Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
1999-03-30
2001-07-10
Chea, Thorl (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S503000, C430S507000, C430S607000, C430S613000
Reexamination Certificate
active
06258518
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a photosensitive material (to be also referred to as a “sensitive material” hereinafter) having raw stock stability and latent image stability improved by adding a specific novel organic compound without degrading the color generation properties.
Silver halide photosensitive materials are required to have high sensitivity and minimize variations in the photographic property depending on a storage period after the manufacture of the materials and before the materials are used in photographing and variations in the photographic property depending on a storage period from the time of photographing with the material to the time when the materials are developed. Note that the former property is called the raw stock stability of sensitive material and the latter property is called the latent image stability of sensitive material.
Also, full-color sensitive materials achieve full-color photographing by using a multi-layered arrangement including a plurality of emulsions different in spectral sensitivity. A full-color sensitive material is coated with a plurality of emulsions having different properties, and these emulsions are also different in raw stock stability and latent image stability. So, a technique which allows only a specific layer to achieve its effect is being strongly desired.
As a means for improving the raw stock stability and latent image stability of a photosensitive material and allowing only a specific sensitive layer to achieve its effect, a method of adding a hydroxamic acid derivative to a sensitive material is disclosed in Jpn. Pat. Appln. KOKAI Publication No. (hereafter referred to as JP-A-)8-314051 whose corresponding EP application is EP 750,225A. The present inventors evaluated the improving effect of compounds described in JP-A-8-314051 and found that the compounds were effective even under high-temperature, high-humidity conditions. However, these compounds did not show any specific improving effect under forced conditions at high oxygen partial pressure.
JP-A-9-61976, whose corresponding U.S. Patent is U.S. Pat. No. 5,667,959, has disclosed a method which reduces the residual amount of sensitizing dyes after development by adding a hydroxamic acid derivative to a sensitive material. The present inventors similarly evaluated the raw stock stability and latent image stability of compounds described in JP-A-9-61976 and found that these compounds were also not satisfactorily effective under forced conditions at high oxygen partial pressure. Additionally, it was found that the addition of these compounds to a sensitive material had an adverse effect on the color generation properties of couplers.
BRIEF SUMMARY OF THE INVENTION
Generally, it is highly unlikely that a customer intentionally stores a sensitive material in a high-oxygen partial pressure environment after purchasing it. However, sensitive materials are often kept loaded in cameras for long time periods before they are developed. The present inventors have found that oxygen adversely affects the raw stack stability and latent image stability of a sensitive material while the material is kept loaded in a camera for a long time period, and achieved the present invention. The present inventors have thought that the influence of oxygen on sensitivity materials during storage can be checked by evaluating the raw stock stability and latent image stability at high oxygen partial pressure. Note that JP-A-8-314051 and JP-A-9-61976 cited above do not describe any evaluations made by taking the influence of oxygen into consideration.
The present invention has been made in consideration of the above situation and has as its object to provide a photosensitive material which varies the photographic properties little and does not degrade the color generation properties even when stored.
DETAILED DESCRIPTION OF THE INVENTION
The above object is achieved by a silver halide photosensitive material characterized by containing a compound represented by formula (S1) below.
In formula (S1), R
1
represents a substituent group, n represents an integer from 0 to 4, R
2
and R
3
can be the same or different and represent a hydrogen atom or an alkyl group, and R
4
represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group.
Formula (S1) used in the silver halide photo-sensitive material of the present invention will be described in detail below.
In formula (S1), R
1
represents a halogen atom, an alkyl group, an aryl group, a heterocyclic group, a cyano group, a nitro group, a hydroxyl group, a carboxy group, a sulfo group, an alkoxy group, an aryloxy group, an acylamino group, an amino group, an alkylamino group, an anilino group, an ureido group, a sulfamoylamino group, an alkylthio group, an arylthio group, an alkoxycarbonylamino group, a sulfonamide group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an alkoxycarbonyl group, a heterocyclic oxy group, an azo group, an acyloxy group, a carbamoyloxy group, a silyl group, a silyloxy group, an aryloxycarbonylamino group, an imide group, a heterocyclic thio group, a sulfinyl group, a phosphonyl group, an aryloxycarbonyl group, and an acyl group. These substituent groups can also be substituted by an alkyl group, an alkenyl group, an alkinyl group, an aryl group, a hydroxyl group, a nitro group, a cyano group, a halogen atom, or a substituent group formed by oxygen, nitrogen, sulfur, or carbon atoms.
These examples of a substituent group represented by R
1
will be described in more detail below.
Examples of the halogen atom are a fluorine atom and a chlorine atom.
The alkyl group is a straight-chain, branched-chain, or cyclic alkyl group having the total number of carbon atoms of 1 to 40, preferably 1 to 22. Examples are methyl, ethyl, propyl, isopropyl, t-butyl, 2-hydroxyethyl, 3-hydroxypropyl, benzyl, 2-methanesulfonamidoethyl, 3-methanesulfonamidopropyl, 2-methanesulfonylethyl, 2-methoxyethyl, cyclopentyl, 2-acetamidoethyl, 2-carboxyethyl, 2-carbamoylethyl, 3-carbamoylpropyl, 2,3-dihydroxypropyl, 3,4-dihydroxybutyl, n-hexyl, n-octyl, n-decyl, n-dodecyl, n-tetradecyl, n-octadecyl, 1-ethylbutyl, 1-pentyloctyl, 2-hydroxypropyl, 4-hydroxybutyl, 2-carbamoylaminoethyl, 3-carbamoylaminopropyl, 4-carbamoylaminobutyl, 4-carbamoylbutyl, 2-carbamoyl-1-methylethyl, 4-nitrobutyl, and an alkyl group having the following structure.
In this specification, if a substituent group represented by any of R
1
to R
4
is further substituted by another substituent group, the term “total number of carbon atoms” includes the number of carbon atoms of the latter substituent group.
The aryl group is an aryl group having the total number of carbon atoms of 6 to 24. Examples are phenyl, naphthyl, and p-methoxyphenyl.
The heterocyclic group is a 5- or 6-membered saturated or unsaturated heterocyclic ring containing one to five carbon atoms and one or more oxygen, nitrogen, or sulfur atoms as atoms constructing this heterocyclic ring. The ring can be constructed with one or a plurality of hetero atoms and the plural hetero atoms may be the same or different elements. Examples are 2-furyl, 2-thienyl, 2-pyrimidinyl, 2-benzotriazolyl, imidazolyl, and pyrazolyl.
The alkoxyl group is an alkoxy group having the total number of carbon atoms of 1 to 40, preferably 1 to 22. Examples are methoxy, ethoxy, 2-methoxyethoxy, and 2-methanesulfonylethoxy.
The aryloxy group is an aryloxy group having the total number of carbon atoms of 6 to 24. Examples are phenoxy, p-methoxyphenoxy, and m-(3-hydroxypropionamido)phenoxy.
The acylamino group is an acylamino group having the total number of carbon atoms of 1 to 40, preferably 1 to 22. Examples are acetamide, 2-methoxypropionamide, and p-nitrobenzoylamide.
The alkylamino group is an alkylamino group having the total number of carbon atoms of 1 to 40, preferably 1 to 22. Examples are dimethylamino, diethylamino, and 2-hydroxyethylamino.
The anilino group is an anilino group having the total number of carbon atoms of 6 to 24. Examples are anilino, m-nitroanilino, and N-methyl
Ikeda Hideo
Taniguchi Masato
Birch & Stewart Kolasch & Birch, LLP
Chea Thorl
Fuji Photo Film Co. , Ltd.
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