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Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/209540
Kind Code:
A1
Abstract:
Provided is a lubricating oil composition that is for gas engines and that contains: a base oil (A); at least one overbased calcium cleaning agent (B) selected from calcium salicylate (B1) and calcium phenate (B2); alkenylsuccinic acid imide (C); and a hindered amine-based antioxidant (D). The contained amount (X) of calcium atoms derived from component (B) is less than 0.090 mass% with respect to the total amount of the lubricating oil composition. The contained amount (Y) of calcium carbonate included in component (B) is not less than 0.060 mass% with respect to the total amount of the lubricating oil composition. The contained amount of boron atoms derived from component (C) is less than 0.020 mass% with respect to the total amount of the lubricating oil composition. The contained amount of component (D) is more than 0.20 mass% with respect to the total amount of the lubricating oil composition.

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Inventors:
KUSUMOTO TATSUYA (JP)
KASAI MORITSUGU (JP)
Application Number:
PCT/JP2022/008757
Publication Date:
October 06, 2022
Filing Date:
March 02, 2022
Export Citation:
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Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M163/00; C10M133/12; C10M133/16; C10M133/56; C10M137/10; C10M139/00; C10M159/22; C10N10/04; C10N30/00; C10N30/04; C10N30/10; C10N40/12
Domestic Patent References:
WO2020085228A12020-04-30
WO2020203525A12020-10-08
WO2015151769A12015-10-08
Foreign References:
JP2020164747A2020-10-08
JP2015108144A2015-06-11
JP2013518936A2013-05-23
JP2007506840A2007-03-22
JP2003277783A2003-10-02
JPH10219266A1998-08-18
JP2018203952A2018-12-27
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
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