Wide temperature range and high extreme pressure composite lithium lubricating grease composition

A lubricating grease and lithium-composite technology, which is applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of high dropping point, low-temperature and extreme-pressure properties of lubricating grease, and cannot meet the requirements of lubricating grease. and other problems, to achieve the effect of excellent high and low temperature performance, excellent extreme pressure and anti-wear performance

Active Publication Date: 2011-11-23
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing inventions, there are more researches on the formulation and production process of the lithium complex thickener, but less research on the high and low temperature properties and extreme pressure properties of greases, so they cannot meet the needs of greases in use. Higher requirements in the process
In CN101705141 A, a kind of preparation method of complex lithium base lubricating grease is introduced, and there is a higher dropping point; Among CN101481637 A, a kind of preparation method of making complex lithium base lubricating grease by low temperature method is introduced; Special instructions for extreme pressure and anti-wear properties and low temperature properties

Method used

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  • Wide temperature range and high extreme pressure composite lithium lubricating grease composition
  • Wide temperature range and high extreme pressure composite lithium lubricating grease composition
  • Wide temperature range and high extreme pressure composite lithium lubricating grease composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Add 300g of base oil into a small test kettle, heat up to 85°C, add 60g of dodecyl hydroxystearic acid and 16g of sebacic acid, then add 16g of lithium hydroxide dissolved in 80g of water, heat up to 105-115°C for reaction 2h. Then raise the temperature for dehydration, raise the temperature to 130-140 and keep the temperature for 0.5h, continue to raise the temperature, add 4.2g of diisooctyldiphenylamine, the highest temperature is 208°C. Add 160g of base oil to lower the temperature. When the temperature drops below 150°C, add the remaining 304g of base oil. When the temperature is lower than 90°C, add 8.4g of barium petroleum sulfonate, 4.2g of thiadiazole derivatives, and 42g of dialkyl dithio Carbamate, 25.2 g phosphorothioate, 4.2 g zinc dialkyldithiophosphate. Finally, grind and homogenize on three-axis rollers, and measure the grease performance.

[0036] The performance of the lubricating grease that process formula of the present invention makes is listed i...

example 2

[0040] Add 450g of base oil into a small test kettle, heat up to 85°C, add 80g of lauryl hydroxystearic acid and 40g of azelaic acid, then add 30g of lithium hydroxide dissolved in 110g of water, heat up to 100-110°C for reaction 2.5h. Then heat up for dehydration, heat up to 125-135°C for 45 minutes, continue to heat up, add 8g of diisooctyldiphenylamine and 8g of tert-butylphenol derivatives, and the maximum temperature is 200°C. Add 150g of base oil to cool down. When the temperature drops below 150°C, add the remaining 80g of base oil and 0.4g of benzotriazole. When the temperature is lower than 90°C, add 4g of dialkyl dithiocarbamate, 9.6 g phosphorothioate, 24 g zinc dialkyldithiophosphate, 8 g borate. Finally, grind and homogenize on three-axis rollers, and measure the grease performance.

[0041] The performance of the lubricating grease that process formula of the present invention makes is listed in table 2

[0042] Table 2

[0043]

[0044]

example 3

[0046] 300g of poly-α-olefin synthetic oil is added in the small test kettle, the temperature is raised to 85°C, 60g of dodecyl hydroxystearic acid and 35g of dodecanedibasic acid are added, and then 21g of lithium hydroxide dissolved in 120g of water is added, Raise the temperature to 105-115°C for 3 hours. Then raise the temperature for dehydration, raise the temperature to 130-140°C for 1 hour, continue to raise the temperature, add 6g of diisooctyldiphenylamine, and the maximum temperature is 220°C. Add 235g of base oil to cool down. When the temperature drops below 150°C, add the remaining 220g of base oil and 0.8g of benzotriazole. When the temperature is lower than 90°C, add 17g of dialkyl dithiocarbamate, 4.25 g phosphorothioate, 25.5 g borate. Finally, grind and homogenize on three-axis rollers, and measure the grease performance.

[0047] The performance of the lubricating grease that process formula of the present invention makes is listed in table 3

[0048] tab...

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Abstract

The invention relates to a wide temperature range and high extreme pressure composite lithium lubricating grease composition. The composite lithium-based lubricating grease composition provided by the invention is prepared from poly-alpha-olefin synthetic oil and ester oil as base oils and two-component composite lithium soap as a thickening agent, and an antioxidant, an anticorrosion and antirust agent and an extreme-pressure anti-wear additive are added. Due to the appropriate proportion of raw materials, the lubricating grease has excellent high and low temperature performance, the dropping point is greater than 260 DEG C, and the low-temperature (-40 DEG C) torque is not higher than 0.98 N.m during starting and is not higher than 0.50 N.m during running; the lubricating grease also has excellent extreme-pressure anti-wear properties, the sintering capacity is not lower than 3089 N, the Timken 0K value is up to 267 N, and the anti-wear performance (tested by a four-ball machine method) is not greater than 0.60 mm. Therefore, the lubricating grease provided by the invention can be used for lubricating high-load equipment within a wide temperature range.

Description

technical field [0001] The invention relates to a complex lithium-based lubricating grease composition with excellent extreme pressure and anti-wear properties, which is composed of base oil, thickener and additives and can be used in a wide temperature range. Background technique [0002] With the development of modern industry, especially the continuous upgrading and replacement of technology and equipment in metallurgy, automobile, mining and other industries, the requirements for high temperature performance of lubricating grease are getting higher and higher. Equipment that needs to be used outdoors also has high requirements for low temperature performance, and some equipment requires a minimum operating temperature of -40°C or even lower. In order to improve production efficiency and reduce costs, in metallurgy, mining, automobile and other industries, equipment large-scale, automation, and heavy-duty are a development trend, which puts forward higher requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/06C10N50/10C10M141/10
Inventor 郭振俊吴宝杰刘庆廉刘翠苹高思嘉李卓刘洋
Owner CHINA PETROLEUM & CHEM CORP
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