The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2010
Filed:
May. 16, 2008
Hans-peter Brack, Herrliberg, CH;
Peter K. Davis, Niskayuna, NY (US);
David Domingo Fuster, Oviedo, ES;
Jorge Garcia Agudo, Murcia, ES;
Gerardo Hidalgo Llinas, Cartagena, ES;
Miguel Angel Salomon Cheliz, Zaragoza, ES;
Ignacio Vic Fernandez, Murcia, ES;
Laurus Van Der Wekke, Rucphen, NL;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
Hans-Peter Brack, Herrliberg, CH;
Peter K. Davis, Niskayuna, NY (US);
David Domingo Fuster, Oviedo, ES;
Jorge Garcia Agudo, Murcia, ES;
Gerardo Hidalgo Llinas, Cartagena, ES;
Miguel Angel Salomon Cheliz, Zaragoza, ES;
Ignacio Vic Fernandez, Murcia, ES;
Laurus van der Wekke, Rucphen, NL;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
Sabic Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A method of forming polycarbonate includes the steps of introducing a plurality of reaction components to a reactor operating under melt polymerization conditions and removing ester-substituted phenol from the reactor. The plurality of reaction components include a dihydroxy compound, an ester-substituted diaryl carbonate, and a melt transesterification catalyst. The reaction components are introduced in a plurality of reaction component streams. A first reaction component streams includes a melt transesterification catalyst dissolved or suspended in a liquid carrier containing an ester-substituted phenol. The composition of the first reaction component stream is selected such that ester-substituted phenol is not generated as a reaction product in the first reaction component stream.