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P-N-C type intumescent flame retardant and preparation method and application thereof in fireproof coating

An intumescent flame retardant, P-N-C technology, used in fire-resistant coatings, coatings, organic chemistry, etc., can solve the problem of coating fire resistance attenuation and other problems, achieve simple construction, improve fire resistance, and ensure the effect of foaming performance.

Inactive Publication Date: 2021-02-12
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if one or two materials in the P-N-C type intumescent flame retardant are modified, the unmodified components will still cause the fire resistance of the coating to decay after the water resistance test.

Method used

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  • P-N-C type intumescent flame retardant and preparation method and application thereof in fireproof coating
  • P-N-C type intumescent flame retardant and preparation method and application thereof in fireproof coating
  • P-N-C type intumescent flame retardant and preparation method and application thereof in fireproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Synthesis of P-N-C intumescent flame retardant:

[0044] Step 1: Dissolve 24.2g tris and 8g sodium hydroxide in 200mL deionized water completely under stirring, add the mixed solution to 36.9g cyanuric chloride in 400mL acetone, and react in ice bath for 2 hours .

[0045] Step 2: Add 42.4g of sodium carbonate and 40.30g of p-hydroxybenzaldehyde to the system, react at 65°C for 8h, then filter the product with suction, wash with water and dry.

[0046] Step 3: Add 40.8g of the product of the second step and 17.3g of diethylenetriamine into 150mL of ethanol, stir vigorously and reflux for 4h, evaporate the ethanol, wash with alcohol three times, and dry to obtain the product.

[0047] Step 4: Stir the mixed solution of ethanol: water (volume ratio 800:30) under a nitrogen atmosphere for 1 hour, then add 50 g of the product of the third step and 100 g of APP under stirring, and react at room temperature for 0.5 hours. After reacting for 4 hours, no ammonia gas was de...

Embodiment 2

[0052] 1. Synthesis of P-N-C intumescent flame retardant:

[0053] Step 1: Dissolve 24.2g tris and 8g sodium hydroxide in 200mL deionized water completely under stirring, add the mixed solution to 36.9g cyanuric chloride in 400mL acetone, and react in ice bath for 2 hours .

[0054] Step 2: Add 42.4g of sodium carbonate and 40.30g of p-hydroxybenzaldehyde to the system, react at 65°C for 8h, then filter the product with suction, wash with water and dry.

[0055] Step 3: Add 40.8g of the product of the second step and 20.4g of ethylenediamine into 150mL of ethanol, stir vigorously and reflux for 4h, evaporate the ethanol, wash with alcohol three times, and dry to obtain the product.

[0056] Step 4: Stir the mixed solution of ethanol: water (volume ratio 800:30) under a nitrogen atmosphere for 1 hour, then add 50 g of the product of the third step and 100 g of APP under stirring, and react at room temperature for 0.5 hours. After reacting for 4 hours, no ammonia gas was detec...

Embodiment 3

[0061] 1. Synthesis of P-N-C intumescent flame retardant:

[0062] Step 1: Dissolve 24.2g tris and 8g sodium hydroxide in 200mL deionized water completely under stirring, add the mixed solution to 36.9g cyanuric chloride in 400mL acetone, and react in ice bath for 2 hours .

[0063] Step 2: Add 42.4g of sodium carbonate and 40.30g of p-hydroxybenzaldehyde to the system, react at 65°C for 8h, then filter the product with suction, wash with water and dry.

[0064] The third step: add 40.8g of the product of the second step and 20g of triethylenetetramine into 150mL of ethanol, vigorously stir and reflux for 4h, evaporate the ethanol, wash with alcohol three times, and dry to obtain the product.

[0065] Step 4: Stir the mixed solution of ethanol: water (volume ratio 800:30) under a nitrogen atmosphere for 1 hour, then add 60 g of the product of the third step and 100 g of APP under stirring, react at room temperature for 0.5 hours, and then reflux After reacting for 4 hours, n...

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Abstract

The invention belongs to the technical field of coatings, and discloses a P-N-C type intumescent flame retardant, a preparation method thereof and application of the P-N-C type intumescent flame retardant in a fireproof coating. The preparation method of the intumescent flame retardant comprises the following steps: (1) dissolving trihydroxymethyl aminomethane and sodium hydroxide in deionized water, adding the obtained mixed solution into an acetone solution of cyanuric chloride, and carrying out ice bath reaction; (2) adding sodium carbonate and p-hydroxybenzaldehyde for reaction, and performing suction filtration, water washing and drying; (3) adding a polyamine compound and a product obtained in the step (2) into ethanol, stirring and refluxing, evaporating the ethanol, washing with alcohol for three times, and drying to obtain a product; and (4) stirring the mixed solution of ethanol and water in a nitrogen atmosphere, adding APP and the product obtained in the step (3), refluxing, detecting that no ammonia gas is discharged, filtering, washing with ethanol, washing with water and drying. According to the method, three components of the P-N-C type intumescent flame retardant are modified, the water resistance of the P-N-C type intumescent flame retardant is improved in a chemical bonding mode, and the water resistance of a fireproof coating can be improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a P-N-C type intumescent flame retardant, a preparation method thereof and an application in fireproof coatings. Background technique [0002] Among the many fire protection measures for steel structures, the most economical and effective is to coat the steel surface with fire retardant coatings. Fire retardant coatings can increase the fire resistance limit of steel structures to the requirements stipulated in fire protection design codes. Among fire retardant coatings, ultra-thin fire retardant coatings for steel structures are widely used due to their good finish, good flame retardancy, and simple construction. The ultra-thin steel structure fire retardant coating forms a uniform porous spongy carbonization layer under the high temperature of the flame, which can not only cut off the direct contact between the external heat source and the substrate, but also absorb part of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/22C09K21/12C09D133/04C09D5/18C09D7/61
CPCC07D251/22C08K2003/2241C08K2003/2296C08K2003/323C09D5/185C09D133/04C09K21/12C09D7/61C08K13/02C08K3/32C08K5/3492C08K3/22C08K7/24
Inventor 王岩
Owner BEIHUA UNIV