发明名称 |
LUBRICANT FOR MAGNETIC DISK, PROCESS FOR PRODUCING THE SAME, AND MAGNETIC DISK |
摘要 |
<p>A lubricant for magnetic disks which can form a lubricating layer having a reduced thickness while attaining a high coverage and is excellent in heat resistance and adhesion to a protective layer. The lubricant for magnetic disks comprises a perfluoropolyether compound in which the relationship between the number-average molecular weight and the standardized value of the number of hydroxy groups contained in the molecule satisfies the following: the number-average molecular weight is in the range of 1,000-6,000; the standardized value of the number of hydroxy groups contained in the molecule is 180 or higher; and the compound is in a region located below the line connecting the point where the number-average molecular weight is 1,000 and the standardized value of the number of hydroxy groups in the molecule is 400 to the point where the number-average molecular weight is 6,000 and the standardized value of the number of hydroxy groups in the molecule is 1,600. The compound has at least one hydroxy group around the center of the molecular chain.</p> |
申请公布号 |
WO2008038799(A1) |
申请公布日期 |
2008.04.03 |
申请号 |
WO2007JP69088 |
申请日期 |
2007.09.28 |
申请人 |
HOYA CORPORATION;HAMAKUBO, KATSUSHI;SHIMOKAWA, KOICHI;SUZUKI, KOTA |
发明人 |
HAMAKUBO, KATSUSHI;SHIMOKAWA, KOICHI;SUZUKI, KOTA |
分类号 |
C10M171/00;C10M107/38;C10N30/00;C10N30/06;C10N40/18;C10N50/02;G11B5/725 |
主分类号 |
C10M171/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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