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Perfluoropolyether type lubricating grease of composite thickening agent and preparation method of perfluoropolyether type lubricating grease

A technology of perfluoropolyether and perfluoropolyether oil, which is applied in lubricating compositions, petroleum industry, etc., can solve the problems of low volatility, complex process, and needs to be further improved, and achieve excellent anti-friction performance and simple preparation method Ease of handling and excellent thermal stability

Active Publication Date: 2022-01-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]At this stage, perfluoropolyether grease mostly uses a single polytetrafluoroethylene powder as a thickener. Patent document CN201710746093.6 invented a kind of Performance Perfluoropolyether grease, which uses a single polytetrafluoroethylene powder as a thickener, has simple components and simple process, and perfluoropolyether grease can effectively achieve low volatility under high temperature and high vacuum conditions. requirements, but the stencil oil separation and anti-wear properties of perfluoropolyether grease need to be further improved; CN 201811249942.8 discloses a perfluoropolyether grease and its preparation method, which adds a colloid modifier to improve the grease Stability, although the effect is obvious, but the process is more complicated

Method used

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  • Perfluoropolyether type lubricating grease of composite thickening agent and preparation method of perfluoropolyether type lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Put 20g of bentonite additive and 650g of perfluoropolyether oil in a mixer, start stirring for 1h, and the stirring speed is 1000r / min, and the obtained mixture is ultrasonicated in a water bath ultrasonicator, the ultrasonic temperature is 70°C, and the ultrasonic time is 1h, to obtain a homogeneous mixture;

[0050](2) Place 220g of chlorotrifluoroethylene-polyethylene copolymer (particle size 20μm) and 110g tetrafluoroethylene-hexafluoropropylene copolymer (particle size 0.06μm) in another stirrer, start stirring for 0.5h, and stir The speed is 1000r / min, mixed to form a composite thickener;

[0051] (3) Add the compound thickener obtained in (2) to the mixture obtained in step (1) and continue to stir for 1 hour at room temperature at a stirring speed of 1000r / min. Stir to obtain a homogeneous mixture and ultrasonicate it in a water bath ultrasonicator at a temperature of 50°C , Ultrasonic 1h.

[0052] (4) Place the mixture after ultrasonication in a three-ro...

Embodiment 2

[0054] (1) Put 30g of silicon dioxide additive and 700g of perfluoropolyether oil in a mixer, start stirring for 2 hours, the stirring speed is 1500r / min, the obtained mixture is ultrasonicated in a water bath ultrasonicator, the ultrasonic temperature is 70°C, ultrasonic Time is 2h, obtains homogeneous mixture;

[0055] (2) Place 180g polytetrafluoroethylene (particle size 1μm) and 90g tetrafluoroethylene-hexafluoropropylene copolymer (particle size 0.05μm) in another stirrer, start stirring for 1h, and the stirring speed is 1500r / min, Mix to form a compound thickener;

[0056] (3) Add the compound thickener obtained in (2) to the mixture obtained in step (1) and continue to stir for 2 hours at room temperature at a stirring speed of 1500r / min. Stir to obtain a homogeneous mixture and ultrasonicate in a water bath ultrasonicator at a temperature of 50°C , ultrasonic 2h.

[0057] (4) Place the mixture after ultrasonication in a three-roll mill and grind it repeatedly 4 times...

Embodiment 3

[0082] (1) Put 20g of silicon dioxide additive and 600g of perfluoropolyether oil in a mixer, start stirring for 1.5h, the stirring speed is 1000r / min, the obtained mixture is ultrasonicated in a water bath ultrasonicator, the ultrasonic temperature is 70°C, Ultrasonic time is 2h to obtain a homogeneous mixture;

[0083] (2) Put 253g polytetrafluoroethylene (particle size 1μm) and 127g tetrafluoroethylene-hexafluoropropylene copolymer (particle size 0.05μm) in another stirrer, start stirring for 1.5h, and the stirring speed is 1000r / min , mixed to form a composite thickener;

[0084] (3) Add the compound thickener obtained in (2) to the mixture obtained in step (1) and continue to stir for 1.5h. The stirring speed at room temperature is 1000r / min. Stir to obtain a homogeneous mixture and ultrasonicate it in a water bath ultrasonicator. The ultrasonic temperature is 70 ℃, ultrasonic for 1h.

[0085] (4) Place the mixture after ultrasonication in a three-roll mill and grind it...

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Abstract

The invention belongs to the field of lubricating materials, and particularly relates to perfluoropolyether type lubricating grease of a composite thickening agent and a preparation method of the perfluoropolyether type lubricating grease. The perfluoropolyether type lubricating grease comprises the following components in percentage by weight based on the total weight of the components: 55 to 85 weight% of perfluoropolyether oil, 12 to 42 weight% of a composite thickening agent and 0.1 to 3 weight% of an additive, and the composite thickening agent is selected from two or more of polytetrafluoroethylene, chlorotrifluoroethylene-polyethylene copolymer and tetrafluoroethylene-hexafluoropropylene copolymer. The perfluoropolyether type lubricating grease prepared by blending the perfluoropolyether oil serving as the base oil, the composite thickening agent and the additive has relatively good colloid stability, high temperature resistance and wear resistance, and the components and the preparation process are simple and easy to implement.

Description

technical field [0001] The invention belongs to the field of lubricating materials, and in particular relates to a perfluoropolyether lubricating grease with a compound thickener and a preparation method thereof. Background technique [0002] With the rapid development of science and technology economy, industrial equipment is constantly updated, and the environmental conditions are more complex and changeable, which makes the performance requirements of lubricating grease more stringent. Perfluoropolyether grease has excellent chemical stability; extremely high thermal oxidation stability; wide service temperature; low evaporation; good compatibility with sealing materials; strong radiation stability; Therefore, it is widely used in aerospace, aviation and special requirements. [0003] Perfluoropolyether grease is mainly refined from fluoropolymer thickened chemically stable perfluoropolyether oil and added with special additives. Grease can be thought of as a sponge whe...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/06
CPCC10M169/048C10M2213/0606C10M2213/0626C10M2213/026C10M2201/041C10M2201/066C10M2201/105C10M2201/103C10N2030/06
Inventor 李倩刘洋辛虎
Owner CHINA PETROLEUM & CHEM CORP
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