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Polyurea-based lubricating grease with high mechanical stability and preparation method thereof

A polyurea-based lubricating grease and benchmark technology, which is applied in the field of polyurea-based lubricating grease, can solve the problems of complex grease preparation and unfavorable industrial promotion and application, and achieve the improvement of mechanical stability, improvement of mechanical stability, and mechanical stability improved effect

Inactive Publication Date: 2012-07-18
长沙众城石油化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the preparation operation of above-mentioned lubricating grease is complicated, is unfavorable for industrial popularization and application

Method used

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  • Polyurea-based lubricating grease with high mechanical stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 300g of mineral oil with a viscosity of 20sCt at 100°C and add it to the reaction kettle, add 13.1g of octadecylamine, 13g of oleylamine, 4.8g of cyclohexylamine, and 26.1g of p-toluidine, stir and heat, when the temperature rises to 80°C, accelerate Stir, control the frequency of the frequency converter at 20Hz, add 200g of base oil and 48.8g of diphenylmethane-4,4'-diisocyanate at the same time, control the addition time for 60min, when it is completely added, control the temperature at 90°C, and react for 30min. , stir and heat, raise the temperature to 160°C, keep the temperature constant for 1 hour, then heat to melt, add 100g of base oil to cool, when the temperature drops below 80°C, take it out of the kettle and grind it three times with a three-roller machine, the product performance indicators are shown in Table 1 shown.

Embodiment 2

[0031] Take 300g of mineral oil with a viscosity of 20sCt at 100°C and put it into the reaction kettle, add 11.9g of octadecylamine, 11.8g of oleylamine, 8.82g of cyclohexylamine, and 23.7g of p-toluidine, stir and heat, when the temperature rises to 75°C, Speed ​​up the stirring, control the frequency of the inverter at 25Hz, add 200g of base oil and 49.7g of diphenylmethane-4,4'-diisocyanate at the same time, control the addition time for 45min, when it is completely added, control the temperature at 95°C, react for 60min, and the reaction is complete Afterwards, stir and heat, raise the temperature to 160°C, and keep the temperature constant for 1 hour. After that, heat to melt, add 100g of base oil to cool, and when the temperature drops below 80°C, take out the kettle and grind it three times with a three-roller machine. The product performance indicators are shown in the table 1.

Embodiment 3

[0033] Take 300g of PAO20 synthetic oil with a viscosity of 20sCt at 100°C and add it to the reaction kettle, add 19.3g of octadecylamine, 19.2g of oleylamine, 3.5g of cyclohexylamine, and 19.2g of p-toluidine, stir and heat, when the temperature rises to 80°C , speed up the stirring, control the frequency of the inverter at 20Hz, add 200g of base oil and 44.7g of diphenylmethane-4,4'-diisocyanate at the same time, control the addition time for 60min, and control the temperature at 95°C after the addition is complete, and react for 60min. After that, stir and heat, raise the temperature to 180°C, and keep the temperature constant for 1 hour. After that, heat to melt, add 100g of base oil to cool, when the temperature drops below 80°C, take out the kettle and grind it three times with a three-roller machine. The product performance indicators are as follows: Table 1 shows.

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Abstract

The invention belongs to the field of polyurea-based lubricating grease, and in particular provides polyurea-based lubricating grease with high mechanical stability and a preparation method thereof. The polyurea-based lubricating grease consists of the following components in percentage by weight: 70 to 90 percent of base oil and 10 to 30 percent of polyurea-based lubricating grease thickening agent, wherein the polyurea-based lubricating grease thickening agent is prepared by mixing diisocyanate and organic amine and directly thickening the base oil; isocyanate ions and amine ions have the same molar content; and the organic amine consists of fatty amine, naphthene amine and aromatic amine in the molar ratio of (2-4):(1-2):5. The polyurea-based lubricating grease has high mechanical stability and long service life.

Description

technical field [0001] The invention belongs to the field of polyurea-based lubricating grease, and specifically provides a polyurea-based lubricating grease with high mechanical stability and a preparation method thereof. Background technique [0002] From 1954, when Swaken et al. investigated the thermal stability and oxidation stability thickener of silicone oil, they first discovered that polyurea-based grease had excellent performance. Since then, research reports on polyurea-based greases have emerged in an endless stream. Polyurea-based grease has a variety of excellent properties, which can be summarized as: (1) good thermal stability and oxidation stability; (2) good low temperature performance; (3) good corrosion resistance and water resistance; ( 4) Good compatibility: polyurea-based grease has good compatibility with rubber and plastics, and polyurea-based grease has good compatibility with other thickeners such as bentonite. Compatibility; (5) Good colloidal s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M119/24C08G18/30C10N50/10
Inventor 廖顺曾海
Owner 长沙众城石油化工股份有限公司
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