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A kind of perfluoropolyether type lubricating grease and preparation method thereof

A technology of perfluoropolyether and lubricating grease, which is applied in the direction of lubricating composition and petroleum industry, can solve the problems of complex preparation process, low yield, and limited applicable working conditions, and achieve good compatibility, simple process, and high thermal stability sexual effect

Active Publication Date: 2022-07-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent "CN201610546160.5 A long-life high-temperature bearing grease and its preparation method" discloses a chemical-resistant grease, the ingredients used are octadecylamine, cyclohexylamine, MDI, calcium petroleum sulfonate, petroleum ether , mineral oil, antioxidant, extreme pressure antiwear agent, oily agent, stabilizer, tackifier and rust inhibitor, its preparation process is complicated and requires more raw materials, and the yield is low. The lubricating grease prepared by this method The high and low temperature resistance performance is average, and the applicable working conditions are relatively limited; while the perfluoropolyether base oil has good high and low temperature resistance performance, and there is no public report on the anti-chemical medium grease containing perfluoropolyether base oil as the active ingredient

Method used

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  • A kind of perfluoropolyether type lubricating grease and preparation method thereof
  • A kind of perfluoropolyether type lubricating grease and preparation method thereof
  • A kind of perfluoropolyether type lubricating grease and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] 1) Weigh 70g of perfluorinated base oil 1, 30g of polytetrafluoroethylene, and 2g of silicon dioxide into a vacuum emulsifying mixer, control the stirring speed of the vacuum emulsifying mixer to be 500 rpm, and stir the mixture to a white ointment for 2h

[0053] 2) Turn on the vacuuming device after stopping stirring, and keep the vacuum degree at 200Pa and 60°C; stop the vacuuming after no bubbles are generated on the surface of the ointment, and keep the temperature for 2 hours; place the obtained mixture on the grinding device and grind it repeatedly for 3 times until Uniform, that is, a perfluoropolyether type grease is obtained.

Embodiment 2

[0055] 1) Weigh 130g of perfluorinated base oil 3, 70g of polytetrafluoroethylene, and 3g of graphite into a vacuum emulsification mixer, control the stirring speed of the vacuum emulsification mixer to be 500rpm, and stir the mixture to a white ointment for 2h;

[0056] 2) Turn on the vacuuming device after stopping stirring, and keep the vacuum degree at 200Pa and 60°C; stop the vacuuming after no bubbles are generated on the surface of the ointment, and keep the temperature for 2 hours; place the obtained mixture on the grinding device and grind it repeatedly for 5 times until Uniform, that is, a perfluoropolyether type grease is obtained.

Embodiment 3

[0058] 1) take by weighing 150g perfluoro base oil 1 and 200g perfluoro base oil 2, 150g chlorotrifluoroethylene-polyethylene copolymer, 10g molybdenum disulfide is placed in the vacuum emulsification mixer, and the stirring speed of the control vacuum emulsification mixer is 500rpm, The mixture was stirred to a white paste for 2h;

[0059] 2) Turn on the vacuuming device after stopping stirring, and keep the vacuum degree at 200Pa and 60°C; stop the vacuuming after no bubbles are generated on the surface of the ointment, and keep the temperature for 2 hours; place the obtained mixture on the grinding device and grind it repeatedly for 5 times until Uniform, that is, a perfluoropolyether type grease is obtained.

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Abstract

The invention discloses a perfluoropolyether type lubricating grease. The weight percentage of each component in the lubricating grease is as follows: perfluorinated base oil: 52%-80%, preferably 62%-75%; Chemical agent: 16% to 45%, preferably 22% to 35%; additive: 1% to 5%, preferably 2% to 4%; wherein, the molecular weight of the perfluorinated base oil is 3000 to 30000g / mol, preferably 8000~20000g / mol. The present invention also provides a method for preparing the above lubricating grease, comprising: 1) emulsification of perfluorinated base oil, thickener and additives under stirring to obtain grease; 2) vacuuming the grease to obtain the grease The perfluoropolyether type greases described above. The lubricating grease provided by the invention has high thermal stability and oxidative stability, and the preparation method of the invention has a short reaction route, readily available raw materials, high yield and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of lubricating materials, and more particularly relates to a perfluoropolyether type lubricating grease and a preparation method thereof. Background technique [0002] With the development of modern industry, more and more mechanical parts need to be in contact with various acids, alkalis, salts, corrosive gases and strong oxidant media, which puts forward higher requirements for the chemical corrosion resistance of grease. [0003] Traditional chemical-resistant grease is made by mixing base oil, antioxidant, extreme pressure anti-wear agent, oily agent, stabilizer, tackifier and rust inhibitor, and then reprocessing. For example, the patent "CN201610546160.5 A long-life high-temperature bearing grease and its preparation method" discloses a kind of grease resistant to chemical corrosion. The components used are octadecylamine, cyclohexylamine, MDI, calcium petroleum sulfonate, petroleum ether , mineral oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/00C10N30/06C10N30/08C10N30/10C10N30/12
CPCC10M169/00C10M2213/0606C10M2213/0626C10M2201/105C10M2201/041C10M2205/022C10M2213/026C10M2201/066
Inventor 乔姣飞李伟东辛虎
Owner CHINA PETROLEUM & CHEM CORP