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Low melting pp homopolymer with high content of regioerrors and high molecular weight

A technology of homopolymer and weight average molecular weight, which is applied in the field of film, fiber, molded product or extrusion coating, pipe and sheet, and can solve the problems of propylene homopolymer molecular weight decrease and failure to reach

Inactive Publication Date: 2016-05-25
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common regio-defect present in almost all isotactic polypropylene produced with highly homologous-specific metallocene catalysts is the 2,1e defect
[0007] In the case of regio-defects, the described propylene homopolymers have the defect that an amount of 2,1-regio-defects higher than 1.8% in the polypropylene chain is not reached, and further, the already increased 2,1- Regio defects usually lead to a significant decrease in the molecular weight of propylene homopolymers

Method used

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  • Low melting pp homopolymer with high content of regioerrors and high molecular weight
  • Low melting pp homopolymer with high content of regioerrors and high molecular weight
  • Low melting pp homopolymer with high content of regioerrors and high molecular weight

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Embodiment Construction

[0237] A. Measurement method

[0238] Unless otherwise stated, the following definitions of terms and assay methods apply to the above general description of the invention as well as to the following examples.

[0239] Quantification of microstructure by NMR spectroscopy

[0240] Quantitative nuclear magnetic resonance (NMR) spectroscopy was used to quantify the isotacticity and regioregularity of polypropylene homopolymers.

[0241] By using the BrukerAdvanceIII400 NMR spectrometer, the 1 H and 13 Operate at 400.15MHz and 100.62MHz of C, and record quantitative 13 C{ 1 H} NMR spectrum. by using 13 All spectra were recorded at 125°C with a C-optimized 10mm extension temperature probe using nitrogen for all pneumatics.

[0242] For polypropylene homopolymer, dissolve approximately 200 mg of material in 1,2-tetrachloroethane-d 2 (TCE-d 2 )middle. To ensure a homogeneous solution, after initial sample preparation in a heating block, the NMR tubes were further heated in a...

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Abstract

The present invention relates to a polypropylene homopolymer, a process for the preparation of such polypropylene homopolymer and a polypropylene blend comprising such polypropylene homopolymer as well as a pipe, sheet, film, fiber, moulded article or extrusion coating comprising such polypropylene homopolymer or polypropylene blend.

Description

technical field [0001] The present invention relates to a polypropylene homopolymer, a process for the preparation of the polypropylene homopolymer and a polypropylene blend comprising the polypropylene homopolymer and a pipe comprising the polypropylene homopolymer or polypropylene blend , film, sheet, fiber, molding or extrusion coating. Background technique [0002] In practice, metallocene catalysts are used in the manufacture of polyolefins such as polyethylene and polypropylene. Numerous academic and patent publications describe the use of these catalysts in olefin polymerization. Metallocenes are now used industrially and polyethylene and polypropylene in particular are often produced using cyclopentadienyl-based catalyst systems with different substitution patterns. [0003] In particular, by using homolog-specific C 2 Symmetric metallocene-prepared polypropylenes offer different microstructures. The most notable difference is the presence of regio-defects in met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/6592
CPCC08F110/06C08F4/65927C08F2500/01C08F2500/15C08L23/12C08L2203/12C08L2203/16C08L2203/18C08L2205/025F16L9/12
Inventor L·雷斯科尼K·赖歇尔特
Owner BOREALIS AG