EP0130856A2
Expired / Lapsed
EP
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Radiation sensitive silver halide emulsion containing substituted arylhydrazides
Assignee: Eastman Kodak Co
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Filing: 1984-05-11
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Granted: —
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Expires: 2004-05-11
Abstract
Abstract The use of sulfinic acid radical substituted uniformly available arylhydrazides in producing images in silver halide photographic elements is disclosed. The sulfinic acid radical substituted uniformly available arylhydrazide can be incorporated in photographic silver halide emulsions and photographic elements. The sulfinic acid radical substituent is capable of activating the uniformly available arylhydrazides, particularly for use at a lower alkaline pH. In oegative working surface latent image forming emulsions the sulfinic acid radical substituted uniformly available arylhydrazides permit higher speed or contrast to be achieved. In direct positive internal latent image forming emulsions increased nucleation activity and reduced rereversal can be achieved.
Inventors
- 👤 Thomas Carrol Hess
- 👤 Karl Eugene Wiegers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 05:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48538; G03C1/48546; G03C1/48561; G03C1/06; G03C1/061
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
48 words
A radiation sensitive silver halide emulsion containing a uniformly available arylhydrazide comprised of an acyl group linked directly to a ring carbon atom of an aryl group by a hydrazo moiety characterized in that one of the nitrogen atoms of said hydrazo moiety is sulfinic acid radical substituted.
Claim 2
Dependent Claim
48 words
A radiation sensitive silver halide emulsion containing a uniformly available arylhydrazide comprised of an acyl group linked directly to a ring carbon atom of an aryl group by a hydrazo moiety characterized in that one of the nitrogen atoms of said hydrazo moiety is sulfinic acid radical substituted.
Claim 3
Dependent Claim
56 words
A radiation sensitive silver halide emulsion according to claim 1 in which said hydrazo moiety is of the following formula: wherein R 1 is hydrogen or a sulfinic acid radical substitutent and R 2 is a sulfinic acid radical substituent when R 1 is hydrogen and hydrogen when R 1 is a sulfinic acid radical substituent.
Claim 4
Dependent Claim
21 words
A radiation sensitive silver halide emulsion according to claim 2 further characterized in containing surface latent image forming silver halide grains.
Claim 5
Dependent Claim
21 words
A radiation sensitive silver halide emulsion according to claim 2 further characterized in containing internal latent image forming silver halide grains.
Claim 6
Dependent Claim
31 words
A radiation sensitive silver halide emulsion according to claim 1 further characterized in that said arylhydrazide is present in a concentration of up to 10- 2 mole per mole of silver.
Claim 7
Dependent Claim
30 words
A radiation sensitive silver halide emulsion according to claim 1 further characterized in that said sulfinic acid radical substituent is of the formula: where Ar 1 is an aryl group.
Claim 8
Dependent Claim
22 words
A radiation sensitive silver halide emulsion according to claim 6 further characterized in that said aryl group is a carbocyclic aromatic ring.
Claim 9
Dependent Claim
21 words
A radiation sensitive silver halide emulsion according to claim 7 further characterized in that said aryl group is a phenyl substituent.
Claim 10
Dependent Claim
20 words
A radiation sensitive silver halide emulsion according to claim 8 further characterized in that said phenyl substituent is alkyl substituted.
Claim 11
Dependent Claim
27 words
A radiation sensitive silver halide emulsion according to claim 1 further characterized in that said arylhydrazide includes a moiety for promoting adsorption to silver halide grain surfaces.
Claim 12
Dependent Claim
44 words
A radiation sensitive silver halide emulsion according to claim 1 further characterized in that said arylhydrazide is of the formula: wherein Acyl is an acyl group; Ar is an aryl group; R 1 is hydrogen; and R 2 is a sulfinic acid radical substituent.
Claim 13
Dependent Claim
28 words
A photographic element comprised of a radiation sensitive silver halide emulsion characterized in that said silver halide emulsion is according to any one of claims 1 through 11.
