Lubricating grease composition

A technology of lubricating grease composition and compound, which is applied in the direction of lubricating composition, petroleum industry, thickener, etc. It can solve the problems of poor high temperature resistance, etc., and achieve the effects of reducing production cost, good oxidation stability, and lightening load

Active Publication Date: 2010-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor high temperature resistance of the prior art grease composition, to provide a grease composition with good high temperature resistance

Method used

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  • Lubricating grease composition

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preparation example Construction

[0017] The preparation method of the lubricating grease composition provided by the invention can be obtained by mixing and uniformly grinding barium complex base grease, lithium complex base grease, sulfur phosphorus additive, and thiadiazolyl compound. Wherein, said compound barium base grease contains compound barium soap and base oil, the preparation method of this compound barium base grease comprises: in the presence of base oil, acid and barium hydroxide are contacted at 60-99 ℃ and dehydration reaction is carried out, and After the reaction, the temperature of the product obtained is raised to 150-220° C., then the heating is stopped, and the grinding is uniform. The lithium complex base grease contains lithium complex and base oil. The preparation method of the lithium complex base grease includes: in the presence of base oil, contacting acid and lithium hydroxide at 60-99°C for dehydration reaction, raising the temperature of the product obtained after the reaction t...

preparation example 1

[0025] Preparation Example 1 is used to illustrate the preparation of composite barium base grease.

[0026] 150g of 12-hydroxystearic acid, 80g of adipic acid and 770g of PAO with a viscosity of 4.0 centistokes were added to a 2.0 liter kettle, stirred and heated to 80°C, and 203.5g of barium hydroxide octahydrate was added, Continue to heat and stir at 100°C for 30 minutes. At this time, the water generated by the reaction and the added water are basically evaporated, and then start to heat up. When the temperature rises to 165°C, stop heating and stirring, and put the reactant on a three-roller mill. Grind three times to obtain the compound barium base fat for future use. In the compound barium base grease, the content of the compound barium soap is 29.22% by weight.

preparation example 2

[0028] Preparation Example 2 is used to illustrate the preparation of lithium complex base grease.

[0029] Add 100g of 12-hydroxystearic acid, 34g of sebacic acid and 466g of PAO with a viscosity of 6.0 centistokes into a 2.0 liter kettle, stir and heat to 95°C, slowly add 28.8g of hydrogen monohydrate The solution made of lithium oxide and 300g water, continue to heat and stir for 30 minutes, when the reaction has been completed, continue to heat and stir to 120°C, keep at 120-130°C for 30 minutes, then continue to heat and stir to 200-210°C , stop heating, add 400g of di-isooctyl sebacate, continue to stir and cool to 120°C, and grind the product three times on a three-roller mill to obtain a lithium complex base grease for future use. In the lithium complex base grease, the content of the lithium complex soap is 13.4% by weight.

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Abstract

The invention provides a lubricating grease composition. The lubricating grease composition comprises a base oil, a thickening agent and an additive, wherein the thickening agent comprises a compound barium soap and a compound lithium soap; the additive comprises a sulfur-phosphorous additive and a thiodiazolyl compound; and based on the total weight of the lubricating grease composition, the content of the barium compound soap is 1.5 to 7.5 weight percent, the content of the lithium compound soap is 5 to 15 weight percent, the content of the sulfur-phosphorous additive is 0.1 to 5 weight percent, the content of the thiodiazolyl compound is 0.1 to 3 weight percent and the content of the base oil is 70 to 93.3 weight percent. Under a condition of low compound barium content, the lubricating grease composition of the invention has high oxidation stability, high temperature resistance and high extreme-pressure abrasion resistance, so the lubricating grease composite can be used as lubricating grease for high-speed bearings.

Description

technical field [0001] The present invention relates to a grease composition. Background technique [0002] Bearings are important rotating parts in mechanical equipment. With the continuous expansion of bearing applications, energy saving, light weight, long life, wide temperature range, high speed, and low noise will be important directions for the development of bearing technology. In order to reduce the wear of the bearing, it is usually necessary to apply grease to the bearing. [0003] In order to make the grease maintain long-term stable lubricating performance in high-speed bearings, Japanese patent application JP2000-328083 discloses a grease composition, which contains barium soap or complex barium soap and lithium soap or complex The mixture of lithium is used as a thickening agent, wherein the total content of barium soap and complex barium soap in the thickening agent is 20-97% by weight, and it is disclosed that the thickening agent accounts for 15.6-31.3% by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M115/00C10M127/02
Inventor 刘中其杨玲莎姜靓孙洪伟段庆华
Owner CHINA PETROLEUM & CHEM CORP
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