Improved method for producing poly (aryl ether ketone) using high purity 4,4'-difluorobenzophenone

摘要

The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the removal of such impurities.