PROCESS FOR THE PREPARATION OF VINYLAROMATIC POLYMERS

PROCESS FOR THE PREPARATION OF VINYLAROMATIC POLYMERS

Continuous mass polymerisation process for the preparation of vinyl aromatic polymers includes:continuously feeding at least one vinyl aromatic monomer and at least one radical initiator to a mixing device, obtaining a reaction mixture;feeding the reaction mixture to a Continuous Stirred Tank Reacto...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LONGO, Aldo, FIOROTTO, Nicola, CASALINI, Alessandro, SONCIN, Emilj
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:Continuous mass polymerisation process for the preparation of vinyl aromatic polymers includes:continuously feeding at least one vinyl aromatic monomer and at least one radical initiator to a mixing device, obtaining a reaction mixture;feeding the reaction mixture to a Continuous Stirred Tank Reactor (CSTR) and in liquid phase leaving the CSTR to at least one Plug Flow Reactor (PFR);recycling, to the mixing device, a fraction of the reaction mixture in liquid phase leaving the at least one PFR, the fraction between 25% and 50% by mass with respect to total mass of reaction mixture in liquid phase leaving the at least one PFR;feeding the remaining fraction of the reaction mixture in liquid phase leaving the at least one PFR, to a devolatilisation system; andfeeding the polymer leaving the devolatilisation system or additive system, to a granulation system and recovering the polymer.