JPH11352635A - Information recording material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording material for magnetic recording media, films for OHPs, recording materials for ink jet printers, silver halide photographic sensitive materials, etc., improved in antistatic and transporting properties. SOLUTION: The information recording material having at least two layers on at least one side of a base is the information recording material which is formed by setting the dielectric constant of the layer existing furthest from the base larger by 5 (e, s. u) than the dielectric constant of the base or has at least one photosensitive silver halide emulsion layer and at least one non- photosensitive layer existing on the side further from the photosensitive silver halide emulsion layer viewed from the base on at least one side of the base. In such a case, the dielectric constant of the nonphotosensitive layer of this information recording material is set higher than the dielectric constant of the photosensitive silver halide emulsion layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording material having improved antistatic properties and transport properties, and more particularly to various types of magnetic recording media, OHP films, ink jets and the like having improved antistatic properties and transport properties. And information recording materials such as silver halide photographic materials.

[0002]

2. Description of the Related Art Magnetic recording media, OHP films, various types of recording materials for printers such as ink jets, and information recording materials such as silver halide photographic light-sensitive materials are rubbed against each other or by contact with other substances. It is easy to be charged or peeled off and become charged with static electricity. These accumulated electrostatic charges cause many obstacles. For example, dust may adhere to the surface of the information recording material, or if it is attempted to use the superposed information recording material for use, it may be difficult to remove the information one by one or a failure may occur during transport. Problems occur.

In particular, in a photographic light-sensitive material, an electrostatic charge accumulated by charging causes more obstacles. The most serious obstacle is that the photosensitive emulsion layer is exposed by the discharge of the charged electrostatic charge, and the developed photographic material is
A point-like spot or a dendritic or feather-like line spot called a static mark is generated. If this phenomenon appears on medical or industrial X-ray films, etc., it is very dangerous because wrong decisions are made. This phenomenon is one of the very troublesome problems since it becomes apparent only after development.

[0004] Charging causing such a problem is generated in many steps in various steps. For example, in the production process, it is caused by contact friction between a photographic film and a roller, or separation of a support surface and an emulsion surface during a winding or rewinding process of the photographic film. Also in finished products,
For example, it occurs due to contact / separation with a mechanical part or a fluorescent intensifying screen during automatic photographing with an X-ray film. In addition, it also occurs in contact with packaging materials.

[0005] The static mark of the photographic light-sensitive material induced by the accumulation of the electrostatic charge becomes more prominent as the sensitivity of the photographic light-sensitive material increases and the processing speed increases.

In particular, in recent years, the sensitivity of photographic materials has been increased, and the opportunity of receiving severe handling by high-speed coating, high-speed photographing, high-speed automatic processing, and the like has increased. It's getting easier.

Further, the automatic transportability after the development processing has recently become a major problem, and there is a demand for an improvement that maintains the antistatic property even after the development processing.

Conventionally, various antistatic techniques have been proposed to meet these requirements. For example, JP
JP-A-9-91165 and JP-A-49-121523 disclose a technique using an ionic polymer having a dissociating group in a polymer main chain. In addition, JP-A-2-
Japanese Patent Application Laid-Open No. Sho 63-8969 and No. 2-182491 using a conductive polymer.
-55541, 63-148254, 63-148254, 63-148256, and a technique using a surfactant as described in JP-A-1-134191 is known. I have.

[0009] However, these techniques have not been satisfactory.

