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Ashless vehicle gear oil and preparation method thereof

A technology for gear oil and vehicles, which is applied in the field of vehicle lubricants and can solve problems such as the inability to meet the requirements for the anti-oxidation performance of gear oils

Pending Publication Date: 2021-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional vehicle gear oil additive system, it is mainly based on S-P-Zn, because ZDDP thionyl octyl zinc salt is a multi-effect lubricating oil additive, which has anti-oxidation and anti-wear agent extreme pressure properties, but With the requirements of environmental protection regulations, the use of such ZDDP additives can no longer meet the anti-oxidation performance requirements of gear oils at this stage. Thionyl octyl zinc salt is an inorganic metal salt additive. Severe conditions are prone to optimize the formation of sludge and solid deposits

Method used

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  • Ashless vehicle gear oil and preparation method thereof
  • Ashless vehicle gear oil and preparation method thereof
  • Ashless vehicle gear oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The specific components of ashless vehicle gear oil are shown in Table 1:

[0046] Table 1 Ashless vehicle gear oil composition components

[0047]

[0048] Above-mentioned gear oil is prepared by following method:

[0049] 1) Add base oil and pour point depressant in proportion, heat up to 50-60°C for heating and stirring, keep for 2-3 hours, then lower the temperature to 40-50°C;

[0050] 2) Then add the extreme pressure antiwear agent, antirust agent, friction modifier, antioxidant, metal deactivator, dispersant, and antifoaming agent in sequence, and stir for 2 to 3 hours until the mixture is completely dissolved and becomes transparent , that is.

experiment example

[0052] For the quality and technical indicators of vehicle gear oil, mainly according to GB13895 "heavy-duty vehicle gear oil (GL-5)" national standard, the test result of Example 1 is compared with the GB13895 standard, as shown in the following table:

[0053] Table 2 Physical and chemical analysis data of ashless vehicle gear oil combination

[0054]

[0055]

[0056] Table 3 Physical and chemical analysis data of ashless vehicle gear oil combination (continued)

[0057]

[0058] Table 4 Physical and chemical analysis data of ashless vehicle gear oil combination (continued)

[0059]

[0060] From the analysis of test results, it can be seen that the various indicators of the ashless vehicle gear oil composition of the above-mentioned embodiment can reach the GB13895 standard, and have passed the requirements of L-37, L-42, L-33 and L-60. A bench test. The invention has excellent high and low temperature performance, thermal oxidation stability, extreme pressure ...

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Abstract

The invention relates to the technical field of vehicle lubricating oil, in particular to ashless vehicle gear oil and a preparation method thereof. The ashless vehicle gear oil is added with an extreme-pressure anti-wear agent, and the extreme-pressure anti-wear agent is a mixture of a sulfur type extreme-pressure agent and a phosphorus type extreme-pressure agent, wherein the sulfur type extreme-pressure anti-wear agent is high-pressure sulfurized isobutylene, and the phosphorus type extreme-pressure anti-wear agent is thiophosphate ammonium salt. By optimizing the selection of the extreme-pressure anti-wear agent, the addition of Zn element into the gear oil can be omitted, the traditional S-P-Zn additive system is replaced, the ashless vehicle gear oil is obtained.

Description

technical field [0001] The invention relates to the technical field of vehicle lubricating oil, in particular to an ashless vehicle gear oil. Background technique [0002] GL-5 heavy-duty vehicle gear oil is generally used for the lubrication of drive shafts (front and rear axles) of various vehicles and construction machinery drive axles, especially for vehicles equipped with hypoid gears. For such drive axle assemblies Said that oil products are required to have excellent anti-wear and load-carrying capacity, and form a lubricating oil film on the surface of the friction pair to maintain lubricating performance. In order to adapt to the upgrading of the automobile industry, the requirements for heavy-duty vehicle gear oil are also constantly upgrading. Therefore, improving the thermal oxidation stability of vehicle gear oil and the cleanness and dispersibility of sludge has become the main development direction at present, which is conducive to prolonging the service life ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M141/00C10N30/06C10N30/08C10N30/10C10N30/12C10N30/18C10N40/04
CPCC10M141/00C10M169/044C10M2219/022C10M2223/047C10M2219/106C10M2215/086C10M2207/282C10M2203/1006C10M2203/1025
Inventor 文彦龙周轶张国茹王宁
Owner CHINA PETROLEUM & CHEM CORP