A lithium-based lubricating grease composition with excellent wear resistance and a preparing method thereof

A technology of grease composition and lithium-based grease, which is applied in the field of grease, can solve the problems of poor water resistance, poor anti-wear performance, poor oxidation resistance, etc., achieve good high temperature resistance, improve wear reduction ability and The effect of antioxidant capacity

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-based grease has the advantages of good colloidal stability, mechanical stability, long service life, and wide range. It is an ideal multi-purpose, long-life grease, but lithium-based grease also has some defects: such as anti-oxidation Poor performance, poor anti-wear performance, poor water resistance

Method used

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  • A lithium-based lubricating grease composition with excellent wear resistance and a preparing method thereof
  • A lithium-based lubricating grease composition with excellent wear resistance and a preparing method thereof
  • A lithium-based lubricating grease composition with excellent wear resistance and a preparing method thereof

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Experimental program
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Effect test

preparation example Construction

[0046] Among the present invention, the preparation method of the compound of structure shown in formula (I) preferably comprises:

[0047] (a) react aniline, sulfur chloride and 4-chloroaniline to generate intermediate M shown in formula (II),

[0048]

[0049] (b) carrying out nucleophilic substitution reaction between the intermediate M obtained in step (a) and dimercapto-1,3,4-thiadiazole under alkaline conditions to generate the multi-effect additive shown in formula (I),

[0050]

[0051] In step (a) of the present invention, the specific mode of reacting aniline, sulfur chloride and 4-chloroaniline preferably includes:

[0052] (i) fully reacting aniline and sulfur chloride at -20-0°C in the first solvent under an inert atmosphere;

[0053] (ii) Add 4-chloroaniline into the reaction system of step (i), and react at 15-30° C. for 1-3 h.

[0054] In the present invention, the inert atmosphere can be a conventional inert atmosphere in the field, for example, it can...

Embodiment

[0092] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0093] In the following examples and comparative examples:

[0094] The method for monitoring the complete reaction: thin-layer chromatography (TLC) fluorescence color method.

[0095] Total yield = molar amount of final product / molar amount of aniline × 100%

[0096] The physical and chemical analysis method of the product: the element content was determined by inductively coupled plasma ion emission spectrometry.

[0097] Structural characterization method: NMR method ( 1 H spectrum, 13 C carbon spectrum), high-resolution mass spectrometry.

preparation example

[0099] Fill a 500ml flask with an electromagnetic stirrer (stirring speed is 300rpm) with nitrogen protection, add 150ml of dichloromethane, then add 0.2mol of sulfur chloride, fully cool in an ice-water bath, add 0.2mol of aniline . Remove the ice-water bath after monitoring until the reaction is complete, and place it at room temperature of 25°C. After the reaction system gradually rises to 25°C, add 4-chloroaniline in 3 times for reaction. The amount added each time is the same, and 4-chloroaniline is added in total 0.15mol. After the reaction was continued for 2 hours, 30ml of saturated brine was added to quench the reaction, and then the reaction system was transferred to a separatory funnel, washed with 50ml of distilled water and 50ml of saturated brine, and dried by adding 10g of anhydrous lithium sulfate at 25°C for 20min. The filtered filtrate was evaporated to remove the solvent at 40° C. and 0.05 MPa to obtain intermediate M1.

[0100] Fill a 500ml flask with an ...

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Abstract

A lithium-based lubricating grease composition with excellent wear resistance is disclosed. Based on the weight of the composition, the composition comprises 65-95% by weight of lubricating base oil, 5-35% by weight of a lithium-based thickening agent and 0.1-15% by weight of an additive. The additive comprises a compound having a structure shown as a formula (I). A preparing method of the composition is also disclosed. The composition comprises the multiple-effect additive, and therefore oxidation resistance and wear resistance of the lubricating grease composition are largely improved, other properties of the lithium-based lubricating grease composition are not influenced, and the composition still has extremely good high-temperature resistance, colloid stability, carrying capacity and waterproofness, so that the composition can be qualified for severe work conditions, such as high temperature, high speeds, high loads and high water contents.

Description

technical field [0001] The invention relates to the field of lubricating grease, in particular to a lithium-based lubricating grease composition containing a specific additive with excellent wear-reducing performance and a preparation method thereof. Background technique [0002] Lithium-based lubricating grease is a kind of multi-effect lubricating grease with the fastest development since the 1940s, the largest production volume and the widest application field. The American Grease Association regards the proportion of a country's lithium-based grease as a measure of its technical level in the grease industry. Lithium-based grease has the advantages of good colloidal stability, mechanical stability, long service life, and wide range. It is an ideal multi-purpose, long-life grease, but lithium-based grease also has some defects: such as anti-oxidation Poor performance, poor anti-wear performance, poor water resistance. [0003] The traditional production method of lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M135/36C10M169/04C10M169/06C10N50/10C10N30/06C10N30/10
Inventor 陈政孙洪伟郑会段庆华张建荣刘中其姜靓何懿峰
Owner CHINA PETROLEUM & CHEM CORP
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