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Organic lithium soap composite urea-based lubricating grease and preparation method thereof

A compound urea-based grease and organic lithium technology, which is applied in lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of grease hardening and oxidation stability degradation, complicated preparation operations, and restrictions on popularization and application. The effect of improving mechanical stability

Active Publication Date: 2020-12-15
长沙众城石油化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation operation of the above-mentioned lubricating grease is complicated, and the introduction of complex calcium or metal salt will cause the hardening of the lubricating grease and the decline of oxidation stability, which greatly limits the popularization and application of the product.

Method used

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  • Organic lithium soap composite urea-based lubricating grease and preparation method thereof
  • Organic lithium soap composite urea-based lubricating grease and preparation method thereof
  • Organic lithium soap composite urea-based lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 300g of mineral oil with a viscosity of 20sCt at 100°C and put it into the reaction kettle, add 13.1g of octadecylamine, 13g of oleylamine, 4.8g of cyclohexylamine, 26.1g of N-aminoethylpiperazine, stir and heat, and keep the temperature at 80 ℃. At the same time, add 300g of base oil and 48.8g of 4,4`-diphenylmethane diisocyanate into another reaction kettle, heat to dissolve, keep the temperature constant at 80°C, and mix the two solutions through a dynamic material mixer within 5 to 8 minutes. Reaction, after entering the intermediate tank, control the temperature at 95°C, and react for 60 minutes. Then add 22g of 12-hydroxystearic acid, 5.2g of azelaic acid, and 2.1g of boric acid successively, stir evenly, add 54g of 10% lithium hydroxide solution, stir and heat, raise the temperature to 160°C, keep the temperature for 1 hour, and then heat to Refining temperature (160-180°C), add 100g surplus quenching oil, when the temperature drops below 80°C, take out the...

Embodiment 2

[0046] Take 300g of mineral oil with a viscosity of 20sCt at 100°C and put it into a fat-making kettle, add 8.1g of octadecylamine, 6g of cyclohexylamine, and 19.1g of N-aminoethylpiperazine, stir and heat, and keep the temperature at 85°C. Add 260g of base oil and 38.2g of 4,4`-diphenylmethane diisocyanate into another reaction kettle, heat to dissolve, keep the temperature at 80°C, and react the two solutions through a dynamic material mixer within 2 to 4 minutes , after entering the intermediate kettle, control the temperature at 90°C, and react for 60 minutes. Then, add 26g of 12-hydroxystearic acid, 5.7g of azelaic acid, after stirring evenly, slowly add 49g of 10% lithium hydroxide solution and stir and heat, heat up to 160°C, keep the temperature for 1 hour, after that, heat to the refining temperature ( 160-180°C), add 100g of surplus quenching oil, when the temperature drops below 80°C, take out the kettle and grind three times with a three-roll machine. The product p...

Embodiment 3

[0048]Take 300g of PAO20 synthetic oil with a viscosity of 20sCt at 100°C and add it to the fat-making kettle, and add 13.6g of octadecylamine, 13.5g of oleylamine, 2.5g of cyclohexylamine, and 15.4g of N-aminoethylpiperazine, stir and heat, and the temperature Keep the temperature constant at 65°C, add 165g of base oil and 38.2g of 4,4`-diphenylmethane diisocyanate into another reactor at the same time, heat to dissolve, keep the temperature constant at 80°C, pass the two solutions within 2 to 4 minutes The reaction was carried out in a dynamic material mixer, and after entering the intermediate tank, the temperature was controlled at 87°C and the reaction was carried out for 60 minutes. Then, add 18g of 12-hydroxystearic acid, 3.2g of boric acid, slowly add 42g of 15% lithium hydroxide solution, stir and heat, raise the temperature to 160°C, keep the temperature for 1 hour, after that, heat to the refining temperature (160-180°C ), add 100g surplus quenching oil, when the te...

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Abstract

The invention relates to organic lithium soap composite urea-based lubricating grease with excellent extreme-pressure wear resistance and a preparation method thereof, in particular to novel organic acid lithium soap composite urea-based lubricating grease containing an amino-containing saturated dinitrogen-containing heterocyclic compound and a preparation method of the novel organic acid lithiumsoap composite urea-based lubricating grease. The product is prepared from the following specific raw materials, by weight: 65-90% of base oil, 5-20% of organic lithium soap, and 3-12wt% of a thickening agent. According to the novel organic lithium soap composite urea-based lubricating grease, by introducing the N-aminoethyl piperazine and the organic lithium compound, the extreme-pressure wear resistance and the mechanical stability of the grease are improved on the basis of keeping the original properties of the urea-based lubricating grease unchanged, so that the service life of the lubricating grease under a bearing condition is prolonged. And the lubricating requirements of bearings and equipment under the conditions of frequent shearing and heavy load can be met.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to a novel organic lithium soap complex urea-based lubricating grease and a preparation method thereof. Background technique [0002] Polyurea grease has a pure organic compound structure. Since its inception, it has been widely used in the electrical industry, metallurgical industry, food industry, automobile and aerospace industries due to its good thermal stability and oxidation stability. The extreme pressure anti-wear performance and poor mechanical stability of urea-based grease have always been the factors restricting its application range. [0003] At present, domestic polyurea-based lubricating grease is prepared from thickened mineral oil containing urea groups in the molecule. Since the polyurea thickener does not contain metal ions and polar groups, the adsorption force to the surface of the friction pair is poor. , resulting in poor bearing capac...

Claims

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Application Information

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IPC IPC(8): C10M123/04C10M169/02C10N50/10C10N30/06
CPCC10M123/04C10M169/02C10M2203/1006C10M2205/0285C10M2217/0456C10M2207/1285C10M2207/1276C10M2201/0876
Inventor 谭戈廖顺知
Owner 长沙众城石油化工有限责任公司
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