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Lubricating oil composition

A lubricating oil composition and composition technology, applied in the direction of lubricating composition, petroleum industry, base materials, etc., can solve the problems of reduced fatigue life of tooth surfaces, etc., and achieve the effect of reducing friction loss and excellent shear stability

Inactive Publication Date: 2015-11-04
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply reduce the viscosity of the gear oil (for example, the kinematic viscosity at 100°C is 6mm 2 / s or less), although the effect of reducing the oil agitation loss in the device is large, there are problems in terms of gear knocking sound, gear wear, reduction of tooth surface fatigue life, and gear sintering due to insufficient viscosity at high temperature, etc.

Method used

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  • Lubricating oil composition
  • Lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~9

[0084] [Examples 1-9, Comparative Examples 1-9]

[0085] Lubricating oil compositions (sample oils) shown in Table 1 and Table 2 were prepared using the base oils and additives shown below. Each performance of each sample oil was evaluated by the method mentioned above, and the results are shown in Table 1 and Table 2.

[0086] Mineral oil-1: highly purified mineral oil (kinematic viscosity at 100°C: 0.87mm 2 / s)

[0087] Mineral oil-2: Highly purified mineral oil (kinematic viscosity at 100°C: 1.5mm 2 / s, viscosity index: 83)

[0088] Mineral oil-3: Highly purified mineral oil (kinematic viscosity at 100°C: 2.2mm 2 / s, viscosity index: 109)

[0089] Mineral oil-4: Highly purified mineral oil (kinematic viscosity at 100°C: 2.7mm 2 / s, viscosity index: 114)

[0090] Mineral oil-5: Highly purified mineral oil (kinematic viscosity at 100°C: 3.1mm 2 / s, viscosity index: 109)

[0091] Mineral oil-6: Highly purified mineral oil (kinematic viscosity at 100°C: 4.1mm 2 / s, vi...

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Abstract

This lubricating oil composition is characterized by comprising poly(meth)acrylate having a mass-average molecular weight of 3×104 to 5×105 blended in a base oil having a kinematic viscosity of 0.6 mm2 / s to 3.5 mm2 / s at 100°C.

Description

technical field [0001] The present invention relates to a lubricating oil composition, and more specifically, to a lubricating oil composition suitably used for a gear device used in a manual transmission used in an automobile or the like. Background technique [0002] Demands for energy saving such as saving fuel consumption and saving resources have become new issues for the purpose of environmental protection on a global scale. In addition, lubricating oil compositions for gear devices (gear oils) used in manual transmissions and final reducers of automobiles, and accelerators and reducers of various industrial machines require energy-saving performance by reducing friction loss. However, simply reduce the viscosity of the gear oil (for example, the kinematic viscosity at 100°C is 6mm 2 / s or less), although the effect of reducing the oil stirring loss in the device is great, but due to the insufficient viscosity at high temperature, there are problems in the generation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C10M105/32C10M169/04C10N10/12C10N30/00C10N40/04
CPCC10M145/14C10M169/04C10M2207/2805C10M2209/084C10N2220/022C10N2240/04C10N2020/02C10N2040/04C10M169/044
Inventor 藤井智明户田昌利
Owner IDEMITSU KOSAN CO LTD