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Organic zinc compound comprising polyolefin-polystyrene block copolymer, and method for preparing same

A compound, organic zinc technology, applied in the direction of silicon organic compounds, zinc organic compounds, organic chemistry, etc., can solve problems that require multi-stage engineering, cannot be applied to commercial engineering, etc.

Active Publication Date: 2017-11-28
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the methods reported in the past cannot be applied to commercial projects due to problems such as requiring multi-stage processes.

Method used

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  • Organic zinc compound comprising polyolefin-polystyrene block copolymer, and method for preparing same
  • Organic zinc compound comprising polyolefin-polystyrene block copolymer, and method for preparing same
  • Organic zinc compound comprising polyolefin-polystyrene block copolymer, and method for preparing same

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preparation example Construction

[0070] Process for the preparation of organozinc compounds comprising block copolymers

[0071] Another example of the present invention relates to the preparation method of the organozinc compound of the chemical formula 1.

[0072] The method for preparing an organozinc compound comprising a polyolefin-polystyrene block copolymer of the present invention prepares the organozinc compound of Chemical Formula 1 by using olefin monomers and styrene monomers as reactants. The organozinc compound of 1 prepared by this method can be easily converted into an industrially useful polyolefin-polystyrene block copolymer having a structure represented by the following chemical formula 7 by reacting with water, oxygen, or an organic acid.

[0073] Also, the method for preparing an organozinc compound of the present invention has the advantage that it is easy to obtain polyolefin-polystyrene block copolymerization only by a simple process of continuously feeding water, oxygen, or organic a...

Embodiment 1

[0129] Example 1: Preparation of organozinc compounds containing polystyrene groups [chemical formula 1 (a=0, A=hexyl (hexyl), Ar=phenyl (Ph))]

[0130] After dihexylzinc compound (11.3mg, 0.048mmol) was dissolved in methylcyclohexane (2.5g) and put into a 1-necked flask, at the same time, n- Butyl lithium (6.2 mg, 0.096 mmol, [Li] / [Zn]=0.20) and tetramethylethylenediamine (11.2 mg, 0.096 mmol) as a compound of Chemical Formula 5. After stirring for 10 minutes, dissolved styrene monomer (2.5 g, 24 mmol, [styrene] / [zinc]=500) was added to methylcyclohexane (2.5 g), followed by anionic polymerization at 90 for 2 hours. The conversion of styrene to polystyrene was confirmed by nuclear magnetic resonance (NMR) spectroscopy.

[0131] After decomposing an organozinc compound and an organolithium compound including polystyrene produced by adding ethanol (1 mL), it was dissolved in methylcyclohexane and passed through a silica gel pad to obtain pure polystyrene. The quality of pure ...

Embodiment 2

[0137] An experiment was performed in the same manner as in Example 1, except that the amount of n-butyllithium·(tetramethylethylenediamine) was increased by 5 times (ie, [Li] / [Zn]=1.0). It was confirmed that the number of polystyrene polymer chains generated from the organozinc compound was (ie, {[PS-chain]-[Li]} / [Zn]) 1.97, and the polymer chains were efficiently grown bidirectionally from the zinc compound.

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Abstract

The present invention relates to an organic zinc compound comprising a styrene-based polymer or a polyolefin-polystyrene block copolymer at both ends. Also, the present invention relates to a method for preparing the organic zinc compound, the method preparing an intermediate by coordination-polymerizing an olefin monomer using a transition metal catalyst, and then performing anionic polymerization by inserting an alkyllithium compound, an amine ligand, and a styrene-based monomer into the intermediate. Accordingly, the present invention can provide a method for preparing a commercially useful styrene-based polymer or polyolefin-polystyrene block copolymer directly from an olefin monomer and a styrene monomer in a one-pot manner.

Description

technical field [0001] The present invention relates to organozinc compounds comprising polyolefin-polystyrene block copolymers and a preparation method thereof. Background technique [0002] In polyolefin-polystyrene block copolymers, for example, styrene-ethylene / butylene-styrene (styrene-ethylene / butylene-styrene, SEBS) or styrene-ethylene / propylene-styrene (styrene-ethylene / propylene-styrene, SEPS) has formed a market of hundreds of thousands of tons in the world. And, compared to styrene-butadiene-styrene (SBS) or styrene-isoprene-styrene (styrene-isoprene-styrene, SIS), these have internal heat resistance and light resistance Excellent advantages, and used as a material for imparting a soft and strong touch to handles and handles, elastic materials for diapers, oil gels for medical and communication materials, impact reinforcement materials for engineering plastics, transparent polypropylene (flexibilizer) Or toughener (toughener), etc. The existing styrene-ethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F17/00C07F3/06C07F7/02C08F212/08C08F4/44
CPCC07F3/06C07F7/02C07F17/00C08F4/44C08F212/08C07F19/00C08F112/08C08F295/00C08F297/02C08F297/083C08F4/50
Inventor 李泍烈田鐘烨朴根镐
Owner LG CHEM LTD
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