Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
1999-11-03
2001-01-30
Kumar, Shailendra (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S120000, C560S170000, C560S312000, C560S315000, C562S621000, C562S622000, C544S162000, C546S205000, C548S469000, C548S503000, C548S510000, C548S530000, C548S539000, C548S571000, C558S428000
Reexamination Certificate
active
06180818
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a light-sensitive silver halide photographic material, more specifically, the present invention relates to a photographic material less changeable in the photographic capability after storage and less changeable in the photographic capability after photographing until development processing.
Further, the present invention relates to a silver halide photographic material causing less generation of fog.
Furthermore, the present invention relates to a novel hydroxamic acid-base compound capable of providing photographically useful effects.
BACKGROUND OF THE INVENTION
Silver halide photographic materials are not only demanded to have high sensitivity but also be less changeable in the photographic capability during storage after the preparation of the photographic material and also less changeable in the photographic capability after photographing until development processing.
Out of changes in the photographic capability after photographing until development processing, with respect to the prevention of latensification, JP-A-59-162546 (the term “JP-A” as used herein means an “unexamined published Japanese patent application”) discloses a method of using a hardening agent having an active vinyl group in combination with a triazine-base compound.
However, the above-described method is insufficient in the prevention effect and a further improvement has been demanded.
On the other hand, full color photographic materials use a plurality of emulsions different in the spectral sensitivity as a superposed layer structure, thereby achieving the object of full color photograph. The emulsions used therein have been fairly improved, however, they are still unsatisfactory because fogging of the latent image or intensification/regression is caused. In order to improve storability of the emulsion, for example, 2-hydroxamino-1,3,5-triazines are effective. However, the layers are different in the storability from each other depending upon the emulsion used therein. Accordingly, in recent years, it is being rather strongly demanded to improve storability of a latent image of a specific emulsion layer.
Many of known 2-hydroxylamine-1,3,5-triazines diffuse and act on the emulsion in the layer other than the objective layer and as a result, the balance in the gradation among respective layers is lost. Further, hydroxamic acids having a specific structure described in U.S. Pat. Nos. 4,339,515 and 4,330,606, JP-A-59-198453 and JP-A-3-293666 are used to improve storability of a color image or as a nucleophilic agent and different from the present invention in the use object. Moreover, the above-described hydroxamic acids are insufficient in causing action only on an emulsion in a specific layer. Accordingly, a method for greatly improving the storability of a latent image only in the objective layer has been keenly demanded.
The present invention provides a method for improving storability of an emulsion in a specific layer and stability of a latent image.
In order to overcome the above-described problems, the present inventors have made extensive investigations on the method for improving storability of an emulsion produced and storability of a latent image, in particular, on the structure of compounds, and as a result, they have found a novel hydroxamic acid-base compound having a specific structure for use in the present invention.
The compound for use in the present invention is found, when added to a silver halide photographic material, able to achieve the objects of the present invention without changing the hue of the dye formed, affecting the dye formation speed of couplers, accelerating the decomposition of the coupler or the dye formed, deteriorating the layer strength or fogging the emulsion.
Out of the compounds for use in the present invention, the compounds represented by formulae (IVA), (IVB), (VA) and (VB) are completely novel compounds which have not known in the past. These compounds are first found to be photographically useful after investigations by the present inventors.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide a compound highly effective in improving the storability of a silver halide emulsion and storability of a latent image.
A second object of the present invention is to provide a method for improving storability of a latent image using the above-described compound.
A third object of the present invention is to provide a compound capable of improving storability only of a latent image in a specific layer.
A fourth object of the present invention is to provide a method for improving storability of a latent image using the above-described compound.
A fifth object of the present invention is to provide a compound capable of, when added, improving storability of a latent image without adversely affecting various photographic properties.
A sixth object of the present invention is to provide a method for improving storability of a latent image using the above-described compound.
The objects of the present invention have been achieved by the following materials and compounds:
(1) a silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein said silver halide photographic material contains a compound represented by formula (IA):
wherein R
1a
represents a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to 20 carbon atoms or a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms;
R
2a
represents an alkenyl group having a total carbon number of 4 or more or a cycloalkenyl group having a total carbon atom number of 6 or more;
provided that when R
2a
is a styryl group, R
1a
is a substituted or unsubstituted alkyl group having from 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to 20 carbon atoms or a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms; and
when R
2a
is an alkenyl group having a total carbon number of 17 or more, R
1a
is a hydrogen atom, a substituted or unsubstituted alkyl group having 7 or more carbon atoms, a substituted or unsubstituted alkenyl group having 7 or more carbon atoms or a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms;
(2) a silver halide photographic material as described in item (1), wherein the compound represented by formula (IA) has a structure represented by formula (IIA) or (IIIA):
wherein in formula (IIA), R
1a
represents a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 20 carbon atoms or a substituted or unsubstituted alkenyl group having from 2 to 20 carbon atoms;
Q
1a
represents an atomic group necessary for forming a cycloalkenyl group by combining with the carbon atoms at both terminals;
R
3a
and R
4a
, which may be the same or different, each represents an alkyl group having from 1 to 22 carbon atoms, an aryl group having from 6 to 20 carbon atoms, an alkenyl group having from 3 to 22 carbon atoms, a carboxyl group, a cyano group, an acyl group having from 2 to 20 carbon atoms, an aminocarbonyl group having from 1 to 37 carbon atoms, an alkoxycarbonyl group having from 2 to 20 carbon atoms, an aryloxycarbonyl group having from 7 to 20 carbon atoms or a heterocyclic group having from 3 to 20 carbon atoms;
R
a
represents an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkenyl group, a carboxyl group, a cyano group, a sulfamoyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an aminocarbonylamino group, a sulfamoylamino group, an amino group, a heterocyclic oxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, a heterocyclic group, an alkylsulfonyl group or an arylsulfonyl group; and
na represents 0 or a positive i
Hosokawa Junichiro
Ishii Yoshio
Mihayashi Keiji
Mikoshiba Hisashi
Morigaki Masakazu
Fuji Photo Film Co. , Ltd.
Kumar Shailendra
Sughrue Mion Zinn Macpeak & Seas, PLLC
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