Method to refine lubricant for a magnetic recording medium
    121.
    发明申请
    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:US20040092406A1

    公开(公告)日:2004-05-13

    申请号:US10620773

    申请日:2003-07-17

    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。

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