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A kind of lubricating grease composition and preparation method thereof

A technology of grease composition and cross-linking method, which is applied in lubricating compositions, petroleum industry, etc., can solve problems such as poor viscosity-temperature performance, achieve excellent viscosity-temperature performance, reduce interfacial friction, and excellent aging resistance Effect

Active Publication Date: 2019-03-26
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

Examples

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Effect test

preparation example Construction

[0026] The preparation method of the lubricating grease composition provided by the present invention comprises mixing and dispersing base oil and ethylene-vinyl acetate rubber particles to be dispersed with a crosslinked structure prepared by a radiation crosslinking method, and relative to 100 parts by weight of The amount of the base oil and the ethylene-vinyl acetate rubber particles to be dispersed is 10-180 parts by weight.

[0027] According to the preparation method of the lubricating grease composition provided by the present invention, as mentioned above, relative to 100 parts by weight of the base oil, the amount of the ethylene-vinyl acetate rubber particles to be dispersed is 10-180 parts by weight, but for Make the base oil and the ethylene-vinyl acetate rubber particles to be dispersed play a better synergistic effect, and then make the obtained grease composition have better viscosity-temperature performance, preferably, relative to 100 parts by weight of the B...

Embodiment approach

[0037] The method of mixing and redispersing in the present invention is not particularly limited, as long as the ethylene-vinyl acetate rubber particles to be dispersed can be effectively dispersed in the base oil, so as to obtain a mixture with the base oil as the continuous phase and ethylene-vinyl acetate as the continuous phase. A grease composition in which vinyl ester rubber particles serve as a dispersed phase is sufficient. According to a preferred embodiment of the present invention, the mixing and dispersing mode includes:

[0038] (1) adding the ethylene-vinyl acetate rubber particles to be dispersed into the base oil and mixing by mechanical stirring, so that the ethylene-vinyl acetate rubber particles to be dispersed are dispersed or suspended in the base oil, to obtain initially dispersed composition;

[0039] (2) Redisperse the initially dispersed composition until the average particle diameter of the dispersed ethylene-vinyl acetate rubber particles reaches w...

Embodiment 1

[0056] This example is used to illustrate the grease composition provided by the present invention and its preparation method.

[0057] 100 parts by weight of mineral base oil Ib150 and 10 parts by weight of ethylene-vinyl acetate rubber particles VP801 to be dispersed are mixed and mechanically stirred evenly, then homogenized and circulated five times in a three-roller mill, and the roller speed during homogenization is 280 rpm Minutes, the gap between the rollers is as small as 10 μm during dispersion, and 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 lubricating grease, and particularly provides a lubricating grease composition and a preparation method thereof. The lubricating grease composition contains base oil and ethylene-vinyl acetate rubber particles, the ethylene-vinyl acetate rubber particles are dispersed in the base oil and prepared through an irradiation crosslinking method and have a cross-linked structure, the base oil serves as a continuous phase, the ethylene-vinyl acetate rubber particles serve as a dispersion phase, and relative to 100 parts by weight of base oil, the content of the ethylene-vinyl acetate rubber particles ranges from 10 parts by weight to 180 parts by weight. The viscosity of the lubricating grease composition can be effectively adjusted along with temperature changes, the temperature application range is wide, and compared with a lubricating grease composition containing ethylene-vinyl acetate rubber particles obtained through peroxide crosslinking, the kinematic viscosity of the lubricating grease composition is low at the temperature of 40 DEG C, and the kinematic viscosity of the lubricating grease composition is high at the temperature of 100 DEG C. In addition, the lubricating grease composition has excellent antiwear and antifriction performance.

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): C10M169/04C10M177/00C10N30/02C10N30/10C10N30/06
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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