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    • 31. 发明授权
    • Cationic Toner processes
    • 阳离子调色剂工艺
    • US5645968A
    • 1997-07-08
    • US726600
    • 1996-10-07
    • Guerino G. SacripanteMaureen M. KedianRaj D. PatelWalter MychajlowskijBeng S. Ong
    • Guerino G. SacripanteMaureen M. KedianRaj D. PatelWalter MychajlowskijBeng S. Ong
    • G03G9/087G03G9/08
    • G03G9/0804
    • A process for the preparation of toner comprising(i) preparing, or providing a cationic emulsion resin latex comprised of a resin derived from at least one olefinic nonpolar monomer, a cationic olefinic monomer, a cationic free radical initiator, and optionally a chain transfer agent in an aqueous mixture comprised of a nonionic surfactant and a cationic surfactant, and which mixture is heated at a temperature of from about 60.degree. C. to about 95.degree. C.;(ii) adjusting the pH of said cationic latex to from about 10 to about 14 by the addition of a base;(iii) preparing, or providing a pigment dispersion, which dispersion is comprised of a pigment and an anionic surfactant, and optionally a charge control agent;(iv) shearing said pigment dispersion with the pH adjusted latex of (ii) and heating below about the resin Tg to form electrostatically bound toner size aggregates, and optionally adding a cationic surfactant to stabilize the size of the toner aggregates; and(v) heating said electrostatically bound toner size aggregates above about the Tg of the resin to form coalesced toner particles; followed by optionally filtering, washing and drying the toner obtained.
    • 一种制备调色剂的方法,包括(i)制备或提供由至少一种烯属非极性单体衍生的树脂,阳离子烯烃单体,阳离子自由基引发剂和任选的链转移剂组成的阳离子乳液树脂胶乳 在由非离子表面活性剂和阳离子表面活性剂组成的含水混合物中,将混合物在约60℃至约95℃的温度下加热; (ii)通过加入碱将所述阳离子胶乳的pH调节至约10至约14; (iii)制备或提供颜料分散体,该分散体由颜料和阴离子表面活性剂以及任选的电荷控制剂组成; (iv)用(ii)的pH调节的胶乳剪切所述颜料分散体,并加热到树脂Tg附近,以形成静电结合的调色剂尺寸聚集体,以及任选地加入阳离子表面活性剂以稳定调色剂聚集体的尺寸; 和(v)在所述树脂的Tg附近加热所述静电结合的调色剂尺寸聚集体以形成聚结的调色剂颗粒; 然后任选地过滤,洗涤和干燥获得的调色剂。
    • 32. 发明授权
    • Toner processes
    • 墨粉处理
    • US5858601A
    • 1999-01-12
    • US127851
    • 1998-08-03
    • Beng S. OngT. Hwee NgWalter MychajlowskijRaj D. PatelPatricia A. Burns
    • Beng S. OngT. Hwee NgWalter MychajlowskijRaj D. PatelPatricia A. Burns
    • G03G9/08G03G9/093
    • G03G9/093G03G9/0804
    • A process for the preparation of toner comprising(i) blending (a) a colorant dispersion containing a first ionic surfactant with (b) a latex emulsion comprised of an aqueous dispersion of core-shell polymer particles with a crosslinked polymer core and a linear polymer shell, and optional nonionic surfactant and a second ionic surfactant with a charge polarity opposite to that of said first ionic surfactant in said colorant dispersion;(ii) heating the resulting mixture at about below the glass transition temperature (Tg) of the linear latex shell polymer to form aggregates; and(iii) subsequently heating said aggregates about above the Tg of the linear latex shell polymer to effect coalescence and fusion of said aggregates.
    • 一种制备调色剂的方法,包括(i)将(a)含有第一离子表面活性剂的着色剂分散体与(b)由核 - 壳聚合物颗粒的水性分散体与交联的聚合物核心和线性聚合物组成的胶乳乳液 壳和任选的非离子表面活性剂和在所述着色剂分散体中具有与所述第一离子表面活性剂的电荷极性相反的电荷的第二离子表面活性剂; (ii)将所得混合物加热至低于线性胶乳壳聚合物的玻璃化转变温度(Tg)以形成聚集体; 和(iii)随后将所述聚集体加热至高于线性胶乳壳聚合物的Tg,以实现所述聚集体的聚结和熔融。
    • 37. 发明授权
    • Toner processes
    • 墨粉处理
    • US5902710A
    • 1999-05-11
    • US132949
    • 1998-08-12
    • Beng S. OngRaj D. Patel
    • Beng S. OngRaj D. Patel
    • G03G9/097B82B1/00G03G9/08G03G9/087
    • G03G9/0804
    • A process for the preparation of toner comprising(i) preparing, or providing an aqueous colorant dispersion, which dispersion is comprised of a colorant and an ionic surfactant in water;(ii) blending said colorant dispersion with a latex emulsion comprised of resin particles, a nonionic surfactant, and an ionic surfactant of opposite charge polarity to that of the ionic surfactant in said colorant dispersion;(iii) heating the resulting mixture below about the glass transition temperature (Tg) of the latex resin to form toner sized aggregates;(iv) heating the resulting aggregate suspension of (iii) above about the Tg of the latex resin; and(v) retaining the temperature in the range of from about 30.degree. C. to about 95.degree. C., and subsequently, adding an aqueous solution of boric acid, or an aqueous solution of a metal salt; adjusting the pH of the resulting reaction mixture to from about 9 to about 12 by the addition of a base, followed by the addition of a salicylic acid or catechol; and optionally(vi) isolating, washing and drying the toner obtained.
    • 一种制备调色剂的方法,包括(i)制备或提供水性着色剂分散体,该分散体由着色剂和离子表面活性剂在水中组成; (ii)将所述着色剂分散体与由所述着色剂分散体中的离子表面活性剂相反的极性的树脂颗粒,非离子表面活性剂和离子表面活性剂组成的胶乳乳液混合; (iii)将所得混合物加热至胶乳树脂的玻璃化转变温度(Tg)以下以形成调色剂尺寸的聚集体; (iv)在胶乳树脂的Tg附近加热(iii)所得的聚集体悬浮液; 和(v)将温度保持在约30℃至约95℃的范围内,随后加入硼酸水溶液或金属盐水溶液; 通过加入碱将所得反应混合物的pH调节至约9至约12,然后加入水杨酸或儿茶酚; 和(vi)分离,洗涤和干燥获得的调色剂。