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Catalyst composition used for ethylene polymerization, and application thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst composition, and can solve the problems that the composition of polymer blocks cannot be changed, and the difference in polymer structure and properties is not obvious.

Active Publication Date: 2019-09-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that although the two stereo configurations have different polymerization characteristics (such as different polymerization rates), the structural properties of the polymers produced by the corresponding stereo configurations are not significantly different.
In addition, the content ratio of the two stereoconfigurations is fixed, so the block composition of the polymer cannot be changed using this type of catalyst

Method used

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  • Catalyst composition used for ethylene polymerization, and application thereof
  • Catalyst composition used for ethylene polymerization, and application thereof
  • Catalyst composition used for ethylene polymerization, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] At high temperature, vacuumize the 1L high-pressure stainless steel polymerization kettle, and replace ethylene gas three times near the polymerization temperature (60°C). Under ethylene atmosphere, 500 mL of toluene solvent was added. With the inflow of toluene solvent, cocatalyst (8ml concentration is the toluene solution of 1.53M methylalumoxane) and chain shuttling agent (0.8ml concentration is the toluene solution of 1.5M diethylzinc) to add through syringe; Catalyst A (6 ml of a toluene solution with a concentration of 1.0 μM) and catalyst B (2 ml of a toluene solution with a concentration of 1.0 μM) were added by syringe. Quickly feed ethylene gas and maintain the pressure of 1.0Mpa in the polymerization tank, and the monomer is polymerized at 60°C for 30 minutes. The temperature of the kettle was lowered to about room temperature, and the polymer solution was discharged and treated with acidified ethanol. After that, it was filtered with suction, dried in vacu...

Embodiment 2

[0092] At high temperature, vacuumize the 1L high-pressure stainless steel polymerization kettle, and replace ethylene gas three times near the polymerization temperature (60°C). Under ethylene atmosphere, 500 mL of toluene solvent was added. Along with the inflow of toluene solvent, cocatalyst (8ml concentration is the toluene solution of 1.53M methylalumoxane) and chain shuttling agent (1.6ml concentration is the toluene solution of 1.5M diethylzinc) to add by syringe; Catalyst A (6 ml of 1.0 μM toluene solution) and catalyst B (2 ml of 1.0 μM toluene solution) were added via syringe. Quickly feed ethylene gas and maintain the pressure of 1.0Mpa in the polymerization tank, and the monomer is polymerized at 60°C for 30 minutes. The temperature of the kettle was lowered to about room temperature, and the polymer solution was discharged and treated with acidified ethanol. After that, it was filtered with suction, dried in vacuum and weighed for the corresponding test in the l...

Embodiment 3

[0094] At high temperature, vacuumize the 1L high-pressure stainless steel polymerization kettle, and replace ethylene gas three times near the polymerization temperature (60°C). Under ethylene atmosphere, 500 mL of toluene solvent was added. With the inflow of toluene solvent, cocatalyst (8ml concentration is the toluene solution of 1.53M methylalumoxane) and chain shuttling agent (1.6ml concentration is the toluene solution of 1.5M diethylzinc) to add through syringe; Catalyst A (4 ml of a toluene solution with a concentration of 1.0 μM) and catalyst B (4 ml of a toluene solution with a concentration of 1.0 μM) were added by syringe. Quickly feed ethylene gas and maintain the pressure of 1.0Mpa in the polymerization tank, and the monomer is polymerized at 60°C for 30 minutes. The temperature of the kettle was lowered to about room temperature, and the polymer solution was discharged and treated with acidified ethanol. After that, it was filtered with suction, dried in vacu...

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Abstract

The invention relates to a catalyst composition used for ethylene polymerization, and an application thereof. The catalyst composition of the present invention comprises a catalyst A represented by formula 1, a catalyst B represented by formula 2 and a chain shuttling agent, or comprises a reaction product of the above three components. The catalyst composition of the present invention can be used in the polymerization of olefins to produce high-crystallinity multiblock copolymers with amorphous blocks or fragments. The formula 1 and the formula 2 are shown in the description.

Description

technical field [0001] The present invention relates to a catalyst composition for ethylene polymerization and its application. Background technique [0002] The properties of block copolymers have long been superior to those of random copolymers and blends. For example, triblock copolymers of styrene and butadiene (SBS) and those formed after hydrogenation (SEBS) exhibit excellent heat resistance and elasticity. Block copolymers have the properties of thermoplastic elastomers because the polymers are composed of polymer chains with an excellent combination of "hard" crystallizable segments and "soft" elastic segments. When the temperature reaches the glass transition temperature or higher melting temperature of the "hard" segment, the polymer has elastic material properties. As the temperature rises further, the polymer chains are easy to flow and exhibit thermoplastic properties. [0003] Anionic polymerization and controlled radical polymerization are common methods fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F4/70
CPCC08F4/7006C08F293/00C08F2410/04
Inventor 刘东兵徐秦文高榕李岩郭子芳傅捷
Owner CHINA PETROLEUM & CHEM CORP
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