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Chemical-medium-resistant fluorosilicone lubricating grease and preparation method thereof

A lubricating grease and chemical-resistant technology, which is applied in the field of chemical-resistant fluorosilicon grease and its preparation, can solve the problems of solvent resistance, insufficient high temperature resistance, performance degradation and aging of lubrication protection, etc., and achieve good chemical-resistant performance , Improve high temperature performance and good lubricating performance

Active Publication Date: 2020-11-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing traditional fluorosilicone grease is used in some special ambient temperatures, there are problems such as insufficient oil resistance, solvent resistance, and high temperature resistance, resulting in a significant decrease in its lubrication and protection performance, especially when it is operated for a long time at a working condition above 220°C Significant aging will occur due to the intensified oxidation reaction. Therefore, with the development of material science and mechanical technology, the limitations of traditional fluorosilicone grease in terms of high and low temperature resistance have become more and more prominent.

Method used

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  • Chemical-medium-resistant fluorosilicone lubricating grease and preparation method thereof
  • Chemical-medium-resistant fluorosilicone lubricating grease and preparation method thereof
  • Chemical-medium-resistant fluorosilicone lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Select the kinematic viscosity at 25°C as 3000mm 2 / s fluorosilicone oil and linear perfluoropolyether oil (p=5~35, q=0.25~0.87) with an average molecular weight of 1000~3000, mix the two and heat to 35°C, stir mechanically for 1.5h to obtain a compound Fluorine-containing base oil (6wt% linear perfluoropolyether oil and 94wt% fluorosilicone oil); add 60g of composite fluorine-containing base oil to the grease stirring reactor, heat to 60°C, keep the temperature for 30min, add tetrafluoroethylene Ethylene-hexafluoropropylene copolymer thickener, its weight is 22g, stirred for 1h; after cooling to room temperature 25°C, add high-temperature performance improver chlorotrifluoroethylene telomer, its weight is 6g, stirred for 30min; use grinding equipment to grind 3 times, and then carry out vacuum degassing post-treatment to the lubricating grease after grinding, and the properties of the finished lubricating grease are as shown in Table 1 below.

Embodiment 2

[0049] Select the kinematic viscosity at 25°C as 5000mm 2 / s fluorosilicone oil and linear perfluoropolyether oil with an average molecular weight of 2,000 to 5,000 are mixed, heated to 40°C, and mechanically stirred for 1.5 hours to obtain a composite fluorine-containing base oil (5wt% linear perfluoropolyether oil) ether oil and 95wt% fluorosilicone oil); add 68g of composite fluorine-containing base oil in the grease stirring reactor, heat to 60°C, keep the temperature for 30min, add tetrafluoroethylene-hexafluoropropylene copolymer, its weight is 10g, Stir for 1 hour; cool to room temperature at 20°C and add silica, a high-temperature performance improver with a weight of 9 g, and stir for 30 minutes; use grinding equipment to grind twice, and then perform vacuum degassing post-treatment on the ground grease to obtain lubricating oil Fat products, packaging.

Embodiment 3

[0051] Select the kinematic viscosity at 25°C as 10000mm 2 / s fluorosilicone oil and linear perfluoropolyether oil with an average molecular weight of 3,000 to 6,000 are mixed, heated to 40°C, and mechanically stirred for 1.5 hours to obtain a composite fluorine-containing base oil (8wt% linear perfluoropolyether oil) ether oil and 92wt% fluorosilicone oil); add 70g of composite fluorine-containing base oil to the grease stirring reactor, heat to 60°C, keep the temperature constant for 30min, add polytetrafluoroethylene thickener with a weight ratio of 25g, and stir for 1h ;After cooling to room temperature 30°C, add the high-temperature performance improver molybdenum dioxide with a weight ratio of 5g, and stir for 30 minutes; use grinding equipment to grind twice, and then perform vacuum degassing post-treatment on the ground grease to obtain the finished grease ,Package.

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Abstract

The invention provides chemical-medium-resistant fluorosilicone lubricating grease and a preparation method thereof. The fluorine-silicon lubricating grease comprises the following components in percentage by weight: 60-80wt% of composite fluorine-containing base oil; 10-35 wt% of a thickening agent; and 1-15 wt% of a high temperature performance improver; wherein the composite base oil comprisesfluorosilicone oil and linear perfluoropolyether oil. The fluorosilicone lubricating grease provided by the invention has excellent chemical medium resistance and high temperature resistance, can be used under extremely harsh working conditions such as 220 DEG C or above and strong chemical active media, and can effectively reduce friction and protect normal operation of equipment, so that the service life of the equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lubricating materials, in particular to a chemical-medium-resistant fluorosilicon lubricating grease and a preparation method thereof. Background technique [0002] With the continuous change of modern industrial technology, the rapid development of industrial technology fields such as petrochemical industry, automobile industry and gas processing industry has been promoted. At the same time, the types of related mechanical products in the industrial field have become more complicated and the working conditions have become more stringent. The updating and upgrading of mechanical equipment has also continuously improved the performance requirements of lubricating grease, especially the mechanical equipment used in some complex working conditions has increasingly stringent requirements on the performance of lubricating grease products. motivation. [0003] Fluorosilicone oil is widely used in the lubricati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M177/00C10N30/06C10N30/10C10N30/12C10N30/02C10N30/08C10N40/02
CPCC10M169/00C10M177/00C10M2229/0415C10M2209/1033C10M2209/1055C10M2209/1085C10M2213/0613C10M2213/0626C10M2211/022C10M2201/105C10M2201/062
Inventor 刘洋曹春兰辛虎
Owner CHINA PETROLEUM & CHEM CORP
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