Extreme-pressure lubricating grease and preparation method thereof

A lubricating grease and extreme pressure technology, applied in the field of lubricating grease, can solve the problems that the lubricating grease is difficult to meet the lubrication requirements of heavy-duty equipment, the moving parts are sintered together, and the equipment lubrication fails, so as to achieve good high temperature performance and improve load bearing capacity , Improve the effect of extreme pressure performance

Active Publication Date: 2010-01-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general-purpose high-temperature greases usually include composite aluminum-based greases and urea-based greases. Among them, the composite aluminum-based greases become soft and lose at high temperatures (generally, the softening is obvious above 120°C, and loss occurs), causing equipment lubrication. Failure; and urea-based grease, hardening at high temperature (according to different urea-based greases, the hardening temperature is

Method used

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  • Extreme-pressure lubricating grease and preparation method thereof

Examples

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Comparison scheme
Effect test

example 1

[0026] Add 90 grams of MDI to 1500 grams of autoclave oil, heat to 60°C, add 45 grams of octylamine and 35 grams of aniline to 600 grams of oil, heat to 60°C, and mix well (these three raw materials are passed through chemical reaction to generate component B), add 51 grams of stearic acid, 26 grams of benzoic acid, 18.4 grams of triisopropoxy aluminum, rise to 90 ° C, keep the temperature for 1 hour (these three raw materials react at a certain temperature to form group A 1 minute), continue heating to 120°C, add 6.5 grams of tap water, and keep the temperature constant for 1 hour (during this process, component B and component A further react to form a new type of grease composition), continue to heat the material to 160°C, and keep the temperature constant for 10 Minutes (the new grease composition is further stabilized), add 700 grams of quenching oil, and when the temperature drops below 120°C, sequentially add 15.2 grams of diphenylamine, 30.2 grams of vanlube829, and 30....

example 2

[0041] Add 90 grams of MDI to 1500 grams of autoclave oil and heat to 80°C. At the same time, add 66.8 grams of dodecylamine and 34.6 grams of cyclohexylamine to 600 grams of oil and heat to 80°C. Mix well and add hard 102 grams of fatty acid, 58.8 grams of methyl-benzoic acid, 73 grams of aluminum isopropoxide, constant temperature for 1 hour, continue to heat to 100 ° C, add 26 grams of tap water, constant temperature for 1 hour, continue to heat up the material to 170 ° C, constant temperature for 0.5 hours , 700 grams of accelerated cooling oil, when the temperature drops to 120 ° C, sequentially add 22.6 grams of N-phenyl-α-naphthylamine, 48.4 grams of vanlube8294, and 38.7 grams of dodecenylsuccinic acid, and carry out after stirring. Processed finished fat. Carry out aftertreatment after stirring evenly, the lubricating grease performance that the present invention's process formula makes is listed in table 2

[0042] Table 2

[0043] Pilot projects

Samp...

example 3

[0056] Add 28.4 grams of TDI to 2600 grams of autoclave oil and heat to 100°C. At the same time, add 48.5 grams of octadecylamine and 19.3 grams of p-toluidine to 600 grams of oil and heat to 100°C. Mix well and add hard 77 grams of fatty acid, 39 grams of benzoic acid, 55 grams of aluminum isopropoxide, at 100 ° C, constant temperature 1.2 hours, continue to heat to 140 ° C, add 14.6 grams of tap water, constant temperature 1.5 hours, continue to heat up the material to 190 ° C, constant temperature 30 Minutes, 680 grams of rapid cooling oil, when the temperature dropped to 110 ° C, sequentially added 17.6 grams of diphenylamine, 17.6 grams of 2,6-di-tert-butyl-p-cresol, 70.5 grams of vanlube972, and 35.2 grams of barium dinonylnaphthalenesulfonate, After stirring evenly, post-processing is carried out to obtain the finished fat. The performance of the lubricating grease that process formula of the present invention makes is listed in table 3

[0057] table 3

[0058] ...

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Abstract

The invention relates to extreme-pressure lubricating grease and a preparation method thereof. The lubricating grease comprises the following components in percentage by weight: 80-92 percent of tempered oil taking mineral oil, synthetic oil or both the mineral oil and the synthetic oil as base oil, 5-13 percent of thickening agent, 0.5-1 percent of antioxidizer, 1-5 percent of extreme pressure agent and 1-1.5 percent of rust inhibitor. A one-step saponification campsite process is adopted. Due to the adoption of a proper raw material proportion, the lubricating grease has favorable high temperature performance, a drop point is larger than 235 DEG C, the thickness obviously becomes good along with the change of the temperature, and the requirement on use with wide temperature range is satisfied. The invention has the advantages of nonhardening at high temperature and low cost when compared with polyurea lubricating grease, also has favorable adhesiveness when being compared with composite aluminum, and improves the extreme-pressure performance and the load resisting capacity of the lubricating grease. The lubricating grease of the invention is prepared in one step by direct composite reaction, thereby ensuring simple process, saving the energy consumption and lowering the production cost; in addition, the quality of products produced by the process is also more stable.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to an extreme-pressure lubricating grease and a preparation method thereof. Background technique [0002] Grease is usually divided into soap-based grease and non-soap-based grease, of which soap-based grease is the most commonly used grease, whether it is soap-based grease or non-soap-based grease, the grease itself is characterized by changes with temperature, The consistency of lubricating grease changes greatly, especially high-temperature grease. Although it has a high dropping point (dropping point greater than 300°C), as the temperature rises, the lubricating grease becomes soft and loses or becomes hard and coked, and has lost its lubricating effect. At present, the general-purpose high-temperature lubricating grease usually includes composite aluminum-based grease and urea-based grease, among which the composite aluminum-based grease becomes soft and loses at hig...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N30/10C10N30/06C10N30/12
Inventor 高艳青李素刘庆廉李德晶董禄虎冯玉宝
Owner CHINA PETROLEUM & CHEM CORP
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