Flame retardant ethylenedioxy dual-silicate propyl bromide and preparation method thereof

Abstract

The invention relates to a flame retardant ethylenedioxy dual-silicate propyl bromide compound and a preparation method thereof. The compound has the structure shown as the formula specified in the specification, wherein-OC3H6Br is 2-bromo-1-propoxy or 1-bromo-2-propoxy or a mixture of the 2-bromo-1-propoxy and the 1-bromo-2-propoxy. The preparation method comprises the following steps: dropwise adding bromopropanol into an organic solution of silicon tetrachloride at a temperature being below 25 DEG C, and reacting for 2 hours at 45 DEG C, wherein the molar mass of the bromopropanol is equal to that of the silicon tetrachloride; dropwise adding ethylene glycol and reacting for 6-10 hours at 55-75 DEG C, wherein the molar mass of the ethylene glycol is 0.5 time that of the silicon tetrachloride; cooling to the temperature being below 40 DEG C, dropwise adding the bromopropanol, and reacting for 6-10 hours at 65-85 DEG C, wherein the bromopropanol is 2-3 times that of the silicon tetrachloride; adding a small amount of acid binding agent, preserving heat and stirring for 1 hour; performing purification to obtain the flame retardant ethylenedioxy dual-silicate propyl bromide. The compound disclosed by the invention is suitable to be as the flame retardants of the materials such as polyvinyl chloride, polyurethane, epoxy resin and unsaturated resin, is simple in preparation process and low in cost, and can be put into industrial production easily.

Description

technical field

[0001] The invention relates to a flame retardant ethylenedioxyethylene disilicate bromopropyl ester compound and a preparation method thereof, in particular to a flame retardant bis[tris(bromopropoxy)silyloxy]ethane compound and its preparation method. The preparation method, the compound can be used as a flame retardant for materials such as polyvinyl chloride, unsaturated polyester, polyurethane and epoxy resin. Background technique

[0002] At present, organic synthetic polymer materials are widely used, and 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 materials, thus promoting the research of flame retardants or flame retardant materials. Adding flame retardants to materials is an effective way to achieve flame retardancy and fire protection. Traditional halogen-based flame retardants will release harmful gases when materials are burned. With the ...

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