PRODUCTION OF A POLYCARBONATE WITH LIMITED METAL RESIDUALS

摘要

A method for producing a polycarbonate comprising: reacting a diaryl carbonate with a dihydroxy compound to form a polycarbonate, wherein the polycarbonate comprises: less than or equal to 1000 ppb of molybdenum; less than or equal to 33 ppb of vanadium; less than or equal to 33 ppb of chromium; less than or equal to 375 ppb of niobium; less than or equal to 33 ppb of nickel; less than or equal to 10 ppb of zirconium; and less or equal to 10 ppb iron.

主权项

1. A method for producing a polycarbonate comprising:
reacting a diaryl carbonate with a dihydroxy compound to form a polycarbonate, wherein the polycarbonate comprises:
less than or equal to 500 ppb of molybdenum based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 33 ppb of vanadium based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 33 ppb of chromium based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 75 ppb of titanium based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 375 ppb of niobium based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 33 ppb of nickel based on the total weight of the diaryl carbonate and the metal contaminant;less than or equal to 750 ppb of zirconium based on the total weight of the diaryl carbonate and the metal contaminant; andless or equal to 10 ppb iron based on the total weight of the diaryl carbonate and the metal contaminant.