[EN] POLYCARBONATE PRODUCTION METHOD<br/>[FR] PROCEDE DE PRODUCTION DE POLYCARBONATE
申请人:GEN ELECTRIC
公开号:WO2000077073A2
公开(公告)日:2000-12-21
A polycarbonate production method, characterized in that a dihydroxy compound and a carbonic acid diester are subjected to melt polycondensation in the presence of a catalyst containing an alkali metal compound and/or alkaline-earth metal compound in an amount of 1 x 10-8 to 1 x 10-5 mol per mole of dihydroxy compound; wherein a sulfonic acid ester compound and a transition metal scavenger are also added to the reaction product; and wherein the polycarbonate is treated at a reduced pressure.