Compound lithium base grease composite and preparation method thereof

A technology of base lubricating grease and composition, which is applied in the field of composite lithium-based lubricating grease composition and its preparation, to achieve good colloidal stability, good high temperature performance and extreme pressure resistance

Active Publication Date: 2010-09-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of research is to add organometallic salt compounds to enhance the extreme pressure performance of lithium composite grease, but there is no application of micron-sized bismuth oxide powder particles with controllable particle size in lithium composite grease to enhance its extreme pressure performance. press performance report

Method used

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  • Compound lithium base grease composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 57 grams of 12-hydroxystearic acid and 587 grams of base oil into the reactor, wherein the base oil is mineral oil, heat and stir, add lithium hydroxide hot solution for saponification. Raise the system temperature to 150°C, then raise the temperature to 210°C, then lower the system temperature to 100°C, add 21 grams of sebacic acid, and add lithium hydroxide hot solution. The temperature of the system was raised to 150°C. Turn off the heat and add 3 g d 50 = Bismuth oxide powder particles of 20 microns, keep stirring, and wait for the system to cool naturally to room temperature to obtain the product

Embodiment 2

[0023] Add 14 grams of 12-hydroxystearic acid and 178 grams of base oil into the reactor, wherein the base oil is mineral oil, heat and stir, add lithium hydroxide hot solution for saponification. Raise the system temperature to 150°C, then raise the temperature to 220°C, then lower the system temperature to 110°C, add 6 grams of sebacic acid, and add lithium hydroxide hot solution. The temperature of the system was raised to 150°C. Turn off the heat and add 1 g d 50 =10 micron bismuth oxide powder particles and 1 gram of diisooctyldiphenylamine, keep stirring, and wait for the system to cool naturally to room temperature to obtain the product.

Embodiment 3

[0025] Add 36 grams of 12-hydroxystearic acid and 140 grams of base oil into the reactor, wherein the base oil is a mixture of naphthenic base oil and paraffin base oil, heat and stir, add lithium hydroxide hot solution for saponification. Raise the system temperature to 150°C, then raise the temperature to 215°C, then lower the system temperature to 105°C, add 14 grams of sebacic acid, and add lithium hydroxide hot solution. The temperature of the system was raised to 150°C. Turn off the heat and add 8 g d 50 = 10 micron bismuth oxide powder particles and 1 gram of diisooctyl diphenylamine and 1 gram of Sudan III, keep stirring, and wait for the system to cool naturally to room temperature to obtain the product.

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Abstract

The invention discloses a compound lithium base grease composite, which comprises the following materials in percentage by weight: 70-89% of grease base oil, 10-25% of densifier, 0.02-2% of additive, and 0.01-5% of bismuth oxide. In the compound lithium base grease composite, micron-level bismuth oxide powder is added as an extreme-pressure additive, and the prepared compound lithium base grease composite has good colloidal stability and mechanical stability, and better high temperature performance and extreme pressure resisting performance.

Description

technical field [0001] The invention relates to a composite lithium-based lubricating grease composition and a preparation method thereof. Background technique [0002] Grease is used in a wide range, and different mechanical equipment has different requirements for the performance of grease. Grease performance is a comprehensive reflection of grease composition and its preparation process. Grease coated between metal surfaces that are in contact with each other, the grease film formed during work must bear axial and radial loads, and the load-bearing characteristics of the grease film are called extreme pressure properties of grease . Generally speaking, greases used under harsh conditions are often added with extreme pressure agents to enhance their extreme pressure properties. [0003] Lithium complex grease is made of fatty acid lithium soap and low molecular weight lithium salt (such as azelaic acid, sebacic acid, salicylic acid and borate, etc.) two or more compound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M125/10C10M177/00C10N50/10C10N30/10C10N30/06
Inventor 纪红兵曾晖陈晓南陈哲
Owner SUN YAT SEN UNIV
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