Grease to be sealed in bearing

Details Grease to be sealed in bearing Grease to be sealed in bearing

1997-01-29

1999-06-08

Howard, Jacqueline V.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Organic -co- compound

508552, C10M14522

Patent

active

059104708

ABSTRACT:
A grease to be sealed in bearings which shows good lubricating properties within a wide temperature range from low to high temperatures, whereby it can prevent bearing noise while it is cold, and maintain its good properties including excellent high-temperature durability for a long period of time. The grease contains a base oil made up of a synthetic hydrocarbon oil and an ester synthetic oil having eight or more ester groups arranged in a comb-like fashion on one side of an oil chain molecule made up of eight of more carbon atoms, as expressed by Formula below, the ratio of contents in weight of the synthetic hydrocarbon oil and the ester synthetic oil being 0.65-0.75:0.35-0.25, and 5-20 wt % of a urea thickening agent. The grease may further contain 0.1-10 wt % dithiophosphate as an extreme pressure agent. The grease may be used as grease to be sealed in a ball bearing for supporting a pulley engaging belts for transmitting automotive engine torque to prevent noise immediately after the engine is started. ##STR1## (where R.sub.1 -R.sub.4 are alkyl groups, and x and y are integers greater than 1).

REFERENCES:
patent: 4548725 (1985-10-01), Bridger
patent: 4877557 (1989-10-01), Kaneshige et al.
patent: 5516443 (1996-05-01), Jackson
patent: 5554200 (1996-09-01), Brod et al.

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