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:
Jun. 02, 2009
Filed:
Mar. 20, 2007
Sjef Berndsen, Rilland, NL;
Hans Peter Brack, Herrliberg, CH;
Bernd Jansen, Bergen Op Zoom, NL;
Jan Henk Kamps, Bergen op Zoom, NL;
Edward Kung, Bergen op Zoom, NL;
Daniel Lowery, Schenectady, NY (US);
Patrick Joseph Mccloskey, Watervliet, NY (US);
Paul Michael Smigelski, Jr., Schenectady, NY (US);
Dennis Willemse, Roosendaal, NL;
Sjef Berndsen, Rilland, NL;
Hans Peter Brack, Herrliberg, CH;
Bernd Jansen, Bergen Op Zoom, NL;
Jan Henk Kamps, Bergen op Zoom, NL;
Edward Kung, Bergen op Zoom, NL;
Daniel Lowery, Schenectady, NY (US);
Patrick Joseph McCloskey, Watervliet, NY (US);
Paul Michael Smigelski, Jr., Schenectady, NY (US);
Dennis Willemse, Roosendaal, NL;
Sabic Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A method for preparing a molded article includes the steps of (a) obtaining a polycarbonate resin and (b) molding the polycarbonate resin. The polycarbonate resin is made by a transesterification reaction using an activated diaryl carbonate such that the polycarbonate is susceptible to the formation of internal ester linkages (IEL). The method occurs with the proviso that the polycarbonate resin, the molding conditions or both are selected to control the amount of IEL formed during the molding process to a level of less than 0.4 mol %.