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101. 发明授权

US5032428A Method for producing a magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US5032428A
公开(公告)日：1991-07-16
申请号：US512228
申请日：1990-04-20
申请人： Hiroshi Ogawa , Shinji Saito , Hitoshi Noguchi
发明人： Hiroshi Ogawa , Shinji Saito , Hitoshi Noguchi
IPC分类号： G11B5/84 , B05D1/26 , B05D1/28 , G11B5/71 , G11B5/716 , G11B5/842
CPC分类号： G11B5/716 , G11B5/71 , Y10S428/90
摘要： A method for producing a magnetic recording medium is disclosed, comprising coating on a nonmagnetic support a magnetic coating composition for forming a lower magnetic layer and a magnetic coating composition for forming an upper magnetic layer using a wet-on-wet coating method, thereby forming plural magnetic layers, followed by drying, and then conducting heat treatment thereof, wherein the magnetic coating composition for the upper magnetic layer contains ferromagnetic alloy particles are ferromagnetic particles and does not contain a lubricating agent which has polar groups and has a molecular weight of 3000 or less, the magnetic coating composition for the lower magnetic layer contains ferromagnetic iron oxide particles as ferromagnetic particles, a lubricating agent having polar groups and having a molecular weight of 3000 or less, and a curing agent, the lubricating agent as well as the curing agent in the lower magnetic layer being diffused into the upper magnetic layer by the heat treatment.
摘要翻译：公开了一种制造磁记录介质的方法，其包括在非磁性载体上涂覆用于形成下磁性层的磁性涂料组合物和使用湿式湿式涂布法形成上层磁性层的磁性涂料组合物，由此形成多个磁性层，然后干燥，然后进行热处理，其中包含铁磁性合金颗粒的上磁性层的磁性涂层组合物是铁磁性颗粒，并且不含有具有极性基团并且分子量为3000的润滑剂以下的磁性涂料组合物含有作为铁磁性粒子的铁磁性氧化铁粒子，具有极性基团且分子量为3000以下的润滑剂，固化剂，润滑剂以及固化物下磁性层中的试剂通过该磁性层扩散到上磁性层中热处理。

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