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A kind of preparation method of viscosity index improver with high shear resistance performance

A technology of viscosity index and improver, applied in the field of lubricating oil, can solve problems such as restricting the application range and development prospect of viscosity index improver, poor product shear stability, and difference in product inherent quality, etc., to expand the scope of application and development prospect, Improved shear resistance, mild conditions

Active Publication Date: 2014-10-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic additive factories mainly use the degradation process to produce various OCP viscosity index improvers. The related process is relatively mature, but the degree of degradation is difficult to control. It is necessary to add base oil for secondary adjustment after the reaction is completed, which will inevitably cause Due to the difference in internal quality of different batches of products, the product quality is not easy to control, and the shear stability of the product is relatively poor. The shear index (SSI) between diesel nozzles is above 20, and it is mostly used in medium and low-grade internal combustion engine oil products
To a large extent, it restricts the application scope and development prospect of this kind of viscosity index improver

Method used

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  • A kind of preparation method of viscosity index improver with high shear resistance performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 86g of base oil into a 200ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 0.05g of octadecylamine, raise the temperature to 50°C, and then add 14g of ethylene propylene cut into small pieces glue. Stir, heat up to 130°C, react for 4 hours, continue to heat up to 160°C, feed air, flow rate 100ml / min, react for 2 hours. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard. Its thickening capacity is 3.3mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 0.

Embodiment 2

[0025] Add 127g of base oil into a 250ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 1g of octadecylamine, raise the temperature to 45°C, and then add 22g of ethylene-propylene rubber cut into small pieces . Air was introduced at a flow rate of 200ml / min, stirred, and the temperature was raised to 130°C, and the reaction time was 8 hours. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard. Its thickening capacity is 3.6mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 2.7.

Embodiment 3

[0027] Add 127g of base oil into a 250ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 1g of octadecylamine, raise the temperature to 40°C, and then add 22g of ethylene-propylene rubber cut into small pieces . Stir, heat up to 130°C, react for 4 hours, continue to heat up to 160°C, feed air, flow rate 200ml / min, react for 4 hours. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard. Its thickening capacity is 5.4mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 16.1.

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Abstract

The invention discloses a preparation method of a viscosity index improver with high shear resistance for lubricating oil. The method mainly conducts exploratory research on production technologies of an ethylene-propylene copolymer viscosity index improver, makes use of an accelerator, combines an integrated process of mechanical degradation, thermal degradation and oxidation degradation, effectively controls the product quality, and fully enhances the shear resistance of the product. The product comprises, by mass: 10-20% of the ethylene-propylene copolymer, 0.01-8% of the accelerator, and the balance base oil. The product has a thickening ability of 3.0-8.0mm<2>.s<-1>, a diesel nozzle shear stability index SSI (100DEG C) of 0-20. And the product can be widely used in high-grade internal combustion engine oil, hydraulic oil, and gear oil products. The technology disclosed in the invention has the advantages of simple operation, mild condition, and environmental friendliness.

Description

(1) Technical field [0001] The invention relates to a preparation method of a viscosity index improver with high shear resistance. This product can be widely used in high-grade internal combustion engine oil, hydraulic oil and gear oil products, and belongs to the field of lubricating oil. (2) Background technology [0002] The development of the automobile industry has put forward higher and higher requirements for automotive lubricants. In order to meet the harsh operating conditions such as high speed, high load, and low temperature, higher and higher requirements are put forward for basic research on the performance of various additives added to lubricating oil, additive evaluation methods, and the performance of additive products. With the continuous updating of engines and the requirement of saving resources, internal combustion engine oils are rapidly developing towards high-grade and multi-grade oils. In the development of multi-grade oil, in order to meet the high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M159/12C10N40/25C10N30/02C10N40/08C10N40/04
Inventor 管飞瞿庆范姚文钊
Owner PETROCHINA CO LTD