[0010] The inventors of the present invention have studied the relationship between the dielectric constant of a constituent layer such as a support and the like constituting the information recording material and the electrification in the information recording material. It has been discovered that the above-mentioned static failure can be prevented particularly in a silver halide photographic light-sensitive material.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an information recording material such as a magnetic recording medium, an OHP film, a recording material for an ink jet printer, and a silver halide photographic light-sensitive material having improved antistatic properties and transportability. Is to provide. It is a further object of the present invention to improve the antistatic properties and transport properties without adversely affecting information recording materials such as silver halide photographic materials.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to provide: (1) an information recording material having at least one layer on at least one side of a support; The modulus is 5 times higher than the dielectric constant of the support.
An information recording material characterized by being larger than (esu). (1st invention) (2) The information recording material as described in (1) above, which has a photosensitive silver halide emulsion layer. (Second invention) (3) At least one photosensitive silver halide emulsion layer on at least one side of the support and a non-light-sensitive silver halide emulsion layer located farther from the photosensitive silver halide emulsion layer when viewed from at least one support. An information recording material having a photosensitive layer, wherein the dielectric constant of the non-photosensitive layer is higher than the dielectric constant of the photosensitive silver halide emulsion layer. (Third invention) is achieved.

Hereinafter, the present invention will be described in detail.

As the information recording material of the present invention, for example,
Examples include magnetic recording media, OHP films, various types of recording materials for printers such as ink jets, and information recording materials such as silver halide photographic photosensitive materials.

In the first invention, the information recording material has two or more layers on at least one side of the support, and the dielectric constant of a layer located farthest from the support has a dielectric constant. It is characterized in that it is made 5 (esu) or more larger than the dielectric constant.

The two or more layers may be on one side of the support or on both sides. In addition, a layer for recording information may be provided, or may not be provided specially. Further, any one of the two or more layers may be a layer for recording information. The information recording material may be provided with a photosensitive silver halide emulsion layer. (Second Invention) In the third invention, the information recording material comprises at least one photosensitive silver halide emulsion layer on at least one side of the support and the photosensitive silver halide emulsion as viewed from at least one support. It has a non-photosensitive layer located farther from the layer, and is characterized in that the dielectric constant of the non-photosensitive layer is higher than that of the photosensitive silver halide emulsion layer.

The light-sensitive silver halide emulsion layer and the non-light-sensitive layer may be provided on one side or both sides of the support.

In the present invention, the dielectric constant can be measured by using an impedance measuring device used for measuring the dielectric constant of an electronic component. A preferable dielectric constant measuring device is an impedance measuring device capable of measuring at a frequency of 10 kHz or less, and can be measured by combining the measuring device with a film measuring electrode. More specifically, for example, the combination is a combination of a precision LCR meter HP4284A and HP16451B manufactured by YHP.

When another device is used, it is necessary to correct the electrode portion.

An example in which the dielectric constant at 1000 Hz is obtained by using a combination of the precision LCR meters HP4284A and HP16451B manufactured by YHP will be described in detail below. If the absolute value of the impedance at a frequency of 1000 Hz of the film material can be accurately measured, The measuring method is not limited.

Precision L connecting two electrodes composed of parallel planes and HP16451B having guard electrodes
23 ° C, 20% RH using CR meter HP4284A
In an atmosphere, the dielectric constant of the film material is measured by a void method.

Regarding the measurement by the void method, see HP16451.
Follow the electrode non-contact method described in the instruction manual for B.
A sample is placed between electrodes composed of parallel planes, and measurement is performed while applying an AC voltage.

The dielectric constant of the surface layer is a value obtained by shaving the surface layer portion so as to have a thickness of 0.4 ± 0.1 μm, accurately measuring the film thickness, and then measuring the dielectric constant. The dielectric constant of the photosensitive silver halide photosensitive layer was measured by preparing a single film from the photosensitive silver halide photosensitive layer coating solution.

In the third invention, the object of the present invention can be achieved by making the dielectric constant of the non-photosensitive layer higher than the dielectric constant of the photosensitive silver halide photosensitive layer. The dielectric constant is one more than the dielectric constant of the photosensitive silver halide photosensitive layer.
To 20 (esu) higher.

As the support used in the present invention, for example, cellulose nitrate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, polycarbonate, polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer Such as fluorine resin, polyphenylene oxide, modified polyphenylene oxide, polyethylene, polyethylene terephthalate, polypropylene, polystyrene, syndiotactic polystyrene (SPS), polybutyne-1, polyethylene-
Films of polyesters such as 2,6-naphthalate and the like, or laminated films of these can be used.

