CN105374450A - Halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for nuclear power station - Google Patents
Halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for nuclear power station Download PDFInfo
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- CN105374450A CN105374450A CN201510692700.6A CN201510692700A CN105374450A CN 105374450 A CN105374450 A CN 105374450A CN 201510692700 A CN201510692700 A CN 201510692700A CN 105374450 A CN105374450 A CN 105374450A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/307—Other macromolecular compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
Provided is a halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for a nuclear power station. The halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe comprises an outer layer and an inner layer. The outer layer is a thermal shrinkable layer and the inner layer is a hot melt adhesive layer. The outer layer comprises, by weight, 5 to 10 parts of ethylene-vinyl acetate copolymer, 60 to 80 parts of ethylene-methyl acrylate copolymer, 20 to 40 parts of ethylene propylene rubber, 6 to 12 parts of microencapsulated red phosphorus, 40 to 55 parts of magnesium hydroxide, 8 to 15 parts of boron nitride, 4 to 8 parts of complex antioxidant, and 1 to 2 parts of light stabilizer. The inner layer comprises, by weight, 100 parts of ethylene-methyl acrylate copolymer, 8 to 15 parts of dysprosium oxide, 4 to 8 parts of complex antioxidant, and 1 to 2 parts of light stabilizer. The halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for the nuclear power station is excellent in waterproof and moisture-proof performance, excellent in heat resistance, excellent in radiation resistance, and excellent in high-temperature high-pressure water vapor resistance, and has insulation performance and voltage resistance satisfying requirements.
Description
Technical field
The present invention relates to a kind of heat-shrink tube of used in nuclear power station.
Background technology
Nuclear power belongs to clean energy resource, is the industry that China first develops.Within 2014, China runs nuclear power generating sets 22, and installed capacity reaches 2029.658 ten thousand kilowatts, has 26 at the nuclear power generating sets built, about 2,800 ten thousand kilowatts.
Used in nuclear power station 1E level twolayer firing shrinkage tube is arranged in containment, not only at ambient environment, and can complete its predetermined function after generation nuclear accident environment and accident.According to the requirement of three generations's nuclear power, the thermal life of used in nuclear power station 1E level twolayer firing shrinkage tube will reach 90 DEG C and use 60 years, after the LOCA experiment of the radiative aging of 2400KGy and maximum temperature 218 DEG C, maximum pressure 0.83MPa, its insulation property and withstand voltage properties meet the demands.
At present, explicitly call for used in nuclear power station 1E level twolayer firing shrinkage tube not contain halogen, but market used in nuclear power station 1E level twolayer firing shrinkage tube on sale contain halogen, does not meet nuclear power requirement, the used in nuclear power station 1E level twolayer firing shrinkage tube of market in urgent need halogen-free flameproof.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of waterproof and dampproof excellent performance, have excellent heat resistance, radiation resistance and high temperature high voltage resistant steam performance, the halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube that insulation property and withstand voltage properties meet the demands.
In order to solve the problems of the technologies described above, the present invention proposes following technical proposal: a kind of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube, and it comprises skin and internal layer, and this skin is shrink wrap layer, and this internal layer is hot melt adhesive layer;
This skin is made up of the following component according to weighing scale:
Ethylene-vinyl acetate copolymer 5-10 part;
Ethylene-methyl acrylate copolymer 60-80 part;
Ethylene-propylene rubber 20-40 part;
Microcapsule red phosphorus 6-12 part;
Magnesium hydroxide 40-55 part;
Boron nitride 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part;
This internal layer is made up of the following component according to weighing scale:
Ethylene-methyl acrylate copolymer 100 parts;
Dysprosia 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part;
Above-mentioned ethylene-vinyl acetate copolymer grafted maleic anhydride, percent grafting 1.5-2.0%;
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned skin is used is 14%-20%;
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned internal layer is used is more than 32%;
The particle diameter of above-mentioned magnesium hydroxide is less than 2 μm, and through organosilyl surface process;
Above-mentioned skin and internal layer composite antioxidant used, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine forms according to the proportions of weighing scale 1:1;
Above-mentioned skin and internal layer light stabilizer used are poly-succinic (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine ethanol) ester.
