Extreme-pressure lubricating grease and preparation method thereof

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...

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 different, generally hardening occurs at 120-150 ° C), and as the temperature increases, the hardening phenomenon becomes more obvious , often causes the moving parts to be stuck during high temperature operation, and even causes the moving parts to sinter together, resulting in the shutdown of the equipment

General lubricating grease is difficult to meet the lubrication requirements of heavy-duty equipment, and it is easy to cause lubrication failure

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