MANUFACTURING PROCESS OF POLYBUTYLENE TEREPHTHALATE

PROBLEM TO BE SOLVED: To provide a manufacturing process of polybutylene terephthalate, which is improved to be manufactured constantly by stabilizing the inversion rate and also stabilizing the amount of foreign materials commingled in polybutylene terephthalate at the time of an esterification or...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO MASANORI, AKAHA YOSHIO, FUJINO HIDEYUKI
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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a manufacturing process of polybutylene terephthalate, which is improved to be manufactured constantly by stabilizing the inversion rate and also stabilizing the amount of foreign materials commingled in polybutylene terephthalate at the time of an esterification or transesterification reaction. SOLUTION: The manufacturing process of polybutylene terephthalate comprises the steps of continuously supplying terephthalic acid(or alkyl terephthalate) and 1,4-butane diol with an excess amount to the terephthalic acid to an esterification reaction tank (or transesterification reaction tank) in the presence of a metal compound and carrying out the esterification (or the transesterification reaction), wherein the mole ratio of terephthalic acid to 1,4-butane diol supplied into the esterification tank(or the transesterification reaction tank) for a unit time is controlled to be constant. COPYRIGHT: (C)2005,JPO&NCIPI