Anti-rust extreme pressure lithium lubricating grease composition and preparation method

A technology of lithium-based lubricating grease and composition, which is applied in the field of lubricating grease containing new anti-rust and anti-corrosion agents and its preparation, and can solve the problems of poor compatibility between anti-rust and anti-corrosion agents and extreme pressure agents, reducing the extreme pressure performance of lubricating greases, etc. , to achieve the effects of excellent water resistance, low bearing operating temperature and good extreme pressure performance

Inactive Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, under normal circumstances, the anti-rust anti-corrosion agent has poor compatibility with the extreme pressure agent, which will reduce the extreme-pressure performance of the grease while improving the anti-rust and anti-corrosion performance. The present invention lies in the invention of a new anti-rust type extreme pressure agent. Lithium-based grease, while greatly improving the anti-rust performance, ensures excellent extreme pressure performance

Method used

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  • Anti-rust extreme pressure lithium lubricating grease composition and preparation method

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preparation example Construction

[0028] The preparation method steps are as follows:

[0029] 1) Heat 1 / 3 base oil, 12-hydroxystearic acid or the mixture of 12-hydroxystearic acid and stearic acid to 60-80°C, add lithium hydroxide solution, and start the reaction. The reaction time is controlled at 1 -2 hours.

[0030] 2) After the reaction is completed, stir and heat to 150-160°C, add antioxidant, continue heating to 180-220°C, add 1 / 3 base oil to cool down, continue stirring, add the rest of base oil below 140°C, add super Anti-wear agent, anti-rust and anti-corrosion agent, after stirring evenly, after processing and homogenizing three times by three-roll machine, the finished product is filled.

Embodiment 1

[0033] Thickener: 5.5%

[0034] Among them, the proportion of 12-hydroxystearic acid is 75%; the proportion of stearic acid is 25%

[0035] Base oil: 91.3% (low-sulfur paraffinic mineral oil: 100%, base oil 40°C kinematic viscosity: 82.5mm 2 / s)

[0036] Extreme pressure antiwear agent: sulfurized olefin 2.1%, phosphate ester 0.8%

[0037] Antioxidant: 2,6-di-tert-butyl-p-cresol 0.28%

[0038] Anti-rust preservative: Heptadecenylamine ethyl imidazoline 0.02%.

Embodiment 2

[0040] Thickener: 12.5%

[0041] Wherein, the proportion of 12-hydroxystearic acid is 50%; the proportion of stearic acid is 50%;

[0042] Base oil: 82.8% (of which low-sulfur paraffinic mineral oil: 77%, naphthenic oil: 23%, base oil 40 ° C kinematic viscosity: 128.4mm 2 / s)

[0043] Extreme pressure antiwear agent: sulfurized olefin 2.2%; tricresyl phosphate 1.6%

[0044] Antioxidant: diphenylamine 0.45%; 2-naphthol 0.3%

[0045] Anti-rust preservatives: Benzotriazole 0.15%.

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Abstract

The invention relates to an anti-rust extreme pressure lithium lubricating grease composition and a preparation method thereof. The composition is prepared from 5.5%-12.5% of thickening agents, 72.8%-91.3% of base oil, 0.5%-3.8% of extreme pressure anti-wear agents, 0.28%-1.25% of antioxidants and 0.02%-1.05% of anti-rust anti-corrosion agents, wherein the base oil is high-viscosity mineral oil. The preparation method of the composition comprises the steps that one third of the base oil and 12-hydroxy stearin or a mixture of 12-hydroxy stearin and stearic acid are heated to the temperature ranging from 60 DEG C to 80 DEG C, a lithium hydroxide solution is added, the temperature is raised to range from 180 DEG C to 220 DEG C after a reaction is completed, one third of quenching oil is added, the extreme pressure anti-wear agents, the anti-rust anti-corrosion agents and the rest of the base oil are added after cooling is conducted, and the composition is prepared after grounding is conducted. The novel lubricating grease containing the extreme pressure components and the anti-rust anti-corrosion components has the excellent extreme pressure property and anti-corrosion property and can be widely applied to severer environment conditions with a medium or heavy load and water.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a lubricating grease containing a novel antirust and anticorrosion agent and a preparation method thereof. This new type of anti-rust and anti-corrosion grease has excellent extreme pressure properties, anti-rust and anti-corrosion properties, and is suitable for use under severe environmental conditions with medium and heavy loads and contact with water. Background technique [0002] Grease belongs to the category of lubricants. With the continuous development of industry, the working conditions are becoming more and more complex, the load is getting heavier, and the requirements for the extreme pressure performance of lubricants are getting higher and higher. At the same time, due to the influence of external air, water and some acidic media, the equipment is extremely susceptible to corrosion, resulting in reduced performance or unusable equipment, resulting in huge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/12C10N30/06C10N30/10C10N50/10C10N40/02
Inventor 李倬张广辽郭振俊张晓凯高艳青李栋赵文峰
Owner CHINA PETROLEUM & CHEM CORP
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