Synthesis of epoxy mono-acrylate

The chromium complex was synthesized by using acetylacetone and chromium(Ⅲ)chloride and the effect of pH on the complex yield was studied.The complex yield could be achieved upto 70% effectively by continue adding base and controlling-maintaining pH value onto 7.0.The chromium complex prepared was used as catalyst to facilitate the esterification reaction of epoxy resins and acrylic acid.The effects of catalyst content,reaction temperature on the reaction rate were investigated.The esterification product was characterized by FT-IR spectroscopy.The results showed that Cr(AcAc)3 was an effective catalyst for the esterification reaction,if the usage of the catalyst was 0.1%～0.2% (mass fraction to epoxy resin and acrylate acid) and the reaction was carried out under 110～120 ℃ for 1.5～2.5 h,high monomer conversion could be achieved effectively.Esterification conversion of epoxy group was about 48.56% on the whole as same as theoretical yield by FT-IR spectroscopy and calculation.