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Low-noise lubricating grease and preparing method thereof

A grease and low-noise technology, applied in the field of low-noise grease and its preparation, can solve the problem of long time for stable vibration value of grease, uneven dispersion of different thickener components, and poor mechanical stability of grease, etc. problem, to achieve the effect of fast reaction rate, improved anti-oxidation performance, and excellent performance

Active Publication Date: 2017-11-10
辽宁海华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of low-noise grease technology, polyurea low-noise grease has gradually replaced lithium-based grease in the market due to its better high-temperature performance and life. Noise performance will deteriorate after prolonged use
The noise stability of lithium-based grease at high temperature is very good, but it is not resistant to high temperature
[0003] Ordinary mixed grease usually uses more than two kinds of grease products, which are mixed and prepared by three-roller grinding at room temperature. The operating temperature of this "cold mixing" method does not exceed 60°C, which can easily cause different thickening. The dispersion of the agent components is uneven, resulting in a long time for the grease to reach a stable vibration value, poor ability to cover abnormal noise and other problems of unstable noise performance.
Moreover, repeated grinding and other treatment methods will also lead to poor mechanical stability of the grease, complex production process, and inconvenient manipulation, etc.

Method used

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  • Low-noise lubricating grease and preparing method thereof

Examples

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preparation example Construction

[0070] A preparation method of low-noise lubricating grease, comprising three steps of preparing polyurea lubricating grease, preparing lithium-based lubricating grease, and mixing; the specific steps are as follows:

[0071] 1) Preparation of polyurea grease:

[0072] Mix the base oil well, half of the mixed base oil is used to dissolve isocyanate, and the other half is used to dissolve organic amine; after all the base oil is dissolved, remove impurities through high-precision filtration, and slowly introduce it into the saponification kettle for polymerization reaction; before the reaction, add Anti-rust agent; react at 80-100°C for 1-1.5 hours; spare;

[0073] 2) Preparation of lithium-based grease;

[0074] Mix the base oil well, 2 / 3 of the mixed base oil is used to dissolve the polymer acid, and the dissolved solution is filtered through high-precision filtration to remove insoluble matter; heat, add lithium hydroxide when the temperature reaches 80-85°C, and directly h...

Embodiment 1

[0082] A low-noise lubricating grease described in this embodiment is composed of the following components: lithium-based grease: 300kg; polyurea grease: 620kg; polyol ester: 60kg; pentaerythritol succinate: 15kg; Thiocarbamate: 5kg;

[0083] in:

[0084] The composition of lithium-based grease is as follows: paraffin base oil: 91.77kg; polyalphaolefin (PAO): 170.43kg; lauryl hydroxystearic acid: 33kg; lithium hydroxide oily suspension: 4.8kg;

[0085] The composition of polyurea grease is: paraffin base oil: 202.93kg; polyalphaolefin (PAO): 376.87kg; 4.4`-diphenylmethane diisocyanate: 17.4kg; octadecylamine: 9.4kg; cyclohexylamine: 10.3kg; Sorbitan monooleate: 3.1kg;

[0086] In the present embodiment, the preparation method of a kind of low-noise lubricating grease is as follows:

[0087] (1) Preparation of polyurea grease: mix paraffin base oil and polyalphaolefin to make base oil, use 1 / 2 base oil to dissolve 4.4`-diphenylmethane diisocyanate, and the remaining 1 / 2 base...

Embodiment 2

[0091] A low-noise grease described in this embodiment is composed of the following components: lithium-based grease: 400kg; polyurea grease: 550kg; pentaerythritol: 45kg; 2.6-di-tert-butyl mixed phenol: 5kg;

[0092] in:

[0093] The components of lithium-based grease are: paraffin base oil: 177kg; polyalphaolefin (PAO): 177kg; lauryl hydroxystearic acid: 40kg; lithium hydroxide oily suspension: 6kg;

[0094] The components of polyurea grease are: paraffin base oil: 253kg; polyalphaolefin (PAO): 253kg; 4.4`-diphenylmethane diisocyanate: 18.04kg; octadecylamine: 9.74kg; cyclohexylamine: 10.72kg ; Benzotriazole: 5.5kg;

[0095] A kind of low-noise lubricating grease preparation method described in the present embodiment is as follows:

[0096] (1) Preparation of polyurea grease: mix paraffin base oil and polyalphaolefin to make base oil, of which 1 / 2 base oil is used to dissolve 4.4`-diphenylmethane diisocyanate, and the remaining 1 / 2 base oil Used to dissolve octadecylamine...

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Abstract

The invention relates to low-noise lubricating grease and a preparing method thereof. The low-noise lubricating grease is prepared from, by weight, 25-50 parts of lithium base lubricating grease, 50-75 parts of polyurea lubricating grease, 6-10 parts of second dispersant and 0.3-1.0 part of antioxidant; the preparing method comprises the steps of preparation of the polyurea lubricating grease, preparation of the lithium base lubricating grease and mixing. According to the low-noise lubricating grease, a mixture of the lithium soap lubricating grease and the polyurea lubricating grease is used as a raw material, then the second dispersant and the antioxidant are added into the mixture, and the high-temperature mixing technology is adopted to prepare the low-noise lubricating grease with even components; the low-noise lubricating grease has great low-noise performance and can effectively cover up abnormal noise generated by vibration of bearings, and a stable bearing vibration value can be obtained within 1-2 seconds; meanwhile the low-noise lubricating grease has good mechanical stable performance and long lubricating life, and the maximum service temperature can reach 150 DEG C.

Description

technical field [0001] The invention relates to the technical field of lubrication, in particular to a low-noise lubricating grease and a preparation method thereof. Background technique [0002] In recent years, with the development of the bearing industry, the continuous updating of bearing noise standard testing instruments and the continuous improvement of testing methods, people have higher and higher requirements for low-noise grease. With the advancement of low-noise grease technology, polyurea low-noise grease has gradually replaced lithium-based grease in the market due to its better high-temperature performance and life. Noise performance will deteriorate after prolonged use. However, the noise stability of lithium-based grease at high temperature is very good, but it is not resistant to high temperature. [0003] Ordinary mixed grease usually uses more than two kinds of grease products, which are mixed and prepared by three-roller grinding at room temperature. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N50/10C10N40/02
CPCC10M169/04C10M177/00C10M2201/062C10M2205/0206C10M2205/163C10M2207/022C10M2207/026C10M2207/12C10M2207/128C10M2207/283C10M2215/04C10M2215/14C10M2215/223C10M2219/02C10N2030/76C10N2040/02C10N2050/10
Inventor 高宇航王庆日刘虹禹王佳刘鹏李明慧李元鸿
Owner 辽宁海华科技股份有限公司
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