Silane crosslinked halogen-free flame-retardant polyethylene cable material and preparation method thereof

A flame retardant polyethylene and silane cross-linking technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of difficult safety protection, low equipment investment, low production cost, etc., to improve thermodynamic properties, overcome the phenomenon of agglomeration, Strong anti-aging properties

Inactive Publication Date: 2010-11-10
WUHAN XINTIANDI SPECIAL CABLE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Chemical Bulletin" (No. 1, 2006, page 18) reported that radiation crosslinking is the use of γ-rays (Co-60 source) or high-energy electron beams (electron accelerators) to irradiate polymers to generate polymer free radicals, which are combined with each other. Form cross-linking bonds to make linear polymer materials into a network structure. The disadvantages are high equipment cost, difficult safety protection and great damage to material properties; peroxide cross-linking uses organic peroxides as cross-linking ag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A silane crosslinked halogen-free flame-retardant polyethylene cable material and its preparation method: 45-55wt% low-density polyethylene, 7-10wt% ethylene-vinyl acetate copolymer with a vinyl acetate content of 40%, 3-5wt% The general formula of % is RSi(OR') 3 Vinyltriethylsilane, 0.3-0.5wt% dicumyl peroxide, 0.07-0.1wt% dibutyltin dilaurate, 25-30wt% modified nano Mg(OH) 2 , 5-10wt% of ammonium polyphosphate with a relative molecular weight of 2500 and 0.75-1wt% of antioxidant 1010, mixed and granulated at 150-160°C to prepare silane cross-linked halogen-free flame-retardant polyethylene cables material. The oxygen index of the cable material is 33-36, the tensile strength is 12-14MP and the elongation at break is 420-450%.

Embodiment 2

[0015] A silane crosslinked halogen-free flame-retardant polyethylene cable material and its preparation method: 50-60wt% low-density polyethylene, 6-8wt% ethylene-vinyl acetate copolymer with a vinyl acetate content of 33%, 2-4wt% The general formula of % is RSi(OR') 3 Vinyltrimethylsilane, 0.2-0.4wt% dibutyl peroxide, 0.04-0.07wt% alkylbenzenesulfonic acid, 20-25wt% modified nano Mg(OH) 2 , 7-13wt% of ammonium polyphosphate with a relative molecular weight of 3100 and 0.7-0.8wt% of antioxidant 1010, mixed and granulated at 150-160°C to prepare silane cross-linked halogen-free flame-retardant polyethylene cables material. The oxygen index of the cable material is 33.1-35, the tensile strength is 13-14.4MP and the elongation at break is 419-443%.

Embodiment 3

[0017] A silane crosslinked halogen-free flame-retardant polyethylene cable material and its preparation method: 55-65wt% low-density polyethylene, 5-7wt% ethylene-vinyl acetate copolymer with a vinyl acetate content of 28%, 2-3wt% The general formula of % is RSi(OR') 3 methacryloxypropyltriethoxysilane, 0.1-0.3wt% BPO, 0.01-0.04wt% hydrochloric acid, 15-20wt% modified nano Mg(OH) 2 10-15wt% ammonium polyphosphate is ammonium polyphosphate with a relative molecular weight of 2000 and 0.5-0.75wt% antioxidant 1010, mixed and granulated at 150-160°C to obtain silane cross-linked halogen-free barrier Burning polyethylene cable material. The oxygen index of the cable material is 32.5-34, the tensile strength is 12.5-15MP and the elongation at break is 415-440%.

[0018] This specific embodiment adopts that the decomposition temperature is higher than that of Al(OH) 3 Mg(OH) 2 As the main flame retardant, it can avoid Al(OH) 3 The decomposition of the resin will cause bubbles i...

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Abstract

The invention relates to a silane crosslinked halogen-free flame-retardant polyethylene cable material and a preparation method thereof. The technical scheme of the invention is as follows: 45 to 65 percent by weight of low-density polyethylene, 5 to 10 percent by weight of ethylene-vinylacetate copolymer, 2 to 5 percent by weight of silane with the general formula of RSi(OR')3, 0.1 to 0.5 percent by weight of peroxide initiator, 0.01 to 0.1 percent by weight of crosslinked catalyst, 15 to 30 percent by weight of modified nano Mg(OH)2, 5 to 15 percent by weight of ammonium polyphosphate and 0.5 to 1 percent by weight of antioxidant 1010 are mixed under the temperature of 150DEG C to 160DEG C, and after pelleting, the cable material is produced. The materials can be easily obtained, the technique is simple, the oxygen index of the prepared cable material is 32.5 to 36, the tensile strength is 12MP to 15MP, and the elongation at break is 415 to 450 percent. Consequently, the cable material is characterized by high tensile strength, high elongation at break, high anti-aging property and high temperature resistance, and cannot harm the environment when being discarded.

Description

technical field [0001] The invention belongs to the technical field of polyethylene cable material. Specifically relates to a silane crosslinked halogen-free flame-retardant polyethylene cable material and a preparation method thereof. Background technique [0002] The earth environment we live in is increasingly seriously polluted, which has endangered the quality of life and health of human beings. The traditionally used polyvinyl chloride (PVC) insulated wire and cable is a very serious source of pollution. Its main hazards are electrical fires and the production and disposal of harmful substances such as dioxins, halides, and heavy metals. Therefore, the current wire and cable industry has implemented halogen-free, low-smoke and flame-retardant wires and cables. Moreover, with the rapid development of my country's economy, the demand for wires and cables from all walks of life continues to increase, and at the same time higher requirements are placed on the various pro...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K5/5425C08K3/22C08K3/32C08J3/24H01B7/295H01B3/44
Inventor 罗海涛柯昌美金群胡永张市甫王光辉马丽婵
Owner WUHAN XINTIANDI SPECIAL CABLE
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