Polyester compositions of low residual aldehyde content

C - Chemistry – Metallurgy – 08 – F

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C08F 220/18 (2006.01) B65D 1/09 (2006.01) B65D 65/02 (2006.01) B65D 65/38 (2006.01) B65D 65/40 (2006.01) C08F 20/20 (2006.01) C08F 212/08 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2454399

A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a suitable stabilizer selected from the group consisting of polyhydric alcohol- containing polymers and copolymers derived from 2-propenoic acid ester monomers, when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.

La présente invention concerne un mélange d'un polyester, tel qu'un poly(éthylène téréphtalate (PET), et d'un stabilisateur adapté sélectionné dans le groupe constitué de polymères contenant un polyol et de copolymères dérivés de monomères d'ester d'acides 2-propenoïque, 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 de bouteilles ou de récipients qui sont ensuite utilisés pour stocker des produits de consommation, en particulier des aliments, des boissons et plus particulièrement de l'eau.

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