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A kind of vacuum sealing grease and preparation method thereof

A vacuum sealing and grease technology, applied in the field of silicone grease, can solve problems such as poor stability, poor sealing performance, and gas leakage

Active Publication Date: 2022-04-08
杭州得润宝油脂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials of the lubricant do not use volatile auxiliary dispersants, which can reduce carbon emissions and environmental pollution during the preparation process, but it has poor stability and grease The reason for the problem of easy loss is: due to the relatively large specific surface area of ​​fumed silica and strong adsorption, the by-product HCI in the production process is easily adsorbed on the surface of fumed silica, and HCl becomes hydrochloric acid after contacting with water , while silicone oil or synthetic ester is often used as base oil in grease formulations, the former will break the Si-O-Si bond under the action of hydrochloric acid, and the latter will undergo hydrolysis of the ester group under the action of hydrochloric acid, and the deterioration of the base oil will cause grease Loss, GIS sealing performance deteriorates, resulting in SF 6 Risk of Gas Leakage

Method used

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  • A kind of vacuum sealing grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare a kind of vacuum sealing grease through the following steps, and conduct a performance test:

[0046] (1) 784.8g methyl silicone oil (chemical formula is (CH 3 ) 3 SiO[(CH 3 ) 2 SiO] n Si(CH 3 ) 3 , where n=600~700; the viscosity at 25°C is 5000mm 2 / s), 42.4g of crystalline diphenyldihydroxysilane and absolute ethanol were added to the reaction kettle, heated to 40°C, and kept at a constant temperature for 30min;

[0047] (2) After the constant temperature is over, heat to 90°C, add an aqueous emulsion containing 67.8g of magnesium carbonate to the reactor, and keep the temperature constant for 120min; during the process of adding magnesium carbonate and constant temperature, vacuum inhale 105g of fumed silica;

[0048] (3) After the constant temperature is completed, heat to 130°C and keep the temperature constant for 30 minutes;

[0049] Above steps (1)~(3) all carry out under stirring;

[0050] (4) After the constant temperature is finished, grind i...

Embodiment 2

[0058] Prepare a kind of vacuum sealing grease through the following steps, and conduct a performance test:

[0059] (1) 796g methyl silicone oil (chemical formula is (CH 3 ) 3 SiO[(CH 3 ) 2 SiO] n Si(CH 3 ) 3 , where n=800~900; the viscosity at 25°C is 10000mm 2 / s), 38g of crystalline diphenyldihydroxysilane and absolute ethanol were added to the reaction kettle, heated to 80°C, and kept at a constant temperature for 30min;

[0060] (2) After the constant temperature is over, heat to 85°C, add an aqueous emulsion containing 60.8g basic magnesium carbonate to the reaction kettle, and keep the temperature constant for 120min; during the process of adding basic magnesium carbonate and constant temperature, vacuum inhale 100g fumed silica ;

[0061] (3) After the constant temperature is completed, heat to 150°C and keep the temperature constant for 30 minutes;

[0062] Above steps (1)~(3) all carry out under stirring;

[0063] (4) After the constant temperature is fini...

Embodiment 3

[0071] Prepare a kind of vacuum sealing grease through the following steps, and conduct a performance test:

[0072] (1) 806.2g methyl silicone oil (chemical formula is (CH 3 ) 3 SiO[(CH 3 ) 2 SiO] n Si(CH 3 ) 3 , where n=1200~1300; the viscosity at 25°C is 30000mm 2 / s), 40g of crystalline diphenyldihydroxysilane and absolute ethanol were added to the reaction kettle, heated to 60°C, and kept at a constant temperature for 30min;

[0073] (2) After the constant temperature is over, heat to 95°C, add an aqueous emulsion containing 64g of barium carbonate to the reactor, and keep the temperature constant for 120min; during the process of adding barium carbonate and constant temperature, vacuum inhale 95g of fumed silica;

[0074] (3) After the constant temperature is completed, heat to 140°C and keep the temperature constant for 30 minutes;

[0075] Above steps (1)~(3) all carry out under stirring;

[0076] (4) After the constant temperature is finished, grind in a three...

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Abstract

The invention relates to the technical field of silicone grease, and discloses a vacuum sealing grease and a preparation method thereof. The vacuum sealing grease comprises the following raw materials in parts by weight: 60-80 parts of base oil, 4-20 parts of thickener, 0.1-10 parts of acid neutralizer; the thickener is fumed silica; the acid The neutralizer is a substance that is insoluble or slightly soluble in water and can neutralize acids. The lubricating grease of the present invention has strong water resistance, and can still maintain good stability in a high-humidity environment or when it is in contact with rainwater outdoors, so as to maintain its sealing performance.

Description

technical field [0001] The invention relates to the technical field of silicone grease, in particular to a vacuum sealing grease and a preparation method thereof. Background technique [0002] Gas-insulated metal-enclosed switchgear (GIS) is the use of SF with excellent insulation properties 6 (Sulfur hexafluoride) gas is used as the insulating and arc-extinguishing medium, and the circuit breaker, isolating switch, grounding switch, lightning arrester, busbar, bushing, cable head, etc. are combined in a building block structure, and all are enclosed in a metal casing. substation. Due to its incomparable advantages of many traditional open substations, such as less land occupation, high reliability, no pollution, convenient maintenance, and long service life, GIS is favored by domestic and foreign power users and has become the center of switchgear in the domestic and foreign power transmission and distribution industry. Cutting-edge and most competitive equipment. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M177/00C10N30/06C10N40/34C10N50/10
CPCC10M169/04C10M177/00C10M2201/105C10M2229/0415C10M2201/062C10M2227/04
Inventor 杨国庆程型国周圆
Owner 杭州得润宝油脂股份有限公司
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