PROCESS AND APPARATUS FOR PREPARING AROMATIC POLYCARBONATE

PROCESS AND APPARATUS FOR PREPARING AROMATIC POLYCARBONATE

PROBLEM TO BE SOLVED: To provide a technique to efficiently prepare an aromatic polycarbonate with favorable hue and stable physical properties. SOLUTION: Preparation of molten raw material mixtures of the aromatic dihydroxy compounds of molten carbonic acid diesters and a solid (powder, prilled for...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SHIMONARI MASASHI, SAWAKI TORU, SASAKI KATSUJI, MIYAUCHI TETSUO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a technique to efficiently prepare an aromatic polycarbonate with favorable hue and stable physical properties. SOLUTION: Preparation of molten raw material mixtures of the aromatic dihydroxy compounds of molten carbonic acid diesters and a solid (powder, prilled form and so forth) comprises using a vertical mixer constructed according to a specific design condition. The molten raw material mixtures prepared under a specific melting condition are continuously supplied to a polymerizing vessel to proceed further polymerization. COPYRIGHT: (C)2003,JPO