Method for fabricating polyurea lithium based lubricating grease

A lithium-based grease, polyurea technology, applied in the direction of lubricating composition, base material, petroleum industry, etc., can solve the problems of inconvenient operation, unfavorable industrial promotion and application, etc., and achieve the effect of improving the performance and simplifying the process.

Inactive Publication Date: 2005-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a lot of troubles in actual production, because the two kinds of grease need to be prepared separately and then mixed mechanically, which is not easy to operate, and is also not conducive to industrial promotion and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Prepare 200g of lubricating grease with a thickener amount of 20%, including 10% of urea group and 10% of lithium organic acid.

[0017] Weigh 160g 500SN mineral oil (viscosity 11mm at 100°C 2 / s) and divided into three parts, put dodecylamine and MDI into mineral oil and heat and melt, mix and react when the temperature reaches 80°C and stir, add 12 hydroxystearic acid after the reaction is complete, wait for melting and the temperature is at 91 Add lithium hydroxide aqueous solution to react at ℃, continue heating until the temperature reaches 180℃ for 15 minutes, then heat to 200℃, add quenching oil, cool to room temperature and grind twice.

Embodiment 2

[0019] Prepare 200g of lubricating grease with a thickener amount of 18%, including 8% of urea group and 10% of lithium organic acid.

[0020] Take by weighing 164g α-olefin oil (100 ℃ viscosity 12mm 2 / s) and divided into three parts, put octadecylamine and TDI into mineral oil, heat and melt, mix and react when the temperature reaches 75°C and stir, add stearic acid after the reaction is complete, wait for melting and the temperature is at 95°C Add lithium hydroxide aqueous solution to react, continue heating until the temperature reaches 180°C for 15 minutes, then heat to 205°C, add quenching oil, cool to room temperature and grind twice.

Embodiment 3

[0022] Prepare 200g of lubricating grease with a thickener amount of 15%, including 5% of urea group, 5% of lithium stearate, and 5% of lithium benzoate.

[0023] Weigh 110g mineral oil (viscosity 12mm at 100°C 2 / s) and divided into two parts, weighed 60g ester oil as quenching oil. Put cyclohexylamine and TDI into mineral oil and heat to melt. When the temperature reaches 75°C, mix and react and stir. After the reaction is complete, add stearic acid and benzoic acid. After melting and the temperature is at 95°C, add lithium hydroxide aqueous solution To react, continue heating until the temperature reaches 180°C for 15 minutes, then heat to 205°C, add quenching oil, cool to room temperature and grind twice.

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PUM

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Abstract

This invention relates to a method for preparing carbamide-lithium base grease. It is characterized by: C8-C24 organic amine and isocyanate are melted respectively in base oil, after mixing, they are reacted, and then being added with at least one kind of C10-C20 fatty acid; after the acid being melted, adding lithium hydroxide water solution and reacting, then rising temp. to 190-220 deg.C, then proceeding temp.-keeping, cooling and homogenization. In this invention, carbamide-base grease and lithium-base grease are in same single reaction caldron at same time, so simplification prepn. process, with same result as prior art prodn. process.

Description

technical field [0001] The invention relates to a preparation method of lubricating grease. Background technique [0002] Polyurea grease is a high-performance grease, which has the characteristics of high dropping point, good oxidation stability and wear resistance; lithium-based grease is currently the grease product with the largest output and consumption, especially in the preparation of low-noise lubrication Fat has certain advantages. In US2002 / 0183213 Grease composition and rolling bearing lubricated by the grease composition, the grease prepared by mixing urea-based grease and lithium-based grease is used as low-noise grease. Mixing these two thickeners can not only improve the anti-wear performance of the grease, but also improve the low-noise performance of the grease, and can become an excellent low-noise grease. However, this method has a lot of troubles in actual production, because the two greases need to be prepared separately and then mixed mechanically, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M107/44
Inventor 杨玮孙洪伟
Owner CHINA PETROLEUM & CHEM CORP
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