Lubricant composition for ship outboard engine

A technology for lubricating oil composition and outboard engine, applied in lubricating composition, petroleum industry, additives and other directions, can solve the problems of harsh anti-oxidation requirements, easy oxidative deterioration and corrosion of lubricating oil, and achieve excellent anti-oxidative performance, Good high temperature cleaning effect

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

AI Technical Summary

Problems solved by technology

[0002] The outboard engine of a ship has a higher speed and higher operating temperature than a gasoline engine of an ordinary car, so that the engine lubricating oil is under the condition of high heat load and easy oxidation and deterioration. Zinc dialkyl dithiophosphate cannot effectively solve the oxidation problem of oil products, so other antioxidants must be added
The lubricating oil of marine outboard motors is used for a long time, and organic acids, peroxides and colloids will be generated in a high-temperature thermal oxidation environment, which will increase the viscosity of the oil and corrode non-ferrous metals, which is not conducive to the cleaning and lubrication of pistons and engines, and shorten the oil life. Therefore, it is required to have good anti-oxidation performance and anti-corrosion performance, so it is necessary to use anti-oxidation additives with excellent performance

Method used

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  • Lubricant composition for ship outboard engine
  • Lubricant composition for ship outboard engine
  • Lubricant composition for ship outboard engine

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-4

[0058] 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. The composition ratio (mass fraction) of composite antioxidant preparation examples 1-4 is shown in Table 1.

[0059] Table 1

[0060] serial number

Embodiment 1

[0062] Embodiments 1-5 are the composition and main properties of the marine outboard motor lubricating oil of the present invention. Add each component into a blending container in proportion, heat at 45°C-80°C under normal pressure, and stir for 1 hour-2 hours to prepare a marine outboard motor lubricating oil with a viscosity grade of SAE 10W-30. 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 1-5 and Comparative Examples 1, 2, 3-1...

Embodiment 6、7

[0071] Embodiment 6,7 and comparative example 4-6

[0072] According to the composition of Table 5, the marine outboard engine oil with a viscosity grade of 10W-30 was prepared. Each 300ml of the oil products of Examples 6 and 7 and Comparative Examples 4-6 were subjected to a coke-forming test. The formulation compositions and coke plate test results of the examples and comparative examples are shown in Table 5. Wherein embodiment 6,7 added is the mixture of high alkali value calcium salicylate and high alkali value sulfurized alkylphenate calcium, and what added in comparative example 4,5 is the high alkali value calcium salicylate of single component respectively Or high base value sulfurized calcium alkylphenate. The difference between Example 6 and Comparative Example 6 is that a metal deactivator 2-mercaptobenzothiadiazole is added in Example 6, and no metal deactivator is added in Example 6.

[0073] table 5

[0074]

[0075] The equipment used in the coke plate ...

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Abstract

The invention relates to a lubricant composition for a ship outboard engine. The lubricant composition comprises A) a composite antioxidant composing at least components of 1, an alkylated diphenylamine antioxidant, 2, a thiophenolic ester antioxidant and 3, an unessential phenolic thioether antioxidant, B) a polyisobutylene succinimide ashless dispersant, C) a mixture of calcium salicylate and sulfurized calcium alkyl phenate, D) at least one zinc dialkyldithiophosphate, E) at least one extreme pressure anti-wear reagent, F) one or more metal deactivators, and G) a main amount of lubricating base oil. The lubricant composition utilizes optimized combination of the multiple ashless antioxidants, is compounded with the appropriate clearing agent and the dispersant, has a synergistic effect of the additives, can satisfy high-temperature antioxidation requirements of lubricating oil for a ship outboard engine, and has excellent piston cleanliness, high / low-temperature wear resistance and a good 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 marine outboard motors. Background technique [0002] Compared with ordinary car gasoline engines, outboard engines of ships have higher speed and higher operating temperature, which makes the engine lubricating oil under the working conditions of high heat load and easy oxidation and deterioration. The agent dialkyl dithiophosphate zinc cannot effectively solve the oil oxidation problem, and other antioxidants must be added. Long-term cycle use of lubricating oil for marine outboard engines will generate organic acids, peroxides and colloids in a high-temperature thermal oxidation environment, which will increase the viscosity of the oil and corrode non-ferrous metals, which is not conducive to the cleaning and lubrication of pistons and engines, and shorten the oil life. Therefore, it is required to have good anti-oxidation performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00C10N40/25C10N30/06
Inventor 谢欣张辉武志强李新华王立华段庆华周红英杨永璧
Owner CHINA PETROLEUM & CHEM CORP
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