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Lubricating grease special for constant-speed universal joint and preparing method thereof

A technology for lubricating grease and universal joints, which is applied in the field of low-cost and high-performance CVJ lubricating grease and its preparation. The effect of extreme pressure and anti-wear

Active Publication Date: 2012-09-12
杭州得润宝油脂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the development of the automobile industry, people continue to demand low-cost high-performance greases that can reduce friction, improve vibration performance and CVJ performance. However, a major defect of solid additives such as molybdenum disulfide is that they cannot be fully dispersed in grease. And can be separated from the grease under some harsh conditions
High-efficiency organic molybdenum compounds (such as molybdenum dialkyldithiocarbamate), thiadiazolyl compounds, etc. are effective but expensive, so it is difficult to reduce the cost of greases using these additives
Furthermore, even with these high-efficiency additives, they are not always satisfactory under the severe operating conditions generated by today's high-performance vehicles

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0019] The preparation of the ureido grease is as follows: base oil and at least one of 4,4'-diphenylmethane diisocyanate or 2,4-tolyl diisocyanate are mixed, heated and dissolved, and then added to dissolve in base oil beforehand Good long-chain fatty amines (such as octadecylamine, decylamine, dodecylamine, tetradecylamine, octylamine, hexadecylamine, etc.) amine, etc.) to react with a mixture, slowly raise the temperature to 120-180°C and keep it warm for a period of time, then cool down to 80-110°C, cool it out of the kettle, and set it aside for later use.

[0020] The invention belongs to a new lubricating grease composition for CVJ. A large number of studies have shown that a special base oil with excellent high and low temperature performance and rubber compatibility is thickened by compounding lithium-calcium complex and urea-based grease in a certain proportion. Combination, and adding a compound of high-efficiency borate extreme-pressure anti-wear agent and phosphor...

Embodiment 1

[0031] Combine 47.5g of 4,4'-diphenylmethane diisocyanate with 266.0g of 40°C viscosity of 90-110mm 2 / s of paraffin-based mineral oil, 400.0g 40 ℃ viscosity of 400 ~ 500mm 2 / s naphthenic mineral oil mixed evenly, heated and stirred until dissolved at 70-80°C, then added 25.5g octadecylamine and 28.3g dissolved in 133.7g aforementioned paraffinic mineral oil and 201g aforementioned naphthenic mineral oil For the mixture of cyclohexylamine, slowly heat up to 140-160°C and keep it warm for 5-10 minutes, then cool it down for later use.

[0032] Mix 132.7g 12-hydroxystearic acid with 786.5g at 40°C with a viscosity of 150-180mm 2 / s of synthetic hydrocarbons and synthetic oils are mixed, heated and stirred to dissolve at 90°C, add a mixture of 3.4g of calcium hydroxide and 15.8g of lithium hydroxide monohydrate dissolved in 1.3 to 1.5 times of water, and slowly raise the temperature to 130 to 140°C for reaction. Then add 44.2g of sebacic acid, continue to heat up to 130-140°C,...

Embodiment 2

[0034] Mix 47.3g of 4,4'-diphenylmethane diisocyanate with 667.0g of 40°C with a viscosity of 430-500mm 2 / s naphthenic mineral oil mixed evenly, heated and stirred until dissolved at 70-80°C, then added the mixture of 25.7g octadecylamine and 28.5g cyclohexylamine dissolved in 333.0g of the aforementioned naphthenic mineral oil, slowly Raise the temperature to 140-160°C and keep it warm for 10 minutes, then cool it down for later use.

[0035] Mix 68.2g12-hydroxystearic acid with 745g430~500mm 2 / s naphthenic mineral oil, 405g 40℃ viscosity is 90~100mm 2 / s of paraffin-based mineral oil was mixed, heated and stirred to 90°C to dissolve, and a mixture of 1.9g of calcium hydroxide and 7.8g of lithium hydroxide monohydrate dissolved in 1.5 times of water was added, and the temperature was slowly raised to 130-140°C for reaction, and then 22.5 g sebacic acid, continue to heat up to 130-140°C, then add 9.8g of lithium hydroxide monohydrate dissolved in 1.5 times of water for rea...

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PUM

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Abstract

The invention relates to lubricating grease special for a constant-speed universal joint and a preparing method thereof. The lubricating grease comprises base oil and thickener which is compounded by lithium-calcium composite and uramido composite, and the lubricating grease also contains: (a) borate extreme pressure anti-wear agent, (b) aliphatic amine derivative multi-effect friction modifying agent, (c) phosphoric extreme pressure anti-wear agent, (d) diphenylamine antioxidant and (e) viscosity index improver; wherein the base oil is mineral oil that accounts for 70 to 95 percent of the total weight of the lubricating grease, synthetic oil or the mixture of the mineral oil and the synthetic oil in optional proportion. The thickener which is compounded by the lithium-calcium composite and the uramido composite accounts for 1 to 25 percent of the total weight of the lubricating grease; and the lubricating grease has excellent extreme pressure anti-wear property, thermal stability, oxidation stability, water resisting property, mechanical stability, shear stability, anticorrosion property, and the like, and the lubricating grease can meet the lubricating demands of the constant-speed universal joint of automobiles and has low cost and high efficiency.

Description

technical field [0001] The invention relates to a special lubricating grease for constant velocity universal joints (CVJ) and a preparation method thereof, specifically, a low-cost and high-performance CVJ lubricating grease and a preparation method thereof. Background technique [0002] In 1959, the world's first front-wheel drive car was born. Because front-wheel drive vehicles have the advantages of low energy consumption and low vibration, after nearly 50 years of development, almost all family cars, off-road vehicles and some trucks have adopted front-wheel drive or four-wheel drive. Therefore, the CVJ, which is the main component for realizing front-wheel drive or four-wheel drive, has also been more and more widely used. In order to reduce energy consumption, reduce vibration, and expand the use space, CVJ is developing in the direction of miniaturization, light weight and increased fixed angle. This requires that the corresponding CVJ grease has better vibration re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10M123/02C10M141/12C10M125/26C10M177/00C10N40/04C10N30/00C10N30/10C10N30/08C10N30/06
Inventor 李辉李元正
Owner 杭州得润宝油脂股份有限公司