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Low voltage power cable with insulation layer comprising polyolefin having polar groups, hydrolysable silane groups and which includes silanol condensation

A low-voltage power, polar group technology, applied in the direction of power cables, insulated cables, organic insulators, etc., can solve problems such as mechanical property damage, and achieve the effects of preventing fracture, increasing elongation at break, and enhancing elongation at break

Active Publication Date: 2006-11-29
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

However, when this thin polyolefin layer is extruded towards a cold conductor, its mechanical properties are severely compromised
For this reason, preheated conductors are usually used when extruding polyolefin-containing insulation on conductors, however, this is a disadvantage compared to materials such as PVC

Method used

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  • Low voltage power cable with insulation layer comprising polyolefin having polar groups, hydrolysable silane groups and which includes silanol condensation
  • Low voltage power cable with insulation layer comprising polyolefin having polar groups, hydrolysable silane groups and which includes silanol condensation

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Experimental program
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Embodiment Construction

[0069] 1. Composition for insulating layer preparation

[0070] a) Polymer A (comparative) is an ethylene copolymer containing 0.23 mol % (1.25 wt %) of vinyltrimethoxysilane (VTMS) which has been obtained by free radical copolymerization of ethylene monomer and VTMS comonomer. Polymer A has 922kg / m 3 density and MFR of 1.00g / 10min 2 (190°C, 2.16 kg).

[0071] b) Polymer B (comparative) is an ethylene copolymer containing 0.25 mol% (1.3 wt%) of vinyltrimethoxysilane (VTMS), obtained in the same way as polymer A. Polymer B has 925kg / m 3 density and MFR of 1.1g / 10min 2 (190°C, 2.16 kg).

[0072] c) Polymer C is an ethylene copolymer containing 0.25 mol % (1.3 wt %) of vinyltrimethoxysilane (VTMS) and 0.33 mol % (1.5 wt %) of butyl acrylate (BA), except during polymerization It was obtained in the same manner as polymer A except that butyl acrylate comonomer was added. Polymer C has 925kg / m 3 density and MFR of 0.9g / 10min 2 (190°C, 2.16 kg).

[0073] d) Polymer D is an ...

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Abstract

The present invention relates to a low voltage power cable comprising an insulation layer with a density below 1100 kg / m<3> which comprises a polyolefin comprising 0.02 to 4 mol% of a compound having polar groups and further comprises a compound having hydrolysable silane groups and include 0.0001 to 3 wt.-% of a silanol condensation catalyst. Furthermore, the present invention relates to a process for the production of said low voltage power cable and to the use of a polyolefin comprising 0.02 to 4 mol% of a compound having polar groups in the production of an insulation layer for a low voltage power cable.

Description

technical field [0001] The present invention relates to a low-voltage power cable comprising an insulating layer comprising a polyolefin having polar groups and hydrolyzed silane groups, and a silanol condensation catalyst used for its preparation, and to said polyolefin Use in the preparation of insulation for low-voltage power cables. Background technique [0002] Power cables for low voltages, ie voltages below 6 kV, generally comprise electrical conductors covered by an insulating layer. Such cables are hereinafter referred to as single-wire cables. Optionally, two or more of such single wire cables may be surrounded by a common outermost jacket layer, or jacket. [0003] Insulation layers for low voltage power cables are typically made from polymer compositions comprising polymer matrix resins such as polyolefins. A material commonly used as matrix resin is polyethylene. [0004] Furthermore, in the final cable, the polymer matrix resin is usually cross-linked. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/44
CPCH01B3/441H01B3/447H01B9/00H01B7/02
Inventor 约纳什·容奎斯特伯恩特·奥克-苏丹瓦尔夫·德特勒夫
Owner ボレアリステクノロジーオイ