发明授权
- 专利标题: Magnetic recording medium containing specific binder in the magnetic layer and the lower non-magnetic layer
- 专利标题(中): 在磁性层和下部非磁性层中含有特定粘结剂的磁记录介质
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申请号: US09988453申请日: 2001-11-16
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公开(公告)号: US06686073B2公开(公告)日: 2004-02-03
- 发明人: Katsuhiko Meguro , Hiroshi Hashimoto , Yuichiro Murayama
- 申请人: Katsuhiko Meguro , Hiroshi Hashimoto , Yuichiro Murayama
- 优先权: JPP.2000-349680 20001116; JPP.2001-058349 20010302
- 主分类号: B32B516
- IPC分类号: B32B516
摘要:
A magnetic recording medium containing a support having provided thereon a lower layer containing a nonmagnetic powder and a binder and further provided thereon at least one magnetic layer containing a ferromagnetic powder and a binder. The lower layer can contain as a binder at least a monomer unit containing from 5 to 45% by weight of a (meth)acrylate unit containing a benzene ring and from 1 to 45% by weight of a radical polymerizable monomer unit containing a nitrogen atom, with these units making a total amount of 100% by weight. It can also contain an acrylic resin having a hydrophilic polar group. The magnetic recording medium may also contain a support having provided thereon at least one magnetic layer containing a ferromagnetic powder and a binder each in the dispersed state. The magnetic layer can contain at least a monomer unit comprising from 15 to 75% by weight of an alkyl (meth)acrylate as a binder and from 1 to 45% by weight of a radical polymerizable monomer unit containing nitrogen, with these units making a total amount of 100% by weight. It can also contain an acrylic resin having a hydrophilic polar group used in combination with a resin (A) defined herein; a resin (B) defined herein; or a resin (C) defined herein.
公开/授权文献
- US20020090535A1 Magnetic recording medium 公开/授权日:2002-07-11
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