Nano-Mg-Al hydrotalcite fire-retardant EVA foaming material and preparation method thereof

A technology of magnesium-aluminum hydrotalcite and foaming material, which is applied in the field of inorganic nano-scale magnesium-aluminum hydrotalcite composite flame-retardant EVA foaming material and its preparation field, can solve the problems such as the preparation method of the foaming material which is not mentioned, and achieve the improvement of vertical Combustion properties, improved mechanical and flame retardant properties, the effect of expanding the range of applications

Inactive Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent also does not mention the foam material and its preparation method

Method used

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  • Nano-Mg-Al hydrotalcite fire-retardant EVA foaming material and preparation method thereof
  • Nano-Mg-Al hydrotalcite fire-retardant EVA foaming material and preparation method thereof
  • Nano-Mg-Al hydrotalcite fire-retardant EVA foaming material and preparation method thereof

Examples

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preparation example Construction

[0038] (2) Preparation of nanoscale magnesium aluminum hydrotalcite:

[0039] (1) Prepare solution A: Accurately weigh 81.33gMgSO according to the magnesium-aluminum molar ratio of 3 4 ·7H 2 O and 41.55gAl(NO 3 ) 3 9H 2 Put O in a beaker, add a small amount of water and stir to dissolve, transfer to a 250mL volumetric flask, shake to a constant volume, and set aside. (2) Configuration solution B (pH buffer): Weigh about 35.44g NaOH and 5.87g anhydrous Na 2 CO 3 Place in a beaker, add a small amount of water and stir to dissolve, transfer to a 250mL volumetric flask, shake to a constant volume, and set aside. (3) Take two constant-pressure dropping funnels and inject A and B solutions respectively for later use. (4) Add 200mL of distilled water to a 1L three-neck flask, control the water temperature at 60°C, stir vigorously, add solution A and solution B into the flask at the same time, and the addition is completed within 30 minutes. During the addition, the pH of the s...

Embodiment 1

[0041] Put 70 parts of ethylene vinyl acetate copolymer with a VA content of 14%, 0.5 part of stearic acid, 0.5 part of zinc stearate, 0.8 part of zinc oxide and 5 parts of talcum powder into a preheated internal mixer for mixing, After the temperature rises to 100°C, turn the material every 5°C; after rising to 115°C within 10 minutes, add 1 part of DCP, 6.5 parts of AC and 30 parts of nano-sized aluminum-magnesium hydrotalcite, and continue mixing for 5 minutes, every 2 ℃ Turn the material once, and the temperature rises to 120 ℃.

[0042] The roller mill is preheated to 90°C, the roller distance is 15mm, the mixed material is mixed twice in the form of a triangular bag, and then passed through the 1mm roller distance for three times, and then the sheet is released, and the sheet size is 110×30×0.1 cm, and stacked neatly.

[0043] Cut the pieces according to the shape of the mold, accurately weigh enough materials according to the modulus capacity, and fill the mold with ho...

Embodiment 2

[0045] Put 70 parts of ethylene vinyl acetate copolymer with a VA content of 18%, 0.5 part of stearic acid, 0.5 part of zinc stearate, 0.8 part of zinc oxide and 5 parts of talcum powder into a preheated internal mixer for mixing, After the temperature rises to 100°C, turn the material every 5°C; after rising to 115°C within 10 minutes, add 0.7 parts of DCP, 6.5 parts of AD300 and 30 parts of nano-scale aluminum-magnesium hydrotalcite, and continue mixing for 5 minutes, every Turn the material once every 2°C, and the temperature rises to 120°C.

[0046] The roller mill is preheated to 90°C, the roller distance is 15mm, the mixed material is mixed twice in the form of a triangular bag, and then passed through the 1mm roller distance for three times, and then the sheet is released, and the sheet size is 110×30×0.1 cm, and stacked neatly.

[0047] Cut the pieces according to the shape of the mold, accurately weigh enough materials according to the modulus capacity, and fill the ...

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Abstract

The present invention relates to a nano-Mg-Al hydrotalcite fire-retardant EVA foaming material comprising, by weight, 60-90 parts of an ethylene-vinyl acetate copolymer with 10-22wt% of VA, 2-10 parts of a foaming agent, 0.5-1 part of a foaming accelerator, 0.3-5 parts of a coupling agent, 0.5-1 part of a crosslinking agent, 10-50 parts of a flame retardant and 0.5-2 parts of a releasing agent, and the flame retardant is nano-Mg-Al hydrotalcite. Compared with traditional metal hydroxide flame retardants, the nano-Mg-Al hydrotalcite has great advantages in improvement of the limiting oxygen index, improvement of vertical combustion performances and reduction of heat release rate and other flame retardant aspects, and is better fire-retardant inhibitor. The present invention also provides a preparation method of the foaming material, and the method is simple to operate, the foaming process is not needed to be further modified or changed, production cost can be reduced, and energy can be saved.

Description

technical field [0001] The invention relates to a flame-retardant foaming material and a preparation method thereof, in particular to an inorganic nano-scale magnesium-aluminum hydrotalcite composite flame-retardant EVA foaming material and a preparation method thereof. Background technique [0002] Ethylene-vinylacetate copolymer (ethylene-vinylacetatecopolymer), referred to as EVA, performance and vinyl acetate (VA) content, VA mass fraction of 5% to 40% is generally called EVA resin. Due to the introduction of vinyl acetate (VA) monomer into the molecular chain, the crystallinity is reduced, the flexibility, impact resistance, compatibility with fillers and heat sealing performance are improved, and it has better resistance to environmental stress cracking, good Due to its excellent optical performance, low temperature resistance and non-toxic properties, it is widely used in foaming materials, functional shed films, packaging films, hot melt adhesives, wires and cables, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/02C08K3/22C08K5/548C08K5/544C08K5/098C08K5/14C08K3/34C08K3/36C08K3/26C08J9/10C08J9/08
Inventor 殷杰黄文氢
Owner CHINA PETROLEUM & CHEM CORP
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