Compared to existing technology, the present invention has following beneficial effect: compared with halogen flame, and the flame retarding efficiency of halogen-free flame retardants is poor, reach VW-1 fire-retardant, certainly will add a large amount of fire retardants.After fire retardant addition increases, the mechanical property degradations such as the hot strength of material, nuclear power station requirement cannot be met, this problem annoyings whole industry always, adopt maleic anhydride graft vinyl acetate co-polymer, the magnesium hydroxide of percent grafting 1.5-2.0% and organosilicon process, significantly improves the compatibility of high molecular polymer and fire retardant, while having accomplished that VW-1 is fire-retardant, the mechanical properties such as hot strength have met nuclear power station requirement.
The particle diameter of magnesium hydroxide must be less than 2 μm, and particle diameter is little, and specific area is large, and good flame retardation effect, only has particle diameter to be less than 2 μm, just can reach the flame-retardancy requirements of VW-1.
The skin of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube of the present invention is shrink wrap layer; internal layer is hot melt adhesive layer; after outer heat is shunk; internal layer hotmelt melts; fill the gap between outer and protected position; skin and protected position are firmly bonded together, waterproof and dampproof excellent performance.
Halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube of the present invention has excellent heat resistance, radiation resistance and high temperature high voltage resistant steam performance, continuously across the heat ageing of 150 DEG C, 2100 hours (be equivalent to 90 DEG C and use 60 years), after the LOCA experiment of the radiative aging of 2400KGy and maximum temperature 218 DEG C, maximum pressure 0.83MPa, its insulation property and withstand voltage properties meet the demands.
Embodiment
A kind of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube, it comprises skin and internal layer, and this skin is shrink wrap layer, and this internal layer is hot melt adhesive layer.
This skin is made up of the following component according to weighing scale:
Ethylene-vinyl acetate copolymer 5-10 part;
Ethylene-methyl acrylate copolymer 60-80 part;
Ethylene-propylene rubber 20-40 part;
Microcapsule red phosphorus 6-12 part;
Magnesium hydroxide 40-55 part;
Boron nitride 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part.
This internal layer is made up of the following component according to weighing scale:
Ethylene-methyl acrylate copolymer 100 parts;
Dysprosia 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part.
Above-mentioned ethylene-vinyl acetate copolymer grafted maleic anhydride, percent grafting 1.5-2.0%.
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned skin is used is 14%-20%.
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned internal layer is used is more than 32%.
The particle diameter of above-mentioned magnesium hydroxide is less than 2 μm, and through organosilyl surface process.
Above-mentioned skin and internal layer composite antioxidant used, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine forms according to the proportions of weighing scale 1:1.
Above-mentioned skin and internal layer light stabilizer used are poly-succinic (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine ethanol) ester.
Embodiment 1
Get outer material requested, namely ethylene-vinyl acetate copolymer 5 parts, ethylene-methyl acrylate copolymer 60 parts, 40 parts, ethylene-propylene rubber, microcapsule red phosphorus 6 parts, magnesium hydroxide 55 parts, dysprosia 8 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 4 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 1 part;
Get internal layer material requested, namely ethylene-methyl acrylate copolymer 100 parts, dysprosia 8 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 4 parts, poly-succinic (the 4-hydroxyl-2,2 of the proportions of 1:1,6,6-tetramethyl-1-piperidine ethanol) ester 1 part;
Above material is respectively through banburying mixing granulator, then tubing is become with two single screw extrusion machine compound extrudeds, described tubing expands 4 times under Co 60 or electron accelerator 40-60KGy crosslinking with radiation and 130 DEG C of temperature, obtain halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube of the present invention, its performance is as follows:
Anti-flammability: by VW-1, hot strength: 13.8Mpa, elongation at break: 526%.Continuously across the heat ageing of 150 DEG C, 2100 hours, after the LOCA experiment of the radiative aging of 2400KGy and maximum temperature 218 DEG C, maximum pressure 0.83MPa, its insulation resistance 18M Ω, much larger than 2.5M Ω, proof voltage (3150V/mm) 5min, does not puncture, and meets nuclear power station requirement.
