Yuan Shi-tao
2011
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Journal
Applied Chemical Industry
Abstract
Triethylene glycol bis[β-(3-tert-butyl-5-methyl-4-hydroxyphenyl)propionate](antioxidant245)was synthesized using methyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate(Ky250) and triethylene glycol as starting materials and organotin as catalyst by transesterification.The influence of temperature,time,catalyst dosage and n(Ky250) ∶ n(TEG) on product yield were studied.The obtained optimum reaction conditions were:n(Ky250) ∶ n(TEG) ∶ n(organotin)=2.1 ∶ 1 ∶ 0.004,reaction temperature 185 ℃,reaction time 6 h.Under above conditions,the yield and purity of the product were over 86% and 99%,respectively.The structure of the product was characterized by FTIR.