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    • 17. 发明授权
    • Lubricant composition for magnetic recording media
    • 用于磁记录介质的润滑剂组合物
    • US07510999B2
    • 2009-03-31
    • US10856116
    • 2004-05-28
    • Hong DengRobert WaltmanJinliu Wang
    • Hong DengRobert WaltmanJinliu Wang
    • C10M137/16G11B5/725
    • G11B5/725C10M105/50C10M105/56C10M105/74C10M107/38C10M107/44C10M107/48C10M111/02C10M111/04C10M2213/0606C10M2215/041C10M2215/0425C10M2223/08C10N2240/204
    • A lubricant composition is provided comprising a first liquid lubricant and a second liquid lubricant, wherein the first liquid lubricant contains a cyclotriphosphazene ring attached to at least one perfluoropolyether having a single terminal hydroxyl group, and the second liquid lubricant contains a perfluoropolyether having two end groups selected from hydroxyl, tertiary amine, and combinations thereof. A magnetic recording media is also provided, comprising a substrate, a magnetic layer, an overcoat layer and a lubricant layer thereon, wherein the lubricant layer is formed from the lubricant composition. A further aspect of the invention concerns a method of making a magnetic recording media comprising forming a magnetic layer on a substrate; forming a protective overcoat layer on the magnetic layer; and forming a lubricant layer on the surface of the overcoat layer by applying the lubricant composition to the surface of the overcoat layer. The lubricant composition is useful for magnetic recording media, especially for magnetic storage hard disk drives, and provides improvements such as substantially reduced lubricant thickness variations when applied to a surface of a hard disk drive.
    • 提供一种润滑剂组合物,其包括第一液体润滑剂和第二液体润滑剂,其中所述第一液体润滑剂含有连接至至少一个具有单末端羟基的全氟聚醚的环三磷腈环,并且所述第二液体润滑剂含有具有两个端基的全氟聚醚 选自羟基,叔胺及其组合。 还提供了一种磁记录介质,其中包括基材,磁性层,外涂层和润滑剂层,其中润滑剂层由润滑剂组合物形成。 本发明的另一方面涉及一种制造磁记录介质的方法,包括在基底上形成磁性层; 在所述磁性层上形成保护性外涂层; 以及通过将润滑剂组合物施加到外涂层的表面,在外涂层的表面上形成润滑剂层。 润滑剂组合物可用于磁记录介质,特别是用于磁存储硬盘驱动器,并且提供改进,例如当应用于硬盘驱动器的表面时实质上减少的润滑剂厚度变化。
    • 19. 发明授权
    • Lubricant layer that provides a stable head-to-disk interface in humid conditions
    • 润滑层,在潮湿条件下提供稳定的磁头到磁盘接口
    • US08663822B2
    • 2014-03-04
    • US13252962
    • 2011-10-04
    • Yoshihiko OoedaYuzuru ShimazakiMina AmoYuichi AokiRobert Waltman
    • Yoshihiko OoedaYuzuru ShimazakiMina AmoYuichi AokiRobert Waltman
    • G11B5/66G11B5/82C07F9/06
    • G11B5/725
    • In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a lubricant layer above the protective layer, the lubricant layer including a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O—R2, wherein R1 and R2 are alkyl chains having at least two hydroxyl groups each, and m is an integer indicating a number of repeating units. According to another embodiment, a magnetic disk medium lubricant includes a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated as above, such that a magnetic head is provided stable flight above the lubricant layer in conditions having relative humidity of greater than about 40%.
    • 在一个实施例中,磁盘介质包括非磁性衬底,非磁性衬底上的磁记录层,磁记录层上方的保护层和保护层上方的润滑层,润滑层包括具有 一种或多种环磷腈基团和润滑剂配制为R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O-R2,其中R1和R2分别是具有至少两个羟基的烷基链,m是表示重复单元数的整数。 根据另一个实施方案,磁盘介质润滑剂包括具有一个或多个环磷腈基团的化合物和如上所述配制的润滑剂的混合物,使得磁头在相对湿度大于的条件下在润滑剂层上方提供稳定的飞行 约40%。
    • 20. 发明申请
    • LUBRICANT LAYER THAT PROVIDES A STABLE HEAD-TO-DISK INTERFACE IN HUMID CONDITIONS
    • 在湿度条件下提供稳定的头盘式接口的润滑剂层
    • US20130083422A1
    • 2013-04-04
    • US13252962
    • 2011-10-04
    • Yoshihiko OoedaYuzuru ShimazakiMina AmoYuichi AokiRobert Waltman
    • Yoshihiko OoedaYuzuru ShimazakiMina AmoYuichi AokiRobert Waltman
    • G11B21/02G11B5/62G11B5/65
    • G11B5/725
    • In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a lubricant layer above the protective layer, the lubricant layer including a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O—R2, wherein R1 and R2 are alkyl chains having at least two hydroxyl groups each, and m is an integer indicating a number of repeating units. According to another embodiment, a magnetic disk medium lubricant includes a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated as above, such that a magnetic head is provided stable flight above the lubricant layer in conditions having relative humidity of greater than about 40%.
    • 在一个实施例中,磁盘介质包括非磁性衬底,非磁性衬底上的磁记录层,磁记录层上方的保护层和保护层上方的润滑层,润滑层包括具有 一种或多种环磷腈基团和润滑剂配制为R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O-R2,其中R1和R2分别是具有至少两个羟基的烷基链,m是表示重复单元数的整数。 根据另一个实施方案,磁盘介质润滑剂包括具有一个或多个环磷腈基团的化合物和如上所述配制的润滑剂的混合物,使得磁头在相对湿度大于的条件下在润滑剂层上方提供稳定的飞行 约40%。