Photographic materials and processes comprising oxoindolizine an

Details Photographic materials and processes comprising oxoindolizine an Photographic materials and processes comprising oxoindolizine an

1981-06-29

1983-01-11

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Nonsilver image

430344, 430336, 430340, 546121, 542437, 542443, G03C 152

Patent

active

043682472

ABSTRACT:
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 photothermographic materials, by the reaction of a photosensitive cyclopropenone with a pyridine compound. Oxoindolizine and oxoindolizinium dyes are alternatively formed by (1) reaction of a photosensitive cyclopropenone with a pyridine compound and (2) reaction of the resulting product with a color forming coupler. The photographic material is imagewise exposed and then heated to a processing temperature to form a dye image. Alternatively, the oxoindolizine and oxoindolizinium dyes are produced by imbibing at least one of the reactants into the photographic material comprising a photosensitive cyclopropenone.

REFERENCES:
patent: 4106938 (1978-08-01), Fletcher et al.
patent: 4128422 (1978-12-01), Fletcher et al.
J. W. Lown et al., "Reaction of Cyclopropenones . . . ," Canadian Jour. of Chem., vol. 49, (1971), pp. 1165-1175.
T. Eicher et al., "Zur Reaktion von Cyclopropenonen mit . . . ", Tetrahedron Letters, No. 14, (1979), pp. 1213-1216.
Research Disclosure, Apr., 1979, Item No. 18016.
Research Disclosure, Jun. 1978, Item No. 17029.
C. Holstead et al., "Some Photothermographic Systems", The Journ. of Photo Science, vol. 25, No. 6, Nov./Dec., 1977, pp. 241-245.

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