发明授权
- 专利标题： Non-magnetic composite particles, process for producing the same and magnetic recording medium using the same
- 专利标题（中）： 非磁性复合颗粒，其制造方法和使用其的磁记录介质
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申请号： US09625404申请日： 2000-07-25
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公开(公告)号： US06544647B1公开(公告)日： 2003-04-08
- 发明人: Kazuyuki Hayashi , Keisuke Iwasaki , Hiroko Morii , Mineko Ohsugi
- 申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Hiroko Morii , Mineko Ohsugi
- 优先权： JP11-210321 19990726
- 主分类号： B32B530
- IPC分类号： B32B530
摘要：
Non-magnetic composite particles composed of non-magnetic core particles having an average particle size of 0.01 to 0.3 &mgr;m, and inorganic fine particles having an average particle size of 0.001 to 0.07 &mgr;m. The fine particles are present in an amount of 0.1 to 20% by weight based on the weight of the non-magnetic particles are on the surface of each non-magnetic particle, and are fixed or anchored on the surface of each non-magnetic particle through a silicon compound.The non-magnetic composite particles have a high polishing effect and a high dispersibility, and are useful as a non-magnetic undercoat layer for a magnetic recording medium.
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