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Study on the Synthesis of Flame Retardant BDP

ZHENG Jin-yu(Xiangshui Yake Chemical Co.Ltd.,Yancheng 224631,China)  
This ariticle reported that the flameretardant BDP was synthesised with phosphorus oxychloride,bisphenol-A and phenol as raw materials.The effects of molecular ratio,reactant temperature and reactant time on the quality and yield of the product was studied.The optimum reaction conditions are follows:phosphorus oxychloride:bisphenol-A:phenol is 6:1:4.05.The temperature of acylchlorination is 120℃ and reaction time is 3.5h.The esterification temperature is 120℃and reaction time is 3h at first,and then is 150℃ for 3h.Under the optimum reaction conditions,the yield of the product can be up to 91.12%.The content of BDP(N=1)can be up to 83.68%.
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