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Title:
LUBRICANT COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2011/027730
Kind Code:
A1
Abstract:
Disclosed is a lubricant composition which contains a lubricant base oil that has a kinematic viscosity at 100˚C of 1-6 mm2/s, a %CP of not less than 70 and a %CA of not more than 2, and a viscosity index improver which would have an A/B ratio of less than 3.2 and a C/B ratio of less than 1.5 when added to the lubricant base oil. In this connection, A represents the thickening effect with respect to the kinematic viscosity at 100˚C; X represents the kinematic viscosity at 100˚C of a mixture of the lubricant base oil and 3% by mass of the viscosity index improver; X0 represents the kinematic viscosity at 100˚C of the lubricant base oil; B represents the thickening effect with respect to the HTHS viscosity at 150˚C; Y represents the HTHS viscosity at 150˚C of the mixture of the lubricant base oil and 3% by mass of the viscosity index improver; Y0 represents the HTHS viscosity at 150˚C of the lubricant base oil; C represents the thickening effect with respect to the HTHS viscosity at 100˚C; Z represents the HTHS viscosity at 100˚C of the mixture of the lubricant base oil and 3% by mass of the viscosity index improver; and Z0 represents the HTHS viscosity at 100˚C of the lubricant base oil. A = X - X0 (1) B = Y - Y0 (2) C = Z - Z0 (3)

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Inventors:
MUTOU AKIO (JP)
YAGUCHI AKIRA (JP)
MATSUI SHIGEKI (JP)
Application Number:
PCT/JP2010/064698
Publication Date:
March 10, 2011
Filing Date:
August 30, 2010
Export Citation:
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Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
MUTOU AKIO (JP)
YAGUCHI AKIRA (JP)
MATSUI SHIGEKI (JP)
International Classes:
C10M171/02; C10M145/14; C10N20/00; C10N20/02; C10N30/00; C10N30/02; C10N40/25
Domestic Patent References:
WO2009090921A12009-07-23
WO2009072524A12009-06-11
WO2005037967A12005-04-28
Foreign References:
JP2009167278A2009-07-30
JP2001279287A2001-10-10
JP2002129182A2002-05-09
JPH08302378A1996-11-19
JPH06306384A1994-11-01
Other References:
See also references of EP 2474602A1
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
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