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    • 1. 发明授权
    • Toner for developing latent electrostatic images
    • 用于显影静电潜像的调色剂
    • US4950573A
    • 1990-08-21
    • US121483
    • 1987-11-17
    • Kimitoshi YamaguchiKazuhiko UmemuraYoshihiro Nomura
    • Kimitoshi YamaguchiKazuhiko UmemuraYoshihiro Nomura
    • G03G9/08G03G9/087
    • G03G9/0825G03G9/08751G03G9/08773
    • A toner for developing latent electrostatic images is disclosed, which comprises (a) thermofusible base particles A having a softening point of 80.degree. C. or less, a flow starting temperature of 110.degree. C. or less, and an average particle size of 5 to 25 .mu.m, and (b) small particles B comprising as the main component an organic polymeric material having a softening point at least 5.degree. C. higher than the softening point of the base particles A and no practical softening point, and an average particle size ranging from 0.1 .mu.m or more, but not more than 1/4 of the average particle size of the base particles A, which small particles B are embedded in the surface of the base particles A so as to cover the surface of the base particles A to a depth of less than the particle size of the small particles B.
    • 公开了用于显影静电图像的调色剂,其包含(a)软化点为80℃或更低,流动起始温度为110℃或更低,平均粒度为5的热熔性基础颗粒A 至(b)作为主要成分的小粒子B,其含有软化点比基础粒子A的软化点高5℃以上的有机聚合物,没有实用的软化点,平均粒径 粒径为0.1μm以上且不超过基体颗粒A的平均粒径的1/4,该颗粒B被嵌入基体颗粒A的表面,以覆盖基体颗粒A的表面 基础颗粒A的深度小于小颗粒B的粒度。
    • 5. 发明授权
    • Toner for forming electrophotographic image and developers using the same
    • 用于形成电子照相图像的调色剂和使用它的显影剂
    • US5705306A
    • 1998-01-06
    • US645126
    • 1996-05-13
    • Ryuji KitaniMeizo ShiroseTatsuya NagaseKeiko UjiharaMichiaki Ishikawa
    • Ryuji KitaniMeizo ShiroseTatsuya NagaseKeiko UjiharaMichiaki Ishikawa
    • G03G9/087G03G9/09G03G9/097G03G9/113
    • G03G9/09G03G9/08751G03G9/09708G03G9/1133
    • A toner for forming an electrophotographic image is disclosed. The toner comprises (1) colored particles comprising a resin and a colorant, (2) fine resin particles comprising a polymer formed by condensation of melamine and formaldehyde, and have a volume average diameter of 0.01 .mu.m to 1.0 .mu.m, and (3) fine particles of an inorganic material (I) having a volume average diameter of 0.01 .mu.m to 0.20 .mu.m and a standard deviation of distribution of the volume average diameter G satisfying the condition of 10.ltoreq..sigma..ltoreq.30. It is particularly preferred that the toner is used as a tow componet developer together with a negatively chargeable carrier which comprises (1) magnetic core particles each coated with a coating layer comprising a mixture of homopolymer of an alicyclic methacrylate monomer and a homopolymer of an acyclic methacrylate monomer, or a copolymer of an alicyclic methacrylate monomer and an acyclic methacrylate monomer, and (2) a fine particles of an inorganic material (II).
    • 公开了一种用于形成电子照相图像的调色剂。 调色剂包括(1)包含树脂和着色剂的着色颗粒,(2)包含由三聚氰胺和甲醛缩合形成的聚合物的细树脂颗粒,体积平均直径为0.01μm至1.0μm,和(3 )体积平均直径为0.01μm至0.20μm的无机材料(I)的细颗粒和满足条件为10≤Δ≤30的体积平均直径G的分布的标准偏差。 特别优选的是,调色剂与负电荷载体一起用作丝束组分显影剂,其包含(1)各自涂覆有包含脂环族甲基丙烯酸酯单体的均聚物和非环状的均聚物的混合物的涂层的磁芯颗粒 甲基丙烯酸酯单体或脂环族甲基丙烯酸酯单体和无环状甲基丙烯酸酯单体的共聚物,(2)无机材料(II)的微粒。
    • 6. 发明授权
    • Electrophotographic toner
    • 电子照相墨粉
    • US07723001B2
    • 2010-05-25
    • US11878214
    • 2007-07-23
    • Sang-woo Kim
    • Sang-woo Kim
    • G03G9/00
    • G03G9/09725G03G9/08728G03G9/08751G03G9/09708G03G9/09716G03G9/09733
    • An electrophotographic toner includes toner parent particles containing a binder resin, a colorant and a charge control agent; and an external additive added to the surface of the toner parent particles. The toner further includes positively chargeable silica and polymer beads in addition to large particle diameter silica, small particle diameter silica and titanium oxides. Thus, the toner can maintain its charge quantity and distribution stably even during environmental changes and after long image printing times, thereby preventing the contamination of the non-image part and the filming.
    • 电子照相调色剂包括含有粘合剂树脂,着色剂和电荷控制剂的调色剂母体颗粒; 以及添加到调色剂母体颗粒表面的外部添加剂。 除了大粒径二氧化硅,小粒径二氧化硅和氧化钛之外,调色剂还包括可带正电的二氧化硅和聚合物珠。 因此,即使在环境变化和长时间的图像打印时间后,调色剂也可以保持其电荷量和分布,从而防止非图像部分的污染和成膜。