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A kind of hybrid modified aluminum hypophosphite and preparation method thereof

A modified technology of aluminum hypophosphite, which is applied in the field of flame retardants, can solve the problems of poor thermal stability, low flame retardant efficiency, and high solubility in water of aluminum hypophosphite, and achieve good thermal stability, excellent flame retardant performance, and delayed The effect of decomposition

Active Publication Date: 2019-10-18
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of poor thermal stability, high solubility in water and low flame retardant efficiency of aluminum hypophosphite in the prior art, and provide a hypophosphorous acid with high thermal stability, low solubility in water and high flame retardant efficiency. Aluminum and its preparation method

Method used

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  • A kind of hybrid modified aluminum hypophosphite and preparation method thereof
  • A kind of hybrid modified aluminum hypophosphite and preparation method thereof
  • A kind of hybrid modified aluminum hypophosphite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of hybrid modified aluminum hypophosphite, the steps are as follows:

[0036] 1) Mix melamine, aluminum hypophosphite, graphite-like carbon nitride and water evenly and stir at 90°C for 0.5 hours;

[0037] 2) keep the temperature constant, add cyanuric acid to the system of step 1) and react for 0.5 hours;

[0038] 3) keep the temperature constant, add silicone resin to the system of step 2) and react for 0.5 hours;

[0039] 4) After cooling to room temperature, filter, dry and pulverize to obtain hybrid modified aluminum hypophosphite;

[0040] In parts by weight, the addition of each reactant is as follows:

[0041]

[0042]

[0043] The final hybrid modified aluminum hypophosphite is composed of aluminum hypophosphite and the coating layer on its surface. The coating layer has a three-layer structure, which is a melamine cyanurate layer and graphite-like nitride layers on both sides. Carbon layer and silicone resin layer; its temperatu...

Embodiment 2

[0050] The preparation method of hybrid modified aluminum hypophosphite, the steps are as follows:

[0051] 1) Mix cyanuric acid, aluminum hypophosphite, graphene and methanol evenly and stir for 4 hours at a temperature of 60° C.;

[0052] 2) keep the temperature constant, add melamine to the system of step 1) and react for 2 hours;

[0053] 3) keep the temperature constant, add silicone resin to the system of step 2) and react for 4 hours;

[0054] 4) After cooling to room temperature, filter, dry and pulverize to obtain hybrid modified aluminum hypophosphite;

[0055] In parts by weight, the addition of each reactant is as follows:

[0056]

[0057] The final hybrid modified aluminum hypophosphite is composed of aluminum hypophosphite and the coating layer on its surface. The coating layer has a three-layer structure, which is a melamine cyanurate layer and a graphene layer on both sides of it. Silicone resin layer; its temperature is 305°C when the thermal weight los...

Embodiment 3

[0059] The preparation method of hybrid modified aluminum hypophosphite, the steps are as follows:

[0060] 1) Mix melamine, aluminum hypophosphite, montmorillonite and ethanol evenly and stir for 2 hours at a temperature of 50° C.;

[0061] 2) keep the temperature constant, add cyanuric acid to the system of step 1) and react for 4 hours;

[0062] 3) keep the temperature constant, add silicon coupling agent KH550 to the system of step 2) and react for 0.5 hours;

[0063] 4) After cooling to room temperature, filter, dry and pulverize to obtain hybrid modified aluminum hypophosphite;

[0064] In parts by weight, the addition of each reactant is as follows:

[0065]

[0066] The final hybrid modified aluminum hypophosphite is composed of aluminum hypophosphite and the coating layer on its surface. The coating layer has a three-layer structure, namely a melamine cyanurate layer and a montmorillonite layer on both sides of it. and silicon coupling agent KH550 layer; its tem...

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Abstract

The invention relates to hybrid modified aluminum hypophosphite and a preparation method thereof. The hybrid modified aluminum hypophosphite is prepared by hybrid modification of aluminum hypophosphite with cyanuric acid, melamine, a two-dimensional layered material and an organic coating material; the organic coating material is a coupling agent and / or silicone resin. The finally prepared hybridmodified aluminum hypophosphite is mainly composed of aluminum hypophosphite and a coating layer on the surface; the coating layer is a multi-layer organic-inorganic hybrid structure. The temperatureof the hybrid modified aluminum hypophosphite is more than or equal to 300 DEG C when the thermal weight loss is 1 wt%, the temperature is more than or equal to 345 DEG C when the thermal weight lossis 5 wt%, and the carbon residue rate at the temperature of 750 DEG C is more than or equal to 50 wt%; the smoke density of a high molecular material during combustion after the hybrid modified aluminum hypophosphite is added is decreased by 20% or more. The preparation method has the advantages of simple process and low cost; the prepared product has the advantage of excellent flame retardant performance, good thermal stability, low water solubility, no agglomeration phenomenon during addition, and great application prospect.

Description

technical field [0001] The invention belongs to the field of flame retardants, and relates to a hybrid modified aluminum hypophosphite and a preparation method thereof. Background technique [0002] Aluminum hypophosphite (Aluminum hypophosphite, AHP) is a high-efficiency flame retardant with excellent performance, environmental friendliness, halogen-free and non-toxic. Flame retardant modification of various polymer materials. The flame retardant products prepared by using AHP have the characteristics of excellent performance and low heat release rate. If AHP is used to prepare and process thermoplastic polymers, the prepared products are not easy to volatilize and decompose under normal conditions. At the same time, AHP can also be used synergistically with other flame retardants to complement each other and effectively improve the flame retardant properties of materials. [0003] However, aluminum hypophosphite has obvious defects, such as poor thermal stability, easy o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/32
Inventor 彭治汉李换换秦铭骏翟一霖郭承鑫何小春彭治权
Owner DONGHUA UNIV