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:
Sep. 03, 2024
Filed:
Sep. 12, 2019
Sabic Global Technologies B.v., Bergen op Zoom, NL;
Ignacio Vic Fernandez, Murcia, ES;
SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom, NL;
Abstract
A method for the continuous multi-stage manufacture of an end-capped polycarbonate includes, i) preparing a monomer mixture in a monomer mixing stage by mixing a bisphenol, a diaryl carbonate and optionally a transesterification catalyst in at least one monomer mixing device, ii) preparing a carbonate oligomer in an oligomerisation stage by reacting the monomer mixture in at least one oligomerisation reactor, and iii) preparing the polycarbonate in a polymerisation stage by further reacting the carbonate oligomer of the oligomerisation stage in at least one polymerisation reactor, in which an end-capping agent different from phenol and having a single phenolic hydroxy group is added to the monomer mixture in the monomer mixing stage and/or to at least one oligomerisation reactor in the oligomerisation stage.