Preparation and Property of Bisphenol A Bis (diphenyl phosphate) Oligomer

Bisphenol A bis(diphenyl phosphate)oligomer(BDP)is prepared successfully from the reactants consisting of phosphorus oxychloride(POCl3),bisphenol A and phenol with a Friedel-Crafts catalyst.The resultant products were examined with thermo-gravimetric analysis(TGA)and high performance liquid chromatography(HPLC).Thermogravimetry data shows that BDP decomposes at 375 ℃ when 5% weight lost.Experiments results show that catalyst is preferably AlCl3 and the amount of it is preferably 1% relative to bisphenol A by mole.POCl3/bisphenol A mole ratio is preferably about 5∶1 to 6∶1.Experiments unclosed that a seal apparatus is very important to the properties of product.