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Polyurea grease composite

A grease composition, a technology of polyurea grease, applied in the field of grease, can solve the problem of not mentioning oxidation stability and the like

Active Publication Date: 2005-08-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the conventional method to improve the oxidation stability of lubricating grease in the prior art is to add antioxidants, if the introduction of complex calcium-based lubricating grease or calcium-containing compounds is aimed at improving the extreme pressure performance of lubricating grease, without Mention how to improve oxidation stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0035] The preparation of the first composition of embodiment 1-3

Embodiment 1

[0037] Preparation of polyurea grease:

[0038]Take 170g of paraffin-based lubricating oil with a viscosity of 20cSt at 100°C and put it into a fat-making kettle, add 43g of dodecylamine, stir and heat, when the temperature rises to 60°C, speed up the stirring, and add 30g of MDI and 140g of base oil at the same time. After the diamine and MDI react completely, raise the temperature to 100°C, add 2ml of water, after the water has completely reacted and evaporated, continue heating to 180°C, keep the temperature for 1 hour, then heat to 220°C, add 170g of surplus quenching oil, when The temperature dropped below 70°C, and the kettle was taken out. Grind twice with a three-wheel mill.

[0039] Preparation of calcium complex grease:

[0040] Put 8kg 500SN oil (40℃ viscosity, 100℃ viscosity 11mm 2 / s) and 4kg 150BS oil (40°C viscosity, 100°C viscosity 29mm 2 / s), 1.793kg calcium hydroxide and 5kg water are added in the normal pressure kettle, stir well, add 2.233kg glacial ace...

Embodiment 2

[0043] Preparation of polyurea grease:

[0044] Take 35.5g of ester oil lubricating oil with a viscosity of 20cSt at 100°C and add it to the fat-making kettle, and add 19.8g of octadecylamine (product of Shandong China Resources Co., Ltd., industrial grade), stir and heat, when the temperature rises to 80°C, at the same time Add 9.2g of 4,4'-diisocyanate diphenylmethane (MDI, Yantai Synthetic Leather Factory, brand MT-A) into 20g of base oil in the heating kettle, add it to the fat making kettle after melting, when the temperature rises to 100 ℃, add 2ml of water, after the water and MDI completely react and evaporate, continue to heat to 160℃, keep the temperature constant for 30 minutes, add 15.5g of the remaining quenching oil, when the temperature drops below 70℃, take out the kettle. Grind twice with a three-wheel mill.

[0045] Preparation of calcium sulfonate grease:

[0046] Add 30g of 500SN base oil in the reaction kettle, add 30g of high alkali value calcium petrol...

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Abstract

Two lubricating polyurea-ester compositions with high stability and extreme-pressure antiwear performance contain proportionally basic oil, urea-based thickening agent, Ca-based thickening agent and extreme-pressure agent for composition A, or the composition A plus inorganic Ca salt for composition B.

Description

technical field [0001] The invention belongs to lubricating grease. Background technique [0002] For polyurea grease, because it does not contain metal ions that catalyze the base oil, it has good oxidation stability, but in some special occasions, such as high temperature, high speed, and long-term operation, it still needs to be added A certain amount of antioxidants. For example, US20010002388 adds conventional antioxidants to polyurea grease to improve its oxidation stability. Sometimes, in order to reduce the cost of polyurea grease and improve the extreme pressure and anti-wear properties, a certain amount of calcium complex is mixed in it, and additives are added if necessary. For example, the lubricating grease introduced in US 5,084,193 is formed by mixing a calcium-based thickener and a polyurea thickener, and is added with additives. The lubricating grease has better overall performance. US 4,830,767 introduces adding calcium phosphate and calcium carbonate to...

Claims

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Application Information

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IPC IPC(8): C10M115/08
Inventor 孙洪伟杨玮姚智勤刘大军
Owner CHINA PETROLEUM & CHEM CORP
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