Method for the manufacture of polycarbonate
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.
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