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Semiconductive polyolefin composition

A semi-conductive, polyolefin technology, used in conductive coatings, circuits, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of sacrificing processing speed and low melting point, and achieve high elasticity and flexibility. Effect

Inactive Publication Date: 2013-03-20
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

Also in this embodiment, the melting point is too low due to the high comonomer content of the ethylene copolymer, so that the above-mentioned drawbacks in the crosslinking step apply and the processing speed must be sacrificed

Method used

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  • Semiconductive polyolefin composition
  • Semiconductive polyolefin composition
  • Semiconductive polyolefin composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0166] Polyolefin (I) of semiconductive composition for reference: Terpolymer 1 (for reference)

[0167] Preparation of terpolymer 1 by high-pressure polymerization using free radical initiation, wherein under the action of a free radical initiator, ethylene monomer is made in a reactor under high pressure of about 120 to 350 MPa and elevated temperature of 150 to 350°C with vinyltrimethoxysilane (VTMS) and butyl acrylate (BA) comonomers in order to obtain a final terpolymer 1 with a silane content of 1.8 wt% (0.36 mol%) and 17 wt% (4.4 mol%) ) BA content. When the reaction is complete, the temperature and pressure are reduced, and the resulting unsaturated polymer is recovered.

[0168] Polyolefin (I) of the semiconductive composition of the present invention: terpolymer 2

[0169] Terpolymer 2 was prepared as described in Terpolymer 1, but the (co)monomer feed was adjusted in a known manner to obtain a silane content of 2.0 wt% (0.37 mol%) and a BA content of 8 wt% ( 1.9 ...

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Abstract

The present invention relates to a semiconductive polyolefin composition comprising: (i) up to 80 wt.% of a polyolefin (I), (ii) carbon black, and (iii) optionally up to 60 wt.% of a polymer (II) having a melting point of not less than 100 °C, wherein the polyolefin (I) has a co-monomer content of equal to or less than 4.3 mol%, to the use of that composition for the production of a power cable and to a power cable comprising that composition.

Description

technical field [0001] The present invention relates to semiconductive polyolefin compositions which provide excellent mechanical properties and processability. The invention also relates to a process for the manufacture of the semiconductive polyolefin composition and its use in semiconductive layers of power cables. Background technique [0002] Typically, medium and high voltage power cables comprise at least a first semiconducting layer, an insulating layer and a second semiconducting layer applied in succession to a conductor, for example made of aluminum or copper. The first and second semiconducting layers can be made of the same or different materials. Such semiconducting layers are generally crosslinkable so that they can be crosslinked or not as the case requires. [0003] Also, the second semiconductive layer may be bonded to the insulating layer or peelable from the insulating layer. Such a peelable layer can in principle be crosslinked or not. [0004] The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/44H01B1/24C08K3/04
CPCC08K2201/001C08L23/06H01B1/24C08L23/142C09D5/20C08L2203/202C08K3/04C09D5/24C08L23/0892C08L23/10Y10T428/2929B29C48/022C08L2666/06H01B9/006
Inventor 奥拉·法格雷尔安·沃特森
Owner ボレアリステクノロジーオイ