As a support for an information recording material requiring optical properties such as transparency and haze, a cellulose triacetate film and a film polyester film are preferable.

In the first invention and the second invention, 2
Any of the above layers can be used as long as it has a film-forming property, and examples thereof include a hydrophobic polymer and a hydrophilic polymer.

Depending on the purpose, the information recording material includes a magnetic recording layer, a lubricating layer, a mat layer, a silver halide emulsion layer, a filter layer, an intermediate layer, an antihalation layer, a protective layer, a crossover cut layer, and an ultraviolet ray. Absorption layer, overcoat layer, hydrophilic colloid layer, masking layer, ink absorption layer,
Various layers such as a back coat layer and an undercoat layer are provided,
In the first invention and the second invention, one of two or more layers or two or more layers may be each of these layers. Further, these layers may be provided as separate layers.

In the third invention, the object of the present invention can be achieved by making the dielectric constant of the non-photosensitive layer higher than the dielectric constant of the photosensitive silver halide emulsion layer. The dielectric constant is one more than the dielectric constant of the photosensitive silver halide emulsion layer.
To 20 (esu) higher.

In the third invention, when two or more photosensitive silver halide photosensitive layers are provided, these photosensitive silver halide photosensitive layers may have the same characteristics but different characteristics. Is also good. Further, examples of the non-photosensitive layer include a filter layer, an intermediate layer, an antihalation layer, a protective layer, a crossover cut layer, an ultraviolet absorbing layer, an overcoat layer, and a backcoat layer.
Of these non-photosensitive layers, the non-photosensitive layer located farther from the photosensitive silver halide emulsion layer may be used as the non-photosensitive layer located farther from the photosensitive silver halide emulsion layer in the third invention. Good. Further, a non-photosensitive layer located farther from the photosensitive silver halide emulsion layer in the third invention may be provided as a layer different from these layers.

In order to provide each layer on the support, the surface of the support is subjected to a corona discharge treatment to improve the adhesion to the support.
It is preferable to perform glow discharge treatment, UV irradiation treatment, flame treatment, or the like. It is also preferable to provide one or more undercoat layers.

Hereinafter, the information recording material of the present invention will be described, taking as an example the case where the information recording material of the present invention is an information recording material having a photosensitive silver halide emulsion layer.

The support is preferably provided with an undercoat layer in order to improve the adhesiveness. The undercoat layer may be of any type. Further, in order to improve the adhesion between the support and the undercoat layer, the surface of the support is preferably subjected to a corona discharge treatment, a glow discharge treatment, a UV irradiation treatment, a flame treatment or the like before applying the undercoat layer. .

When a hydrophilic colloid layer is provided on a support as in a photographic light-sensitive material, for example, an undercoat layer composed of two layers is preferably used.

When a two-layer undercoat layer is provided, various polymers can be used for the first layer of the undercoat layer. When a hydrophobic polymer is used for the first layer of the undercoat layer, the hydrophobic polymer includes a styrene-acryl copolymer, a vinylidene chloride copolymer, a styrene-butadiene copolymer, an acrylate ester and / or a methacrylate ester. A polymer or the like is used, and more preferably a styrene-acrylic copolymer, an acrylate or /
And methacrylic acid ester copolymers.

As the styrene-acrylic copolymer, a copolymer having a styrene / acrylic monomer ratio of 2/8 to 8/2 may be used. Further, as a third copolymerization component, an epoxy group-containing monomer; acrylic acid, methacrylic acid A copolymer containing a carboxyl group or a salt thereof such as an acid and a salt thereof (sodium salt, potassium salt, ammonium salt); and a copolymer using a hydroxyl-containing monomer or the like may be used.

