A melamine salt of 2,2-bis(hydroxmethyl)-1,3-propanediyl bis(dihydrogen phosphate)was prepared from phosphous oxychloride,pentaerythritol and melamine.By orthogonal experiment,the optimum conditions of synthesis were obtained.Its structure was confirmed by melting point,element analysis and IR.The compound was further modified by using formaldehyde and proper hydrophilic auxiliary,and a new multi-functional melamine resin tanning agent with flame resistance was obtained.The experimental results show that the product has high-stability,good-solubility,high efficient flame resistance and good capability of retanning-filling.
