Polyolefin semiconductive composite for organosilane crosslinked overhead cables with rated voltage of less than or equal to 20KV

A silane cross-linking, overhead cable technology, applied in the direction of insulated cables, cables, conductors, etc., can solve the problem of not realizing industrialized production, and achieve the effects of improving product quality, reducing production costs, and simplifying production processes

Active Publication Date: 2011-07-27
JIANGSU DEWEI ADVANCED MATERIALS
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Problems solved by technology

The semi-conductive shielding material used for silane cross-linked overhead cables of 20KV and below has not been industrialized in China at present, and the inner

Method used

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  • Polyolefin semiconductive composite for organosilane crosslinked overhead cables with rated voltage of less than or equal to 20KV
  • Polyolefin semiconductive composite for organosilane crosslinked overhead cables with rated voltage of less than or equal to 20KV
  • Polyolefin semiconductive composite for organosilane crosslinked overhead cables with rated voltage of less than or equal to 20KV

Examples

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Embodiment 5

[0021] In Example 5, LDPE:LLDPE=75:25.

[0022] In an embodiment, the second antioxidant in the superconducting masterbatch B containing π bonds is selected from tetrakis[β-(3,5-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester, tetrakis A mixture of [β-(3,5-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and three (2,4-di-tert-butylphenyl) phosphite, the ratio of the two is (1 ~2): 1, preferably IRGANOX B225, IRGANOX B215.

[0023] The second lubricant in the superconducting masterbatch B containing π bonds is dimethyl silicone oil or white oil.

[0024] In Examples 1, 2 and 3, the π superconducting carbon black contained in the superconducting masterbatch B containing π bonds is JE6900, and that in Examples 4 and 5 is VXC200.

[0025] The production process of the superconducting masterbatch B containing π bonds is as follows: polyolefin resin, second antioxidant, second lubricant, and superconducting carbon black containing π bonds are mixed ac...

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Abstract

The invention discloses a polyolefin semiconductive composite for organosilane crosslinked overhead cables with a rated voltage of less than or equal to 20KV, which comprises a base stock A and a superconductive parent stock B having pi bonds, wherein the weight ratio of the base stock A and the superconductive parent stock B is 100:(20-40). The base stock A comprises the following components in part by weight: 100 parts of polyolefin resin, 3 to 6 parts of first antioxygen, 1.0 to 3.0 parts of first lubricant, and 0.1 to 0.5 part of fatty acid salt. The superconductive parent stock B having pi bonds comprises the following component in part by weight: 100 parts of polyolefin resin, 1.0 to 5.0 parts of second antioxygen, 1.0 to 3.0 parts of second lubricant and 40 to 60 parts of superconductive carbon black having pi bonds. In the preparation process of the composite, the components are mixed uniformly. The composite has the advantage that the performance of products of the same purpose which need to be crosslinked can be achieved without a crosslinking process. The polyolefin semiconductive composite is particularly suitable to be used as a semiconductor shielding material for the organosilane crosslinked overhead cables with a rated voltage of 20KV or below.

Description

technical field [0001] The invention relates to a polyolefin semiconductive compound used for silane cross-linked aerial cables of ≤20KV. Its mechanical properties and electrical properties are comparable to those of crosslinked semiconductive composites. In the process of preparing semiconductive composites without crosslinking polyolefins, polyolefin resins and a kind of superconducting carbon black containing π bonds, stearin salts, lubricants, etc. The composition is mainly used in the production of low-voltage (20kV and below) silane crosslinked overhead cables, and is used as a semiconductive shielding material for 20KV and below silane crosslinked overhead cables. Background technique [0002] At present, the Chinese market has a huge demand for low-voltage cables and overhead cables. The insulation of such cables has basically been converted from PVC materials in the past to silane cross-linked polyethylene. The semi-conductive shielding material used for silane cr...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08K13/02C08K3/04C08K5/098B29C47/92H01B7/17B29C48/92
CPCB29C48/397
Inventor 顾金云张建耀戴红兵张丽本陈敏李小刚
Owner JIANGSU DEWEI ADVANCED MATERIALS
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