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Chemically cross-linked low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof

A polyolefin cable material, chemical cross-linking technology, used in circuits, electrical components, plastic/resin/wax insulators, etc., can solve the problems of complex production process and achieve the effect of improving temperature resistance

Active Publication Date: 2020-10-30
CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Publication No. CN105885188A provided "Chemical Crosslinking Low Smoke Halogen Free Flame Retardant Polyolefin Composite Material Preparation and Application Method", although the masterbatch without crosslinking agent was first prepared to overcome the defects of pre-crosslinking caused by high banburying temperature, However, there is also the problem that the crosslinking agent DCP decomposes to produce pre-crosslinking during the extrusion molding process of the cable material, and there is also the need to firstly prepare part of the material through banburying and then single-screw extrusion to prepare the masterbatch, and then through twin-screw extrusion at the same time The process of dropping the cross-linking agent makes the production process complicated

Method used

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  • Chemically cross-linked low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof
  • Chemically cross-linked low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof
  • Chemically cross-linked low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0036] The formula is as follows:

[0037]The mass % content of methyl acrylate monomer is 24% and 40 parts of ethylene-methyl acrylate copolymers whose DSC melting point is less than 85°C, 40 parts of ethylene-butylene copolymer elastomers whose DSC melting point is less than 85°C, maleic anhydride Branched ethylene-octene copolymer elastomer 20 parts, magnesium hydroxide 90 parts, calcium magnesium carbonate 10 parts, zinc borate 3 parts, 2,5-dimethyl-2,5-bis(tert-butylperoxy)- 3.5 parts of 3-hexyne, 1.5 parts of triallyl isocyanurate, 1 part of p-benzoquinone, 3 parts of silicone, 1 part of long-chain alcohol polyester, 4,4'-thiobis(6-tert Butyl-3-methylphenol) 1.5 parts, 1,3,5, three (3,5-di-tert-butyl, 4-hydroxybenzyl) s-triazine 2 parts, bis(3,5-di-tert-butyl 2 parts of base-4-hydroxyphenylpropionoyl) hydrazine.

[0038] The preparation method is as follows: Put the above-mentioned weighed materials into a high-speed mixer, stir and mix them at high speed for 2 minutes...

Embodiment 3

[0041] The formula is as follows:

[0042] The mass % content of ethyl acrylate monomer is 35% and 70 parts of ethylene-ethyl acrylate copolymer whose DSC melting point is less than 85°C, 10 parts of ethylene-hexene copolymer elastomer with DSC melting point less than 85°C, grafted with maleic anhydride 30 parts of ethylene-methyl acrylate copolymer, 110 parts of magnesium hydroxide, 35 parts of calcium magnesium carbonate, 5 parts of carbon nanotubes, 2,5-dimethyl-2,5-bis(tert-butylperoxy)-3 - 1.5 parts of hexyne, 2 parts of triallyl isocyanurate, 0.1 part of tetramethylbenzoquinone, 1 part of long-chain alcohol polyester, 3 parts of polyhydroxy magnesium stearate, 4,4'-thio 1 part of bis(6-tert-butyl-3-methylphenol), 1 part of tetrakis[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester, bis( 1 part of 3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hydrazine.

[0043] The preparation method is as follows: put the above-mentioned weighed materials into a ...

Embodiment 4

[0046] The formula is as follows:

[0047] The mass % content of butyl acrylate monomer is 30% and 60 parts of ethylene-butyl acrylate copolymers whose DSC melting point is less than 85°C, 20 parts of ethylene-butylene copolymer elastomers whose DSC melting point is less than 85°C, maleic anhydride 15 parts of ethylene propylene rubber, 75 parts of magnesium hydroxide, 50 parts of calcium magnesium carbonate, 8 parts of aluminum hypophosphite, 2,5-dimethyl-2,5-bis(tert-butylperoxy)-3-hexyne 3.5 parts, 1.5 parts of triallyl isocyanurate, 0.8 parts of 2-methyl-2-nitrosomethane, 2 parts of silicone, 1 part of long-chain alcohol polyester, three (2,4-di-tert 2 parts of butylphenyl) phosphite, 1 part of 1,3,5, tris(3,5-di-tert-butyl, 4-hydroxybenzyl)-s-triazine, 1 part of tetrakis[β-(3',5' -2.3 parts of di-tert-butyl-4'-hydroxyphenyl)propionic acid]pentaerythritol ester.

[0048] The preparation method is as follows: put the above-mentioned weighed materials into a high-speed mix...

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Abstract

The invention relates to a chemical crosslinking low-smoke and halogen-free flame-retardant polyolefin cable material and a preparation method thereof. The preparation method comprises the following steps of firstly, weighing the following raw materials in parts by weight: 80 parts of base resin, 10 to 30 parts of compatilizer, 100 to 145 parts of inorganic flame-retardant agent, 3 to 10 parts offlame-retardant synergist, 1.5 to 3.5 parts of crosslinking agent, 1.0 to 2.0 parts of crosslinking sensitizer, 0.1 to 1 part of stabilizer, 2 to 4 parts of lubricant, and 2.0 to 5.5 parts of antioxidant; feeding into a high-speed mixer, stirring at normal temperature, sending into a internal mixer to smelt; feeding the material into a single-screw extruder in a forced conical feeding way, extruding by a single-screw extruder, and sequentially pelletizing, cooling and packaging, so as to obtain the chemical crosslinking low-smoke and halogen-free flame-retardant polyolefin cable material, wherein the base resin is prepared from the following raw materials in parts by weight according to a proportional ratio: 40 to 70 parts of vinyl copolymer and 10 to 40 parts of polyolefin elastomer. Thechemical crosslinking low-smoke and halogen-free flame-retardant polyolefin cable material and the preparation method have the advantages that the temperature-resistant class is improved, and the pre-crosslinking is avoided; the technology is concise, and the preparation efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of polymer materials for insulation, and in particular relates to a chemically cross-linked low-smoke halogen-free flame-retardant polyolefin cable material, and also relates to a preparation method thereof. Background technique [0002] Cross-linked polyolefin is the use of physical and chemical methods to change the polyolefin molecule from a linear molecular structure to a three-dimensional network structure, from a thermoplastic material to a thermosetting material, thereby improving its heat resistance and mechanical properties and expanding its application range. [0003] At present, cross-linked low-smoke halogen-free flame-retardant polyolefin materials for wire and cable are mainly used in China for radiation cross-linking. However, radiation cross-linking is generally only suitable for For wires and cables with thin thickness and regular structure, and most cable factories do not have radiation equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L51/06C08K13/02C08K13/04C08K7/24C08K3/22C08K3/26C08K3/32C08K5/14C08K3/38H01B3/44
CPCC08K2003/2224C08K2003/387C08K2201/011C08L23/0815C08L23/0853C08L23/0869C08L2201/02C08L2203/202C08L2205/03C08L2312/00H01B3/441C08L51/06C08K13/02C08K3/22C08K3/26C08K3/32C08K5/14C08K3/38C08K13/04C08K7/24C08L51/04
Inventor 管文武苏桂明石凯凯朱逸轩姚慧林
Owner CHANGSHU ZHONGLIAN PHOTOELECTRICITY NEW STUFF
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