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Propylene-conjugated diene copolymer and preparation method thereof

A technology of conjugated diene and copolymer, applied in the field of preparation of propylene copolymer

Active Publication Date: 2021-05-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a propylene-conjugated diene copolymer and its preparation method to solve the technical problems existing in polypropylene in the prior art

Method used

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  • Propylene-conjugated diene copolymer and preparation method thereof
  • Propylene-conjugated diene copolymer and preparation method thereof
  • Propylene-conjugated diene copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Under anhydrous and oxygen-free conditions, using toluene as a solvent, the reactor is filled with a metal catalyst system, the temperature in the reactor is controlled at 25°C, and the pressure is 0.1MPa, and propylene gas is passed into the reactor for polymerization reaction. The reaction time 2min to obtain the hard segment structure of propylene homopolymer; while maintaining the propylene gas feed, feed butadiene gas to make butadiene and propylene carry out copolymerization reaction under the metal catalyst system, the reaction time is 8min, for The mixed solution obtained after terminating the reaction is precipitated, filtered, and dried to obtain a propylene-butadiene copolymer.

[0055] Among them, the metal catalyst system includes:

[0056] A. Ethyl bridged dichlorodiindene zirconium complex catalyst;

[0057] B. Triethylaluminum, the effect of triethylaluminum is to handle the reactor;

[0058] C.[Ph 3 C][B(C 6 f 5 ) 4 ] activator;

[0059] The mola...

Embodiment 2

[0063] Under anhydrous and oxygen-free conditions, using toluene as a solvent, the reactor is filled with a metal catalyst system, the temperature in the reactor is controlled at 25°C, and the pressure is 0.1MPa, and propylene gas is passed into the reactor for polymerization reaction. The reaction time 2min to obtain the hard segment structure of propylene homopolymer; while maintaining the propylene gas feed, feed butadiene gas to make butadiene and propylene carry out copolymerization reaction under the metal catalyst system, the reaction time is 8min, for The mixed solution obtained after terminating the reaction is precipitated, filtered, and dried to obtain a propylene-butadiene copolymer.

[0064] Among them, the metal catalyst system includes:

[0065] A. Lutidine imine hafnium metal complex catalyst;

[0066] B. Triisobutylaluminum, the effect of triisobutylaluminum is to handle the reactor;

[0067] C.[Ph 3 C][B(C 6 f 5 ) 4 ] activator;

[0068] The molar rati...

Embodiment 3

[0076] Under anhydrous and oxygen-free conditions, using chlorobenzene as a solvent, the reactor is filled with a metal catalyst system, the temperature in the reactor is controlled at 20°C, and the pressure is 0.1MPa, and propylene gas is passed into the reactor for polymerization reaction. The time is 1min, and the hard segment structure of propylene homopolymer is obtained; while the propylene gas is kept flowing, the isoprene gas is passed into, so that the isoprene and propylene are copolymerized under the metal catalyst system, and the reaction time is After 3 minutes, the mixed solution obtained after terminating the reaction was precipitated, filtered, and dried to obtain a propylene-isoprene copolymer.

[0077] Among them, the metal catalyst system includes:

[0078] A. β-diketoimine titanium metal complex catalyst;

[0079] B. Isobutyl aluminoxane, the role of isobutyl aluminoxane is to treat the reactor and activate the catalyst;

[0080] The molar ratio of isobut...

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Abstract

The invention discloses a propylene-conjugated diene copolymer and a preparation method thereof. The method specifically comprises the following steps: adding propylene to prepare a propylene homopolymer serving as a hard segment by adopting a group of catalyst systems and a time-phased feeding method; and then adding a comonomer conjugated diene into the reaction container at a certain time interval, and carrying out a copolymerization reaction to prepare the block copolymer which takes the isotactic polypropylene as a hard segment and takes the propylene and conjugated diene random copolymer as a soft segment. Due to the existence of a propylene homopolymerization chain segment, the copolymer not only can retain excellent properties such as high-strength mechanical property, chemical resistance, heat resistance and electric insulation property, but also can well improve the flexibility, the tensile property and the impact resistance of the material as the propylene and conjugated diene random copolymer is introduced as a soft segment; the rigid-tough balance state is well achieved; and a one-pot segmented polymerization method is adopted, the process is simple, convenient and easy to control, and a novel method for copolymerization of propylene and conjugated diene is obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of propylene copolymers, in particular to a propylene-conjugated diene copolymer and a preparation method thereof. Background technique [0002] Polypropylene is a high molecular polymer produced by coordination polymerization of propylene under the action of Ziegler-Natta (Ziegler-Natta) catalyst. It is a thermoplastic resin and is currently the second largest polyolefin product after polyethylene. Polypropylene has good mechanical properties, heat resistance and chemical stability. It can withstand high temperatures of 150°C, and its decomposition temperature is as high as 300°C. It does not react to most chemical reagents. It is commonly used as a storage chemical reagent. one of the materials. Due to various advantages, polypropylene is widely used in various aspects closely related to people's life, such as the automobile industry, household appliances, electronics, packaging and buildin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F210/06C08F236/06C08F236/08C08F4/6592C08F4/659C08F4/64
CPCC08F210/06C08F293/00C08F236/06C08F2500/03C08F236/08C08F4/65927C08F4/65912C08F4/64048
Inventor 潘莉吕仪高欢李悦生
Owner TIANJIN UNIV
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