Process for chemical recycling of polycarbonates

Method for the chemical recycling of thermoplastic aromatic polycarbonates comprises (1) breaking them down to oligocarbonates with diaryl carbonate in the presence of a catalyst; (2) opt. removing insol. particles; (3) crystallising; (4) cleaning; and (5) carrying out a polycondensation reaction to...

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Bibliographic Details
Main Authors BUYSCH, HANS-JOSEF, KUEHLING, STEFFEN
Format Patent
LanguageEnglish
French
German
Published 01.09.1999
Edition6
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:Method for the chemical recycling of thermoplastic aromatic polycarbonates comprises (1) breaking them down to oligocarbonates with diaryl carbonate in the presence of a catalyst; (2) opt. removing insol. particles; (3) crystallising; (4) cleaning; and (5) carrying out a polycondensation reaction to give the thermoplastic polycarbonate.
Bibliography:Application Number: EP19950108833