Title:
GREASE COMPOSITION FOR CONSTANT VELOCITY JOINT
Document Type and Number:
WIPO Patent Application WO/2020/054802
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a grease composition for a constant velocity joint, which exhibits excellent abrasion resistance. Provided is a grease composition that contains a base oil (A) and a urea-based thickening agent (B) represented by general formula (B1).
(B1): R1-NHCONH-R3-NHCONH-R2
[In general formula (B1), R1 and R2 each independently denote a monovalent hydrocarbon group having 6-24 carbon atoms. R1 and R2 may be the same as, or different from, each other. R3 denotes a divalent aromatic hydrocarbon group having 6-18 carbon atoms. The monovalent hydrocarbon groups include alicyclic hydrocarbon groups and chain-like hydrocarbon groups, and may include aromatic hydrocarbon groups. Moreover, in R1 and R2 in general formula (B1), if the content of the alicyclic hydrocarbon groups is taken to be a molar equivalent X, the content of the chain-like hydrocarbon groups is taken to be a molar equivalent Y, and the content of the aromatic hydrocarbon groups is taken to be a molar equivalent Z, requirements (a) and (b) are satisfied.
· Requirement (a): the value of {(X+Y)/(X+Y+Z)}×100 is 90 or more.
· Requirement (b): the ratio X/Y is 10/90-75/25.]
Inventors:
KOGA ASAMI (JP)
SHISHIKURA AKIHIRO (JP)
SHISHIKURA AKIHIRO (JP)
Application Number:
PCT/JP2019/035906
Publication Date:
March 19, 2020
Filing Date:
September 12, 2019
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M115/08; C10M137/10; C10M139/00; F16D3/20; C10N30/06; C10N40/04; C10N50/10
Domestic Patent References:
| WO2016125859A1 | 2016-08-11 |
Foreign References:
| JP2003155491A | 2003-05-30 | |||
| JP2006335876A | 2006-12-14 | |||
| JP2011063659A | 2011-03-31 | |||
| JPH11172276A | 1999-06-29 | |||
| JPH10273691A | 1998-10-13 |
Other References:
See also references of EP 3851506A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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