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以三溴苯酚、四氯化硅及环氧乙烷为主要原料,通过三溴苯基环氧丙基醚与四氯化硅反应生成中间产物三溴苯氧基氯丙氧基三氯化硅,再与环氧乙烷反应,合成硅、氯、溴三元素协同高效阻燃剂三溴苯氧基氯丙氧基硅酸三(氯乙基)酯。探讨了反应温度、时间、原料摩尔比对产率的影响,得到反应的最佳合成工艺条件:n(三溴苯基环氧丙基醚)∶n(四氯化硅)∶n(环氧乙烷)=1∶1∶3.2,50℃反应4 h,产率达98.6%。采用FTIR、1HNMR表征了产物的分子结构。应用研究表明,在聚氯乙烯中加入质量分数10%该阻燃剂时,其极限氧指数为28%。
Tribromophenol, silicon tetrachloride and ethylene oxide as the main raw material, through the reaction of tribromophenyl glycidyl ether and silicon tetrachloride to generate intermediate bromine phenoxy chloropropoxy trichlorosilane , And then react with ethylene oxide to synthesize tri (chloroethyl) tribromophenoxy chloropropoxy silicate which is a synergistic high-efficient flame retardant of silicon, chlorine and bromine. The effects of reaction temperature, reaction time and raw material molar ratio on the yield were discussed. The best reaction conditions were obtained: n (tribromophenyl epoxypropyl ether): n (silicon tetrachloride): n Ethane) = 1: 1: 3.2, 50 ℃ for 4 h, the yield reached 98.6%. The molecular structure of the product was characterized by FTIR and 1HNMR. Applied research shows that the limit oxygen index is 28% when the flame retardant is added by 10% by mass in polyvinyl chloride.