LUBRICATING AGENT FOR MAGNETIC DISK, AND MAGNETIC DISK

WIPO Patent Application WO/2011/010520

A1

Disclosed is a lubricating agent for magnetic disks, which has excellent heat resistance and is suitably used for a magnetic disk that is equipped in a magnetic recording apparatus that uses a thermally assisted magnetic recording system. Also disclosed is a magnetic disk which comprises a lubricating layer that contains the lubricating agent. Specifically disclosed is a lubricating agent for magnetic disks, which contains a compound wherein perfluoropolyether groups, each having a perfluoropolyether main chain in the structure and a phosphazene ring at an end, are bonded with each other by a linking group. The linking group is an aliphatic group or a phosphazene ring. Also specifically disclosed is a magnetic disk comprising at least a magnetic recording layer, a protective layer and a lubricating layer on a substrate, wherein the lubricating layer contains the above-described lubricating agent for magnetic disks.

WO/2018/139058	FLUORINE-CONTAINING ETHER COMPOUND, LUBRICANT FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
JPH08253873	LUBRICATING CHROMATING COMPOSITION FOR METALLIC MATERIAL AND TREATMENT
JPS60246022	PRODUCTION OF MAGNETIC RECORDING MEDIUM

SHIMOKAWA KOICHI (JP)
HAMAKUBO KATSUSHI (JP)

PCT/JP2010/060524

January 27, 2011

June 22, 2010

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WD MEDIA SINGAPORE PTE LTD (US)
SHIMOKAWA KOICHI (JP)
HAMAKUBO KATSUSHI (JP)

C10M107/38; C10M105/74; G11B5/725; G11B5/82; C10N20/04; C10N30/00; C10N30/06; C10N30/08; C10N40/18

WO2001021630A1

2001-03-29

JP2002275484A	2002-09-25
JP2002294266A	2002-10-09
JP2010006810A	2010-01-14

Takahashi, Hayashi and Partner Patent Attorneys, Inc. (JP)
Patent business corporation Takahashi and wood and partners (JP)

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