Claim 14
Dependent Claim
80 words
A photographic element according to claim 12 further characterized in being capable of producing a direct positive image and being comprised of a support and said emulsion is coated on said support and comprised of a dispersing medium, internal latent image forming silver halide grains, and up to 10- 2 mole per mole of silver of said uniformly available arylhydrazide capable of acting as a nucleating agent capable of selectively rendering unexposed silver halide grains developable in a surface developer.
Claim 15
Dependent Claim
46 words
A photographic element according to claim 13 further characteried in that said arylhydrazide includes a thioamide adsorption promoting moiety and is adsorbed to the surface of the said silver halide grains in a concentration of from 10 -5 to 10 -3 mole per mole of silver.
Claim 16
Dependent Claim
121 words
A photographic element according to claim 14 further characterized in that said aryl moiety of said arylhydrazide includes an adsorption promoting moiety of the formula: wherein one of X and X' represents -N(R S )- and the other represents -0-, -S-, or -N(R 6 )-; R 4 represents hydrogen, an aliphatic residue, an aromatic residue, or together with X or X' completes a heterocyclic ring; R 5 or R 6 in the X position represents hydrogen, an aliphatic residue, or an aromatic residue; and R 5 or R 6 in the X' position represents hydrogen or a benzyl substituent; provided that at least one of R 4 , R 5 , and R 6 must be hydrogen when each is present.
Claim 17
Dependent Claim
64 words
A photographic element according to claim 13 further characterized in that it forms a part of an image transfer film unit additionally comprising a dye image providing material capable of shifting between a mobile and an immobile form as a function of silver halide development and a receiving layer for providing a viewable transferred dye image following exposure and processing of said emulsion layer.
Claim 18
Dependent Claim
90 words
A photographic element according to claim 12 further characterized in that said silver halide emulsion layer is negative working and capable of producing a high contrast silver image as a consequence of being comprised of a dispersing medium and radiation sensitive silver halide grains capable of forming a surface latent image having a mean diameter of 0.7 µm or less, and in said emulsion layer or an adjacent hydrophilic colloid layer said uniformly avaialable arylhydrazide in a concentration of from 10 -4 to 10- 2 mole per mole of silver.
Claim 19
Dependent Claim
28 words
A photographic element according to claim 17 further characterized in that said dispersing medium is present in a concentration of 250 grams or less per mole of silver.
Claim 20
Dependent Claim
25 words
A photographic element according to claim 17 further characterized in that said photographic element contains a fog reducing and contrast enhancing amount of a benzotriazole.
Claim 21
Dependent Claim
75 words
A photographic element according to claim 12 further characterized in that said silver halide emulsion layer is negative working and capable of increased photographic speed as a consequence of being comprised of a dispersing medium, surface latent image forming silver halide grains, and adsorbed to the surfaces of silver halide grains from 10 -7 to 10- 2 of an said arylhydrazide comprised of a thioamide adsorption promoting moiety as a substituent of said aryl moiety.
Claim 22
Dependent Claim
22 words
A negative working silver halide photographic element according to claim 20 further characterized in that said silver halide grains are gold sensitized.
Claim 23
Dependent Claim
23 words
A negative working silver halide photographic element according to claim 21 further characterized in that said silver halide grains are additionally sulfur sensitized.
Claim 24
Dependent Claim
34 words
A negative working silver halide photographic element according to claim 20 further chracterized in that said arylhydrazide is present in a concentration of from 10- 6 to 10- 4 mole per mole of silver.
Claim 25
Dependent Claim
115 words
A negative working silver halide photographic element according to claim 20 further characterized in that said arylhydrazide is of the formula: wherein Acyl is an acyl group; D is phenylene; R 1 is hydrogen or a sulfinic acid radical substituent; R 2 is a sulfinic acid radical substituent when R 1 is hydrogen and hydrogen when R 1 is a sulfinic acid radical substituent; X is -0-, -S-, or -N(R 6 )-; and R 4 and R 6 are hydrogen, alkyl, haloalkyl, alkoxyalkyl, phenylalkyl, phenyl, naphthyl, alkylphenyl, cyanophenyl, halophenyl, or alkoxyphenyl, each alkyl moiety having up to about 18 carbon atoms, provided that no more than one of R 4 and R 6 are hydrogen.
References Cited (Backward Citations)
No citation records indexed.
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