Phosphorus-nitrogen composite flame retardant, and preparation method and application thereof

A composite flame retardant technology, applied in the field of fine chemicals, can solve problems such as poor water resistance, flammability of aluminum hypophosphite, poor compatibility, etc., achieve good hydrophobic properties, improve flame retardant performance, and ensure physical properties Effect

Inactive Publication Date: 2020-09-15
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that aluminum hypophosphite is flammable, poor in water resistance and poor in compatibility with polymers, the present invention provides a preparation method and application of a phosphorus-nitrogen composite flame retardant. A dense nitrogen-containing coating layer is formed on the surface of aluminum phosphate crystals, which improves the water resistance and thermal stability of aluminum hypophosphite, and at the same time reduces the risk of flammability during processing and transportation. The flame retardant synergistic system of nitrogen makes it have higher flame retardant efficiency

Method used

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  • Phosphorus-nitrogen composite flame retardant, and preparation method and application thereof
  • Phosphorus-nitrogen composite flame retardant, and preparation method and application thereof
  • Phosphorus-nitrogen composite flame retardant, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0029] Preparation of Example 1 Phosphorus Nitrogen Composite Flame Retardant A

[0030] (1) Add 8 parts of water to the reaction kettle 1, start stirring, and raise the temperature to 95°C, then add 2 parts of hexamethylolmelamine to the reaction kettle, and add 0.8% hexamethylolmelamine mass fraction at the same time The anti-reverse agent melamine, continuous stirring to completely dissolve the hexamethylol melamine.

[0031] (2) Add 8 parts of water into the reaction kettle 2, start stirring and add 3 parts of aluminum hypophosphite, and continue stirring to obtain aluminum hypophosphite slurry.

[0032] (3) Add the aluminum hypophosphite slurry obtained in (2) into the reaction kettle 1, keep stirring, and add 0.08 parts of acetic acid dropwise to adjust the pH of the reaction solution to 4, continue the reaction at 95°C for 8 hours, and then Filtration, washing, and drying to obtain a phosphorus-nitrogen composite flame retardant. The obtained product A has an average ...

Embodiment 2

[0036] Preparation of Example 2 Phosphorus Nitrogen Composite Flame Retardant B

[0037] (1) Add 7 parts of water to the reaction kettle 1, start stirring, and raise the temperature to 85°C, then add 1.8 parts of hexamethylolmelamine to the reaction kettle, and add 0.8% hexamethylolmelamine mass fraction at the same time The anti-reverse agent melamine, continuous stirring to completely dissolve the hexamethylol melamine.

[0038] (2) Add 7 parts of water into the reaction kettle 2, start stirring and add 4.2 parts of aluminum hypophosphite, and continue stirring to obtain aluminum hypophosphite slurry.

[0039] (3) Add the aluminum hypophosphite slurry obtained in (2) into the reaction kettle 1, keep stirring, and dropwise add 0.06 parts of acetic acid to adjust the pH of the reaction solution to 3.5, and continue to react at 85°C for 7.5 hours. Suction filtration, washing, and drying to obtain a phosphorus-nitrogen composite flame retardant. The obtained product B has an a...

Embodiment 3

[0040] Preparation of Example 3 Phosphorus Nitrogen Composite Flame Retardant C

[0041] (1) Add 6 parts of water to the reaction kettle 1, start stirring, and raise the temperature to 105°C, then add 1.5 parts of hexamethylolmelamine to the reaction kettle, and add 0.8% hexamethylolmelamine mass fraction at the same time The anti-reverse agent melamine, continuous stirring to completely dissolve the hexamethylol melamine.

[0042] (2) Add 9 parts of water into the reaction kettle 2, start stirring and add 4.5 parts of aluminum hypophosphite, and continue stirring to obtain aluminum hypophosphite slurry.

[0043] (3) Add the aluminum hypophosphite slurry obtained in (2) into the reaction kettle 1, keep stirring, and dropwise add 0.1 part of acetic acid to adjust the pH of the reaction solution to 4.5, continue the reaction at 105°C for 6 hours, and then pump Filtration, washing, and drying to obtain a phosphorus-nitrogen composite flame retardant. The average particle diamet...

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Abstract

The invention discloses a preparation method and application of a phosphorus-nitrogen composite flame retardant. The phosphorus-nitrogen composite flame retardant is prepared from hexamethylol melamine, aluminum hypophosphite, melamine and acetic acid. The preparation method comprises the following steps: adding aluminum hypophosphite slurry into a hexamethylolmelamine solution, and adding aceticacid to adjust the pH value of the system to make the surface of the aluminum hypophosphite crystal structure wrapped by a nitrogen layer, thereby finally forming the phosphorus-nitrogen composite flame retardant. The method is simple in process, and the prepared phosphorus-nitrogen composite flame retardant is high in ignition point, good in water resistance and capable of improving compatibilityand flame retardance with a base material when applied to engineering plastics.

Description

technical field [0001] The invention relates to a phosphorus-nitrogen composite flame retardant, a preparation method and application thereof, and belongs to the technical field of fine chemicals. Background technique [0002] Aluminum hypophosphite is a typical phosphorus-based environmentally friendly flame retardant, which has the advantages of halogen-free, low toxicity, and low smoke. It is widely used in engineering plastics, rubber, coating materials, epoxy resin and other polymer materials. However, phosphorus-based flame retardants are flammable, and are prone to safety accidents during the production process, and their high solubility leads to poor compatibility with polymers, and migration and precipitation will occur during the application process. This limits its application range and application effect to a certain extent. [0003] Patent CN201810387232.5 discloses a water-based microencapsulated ultra-thin steel structure fireproof coating. This invention us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/32C08K5/3492C08L75/04C08L67/02
CPCC08K3/32C08K5/34922C08K9/10C08K2201/003C08L2201/02C08L75/04C08L67/02
Inventor 王鲁静李树新肖学文耿建刚段金凤徐亮索伟姜艳岭王艳辉刘婷宋传君
Owner JINAN TAIXING FINE CHEM
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