摘要 |
<p>A method of preparing polycarbonate includes a steps of providing a melt reaction mixture and allowing the melt reaction mixture to react to build molecular weight, thereby preparing the polycarbonate. The melt reaction mixture has a dihydroxy compound, an ester substituted diaryl carbonate mixture, and a melt trans esterification catalyst where the ester substituted diaryl carbonate mixture may contain acidsubstituted phenol. The method also includes the step of adjusting the molar ratio of acid-substituted phenol, if present, to melt transesterification catalyst (acid-substituted phenol/catalyst) in the melt reaction mixture to an amount of less than 10.</p> |
申请人 |
GENERAL ELECTRIC COMPANY;BELFADHEL, HATEM;BRACK, HANS-PETER;FERNANDEZ, IGNACIO, VIC;GARCIA AGUDO, JORGE;DE GROOTH, JORIS;HIDALGO, LLINAS, GERARDO;MCCLOSKEY, PATRICK, JOSEPH;OBANDO, LOUIS;OYEVAAR, MARTIN, HERKE;VAN DER WEKKE, LAURUS;WILLEMSE, DENNIS |
发明人 |
BELFADHEL, HATEM;BRACK, HANS-PETER;FERNANDEZ, IGNACIO, VIC;GARCIA AGUDO, JORGE;DE GROOTH, JORIS;HIDALGO, LLINAS, GERARDO;MCCLOSKEY, PATRICK, JOSEPH;OBANDO, LOUIS;OYEVAAR, MARTIN, HERKE;VAN DER WEKKE, LAURUS;WILLEMSE, DENNIS |