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High-low temperature lubricating grease composition and preparation method thereof

A grease composition, high and low temperature technology, applied in lubricating composition, petroleum industry, etc., can solve the problems of poor anti-wear and anti-friction of high and low temperature grease, poor high temperature performance of low temperature grease, no grease and other problems, Achieve excellent wear resistance, improve high temperature life, and high dropping point

Active Publication Date: 2018-06-01
武汉博达特种润滑技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) Most high-temperature greases cannot take into account low temperature, and the high-temperature performance of low-temperature grease is also poor;
[0006] 3) All high and low temperature greases have poor anti-wear and anti-friction properties;
[0007] 4) Short service life
There are no relevant patents and literature reports on chlorophenyl silicone oil used as base oil for grease and iron-based manganese-based compound as antioxidant, and grease with a wide temperature range of -70°C to +250°C is used at the same time There is also no relevant patent and literature report

Method used

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  • High-low temperature lubricating grease composition and preparation method thereof
  • High-low temperature lubricating grease composition and preparation method thereof
  • High-low temperature lubricating grease composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) 12 kilograms of chlorophenyl silicone oil (V 25 =97.33mm 2 / s, the following steps use chlorinated phenyl silicone oil with the same viscosity) and 6.88 kg of diphenylmethane-4,4'-diisocyanate into the reaction kettle, heat up and stir to 80°C ± 5°C, and then are completely dissolved;

[0056] 2) Then add 52.7 kg of chlorophenyl silicone oil into the reaction kettle, lower the temperature to 50±5°C, and slowly add 17 kg of chlorophenyl silicone oil and 5.12 kg of aniline mixed solution within 40±5 minutes to react . After the addition, react for 30±5 minutes, then slowly raise the temperature to 130-135°C, the heating time is 45±5 minutes, and then stir at constant temperature for 60±5 minutes;

[0057] 3) Then add 5 kilograms of polytetrafluoroethylene ultrafine powder, 0.5 kilograms of iron octoate, 0.5 kilograms of tricarbonyl cyclopentadienyl manganese and 0.3 kilograms of benzotriazole, stir and mix for 15 ± 5 minutes, and into the barrel;

[0058] 4) Cool ...

Embodiment 2

[0060] 1) 57.5 kilograms of chlorophenyl silicone oil (V 25 =156.49mm 2 / s, the following steps use chlorinated phenyl silicone oil with the same viscosity) and 43.1 kg of diphenylmethane-4,4'-diisocyanate into the reaction kettle, heat up and stir to 80°C ± 5°C, and then are completely dissolved;

[0061] 2) Add 259 kg of chlorophenyl silicone oil to the reaction kettle, lower the temperature to 50±5°C, and slowly add 81 kg of chlorophenyl silicone oil and 36.9 kg of p-toluidine mixed solution within 75±5 minutes Carry out the reaction, react for 60±5 minutes after the addition, then slowly raise the temperature to 130-135°C, the heating time is 60±5 minutes, and then stir at constant temperature for 90±5 minutes;

[0062] 3) Then add 15 kg of polytetrafluoroethylene superfine powder, 5 kg of iron octoate, 1 kg of benzotriazole, and 1.5 kg of 2,5-dithio-1,3,4-thiadiazole Derivatives, stirred and mixed for 15±5 minutes, discharged into the bucket;

[0063] 4) Cool naturall...

Embodiment 3

[0065] 1) 120 kilograms of chlorophenyl silicone oil (V 25 =227.17mm 2 / s, the following steps use chlorinated phenyl silicone oil with the same viscosity) and 103.2 kg of diphenylmethane-4,4'-diisocyanate into the reaction kettle, heat up and stir to 80°C ± 5°C, and make the are completely dissolved;

[0066] 2) Then add 500 kg of chlorophenyl silicone oil into the reaction kettle, lower the temperature to 50±5°C, and slowly add 146 kg of chlorophenyl silicone oil and 76.8 kg of aniline mixed solution within 80±5 minutes to react . After the addition, stir and react for 75±5 minutes, then slowly raise the temperature to 130-135°C, the heating time is 75±5 minutes, and then stir at constant temperature for 90±5 minutes;

[0067] 3) Then add 40 kg of polytetrafluoroethylene superfine powder, 12 kg of 1,1'-diacetylferrocene and 2 kg of benzotriazole derivatives in sequence, stir and mix for 15 ± 5 minutes, and discharge into the barrel;

[0068] 4) Cool naturally to room te...

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PUM

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Abstract

The invention provides high-low temperature lubricating grease composition. The high-low temperature lubricating grease composition is prepared from components in percentage by mass as follows: 61%-93.7% of chlorophenyl silicone oil, 5%-25% of a di-urea thickener, 1%-10% of polytetrafluoroethylene superfine powder, 0.2%-3% of an antioxidant and 0.1%-1% of a metal deactivator. The invention also discloses a preparation method of the high-low temperature lubricating grease composition. High-low temperature lubricating grease has excellent high-temperature property, can be used in the high-temperature environment at 250 DEG C for a long term, also has excellent low-temperature property, can be normally used in the low temperature environment at subzero 70 DEG C and is the lubricating grease with the widest use temperature range at the high temperature and the low temperature. The provided high-low temperature lubricating grease is applicable to lubrication of work bearings in the wide temperature range under the work conditions of high temperature, low temperature, high speed and the like and applicable to lubricating and protection of bearings required to be operated in high-temperature environments such as aerospace motors, electrical bearings, plastic stretching machines, polyester thermosetting machines, racing car hubs and the like and in the extremely cold regions such as the Antarctic region and the Arctic region.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to a high-low temperature lubricating grease composition and a preparation method thereof. Background technique [0002] High and low temperature grease is a kind of multi-purpose grease that can meet certain high temperature requirements and can also be used in low temperature environments. It is widely used in various industrial fields, military industry and aerospace. For example, the lubricating grease used in the precision bearings of the aircraft is not only required to meet the high temperature environment caused by friction with the atmosphere during the lift-off process, but also required to meet the low temperature environment below -50°C or even -70°C in the sky. Another example is the wheel bearings of automobiles. The lubricating grease used also needs to meet the high-temperature working requirements that generate a lot of frictional heat during ...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M169/06C10N30/06C10N50/10C10N30/08C10N30/10C10N40/02
CPCC10M169/044C10M169/06C10M2213/062C10M2215/102C10M2215/223C10M2219/106C10M2227/09C10M2229/0515C10N2030/06C10N2030/08C10N2030/10C10N2040/02C10N2050/10C10N2020/02
Inventor 曹杰
Owner 武汉博达特种润滑技术有限公司
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