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Excellent carbamido lubricating grease composition with shear stability and preparation method thereof

A technology of urea-based grease and stability, which is applied in the field of urea-based grease composition and its preparation, and can solve the problems of low efficiency and small shearing area.

Active Publication Date: 2012-07-25
杭州得润宝油脂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the purpose of improving shear stability can also be achieved by changing the process, such as increasing the cyclic shearing process, but at present, most cyclic shearing uses static shears, the shearing area is small, and the efficiency is not high
[0006] With the rapid development of modern industrial technology and equipment, the requirements for lubricating materials will become increasingly stringent, especially in the continuous operation of mechanical equipment under high load, low speed, high temperature and contact with water environment, to meet the long life of its lubricant, with excellent The requirements of shear stability, water resistance, oxidation stability, high temperature resistance, etc., so as to improve production efficiency and reduce production costs are the general trend, but the current improvement of shear stability of urea-based grease has gradually failed to meet the requirements The lubrication requirements under such working conditions need to be further improved

Method used

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  • Excellent carbamido lubricating grease composition with shear stability and preparation method thereof
  • Excellent carbamido lubricating grease composition with shear stability and preparation method thereof
  • Excellent carbamido lubricating grease composition with shear stability and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0066] 300kg of HVI mineral oil (the base oil has a kinematic viscosity of 15mm at 100°C) 2 / s) mixed with 110kg of xylylene diisocyanate and heated to 80°C to dissolve, then added more than 200kg of HVI mineral oil to cool the mixture to 80°C, then added 34kg of toluene diisocyanate, stirred for 8 minutes, then added 86kg of aniline and 52kg of octane A mixture of amine and 200kg of HVI mineral oil, stirred and reacted, when the temperature of the reaction no longer rises, continue to heat up, raise the temperature to 165°C and keep it for 60min, then transfer to the cooling kettle, when the temperature is lowered to 90°C, add 30kg of Span 80, stir 10min, then carry out circular filtration and shearing; shear for 4h, cool down to 70°C and add 30kg borate oil, 5kg diphenylamine antioxidant, 10kg butyl octyl zinc dithiophosphate, 10kg sulfur-containing extreme pressure anti-wear Additives and 20kg of sulfonate antirust agent, after circulating and stirring for 45 minutes, are p...

Embodiment 2

[0068] Mix 200kg PAO16 and 110kg xylylene diisocyanate and heat to 80-100°C to dissolve, then add 160kg PAO16 to cool the mixture to 80°C, then add 34kg toluene diisocyanate, stir for 5 minutes, then add 86kg aniline and 52kg octylamine Mixture with 180kg PAO16, stirred and reacted, when the temperature of the reaction no longer rises, continue to heat up to 160°C for 30 minutes, then add 60kg of polyol ester, then transfer to the cooling tank, when the temperature drops to 90°C, add 20kg Span 80 and 8kg Tween 60, stirred for 20min, then cyclically filtered and sheared; sheared for 2h, cooled to 80°C and added 27kg borate oil, 4.5kg diphenylamine antioxidant, 9kg butyl octyl disulfide Substitute zinc phosphate, 9kg sulfur-containing extreme pressure anti-wear additive and 18kg sulfonate antirust agent, after circulating and stirring for 60min, exit the kettle through the homogeneous pump, the pressure of the homogeneous pump is controlled at 25MPa, and degas through the degassi...

Embodiment 3

[0070] 200kg of synthetic oil (the base oil has a kinematic viscosity of 10mm at 100°C) 2 / s) mixed with 50kg cyclohexane diisocyanate and heated to 80°C to dissolve, then added 200kg HVI mineral oil to cool the mixture to 80°C, then added 50kg toluene diisocyanate, stirred for 5-10min, then added 54.41kg aniline and 87.61kg The mixture of octylamine and 200kg HVI mineral oil was stirred and reacted. When the temperature of the reaction no longer rose, the heating was continued until the temperature was raised to 170°C for 30 minutes, and then transferred to the cooling kettle. When the temperature was lowered to 95°C, 40kg of Span 80 was added. Stir for 20 minutes, then carry out circular filtration and shearing; shear for 2 hours, cool down to 80°C and add 10kg of borate oil, 10kg of diphenylamine antioxidant, 40kg of butyl octyl zinc dithiophosphate, 20kg of sulfur-containing extreme pressure resistance Grinding additives and 40kg sulfonate antirust agent, after circulating...

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Abstract

The invention discloses an excellent carbamido lubricating grease composition with shear stability and a preparation method of the carbamido lubricating grease composition. The carbamido lubricating grease provided by the invention comprises: (a) base oil, (b) a carbamido thickening agent, and (c) a surfactant, wherein the carbamido thickening agent is generated by a reaction of two or more kinds of diisocyanates, mono-aromatic amine and fatty amine; and borate oil, an extreme pressure antiwear agent containing sulfur, an antioxidant, an antirusting agent and the like are added to improve various performances of the carbamido lubricating grease. The carbamido lubricating grease prepared by the preparation method provided by the invention has good mechanical stability, water-resistance, heat resistance, extreme pressure abrasion resistance, pumping performance and the like, can be applied to the lubrication and the protection of a turret, a crystallizer, a segment roller bed, a withdrawal and straightening unit, a pendulum shear and a conveying roller of metallurgy continuous casting equipment, and is also applied to the lubrication of a tandem mill, bearings of friction parts of high-temperature heavy-duty equipment and the like.

Description

technical field [0001] The invention relates to a urea-based grease composition and a preparation method thereof, in particular to a urea-based grease composition with excellent shear stability and a preparation method thereof. Background technique [0002] Since Swaken et al. discovered polyurea grease in 1954 when investigating the properties of silicone oil, urea-based grease has been rapidly developed and widely used because of its excellent properties. For example, because urea-based grease does not contain metal ions, it has no catalytic oxidation effect on base oil during use, so it has good high temperature resistance, oxidation resistance, long bearing life, good water resistance and acid medium resistance, etc. In general, the hydrocarbon groups in urea-based thickeners contain aromatic groups, which also make urea-based greases have good radiation resistance and colloidal stability. In addition, studies have also found that because urea-based grease thickeners con...

Claims

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Application Information

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IPC IPC(8): C10M115/08C10M169/06
Inventor 白传航李元正
Owner 杭州得润宝油脂股份有限公司
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