Polyester/zeolite admixtures

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 3/34 (2006.01) C08K 7/22 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2163660

This invention relates to a polyester/zeolite admixture having an excellent gas barrier property and an improved flavor retaining property, and clarity. More particularly, the present invention relates to a polyester/zeolite admixture wherein the zeolite is present in a critical amount of 100 parts per million (ppm) to 1,000 ppm. The present inventors have determined that addition of small- or medium-pore zeolites in a critical amount to a polyester reduces the concentration of acetaldehyde in the polyester without producing haze and thus improves the storage property, flavor retaining property, and fragrance retaining property of containers made from such polyester.

Cette invention se rapporte à un mélange de polyester/zéolite présentant une excellente propriété de barrière aux gaz ainsi qu'une propriété de conservation de l'arôme améliorée et une bonne transparence. La présente invention se rapporte plus particulièrement à un mélange de polyester/zéolite dans lequel la zéolite est présente dans une quantité critique de 100 parties par million (ppm) à 1000 ppm. Les inventeurs ont déterminé que l'ajout de zéolites aux pores moyens ou petits en quantité critique dans un polyester réduit la concentration de l'acétaldéhyde dans le polyester sans former de voile et améliore ainsi la propriété au stockage, la propriété de conservation de l'arôme et la propriété de conservation du parfum de récipients fabriqués à partir de ce polyester.

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