Overcoated radiation image storage panel and method for preparing radiation image storage panel
AssigneeEastman Kodak Company
InventorLuther C. Roberts
Life of this patent
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Abstract
A radiographic phosphor panel which has a support, a luminescent layer overlaying the support, and an overcoat layer overlaying the luminescent layer. The luminescent layer includes phosphor crystals. The overcoat layer is a miscible blend of poly(vinylidene fluoride-co-tetrafluoroethylene) and poly((1 to 2 carbon alkyl)methacrylate).
Claims19
A radiographic phosphor panel comprising a support, a luminescent layer overlaying said support, and an overcoat layer overlaying said luminescent layer, said luminescent layer including phosphor crystals, said luminescent layer being subject to iodine-associated yellowing, said overcoat layer being a miscible blend of poly(vinylidene fluoride-co-tetrafluoroethylene) and second polymer selected from the group consisting of poly(methylmethacrylate) and poly(ethylmethacrylate), said poly(vinylidene fluoride-co-tetrafluoroethylene) and said second polymer having a ratio in parts by weight of from 70:30 to 10:90.
The radiographic phosphor panel of claim wherein said phosphor is selected from the group consisting of divalent alkaline earth metal fluorohalide phosphors containing iodine and alkali metal halide phosphors containing iodine.
A storage phosphor panel comprising, in order:
- a support;
- a fluorescent layer including phosphor crystals capable of absorbing X-radiation and emitting longer wavelength electromagnetic radiation in response to stimulating radiation of a third wavelength, said phosphor including iodine and other halogen, said fluorescent layer being subject to yellowing upon exposure to ambient atmosphere;
- and an overcoat layer, said overcoat layer being a miscible blend of poly(vinylidene fluoride-co-tetrafluoroethylene) and a second polymer selected from the group consisting of poly(methylmethacrylate) and poly(ethylmethacrylate), said poly(vinylidene fluoride-co-tetrafluoroethylene) and said second polymer having a ratio in parts by weight of from 70:30 to 10:90.
A method for preparing a radiographic phosphor panel comprising forming a luminescent layer on a support, making a solution of poly(vinylidene fluoride-co-tetrafluoroethylene) and a second polymer selected from the group consisting of poly(methylmethacrylate) and poly(ethylmethacrylate), and said poly(vinylidene fluoride-co-tetrafluoroethylene) said second polymer having a ratio in parts by weight of from 70:30 to 10:90, and coating said solution over said luminescent layer.
Dependencies are inferred from the claim text.