Synthesis of water-soluble photoinitiator of thioxanthone derivates

2-Hydroxy-thioxanthone(TX1)was prepared with thiosalicylic acid and phenol as reactants and concentrated sulfuric acid as catalyst,which was converted to 2-hydroxy-3-(9-oxo-9H-thiox-anthen-2-yloxy)-propyl-trimethyl-ammonium chloride(TX2).The influence of feed ratio,temperature and pH value on the yield of products was discussed.The structure of products was proved by means of FTIR,NMR and elemental analysis.The water-solubility and photo-sensitivity of prepared TX1 and TX2 were investigated by comparing with the commercial photoinitiator Iragcure184D(α-hydroxyketone photoinitiator).