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Perfluoropolyether grease for long-life high-temperature bearings and preparation method and application of perfluoropolyether grease

A perfluoropolyether, high-temperature bearing technology, used in lubricating compositions, petroleum industry, additives, etc., can solve the problems of inability to provide long-term lubrication protection, coking and carbon deposition, and excessive evaporation, and achieve excellent extreme pressure and wear resistance. and oxidation stability, low temperature conditions, and simple preparation process.

Inactive Publication Date: 2018-10-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a perfluoropolyether lubricating grease for long-life high-temperature bearings and its preparation method and application. technical problems such as coking and carbon deposition, excessive evaporation, and inability to provide long-term lubrication protection; in addition, the preparation process of the perfluoropolyether grease of the present invention is simple, and can be prepared under relatively low temperature conditions

Method used

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  • Perfluoropolyether grease for long-life high-temperature bearings and preparation method and application of perfluoropolyether grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 5g molybdenum disulfide (commercially purchased from Pioneer Molybdenum Industry Co., Ltd. high-purity molybdenum disulfide) at 50°C and add it to 600g perfluoropolyether (available from Solvay perfluoropolyether lubricating oil M, molecular formula CF 3 -O-(CF 2 -CF 2 -O) m -(CF 2 -O) n -CF 3 , m=150, n=52), stirred for 1 h, and heated up to 60°C in a water bath ultrasonicator for 1 h. Add 400g of polytetrafluoroethylene thickener at 70°C, stir for 1 hour, and grind for 1 hour on a three-roll mill, then vacuum degass the grease after grinding, and then pack it.

Embodiment 2

[0028] Take 5g of petroleum sulfonate barium (commercially available from Jinzhou Shengda Chemical Co., Ltd. T701 petroleum sulfonate barium) at 60°C and add to 1.4kg of perfluoropolyether (available from Solvay perfluoropolyether lubricating oil M, molecular formula CF 3 -O-(CF 2 -CF 2 -O) m -(CF 2 -O) n -CF 3 , m=180, n=76), stirred for 1.5h, ultrasonicated in a water bath ultrasonicator at 60°C for 1.5h, then added 600g of calcium carbonate thickener at 60°C, stirred for 1h, and ground on a three-roll mill for 1.5h, then Carry out vacuum degassing post-treatment to the lubricating grease after grinding, and pack it.

Embodiment 3

[0030] Take 15g of molybdenum disulfide (commercially purchased from Pioneer Molybdenum Industry Co., Ltd. high-purity molybdenum disulfide) at 40°C and add it to 2.1kg of perfluoropolyether oil (available from Solvay perfluoropolyether lubricating oil M, molecular formula CF 3 -O-(CF 2 -CF 2 -O) m -(CF 2 -O) n -CF 3 , m=200, n=55), stirred for 2h, raised the temperature to 60°C and sonicated in a water bath ultrasonicator for 1.5h, then added 900g of bentonite thickener at 70°C, stirred for 1.5h, and ground on a three-roll mill for 2.5 h, and then carry out vacuum degassing post-treatment to the ground lubricating grease, and then pack it.

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Abstract

The invention provides perfluoropolyether grease for long-life high-temperature bearings and a preparation method and application of the perfluoropolyether grease. The perfluoropolyether grease is prepared from, by weight, 60-80% of perfluoropolyether, 20-40% of a thickening agent and 0.01-0.5% of an additive. The chemical formula of perfluoropolyether is CF3-O-(CF2-CF2-O)m-(CF2-O)n-CF3, wherein mand n are respectively selected from integers between 1 and 500 independently; the additive is the combination of one or multiple of molybdenum disulfide, sodium nitrite, barium petroleum sulfonate and benzothiazole. Technical problems of coking and carbon deposition, too fast evaporation and failure to provide long-term lubrication protection under the high temperature working condition of the bearings are solved through the perfluoropolyether grease ; in addition, the perfluoropolyether grease is simple in preparation process and can be obtained at relatively low temperature.

Description

technical field [0001] The invention relates to the technical field of lubricating materials, in particular to the technical field of high-temperature bearing lubrication. Background technique [0002] With the improvement of industrial level, more and more lubricating parts require higher working temperature, and the requirements for lubricating grease are also gradually increased. High temperature bearing grease is mainly used in heat setting machine bearings, flat printing machine bearings, garbage power incinerator bearings, blower bearings, etc. in the printing and dyeing industry. Most of the base oils used in high temperature bearing greases on the market today are mineral oil, silicone oil, PAO and synthetic ester oil. This kind of lubricating grease has the following defects: easy to separate oil and soften at high temperature, easy to volatilize, easy to produce coking and carbon deposits, low extreme pressure and anti-wear performance, and poor bearing capacity. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00C10N50/10C10N40/02C10N30/06C10N30/08C10N30/10
CPCC10M161/00C10M2201/062C10M2201/066C10M2201/1036C10M2213/06C10M2213/0626C10M2219/044C10M2219/104C10N2010/04C10N2030/06C10N2030/08C10N2030/10C10N2040/02C10N2050/10
Inventor 郭俊李杏涛曹春兰
Owner CHINA PETROLEUM & CHEM CORP
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