Synthetic low-carbon ultrahigh temperature grease and preparation method

An ultra-high temperature, lubricating grease technology, applied in the direction of lubricating composition, petroleum industry, etc., can solve the problems of unsatisfactory service conditions, low service temperature, metal corrosion, etc., and achieve excellent comprehensive performance, good anti-friction and anti-wear properties , the effect of strong bearing capacity

Active Publication Date: 2019-06-28
SHANDONG KEYSTONE LUBRICANT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These lubricating greases have obvious deficiencies: 1. Molybdenum disulfide lithium base grease has a low drop point and low operating temperature, which can easily cause grease loss during work; Accidents such as shaft jamming or bearing lockup; 3. A large amount of coke smoke is likely to be generated during use, or even catch fire; 4. The maximum service temperature of molybdenum disulfide is 350°C, which cannot meet the ultra-high temperature service conditions; 5. Molybdenum disulfide Will be oxidized at high temperatures, which can be corrosive to metals

Method used

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  • Synthetic low-carbon ultrahigh temperature grease and preparation method
  • Synthetic low-carbon ultrahigh temperature grease and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 of the present invention provides a synthetic low-carbon type ultra-high temperature lubricating grease, the components and weight-to-number ratios of the lubricating grease are:

[0035] 100kg of synthetic urea grease: 85kg for trimellitate, 10kg for polyisobutylene, 5kg for polyurea;

[0036] 12.9kg of functional additives: 0.5kg of high-temperature antioxidant, 0.3kg of anti-copper corrosion additive, 0.1kg of ferrous metal anti-rust and preservative, 2kg of flame-retardant lubricant, 5kg of flame-retardant smoke suppressant, and 5kg of ultra-high temperature solid lubricant;

[0037] In 5kg of polyurea, MDI is 2kg, tallow amine is 2kg, and cyclohexylamine is 1kg.

[0038] The preparation method of the synthetic low-carbon type ultra-high temperature lubricating grease of embodiment 1 is:

[0039] 1) According to the production volume, accurately measure 51-76.5kg of trimellitate and 10kg of polyisobutene into the fat-making kettle, stir and heat up to ...

Embodiment 2

[0048] Embodiment 2 of the present invention provides a synthetic low-carbon type ultra-high temperature lubricating grease, the components and weight-to-number ratios of the lubricating grease are:

[0049] 100kg of synthetic urea grease: 84kg for trimellitate, 10kg for polyisobutylene, 6kg for polyurea;

[0050] 20.4kg of functional additives: 0.8kg of high-temperature antioxidant, 0.3kg of anti-copper corrosion additive, 0.3kg of ferrous metal anti-rust and preservative, 3kg of flame-retardant lubricant, 8kg of flame-retardant smoke suppressant, and 8kg of ultra-high temperature solid lubricant;

[0051] In 6kg of polyurea, MDI is 2.4kg, tallowamine is 2.4kg, and cyclohexylamine is 1.2kg.

[0052] The preparation method of the synthetic low-carbon type ultra-high temperature lubricating grease of embodiment 2 is:

[0053] 1) According to the production volume, accurately measure 50.4-75.6kg of trimellitate and 10kg of polyisobutene into the fat-making kettle, stir and heat u...

Embodiment 3

[0062] Embodiment 3 of the present invention provides a synthetic low-carbon ultra-high temperature lubricating grease, the components and weight-to-number ratios of the lubricating grease are:

[0063] 100kg of synthetic urea grease: 81g of trimellitate, 11.5kg of polyisobutylene, and 7.5kg of polyurea;

[0064] 26.7kg of functional additives: 1kg of high temperature antioxidant, 0.3kg of anti-copper corrosion additive, 0.4kg of ferrous metal antirust and preservative, 5kg of flame retardant lubricant, 10kg of flame retardant and smoke suppressant, and 10kg of ultra-high temperature solid lubricant;

[0065] In 7.5kg of polyurea, MDI is 3kg, tallowamine is 3kg, and cyclohexylamine is 1.5kg.

[0066] The preparation method of the synthetic low-carbon type ultra-high temperature lubricating grease of embodiment 3 is:

[0067] 1) According to the production volume, accurately measure 48.6-72.9kg of trimellitate and 11.5kg of polyisobutylene into the fat-making kettle, stir and ...

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Abstract

A synthetic low-carbon ultrahigh temperature grease and a preparation method comprise trimellitate, polyisobutylene, polyurea, and functional additives; wherein polyurea includes MDI, tallow amine andcyclohexylamine; the functional additives include a high temperature antioxidant, an anti-copper corrosion additive, an anti-rust and anti-corrosion agent for ferrous metals, a flame retardant lubricant, a flame retardant anti-smoke agent, and an ultrahigh temperature solid lubricant. First, synthetic polyurea grease is prepared in a grease-making kettle; then, the temperature of materials in thekettle is raised to 120-130 DEG C until the water in the kettle is completely drained; the temperature of the materials in the kettle is raised to 170+ / -3 DEG C, and the materials are kept at this temperature for about 10 minutes. A cooling system is started; when the temperature of the materials in the kettle drops to 150 DEG C, the functional additives are added in sequence and metering, and the synthetic low-carbon ultrahigh temperature grease is obtained. The synthetic low-carbon ultrahigh temperature grease has the advantages of comprehensive and excellent performance, strong bearing capacity, good properties of anti-wear and anti-friction, good adhesion, strong resistance to high temperature and ultrahigh temperature, low tendency of carbon deposition, long service life and high performance-price ratio.

Description

technical field [0001] The invention relates to a synthetic low-carbon ultra-high temperature lubricating grease and a preparation method thereof, belonging to the technical field of chemical material reaction and combination. Background technique [0002] At present, in metallurgy, iron and steel, petrochemical, chemical and other industries, there are many equipments in high-temperature or ultra-high-temperature working environments. For example, the track bearings in front of the furnace in the iron and steel plant directly face the radiation and baking of high temperature iron (steel) water above 1000 ℃, and the working environment is extremely harsh. [0003] As we all know, the bearings in these working environments generally use lithium molybdenum disulfide grease and calcium sulfonate complex grease added with molybdenum disulfide. These lubricating greases have obvious deficiencies: 1. Molybdenum disulfide lithium base grease has a low dropping point and low operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N50/10C10N30/06C10N30/08C10N40/02
Inventor 李洪强李文婷张立佳李衍翰
Owner SHANDONG KEYSTONE LUBRICANT TECH
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