The Synthesis Of The Brominated Epoxy Flame Retardants

Bromated epoxy resins is a sort of the Polymerized bromine-containing flame retardants which has excellent flame retardant efficiency and can not easily move from polymer materials.It has been researched and developed abroad recently.Some flame retardant polymer materials added the high molecular weight bromated epoxy resins as flame-retardant additive have been studied that such flame retardant agent has a combination of good fire retardant efficiency, UV stability, excellent mechanical properties, thermal stability and nonblooming, which is the ideal substitute of decabromodiphenyl oxide.Currently, The real domestic industrialization for them commence just now. there is mostly overseas company selling its products of these kinds of flame-retardants in our country. Therefore, the research and development of them is very important.In this paper, Two-step synthesis of the high molecular weight bromated epoxy resins for flame retardants is studied with tetrabromobisphenol A and epichlorohydrin as raw materials.The findings of present work show that raw materials ratio, alkali, catalyst, reaction time, reaction temperature, all of them have influence to the production synthesis. Under the optimized conditions, three sort of products(MW 1. 0×10~4, 2. 0×10~4 and 3. 5×10~4)were prepared. Bromine content of them is all over above 52.0%.All of their thermal decomposition temperature is over 310℃. The structures of finished products which have epoxy group at both end of their molecular chain proved by the infrared spectrum.