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Ansa-metallocene compound and method for preparing supported catalyst using same

A metallocene compound, compound technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as unsatisfactory results

Active Publication Date: 2015-01-07
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, although various studies are being carried out on ansa-metallocene compounds which have high activity and have been able to control the microstructure of olefin polymers, the results are not satisfactory

Method used

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  • Ansa-metallocene compound and method for preparing supported catalyst using same
  • Ansa-metallocene compound and method for preparing supported catalyst using same
  • Ansa-metallocene compound and method for preparing supported catalyst using same

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preparation example Construction

[0073] In addition, in addition to the above-mentioned steps, any generally performed steps in the art may be further included before or after each step, and the production method of the present invention is not limited to the above-mentioned steps.

[0074] Meanwhile, according to another embodiment of the present invention, an olefin polymerization catalyst including the ansa-metallocene compound is provided.

[0075] The ansa-metallocene compound according to the present invention can be used as an olefin polymerization catalyst by itself, or can be used as a catalyst precursor together with a cocatalyst as an olefin polymerization catalyst.

[0076] The olefin polymerization catalyst may be a catalyst supported on a carrier.

[0077] As the support, those generally used in the art can be used without particular limitation, and preferably, at least one selected from silica, silica-alumina, silica-magnesia can be used kind. When the catalyst is supported on a silica carrie...

Embodiment 1

[0111]The ansa-metallocene compound of Chemical Formula 2 and the olefin polymerization supported catalyst including the ansa-metallocene compound were prepared under the conditions described in Table 1 below.

[0112] [chemical formula 2]

[0113]

[0114] Synthesis of metallocenes

[0115] Step 1: Synthesis of (6-tert-butoxyhexyl)methyldichlorosilane

[0116] Slowly drop 100 mL of tert-butoxy into 100 mL of methyltrichlorosilane solution (about 0.21 mol, hexane) at -100 base Hexylmagnesium chloride solution (approximately 0.14 mol, diethyl ether) for 3 hours, followed by stirring at room temperature for 3 hours.

[0117] After separation of the clear organic layer from the solution mixture, the clear organic layer thus formed was vacuum dried and excess methyltrichlorosilane was removed to obtain (6-tert-butoxyhexyl)methyldichlorosilane as a clear liquid (Yield 84%).

[0118] 1 H NMR (500MHz, CDCl 3 ,7.24ppm):0.76(3H,s),1.11(2H,t),1.18(9H,s),1.32~1.55(8H,m),3.33...

preparation Embodiment 1～2 and comparative preparation Embodiment 1～4

[0181] Polypropylene polymers were prepared using the metallocene catalysts prepared in Example 1 and Comparative Examples 1 to 4, respectively, as follows.

[0182] Propylene polymerization

[0183] First, a 2 L stainless steel reactor was dried and cooled at 65° C., 1.5 mmol of triethylaluminum was added thereto at room temperature, and then 0.37 L of hydrogen and 1.5 L of propylene were sequentially added. Thereafter, the mixture was stirred for 10 minutes, and then 0.019 g of each metallocene catalyst prepared in Example 1 and Comparative Examples 1 to 3 was added to the reactor under a nitrogen atmosphere. At this point, hydrogen was added simultaneously with the metallocene catalyst. Subsequently, the temperature of the reactor was slowly raised to 70° C., at which temperature polymerization was performed for 1 hour. After the reaction is completed, unreacted propylene monomer is discharged.

[0184] The content and activity of the catalyst and the properties of the...

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Abstract

This disclosure relates to an ansa-metallocene compound of a novel structure that can provide various selectivities and activities to polyolefin copolymers, a preparation method thereof, and a method for preparing polyolefins using the ansa-metallocene compound.

Description

technical field [0001] The invention relates to an ansa-type metallocene compound and a method for preparing a supported catalyst by using the compound. Background technique [0002] Ansa-metallocenes are organometallic compounds containing 2 ligands linked by a bridging group. The bridging group prevents rotation of the ligand and determines the structure and activity of the metal center. [0003] One potential application of ansa-metallocenes is in the polymerization of olefin homopolymers or copolymers. In particular, ansa-metallocenes based on cyclopentadienyl-fluorenyl ligands have become very important in the polymerization of high molecular weight polyethylene with controlled microstructure. Furthermore, ansa-metallocenes containing indenyl ligands have excellent activity and can be used to produce polyolefins with high stereoregularity. [0004] As described above, although various studies are being conducted on ansa-metallocene compounds which have high activity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F17/00B01J31/12C08F10/00
CPCC07F17/00C08F4/65927B01J31/12C08F10/00B01J31/2295C08F4/65908C08F4/76C08F110/06
Inventor 李镇友崔英芽李暖莹朴哲英李东佶
Owner LG CHEM LTD
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