Solid-State Polymerization method using microwave radiation and gas flow containing vapor having high dipole moment

摘要

The present invention in the use with the gas that is removed, the heating method and the heating facilitating and by-product using a microwave in the solid state polymerization effect containing a vapor of a liquid having a large dipole moment for the molecular weight increase of polycarbonate resin, the reaction speed and by-product by obtaining a synergistic effect of improving the removal rate, and a method for producing a high molecular weight polycarbonate of high quality efficiently. ; More specifically to preparing an aromatic dihydroxy compound and a prepolymer method of producing a polycarbonate resin to perform crystallization by solid-phase polymerizing a prepolymer polymerized from a diaryl carbonate, having a viscosity average molecular weight in a specific range; Step to create the prepolymer to particles having the size of a specific range; By polymerization while flowing a gas containing the vapor obtained by vaporizing the liquid a large dipole moment in the prepolymer particle solid phase was added to the microwave, and a method for producing the polycarbonate resin of the high molecular weight superior quality in a short time. ; Microwave, prepolymer, steam, a solid-state polycondensation, polycarbonate