1E-level K1-type halogen-free flame-retardant heat-shrinkable pipe for nuclear power plant and preparation method thereof

A technology for nuclear power plants and heat-shrinkable tubes, which is used in nuclear power generation, nuclear engineering, climate sustainability, etc., can solve the problems that heat-shrinkable tubes cannot meet the technical requirements of heat-shrinkable tubes in nuclear power plants, and improve heat-aging resistance and flame retardancy. Good performance and the effect of improving radiation resistance

Active Publication Date: 2012-05-02
CHANGYUAN ELECTRONICS DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the problem that the existing heat-shrinkable tubes cannot meet the technical requirements of nucle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0033] Get 50 parts by weight of ethylene-ethyl acrylate copolymer, 50 parts of ethylene-propylene rubber, 10 parts of microcapsule red phosphorus, 40 parts of aluminum hydroxide, polysuccinic acid (4-hydroxyl-2,2,6,6-tetra 1.8 parts of methyl-1-piperidine ethanol) ester, 1.2 parts of 2-(2'-hydroxy-3',5'-di-t-pentylphenyl) benzotriazole, tetrakis(β-(3,5- 4 parts of di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, 4 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), 3.5 parts of zinc stearate. The above materials are mixed and granulated by banburying, and then extruded into pipes with a single-screw extruder. The pipes are crosslinked by cobalt 60 or electron accelerator 100KGy radiation, and the pipes after radiation crosslinking are expanded 4 times at a temperature of 120°C. , to obtain 1E grade K1 heat shrinkable tubes for nuclear power plants, the performance of which is as follows:

[0034] Flame retardancy: pass VW-1, tensile strength: 13.2Mpa, el...

preparation Embodiment 2

[0040] Take 50 parts by weight of low-density polyethylene, 50 parts of ethylene-propylene rubber, 5 parts of microcapsule red phosphorus, 60 parts of aluminum hydroxide, polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl- 0.5 parts of 1-piperidine ethanol) ester, 0.5 parts of 2-(2'-hydroxy-3',5'-di-t-pentylphenyl)benzotriazole, tetrakis(β-(3,5-di-tert-butyl 2 parts of pentaerythritol ester of 4-hydroxyphenyl)propionate, 2 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), 1 part of polyethylene wax, zinc stearate 1 serving. The above materials are mixed and granulated by banburying, and then extruded into pipes with a single-screw extruder. The pipes are crosslinked by cobalt 60 or electron accelerator 100KGy radiation, and the pipes after radiation crosslinking are expanded 4 times at a temperature of 120°C. , to obtain 1E grade K1 heat shrinkable tubes for nuclear power plants, the performance of which is as follows:

[0041] Flame retardancy: pass VW-1, tensile streng...

preparation Embodiment 3

[0047] Get 50 parts by weight of ethylene-methyl methacrylate copolymer, 50 parts of ethylene-octene copolymer, 15 parts of microcapsule red phosphorus, 20 parts of aluminum hydroxide, polysuccinic acid (4-hydroxyl-2,2, 3 parts of 6,6-tetramethyl-1-piperidine ethanol) ester, 2 parts of 2-(2'-hydroxy-3',5'-di-t-pentylphenyl) benzotriazole, tetrakis(β- 6 parts of (3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, 6 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), stearin Zinc acid 2.5 parts, stearic acid 2.5 parts. The above materials are mixed and granulated by banburying, and then extruded into pipes with a single-screw extruder. The pipes are crosslinked by cobalt 60 or electron accelerator 100KGy radiation, and the pipes after radiation crosslinking are expanded 4 times at a temperature of 120°C. , to obtain 1E grade K1 heat shrinkable tubes for nuclear power plants, the performance of which is as follows:

[0048] Flame retardancy: Pass VW-1, te...

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Abstract

The invention relates to a 1E-level K1-type halogen-free flame-retardant heat-shrinkable pipe for a nuclear power plant, comprising the following components in parts by weight: 100 parts of vinyl polymer, 5-15 parts of microcapsule red phosphorus, 20-60 parts of aluminium hydroxide, 0.5-3 parts of light stabilizer, 0.5-2 parts of ultraviolet absorber, 4-12 parts of antioxidant and 2-5 parts of lubricant, wherein the light stabilizer is polysuccinic acid (4-hydroxyl-2, 2, 6, 6-tetramethyl-1-pyridine) ester; the ultraviolet absorber is 2-(2'-hydroxyl-3', 5'-ditrimethylacetic phenyl) benzotriazole; and the antioxidant is formed by mixing tetra(beta-(3, 5-ditertbutyl-4-hydroxyl phenyl) propionic acid) tetranhaptanoate and 4, 4'-thioic di(6-tertiary butyl-3-methylphenol) according to the proportion of 1:1. The 1E-level K1-type halogen-free flame-retardant heat-shrinkable pipe for the nuclear power plant does not contain halogen, is good in flame retardance, can pass the VW-1 burning test and can be used for 60 years under the temperature condition of 90 DEG C.

Description

technical field [0001] The invention relates to a heat-shrinkable tube and a preparation method thereof, in particular to a heat-shrinkable tube which can be used in nuclear power plants and a preparation method thereof. Background technique [0002] Nuclear power belongs to clean energy and is a priority industry in my country. By the end of 2008, my country had built three nuclear power bases in Qinshan, Zhejiang, Daya Bay, Guangdong, and Tianwan, Jiangsu, with 11 active nuclear power units and an installed capacity of 9.1 million kilowatts. According to my country's nuclear power development goals determined in the 2007 "Nuclear Power Medium and Long-term Development Plan", by 2020 my country will build 40 million kilowatts of nuclear power, and the proportion of nuclear power will increase from 2% to 4%. [0003] The heat-shrinkable tube is installed in the containment, and can complete its specified functions under normal environmental conditions, seismic loads, and ac...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/16C08K13/06C08K9/10C08K3/02C08K3/22C08K5/3475C08K5/134G21C13/02
CPCY02E30/40Y02E30/30
Inventor 赵成刚尹沾松曾志安王进
Owner CHANGYUAN ELECTRONICS DONGGUAN
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