POLYESTER AND ITS PREPARATION METHOD

PROBLEM TO BE SOLVED: To provide a polyester resin having a high gas barrier property and heat resistance, and crystallivity. SOLUTION: The polyester resin is characterized in that the resin comprises a predetermined amount of a terephthalic acid unit, a succinic acid unit, and an ethylene glycol un...

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Bibliographische Detailangaben
1. Verfasser:	TAN JUNJI
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 polyester resin having a high gas barrier property and heat resistance, and crystallivity. SOLUTION: The polyester resin is characterized in that the resin comprises a predetermined amount of a terephthalic acid unit, a succinic acid unit, and an ethylene glycol unit, according to demand, an isophthalic acid unit and/or a 2,6-naphthalenedicarboxylic acid unit, and a melt peak temperature to be measured with DSC, heat of fusion ΔHfa (J/g), permeability constant Pa of a carbon dioxide gas to the film, and modulas in tension YMa (MPa) when a press molded sheet was measured at 23 deg.C are each in a specific range.