TY - PAT
T1 - PROCESS FOR THE PRODUCTION OF POLYCARBONATE USING AN ESTER SUBSTITUTED DIARYL CARBONATE
AU - Willemse, Dennis
AU - Belfadhel, Hatem
AU - Brack, Hans-Peter
AU - Fernandez Ignacio, Vic
AU - Garcia Agudo, Jorge
AU - De Grooth, Joris
AU - Hidalgo Llinas, Gerardo
AU - McCloskey Patrick, Joseph
AU - Obando, Louis
AU - Oyevaar Martin, Herke
AU - Van Der Wekke, Laurus
PY - 2008/11/20
Y1 - 2008/11/20
N2 - 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 transesterification catalyst where the ester substituted diaryl carbonate mixture may contain acid-substituted 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.
AB - 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 transesterification catalyst where the ester substituted diaryl carbonate mixture may contain acid-substituted 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.
M3 - Patent
M1 - US2008287640
ER -