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Dispersive type ethylene-propylene copolymer and preparation method thereof

An ethylene-propylene copolymer and a dispersion-type technology, applied in the field of dispersion-type ethylene-propylene copolymer and its preparation, can solve the problems of darkening of color, affecting product appearance, and difficulty in dispersing low-temperature sludge, achieving high feasibility, Simple preparation method

Active Publication Date: 2015-01-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the traditional aliphatic amines are not used as aminated compounds in this patent, such as diethylenetriamine, triethylenetetramine, etc., it is difficult to disperse low-temperature sludge
In addition, N-phenyl-1,4-phenylenediamine is easily oxidized during the reaction process to darken the color. If the reaction is not sufficient, the remaining part will seriously affect the appearance of the product

Method used

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  • Dispersive type ethylene-propylene copolymer and preparation method thereof
  • Dispersive type ethylene-propylene copolymer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] Add 1000g ethylene-propylene copolymer solution in a four-necked flask with stirring and nitrogen protection, which contains 100g maleic anhydride-grafted ethylene-propylene copolymer (graft rate 10%) and 900g III group base oil. Under nitrogen protection, 0.5 g of diethylenetriamine was added and reacted at 150° C. for 6 hours. After removing the unreacted diethylenetriamine by vacuum extraction, add 1 g of N-phenylanthranilic acid, react at 190°C for 10 hours, and filter with diatomaceous earth to obtain a dispersed ethylene-propylene copolymer that is dispersed Type viscosity index improver product a-1.

Embodiment 2

[0025] Add 1000g ethylene-propylene copolymer solution in a four-necked flask with stirring and nitrogen protection, which contains 100g maleic anhydride-grafted ethylene-propylene copolymer (graft rate 10%) and 900g III group base oil. Under nitrogen protection, 2 g of diethylenetriamine was added and reacted at 165° C. for 6 hours. After removing unreacted diethylenetriamine by vacuum extraction, add 4 g of N-phenylanthranilic acid, react at 200 ° C for 8 hours, and filter with diatomaceous earth to obtain a dispersed ethylene-propylene copolymer that is dispersed Type viscosity index improver product a-2.

Embodiment 3

[0027] Add 1000g ethylene-propylene copolymer solution in a four-necked flask with stirring and nitrogen protection, which contains 100g maleic anhydride-grafted ethylene-propylene copolymer (graft rate 10%) and 900g III group base oil. Under nitrogen protection, 5 g of diethylenetriamine was added and reacted at 165° C. for 6 hours. After removing unreacted diethylenetriamine by vacuum extraction, add 10 g of N-phenylanthranilic acid, react at 210 °C for 6 hours, and filter with diatomaceous earth to obtain a dispersed ethylene-propylene copolymer, which is a dispersed Type viscosity index improver product a-3.

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Abstract

The invention relates to a dispersive type ethylene-propylene copolymer and a preparation method thereof. The preparation method comprises the following steps: adding acid anhydride group-grafted ethylene-propylene copolymer into base oil for dissolving; adding a functional compound into the solution, reacting for 4-8 hours at the temperature of 120DEG C-220DEG C under protection of nitrogen, to obtain an intermediate product; reacting active constituents of the intermediate product with N-phenylanthranilic acid derivatives for 6-10 hours at the temperature of 180DEG C-220DEG C under the protection of nitrogen, and filtering the product, to obtain a final product, wherein the product has both excellent low-temperature oil-sludge dispersibility and intermediate-temperature and high-temperature soot dispersibility, and the preparation method is simple, high in feasibility, and suitable for industrial mass production.

Description

technical field [0001] The invention relates to a dispersed ethylene-propylene copolymer used in medium and high-grade lubricating oils and a preparation method thereof. Background technique [0002] Dispersed ethylene-propylene copolymer is a multifunctional viscosity index improver, which can not only improve the viscosity-temperature performance of oil, but also bring excellent dispersion performance to oil. U.S. Patent No. 4,089,794 discloses a structure and preparation method of a dispersed ethylene-propylene copolymer. First, the ethylene-propylene copolymer is dissolved in a base oil in a certain proportion, and is mixed with an unsaturated anhydride (such as maleic anhydride) at high temperature. The grafting reaction produces an intermediate product. The product is subjected to amination reaction with an amine compound with a primary amino group to finally generate a dispersed ethylene-propylene copolymer. However, if diethylenetriamine, triethylenetetramine and o...

Claims

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Application Information

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IPC IPC(8): C08F255/04C08F8/32C10M149/02C10N30/02
Inventor 肖奇翟月奎张东恒刘功德张雪涛
Owner PETROCHINA CO LTD
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