A new crosslinked low MFR polymer composition, power cable insulation and power cable

A technology for power cables and compositions, applied in the field of cross-linked polymer compositions, capable of solving problems such as heat dissipation of insulating materials

Active Publication Date: 2016-08-03
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second problem is the fact that leakage currents flowing between the inner semiconducting layer and the outer semiconducting layer create heat inside the insulation
Under high voltage / high temperature conditions, the high electrical conductivity of the insulating material can even lead to heat dissipation

Method used

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  • A new crosslinked low MFR polymer composition, power cable insulation and power cable
  • A new crosslinked low MFR polymer composition, power cable insulation and power cable

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Embodiment Construction

[0017] The present invention provides a crosslinked polymer composition obtained by crosslinking a polymer composition having a melt flow rate (MFR) of less than 1.7 and comprising polyolefin, peroxide and sulfur-containing antioxidants, characterized in that the crosslinked polymer composition has an oxidation induction time corresponding to Z minutes, determined with differential scanning calorimetry (DSC) according to ASTM-D3895, ISO / CD11357 and EN728 , and includes peroxide by-products in amounts corresponding to Wppm as determined by HPLC according to BTM2222, where

[0018] Z 1 ≤Z≤Z 2 , W 1 ≤W≤W 2 ,and

[0019] W≤p-270*Z, where

[0020] Z 1 is 0, Z 2 60, W 1 is 0 and W 2 is 9500, and p is 18500.

[0021] The crosslinked polymer composition comprises polyolefin and peroxide by-products in amounts as defined above, below or in the claims, and has an oxidation induction as defined above, below or in the claims time. The crosslinked polymer composition is crossli...

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Abstract

The invention discloses a new crosslinked low MFR polymer composition, a power cable insulation and a power cable, and relates to use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications. The crosslinked polymer composition is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of at least 1.7 and comprises a polyolefin, peroxide and sulphur containing antioxidant, characterized by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO / CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z1 <= Z <= Z2, W1 <= W <= W2, and W <= p - 270 <x> Z, wherein Z1 is 0, Z2 is 60, W1 is 0 and W2 is 9500, and p is 18500.

Description

technical field [0001] The present invention relates to a crosslinked polymer composition, a power cable insulation and a power cable, the polymer composition, the crosslinked polymer composition, the power cable insulation, and the power cable at high voltage ( HV) and extra high voltage (EHV) cable applications such as high voltage direct current (HVDC) applications and extra high voltage direct current (EHVDC) applications may be particularly useful. The invention also relates to the use of the crosslinked polymer composition. Background technique [0002] Polyolefins produced in the high pressure (HP) process are widely used in polymer demanding applications where the polymer must meet high mechanical and / or electrical requirements. For example in power cable applications, especially in medium voltage (MV) and especially in high voltage (HV) and extra high voltage (EHV) cable applications, the electrical properties of the polymer composition are very important. Further...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08K5/14H01B7/02H01B9/00H01B9/04
CPCC08K5/14C08K5/375H01B3/441C08L23/06C08F10/02C08L23/16C08F2500/08C08F2500/12C08F2810/20C08L2203/202C08L2203/206C08K5/005C08K5/01C08K5/36
Inventor 佩尔-奥拉·哈格斯特兰德威尔哥特·恩隆德安尼卡·斯迈德伯格
Owner BOREALIS AG
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