Barrier coatings using polyacids

Details Barrier coatings using polyacids Barrier coatings using polyacids

C - Chemistry, Metallurgy

09

D

C09D 5/00 (2006.01) B05D 5/00 (2006.01) B32B 27/08 (2006.01) C08F 8/42 (2006.01) C08J 7/04 (2006.01) C08J 7/06 (2006.01) C09D 151/00 (2006.01) C09D 183/06 (2006.01) C09D 183/08 (2006.01) C09J 4/06 (2006.01)

Patent

CA 2401395

A process for treating a surface of a substrate to improve the oxygen, carbon dioxide, flavor and odor gas barrier properties of the substrate with an organic acid having at least two acid substituents selected from the group consisting of a polybasic carboxylic acid, a polymer of an unsaturated carboxylic acid and a co-polymer of an unsaturated carboxylic acid, by applying the acid on to the substrate to form a layer, and exposing the layer to moisture. A variety of other types of additives may be included in the coating applied to the substrate with the acid including compounds of the formula RaX3-aSi(CH2)nY, a condensation catalyst, a solvent, and/or a filler.

L'invention concerne un procédé de traitement d'une surface d'un substrat, de sorte que les propriétés d'isolement contre les gaz odorants et aromatisants, le dioxyde de carbone et l'oxygène, dudit substrat, soient améliorées à l'aide d'un acide organique possédant au moins deux substituants acides choisis dans le groupe constitué d'un acide carboxylique polybasique, d'un polymère d'un acide carboxylique insaturé et d'un copolymère d'un acide carboxylique insaturé. Ledit procédé consiste à appliquer de l'acide sur le substrat, de sorte qu'une couche soit formée, et à exposer la couche à l'humidité. Une grande variété d'autres additifs peut être incorporée au revêtement appliqué sur le substrat, l'acide contenant des composés de formule R¿a?X¿3-a?Si(CH¿2?)¿n?Y, un catalyseur de condensation, un solvant et/ou une charge.

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