Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Reexamination Certificate
2002-09-23
2004-12-07
Letscher, Geraldine (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
C430S552000, C430S553000, C430S570000, C430S590000, C430S577000, C430S578000, C430S579000, C430S581000, C430S582000, C430S583000, C430S584000, C430S585000, C430S586000, C430S587000, C430S588000, C430S589000
Reexamination Certificate
active
06828087
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a silver halide photographic material, and particularly to a silver halide photographic material having high sensitivity, decreased residual colors after processing and minor fluctuations in photographic characteristics after continuous processing.
BACKGROUND OF THE INVENTION
Much effort has hitherto been made to enhance sensitivity of silver halide photographic materials and to decrease residual colors after processing. It has been known that sensitizing dyes used for spectral sensitization greatly affect properties of the silver halide photographic materials. In the sensitizing dyes, the slight difference in structure greatly affects the photographic properties such as sensitivity, fog, storage stability and residual coloration (residual colors), and the use of two or more of the sensitizing dyes in combination also greatly affects the photographic properties. However, it is difficult to predict its effect beforehand. Accordingly, many researchers have hitherto made effort to synthesize many sensitizing dyes and to study the use of many sensitizing dyes in combination, thereby examining their photographic properties. However, it is still impossible to predict the photographic properties in the present circumstances. For the above-mentioned reason, a technique for spectrally sensitizing the silver halide photographic materials at high sensitivity without adverse effects such as fog and residual colors has been desired.
When it is desired that the absorption maximum of the sensitizing dye is shifted to the long wavelength side, a naphthazole nucleus has hitherto been widely used in which a benzene ring is further condensed with a benzazole nucleus. However, a recent strong demand toward enhancement in sensitivity increases the amount of the dye added, while a reduction in a processing waste solution for complying with rapid photographic processing and environmental problems must be complied with. A highly hydrophobic dye such as the naphthazole nucleus-containing dye becomes difficult to meet such demands.
In Japanese Patent Application No. 124612/2000 (corresponding to U.S. Patent Application Publication No. 2002/0058216A1), the present inventors have disclosed that a sensitizing dye in which an azole nucleus having a specific heterocycle condensed is used in place of a naphthazole nucleus is higher in sensitivity and more decreased in residual colors than a naphthazole dye. However, such a dye is much accumulated in a processing solution after processing in principle, so that the problem has become clear that a fatigued processing solution is liable to fluctuate the photographic properties.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a silver halide photographic material having high sensitivity, decreased residual colors after processing and minor fluctuations in photographic characteristics after continuous processing.
As a result of intensive investigation, the object of the present invention has been able to be attained by the following:
(1) A silver halide photographic material comprising at least one methine dye represented by the following general formula (I) and at least one coupler represented by the following general formula (X):
wherein X
1
and X
2
each represents an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, a nitrogen atom or a carbon atom; Y
1
represents a furan, pyrrole or thiophene ring which may be condensed with another 5- or 6-membered carbon ring or heterocycle or may have a substituent group; Y
2
represents an atomic group necessary for forming a benzene ring or a 5- or 6-membered unsaturated heterocycle, which may be further condensed with another 5- or 6-membered carbon ring or heterocycle or may have a substituent group; a bond between two carbon atoms by which Y
1
and Y
2
are each condensed with the carbon ring or the heterocycle may be a single bond or a double bond; R
1
and R
2
each represents a substituted or unsubstituted alkyl, aryl or heterocyclic group; L
1
, L
2
and L
3
each represents a methine group; n
1
represents 0 or 1; M
1
represents a counter ion; and m
1
represents a number of 0 or more necessary for neutralizing a charge in a molecule;
wherein Z
1
and Z
2
each represents —C(Q3)═ or —N═; Q
1
and Q
3
each represents a hydrogen atom or a monovalent substituent group; Q
2
represents a hydrogen atom or a coupling release group; and Q
1
, Q
2
or Q
3
may be a divalent group, and combine with a multimer, a dimer or more, or a polymer chain to form a homopolymer or a copolymer;
(2) A silver halide photographic material comprising a support having provided thereon at least one silver halide photographic emulsion layer, which contains at least one methine dye represented by the above-mentioned general formula (I) and at least one coupler represented by the following general formula (XX):
wherein Q
5
represents a substituted or unsubstituted aryl group; Q
6
represents a substituted or unsubstituted alkyl group; Q
7
represents a hydrogen atom, a halogen atom, an alkoxyl group or an alkyl group; and X represents a hydrogen atom or a group to be released by a reaction with an oxidant of a developing agent;
(3) The silver halide photographic material described in the above (1) or (2), wherein the methine dye represented by the above-mentioned general formula (I) in (1) or (2) is represented by the following general formula (II), (III), (IV) or (V):
wherein Y
11
represents an oxygen atom, a sulfur atom or N—R
13
, wherein R
13
represents a hydrogen atom or an alkyl group; V
15
and V
16
each represents a hydrogen atom or a monovalent substituent group; X
11
and X
12
each represents an oxygen atom or a sulfur atom; R
11
and R
12
each represents an alkyl group substituted by an acid group; V
11
, V
12
, V
13
and V
14
each represents a hydrogen atom or a monovalent substituent group; M
11
represents a counter ion; and m
11
represents a number of 0 or more necessary for neutralizing a charge in a molecule;
wherein Y
21
represents an oxygen atom, a sulfur atom or N—R
23
wherein R
23
represents a hydrogen atom or an alkyl group; V
25
and V
26
each represents a hydrogen atom or a monovalent substituent group; X
21
and X
22
each represents an oxygen atom or a sulfur atom; R
21
and R
22
each represents an alkyl group substituted by an acid group; V
21
, V
22
, V
23
and V
24
each represents a hydrogen atom or a monovalent substituent group; M
21
represents a counter ion; and m
21
represents a number of 0 or more necessary for neutralizing a charge in a molecule;
wherein Y
31
represents an oxygen atom, a sulfur atom or N—R
33
, wherein R
33
represents a hydrogen atom or an alkyl group; V
35
and V
36
each represents a hydrogen atom or a monovalent substituent group; X
31
and X
32
each represents an oxygen atom or a sulfur atom; R
31
and R
32
each represents an alkyl group substituted by an acid group; A
31
represents a methyl group, an ethyl group or a propyl group; V
31
, V
32
, V
33
and V
34
each represents a hydrogen atom or a monovalent substituent group; M
31
represents a counter ion; and m
31
represents a number of 0 or more necessary for neutralizing a charge in a molecule;
wherein Y
41
represents an oxygen atom, a sulfur atom or N—R
43
, wherein R
43
represents a hydrogen atom or an alkyl group; V
45
and V
46
each represents a hydrogen atom or a monovalent substituent group; X
41
and X
42
each represents an oxygen atom or a sulfur atom; R
41
and R
42
each represents an alkyl group substituted by an acid group; A
41
represents a methyl group, an ethyl group or a propyl group; V
41
, V
42
, V
43
and V
44
each represents a hydrogen atom or a monovalent substituent group; M
41
represents a counter ion; and m
41
represents a number of 0 or more necessary for neutralizing a charge in a molecule;
(4) The silver halide photographic material described in the above (3), wherein one of R
11
and R
12
of the methine dye represented
Fuji Photo Film Co. , Ltd.
Letscher Geraldine
Sughrue & Mion, PLLC
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