Polyester and polyamide compositions of low residual...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/13 (2006.01) C08G 63/00 (2006.01) C08L 67/02 (2006.01) C08L 77/00 (2006.01) C08L 29/02 (2006.01) C08L 33/24 (2006.01)

Patent

CA 2466240

A mixture of a polyester or a polyamide, such as poly(ethylene terephthalate) PET, and a suitable stabilizer selected from the group consisting of certain Mannich base compounds, when extrusion compounded exhibits a lower residual acetaldehyde content than does PET or polyamide alone when similarly treated. The invention pertains to any polyester or polyamide used in the manufacture of molded articles, fibers or films, for instance bottles or containers which are used to store consumer materials, for example food, beverages and water.

L'invention concerne un mélange de polyester ou de polyamide, tel qu'un poly(éthylène téréphthalate) (PET), et d'un agent stabilisant approprié sélectionné dans le groupe constitué par certains composés de la base de Mannich, quand les composés d'extrusion présentent un contenu en acétaldéhyde résiduel plus faible que celui qu'on obtient avec un PET seul traité de la même façon. Cette invention concerne n'importe quel polyester utilisé dans la fabrication d'articles moulés, de fibres ou de films, par exemple, des bouteilles ou de récipients qui sont ensuite utilisés pour stocker des produits de consommation, notamment des aliments, des boissons et de l'eau.

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