Halogen-free phosphorus-free modified magnesium hydroxide flame retardant ethylene-vinyl acetate copolymer and preparation method thereof

A technology of vinyl acetate and magnesium hydroxide, applied in the treatment of dyed organic silicon compounds, dyed low-molecular organic compounds, fibrous fillers, etc., can solve the problem of low tensile strength and limiting oxygen index, and vertical combustion performance has not been reported , low elongation at break, etc., to achieve remarkable flame retardant effects, good application prospects, and good mechanical properties

Inactive Publication Date: 2012-05-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the defect of this method is: the elongation at break is relatively low and only reaches 23.7%.
However, the disadvantage of this method is that the tensile strength and limiting oxygen index are low
Obtain excellent mechanical properties and flame retardant properties of composite polymer materials. The elongation at break of the flame retardant composite material system is high, but the oxygen index is low, and the vertical combustion performance has not been reported.

Method used

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  • Halogen-free phosphorus-free modified magnesium hydroxide flame retardant ethylene-vinyl acetate copolymer and preparation method thereof
  • Halogen-free phosphorus-free modified magnesium hydroxide flame retardant ethylene-vinyl acetate copolymer and preparation method thereof
  • Halogen-free phosphorus-free modified magnesium hydroxide flame retardant ethylene-vinyl acetate copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100 grams of magnesium hydroxide powder, 15 grams of γ-aminopropyltriethoxysilane coupling agent and 300 grams of water are mixed, and the emulsion is obtained after cutting at 8000 r / min for 20 minutes at room temperature. Add tris(glycidyl) isocyanurate dissolved in absolute ethanol, of which the mass of tris(glycidyl) isocyanurate is 15 grams, and the mass of absolute ethanol is 100 grams, continue at room temperature Shear at 8000r / min for 10min, then transfer the mixed solution to a three-necked flask, heat and stir to react at a temperature of 80℃, stirring for 2.5 hours, cooling to room temperature, filtering, washing with water, drying, twisting and sieving (250 Mesh screen) to obtain halogen-free and phosphorus-free modified magnesium hydroxide powder with a yield of 99%;

[0030] Take 42 grams of halogen-free and phosphorus-free modified magnesium hydroxide powder, 7 grams of compatibilizer and 21 grams of ethylene-vinyl acetate copolymer pellets, and mix them in...

Embodiment 2

[0035] 100 grams of magnesium hydroxide powder, 5 grams of γ-aminopropyltrimethoxysilane coupling agent and 200 grams of water are mixed, and the emulsion is obtained after cutting at 5000 r / min for 10 minutes at room temperature. Add tris(glycidyl) isocyanurate dissolved in absolute ethanol, of which the mass of tris(glycidyl) isocyanurate is 5 grams, and the mass of absolute ethanol is 35 grams. Continue to room temperature Cut at 5000r / min for 10min, then transfer the mixed solution into a three-necked flask, heat and stir to react, the temperature is 60℃, the stirring time is 2 hours, cool to room temperature, filter, wash with water, dry, twist and crush, sieving (250 Mesh screen) to obtain halogen-free and phosphorus-free modified magnesium hydroxide powder with a yield of 99%;

[0036] Take 42 grams of halogen-free and phosphorus-free modified magnesium hydroxide powder, 7 grams of compatibilizer and 21 grams of ethylene-vinyl acetate copolymer) pellets, and mix them in an...

Embodiment 3

[0039] 100 grams of magnesium hydroxide powder, 10 grams of γ-aminopropyltriethoxysilane coupling agent and 350 grams of water are mixed, and the emulsion is obtained after cutting at 10000 r / min for 20 minutes at room temperature. Add tris(glycidyl) isocyanurate dissolved in absolute ethanol, of which the mass of tris(glycidyl) isocyanurate is 5 grams and the mass of absolute ethanol is 50 grams, continue to room temperature Shear at 10000r / min for 10min, then transfer the mixed solution to a three-necked flask, heat and stir to react at a temperature of 80℃, stirring for 3 hours, cool to room temperature, filter, wash with water, dry, twist and crush, sieving (250 Mesh screen) to obtain halogen-free and phosphorus-free modified magnesium hydroxide powder with a yield of 98%;

[0040] Take 42 grams of halogen-free and phosphorus-free modified magnesium hydroxide powder, 7 grams of compatibilizer and 21 grams of ethylene-vinyl acetate copolymer pellets, and mix them in an interna...

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Abstract

The invention relates to a halogen-free phosphorus-free modified magnesium hydroxide flame retardant ethylene-vinyl acetate copolymer and a preparation method thereof. The copolymer comprises 25 wt% to 33 wt% of ethylene-vinyl acetate copolymer grains, 55 wt% to 65 wt% of halogen-free phosphorus-free modified magnesium hydroxide powder and 2 wt% to 12 wt% of EVA-D4085 compatibilizer. The preparation method comprises the steps of: cutting the magnesium hydroxide powder, silane coupling agent containing amino group, and water at a high speed; adding three (epoxypropyl)-isocyanurate dissolved inanhydrous alcohol and continuously cutting at room temperature at a high speed; heating, stirring and reacting to obtain halogen-free phosphorus-free modified magnesium hydroxide powder; and uniformly mixing the modified magnesium hydroxide powder, the ethylene-vinyl acetate copolymer grains and the EVA-D4085 compatibilizer to obtain the required copolymer. The composite material has the advantages of obvious flame retardant effect, good mechanical property, simple preparation technology, low cost and convenient operation, and is beneficial to realizing industrial production.

Description

Technical field [0001] The invention belongs to the field of magnesium hydroxide flame-retardant ethylene-vinyl acetate copolymer and a preparation method thereof, and particularly relates to a halogen-free and phosphorus-free modified magnesium hydroxide flame-retardant ethylene-vinyl acetate copolymer and a preparation method thereof. Background technique [0002] With the development of the plastics industry, the requirements for flame retardants have increased. Therefore, the need for flame retardants is also urgent. In today's society, people's environmental awareness and environmental protection efforts are strengthened, and a non-toxic, smoke-suppressing inorganic flame retardant is needed. [0003] Ethylene-vinyl acetate copolymer (EVA), which has good flexibility, impact resistance, environmental stress resistance, and good compatibility with fillers and flame retardants. It can be widely used in home appliances, construction, building materials, cable insulation, etc. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L31/04C08L51/00C08L51/06C08K9/06C08K9/04C08K3/22C09C1/02C09C3/12C09C3/08
Inventor 虞鑫海霍蛟龙赵炯心
Owner DONGHUA UNIV
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