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    • 34. 发明授权
    • Toner aggregation process
    • 调色剂聚合过程
    • US5370964A
    • 1994-12-06
    • US158343
    • 1993-11-29
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperMelvin D. CroucherT. Hwee NgWilliam J. Dale
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperMelvin D. CroucherT. Hwee NgWilliam J. Dale
    • G03G9/08
    • G03G9/0815G03G9/0804
    • A process for the preparation of toner comprising:(i) preparing a pigment dispersion in water, which dispersion is comprised of pigment, an ionic surfactant, and an optional charge control agent;(ii) shearing the pigment dispersion with a polymeric latex comprised of resin, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, and which latex contains a nonionic surfactant thereby forming a homogeneous or a uniform blend;(iii) heating the above sheared homogeneous blend below about the glass transition temperature (Tg) of the resin to form electrostatically bound toner size aggregates;(iv) reshearing the above electrostatically bound toner aggregates (iii) to fragment or break down said toner aggregates of (iii) into smaller average diameter particle size;(v) heating the resulting formed sheared homogeneous blend (iv) comprised of resin, pigment particles, and the ionic, counterionic and nonionic surfactants in water below about the glass transition temperature (Tg) of the resin while continuously stirring at about 450 to about 800 revolutions per minute to form electrostatically bound toner size aggregates with a narrow particle size distribution;(vi) adding further ionic or nonionic surfactant in an amount of from about 0.1 to about 10 percent by weight of water to minimize further growth or enlargement of the particles in the coalescence step (vii); and(vii) heating the formed statically bound aggregated particles of (vi) about above the Tg of the resin to provide coalesced particles of toner(viii) separating said toner; and(ix) drying said toner.
    • 一种制备调色剂的方法,包括:(i)在水中制备颜料分散体,该分散体由颜料,离子表面活性剂和任选的电荷控制剂组成; (ii)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的聚合胶乳剪切颜料分散体,并且该胶乳含有非离子表面活性剂,从而形成均匀或均匀的共混物; (iii)在树脂的玻璃化转变温度(Tg)附近加热上述剪切均匀混合物以形成静电结合的调色剂尺寸聚集体; (iv)重新研磨上述静电结合的调色剂聚集体(iii)以将(iii)的所述调色剂聚集体碎裂或分解成更小的平均直径粒径; (v)在低于约玻璃化转变温度(Tg)的树脂下,将所形成的由树脂,颜料颗粒和离子型,抗衡离子和非离子表面活性剂组成的剪切的均匀混合物(iv)加热至约450至约 800转/分钟,形成具有窄粒度分布的静电结合的调色剂尺寸聚集体; (vi)以约0.1至约10重量%的水加入另外的离子或非离子表面活性剂以最小化在聚结步骤(vii)中颗粒的进一步生长或增大; (vii)将所形成的静态结合的(vi)聚集的颗粒加热到树脂的Tg附近,以提供聚结的调色剂颗粒(viii)分离所述调色剂; 和(ix)干燥所述调色剂。
    • 35. 发明授权
    • Toner aggregation processes
    • 调色剂聚合过程
    • US5366841A
    • 1994-11-22
    • US129476
    • 1993-09-30
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperMelvin D. Croucher
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. HopperMelvin D. Croucher
    • G03G9/087G03G9/08
    • G03G9/0804G03G9/0812G03G9/0815
    • A process for the preparation of toner compositions comprising:(i) preparing a pigment dispersion in water, which dispersion is comprised of a pigment, an ionic surfactant and optionally a charge control agent;(ii) shearing the pigment dispersion with a latex blend comprised of resin particles, a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant and a nonionic surfactant thereby causing a flocculation or heterocoagulation of the formed particles of pigment, resin and charge control agent to form a uniform dispersion of solids in the water, and surfactant;(iii) heating the above sheared blend at a critical temperature region about equal to or above the glass transition temperature (Tg) of the resin, while continuously stirring, to form electrostatically bounded toner size aggregates with a narrow particle size distribution and wherein said critical temperature is from about 0.degree. C. to about 10.degree. C. above the resin Tg, and wherein the resin Tg is from about 30.degree. C. to about 65.degree. C. and preferably in the range of from about 45.degree. C. to about 65.degree. C.;(iv) heating the statically bound aggregated particles from about 10.degree. C. to about 45.degree. C. above the Tg of the resin particles to provide a toner composition comprised of polymeric resin, pigment and optionally a charge control agent; and(v) optionally separating and drying said toner.
    • 一种制备调色剂组合物的方法,包括:(i)在水中制备颜料分散体,该分散体由颜料,离子表面活性剂和任选的电荷控制剂组成; (ii)用由树脂颗粒,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的胶乳混合物剪切颜料分散体,从而引起所形成的颜料,树脂颗粒的絮凝或异凝 和电荷控制剂以形成均匀的固体在水中的分散体和表面活性剂; (iii)在连续搅拌的同时在约等于或高于树脂的玻璃化转变温度(Tg)的临界温度区域加热上述剪切共混物,以形成具有窄粒度分布的静电有界调色剂尺寸聚集体,并且其中所述临界 温度在树脂Tg以上约0℃至约10℃,并且其中树脂Tg为约30℃至约65℃,优选为约45℃至约45℃ 约65℃。 (iv)将静态结合的聚集颗粒加热到高于树脂颗粒的Tg的约10℃至约45℃,以提供由聚合树脂,颜料和任选的电荷控制剂组成的调色剂组合物; 和(v)任选地分离和干燥所述调色剂。