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High-temperature polyurea lubricating grease composition and preparation method thereof

A kind of grease composition, the technology of the composition, applied in the field of grease

Inactive Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It better solves the lubrication needs of high temperature parts in metallurgy, mining, textile, food, printing and dyeing and papermaking industries

Method used

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  • High-temperature polyurea lubricating grease composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 400g of PAO40 and 1200g of HVI650 base oil into the reaction kettle, add 50g of diphenylmethane diisocyanate, and raise the temperature. The temperature in the kettle is raised to 80°C, add 16g of aniline, 16g of cyclohexylamine, and 20g of octadecylamine, keep the temperature at 100°C and stir for 60 minutes at a constant temperature; ℃, add 200g of HVI650 base oil into the reaction kettle for cooling, the cooling temperature is controlled at 150-170 ℃, the temperature is naturally lowered, and the consistency is adjusted; T706: 1g, T531: 2g, stirred at constant temperature for 30 minutes, oiled three times in a three-roll mill, and then packed in cans.

Embodiment 2

[0037] Add 1200g of PAO40 and 500g of HVI650 base oil into the reaction kettle, add 137g of diphenylmethane diisocyanate, and raise the temperature. The temperature in the kettle rises to 60°C, add 21g of aniline and 81g of cyclohexylamine, and keep the temperature at 100°C for constant temperature reaction for 60 minutes; after the reaction is completed, add 50g of aluminum isopropoxide, raise the temperature, the maximum temperature is 180°C, cool down naturally, and adjust the consistency; If appropriate, cool down to 60-90°C and add T705: 20g, Siben-80: 20g, T706: 20g, T531: 40g, stir at a constant temperature for 30min, press oil three times with a three-roller machine, and then pack in cans.

Embodiment 3

[0039] Add 900g of 150BS and 950g of PAO100 base oil into the reaction kettle, add 200g of diphenylmethane diisocyanate, and raise the temperature. The temperature in the kettle is raised to 80°C, add 215g of octadecylamine and 80g of dodecanediamine, keep the temperature at 100°C and stir for 60 minutes; after the reaction is completed, add 100g of pentaerythritol and raise the temperature until the maximum temperature reaches 190°C, then cool down naturally and adjust the consistency If the consistency is right, cool down to 60-90°C and add T705: 10g, Benzene-80: 2g, T706: 0.4g, antioxidant T531: 80g, stir at constant temperature for 30min, and then pack in cans after three times of three-roller oil pressing.

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Abstract

The invention relates to a high-temperature polyurea lubricating grease composition and a preparation method thereof. The high-temperature polyurea lubricating grease composition comprises 5-20% of thickener, 80-95% of base oil, 0.05-3.5% of anticorrosive agent, 0.5-10% of rust inhibitor, 0.05-5% of high-temperature improver and 0.1-4% of antioxidant. The preparation method comprises the following steps: adding part of base oil into a reaction kettle, adding diisocyanate, heating to 40-90 DEG C, adding mixed amine, and carrying out thermostatic reaction at 100-140 DEG C for 30-100 minutes; after the reaction finishes, adding a structure improver, heating to 160-195 DEG C, cooling to 120-170 DEG C with base oil in the reaction kettle, naturally cooling, and adjusting to a proper thickness; and cooling to 60-90 DEG C, and adding the additive components. The high-temperature polyurea lubricating grease provided by the invention does not soften or has low softening tendency at 100-120 DEG C, and has greatly improved hardenability at the high temperature of 180 DEG C.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a high-temperature polyurea lubricating grease composition and a preparation method. Background technique [0002] Since the application of polyurea compounds as grease thickeners in the 1950s, they have been widely used for their outstanding high temperature resistance, water resistance and long bearing life. Theoretically speaking, polyurea grease has high dropping point, excellent oxidation stability, long bearing life and good shear stability, which is very suitable for high-grade motor bearings, automotive hub bearings, automotive CVJ and steel enterprises Continuous casting machine bearings and other high temperature, high shear and long life conditions. [0003] Polyurea grease has a high dropping point (>260°C), so it is often used in high temperature conditions. During the long-term field use, polyurea grease also showed some problems. For example, the sof...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10N50/10C10N30/10C10N30/12
Inventor 谷校英董禄虎栗志彬吴宝杰高艳青
Owner CHINA PETROLEUM & CHEM CORP
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