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Pipes comprising beta-nucleated propylene copolymers

A propylene copolymer and pipe technology, which is used in the preparation of molded products and pipes, can solve problems such as strict requirements and inability to meet pipes and so on.

Active Publication Date: 2010-03-31
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although α-nucleated propylene polymers provide satisfactory properties for many applications, they do not meet the more stringent requirements for pipes used for hot water pipes or for transporting pressurized fluids

Method used

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  • Pipes comprising beta-nucleated propylene copolymers
  • Pipes comprising beta-nucleated propylene copolymers
  • Pipes comprising beta-nucleated propylene copolymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] Using commercially available Ziegler-Natta catalyst (MgCl 2 The supported titanium tetrachloride catalyst) polymerizes the propylene-butene copolymer in the monomer suspension.

[0089] The polymerization reaction is continuously performed in the pre-polymerization reactor and the main polymerization reactor. The temperature, pressure, catalyst-, monomer- and hydrogen feed during the polymerization step and the polymer concentration in the main reactor are kept constant. The concentration of hydrogen in the liquid monomer mixture is continuously monitored by gas chromatography analysis. The relevant processing parameters are listed below:

[0090] The first polymerization step was carried out in a small reactor equipped with a stirrer and a cooling system, in which an excess liquid mixture of propylene monomer and 1-butene monomer was prepolymerized at 20°C for 9 minutes. The catalyst components and the cocatalyst triethylaluminum (TEAL) and cyclohexylmethyldimethoxysilane...

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Abstract

The present invention concerns a propylene copolymer composition, a molded article comprising the composition and the use of the propylene copolymer composition for preparing molded articles, preferably pipes.

Description

Technical field [0001] The present invention relates to a propylene copolymer composition, a molded article containing the composition, and the use of the propylene copolymer composition for preparing molded articles, especially pipes. Background technique [0002] Polymer materials are often used to prepare pipes for various purposes, such as fluid transportation, that is, to transport liquids or gases, such as water or natural gas. The fluid can be transported or pressurized under normal pressure. The fluids transported in this way may have different temperatures, usually in the temperature range of 0°C to 70°C. The above-mentioned pipe is preferably made of polyolefin, usually polyethylene or polypropylene. [0003] Specifically, if hot water is to be transported or pressurized fluids are to be transported, polymer materials such as polyolefins are generally considered unsuitable for pipes. For fluids as described above, the pipe must withstand strains associated with high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08K5/00
CPCC08F210/08C08F2500/11C08F2500/12C08K5/0083C08F210/06Y10T428/1393Y10T428/139Y10T428/1352C08F4/6543C08L23/10
Inventor 于尔根·埃米希卡尔·埃布纳弗伦茨·图姆
Owner ボレアリステクノロジーオイ