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Lubricating grease for shear-resistant bearings, and preparation method thereof

A technology of bearing lubrication and shear resistance, which is applied in the field of grease, can solve problems such as reducing vibration and grease performance defects, and achieve the effects of simple production equipment, improved anti-wear and anti-corrosion performance, and high shear stability

Inactive Publication Date: 2018-01-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a bearing grease that satisfies high mechanical shear performance, has good water resistance and corrosion resistance, and has a long service life at the same time, so as to solve the problem of performance defects of the existing single lithium-based bearing grease, It can meet the requirements of bearing self-lubrication and excellent water resistance of lubricants, and play the role of reducing vibration, anti-shear, anti-wear and protection

Method used

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  • Lubricating grease for shear-resistant bearings, and preparation method thereof
  • Lubricating grease for shear-resistant bearings, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 2.9g of diphenylmethane diisocyanate and 270g of PAO base oil to reactor A and heat up to 50°C. After diphenylmethane diisocyanate is completely melted, add 9.2g of stearylamine melted in 270g of PAO base oil and cyclic Hexylamine 7.9g. After the reaction, raise the refining temperature to 90°C. After constant temperature for 1h, add 280g of PAO base oil and 160g of lauryl hydroxystearic acid to the B reaction kettle, raise the temperature to 80°C, and wait for the dodecyl hydroxystearic acid After the fatty acid is completely melted, it is poured into the A reactor, and at the same time, 22.4 g of LiOH aqueous solution is started to be added dropwise to the A reactor, and the control time is 0.5 h. After the end, add 1g of water and rise to the highest refining temperature to 185°C. After constant temperature for 1 hour, add 5g of diisooctyldiphenylamine and 5g of diphenylamine, cool down to 85°C naturally, add 10g of triphenyl phosphate and 10g of barium dinonylna...

Embodiment 2

[0032] Add 2.9g of diphenylmethane diisocyanate and 260g of PAO base oil to reactor A and heat up to 50°C. After diphenylmethane diisocyanate is completely melted, add 9.2g of octadecylamine melted in 260g of PAO base oil and cyclic Hexylamine 7.9g. After the reaction, the refining temperature was raised to 90°C. After the temperature was kept constant for 1 hour, 280g of PAO base oil and 180g of lauryl hydroxystearic acid were respectively added to the B reactor, and the temperature was raised to 80°C. After the fatty acid is completely melted, it is poured into the A reactor, and at the same time, 25.2 g of LiOH aqueous solution is started to be added dropwise to the A reactor, and the control time is 0.5 h. After the end, add 1g of water and rise to the highest refining temperature to 185°C. After constant temperature for 1 hour, add 5g of diisooctyldiphenylamine and 10g of 2,6-di-tert-butyl-p-cresol, cool down to 85°C naturally, add 10g of tricresyl phosphate and 5g of bar...

Embodiment 3

[0034] Add 2.9g of diphenylmethane diisocyanate and 250g of PAO base oil to reactor A and heat up to 50°C. After diphenylmethane diisocyanate is completely melted, add 9.2g of octadecylamine melted in 250g of PAO base oil and cyclic Hexylamine 7.9g. After the reaction, the refining temperature was raised to 90°C. After constant temperature for 1 hour, 200g of lauryl hydroxystearic acid melted from 280g of PAO base oil was added to the reactor B, and the temperature was raised to 80°C. After the stearic acid is completely melted, it is poured into the A reactor, and at the same time, 28g of LiOH aqueous solution is added dropwise to the A reactor, and the control time is 0.5h. After the end, add 1g of water and rise to the highest refining temperature to 185°C. After constant temperature for 1 hour, add 5g of diisooctyldiphenylamine, cool down to 85°C naturally, add 5g of tricresyl phosphate and 10g of barium sulfonate and stir well. After the three-roll machine grinds for one...

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Abstract

The invention relates to a lubricating grease for shear-resistant bearings, and a preparation method thereof. The preparation method comprises the following steps: adding diphenylmethane diisocyanateand a part of base oil into a reaction kettle A according to a ratio of a polyureido group to a lithium base being 1:8 to 1:10, heating the reaction kettle to 50 DEG C, adding two amines molten by a part of the base oil after the diphenylmethane diisocyanate is completely molten, carrying out a reaction, heating the reaction kettle A to a refining temperature of 90 DEG C, keeping the temperature unchanged for 1 h, adding the remaining base oil and all 12-hydroxystearic acid into a reaction kettle B, heating the reaction kettle to 80 DEG C, pouring the obtained mixture into the reaction kettleA after the 12-hydroxystearic acid is completely molten, and dropwise adding an aqueous solution of LiOH into the reaction kettle A to carry out saponification for 0.5 h; adding 0.1% of water after the saponification is finished, and heating the reaction kettle A to 185 DEG C; and keeping the temperature unchanged for 1-2 h, adding an antioxidant, naturally cooling the reaction kettle to 85 DEG C,adding other additives, uniformly stirring above substances, carrying out rolling oil fine filtration, and filling the finished degassed finished product.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to bearing lubricating grease with shear resistance and roller stability and a preparation method. Background technique [0002] In recent years, the output of our sealed bearings has been increasing year by year, and the performance requirements for them are also increasing. In addition to the design, manufacture and material factors of the sealed bearing, the quality of the sealed bearing depends to a large extent on the performance of the grease used. For the existing grease products, it mainly includes lithium soap and polyurea. However, as the use of sealed bearings is becoming more and more widespread, the working conditions of bearings are becoming more and more severe. [0003] For lithium-based bearing products, the main features of this type of product are that the fibers are soft, easy to filter, and can easily meet the requirements for reducing vibration val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M177/00C10N30/06C10N40/02C10N30/12
Inventor 王顺顺刘建龙孙毅申明主
Owner CHINA PETROLEUM & CHEM CORP
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