JPH0961967A - Photographic sensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent blocking without impairing adhesion between a support and a photographic emulsion layer and affecting photographic performance by forming an undercoat layer made of a specified copolymer latex on the polyester film support. SOLUTION: The undercoat layer made of the polymer latex is formed on the polyester support and thus polymer latex is a copolymer latex obtained by executing emulsion polymerization of 100 pts.wt. of a monomer mixture comprising 10-60 pts.wt. of diolefmn type monomers, 90-40 pts.wt. of vinyl monomers, and 0.01-10 pts.wt. of monomers each having >=2 vinyl, acryloyl, methacryloyl, or allyl groups in the molecule, in the presence of 0.3-10 pts.wt. of chain transfer agents comprising 2-100 pts.wt. of a-methvlstyrene dimer and 98-0 pts.wt. of other agents on an aqueous medium. It is preferred to add a dichloro-s-triazine derivative together with this copolymer latex into the undercoat layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic light-sensitive material, and more particularly to a photographic light-sensitive material in which a photographic emulsion layer is provided on a polyester film support through an undercoat layer.

[0002]

2. Description of the Related Art Conventionally, polyethylene tyrephthalate, cellulose triacetate, polystyrene, polycarbonate, polyolefin laminated paper and the like have been widely used as photographic supports because of their excellent transparency and flexibility.

However, when these polymeric substances are used as a support, since each support has a hydrophobic surface, a photographic layer composed of a hydrophilic colloid, which is mainly gelatin, is firmly formed on these supports. Bonding is very difficult.

The surface treatment of the hydrophobic support in the prior art, which has been attempted to overcome such difficulties, is as follows.
(1) After surface activation treatment such as chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment, active plasma treatment, laser treatment, mixed acid treatment, ozone oxidation treatment, etc. There are two methods: a method of directly applying a photographic emulsion to obtain an adhesive force, and (2) a method of once surface-treating these and then providing an undercoat layer and applying a photographic emulsion layer thereon.

(For example, US Pat. No. 2,698,241,
2764520, 2864755, 3143421
No. 3462335, 3475193, 36155
56, British Patent Nos. 788365, 804005,
891469).

Of these, the method (2) is more effective and is widely used. In all of these surface treatments, the surface of the support, which was originally hydrophobic, is made to have some polar groups, and the thin layer which is a negative factor for the adhesion of the extreme surface is removed. It is believed that the adhesive strength of the surface is increased by increasing the crosslink density and the adhesive strength, and as a result, the affinity of the components contained in the undercoating liquid with polar groups is increased, or It can be considered that the surface fastness is increased.

Various methods have been devised as a method of applying the undercoat layer. A layer which adheres well to the support is provided as the first layer, and a hydrophilic resin layer is provided as the second layer on the layer. There are a so-called multi-layer method of applying and a single-layer method of applying only one layer of a resin layer containing both a hydrophobic group and a hydrophilic group.

Each of these methods has been well studied, and for example, a monomer selected from vinyl chloride, vinylidene chloride, butadiene, methacrylic acid, acrylic acid, itaconic acid, maleic anhydride, etc. is used as a starting material. The suitability of various resins such as polyethyleneimine, epoxy resin-grafted gelatin, and nitrocellulose has been investigated, including the copolymers described above. In particular, in order to completely carry out the undercoating method between the hydrophobic support and the hydrophilic silver halide emulsion to obtain a sufficient adhesive strength for practical use in a completely water-based system, vinylidene chloride-based copolymers and diene-based copolymers are preferred. A merger study is underway.

As a method for adhering the base and the emulsion layer, the present inventors have used a diene-based monomer as a component, a copolymer as a single component, or a combination with a suitable crosslinking agent to prepare an undercoat composition. Has been found to be effective as. (For example, JP-A-51-114120, JP-A-54-94025,
(No. 55-65949)

It is well known to coat the undercoated base surface with a hydrophilic substance such as gelatin or a gelatin derivative in order to obtain an adhesive force with a photographic emulsion or the like. in this case,
If the undercoats are left in contact with each other, a so-called blocking phenomenon is likely to occur, and this tendency is remarkable especially under high humidity and high pressure. As a method of preventing this blocking, before applying and winding the undercoat layer, multilayer coating is carried out using a second undercoat liquid containing a so-called hardener, for example, formaldehyde or a matting agent in gelatin. There is a method of winding. As a method not using the second undercoating liquid, the method described in JP-A No. 52-119919 is used, and the film thickness is limited to 0.25 to 1.0 .mu.
There is a method in which synthetic copolymer particles having an average particle diameter of 0.1 to 10.0 μ and a glass transition humidity of 45 ° C. or higher are contained as a matting agent.

[0011]

However, these methods have a number of drawbacks. First of all, the adverse effects of using a matting agent are (1) a loss in the transparency of the film to a considerable extent, resulting in a photographic quality defect. (2) Rolls that come into contact with each other in the process from the drying after the undercoating to the winding and the process thereafter in which the hydrophilic organic colloid layer for photography such as a silver halide photographic emulsion layer is coated and wound. The matting agent is transferred to. (3) These matting agents form nuclei during coating and drying, or cause non-uniformity in the physical properties of the undercoating liquid such as surface tension, exhibiting pinhole-like cissing or stains, and are used as a photographic film base. Loss of value (4) High humidity (60% RH or more) High pressure (1 kg / cm
^{If the} film is laminated under ² or more), a sufficient anti-blocking effect does not occur. These are single layer and 2
It is an adverse effect caused by containing a matting agent in any of the layer coatings.

As a method of not using a matting agent, there is a method of incorporating a hardening agent in the second layer. These methods greatly affect the photographic performance depending on the kind and amount of the hardening agent to be contained, or undercoating. Since it has an adverse effect of insufficient adhesive strength with the emulsion, which is its original mission, and also has insufficient blocking prevention performance, it cannot be said to be an effective method in practice.

Further, the method of incorporating the water-soluble methyl cellulose into the second undercoat layer changes the adhesion of the silver halide photographic emulsion immediately after coating, the wettability of the undercoat layer surface, and the chargeability. Therefore, when the emulsion is coated at a high speed, coating unevenness and static failure are likely to occur, and it is hard to say that the composition is suitable for production.

The object of the present invention is, firstly, to prevent blocking without inhibiting adhesion to the photographic emulsion layer or affecting photographic performance. Second, when a photographic hydrophilic organic colloid layer such as a silver halide photographic emulsion and a back layer is provided on the undercoat layer, it is effective to prevent the blocking of these layers. Thirdly, it is to provide a method for preventing blocking which does not cause cohesion or sedimentation in the undercoat liquid and does not cause cissing or unevenness on the coating and drying base. Fourthly, a uniform film is formed so that the transparency of the film is not adversely affected. Fifth, the undercoated base has an excellent anti-blocking effect even if it is left for a long time under adverse conditions of high humidity and high pressure. The sixth is to provide an undercoat surface having good coatability of the photographic emulsion coating solution.
The seventh object is to provide a method for preventing blocking which does not stain the bath rolls in the undercoating step and the emulsion coating step. Eighth, it is to provide a photographic light-sensitive material capable of preventing blocking which does not cause static failure in the emulsion coating step.

[0015]

In order to achieve the above object, the present invention provides a photographic light-sensitive material having an undercoat layer made of a polymer latex on a polyester film support, wherein the polymer latex is (a) Olefinic monomer 10 to 60 parts by weight (b) Vinyl monomer 90 to 40 parts by weight (c) Having two or more vinyl groups, acryloyl groups, methacryloyl groups or allyl groups in one or more molecules. Α-methylstyrene dimer: 2 to 100% by weight and other polymerization chain transfer agent: 98 to 0% by weight based on 100 parts by weight of a monomer mixture of 0.01 to 10 parts by weight of monomer ( d) Polymerization chain transfer agent: A copolymer latex obtained by emulsion polymerization in an aqueous medium in the presence of 0.3 to 10 parts by weight.

Further, the present invention is preferably such that the undercoat layer comprises
It is desirable that the copolymer latex and the dichloro-s-triazine derivative are contained.

The present invention will be described in more detail below. The polyester film support in the present invention means polyethylene terephthalate, 1,4-cyclohexanedimethylene phthalate, polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate, polypolyethylene naphthalate. Among them, a polyethylene terephthalate film is suitable. The thickness of the support is not particularly limited, but a support having a thickness of 15 to 500 μm, particularly 40 to 200 μm is advantageous from the viewpoint of easy handling and versatility. Further, the support may be transparent, may contain a dye, may contain a pigment such as titanium dioxide, and may further contain silicon dioxide, alumina sol, chromium salt, zirconium and the like. .

In the present invention, an undercoat layer made of a copolymer latex is formed on these polyester film supports. This copolymer latex includes (a) a diolefin-based monomer, (b) a vinyl monomer, (c) one or more kinds of two or more vinyl groups, acryloyl groups, methacryloyl or allyl groups in a molecule. A monomer mixture consisting of monomers having a co-polymer obtained by emulsion polymerization in an aqueous medium in the presence of a polymerization chain transfer agent consisting of α-methylstyrene dimer and another polymerization chain transfer agent. It is a combined latex.

Examples of the (a) diolefin monomer, which is one of the monomers forming the copolymer, include conjugated dienes such as butadiene, isoprene and chloroprene, and butadiene is particularly preferably used.

The vinyl monomer (b), which is the second component of the copolymer used in the present invention, may be any monomer having a vinyl group, but the following are preferred. 1) Styrene, acrylonitrile, methyl methacrylate, vinyl chloride, vinyl acetate and their derivatives, alkyl esters of acrylic acid, acrylamide,
Methacrylamide, acrolein, methacrolein,
Glycidyl acrylate, glycidyl methacrylate,
2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, allyl acrylate, allyl methacrylate, N-methylol acrylamide, N-methylol methacrylamide, vinyl isocyanate,
Allyl isocyanate etc. can be mentioned.

Examples of the styrene derivative include:
Methyl styrene, dimethyl styrene, ethyl styrene,
Diethyl styrene, isopropyl styrene, butyl styrene, hexyl styrene, cyclohexyl styrene, decyl styrene, benzyl styrene, chloro mer styrene, trifluoromethyl styrene, ethoxy methyl styrene, acetoxy methyl styrene, methoxy styrene,
4-methoxy-3-methylstyrene, dimethoxystyrene, chlorostyrene, dichlorostyrene, trichlorostyrene, tetrachlorostyrene, pentachlorostyrene,
Bromstyrene, dibromostyrene, iodostyrene,
Fluorostyrene, trifluorostyrene, 2-bromo-4-trifluoromethylstyrene, 4-fluoro-3
-Trifluoromethylstyrene, vinyl benzoic acid methyl ester and the like can be mentioned.

Among the esters of acrylic acid, preferred are acrylic acid ester, glycidyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate.

Further, the third copolymer of the present invention is used.
Examples of the component (c) having two or more vinyl groups, acryloyl groups, methacryloyl groups, and allyl groups in the molecule include divinylbenzene and 1,5-hexadiene-
Usually added during the polymerization of vinyl monomers such as 3-yne, hexatriene, divinyl ether, divinyl sulfone, diallyl phthalate, diallyl carbinol, diethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolpropane dimethacrylate. So-called crosslinking agents can be mentioned.

The content of the (a) diolefin monomer in the copolymer of the present invention is preferably 10 to 60% by weight, more preferably 15 to 40% by weight based on the total weight of the copolymer. The amount of the vinyl monomer (b) is 90 to 40% by weight based on the total amount, and it is particularly preferable that the vinyl monomer, particularly styrenes, is 70 to 40% by weight based on the total copolymerization. (C) The monomer having two or more vinyl groups, acryloyl groups, methacryloyl groups, and allyl groups in the molecule is 0 with respect to the total of (a) diolefin monomer and (b) vinyl monomer. ．
It is preferably from 0.1 to 10% by weight, particularly from 0.1 to 5% by weight.

As the α-methylstyrene dimer in the polymerization chain transfer agent (d), as an isomer, (a) 2-4-
Diphenyl-4-methyl-1-pentene, (b) 2-4
-Diphenyl-4-methyl-2-pentene, (ha) 1-
There is 1-3-trimethyl-3-phenylindane. α
-A preferred composition for the methylstyrene dimer is
Component (a) is 40% by weight or more, component (b) and / or component (c) is 60% by weight or less, and more preferably (a).
50% by weight or more, (b) component and / or (c) component is 50% by weight or less, and particularly preferably (a) component is 70% by weight or less.
The content of the component (b) and / or the component (c) is 30% by weight or less by weight. (A) The chain transfer effect is excellent as the composition ratio of the component increases.

The α-methylstyrene dimer is an impurity such as unreacted α, as long as the object of the present invention is not impaired.
-Methylstyrene, an α-methylstyrene oligomer other than the above-mentioned components (a), (b) and (c), and an α-methylstyrene polymer may be contained. When α-methylstyrene dimer is used, it can be used in an unpurified state after synthesis of α-methylstyrene dimer as long as it does not impair the purpose.

(D) The proportion of α-methylstyrene dimer in the polymerization chain transfer agent is 2 to 100% by weight, preferably 3
˜100% by weight, more preferably 5 to 95% by weight. The ratio of the α-methylstyrene dimer is 2% by weight.
If it is less than the above range, a copolymer latex excellent in adhesive strength and blocking resistance cannot be obtained. Also, by the combined use of α-methylstyrene dimer and other polymerization chain transfer agent,
The reactivity during the polymerization can be increased.

The amount of the polymerization chain transfer agent (d) used is 0.3 to 10 parts by weight, preferably 0.5 to 7 parts by weight, per 100 parts by weight of the monomer mixture. If the amount of the (d) polymerized chain transfer agent used is less than 0.3 parts by weight, the blocking resistance will be poor, while if it exceeds 10 parts by weight, the adhesive strength will decrease, which is not preferable. The amount of α-methylstyrene dimer used is 100 parts by weight of the monomer mixture,
It is preferably used in the range of 0.1 to 5 parts by weight.

Next, (d) α-in the polymerization chain transfer agent
As the other chain transfer agent used in combination with the methylstyrene dimer, a known polymerization chain transfer agent used in general emulsion polymerization can be used. Specifically, for example,
Octyl mercaptan, n-dodecyl mercaptan, t
-Mercaptans such as dodecyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl mercaptan and t-tetradecyl mercaptan; xanthogen disulfides such as dimethylxanthogen disulfide, diethylxanthogen disulfide, diisopropylxanthogen disulfide; tetramethylthiuram disulfide, tetraethylthiuram Thiuram disulfides such as disulfide and tetrabutyl thiuram disulfide; halogenated hydrocarbons such as carbon tetrachloride and ethylene bromide; hydrocarbons such as pentaphenylethane; and acrolein, methacrolein, allyl alcohol,
2-ethylhexyl thioglycolate, terpinolene, α-terpinene, γ-terpinene, dipentene and the like can be mentioned. These can be used alone or
It is also possible to use a combination of two or more species. Among these, mercaptans, xanthogen disulfides,
Thiuram disulfides, carbon tetrachloride and the like are preferably used.

The copolymer latex of the present invention can be produced by a conventionally known emulsion polymerization method except that the above-mentioned monomer mixture and polymerization chain transfer agent are used. That is, it can be obtained by adding a monomer mixture, a polymerization initiator, an emulsifier, a polymerization chain transfer agent and the like to an aqueous medium such as water and carrying out emulsion polymerization.

The above-mentioned copolymer latex is coated as an undercoat layer on a polyester film support. In this case, the coating amount of the undercoat layer is as solid content per square meter of the polyester film support, 0.01
It is desirable to be 10 to 10 g, particularly 0.05 to 1 g.

Next, in the present invention, when the undercoat layer is formed on the polyester film support, it is preferable to use a dichloro-s-triazine crosslinking agent in combination with the copolymer latex. The combined use of a dichloro-s-triazine-based cross-linking agent remarkably improves the adhesive force under normal humidity conditions, high humidity conditions, and low humidity conditions, and prevents cracking under low humidity conditions, as well as antistatic properties and scratch resistance. It is possible to impart excellent effects such as properties, water resistance, and solvent resistance.

The dichloro-s-triazine type crosslinking agent used in the present invention is shown below.

General formula (1)

[0035]

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(In the general formula (1), A is an alkyl group, a cyclic alkyl group, an aryl group, an aralkyl group, a metal or a hydrogen atom.)

And / or general formula (2)

[0038]

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(In the general formula, R ¹ and R ² are hydrogen, an alkyl group, a cyclic alkyl group, an aryl group, an aralkyl group,
-NHR ³ (R ³ is an alkyl group, an acyl group), R ¹ and R
² may be bonded, or may form a 5- or 6-membered ring containing O, S, N—R ⁴ (R ⁴ is an alkyl group). )

These dichloro-s-triazine crosslinking agents can be added in an amount of 0.1 to 100 parts by weight with respect to the monomer mixture. If the amount of the dichloro-s-triazine-based crosslinking agent added is less than 0.1 part by weight, the improvement of the adhesive strength will be insufficient, and the crack prevention effect, antistatic property, scratch resistance, and water resistance will be obtained under low humidity conditions. , Effects such as solvent resistance tend to be insufficient. On the other hand, when the addition amount of the dichloro-s-triazine-based crosslinking agent exceeds 100 parts by weight, a large amount of unreacted crosslinking agent remains, and it migrates to the upper gelatin layer to form an overhardening layer, which causes adhesion to the emulsion or back layer. It is not preferable because it deteriorates the property.

Specific examples of these dichloro-s-triazine type crosslinking agents include the following.

[0042]

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[0043]

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[0044]

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[0045]

[Chemical 6]

[0046]

[Chemical 7]

[0047]

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In the present invention, it is desirable to provide a second undercoat layer containing a hydrophilic polymer as a main binder on the above undercoat layer.

Here, as the hydrophilic polymer, acylated gelatin such as gelatin, phthalated gelatin and maleated gelatin, cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, acrylic acid,
Grafted gelatin obtained by grafting methacrylic acid or amide onto gelatin, polyvinyl alcohol, polyhydroxyalkyl acrylate, polyvinylpyrrolidone, copolyvinylpyrrolidone-vinyl acetate, casein, agarose, albumin, sodium alginate, polysaccharides, agar, starch, A homopolymer or copolymer of graft starch, polyacrylamide, N-substituted acrylamide, N-substituted methacrylamide or the like, or a synthetic or natural hydrophilic polymer compound such as a partial hydrolyzate thereof is used. These are used alone or as a mixture. A preferred hydrophilic polymer is gelatin or its derivative.

The undercoating liquid according to the present invention is generally well-known coating method, for example, dip coating method, air knife coating method, curtain coating method, roller coating method, wire bar coating method, gravure coating method, or US Pat. It can be applied by an extrusion method or the like using a hopper described in the specification of No. 2681294.

The photographic layer used in the present invention will be described below. As the binder (hydrophilic organic protective colloid) for the photographic layer, acylated gelatin such as gelatin, phthalated gelatin and maleated gelatin, cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, acrylic acid, methacrylic acid or amide can be used as gelatin. Grafted grafted gelatin, polyvinyl alcohol, polyhydroxyalkyl acrylate, polyvinylpyrrolidone, copoly-vinylpyrrolidone-vinyl acetate, casein, agarose, albumin, sodium alginate, polysaccharides, agar, starch,
Synthetic or natural hydrophilic polymer compounds such as graft starch, polyacrylamide, polyethylenimine acylated products, or their partial hydrolysates are used.
These are used alone or as a mixture.

In the photographic layer, other additives are not particularly important in the present invention as long as the binder is the hydrophilic polymer compound as described above, but these hydrophilic binders are halogenated. Various additives, couplers, and latex polymers can be used, including physical development nuclei such as silver sulfide used in silver halide or diffusion transfer photography, and sensitizing materials such as diazo compounds.

Materials usable in the light-sensitive layer of the photographic light-sensitive material of the present invention, for example, silver halide grains, chemical sensitizers, dyes, polymer latex, surfactants, gelatin hardeners, color couplers, anti-fading agents. There is no particular limitation on the antistatic agent, the matting agent, and the like. For example, Research Disclosure
ure) 176, 22-31 (December 1978)
Can be referred to.

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION The most preferred embodiment of the present invention is
An undercoat layer made of a copolymer latex is formed on a biaxially stretched polyethylene terephthalate film support.
The copolymer latex is a diolefin-based monomer such as butadiene, a vinyl monomer such as styrene, acrylic acid, an alkyl ester of acrylic acid, or divinylbenzene, and two or more vinyl groups in one or more molecules. , Acryloyl group,
Emulsification with a monomer mixture of monomers having a methacryloyl group or an allyl group in the presence of α-methylstyrene dimer and other polymerization chain transfer agents such as alkylmercaptans, xanthogen sulfides, and thiuram disulfides. It is a copolymerized latex obtained by polymerization.

A first subbing layer prepared by blending this copolymerized latex with a crosslinking agent composed of a dichloro-s-triazine derivative is provided on both sides of the support, and a second subbing layer containing gelatin in the first subbing layer.
An undercoat layer is provided. A halogenated emulsion layer is provided on one side of the second undercoat layer, and a protective layer is formed on this surface. The other second undercoat layer upper back layer is formed.

Hereinafter, the present invention will be described more specifically by way of examples, but the embodiments of the present invention are not limited thereby.

[0057]

Example A corona discharge treatment was carried out on a biaxially stretched polyethylene terephthalate film having a thickness of 100 μ, and a first undercoating liquid having the following composition was applied at an amount of about 6 cc / m ^2.
18 by applying with a wire bar coater
Dry at 5 ° C. for 1 minute. Next, a first undercoat layer was similarly provided on the opposite surface.

Copolymer latex of Table-1 (solid content 43%) 26 g 2,4-dichloro-6hydroxy-s-triazine sodium salt (1.6%) 18.6 g sodium laurylbenzenesulfonate (1% aqueous solution) ) 2.0 g distilled water 53.8 g

[0059]

[Table 1]

On the above-mentioned first undercoat layer on both sides, a coating solution for the second undercoat layer having the following composition was applied in an amount of about 9 cc / m ^2.
Was applied to both sides so that each surface was coated with two undercoat layers to prepare a film.

Gelatin 1 g Acetic acid 0.3 cc Distilled water 99 cc

Next, an emulsion having the following composition (1) was dried to a thickness of 6.
The coating was performed so that the thickness was 0 μm (the amount of coated silver was 5.0 g / m ² ). Further, a protective layer having the composition (2) was coated on the silver halide emulsion layer, and a gelatin back layer having the following composition (3) was coated on the opposite side to a dry thickness of 5 μm to prepare a photographic light-sensitive material. .

Composition (1) (silver halide emulsion layer) Gelatin 5 g / m ² Silver chloroiodobromide (Cl: 80 mol% Br: 19.5 mol% I: 0.5 mol%) Chloroauric acid 1 g / m ² polyethylene acrylate latex (the same as that used in US Pat. No. 3,525,620 specification Example 3) 1.5 g / m ² sensitizing dye: 3-allyl-5- [2- (1-ethyl) ) -4 Methyl-2 tetrazoline-5 ylidene-ethylidene] rhodamine 6 mg / m ² antifoggant: 4-hydroxy-6-methyl-1,3,3a-7 sotrazaindene 30 mg / m ² polyoxyethylene compound 20 mg / m ² gelatin hardeners: 2-hydroxy-4,6-dichloro--s- triazine sodium salt 60 mg / m ² surfactant: p-sodium dodecylbenzenesulfonate 40 mg / ²

Composition (2) (protective layer) Gelatin 1 g / m ² matting agent: polymethyl methacrylate having an average particle size of 3.0 to 4.0 μm 0.05 g / m ² Surfactant: sodium p-dodecylbenzenesulfonate 0 0.03 g / m ² Gelatin hardening agent: 2-hydroxy-4,6-dichloro-s-triazine sodium 0.01 g / m ²

Formulation (3) Back layer formulation Gelatin 5 g / m ² Gelatin hardening agent: 2-hydroxy-4,6-dichloro-s-triazine sodium salt 0.01 g / m ² matting agent (used for the above protective layer) 0.03 g / m ² polyethylene acrylate latex (same as that used for the above emulsion layer) 50 g / 100 g gelatin dye 0.3 g / m ² of the following dyes (1) :( 2) :( 3) Mixture of (1) :( 2) :( 3) = 1: 1: 1 (weight ratio)

[0066]

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[0067]

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[0068]

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The above photographic light-sensitive materials were examined for blocking property, adhesion between the film support and the emulsion layer, and adhesion between the film support and the back layer.

[Evaluation Method of Blocking] 23 ° C. ± 3
℃, 80 ± 5% RH atmosphere, undercoat film 3
After leaving for a period of time, the film is cut into a size of 35 mm × 35 mm, 5 sets of 2 sheets are superposed on each other, and left under a load of 84 kg in the same atmosphere for 21 hours. This is taken out, the film is peeled off, and the 35 mm × 35 mm for measuring the blotting area is set as one frame, and ranks A to E are provided depending on how many blotting is done in 100 frames in total. Values are shown as an average of 5 sets. Number of frames 0
The case of less than 5 is A class, the case of 5 to 10 is B class, the class of 10 to less than 20 is C class, the class of 20 to less than 30 is D class, and the class of 30 or more is E class.

As a product, if it is within the B class, it is sufficiently durable. Blocking occurs depending on the drying conditions at the time of application, the winding conditions of the film base, the storage conditions, etc. of the products in the C to D classes. E-class produces significant blocking.

[Evaluation Method for Adhesion between Film Support and Emulsion Layer] The adhesive strength test after coating the emulsion and after processing (developing, fixing, washing with water) was carried out by placing a knife at 6 to 5 mm intervals at intervals of 3 to 5 mm. Make 5 × 5 squares, attach the tape here, peel off, and count the number of squares of the peeled emulsion layer. Numbers with 0 are A class, less than 2 are B class, less than 2 to 5 are C class, more than D
Let's class. Practically, there is no problem if it is A to B class.

The adhesive strength test in the treatment liquid was carried out by repeatedly rubbing the end of the emulsion-coated base 15 times with a finger, and the length peeled from the end was A class, 0 mm was less than 2 mm, and B was less than 2 mm.
2 to 4 mm is the C class, and the above is the D class.

LDS-715 was used as a processing solution for the developing solution.
(Fuji Photo Film Co., Ltd.) is used, and the fixing solution is LF
-308 (manufactured by FUJIFILM Co., Ltd.) was used and tested by the plate development processing method.

In these evaluation methods, those usable as photographic materials are Class A to Class B.

[Evaluation Method for Adhesion between Film Support and Back Layer] The adhesion test after coating the back layer and after treatment (developing, fixing, washing with water) is carried out as follows: Adhesion between film support and emulsion layer It is substantially the same as the evaluation method of.

The test results are shown in Table 2.

[0078]

[Table 2]

From the results of Table 2, the results of the blocking evaluation show that the photographic light-sensitive material of the present invention in which the copolymer latex is provided in the undercoat layer has an excellent anti-blocking composition and the adhesion between the support and the emulsion. It was found that there was no problem in the adhesion between the support and the back layer.

[0080]

As described above, according to the present invention, the adhesion between the support and the emulsion and the adhesion between the support and the back layer are improved,
Moreover, blocking can be prevented.

Claims (2)

[Claims] 1. A photographic light-sensitive material having an undercoat layer made of a polymer latex on a polyester film support, wherein the polymer latex is (a) a diolefin monomer 10 to 60 parts by weight (b) a vinyl monomer. Body 90 to 40 parts by weight (c) Monomer mixture consisting of 0.01 to 10 parts by weight of a monomer having two or more vinyl groups, acryloyl groups, methacryloyl groups or allyl groups in one or more kinds of molecules (D) Polymerization chain transfer agent consisting of 2 to 100 weight% of α-methylstyrene dimer and 98 to 0 weight% of other polymerization chain transfer agent to 100 weight parts, in the presence of 0.3 to 10 weight parts 1. A photographic light-sensitive material, which is a copolymer latex obtained by emulsion polymerization in an aqueous medium. 2. The photographic light-sensitive material according to claim 1, wherein the undercoat layer contains the copolymer latex and a dichloro-s-triazine derivative.