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 2482749

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 enductions prévues pour conférer à des structures polymères un revêtement supérieur qui améliore les propriétés de protection contre les gaz de la structure. En même temps, ces enductions améliorent la résistance à l'eau de ce revêtement supérieur tout en améliorant l'adhérence du revêtement supérieur à la couche sous-jacente de la structure. Ces compositions de revêtement supérieur comprennent un matériau formant barrière contre les gaz en association avec un additif d'époxy qui améliore la résistance à l'eau, l'adhérence, la protection contre les gaz ou une combinaison de ces derniers paramètres, du revêtement supérieur formant protection. L'invention concerne aussi des structures à multiples couches qui présentent ce revêtement supérieur, en particulier, sous forme de conteneurs pour l'emballage de boissons et d'aliments.

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