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Halogen-free red phosphorus-free flame-retardant heat shrinkage material, heat shrinkage tube and preparation method and application

A heat shrinkable, inorganic flame retardant technology, used in conductors, electrical components, circuits, etc., can solve the problems of narrow application range, poor mechanical properties, and unsatisfactory halogen-free flame retardant properties.

Active Publication Date: 2014-11-19
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the defects of long-term thermal aging of heat-shrinkable materials used in conventional nuclear power plants, unsatisfactory halogen-free flame-retardant properties, poor mechanical properties, low elongation at break, and narrow application range, etc., and provide a halogen-free Preparation method and application of red phosphorus flame-retardant heat-shrinkable material and heat-shrinkable tube. The shrinkable material prepared by the 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 red phosphorus-free flame-retardant heat shrinkage material, heat shrinkage tube and preparation method and application
  • Halogen-free red phosphorus-free flame-retardant heat shrinkage material, heat shrinkage tube and preparation method and application
  • Halogen-free red phosphorus-free flame-retardant heat shrinkage material, heat shrinkage tube and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Synthesis of polyphosphazene flame retardant hexaphenoxycyclotriphosphazene:

[0080] The specific operation process is:

[0081] 1), the preparation of sodium phenolate: in a 50L stainless steel reaction kettle, add 5Kg phenol, 25L chlorobenzene, 500g polyethylene glycol, 45% sodium hydroxide solution under nitrogen protection, which contains 5.0mol 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.

[0082] 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 3.0Kg under nitrogen protection, in React at 130-132°C for 6-12 hours, cool, filter, distill the filtrate under reduced pressure, recover the solvent chlorobenzene, a...

Embodiment 2

[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-ethyl acrylate copolymer (EEA), antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride, magnesium hydroxide, melamine cyanurate (MCA) , polyphosphazene flame retardant hexaphenoxycyclotriphosphazene, and environmentally friendly yellow masterbatch, put them into a 55-liter internal mixer, and when the internal mixer reaches 130°C, add 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 hoist and raise to Two-stage twin-screw extruder, extruding and granulating at 110-150°C, and air-cooled to obtain a yellow halogen-free and red phosphorus-free flame-retardant heat-shrinkable material.

Embodiment 3

[0090] raw material:

[0091]

[0092] Wherein, the polyphosphazene flame retardant used is the hexaphenoxycyclotriphosphazene prepared in Example 1.

[0093] Steps:

[0094] The compatibilizer EVA-g-MAH, ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), antioxidant 1010, antioxidant DLTP, ultraviolet UV328, boron nitride, hydrogen Magnesium oxide, melamine cyanurate (MCA), polyphosphazene flame retardant hexaphenoxycyclotriphosphazene, and environmentally friendly yellow masterbatch are put into a 55-liter internal mixer, and when they are mixed to 130°C, Add high phenyl silicone rubber (40% phenyl content), zinc stearate, triallyl isocyanurate (TAIC), knead for 10 minutes (mixing temperature 120-140°C), turn over and knead machine, pour the material into the hoist and lift it to Two-stage twin-screw extruder, extruding and granulating at 110-150°C, and air-cooled to obtain a yellow halogen-free and red phosphorus-free flame-retardant hea...

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Abstract

The invention discloses a halogen-free red phosphorus-free flame-retardant heat shrinkage material, a heat shrinkage tube and a preparation method and application. The heat shrinkage material comprises the following raw materials: 100 parts of polymer base materials including ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer in radiation grafting with maleic anhydride, 120-160 parts of inorganic flame retardant including magnesium hydroxide, 15-30 parts of polyphosphazene flame retardant including hexaphenoxy cyclotriphosphazene, 15-30 parts of nitrogen flame retardant including melamine cyanurate, 4-8 parts of composite antioxidants including a main antioxidant, an auxiliary antioxidant and an ultraviolet light absorber, 5-15 parts of anti-radiation agents including high-phenyl silicon rubber and anti-radiation agent A, and 6-12 parts of processing aids including a crosslinking sensitizer and a lubricant, wherein the anti-radiation agent A is boron carbide and / or boron nitride. The shrinkage material provided by the invention has excellent performance, good flame retardation and stable radiation resistance, electric performance and mechanical performance.

Description

technical field [0001] The invention relates to a preparation method and application of a halogen-free and red phosphorus-free flame-retardant heat-shrinkable material and a heat-shrinkable tube. 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 un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L53/00C08L51/00C08L83/04C08K13/02C08K3/22C08K5/3492C08K5/134C08K5/372C08K5/3475C08K3/38C08K5/103C08K5/098C08K5/5399B29B9/06H01B7/17H01B7/295
Inventor 张聪李景烨李林繁蒋海青黄卫兵张阔
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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