CN101531789B - Radiation-resistant halogen-free low smoke flame retardant insulating material for cables of nuclear power plants and preparation method - Google Patents

Radiation-resistant halogen-free low smoke flame retardant insulating material for cables of nuclear power plants and preparation method Download PDF

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Publication number
CN101531789B
CN101531789B CN 200910030927 CN200910030927A CN101531789B CN 101531789 B CN101531789 B CN 101531789B CN 200910030927 CN200910030927 CN 200910030927 CN 200910030927 A CN200910030927 A CN 200910030927A CN 101531789 B CN101531789 B CN 101531789B
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rubber
nuclear power
low smoke
cables
smoke flame
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CN101531789A (en
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王巧娥
房权生
庞玉春
王永
梁彤祥
郭文利
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Baosheng Science and Technology Innovation Co Ltd
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Baosheng Science and Technology Innovation Co Ltd
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Abstract

The invention discloses a radiation-resistant halogen-free low smoke flame retardant insulating material for cables of nuclear power plants and a preparation method. The radiation-resistant halogen-free low smoke flame retardant insulating material is prepared from the following raw materials: ethylene propylene diene rubber, phenyl siloxane rubber, magnesium hydrate, aluminium hydroxide, zinc borate, white carbon black, cerium dioxide, zinc oxide, Bis(tert-butyldioxyisopropyl)benzene, tri allyl cyanurate, 2-mercaptobenzimidazole, 2,2,4-trimethyl-1,2-dihydroquinoline, Aflux A-25, stearic acid, vinyl tris(beta-methoxyethoxy) silane, and paraffin oil by heating and mixing. The formulation and the mixture ratio are scientific and reasonable, and the process is advanced. The prepared insulating material has good radiation resistance, excellent mechanical property, good electrical property and long service life, and is a good radiation-resistant halogen-free low smoke flame retardant insulating material for manufacturing the cables of the nuclear power plants.

