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1. 发明授权

US4940606A Method of increasing the lubricant retention of magnetic disks 失效
标题翻译：增加磁盘润滑剂保留的方法
公开(公告)号：US4940606A
公开(公告)日：1990-07-10
申请号：US456758
申请日：1989-12-26
申请人： Heinz Hilgers , Rainer Morbitzer , Johannes Windeln
发明人： Heinz Hilgers , Rainer Morbitzer , Johannes Windeln
IPC分类号： G11B5/702 , G11B5/84 , G11B5/842
CPC分类号： G11B5/84 , G11B5/7028 , Y10S428/90
摘要： The invention concerns a method of increasing the lubricant retention of a magnetic layer, wherein a magnetic layer, containing magnetic particles dispersed in a curable organic binder system and organic solvents and an additive, is cured in a two-step process, wherein the magnetic layer, in a first step, is heated in an inert gas for a given time to a given temperature and, in a second step, in an inert gas to which oxygen has been added, for a given time to a given temperature. According to a preferred embodiment of the invention, the magnetic layer with polyvinyl methyl ether (PVME) as an additive is heated in nitrogen for 2.5 hours to 234.degree. C. and, after cooling down, in a nitrogen atmosphere containing 30 vol % oxygen for 60 minutes to 234.degree. C. In the first step, this kind of curing leads to polymerization of the binder and phase separation of PVME and in the second step of oxidation of PVME, forming a plurality of pores in the magnetic layer.
摘要翻译：本发明涉及增加磁性层的润滑剂保留性的方法，其中包含分散在可固化有机粘合剂体系中的磁性颗粒的磁性层和有机溶剂和添加剂在两步法中固化，其中磁性层在第一步骤中，在惰性气体中加热给定时间至给定温度，并且在第二步骤中，在已加入氧气的惰性气体中给定给定温度的给定时间。根据本发明的优选实施方案，将具有聚乙烯基甲基醚（PVME）作为添加剂的磁性层在氮气中加热2.5小时至234℃，并在冷却后在含有30体积％氧气的氮气氛中 60分钟至234℃。在第一步中，这种固化导致粘合剂的聚合和PVME的相分离，以及PVME氧化的第二步骤，在磁性层中形成多个孔。

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