Lithium-base lubricating grease composition with low-pressure oil-separating and low-storage oil-separating performance

Abstract

The invention relates to a lithium base grease constituent which has low-pressure oil separation performance and low storage oil separation performance, and comprises base oil, thickening agent, solid fillers and additive, wherein the thickening agent are the metal salts which were produced through the reaction between one or more an acid of the C12 to C24 fatty acid and the lithium hydroxide; the grease constituent contents one or more solid packing which come from bentonite, graphite, molybdenum disulfide and silicon dioxide, and the solid packing is in the amount of 0.1 to 15wt percent of the grease constituent. The lithium base grease constituent is compared with the existing lithium base grease: the lithium base grease constituent Not only has good low-pressure oil separation performance and low storage oil separation performance, but also has good shear stability, colloidal stability, good performance and good high-temperature extreme pressure, anti-wear performance, and can be widely used in Bearings, gears and other industrial equipments which have high demands of oil separation performance.

Description

technical field [0001] The invention relates to a lubricant material, in particular to a lithium-based lubricating grease composition with low pressure oil separation and low storage oil separation properties. Background technique [0002] Lithium-based grease is the most common lubricant product in the world. It has the largest output in the world, the most widely used, shear resistance, and good additive sensitivity, but the use temperature is low (about 180°C); It is prepared by adding a complex agent to the base grease. Through complex production processes, the structure and shape of the thickener are changed, and the service temperature of the lubricant is increased (dropping point 280-330°C). However, the existing lubricant products, whether it is Lithium-based grease or complex lithium-based grease, the performance of pressure oil separation and storage oil separation is not ideal. With the increase of temperature and the extension of storage time...

AI Technical Summary

Problems solved by technology

[0002] Lithium-based grease is the most common lubricant product in the world. It has the largest output in the world, the most widely used, shear resistance, and good additive sensitivity, but the use temperature is low (about 180°C); It is prepared by adding a compounding agent to the base grease. Through complex production processes, the structure and shape of the thickener are changed, and the service temperature of the lubricant is increased (dropping point 280-330°C). However, the existing lubricant products, whether it is Lithium-based grease or complex lithium-based grease, the performance of pressure oil separation and storage oil separation is not ideal. With the increase of temperature and the extension of storage time, the base oil will be separated from the grease, causing the grease to dry out , become hard, cannot be used, and the production cost and technical difficulty are also high

[0003] Chinese patents CN1055384A, CN1252434A disclose that the lithium-based grease composition that adds compounding agent is exactly typical compound lithium-based grease, and it comprises base oil, thickener, compounding agent and additive, although has good shear stability, colloid Stability and good high temperature performance, but the oil separation performance is not satisfactory. If the base oil with lower viscosity is used, the result will be worse, which will cause a large amount of oil separation during storage and use, and early failure