Flexible laminates bonded with water-based laminating ink...

B - Operations – Transporting – 32 – B

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B32B 7/12 (2006.01) B32B 15/08 (2006.01) B32B 23/08 (2006.01) B32B 27/16 (2006.01)

Patent

CA 2219938

This invention relates to improved flexible laminates formed from at least one corona treated polyolefin or polyester film bonded to another polymeric or cellulosic film via an aqueous based laminating adhesive. The improvement in the flexible laminates resides in the aqueous based laminating adhesive used to bond the respective films. The aqueous based laminating adhesive is comprised of an acrylic interpolymer prepared by emulsion polymerizing alkyl (meth)acrylates, .alpha.-.beta. unsaturated olefins, such as styrene and suitably substituted styrenes, and/or .alpha.-.beta. unsaturated nitriles, such as acrylonitrile with a glycidyl (meth)acrylate and having the pendent epoxy group converted to the hydroxy amine. The preferred pendant units are hydroxy propylamine groups.

La présente invention concerne des stratifiés flexibles améliorés formés à partir d'au moins un film de polyoléfine ou de polyester traité par l'effet couronne collé à un autre film polymérique ou cellulosique à l'aide d'un adhésif de complexage aqueux. L'amélioration du stratifié flexible réside dans l'adhésif de complexage aqueux utilisé pour joindre les films respectifs. L'adhésif de complexage aqueux est constitué d'un interpolymère d'acrylique préparé par polymérisation en émulsion de (méth)acrylates d'alkyle, d'oléfines insaturées en alpha-bêta, comme le styrène et des styrènes substitués de manière appropriée, et/ou des nitriles insaturés en alpha-bêta, comme l'acrylonitrile, avec un (méth)acrylate de glycidyle et dont le groupe époxy pendant est converti en hydroxyamine. Les groupes pendants préférés sont les groupes hydroxypropylamine.

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