Heat-developable color light-senitive material

Details Heat-developable color light-senitive material Heat-developable color light-senitive material

2001-03-01

2002-06-25

Schilling, Richard L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

C430S203000, C430S214000, C430S351000, C430S549000, C430S557000, C430S961000

Reexamination Certificate

active

06410217

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an excellent heat-developable color light-sensitive material that is less in the variation of fogging with variation of the developing temperature during heat development.
BACKGROUND OF THE INVENTION
Heat-developable light-sensitive materials are known in this field. There are descriptions concerning heat-developable light-sensitive materials and processes thereof in, for example, “Fundamentals of Photographic Engineering,” Vol: Non-silver salt photography (published in 1982 from Corona), pp242-255; and U.S. Pat. No. 4,500,626.
In addition to the above, for example, there are descriptions concerning a method of forming a dye image by a coupling reaction between an oxidation product of a developing agent and a coupler, in, for example, U.S. Pat. Nos. 3,761,270 and 4,021,240. Also, there are descriptions concerning a method of forming a positive color image by a light-sensitive silver dye bleaching method, in, for example, U.S. Pat. No. 4,235,957.
Also, a method in which a diffusible dye is released or formed image-wise by thermal-development, and this diffusible dye is transferred to a dye-fixing image-receiving material, has been already put to practical use. In this method, both a negative dye image and a positive dye image can be obtained by changing the type of a dye-providing compound to be used or the type of a silver halide to be used. There are more detailed descriptions in U.S. Pat. Nos. 4,500,626, 4,483,914, 4,503,137 and 4,559,290, JP-A-58-149046 (“JP-A” means unexamined published Japanese patent application), JP-A-60-133449, JP-A-59-218443, JP-A-61-238056, European Patent Application Laid-open No. 220,746A2, Kokai-Giho (Published Technical Report) 87-6199, European Patent Application Laid-open No. 210,660A2, and the like.
Many methods concerning a process for preparing a positive color image by thermal-development have been proposed. For example, U.S. Pat. No. 4,559,290 proposes a method in which a compound, obtained by changing the so-called DRR compound into an oxidized type, having inability to release a color image, and a reducing agent or its precursor, are made to coexist, the reducing agent is oxidized, corresponding to an exposure amount of a silver halide, by thermal-development development, and the compound is reduced by the reducing agent that remains non-oxidized, to release a diffusible dye. Also, in European Patent Application Laid-open No. 220,746A2 and Kokai-Giho 87-6199 (Vol. 12, No. 22), there is a description of a heat-developable color light-sensitive material using a compound that releases a diffusible dye by reductive cleavage of an N—X bond (in which X represents an oxygen atom, a nitrogen atom, or a sulfur atom), as a compound releasing a diffusible dye by the same mechanism as above.
In the meantime, how to restrain fogging during thermal-development is an important point in these heat-developable light-sensitive materials. Reduction in the variation of fogging with variation of the developing temperature during thermal-development is of importance, particularly in consideration of the stability of fogging.
SUMMARY OF THE INVENTION
The present invention is a heat-developable color light-sensitive material which contains at least, on a support, a light-sensitive silver halide emulsion, a binder, and a dye-providing compound, which light-sensitive material contains at least one compound represented by the following formula (I):
wherein R
1
represents a chlorine atom or an alkoxy group, R
2
represents an acylamino group or an alkoxycarbonyl group, R
11
represents a hydrogen atom or an alkyl group, R
12
and R
13
each represent a hydrogen atom, an alkyl group or an alkoxy group, in which R
12
and R
13
may be the same or different from.
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention there are provided the following means.
(1) A heat-developable color light-sensitive material containing at least, on a support, a light-sensitive silver halide emulsion, a binder, and a dye-providing compound, wherein the light-sensitive material contains at least one compound represented by the following formula (I):
wherein R
1
represents a chlorine atom or an alkoxy group, R
2
represents an acylamino group or an alkoxycarbonyl group, R
11
represents a hydrogen atom or an alkyl group, R
12
and R
13
each represent a hydrogen atom, an alkyl group, or an alkoxy group, in which R
12
and R
13
may be the same or different from each other.
(2) The heat-developable color light-sensitive material according to the above (1), wherein the at least one compound represented by formula (I) is added to a protective layer in an amount of 0.01 mg/m
2
or more and 200 mg/m
2
or less.
The present invention and its preferable constitutions will be hereinafter explained in detail.
The compound represented by formula (I) that is used in the present invention may be used either singly or in combinations of two or more.
The amount to be added of the compound represented by formula (I) is in a range preferably from 0.01 mg/m
2
to 200 mg/m
2
, and more preferably from 0.01 mg/m
2
to 100 mg/m
2
.
The compound represented by formula (I) may be added to any layer of the light-sensitive material, and it is preferably added to a protective layer. The protective layer referred to herein is a layer most apart from a support, on the side (of the support) to which a silver halide emulsion is applied.
It is preferable that the compound represented by formula (I) has a ballasting group in its molecule, and it is dispersed in an aqueous medium in the state dissolved in a high-boiling point organic solvent, and it is contained in the protective layer.
In the compound represented by formula (I) for use in the present invention, the alkoxy group represented by R
1
is an alkoxy group preferably having 1 to 30 carbon atoms, the acylamino group represented by R
2
is an acylamino group preferably having 1 to 30 carbon atoms, the alkoxycarbonyl group represented by R
2
is an alkoxycarbonyl group preferably having 2 to 31 carbon atoms, the alkyl group represented by R
11
is an alkyl group preferably having 1 to 30 carbon atoms, the alkyl group represented by R
12
or R
13
is an alkyl group preferably having 1 to 30 carbon atoms, and the alkoxy group represented by R
12
or R
13
is an alkoxy group preferably having 1 to 30 carbon atoms.
The compound represented by formula (I) for use in the present invention is a compound known, for example, in U.S. Pat. No. 5,342,742; and this compound can be synthesized, for example, according to the preparation method described in JP-A-63-123047.
Specific examples of the compound represented by formula (I) which is used in the present invention are shown below, but these examples do not limit the scope of the present invention.
TABLE 1

Com-
pound
R
1
R
2
R
11
R
12
R
13
1
Cl
A
PhCH
2
CH
3
O
H
2
Cl
A
PhCH
2
C
2
H
5
O
H
3
Cl
B
PhCH
2
CH
3
O
H
4
Cl
A
H
CH
3
CH
3
5
Cl
n-C
17
H
35
CONH
H
CH
3
CH
3
6
Cl
n-C
17
H
35
CONH
PhCH
2
C
2
H
5
O
H
7
CH
3
O
A
PhCH
2
C
2
H
5
O
H
8
CH
3
O
n-C
14
H
29
OCO
CH
3
C
6
H
13
O
H
9
CH
3
O
n-C
14
H
29
OCO
CH
3
C
2
H
5
O
H

10 
Cl
PhCH
2
C
2
H
5
O
H

11 
Cl
H
CH
3
CH
3

The light-sensitive material of the present invention basically comprises a light-sensitive silver halide (emulsion), a binder (preferably a hydrophilic binder), and a dye-providing compound being capable of releasing a diffusible dye corresponding to silver development, on a support, and the light-sensitive material may further contain an organic metal salt oxidant, and the like, according to the need. These components are added to the same one layer in many cases, but they may be divided and added separately to different layers as far as they are in a reactive state.
In the heat-developable light-sensitive material of the present invention, the constitutions other than the aforementioned points may be accorded with the known ones.
In order to obtain a wide range color within the chromaticity diagram by using three primary colors of yellow, magenta and cyan, a combinat

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