L. Wei-wei
2008
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Journal
Fine chemicals
Abstract
The bisphenolmonoacryates antioxidant 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)-ethyl]-4,6-di-tert-pentylphenyl acrylate(GS) of bifunctional stabilizing mechanism was reported recently.New technology for synthesis of GS is studied with 2,2′-ethylidenebis(4,6-di-tert-pentylphenol)(EBAP),acrylic acid and phosphorus oxychloride as raw materials in molar ratio 1∶1.08∶1.05,and copper acetate as catalyst and polymerization inhibitor in the presence of triethylamine(m(EBAP)∶m(triethylamine)∶m(copper acetate)=1∶0.67∶0.007),reacting at 60~65 ℃ for 1.0~1.5 h.Under these conditions,the yield of GS is over 80.6%.The product is white crystal,w(GS) over 99.5% by liquid chromatography,and melting point 117.6~118.2 ℃.The GS synthesis was scaled-up and proceeded in 10 t/a.