MAGNETIC DISC MEDIUM AND MAGNETIC DISC DRIVE

PROBLEM TO BE SOLVED: To provide a disc that has a thin protective film and is improved in abrasion resistance. SOLUTION: A lubricant is put on a magnetic disc and contains lublicity agents expressed by the following formulas 1 and 2. For this magnetic disc, the lubricant expressed by the formula 1...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAKAWAJI TAKAYUKI, SHODA MITSUHIRO, MATSUMOTO HIROYUKI, TANI KOUJI, SONODA KOJI, ISHIKAWA HIROSHI, OZAKI MICHINORI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FUELS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PHYSICS TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a disc that has a thin protective film and is improved in abrasion resistance. SOLUTION: A lubricant is put on a magnetic disc and contains lublicity agents expressed by the following formulas 1 and 2. For this magnetic disc, the lubricant expressed by the formula 1 is prepared so that 70 weight% or larger of it has a molecular weight of 1,500 or larger but 4,500 or smaller, 20 weight% or smaller has a molecular weight smaller than 1,500, and 10 weight% or smaller has the molecular weight of 4,500 or larger. Formula 1: HO(CH2CH2O)aCH2CF2(OC2F4)m(OCF2)nOCF2CH2(OCH2CH2)bOH, Formula 2: R1CH2CF2(OC2F4)p(OCF2)qOCF2CH2R2, a and b represent 1 and 2, respectively. COPYRIGHT: (C)2004,JPO