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 problem of large addition amount

Pending 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

[0098] The preparation of embodiment 1 ethylene-propylene copolymer viscosity index improver OCP

[0099] In a 2000 ml three-neck flask with temperature control, water cooling and stirring, add 100 grams of ethylene-propylene copolymer (Mw=182000, 55% ethylene content, purchased from China Petroleum Jilin Petrochemical Company), cut into 0.5cm 3 Then add 900 grams of 150SN (produced by Sinopec Gaoqiao Petroleum Company), heat up to 135 ° C, control the stirring to 300 rpm, and keep the temperature for 5 hours to obtain 1000 grams of viscosity index improver. Analysis Its weight-average molecular weight Mw=116310, and the ethylene content is 55%.

Embodiment 2

[0100] Embodiment 2 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP1

[0101] Take 100 grams (0.000086 mol) of the OCP viscosity index improver prepared in Example 1, put it into a 250 ml three-necked bottle with temperature control, water cooling, and stirring, protect it with nitrogen, and heat up to 85 ° C, then add the initiator to pass Add 1.0 g of benzoyl oxide, add 1.4 g of N-bromosuccinimide (0.0088 mol, dissolved in 6 g of carbon tetrachloride), control the reaction temperature at 75°C, react for 5 hours, add 1.0 g of p-hydroxyaniline (0.009mol), control the reaction temperature to 75°C, react for 50 minutes, and then filter to remove the solid residue.

[0102] Add 1.5 g of azobisisobutyronitrile and 2.4 g (0.024 mol) of maleic anhydride to the brominated tackifier obtained above, and carry out grafting reaction at 150° C. for 2 hours. After the reaction, nitrogen was purged at 150° C. for 2 hours to remove unreacted maleic anhydr...

Embodiment 3

[0103] Embodiment 3 Preparation of dispersed ethylene-propylene copolymer viscosity index improver DOCP2

[0104] Take 100 grams (0.000086 mol) of the viscosity index improver obtained by the reaction in Example 1, add it into a 250 ml three-neck flask with temperature control, water cooling, and stirring, protect it with nitrogen, and heat up to 85 ° C, then add the initiator azo 1.2 grams of diisobutyronitrile, and add 0.8 grams (0.01mol) of bromine water, control the reaction temperature to 80°C, react for 4 hours, then add 1.0 grams (0.009mol) of m-hydroxyaniline, react for 30 minutes, then filter to remove solid residue .

[0105] Add 1.2 grams of benzoyl peroxide and 2.8 grams (0.0286 mol) of maleic anhydride to the above brominated tackifier, and carry out grafting reaction at 150° C. for 2 hours. After the reaction, nitrogen was purged at 150° C. for 2 hours to remove unreacted maleic anhydride. Then control the temperature at 110°C, drop 3.6 grams (0.025mol) of trie...

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Abstract

The invention provides a viscosity index improver as well as a preparation method and application thereof. The viscosity index improver provided by the invention has a structure as shown in a generalformula (I) or (II), wherein the definitions of all groups are shown in the specification. The viscosity index improver provided by the invention has good oxidation resistance, dispersibility and wearresistance, can be used for improving viscosity-temperature properties of gasoline engine oil and diesel engine oil, and also can reduce the usage amount of an ashless dispersant.

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): C10M143/04C10M149/14C10M149/18C10M177/00C10N30/02C10N30/04C10N30/10C10N30/08C10N30/06
CPCC10M143/04C10M149/14C10M149/18C10M177/00C10M2205/022C10M2205/024C10M2217/06
Inventor 刘依农段庆华张耀
Owner CHINA PETROLEUM & CHEM CORP
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