Fluororesin-coated polymer film for reinforcing polymer...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 7/04 (2006.01) B32B 27/30 (2006.01) C08F 214/18 (2006.01) C08G 18/62 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2712660

Disclosed is a fluororesin-coated polymer film for reinforcing a polymer electrolyte membrane, wherein the fluororesin-coated polymer film is fabricated by forming on at least one side of a polymer film a coating of a reaction product of (A) a fluorine-containing copolymer composed of a fluoroolefin, a cyclohexyl group-containing acrylic ester, and a hydroxyl group-containing vinyl ether, and (B) a crosslinking agent having two or more isocyanate groups. The polymer film according to the present invention not only exhibits sufficiently high initial adhesion strength, with respect to the polymer electrolyte membrane, but also retains thereafter high adhesion strength in actual operating environments.

Cette invention concerne un film polymère recouvert de résine fluorée pour le renforcement de membranes d'électrolyte polymère, qui est obtenu en formant, au moins d'un côté d'un film polymère, un revêtement d'un produit de réaction d'un copolymère fluoré (A), qui contient une fluorooléfine, un acrylate à groupe cyclohexyle et un éther vinylique à groupe hydroxyle comme composants constitutifs, et d'un agent de réticulation (B) contenant deux groupes isocyanate ou plus. Le film polymère recouvert de résine fluorée présente une force d'adhésion initiale suffisamment élevée aux membranes d'électrolyte polymère, et conserve une force d'adhésion suffisamment élevée lors de son utilisation.

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