Preparation embodiment 2
Get outer material requested, namely ethylene-vinyl acetate copolymer 10 parts, ethylene-methyl acrylate copolymer 80 parts, 20 parts, ethylene-propylene rubber, microcapsule red phosphorus 12 parts, magnesium hydroxide 40 parts, dysprosia 15 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 8 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 2 parts;
Get internal layer material requested, namely ethylene-methyl acrylate copolymer 100 parts, dysprosia 15 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 8 parts, poly-succinic (the 4-hydroxyl-2,2 of the proportions of 1:1,6,6-tetramethyl-1-piperidine ethanol) ester 2 parts;
Above material is respectively through banburying mixing granulator, then tubing is become with two single screw extrusion machine compound extrudeds, described tubing expands 4 times under Co 60 or electron accelerator 40-60KGy crosslinking with radiation and 130 DEG C of temperature, obtain halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube of the present invention, its performance is as follows:
Anti-flammability: by VW-1, hot strength: 13.5Mpa, elongation at break: 365%.Continuously across the heat ageing of 150 DEG C, 2100 hours, after the LOCA experiment of the radiative aging of 2400KGy and maximum temperature 218 DEG C, maximum pressure 0.83MPa, its insulation resistance 16M Ω, much larger than 2.5M Ω, proof voltage (3150V/mm) 5min, does not puncture, and meets nuclear power station requirement.
Preparation embodiment 3
Get outer material requested, namely ethylene-vinyl acetate copolymer 7.4 parts, ethylene-methyl acrylate copolymer 70 parts, 30 parts, ethylene-propylene rubber, microcapsule red phosphorus 8 parts, magnesium hydroxide 47.5 parts, dysprosia 11.5 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 6 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 1.5 parts;
Get internal layer material requested, namely ethylene-methyl acrylate copolymer 100 parts, dysprosia 12 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 6 parts, poly-succinic (the 4-hydroxyl-2,2 of the proportions of 1:1,6,6-tetramethyl-1-piperidine ethanol) ester 1.5 parts;
Above material is respectively through banburying mixing granulator, then tubing is become with two single screw extrusion machine compound extrudeds, described tubing expands 4 times under Co 60 or electron accelerator 40-60KGy crosslinking with radiation and 130 DEG C of temperature, obtain used in nuclear power station 1E level twolayer firing shrinkage tube of the present invention, its performance is as follows:
Anti-flammability: by VW-1, hot strength: 14.3Mpa, elongation at break: 360%.Continuously across the heat ageing of 150 DEG C, 2100 hours, after the LOCA experiment of the radiative aging of 2400KGy and maximum temperature 218 DEG C, maximum pressure 0.83MPa, its insulation resistance 19M Ω, much larger than 2.5M Ω, proof voltage (3150V/mm) 5min, does not puncture, and meets nuclear power station requirement.
Claims (4)
1. a halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube, is characterized in that, it comprises skin and internal layer, and this skin is shrink wrap layer, and this internal layer is hot melt adhesive layer;
This skin is made up of the following component according to weighing scale:
Ethylene-vinyl acetate copolymer 5-10 part;
Ethylene-methyl acrylate copolymer 60-80 part;
Ethylene-propylene rubber 20-40 part;
Microcapsule red phosphorus 6-12 part;
Magnesium hydroxide 40-55 part;
Boron nitride 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part;
This internal layer is made up of the following component according to weighing scale:
Ethylene-methyl acrylate copolymer 100 parts;
Dysprosia 8-15 part;
Composite antioxidant 4-8 part;
Light stabilizer 1-2 part;
Above-mentioned ethylene-vinyl acetate copolymer grafted maleic anhydride, percent grafting 1.5-2.0%;
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned skin is used is 14%-20%;
The methyl acrylate content of the ethylene-methyl acrylate copolymer that above-mentioned internal layer is used is more than 32%;
The particle diameter of above-mentioned magnesium hydroxide is less than 2 μm, and through organosilyl surface process;
Above-mentioned skin and internal layer composite antioxidant used, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine forms according to the proportions of weighing scale 1:1;
Above-mentioned skin and internal layer light stabilizer used are poly-succinic (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine ethanol) ester.
