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Hybrid fire retardant and preparing method thereof

A flame retardant and hybridization technology, which is applied in the field of hybrid flame retardants and their preparation, can solve the problems of low flame retardant efficiency, affecting the application of high polymers, and the impact of high polymer mechanical properties, and achieve high flame retardancy Effect

Inactive Publication Date: 2012-09-26
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its flame retardant efficiency is relatively low, and the addition amount needs to reach more than 50% of the matrix to play a role, and such a high addition amount will have a great impact on the mechanical properties of the polymer, and then affect the application of the polymer.

Method used

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  • Hybrid fire retardant and preparing method thereof
  • Hybrid fire retardant and preparing method thereof
  • Hybrid fire retardant and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Measure 0.37ml of 37% formaldehyde solution (0.005mol), dilute it with 20ml of water and adjust the pH value to 8-9, add 0.63g (0.005mol) of melamine, stir well at 70°C until the liquid surface is clear , to obtain melamine formaldehyde prepolymer.

[0028] (2) Weigh 20.3g bittern, dissolve it in deionized water, add 1-2ml H 2 o 2 , after fully stirring, let it stand still, filter to obtain the filtrate after 4-5h, and adjust the pH to 2.5 after constant volume in a 200ml volumetric flask.

[0029] (3) Put the above-mentioned 200ml of bittern in a three-necked flask with condensing reflux and stirring, fully stir at 70°C and 300r / min, and add the melamine formaldehyde prepolymer obtained in step (1) dropwise into bittern In the brine, when the liquid level changes from transparent to light blue or white after the addition, quickly lower the temperature to 25°C and increase the speed to 500r / min at the same time. After the temperature stabilizes for 10 minutes, sta...

Embodiment 2

[0031] (1) Measure 0.92ml of 37% formaldehyde solution (0.0125mol), dilute it with 20ml of water and adjust the pH value to 8-9, add 0.63g (0.005mol) of melamine, stir well at 70°C until the liquid surface is clear , to obtain melamine formaldehyde prepolymer.

[0032] (2) Weigh 20.3g bittern, dissolve it in deionized water, add 1-2ml H 2 o 2 , after fully stirring, let it stand still, filter to obtain the filtrate after 4-5h, and adjust the pH to 2.5 after constant volume in a 200ml volumetric flask.

[0033] (3) Put the above-mentioned 200ml of bittern in a three-necked flask with condensing reflux and stirring, fully stir at 70°C and 300r / min, and add the melamine formaldehyde prepolymer obtained in step (1) dropwise into bittern In the brine, when the liquid level changes from transparent to light blue or white after the addition, quickly lower the temperature to 25°C and increase the speed to 500r / min at the same time. After the temperature stabilizes for 10 minutes, st...

Embodiment 3

[0035] (1) Measure 2.21ml of 37% formaldehyde solution (0.03mol), dilute it with 40ml of water and adjust the pH value to 8-9, add 2.52g (0.005mol) of melamine, stir well at 70°C until the liquid surface is clear , to obtain melamine formaldehyde prepolymer.

[0036] (2) Weigh 20.3g bittern, dissolve it in deionized water, add 1-2ml H 2 o 2 , after fully stirring, let it stand still, filter to obtain the filtrate after 4-5h, and adjust the pH to 2.5 after constant volume in a 200ml volumetric flask.

[0037] (3) Put the above-mentioned 200ml bittern solution in a three-neck flask with condensing reflux and stirring, fully stir at 70°C and 300r / min, measure 20ml of the melamine formaldehyde prepolymer obtained in step (1) dropwise Add it into the bittern solution, and when the liquid level changes from transparent to light blue or white after the addition, quickly lower the temperature to 25°C and increase the speed to 500r / min, and start adding ammonia water dropwise after t...

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Abstract

The invention relates to the technical field of a hybrid fire retardant and relates to the hybrid fire retardant and a preparing method thereof. The hybrid fire retardant, which is mainly used as an adding type fire retardant, can be added to a polymer material. A nano-scale melamine formaldehyde polycondensate is synthesized in an acid bittern solution, and the melamine formaldehyde polycondensate is used as a nucleating agent used in the synthesis process of magnesium hydroxide so as to prepare a magnesium hydroxide / nano-scale melamine formaldehyde polycondensate hybrid fire retardant. According to the invention, a magnesium hydroxide fire retardant is provided, and at the same time a fire retardant element N is added, thus the hybrid fire retardant synthesized by using the method is high in fire retardant efficiency, simple in synthesis method and better in market prospect.

Description

technical field [0001] The invention relates to the technical field of hybrid flame retardants, and relates to a hybrid flame retardant and a preparation method thereof. Background technique [0002] Magnesium hydroxide is a halogen-free, environmentally friendly additive flame retardant, which is increasingly used in flame-retardant polymers. It is mainly through (a) absorbing the heat of the combustion area, (b) releasing water vapor by thermal decomposition, (c) forming a charcoal layer while reducing the generation of smoke, (d) forming metal oxides to isolate the contact between polymer materials and oxygen, etc. Exhibits excellent flame and smoke suppression properties. However, its flame retardant efficiency is relatively low, and the addition amount needs to reach more than 50% of the matrix to play a role, and such a high addition amount will have a great impact on the mechanical properties of the polymer, and then affect the application of the polymer. [0003] M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/14C08L61/28C08K3/22C08G12/32
Inventor 王标兵李庆蛟
Owner CHANGZHOU UNIV
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