A METHOD FOR PREPARING POLYCARBONATE

摘要

PURPOSE: A manufacturing method of polycarbonate is provided to offer the polycarbonate which improves the physical property including low temperature impact intensity, weather-resistant, and high temperature stability etc. CONSTITUTION: A manufacturing method of polycarbonate comprises: a step which polymerizes an aromatic series dihydroxy compound and diaryl carbonate under the presence of a first catalyst; a step which inputs an end-capping agent; a step which inputs an acid compound. The manufacturing method additionally comprises a step which inputs additives after the step which inputs the acid compound. The polymerization reaction is a fusion polymerization reaction. The end-capping agent is inputted as the amount of 100-6,000 ppm for the aromatic dihydroxy compound.