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Phosphorus and nitrogen fire retardant and preparation method thereof

A technology of phosphorus-nitrogen flame retardants and solvents, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the treatment of dyed polymer organic compounds, and fire-resistant coatings. Larger, shortened flame retardant aging and other issues, to achieve the effect of low cost, easy to obtain raw materials, and reduce the amount of use

Inactive Publication Date: 2012-12-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defects of this method are: the polarity of the inorganic flame retardant is very strong, and the compatibility with the polymer material is very poor, which has a great influence on the mechanical properties of the polymer; In the environment, it is easy to migrate to the surface of the polymer (return frost) and lose it, which has a great impact on the flame retardancy and shortens the time limit of flame retardancy

Method used

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  • Phosphorus and nitrogen fire retardant and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0024] 1) Stir the type I ammonium polyphosphate and water together evenly, prepare 1000g of suspension slurry with a concentration of 50%, and stir evenly at a temperature of 30°C;

[0025] 2) Prepare a melamine formaldehyde solution at a molar ratio of 1:15, and react at a temperature of 30°C for 60 minutes to form a prepolymer;

[0026] 3) Quickly add the prepolymer produced by the above reaction to the slurry in the first step, the amount added is 30% of the ammonium polyphosphate, and stir evenly with water as the dispersant; then keep warm for 2 hours;

[0027] 4) Filter or centrifugally dehydrate the above product, wash it twice with deionized water, and re-dehydrate, dry, and pulverize the filtered solid-phase product to obtain a phosphorus-nitrogen flame retardant.

Embodiment 2

[0029] 1) Stir the type I ammonium polyphosphate and ethanol evenly together to prepare 1000g of suspension slurry with a concentration of 5%, and stir evenly at a temperature of 120°C;

[0030] 2) Prepare a melamine formaldehyde solution at a molar ratio of 1:3, and react at a temperature of 120°C for 15 minutes to form a prepolymer;

[0031] 3) Quickly add the prepolymer produced by the above reaction into the slurry in the first step, the amount added is 50% of the ammonium polyphosphate, and stir evenly with ethanol as the dispersant; then keep warm for 2 hours;

[0032] 4) Filter or centrifuge the above product, wash it with deionized water for 5 times, re-dehydrate the filtered solid phase product, dry and pulverize to obtain a phosphorus nitrogen flame retardant.

Embodiment 3

[0034] 1) According to type I: type II = 1:1 weight ratio, ammonium polyphosphate and water are stirred together evenly, and prepared into 1000g of suspension slurry with a concentration of 30%, and stirred evenly at a temperature of 120°C;

[0035] 2) Prepare a melamine formaldehyde solution at a molar ratio of 1:6, and react at a temperature of 80°C for 30 minutes to form a prepolymer;

[0036] 3) Quickly add the prepolymer produced by the above reaction into the slurry in the first step, the addition amount is 35% of the ammonium polyphosphate, and stir evenly with water as the dispersant; then keep warm for 3 hours;

[0037] 4) Filter or centrifugally dehydrate the above product, wash it with deionized water for 3 times, and re-dehydrate the filtered solid phase product, dry and pulverize to obtain a phosphorus-nitrogen flame retardant.

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Abstract

The invention discloses a phosphorus and nitrogen fire retardant and a preparation method of the phosphorus and nitrogen fire retardant. The preparation method is characterized by comprising the steps of: preparing suspended slurry with concentration of 5-50% by 1-20 parts by weight of ammonium polyphosphate and 20-40 parts by weight of solvent, and agitating uniformly at 30-120 DEG C; preparing melamine and formaldehyde solution according to a molar ratio of 1:3-15, and reacting for 15-130min at 30-120 DEG C; preparing a pre-polymer; adding the melamine formaldehyde resin pre-polymer into the slurry quickly, wherein the adding amount is 5-70% of ammonium polyphosphate, and agitating uniformly by using the solvent as a dispersing agent; then insulating and reacting for 2-5h; obtaining a phosphorus and nitrogen fire retardant product; then filtering or centrifugally dewatering the product, washing the product by deionized water for 2-5 times, re-hydrating solid phase product filtered, and smashing the product to obtain the phosphorus and nitrogen fire retardant. The production process of the compound fire retardant is simple, the raw materials are easy to obtain, and the preparation method is convenient to operate and low in cost, and is beneficial for industrialized production.

Description

technical field [0001] The invention relates to a phosphorus-nitrogen flame retardant and a preparation method thereof, belonging to the field of functional polymer materials Background technique [0002] Polymer materials are generally combustible or flammable, which are easy to cause fire accidents and have become the main ignition material for fires. In order to ensure the safety of polymer materials, the most effective way is to add flame retardants (FR) to the materials to reduce their flammability and suppress the generation of smoke or toxic gases during combustion. There are many kinds of flame retardants, among which halogenated flame retardants are the most used, especially brominated flame retardants (BFR). In 1986, Swiss research institutions discovered the Dioxins problem of halogenated flame retardants, that is, polybrominated diphenyl ethers and their flame-retardant polymers were thermally decomposed at 510-630°C to produce toxic polybrominated diphenyl ethe...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/04C08K3/32C09C3/10C08G12/32D01F1/07C09D5/18
Inventor 杨林周健张志业王辛龙
Owner SICHUAN UNIV
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