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Ultrahigh-temperature lubricating grease composition and preparation method thereof

A grease composition and the technology of the composition are applied in the directions of lubricating compositions, petroleum industry, etc., which can solve the problems of inability to improve the high-temperature anti-oxidation performance of grease, affecting the use, etc., and achieve the effect of good high-temperature anti-oxidative performance.

Inactive Publication Date: 2012-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above literature mentions that adding a certain amount of antioxidant can improve the anti-oxidation performance of lubricating grease, the combination of general antioxidants and antioxidants cannot improve the high-temperature anti-oxidation performance of lubricating grease, especially when the temperature is > 200 °C , and when used for a long time, when the temperature is > 200°C, the general lubricating grease will turn black and harden in a short period of time, and some oil will separate out, indicating that the lubricating grease has oxidized at high temperature , affecting its use in high temperature environments

Method used

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  • Ultrahigh-temperature lubricating grease composition and preparation method thereof
  • Ultrahigh-temperature lubricating grease composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Prepare lithium complex grease according to the raw materials and reaction conditions shown in Table 1: 263 grams of benzyl silicone oil is added in the saponification kettle, then 97.2 grams of 12-hydroxystearic acid and 32.7 grams of sebacic acid are added to the saponification kettle, Heat and stir until the saponification temperature is 95°C, gradually add the dissolved lithium hydroxide aqueous solution into the saponification kettle (27.2 g lithium hydroxide + 90 g water), fully stir for saponification and dehydration, gradually add 263 g of benzyl silicone oil, and heat up After reaching the highest refining temperature of 210°C, keep the temperature constant for 20 minutes, add the remaining 264 grams of benzyl silicone oil to cool down, and add 20 grams of T202, 30 grams of phenothiazine, and 30 grams of T351, and the reactants are ground by a three-wheel mill to obtain grease sample.

Embodiment 2

[0023] Prepare lithium complex grease according to the raw materials and reaction conditions shown in Table 1: 260 grams of ethyl silicone oil are added in the saponification kettle, then 89.7 grams of 12-hydroxystearic acid and 30.2 grams of sebacic acid are added into the saponification kettle, heated And stir until the saponification temperature is 90°C, gradually add the dissolved lithium hydroxide aqueous solution into the saponification kettle (25.1 g of lithium hydroxide + 80 g of water), fully stir for saponification and dehydration, gradually add 260 g of ethyl silicone oil, and raise the temperature to the highest After the refining temperature is 200°C, keep the temperature constant for 10 minutes, add the remaining 260 grams of ethyl silicone oil to cool down, and add 20 grams of T203, 30 grams of T541, and 50 grams of T351. The reactants are ground by a three-wheel mill to obtain a grease sample.

Embodiment 3

[0025] Prepare lithium complex grease according to the raw materials and reaction conditions shown in Table 1: 260 grams of polyether oil are added in the saponification kettle, then 97.2 grams of 12-hydroxystearic acid and 32.7 grams of azelaic acid are added into the saponification kettle, heated And stir until the saponification temperature is 85°C, gradually add the dissolved lithium hydroxide aqueous solution into the saponification kettle (27.2 grams of lithium hydroxide + 90g water), fully stir for saponification and dehydration, gradually add 260 grams of polyether oil, and heat up to the highest After the refining temperature is 210°C, keep the temperature constant for 15 minutes, add the remaining 260 grams of polyether oil to cool down, and add 10 grams of T203, 30 grams of phenothiazine, and 30 grams of T351, and the reactants are ground by a three-wheel mill to obtain a grease sample.

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Abstract

The invention relates to an ultrahigh-temperature lubricating grease composition and a preparation method thereof. The ultrahigh-temperature lubricating grease composition is composed of, by total weight of lubricating grease, (1) 60%-94% of base oil selected from one or more of synthetic hydrocarbon oil, silicone oil, ether oil and fluorocarbon oil, (2) 5%-20% of composition lighium-base thickening agent, and (3) 1%-20% of a composition antioxidation additive composed of at least two of sulfur-phosphorus-zinc salt, phenothiazine, organic copper salt and sulfurized carbamic molybdenum salt. The ultrahigh-temperature lubricating grease composition is not blackened or hardened during roasting test for longer than 100h at 250 DEG C, and oil separation is avoided, so that the ultrahigh-temperature lubricating grease composition can be used for a long time at the temperature of higher than 200 DEG C.

Description

technical field [0001] The present invention relates to a lubricant, more specifically a grease composition. Background technique [0002] With the development of modern industry, requirements such as high temperature resistance and long life have been put forward for lubricating grease, so as to meet the lubrication of modern mechanical parts. For example, some equipment needs to be used under the condition that the ambient temperature is higher than 200°C, which requires the grease to have good high-temperature lubrication performance, and it will not harden or lose under the condition of long-term use at >200°C. [0003] It is mentioned in some documents that a certain amount of antioxidant is added to the grease to improve the high-temperature anti-oxidation performance of the grease so that it can be used in a high-temperature environment. For example, CN101240211 mentions a nano-silica grease, in which the base oil It is silicone oil, synthetic hydrocarbon oil or P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M177/00C10N50/10C10N30/10
Inventor 杨海宁姚立丹孙洪伟段庆华
Owner CHINA PETROLEUM & CHEM CORP