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Catalytic system for preparing polar group-containing polyolefin and preparation method of the polyolefin

A catalytic system and polar group technology, applied in the field of polyolefin materials, can solve the problems of reduced copolymerization activity, catalyst deactivation, and low molecular weight of polymers

Active Publication Date: 2017-12-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the literature that there are several problems in this direction at present: 1) Since the polar group close to the double bond is very easy to coordinate with the active center, resulting in deactivation of the catalyst, so in most research and development Among them, the co-monomers with polar groups for polymerization are all long-chain comonomers, that is, there are more carbon atoms between the olefin double bond and the polar group, so as to ensure that the polar group does not bring too much Activity loss; 2) Although a longer chain length polar monomer is used, the interaction between the polar group and the active center is still inevitable. Compared with the homopolymerization of α-olefin, α-olefin and polar monomer 3) Compared with the homopolymerization of α-olefin, the molecular weight of the polymer obtained by the copolymerization of α-olefin and polar monomer is also much lower

Method used

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  • Catalytic system for preparing polar group-containing polyolefin and preparation method of the polyolefin
  • Catalytic system for preparing polar group-containing polyolefin and preparation method of the polyolefin
  • Catalytic system for preparing polar group-containing polyolefin and preparation method of the polyolefin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Fully dry the polymerization device, then vacuumize it and flush it with nitrogen, repeat three times. The polymerization device is vacuumized again, controlled by a solenoid valve, charged with ethylene, 25.8 milliliters of toluene is added at 25° C., 0.1 milliliters of 9-decen-1-alcohol is added, 0.6 milliliters of triisobutylaluminum toluene solution (1.1 mol / mL), stirred for 10 minutes. Add 3 mL of MAO toluene solution (1.67 mol / ml) and 1 ml of transition metal compound (X=Cl) solution (10 micromol / ml) described in formula I, and start timing. After 20 minutes, turn off ethylene, add acidified ethanol to the reaction solution, stir for more than 6 hours, filter to obtain the polymer, vacuum dry the obtained polymer at 60° C. for 24 hours, and weigh to obtain 0.49 g of the polymer. The specific reaction conditions and results are listed in Table 1. The CPC test curve, DSC curve and the compound that present embodiment makes 13 C-NMR test results are as follows ...

Embodiment 2

[0059] Fully dry the polymerization device, then vacuumize it and flush it with nitrogen, repeat three times. The polymerization device is vacuumized again, controlled by a solenoid valve, charged with ethylene, 25.1 milliliters of toluene is added at 25° C., 0.2 milliliters of 9-decen-1-ol is added, 1.2 milliliters of triisobutylaluminum toluene solution (1.1 mol / mL), stirred for 10 minutes. Add 3 mL of MAO toluene solution (1.67 mol / ml) and 1 ml of transition metal compound (X=Cl) solution (10 micromol / ml) described in formula I, and start timing. After 20 minutes, turn off ethylene, add acidified ethanol to the reaction solution, stir for more than 6 hours, filter to obtain the polymer, vacuum dry at 60° C. for 24 hours, and weigh to obtain 0.61 g of the polymer. The specific reaction conditions and results are listed in Table 1.

Embodiment 3

[0061] Fully dry the polymerization device, then vacuumize it and flush it with nitrogen, repeat three times. The polymerization device is vacuumized again, controlled by a solenoid valve, charged with ethylene, 24.4 milliliters of toluene is added at 25° C., 0.3 milliliters of 9-decen-1-alcohol is added, 1.8 milliliters of triisobutylaluminum toluene solution (1.1 mol / mL), stirred for 10 minutes. Add 3 mL of MAO toluene solution (1.67 mol / ml) and 1 ml of transition metal compound (X=Cl) solution (10 micromol / ml) described in formula I, and start timing. After 20 minutes, turn off the ethylene, add acidified ethanol to the reaction solution, stir for more than 6 hours, filter to obtain the polymer, vacuum dry at 60° C. for 24 hours, and weigh to obtain 0.43 g of the polymer. The specific reaction conditions and results are listed in Table 1.

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Abstract

The invention relates to a catalysis system for preparing polyolefin containing polar groups. The catalysis system comprises: a) a transition metal compound represented by formula I and used as a main catalyst, wherein X in the formula I is selected from halogens; b) a cocatalyst; c) ethylene; and d) alpha-olefin with polar groups. The invention also relates to a method for preparing a polyolefin material containing the polar groups. A copolymerization reaction of ethylene and olefin with the polar groups is carried out in the presence of the main catalyst represented by formula I and the cocatalyst.

Description

technical field [0001] The invention belongs to the field of catalysis and olefin polymerization, and relates to a catalyst system for olefin polymerization composed of a transition metal compound with a specific structure and an alkyl aluminoxane. The catalyst system can catalyze ethylene and polar groups (such as hydroxyl ) olefin copolymerization to obtain a polyolefin material containing polar groups. Background technique [0002] Single-site transition metal catalysts for olefin polymerization have been a research hotspot in organometallic chemistry, catalysis, polymer chemistry, and materials science in recent decades. Using this type of catalyst, olefin polymers with uniform molecular weight distribution and chemical composition distribution can be obtained. At the same time, the molecular structure and molecular weight of the polymer can be highly controlled by adjusting the catalyst structure. Through single-site catalysts, olefin polymers that cannot be obtained w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F4/642
Inventor 王伟侯莉萍郑刚王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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