Description

Cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material and preparation method
Technical field
The present invention relates to a kind of cable insulation material, particularly a kind of used in nuclear power station cable insulation material belongs to the cable technology field.
Background technology
Nuclear power is a kind of safe, cleaning, the reliable energy.As the cable line system of Nuclear power plants " blood vessel " and " nerve ", be an important electric component of Nuclear power plants, playing important effect aspect the normal operation of Nuclear power plants and the safe shutdown, also be safe key element.Because its field of employment envrionment conditions is relatively harsher, the requirement of secure context is very high, promptly requires not only have the general characteristic of common cable, also will have low cigarette, Halogen, characteristic such as fire-retardant, and to have specific environment resistant, as radiation resistance, anti-LOCA (loss of coolant accident) property etc.Because the restriction of cable material, present many enterprises only can manufacture the electric wire of reactor housing external application, and the cable in the reactor housing is then seldom produced, and can not satisfy the demand in market.So research, exploitation cables of nuclear power are one of cable research and production enterprise very urgent task with the irradiation resistant non-halogen low smoke flame-retardant insulating material.
Summary of the invention
Purpose of the present invention is exactly for satisfying the demand in market, a kind of cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material and preparation method with good anti-radiation performance, mechanical property excellence, good electric property, long service life being provided.
Technical scheme of the present invention is: cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material, its raw material comprises: by terpolymer EP rubber-phenyl siloxane rubber (matrix of 60-40~90-10) form, by magnesium hydroxide, the flame-retardant system that aluminium hydroxide and zinc borate are formed, the strengthening agent that constitutes by white carbon black, the radioprotective system of forming by nano ceric oxide and phenyl siloxane rubber, by two tert-butyl peroxy isopropyl benzenes, the vulcanization system that cyanacrylate and zinc oxide are formed, by 2-mercaptobenzimidazole and 2,2,4-trimethylammonium-1, the protection system that the 2-dihyaroquinoline is formed, coupling agent by vinyl three ('beta '-methoxy oxyethyl group) silane formation, by stearic acid, the Lay mattress dispersion system that A-25 forms that looses, the tenderizer of forming by paraffin oil.The raw material of above-mentioned cable insulation material comprises following weight part:
Above-mentioned cables of nuclear power with the preparation method of irradiation resistant non-halogen low smoke flame-retardant insulating material is, earlier with terpolymer EP rubber, phenyl siloxane rubber, zinc borate, white carbon black, nano ceric oxide, zinc oxide, cyanacrylate, 2-mercaptobenzimidazole, 2,2,4-trimethylammonium-1, the 2-dihyaroquinoline, the Lay mattress A-25 that looses, stearic acid, add Banbury mixer, mix 2~4min, treat to add when temperature rises to 85~95 ℃ magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane and paraffin oil, mix 2~5min, binder removal when treating that temperature rises to 110~125 ℃, replenish mixing through mill, room temperature is cooled to below 70 ℃ behind the filter rubber machine filter rubber, then sizing material and two tert-butyl peroxy isopropyl benzene is added Banbury mixer again, mixes 1~4min, binder removal, mill replenish mixing and send into and grind sheet under the sheet machine.Make cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material.
Prescription of the present invention, proportioning are scientific and reasonable, technology advanced person.Adopt the fabulous high phenyl siloxane rubber of good terpolymer EP rubber of radiation-resistant property and radiation-resistant property as body material, and add anti-irradiation agent therein, thereby guaranteed that insulating material has excellent radiation-resistant property.
The adding of heavy dose of inorganic no-halogen composite flame retardant system (fire retardant magnesium hydroxide, aluminium hydroxide and have the fire retardant zinc borate of synergistic fire retardation with it) makes material have the excellent flame retardancy energy, has guaranteed that insulated wire cores can pass through single testing vertical flammability.Simultaneously, the adding of dispersion system (Lay mattress loose A-25, stearic acid) has guaranteed the good distribution of flame-retardant system in the base rubber material, makes heavy dose of inorganic combustion inhibitor reduce to minimum to the disadvantageous effect of the mechanical property of materials.
The adding of thermal silica that reinforcing property and electrical insulation capability are good and silane coupling agent (vinyl three ('beta '-methoxy oxyethyl group) silane) has guaranteed that insulating material provided by the invention has good electric property and mechanical property.During terpolymer EP rubber-silicon rubber blend, add an amount of white carbon black (strengthening agent) and silane coupling agent, both can improve the resistance to elevated temperatures of terpolymer EP rubber, can improve the physical strength and the water tolerance of silicon rubber again, be higher than the blend that terpolymer EP rubber, physical strength are better than silicon rubber thereby obtain a kind of thermotolerance.Reason is: coupling agent can react with the reinforcing filler white carbon black, can combine with terpolymer EP rubber again, makes terpolymer EP rubber and silicon rubber form a kind of special networks structure.In addition, this polymer blend has also kept the performance of heat-resisting water of EPDM and water-fast steam.
Antioxidant 2-mercaptobenzimidazole and 2,2, the composite protective system that 4-trimethylammonium-1,2-dihyaroquinoline are formed has overcome amine commonly used and phenol antioxidant to the disadvantageous effect of peroxide cure, makes aging resistance of materials obtain improving significantly.The result of accelerating thermal aging test shows that by the cable that insulating material of the present invention is produced, can reach more than 40 years its work-ing life.Table 1 is to adopt the insulated wire cores of material produce of the present invention to have following performance after tested:
The partial properties of the insulated wire cores of table 1 material produce of the present invention
Embodiment
Embodiment 1:
Used in nuclear power station irradiation resistant non-halogen low smoke flame-retardant cable insulation material, its raw material comprises: by terpolymer EP rubber-phenyl siloxane rubber (matrix of 60-40~100-0) form, by magnesium hydroxide, the flame-retardant system that aluminium hydroxide and zinc borate are formed, the strengthening agent that constitutes by white carbon black, the antiradiation agent of forming by nano ceric oxide and phenyl siloxane rubber, by two tert-butyl peroxy isopropyl benzenes, the vulcanization system that cyanacrylate and zinc oxide are formed, by 2-mercaptobenzimidazole and 2,2,4-trimethylammonium-1, the protection system that the 2-dihyaroquinoline is formed, coupling agent by vinyl three ('beta '-methoxy oxyethyl group) silane formation, by stearic acid, the Lay mattress dispersion system that A-25 forms that looses, the tenderizer of forming by paraffin oil.The raw material of above-mentioned cable insulation material comprises following component and content (weight part):
At first will send into Banbury mixer by proportioning except that the raw material magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane, two tert-butyl peroxy isopropyl benzene and the paraffin oil, mix 2~4min, treat to add when temperature rises to 85~95 ℃ magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane and paraffin oil, mix 2~5min, binder removal when treating that temperature rises to 110~125 ℃, room temperature is cooled to below 70 ℃ after mill replenishes mixing, filter rubber machine filter rubber.Then sizing material and two tert-butyl peroxy isopropyl benzene are added Banbury mixer again, mix 1~4min, binder removal, mill replenishes mixing and sends into and grind sheet under the sheet machine, makes cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material.
Embodiment 2:
Used in nuclear power station irradiation resistant non-halogen low smoke flame-retardant cable insulation material, its raw material comprise following component and content (weight part):
At first will send into Banbury mixer by proportioning except that the raw material magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane, two tert-butyl peroxy isopropyl benzene and the paraffin oil, mix 2~4min, treat to add when temperature rises to 85~95 ℃ magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane and paraffin oil, mix 2~5min, binder removal when treating that temperature rises to 110~125 ℃, room temperature is cooled to below 70 ℃ after mill replenishes mixing, filter rubber machine filter rubber.Then sizing material and two tert-butyl peroxy isopropyl benzene are added Banbury mixer again, mix 1~4min, binder removal, mill replenishes mixing and sends into and grind sheet under the sheet machine, makes cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material.
Embodiment 3:
Used in nuclear power station irradiation resistant non-halogen low smoke flame-retardant cable insulation material, its raw material comprise following component and content (weight part):
At first will send into Banbury mixer by proportioning except that the raw material magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane, two tert-butyl peroxy isopropyl benzene and the paraffin oil, mix 2~4min, treat to add when temperature rises to 85~95 ℃ magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane and paraffin oil, mix 2~5min, binder removal when treating that temperature rises to 110~125 ℃, room temperature is cooled to below 70 ℃ after mill replenishes mixing, filter rubber machine filter rubber.Then sizing material and two tert-butyl peroxy isopropyl benzene are added Banbury mixer again, mix 1~4min, binder removal, mill replenishes mixing and sends into and grind sheet under the sheet machine, makes cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material.

