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Viscosity index improver as well as preparation method and application thereof

A viscosity index improvement and integer technology, applied in the field of viscosity index improvers, can solve the problems of reducing ashless dispersants and adding large amounts

Active Publication Date: 2020-04-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As the main component of internal combustion engine oil, the existing viscosity index improver is added in a relatively large amount, generally 5% to 10%. To improve its performance and structure, while reducing the ashless dispersant, it is possible to reduce the low-speed pre-ignition of the engine. problem help

Method used

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  • Viscosity index improver as well as preparation method and application thereof
  • Viscosity index improver as well as preparation method and application thereof
  • Viscosity index improver as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] The preparation of embodiment 1 dispersion type ethylene-propylene copolymer viscosity index improver DOCP-1

[0120] In a 500 ml pressure reactor with temperature control, water cooling and stirring, add 10 grams of ethylene-propylene copolymer (Mw=182000, (0.000055mol) ethylene content 58%, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5 cm 3 Then add 90 grams of 150SN (produced by Sinopec Gaoqiao Petroleum Company), and add 1.137 mg (0.001mol) of tetrakis(pentafluorophenyl)phenylferric chloride porphyrin (M=1136.7) (dissolved in 2 g In acetonitrile), after adding, the temperature was raised to 100°C, and air was introduced to keep the reaction pressure at 0.2MPa. After 6 hours of constant temperature reaction, the oxidation reaction was stopped, and the catalyst was separated by filtration to obtain a mixture of the oxidative degradation product of the copolymer and 150SN. The weight-average molecular weight of the oxidative degradation pro...

Embodiment 2

[0121] Embodiment 2 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP-2

[0122] In a 500 ml pressure reactor with temperature control, water cooling and stirring, add 10 grams of ethylene-propylene copolymer (Mw=182000, ethylene content 58%, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5cm 3 Then add 90 grams of 150SN (produced by Sinopec Gaoqiao Petroleum Company), add 0.7 mg of tetraphenylporphyrin ferric chloride (M=704.02, 0.001mol) (dissolved in 1.5 grams of acetonitrile), and heat up to 110 ℃, feed air, keep the reaction pressure at 0.3 MPa, keep the temperature for 4 hours, stop the oxidation reaction, filter and separate the catalyst, and obtain the mixture of the oxidative degradation product of the copolymer and 150SN, and the weight average molecular weight of the oxidative degradation product is measured as 110600 , the acid value is 0.20mgKOH / g. Add 0.034 g of p-diphenylamine (M=169.22) to the mixture ...

Embodiment 3

[0123] Embodiment 3 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP-3

[0124] In a 500 ml pressure reactor with temperature control, water cooling and stirring, add 10 grams of ethylene-propylene copolymer (Mw=182000, ethylene content 58%, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5cm 3 Then add 90 grams of 150SN (produced by Sinopec Gaoqiao Petroleum Company), and add 1.5 mg (0.0013mol) of tetrakis(pentafluorophenyl)phenylferric chloride porphyrin (M=1136.7) (dissolved in 3 g acetonitrile), heated up to 100°C, and fed air, kept the reaction pressure at 0.4MPa, kept the temperature for 7 hours, stopped the oxidation reaction, filtered and separated the catalyst, and obtained the mixture of the oxidized degradation product of the copolymer and 150SN, and measured the oxidized The weight average molecular weight of the degradation product is 123000, and the acid value is 0.15.mgKOH / g. Add 0.022 g of p-hydroxyani...

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Abstract

The invention provides a viscosity index improver. The structure of the viscosity index improver is shown as a general formula (I) shown in the specification, wherein definitions of all groups are shown in the specification. The viscosity index improver provided by the invention has good cleaning performance, dispersing performance, oxidation resistance and wear resistance, can also reduce the useamount of an ashless dispersant and an antiwear agent, and can be used for improving the viscosity-temperature properties of gasoline engine oil and diesel engine oil.

Description

technical field [0001] The invention relates to a viscosity index improver, in particular to a viscosity index improver for lubricating oil. Background technique [0002] With the continuous improvement of environmental protection and emission requirements of internal combustion engines, engines with high fuel economy, high power, and miniaturization are the future development direction. The resulting engine working environment is becoming more and more harsh. Oxidation and soot dispersibility pose new requirements. [0003] In order to solve the above problems, first, it can be solved by increasing the amount of detergent and dispersant, which makes the production cost of internal combustion engine oil rise and weakens the market competitiveness of the product. Another method can be solved by improving the performance of existing additives and increasing the performance of viscosity index improvers. For example, the use of dispersive ethylene-propylene copolymer viscosity...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F222/06C08F8/32C10M149/02C10N30/02C10N30/04C10N30/06C10N30/10C10N30/08C10N40/25
CPCC08F255/023C08F8/32C10M149/02C08F222/06
Inventor 刘依农段庆华张耀
Owner CHINA PETROLEUM & CHEM CORP
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