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Composite lithium grease and preparation method thereof

A lithium-composite and lubricating grease technology, which is applied in lubricating compositions and the petroleum industry, can solve the problems of mechanical stability and anti-wear extreme pressure, and achieve good anti-wear extreme pressure performance, high dropping point, Strong antioxidant effect

Inactive Publication Date: 2010-05-12
南通山浦润滑油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the insufficient high-temperature performance, mechanical stability and extreme pressure resistance of the prior art, the present invention proposes a lithium-composite grease and a preparation method thereof. The prepared grease has high-temperature performance, The advantages of good wear resistance and extreme pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this experiment, mineral oil A and mineral oil B were used as base oils to prepare a small-scale test of two-component lithium composite grease. The properties of mineral oil A and B are shown in Table 1

[0023] Mix 130g of mineral oil A and 65g of mineral oil B as the test base oil, add 1 / 3 of the mixed base oil into the saponification kettle, add 18.5 grams of 12-hydroxystearic acid, and heat up to 95-115 grams of sebacic acid. Add lithium hydroxide aqueous solution (containing lithium hydroxide monohydrate 5.4g) at ℃, saponify for 2-3 hours, heat up and dehydrate after saponification, raise the temperature to 120-140℃ for 2 hours, add 1 / 3 of the mixed base oil to thicken , continue to heat up to the highest refining temperature of 180-220°C, keep it for 2-3 minutes, use the remaining base oil to cool down to 130-150°C, add additives: diphenylamine 0.8g dinonyl naphthalene sulfonate barium 1g aminothio 6.6g of ester, stirred evenly, sheared, homogenized, ground, a...

Embodiment 2

[0025] Take 219g of mineral oil A and 219g of mineral oil B as the test base oil, take part of mineral oil A and add it to the saponification kettle, add 46g of 12-hydroxystearic acid and 16g of sebacic acid, heat up to 95-115°C and add (containing lithium hydroxide monohydrate 13.5g) of lithium hydroxide aqueous solution, saponified for 2 hours, after saponification, heat up and dehydrate, add part of mineral oil B to thicken, continue to heat up to 120-140°C for 2 hours, then continue to heat up to 180-220°C, keep for 2-3 minutes , add the remaining mineral oil B to the saponification kettle to lower the temperature to 130-150°C, add additives; Stir, shear, homogenize, grind, and degas to obtain the complex lithium grease product. The dropping point of the grease obtained is greater than 280°C, with excellent anti-rust and anti-corrosion performance, strong anti-oxidation performance, and good anti-wear and extreme pressure performance. , the measurement data of Scheme 2 are...

Embodiment 3

[0027] Take 292g of mineral oil A and 146g of mineral oil as the test base oil. Except that the proportion of base oil is different, the proportions and preparation methods of other components of lubricating grease are the same as those of Scheme 1. The measurement data of Scheme 3 are shown in Table 2

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Abstract

The invention provides composite lithium grease and a preparation method thereof. The composite lithium grease comprises the following components by weight percent: 4-10 percent of hydroxyl fatty acid of C12-C14, 1-4 percent of dibasic acid of C4-C18, 1-4 percent of lithium hydroxide, 0.1-1 percent of organic amine antioxidant, 0.3-1 percent of anti-corrosion rust inhibitor, 1-5 percent of antiwear extreme pressure additive and the balance of base oil. The preparation method comprises the following steps of mixing the base oil with the hydroxyl fatty acid of C12-C14and the dibasic acid of C40C18, heating the mixture to 80-115 DEG C, and adding lithium hydroxide monohydrate aqueous solution to perform saponification reaction, then carrying out dehydration, raising the temperature to 130-180 DEG C to carry out constant-temperature refining, raising the temperature to 200-220 DEG C to carry out highest temperature refining, adding the residual base oil and the additives, cooling and grinding to obtain the composite lithium grease. The composite lithium grease has the advantages of high dropping point, favorable high temperature performance, mechanical stability, antiwear and extreme pressure property, corrosion and rust resistance, and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite lithium-based lubricating grease with good high-temperature performance, mechanical stability, anti-wear extreme pressure, anti-corrosion and anti-rust properties, which is composed of base oil, thickener and additives. Background technique [0002] With the development of modern industry, industrial sectors such as bearings, automobiles, printing and dyeing, and aerospace have put forward more and more stringent requirements for the high and low temperature performance, anti-wear extreme pressure, water resistance, and mechanical stability of grease. Lithium-based lubrication It is difficult for grease to meet these lubrication requirements. It is more appropriate to use lithium complex grease. Ordinary lithium complex grease is sometimes difficult to meet the performance requirements of high drop point resistance and shear resistance. However, the performance of the base grease often cannot...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N30/06
Inventor 徐境福朱益锋刘璐
Owner 南通山浦润滑油科技有限公司
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