发明授权
US5744276A 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
- 专利标题： Toner for developing electrostatic image containing higher and lower molecular weight polymer components
- 专利标题（中）： 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
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申请号： US220044申请日： 1994-03-30
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公开(公告)号： US5744276A公开(公告)日： 1998-04-28
- 发明人: Manabu Ohno , Hiroyuki Suematsu , Akihiko Nakazawa , Nobuyuki Okubo , Shunji Suzuki
- 申请人： Manabu Ohno , Hiroyuki Suematsu , Akihiko Nakazawa , Nobuyuki Okubo , Shunji Suzuki
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX5-095005 19930331; JPX5-182205 19930629; JPX5-182206 19930629
- 主分类号： G03G9/08
- IPC分类号： G03G9/08 ; G03G9/087 ; G03G9/09 ; G03G9/097 ; G03G13/20
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.