- 专利标题: Magnetic recording medium
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申请号: US09866091申请日: 2001-05-25
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公开(公告)号: US06623849B2公开(公告)日: 2003-09-23
- 发明人: Katsuhiko Meguro , Hiroshi Hashimoto
- 申请人: Katsuhiko Meguro , Hiroshi Hashimoto
- 优先权: JP2000-154623 20000525
- 主分类号: G11B5702
- IPC分类号: G11B5702
摘要:
A magnetic recording medium comprises: a support; an underlayer containing a non-magnetic powder and a binder; and at least one magnetic layer containing a binder and one of a ferromagnetic metal powder having an average major axis of 0.01 &mgr;m to 0.10 &mgr;m and a crystallite size of 80 Å to 180 Å and a ferromagnetic hexagonal ferrite powder having an average tabular diameter of 5 nm to 40 nm, wherein the magnetic layer has a thickness of 0.01 &mgr;m to 0.5 &mgr;m, and the binder in the magnetic layer comprises a (meth)acrylate copolymer having hydrophilic polar groups and comprising 0 to 75% by weight of alkyl (meth)acrylate units, 5 to 80% by weight of benzene ring-containing (meth)acrylate units and 1 to 75% by weight of nitrogen-containing radical polymerizable monomer units.
公开/授权文献
- US20020018914A1 Magnetic recording medium 公开/授权日:2002-02-14
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