Silver halide material with photographic agent blocked by nucleo

Details Silver halide material with photographic agent blocked by nucleo Silver halide material with photographic agent blocked by nucleo

1984-05-25

1985-11-19

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430222, 430223, 430559, 430561, 430563, 430566, 430607, 430611, 430598, 430614, 430955, 430957, 430959, 430960, G03C 140, G03C 134, G03C 142, G03C 110

Patent

active

045542430

ABSTRACT:
A silver halide photographic light-sensitive material is described which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material therein contains a blocked photographic agent capable of releasing a photographically useful agent and the blocked photographic agent has a carbonyl group or thiocarbonyl group to which a hydrogen atom or a carbon atom is directly bonded and is substituted with a photographically useful group which is capable of being released upon an intramolecular nucleophilic attack by the oxygen atom in the carbonyl group or the sulfur atom in the thiocarbonyl group.
The precursor of photographic agent is completely stable during storage prior to use of the photographic light-sensitive material, and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material. The precursor also exhibits its function to a substantial degree in a relatively low pH range. A method of forming an image using the silver halide photographic light-sensitive material is also described.

REFERENCES:
patent: 3980479 (1976-09-01), Fields et al.
patent: 4139379 (1979-02-01), Chasman et al.
patent: 4358525 (1982-11-01), Mooberry et al.
patent: 4468450 (1984-08-01), Meneghini et al.
patent: 4468451 (1984-08-01), Foley

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