Lubricant composition for gasoline engine

A technology of lubricating oil composition and gasoline engine, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., and can solve problems such as the application of thiophenol ester type antioxidant and thioether phenol type antioxidant, etc. To achieve the effect of excellent anti-oxidation performance

Active Publication Date: 2012-09-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not mention the application of thiop...

Method used

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  • Lubricant composition for gasoline engine
  • Lubricant composition for gasoline engine
  • Lubricant composition for gasoline engine

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-5

[0065] Add antioxidants T534, 1035, and methylidene 4426-S into the mixing container in proportion, heat at 60°C-90°C under normal pressure, and stir for 1 hour-2 hours to obtain a uniform transparent light yellow viscous liquid. Invented component A composite antioxidant. See Table 1 for the composition ratio (mass fraction) of the composite antioxidant preparation examples 1-5.

[0066] Table 1

[0067] serial number

Embodiment 1

[0069] Embodiment 1-7 is the composition and main properties of the gasoline engine lubricating oil of the present invention. Put each component into the mixing container in proportion, heat at 45°C-80°C under normal pressure, and stir for 1 hour-2 hours to prepare SM / GF-4 low-phosphorus and low-ash gasoline engine lubrication with a viscosity grade of 5W-30 Oil. In comparative examples 1, 2, and 3-1, single-component antioxidants were added, namely T534, 1035, and methylene 4426-S, and in comparative example 3-2, a double-component antioxidant prepared by the method of patent CN100460490C was added. Divide compound antioxidant, wherein embodiment 1 and comparative example 1, embodiment 2 and comparative example 2 have all identical formulas except antioxidant respectively, and embodiment 3 and comparative example 3-1, 3-2 also have All the same formula composition except antioxidant. See Table 2 for the composition ratios (mass fractions) of Examples 1-7 and Comparative Exa...

Embodiment 8-13

[0079] The SM / GF-4 low-phosphorus and low-ash gasoline engine lubricating oil composition with a viscosity grade of 5W-40 was obtained by the same preparation method as in the previous examples. The speckle dispersion test was carried out for Examples 8-13, and the formulation composition and dispersion test results are shown in Table 5. Wherein embodiment 8-11 adds the mixture of polyisobutylene succinimide and boron-containing polyisobutylene succinimide, and what adds in embodiment 12, 13 is the dispersant of single component.

[0080] table 5

[0081]

[0082] The spot dispersion test method is to add 30% of program VG engine oil sludge to the test oil, ultrasonically disperse it for 6 minutes, heat it in an oven at 200°C for 2 hours, then drop the oil on the filter paper, measure the diameter of the oil spot dispersion circle and the oil sludge dispersion after 24 hours The ratio of the ring diameters is the dispersion index. The higher the dispersion index, the bett...

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Abstract

The invention relates to a lubricant composition for a gasoline engine. The lubricant composition contains: by mass, less than or equal to 0.08% of phosphorus and less than or equal to 0.9% of sulfate ash. The lubricant composition comprises A) a composite antioxidant comprising at least ingredients of 1, an alkylated diphenylamine antioxidant, 2, a thiophenolic ester antioxidant and 3, an unessential phenolic thioether antioxidant, B) a polyisobutylene succinimide ashless dispersant and/or a boronized polyisobutylene succinimide dispersant, C) one or more alkaline earth metal salicylate cleaning agents, D) at least one zinc dialkyl dithiophosphate, E) one or more oil-soluble organic molybdenum friction modifiers, F) one or more ashless friction modifiers, and G) a main amount of lubricating base oil. The lubricant composition for a gasoline engine has synergistic effect of the additives, can satisfy antioxidation requirements of a high-grade gasoline engine lubricant, and has excellent piston cleanliness, wear resistance and a viscosity increasing control capacity.

Description

technical field [0001] The present invention relates to a lubricating oil composition, in particular to a lubricating oil composition for a gasoline engine. Background technique [0002] The high power and miniaturization of gasoline engines reduce the airflow around the engine, which increases the requirements for the anti-oxidation ability of engine lubricating oil and the ability to inhibit piston deposits. With the increasingly stringent emission regulations, the requirements for engine emissions are becoming more and more stringent, which also puts forward higher requirements for the performance of engine lubricating oil. The upgrading of gasoline engine lubricating oil has also continued to increase the requirements for oil anti-oxidation, piston cleaning, sludge dispersion, and anti-wear performance. At present, the product specifications of high-end gasoline engine lubricating oil have been upgraded to the International Lubricant Standardization and Certification Com...

Claims

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Application Information

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IPC IPC(8): C10M161/00C10N40/25C10N30/06C10N30/10
Inventor 谢欣武志强王立华贾秋莲张辉李新华段庆华李华杨永璧
Owner CHINA PETROLEUM & CHEM CORP
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