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Lubricant composition

A lubricating oil composition and the technology of the composition, which are applied in the directions of lubricating compositions, petroleum industry, etc., can solve problems such as adverse effects, and achieve the effects of excellent friction characteristics, excellent sludge inhibition, and excellent water separation.

Active Publication Date: 2015-11-25
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, good water-separation properties are required for hydraulic fluids that may be mixed with water during use, so the use of succinimide, calcium sulfonate, etc., which adversely affect the water-separation performance, cannot be a fundamental solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and comparative example 1～2

[0318] Each lubricating oil composition of the present invention shown in the Examples of Table 1 was prepared. The contents of base oil and additives are based on the total amount of the composition. As the lubricating oil for comparison, a commercially available Zn-based hydraulic oil (manufactured by ExxonMobil Corporation; trade name: DTEOIL25) as Comparative Example 1 and a commercially available turbine oil (manufactured by JXNIPPONOIL & ENERGY CORPORATION; trade name: FBKTurbineOil46) as Comparative Example 2 were used. . The following evaluation tests were performed on these lubricating oil compositions, and the results are shown in Table 1 together.

[0319] [Thermal Stability Test]

[0320] According to the "lubricating oil thermal stability method" stipulated in JISK2540, take 50ml of sample oil into a 50ml capacity beaker, add a coil-shaped catalyst of iron and copper, and perform a certain period of time (10 days, 20 days) in an air constant temperature bath at ...

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Abstract

The invention aims to provide a lubricant composition which has excellent attrition resistance and excellent sludge inhibition and is applicable to hydraulic operating oil and the like used at high temperature and high pressure. According to the solving means, the lubricant composition is characterized in that mineral oil and / or synthetic oil are used as base oil; the lubricant composition is prepared from 0.01-3 mass percent of antioxidant (A) and 0.01-10 mass percent of phosphorous compounds (B), based on the total amount of the composition; and the kinematic viscosity of the composition at 40 DEG C is 1.5-1000mm<2> / s, and the lubricant composition does not contain zinc dithiophosphate substantially.

Description

technical field [0001] This invention relates to lubricating oil compositions. Background technique [0002] Conventionally, lubricating oil for hydraulic working equipment (hereinafter referred to as "hydraulic working oil") has been widely used in the fields of construction machinery and the like. As a hydraulic fluid, in order to impart wear resistance, an wear resistance additive such as zinc dithiophosphate is usually blended. [0003] However, in recent years, hydraulic working oils have been required to have higher characteristics, and it is difficult for the above-mentioned hydraulic working oils to satisfy the requirements. Therefore, development of new hydraulic working oils has been desired. [0004] For example, in recent years, in fields such as construction machinery, hydraulic working devices have been reduced in size and increased in speed, and hydraulic working devices have been increased in pressure. Along with this, higher wear resistance is required for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/06C10N30/08C10N30/04C10N40/08C10N40/04C10N40/02
Inventor 菅原常年
Owner JX NIPPON OIL & ENERGY CORP
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