Lubricating oil composition

A lubricating oil composition and composition technology, applied in lubricating compositions, gear lubrication/cooling, petroleum industry, etc., can solve problems such as poor oil film retention, achieve excellent low-temperature viscosity characteristics, maintain fatigue life, and save fuel consumption. Effect

Inactive Publication Date: 2012-10-17
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the improvement of the fatigue life has an inverse relationship with the increase of the viscosity index. In Patent Document 2, although the viscosity index is improved, the oil film retention is poor.

Method used

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  • Lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0062] [Examples 1-5, Comparative Examples 1-5]

[0063] Lubricating oil compositions were prepared according to the compositions shown in Table 1, and the dynamic viscosities and post-shear viscosities of the prepared compositions at 100°C and -40°C were measured according to the methods shown below.

[0064] It should be noted that the components recorded in Table 1 are as follows:

[0065] Mineral oil-1: The sulfur content is 0.03% by mass or less, and the dynamic viscosity at 100°C is 1.0 mm 2 / s, the dynamic viscosity at 40°C is 2.6mm 2 / s mineral oil

[0066] Mineral oil-2: The sulfur content is 0.03% by mass or less, and the dynamic viscosity at 100°C is 6.5mm 2 / s, the dynamic viscosity at 40°C is 37mm 2 / s mineral oil

[0067] PAO-1: Dynamic viscosity at 100°C is 300mm 2 / s PAO

[0068] PAO-2: Dynamic viscosity at 100°C is 1.8mm 2 / s PAO

[0069] PAO-3: Dynamic viscosity at 100°C is 100mm 2 / s PAO

[0070] Esters: dynamic viscosity at 100°C is 3.4mm 2 / s b...

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Abstract

Disclosed is a lubricating oil composition that is characterized by comprising a mixture of (A) in the range of 5 mass% to 70 mass%, based on the total amount of the composition, of a lubricant base oil in which the sulfur content is no more than 0.03 mass%, based on the total amount of the composition, and the kinematic viscosity at 100 DEG C is in the range of 0.5 mm2 / s to 1.5 mm2 / s, and (B) in the range of 15 mass% to 30 mass%, based on the total amount of the composition, of a poly-alpha-olefin in which the kinematic viscosity at 100 DEG C is at least 150 mm2 / s.

Description

technical field [0001] This invention relates to lubricating oil compositions. Background technique [0002] In recent years, against the backdrop of the global carbon dioxide emission problem and the increase in global energy demand, there has been an increasing demand for fuel-efficient automobiles. Among them, the transmission, which is an automobile component, is also required to contribute more to fuel economy than before. [0003] For example, as one of the fuel-saving means of the transmission, the low viscosity of the lubricating oil can be cited, but the oil film retention of the low viscosity lubricating oil at high temperature is reduced, and the occurrence of seizure or fatigue life is often caused. issues such as reduction. [0004] Patent Document 1 reports an optimized composition in which various additives are blended as a lubricating oil composition capable of maintaining shifting characteristics for a long period of time. However, since the invention des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M101/02C10M107/02C10M143/00C10M145/14C10M155/02F16H57/04C10N20/00C10N20/02C10N20/04C10N30/00C10N30/02C10N40/04C10M111/04
CPCC10M2207/281C10N2220/021C10M2219/08C10M2223/047C10M2215/28C10M2223/04C10M2209/084C10M169/04C10N2230/02C10N2240/04C10M2229/0415C10M2229/025C10M2205/0285C10M2219/046C10M111/04C10N2230/68C10M2203/1006C10N2220/022C10N2020/04C10N2020/02C10N2030/02C10N2030/68C10N2040/04C10N2010/04C10M101/02C10M107/02C10M143/00
Inventor 藤田裕
Owner IDEMITSU KOSAN CO LTD
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