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Irradiation-crosslinked low-smoke halogen-free inflaming retarding insulation material for nuclear power station cable and preparation method thereof

A technology for nuclear power plant cables and insulating materials, which is applied to insulated conductors, insulated cables, organic insulators, etc., can solve the problems of inorganic anti-radiation agent materials that have great influence on mechanical properties, expensive rare earth organic compounds, and insufficient anti-radiation effect.

Active Publication Date: 2012-12-26
上海至正新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-radiation effect of conventional antioxidants on polymer materials is not obvious enough, and the prior art uses inorganic anti-radiation agents and rare earth organic compounds
Rare earth organics are expensive, and the addition of inorganic anti-radiation agents has a great influence on the mechanical properties of materials

Method used

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  • Irradiation-crosslinked low-smoke halogen-free inflaming retarding insulation material for nuclear power station cable and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0082] Preparation method of halogen-free flame-retardant insulating material

[0083] In the present invention, the preparation method of irradiation cross-linked low-smoke halogen-free flame-retardant insulating material for nuclear power plant cables comprises the following steps:

[0084] Mix the flame retardant according to the proportion in a high-speed mixer until the temperature reaches 110°C±5°C, add zinc stearate and stir for 3-6 minutes, discharge and place, and use twin-screw extrusion to granulate with other materials according to the ratio Extrude and granulate by extruder to obtain radiation cross-linkable low-smoke halogen-free flame-retardant insulating material for nuclear power plant cables.

[0085] Preferably, the four temperature sections of the twin-screw granulator used in the extrusion granulation process are: feeding section 115-125°C, conveying section 125-135°C, melting section 135-145°C, head 140- 150°C.

[0086] More preferably, the above-ment...

Embodiment 1

[0101] Each component name and each component parts by weight are as follows:

[0102] EBA 70Kg

[0103] POE 20Kg

[0104] VLDPE 10Kg

[0105] Mg(OH) 2 110Kg

[0106] Melamine 15Kg

[0107] Zinc borate 5Kg

[0108] Compatibilizer (POE-g-MAH) 4Kg

[0109] Naugard 445 1Kg

[0110] Irganox 1010 0.5Kg

[0111] PS802 1.5Kg

[0112] 2-Mercaptobenzimidazole zinc salt (MBZ) 3Kg

[0113] 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) 2Kg

[0114] Irganox MD-1024 0.3Kg

[0115] Zinc stearate 0.5Kg

[0116] Triallyl isocyanurate (TAIC) 4Kg

[0117] The preparation method of the above invention comprises the following process steps: mixing the flame retardant magnesium hydroxide, melamine, and zinc borate in a high-speed mixer according to the ratio until the temperature reaches 110°C±5°C, adding zinc stearate and stirring After 3 to 6 minutes, the material is discharged and placed, and is extruded and granulated with other materials using a twin-screw granulator (...

Embodiment 2

[0120] Each component name and each component parts by weight are as follows:

[0121] EBA 65Kg

[0122] POE 20Kg

[0123] VLDPE 15Kg

[0124] Mg(OH) 2 95Kg

[0125] Melamine 5Kg

[0126] Zinc borate (ZnB) 10Kg

[0127] Compatibilizer (POE-g-MAH) 2Kg

[0128] Naugard 445 0.5Kg

[0129] Irganox 1010 0.5Kg

[0130] PS802 1Kg

[0131] 2-Mercaptobenzimidazole zinc salt (MBZ) 1Kg

[0132] 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) 2Kg

[0133] Irganox MD-1024 0.1Kg

[0134] Zinc stearate 0.2Kg

[0135] Triallyl isocyanurate (TAIC) 2Kg

[0136] The preparation method of above-mentioned cable material is identical with embodiment 1

[0137] The product in Example 2 is subjected to a performance detection test, and each performance value is as shown in the performance example.

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Abstract

The invention provides an irradiation-crosslinked low-smoke halogen-free inflaming retarding insulation material for a nuclear power station cable. The insulation material comprises the following components in parts by weight: 100 parts of basic resin (A), 2-5 parts of antioxidant (B), 3-10 parts of irradiation-resisting agent (C), 110-170 parts of fire retardant (D), 2-10 parts of compatilizer (E), 0.1-0.8 part of anticopper agent (F), 0.2-2 parts of lubricant (G) and 2-10 parts of cross-linking sensitizing agent (H), wherein the basic resin (A) comprises a combination of polyethylene-octene elastomer (POE) ethylene-butyl acrylate (EBA) and linear very low density polyethylene (VLDPE), and the weight ratio of the POE to the EBA to the VLDPE is (10-20):(65-80):(10-20).

Description

technical field [0001] The invention relates to a radiation cross-linked low-smoke, halogen-free, flame-retardant insulating material and a preparation method thereof, in particular to a 1E-level radiation-crosslinked, low-smoke, halogen-free, flame-retardant insulating material for nuclear power plant cables and a preparation method. Background technique [0002] Class 1E cables for nuclear power plants should be halogen-free, low-smoke, low-toxicity, and flame-retardant cables. The cables have excellent long-term thermal aging resistance, electrical stability, chemical stability, and radiation resistance. Under the environment of long-term thermal aging and nuclear radiation, the commonly used cable insulation materials will degrade seriously, and the performance of the materials cannot meet the requirements of nuclear power plant cables. Now the third-generation nuclear power plant cables are required to have a service life of more than 60 years when used at 90°C. The ori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08H01B3/44H01B7/02H01B7/28H01B7/295B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 宋刚
Owner 上海至正新材料有限公司
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