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Calcium-based lubricating grease composition with excellent antifriction property and preparation method therefor

A lubricating grease composition and technology of calcium-based lubricating grease, applied in the field of lubricating grease, can solve the problems of limited hardening improvement, long production time, hardening of composite calcium-based lubricating grease, etc. The effect of good high temperature resistance

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

However, due to the hardening problem of complex calcium-based grease during storage and use, its promotion and application are greatly limited.
[0004] In recent years, in order to improve the performance of complex calcium-based grease, there are improvements in formula and manufacturing process, such as CN1888036 and CN101935573A; some have adjusted the selection and proportion of small molecule acids and long-chain organic acids, and selected Some small molecular acids (boric acid) and other auxiliary substances (titanium dioxide) improve the hardening problem of complex calcium-based grease, but the production time is too long and the degree of hardening improvement is limited; there are also polyurea greases to improve its performance , such as CN1493673, US5084193 and US4902435, the complex calcium-based grease is mixed with polyurea-based grease, but the production materials and process are relatively complicated

Method used

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  • Calcium-based lubricating grease composition with excellent antifriction property and preparation method therefor
  • Calcium-based lubricating grease composition with excellent antifriction property and preparation method therefor
  • Calcium-based lubricating grease composition with excellent antifriction property and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] Among the present invention, the preparation method of the compound of structure shown in formula (I) preferably comprises:

[0048] (a) react aniline, sulfur chloride and 4-chloroaniline to generate intermediate M shown in formula (II),

[0049]

[0050] (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),

[0051]

[0052] In step (a) of the present invention, the specific mode of reacting aniline, sulfur chloride and 4-chloroaniline preferably includes:

[0053] (i) fully reacting aniline and sulfur chloride at -20-0°C in the first solvent under an inert atmosphere;

[0054] (ii) Add 4-chloroaniline into the reaction system of step (i), and react at 15-30° C. for 1-3 h.

[0055] In the present invention, the inert atmosphere can be a conventional inert atmosphere in the field, for example, it can...

Embodiment

[0093] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0094] In the following examples and comparative examples:

[0095] The method for monitoring the complete reaction: thin-layer chromatography (TLC) fluorescence color method.

[0096] Total yield = molar amount of final product / molar amount of aniline × 100%

[0097] The physical and chemical analysis method of the product: the element content was determined by inductively coupled plasma ion emission spectrometry.

[0098] Structural characterization method: NMR method ( 1 H spectrum, 13 C carbon spectrum), high-resolution mass spectrometry.

preparation example

[0100] 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 continuing the reaction 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 calcium 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.

[0101] Fill a 500ml flask with an ele...

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Abstract

The invention discloses a calcium-based lubricating grease composition with excellent antifriction property. The lubricating grease composition contains the following ingredients in percentage by weight: 65-95wt% of lubricating base oil, 5-35wt% of calcium-based thickener and 0.1-15wt% of additive, wherein the additive contains a compound with a structure represented by a formula (I) shown in the description. The invention further provides a preparation method for the calcium-based lubricating grease composition with excellent antifriction property. The calcium-based lubricating grease composition disclosed by the invention contains the multipurpose additive, so that the antifriction capability and oxidation resistance of lubricating grease are greatly improved, and meanwhile, the influence on other properties of the calcium-based lubricating grease is low; and the high-temperature resistance, colloid stability and bearing capacity are still excellent, so that the lubricating grease composition can be adequate to harsh working conditions, such as high-temperature, high-speed, high-load and watery.

Description

technical field [0001] The invention relates to the field of lubricating grease, in particular to a calcium-based lubricating grease composition containing a specific additive with excellent wear-reducing performance and a preparation method thereof. Background technique [0002] my country began to produce calcium-based lubricating grease in the 1940s. Because of its simple production process and equipment, easy access to raw materials, and low product cost, it is very popular among producers and users. Calcium-based grease has good water resistance, is not easy to emulsify, has good adhesion to metal surfaces, and has good colloidal stability. It does not separate oil during storage, but because it contains a certain amount of structural water, when used When the temperature exceeds 100°C, the water is easy to evaporate and lose, causing the structure of the calcium-based grease to be destroyed and the lubricating effect to be lost. Therefore, the calcium-based grease is g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M169/00C10M177/00C10N30/06C10N50/10
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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