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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, reduce interfacial friction, and increase rolling friction 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

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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 silicone oil base oil and silicone rubber particles to be dispersed with a crosslinked structure prepared by a radiation crosslinking method, and relative to 100 parts by weight of the silicone oil Base oil, the amount of the silicone rubber particles to be dispersed is 10-180 parts by weight.

[0029] 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 silicone oil base oil, the amount of the silicone rubber particles to be dispersed is 10-180 parts by weight, but in order to make the silicone oil base The oil and the silicone rubber particles to be dispersed play a better synergistic effect, and then make the resulting grease composition have better viscosity-temperature properties, preferably, relative to 100 parts by weight of t...

Embodiment approach

[0039] The present invention has no particular limitation on the mixing and redispersing methods, as long as the silicone rubber particles to be dispersed can be effectively dispersed in the silicone oil base oil, so as to obtain a mixture with the silicone oil base oil as the continuous phase and the silicone 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 silicone rubber particles to be dispersed into the silicone oil base oil and mixing by mechanical stirring, so that the silicone rubber particles to be dispersed are dispersed or suspended in the silicone oil base oil to obtain a preliminary dispersed composition;

[0041] (2) redispersing the initially dispersed composition until the average particle diameter of the dispersed silicone rubber particles reaches within the range of 20-2000nm, preferably within the range of 50-1000nm...

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 methyl silicone oil A and 10 parts by weight of silicone rubber particles to be dispersed VP601 were mixed and mechanically stirred evenly, and then homogenized in a three-roller mill for five times. The roller speed was 280 rpm during homogenization. The gap between the rolls is as small as 10 μm, and the 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 lubricating grease composition and a preparation method thereof. The lubricating grease composition contains silicone oil base oil and silicone rubber particles which are dispersed in the silicone oil base oil and prepared with an irradiation crosslinking method and have a cross-linked structure, wherein the silicone oil base oil adopts a continuous phase, the silicone rubber particles adopt a dispersion phase, and for 100 parts of the silicone oil base oil by weight, the lubricating grease composition contains 10-180 parts of the silicone rubber particles by weight. The provided lubricating grease composition can effectively regulate viscosity along with change of the temperature and has wide application temperature range, and compared with lubricating grease composition containing silicone rubber particles obtained through peroxide crosslinking, the lubricating grease composition has lower kinematic viscosity at the temperature of 40 DEG C and higher kinematic viscosity at the temperature of 100 DEG C. Besides, the lubricating grease composition has excellent anti-wear and friction-reducing properties.

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): C10M169/04C10M159/12C10N30/06
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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