Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Reexamination Certificate
2001-09-27
2004-08-10
Huff, Mark F. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
C430S553000, C430S558000
Reexamination Certificate
active
06773875
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a silver halide color photographic light-sensitive material containing a novel cyan coupler, and to a novel pyrrolotriazole compound and a dye-forming compound.
BACKGROUND OF THE INVENTION
It is well known that, in a silver halide color photographic light-sensitive material, an aromatic primary amine color-developing agent, oxidized by the exposed silver halide, which is an oxidizing agent, reacts with a coupler to form a dye, such as indophenols, indoanilines, indamines, azomethines, phenoxazines, and phenazines, thereby forming a dye image. In this photography, a subtractive color photography is employed, and a dye image is formed by yellow, magenta, and cyan dyes. Hitherto, in order to form a cyan dye among these dyes, phenol or naphthol couplers have generally been used. However, these couplers have the serious problem that dyes obtained from these couplers have an undesirable absorption in the green region, which results in conspicuous deterioration of color reproduction. Accordingly, it is strongly desired to resolve this problem.
As a means for resolving this problem, use of the heterocyclic compounds described in, for example, U.S. Pat. Nos. 4,728,598 and 4,873,183, European Patent No. 249453 A2, is proposed. However, these couplers have such fatal problems as low coupling activity. As a coupler that has overcome these problems, pyrroloazole couplers described in, for example, European Patent Nos. 0491197 A1, 0488248, 0545300, 0628867 A1, and 0484909; U.S. Pat. No. 5,164,289, and JP-A-6-347960 (“JP-A” means unexamined published Japanese patent application), are proposed. These couplers are excellent in both hue of the resulting dye and coupling activity. Further, they are also excellent in the point that the molecular extinction coefficient of the resulting dye is high.
However, there is a problem that dyes obtained from these pyrroloazole couplers are apt to cause aggregation in a film, which results in a difference in hue between a high density portion and a low density portion. This problem is especially remarkable when the amount of a high-boiling-point organic solvent (oil) to be used when emulsifying is small.
As a means of resolving this problem, pyrroloazole couplers described in JP-A-9-189988 and JP-A-10-198012 are proposed. Although the dye image obtained from these pyrroloazole couplers is indeed excellent in hue, the color reproduction ranging from the green color to the blue color region is not yet satisfactory. That is, since the extinction coefficient of the cyan dye image in the magenta region, which is not wanted therefor, is large, there is dissatisfaction with the current strong demand for pictures that exhibit more excellent color reproduction.
Further, the dye image obtained from these pyrroloazole couplers is not satisfactory in fastness to light, so that further improvement has been demanded.
Further, when these known pyrroloazole couplers are used, serious problems arise as to the occurrence of both color mixing and stain on the white background. The term “color mixing” means that an oxidation product of the aromatic primary amine color-developing agent produced in another layer (for example, a magenta layer), diffuses into a cyan-color forming layer containing a pyrrolotriazole coupler, and reacts with said pyrrolotriazole coupler upon a coupling reaction, thereby causing an undesired cyan-color forming. The term “stain on the white background” means that, at the unexposed portion, which originally should form a white background, an oxidation product of the developing agent produced by oxidation (for example, air oxidation) of a developing agent slightly remaining in a film of the color photograph after processing, reacts with a cyan coupler upon a coupling reaction, thereby also causing an undesired cyan-color forming (coloration). Therefore, improvement of both of these problems has been strongly demanded from the viewpoint of color reproduction.
On the other hand, in addition to the foregoing silver halide color photographic light-sensitive material, development of compounds capable of providing excellent hue of the resulting dye and light-fastness as mentioned above, especially dye-forming compounds, is strongly demanded in the industry in which dyes, especially dyes for an image, are used.
SUMMARY OF THE INVENTION
The present invention is a silver halide color photographic light-sensitive material that contains a cyan coupler represented by the following formula (I):
wherein R
1
and R
2
each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group or a heterocyclic group, or R
1
and R
2
may bond together to form a 5- or 6-membered nitrogen-containing heterocycle; R
3
represents an alkyl group, a cycloalkyl group or an alkenyl group; R
5
represents an alkyl group or an aryl group; and R
4
, R
6
, R
7
and R
8
each independently represent a hydrogen atom or a substituent, with the proviso that at least one of R
4
, R
6
, R
7
and R
8
represents a substituent, and that two groups of R
4
to R
8
, which adjoin each other, do not bond together to form any ring.
Further the present invention is a pyrrolotriazole compound represented by the above formula (I).
Still further the present invention is a dye-forming compound represented by the above formula (I).
Other and further features and advantages of the invention will appear more fully from the following description.
DETAILED DESCRIPTION OF THE INVENTION
As a result of intensive studies for attaining the foregoing task, the present inventors have found a novel pyrrolotriazole compound that can be used as a dye-forming compound.
According to the present invention, there are provided the following means:
(1) A silver halide color photographic light-sensitive material containing a cyan coupler represented by the following formula (I):
wherein R
1
and R
2
each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heterocyclic group, or R
1
and R
2
may bond together to form a 5- or 6-membered nitrogen-containing heterocycle; R
3
represents an alkyl group, a cycloalkyl group or an alkenyl group; R
5
represents an alkyl group or an aryl group; and R
4
, R
6
, R
7
and R
8
each independently represent a hydrogen atom or a substituent, with the proviso that at least one of R
4
, R
6
, R
7
and R
8
represents a substituent, and that two groups of R
4
, R
5
, R
6
, R
7
and R
8
, which adjoin each other, do not bond together to form any ring.
(2) A pyrrolotriazole compound represented by the following formula (I):
wherein R
1
and R
2
each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heterocyclic group, or R
1
and R
2
may bond together to form a 5- or 6-membered nitrogen-containing heterocycle; R
3
represents an alkyl group, a cycloalkyl group or an alkenyl group; R
5
represents an alkyl group or an aryl group; and R
4
, R
6
, R
7
and R
8
each independently represent a hydrogen atom or a substituent, with the proviso that at least one of R
4
, R
6
, R
7
and R
8
represents a substituent, and that two groups of R
4
, R
5
, R
6
, R
7
and R
8
, which adjoin each other, do not bond together to form any ring.
(3) A dye-forming compound represented by the following formula (I):
wherein R
1
and R
2
each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heterocyclic group, or R
1
and R
2
may bond together to form a 5- or 6-membered nitrogen-containing heterocycle; R
3
represents an alkyl group, a cycloalkyl group or an alkenyl group; R
5
represents an alkyl group or an aryl group; and R
4
, R
6
, R
7
and R
8
each independently represent a hydrogen atom or a substituent, with the proviso that at least one of R
4
, R
6
, R
7
and R
8
represents a substituent, and that two groups of R
4
, R
5
, R
6
, R
7
and R
8
, which adjoin each other, do not bond together to form any ring.
The pyrrolotriazole compound represented by formula (I), which is def
Deguchi Yasuaki
Nakamine Takeshi
Fuji Photo Film Co. , Ltd.
Huff Mark F.
Sughrue & Mion, PLLC
Walke Amanda
LandOfFree
Silver halide color photographic light-sensitive material,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silver halide color photographic light-sensitive material,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silver halide color photographic light-sensitive material,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3314202