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Composite lithium-base grease and method for making same

A lithium-composite, lubricating grease technology, applied in lubricating compositions, base materials, thickeners, etc., can solve the problems of insufficient anti-wear and extreme pressure, achieve good mechanical stability, colloidal stability, and outstanding anti-wear Extreme pressure, high dropping point effect

Active Publication Date: 2010-05-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dropping point of these lithium complex greases is not high (less than 280°C), and the anti-wear and extreme pressure properties are not good enough (P in the four-ball test) B Below 980N, P D lower than 4900N), the operating temperature is -20~200°C, and in some lubricating occasions (such as roll machines, tanks, automobiles, 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, the mixed oil of mineral oil A and B is used as the base oil to prepare a small-scale test of three-component lithium composite grease. The properties of mineral oil A and B are shown in Table 1

[0025] Get 246 grams of mineral oil A and 106 grams of mineral oil B to mix as test base oil, get 176 grams of mixed base oil and add in the fat-making kettle, add 33.2 grams of 12-hydroxystearic acid, 11.2 grams of sebacic acid, 3.4 grams of boric acid, and heat up to Add lithium hydroxide aqueous solution (containing 12.0 grams of lithium hydroxide monohydrate) at 95-105°C for saponification for 2 hours. After saponification, heat up and dehydrate, add 176 grams of mixed base oil, and continue to heat up to the highest refining temperature of 230-240°C. Keep cooling for 10 minutes to 110-130°C and add composite additives: 1.2g diphenylamine, 2g barium petroleum sulfonate, 1.2g benzotriazole, 10g antimony dialkyldithiocarbamate, 4g vulcanized olefin cottonseed...

Embodiment 2

[0027] This example is an enlarged test of Example 1 on a medium-sized device, and the ratio of the grease composition formula is the same as that of Example 1, and the reaction is carried out in a pressurized saponification kettle. Mix 62 kg of mineral oil A and 26 kg of mineral oil B as the test base oil, take 44 kg of the mixed base oil and add it to the saponification kettle, and add 8.3 kg of 12-hydroxystearic acid, 2.8 kg of sebacic acid, and 0.85 kg of boric acid after heating up to 60-70 °C kg, heat up to 85-95°C, add lithium hydroxide aqueous solution (containing 3 kg of lithium hydroxide monohydrate) for saponification for 1.5 hours, open the exhaust valve after saponification, dehydrate while exhausting, and continue to heat up. Add 22kg of mixed base oil after dehydration is completed, continue to heat up to the highest refining temperature of 230-240°C, and keep for 10 minutes. Transfer the thickened product to the blending kettle, clean the saponification kettle ...

example 3

[0029] This example illustrates the small-scale test of using poly-alpha-olefin oil as the base oil to prepare three-component lithium complex grease (see Table 1 for the properties of the poly-alpha-olefin oil used). In addition to the different base oils, the composition formula and preparation of the grease The method is the same as Example 1. The prepared lithium complex grease has better low temperature and oxidation stability than Example 1, and can meet the use requirements in the range of -50 to 220°C. The measurement data of example 3 are shown in Table 2.

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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 : 0.1 to 1 : 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 andthe 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 functiontowards 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10M133/44C10M159/04C10M135/18C10M159/08C10M117/02C10M107/02C10N30/12C10N30/06
Inventor 龚晓晖秦俪萍冯乐刚孙中华朱建华刘丽君强永席凌伟红丁建芬区志军李淑云马丽华玲珍殷玉敏王伟蔡蓉
Owner BC P INC CHINA NAT PETROLEUM CORP
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