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Isocyanate derivative, preparation method and application thereof, and lubricating grease composition

A technology of isocyanate and diisocyanate, applied in the field of isocyanate derivatives, can solve problems such as improving the performance of lubricating grease compositions

Pending Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the reports in the prior art mainly focus on the preparation and synthesis of polyurea and polyurea grease. Most of the performance of the grease composition is improved by improving the base oil, additives, etc., but not from the structure of the thickener itself. Improves the performance of grease compositions

Method used

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  • Isocyanate derivative, preparation method and application thereof, and lubricating grease composition
  • Isocyanate derivative, preparation method and application thereof, and lubricating grease composition
  • Isocyanate derivative, preparation method and application thereof, and lubricating grease composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] First mix 30g of 500N base oil and 6.62g of MDI and heat to 50°C, slowly add 0.80g of ethylenediamine, raise the temperature to 80°C, react for 0.5h, add 7.58g of n-octadecyl mercaptan, 0.1g of triethylenediamine to 30g After dissolving in 500N base oil, slowly add it dropwise to the above mixture under sufficient stirring conditions, keep the temperature at 80°C and stir for 1 hour, continue to raise the temperature to 185°C, keep it warm for 15 minutes, cool, and grind to obtain a grease composition. Its main reaction equation is as follows:

[0052]

[0053]

[0054]

Embodiment 2

[0056] First mix 30g of 500N base oil and 5.32g of TDI and heat to 50°C, slowly add 0.92g of ethylenediamine, raise the temperature to 80°C, react for 0.5h, add 8.76g of n-octadecanethiol, 0.1g of triethylenediamine to 30g After dissolving in 500N base oil, slowly add it dropwise to the above mixture under sufficient stirring conditions, keep the temperature at 80°C and stir for 1 hour, continue to raise the temperature to 185°C, keep it warm for 15 minutes, cool, and grind to obtain a grease composition.

Embodiment 3

[0058] First mix 20g of 500N base oil and 5.20g of MDI and heat to 50°C, add 5.95g of n-octadecanethiol and 0.1g of triethylenediamine into 20g of 500N base oil to dissolve, then slowly add to the above mixture and heat up to 80°C , reacted for 1 hour, quickly added 1.25g of ethylenediamine, kept the temperature at 80°C, reacted for 0.5h, mixed 20g of 500N base oil and 2.6g of MDI and heated to dissolve, and slowly added dropwise to the above mixture under sufficient stirring conditions, keeping the temperature at 80 °C, fully stirred and reacted for 1 hour, continued to heat up to 185 °C, kept the temperature for 15 minutes, cooled, and ground to obtain a grease composition.

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Abstract

The invention provides an isocyanate derivative, a preparation method and application thereof, and a lubricating grease composition containing the isocyanate derivative. The structure of the isocyanate derivative disclosed by the invention is shown as a formula (I), wherein the definition of each group is shown in the specification. The isocyanate derivative has excellent extreme pressure anti-wear performance and can be used as a thickening agent of a lubricating grease composition or an additive of lubricating grease, the lubricating grease composition prepared by taking the isocyanate derivative as the thickening agent has excellent extreme pressure anti-wear performance, and the service life of lubricating grease can be prolonged.

Description

technical field [0001] The present invention relates to an isocyanate derivative, in particular to an isocyanate derivative suitable for use as a grease thickener. Background technique [0002] Polyurea is a derivative of isocyanate, which is a class of compounds produced by the reaction of isocyanate components and amino compounds. Greases are prepared by thickening base oils with organic compounds containing urea groups in their molecules. Since the polyurea thickener is different from the metal soap-based thickener, it does not contain metal ions, which avoids the catalytic oxidation of the metal ions in the soap-based thickener to the grease base oil. Therefore, the polyurea grease has good oxidation resistance. Stability and thermal stability, especially suitable for high temperature, high load, wear-resistant lubrication occasions. [0003] Traditional polyurea grease thickeners only contain nitrogen, which is not outstanding in terms of extreme pressure and anti-wea...

Claims

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Application Information

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IPC IPC(8): C07C333/08C10M135/18C10M115/10C10M169/00C10M169/02C10M169/04C10M169/06C10N50/10C10N30/06C10N30/12
CPCC07C333/08C07C273/1827C10M135/18C10M115/10C10M169/00C10M169/02C10M169/04C10M169/06C10M2219/06C10M2203/1006C07C275/40
Inventor 李朝宇何懿峰刘伟陈靖郑会刘显秋
Owner CHINA PETROLEUM & CHEM CORP
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