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1. WO2013054393 - LUBRICANT AND MAGNETIC DISK DEVICE USING SAME

Publication Number WO/2013/054393
Publication Date 18.04.2013
International Application No. PCT/JP2011/073335
International Filing Date 11.10.2011
IPC
G11B 5/725 2006.1
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
72Protective coatings, e.g. anti-static
725containing a lubricant
C10M 147/04 2006.1
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
147Lubricating compositions characterised by the additive being a macromolecular compound containing halogen
04Monomer containing carbon, hydrogen, halogen and oxygen
CPC
C10M 107/38
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS
107Lubricating compositions characterised by the base-material being a macromolecular compound
38containing halogen
C10M 147/04
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS
147Lubricating compositions characterised by the additive being a macromolecular compound containing halogen
04Monomer containing carbon, hydrogen, halogen and oxygen
C10M 2213/04
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS
2213Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
04obtained from monomers containing carbon, hydrogen, halogen and oxygen
C10M 2213/043
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
MLUBRICATING COMPOSITIONS
2213Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
04obtained from monomers containing carbon, hydrogen, halogen and oxygen
043used as base material
C10N 2040/18
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
2040Specified use or application for which the lubricating composition is intended
14Electric or magnetic purposes
18in connection with recordings on magnetic tape or disc
G11B 5/7257
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
72Protective coatings, e.g. anti-static ; or antifriction
725containing a lubricant ; , e.g. organic compounds
7253Fluorocarbon lubricant
7257Perfluoropolyether lubricant
Applicants
  • 株式会社日立製作所 HITACHI, LTD. [JP]/[JP] (AllExceptUS)
  • 斎藤 洋子 SAITO Yoko [JP]/[JP] (UsOnly)
  • 天羽 美奈 AMO Mina [JP]/[JP] (UsOnly)
Inventors
  • 斎藤 洋子 SAITO Yoko
  • 天羽 美奈 AMO Mina
Agents
  • 平木祐輔 HIRAKI Yusuke
Priority Data
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) LUBRICANT AND MAGNETIC DISK DEVICE USING SAME
(FR) LUBRIFIANT ET DISPOSITIF À DISQUE MAGNÉTIQUE L'UTILISANT
(JA) 潤滑剤、及びそれを用いた磁気ディスク装置
Abstract
(EN) The purpose of the present invention is to provide: a lubricant which enables long-term stabilization of a head-disk interface by means of a lubricant structure wherein the bulk of the polymer of the lubricant is decreased, while maintaining the fluidity as the lubricant; and a magnetic disk device which uses the lubricant. A lubricant of the present invention is a polymer having two or more polar groups, and is characterized in that a monomer unit having an oxygen/carbon ratio of less than 1/2 and a monomer unit having an oxygen/carbon ratio of 1/2 or more, one or more side chains selected from among -(CH2)p-CH3, -O-(CH2)p-CH3 and -(CH2O)p-CH3 (wherein p represents an integer of 0 or more, and one or more hydrogen atoms may be substituted by fluorine atoms), or one or more alicyclic hydrocarbon groups are contained at least between two of the polar groups of the polymer.
(FR) La présente invention a pour but de proposer: un lubrifiant qui permet une stabilisation à long terme d'une interface tête-disque au moyen d'une structure de lubrifiant, l'encombrement du polymère du lubrifiant étant diminué, tout en conservant la fluidité comme lubrifiant ; et un dispositif à disque magnétique qui utilise le lubrifiant. Un lubrifiant de la présente invention est un polymère ayant au moins deux groupes polaires et qui est caractérisé en ce qu'une unité monomère ayant un rapport oxygène/carbone de moins de 1/2 et une unité monomère ayant un rapport oxygène/carbone de 1/2 ou plus, une ou plusieurs chaînes latérales choisies parmi -(CH2)p-CH3, -O-(CH2)p-CH3 et -(CH2O)p-CH3 (p représentant un entier de 0 ou plus et un ou plusieurs atomes d'hydrogène pouvant être substitués par des atomes de fluor) ou un ou plusieurs groupes hydrocarbonés alicycliques sont contenus au moins entre deux des groupes polaires du polymère.
(JA)  潤滑剤の高分子の嵩高さを小さくしつつ、潤滑剤としての流動性が保持された潤滑剤構造を提案し、長期にわたるヘッド・ディスク界面の安定化を実現する潤滑剤、及びそれを用いた磁気ディスク装置を提供することを目的とする。 本発明の潤滑剤は、2つ以上の極性基を有する高分子であって、そのうち少なくとも2つの極性基の間が、酸素/炭素比で1/2未満のモノマー単位及び酸素/炭素比で1/2以上のモノマー単位を含むか、-(CH-CH、-O-(CH-CH及び-(CHO)-CH(式中、pは0以上の整数であり、1以上の水素原子はフッ素原子に置換されていても良い)から選択される一種以上の側鎖を含むか、あるいは1以上の脂環式炭化水素基を含むことを特徴とする。
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