Hydrazide redox-dye-releasing compounds for photothermographic elements

Hydrazide redox-dye-releasing compounds for photothermographic elements

A photothermographic element comprises a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising: (a) a photosensitive silver halide; (b) a non-photosensitive, reducible source of silver; (c) a reducing agent for the non-photosensitiv...

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Bibliographische Detailangaben
Hauptverfasser: LYNCH, DOREEN C, NAIRNE, ROBERT J.D, MOONEY, JUSTINE A, MOTT, ANDREW W, BAYS, DAVID C, LANDGREBE, KEVEN D, POON, STEPHEN S.C, SIMPSON, SHARON M, GRIEVE, DUNCAN M.A, STIBBARD, JOHN H.A
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AUXILIARY PROCESSES IN PHOTOGRAPHY
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
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Beschreibung
Zusammenfassung:A photothermographic element comprises a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising: (a) a photosensitive silver halide; (b) a non-photosensitive, reducible source of silver; (c) a reducing agent for the non-photosensitive, reducible silver source; and (d) a binder. The reducing agent comprises a hydrazide redox-dye-releasing cpd. of the general formulae: R1-(C(O)-NH-NH-SO2-X-D)n (I) or (D-X-C(O)-NH-NH-SO2)n-R2 (II) where D = a chromophore of a thermally mobile dye; X = a single bond or divalent linking gp.; R1 and R2 = an organic gp.; and n = 1 or more. Image prodn. using the element is also claimed.