Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2013/137160
Kind Code:
A1
Abstract:
This lubricating oil composition is prepared by blending a base oil which exhibits a kinematic viscosity of 10 to 1000mm2/s at 40°C with (A) 0.001 to 0.3 mass% (in terms of phosphorus content) of at least one phosphorus compound represented by formula (1), (B) 0.01 to 0.5 mass% (in terms of sulfur content) of at least one sulfur compound, and (D) 0.01 to 1 mass% of a succinimide derivative. The sulfur compound is selected from among: sulfur compounds represented by formula (2); and sulfur compounds which each have a dithio (-S-S-) linkage in the molecule and which each give a result equal or superior to class 2 in a copper strip corrosion test wherein a composition prepared by adding 1 mass% of each of the sulfur compounds to the base oil is examined. (For formulae (1) and (2), refer to the claims.)
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Inventors:
KIKO YUMIKO (JP)
OKADA TAHEI (JP)
OKADA TAHEI (JP)
Application Number:
PCT/JP2013/056556
Publication Date:
September 19, 2013
Filing Date:
March 11, 2013
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
KIKO YUMIKO (JP)
OKADA TAHEI (JP)
KIKO YUMIKO (JP)
OKADA TAHEI (JP)
International Classes:
C10M169/04; C10M101/02; C10M117/02; C10M133/16; C10M133/56; C10M135/20; C10M137/04; C10M137/10; C10N20/02; C10N30/00; C10N30/06; C10N30/08; C10N30/12; C10N40/08
Foreign References:
| JPH02212596A | 1990-08-23 | |||
| JP2011063654A | 2011-03-31 | |||
| JP2011140607A | 2011-07-21 | |||
| JP2006502287A | 2006-01-19 | |||
| JP2008115301A | 2008-05-22 | |||
| JP2008069234A | 2008-03-27 | |||
| JP2003278640A | 2003-10-02 | |||
| JP2003171684A | 2003-06-20 | |||
| JP2011140607A | 2011-07-21 |
Other References:
SHADAN HOJIN NIPPON JUNKATSU GAKKAI, JUNKATSU HANDBOOK, 1 June 1975 (1975-06-01), pages 237, XP008174967
ISAMU OSADA: "Mitsubishi Jukogyo no Furyoku Hatsuden -Yojo Fusha eno Torikumi", FURYOKU ENERGY, vol. 35, no. 1, May 2011 (2011-05-01), pages 14, XP008174657
ISAMU OSADA: "Mitsubishi Jukogyo no Furyoku Hatsuden -Yojo Fusha eno Torikumi", FURYOKU ENERGY, vol. 35, no. 1, May 2011 (2011-05-01), pages 14, XP008174657
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
Bottom intellectual property office of patent business corporation Tatsuyuki (JP)
Bottom intellectual property office of patent business corporation Tatsuyuki (JP)
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