One-step in situ synthesis method for preparing transparent organic inflaming retarding composite material

Abstract

The invention relates to a one-step in situ synthesis method for preparing transparent organic flaming retarding composite material. Methyl methacrylate is taken as raw material, Na-montmorillonite and magnesium hydroxide are taken as fire retardant, firstly the Na-montmorillonite is purified, magnesium hydroxide microemulsion is prefabricated, methyl methacrylate monomer is added into a four-opening flask, and initiating agent azodiisobutyronitrile absolute alcohol solution is dripped in under the conditions of protection of nitrogen, water circulation condensation, continuous heating at constant temperature and uniform stirring, thus methyl methacrylate + magnesium hydroxide + Na-montmorillonite three phase composite material, namely the organic flaming retarding nano composite material, is synthesized by one step. The material is in white unconsolidated composite particle power, the average particle size of magnesium hydroxide in base after film forming is 60nm, the Na-montmorillonite is stripped, luminousness of product is 85%, absorption rate of ultraviolet light is 40%, limited oxygen index is improved from 19% to 26%, and hardness can be improved by 10%. The method uses less devices, process flow is short, no environmental pollution is produced, and yield is high.

Description

technical field [0001] The invention relates to a polymethyl methacrylate organic flame-retardant transparent composite material prepared by a one-step in-situ synthesis method, and belongs to the technical field of a method for synthesizing flame-retardant transparent materials with organic compounds and inorganic substances and its application. Background technique [0002] Polymethyl methacrylate, referred to as PMMA, is a high-grade transparent material with a light transmittance of 92%, a UV transmittance of 73%, good weather resistance, and easy coloring. It is mainly used in transparent accessories for aviation, automobiles, ships, and instruments, such as Windshields of vehicles, airplanes, and ships, windows of buildings, electrical insulation parts, etc. [0003] Since polymethyl methacrylate has an aliphatic carbon chain structure and is extremely flammable, it must be treated with flame retardant before it can be used in high-grade products. Phosphorous flame ret...

AI Technical Summary

Problems solved by technology

[0005] To prepare polymethyl methacrylate flame-retardant transparent materials, the conventional method is to prepare first, then modify, and then add the process route, which is not only complicated, but also unable to realize the nano-scale dispersion of the flame retardant magnesium hydroxide in the polymer. As a result, it is impossible to achieve the purpose of reducing the amount of magnesium hydroxide and improving the flame retardant performance through nanometerization, and there are many disadvantages and deficiencies in the process.

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