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Olefin Polymer And Preparation Method Thereof

a technology of olefin polymer and olefin polymer, which is applied in the field of olefin polymer, can solve the problems of increasing the use of stretch films, reducing the mechanical properties of conventional lldpe, and poor processability of lldpe for blown films, so as to achieve excellent film processability and physical properties, and excellent mechanical strength. , the effect of high processability

Inactive Publication Date: 2019-09-19
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present disclosure describes an olefin polymer with excellent film processability and physical properties. The polymer has a optimized branched structure with controlled content of branching, molecular weight, and number of long chain branches. This hybrid supported catalyst results in a stable film during production by melt blown process, which makes it useful for various products requiring high mechanical strength and processability. The unique features of the polymer make it suitable for various applications. The method involves using a specific transition metal compound to control the structure of the polymer.

Problems solved by technology

The feature of LLDPE has led to an increase in the use of a stretch film, an overlapping film or the like which is difficult to apply existing low density polyethylene or high density polyethylene.
However, LLDPE has poor processability for a blown film compared to excellent mechanical properties.
However, this method has a problem of significantly reducing the mechanical properties of conventional LLDPE even when a very small amount of LDPE is added.
Therefore, a method of improving the processability of the film by introducing LCB into LLDPE has been proposed, but the deterioration of the film properties has not been solved yet.

Method used

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  • Olefin Polymer And Preparation Method Thereof
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  • Olefin Polymer And Preparation Method Thereof

Examples

Experimental program
Comparison scheme
Effect test

synthesis example 1

tion Metal Compound (Metallocene Catalyst Precursor A)

[0172]

[0173]Tetramethylcyclopentadiene (TMCP, 6.0 mL, 40 mmol) was dissolved in THF (60 mL) in a dried 250 mL Schlenk flask and then cooled to −78° C. Then n-BuLi (2.5 M, 17 mL, 42 mmol) was slowly added dropwise to the above solution, and the mixture was stirred overnight at room temperature.

[0174]On the other hand, dichlorodimethylsilane (4.8 mL, 40 mmol) was dissolved in n-hexane in another 250 mL Schlenk flask and then cooled to −78° C. Then, the TMCP-lithiation solution previously prepared was slowly added to this solution, and the mixture was stirred overnight at room temperature. Thereafter, the resulting solution was subjected to reduced pressure to remove solvent. The resulting solid was dissolved in toluene and filtered to remove residual LiCl, thereby obtaining chlorodimethyl(2,3,4,5-tetramethylcyclopenta-2,4-dien-1-yl) silane as an intermediate (yellow liquid, 7.0 g, 33 mmol, 83% yield).

[0175]1H NMR (500 MHz, CDCl3): ...

synthesis example 2

tion Metal Compound (Metallocene Catalyst Precursor B)

[0180]

[0181]The metallocene compound (B) having the above structural formula was prepared (purchased from Strem Corporation, Cas Number 12148-49-1).

synthesis example 3

tion Metal Compound (Metallocene Catalyst Precursor C)

[0182]Tetramethylcyclopentadiene (TMCP, 6.0 mL, 40 mmol) was dissolved in THF (60 mL) in a dried 250 mL Schlenk flask and then cooled to −78° C. Then n-BuLi (2.5 M, 17 mL, 42 mmol) was slowly added dropwise to the above solution, and the mixture was stirred overnight at room temperature.

[0183]On the other hand, dichlorodimethylsilane (4.8 mL, 40 mmol) was dissolved in n-hexane in another 250 mL Schlenk flask and then cooled to −78° C. Then, the TMCP-lithiation solution previously prepared was slowly added to this solution, and the mixture was stirred overnight at room temperature.

[0184]Thereafter, the resulting solution was subjected to reduced pressure to remove solvent. The resulting solid was dissolved in toluene and filtered to remove residual LiCl, thereby obtaining an intermediate (yellow liquid, 7.0 g, 33 mmol, 83% yield).

[0185]1H NMR (500 MHz, CDCl3): 0.24 (6H, s), 1.82 (6H, s), 1.98 (6H, s), 3.08 (1H, s).

[0186]Indene (0....

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Abstract

The present disclosure provides an olefin polymer having excellent film processability and physical properties, and a preparation method of the same.

Description

TECHNICAL FIELDCross-Reference to Related Application[0001]This application claims the benefit of Korean Patent Application No. 10-2016-0174938 filed on Dec. 20, 2016 with the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety.[0002]The present disclosure relates to an olefin polymer having excellent film processability and physical properties, and a preparation method of the same.BACKGROUND OF ART[0003]A linear low density polyethylene (LLDPE) is produced by copolymerizing ethylene and an alpha olefin using a polymerization catalyst under low pressure. Thus, this is a resin having a narrow molecular weight distribution and a certain length of a short chain branch (SCB), without a long chain branch (LCB). LLDPE film has high strength at break and elongation in addition to the properties of a general polyethylene and exhibits excellent tear strength, falling weight impact strength or the like. The feature of LLDPE has ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08F210/16C08F4/659C08F4/6592C08F210/14
CPCC08F4/65925C08F4/65916C08F2500/09C08F210/16C08F210/14C08F2500/03C08F2500/26C08F4/65927C08F2500/08C08F2500/18C08F2500/11C08F2500/12C08F4/65904C08J5/18C08F4/65912C08J2323/08C08F2500/31C08F210/02C08F4/65922C08L23/0815
Inventor KWON, OH JOOCHO, SOLPARK, SEUNG KILEE, KI SOOKWON, HEON YONGHONG, DAE SIKPARK, SUNG HYUNPARK, SUNG HOLEE, JIN YOUNG
Owner LG CHEM LTD
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