2. a kind of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube according to claim 1, it is characterized in that, this skin is made up of the following component according to weighing scale: ethylene-vinyl acetate copolymer 5 parts, ethylene-methyl acrylate copolymer 60 parts, 40 parts, ethylene-propylene rubber, microcapsule red phosphorus 6 parts, magnesium hydroxide 55 parts, dysprosia 8 parts, by 4, 4 ＇-di-2-ethylhexylphosphine oxide (2, 6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3, 5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to the composite antioxidant 4 parts of the proportions of 1:1, poly-succinic (4-hydroxyl-2, 2, 6, 6-tetramethyl-1-piperidine ethanol) ester 1 part,
This internal layer is made up of the following component according to weighing scale: ethylene-methyl acrylate copolymer 100 parts, dysprosia 8 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 4 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 1 part.
3. a kind of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube according to claim 1, is characterized in that,
This skin is made up of the following component according to weighing scale: ethylene-vinyl acetate copolymer 10 parts, ethylene-methyl acrylate copolymer 80 parts, 20 parts, ethylene-propylene rubber, microcapsule red phosphorus 12 parts, magnesium hydroxide 40 parts, dysprosia 15 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 8 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 2 parts;
This internal layer is made up of the following component according to weighing scale: ethylene-methyl acrylate copolymer 100 parts, dysprosia 15 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 8 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 2 parts.
4. a kind of halogen-free flameproof used in nuclear power station 1E level twolayer firing shrinkage tube according to claim 1, it is characterized in that, this skin is made up of the following component according to weighing scale: ethylene-vinyl acetate copolymer 7.4 parts, ethylene-methyl acrylate copolymer 70 parts, 30 parts, ethylene-propylene rubber, microcapsule red phosphorus 8 parts, magnesium hydroxide 47.5 parts, dysprosia 11.5 parts, by 4, 4 ＇-di-2-ethylhexylphosphine oxide (2, 6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3, 5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to the composite antioxidant 6 parts of the proportions of 1:1, poly-succinic (4-hydroxyl-2, 2, 6, 6-tetramethyl-1-piperidine ethanol) ester 1.5 parts,
This internal layer is made up of the following component according to weighing scale: ethylene-methyl acrylate copolymer 100 parts, dysprosia 12 parts, by 4,4 ＇-di-2-ethylhexylphosphine oxide (2,6-DI-tert-butylphenol compounds) and N, N ＇-bis-[3-(3,5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine is according to composite antioxidant 6 parts, poly-succinic (the 4-hydroxyl-2 of the proportions of 1:1,2,6,6-tetramethyl-1-piperidine ethanol) ester 1.5 parts.
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| CN201510692700.6A CN105374450A (en) | 2015-10-24 | 2015-10-24 | Halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for nuclear power station |
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| CN201510692700.6A CN105374450A (en) | 2015-10-24 | 2015-10-24 | Halogen-free flame-retardant 1E-class double-layer thermal shrinkable pipe for nuclear power station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501697A (en) * | 2016-06-14 | 2017-12-22 | 上海长园电子材料有限公司 | It is easy to long-term formula of thermal contraction double-walled pipe for storing and transporting and preparation method thereof |
| CN113912928A (en) * | 2021-10-18 | 2022-01-11 | 江苏亨通电子线缆科技有限公司 | Halogen-free flame-retardant polyolefin cable material for automobiles and preparation method thereof |
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Application publication date: 20160302 |