Photographic materials and processes comprising...

Details Photographic materials and processes comprising... Photographic materials and processes comprising...

G - Physics

03

C

96/174, 96/219

G03C 5/40 (2006.01) C07D 471/04 (2006.01) G03C 1/73 (2006.01)

Patent

CA 1168914

-0- PHOTOGRAPHIC MATERIALS AND PROCESSES COMPRISING OXOINDOLIZINE AND OXOINDOLIZINIUM COMPOUNDS Abstract of the Disclosure Oxoindolizine and oxoindolizinium dyes are useful in photographic materials and processes as image dyes. These dyes are formed in unexposed areas of photographic materials, especially photo- thermographic materials, by the reaction of a photo- sensitive cyclopropenone with a pyridine compound. Oxoindolizine and oxoindolizinium dyes are alterna- tively formed by 1) reaction of a photosensitive cyclopropenone with a pyridine compound and 2) reaction of the resulting product with a color form- ing coupler. The photographic material is imagewise exposed and then heated to a processing temperature to form a dye image. Alternatively, the oxoindoli- zine and oxoindolizinium dyes are produced by imbib- ing at least one of the reactants into the photo- graphic material comprising a photosensitive cyclopropenone.

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