In-mold primer coating for thermoplastic substrates

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 4/06 (2006.01) B29C 37/00 (2006.01) B32B 7/02 (2006.01) C08F 246/00 (2006.01) C08F 283/10 (2006.01) C08F 290/06 (2006.01) C08J 5/00 (2006.01) C08J 7/04 (2006.01) C09D 133/06 (2006.01) C09D 163/10 (2006.01) B29C 45/16 (2006.01)

Patent

CA 2487510

An in-mold primer coating adapted to be applied in-mold to a thermoplastic substrate and heat cured to form a thermoset surface coating on the molded substrate. The in-mold primer coating comprises a coreactive polymerizable composition comprising an epoxy-acrylate oligomer having a molecular weight from about 350 to about 2500, a hydroxyl functional acrylate or methacrylate, a vinyl aromatic monomer such as styrene, and a small amount of acrylic or methacrylic acid, with the balance being other diacrylate and/or other ethylenically unsaturated monomer(s), if any.

L'invention concerne une couche primaire conçue pour être appliquée dans le moule sur un substrat thermoplastique, et pour être polymérisée par cuisson de manière à former une couche de surface thermopolymérisée sur le substrat moulé. Cette couche primaire appliquée dans le moule comprend une composition polymérisable coréactive contenant un oligomère époxy-acrylate présentant une masse moléculaire comprise entre 350 et 2 500 environ, un acrylate ou méthacrylate à fonction hydroxyle, un monomère de vinyle aromatique tel que le styrène, et une faible quantité d'acide acrylique ou méthacrylique, le reste étant composé le cas échéant par un ou plusieurs autres monomères diacrylate et/ou monomères insaturés en éthylène.

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