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Catalyst composition for ethylene polymerization and its application

A technology for ethylene polymerization and catalysts, which is applied in the field of catalyst compositions, and can solve the problems of insignificant differences in polymer structure properties and inability to change polymer block composition, etc.

Active Publication Date: 2021-10-19
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 for ethylene polymerization and its application
  • Catalyst composition for ethylene polymerization and its application
  • Catalyst composition for ethylene polymerization and its application

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 present invention relates to a catalyst composition for ethylene polymerization and its application. The catalyst composition of the present invention comprises the following components or the reaction products of the following components: catalyst A represented by general formula 1, catalyst B represented by general formula 2 and a chain shuttling agent. The catalyst composition of the present invention is used for olefin polymerization to produce multi-block copolymers with both high crystallinity and non-deterministic blocks or segments. General formula 1 General formula 2.

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 Patents(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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