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    • 22. 发明授权
    • Liquid developers and toner aggregation processes
    • 液体显影剂和调色剂聚集过程
    • US5536615A
    • 1996-07-16
    • US498206
    • 1995-07-05
    • Michael A. HopperRaj D. PatelGrazyna E. Kmiecik-LawrynowiczPeter G. OdellBernard GrushkinGeorge A. Gibson
    • Michael A. HopperRaj D. PatelGrazyna E. Kmiecik-LawrynowiczPeter G. OdellBernard GrushkinGeorge A. Gibson
    • G03G9/08G03G9/12G03G9/135G03G9/13
    • G03G9/12G03G9/0804G03G9/0819G03G9/1355
    • A process for the preparation of liquid developers comprising:(i) preparing a pigment dispersion, which dispersion is comprised of a pigment, and an ionic surfactant;(ii) shearing said pigment dispersion with a latex or emulsion blend comprised of a nonionic surfactant, resin, and a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and optionally adding further anionic, or nonionic surfactant to stabilize the aggregates obtained in (iii);(iii) heating the above resulting sheared aqueous blend below about the glass transition temperature (Tg) of the resin to form toner size aggregates with a narrow particle size distribution;(iv) heating said bound aggregates above about the Tg of the resin to form toner size particles in an aqueous medium and which particles possess a narrow particle size distribution; and(v) separating from the aqueous medium toner particles of resin and pigment, and dispersing said toner particles in a carrier fluid.
    • 一种用于制备液体显影剂的方法,包括:(i)制备颜料分散体,该分散体由颜料和离子表面活性剂组成; (ii)用包含非离子表面活性剂,树脂和抗衡离子表面活性剂的胶乳或乳液共混物剪切所述颜料分散体,所述非离子表面活性剂,树脂和所述离子表面活性剂的电荷极性与所述离子表面活性剂具有相反的电荷极性, (iii)中得到的聚集体; (iii)将上述所得的剪切含水混合物加热到低于树脂的玻璃化转变温度(Tg)的温度以形成具有窄粒度分布的调色剂尺寸聚集体; (iv)将所述结合的聚集体加热到树脂的Tg附近,以在水性介质中形成调色剂颗粒,并且该颗粒具有窄的粒度分布; 和(v)从水性介质中分离树脂和颜料的调色剂颗粒,并将所述调色剂颗粒分散在载体流体中。
    • 23. 发明授权
    • Toner aggregation processes
    • 调色剂聚合过程
    • US5496676A
    • 1996-03-05
    • US411196
    • 1995-03-27
    • Melvin D. CroucherRaj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperBernard Grushkin
    • Melvin D. CroucherRaj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperBernard Grushkin
    • G03G9/08G03G9/087
    • G03G9/0815G03G9/0804
    • A process comprising:(i) preparing a pigment dispersion comprised of pigment, ionic surfactant, and optional charge control agent;(ii) mixing at least two resins in the form of latexes, each latex comprising a resin, ionic and nonionic surfactants and optionally a charge control agent, and wherein the ionic surfactant has a countercharge to the ionic surfactant of (i) to obtain a latex blend;(iii) shearing said pigment dispersion with the latex blend of (ii) comprised of resins, counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant;(iv) heating the above sheared blends of (iii) below about the glass transition temperature (Tg) of the resin, to form electrostatically bound toner size aggregates with a narrow particle size distribution; and(v) subsequently adding further anionic surfactant solution to minimize further growth of the bound aggregates (vi);(vi) heating said bound aggregates above about the glass transition temperature Tg of the resin to form stable toner particles; and optionally(vii) separating and drying the toner.
    • 一种方法,包括:(i)制备由颜料,离子表面活性剂和任选的电荷控制剂组成的颜料分散体; (ii)混合至少两种胶乳形式的树脂,每种胶乳包含树脂,离子和非离子表面活性剂以及任选的电荷控制剂,并且其中所述离子表面活性剂与(i)的离子表面活性剂相反,以获得 胶乳混合物 (iii)用(ii)由树脂构成的胶乳混合物剪切所述颜料分散体,具有与所述离子表面活性剂相反的电荷极性的反离子表面活性剂和非离子表面活性剂; (iv)将上述(iii)的剪切混合物加热到约树脂的玻璃化转变温度(Tg)以下以形成具有窄粒度分布的静电结合的调色剂尺寸聚集体; 和(v)随后加入另外的阴离子表面活性剂溶液以使结合的聚集体(vi)的进一步生长最小化。 (vi)将所述结合的聚集体加热到高于树脂的玻璃化转变温度Tg以形成稳定的调色剂颗粒; 和(vii)分离和干燥调色剂。