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Preparation method of EVA nano flame-retardant compound based on magnesium/zinc/boron/nitrogen synergy

A nano flame retardant and composite technology, applied in the field of nano materials, can solve the problem of low flame retardant efficiency of EVA/MH system, and achieve the effects of slowing heat/mass exchange, improving mechanical properties, reducing heat release and smoke release

Active Publication Date: 2021-11-12
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of low flame retardant efficiency of the EVA / MH system, to exert the synergistic effect between different nanomaterials, and to provide an ethylene-vinyl acetate copolymer nanomaterial based on magnesium / zinc / boron / nitrogen synergy Flame Retardant Compound

Method used

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  • Preparation method of EVA nano flame-retardant compound based on magnesium/zinc/boron/nitrogen synergy
  • Preparation method of EVA nano flame-retardant compound based on magnesium/zinc/boron/nitrogen synergy
  • Preparation method of EVA nano flame-retardant compound based on magnesium/zinc/boron/nitrogen synergy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An ethylene-vinyl acetate copolymer flame-retardant composite material, based on the total mass of the composite material as 100%, the components and mass percentages are as follows:

[0036]

[0037]

[0038] Specific steps are as follows:

[0039] (1) Dry ethylene-vinyl acetate copolymer, compatibilizer, magnesium hydroxide, and processing aids in an oven at 60°C, and then mix all raw materials in an internal mixer for 15 minutes. The temperature is 175°C, the rotation speed is 70rpm, and the mixed sample is preliminarily pressed into a sheet using a double-roll mill, and the roller temperature is 105°C.

[0040] (3) The sheet is hot-pressed with a preset program by a flat vulcanizer, and the molding temperature is 150°C.

[0041] Test results: vertical combustion V-1 level, oxygen index 36.2%. Cone calorimeter test results show that the peak heat release rate is 180.84kW / m 2 , the total smoke release rate is 584.66m 2 / m 2 , 47.90% of residual carbon quali...

Embodiment 2

[0043] An ethylene-vinyl acetate copolymer flame-retardant composite material, based on the total mass of the composite material as 100%, the components and mass percentages are as follows:

[0044]

[0045] Specific steps are as follows:

[0046] (1) Dry ethylene-vinyl acetate copolymer, compatibilizer, magnesium hydroxide, and processing aids in an oven at 60°C, and then mix all raw materials in an internal mixer for 15 minutes. The temperature is 150°C, the rotation speed is 80rpm, and the mixed sample is preliminarily pressed into a sheet using a double-roll mill, and the roller temperature is 105°C.

[0047] (3) The sheet is hot-pressed with a preset program by a flat vulcanizer, and the molding temperature is 150°C. Test results: vertical combustion V-1 level, oxygen index 36.0%. Cone calorimeter test results show that the peak heat release rate is 185.14kW / m 2 , the total smoke release rate is 610.34m 2 / m 2 , residual carbon mass 47.54%. The tensile strength is ...

Embodiment 3

[0049] An ethylene-vinyl acetate copolymer flame-retardant composite material, based on the total mass of the composite material as 100%, the components and mass percentages are as follows:

[0050]

[0051] Specific steps are as follows:

[0052] (1) Dry ethylene-vinyl acetate copolymer, compatibilizer, magnesium hydroxide, and processing aids in an oven at 60°C, and then mix all raw materials in an internal mixer for 20 minutes. The temperature is 150°C, the rotation speed is 80rpm, and the mixed sample is preliminarily pressed into a sheet using a double-roll mill, and the roller temperature is 110°C.

[0053] (3) The sheet is hot-pressed with a preset program by a flat vulcanizer, and the molding temperature is 150°C.

[0054] Test results: vertical combustion V-0 level, oxygen index 36.5%. Cone calorimeter test results show that the peak heat release rate is 169.14kW / m 2 , the total smoke release rate is 362.59m 2 / m 2 , The residual carbon mass is 50.88%. The te...

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Abstract

The invention relates to a preparation method of an EVA nano flame-retardant compound based on magnesium / zinc / boron / nitrogen synergy, and belongs to the technical field of nano materials and the field of flame retardance. According to the invention, nano hexagonal boron nitride and nano zinc oxide are applied to an ethylene-vinyl acetate copolymer, so that the vertical combustion grade of the composite material is higher, the oxygen index is obviously improved, and the peak value of the heat release rate and the smoke release rate are obviously reduced. It is illustrated that the nano hexagonal boron nitride, the nano zinc oxide and the magnesium hydroxide can generate an efficient synergistic flame retardant effect, the flame retardant property is better after the nano hexagonal boron nitride and the nano zinc oxide are compounded, the condensed phase char formation behavior can be more effectively improved in the combustion process, and the flame retardant property of the material is improved.

Description

technical field [0001] The invention relates to a flame-retardant ethylene-vinyl acetate copolymer composited with magnesium hydroxide and nano-hexagonal boron nitride or nano-zinc oxide and a preparation method thereof, belonging to the technical field of nanometer materials and the field of flame retardancy. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) is produced by copolymerization of ethylene and vinyl acetate. Because of its good flexibility, low temperature toughness, stress crack resistance and weather resistance, etc., and EVA is easy to process and shape, its application field is very It is widely used in hot melt adhesives, packaging and wire and cable fields. At present, EVA not only has requirements for flame retardancy, but also has higher and higher requirements for its safety and environmental protection. Therefore, the halogen-free flame retardancy of EVA is becoming more and more important. At present, the flame retardant of EVA is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08L23/06C08K3/22C08K3/38
CPCC08L23/0853C08L2201/02C08K2003/2224C08K2003/385C08K2003/2296C08K2201/011C08L2207/066C08L51/06C08L23/06C08L23/0815C08K3/22C08K3/38
Inventor 李定华宋恪淳杨荣杰刘雄军沈清李虹昆程博
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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