Radiation-resistant halogen-free flame-retardant cable material and preparation method thereof

Abstract

The invention discloses a radiation-resistant halogen-free flame-retardant cable material and a preparation method thereof. The radiation-resistant halogen-free flame-retardant cable material is mainly prepared from the following components in parts by weight: 100 parts of EPDM (ethylene propylene diene monomer) rubber, 70-150 parts of metal hydroxide fire retardant, 5-15 parts of nanometer hydrotalcite, 2-10 parts of red phosphorus, 2-5 parts of surface treating agent, 4-8 parts of zinc oxide, 5-10 parts of boron nitride, 9-28 parts of macromolecular antiradiation agent, 0.5-2 parts of stearic acid, 0.5-3 parts of paraffin, 0.2-1.0 part of 2-mercapto benzimidazole, 3-6 parts of 1,1-di-tert-butyl peroxide-3,3,5-trimethyl cyclohexane, and 0.2-1.0 part of 2,2,4-trimethyl-1,2-dihydro quinoline. The radiation-resistant halogen-free flame-retardant cable material overcomes the defects such as poor radiation resistance and poor durability of the existing cable material; the nanometer hydrotalcite with aluminum hydroxide and magnesium hydroxide are integrated to serve as a composite flame retardant; the surface of the flame retardant is modified to promote the dispersibility in the cable material; the processability and the flame resistance of the cable material are improved.

Description

technical field [0001] The invention relates to the field of polymer materials for wires and cables, in particular to a radiation-resistant, halogen-free, flame-retardant cable material and a preparation method thereof. Background technique [0002] With the rapid increase of energy demand in the world, the development and use of nuclear energy as an alternative energy source has attracted widespread attention from all countries in the world. Although countries around the world have taken a more cautious attitude towards the use and development of nuclear energy since the Fukushima nuclear power plant accident in 2011, as advocated by the Generation IV Nuclear Energy System International Forum, we need to continuously innovate the design of nuclear power plants to meet more High safety requirements and increased energy efficiency. On this basis, the further development of nuclear energy applications will play a very important and positive role in solving the energy crisis a...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the poor radiation resistance of existing cable materials by selecting high molecular polymers with good comprehensive properties as the cable matrix material and adding a variety of composite large molecular weight radiation-resistant additives with better compatibility with the basic rubber. Strong, poor durability and other shortcomings; use nano-hydrotalcite with aluminum hydroxide and magnesium hydroxide as a composite flame retardant, and modify the surface of the flame retardant to promote its dispersion in the cable material and improve the cable material. Processability and flame retardancy, thereby obtaining a low-smoke halogen-free flame-retardant cable material with excellent radiation resistance and its preparation method

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