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A kind of lubricating grease composition and preparation method thereof

A grease composition and mixture technology, which is applied in the field of grease, can solve the problems of viscous colloidal substances, grease coking, char residue, etc., and achieve slow coking, good extreme pressure performance, and less char residue Effect

Active Publication Date: 2017-08-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurea grease has a certain anti-coking ability, but polyurea itself is an organic substance, and it is easy to form a viscous colloidal substance when used at high temperature for a long time; complex soap base has a catalytic oxidation effect on the base oil at high temperature, which is easy to cause coking of the grease
After baking at 280°C for 2 days, the polyurea grease will form a viscous colloidal substance, which is not easy to remove; the complex soap grease will form a large amount of hard char residue

Method used

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  • A kind of lubricating grease composition and preparation method thereof

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preparation example Construction

[0041] The present invention provides a kind of preparation method of the lubricating grease composition described in above-mentioned technical scheme, comprises the following steps:

[0042] mixing polyalphaolefin, polyisobutylene and silicon glycol to obtain a first mixture;

[0043] mixing the first mixture with fumed silica and keeping the temperature constant to obtain a second mixture;

[0044] The second mixture is mixed with an anti-aging agent and a solid lubricant, and then ground to obtain a grease composition.

[0045] In the present invention, polyalpha-olefin, polyisobutylene and silicon glycol are mixed to obtain the first mixture. In the present invention, there is no special limitation on the order of mixing the polyalpha-olefin, polyisobutylene and silicon glycol, preferably the polyalpha-olefin and polyisobutylene are mixed first, and then the silicon glycol is added thereto. The present invention has no special limitation on the mixing equipment, and the ...

Embodiment 1

[0059] Put 800g of base oil, in which PAO20 accounts for 52% and polyisobutylene PB2400 accounts for 48%, add it to the fat-making kettle and heat it up to 30°C, then add 30g of silicon glycol, stir while raising the temperature, after 20min the temperature rises to 150°C Stop stirring to obtain the first mixture;

[0060] When the temperature of the first mixture was raised to 155±5°C, 60 g of fumed silica was added, and stirred at constant temperature for 30 minutes to obtain the second mixture;

[0061] 100 g of molybdenum disulfide and 20 g of DNP were added to the second mixture, and stirred for 10 minutes to obtain a third mixture; the temperature of the third mixture was lowered to 50° C., and the third mixture was ground to obtain a grease composition.

[0062] The present invention performs a performance test on the obtained lubricating grease composition according to the test method described in the above technical scheme, and the test results are shown in Table 1, a...

Embodiment 2

[0064] Add 800g of base oil, in which PAO20 accounts for 57% and polyisobutylene PB2400 accounts for 43%, add it to the fat-making kettle and heat it up to 30°C, then add 30g of silicon glycol, stir while raising the temperature, and heat up to 100°C after 15 minutes Stop stirring to obtain the first mixture;

[0065] When the temperature of the first mixture was raised to 170±5°C, 60 g of fumed silica was added, and stirred at constant temperature for 35 minutes to obtain the second mixture;

[0066] Add 100g of colloidal graphite and 20g of 2,2,4-trimethyl-1,2-dihydroquinoline polymer to the second mixture, and stir for 10min to obtain the third mixture; cool the third mixture to 60°C, The third mixture is subjected to grinding treatment to obtain a grease composition.

[0067] The present invention performs a performance test on the obtained lubricating grease composition according to the test method described in the above technical scheme, and the test results are shown i...

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Abstract

The invention provides a lubricating grease composition, comprising the following components: 40wt% to 50wt% of polyalpha-olefin, 30wt% to 40wt% of polyisobutylene, 2.5wt% to 5wt% of silicon glycol, 5wt% to 10wt% fumed silicon dioxide, 1wt%-2wt% anti-aging agent and 5wt%-10wt% solid lubricant. In the present invention, polyalphaolefin and polyisobutylene are used as base oil, silicon glycol and fumed silica are used as thickening agent, anti-aging agent and solid lubricant are used as additives, and the content of each component is controlled within the above range, The lubricating grease composition has excellent high-temperature performance, and then the coking of the lubricating grease composition is slow at high temperature, and there is little coke residue after use. In addition, the grease composition provided by the invention has good extreme pressure performance.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and in particular relates to a lubricating grease composition and a preparation method thereof. Background technique [0002] Grease mainly refers to a semi-fluid to solid lubricant prepared by dispersing a thickener in a base oil. The types of grease are: calcium-based grease, sodium-based grease, calcium-sodium-based grease, general-purpose lithium-based grease, etc. Grease can be used on the friction part of mechanical parts to reduce the friction of the contact surface of mechanical parts, protect and seal the contact surface; it can also be used on the metal surface to form a protective layer on the metal surface to prevent the metal surface from rusting It can also be used for the lubrication of roller table bearings in front of heating furnaces, furnace bottom roller table bearings and various transmission parts of steel rolling systems in the metallurgical industry. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06
Inventor 赵先明赵玉贞欧阳秋卢现菊
Owner CHINA PETROLEUM & CHEM CORP
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