Flame-retardant polymer composite material and preparation method thereof

Abstract

The flame-retardant polymer composite material is prepared from the following raw materials in parts by weight: 100 to 120 parts of epoxy resin, 20 to 40 parts of flame retardant, 3 to 6 parts of metal oxide, 4 to 6 parts of montmorillonite and 10 to 20 parts of curing agent, the preparation method of the flame-retardant polymer composite material comprises the following steps: 1, heating the epoxy resin to 85-90 DEG C, then adding the flame retardant, continuously stirring for 15-30 minutes, adding the metal oxide and the montmorillonite, and uniformly stirring to obtain a first mixture; and 2, adding a curing agent into the first mixture, stirring until no bubbles exist, pouring the mixture into a mold while the mixture is hot, curing at 120-130 DEG C for 2 hours, heating to 140 DEG C, curing for 1 hour, and demolding while the mixture is hot to obtain the flame-retardant polymer composite material. And the flame-retardant layer formed during combustion can prevent combustion products from escaping and inhibit thermal decomposition of materials below the flame-retardant layer, so that the flame-retardant, low-smoke and low-toxicity effects are achieved.

Description

technical field [0001] The invention belongs to the field of flame retardant technology, and in particular relates to a flame retardant polymer composite material and a preparation method thereof. Background technique [0002] Flame retardant modification technology is the key technology and main way to improve the fire safety characteristics of epoxy, phenolic and other polymers and their composite materials. It plays an irreplaceable important role and has made great contributions to the safe development and low-carbon development of human society. However, although the flame retardant modification method based on traditional bromine-antimony flame retardants has the characteristics of high efficiency and low cost, and can significantly improve the flame retardant properties of epoxy, phenolic and other polymers and their composite materials, such flame retardants During the combustion process, a large amount of toxic and harmful smoke such as HBr will be released, which ...

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Problems solved by technology

However, although the flame retardant modification method based on traditional bromine-antimony flame retardants has the characteristics of high efficiency and low cost, and can significantly improve the flame retardant properties of epoxy, phenolic and other polymers and their composite materials, such flame retardants During the combustion process, a large amount of toxic and harmful smoke such as HBr will be released, which seriously endangers human health. Studies have shown that the most direct cause of most fire casualties is toxic and harmful smoke

[0003] Since most polymer matrix materials are non-polar materials, the water solubility of the flame retardant component will cause the flame retardant component to migrate and precipitate to the surface, which affects the appearance on the one hand, and leads to uneven distribution of the flame retardant component in the material on the other hand. The flame retardant effect gradually decreases, affecting the durable flame retardant performance of the material; polyols or low molecular weight polyols also have low thermal decomposition temperatures, so they are not suitable for use in substrates with higher processing temperatures

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