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Efficient nitrogen-phosphorus fire retardant and preparation method thereof

A nitrogen-phosphorus flame retardant and high-efficiency technology, applied in the field of organic chemical synthesis, can solve problems such as environmental pollution, and achieve the effects of low price, sufficient raw material sources, and easy preparation

Inactive Publication Date: 2012-09-12
刘方旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, more and more attention is paid to the research and development of fire retardants at home and abroad. Traditional halogen-containing flame retardants will produce harmful gases when burned and pollute the environment, while reactive flame retardants have good stability. , is not easy to lose, and has the advantages of low toxicity, especially the preparation method of a high-efficiency nitrogen-phosphorus flame retardant that can be obtained as a white polyphosphoric acid (salt) solid by using the condensation reaction of a mixture of phosphoric acid, urea and melamine, and then after polymerization and curing. No data and reports have been seen so far

Method used

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  • Efficient nitrogen-phosphorus fire retardant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In a container equipped with stirring, add 12 kg of 85% phosphoric acid, 6 g of urea and 9 kg of melamine, mix and stir, heat to 80°C to 90°C, react for 2 hours, and then fully stir to obtain a pretreatment solution;

[0013] Put the pretreatment solution into a high-temperature heating box, raise the temperature to 200°C to 260°C, and react for 7 hours. After polymerization and solidification, stop heating, and after cooling, a high-efficiency nitrogen-phosphorus flame retardant of white polyphosphoric acid (salt) can be obtained.

Embodiment 2

[0015] In a container equipped with stirring, add 55 kg of 80% phosphoric acid, 22 kg of urea and 55 kg of melamine, mix and stir, heat to about 85°C, react for 3 hours, and then fully stir to obtain a pretreatment solution;

[0016] Put the pretreatment solution into a high-temperature heating box, raise the temperature to 250°C, and react for 8 hours. After polymerization and solidification, stop heating, and after cooling, a high-efficiency nitrogen-phosphorus flame retardant of polyphosphoric acid (salt) can be obtained.

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Abstract

The invention discloses an efficient nitrogen-phosphorus fire retardant and a preparation method thereof. The efficient nitrogen-phosphorus fire retardant which is a white polyphosphoric acid (polyphosphate) solid is generated through carrying out a condensation reaction on phosphoric acid and a mixture of urea and melamine, polymerizing and curing. The fire retardant has the advantages of sufficient sources of above raw materials, low price, and easy preparation, and is a compound which is a reactive fire retardant having the advantages of possessing of a certain anticorrosion performance, high performance efficiency, and low smoke and no corrosion gas generation during combustion.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to a high-efficiency nitrogen-phosphorus flame retardant and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the national economy and the continuous improvement of people's living standards, the society's demand for wood is increasing, and the fire accidents caused by this are on the rise every year, which has become a huge threat to the country and the people. Loss. At present, more and more attention is paid to the research and development of fire retardants at home and abroad. Traditional halogen-containing flame retardants will produce harmful gases when burned and pollute the environment, while reactive flame retardants have good stability. , is not easy to lose, and has the advantages of low toxicity, especially the preparation method of a high-efficiency nitrogen-phosphorus flame retardant that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/56B27K3/38
Inventor 刘方旭
Owner 刘方旭