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    • 21. 发明授权
    • Toner aggregation and coalescence processes
    • 调色剂聚集和聚结过程
    • US5403693A
    • 1995-04-04
    • US83157
    • 1993-06-25
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. Hopper
    • Raj D. PatelGrazyna E. Kmiecik-LawrynowiczMichael A. Hopper
    • G03G9/087G03G9/08G03G9/09G03G9/097
    • G03G9/0815G03G9/0804G03G9/0812Y10S528/936
    • A process for the preparation of toner compositions with controlled particle size comprising:(i) preparing a pigment dispersion in water, which dispersion is comprised of a pigment, an ionic surfactant in amounts of from about 0.5 to about 10 percent by weight of water, and an optional charge control agent;(ii) shearing the pigment dispersion with a latex mixture comprised of a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, a nonionic surfactant, and resin particles, thereby causing a flocculation or heterocoagulation of the formed particles of pigment, resin, and charge control agent;(iii) stirring the resulting sheared viscous mixture of (ii) at from about 300 to about 1,000 revolutions per minute to form electrostatically bound substantially stable toner size aggregates with a narrow particle size distribution;(iv) reducing the stirring speed in (iii) to from about 100 to about 600 revolutions per minute, and subsequently adding further anionic or nonionic surfactant in the range of from about 0.1 to about 10 percent by weight of water to control, prevent, or minimize further growth or enlargement of the particles in the coalescence step (iii); and(v) heating and coalescing from about 5 to about 50.degree. C. above about the resin glass transition temperature, Tg, which resin Tg is from between about 45.degree. C. to about 90.degree. C. and preferably from between about 50.degree. C. and about 80.degree. C. the statically bound aggregated particles to form said toner composition comprised of resin, pigment and optional charge control agent.
    • 一种用于制备具有受控粒度的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,约0.5至约10重量%的水的离子表面活性剂, 和可选的电荷控制剂; (ii)用包含与所述离子表面活性剂相反电荷极性的反离子表面活性剂,非离子表面活性剂和树脂颗粒的胶体混合物剪切颜料分散体,从而引起所形成的颜料颗粒的絮凝或异凝 ,树脂和电荷控制剂; (iii)以约300至约1,000转/分钟搅拌得到的(ii)剪切粘稠混合物以形成具有窄粒度分布的静电粘合的基本上稳定的调色剂尺寸聚集体; (iv)将(iii)中的搅拌速度降低至约100至约600转/分钟,随后加入约0.1至约10重量%的水的其它阴离子或非离子表面活性剂以控制, 或最小化在聚结步骤(iii)中的颗粒的进一步生长或增大; 和(v)在树脂玻璃化转变温度Tg以上高于约5至约50℃加热和聚结,该树脂Tg为约45℃至约90℃,优选为约50℃ C.和约80℃的静态结合聚集的颗粒以形成由树脂,颜料和任选的电荷控制剂组成的所述调色剂组合物。
    • 23. 发明授权
    • Toner processes
    • 墨粉处理
    • US5346797A
    • 1994-09-13
    • US22575
    • 1993-02-25
    • Grazyna E. Kmiecik-LawrynowiczRaj D. PatelGuerino G. Sacripante
    • Grazyna E. Kmiecik-LawrynowiczRaj D. PatelGuerino G. Sacripante
    • G03G9/087G03G9/08
    • G03G9/0804G03G9/0812
    • A process for the preparation of toner compositions comprising(i) preparing a pigment dispersion in a solvent, which dispersion is comprised of a pigment, an ionic surfactant and optionally a charge control agent;(ii) shearing the pigment dispersion with a latex mixture comprised of a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, a nonionic surfactant and resin particles, thereby causing a flocculation or heterocoagulation of the formed particles of pigment, resin and charge control agent to form electrostatically bound toner size aggregates; and(iii) heating the statically bound aggregated particles to form said toner composition comprised of polymeric resin, pigment and optionally a charge control agent.
