PRODUCTION METHOD FOR COPOLYMERIZED POLYESTER

PROBLEM TO BE SOLVED: To provide a production method for a copolymerized polyester by a direct esterification method using terephthalic acid, the other dicarboxylic acid and glycol, and to provide a method for suppressing a bumping occurred in this production method of the copolymerized polyester by...

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Bibliographische Detailangaben
Hauptverfasser:	TSUKISHIRO TOSHIHIKO, ONABE TAKAYUKI
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 production method for a copolymerized polyester by a direct esterification method using terephthalic acid, the other dicarboxylic acid and glycol, and to provide a method for suppressing a bumping occurred in this production method of the copolymerized polyester by this direct esterification method. SOLUTION: The production method for the copolymerized polyester consisting of the following process (A) and (B), is provided. In the process (A), terephthalic acid, at least a dicarboxylic acid excepting terephthalic acid, and a glycol, are reacted in heating to form a dicarboxylic diglycol ester and/or its prepolymer. In the process (B), the dicarboxylic glycol ester and/or its prepolymer are polycondensed.