低級オレフィンのオキシド, グリコールおよびポリグリコールの製造に関する研究 (第7報) : ポリプロピレングリコールの製造

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Authors studied liquid phase polymerisation of propylene oxide using alkali catalyst in the presence and absence of propylene glycol as starting material.<BR>The effects of catalyst concentration, reaction temperature, mole ratio of propylene glycol to propylene oxide etc. on the reaction velocity, the average molecular weight and unsaturation of the polymer were investigated.<BR>By selecting these reaction conditions it became more feasible to prepare the polypropyleneglycol having any reguired average molecular weight and unsaturation as low as the urethane-grade.