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High-temperature-resistant polytetrafluoroethylene lubricating grease for sealing and preparation method thereof

A technology for polytetrafluoroethylene grease and sealing, applied in lubricating compositions, petroleum industry, additives, etc., can solve problems such as poor high temperature resistance, achieve excellent extreme pressure and anti-wear performance, excellent lubricating performance, good The effect of tightness

Inactive Publication Date: 2019-01-04
SHANGHAI INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a high temperature resistant lubricating and sealing grease and its preparation method. Technical problems of poor high temperature resistance

Method used

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  • High-temperature-resistant polytetrafluoroethylene lubricating grease for sealing and preparation method thereof
  • High-temperature-resistant polytetrafluoroethylene lubricating grease for sealing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The following components are used to prepare the polytetrafluoroethylene grease for high temperature resistant sealing, based on the total mass of the grease, high viscosity methyl silicone oil: 15%, low viscosity methyl silicone oil: 25%, phenyl silicone oil: 15% , PTFE thickener: 30%, diphenylsilanediol: 3%, polymethyl methacrylate: 5%, boron nitride: 7%;

[0043] The preparation method of a kind of high-temperature-resistant sealing polytetrafluoroethylene grease product described in this example is as follows:

[0044] (1) Add base oil to the reactor and heat up to 120°C, and carry out stirring and heating reaction under this temperature condition;

[0045] (2) Add a structural stabilizer to the reactor and raise the temperature of the reactor to 150°C, and carry out a constant temperature stirring reaction for 20-30min;

[0046] (3) Add polytetrafluoroethylene powder to the reactor and carry out constant temperature refining and stirring reaction at 150°C for 1 ho...

Embodiment 2

[0052] The following components are used to prepare the polytetrafluoroethylene grease for high temperature resistant sealing, based on the total mass of the grease, high viscosity methyl silicone oil: 15%, low viscosity methyl silicone oil: 20%, phenyl silicone oil: 15% , PTFE thickener: 35%, diphenylsilanediol: 4%, polymethyl methacrylate: 6%, boron nitride: 4%, silicon dioxide: 1%;

[0053] The preparation method of a kind of high temperature resistant sealing polytetrafluoroethylene grease product described in this example is as follows:

[0054] (1) Add base oil to the reactor and heat up to 120°C, and carry out stirring and heating reaction under this temperature condition;

[0055] (2) Add a structural stabilizer to the reactor and raise the temperature of the reactor to 150°C, and carry out a constant temperature stirring reaction for 20-30min;

[0056] (3) Add polytetrafluoroethylene powder to the reaction kettle and carry out constant temperature refining and stirring...

Embodiment 3

[0062] The following components are used to prepare the polytetrafluoroethylene grease for high temperature resistant sealing, based on the total mass of the grease, high viscosity methyl silicone oil: 10%, low viscosity methyl silicone oil: 15%, phenyl silicone oil: 25% , PTFE thickener: 35%, structure stabilizer: 5%, polymethyl methacrylate: 5%, boron nitride: 3.5%, silicon dioxide 1.5%;

[0063] The preparation method of a kind of high-temperature-resistant sealing polytetrafluoroethylene grease product described in this example is as follows:

[0064] (1) Add base oil to the reactor and heat up to 120°C, and carry out stirring and heating reaction under this temperature condition;

[0065] (2) Add a structural stabilizer to the reactor and raise the temperature of the reactor to 150°C, and carry out a constant temperature stirring reaction for 20-30min;

[0066] (3) Add polytetrafluoroethylene powder to the reaction kettle and carry out constant temperature refining and s...

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Abstract

The invention provides high-temperature-resistant polytetrafluoroethylene lubricating grease for sealing. The lubricating grease is prepared from, by mass, 30-70% of base oil, 25-55% of thickener, 2-5% of structural stabilizer, 1-5% of tackifier and 1-5% of lubricant. The invention further provides a preparation method of the lubricating grease, polytetrafluoroethylene micro powder serves as the thickener to thicken silicone oil as the base oil, meanwhile a certain amount of the structural stabilizer, the tackifier and the lubricant are added at the same time, and then the lubricating grease is prepared through corresponding preparation processes. The prepared polytetrafluoroethylene lubricating grease has excellent high temperature resistance, good sealing performance, excellent lubricity, adhesion and oxidation resistance, high load, water spraying resistance and other properties, the lubricating grease has no suncrack, oil splitting and hardening phenomena at the high temperature more than 200 DEG C, and has good sealing property, adhesion property and high temperature resistance.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a lubricating grease, in particular to a high-temperature-resistant lubricating and sealing grease and a preparation method thereof. Background technique [0002] As a commonly used lubricating medium, grease has excellent stability, oxidation resistance, mechanical stability, adhesion, extreme pressure wear resistance and sealing performance compared with existing lubricating oil lubrication, and is suitable for use in Lubricating parts for lubricating medium movement accuracy, load capacity, extreme pressure properties, speed and long service life of mechanical equipment. [0003] With the continuous development of industrial modernization, mechanical equipment and other lubricating parts require higher and higher requirements for the use of grease, and higher requirements are also put forward for the temperature resistance of grease. Most of the existing high-temperature lubrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M147/02C10M169/04C10N50/10C10N30/06C10N30/08C10N30/10
CPCC10M147/02C10M169/044C10M2201/061C10M2209/08C10M2213/062C10M2227/04C10M2229/0415C10M2229/0425C10N2030/06C10N2030/08C10N2030/10C10N2040/34C10N2050/10C10N2030/26C10N2030/36C10N2020/02
Inventor 白涛耿飞宋杰贾润萍左明明左晓兵沈志晨惠进德
Owner SHANGHAI INST OF TECH
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