Halogen-free flame retardant sheath material for nuclear cable, cable sheath, preparation method and application

A technology of flame retardant sheath and inorganic flame retardant, which is applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of thermal aging of cable sheath materials, unsatisfactory halogen-free flame retardant properties, and poor mechanical properties.

Active Publication Date: 2013-01-16
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

[0007] The technical problem to be solved by the present invention is to overcome the defects of existing nuclear power plant cable sheath materials such as long-term thermal aging, unsatisfactory halogen-free flame-retardant performance, and poor mechanical properties, and provide a halogen-free flame-retardant sheath material for nuclear cables, The preparation method and application of the cable sheath, the sheath material of the present invention has superior performance, good flame retardant performance, stable radiation resistance performance, electrical performance and mechanical performance

Method used

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  • Halogen-free flame retardant sheath material for nuclear cable, cable sheath, preparation method and application
  • Halogen-free flame retardant sheath material for nuclear cable, cable sheath, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Synthesis of polyphosphazene flame retardant hexaphenoxycyclotriphosphazene:

[0074] The specific operation process is:

[0075] 1), the preparation of phenol sodium salt: in the stainless steel reactor of 100L, add the sodium hydroxide solution of 10Kg phenol, 50L chlorobenzene, 1Kg Polyethylene Glycol, 45% under nitrogen protection, wherein contain the sodium hydroxide of 10mol, The reaction temperature is 120-130° C., and the reaction time is 8-12 hours. After the reaction is completed, azeotropic distillation is carried out to separate water, and the reactant is cooled to room temperature for use.

[0076] 2), the preparation of hexaphenoxycyclotriphosphazene: in step 1) in the phenol sodium salt of preparation, add the 30% chlorobenzene solution that contains the hexachlorocyclotriphosphazene of commercially available 5.8Kg under nitrogen protection, in React at 130-132°C for 6-12 hours, cool, filter, distill the filtrate under reduced pressure, recover the solve...

Embodiment 2

[0078] raw material:

[0079]

[0080] Wherein, the polyphosphazene flame retardant used is the hexaphenoxycyclotriphosphazene prepared in Example 1.

[0081] Steps:

[0082] The compatibilizer EVA-g-MAH, ethylene-methyl methacrylate copolymer (EMMA, antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride, magnesium hydroxide, melamine cyanurate (MCA ), hexaphenoxycyclotriphosphazene and carbon black were put into a 35-liter internal mixer, and when banburying to 130°C, high-phenyl silicone rubber (40% phenyl content, zinc stearate, triallyl Based on isocyanurate (TAIC), after mixing for 10 minutes (mixing temperature 120-140°C), turn over the internal mixer, pour the material into the elevator and raise it to A twin-screw extruder is used to extrude and granulate at 110-150°C, and air-cooled to obtain nuclear power K1 halogen-free flame-retardant sheathing material.

Embodiment 3

[0084] raw material:

[0085]

[0086] Wherein, the polyphosphazene flame retardant used is the hexaphenoxycyclotriphosphazene prepared in Example 1.

[0087] Steps:

[0088] The compatibilizer EVA-g-MAH, ethylene-methyl methacrylate copolymer (EMMA), ethylene-vinyl acetate copolymer (EVA), antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride , magnesium hydroxide, melamine cyanurate (MCA), hexaphenoxycyclotriphosphazene and carbon black were put into a 35-liter internal mixer, and when it was mixed to 130°C, high-phenyl silicone rubber (phenyl Content 40%, zinc stearate, triallyl isocyanurate (TAIC), after mixing for 10 minutes (mixing temperature 120-140 ℃), turn over the internal mixer, pour the material into the elevator and raise it to A twin-screw extruder is used to extrude and granulate at 110-150°C, and air-cooled to obtain nuclear power K1 halogen-free flame-retardant sheathing material.

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Abstract

The invention discloses a halogen-free flame retardant sheath material for a nuclear cable, a cable sheath, and a preparation method and an application of the cable sheath. The halogen-free flame retardant sheath material for the nuclear cable comprises the following raw materials: 100 parts of a polymer base material comprising ethylene vinyl acetate copolymer and ethylene methyl methacrylate copolymer, 100-140 parts of an inorganic fire retardant comprising magnesium oxide, 15-25 parts of phenoxycycloposphazene; 15-30 parts of nitrogen fire retardant comprising melamine cyanurate, 4-8 parts of a compound antioxidant comprising a main antioxidant, an auxiliary antioxidant and an ultraviolet light absorber, 5-15 parts of an anti-radiation agent comprising high phenyl siloxane rubber and an anti-radiation agent A, and 6-12 parts of a processing aid comprising a cross-linking sensitizing agent and a lubricant, wherein the anti-radiation agent A is boron carbide and/or boron nitride. The halogen-free sheath material for the nuclear cable disclosed by the invention is good in superior performance, good fire retardant performance, and stable anti-radiation performance, electrical performance and mechanical performance.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant sheath material for nuclear cables, a cable sheath, a preparation method and application thereof. 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 40 years at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L51/00C08L83/04C08K13/02C08K3/22C08K5/5399C08K5/3492C08K5/10C08K5/134C08K3/38C08J3/28C08J3/24H01B3/44H01B7/17H01B7/295
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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