Process for the preparation of copolycarbonates of sulfonyl...

Details Process for the preparation of copolycarbonates of sulfonyl... Process for the preparation of copolycarbonates of sulfonyl...

C - Chemistry, Metallurgy

08

G

402/178

C08G 64/24 (2006.01) C08G 64/08 (2006.01)

Patent

CA 1223685

A PROCESS FOR THE PREPARATION OF COPOLYCARBONATES OF SULFONYL DIPHENOL ABSTRACT OF THE DISCLOSURE The present invention is directed to a contin- uous process for the preparation of copolycarbonates of sulfonyl diphenol (SDP) containing at least about 15, preferably about 15 to about 80 percent by weight of SDP and characterized in the particular system catalyzing the process reaction. The invention thus entails improve- ments and modifications to the known interfacial poly- condensation process rendering it applicable to the preparation of copolycarbonates containing a high level of SDP comprising a combination of catalysts namely a phase transfer catalyst and a condensation catalyst.

477519

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