System consisting of two UV-curing dry-transfer coating layers for the protection of a hologram in a photopolymer film composite
AssigneeCovestro Deutschland AG
InventorsSerguei Kostromine, Thomas Rölle, Thomas Fäcke, Karl Vetterle
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Abstract
The invention relates to a scaled holographic medium comprising a layer construction B′-C1′-C2′, to a process for producing the sealed holographic medium, to a kit of parts, to a layer construction comprising a protective layer and a substrate layer and to the use thereof.
Claims14
A sealed holographic medium comprising a layer construction B′-C1′-C2′, wherein B′ is a photopolymer layer containing a volume hologram, C1′ is a protective layer at least partly cured by actinic radiation obtained by reaction of
- I) at least one thermoplastic mainly linear and semicrystalline polyurethane resin C1-I,
- II) at least one multifunctional acrylate reactive diluent C1-II, and
- III) at least one photoinitiator C1-III
- and
- C2′ is a protective layer at least partly cured by actinic radiation obtainable by reaction of
- I) at least one thermoplastic resin C2-I selected from the group consisting of polyvinyl butyral and polymethyl methacrylate,
- II) at least one multifunctional acrylate reactive diluent C2-II, and
- III) at least one photoinitiator C2-III.
A layer construction comprising a curable protective layer C1 and an areal substrate layer D1 at least partly joined to the protective layer C1, wherein the protective layer C1 comprises
- I) at least one thermoplastic mainly linear and semicrystalline polyurethane resin C1-I,
- II) at least one multifunctional acrylate reactive diluent C1-II, and
- III) at least one photoinitiator C1-III.
A kit of parts containing at least one uncured protective layer C 1, at least one uncured protective layer C2 and an areal photopolymer layer B′ containing a volume hologram, wherein the protective layers C1 and C2 are different.
Dependencies are inferred from the claim text.