Low-temperature lubricating grease and preparation method thereof

A low-temperature lubrication and fatty acid soap technology, applied in the field of grease, can solve the problems of high volatility, poor high temperature performance and high cost of synthetic oil

Active Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are many varieties of aviation grease, they cannot fully meet the above requirements.
[0005] Organic bentonite grease is a kind of high-temperature grease with certain extreme pressure properties. It is often used to prepare open gear grease. For example, the grease introduced in GB2, 043, and 684 is mineral oil, bentonite grease, and added with Zinc oxide and metal borides are used as extreme pressure agents, but mineral oil has poor low-temperature performance, which cannot meet the low-temperature lubrication performance of aircraft flying at high altitudes, and mineral oil-based oils have poor high-temperature performance, high volatility, and are easy to dry out
Compared with mineral oil, synthetic oil ha...

Method used

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  • Low-temperature lubricating grease and preparation method thereof
  • Low-temperature lubricating grease and preparation method thereof
  • Low-temperature lubricating grease and preparation method thereof

Examples

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preparation example Construction

[0047] The present invention also provides a preparation method of the above-mentioned low-temperature lubricating grease, comprising the following steps: A) 20-40 parts by weight of mineral oil, 60-80 parts by weight of synthetic oil, 11.5-13.5 parts by weight of fatty acid soap, 0.1-0.5 parts by weight The anti-oxidant in parts by weight is mixed with 0.1-0.5 parts by weight of anti-rust agent, heated and stirred to obtain low-temperature lubricating grease;

[0048] The mineral oil is Group III oil;

[0049] The synthetic oil is ester oil and / or PAO;

[0050] Described fatty acid soap is the mixture of lithium stearate and 12-hydroxyl stearate;

[0051] The antioxidant is selected from one or more of alkylphenol antioxidants and aromatic amine antioxidants;

[0052] The antirust agent is selected from one of sulfonate compounds, alkenyl succinic acid antirust agents, higher fatty acids, higher fatty acid salts, thiadiazole antirust agents and benzotriazole antirust agents...

Embodiment 1

[0060] Add 78.3g of mineral oil 100N, 130.5g of PAO4, 52.2g of di-octyl sebacate and 39g of fatty acid soap (mass ratio of lithium stearate to lithium 12-hydroxystearate is 7:3) into the reactor , heated to 200°C, the system formed a true solution, stopped heating, added 0.9g benzotriazole and 1.5g diphenylamine, stirred for 2 minutes, poured it into an aluminum plate (area: 40cm×70cm), cooled to room temperature and used The three-roll mill grinds three times to obtain low-temperature lubricating grease.

[0061] The performance of the low-temperature lubricating grease obtained in Example 1 is analyzed, and the test results are shown in Table 1.

Embodiment 2

[0063] Add 78.3g of mineral oil 100N, 130.5g of PAO4, 52.2g of di-octyl sebacate and 39g of fatty acid soap (mass ratio of lithium stearate to lithium 12-hydroxystearate is 6.5:3.5) into the reactor , heated to 200°C, the system formed a true solution, stopped heating, added 0.9g benzotriazole and 1.5g diphenylamine, stirred for 2 minutes, poured it into an aluminum plate (area: 40cm×70cm), cooled to room temperature and used The three-roll mill grinds three times to obtain low-temperature lubricating grease.

[0064] The performance of the low-temperature lubricating grease obtained in Example 2 was analyzed, and the test results were shown in Table 1.

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Abstract

The invention provides low-temperature lubricating grease and a preparation method thereof. The low-temperature lubricating grease comprises mineral oil, synthesized oil, fatty acid soap, an antioxidant and an antirust agent. Compared with the prior art, the low-temperature lubricating grease is characterized in that semi-synthesized oil obtained by mixing III-type oil and ester oil and/or PAO (poly alpha olefin) oil is used as basic oil; the III-type oil has a high viscosity index and is high in high-temperature and low-temperature performance, oxidation stability, heat stability and evaporation performance; the ester oil and the PAO oil also have high viscosity indexes and are high in low-temperature performance; moreover, a mixture of lithium stearate and 12-hydroxy lithium stearate is used as a thickening agent for thickening the semi-synthesized oil, so that the low-temperature lubricating grease is high in low-temperature performance, and a used component can be normally lubricated under low temperature; the applicable temperature range is large; furthermore, the thickening agent is easy to synthesize.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and in particular relates to a low-temperature lubricating grease and a preparation method thereof. Background technique [0002] When the aircraft is flying in various attitudes in the air, it can be manipulated flexibly and smoothly to achieve its specific technical performance. It is compatible with the ad hoc systems equipped in the airframe, such as the motors of each power system, various instruments indicating the flight status, The electric mechanism of each transmission system and the instruments, micro-motors, electrical appliances, etc. in various electronic instruments, which are collectively referred to as "airborne products" in the aviation industry, are closely related to the technical performance. The performance of the lubricating grease selected for the lubrication parts of the components in these systems directly affects the safety and reliability of the aircraft, an...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N20/02C10N30/12C10N30/08
Inventor 赵先明赵玉贞欧阳秋卢现菊
Owner CHINA PETROLEUM & CHEM CORP
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