Abstract Dibiphenol A pentaerythritol diphosphite was synthesized by using pentaerythritol,phosphorus trichloride and bisphenol A as raw material.The effects of reaction solvent,reaction time and molar ratio of the raw material on yields were analyzed.The experimental results show that the optimum conditions were as follows:molar ratio of pentaerythritol to phosphorus trichloride to bisphenol A was 1.0��2.8��2.0,the first and the second reaction held for about 3 h on the conditions of refluxing.The product,under this conditions,was a white flour solid and the melting point was 146 �桪148 ��,the yield of the product was about 93%.Elemental analysis,IR,and(()~1HNMR) were performed to characterize the structure of the product.
2005, Vol. 22 
