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Dispersible ethylene-propylene copolymer and preparation method thereof

An ethylene-propylene copolymer, dispersed technology, applied in the field of dispersed ethylene-propylene copolymer and its preparation, can solve the problems of multi-energy, consumption, lengthy and complicated process, etc., and achieve the effects of simple preparation method, cost reduction and energy saving

Active Publication Date: 2014-06-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The post-processing process makes the process too lengthy and complicated, and consumes more energy at the same time

Method used

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  • Dispersible ethylene-propylene copolymer and preparation method thereof
  • Dispersible ethylene-propylene copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Add 50g maleic anhydride-grafted ethylene-propylene copolymer (10% graft rate) and 1000g III base oil into a four-neck flask with stirring and nitrogen protection, and dissolve at a temperature of 130°C for about 4 hours. Then the temperature was raised to 150°C, and under the protection of nitrogen, 0.25 g of N-(1-naphthyl)ethylenediamine was added, and the mixture was reacted at 150°C for 6 hours. Utilize vacuum distillation to extract, the internal pressure during extraction is 2mmHg, extraction temperature is 200 ℃, extract 2 hours, remove the unreacted N-(1-naphthyl)ethylenediamine and its derivatives, Finally, the dispersed ethylene-propylene copolymer, that is, the dispersed viscosity index improver product a-1, was obtained.

Embodiment 2

[0022] Add 50g maleic anhydride-grafted ethylene-propylene copolymer (5% graft rate) and 1000g III base oil into a four-neck flask with stirring and nitrogen protection, and dissolve at a temperature of 130°C for about 4 hours. Keeping the temperature, under the protection of nitrogen, 0.5 g of N-(1-naphthyl)ethylenediamine was added and reacted for 6 hours. Utilize vacuum distillation to extract, the internal pressure during extraction is 2mmHg, extraction temperature is 200 ℃, extract 2 hours, remove the unreacted N-(1-naphthyl)ethylenediamine and its derivatives, Finally, the dispersed ethylene-propylene copolymer, namely the dispersed viscosity index improver product a-2, was obtained.

Embodiment 3

[0024] Add 50g maleic anhydride-grafted ethylene-propylene copolymer (5% graft rate) and 1000g III base oil into a four-neck flask with stirring and nitrogen protection, and dissolve at a temperature of 130°C for about 4 hours. The temperature was raised to 170° C., under the protection of nitrogen, 1 g of N-(1-naphthyl)ethylenediamine was added, and the reaction was carried out at 170° C. for 6 hours. Utilize vacuum distillation to extract, the internal pressure during extraction is 2mmHg, extraction temperature is 210 ℃, extract 3 hours, remove the unreacted N-(1-naphthyl)ethylenediamine and its derivatives, Finally, a dispersed ethylene-propylene copolymer, that is, a dispersed viscosity index improver product a-3, was obtained.

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Abstract

The invention provides a dispersible ethylene-propylene copolymer and a preparation method thereof. The dispersible ethylene-propylene copolymer comprises, by weight, 90-99.7% of an anhydride group-grafted ethylene-propylene copolymer and 0.3-10% of N-(1-naphthyl)ethylenediamine and its derivatives. The preparation method comprises that the anhydride group-grafted ethylene-propylene copolymer and N-(1-naphthyl)ethylenediamine and its derivatives undergo a reaction in the presence of base oil to produce a glue solution containing the dispersible ethylene-propylene copolymer. The preparation method has the advantages that the product color is not changed easily by oxidization, amide residues can be removed by reduced pressure distillation, an after-treatment reaction is avoided, preparation processes are simple, and energy is saved. The dispersible ethylene-propylene copolymer can be used as a dispersion viscosity index improver and can be used in lubricating oil. Through use of the dispersible ethylene-propylene copolymer, oil products have excellent dispersion performances.

Description

technical field [0001] The invention relates to a dispersed ethylene-propylene copolymer for lubricating oil and a preparation method thereof. Background technique [0002] With the increasingly stringent emission regulations of automobiles, automobile engine manufacturers continue to innovate and improve engine technologies, such as adding turbochargers to engines, using delayed injection technology, and adopting waste recycling technology (EGR), etc. These new technologies increase the power of the engine while greatly reducing emissions of nitrogen oxides and particulate matter. However, these technologies have increased the requirements for the performance of internal combustion engine oils, such as soot dispersion performance. [0003] In recent years, in order to improve the soot dispersing performance of lubricating oil, polymer dispersants, such as dispersive viscosity index improvers, have been used in the formulation of internal combustion engine oils. U.S. Paten...

Claims

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Application Information

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IPC IPC(8): C08F255/04C08F8/32C10M149/02
Inventor 肖奇刘洋翟月奎张东恒魏观为
Owner PETROCHINA CO LTD
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