Title:
潤滑油組成物
Document Type and Number:
Japanese Patent JP5829374
Kind Code:
B2
Abstract:
A lubricant oil composition comprising: a lubricant base oil whose kinematic viscosity at 100°C is 1 to 6 mm 2 /s, %C p is not less than 70, and %C A is not more than 2; a first viscosity index improver in which the ratio A/B of a viscosity increasing effect A in the equation (1) to a viscosity increasing effect B in the equation (2) when added to the lubricant base oil is a value of not less than 4.5, and a PSSI is not more than 30; and a second viscosity index improver in which the ratio A/B when added to the lubricant base oil is a value less than 4.5: A = X - X 0 B = Y - Y 0
wherein A represents a viscosity increasing effect of the kinematic viscosity at 100°C, B represents a viscosity increasing effect of the HTHS viscosity at 150°C, X represents a kinematic viscosity at 100°C of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, X 0 represents a kinematic viscosity at 100°C of the lubricant base oil, Y represents an HTHS viscosity at 150°C of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, and Y 0 represents an HTHS viscosity at 150°C of the lubricant base oil.
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Inventors:
Yaguchi Akira
Shigeki Matsui
Teppei Tsujimoto
Shigeki Matsui
Teppei Tsujimoto
Application Number:
JP2009135447A
Publication Date:
December 09, 2015
Filing Date:
June 04, 2009
Export Citation:
Assignee:
jx Nikko Nisseki Energy Co., Ltd.
International Classes:
C10M145/14
Domestic Patent References:
| JP2008120909A | ||||
| JP200745850A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Yoshinori Shimizu
Hiroyuki Hirano
Hiroto Kido
Masato Ikeda
Yoshiki Kuroki
Yoshinori Shimizu
Hiroyuki Hirano
Hiroto Kido
Masato Ikeda