Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
2000-12-08
2002-06-11
Letscher, Geraldine (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S555000, C430S599000, C430S600000, C430S603000, C430S607000, C430S611000, C430S544000, C430S955000, C430S957000
Reexamination Certificate
active
06403293
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to sliver halide color photographic light sensitive materials and in particular to silver halide color photographic materials exhibiting enhanced sensitivity, superior color forming properties and improved storage stability.
BACKGROUND OF THE INVENTION
In conventional silver halide color photographic materials (hereinafter, also denoted as color photographic materials or simply as photographic materials), a subtractive color system is employed and color images are formed by the combination of three dyes derived from yellow, magenta and cyan couplers.
As magenta couplers used in conventional color photographic materials are known 5-pyrazolone, pylazolinobenzoimidazole or indanone type couplers, and of these, 5-pyrazolone derivatives are broadly employed.
Substituents at the 3-position of the 5-pyrazolone ring of the 5-pyrazolone derivatives include, for example, an alkyl group, an aryl group, an alkoxy group described in U.S. Pat. Nos. 2,369,489 and 2,600,788, an acylamino group, and a ureido group described in U.S. Pat. No. 3,558,319. However, such couplers had the disadvantages that coupling activity with an oxidation product of a developing agent was so low that sufficiently high magenta dye image density could be obtained, the magenta dye images obtained through color development resulted in a relatively high secondary absorption in the blue light region and the longer wavelength-side absorption near edge of the main absorption was not sharp.
Further, 3-anilino-5-pyrazolone couplers described in U.S. Pat. Nos. 2,311,081, 3,677,764 and 3,684,514; British patent Nos. 956,261 and 1,173,513, exhibited a relatively high coupling activity, giving a high color density and having advantages such as unwanted absorption in the red light region being relatively low. However, commonly known 3-anilino-5-pyrazolone type couplers have disadvantages that solubility in organic solvents is relatively low and when a color photographic material containing this coupler is aged, precipitation of the coupler tends to easily occur in the photographic material. Furthermore, color photographic materials containing commonly known 3-anilino-5-pyrazolone couplers exhibited a disadvantage that the magenta dye image density, after being processed, varied after being aged.
In commercially available color photographic materials, as is well known, a coupler is not used alone but is used in combination with various functional couplers to improve image quality and color reproducibility. As such functional couplers, so-called DIR couplers and masking couplers (or colored couplers) are generally employed. However, in cases when the 3-anilino-5-pyrazolone coupler is used in combination with a functional coupler, it was shown that the foregoing disadvantages tended to increase.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a silver halide color photographic light sensitive material exhibiting enhanced sensitivity, superior color forming property and improved storage stability.
The above object of the invention can be accomplished by the following constitution:
(1) A silver halide color photographic light sensitive material comprising a support having thereon blue-sensitive, green-sensitive and red-sensitive silver halide emulsion layers, wherein at least one of the silver halide emulsion layers contains a coupler represented by the following formula (I):
wherein R
11
represents a secondary or tertiary alkyl group, or a cycloalkyl group; R
12
represents an aryloxy group; R
13
represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; R
14
represents a halogen atom or an alkoxy group; R
15
, R
16
and R
17
independently represent a substituent; k1 is an integer of 0 to 5; m1 and n1 are each an integer of 0 to 4;
(2) The silver halide color photographic material described in (1) above, wherein the silver halide emulsion layer containing the coupler represented by formula (I) or another silver halide emulsion layer having the same color-sensitivity as the silver halide emulsion layer containing the coupler represented by formula (I) contains a compound represented by the following formula (II):
wherein R
21
and R
24
represent a secondary or tertiary alkyl group, or a cycloalkyl group; R
22
and R
25
represent an aryloxy group; R
23
and R
26
represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; R
27
and R
28
independently represent a substituent; m2 and n2 are each an integer of 0 to 4;
(3) The silver halide color photographic material described in (1) or (2) above, wherein the silver halide emulsion layer containing the coupler represented by formula (I) or another silver halide emulsion layer having the same color-sensitivity as the silver halide emulsion layer containing the coupler represented by formula (I) contains a compound represented by the following formula (III):
wherein W represents a coupler moiety capable of forming a dye capable of being leached out of the photographic material upon reaction with an oxidation product of a color developing agent; TIME represents a timing group capable of releasing an inhibitor residue DI after being released from W upon reaction with an oxidation product of a color developing agent; and n3 is an integer of 0, 1 and 2;
(4) The silver halide color photographic material described in (1) or (2) above, wherein the silver halide emulsion layer containing the coupler represented by formula (I) or another silver halide emulsion layer having the same color-sensitivity as the silver halide emulsion layer containing the coupler represented by formula (I) contains a compound represented by the following formula (IV):
wherein Y represents an yellow coupler moiety capable of forming an yellow dye upon reaction with an oxidation product of a color developing agent; TIME represents a timing group capable of releasing an inhibitor residue DI after being released from Y upon reaction with an oxidation product of a color developing agent; and n4 is an integer of 0, 1 and 2;
(5) The silver halide color photographic material described in any one of (1) through (4) above, wherein the silver halide emulsion layer containing the coupler represented by formula (I) or another silver halide emulsion layer having the same color-sensitivity as the silver halide emulsion layer containing the coupler represented by formula (I) contains a compound represented by the following formula (V):
wherein R
51
and R
52
independently represent a secondary or tertiary alkyl group or a cycloalkyl group; R
53
represents a halogen atom or an alkoxy group; R
54
and R
55
independently represent a substituent; k5 is an integer of 0 to 5; and m5 is an integer of 0 to 4.
DETAILED DESCRIPTION OF THE INVENTION
The coupler (magenta coupler) represented by formula (I) will be described in detail.
In formula (I), R
11
, represents a secondary or tertiary alkyl group (e.g., i-propyl, sec-butyl, t-butyl, t-amyl, etc.) or a cycloalkyl group (e.g., cyclopropyl, cyclopentyl, cyclohexyl, etc.). The group represented by R
11
may be substituted but unsubstituted one is preferred. The group represented by formula R
11
preferably has 3 to 12 carbon atoms, and more preferably 3 to 6 carbon atoms. Specifically preferred R
11
is a secondary alkyl group and iso-propyl group is still more preferred. R
12
represents an aryloxy group (e.g., phenoxy, naphthyloxy, etc.). The aryloxy group may be substituted by substituents and examples of the substituents include the following:
an alkyl group (e.g., t-amyl, t-octyl, dodcyl, etc), an cycloalkyl group (e.g., cyclopropyl, cyclhexyl, etc), an aryl (e.g., phenyl, naphthyl, etc), a heterocyclic group (e.g., 2-tetrahydrofuryl, 2-thiophenyl, 4-imidazolyl, indoline-1-yl, 2-pyridyl, etc), a carbonyl group (e.g., alkylcarbonyl such as acetyl, trifluoroacetyl and pivaloyl, and arylcarbonyl such as benzoyl, pentafluorobenzoyl and 3,5-di-t-butyl-4-hydroxybenzoyl), an oxycarbonyl group (e.g., alk
Hoshino Hiroyuki
Ishige Osamu
Kataoka Emiko
Bierman, Muserlian and Lucas
Konica Corporation
Letscher Geraldine
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