Composite lithium-base grease and method for making same

Abstract

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive. The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and/or lithium borate, and the mol ratio is 1 ®U 0.1 to 1 ®U 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent, dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener and the base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point, good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing function towards a damaged bearing.

Description

technical field [0001] The present invention relates to a kind of three groups which are composed of base oil, thickener and additives and have good high and low temperature performance, mechanical stability, colloidal stability, anti-wear and extreme pressure, and have the function of repairing damaged bearings. A lithium complex grease and a preparation method thereof. Background technique [0002] With the development of modern industry, steel, metallurgy, automobile, mining, printing and dyeing, aerospace and other industrial sectors have put forward more and more stringent requirements on the high and low temperature performance, wear resistance, extreme pressure resistance, water resistance and mechanical stability of lubricating grease. Requirements, lithium-based grease is difficult to meet these lubrication requirements, the use of complex lithium-based grease is more appropriate, but ordinary lithium-composite grease is sometimes difficult to meet the performance o...

AI Technical Summary

Problems solved by technology

[0005] In recent years, lithium complex grease has obtained great development at home and abroad, and literature has reported some patents (such as U.S. Patent USP3681242,3929651,3711407; Chinese patent CN 1052890A, 1052891A, 1055384A), these complex lithium-based greases are generally composed of 12-hydroxystearate lithium and dibasic acid or lithium salt of boric acid salicylic acid, and there are also three-component complexes, but these complex lithium The dropping point of the base grease is not high (less than 280°C), and the anti-wear and extreme pressure properties are not good enough (P of the four-ball test B Below 980N, P D lower than 4900N), the operating temperature is -20~200°C, and in some lubrication occasions (such as roll machines, tanks, cars, etc.) it is required that the grease has a higher dropping point (greater than 280°C), and a wider operating temperature range (-50 ~220℃), better anti-wear extreme pressure performance (maximum non-jamming load P of four-ball test B Greater than 980N, sintering load P D greater than 4900N), and has the function of repairing some slightly damaged bearings