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Intercalation hydrotalcite fire retardant and preparation method thereof

A technology of hydrotalcite and flame retardant, which is applied in the field of intercalated hydrotalcite flame retardant and its preparation, can solve the problems of poor heat resistance, large smoke generation, poor polymer compatibility, etc., and achieves improved strength and flame retardancy. performance, the effect of improving compatibility

Inactive Publication Date: 2012-08-01
SUZHOU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its poor compatibility with polymers, large smoke generation, and poor heat resistance limit its application (see Zhou Yixiao, Yang Li, Bi Chengliang, etc. Status and Prospects of Phosphorous Flame Retardants[J]. Tianjin Chemical Industry, 2009,1,23(1):1-4.)

Method used

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  • Intercalation hydrotalcite fire retardant and preparation method thereof
  • Intercalation hydrotalcite fire retardant and preparation method thereof
  • Intercalation hydrotalcite fire retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: preparation process sees appendix figure 1 :

[0025] (1) Add 100 mL of water, 1.26 g of melamine and 0.9 g of low-polymerization paraformaldehyde into a 250 mL three-neck flask, stir well, heat to 80°C in a water bath, and react for 0.5 h to obtain solution A.

[0026] (2) Dissolve 12.18g of magnesium chloride and 6.66g of aluminum sulfate in 50ml of water to form solution B; dissolve 6.4g of sodium hydroxide and 1.06g of sodium carbonate in 50ml of water to form solution C. At the same time, solutions B and C were added dropwise to the above solution A, and the reaction was stirred for 0.5h.

[0027] (3) Adjust the pH value to 7 with hydrochloric acid, reflux at 80°C for 2 hours, filter while hot, wash with hot water until nearly neutral, and dry the product in an oven at 105°C for 24 hours to obtain the product.

[0028] Carry out XRD analysis to the obtained product, such as figure 2 , the (003), (006) and (009) crystal plane characteristic diffr...

Embodiment 2

[0031] Example two, testing the flame retardancy and mechanical properties of the intercalated hydrotalcite flame retardant

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Abstract

The invention discloses a preparation method of intercalation hydrotalcite fire retardant, which is characterized by comprising the following steps of: (1) obtaining solution A of a melamine-formaldehyde prepolymer through reaction of melamine and paraformaldehyde with low degree of polymerization; (2) preparing water solution B containing aluminium ions and magnesium ions, wherein the molar ratio of the aluminium ions to the magnesium ions is 1:3, and preparing aqueous alkali C; and (3) dropwise adding the solution B and the solution C in the solution A simultaneously, reacting to obtain pillared layered double hydroxides, regulating a pH value to be 5-7, continuing to react, and polymerizing to form the melamine-formaldehyde resin intercalation hydrotalcite to obtain the intercalation hydrotalcite fire retardant. According to the method, the polymer is intercalated in hydrotalcite layers to synthesize the inorganic / organic composite intercalation hydrotalcite fire retardant, whichhas better compatibility with high polymer compared with the hydrotalcite, so that the strength and the flame retardant property of the high polymer can be improved.

Description

technical field [0001] The invention relates to a flame retardant and a preparation method thereof, in particular to an inorganic and organic intercalation hydrotalcite flame retardant and a preparation method thereof. Background technique [0002] At present, flame retardants for flame retardant polymer materials mainly include halogenated flame retardants, inorganic flame retardants and phosphorus flame retardants. Although halogenated flame retardants have good flame retardant effects, they will produce a large amount of toxic gases and smoke when they burn and decompose, which not only seriously threatens human health, but also pollutes the environment, which has aroused people's vigilance. Therefore, halogenated flame retardants are being gradually replaced. Inorganic flame retardants mainly include magnesium hydroxide, hydrotalcite, zinc oxide, kaolin, expandable graphite, etc. These flame retardants have good flame retardant, smoke elimination, filling, etc., and are...

Claims

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Application Information

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IPC IPC(8): C08L61/28C08L63/02C08K3/16C08K3/30C08K3/22C08K3/26
Inventor 董延茂朱玉刚姚社春
Owner SUZHOU UNIV OF SCI & TECH
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