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Polyurea lubricating grease composition

A polyurea lubricating grease and composition technology, applied in the field of lubricating grease, can solve the problems that are not related to the change of high-temperature cone penetration value of polyurea lubricating grease, that is, high-temperature hardening, etc., and achieve the effect of excellent high temperature resistance and long lubrication life

Inactive Publication Date: 2011-04-06
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above existing publications all relate to polyurea grease, but none of them involve the change of high-temperature cone penetration value of polyurea grease, that is, the problem of high-temperature hardening

Method used

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  • Polyurea lubricating grease composition
  • Polyurea lubricating grease composition
  • Polyurea lubricating grease composition

Examples

Experimental program
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Effect test

example

[0033] Typical examples are as follows:

[0034] Put 500 grams of base oil in container A and add all the monoamines, heat up to 60-80°C, put 500 grams of base oil and all the diisocyanate in container B, and heat up to 60-80°C. Then pour the contents of container A into container B and stir the reaction. After the reaction is completed, the temperature of the material is raised to 140-150°C, then cooled down, the additive is added, and the lubricating grease is made after being ground by a three-roller machine. The weight of the diurea thickener formed by the reaction of the monoamine and the diisocyanate accounts for 5-30% of the total weight of the lubricating grease composition. Examples and test results are shown in Table 2, and the material proportions in the table are molar ratios.

[0035] Table 2: Typical Examples

[0036]

[0037]

[0038] Table 2 (continued)

[0039]

[0040] The comparison of the data in Table 2 shows that the combination of aromatic a...

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Abstract

The invention relates to a polyurea lubricating grease composition. The lubricating grease composition contains 72 to 95 weight percent of base oil and 5 to 28 weight percent, preferably 7 to 20 weight percent of diurea thickening agent; and the diurea thickening agent is prepared by reaction of monoamine and diisocyanate, the monoamine is a mixture of fatty amine and aromatic amine, and the molar ratio of the fatty amine to the aromatic amine is 5:1-1:5. The lubricating grease composition is polyurea lubricating grease, and has excellent high temperature resistance; and the lubricating grease composition has the characteristics that: the penetration value of the composition after being baked at a high temperature for long time is changed little compared with the composition baked at room temperature, namely the consistency of the composition is changed little, and the composition does not obviously become hard to affect the lubricating effect or become soft to cause high-temperature loss. The room-temperature and high-temperature penetration changes of the lubricating grease composition and the common high-temperature lubricating grease are shown as a table 1, and the constant temperature time of the lubricating grease composition at the high temperature is 24 hours.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a polyurea lubricating grease composition. Background technique [0002] At present, lubricating grease is produced by thickening base oil with thickener to make lubricating grease. Polyurea grease is generally prepared by reacting amine and isocyanate in base oil and homogenizing. Different from soap-based grease, polyurea grease does not contain metal ions, and there is no catalytic oxidation of metal ions on grease at high temperature. At the same time, polyurea thickener itself has a certain anti-oxidation effect. Compared with polyurea grease, polyurea grease has a longer lubrication life, which makes polyurea grease very suitable for lubrication under high temperature conditions. However, the current polyurea grease has the problem that the cone penetration becomes hard at high temperature. When it is applied to bearing lubrication, the high temperature hardening...

Claims

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Application Information

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IPC IPC(8): C10M115/08C10N50/10C10N30/08C10N40/02
Inventor 冯强张兰英刘庆廉吴宝杰高艳青
Owner CHINA PETROLEUM & CHEM CORP
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