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Halogen-free inflaming retarding insulating material of nuclear cable and cable insulating layer as well as preparation method and application thereof

A technology of flame retardant insulating layer and insulating material, applied in the direction of insulated conductors, insulated cables, cables, etc., can solve the problems of poor radiation resistance, unsatisfactory halogen-free flame retardant properties, etc., and achieve stable radiation resistance and electrical properties. performance, suppressing damage, and prolonging service life

Active Publication Date: 2013-03-06
青岛中科汉缆高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the defects of long-term thermal aging, poor radiation resistance, and unsatisfactory halogen-free flame-retardant performance of existing insulating materials, and provide a method for preparing nuclear-use halogen-free flame-retardant insulating materials and cable insulating layers. and applications, the insulating material has stable radiation resistance and electrical properties, good flame retardant properties, and low smoke, halogen-free, low toxicity

Method used

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  • Halogen-free inflaming retarding insulating material of nuclear cable and cable insulating layer as well as preparation method and application thereof
  • Halogen-free inflaming retarding insulating material of nuclear cable and cable insulating layer as well as preparation method and application thereof
  • Halogen-free inflaming retarding insulating material of nuclear cable and cable insulating layer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Synthesis of polyphosphazene flame retardant hexaphenoxycyclotriphosphazene:

[0072] The specific operation process is:

[0073] 1), Preparation of phenol sodium salt: In a 20L glass reactor, under nitrogen protection, add 2kg phenol, 10L chlorobenzene, 200g polyethylene glycol, 45% sodium hydroxide solution, which contains 2.0mol of sodium hydroxide , the reaction temperature is 120-130°C, and the reaction time is 8-12 hours. After the reaction is completed, the water is separated by azeotropic distillation, and the reactant is cooled to room temperature for use.

[0074] 2), the preparation of hexaphenoxycyclotriphosphazene: in step 1) in the phenol sodium salt prepared, under nitrogen protection, add the 30% chlorobenzene solution that contains the hexachlorocyclotriphosphazene of commercially available 1.16kg, in React at 130-132°C for 6-12 hours, cool, filter, distill the filtrate under reduced pressure, recover the solvent chlorobenzene, add hot ethanol to the r...

Embodiment 2

[0076] raw material:

[0077]

[0078] Wherein, the polyphosphazene flame retardant used is the hexaphenoxycyclotriphosphazene prepared in Example 1.

[0079] Steps:

[0080] Put low-density polyethylene, EPDM rubber, antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride, magnesium hydroxide, hexaphenoxycyclotriphosphazene and environmentally friendly red masterbatch into 10 In the internal mixer, add high phenyl silicone rubber, zinc stearate, triallyl isocyanurate (TAIC) and mix for 10 minutes when the internal mixer reaches 145°C, turn over the internal mixer, and pour the material into hoist up to Single-screw extruder, extruded and granulated at 120-160°C, air-cooled to obtain halogen-free flame-retardant insulating material.

Embodiment 3

[0082] raw material:

[0083]

[0084] Wherein, the polyphosphazene flame retardant used is the hexaphenoxycyclotriphosphazene prepared in Example 1.

[0085] Steps:

[0086] Low-density polyethylene, ethylene-octene copolymer, antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride, magnesium hydroxide, aluminum hydroxide, hexaphenoxycyclotriphosphazene and environmentally friendly yellow Put the masterbatch into a 10-liter internal mixer, add high-phenyl silicone rubber, zinc stearate, calcium stearate, triallyl isocyanurate (TAIC) and mix for 10 minutes when the internal mixer reaches 145°C , turn over the internal mixer, pour the material into the elevator and lift it to Single-screw extruder, extruded and granulated at 120-160°C, air-cooled to obtain halogen-free flame-retardant insulating material.

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Abstract

The invention discloses a halogen-free inflaming retarding insulating material of a nuclear cable and a cable insulating layer as well as a preparation method and an application thereof. The halogen-free inflaming retarding insulating material of the nuclear cable comprises raw materials as follows: a polymer substrate comprises the components of: 100 parts of low-density polyethylene and ethylene propylene diene monomer; an inorganic flame retardant comprises the component of: 70-100 parts of magnesium hydroxide; a polyphosphazene flame retardant comprises the component of: 10-20 parts of hexaphenoxycyclotriphosphazene; a compound antioxidant comprises the components of: 4-8 parts of a main antioxidant, an auxiliary antioxidant and an ultraviolet absorbent; an anti-irradiation agent comprises the components of: 5-15 parts of an anti-irradiation agent A and an anti-irradiation agent B; a machining auxiliary agent comprises the components of: 4-10 parts of a cross-linking sensitizer and a lubricating agent, wherein the anti-irradiation agent A is high phenyl silicone rubber and / or phenylene silicone rubber; and the anti-irradiation agent B is boron carbide and / or boron nitride. The insulating material has the stable irradiation performance and electric performance, and good inflaming retarding performance, and is low-smoke, halogen-free and low-toxin.

Description

technical field [0001] The invention relates to a preparation method and application of a halogen-free flame-retardant insulating material for nuclear cables and a cable insulating layer. Background technique [0002] The third generation of nuclear power, such as the AP1000 nuclear power unit of the US company Xiwu, has been built in a large number in our country. For the overall and long-term development of my country's science and technology, the Chinese Academy of Sciences proposed a strategic pilot technology project, the development of future advanced nuclear fission energy (fourth generation) - thorium-based molten salt reactor nuclear energy system (TMSR). Regardless of whether it is a third-generation or fourth-generation nuclear energy system, the insulation and sheath materials of nuclear power cables and cable accessories must have excellent long-term thermal aging performance (the long-term service life of the first and second-generation nuclear power units is 4...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/16C08L83/04C08K13/02C08K3/22C08K5/5399C08K5/134C08K5/3475C08K3/38H01B7/295H01B7/17
Inventor 张聪李景烨李林繁蒋海青黄卫兵张阔
Owner 青岛中科汉缆高分子材料有限公司
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