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Preparation of high dropping point carbamido grease lubricant and obtained product

A technology of high dropping point urea-based grease and grease, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problem of limiting the application range of grease, improve extreme pressure and anti-wear performance, small oil separation, Appearance improvement effect

Active Publication Date: 2008-04-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to black graphite or MoS 2 The addition of additives such as additives limits the scope of use of this type of grease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 170g of paraffin-based lubricating oil with a viscosity of 20cSt at 100°C and add it to the grease making kettle, then add 25g of black molybdenum disulfide solid powder, and add 43g of dodecylamine, stir and heat, when the temperature rises to 60°C, speed up the stirring , add 30g MDI and 140g base oil at the same time, when dodecylamine and MDI completely react, heat up to 100°C, add 2ml of water, after the water and MDI completely react and evaporate, continue heating to 180°C, add 170g balance to quench Oil, when the temperature drops below 70°C, take it out of the kettle. Grind twice with a three-wheel mill. The performance is shown in Table 1.

Embodiment 2

[0016] Take 270g of paraffin-based lubricating oil with a viscosity of 20cSt at 100°C and add it to the fat-making kettle, then add 18g of molybdenum dialkyldithiocarbamate, and add 68g of octadecylamine (product of Shandong China Resources Co., Ltd., industrial grade), stir and heat , when the temperature rises to 80°C, speed up the stirring, and add 140g of base oil and 22g of toluene diisocyanate (TDI-2, 4, the product of Shanghai Reagent No. 1 Factory, chemically pure) at the same time. To 100°C, add 2ml of water, after the water and TDI have completely reacted and evaporated, continue heating to 220°C, add 100g of the remaining quenching oil, when the temperature drops below 70°C, take out the kettle. Grind twice with a three-wheel mill. The appearance of the product is transparent, and its properties are shown in Table 1.

Embodiment 3

[0018] Get 170g of poly-α-olefin base oil with a viscosity of 10cSt at 100°C and add it to the fat-making kettle, then add 20g of graphite solid powder therein, and add 43g of dodecylamine, stir and heat, when the temperature rises to 60°C, speed up the stirring, Add 30g of MDI and 140g of base oil at the same time, when dodecylamine and MDI have completely reacted, heat up to 100°C, add 2ml of water, after the water has completely reacted and evaporated, continue heating to 180°C, add 170g of remaining quenching oil, When the temperature drops below 70°C, take out the kettle. Grind twice with a three-wheel mill. The performance is shown in Table 1.

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Abstract

The invention provides a preparation process for high drop point ureido grease, wherein, the base oil, the solid additive powder, the organic amine and the diisocyanate are mixed between 50 DEG C and 100 DEG C to react, then added with the quench oil when the temperature rises between 160 DEG C and 220 DEG C and is then cooled to be taken out of a kettle. The grease obtained by the invention is taken as one hundred percent of total weight and comprises the following compositions: the weight of the base oil accounts for 70 to 90 percent, the ureido thickening agent produced by the reaction of the organic amine and the diisocyanate has a weight accounting for 5 to 25 percent, and the weight of the solid additive powder accounts for 0.1 to 10 percent. The grease obtained by the process has a drop point which is more than 330 DEG C and has good extreme pressure anti-abrasion performance as well as corrosion resistance performance.

Description

technical field [0001] The invention relates to urea-based lubricating grease and a preparation method thereof. Background technique [0002] When Swaken et al. investigated the thermal stability and oxidation stability of silicone oil in 1954, they first found that polyurea thickener has excellent properties, such as good water resistance, heat resistance, oxidation stability, and long service life. , wide range, is an ideal multi-purpose, long-life grease. Since then, research reports on polyurea grease have emerged in an endless stream. Since it is difficult to make grease with a high dropping point from a symmetrical diurea, an asymmetric structure is generally used. JP 1139696 (Ping 1-139696) prepares high dropping point diurea grease by changing the structure of diisocyanate, EP0274756 uses primary amine and primary alcohol to react with diisocyanate to prepare urea-urethane as thickener High dropping point grease, US 5158694 makes polyurea grease with diisocyanate,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M133/04C10M133/22
Inventor 孙洪伟刘大军龙军姚智勤康茵吕伟王金凤杨玮
Owner CHINA PETROLEUM & CHEM CORP
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