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Modified silicone grease composition and preparation method thereof

A technology of grease composition and modified silicon, which is applied in lubricating compositions, petroleum industry, base materials, etc., can solve the problems of poor solubility and sensitivity of traditional additives, poor boundary lubrication performance, etc., and achieve excellent low volatility performance, Good weather resistance and the effect of improving lubricating performance

Inactive Publication Date: 2014-08-06
SHENZHEN EUBO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantages as a lubricating oil are poor boundary lubrication performance, poor solubility and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 87.5% by weight of phenyl silicone oil having a viscosity of 75 cst and a structure of Me3Si[OSi(C6H5)2]n[OSiMe2]mOSiMe3 was used as the base oil.

[0026] Heat the base oil and keep stirring at a speed of 60rpm, and dissolve 11% lauryl hydroxystearic acid in the base oil. Slowly add LiOH oil phase dispersion (the molar ratio of it to lauryl hydroxystearic acid is 1.01:1), and heat to 99°C for full saponification. Continue to raise the temperature to 215°C until the lithium lauryl hydroxystearate melts, and after it is fully melted, cool down and recrystallize to obtain the grease base compound.

[0027] Add corresponding additives, add 1.5% of anti-wear agent and antioxidant and other additives. Homogeneously dispersed to obtain a grease composition.

[0028] The prepared grease was tested for physical and chemical properties, and the test results were as follows:

[0029] Test items Example 1 Four-ball friction and wear (40kg, wear scar, mm) 0.44 ...

Embodiment 2

[0031] 84.5% by weight of phenyl silicone oil with a viscosity of 75cst, whose structure is Me3Si[OSi(C6H5)2]n[OSiMe2]mOSiMe3, is used as the base oil.

[0032] Heat the base oil and keep stirring at 60rpm, add long-chain alkyl silicone oil 3% colloid modifier. Dissolve 11% lauryl hydroxystearic acid in base oil, slowly add LiOH oil phase dispersion (the molar ratio of it to lauryl hydroxystearic acid is 1.01:1), heat to 99°C for full saponification. Continue to raise the temperature to 215°C until the lithium lauryl hydroxystearate melts, and after it is fully melted, cool down and recrystallize to obtain the grease base compound.

[0033] Add corresponding additives, add 1.5% of anti-wear agent and antioxidant and other additives. Homogeneously dispersed to obtain a grease composition.

[0034] The prepared grease was tested for physical and chemical properties, and the test results were as follows:

[0035] Test items Example 1 Four-ball friction and wear...

Embodiment 3

[0038] 76.5% by weight of phenyl silicone oil with a viscosity of 100cst, whose structure is Me3Si[OSi(C6H5)2]n[OSiMe2]mOSiMe3, is used as the base oil.

[0039] Heat the base oil and keep stirring at 60rpm, add long-chain alkyl silicone oil 3% colloid modifier. Add 12% by weight of pre-prepared dipolyurea powder to the base oil, add 10% ethyl acetate, stir for 30 minutes, heat to 60°C and distill under reduced pressure to remove ethyl acetate. Continue heating to 220° C., stir for 15 minutes, and then slowly cool to room temperature to obtain a grease base compound.

[0040] Add corresponding additives, add 1.5% of anti-wear agent and antioxidant and other additives. Grind or homogeneously disperse to obtain a grease composition.

[0041] The prepared grease was tested for physical and chemical properties, and the test results were as follows:

[0042] Test items Example 1 Four-ball friction and wear (40kg, wear scar, mm) 0.50 Water resistance (%, 75℃...

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PUM

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Abstract

The invention relates to the field of lubrication materials and especially relates to a modified silicone grease composition and a preparation method thereof. The modified silicone grease composition comprises, by weight, 30-94.8% of base oil having a kinematic viscosity scope of 5cst-100000cst, 5-30% of a thickening agent, 0.1-5% of a surface conditioning agent and 0.1-15% of a colloid stabilizing agent. The modified silicone grease composition prepared from modified silicone as the base oil has lubrication characteristics in a wide temperature range, low vapor pressure and good boundary lubrication effects. The modified silicone grease composition has good holding capacity on a friction surface and good sealing performances, can prevent water, dust and other mechanical impurities from entering into the friction surface and has good weatherability. The modified silicone grease composition is suitable for a high-temperature bearing, a high-temperature chain, a low-temperature bearing and a gear and for lubrication of mechanical parts working in vacuum and radiation environments.

Description

technical field [0001] The invention relates to the field of lubricating materials, in particular to a modified silicone oil-based lubricating grease composition and a preparation method thereof. Background technique [0002] Simethicone is a widely used synthetic oil that has been widely used as a lubricating oil in mechanical and electronic equipment, as well as in the automotive and computer industries. However, its disadvantages as a lubricating oil are poor boundary lubrication performance, poor solubility and sensitivity to traditional additives, especially the sliding friction surface of steel-to-steel friction pairs. Contents of the invention [0003] The main technical problem to be solved by the present invention is to provide a novel modified silicon oil grease composition with good boundary lubricity. [0004] A kind of modified silicone oil grease composition provided by the invention, it comprises following components: [0005] A. The base oil of 30-94.8%...

Claims

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Application Information

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IPC IPC(8): C10M107/50C10M169/02C10M169/04C10N50/10
Inventor 李士成岳风阳杨发达童蓉岳风树
Owner SHENZHEN EUBO NEW MATERIAL TECH
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