低温ラミネート可能なPVC被覆鋼板用ポリエステル樹脂系接着剤の開発

概要

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A study was conducted on polyester adhesives that can be activated at lower temperatures for the production of polyvinyl chloride (PVC) coated steel sheet by film lamination. Functional groups -OH, COOH, tertiary-amine, epoxy, etc. -were introduced in modified polyester resins as branches, and the effect on PVC film adhesion of the resultant variations in equivalent and molecular weights were examined. The addition of curing agents and catalysts to the modified polyester resins was also investigated. It was found that modified polyester resins containing these functional groups as branches gave insufficient PVC film adhesion at lower lamination temperatures, and that the addition to the modified polyester of MDI-type blocked isocyanate and the phenolic amide of DBU brought about good PVC film adhesion at a lower temperature (1800°C).
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