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Hydraulic oil

A technology of hydraulic oil and extreme pressure anti-wear agent, applied in the field of hydraulic oil, can solve the problems of low flash point, refractory degradation, high toxicity, etc., achieve good low temperature performance, good foam tendency and foam stability, and good foam resistance Effect

Active Publication Date: 2015-10-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic low-viscosity hydraulic oils for low-temperature use mostly naphthenic-based oils, such as aviation hydraulic oils. This hydraulic oil has good low-temperature performance, and its low-temperature service temperature can reach -60°C; but its flash point is low. , less than 100°C, and this kind of hydraulic oil has safety hazards such as volatile, highly toxic, difficult to degrade, and flammable

Method used

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  • Hydraulic oil

Examples

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preparation example Construction

[0060] The present invention has no special limitation on the preparation method of the hydraulic oil, which can be prepared by mixing the components of the hydraulic oil described in the above technical solution. In an embodiment of the present invention, the preparation method of the hydraulic oil may be:

[0061] mixing polyalphaolefin, diester compound, viscosity modifier, antioxidant, antirust agent, extreme pressure antiwear agent and coloring agent to obtain a mixture;

[0062] The mixture is mixed with an antifoaming agent to obtain a hydraulic oil.

[0063] In the present invention, the types, sources and parts by weight of the polyalphaolefins, diester compounds, viscosity modifiers, antioxidants, rust inhibitors, extreme pressure antiwear agents, dyeing agents and antifoaming agents are the same as The types, sources and parts by weight of the polyalphaolefins, diester compounds, viscosity modifiers, antioxidants, rust inhibitors, extreme pressure and antiwear agen...

Embodiment 1

[0077] 89g of PAO2, 11g of dioctyl sebacate, 15g of VX7510, 0.4g of 2,6-di-tert-butyl-p-cresol, 0.4g of N-phenyl-1-naphthylamine, 2.0g of TCP Stir and mix with 0.005g of oily red at 80°C for 0.5 hours to obtain a mixture; filter the mixture with diatomaceous earth, mix and stir the filtered mixture and methyl silicone oil evenly to obtain hydraulic oil, and the methyl silicone oil The mass content in the hydraulic oil is 25 μg / g.

[0078]According to the method described in the above technical solution, the kinematic viscosity, low temperature stability, pour point, flash point, ignition point, evaporation loss, wear performance, and oxidation corrosion of the hydraulic oil prepared in Example 1 of the present invention were tested. The test results are shown in the table 1, Table 1 shows the performance test results of the hydraulic oils provided by the embodiments of the present invention and comparative examples.

Embodiment 2

[0080] 80g of PAO2, 20g of dioctyl sebacate, 15g of YC750, 0.5g of β-(3.5-di-tert-butyl-4 hydroxyphenyl) methyl propionate, 0.5g of N-phenyl-1 -Naphthylamine, 1.5g of TCP, 0.05g of Span-80 and 0.005g of Oily Red were stirred and mixed for 1 hour at 80°C to obtain a mixture; the mixture was filtered with diatomaceous earth, and the filtered mixture was mixed with formazan The base silicone oil was mixed and stirred evenly to obtain a hydraulic oil, and the mass content of the methyl silicone oil in the hydraulic oil was 20 μg / g.

[0081] According to the method described in the above technical solution, the kinematic viscosity, low temperature stability, pour point, flash point, ignition point, evaporation loss, wear performance, and oxidation corrosion of the hydraulic oil prepared in Example 2 of the present invention were tested. The test results are shown in the table 1.

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Abstract

The invention provides a hydraulic oil. The hydraulic oil comprises, by weight, 70-90 parts of poly-alpha-olefin, 10-30 parts of a diester compound, 0.1-3 parts of an antioxidant, 0.1-0.5 parts of an antirust agent, 0.1-5 parts of an extreme pressure anti-wear agent, 0.0005-0.05 parts of an antifoaming agent, 0.001-0.1 parts of a coloring agent and 5-20 parts of a viscosity improver. The use amounts of all components and the comprehensive effects of all the components are controlled to make the hydraulic oil have good low-temperature performances and high flash point. Experiment results that the hydraulic oil can be used at -50DEG C, and the flash point of the hydraulic oil is 172-182DEG C. The hydraulic oil provided by the invention has the advantages of good viscosity-temperature properties, high burning point, good anti-foaming performance and good oxidation stability.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic oil. Background technique [0002] Hydraulic oil is a hydraulic medium used in a hydraulic system that utilizes liquid pressure energy. It plays the roles of energy transmission, anti-wear, system lubrication, anti-corrosion, anti-rust, cooling, etc. in the hydraulic system. For hydraulic oil, it should first meet the requirements of the hydraulic device for liquid viscosity at the working temperature and starting temperature. Since the viscosity change of the hydraulic oil is directly related to the hydraulic action, transmission efficiency and transmission accuracy, the viscosity temperature of the hydraulic oil is also required. Performance and shear stability should meet the various needs presented by different applications. There are many types of hydraulic oil, and the classification methods are different. It is customary to classify according to the purpose...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/08C10N30/02C10N30/18C10N30/10C10N20/02
Inventor 马楷曹毅赵玉贞梅莉刘月皞李玉平李霞
Owner CHINA PETROLEUM & CHEM CORP
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