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. 21, 2008
Hans-peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Churra-Murcia, ES;
Jorge Garcia Agudo, Murcia, ES;
Jan Henk Kamps, Bergen op Zoom, NL;
Hans Looij, Bergen op Zoom, NL;
Fernando Olmedo Fernandez, Cartagena, ES;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
Hans-Peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Churra-Murcia, ES;
Jorge Garcia Agudo, Murcia, ES;
Jan Henk Kamps, Bergen op Zoom, NL;
Hans Looij, Bergen op Zoom, NL;
Fernando Olmedo Fernandez, Cartagena, ES;
Dennis James Patrick Maria Willemse, Standdaarbuiten, NL;
SABIC Innovative Plastics IP B.V., Bergen op Zoom, NL;
Abstract
A method of making a polycarbonate is described. The method comprises melt reacting an ester-substituted diaryl carbonate and a multifunctional compound of the formula: in the presence of catalyst to form an oligomer comprising less than 2,000 ppm of an ester-linked terminal group, and melt polymerizing the oligomer to form a polycarbonate. Use of specific reaction conditions produces a polycarbonate having an Mw of greater than or equal to 25,000 g/mol as determined by gel-permeation chromatography relative to polystyrene standards. Polycarbonates comprising units derived from the multifunctional compound, including homopolycarbonates, aliphatic copolycarbonates further comprising units derived from an aromatic dihydroxy compound, and aliphatic polycarbonate-polyesters, are also disclosed, as are a thermoplastic composition and an article including the disclosed polycarbonates.