APPARATUS FOR CARRYING OUT A POLYCONDENSATION REACTION CONTINUOUSLY

Bis-2-hydroxyethyl terephthalate which has undergone preliminary condensation to a low viscosity is polymerized to a high viscosity in apparatus comprising a substantially horizontal reaction tank having an inlet near each end for the starting material, an outlet near the middle of the tank for the...

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Bibliographische Detailangaben
Hauptverfasser:	NAOYUKI MITANI, REI YOKOUCHI YOSHIO TAKEHISA, KO YUGE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Bis-2-hydroxyethyl terephthalate which has undergone preliminary condensation to a low viscosity is polymerized to a high viscosity in apparatus comprising a substantially horizontal reaction tank having an inlet near each end for the starting material, an outlet near the middle of the tank for the reaction product, and agitating and advancing means for conveying the reaction mixture from the inlets to the outlets (see Division B1). In Examples 1 and 2, the reaction conditions are respectively: temperature 280 DEG C., 285 DEG C.; pressure 5 mm. Hg, 6 mm. Hg; average intrinsic viscosity of polymer obtained, measured in o-chlorophenol at 25 DEG C., 0.67, 0.64.