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Process for the preparation of propylene copolymers containing high carbon alpha-olefins

A technology of copolymer and copolymer, applied in the field of α-olefin copolymer

Inactive Publication Date: 2018-11-16
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the issue of molecular weight properties in the manufacture of propylene copolymers using higher alpha-olefin comonomers remains unresolved

Method used

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  • Process for the preparation of propylene copolymers containing high carbon alpha-olefins
  • Process for the preparation of propylene copolymers containing high carbon alpha-olefins
  • Process for the preparation of propylene copolymers containing high carbon alpha-olefins

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Experimental program
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preparation example Construction

[0029] Regarding the preparation of the aforementioned catalyst composition, reference may be made to WO 2010 / 052260.

[0030] Catalyst complex

[0031] The single-site metallocene complexes used to make copolymers (PPC), especially the complexes of the chemical formula specified in the present invention, are asymmetric. This means that the two indenyl ligands forming the metallocene complex are different, that is, each indenyl ligand has a set of substituents, which are either chemically different or relative to another indenyl ligand. The body is located in different positions. More precisely, they are chiral, racemic bridged indenyl metallocene complexes. Although the complex of the present invention may be in the cis configuration, it is preferably in the trans configuration. For the purposes of the present invention, racemic-trans means that the two indenyl ligands face different directions with respect to the cyclopentadienyl-metal-cyclopentadienyl plane, while racemic-cis...

Embodiment

[0191] 1. Measurement method

[0192] Unless otherwise specified, the following definitions of terms and measurement methods can be applied to the above general description of the present invention and the following examples.

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Abstract

A process for the preparation of copolymers (PPC) of propylene and C4‑12α‑olefins, said copolymer (PPC) having a melt flow rate MFR2 (230° C.) of less than 3.0 g / 10 min, wherein polymerization is carried out in the presence of a metallocene catalyst next.

Description

Technical field [0001] The present invention relates to a method for preparing propylene and C 4-12 New method for copolymers of alpha-olefins. Background technique [0002] Propylene and C 4-12 The α-olefin copolymers are widely used in fields such as film processing. Such copolymers are often used because of their good optical properties and good sealing properties. The copolymer is preferably produced using a metallocene catalyst. However, in an economical way, that is, with high productivity, propylene and C and C have a relatively low melt flow rate. 4-12 The copolymer of alpha-olefin is very difficult. [0003] EP 2 540 497, EP 2 540 499 and EP 2 540 496 describe the manufacture of products based on propylene-1-hexene copolymers. In these three applications, the copolymer is in the presence of racemic-cyclohexyl(methyl)silanediylbis[2-methyl-4-(4'-tert-butylphenyl)indenyl]zirconium dichloride Next manufacturing. However, the molecular weight capability of the catalyst is...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F4/6592
CPCC08F4/65912C08F210/06C08F4/65927C08F4/6492C08F210/16C08F2500/03C08F2500/12
Inventor 克里斯廷·赖歇尔特路易吉·雷斯科尼罗伯塔·佩莱基尼
Owner BOREALIS AG
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