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Oil-water bentonite polyurea composite lubricating grease composition and preparation method thereof

A grease composition, a technology of bentonite grease, applied in the field of grease, can solve the problems of low consistency, service temperature, poor lubricity, etc.

Active Publication Date: 2021-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with oil-soluble grease, the consistency is low, and the adhesion and lubricity need to be further improved
Although the performance of the oil-water type bentonite grease prepared by adding a certain amount of base oil to the water-based grease has been improved, it is still poor in terms of operating temperature and lubricity.

Method used

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  • Oil-water bentonite polyurea composite lubricating grease composition and preparation method thereof
  • Oil-water bentonite polyurea composite lubricating grease composition and preparation method thereof
  • Oil-water bentonite polyurea composite lubricating grease composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example ---

[0105] Preparation example---Preparation of polyurea grease

[0106] 400g PAO4 lubricating base oil (100 ℃ kinematic viscosity is 4mm 2 / s) Stir and heat up to 52-55°C, add 33g of octadecylamine and 12g of cyclohexylamine during this period, stir for 30min, add 34g of diphenylmethane diisocyanate at 70-80°C for 30min, continue to heat up to 205°C Stop heating, keep warm for 15 minutes, pour 150g of PAO4, after cooling down to 130°C, add 4g of extreme pressure anti-wear agent and 1g of rust inhibitor, stir for 30 minutes, grind and homogenize to obtain polyurea grease.

Embodiment 1

[0108] Add 4g of polyethylene glycol 2000 into 36g of water, keep the temperature at 20°C, stir thoroughly, and dissolve completely to obtain a mixed solution. Then 27g of organic amine-modified montmorillonite was added into the mixture, and stirred for 15 minutes. Then slowly add 3g of propylene carbonate in a trickle, fully stir for 30min, then add 30g of PAO4 lubricating base oil (the kinematic viscosity at 100°C is 4mm 2 / s), continue to heat up to 60°C, stir for 15 minutes, add 400g of polyurea grease after stirring evenly, grind and homogenize, and obtain oil-water type bentonite-polyurea composite grease. The physical and chemical properties of the obtained fat are shown in Table 1.

[0109] The dosage percentage of each component for preparing the oil-water type bentonite-polyurea composite grease is: polyethylene glycol: 0.8%; water: 7.2%; PAO 4: 6%; bentonite: 5.4%; propylene carbonate: 0.6%; Polyurea Grease: 80%.

Embodiment 2

[0111] Add 4g of polyethylene glycol 2000 into 36g of water, keep the temperature at 20°C, stir thoroughly, and dissolve completely to obtain a mixed solution. Then add 20 g of organic amine-modified montmorillonite into the mixture, and stir for 15 min. Then slowly add 5g of propylene carbonate in a trickle, fully stir for 30min, then add 35g of PAO4 lubricating base oil (the kinematic viscosity at 100°C is 4mm 2 / s), continue to heat up to 60°C, stir for 15 minutes, add 100 g of polyurea grease after stirring evenly, grind and homogenize, and obtain oil-water type bentonite-polyurea composite grease. The physical and chemical properties of the obtained fat are shown in Table 1.

[0112] The dosage percentage of each component for preparing the oil-water type bentonite-polyurea composite grease is: polyethylene glycol: 2%; water: 18%; PAO 4: 17.5%; bentonite: 10%; propylene carbonate: 2.5%; Polyurea Grease: 50%.

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Abstract

The invention discloses an oil-water bentonite polyurea composite lubricating grease composition and a preparation method thereof. The oil-water bentonite polyurea composite lubricating grease composition is prepared from the following components: water, base oil, a surfactant, organic bentonite, a dispersing aid and polyurea lubricating grease. The oil-water bentonite polyurea composite lubricating grease disclosed by the invention has certain mechanical stability and colloid stability; compared with oil-water type bentonite lubricating grease, the oil-water bentonite polyurea composite lubricating grease has the advantages that the penetration degree and the dropping point performance are further improved, and the oil-water type bentonite lubricating grease has the performance of water-based lubricating grease, so that the oil-water type bentonite lubricating grease has a good application prospect in some special occasions and is particularly suitable for working conditions used at room temperature; moreover, the oil-water bentonite polyurea composite lubricating grease disclosed by the invention is small in base oil consumption, good in cooling effect, easy to clean, low in cost, stable in performance and suitable for the working condition of disposable use at room temperature.

Description

technical field [0001] The present application relates to lubricating grease, in particular to an oil-water type bentonite-polyurea composite lubricating grease composition and a preparation method thereof. Background technique [0002] The environment is the basis for the survival of human beings and other lives. With the continuous improvement of people's environmental awareness and the increasing attention of the international community to the ecological environment, the environmental pollution caused by lubricating grease has attracted more and more attention. Grease has the serious defects of poor biodegradability, high ecotoxicity, and great environmental pollution, and cannot meet the urgent needs of human beings to protect the environment. [0003] In recent years, at home and abroad, attention has been paid to the research of biodegradable grease, and in some special applications, the grease does not require a long service life. Therefore, it is of great significan...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M173/02C10N30/06C10N50/10C10N30/10C10N30/04
Inventor 李朝宇何懿峰刘伟陈靖庄敏阳刘欣阳郑会
Owner CHINA PETROLEUM & CHEM CORP
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