Method for preparing low-noise carbamido lubricating grease

A urea-based grease, low-noise technology, applied in the field of preparation of urea-based grease, can solve the problems of unstable vibration value of the grease, affecting the production efficiency of bearings, etc., and achieve the effect of improving production efficiency and shortening detection time.

Active Publication Date: 2005-02-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vibration value of the lubricating grease made by this method is unstable, usually the initial vibration value is high, and it will gradually decrea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] First add octadecylamine (64.4g) and p-toluidine (25.6g) to 373g polyalpha-olefin oil (viscosity 16.1cSt at 100°C), heat to 60°C to completely melt the organic amine; -Add MDI (59.9g) to the olefin oil, and heat until the MDI melts; then add the MDI-oil to the organic amine-oil, stir well to make the organic amine and isocyanate react completely, when the temperature rises to 110°C, stir And keep the temperature constant for 30 minutes; finally, add 373g of polyalphaolefin oil as cold oil to rapidly cool down the lubricating grease in the kettle. The prepared urea-based grease was ground three times on a three-roll mill to form fat.

example 2

[0014] First add dodecylamine (8.9g) and m-chloroaniline (6.1g) into 212.5g of mineral oil (viscosity 11cSt at 100°C), heat to 60°C to completely melt the organic amine; then add MDI (12.2g), while heating until the MDI melts; then add the MDI-oil to the organic amine-oil, stir well to make the organic amine and isocyanate react completely, then keep the temperature at 120°C, and stir for 30min at a constant temperature; finally, Add 30g of mineral oil as cold oil to cool the grease in the kettle rapidly. The prepared urea-based grease was ground three times on a three-roll mill to form fat.

example 3

[0016] First, octadecylamine (12.4g) and o-ethylaniline (16.7g) were added to 202.5g polyalphaolefin oil (viscosity 8.0cSt at 100°C), and heated to 60°C to completely melt the organic amine; Add TDI (16.3g) to the polyalphaolefin oil, and heat until the TDI melts; then add the TDI-oil to the organic amine-oil, stir well to make the organic amine and isocyanate completely react, when the temperature rises to 140°C , stirring at a constant temperature for 30 minutes; finally, add 50 g of polyalphaolefin oil as cold oil to rapidly cool the lubricating grease in the kettle. The prepared urea-based grease was ground three times on a three-roll mill to form fat.

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PUM

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Abstract

The invention is a kind of preparation methods to produce carbamido consistent grease with low noise. The approach follows this. Mix organo amine with isocyanic ester and base oil and they will reactive, when the batch heat rises to 100-150 degree, add cold oil in order to cool auxiliary product rapidly. Later, whet the outcome to produce fat. The organo amine is a kind of asmixture by fat amine which carbon number is 10-20 and aromatic amine which carbon number is 6-8, the both mol ratio is 0.25-4:1. The cold oil's use level is 5%-35% of base oil's. the base oil is mineral oil which temperature is 100 degree and coefficient of viscosity is 4-40cSt or assemble A-alkene oil. The carbamido consistent grease in this way has a equable libration value, the libration data can be got within 10-20 seconds exactly, so it can improve production efficiency of bearing obviously.

Description

technical field [0001] The invention belongs to a preparation method of urea-based lubricating grease. technical background [0002] With the requirements of miniaturization, light weight, precision, low noise and long life of mechanical equipment, the rotating parts of the machine are not only smaller in size and faster in rotation speed, but also densely arranged in parts, making the ambient temperature very high. Such harsh working conditions place strict requirements on the grease used. For general lithium-based grease, although it has good low-noise characteristics, it cannot meet the requirements of heat resistance and long life. Although urea-based grease has many excellent properties, such as thermal stability, oxidation stability, colloidal stability, mechanical stability, etc., it is also widely used in many industries, but the acoustic performance of urea-based grease is poor. , cannot meet the requirements. [0003] Therefore people have taken many ways to imp...

Claims

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Application Information

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IPC IPC(8): C10M105/56
Inventor 姚立丹杨海宁
Owner CHINA PETROLEUM & CHEM CORP
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