PRODUCTION METHOD OF POLYCARBONATE RESIN

PROBLEM TO BE SOLVED: To provide a polycarbonate resin for a photo-recording medium and a sheet, suitable for high-temperature molding and continuous sheet molding, having excellent heat stability, which has an eliminated dimer carbonate and a small difference in molecular weights between surface an...

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Bibliographische Detailangaben
Hauptverfasser:	SHIOMI KAZUAKI, MIZUTANI MAKOTO, ASAO TOSHIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a polycarbonate resin for a photo-recording medium and a sheet, suitable for high-temperature molding and continuous sheet molding, having excellent heat stability, which has an eliminated dimer carbonate and a small difference in molecular weights between surface and middle layers of the molding, in a production method of the polycarbonate resin. SOLUTION: In the production method of the polycarbonate resin comprising an interfacial polymerization method or a solution polymerization method, the method comprises directly adding a molecular weight modifier in a melting state with agitating to a reaction system.