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Catalyst for olefin polymerization

A catalyst and co-catalyst technology, applied in the field of online low-density polyethylene, can solve problems such as processability and haze reduction, and achieve the effects of excellent impact strength, haze, and excellent processability

Active Publication Date: 2021-08-17
HANWHA SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, when the strength of the film is excellent, the workability and haze are reduced

Method used

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  • Catalyst for olefin polymerization
  • Catalyst for olefin polymerization
  • Catalyst for olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0159] Both the transition metal compound represented by the chemical formula A-1 purchased from sPCI Company and the transition metal compound represented by the chemical formula B-1 purchased from MCN Company can be used without additional purification process.

[0160] In a glove box, 2.7387 g of the compound represented by the chemical formula A-1 and 3.3741 g of the compound represented by the chemical formula B-1 were mixed with 991.69 g of methylalumoxane (MAO) containing 10% by weight. The toluene solutions were mixed (Al / Zr=150) and stirred at room temperature for 1 hour. In addition, 250 g of silica (XP2402) was added to the reactor, and 500 ml of purified toluene was added and mixed. Thereafter, the transition metal compound solution was injected into the silica slurry, and stirred in an oil bath at 75° C. for 3 hours. The supported catalyst was washed three times with toluene, and dried in vacuum at 60° C. for 30 minutes to obtain 355 g of a hybrid supported catal...

preparation Embodiment 2

[0162] 356 g of a hybrid supported catalyst was obtained in the same manner as in Preparation Example 1 except that 1.8310 g of the compound represented by the chemical formula A-1 and 5.0754 g of the compound represented by the chemical formula B-1 were used.

preparation Embodiment 3

[0164] 359 g of a supported catalyst was obtained in the same manner as in Preparation Example 1 except that 8.5302 g of the compound represented by the chemical formula B-1 was used alone.

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Abstract

The present invention relates to a catalyst for olefin polymerization. Specifically, the present invention relates to a hybrid catalyst comprising different types of transition metal compounds, the catalyst capable of preparing an olefin-based polymer, particularly, a linear low-density polyethylene, having excellent processability and excellent impact strength and haze.

Description

technical field [0001] The present invention relates to a catalyst for polymerizing olefins. More particularly, the present invention relates to a hybrid catalyst comprising different transition metal compounds, by which olefin polymers, especially linear low density polyethylene, can be produced having excellent processability, impact strength and haze . Background technique [0002] As a catalyst for polymerizing olefins, metallocene catalysts are composed of transition metals or transition metal halides and ligands such as cyclopentadienyl, indenyl and cycloheptadienyl, etc. The compound formed by coordination combination has a basic form of a sandwich structure. [0003] As another catalyst used to polymerize olefins, Ziegler-Natta catalysts have inhomogeneous properties of active centers because the metal components serving as active centers are dispersed on an inert solid surface, while metallocenes A catalyst is a compound with a fixed structure and is therefore co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/6592C08F4/659C08F4/52
CPCC08F210/16C08F4/65916Y02P20/52C08F4/65925C08F4/65927C08F2/34C08F210/14C08F2500/05C08F2500/06C08F2500/09C08F2500/10C08F2500/12C08F2500/17C08F2500/19C08F2500/26C08F2500/31C08F4/65904C08F4/65922C08F4/65912C08F4/52C08F2420/00C08L23/0815
Inventor 徐浚豪金雅凜李文熙
Owner HANWHA SOLUTIONS CORP