Lubricating grease used for automobile hub bearing and preparation method thereof

A technology for automobile wheels and lubricating grease, which is applied in lubricating compositions and the petroleum industry, etc., can solve the problems of short service life of lubricating grease, and achieve the effects of long service life, scientific and reasonable formula, and good shear resistance

Active Publication Date: 2012-04-04
WUXI FEITIAN GREASE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves on existing methods used during manufacturing processes such as lithium diphenyl sulfonate (LDS), but it also includes several technical improvements like better heat dissipating ability, longer lasting oil film formation due to improved surface roughness or reduced wear caused by contact between different parts inside them. Additionally, this new method can protect against damage from external factors while still providing effective lubricant when needed. Overall, these advancements improve the durability and lifespan of vehicle wheels' bearings without compromising their effectiveness.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the quality of lubricant oil used in heavy duty trucks and highway cars without compromising their ability to resist rusting under severe conditions such as those caused by rainwater during winter months when they are parked at sea level.

Method used

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  • Lubricating grease used for automobile hub bearing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix 80Kg of lauryl hydroxy fatty acid, 20Kg of stearic acid, and 400Kg of base oil, heat to 90°C and melt, add 8Kg of calcium hydroxide aqueous solution (calcium hydroxide 6.17Kg, water 1.83Kg) and 40Kg of lithium hydroxide aqueous solution (lithium hydroxide 28.3Kg, water 11.7Kg), saponification at 105°C for 2 hours, at 155°C, add 50Kg of sebacic acid, continue to react for two hours, after adding 450Kg of oil, raise the temperature to the highest temperature of 215°C, transfer to the blending tank, cool and reflux , at 150°C, 18MPa high-pressure homogenization, add 20Kg of sulfurized isobutylene, 10Kg of tricresyl phosphate, 40Kg of ethylene-propylene copolymer, and 12Kg of diphenylamine at below 100°C, mix well, test, and pack after passing the test.

Embodiment 2

[0035] Mix 70Kg of lauryl hydroxy fatty acid, 30Kg of stearic acid, and 450Kg of base oil, heat to 88°C to melt, add 14.5Kg of lithium hydroxide, saponify for 2 hours at 99-110°C, and add sebacic acid at 140°C 22Kg, add 9.3Kg of lithium hydroxide, react for two hours, continue to add 26.3Kg of azelaic acid, add 11.9Kg of lithium hydroxide, react for two hours, after adding 350Kg of residual oil, heat up to the highest temperature between 180 and 230°C, transfer To the blending kettle, cool and reflux, homogenize at 100-150°C, 15-25MPa high pressure, add borate 30Kg, molybdenum dibutyldithiocarbamate 10Kg, polyisobutylene 80Kg, phenyl α-naphthylamine below 100°C 12Kg, mixed evenly, inspected, and packaged after passing the test.

Embodiment 3

[0037] Mix 85Kg lauryl hydroxy fatty acid, 15Kg stearic acid, 35Kg sebacic acid, 10Kg boric acid, 540KG base oil, heat to 95°C and melt, add lithium hydroxide 33.5Kg, saponify at 108°C for 2 hours, and add more than 280KG After oiling, heat up to a maximum temperature of 220°C, transfer to a blending kettle, cool and reflux, homogenize at 120°C, 20MPa high pressure, add 15Kg of sulfurized isobutylene, 30Kg of sulfurized olefin cottonseed oil, 140Kg of polymethacrylate, 5Kg of diphenylamine and 8Kg of phenyl α-naphthylamine, mixed evenly, tested and packaged after passing the test.

[0038] The present invention produces through three kinds of examples the automobile hub bearing lubricating grease, its physicochemical index is as follows:

[0039]

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Abstract

The invention discloses lubricating grease used for an automobile hub bearing and a preparation method thereof. The lubricating grease used for an automobile hub bearing comprises the following components by weight: 70-90% of base oil; 5-20% of a soap thickener; 1-5% of an extreme pressure antiwear agent; and 5-15% of a polymer composed of one or several of an ethylene-propylene copolymer, polymethacrylate, and polyisobutylene; and 1-3% of an antioxidant. With a scientific formula and simple preparation technology, the lubricating grease of the invention overcomes many disadvantages existing in prior art, and realizes the advantages of excellent high temperature performance, extreme pressure performance, adhesion performance, shearing resistance and water resistance. The lubricating grease provided in the invention is suitable for lubricating automobile hub bearings, especially suitable for long time lubrication of high temperature, high speed and high load heavy truck and coach hub bearings.

Description

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Claims

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Application Information

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Owner WUXI FEITIAN GREASE
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