发明授权
US5843610A Magnetic particles for magentic toner and process for producing the same
失效
用于磁性调色剂的磁性颗粒及其制备方法
- 专利标题： Magnetic particles for magentic toner and process for producing the same
- 专利标题（中）： 用于磁性调色剂的磁性颗粒及其制备方法
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申请号： US955104申请日： 1997-10-21
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公开(公告)号： US5843610A公开(公告)日： 1998-12-01
- 发明人: Naoki Uchida , Kazuo Fujioka , Koso Aoki , Hiromitsu Misawa , Minoru Kozawa
- 申请人： Naoki Uchida , Kazuo Fujioka , Koso Aoki , Hiromitsu Misawa , Minoru Kozawa
- 申请人地址： JPX
- 专利权人： Toda Kogyo Corporation
- 当前专利权人： Toda Kogyo Corporation
- 当前专利权人地址： JPX
- 优先权： JPX7-174202 19950615
- 主分类号： G03G9/083
- IPC分类号： G03G9/083
摘要：
A magnetic toner containing 100 parts by weight of magnetic Fe.sup.2+ -containing iron oxide particles having an average particle size of 0.05 to 0.30 .mu.m, containing not less than 0.9 atm % and less than 1.7 atm % of silicon, calculated as Si, based on Fe, having a substantially cubic shape each ridge of which has a curved surface, and having a ratio .phi. represented by the following formula of more than 1.0 and less than 1.4: .phi.=l/w wherein l represents an average maximum length of said Fe.sup.2+ -containing particles and w represents an average minimum length of said Fe.sup.2+ -containing particles, and 10 to 900 parts by weight of a toner resin.
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