One-pot synthesis of polyethylene glycol 400 glucoside rosin ester under atmospheric-pressure.

Polyethylene glycol 400(PEG 400) glucoside rosin ester was synthesized with ethylene glycol 400,rosin and starch as raw material and p-toluene sulfonic acid as catalyst using one-pot method under atmospheric pressure.The optimum synthesis conditions were obtained as follows: ratio of n(PEG 400)∶n(glucose unit of starch)∶n(rosin)4.5∶1.5∶1,mass of catalyst 10%(based on rosin mass),reaction time 7h,reaction temperature 200℃ and acid value was less than 5mg/g.The acid value of the product refined by CaO was less than 1mg/g.The prepared sample was identified using infrared spectroscopy and elemental analysis.The synthesized product possesses good emulsifying performance.