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Preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder, preparation method of flame-retardant powder and fireproof coating

A technology of ammonium polyphosphate and high degree of polymerization, which is applied in the direction of fireproof coatings, chemical instruments and methods, coatings, etc., and can solve the problems of unsatisfactory fireproof performance of fireproof coatings, low polymerization degree of ammonium polyphosphate, hidden safety hazards in production, etc. problems, to achieve the effects of excellent fire resistance, low energy consumption in the preparation process, and excellent fire resistance and flame retardant properties

Active Publication Date: 2022-03-18
HUABAO (TIANJIN) NEW MATERIAL SCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, melamine, ammonium polyphosphate and pentaerythritol three-system fireproof coatings are relatively mature technologies, but there are still problems of low polymerization degree and easy decomposition of the prepared ammonium polyphosphate, which leads to the poor fireproof performance of the prepared fireproof coatings. satisfactory
[0003] At the same time, the preparation of high-polymerization-degree ammonium polyphosphate (APP) in the prior art generally requires high-temperature and high-pressure conditions, or the use of flammable and explosive catalysts for catalysis, which not only causes excessive energy loss and increases the cost, but also It poses a huge safety hazard to manufacturing

Method used

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  • Preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder, preparation method of flame-retardant powder and fireproof coating
  • Preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder, preparation method of flame-retardant powder and fireproof coating
  • Preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder, preparation method of flame-retardant powder and fireproof coating

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preparation example Construction

[0040] According to a first aspect of the present invention, a kind of preparation method of high degree of polymerization ammonium polyphosphate is provided, comprising the following steps:

[0041] Using magnesium sulfate to catalyze the polymerization of ammonium polyphosphate with a low degree of polymerization to obtain ammonium polyphosphate with a high degree of polymerization;

[0042] Among them, the degree of polymerization of ammonium polyphosphate with a low degree of polymerization is below 20, preferably 5 to 20, and its typical but non-limiting degree of polymerization is, for example, 5, 8, 10, 12, 15, 18, 20; The degree of polymerization of ammonium polyphosphate is above 1000, and its typical but non-limiting degree of polymerization is, for example, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000.

[0043] In the present invention, the non-flammable and explosive catalyst magnesium sulfate is used to replace the flammable and explosive organic catalyst ...

Embodiment 1

[0080] A preparation method of flame retardant powder, comprising the following steps:

[0081] 1. Put 30 parts of urea into 100 parts of water to dissolve completely, then slowly add 115 parts of concentrated phosphoric acid with a concentration of 85% under stirring, use the hydrolysis of concentrated phosphoric acid to release heat, and raise the temperature of the reaction system to 90°C. Continue to insulate and stir for 2 hours at no more than 500RPM, the reaction is completed, the reaction system is cooled to normal temperature, and the material-water mixture A is obtained;

[0082] 2. In the stirring state, add melamine to the material water mixture A, mix and stir evenly, and keep stirring for 1 hour at a stirring speed not greater than 500RPM to obtain the water mixture B, which contains ammonium polyphosphate with a low degree of polymerization, and the degree of polymerization is 5 ~20;

[0083] 3. Take 100 parts of silica sol with a concentration of 28%, and then...

Embodiment 2

[0089] A preparation method of flame retardant powder, comprising the following steps:

[0090] 1. Put 30 parts of urea into 100 parts of water to dissolve completely, then slowly add 115 parts of concentrated phosphoric acid with a concentration of 85% under stirring, use the hydrolysis of concentrated phosphoric acid to release heat, and raise the temperature of the reaction system to 90°C. Continue to insulate and stir for 2 hours at no more than 500RPM, the reaction is completed, the reaction system is cooled to normal temperature, and the material-water mixture A is obtained;

[0091] 2. In the stirring state, add tripolyphosphate ester to the material water mixture A, mix and stir evenly, and continue stirring for 1 hour at a stirring speed not greater than 500RPM to obtain water mixture B, which contains ammonium polyphosphate with a low degree of polymerization, polymerized The degree is 10~18;

[0092] 3. Take 10 parts of silica sol with a concentration of 32%, and t...

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Abstract

The invention provides a preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder, a preparation method of flame-retardant powder and a fireproof coating, and relates to the technical field of fireproof coatings. The preparation method of the high-polymerization-degree ammonium polyphosphate comprises the following steps: catalyzing low-polymerization-degree ammonium polyphosphate to polymerize by magnesium sulfate to obtain the high-polymerization-degree ammonium polyphosphate; wherein the polymerization degree of the low-polymerization-degree ammonium polyphosphate ranges from 5 to 20, and the polymerization degree of the high-polymerization-degree ammonium polyphosphate is 1000 or above. The technical problems that ammonium polyphosphate prepared in the prior art is low in polymerization degree and easy to decompose, and the preparation process is high in energy consumption and large in potential safety hazard are solved, and the technical effects that high-polymerization-degree ammonium polyphosphate is prepared at normal temperature and normal pressure, and the preparation process is low in energy consumption, safe and efficient are achieved. Meanwhile, the high-polymerization-degree ammonium polyphosphate is high in polymerization degree and not easy to decompose, so that the fireproof coating prepared from the high-polymerization-degree ammonium polyphosphate can exert excellent fire resistance and flame retardance.

Description

technical field [0001] The invention relates to the technical field of fireproof coatings, in particular to a preparation method of high-polymerization-degree ammonium polyphosphate, high-polymerization-degree ammonium polyphosphate, flame-retardant powder and its preparation method, and fireproof paint. Background technique [0002] At present, melamine, ammonium polyphosphate and pentaerythritol three-system fireproof coatings are relatively mature technologies, but there are still problems of low polymerization degree and easy decomposition of the prepared ammonium polyphosphate, which leads to the poor fireproof performance of the prepared fireproof coatings. Satisfactory. [0003] At the same time, the preparation of high-polymerization-degree ammonium polyphosphate (APP) in the prior art generally requires high-temperature and high-pressure conditions, or the use of flammable and explosive catalysts for catalysis, which not only causes excessive energy loss and increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/40C09K21/04C09D5/18C09D183/04
CPCC01B25/405C09K21/04C09D5/18C09D183/04C08K2003/323C08K9/10C08K3/32
Inventor 孙晔张鼎昊陈建伟王建龙刘鹏吴娜白凤祥杨帆韩连山张景洁
Owner HUABAO (TIANJIN) NEW MATERIAL SCI & TECH DEV CO LTD