Lubricating oil composition, buffer and method for using lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorKenji Kobayashi
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Abstract
A lubricating oil composition may be used for lubrication of a shock absorber. The composition may include a base oil (A), a zinc dithiophosphate (B), and an alkenylsuccinic imide (C). The lubricating oil composition can be more preferably applied to lubrication of a shock absorber. Based on the total lubricating oil composition mass, a content of the component (C) in terms of nitrogen atoms is in a range of from 0.001 to 0.09 mass %, and/or a content of the component (B) in terms of zinc atoms is in a range of from 0.005 to 1.0 mass %.
Claims20
A lubricating oil composition suitable for lubrication of a shock absorber in contact with a rubber component, the composition comprising:
- a base oil (A) comprising a mineral oil classified in Group III of API;
- a zinc dithiophosphate (B) comprising a zinc dialkyldithiophosphate;
- and
- an alkenylsuccinic imide (C),
- wherein the zinc dithiophosphate (B), in terms of zinc atoms, is present in a range of from 0.035 to 0.14 mass %, based on total lubricating oil composition mass,
- wherein the alkenylsuccinic imide (C), in terms of nitrogen atoms, is present in a range of from 0.005 to 0.12 mass %, based on the total lubricating oil composition mass, and
- wherein the lubricating oil composition has a kinematic viscosity at 40° C. in a range of from 5.0 to 50 mm2/s.
Dependencies are inferred from the claim text.