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    Method to refine lubricant for a magnetic recording medium
    63.
    发明授权
    Method to refine lubricant for a magnetic recording medium 有权
    改善磁记录介质润滑剂的方法

    公开(公告)号：US07199087B2

    公开(公告)日：2007-04-03

    申请号：US10620773

    申请日：2003-07-17

    Applicant: Yoshihito Osawa ,  Shinji Shirai ,  Masayuki Ishkawa

    Inventor： Yoshihito Osawa ,  Shinji Shirai ,  Masayuki Ishkawa

    IPC: C10M15/54 ,  C10M175/00 ,  G11B5/725

    CPC classification number: C10M175/005 ,  C08G65/007 ,  C08G65/30 ,  C08G65/46 ,  C10M2201/16 ,  C10M2213/062 ,  C10N2240/204 ,  G11B5/725 ,  Y02P20/544

    Abstract: A method refines a lubricant comprising a compound having a perfluoropolyether structure via supercritical extraction. A lubricant is refined using the method and a magnetic recording medium that utilizes the refined lubricant. The refined lubricant exhibits excellent lubrication performance and long term stability in the magnetic recording medium. In one embodiment of the supercritical extraction, the lubricant contacts an extracting medium of supercritical carbon dioxide under a predetermined condition in a pressure vessel to remove ionic impurities and perfluoropolyether compounds having a weak polarity terminal group contained in the lubricant.

    Abstract translation: 一种方法通过超临界萃取来提炼含有具有全氟聚醚结构的化合物的润滑剂。 使用该方法精炼润滑剂和利用精制润滑剂的磁记录介质。 精炼润滑剂在磁记录介质中表现出优异的润滑性能和长期稳定性。 在超临界萃取的一个实施方案中，润滑剂在预定条件下在压力容器中与超临界二氧化碳的萃取介质接触以除去润滑剂中含有的极性极性极弱的离子杂质和全氟聚醚化合物。

    Thermally stable perfluoropolyethers and processes therefor and therewith
    66.
    发明申请
    Thermally stable perfluoropolyethers and processes therefor and therewith 有权
    热稳定的全氟聚醚及其工艺及其

    公开(公告)号：US20030027732A1

    公开(公告)日：2003-02-06

    申请号：US09901975

    申请日：2001-07-10

    Inventor： Jon L. Howell ,  Erik William Perez ,  Alfred Waterfeld ,  Chadron Mark Friesen ,  Joseph Stuart Thrasher

    IPC: C10M101/00

    CPC classification number: C10M169/06 ,  C10M107/38 ,  C10M113/00 ,  C10M113/12 ,  C10M119/22 ,  C10M147/04 ,  C10M169/02 ,  C10M2201/00 ,  C10M2201/061 ,  C10M2201/0616 ,  C10M2201/105 ,  C10M2201/1056 ,  C10M2201/16 ,  C10M2201/18 ,  C10M2211/06 ,  C10M2213/00 ,  C10M2213/02 ,  C10M2213/023 ,  C10M2213/04 ,  C10M2213/043 ,  C10M2213/06 ,  C10M2213/0606 ,  C10M2213/0613 ,  C10M2213/062 ,  C10M2213/0623 ,  C10M2213/0626 ,  C10N2230/08 ,  C10N2240/12 ,  C10N2240/121 ,  C10N2250/10 ,  C10N2270/00

    Abstract: A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups. The process for producing the perfluoropolyether can comprise (1) contacting a perfluoro acid halide, a C2- to C4-substituted ethyl epoxide, or a C3null fluoroketone with a metal halide to produce an alkoxide; (2) contacting the alkoxide with either hexafluoropropylene oxide or tetrafluorooxetane to produce a second acid halide; (3) esterifying the second acid halide to an ester; (4) reducing the ester to its corresponding alcohol; (5) converting the alcohol with a base to a salt form; (6) contacting the salt form with a C3 or higher olefin to produce a fluoropolyether; and (7) fluorinating the fluoropolyether. The process for improving the thermostability of a grease or lubricant comprises combining the grease or lubricant with the composition.