    • 一种制备调色剂组合物的方法,包括(i)在溶剂中制备颜料分散体,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)用包含与所述离子表面活性剂相反电荷极性的反离子表面活性剂,非离子表面活性剂和树脂颗粒的胶体混合物剪切所述颜料分散体,从而引起所形成的颜料颗粒的絮凝或杂合, 树脂和电荷控制剂以形成静电结合的调色剂尺寸聚集体; 和(iii)加热静态结合的凝集颗粒以形成由聚合树脂,颜料和任选的电荷控制剂组成的所述调色剂组合物。
    • 28. 发明授权
    • Toner process
    • 调色剂过程
    • US5698223A
    • 1997-12-16
    • US829551
    • 1997-03-28
    • Walter MychajlowskijGuerino G. SacripanteRaj D. PatelGrazyna E. Kmiecik-Lawrynowicz
    • Walter MychajlowskijGuerino G. SacripanteRaj D. PatelGrazyna E. Kmiecik-Lawrynowicz
    • G03G9/08G03G9/087
    • G03G9/0804G03G9/08768
    • A process for the preparation of toner comprising (i) solubilizing an imide based resin in water at pH of from about 10 to about 13 and which solubilizing is accomplished in the presence of nonionic surfactants and anionic surfactants; followed by precipitating the resulting dissolved imide resin into colloidal particles with a size diameter of from about 20 nanometers to about 500 nanometers, and which precipitating is accomplished with a high shearing device operating at a speed of from about 500 to about 2,000 revolutions per minute; acidifying the resulting mixture to a pH of from about 2 to about 4; (ii) preparing a pigment dispersion in water, which dispersion is comprised of a pigment, an oppositely charged ionic surfactant and optionally charge control agent; (iii) shearing (i) and (ii), thereby causing a flocculation of the resin, pigment, surfactants, and optional charge control agent; (iv) heating the resulting flocculent mixture of (iii) with stirring at a temperature of from about 25.degree. C. to about 1.degree. C. below the glass transition temperature (Tg) of the imide resin to effect formation of electrostatically bounded toner sized aggregates, and wherein the imide resin has a Tg of from about 45.degree. C. to about 65.degree. C.; (v) heating the resulting aggregate suspension of (iv) in the presence of additional anionic surfactant selected in an amount of from about 0.01 to about 5 weight percent based on the weight percent of the total reaction mixture solids, and which heating is at a temperature of from about 10.degree. C. to about 55.degree. C. above the Tg of the imide resin; and optionally cooling, and optionally (vi) separating said toner by washing, and thereafter drying said toner.
    • 一种制备调色剂的方法,包括(i)将酰亚胺基树脂溶解在约10至约13的pH下,并且在非离子表面活性剂和阴离子表面活性剂存在下进行增溶; 然后将所得溶解的酰亚胺树脂沉淀成尺寸直径为约20纳米至约500纳米的胶体颗粒,并且以约500至约2000转/分钟的速度运行的高剪切装置完成沉淀; 将所得混合物酸化至约2至约4的pH; (ii)在水中制备颜料分散体,该分散体由颜料,相反电荷的离子表面活性剂和任选的电荷控制剂组成; (iii)剪切(i)和(ii),从而引起树脂,颜料,表面活性剂和任选的电荷控制剂的絮凝; (iv)在低于酰亚胺树脂的玻璃化转变温度(Tg)的约25℃至约1℃的温度下搅拌加热得到的(ⅲ)絮状混合物,以形成静电有界调色剂尺寸 聚集体,并且其中所述酰亚胺树脂的Tg为约45℃至约65℃。 (v)在所选择的另外的阴离子表面活性剂存在下加热得到的(iv)聚集体悬浮液,其量为总反应混合物固体的重量百分比为约0.01至约5重量%,加热为 温度高于酰亚胺树脂的Tg约10℃至约55℃; 并任选地冷却,并且任选地(vi)通过洗涤分离所述调色剂,然后干燥所述调色剂。