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High-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and preparation method

A lithium-calcium complex and long-life technology, which is applied in the field of grease, can solve the problems of short grease soap fibers, less complex lithium-based grease, and weak fiber agglomeration into grease, achieving water resistance and extreme pressure and wear resistance The effect of capacity improvement, product quality stability and energy saving

Active Publication Date: 2013-08-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the acid destruction of the small molecule structure C 12 ~C 24 The thickening ability of the monobasic organic acid leads to shorter grease soap fibers, so that the fiber agglomeration makes the fat-forming ability weaker
Therefore, although there are currently many patents on the formulation process that can be used to form fat under laboratory conditions, there are still few lithium-complex greases that can be mass-produced through this formulation process.

Method used

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  • High-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and preparation method
  • High-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and preparation method
  • High-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 300g (15.1% by mass) of 12-hydroxystearic acid and 61g (3.1% by mass) of salicylic acid into 1600g (80.4% by mass) of base oil, mix and heat to 60-90°C , add 28g (the mass fraction is 1.4%) 70g lithium hydroxide monohydrate saponification compound of 28g (mass fraction is 1.4%) boric acid 1.5~2 hours; Use 2 hours to heat up to 185~190 ℃, this temperature constant temperature 1.5 hours; Continue to heat up to 220~240 ℃, Then cool down naturally to get the desired product. Sample number A.

Embodiment 2

[0025] With 300g (mass fraction is 14.5%) 12 hydroxystearic acid, 61g (mass fraction is 2.9%) salicylic acid and 80g (mass fraction is 3.9%) high alkali value calcium benzene sulfonate joins 1600g (the mass fraction is 77.3%) in the base oil, mix and heat to 60~90 ℃, add 28g (the mass fraction is 1.4%) boric acid 63.5g monohydrate lithium hydroxide saponification compound 1.5~2 hours; use 2 hours to heat up To 185-190°C, keep the temperature constant for 1.5 hours; continue to raise the temperature to 220-240°C, and then cool down naturally to obtain the desired product. Sample number B. It can be seen from the analysis data in Table 1 that after adding calcium alkylbenzene sulfonate with high alkali value, the bearing life of sample B is significantly longer than that of sample A and traditional lithium complex base grease. It can be seen from the drum test that sample A and traditional The complex lithium base grease is completely emulsified when it encounters water, and th...

Embodiment 3

[0027] With 300g (mass fraction is 14.5%) 12 hydroxystearic acid, 61g (mass fraction is 2.9%) salicylic acid and 80g (mass fraction is 3.9%) high alkali value calcium benzene sulfonate joins 1600g (the mass fraction is 77.3%) in the base oil, mix and heat to 60~90 ℃, add 28g (the mass fraction is 1.4%) boric acid 63.5g lithium hydroxide monohydrate and 18.6g calcium hydroxide saponification composite 1.5~2 Hours; use 2 hours to raise the temperature to 185-190°C, and keep the temperature constant for 1.5 hours; continue to heat up to 220-240°C, and then naturally cool down to obtain the desired product. Sample number C. After adding calcium hydroxide on the basis of the formula process of sample B, it can be seen from Table 1 that the dropping point of the prepared sample is greatly improved, while the life of other bearings and the performance of the roller test have little change.

[0028] (the molar weight of 12 hydroxystearic acid: the molar weight of salicylic acid: the ...

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Abstract

The invention provides a high-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and a preparation method. A thickening agent consists of 12-hydroxy stearic acid, boracic acid, salicylic acid and reactants of lithium hydroxide and calcium hydroxide, and additives comprise high-alkaline-value calcium alkyl benzene sulfonate and thiadiazole derivatives as extreme pressure agents and anti-rust agents. The 12-hydroxy stearic acid, the salicylic acid and the high-alkaline-value calcium alkyl benzene sulfonate are added into basic oil, the lithium hydroxide monohydrate of the boracic acid and the calcium hydroxide are added for carrying out saponification composition, the extreme pressure agents of thiadiazole derivatives and the anti-rust agents are sequentially added, and products are obtained after the post treatment. Because of the adoption of the proper raw material mixing ratio, the lubricating grease has good high-temperature performance,the drop point is higher than 280 DEG C, and the high-temperature long-service-life lubricating effect is reached. Simultaneously, the water-resistance capability and the extreme pressure wear resistance capability of the lubricating grease are obviously improved. The cooperative effect of the composite additives is sufficiently realized, so the high-temperature water-resistance long-service-lifecomposite lithium calcium base lubricating grease can meet the requirements of lubricating positions with the severe requirements on high and lower temperature performance, wear resistance extreme pressure performance, water resistance, mechanical stability and the like of the lubricating grease.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to a high-temperature, water-resistant and long-life lubricating grease and a preparation method thereof. Background technique [0002] Grease is a lubricant that is often used in the lubrication of mechanical equipment and plays an important role in industrial production applications. Lithium-complex grease came out in 1962, and it has become a very important type of lubricating grease, and the proportion of annual output is increasing year by year. The domestic traditional lithium complex grease mainly contains at least one C, such as sebacic acid and azelaic acid. 4 ~C 18 of binary organic acids and C 12 ~C 24 The monobasic organic acid compound, the dropping point of this kind of grease is generally higher than 260°C, but the CRC test under the high temperature condition of 160°C shows that the high temperature life of this kind of grease is not superior to that o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10M177/00C10N50/10C10N30/06
Inventor 李勇刘庆廉吴宝杰高艳青马爱民刘志颖莫林和董禄虎
Owner CHINA PETROLEUM & CHEM CORP