Title:
GREASE COMPOSITION FOR HUB UNIT BEARING EQUIPPED WITH ANGULAR CONTACT BALL BEARING, AND HUB UNIT BEARING
Document Type and Number:
WIPO Patent Application WO/2011/105601
Kind Code:
A1
Abstract:
Disclosed is a grease composition for a hub unit bearing equipped an angular contact ball bearing, which comprises (a) a thickening agent that is a mixture of diurea compounds respectively represented by the following formulae (I) to (III): (I) R1-NHCONH-R2-NHCONH-R1, (II): R1-NHCONH-R2-NHCONH-R3 and (III): R3-NHCONH-R2-NHCONH-R3 (wherein R1 represents a cyclohexyl group, R2 represents a C6-15 bivalent aromatic hydrocarbon group; and R3 represents a C12-20 linear or branched alkyl group, wherein {R1/(R1+R3)}×100 = 85 to 95 mol%), (b) a base oil, (c) a molybdenum dialkyldithiocarbamate, and (d) calcium sulfonate. The grease composition can reduce the leakage of a grease in a hub unit bearing and has excellent peeling resistance and an excellent bearing lubrication life.
Inventors:
SAITA OSAMU (JP)
AZUMA TAKASHI (JP)
YAMAMOTO MASAMICHI (JP)
AZUMA TAKASHI (JP)
YAMAMOTO MASAMICHI (JP)
Application Number:
PCT/JP2011/054496
Publication Date:
September 01, 2011
Filing Date:
February 28, 2011
Export Citation:
Assignee:
KYODO YUSHI (JP)
SAITA OSAMU (JP)
AZUMA TAKASHI (JP)
YAMAMOTO MASAMICHI (JP)
SAITA OSAMU (JP)
AZUMA TAKASHI (JP)
YAMAMOTO MASAMICHI (JP)
International Classes:
C10M169/00; C10M101/02; C10M115/08; C10M135/10; C10M135/18; C10M159/24; F16C19/18; F16C33/66; C10N10/12; C10N30/00; C10N40/02; C10N50/10
Domestic Patent References:
| WO2009104790A1 | 2009-08-27 |
Foreign References:
| JP2006342261A | 2006-12-21 | |||
| JPS4971357A | 1974-07-10 | |||
| JP2008286230A | 2008-11-27 | |||
| JP2006077056A | 2006-03-23 | |||
| JP2008088386A | 2008-04-17 | |||
| JP2008111057A | 2008-05-15 | |||
| JPH09324190A | 1997-12-16 | |||
| JPH10183162A | 1998-07-14 |
Other References:
See also references of EP 2540813A4
Attorney, Agent or Firm:
TSUJII Koichi et al. (JP)
辻居 Koichi (JP)
辻居 Koichi (JP)
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Claims: