JPH05134336A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain a silver halide photographic sensitive material having excellent pressure resistance, good antistatic performance, high sensitivity and high covering power without an increase in fogging during storage and without causing decoloration of silver picture images after treatment. CONSTITUTION:This silver halide photographic sensitive material has at least one layer of silver halide emulsion layer and a hydrophilic colloid layer. The silver halide emulsion layer contains planer silver halide emulsion particles having >=2 aspect ratio. The hydrophilic colloid layer in the position farest from the supporting body contains at least one kind of polymer latex expressed by formula having 50-500nm particle diameter by 0.2-2.0g/m<2>. In formula, R1 and R2 are hydrogen atoms or alkyl groups, R3 is a hydrogen atom, alkali metal or ammonium group. A represents a copolymerizable ethylenically unsatd. monomer, (m) and (n) are 5-100mol% and 0-95mol%, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic light-sensitive material having high sensitivity and improved pressure resistance and antistatic performance.

[0002]

BACKGROUND OF THE INVENTION It is known that the use of a polymer latex in a constituent layer of a silver halide photographic light-sensitive material can improve flexibility, pressure resistance, dimensional stability or drying property. According to Sho 63-153538, high sensitivity,
For the purpose of improving the pressure resistance of tabular silver halide grains having high covering power, it is disclosed that a large amount of polymer latex is added to the silver halide emulsion layer.

However, this method requires a large amount of addition directly into the emulsion layer and is therefore susceptible to the surfactant used as a dispersant in the preparation of the polymer latex.

That is, there are problems that the surface resistivity is deteriorated due to electrostatic damage and the photographic sensitivity is desensitized.
Therefore, US Pat. No. 3,525,620 discloses a method of polymerizing a polymer latex in a specific surfactant, or JP
55-50240 discloses a method using a polymer protective colloid.

However, none of these conventional techniques sufficiently improve the surface specific resistance value, and have a drawback that coating failure occurs with an increase in viscosity.

On the other hand, as a result of various investigations on these techniques, the present inventor found that when a polymer latex was added directly to the silver halide emulsion layer, various additives added for improving and maintaining photographic performance and physical properties were added. A phenomenon was observed in which the polymer latex was occluded.

That is, stagnation of the emulsion coating solution causes fluctuations in photographic performance, increases fog during storage of the film over time, and, in the case of tabular grain emulsions, the silver image after development is aged. It has been found that there is a problem in that it is easy to cause discoloration.

[0008]

SUMMARY OF THE INVENTION Therefore, a first object of the present invention is to provide a silver halide photographic light-sensitive material having excellent pressure resistance, good antistatic performance, high sensitivity and high covering power.

A second object of the present invention is to provide a silver halide photographic light-sensitive material having a high sensitivity and a high covering power, which does not cause fogging during storage with time and has good storability of a processed silver image. Is. Other objects will be apparent from the following specification.

[0010]

The above objects of the present invention are as follows: (1) In a silver halide photographic light-sensitive material having at least one silver halide emulsion layer and a hydrophilic colloid layer on a support, said silver halide emulsion layer Of tabular silver halide emulsion grains having an average aspect ratio of 2 or more in the hydrophilic colloid layer farthest from the support and having a grain size of 50 nm to 500 nm, represented by the following general formula [I]. Silver halide photographic light-sensitive material containing 0.2 g to 2.0 g / m ² of at least one polymer latex, and (2) 90% of the volume of silver halide grains contained in the silver halide. Achieved by the silver halide photographic light-sensitive material described in the above item (1), characterized in that the above is a tabular silver halide grain having at least two kinds of silver halide grains and having a completely uniform halide distribution. To be done.

[0011]

[Chemical 2]

In the formula, R ₁ and R ₂ are hydrogen atoms or alkyl groups.
(For example, an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group), R ₃ is a hydrogen atom, an alkali metal atom (for example, Na or K ion), or ammonium. Represents an ion. A is a copolymerizable ethylenically unsaturated monomer (for example, styrene, sodium vinylbenzene sulfonate, etc.), a monoethylenically unsaturated ester of an aliphatic acid (for example, vinyl acetate), an ethylenically unsaturated monocarboxylic acid and The salt
(For example, acrylic acid, methacrylic acid), maleic anhydride,
Examples thereof include ethyl acrylate, n-butyl acrylate, N-vinylpyrrolidone and the like. m is 5 to 100 mol%, n is 0 to 95
Represents mol%.

The present invention will be described in detail below. The hydrophilic colloid layer farthest from the support referred to in the present invention refers to the uppermost layer of the photosensitive material constituting layer, and specifically includes a protective layer, an antistatic layer, a filter layer, an ultraviolet absorbing layer, a mat layer and the like. However, it is preferably a substantially light-insensitive hydrophilic colloid layer, that is, a protective layer, which is located above the light-sensitive emulsion layer.

A feature of the present invention is to use a polymer latex represented by the general formula [I] in the protective layer.
That is, the disadvantage of the prior art in which a large amount of polymer latex was used in the emulsion layer for improving the pressure resistance of the tabular grains was improved.

The average particle size of the polymer latex represented by the above general formula [I] of the present invention is 50 nm to 500 nm, preferably 120 nm to 350 nm in terms of surface resistivity or silver image storability. The improvement effect of is remarkable. The polymer latex represented by the above general formula [I] of the present invention having a glass transition point of 40 ° C. or lower to −70 ° C. exhibits the desired effects of the present invention.

Next, specific examples of the compound of the polymer latex represented by the general formula [I] of the present invention will be shown, but the present invention is not limited thereto.

[0017]

[Chemical 3]

[0018]

[Chemical 4]

The polymer having the above-mentioned carboxylic acid monomer unit has an average molecular weight of 2,000 to 500,000, preferably 50,000 to 50,000.
It is 150,000.

The above-mentioned polymer latexes are known compounds and can be easily obtained by the method described in JP-A-60-4501, for example.

The amount of the polymer latex used in the protective layer in the present invention is 0.2 g to 2.0 g / m ^{2 as} a dry weight.
In the range of 0.4 g to 1.0 g / m ² , the stagnation stability of the protective layer coating solution and the storage stability of the film with time are improved. If it is 0.2 g / m ² or less, the pressure resistance cannot be improved,
If it is 2.0 g / m ² or more, the film after development is devitrified, and the brittleness of the film increases, and at the same time, the stagnation property of the coating solution and the storability of the film with time deteriorate.

For the addition to the coating liquid for the protective layer, the polymer latex of the present invention may be dissolved in water or a hydrophilic solvent such as methanol or ethanol in advance and added and dispersed at any time before the coating step. As the binder component of the hydrophilic colloid layer containing the polymer latex of the present invention, gelatin is preferable, but other than gelatin, for example, phthalated gelatin and synthetic or natural hydrophilic polymer compounds other than the present invention are used. May be.

In the present invention, each silver halide grain contained in the emulsion layer comprises 90% or more by volume of at least two kinds of silver halides, such as silver iodobromide, silver chlorobromide and chloroiodo. It is composed of silver bromide, silver iodochloride or the like, and of these, a silver iodobromide emulsion is preferable. The amount of silver iodide in the silver iodobromide emulsion is preferably 0.1 mol% to 10 mol%, more preferably 0.3 mol% to 5 mol%.

In the present invention, the fact that the halide distribution is completely uniform refers to a more microscopic distribution, unlike the silver iodide distribution conventionally said for silver iodobromide grains, for example. As a microscopic method for measuring the silver iodide distribution, for example,
Photographic Science and Engineering vol.11.p57.19
67 or the direct method using a transmission electron microscope described in Journal of the Photographic Society of Japan, Vol. 35, No. 4, p. 213.1972, or the method of measuring using X-ray analysis is known.

The Theory of the Photographic P
In Chapter 1 of the fourth edition of rocess (Macmillan Co., New York), the relation of the lattice constant a to the halogen composition is shown for silver iodobromide, silver chlorobromide and silver iodochloride. When the lattice constant (halogen composition) is different, the diffraction peak position is different. Therefore, a silver halide grain having excellent uniformity in halogen composition distribution has a small variation in lattice constant and a narrow half width of a diffraction profile. In the measurement of this diffraction profile, Kα rays having high intensity and good monochromaticity are preferably used as the radiation source over Kβ rays. In addition, K
Since the alpha ray is a double ray, it is possible to obtain the half-width by obtaining a single profile using the method of Rachinger.

The sample is a Journal of Photographic Scie
According to the method of G. Carnell, 1976, Vol. 24, page 1, a coated emulsion film can be used by immersing it in a 50% glycerin solution for 20 minutes to remove the pressure applied to the grain surface by gelatin in the dry film. To obtain the angle of the diffraction profile accurately, use Si powder or NaCl with a known diffraction angle.
A method of mixing the powder with the sample is used. Further, in order to measure the diffraction angle and the line width of the diffraction profile with high accuracy, it is known to use a diffraction profile having a large diffraction angle from a high index plane. Therefore, in the present invention, the diffraction profile of the (420) plane with the Kα ray of the copper target was measured in the region of the diffraction angle (twice the angle of Bragg) 71 ° to 77 °.

The silver halide emulsion used in the present invention is
It contains tabular silver halide grains having an average aspect ratio of 2 or more, preferably tabular grains having an aspect ratio of 3 to 20, and more preferably 3 to 10. It may be 5 to 8 or 8 or more for practical requirements. The tabular silver halide grains account for 50% of the total projected area.
It is preferably not less than 70%, more preferably not less than 70%, particularly preferably not less than 90%.

The size of the tabular grains is 0.4 μm or more, preferably 0.4 μm to 4 μm.

The aspect ratio mentioned here is represented by the ratio of the diameter to the thickness of tabular grains. The grain diameter refers to the diameter of a circle having an area equal to the projected area of the grain when the emulsion is observed under a microscope, and the thickness is indicated by the distance between two parallel planes constituting a tabular grain.

In the silver halide photographic light-sensitive material according to the present invention, the tabular emulsion comprises silver halide grains containing at least two kinds of silver halides as described above.

The method for producing these tabular silver halide grains is as follows:
For example, U.S. Patents 4,434,226, 4,439,520, 4,414,
No. 310, No. 4,425,425, No. 4,399,215, No. 4,435,501
No., No. 4,386,156, No. 4,400,463, No. 4,414,306,
4,425,426, EP84,637A2, JP-A-59-99433, RD-
It may be prepared by the method described in 22534 (1983.1) or the like or a method analogous thereto.

The emulsion used in the silver halide photographic light-sensitive material of the present invention can be produced by a known method. For example, Research Disclosure (RD) No.17643 (December 1978), 22
Can be prepared by the method described in "Emulsion Preparation and Types" on page 23 or the method described on page 648 of the same (RD) No. 18716 (November 1979).

The emulsion used in the silver halide photographic light-sensitive material of the present invention is described, for example, in "The Theory of the" by TH James.
Photographic process ”4th edition, published by Macmillan (1977
Year) Method described on pages 38-104, GF Duffin, “Photograph
ic Emulsion Chemistry ”, published by Focal Press (1966),
“Chimie et Physique Photographique” by P. Glafkides
Published by Paul Montel (1967) or VL Zelikman et al. “Makin
g And Coating Photographic Emulsion "can be prepared by the method described in Focal Press (1964).

That is, the mixing conditions such as the forward mixing method, the reverse mixing method, the double jet method and the control double jet method under the solution conditions such as the acidic method, the ammonia method and the neutral method,
It can be produced using a particle preparation condition such as a conversion method, a core / shell method, or a combination thereof.

A preferred embodiment of the emulsion used in the silver halide photographic light-sensitive material of the present invention is a monodisperse emulsion in which silver iodide is localized inside the grains. The monodisperse referred to here, when measuring the average particle diameter by a conventional method,
At least 95% by number or weight of grains are silver halide grains having an average grain size within ± 40%, preferably within ± 30%.

The grain size distribution of silver halide may be either a monodisperse emulsion having a narrow distribution or a polydisperse emulsion having a wide distribution. The crystal structure of silver halide may be composed of different silver halide compositions inside and outside,
For example, a core / shell type monodisperse emulsion having a clear two-layer structure in which a high silver iodide core portion is covered with a low silver iodide shell layer may be used.

A method for producing the above monodisperse emulsion is known, and for example,
J. Phot. Sci, 12.242 to 251, (1963), JP-A-48-36890,
52-16364, 55-142329, 58-49938, British Patent 1,413,748, US Patents 3,574,628, 3,655,394 and the like.

For the emulsion used in the silver halide photographic light-sensitive material of the present invention, for example, a seed crystal is used as a method for obtaining the above monodisperse emulsion, and the seed crystal is used as a growth nucleus to supply silver ions and halide ions. A grown emulsion may be used.

A method for producing the above-mentioned core / shell type emulsion is known, for example, J. Phot. Sci, 24.198. (1976), US Pat.
The methods described in 250, 3,505,068, 4,210,450, 4,444,877 or JP-A-60-143331 can be referred to.

The emulsion of the present invention may be subjected to physical ripening or grain preparation at the stage of, for example, cadmium salt, lead salt, zinc salt, thallium salt, iridium salt or its complex salt, rhodium salt or its complex salt, iron salt or its complex salt. You may use.

The emulsion may be subjected to a Nudel water washing method, a flocculation sedimentation method or the like in order to remove soluble salts, and a preferable water washing method is, for example, an aromatic hydrocarbon containing a sulfo group described in JP-B-35-16086. Examples thereof include a method using a system aldehyde resin, and a desalting method using a polymer flocculant such as Exemplified G-3 and G-8 described in JP-A-63-158644.

The emulsion used in the silver halide photographic light-sensitive material of the present invention can use various photographic additives in the steps before and after physical ripening or chemical ripening. Examples of the compound used in such a step include (RD) No. 1 described above.
Various compounds described in 7643, (RD) No. 18716 and (RD) No. 308119 (December 1989) can be used. The types of compounds described in these three Research Disclosures (RD) and their locations are listed below.

Additives RD-17643 RD-18716 RD-308119 Page Classification Page Page Classification Chemical sensitizer 23 III 648 Upper right 996 III Sensitizing dye 23 IV 648-649 996-8 IV Desensitizing dye 23 IV 998 B Dye 25 ~ 26 VIII 649 ~ 650 1003 VIII Development accelerator 29 XXI 648 Upper right fog inhibitor / stabilizer 24 IV 649 Upper right 1006 ~ 7 VI Whitening agent 24 V 998 V Hardener 26 X 651 Left 1004 ~ 5 X Surfactant 26-27 XI 650 right 1005-6 XI plasticizer 27 XII 650 right 1006 XII slip agent 27 XII matting agent 28 XVI 650 right 1008-9 XVI binder 26 XXII 1003-4 IX support 28 XVII 1009 XVII halogenation of the present invention Examples of the support used in the silver photographic light-sensitive material include those described in the above RD,
A suitable support is a plastic film or the like, and the surface of the support may be provided with an undercoat layer to improve the adhesiveness of the coating layer, or subjected to corona discharge or ultraviolet irradiation.

The photographic processing of the light-sensitive material of the present invention can be carried out, for example, by XX-XXI of RD-17643, pages 29-30 or XX-XX of 308119.
I, pp. 1011-1012, treatment with a treatment solution may be performed.

[0045]

EXAMPLES The present invention will be further described below with reference to examples.

Example 1 Preparation of Comparative Emulsion A-1: Monoiodine silver iodobromide grains having an average grain size of 0.2 μm and containing 2.0 mol% of silver iodide as a core, and an iodoodor containing 2.0 mol% of silver iodide. Silver iodide was grown at pH 9.8 and pH 7.8 to prepare a silver iodobromide emulsion having a uniform internal iodine composition and an average silver iodide content of 2.0 mol%. The silver halide grains obtained by desalting by a conventional flocculation method have an average grain size of 0.63 μm and a wide distribution of silver halide grains of 16% or less. Had. In addition, the breadth of the distribution here means
It is a value expressed by standard deviation of particle diameter / average particle diameter × 100.

[0047] The liquid B _{1 and the} liquid C ₁ were added to the liquid A ₁ which was vigorously stirred at 40 ° C. by the double jet method to generate nuclei. afterwards
The temperature is lowered to 20 ° C over 40 minutes, and D ₁ solution is added in 20 seconds 5
Aged for minutes.

After that, the pH was adjusted to 6.0 and desalting was carried out by a conventional flocculation method. The resulting seed particles were monodisperse spherical particles having an average particle size of 0.31 μm and a distribution width of 32%. This particle was designated as T-1.

(Preparation of seed emulsion T-2) After the formation of nuclei, pAg was lowered by 0.2 from T-1 described above, and then 18 minutes were taken over 18 minutes.
It was prepared in the same manner as T-1 except that the temperature was lowered to ℃.

The seed particles obtained were monodisperse spherical particles having an average particle size of 0.23 μm and a distribution width of 30%. This particle was designated as T-2.

(Preparation of silver iodobromide grain emulsion S-1) 2.0% by weight gelatin solution containing 0.126 mol of potassium bromide.
With the double jet method, stirring it to 2.61, 1.2
1200 ml each of a halogen salt solution containing 1 mol of silver nitrate solution, 1.176 mol of potassium bromide and 0.024 mol of potassium iodide.
Added over 15 minutes.

During this time, the gelatin solution was kept at 35 ° C.

After that, the emulsion was washed by a conventional flocculation method, 30 g of gelatin was added, and the emulsion was dissolved.
Adjusted to pAg 8.6. The obtained silver iodobromide fine grain emulsion (silver iodide content: 2.0 mol%) had an average grain size of 0.05 μm.

(Tabular silver iodobromide emulsion Em-2, Em-3,
Preparation of Em-4 and Em-5) The seed emulsion T-1 containing 0.3 mol of Em-2 silver iodobromide was added to 2000 ml of water and dissolved, and the temperature was adjusted to 75 ° C and pBr to 1.5. I kept it.

Thereafter, 12 g of 3,6-dithiaoctane-1,8-diol was added to the above solution while stirring, and then a constant flow rate was added so that the silver iodobromide fine grain emulsion S-1 was 550 g in terms of silver nitrate. At 100 minutes over 100 minutes. During this time, pH
Remained at 5.8 and pAg at 9.0.

After the addition was completed, the pH was adjusted to 6.0, and the sensitizing dyes (A) and (B) described below were added at 300 mg and 15 mg, respectively, per mol of silver halide, and the mixture was stirred at 40 ° C. for 30 minutes. In order to remove it, desalting (using Kao Atlas Co.) aqueous solution and magnesium sulfate aqueous solution are desalted,
50 g of gelatin was added to obtain an emulsion having pAg 8.5 and pH 5.85.

The tabular silver iodobromide grains thus obtained were observed by an electron microscope and had an average projected area circle equivalent diameter of 1.1 μm and a distribution width of 20% from the center of the grains of 8% volume (seed grains occupy The silver iodide distribution of the halogen composition excluding the portion was completely uniform (2 mol% of silver iodide), and the aspect ratio (grain diameter / grain thickness) was 2.5.

The Em-3 seed emulsion was prepared in the same manner as Em-2 except that T-2 (particle size: 0.20 μ, distribution: 25%) was used.

Using T-2 corresponding to 0.2 mol, the silver iodobromide fine grain emulsion S-1 was converted to silver nitrate so that the amount would be 580 g.
The pAg was maintained at 9.1 by addition over 0 minutes.

The tabular silver iodobromide grains thus obtained had an average projected area diameter of 1.15 μ and a distribution of 25%, were grains having a completely uniform halogen composition excluding 8% by volume from the center of the grain, and had an aspect ratio of 4.5. there were.

The Em-4 seed emulsion was prepared in the same manner as Em-2 except that T-2 was used.

Using T-2 corresponding to 0.17 mol, the silver iodobromide fine grain emulsion S-1 was added over 120 minutes so as to be 620 g in terms of silver nitrate, and pAg was maintained at 9.2.

The tabular silver iodobromide grains thus obtained had an average projected area of 1.25 μm in diameter and a distribution of 23%, and had a completely uniform halogen composition excluding 7% by volume from the center and an aspect ratio of 6.5. It was

Em-5 was prepared in the same manner as Em-4 except for the following.

A silver iodobromide fine grain emulsion was prepared from a halogen salt solution containing 1.84 mol of potassium bromide and 0.016 mol of potassium iodide and a 1.2 mol of silver nitrate solution.

The tabular silver iodobromide grains thus obtained had an average projected area diameter of 1.25 μm and a distribution of 25%, and the halogen composition was completely uniform except for 7% volume from the center of the grains (silver iodide 1.3 mol%).
The aspect ratio was 7.0.

Em-1 seed emulsion T-1 and a solution shown below were used to prepare a silver halide emulsion Em-1 consisting of tabular twin crystals.

A ₂ ossein gelatin 37 g Propyleneoxy-polyethyleneoxy disuccinate disodium salt (10% methanol solution) 10 mg Seed emulsion T-1 2.84 mol equivalent Water 4000 ml B ₂ ossein gelatin 109 g Potassium bromide 703 g Iodine Potassium iodide 15 g Water 4628 ml C ₂ silver nitrate 1030 g Water 6248 ml To A ₂ which was vigorously stirred at 65 ° C., solution B _{2 and} solution C ₂ were added over 40 minutes by the double jet method. During this time, pH was 5.8 and pAg was
I kept it at 9.0 from beginning to end. The addition rates of solution B _{2 and} solution C ₂ were linearly increased to 6.4 times in the initial and final stages.

After the addition was completed, the pH was adjusted to 6.0 and 300 mg and 15 mg of sensitizing dyes (A) and (B) described below were added per mol of silver halide, respectively. In order to remove excess salts, precipitation desalting was performed using a demol (Kao Atlas) aqueous solution and magnesium sulfate aqueous solution, pAg 8.5, 40 ° C
At pH 5.85 an emulsion was obtained. When the obtained emulsion was observed with an electron microscope, the average grain size (projected area diameter) was 1.0 μm.
m is a tabular silver halide grain having a distribution of 20%,
The particle diameter / particle thickness (aspect ratio) was 2.5.

Emulsions A-1, Em-1, Em-2, E
In order to investigate the microscopic iodine distribution of m-3, Em-4, and Em-5, the X ray diffraction of the (420) plane was measured using the Kα ray described above. At that time, X-ray diffraction measurement was also performed on pure bromide emulsions of the same size. The results are shown in Table 1.

[0071]

[Table 1]

An optimum amount of a mixture of the spectral sensitizing dyes (A) and (B) in a weight ratio of 100: 1 was added to each of the obtained emulsions, and ammonium thiocyanate was added to 1 mol of silver. 2.4 × 10 ^-3 mol / g, and optimum amount of chloroauric acid and Hibo were added for chemical ripening, and then 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene 2 × 10 ^-2 mol was added to stabilize.

An emulsion coating solution was prepared by using the obtained 6 kinds of emulsions and adding the following emulsion additives.

Sensitizing Dye (A) 5,5'-Dichloro-9-ethyl-3,3'-di- (3-sulfopropyl) oxacarbocyanine Anhydrous Sodium Salt Sensitizing Dye (B) 5.5'- Di- (butoxycarbonyl) -1,1'-diethyl-3,
Anhydrous of 3'-di- (4-sulfobutyl) benzimidazolocarbocyanine sodium salt The additives used in the emulsion are as follows. The addition amount is indicated by the amount per mol of silver halide.

1,1-Dimethylol-1-bromo-1-nitromethane 65 mg t-Butyl-catechol 400 mg Polyvinylpyrrolidone (molecular weight 10,000) 1.0 g Styrene-maleic anhydride copolymer 2.5 g Trimethylolpropane 10 g 2-Mercaptobenzimidazole -Sodium 5-sulfonate 3 mg Nitrophenyl-triphenylphosphonium chloride 50 mg 1,3-Di-hydroxybenzene-4-ammonium sulfonate 4 g C ₄ H ₉ OCH ₂ CH (OH) CH ₂ N (CH ₂ COOH) ₂ 1g Thallium nitrate 60mg Latex (ethyl acrylate: methacrylic acid = 95: 5) 100g 2-anilino-4.6-dimercapto-S-triazine monosodium salt 50mg 1-phenyl-5-mercaptotetrazole 10mg

[0076]

[Chemical 5]

The additives used in the protective layer liquid are as follows. However, the protective layer was prepared by adding the polymer latex of the present invention as shown in the table. The added amount is shown as an amount per 1 l of the coating liquid.

190 g of lime-treated inert gelatin + 2 g of acid-treated gelatin i-amyl-n-decylsulfosuccinate sodium salt 1.0 g Polymethylmethacrylate (matting agent having an area average particle diameter of 3.5 μm) 1.1 g Silicon dioxide particles (area average particle diameter 1.2 μm matting agent) 0.5 g Topside 300 (manufactured by Permachem Asia) 0.05 g Bisvinylsulfonylmethyl ether 7 mg / per 1 g of gelatin C ₁₂ H ₂₅ CONH (CH ₂ CH ₂ O) ₅ H 0.5 g

[0079]

[Chemical 6]

Each of the resulting coating solutions was coated on an undercoated polyethylene terephthalate base having a thickness of 175 μm using two slide hopper type coaters, and both sides of the emulsion layer and the protective layer were simultaneously coated in this order to prepare Sample Nos. 1 to 1. Got 32.

The amount of coated silver was 2.0 g / m ^{2 on each} side to prepare a sample. The obtained sample was used as a light source of the standard light B described in “New Edition, Lighting Data Book”, Lighting Society of Japan, 1st edition, 2nd printing, page 39, with an exposure time of 0.1 seconds and a non-filter of 3.2 CMS. Exposed.

These exposed samples are processed by the automatic processor SRX-50.
1 (Konica Corp.) develops with 35 ° C developer XD-SR (manufactured by the same company), fixes with fixer XD-SR (manufactured by the same company), processes in 45 seconds until washing, and drying A sample was obtained.

The developed sample thus obtained was measured for the density (of the maximum density) of each sample using a PDA-65 densitometer manufactured by Konica.
The reciprocal of the amount of light required to obtain a density of 1/4 + fog) was determined and shown as relative sensitivity when the sensitivity of sample No. 1 was 100.

Measurement of surface specific resistance The sample piece was conditioned at a temperature of 25 ° C. and a relative humidity of 20% for 2 hours, and then sandwiched between brass electrodes having an electrode interval of 14 cm and a length of 10 cm.
Measurement was carried out for 1 minute with an insulation meter TR-8651 manufactured by Takeda Riken.

Silver image storability A sample was sandwiched between fluorescent sensitized papers for X-ray photography, KO-250, irradiated with X-rays through a penetrometer type B, and then an automatic processor SRX
-501 (both manufactured by Konica Corporation) using developer XD-S
R treatment at 35 ° C for 90 seconds.

The developed sample thus obtained was divided into two parts, and one of them was allowed to stand in a transparent box having a temperature of 23 ° C. and a relative humidity of 80% for 24 hours, and then a 7% hydrogen peroxide solution was placed in the box. A beaker containing 20 ml was installed, and the beaker was left for 7 hours while irradiating with light from a fluorescent lamp of 220 w.

After standing, the degree of deterioration of the silver image produced in the image area was compared with the other sample which had been conditioned for 24 hours at a temperature of 23 ° C. and a relative humidity of 80%, and the following five-level visual evaluation was carried out. ..

⊚: No discoloration of silver image ○: 〃 extremely low △: 〃 small ×: 〃 somewhat large XX: 〃 very large Preservation of photosensitive material Substitution of preservability of 23 kinds of coated samples As a characteristic forced deterioration test, the sample was allowed to stand for 3 days and 7 days at a temperature of 55 ° C. and a relative humidity of 40%, and then exposed and developed in the same manner as described above to determine fog and sensitivity. The sensitivities in the table are those for sample No. 7 after 7 days of natural standing as a fresh same day sample. It is represented by relative sensitivity when the sensitivity of 1 is 100.

Pressure resistance With respect to the 23 kinds of coated samples, the temperature was 23 ° C. and the relative humidity was 40%.
After conditioning the humidity for 2 hours, it was bent 180 ° with a radius of curvature of 4 mm. Then, the sample was developed as it was without being exposed to light, and the blackening density of the bent portion of the obtained sample was measured to obtain the density difference (ΔD) from the non-blackened portion.

The results obtained are shown in the table below.

[0091]

[Table 2]

[0092]

[Table 3]

[0093]

[Table 4]

As is clear from the table, the samples according to the present invention had good storability of the light-sensitive material over time, and improved pressure resistance and antistatic property. Furthermore, the discoloration of the silver image during storage disappeared and was stable.

[0095]

According to the present invention, a highly sensitive silver halide photographic light-sensitive material having excellent pressure resistance and good antistatic performance was obtained. Further, it was possible to provide a silver halide photographic light-sensitive material which does not cause fog increase during storage with time and has good storage stability of a processed silver image.

Claims (2)

[Claims] 1. A silver halide photographic light-sensitive material having at least one silver halide emulsion layer and a hydrophilic colloid layer on a support, the tabular halogen having an aspect ratio of 2 or more in the silver halide emulsion layer. Contains silver halide emulsion grains,
And in the hydrophilic colloid layer farthest from the support,
A silver halide photographic light-sensitive material containing at least one polymer latex represented by the following general formula [I] having a particle size of 50 nm to 500 nm in an amount of 0.2 g to 2.0 g / m ² . 2. A tabular silver halide grain in which 90% or more by volume of the silver halide grain contained in silver halide comprises at least two kinds of silver halide grains and the halide distribution thereof is completely uniform. 2. The silver halide photographic light-sensitive material according to claim 1, wherein [Chemical 1] In the formula, R ₁ and R ₂ represent a hydrogen atom or an alkyl group, and R ₃ represents a hydrogen atom, an alkali metal atom or an ammonium group. A
Represents a copolymerizable ethylenically unsaturated monomer. m
Represents 5 to 100 mol%, and n represents 0 to 95 mol%.