MELT FILTER ALIGNMENT IN A CONTINUOUS MELT POLYCARBONATE PRODUCTION PROCESS

摘要

In an embodiment, a continuous melt polycarbonate polymerization process, comprises melt polymerizing a carbonate compound and dihydroxy compound in the presence of a catalyst composition to form a polymerized polycarbonate; adding a viscosity reducing agent to polymerized polycarbonate upstream of a first melt filter to form an adjusted polycarbonate; replacing the first melt filter with a replacement melt filter; introducing the adjusted polycarbonate to the replacement melt filter; and reducing the addition rate of the viscosity reducing agent until the addition rate is 0 mol/hr.