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    • 3. 发明授权
    • Carrier processes
    • 运营商流程
    • US5582951A
    • 1996-12-10
    • US498284
    • 1995-07-03
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperWalter MychajlowskijBeng S. Ong
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperWalter MychajlowskijBeng S. Ong
    • G03G9/107G03G9/113
    • G03G9/1133G03G9/107G03G9/1132
    • A process for the preparation of carrier particles which comprises mixing a dispersion of water, submicron magnetic particles, and ionic surfactant with a latex comprised of resin particles suspended in an aqueous solution containing a surfactant that is counterionic in charge to said ionic surfactant, and a nonionic surfactant; thereafter heating the resulting mixture below about the latex resin glass transition temperature (Tg) while stirring to form aggregates, followed by increasing the temperature of said mixture to about above the latex resin Tg, and subsequently adding additional counterionic or nonionic surfactant solution to minimize, or avoid any further growth in particle size during heating of the mixture about above the latex resin Tg, and wherein said resin Tg is in the range of from between about 45.degree. C. to about 100.degree. C.
    • 一种制备载体颗粒的方法,其包括将水,亚微米磁性颗粒和离子表面活性剂的分散体与悬浮在含有负离子表面活性剂的水溶液中的树脂颗粒混合到所述离子表面活性剂上的胶乳混合,以及 非离子表面活性剂 然后在搅拌下将所得混合物在胶乳树脂玻璃化转变温度(Tg)以下加热以形成聚集体,随后将所述混合物的温度升高至胶乳树脂Tg的大约,然后加入另外的抗衡离子或非离子表面活性剂溶液, 或者避免混合物加热到胶乳树脂Tg以上时粒径的任何进一步增长,并且其中所述树脂Tg在约45℃至约100℃的范围内。