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:
Jan. 12, 2010
Filed:
Mar. 20, 2007
Sjef Berndsen, Rilland, NL;
Hans Peter Brack, Herrliberg, CH;
Bernd Jansen, Bergen Op Zoom, NL;
Edward Kung, Bergen op Zoom, NL;
Daniel Lowery, Schenectady, NY (US);
Patrick Joseph Mccloskey, Watervliet, NY (US);
Dennis Karlik, Bergen op Zoom, NL;
Gerardo Hidalgo Llinas, Cartagena, ES;
Sjef Berndsen, Rilland, NL;
Hans Peter Brack, Herrliberg, CH;
Bernd Jansen, Bergen Op Zoom, NL;
Edward Kung, Bergen op Zoom, NL;
Daniel Lowery, Schenectady, NY (US);
Patrick Joseph McCloskey, Watervliet, NY (US);
Dennis Karlik, Bergen op Zoom, NL;
Gerardo Hidalgo Llinas, Cartagena, ES;
Sabic Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A method of making polycarbonate includes the steps of forming polycarbonate by a melt transesterification method using an activated diaryl carbonate, and compounding the polycarbonate with a phosphorus-containing compound that has an abstractable proton or hydrolyzable group. The phosphorus-containing compound is compounded with the polycarbonate in an amount sufficient to result in an improvement in the color properties of the polycarbonate as compared to pellets formed from the same polycarbonate without addition of the phosphorus-containing compound.