Invention Grant
- Patent Title: Method for the manufacture of polycarbonate
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Application No.: US17284270Application Date: 2019-09-12
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Publication No.: US12077635B2Publication Date: 2024-09-03
- Inventor: Ignacio Vic Fernandez
- Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
- Applicant Address: NL Bergen op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee Address: NL Bergen op Zoom
- Agency: CANTOR COLBURN LLP
- Priority: EP 382731 2018.10.11
- International Application: PCT/IB2019/057718 2019.09.12
- International Announcement: WO2020/074983A 2020.04.16
- Date entered country: 2021-04-09
- Main IPC: C08G64/14
- IPC: C08G64/14 ; C08G64/30

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.
Public/Granted literature
- US20210347938A1 METHOD FOR THE MANUFACTURE OF POLYCARBONATE Public/Granted day:2021-11-11
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