Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1991-02-25

1992-05-26

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430219, 430222, 430223, 430226, 430443, 430517, 430519, 430543, 430544, 430551, 430559, 430562, 430564, 430566, 430598, 430611, 430613, 430631, 430955, 430957, 430958, 430959, G03C 106, G03C 134, G03C 142, G03C 732

Patent

active

051167174

ABSTRACT:
A silver halide photographic material composed of a support having thereon at least one silver halide photosensitive emulsion layer, at least one layer of the material containing a blocked photographic reagent precursor represented by formula (I): ##STR1## wherein X.sub.1 represents a divalent linking group containing a hetero atom bonded to the carbon atom, provided that X.sub.1 is linked to the carbon atom by a group other than ##STR2## PUG represents a photographically useful group containing a hetero atom bonded to X.sub.1 ; W represents .dbd.N-- or ##STR3## Y.sub.1 represents hydrogen or a group capable of being substituted; Z represents an atomic group necessary for forming a heterocyclic ring, provided that when W represents a ##STR4## the group adjacent to W in the heterocyclic ring is a group other than ##STR5## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represents hydrogen or or group capable of being substituted; and m is 0 or 1, with proviso that when m is 0, the photographically useful group represented by PUG is bonded to a carbon atom via heteroatom of PUG. The photographic materials have superior stability during storage, and are capable of releasing a photographic reagent with specifically required timing during processing, and in a wide pH range.

REFERENCES:
patent: 3615617 (1971-10-01), Muller-Bardorff et al.
patent: 4052213 (1977-10-01), Credner et al.
patent: 4499181 (1985-02-01), Watanabe et al.
patent: 4659651 (1987-04-01), Yagihara et al.
patent: 4728598 (1988-03-01), Bailey et al.
patent: 4729936 (1988-03-01), Kitaguchi et al.
patent: 4824772 (1989-04-01), Ichijima et al.
patent: 4857440 (1989-08-01), Begley et al.
patent: 4917995 (1990-04-01), Kojima et al.
Kestner et al., "Photographic elements and processes", Research Disclosure, No. 15157, Nov. 1976, pp. 68-74.

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