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An organic-inorganic hybrid magnesium hexamethylene phosphonate flame retardant and its preparation method

A technology of magnesium hexamethylene phosphonate and melamine hexamethylene phosphonic acid, which is applied in the field of flame retardants, can solve the problems of easy volatilization, low decomposition temperature, and large smoke generation, and achieve good smoke suppression effect, good compatibility, low cost effect

Inactive Publication Date: 2018-07-17
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But inorganic flame retardants also have many shortcomings: inorganic flame retardants are added in large amounts (generally more than 50%) in polymer materials, which can easily lead to a decline in the processing performance and physical properties of materials; the decomposition temperature is low, so they can only Suitable for polymers with lower processing temperatures
Compared with organic flame retardants, inorganic flame retardants have the advantages of high stability, long-lasting flame retardant effect, good smoke suppression, low smoke toxicity and low cost, but at the same time, they have the disadvantages of large filling amount and high molecular weight. Disadvantages of poor compatibility; organic flame retardants have the advantages of good flame retardant effect, less addition amount and good compatibility with polymer materials, but they also have the disadvantages of being volatile, large smoke generation and high toxicity

Method used

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  • An organic-inorganic hybrid magnesium hexamethylene phosphonate flame retardant and its preparation method
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  • An organic-inorganic hybrid magnesium hexamethylene phosphonate flame retardant and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0025] Add 1 L of deionized water as a solvent into a reaction vessel equipped with a stirring device, a thermometer and a reflux condensing device, and then add 0.69 kg (1 mol) of melamine hexamethylene phosphonic acid, stir and slowly raise the temperature to 50°C. Slowly add 0.12 kg (2 mol) of magnesium hydroxide into the reactor in batches, and keep the reaction for 8 hours. After the solution was cooled, absolute ethanol was added and stirred for 4 h, then left to stand overnight and then suction filtered. Washing with 5wt% hydrochloric acid aqueous solution for 2-3 times, then washing with absolute ethanol for 3-4 times, and finally vacuum-drying to obtain 0.44 kg of white solid, namely the organic-inorganic hybrid magnesium hexamethylene phosphonate flame retardant.

Embodiment 2

[0027] Add 2.5L of deionized water as a solvent into a reaction vessel equipped with a stirring device, a thermometer and a reflux condensing device, then add 1.38 kg (2 mol) of melamine hexamethylene phosphonic acid, stir and slowly raise the temperature to 55°C. Slowly add 0.35 kg (6 mol) of magnesium hydroxide in batches into the reactor, and keep it warm for 10 hours. After the solution was cooled, absolute ethanol was added and stirred for 5 h, then left to stand overnight and then suction filtered. Wash with 7wt% hydrochloric acid aqueous solution for 2-3 times, then wash with absolute ethanol for 3-4 times, and finally vacuum-dry to obtain 1.47 kg of white solid of hexamethylene phosphonate magnesium flame retardant.

[0028] We have carried out infrared spectroscopic analysis to the white solid that embodiment 2 makes, and the result is as follows figure 2 shown. from figure 2 It can be seen in 3217.29cm -1 It is the stretching vibration absorption peak of -OH, 2...

Embodiment 3

[0030] Add 3L of deionized water as a solvent into a reaction vessel equipped with a stirring device, a thermometer and a reflux condensing device, then add 2.07 kg (3 mol) of melamine hexamethylene phosphonic acid, stir and slowly raise the temperature to 60°C. Slowly add 0.7kg (12mol) of magnesium hydroxide into the reactor in batches, and keep the temperature for 12 hours. After the solution was cooled, absolute ethanol was added and stirred for 6 h, then left to stand overnight and then suction filtered. Washing with 8 wt% hydrochloric acid aqueous solution for 2-3 times, then washing with absolute ethanol for 3-4 times, and finally vacuum-drying to obtain 2.06 kg of white solid of hexamethylene phosphonate magnesium flame retardant.

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Abstract

The invention provides an organic-inorganic hybrid magnesium hexamethylene phosphate flame retardant and a preparation method thereof. The novel flame retardant is prepared as follows: melamine hexamethylene phosphonic acid and magnesium hydrate in a molar ratio of 1:(2-6) are subjected to reaction at 50-60 DEG C for 8-16 h under the condition of taking deionized water as solvent, and cooling, precipitation by absolute ethyl alcohol, allowing standing still, suction filtration, washing, vacuum drying and other processes are performed. The flame retardant has the advantages of good chemical stability, small amount of addition, good smoke suppression effect, environmental protection, excellent flame retardant effect, good material compatibility, no influence on material machining properties, and the like; the flame retardant has good flame retardant effect in aspects of plastic and fiber, and is a very promising novel organic-inorganic hybrid flame retardant.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and in particular relates to an organic-inorganic hybrid magnesium hexamethylene phosphonate flame retardant and a preparation method thereof. Background technique [0002] The so-called flame retardant is an additive that can improve the flame retardancy, self-extinguishing property or smoke suppression of flammable or combustible materials. It is one of the main additives for important fine chemical products and synthetic materials. There are many kinds of flame retardants, which can be classified into two categories according to their chemical composition: organic flame retardants and inorganic flame retardants. [0003] There are many kinds of organic flame retardants, and the widely used ones include organohalogen, organophosphorus, and organophosphorus-nitrogen flame retardants. Organic halogen-based flame retardants are an important series of organic flame retardants, and they ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/5357C08L23/12C07F9/6521
CPCC07F9/6521C08K5/5357C08L2201/02C08L23/12
Inventor 黄齐茂王祎虹肖兴强王慧东石俊龙
Owner WUHAN INSTITUTE OF TECHNOLOGY
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