Preparation method for flame retardant

A technology of flame retardants and flasks, which is applied in chemical instruments and methods, compounds of group 4/14 elements of the periodic table, silicon organic compounds, etc., can solve problems such as difficulty in finding substitutes, and achieve cost savings and wide application Space, high flame retardant effect

Inactive Publication Date: 2018-03-23
SHAANXI JUJIEHAN CHEM CO LTD
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  • Application Information

AI Technical Summary

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

Method used

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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 reduce the temperature of the reaction system to 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 0.05mol 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 discloses a method for preparing a flame retardant, which belongs to the field of material preparation. Include the following steps: dioxane and silicon tetrachloride in a flask; under stirring, cool with a cold water bath, add dropwise 3-dichloro-2-propanol, after the HCl gas is released, drop ethylene glycol into the four-necked flask, after the HCl gas is released, drop 3-dichloro-2-propanol, and after the HCl gas is released, add melamine, keep stirring for 1h, and the pH value of the solution reaches 5 ~ 6 as The end of the reaction: the reaction system is cooled and suction filtered, the filtrate is distilled under reduced pressure to remove dioxane and low boiling point substances, then petroleum ether is added to stir and wash, and the petroleum ether is removed under reduced pressure to obtain the product EDSD. Through the effective improvement of the traditional preparation process, the synthetic raw material of the flame retardant utilizes silicon tetrachloride, a by-product of polysilicon, and the prepared flame retardant has higher flame retardant performance, and the preparation process is simple and cost-saving. The present invention The preparation method of the flame retardant has broad 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 substitut...

Claims

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Application Information

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IPC IPC(8): C07F7/02C07F7/04
CPCC07F7/025C07F7/04
Inventor 李长英
Owner SHAANXI JUJIEHAN CHEM CO LTD
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