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    Latex processes
    24.
    发明授权
    Latex processes 失效
    乳胶工艺

    公开(公告)号：US06503680B1

    公开(公告)日：2003-01-07

    申请号：US09940926

    申请日：2001-08-29

    申请人： Allan K. Chen ,  George Liebermann ,  Tie Hwee Ng ,  Arthur Helbrecht ,  Emily L. Moore ,  Abdisamed Sheik-qasim ,  Patricia A. Burns ,  Nam S. Ro

    发明人： Allan K. Chen ,  George Liebermann ,  Tie Hwee Ng ,  Arthur Helbrecht ,  Emily L. Moore ,  Abdisamed Sheik-qasim ,  Patricia A. Burns ,  Nam S. Ro

    IPC分类号： G03G9087

    CPC分类号： G03G9/08702 ,  C08F291/00 ,  G03G9/0806 ,  G03G9/081 ,  C08F2/22

    摘要： A process for the preparation of a latex polymer consistent with E/A (emulsion/aggregation/coalescence) toner manufacture. The process utilizes a standard (universal) latex composition and involves chain-transfer agent partitioning, emulsion polymerization that provides a latex polymer with a wide range of molecular properties. In particular, the process customizes a wide range Mw (weight average molecular weight) latex, without substantially varying the Mn (number average molecular weight) and hence, without substantially varying Tg (glass transition temperature) such that good toner performance is maintained. In a preferred process, a latex polymer is prepared by mixing a seed particle latex, generated by aqueous emulsion polymerization of a first portion of a monomer emulsion, with a second portion of the monomer emulsion and at least one chain-transfer agent. The mixing is done in the presence of a free-radical initiator and heated, and wherein the monomer emulsion comprises a mixture of polymerization reagents of at least one monomer, at least one chain-transfer agent, at least one surfactant, and water. This process may be applied to core-shell polymerization as well. These latex polymers are ideally suited in the manufacture of toner and developer for electrophotographic imaging and printing.

    摘要翻译： 制备与E / A（乳液/聚集/聚​​结）调色剂制造一致的胶乳聚合物的方法。 该方法使用标准（通用）胶乳组合物，并涉及链转移剂分配，乳液聚合，其提供具有广泛分子性质的胶乳聚合物。 特别地，该方法定制了宽范围的Mw（重均分子量）胶乳，而基本上不改变Mn（数均分子量），因此没有实质上改变的Tg（玻璃化转变温度），使得维持良好的调色剂性能。 在优选的方法中，通过混合通过单体乳液的第一部分的水乳液聚合产生的种子颗粒胶乳与第二部分单体乳液和至少一种链转移剂来制备胶乳聚合物。 混合在自由基引发剂的存在下进行并加热，其中单体乳液包含至少一种单体，至少一种链转移剂，至少一种表面活性剂和水的聚合试剂的混合物。 该方法也可以应用于核 - 壳聚合。 这些胶乳聚合物非常适用于制造用于电子照相成像和印刷的调色剂和显影剂。

    Toner processes
    26.
    发明授权
    Toner processes 失效
    墨粉处理

    公开(公告)号：US5869216A

    公开(公告)日：1999-02-09

    申请号：US6742

    申请日：1998-01-13

    申请人： Beng S. Ong ,  Walter Mychajlowskij ,  Raj D. Patel ,  Patricia A. Burns ,  Richard P. N. Veregin

    发明人： Beng S. Ong ,  Walter Mychajlowskij ,  Raj D. Patel ,  Patricia A. Burns ,  Richard P. N. Veregin

    IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/097

    CPC分类号： G03G9/0804 ,  G03G9/09733 ,  Y10S977/89

    摘要： A process for the preparation of toner comprising blending an aqueous colorant dispersion and a latex emulsion containing resin; heating the resulting mixture at a temperature below about the glass transition temperature (Tg) of the latex resin to form toner sized aggregates; heating said resulting aggregates at a temperature above about the Tg of the latex resin to effect fusion or coalescence of the aggregates; redispersing said toner in water at a pH of above about 7; contacting the resulting mixture with a metal halide or salt, and then with a mixture of an alkaline base and a salicylic acid, a catechol, or mixtures thereof at a temperature of from about 25.degree. C. to about 80.degree. C.; and optionally isolating the toner product, washing, and drying.

    摘要翻译： 一种制备调色剂的方法，包括混合含水着色剂分散体和含树脂的胶乳乳液; 在低于胶乳树脂的玻璃化转变温度（Tg）的温度下加热所得混合物以形成调色剂尺寸的聚集体; 在高于约胶乳树脂的Tg的温度下加热所述聚集体，以实现聚集体的熔融或聚结; 将所述调色剂在pH高于约7的水中再分散; 在约25℃至约80℃的温度下将所得混合物与金属卤化物或盐接触，然后与碱性碱和水杨酸，儿茶酚或其混合物的混合物接触。 并任选地分离调色剂产物，洗涤和干燥。