Magnetic developer for developing electrostatic images
    41.
    发明授权
    Magnetic developer for developing electrostatic images 失效
    磁性显影剂用于静电图像显影

    公开(公告)号:US5364720A

    公开(公告)日:1994-11-15

    申请号:US135974

    申请日:1993-10-14

    IPC分类号: G03G9/083 G03G9/087

    摘要: A magnetic developer for developing electrostatic images is constituted by magnetic toner particles, each containing a binder resin having a melt viscosity of at most 5.0.times.10.sup.6 poise at 150.degree. C. and a magnetic material. The magnetic material is blended with a proportion (C) [wt. %] of inorganic fine particles based on the magnetic material to carry 0.2-5 wt. % of the inorganic fine particles secured to the magnetic material surface. The magnetic material has a specific surface area (A) [m.sup.2 /g] before securing of the inorganic fine particles and is provided with an increase in surface area (B) [m.sup.2 /g] by the securing of the inorganic fine particles; wherein the parameters A, B and C satisfy the following formulae (1) and (2):0.1.ltoreq.B/A.ltoreq.0.8 (1)B

    摘要翻译: 用于显影静电图像的磁性显影剂由磁性调色剂颗粒构成,每个磁性调色剂颗粒含有在150℃下熔体粘度至多为5.0×10 6泊的粘合剂树脂和磁性材料。 将磁性材料与(C)[wt。 %]基于磁性材料的无机细颗粒携带0.2-5重量% %的无机细颗粒固定在磁性材料表面上。 磁性材料在固定无机细颗粒之前具有比表面积(A)[m2 / g],并且通过确保无机细颗粒而使表面积(B)[M2 / g]增加。 其中参数A,B和C满足下列公式(1)和(2):0.1

    Toner for developing electrostatic image containing higher and lower
molecular weight polymer components
    42.
    发明授权
    Toner for developing electrostatic image containing higher and lower molecular weight polymer components 失效
    用于显影含有较高和较低分子量聚合物组分的静电图像的调色剂

    公开(公告)号:US5744276A

    公开(公告)日:1998-04-28

    申请号:US220044

    申请日:1994-03-30

    摘要: An electrophotographic toner composition suitable for heat-fixation and showing good storage characteristics is constituted by polymer components, a colorant and a metal-containing organic compound. The toner composition shows a melt index (at 125.degree. C., 10 kg-load) of 5-25 g/10 min., and the polymer components are characterized by (a) containing substantially no THF (tetrahydrofuran)-insoluble content, (b) including a THF-soluble content thereof providing a GPC (gel permeation chromatography) chromatogram showing i) a main peak in a molecular weight region of 2.times.10.sup.3 -3.times.10.sup.4, and a sub-peak or shoulder in a molecular weight region of at least 10.sup.5, and ii) an areal percentage of 3-10% in a molecular weight region of at least 10.sup.6, and (c) including a polymer component (H) in a molecular weight region of at least 10.sup.5 obtained by polymerization using a polyfunctional polymerization initiator and a monofunctional polymerization initiator.

    摘要翻译: 适合于热定影和显示良好储存特性的电子照相调色剂组合物由聚合物组分,着色剂和含金属的有机化合物构成。 调色剂组合物显示5-25g / 10min的熔融指数(125℃,10kg负载),聚合物组分的特征在于(a)基本上不含THF(四氢呋喃) - 不溶物含量, (b)包括其可溶于THF的含量,提供GPC(凝胶渗透色谱)色谱图,其显示i)分子量区域中的主峰为2×103-3×104,以及至少分子量区域中的亚峰或肩峰 105,和ii)分子量区域中至少为106的3-10%的面积百分比,和(c)包括通过使用多官能聚合的聚合获得的至少105的分子量区域中的聚合物组分(H) 引发剂和单官能聚合引发剂。