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Radiation cross-linked flame-retardant coating composition for cables

A radiation crosslinking and composition technology, which is applied in the field of radiation crosslinking flame retardant coating composition, can solve the contradiction between mechanical properties and flame retardant properties, formula composition and thermal aging properties, antioxidant system and radiation crosslinking effect. Contradictions and other problems, to achieve the effect of excellent flame retardancy

Inactive Publication Date: 2017-01-18
宁波国海电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a complex system of halogen-free flame retardant, radiation crosslinking, and high temperature resistance, there are the following contradictions: the contradiction between formula composition and thermal aging performance; the contradiction between antioxidant system and radiation crosslinking effect; mechanical properties and flame retardant performance contradiction

Method used

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  • Radiation cross-linked flame-retardant coating composition for cables
  • Radiation cross-linked flame-retardant coating composition for cables
  • Radiation cross-linked flame-retardant coating composition for cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adjust the control voltage of the front and back rolls of the double roll to 150V, keep it for 1 hour, increase the roll temperature to 130°C, add 40 parts by weight of EVA1 (base resin, VA content of 15%) and 20 parts by weight of EVA2 (base resin, The VA content is 30%) and the smelting is started for about 1 minute, and then 40 parts by weight of magnesium hydroxide are added for smelting for about 3 minutes, and then the sheet is pulverized with a pulverizer to obtain a flame-retardant masterbatch.

[0025] Add basic resins such as flame retardant masterbatch and EVA into a high-speed mixer, add a small amount of white oil, stir for about 15 seconds, and then add thiophenol antioxidant-1# (from Great Lakes Company, USA), fully stir and discharge the material, add The molten sensitizer is stirred evenly.

[0026] Add uniformly mixed materials into the extruder, and control the barrel temperature of the extruder to: 1800°C (feeding port), 220°C, 225°C, 220°C, 210°C (head),...

Embodiment 2

[0031] A radiation crosslinked flame-retardant coating composition was prepared in the same manner as in Example 1, except that no radiation crosslinked sensitizer was used, and the radiation crosslinked sensitizer had the following structure:

[0032]

[0033] Then use the same method to test. As a result, the oxygen index was less than 23, the tensile strength was 18.4, and the elongation at break was 570%. The temperature resistance of the sample is poor.

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Abstract

The invention provides a radiation cross-linked flame-retardant coating composition for cables. The radiation cross-linked flame-retardant coating composition comprises a base resin, a thiophenol antioxidant and a flame retardant, wherein the flame retardant is a halogen-free flame retardant. The invention also provides a method of preparing the above radiation cross-linked flame-retardant coating composition. The radiation cross-linked flame-retardant coating composition provided by the invention is excellent in flame retardancy (represented by oxygen index), mechanical property and high temperature resistance.

Description

Technical field [0001] The invention relates to the field of cables, and more specifically to a radiation crosslinked flame-retardant coating composition for cables. Background technique [0002] Polyolefin is favored by the wire and cable industry for its excellent electrical insulation, good chemical resistance, and good processing performance. It is widely used in wire and cable insulation and sheathing materials. However, polyolefin is very flammable and emits a lot of smoke when burned. Therefore, the flame retardant problem of wires and cables has attracted worldwide attention, and the flame retardant standards for wires and cables have been formulated. With the development of cable flame-retardant technology and a deep understanding of wire and cable fire accidents, the user departments have higher and higher requirements for the flame-retardant of the cable, and put forward new requirements for the flame-retardant in the form of legislation, which requires the use of The...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K3/22C08K5/315
CPCC08L23/0853C08K2201/003C08L2201/02C08L2201/08C08L2201/22C08L2203/202C08L2205/025C08L2205/03C08L2312/06C08K2003/2224C08K5/315
Inventor 许彬冰
Owner 宁波国海电子有限公司
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