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

A composite material and in-situ synthesis technology, which is applied in the field of organic compound + inorganic synthesis of flame-retardant transparent materials, can solve the problems of inability to realize the amount of magnesium hydroxide, complexity, and inability to realize nanoscale dispersion of flame retardant magnesium hydroxide

Inactive Publication Date: 2009-12-09
TAIYUAN UNIV OF TECH
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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 retarda

Method used

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

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[0113] The present invention will be further described below in conjunction with the accompanying drawings:

[0114] figure 1 As shown, it is a one-step in-situ synthesis to prepare an organic flame-retardant transparent material. It is synthesized in one-step in-situ in a four-necked flask. Each step must be strictly controlled and the data must be accurate.

[0115] The chemical substances used in the synthesis are determined according to the preset numerical range, in grams, milliliters, centimeters 3 It is the unit of measurement.

[0116] The various utensils used in the synthesis must be cleaned first, and no impurities should enter to prevent the production of unknown by-products.

[0117] figure 2 Shown is the state diagram of the three-phase material polymerization reaction composite process. The figure shows that the octadecyltrimethylammonium ion enters between the sodium-based montmorillonite sheets through ion exchange, and the long hydrocarbon chain increases The...

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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...

Claims

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Application Information

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IPC IPC(8): C08F120/14C08F2/44C08K3/22C08K3/34
Inventor 晏泓张猛魏丽乔戴晋明刘旭光贾虎生许并社
Owner TAIYUAN UNIV OF TECH
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