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    • 1. 发明授权
    • Wax Containing toner aggregation processes
    • 蜡含有调色剂聚集工艺
    • US5482812A
    • 1996-01-09
    • US344060
    • 1994-11-23
    • Michael A. HopperRaj D. PatelGrazyna E. Kmiecik-LawrynowiczStephan V. DrappelPaul J. Gerroir
    • Michael A. HopperRaj D. PatelGrazyna E. Kmiecik-LawrynowiczStephan V. DrappelPaul J. Gerroir
    • G03G9/08G03G9/087
    • G03G9/0804G03G9/0815
    • A process for the preparation of toner compositions or toner particles comprising:(i) providing an aqueous pigment dispersion comprised of a pigment, an ionic surfactant, and optionally a charge control agent;(ii) providing a wax dispersion comprised of wax, a dispersant comprised of nonionic surfactant, ionic surfactant or mixtures thereof;(iii) shearing a mixture of the wax dispersion and the pigment dispersion with a latex or emulsion blend comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant;(iv) heating the above sheared blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates with a narrow particle size distribution;(v) adding additional ionic surfactant to the aggregated suspension of (iv) to ensure that no, or minimal additional particle growth of the electrostatically bound toner size aggregates occurs on further increasing the temperature to coalesce the aggregates into toner particles (vi);(vi) heating the mixture of (v) with bound aggregates above about or at the Tg of the resin; and optionally(vii) separating the toner particles from the aqueous slurry by filtration and thereafter optionally washing.
    • 一种制备调色剂组合物或调色剂颗粒的方法,包括:(i)提供由颜料,离子表面活性剂和任选的电荷控制剂组成的水性颜料分散体; (ii)提供由蜡组成的蜡分散体,由非离子表面活性剂,离子表面活性剂或其混合物组成的分散剂; (iii)用由树脂,具有与所述离子表面活性剂的电荷极性相反的电荷极性的抗衡离子表面活性剂和非离子表面活性剂组成的胶乳或乳液共混物来剪切蜡分散体和颜料分散体的混合物; (iv)将上述剪切混合物加热至低于树脂的玻璃化转变温度(Tg),以形成具有窄粒度分布的静电结合的调色剂尺寸聚集体; (v)向(iv)的聚集悬浮液中加入另外的离子表面活性剂,以确保在进一步升高温度以使聚集体聚结成调色剂颗粒(vi)时,静电结合的调色剂尺寸聚集体不会发生或最小的附加颗粒生长。 (vi)将(v)混合物加热至高于树脂Tg或高于Tg的结合聚集体; 并且任选地(vii)通过过滤从调色剂颗粒与含水浆料分离,然后任选地洗涤。