Supramolecular assembly modified ammonium polyphosphate and preparation method thereof

An ammonium polyphosphate and supramolecular technology, applied in the field of flame retardant materials, can solve the problems of unsuitability for large-scale industrial production, high cost of silane coupling agent, easy loss of coating effect, etc., to improve quality and improve compatibility. , the effect of slowing down the combustion process

Active Publication Date: 2021-02-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Han Shenjie et al. are studying microencapsulated ammonium polyphosphate, indicating that although microencapsulation can enhance the thermal stability of APP and the compatibility with the matrix, the microencapsulated shell composed of rigid chains is easy to break and is easily lost under mechanical action. wrapping effect
Yuan Caideng's team used silica and silane coupling agents to modify the surface of APP. Although the mechanical properties and flame retardancy have been significantly improved, the cost of silane coupling agents is high and it is not suitable for large-scale industrial production.

Method used

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  • Supramolecular assembly modified ammonium polyphosphate and preparation method thereof
  • Supramolecular assembly modified ammonium polyphosphate and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0019] The preparation method of supramolecular assembly modified ammonium polyphosphate of the present invention:

[0020] Add 35-40% formaldehyde solution into the melamine and mix thoroughly to adjust the pH value of the mixture to 8-9. Under the condition of 80-90 ℃ oil bath, mechanically stir for 20-30 minutes to fully react to form a transparent prepolymer prepolymer. Add the prepolymer to the ammonium polyphosphate aqueous solution, and adjust the pH value of the mixed solution to 4-5. Heat the mixed solution in an oil bath at 80-90 °C, add organic acid to it, and stir mechanically for 1-2 h. The ammonium polyphosphate powder modified by supramolecular assembly can be obtained after the product is filtered and washed 5 to 6 times, dried, and ground.

example 1

[0022] 25 g of commercially available APP and 75 g of polypropylene were melt-blended to prepare a standard experimental test sample of polypropylene composite material, denoted as PP1.

example 2

[0024] 20 g of commercially available APP, 5 g of commercially available charcoal agent and 75 g of polypropylene were melt-blended to prepare a standard experimental test sample of polypropylene composite material, which was denoted as PP2.

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Abstract

The invention relates to a supramolecular assembly modified ammonium polyphosphate and a preparation method thereof. Surface modification of ammonium polyphosphate (APP) by supramolecular assembly, the prepared supramolecular assembly modified ammonium polyphosphate has a lamellar structure in the microcosm, and the compatibility of the modified powder with the polymer matrix There is a significant improvement. Applying modified ammonium polyphosphate to polymers can significantly improve the flame retardancy of polymer composites.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, and relates to supramolecular assembly modified ammonium polyphosphate and a preparation method thereof. Background technique [0002] Polymers, as materials widely used today, play an increasingly important role in our daily life. However, polymer materials are easy to burn, which poses a threat to people's lives and properties. With the improvement of people's awareness of safety and environmental protection, halogen-free flame retardants, especially intumescent flame retardants, have become a research hotspot due to their advantages of low smoke, non-toxic, anti-drip, and environmental protection. APP (Ammonium Polyphosphate) is an important part of intumescent flame retardants and has high content of P and N flame retardant elements, but it has strong hygroscopicity, poor compatibility with polymer matrix and low flame retardant efficiency. Wang Zhengzhou's team used APP a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/32C08L23/12
CPCC08K3/32C08K9/10C08K2003/323C08L23/12
Inventor 袁必和尚升孙亚如陈先锋陈公轻齐聪睿董浩然
Owner WUHAN UNIV OF TECH
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