Source: {"pile_set_name": "USPTO Backgrounds"}

1. Field of the Invention
The present invention relates particularly to a color photographic light-sensitive material for use in making photographic prints.
2. Prior Art and the Problems Thereof
Conventionally color photographic light-sensitive materials for use in making photographic prints are generally formed by coating in order on a reflective support an yellow coupler-containing blue-sensitive silver halide emulsion layer, nonlight-sensitive first interlayer, magenta coupler-containing green-sensitive silver halide emulsion layer, nonlight-sensitive second interlayer, cyan coupler-containing red-sensitive silver halide emulsion layer and nonlight-sensitive protective layer.
And particularly in order to prevent the discoloration by ultraviolet rays of the dyes formed by a color development from the respective couplers, an ultraviolet absorbing agent is added to the second interlayer.
However, such conventional print-making color photographic light-sensitive materials have a disadvantage that the dyes formed by a color development from the respective couplers used, particularly the magenta dye and the cyan dye are poor in the resistance to light, tends to be discolored by light with time, and become out of color balance after being discolored.
In that case, if the protective layer also contains an ultraviolet absorbing agent, the resistance to light could be improved.
And by doing so, there is no doubt that the resistance to light of the light-sensitive material can be improved. However, there still exists another disadvantage that the light-sensitive material, after being processed, loses as time goes by the gloss on the surface thereof by light, heat, moisture, and the like; i.e., the so-called sweat phenomenon arises, thus deteriorating the image quality.
The present invention has been made in view of such a situation as described above, and the principal object of the present invention is to provide a color photographic light-sensitive material which is improved so as to prevent possible deterioration of the gloss on the surface thereof caused with time by light, heat, moisture, and the like, and capable of forming a highly light-resistant dye image.
As a result of our various studies on this problem, it has now been found that the above object of the present invention is accomplished by incorporating a 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compound in the liquid form at normal room temperature into the overcoat layer on the uppermost silver halide emulsion layer of a multilayered color photographic light-sensitive material.
Namely, the present invention is of a color photographic light-sensitive material comprising a reflective support having thereon a plurality of silver halide emulsion layers, of which the emulsion layer located farthest from the support has, on each of both the support side thereof and the opposite side thereof to the support side, at least one nonlight-sensitive layer containing an ultraviolet absorbing agent, said ultraviolet absorbing agent used in said nonlight-sensitive layer on said opposite side of said emulsion layer against said support being a 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compound which is in the liquid form at normal room temperature.
The embodiment of the present invention will be illustrated in detail below:
The color photographic light-sensitive material of the present invention (hereinafter referred as to the light-sensitive material) has not less than two silver halide emulsion layers, and, in the normal form, has three spectrally different light-sensitive silver halide emulsion layers each differently having one of three nondiffusible yellow, magenta and cyan couplers.
The combination of the light-sensitive silver halide emulsion layers with the couplers in a normal instance is such that the cyan coupler is in the red-sensitive silver halide emulsion layer, the magenta coupler in the green-sensitive silver halide emulsion layer, and the yellow coupler in the blue-sensitive silver halide emulsion layer.
There are no special restrictions on the coating order of such respective emulsion layers.
Usually, however, from the reflective support side the yellow coupler-containing emulsion layer, magenta coupler-containing emulsion layer and cyan coupler-containing emulsion layer are coated in the described order. Alternatively, if desired, these layers may also be coated in such an order as of the cyan coupler-containing emulsion layer, magenta coupler-containing emulsion layer and then yellow coupler-containing emulsion layer.
As the yellow, magenta and cyan couplers to be used in the present invention, any known couplers may be used.
Preferred yellow couplers include xcex1-pivaloylacetanilide-type couplers.
Preferred magenta, couplers include 5-pyrazolone-type, more preferably, 1-phenyl-5-pyrazolone-type, and further preferably 1-phenyl-3-anilino-5-pyrazolone-type couplers and pyrazolotriazole-type couplers.
Preferred cyan couplers include phenol-type couplers.
Any of these couplers may be contained in an amount of from 0.05 to 1 mole per mole of silver halide in any of the above silver halide emulsion layers.
Of these silver halide emulsion layers, the silver halide emulsion layer located farthest from the support is provided on each of both the support side thereof and the opposite side thereof to the support side with a nonlight-sensitive layer.
These nonlight-sensitive layers comprise such a hydrophilic binder as, e.g., gelatin.
And the nonlight-sensitive layers each contains an ultraviolet absorbing agent.
In this instance, the binder coating amount in each of the nonlight-sensitive layers is normally from 1 to 30 mg/dm2.
On the other hand, of these nonlight-sensitive layers, the one located farther from the support on the emulsion layer located farthest from the support contains not less than one of 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compounds which are in the liquid form at normal room temperature. These 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compounds preferably have the melting point of not more than 30xc2x0 C., more preferably not more than 15xc2x0 C.
The compounds herein are required to be in the liquid form, and, if not, they cannot display the effect to improve the so-called sweat phenomenon, and even if in the liquid form, any ultraviolet absorbing agents other than 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compounds cannot carry out the improvement on the prevention of the sweat phenomenon.
The 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type compounds preferably have the formula: 
wherein R1 and R2 represent an alkyl, an aryl, an alkoxy and aryloxy radical, and R3 represents a hydrogen atom, a halogen atom, an alkyl, an aryl, an alkoxy, an aryloxy, an alkenyl, a nitro or a hydroxyl radical.
More preferably, the compounds having the formula [I] is represented by Formula [II], [III], [IV] or [V]: 
wherein R4 represents a methyl, ethyl or propyl radical, R5 represents a secondary alkyl having from 4 to 10 carbon atoms, R6 represents a hydrogen atom, a halogen atom, an alkyl, or an alkoxy radical having from 1 to 8 carbon atoms; 
wherein R7, R8 and R9 independently represent an alkyl radical having from 4 to 10 carbon atoms, provided that at least one of R7, R8 and R9 represents a secondary alkyl; 
wherein R10 represents a secondary or tertiary alkyl from 1  3 to 8 carbon atoms, X represents an alkylene from 1 to 6 carbon atoms, R11 represents an alkyl group from 1 to 12 carbon atoms, R12 represents the same radical as defined by R6; 
wherein R13 and R14 independently represent a secondary alkyl having from 4 to 10 carbon atoms and R15 represents the same radical as defined by R6.
The following are typical examples of those 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type ultraviolet absorbing agents which are in the liquid form at normal room temperature, but are not limited thereto. 
Any of these liquid 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type ultraviolet absorbing agents may be incorporated singly or in combination of not less than two kinds into the nonlight-sensitive layer adjacent to the outer side (opposite from the support) of the silver halide emulsion layer located farthest from the support.
Any of these liquid ultraviolet absorbing agents may be added to the nonlight-sensitive layer also in combination with any of other ultraviolet absorbing agents which are in the solid form at normal room temperature.
Those suitably available solid ultraviolet absorbing agents are 2-(2xe2x80x2-hydroxyphenyl)benzotriazole-type ultraviolet absorbing agents which are in the solid form at normal room temperature, particularly at 15xc2x0 C. These compounds preferably have the melting point of not less than 15xc2x0 C., more preferably not less than 30xc2x0 C.
If the solid ultraviolet absorbing agent is used in combination with the liquid one, because the molecular weight of the solid one is generally smaller than that of the liquid one, the adding amount by weight of the ultraviolet agent can be reduced, or in the same adding amount, the light-resistant effect of the resulting dye image can be improved. Further, such combined use is advantageous in respect that the using amount of high-boiling solvents that will