine pigment and binder resin dispersion.

    摘要翻译： 一种制备超细颜料分散体的方法，包括提供颜料 - 路易斯酸配合物和非质子有机溶剂的溶解混合物; 将所得溶解的络合物沉淀成质子溶剂，从而形成超细颜料颗粒的分散体; 除去非质子和质子溶剂，得到含有细碎颜料颗粒的湿饼; 任选地中和并洗涤湿饼颗粒; 并将所得超细颜料颗粒再分散在水溶液，有机溶剂或其混合物中，以及粘合剂树脂，以形成超细颜料和粘合剂树脂分散体。