GREASE COMPOSITION AND BEARINGS

The invention provides a grease composition which is capable of extending the bearing life even at elevated temperatures and has little effect on acrylic rubber; and a bearing in which the above-mentioned grease composition is packed. The grease composition contains a thickener and a base oil, the b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	AIDA, RYO, IMAI, JUNICHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BEARINGS BLASTING CHEMISTRY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS FUELS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MECHANICAL ENGINEERING METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS TECHNICAL GASES CONTAINING CARBON MONOXIDE THERMAL INSULATION IN GENERAL USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a grease composition which is capable of extending the bearing life even at elevated temperatures and has little effect on acrylic rubber; and a bearing in which the above-mentioned grease composition is packed. The grease composition contains a thickener and a base oil, the base oil including a synthetic hydrocarbon oil in an amount of 20 mass% or more of the total mass of the base oil and an ester-based oil in an amount of 20 mass% or less of the total mass of the base oil, and the thickener containing a diurea compound represented by formula (I): R 1 -NHCONH-R 2 -NHCONH-R 3 wherein R 2 is a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R 1 and R 3 may be the same or different and represent cyclohexyl group or a straight-chain or branched alkyl group having 8 to 18 carbon atoms, with the ratio of the number of moles of the cyclohexyl group to the total number of moles of R 1 and R 3 being 60 to 95%. The bearing has the above-mentioned grease composition sealed therein.