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Low-smoke fire-retardant high-strength high-oil-resistance cable sheath material and preparation method thereof

A low-smoke flame-retardant, cable sheathing technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of low tensile strength and elongation at break, large amount of flame retardant added, and achieve low cost of raw materials , Good oil resistance, small smoke effect

Inactive Publication Date: 2013-05-08
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of flame retardant added is large, and the tensile strength and elongation at break of the material are not high before and after oil resistance

Method used

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  • Low-smoke fire-retardant high-strength high-oil-resistance cable sheath material and preparation method thereof
  • Low-smoke fire-retardant high-strength high-oil-resistance cable sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 30 parts of ethylene-vinyl acetate copolymer, 70 parts by mass of nitrile rubber, 20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 50 parts of magnesium hydroxide after flame retardant modification, 12 parts of modified hydrotalcite , 3 parts of molecular sieve, 2.0 parts of smoke suppressant ammonium molybdate, 40 parts of reinforcing agent zinc methacrylate, 1.5 parts of anti-aging agent anti-RD, 1.5 parts of cross-linking agent dicumyl peroxide, triene auxiliary cross-linking agent Propyl isocyanurate 1.2 parts, processing aid calcium stearate 1.5 parts.

[0019] At 80°C, first process ethylene-vinyl acetate copolymer, calcium stearate, and maleic anhydride grafted ethylene-vinyl acetate copolymer on a two-roller mill until the rolls are covered, and then add nitrile rubber, anti-RD, The flame retardant, smoke suppressant, reinforcing agent, and crosslinking agent are melted and blended for 15 minutes, and then discharged, and the mixed material...

Embodiment 2

[0021] 40 parts of ethylene-vinyl acetate copolymer, 60 parts by mass of nitrile rubber, 20 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 50 parts of magnesium hydroxide after flame retardant modification, 8 parts of modified hydrotalcite , 7 parts of microcapsule red phosphorus, 2.0 parts of smoke suppressant molybdenum trioxide, 20 parts of reinforcing agent zinc methacrylate, 1.5 parts of anti-aging agent anti-RD, 1.5 parts of cross-linking agent dicumyl peroxide, cross-linking aid Agent triallyl isocyanurate 1.2 parts, processing aid calcium stearate 1.5 parts.

[0022] At 80°C, first process ethylene-vinyl acetate copolymer, calcium stearate, and maleic anhydride grafted ethylene-vinyl acetate copolymer on a two-roller mill until the rolls are covered, and then add nitrile rubber, anti-RD, The flame retardant, smoke suppressant, reinforcing agent, and crosslinking agent are melted and blended for 15 minutes, and then discharged, and the mixed materia...

Embodiment 3

[0024] 30 parts of ethylene-vinyl acetate copolymer, 70 parts by mass of nitrile rubber, 25 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 60 parts of magnesium hydroxide after flame retardant modification, 5 parts of microcapsule red phosphorus , smoke suppressant molybdenum trioxide 2.5 parts, reinforcing agent zinc methacrylate 25 parts, anti-aging agent anti-RD 1.5 parts, cross-linking agent dicumyl peroxide 1.5 parts, cross-linking agent triallyl isocyanide 1.2 parts of uric acid ester, 1.5 parts of processing aid calcium stearate.

[0025] At 80°C, first process ethylene-vinyl acetate copolymer, calcium stearate, and maleic anhydride grafted ethylene-vinyl acetate copolymer on a two-roller mill until the rolls are covered, and then add nitrile rubber, anti-RD, The flame retardant, smoke suppressant, reinforcing agent, and crosslinking agent are melted and blended for 15 minutes, and then discharged, and the mixed material is molded and vulcanized on ...

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Abstract

The invention relates to a low-smoke fire-retardant high-strength high-oil-resistance cable sheath material which comprises the following raw materials in parts by weight: 20-50 parts of an ethylene-vinyl acetate copolymer, 40-70 parts of acrylonitrile-butadiene rubber, 15-35 parts of a polyolefin grafted material, 20-50 parts of a reinforcing agent, 40-80 parts of a fire retardant, 0.5-4 parts of a smoke inhibiting agent, 1-4 parts of an age resistor, 2-6 parts of a crosslinking agent and 1-3 parts of a processing agent. Surface modified magnesium hydrate, surface processed hydrotalcite, ammonium polyphosphate, a molecular sieve, microencapsulated red phosphorus and the like are compounded for carrying out inflaming retarding, thus the consumption of a fire retardant is reduced; the fuming of the low-smoke fire-retardant high-strength and high-oil resistance cable sheath material is improved by using a molybdenum series compound as a smoke inhibiting agent; and the mechanical property and the oil resistance of the low-smoke fire-retardant high-strength and high-oil resistance cable sheath material are improved by using zinc methacrylate as an oil-resistant reinforcing agent. The low-smoke fire-retardant high-strength and high-oil resistance cable sheath material is prepared.

Description

technical field [0001] The invention relates to a low-smoke, flame-retardant and oil-resistant cable sheath material, in particular to a low-smoke, flame-retardant, high-strength, high-oil-resistant cable sheath material and a preparation method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) has good mechanical properties, ozone resistance and good processability, but its oil resistance is poor. Nitrile rubber (NBR), as a general-purpose rubber, has excellent oil resistance. At the same time, there are polar groups in the NBR molecule, which can be well opposed to the polarity under the action of the compatibilizer maleic anhydride grafted polyolefin. Smaller EVA blends can be used as cable sheathing materials. However, in special environments such as the harsh operating environment of offshore oil platforms, the requirements for cable sheaths are also more stringent, so there are further requirements for the strength and oil resistance of mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L23/08C08L31/04C08L51/06H01B3/28H01B7/295C08K13/06C08K9/00C08K3/22C08K3/26C08K3/32C08K7/26C08K9/10C08K3/02
Inventor 张胜邹欢谷晓昱孙军董明哲刘喜山
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH