C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 129/04 (2006.01) B32B 27/32 (2006.01)
Patent
CA 2205265
Coating compositions which have improved oxygen and flavor/odor barrier characteristics are disclosed. The coating compositions are obtained by coating a hydrophobic polymeric substrate, such as a polyolefin film, with an aqueous solution of polyvinyl alcohol and urea and drying the coating at a temperature sufficient to allow the polyvinyl alcohol and urea to crosslink such that urethane linkages are formed at least between the polymeric substrate and the coating composition.
Compositions de revêtement ayant des caractéristiques d'arrêt améliorées par rapport à l'oxygène, aux saveurs et aux odeurs. On obtient ces compositions en recouvrant un substrat polymère hydrophobe, tel qu'un film polyoléfinique, d'une solution aqueuse d'alcool polyvinylique et d'urée et en séchant ce revêtement à une température suffisamment élevée pour permettre la réticulation de l'alcool polyvinylique et de l'urée, de façon à former des combinaisons d'uréthane au moins entre le substrat polymère et la composition de revêtement.
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
LandOfFree
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