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Silicon alkyl cross bonding polyethylene fire-retardancy insulating plastics

A flame-retardant polyethylene and silane cross-linking technology, which is applied in the field of polyethylene insulating plastics, can solve problems such as easy combustion, and achieve the effects of good electrical performance, expanded application range, and high mechanical strength

Inactive Publication Date: 2003-12-31
上海高分子功能材料研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of silane cross-linked polyethylene in the development and application is that it is easy to burn. The oxygen index of pure polyethylene is 18, and the oxygen index of polyethylene modified by silane grafting is reduced to 16, which undoubtedly limits some high fire protection requirements. The possibility of using silane crosslinking materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Example 1 is used for an insulating layer with an oxygen index of about 28 and high mechanical strength. Such as: nuclear power plants, high-rise buildings and other occasions, the wires are required to have a certain flame retardant performance, and the temperature resistance of the wires is below 90 °C.

example 2

[0035] Example 2, used in occasions where the oxygen index is around 30 and the mechanical strength is moderate.

example 3

[0036] Example 3, suitable for wire and cable insulation layers and sheaths where the temperature resistance is below 125°C and the oxygen index is above 30.

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Abstract

The present invention is one silane-crosslinked fireproof insulating polyethylene material for the insulating layer of wire and cable. It consists of polyethylene 100 (in weight portions, the same below), silane crosslinking agent 0.8-2.5, lubricant 1.5-5.0, bromine fire retardant 10-100, antioxidant 0.02-2 and metal deactivator 0.05-1.0. The plastic of the present invention has oxygen index over 30 to ensure fire retarding requirement. It is produced through two steps including the preparation of silane grafted material and the preparation of fire retarding mother material. When used, the silane grafted material and the fire retarding mother material are mixed. The present invention has the advantages of high fireproof performance, high mechanical performance, good electrical performance and excellent heat performance, and is suitable for use in insulating layer of wire and cable, corrugated pipe in automobile, etc.

Description

technical field [0001] The invention relates to a polyethylene insulating plastic used for insulating layers of electric wires and cables, automobile bellows and conduits, in particular to a silane cross-linked flame-retardant polyethylene insulating plastic. Background technique [0002] XLPE insulating material has the characteristics of good heat resistance, strong load capacity, non-melting, corrosion resistance, high mechanical properties, excellent electrical properties, no toxic gas and smoke when burned, and no carcinogenic lead stabilizers. It is used to replace traditional PVC insulation materials in more and more wire and cable manufacturing. The application of cross-linking technology has greatly improved the maximum service temperature and environmental stress cracking resistance of cables. However, the disadvantage of silane cross-linked polyethylene in the development and application is that it is easy to burn. The oxygen index of pure polyethylene is 18, and ...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08K5/54C08L23/06
Inventor 穆肖斌项华丽张建萍吴国森
Owner 上海高分子功能材料研究所
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