Coating composition containing an epoxide additive and...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 7/00 (2006.01) B65D 23/08 (2006.01) C08J 7/04 (2006.01) C08J 9/20 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2482600

Coatings are provided to give polymeric structures a top coat that improves the gas barrier properties of the structure while enhancing the water resistance of the top coating and while improving the adhesion of the top coat to an underlying layer of the structure. These top coat compositions comprise an organic barrier coating material in combination with an epoxide additive which enhances the water resistance, adhesion, gas barrier, or a combination thereof, of the top coat barrier layer. Multilayer structures having this top coat are also provided, particularly in the form of containers for food and beverage packaging.

L'invention concerne des revêtements servant de couche supérieure à des structures polymériques, et améliorant les propriétés de perméabilité au gaz de la structure tout en améliorant la résistance à l'eau de la couche supérieure, ainsi que l'adhérence de la couche supérieure à une couche sous-jacente de la structure. Ces compositions de revêtement supérieures comprennent un matériau de revêtement perméable organique combiné à un additif époxyde, augmentant la résistance à l'eau, l'adhérence, l'imperméabilité au gaz, ou une combinaison de ces éléments, de la couche de revêtement supérieure. L'invention concerne également des structures à couches multiples pourvues de cette couche supérieure, en particulier sous forme de récipients d'emballage d'aliments et de boissons.

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