Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2003-04-16
2004-06-22
Le, Hoa Van (Department: 1752)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C430S933000
Reexamination Certificate
active
06753425
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a processing composition for silver halide color photographic light-sensitive materials, more specifically, the present invention relates to a composition having an excellent function of reducing staining ascribable to residual sensitizing dyes in the processed light-sensitive material.
2. Description of the Related Art
With remarkable progress of digital camera and color printer, the processing of a silver halide color photographic light-sensitive material is demanded to quickly provide a high-quality image to users. However, since mere shortening of the processing time in conventional methods results in the completion of processing before sensitizing dyes in the light-sensitive material are thoroughly washed out, the highlight part or background part in the white portion of a color print is colored by a large amount of residual sensitizing dyes and the product cannot endure the viewing. In the case of a color negative film, the density in the minimum density part increases, whereby the color balance is lost and an appropriate print cannot be provided.
In recent years, use of silver halide tabular grains is an important basic technique in the preparation of a high-sensitivity light-sensitive material for photographing. This technique is advantageous in that since the amount of sensitizing dyes used per unit volume can be increased, the sensitivity and the sensitivity-graininess ratio are improved, but it has a problem that the amount of sensitizing dyes remaining in the processed light-sensitive material increases. Depending on the processing conditions, the increase in the amount of residual sensitizing dyes cannot be ignored and this causes a phenomenon such as lost of color balance due to increase in the density in the minimum density part of a color negative film or coloration of the highlight part of a color reversal film.
Research Disclosure, No. 20733 discloses a method of using a bistriazinylaminostilbene disulfonic acid compound as one example of the method for removing the residual color ascribable to sensitizing dyes. This method is widely used in the processing of color photographic light-sensitive materials. JP-A-6-329936 (the term “JP-A” as used herein means an “unexamined published patent application”) also discloses a bistriazinylaminostilbene disulfonic acid compound having excellent solubility and capable of reducing the residual color even in the processing shortened in the processing time.
Along with this quick processing of a photographic light-sensitive material, it is also demanded to reduce or maximally recycle the waste containers of processing agents or to more concentrate the processing compositions so as to reduce the cost for transportation or storage of the processing agents or processing chemicals. Accordingly, the additives used for the purpose of reducing the residual color must be suited for this concentration. However, a compound having an effect of reducing the residual color and capable of stably dissolving even in the state concentrated to a high salt concentration and satisfactorily providing the effect even in the processing reduced in the processing time has not yet been found out.
SUMMARY OF THE INVENTION
An object of the present invention is to solve the above-described problems in the techniques of the related art and provide a processing composition for silver halide color photographic light-sensitive materials, which can reduce the staining ascribable to the residual sensitizing dyes in the processed light-sensitive material and can be free of deposition of precipitates during the low-temperature storage of the processing composition.
The object of the present invention can be attained by the following inventions.
(1) A processing composition for silver halide photographic light-sensitive materials, comprising a compound represented by the following formula (I):
wherein R
11
, R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, L represents a phenylene group or a naphthylene group, and the pairs R
11
and R
12
, R
13
and R
14
, R
21
and R
22
, and R
23
and R
24
each may be combined with each other to form a ring, provided that at least one group represented by —SO
3
M, —CO
2
M or —OH (wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or pyridinium) is contained within the molecule, that the case where three or more of R
11
, R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
are an aryl group and the case where at least one of R
11
, R
12
, R
13
and R
14
and at least one of R
21
, R
22
, R
23
and R
24
are combined with each other to form a ring are excluded, and that a group represented by —N═N— is not contained within the molecule.
(2) An image formation method comprising using the processing composition for silver halide photographic light-sensitive materials described in (1).
(3) A compound represented by the following formula (I):
wherein R
11
R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, L represents a phenylene group or a naphthylene group, and the pairs R
11
and R
12
, R
13
and R
14
, R
21
and R
22
, and R
23
and R
24
each may be combined with each other to form a ring, provided that at least one group represented by —SO
3
M, —CO
2
M or —OH (wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or pyridinium) is contained within the molecule, that the case where three or more of R
11
, R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
are an aryl group and the case where at least one of R
11
, R
12
, R
13
and R
14
and at least one of R
21
, R
22
, R
23
and R
24
are combined with each other to form a ring are excluded, and that a group represented by —N═N— is not contained within the molecule.
The above-described compound of the present invention not only affords the means for attaining the object of the present invention but also has the following excellent properties. The compound of the present invention does not emit fluorescence and therefore, when used in combination with a bis(triazinylamino)stilbene disulfonic acid compound in the processing of a color print material, the fluorescent brightness and reduction in staining ascribable to sensitizing dyes can be independently controlled. Accordingly, the compound of the present invention can be preferably used in the processing of a color negative film or a color reversal film, where the processed light-sensitive material is not required to have fluorescent brightness. Furthermore, since the compound of the present invention is highly stable in the bleach-fixing composition or fixing composition as compared with the bis(triazinylamino)stilbene disulfonic acid compound and free of any deterioration in aging, so that stable processing performance can be maintained irrelevantly to the fluctuation in the processing amount per day or processing operation conditions.
DETAILED DESCRIPTION OF THE INVENTION
The compound of formula (I) is described in detail below. The alkyl group represented by R
11
, R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
is a substituted or unsubstituted alkyl group having from 1 to 20, preferably from 1 to 8, more preferably from 1 to 4 carbon atoms and examples thereof include a methyl group, an ethyl group, an i-propyl group, an n-propyl group, an n-octyl group, a sulfomethyl group, a 2-hydroxyethyl group, a 3-hydroxpropyl group, a 2-hydroxypropyl group, a 2-sulfoethyl group, a 2-methoxyethyl group, a 2-(2-hydroxyethoxy)ethyl group, a 2-[2-(2-hydroxyethoxy)ethoxy]ethyl group, a 2-(2-[2-(2-hydroxyethoxy)ethoxy]ethoxy)ethyl group, a 2,3-dihydroxypropyl group, a 3,4-dihydroxybutyl group and 2,3,4,5,6-pentahydroxyhexyl group.
The aryl group represented by R
11
, R
12
, R
13
, R
14
, R
21
, R
22
, R
23
and R
24
is a substituted or unsubstituted aryl group having fr
Kimura Keizo
Nakai Yasufumi
Ogiyama Masashi
Fuji Photo Film Co. , Ltd.
Le Hoa Van
Sughrue & Mion, PLLC
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