C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/10 (2006.01) B65D 53/00 (2006.01) C08K 5/04 (2006.01)
Patent
CA 2443526
The present invention relates to closure elements for containers comprising a sealing element, the sealing element comprising a thermoplastic polymer and an effective absorbing amount of a cyclodextrin material; wherein the cyclodextrin material is selected from the group comprising .alpha.- cyclodextrin, .beta.-cyclodextrin, .gamma.-cyclodextrin, derivatives of .alpha.-cyclodextrin, .beta.-cyclodextrin and .gamma.-cyclodextrin and mixtures thereof. It has been found, that the sealing elements show excellent barrier properties with respect to permeants, such as aromatic substances, especially trichloroanisole, aldehydes or ketones and/or impurities from the polymer.
L'invention concerne des pièces de fermeture pour des conteneurs comportant une pièce d'étanchéité, celle-ci comportant un polymère thermoplastique et une quantité absorbante efficace de matériau à base de cyclodextrine. Ledit matériau à base de cyclodextrine est sélectionné dans le groupe comprenant alpha -cyclodextrine, beta -cyclodextrine, gamma -cyclodextrine, des dérivés de alpha -cyclodextrine, beta -cyclodextrine et gamma -cyclodextrine ainsi que des mélanges de ceux-ci. Il a été découvert que les pièces d'étanchéité présentent d'excellentes propriétés barrières par rapport aux substances perméables, comme les substances aromatiques, en particulier le trichloroanisole, les aldéhydes ou les cétones et/ou les impuretés du polymère.
Beaverson Neil
Wood Will
Borden Ladner Gervais Llp
Cellresin Technologies Llc
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