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Polymeric compositions with voltage stabilizer additive

A composition and polymer technology, applied in the direction of circuits, insulated cables, electrical components, etc., can solve problems such as poor compatibility of voltage stabilizers

Active Publication Date: 2014-09-03
UNION CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional voltage stabilizers are poorly compatible with polyolefins

Method used

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  • Polymeric compositions with voltage stabilizer additive
  • Polymeric compositions with voltage stabilizer additive
  • Polymeric compositions with voltage stabilizer additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Example 1 is an LDPE containing 2.9 wt% diphenoxybenzene (mole content equivalent to 2 wt% anthracene), obtained from Sigma Aldrich, made with a mixing temperature of 140°C.

Embodiment 2

[0091] Example 2 is an LDPE containing 2.2 wt% N-benzanilide (mole content equivalent to 2 wt% anthracene), obtained from Sigma Aldrich, made with a mixing temperature of 190°C.

[0092] Comparative sample A is an LDPE compounded at a temperature of 140°C without a voltage stabilizer.

[0093] Comparative Sample B is LDPE compounded at 225°C without voltage stabilizer.

[0094] Comparative Sample C is an LDPE containing 2 wt% anthracene, mixed at a temperature of 225°C.

[0095] Comparative Sample A

[0096] A series of 18 specimens for Comparative Sample A was fitted to a 2-parameter Weibull failure distribution. The data exhibited significant nonlinearity, resulting in poor correlation (r^2 of 0.75). Using offset t0=8.8kV, it is found that the 3-parameter Weber failure distribution is more suitable for describing the failure distribution (r^2 is 0.88) where offset (offset) t0=8.8kV. as in figure 2 As shown in , using a 90% confidence interval spanning 10.7 to 13.7 kV, ...

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Abstract

The present invention discloses polymer compositions having improved breakdown strength. The polymer composition contains a polyolefin and a voltage stabilizer. The voltage stabilizer is diphenoxybenzene and / or N-benzanilide. The polymer composition of the present invention exhibits improved breakdown strength when used as an insulation layer for power cables.

Description

Background technique [0001] Typical power cables include one or more conductors in a cable core surrounded by one or more layers of polymeric material. Medium voltage (6 to 36 kV) and high voltage (above 36 kV) and extra high voltage (above 220 kV) cables typically comprise a core surrounded by a semiconducting inner layer, followed by an insulating layer, then a semiconducting outer layer. [0002] The load capacity of the cable system is limited in part by the heat transfer from the conductor to the outside. Polyolefins, such as polyethylene, are often used in insulating and / or semiconducting layers. Polyethylene has a low dielectric constant and relatively high electrical breakdown strength. [0003] It is well known that voltage stabilizers are used in polyolefin compositions to increase the electrical breakdown strength of the insulation in power cables. However, conventional voltage stabilizers have poor compatibility with polyolefins. Provisions in the art to obtain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/06C08K5/20H01B3/18C09D7/63
CPCC08K5/06C08K5/20H01B3/307H01B3/441C08L23/06C09D7/63C08L23/02C08L23/00H01B3/18C09D123/06H01B7/02
Inventor T·J·珀森
Owner UNION CARBIDE CORP
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