Carbon microsphere, hydrotalcite and polyphosphazene hybrid flame retardant and preparation method thereof

Abstract

The invention discloses a carbon microsphere-hydrotalcite-polyphosphazene hybrid flame retardant and a preparation method thereof.The preparation method comprises the steps that the surface of a carbon microsphere is coated with hydrotalcite through electrostatic acting force, then the surface of the carbon microsphere-hydrotalcite is coated with a polyphosphazene organic film formed after in-situ polymerization reaction of phosphazene and 4, 4 '-diaminodiphenyl ether, and the flame retardant is prepared. The carbon microsphere, hydrotalcite and polyphosphazene hybrid flame retardant is obtained. According to the carbon microsphere, hydrotalcite and polyphosphazene hybrid flame retardant disclosed by the invention, the multi-interface problem between various particles and a polyolefin matrix is converted into a single interface problem, so that the deterioration of the flame retardant on the mechanical property of the polyolefin matrix is reduced to the maximum extent, and through the cooperation of the carbon microspheres, the hydrotalcite and the polyphosphazene, the mechanical property of the polyolefin matrix is improved. The flame retardant property of the polyolefin matrix material is obviously improved, meanwhile, the damage of the flame retardant to the mechanical property of the matrix material can be reduced, and the flame-retardant polyolefin composite material with excellent comprehensive performance is obtained.

Description

technical field [0001] The invention relates to a carbon microsphere@hydrotalcite@polyphosphazene hybrid flame retardant with carbon microspheres as the core and hydrotalcite and polyphosphazene as the double shell and its preparation method, which belongs to the flame retardant technology of polyolefin matrix materials field. Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic that has been widely used in industries such as automobiles, home appliances, and construction due to its advantages such as good processability, excellent chemical resistance, and relatively low price. However, PP is a flammable material, and its limiting oxygen index is generally 17.4% to 18.5% (<21%). It burns fast in case of fire, has a high calorific value, and produces a large number of combustible molten droplets, which in turn cause many fire accidents. The country's economic construction and people's lives and properties have caused huge losses, which has ...

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Problems solved by technology

Currently known flame retardants with smoke suppression effects are mostly magnesium hydroxide, aluminum hydroxide, hydrotalcite, etc. However, when these flame retardants are added to polyolefins, the mixture of carbon microspheres and smoke suppression flame The self-agglomeration is serious, and the carbon microspheres and the smoke-suppressing flame retardant are both inorganic compounds, and the two are in direct contact with the polypropylene matrix, which increases the problems of low flame retardant efficiency and poor mechanical properties caused by agglomeration and interface problems

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