COPOLYESTER AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a copolyester and its manufacturing method suitable for a container or the like having gas barrier property, having high molecular weight and excellent in impact resistance, good in transparency and low in generation of a cyclic oligomer. SOLUTION: This copolyester c...

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Bibliographische Detailangaben
1. Verfasser:	KINUGAWA MASAYUKI
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a copolyester and its manufacturing method suitable for a container or the like having gas barrier property, having high molecular weight and excellent in impact resistance, good in transparency and low in generation of a cyclic oligomer. SOLUTION: This copolyester comprises acid components comprising isophthalic acid, terephtahlic acid and an alkali metal salt of 5-sulfoisophthalic acid or an alkali earth metal salt of 5-sulfoisophthalic acid, and their mole ratio satisfies a specific formula and ethylene glycol and including copolymerized phosphorus compounds in amount of 1×10-4-200×10-4 mole per mole of the acid components, and the solution haze of the copolyester is =10,000.