Fluoropolymer coated film, process for forming the same, and...

C - Chemistry – Metallurgy – 09 – D

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C09D 127/14 (2006.01) C08J 7/04 (2006.01) C09D 127/16 (2006.01)

Patent

CA 2680847

A process for forming a multilayer film includes coating a polymeric substrate film with a liquid fluoropolymer coating. The liquid fluoropolymer coating includes a fluoropolymer, solvent, a compatible cross-linkable adhesive polymer, and a cross-linking agent. The process further includes cross-linking the compatible cross-linkable adhesive polymer to form a cross-linked polymer network in the fluoropolymer coating, removing the solvent from the fluoropolymer coating, and adhering the fluoropolymer coating to the polymeric substrate film. A liquid fluoropolymer coating composition includes a fluoropolymer selected from homopolymers and copolymers of vinyl fluoride and homopolymers and copolymers of vinylidene fluoride, solvent, a compatible cross-linkable adhesive polymer, and a cross-linking agent. A fluoropolymer coated film includes a polymeric substrate film and a fluoropolymer coating on the polymeric substrate film. The fluoropolymer coating includes a fluoropolymer and a compatible cross-linked adhesive polymer.

L'invention concerne un procédé de fabrication d'un film multicouche qui comprend le revêtement d'un film de substrat polymère avec un revêtement fluoropolymère liquide. Le revêtement fluoropolymère liquide comprend un fluoropolymère, un solvant, un polymère adhésif pouvant être réticulé compatible et un agent de réticulation. Le procédé comprend en outre la réticulation du polymère adhésif pouvant être réticulé compatible pour former un réseau polymère réticulé dans le revêtement fluoropolymère, l'élimination du solvant du revêtement fluoropolymère et le collage du revêtement fluoropolymère au film de substrat polymère. Une composition liquide de revêtement fluoropolymère comprend un fluoropolymère choisi parmi les homopolymères et les copolymères de fluorure de vinyle ainsi que les homopolymères et copolymères de fluorure de vinylidène, un solvant, un polymère adhésif pouvant être réticulé compatible et un agent de réticulation. Un film revêtu de fluoropolymère comprend un film de substrat polymère et un revêtement fluoropolymère sur le film de substrat polymère. Le revêtement fluoropolymère comprend un fluoropolymère et un polymère adhésif réticulé compatible.

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