发明公开
- 专利标题： Black magnetic iron oxide particles and magnetic toner
- 专利标题（中）： 黑色磁性色粉和磁性Eisenoxydteilchen
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申请号： EP02250422.9申请日： 2002-01-22
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公开(公告)号： EP1225600A3公开(公告)日： 2003-08-06
- 发明人: Uchida, Naoki , Kouzawa, Minoru , Misawa, Hiromitsu , Aoki, Koso , Miura, Suehiko
- 申请人： Toda Kogyo Corporation
- 申请人地址： 1-2, Funairiminami 4-chome, Naka-ku Hiroshima-shi, Hiroshima-ken JP
- 专利权人： Toda Kogyo Corporation
- 当前专利权人： Toda Kogyo Corporation
- 当前专利权人地址： 1-2, Funairiminami 4-chome, Naka-ku Hiroshima-shi, Hiroshima-ken JP
- 代理机构： Woods, Geoffrey Corlett
- 优先权： JP2001015115 20010123
- 主分类号： H01F1/11
- IPC分类号： H01F1/11 ; G03G9/083 ; C09C1/24
摘要：
Black magnetic iron oxide particles having a three-phase structure comprising: a core portion containing at least one metal element other than Fe selected from Mn, Zn, Cu, Ni, Cr, Cd, Sn, Mg, Ti, Ca and Al in an amount of from 0.1 to 10% by weight based on whole Fe contained in the particles; a surface coat portion containing at least one metal element other than Fe selected from Mn, Zn, Cu, Ni, Cr, Cd, Sn, Mg, Ti, Ca arid Al in an amount of from 0.1 to 10% by weight based on whole Fe contained in the particles; and an intermediate layer disposed between the core portion and the surface coat portion, containing substantially none of the metal elements other than Fe, and having an average particle diameter of from 0.05 to 1.0 µm.
公开/授权文献
- EP1225600B1 Black magnetic iron oxide particles and magnetic toner 公开/授权日：2007-03-07
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