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. 23, 2015
Filed:
Jun. 21, 2012
Jorge A. Garcia Agudo, Murcia, ES;
Ignacio Vic Fernandez, Santo Angel, ES;
Kazutoyo Uno, Murcia, ES;
Fernando Olmedo Fernandez, Murcia, ES;
Isabel Macian Aviles, Murcia, ES;
Jorge A. Garcia Agudo, Murcia, ES;
Ignacio Vic Fernandez, Santo Angel, ES;
Kazutoyo Uno, Murcia, ES;
Fernando Olmedo Fernandez, Murcia, ES;
Isabel Macian Aviles, Murcia, ES;
Abstract
The present invention provides a melt polymerization reactor system and method of producing polycarbonate using a late-addition catalyst formulation having a melt transesterification catalyst dispersed in a liquid carrier system which preferably includes less than 10 wt % water. The formulation also preferably includes a liquid carrier system having phenol and a cosolvent. The melt transesterification catalyst can be present in the formulation in a range of 50 ppm to 60,000 ppm.