Waterproof grease composition and roller bearing for wheel support

The waterproof grease composition of the present application comprises a base oil that comprises at least one of mineral oil and synthetic oil and having a kinematic viscosity of from 10 to 400 mm 2 /sec at 40 DEG C, a thickener, and a waterproofness-imparting agent selected from surfactant, metal s...

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Bibliographische Detailangaben
1. Verfasser:	NAKATANI SHINYA,KURAISHI JUN,MATSUMOTO TOMOAKI
Format:	Patent
Sprache:	eng
Schlagworte:	AXLES FOR WHEELS OR CASTORS BEARINGS BLASTING CASTORS CHEMISTRY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS FUELS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INCREASING WHEEL ADHESION LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS MECHANICAL ENGINEERING METALLURGY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS TECHNICAL GASES CONTAINING CARBON MONOXIDE THERMAL INSULATION IN GENERAL TRANSPORTING USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION VEHICLE WHEELS VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The waterproof grease composition of the present application comprises a base oil that comprises at least one of mineral oil and synthetic oil and having a kinematic viscosity of from 10 to 400 mm 2 /sec at 40 DEG C, a thickener, and a waterproofness-imparting agent selected from surfactant, metal soap, fluorine-containing water repellent, silicone-type water repellent, pH-controlling agent, wax, polymer and graphite. Accordingly, it may prevent peeling such as white structure peeling even when water is mixed therein. The wheel-supporting roller bearing of the invention comprises an inner member having a raceway surface in the outer peripheral surface thereof, an outer member having, in the inner peripheral surface thereof, a raceway surface that faces the raceway surface of the inner member and disposed outside the inner member, and plural rolling elements rollably disposed between the two raceway surfaces, and which contains the above waterproof grease composition sealed therein; and this has excellent waterproofness.