A kind of method of polymer modified lubricating oil

A polymer and lubricating oil technology, applied in the field of lubricating oil, can solve the problems of inability to increase viscosity, high viscosity, and affect the viscosity-temperature characteristics of lubricating oil, and achieve the improvement of fluidity, high viscosity, and excellent viscosity-temperature characteristics. Effect

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the prior art solid lubricating oil viscosity index modifier can not improve the fluidity of the obtained modified lubricating oil at ultra-low temperature when the modification treatment of lubricating oil base oil is carried out, and cannot provide High viscosity, which affects the viscosity-temperature characteristics of lubricating oil, directly fills the polymer solution obtained after polymerization into lubricating oil base oil to provide a new method of polymer modified lubricating oil
However, the inventors of the present invention have found that the modified lubricating oil base oil obtained by the method of the prior art cannot improve the fluidity at ultra-low temperature, and cannot provide high viscosity increasing at high temperature, thus affecting the lubricating oil Viscosity-temperature characteristics of

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  • A kind of method of polymer modified lubricating oil
  • A kind of method of polymer modified lubricating oil
  • A kind of method of polymer modified lubricating oil

Examples

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specific Embodiment approach 1

[0038] Specific embodiment 1: the polymer is a hydrogenated styrene-butadiene block polymer, and the method for preparing a hydrogenated styrene-butadiene block polymer solution comprises: mixing styrene monomer and butadiene monomer Polymerization is carried out under solution polymerization conditions, and then the prepared styrene-butadiene block polymer solution is subjected to hydrogenation reaction to prepare a hydrogenated styrene-butadiene block polymer solution. The catalyst for the polymerization reaction is preferably a lithium catalyst, the temperature of the polymerization reaction is 35-110° C., the pressure of the polymerization reaction is 0.15-0.8 MPa, and the total reaction time of the materials in the polymerization reactor is 60-180 minutes. And the catalyst of the hydrogenation reaction is preferably a nickel-based catalyst, the temperature of the hydrogenation reaction is 40-80°C, the pressure of the hydrogenation reaction is 2.0-6.0MPa, and the total reac...

specific Embodiment approach 2

[0040] Specific embodiment 2: the polymer is a hydrogenated styrene-isoprene block polymer, and the method for preparing a hydrogenated styrene-isoprene block polymer solution includes: mixing styrene monomer and isoprene Carry out polymerization reaction of alkene monomer under solution polymerization reaction conditions, then carry out hydrogenation reaction to the prepared styrene-isoprene block polymer solution, obtain hydrogenated styrene-isoprene block polymer solution . The catalyst for the polymerization reaction is preferably a lithium-based anion catalyst, the temperature of the polymerization reaction is 50-90° C., the pressure of the polymerization reaction is 0.15-0.7 MPa, and the total reaction time of the materials in the polymerization reactor is 50-150 minutes. And the catalyst of the hydrogenation reaction is preferably a nickel-based catalyst, the temperature of the hydrogenation reaction is 50-70°C, the pressure of the hydrogenation reaction is 3.0-5.0MPa, ...

Embodiment 1

[0056] The polymerization conditions used in this example are: the weight ratio of ethylene monomer, propylene monomer and n-hexane is 1:4:16; the vanadium-based Ziegler-Natta catalyst is used, and the temperature of the first polymerization reactor is 35°C, pressure 0.8MPa, average residence time 15min; temperature of the second polymerization reactor 48°C, pressure 1.0MPa, average residence time 15min. The binary ethylene-propylene rubber glue solution (the number-average molecular weight of this binary ethylene-propylene rubber is 105,000, the molecular weight distribution coefficient is 1.8, the content of propylene structural unit is 49% by weight, the Mooney viscosity of finally obtaining concentration is 7% by weight, Mooney viscosity is 47), and the production capacity of pure binary ethylene propylene rubber is 20kg / h, and the obtained binary ethylene propylene rubber glue is introduced into a lubricating oil blending tank with stirring at a flow rate of 285kg / h, and t...

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Abstract

The invention relates to the field of lubricating oil, and discloses a method of using polymer to modify a lubricating oil. The method comprises a step of directly mixing a polymer solution obtained after polymerization reactions with a lubricating oil basic oil, wherein the polymer is at least one of ethylene propylene rubber, hydrogenated styrene-butadiene block polymer, and hydrogenated styrene-isoprene block polymer. According to a conventional method, a solid lubricating oil viscosity index modifier is used to modify a lubricating oil basic oil, the flowing performance of the modified lubricating oil at a super low temperature is not improved, the viscosity of the modified lubricating oil is not high enough at a high temperature, and the viscosity-temperature defect of the lubricatingoil is not overcome. The provided method overcomes the abovementioned problems. The obtained modified lubricating oil product has excellent viscosity-temperature characteristics.

Description

technical field [0001] The invention relates to the field of lubricating oil, in particular to a method for polymer modified lubricating oil. Background technique [0002] The viscosity index of lubricating oil is a conventional quantitative value that expresses the change of oil viscosity with temperature. The higher the viscosity index of lubricating oil, the smaller the change of its viscosity with temperature, so that the lubricating oil can meet the requirements of not being thin at high temperature and not thick at low temperature. However, the viscosity of the lubricating oil base oil itself cannot meet this requirement at all. Therefore, it is necessary to add a viscosity index modifier (viscosifier) ​​to the lubricating oil base oil to increase the viscosity index of the lubricating oil to improve the viscosity temperature of the lubricating oil. performance. [0003] Viscosity index modifiers are composed of some linear polymer organic compounds with shear resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M143/12C10M143/10C10M143/02C10M143/04C08F210/16C08F297/04C08F8/04C10N30/02C10N20/02
Inventor 张国娟徐林王晨静赵英
Owner CHINA PETROLEUM & CHEM CORP
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