Radiation imagery chemistry: process – composition – or product th – Regenerating image processing composition
Patent
1992-01-02
1993-06-15
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Regenerating image processing composition
430400, 252184, 4283044, 428696, G03C 5395
Patent
active
052197174
ABSTRACT:
The invention is accomplished by providing an iodide ion absorbing method and article. The article is a composite article comprising a surfactant, an iodide absorbing medium, and a polymer that is permeable to iodide ion overlaying the iodide absorbing medium. In a preferred embodiment of the invention the polymer is an ionic polymer and the surfactant is an ionic surfactant with a charge opposite to that of the polymer. The surfactant can be incorporated in the absorbing medium, in the polymer, or it can overlay the polymer. In a preferred form of the invention, a substrate is coated with the iodide absorbing medium, a layer of an ionic polymer is overlaid on the absorbing medium, and a layer incorporating an ionic surfactant is overlaid onto the polymer. The ionic surfactant also may be placed in a layer between the polymer and the absorbing medium. A preferred absorbing medium is silver bromide. Preferred polymers are copolymers of methacrylate, methacrylamide, acrylate, or acrylamide monomers in which at least one monomer is cationic and the others are nonionic. Preferred surfactants are anionic surfactants, in particular, a mixture of sodium di- and tri-isopropylnaphthalenesulfonates sold commercially as Alkanol.RTM. XC, and a sodium sulfosuccinate diester sold commercially as Aerosol.RTM. OT.
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William D. Fairman & Jacob Sedlet, Analytical Chemistry, vol. 38, No. 9, Aug. 1966 pp. 1171-1175.
Hastreiter, Jr. Jacob J.
Pearce Glenn T.
Roberts Michael R.
Schmittou Eric R.
Bowers Jr. Charles L.
Eastman Kodak Company
Huff Mark F.
Leipold Paul A.
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