POLYESTER AND BLOW MOLDED ARTICLE MADE THEREFROM

PROBLEM TO BE SOLVED: To obtain a polyester resin generating little acetaldehyde in the molding of a preform or a bottle. SOLUTION: The polyester is formed from terephthalic acid and/or isophthalic acid and ethylene glycol. It has an intrinsic viscosity of ≥0.60 [dl/g] and a density of ≥1,390 kg/m3a...

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Hauptverfasser:	KOREISHI HIROSHI, YAMADA NAOHIRO, HAMA TAKASHI, MUKAI NOBUTADA
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 obtain a polyester resin generating little acetaldehyde in the molding of a preform or a bottle. SOLUTION: The polyester is formed from terephthalic acid and/or isophthalic acid and ethylene glycol. It has an intrinsic viscosity of ≥0.60 [dl/g] and a density of ≥1,390 kg/m3and satisfies the formula 1: (AA4h-AA1h)≤1.0 ppm wherein AA1his the weight ratio of AA (acetaldehyde) extracted in hot water under the condition of 120°C×1hr and AA4his the weight ratio of AA extracted in hot water under the condition of 120°C×4hr. COPYRIGHT: (C)2005,JPO&NCIPI