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Pipe having improved high temperature resistance

A pipe, single active center technology, applied in the direction of rigid pipes, pipes, pipes/pipe joints/fittings, etc., can solve the problem of low pipe flexibility and achieve the effect of simplifying pipe installation

Inactive Publication Date: 2013-01-30
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The result is a relatively low flexibility of the tubing

Method used

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  • Pipe having improved high temperature resistance
  • Pipe having improved high temperature resistance

Examples

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Effect test

Embodiment 1

[0097] to a 50dm 3 Add 32kg / h of propane and 8.3g / h of hydrogen in the loop reactor. The operating temperature was 60°C and the operating pressure was 61 bar.

[0098] The slurry was removed from the reactor and transferred to a 500dm 3 in the loop reactor. The reactor was operated at a temperature of 85°C and a pressure of 58 bar. A single site catalyst prepared as disclosed in Catalyst 3 of Example 5 of EP 1 462 464 was continuously fed into the loop reactor at a rate of 29 g / min. Additional ethylene, 1-butene, propane diluent and hydrogen were continuously fed into the reactor so that the production rate of the polymer was 35 kg / h, and the MFR of the polymer 2 is 110g / 10min and the density of the polymer is 939kg / m 3 .

[0099] The slurry is continuously withdrawn from the reactor to a flash stage which removes hydrocarbons from the polymer. The polymer is then transferred to a gas phase reactor where polymerization continues. The reactor was operated at a temperatu...

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Abstract

The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises c. an ethylene copolymer as fraction (A), and d. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), the base resin having (i) a density of below 940 kg / m, and (ii) a MFR5 at 190 DEG C. / 5.00 kg of at least 0.20 g / 10 min, and the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95 DEG C. and 4.3 MPa.

Description

[0001] This application is a divisional application with the filing date of November 21, 2007, the application number 200780043755.8 (the international application number is PCT / EP2007 / 010093), and the title is "pipe material with improved high temperature resistance". technical field [0002] The present invention relates to a pipe with improved high temperature resistance, and a method for preparing the same, the pipe is made of a polyethylene composition comprising a polyethylene resin formed on a single site catalyst (SSC ) in the presence of a polymerization method. Background technique [0003] Pipes, especially pressure pipes, are used in a variety of applications, such as the transportation of drinking water, sewage, different industrial goods, gases, etc. [0004] Based on the strength of the polymer, polyethylene pipes for pressurized systems can be classified into different types such as PE63, PE80 or PE100. The higher the value, the longer the service life under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06F16L9/12
CPCC08L23/08C08L23/06C08L23/0815C08L2314/06C08L2205/02C08F210/16Y10T428/139C08L2666/06C08F2/001C08F210/08C08F210/14C08F2500/12C08F2500/04C08F2500/17F16L9/12
Inventor 马格纳斯·帕姆洛夫斯劳维·约翰松马尔库·瓦赫泰里
Owner ボレアリステクノロジーオイ
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