Claims (2)

1. cables of nuclear power irradiation resistant non-halogen low smoke flame-retardant insulating material is characterized in that comprising following weight part:
Terpolymer EP rubber 60~100
Phenyl siloxane rubber 10~40
Magnesium hydroxide 50~100
Aluminium hydroxide 50~100
Zinc borate 5~20
White carbon black 5~15
Nano ceric oxide 5~20
Zinc oxide 3~8
Two tert-butyl peroxy isopropyl benzenes 2~5
Cyanacrylate 1~5
2-mercaptobenzimidazole 1~4
2,2,4-trimethylammonium-1,2-dihyaroquinoline 1~4
The Lay mattress A-25 1~5 that looses
Stearic acid 1~3
Vinyl three ('beta '-methoxy oxyethyl group) silane 1~5
Paraffin oil 5~15.
2. the cables of nuclear power as claimed in claim 1 preparation method of irradiation resistant non-halogen low smoke flame-retardant insulating material, it is characterized in that earlier terpolymer EP rubber, phenyl siloxane rubber, zinc borate, white carbon black, nano ceric oxide, zinc oxide, cyanacrylate, 2-mercaptobenzimidazole, 2,2,4-trimethylammonium-1, the 2-dihyaroquinoline, the Lay mattress A-25 that looses, stearic acid, add Banbury mixer, mix 2~4min, treat to add when temperature rises to 85~95 ℃ magnesium hydroxide, aluminium hydroxide, vinyl three ('beta '-methoxy oxyethyl group) silane and paraffin oil, mix 2~5min, binder removal when treating that temperature rises to 110~125 ℃, replenish mixing through mill, room temperature is cooled to below 70 ℃ behind the filter rubber machine filter rubber, then sizing material and two tert-butyl peroxy isopropyl benzene are added Banbury mixer again, mix 1~4min, binder removal, mill replenish mixing and send into and grind sheet under the sheet machine.
CN 200910030927 2009-04-20 2009-04-20 Radiation-resistant halogen-free low smoke flame retardant insulating material for cables of nuclear power plants and preparation method Active CN101531789B (en)

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