    Abstract translation: 提供全氟聚醚，包含全氟聚醚的组合物，制备全氟聚醚的方法以及改善润滑脂或润滑剂的热稳定性的方法。 全氟聚醚包括全氟烷基自由基端基，其中基团每个基团具有至少3个碳原子，并且基本上不含全氟甲基和全氟乙基端基。 制备全氟聚醚的方法可以包括（1）使全氟酰卤，C 2 -C 4取代的乙基环氧化物或C 3+氟代酮与金属卤化物接触以产生醇盐; （2）使醇盐与六氟环氧丙烷或四氟氧杂环丁烷接触以产生第二种酰卤; （3）将第二酰卤酯化为酯; （4）将酯还原成相应的醇; （5）将醇与碱转化为盐形式; （6）使盐形式与C3或更高级烯烃接触以产生含氟聚醚; 和（7）氟化聚醚醚。 用于改善润滑脂或润滑剂的热稳定性的方法包括将润滑脂或润滑剂与组合物组合。

    Lubricant for refrigerators using ammonia refrigerant
    68.
    发明授权
    Lubricant for refrigerators using ammonia refrigerant 有权
    使用氨制冷剂的冰箱的润滑剂

    公开(公告)号：US06335311B1

    公开(公告)日：2002-01-01

    申请号：US09508961

    申请日：2000-03-20

    Applicant: Masato Namiki ,  Goro Yamamoto ,  Takashi Kaimai ,  Hitoshi Takahashi

    Inventor： Masato Namiki ,  Goro Yamamoto ,  Takashi Kaimai ,  Hitoshi Takahashi

    IPC: C10M14526

    CPC classification number: C10M171/008 ,  C10M107/34 ,  C10M2201/00 ,  C10M2201/061 ,  C10M2201/16 ,  C10M2201/18 ,  C10M2209/107 ,  C10N2220/02 ,  C10N2240/00 ,  C10N2240/22 ,  C10N2240/30 ,  C10N2240/50 ,  C10N2240/52 ,  C10N2240/54 ,  C10N2240/56 ,  C10N2240/58 ,  C10N2240/60 ,  C10N2240/66

    Abstract: To provide a polyalkylene glycol-based refrigerant oil for refrigerators using ammonia as a refrigerant. The present invention provides a lubricant for refrigerators using ammonia refrigerant, comprising polyethers selected from the group consisting of a polyether represented by the following general formula (1) X—{—O—(AO)n—H}p  (1) (wherein X is a residue of a monool or polyol from which a hydroxyl group is eliminated; (AO)n is a polyoxyalkylene group formed by copolymerization of EO and an AO having 3 or more carbon atoms; n is 2 or more; and p is a valence of X) and having 50% or more of secondary hydroxyl groups among the hydroxyl groups located at the terminal of the structure based on the total hydroxyl groups, or a polyether represented by the following general formula (2) X—{—O—(AO1)a—(AO2)b—H}p  (2) (wherein X is a residue of a monool or polyol from which a hydroxyl group is eliminated; (AO1)n is a polyoxyalkylene group formed by copolymerization of ethylene oxide and propylene oxide and/or butylene oxide; AO2 is an oxyalkylene group having 3 or more carbon atoms; a is 2 or more; b is 1 or more; and p is a valence of X).

    Abstract translation: 提供一种使用氨作为制冷剂的制冷剂的聚亚烷基二醇系冷冻机油。本发明提供一种使用氨制冷剂的制冷机的润滑剂，其包含选自下述通式（1）表示的聚醚的聚醚（其中， X是除去羟基的一元醇或多元醇的残基;（AO）n是通过EO和具有3个或更多个碳原子的AO的共聚形成的聚氧化烯基; n是2以上; p是 X的化合价），并且在基于全部羟基的结构的末端的羟基中具有50％以上的仲羟基，或由以下通式（2）表示的聚醚（其中X为残基 的一元醇或多元醇，其中羟基被除去;（AO1）n是通过环氧乙烷和环氧丙烷和/或环氧丁烷的共聚形成的聚氧化烯基团; AO2是氧化烯 具有3个以上碳原子的基团; a是2以上; b为1以上; 并且p是X的化合价）。

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