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A nano-zirconium phosphate-coated modified ammonium polyphosphate and an intumescent fireproof coating prepared therefrom

A technology of ammonium polyphosphate and zirconium phosphate package is applied in the field of flame retardant materials, which can solve the problems of poor compatibility, easy migration, easy hydrolysis, etc., and achieves improved thermal stability and barrier performance, simple preparation method, and flame retardant effect. excellent effect

Active Publication Date: 2021-07-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a nano zirconium phosphate for the problems that ammonium polyphosphate is easy to migrate and hydrolyze in a humid environment, has poor compatibility with the substrate, and the intumescent carbon layer in the intumescent fireproof coating is loose and low in strength. Coated modified ammonium polyphosphate flame retardant, by coating zirconium phosphate nanosheets on polyethyleneimine modified ammonium polyphosphate, exerts P-O-C-N flame retardant synergistic effect, and exerts flame retardant effect in both gas phase and solid phase ; Applying the obtained flame retardant to the preparation of intumescent fireproof coatings has the advantages of low cost, good halogen-free char formation, environmental protection and wide applicability, and the preparation method involved is simple in process and mild in reaction conditions, and is suitable for popularization and application

Method used

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  • A nano-zirconium phosphate-coated modified ammonium polyphosphate and an intumescent fireproof coating prepared therefrom
  • A nano-zirconium phosphate-coated modified ammonium polyphosphate and an intumescent fireproof coating prepared therefrom

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Effect test

Embodiment 1

[0042] A kind of nano zirconium phosphate coated modified ammonium polyphosphate, its preparation method comprises the steps:

[0043] 1) TBA exfoliation of zirconium phosphate: In a 500ml four-neck flask, 0.01mol zirconium phosphate and 300ml deionized water were fully dispersed by mechanical stirring and ultrasonication. Tetrabutylammonium hydroxide solution (TBA concentration is 0.1mol / L), dropwise in the four-necked flask within 30min at a constant speed, continue to react for 2h after dropping, then add 20ml of 4mol / L concentrated phosphoric acid dropwise at a constant speed within 30min In the flask, after the reaction (2h), the resulting mixed solution was centrifuged for solid-liquid separation to obtain a translucent gel precipitate and washed with distilled water;

[0044] 2) PEI-coated APP: Disperse 3 g of ammonium polyphosphate in deionized water by mechanical stirring and ultrasonic action to form a suspension, then add 6 g of polyethyleneimine PEI to the resultin...

Embodiment 2

[0047] A kind of nano zirconium phosphate coated modified ammonium polyphosphate, its preparation method comprises the steps:

[0048] 1) TBA exfoliation of zirconium phosphate: In a 500ml four-neck flask, 0.01mol zirconium phosphate and 300ml deionized water were fully dispersed by mechanical stirring and ultrasonication. Tetrabutylammonium hydroxide solution (TBA concentration is 0.1mol / L), dropwise in the four-necked flask within 30min at a constant speed, continue to react for 2h after dropping, then add 20ml of 4mol / L concentrated phosphoric acid dropwise at a constant speed within 30min In the flask, after the reaction (2h), the resulting mixed solution was centrifuged for solid-liquid separation to obtain a translucent gel precipitate and washed with distilled water;

[0049] 2) PEI-coated APP: Disperse 2g of ammonium polyphosphate in deionized water by mechanical stirring and ultrasonic action to form a suspension, then add 4g of polyethyleneimine PEI to the resulting ...

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Abstract

The invention discloses a nanometer zirconium phosphate-coated modified ammonium polyphosphate flame retardant. By coating zirconium phosphate nanosheets on polyethyleneimine PEI modified ammonium polyphosphate, the P‑O‑C‑N flame retardant can be exerted. Combustion synergistic effect, and play a flame-retardant effect in both the gas phase and the solid phase; it is applied to the preparation of intumescent fire-resistant coatings, which have the advantages of high carbon layer strength, dense intumescent carbon layer, high-efficiency flame retardant and smoke suppression, and can be effectively Solve the problems that ammonium polyphosphate is easy to migrate and hydrolyze in humid environment, and improve the weather resistance and durability of the coating; the obtained intumescent fireproof coating integrates flame retardant, smoke suppression and enhancement functions, excellent halogen-free char formation, environmental protection and applicability The method is extensive, and the involved preparation method has simple process and mild reaction conditions, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a nanometer zirconium phosphate-coated modified ammonium polyphosphate and an intumescent fireproof coating prepared by using the same. Background technique [0002] Intumescent fireproof coating is prepared by adding polymer water-based emulsion, polymer resin, etc. as a matrix, adding intumescent fireproof system composed of acid source, gas source and carbon source, as well as fillers and additives. These components react at high temperature, dehydrate and carbonize, and form a uniform and dense honeycomb-shaped expanded carbon layer, which isolates air and heat transfer, thereby achieving excellent fire and heat insulation effects. [0003] Ammonium polyphosphate is a new type of high-efficiency non-halogen intumescent flame retardant, its phosphorus content is as high as 30-32%, and its nitrogen content is 14-16%. The most prominent feature of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/06C09C3/10C09D5/18C09D151/00B82Y30/00
CPCB82Y30/00C01P2006/37C08K2003/323C09C1/00C09C3/006C09C3/063C09C3/10C09D5/185C09D151/003C08K9/10C08K3/32C08K5/053C08K5/34922
Inventor 刘治田王成霍思奇张旗
Owner WUHAN INSTITUTE OF TECHNOLOGY
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