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    • 60. 发明授权
    • Toner aggregation processes
    • 调色剂聚合过程
    • US06210853B1
    • 2001-04-03
    • US09657340
    • 2000-09-07
    • Raj D. PatelMichael A. HopperEmily L. MooreGuerino G. Sacripante
    • Raj D. PatelMichael A. HopperEmily L. MooreGuerino G. Sacripante
    • G03G9087
    • G03G9/08708G03G9/0806G03G9/0819G03G9/08711G03G9/08755
    • A process for the preparation of toner including (i) gerating by emulsion polymerization in the presence of an initiator a first resin latex emulsion; (ii) generating by polycondensation a second resin latex optionally in the presence of a catalyst; (iib) dispersing the resin of (ii) in water; (iii) mixing (iib) with a colorant thereby providing a colorant dispersion; (iiib) mixing the resin latex emulsion of (i) with the resin/colorant mixture of (iii) to provide a blend of a resin and colorant; (iv) adding an aqueous inorganic cationic coagulant solution of a polymeric metal salt and optionally an organic cationic coagulant to the resin/colorant blend of (iiib); (v) heating at a temperature of from about 5 to about 10 degrees Centigrade below the resin Tg of (i), to thereby form aggregate particles and which particles are optionally at a pH of from about 2 to about 3.5; (vi) adjusting the pH of (v) to about 6.5 to about 9 by the addition of a base; (vii) heating the aggregate particles of (v) at a temperature of from about 5 to about 50 degrees Centigrade above the Tg of the resin of (i), followed by a reduction of the pH to from about 2.5 to about 5 by the addition of an acid resulting in coalesced toner; (viii) optionally isolating the toner.
    • 一种制备调色剂的方法,包括(i)在引发剂存在下通过乳液聚合第一树脂胶乳乳液; (ii)任选地在催化剂存在下通过缩聚产生第二树脂胶乳; (iib)将(ii)的树脂分散在水中; (iii)将混合(iib)与着色剂混合,从而提供着色剂分散体; (iiib)将(i)的树脂胶乳乳液与(iii)的树脂/着色剂混合物混合以提供树脂和着色剂的共混物; (iv)将聚合金属盐和任选的有机阳离子凝结剂的无机阳离子凝结剂水溶液加入到(iiib)的树脂/着色剂混合物中; (v)在(i)的树脂Tg以下约5至约10摄氏度的温度下加热,从而形成聚集体颗粒,并且哪些颗粒任选处于约2至约3.5的pH值; (vi)通过添加碱将(v)的pH调节至约6.5至约9; (vii)在(i)的树脂的Tg以上约5至约50摄氏度的温度下加热(ⅴ)的聚集体颗粒,随后将pH降低至约2.5至约5 加入导致聚结的调色剂的酸; (viii)任选地分离调色剂。