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Preparation method and application of a kind of phosphorus-nitrogen-carbon polymerized intumescent flame retardant

An intumescent flame retardant, polymeric technology, applied in the field of preparation of phosphorus-nitrogen-carbon polymeric intumescent flame retardant, can solve the problems of high solubility, high acidity, poor compatibility of polymer matrix, etc., to achieve The raw materials are environmentally friendly and non-toxic, the preparation method is environmentally friendly, and the preparation method is simple.

Active Publication Date: 2019-09-03
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since melamine polyphosphate only contains acid source and gas source, it often needs to be used in combination with some carbon source substances (such as pentaerythritol) in practical applications to have a better effect, and at the same time requires a higher amount of addition
Due to the small molecular weight of the melamine polyphosphate prepared by the traditional method, there are problems such as poor compatibility with the polymer matrix, high acidity and high solubility in water during use.

Method used

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  • Preparation method and application of a kind of phosphorus-nitrogen-carbon polymerized intumescent flame retardant
  • Preparation method and application of a kind of phosphorus-nitrogen-carbon polymerized intumescent flame retardant
  • Preparation method and application of a kind of phosphorus-nitrogen-carbon polymerized intumescent flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a phosphorus-nitrogen-carbon polymerization type intumescent flame retardant, the steps are:

[0031]Add 0.08mol melamine to the reaction vessel equipped with magnetic stirring, then add 160ml ethanol, stir and add 0.015mol phytic acid at 20°C, keep the system temperature constant after adding and continue stirring for 50 minutes, then pour the reaction solution into poly In a tetrafluoro reactor, react at a temperature of 120°C for 24 hours. After the reaction, pour out the reaction product, wash it with ethanol and then water several times until the pH is about 7 and no longer change, filter it with suction, and then dry it at a temperature of 60°C and a pressure of -0.08MPa for 10 hours to obtain a white solid product , that is, phosphorus-nitrogen-carbon polymerized intumescent flame retardant, referred to as PAMA1.

[0032] The X-ray diffraction pattern of this intumescent flame retardant (as figure 1 (b)) shows: the characteristic peak of...

Embodiment 2

[0034] A preparation method of phosphorus-nitrogen-carbon polymerized intumescent flame retardant, the steps are: add 0.09mol melamine to a reaction vessel equipped with magnetic stirring, then add 450ml of distilled water, stir and add 0.03mol After adding phytic acid, keep the temperature of the system constant and continue to stir for 40 minutes, then pour the reaction solution into a polytetrafluoro reactor, and react at a temperature of 90°C for 56 hours. After the reaction, the reaction product was poured out, washed with ethanol and then water for several times until the pH was about 7 and no longer changed, filtered with suction, and then dried at a temperature of 70°C and a pressure of -0.1MPa for 24 hours to obtain a white solid The product is the phosphorus-nitrogen-carbon polymerized intumescent flame retardant, referred to as PAMA2.

Embodiment 3

[0036] A preparation method of a phosphorus-nitrogen-carbon polymerized intumescent flame retardant, the steps are: add 0.15mol melamine to a reaction vessel equipped with magnetic stirring, then add 450ml of acetone, stir and add 0.01mol at 25°C After adding phytic acid, keep the temperature of the system constant and continue to stir for 20 minutes, then pour the reaction solution into a polytetrafluoro reactor, and react at a temperature of 70°C for 36 hours. After the reaction, pour out the reaction product, wash it with ethanol and then water for several times until the pH is about 7 and no longer change, filter it with suction, and then dry it for 8 hours at a temperature of 40°C and a pressure of -0.06MPa to obtain a white solid product , that is, phosphorus-nitrogen-carbon polymerized intumescent flame retardant, referred to as PAMA3.

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Abstract

The invention discloses a preparation method of a phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of a nano-sheet structure. The preparation method is characterized in that phytic acid, melamine and a solvent are prepared, the substance amount ratio of the phytic acid to the melamine is 1: 3 to 1: 15, and 20-50 ml of the solvent is added into every 0.01 mol of the melamine; the melamine is added into a reaction container provided with a thermometer and a stirrer, the solvent is added with stirring, the phytic acid is added at the temperature of 20-40 DEG C, and a reaction is conducted with stirring for 20-50 minutes, so that reaction liquid is obtained; and the reaction liquid is poured into a reaction still to react for 24-56 h at the temperature of 70-120 DEG C, cooling and suction filtration are conducted, solid is washed with ethyl alcohol and then washed with water till the pH is 7, and the solid is dried, so that the flame retardant is obtained. The preparation method is simple and environmentally friendly, and the synthesized phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of the nano-sheet structure has good compatibility with a polymer matrix and has good flame retardance.

Description

technical field [0001] The invention belongs to the preparation of a polymeric intumescent flame retardant, and relates to a preparation method and application of a phosphorus-nitrogen-carbon polymeric intumescent flame retardant. The phosphorus-nitrogen-carbon polymerized intumescent flame retardant prepared by the present invention has a nano-sheet structure, and is suitable for being added to a polymer (that is, a flame-retardant polymer material) as an additive flame retardant to improve the flame retardancy of the polymer It can also be used in combination with other types of flame retardants. Background technique [0002] In recent years, with the continuous development of science and technology, polymer materials have become an indispensable part of our daily life. While the use of polymer materials brings convenience, it also has corresponding problems. Since most polymer materials are easy to burn, it is very necessary to add flame retardants to them for flame reta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/02C08L85/02C08L63/00C08L55/02C08L23/12C08L23/06C08L77/00C08L67/06
Inventor 胡小平王鹏吉
Owner SOUTHWEAT UNIV OF SCI & TECH
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