PROCESS FOR PREPARING COPOLYESTERS OF TEREPHTHALIC ACID, ETHYLENE GLYCOL AND 1, 4-CYCLOHEXANEDIMETHANOL EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS

PROCESS FOR PREPARING COPOLYESTERS OF TEREPHTHALIC ACID, ETHYLENE GLYCOL AND 1, 4-CYCLOHEXANEDIMETHANOL EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS

THIS INVENTION RELATES TO A THREE STEP PROCESS FOR PREPARING COPOLYESTERS EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS. THE PROCESS INVOLVES REACTING TEREPHTHALIC ACID, ETHYLENE GLYCOL, AND 1, 4-CYCLOHEXANEDIMETHANOL IN A FEED MOLE RATIO OF TOTAL GLYCOLS TO DICARBOXYLIC ACID OF 1....

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JAMES EARL HATAWAY, KENNETH ALAN ROBERTS, VALERIE SUE ADAMS
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
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:THIS INVENTION RELATES TO A THREE STEP PROCESS FOR PREPARING COPOLYESTERS EXHIBITING A NEUTRAL HUE, HIGH CLARITY AND INCREASED BRIGHTNESS. THE PROCESS INVOLVES REACTING TEREPHTHALIC ACID, ETHYLENE GLYCOL, AND 1, 4-CYCLOHEXANEDIMETHANOL IN A FEED MOLE RATIO OF TOTAL GLYCOLS TO DICARBOXYLIC ACID OF 1.7 :1 TO 6. 0:1. AT A TEMPERATURE OF 240°C TO 280°C, AND A PRESSURE OF 15 PSIG (200 KPA) TO 80 PSIG (650 KPA) TO FORM AN ESTERIFICATION PRODUCT; ADDING A POLYCONDENSATION CATALYST AND A TONER; AND POLYCONDENSING THE PRODUCT AT A TEMPERATURE OF 260°C TO 290°C AND A REDUCED PRESSURE TO FORM A HIGH MOLECULAR WEIGHT COPOLYESTER.