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    • 4. 发明授权
    • Toner for developing electrostatic images
    • 用于显影静电图像的调色剂
    • US5364719A
    • 1994-11-15
    • US23857
    • 1993-02-24
    • Hideki OhtaTatsuo ImafukuMasami TsujihiroToshiro TokunoHiroshi ShimoyamaNobuhiro Hirano
    • Hideki OhtaTatsuo ImafukuMasami TsujihiroToshiro TokunoHiroshi ShimoyamaNobuhiro Hirano
    • G03G9/097G03G9/08G03G9/087G03G9/09
    • G03G9/08706G03G9/0825G03G9/08708G03G9/08711G03G9/08726G03G9/08791Y10S430/105
    • Toner for developing electrostatic images contains at least a colorant and a charge control dye in a binding resin which is the main component thereof, the toner having a surface dye density of less than 5.times.10.sup.-3 g/g and containing a monomer having a charge control polar group within the range of 0.01 to 5 weight percent based on the weight of the toner. The binding resin is preferably formed from at least one kind of monomer selected from a group consisting of vinyl aromatic monomers, acrylic type monomers, vinyl ester type monomers, vinyl ether type monomers, diolefin type monomers and monoolefin type monomers, and further preferably from at least one kind of monomer selected from a group consisting of styrene, ester acrylate and ester methacrylate. Also, the binding resin may be formed from at least one kind of monomer selected from a group consisting of polyester, phenol and epoxy resins. It is desirable that the colorant be used in 0.1 to 50 parts by weight for every 100 parts by weight of the polymerizable monomer. A magnetic pigment may also be used in addition to or instead of the colorant. In this case, it is desirable that the magnetic pigment be used in 1 to 200 parts by weight, and preferably in 5 to 100 parts by weight, for every 100 parts by weight of the polymerizable monomer.
    • 用于显影静电图像的调色剂在作为其主要成分的粘合树脂中至少含有着色剂和电荷控制染料,调色剂具有小于5×10 -3 g / g的表面染料密度并且含有具有电荷控制的单体 极性基团在0.01至5重量%的范围内,基于调色剂的重量。 粘合树脂优选由选自乙烯基芳族单体,丙烯酸类单体,乙烯基酯型单体,乙烯基醚型单体,二烯烃型单体和单烯烃型单体中的至少一种单体形成,进一步优选由 选自苯乙烯,丙烯酸酯和甲基丙烯酸酯的至少一种单体。 此外,粘结树脂可以由选自聚酯,苯酚和环氧树脂中的至少一种单体形成。 对于每100重量份的聚合性单体,着色剂的使用量优选为0.1〜50重量份。 除了着色剂之外或替代着色剂,也可以使用磁性颜料。 在这种情况下,对于每100重量份的聚合性单体,磁性颜料的使用量优选为1〜200重量份,优选为5〜100重量份。
    • 9. 发明授权
    • Method of manufacturing a toner
    • 调色剂的制造方法
    • US5364728A
    • 1994-11-15
    • US996858
    • 1992-12-21
    • Hideki OhtaTatsuo ImafukuMasami TsujihiroToshiro TokunoHiroshi ShimoyamaNobuhiro Hirano
    • Hideki OhtaTatsuo ImafukuMasami TsujihiroToshiro TokunoHiroshi ShimoyamaNobuhiro Hirano
    • G03G9/08G03G9/087G03G9/09
    • G03G9/0823G03G9/0806G03G9/0827G03G9/0904
    • Spheroidal toner for developing electrostatic images is composed of a binding resin as its main component in which at least carbon black and a dispersion stabilizer for the carbon black are contained, the conductivity of the toner being in the range of 5.times.10.sup.-11 to 5.times.10.sup.-9 S/cm. The conductivity of the toner is preferably within the range of 4.times.10.sup.-10 to 5.times.10.sup.-9 S/cm. It is also desirable that the dispersion stabilizer be composed of at least one selected from the group consisting of oil-soluble dyes, coupling agents, and surfactants, and that according to Wadel's practical spheroidicity, the toner be within the range of 0.95 to 1.0. A method of manufacturing the toner includes the steps of: forming grafted carbon black by prepolymerization of a polymerizable composition containing carbon black and a monomer forming a binding resin; adding a carbon black dispersion stabilizer to the prepolymerized composition; and suspending the composition in an aqueous medium and polymerizing the suspended particles in the presence of a polymerization initiator.
    • 用于显影静电图像的球形调色剂由粘合树脂作为其主要成分组成,其中至少含有炭黑和用于炭黑的分散稳定剂,调色剂的电导率在5×10-11至5×10-9的范围内 S / cm。 调色剂的电导率优选在4×10 -10至5×10 -9 S / cm 3的范围内。 还期望分散稳定剂由选自油溶性染料,偶联剂和表面活性剂中的至少一种组成,并且根据Wadel的实际球形度,调色剂在0.95至1.0的范围内。 制造调色剂的方法包括以下步骤:通过预聚合含有炭黑的聚合性组合物和形成粘合树脂的单体形成接枝炭黑; 向预聚合的组合物中加入炭黑分散体稳定剂; 并将组合物悬浮在水性介质中并在聚合引发剂的存在下使悬浮颗粒聚合。