Preparation and properties of novel silicate ester flame retardative agent

Novel efficient flame retardants-silicate tetra(tribromophenoxy chloropropyl)ester with silicon,chlorine and bromine three-element synergism was synthesized when tribromophenoxy chloropropanols and silicon tetrachloride were taken as its main raw materials.The effects of reaction temperature and time on the reaction yield were investigated,and the optimum reaction conditions were obtained as follows:the reaction temperature was 120℃,reaction time was 6h,and amount ratio of substance of silicon tetrachloride to tribromophenoxy chloropropanols was 1∶4.The percentage of the reaction yield could reach 97.6%.It was shown by the results of FTIR,1 H NMR characterization that the product structures were consistent with the target product.Limit oxygen index test result revealed that it would have an excellent flame retardative properties.