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Lubricating grease with long service life, extreme pressure and high-temperature resistance and preparation method thereof

A high-temperature-resistant grease and long-life technology, used in lubricating compositions, petroleum industry, etc., can solve the problem of unsatisfactory stencil oil separation and water leaching loss indicators, high content of grease thickener, and inability to meet heavy loads requirements, etc., to facilitate large-scale industrial production, improve extreme pressure wear resistance and high temperature resistance, and improve high temperature adhesion.

Inactive Publication Date: 2018-04-24
JIANGSU LOPALTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: CN102504921A discloses a polyurea-based grease additive composition, its polyurea-based thickener is prepared by reacting isocyanate, aliphatic amine and aromatic amine in a mass ratio of 0.66:1.33:1, and the prepared polyurea-based lubricating The mechanical stability of the grease is good, but the oil separation and water leakage indicators of the steel mesh are not ideal
In addition, CN102585970B and CN103275785B both disclose a high shear stability polyurea base and a preparation method thereof. The mechanical stability of the polyurea base is improved by adjusting the ratio of various amines and introducing polyether amine respectively, but not With extreme pressure and anti-wear properties, it cannot meet the requirements of heavy loads, and the storage stability of the product is poor, and problems such as oil separation and hardening may occur
CN102604716B also discloses a urea-based grease with excellent shear stability. Because borate is used as the extreme pressure antiwear agent, surfactants are introduced to improve the water resistance of the grease, but the thickening of the grease High additive content, poor low temperature performance

Method used

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  • Lubricating grease with long service life, extreme pressure and high-temperature resistance and preparation method thereof
  • Lubricating grease with long service life, extreme pressure and high-temperature resistance and preparation method thereof
  • Lubricating grease with long service life, extreme pressure and high-temperature resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The base oil selected in this embodiment is a mixed oil of 150BS and alkylnaphthalene Synesstic 12, and the kinematic viscosity at 40°C after mixing is 160mm 2 / s, the total amount of base oil is 485kg.

[0015] Preparation:

[0016] (1) Preparation of thickener: dissolve 11.5kg of octadecylamine and 12kg of cyclohexylamine in 55°C, 100kg of the above-mentioned base oil and 22kg of diphenylmethane diisocyanate (hereinafter referred to as MDI) in 75°C, 300kg of base oil , then pour the amine solution into the MDI solution, stir and heat up to 100°C, and saponify at this temperature for 1.5 hours to obtain a thickener.

[0017] (2) Preparation of lubricating grease: Add 2.5kg of stearyl alcohol to the thickener prepared in step (1) and continue mixing and stirring for 20 minutes, then heat up to 190°C for high-temperature refining for 40 minutes, transfer to the cooling tank, add the remaining base Cool the oil to 100 ℃, then add 11.3kg Priolube3986, 2.0kg alkyl dipheny...

Embodiment 2

[0019] The base oil used in this example is a mixed oil of 500SN and alkylnaphthalene Synesstic 12, and the kinematic viscosity at 40°C after mixing is 100mm 2 / s, the total amount of base oil is 366kg.

[0020] Preparation:

[0021] (1) Preparation of thickener: Dissolve 20.60kg n-octylamine and 22.4kg aniline in 50°C, 100kg of the above base oil and 55kg of MDI in 80°C and 200kg of the above mixed base oil, then pour the amine solution into MDI In the solution, stir and heat up to 105°C, and saponify at this temperature for 2 hours to obtain a thickener.

[0022] (2) Preparation of lubricating grease: Add 3.0 kg of stearyl alcohol to the thickener prepared in step (1) and continue mixing and stirring for 30 minutes, then raise the temperature to 195°C for high-temperature refining for 30 minutes, transfer to the cooling kettle, add the remaining base Cool the oil to 95°C, then add 40kg of Ketjenlube 135, 3.0kg of phenyl-α-naphthylamine, 15kg of Additin RC8400 and 2.5kg of ...

Embodiment 3

[0024] The base oil selected in this embodiment is a mixed oil of poly-alpha olefin PAO40 and alkylnaphthalene Synesstic 12, and the kinematic viscosity of the mixed oil at 40°C is 220mm 2 / s, the total amount of base oil is 409kg.

[0025] Preparation:

[0026] (1) Preparation of thickener: Dissolve 19.5kg octadecylamine, 24.5kg aniline in 55°C, 100kg of the above base oil and 45kg of MDI in 75°C, 250kg of the above mixed base oil, then pour the amine solution into the MDI In the solution, stir and heat up to 115°C, and saponify at this temperature for 1.5 hours to obtain a thickener.

[0027] (2) Preparation of lubricating grease: Add 3.0kg of stearyl alcohol to the thickener prepared in step (1) and continue mixing and stirring for 20 minutes, then heat up to 190°C for high-temperature refining for 30 minutes, transfer to the cooling tank, add the remaining base Cool the oil to 110°C, then add 16.5kg Priolube3986, 2.75kg phenyl-α-naphthylamine, 27.25kg Additin RC8400 and ...

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Abstract

The invention discloses lubricating grease with long service life, extreme pressure and high-temperature resistance and a preparation method thereof. The lubricating grease comprises the following components in percentages by weight: 8.1 to 18.6% of a thickening agent, 0.3 to 0.7% of fatty alcohol, 2 to 10% of dibasic acid polyester, 0.3 to 1.5% of an antioxidant, 0.3 to 1.0% of a metal deactivator and 2 to 5% of an extreme-pressure antiwear agent, with the balance being base oil. The invention has the following advantages: the lubricating grease has excellent high-temperature resistance, shear stability and extreme-pressure wear resistance and good storage stability, adhesiveness and low-temperature fluidity; the requirement of a bearing for lubricating under various working conditions ofhigh temperature, high speed, heavy load and even impulse load can be met; a grease exchange period can be prolonged; meanwhile, the preparation process for the lubricating grease is simple, and facilitates large-scale industrial production.

Description

technical field [0001] The present invention relates to a lubricating grease and a preparation method thereof, in particular to a long-life extreme pressure and high temperature resistant lubricating grease and a preparation method thereof. Background technique [0002] With the rapid development of modern industrial technology and equipment, the requirements for lubricating materials will become increasingly stringent, especially for mechanical equipment that operates continuously under high-load, low-speed, high-temperature and water-contact environments. In order to improve production efficiency and reduce production costs, the Grease puts forward a series of performance requirements such as: long life, excellent shear stability, water resistance, oxidation stability, high temperature resistance, etc. Polyurea-based grease refers to a type of grease that contains urea groups in the thickener molecules. It does not contain metal ions, overcomes the lack of catalytic action...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/06C10N30/08
CPCC10M169/00C10M2203/065C10M2207/021C10M2209/102C10M2215/064C10M2215/065C10M2215/1026C10M2215/223C10M2217/045C10M2219/106C10N2030/06C10N2030/08
Inventor 杨操
Owner JIANGSU LOPALTECH
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