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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.

Inactive Publication Date: 2005-12-07
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 decrease with the operation. It takes 60-120 seconds or even longer to detect accurate vibration value data, which affects the bearing. production efficiency

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

A method for preparing low-noise urea-based lubricating grease, comprising: mixing and reacting organic amine and isocyanate with base oil, adding cold oil to rapidly cool the material after the temperature of the material rises to 100-150°C, and grinding to form grease. Wherein the organic amine is a mixture of aliphatic amines with 10-20 carbons and aromatic amines with 6-8 carbons, the molar ratio of the two is 0.25-4:1, and the amount of cold oil is 5%- 35%, said base oil is mineral oil or polyalphaolefin oil with a viscosity of 4-40cSt at 100°C. The urea-based lubricating grease prepared by the method of the invention has a stable vibration value, can detect and obtain accurate vibration value data in a short time (10-20 seconds), and is obviously helpful for improving the production efficiency of the bearing.

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