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Lubricant composition

A lubricating oil composition, mineral oil technology, applied in the direction of lubricating composition, petroleum industry, base material, etc., to achieve the effect of excellent oxidation stability

Active Publication Date: 2013-08-21
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to use this cheap solvent-refined base oil, the selection and compounding technology of antioxidants that are less likely to be hindered by aromatic components, sulfur components, and other impurities are indispensable

Method used

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  • Lubricant composition
  • Lubricant composition
  • Lubricant composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～4

[0078] Table 1 shows properties of the solvent-refined base oil (A-1) of component (A) used in the present invention and the highly hydrorefined base oil (A-2) used for comparison.

[0079] According to the compositions shown in Table 2, lubricating oil compositions according to the present invention (Examples 1 to 4) were prepared. Moreover, according to the composition shown in Table 3, the composition for comparison (comparative examples 1-4) was prepared. In addition, (B)-(E) component used in the Example and the comparative example is as follows.

[0080] (B) Ingredients

[0081] B1: 2,6-di-tert-butyl-p-cresol

[0082] B2: p-dodecylphenyl-α-naphthylamine

[0083] (C) Ingredients

[0084] C1: (4-Nonylphenoxy)acetic acid

[0085] (D) Ingredients

[0086] D1: N,N-bis(2-ethylhexyl)-[(1,2,4-triazol-1-yl)methyl]amine

[0087] D2: N,N-bis(2-ethylhexyl)-(4 or 5)-methyl-1H-benzotriazole-1-methylamine

[0088] (E) Ingredients

[0089] E1: Ethyl-3-[{bis(1-methylethoxy)thiop...

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Abstract

Disclosed is a lubricant composition having excellent oxidation stability, which is characterized by containing, as a main component of a base oil, (A) a mineral oil having a composition including 10-50% by mass of a total aromatic content and 0.1-1.0% by mass of a sulfur content, a viscosity index of 85-100 and a pour point of not more than -10°C. The lubricant composition is also characterized by further containing, based on the total amount of the composition, (B) 0.01-5% by mass of an antioxidant, (C) 0.01-0.1% by mass of an alkylphenoxy carboxylic acid, and (D) 0.005-0.1% by mass of a triazole derivative.

Description

technical field [0001] The present invention relates to a lubricating oil composition. Specifically, it relates to a lubricating oil composition having excellent oxidation stability. Background technique [0002] Lubricating oil is made by using mineral oil or chemical synthetic oil as the base oil and blending additives according to the application. In particular, the selection of base oils and antioxidants becomes the most important element to enable lubricating oils to be used for a long time. Generally, mineral oil-based lubricating oils are subjected to solvent refining, hydrocracking, solvent dewaxing, sulfuric acid washing, clay treatment, etc., and advanced hydrofining of lubricating oil fractions of petroleum to reduce the aromatic content, sulfur content, and alkali The highly refined base oil is formulated with various antioxidants to produce a lubricating oil composition with high oxidation stability. [0003] In recent years, lubricating oils used in machines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M101/02C10M129/40C10M133/44C10M137/08C10M137/10C10N20/00C10N20/02C10N30/10C10N40/00C10N40/02C10N40/04C10N40/08C10N40/12C10N40/20C10N40/22C10N40/24C10N40/25C10N40/30
CPCC10M2215/223C10N2230/10C10N2230/02C10M2223/047C10M2203/0206C10M2207/128C10N2240/40C10N2240/02C10N2240/10C10M141/10C10M141/06C10N2030/02C10N2030/10C10N2040/02C10N2040/20C10N2040/25
Inventor 吉田俊雄
Owner NIPPON OIL CO LTD