Title:
GREASE COMPOSITION AND ROLLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/107882
Kind Code:
A1
Abstract:
The present invention provides a grease composition which makes it possible to prevent deterioration in sealing properties even when base oil having a kinetic viscosity of as low as, for example, 5-40 mm2/s is used and which makes it possible to realize both sealing properties and a decrease in torque. The present invention also provides a rolling device. A sealing member (12a) comprises a plurality of sealing lips (114), (115), (116) each of which is made of an elastic material. A grease composition is sealed in void parts (121), (122) that are each located between a sliding surface of a slinger (106), on which the plurality of sealing lips slide, and two adjacent sealing lips. This grease composition contains base oil and a polar polymer. The polar polymer has a weight-average molecular weight of 5,000-140,000.
Inventors:
ITO AZUMA (JP)
MATSUMOTO TOMOAKI (JP)
ASHIDA HARUHISA (JP)
MATSUMOTO TOMOAKI (JP)
ASHIDA HARUHISA (JP)
Application Number:
PCT/JP2021/042603
Publication Date:
May 27, 2022
Filing Date:
November 19, 2021
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
C10M143/00; C10M145/14; C10M145/16; C10M145/22; C10M145/24; C10M149/14; F16C19/18; F16C33/66; F16C33/78; F16J15/3232; F16J15/324; F16J15/3256; C10N20/02; C10N20/04; C10N30/00; C10N50/10
Foreign References:
| JP2015075180A | 2015-04-20 | |||
| JP2019172984A | 2019-10-10 | |||
| JP2013129794A | 2013-07-04 | |||
| JP2010174117A | 2010-08-12 | |||
| JP2012107758A | 2012-06-07 | |||
| JP2012193835A | 2012-10-11 | |||
| JP2020193495A | 2020-12-03 |
Other References:
See also references of EP 4249575A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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