A kind of lubricating grease composition and preparation method thereof

A technology of grease composition and cross-linking method, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as poor viscosity-temperature performance, achieve excellent viscosity-temperature performance, improve wear resistance, and not easily change color

Active Publication Date: 2019-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of grease composition with excellent viscosity-temperature performance, a kind of preparation method of grease composition and by this method in order to overcome the relatively poor defect of viscosity-temperature performance of existing grease composition. Prepared grease composition

Method used

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  • A kind of lubricating grease composition and preparation method thereof
  • A kind of lubricating grease composition and preparation method thereof
  • A kind of lubricating grease composition and preparation method thereof

Examples

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preparation example Construction

[0028] The preparation method of the lubricating grease composition provided by the present invention comprises mixing and dispersing base oil and nitrile rubber particles to be dispersed with a crosslinked structure prepared by a radiation crosslinking method, and relative to 100 parts by weight of the base oil, the amount of the nitrile rubber particles to be dispersed is 10-180 parts by weight.

[0029] According to the preparation method of the grease composition provided by the present invention, as mentioned above, relative to 100 parts by weight of the base oil, the amount of the nitrile rubber particles to be dispersed is 10-180 parts by weight, but in order to make the base oil Play a better synergistic effect with the nitrile rubber particles to be dispersed, and then make the resulting grease composition have better viscosity-temperature properties, preferably, relative to the base oil of 100 parts by weight, the to-be The amount of dispersed nitrile rubber particle...

Embodiment approach

[0039] The present invention is not particularly limited to the manner of mixing and redispersing, as long as the nitrile rubber particles to be dispersed can be effectively dispersed in the base oil, thereby obtaining a mixture with the base oil as the continuous phase and the nitrile rubber particles as the dispersed phase. phase grease composition. According to a preferred embodiment of the present invention, the mixing and dispersing mode includes:

[0040] (1) adding the nitrile rubber particles to be dispersed in the base oil and mixing by mechanical stirring, so that the nitrile rubber particles to be dispersed are dispersed or suspended in the base oil to obtain a preliminary dispersed composition;

[0041] (2) redispersing the composition of the preliminary dispersion until the average particle diameter of the dispersed nitrile rubber particles reaches in the range of 20-2000nm, preferably in the range of 50-1000nm, more preferably in the range of 70-500nm In the ran...

Embodiment 1

[0058] This example is used to illustrate the grease composition provided by the present invention and its preparation method.

[0059] 100 parts by weight of mineral base oil Ib150 and 10 parts by weight of nitrile rubber particles to be dispersed VP401 are mixed and mechanically stirred evenly, then homogenized and circulated five times in a three-roll mill, and the roller speed is 280 rpm during homogenization, and the dispersion When the gap between the rolls is as small as 10μm, a mixed material is obtained. The above mixed material was kept in a high-temperature oven at 150°C for 4 hours, and then passed through a three-roll mill for homogenization and circulation five times. The roll speed during homogenization was 280 rpm, and the gap between the rolls was as small as 5 μm during dispersion to obtain a grease combination. See Table 1 and Table 2 for their dynamic viscosity, oil separation and lubricating properties.

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Abstract

The invention relates to the field of grease and provides a grease composition and a preparation method thereof. The grease composition comprises base oil and nitrile rubber particles which have crosslinked structures, are prepared through an irradiation crosslinking method and are dispersed in the base oil. The base oil is a continuous phase. The nitrile rubber particles are dispersed phases. The grease composition comprises, by weight, 100 parts of the base oil and 10-180 parts of the nitrile rubber particles. The viscosity of the grease composition can be effectively adjusted along with temperature change. The grease composition has a wide temperature application range. Compared with the grease composition containing the nitrile rubber particles obtained through crosslinking with a peroxide, the grease composition provided by the invention has low kinematic viscosity at a temperature of 40 DEG C and high kinematic viscosity at a temperature of 100 DEG C. The grease composition has excellent antiwear and antifriction performances.

Description

technical field [0001] The invention relates to a lubricating grease composition, a preparation method of the lubricating grease composition and a lubricating grease composition prepared by the method. Background technique [0002] Grease is generally a semi-solid and solid lubricant obtained by dispersing a thickener in one or several lubricating base oils and undergoing a saponification reaction. Common grease thickeners are divided into soap-based, non-soap-based and hydrocarbon-based types. Soap-based thickeners are mostly fatty acid salts, such as calcium stearate and 12-hydroxystearic acid calcium salt. Thickeners include organic polyurea, inorganic compounds, etc., and hydrocarbon-based thickeners are generally paraffins. Grease prepared with the above thickeners can generally meet the needs of ordinary use, but with the rapid development of modern industry, the emerging high-end mechanical equipment has higher and higher requirements for grease performance, and need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M159/12C10M169/04C10N30/06C10N30/04C10N30/08
Inventor 张晓红蔡传伦赖金梅乔金樑宋志海戚桂村李秉海王湘高建明张红彬蒋海斌何谷茹越
Owner CHINA PETROLEUM & CHEM CORP
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