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Preparation method of fire retardant

A technology of flame retardants and flasks, applied in the direction of silicon organic compounds, etc., can solve problems such as difficulty in finding substitutes, and achieve the effects of cost saving, wide application space, and simple preparation process

Inactive Publication Date: 2015-05-27
邱小林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Halogenated flame retardants are early and mature flame retardants, but halogenated flame retardants will release harmful gases when materials are burned. With the enhancement of people's awareness of environmental protection, the development of halogenated flame retardants has been restricted. However, in some areas where halogenated flame retardants are used, it is difficult to find suitable substitutes in the near future

Method used

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Experimental program
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Embodiment Construction

[0015] A preparation method of flame retardant, comprising the steps of:

[0016] (1) In a flask equipped with a stirrer, a thermometer, a high-efficiency reflux condenser and a drying tube at the top of the condenser, replace the air in the bottle with nitrogen, and add 0.7mol of dioxane and 0.1mol of tetrachloride Silicon;

[0017] (2) Under stirring, cool with a cold water bath to lower the temperature of the reaction system below 25°C, add 0.1 mol of 1,3-dichloro-2-propanol dropwise, control the reaction temperature not higher than 35°C, and raise the temperature after dropping To 45°C, heat preservation reaction for 2h;

[0018] (3) After the HCl gas is released, drop 0.05 mol of ethylene glycol into the four-necked flask, control the reaction temperature not higher than 55°C, raise the temperature to 70°C after dropping, and react for 5 hours;

[0019] (4) After the HCl gas is released, add 0.22mol 1,3-dichloro-2-propanol dropwise, control the reaction temperature not ...

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Abstract

The invention provides a preparation method of a fire retardant and belongs to the field of material preparation. The preparation method comprises the following steps: adding dioxane and silicon tetrachloride to a flask; while stirring, cooling in cold water bath, dropwise adding 3-dichloro-2-propyl alcohol, dropwise adding ethyl glycol to a four-neck flask after the HCl gas is completely released, dropwise adding the 3-dichloro-2-propyl alcohol after the HCl gas is completely released, next, adding melamine after the HCl gas is completely released, preserving heat and stirring for 1 hour, and taking the pH value of the solution being within the range of 5-6 as the reaction endpoint; performing cooling and suction filtration on the reaction system, removing the dioxane and low-boiling point matters in the filtrate by virtue of reduced pressure distillation, adding petroleum ether and stirring and washing, and removing the petroleum ether by virtue of reduced pressure distillation, thereby obtaining the product EDSD. Due to effective improvement of the traditional preparation process, the byproduct silicon tetrachloride of polycrystalline silicon is utilized as the synthesis raw material of the fire retardant and the prepared fire retardant is higher in inflaming retarding efficiency; besides, the preparation process is simple and the cost is saved; the preparation method of the fire retardant has wide application space.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of a flame retardant. Background technique [0002] With the rapid development of science and technology, organic synthetic polymer materials are widely used, but their [0003] Most of them are flammable. According to statistics, most of the fires that have occurred over the years are directly or indirectly related to flammable polymer materials, thus promoting the application research of flame retardants or flame retardant materials in polymer materials. Halogenated flame retardants are early and mature flame retardants, but halogenated flame retardants will release harmful gases when materials are burned. With the enhancement of people's awareness of environmental protection, the development of halogenated flame retardants has been restricted. However, in some areas where halogenated flame retardants are used, it is difficult to find suitable substit...

Claims

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Application Information

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IPC IPC(8): C07F7/04C08K5/5415C08L75/08C08L27/06
Inventor 邱小林
Owner 邱小林
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