Lubricant composition for gas engines

JP2026093581APending Publication Date: 2026-06-09ENEOS CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
ENEOS CORP
Filing Date
2024-11-28
Publication Date
2026-06-09

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Abstract

To provide a lubricating oil composition for gas engines that enables excellent seizure resistance (load-bearing capacity). [Solution] A lubricating oil composition for gas engines, characterized in that it contains (A) a lubricating oil base oil containing a hydrocarbon base oil; (B) a hyperbasic calcium salicylate; (C) a molybdenum dithiocarbamate; (D) a zinc dialkyldithiophosphate anti-wear agent containing zinc dialkyldithiophosphate in which all alkyl groups in the molecule are secondary alkyl groups; and (E) water, wherein the content of component (B) in terms of calcium element is 700 ppm by mass or more relative to the total mass of the composition minus the mass of component (E), the content of component (C) in terms of molybdenum element is 200 ppm by mass or more relative to the total mass of the composition minus the mass of component (E), and the content of component (E) is 0.2% by mass or more and 30% by mass or less relative to the total mass of the composition.
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Claims

1. The following ingredients (A) to (E): (A) Lubricating oil base oil containing hydrocarbon base oil (B) Overbasic calcium salicylate (C) Molybdenum dithiocarbamate (D) A zinc dialkyldithiophosphate anti-wear agent containing zinc dialkyldithiophosphate in which all alkyl groups in the molecule are secondary alkyl groups. (E) Water It contains, The calcium content of component (B) is 700 ppm or more by mass relative to the total mass of the composition minus the mass of component (E). The molybdenum content of component (C) is 200 ppm by mass or more relative to the total mass of the composition minus the mass of component (E), and The content of component (E) is 0.2% by mass or more and 30% by mass or less based on the total mass of the composition. A lubricating oil composition for gas engines characterized by the following.

2. The gas engine lubricating oil composition according to claim 1, characterized in that the content of component (E) is 4.0% by mass or more and 25% by mass or less with respect to the total mass of the composition.

3. The gas engine lubricating oil composition according to claim 1, characterized in that the content of component (D) in terms of phosphorus element is 200 ppm by mass or more and 1500 ppm by mass or less, relative to the mass obtained by subtracting the mass of component (E) from the total mass of the composition.

4. The gas engine lubricating oil composition according to claim 1, characterized in that the content of component (B) in terms of calcium element is 1,000 ppm by mass or more relative to the mass obtained by subtracting the mass of component (E) from the total mass of the composition.

5. The gas engine lubricating oil composition according to claim 1, characterized in that the content of component (C) in terms of molybdenum element is 350 ppm by mass or more relative to the mass obtained by subtracting the mass of component (E) from the total mass of the composition.

6. The lubricating oil composition for a gas engine according to claim 1, characterized in that it is a lubricating oil composition for a hydrogen engine.