For the first layer of the undercoat layer, a water-soluble polyester can also be preferably used. These water-soluble polyesters are basically substantially linear polymers synthesized from a polybasic acid having a hydrophilic group or an ester-forming derivative thereof and a polyol or an ester-forming derivative thereof. As the polybasic acid component, terephthalic acid, isophthalic acid, phthalic acid, 2,6-
Examples thereof include naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, and isomeric acid. Examples of the polyol component include ethylene glycol, 1,4-hexanediol, 1,4-hexanedimethanol, diethylene glycol, and poly (ethylene oxide) glycol. Each of these polybasic acid components and polyol components may be used in combination of two or more. In order to make these polyesters have a hydrophilic group, these polyester-forming components include organic sulfonates, carboxylates, diethylene glycol,
A compound having a hydrophilic group such as polyalkylene ether glycol is used.

As the water-soluble polyester, a polyester having a hydrophilic group introduced by a sulfonate, diethylene glycol, polyalkylene ether glycol or the like is particularly preferable.

Examples of the compound having a sulfonate group used to introduce the sulfonate salt into the water-soluble polyester as a hydrophilic group include sodium 5-sulfoisophthalate, ammonium 5-sulfoisophthalate, and 5-sulfoisophthalic acid. It is preferable to use an alkali metal sulfonic acid salt compound such as potassium or potassium 2-sulfoterephthalate or an amine sulfonic acid salt compound.

Further, for the first layer of the undercoat layer, a polymer obtained by modifying a water-soluble polyester with a vinyl polymer can also be used. Examples of the polymer obtained by modifying a water-soluble polyester with a vinyl polymer include the water-soluble polyester described above and a water-soluble polyester / vinyl polymer = 99/1 to
A polymer modified with a vinyl polymer at a ratio of 5/95 is preferred. Examples of usable vinyl monomers include, for example, alkyl acrylate and alkyl methacrylate (the alkyl groups include methyl, ethyl, propyl, i
-Propyl, butyl, i-butyl, t-butyl, 2-ethylhexyl, cyclohexyl, phenyl, benzyl,
Phenylethyl and the like. A) hydroxyl-containing monomers such as 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, and 2-hydroxypropyl methacrylate; acrylamide, methacrylamide, N-methylmethacrylamide, N-methylacrylamide, N-
Amide group-containing monomers such as methylol methacrylamide, N-methylol acrylamide, N, N-dimethylol acrylamide, N-methoxymethyl acrylamide; N, N-diethylaminoethyl acrylate;
Amino group-containing monomers such as N-diethylamino methacrylate; epoxy group-containing monomers such as glycidyl acrylate and glycidyl methacrylate; acrylic acid, methacrylic acid and salts thereof (sodium salt, potassium salt,
Monomers containing a carboxyl group or a salt thereof such as ammonium salt); monomers containing a sulfonic acid group or a salt thereof such as styrene sulfonic acid, vinyl sulfonic acid and salts thereof (sodium salt, potassium salt, ammonium salt, etc.) A monomer containing a carboxyl group or a salt thereof such as itaconic acid, maleic acid, fumaric acid and salts thereof (sodium salt, potassium salt, ammonium salt, etc.); containing an acid anhydride such as maleic anhydride or itaconic anhydride. Monomer; styrene; vinyl isocyanate;
Allyl isocyanate; vinyl methyl ether; vinyl ethyl ether; acrylonitrile; vinyl chloride; vinyl acetate; vinylidene chloride and the like. One of the above monomers may be used alone, or two or more thereof may be used in combination.

The coating amount of the first undercoat layer is preferably 1 to 30 g, more preferably 5 to 20 g, in terms of the weight of the coating solution per 1 m ² of the support.

As a coating method, various known methods can be used. For example, a roll coating method, a gravure roll coating method, a roll brushing method, a spray coating method, an air knife coating method, a bar coating method, an impregnation method, a curtain coating method and the like can be used alone or in combination.

If necessary, a crosslinking agent, a surfactant, a swelling agent, a matting agent, an antistatic agent and the like can be added to the undercoating first layer coating solution. Examples of the crosslinking agent include triazine-based, epoxy-based, vinyl-based, aziridine, ethyleneimine-based and methylol-based compounds.

The second undercoat layer provided on the first undercoat layer
The layer preferably contains a water-soluble polymer having a hydrophilic group such as a maleic acid copolymer, gelatin, or the like, in order to enhance the adhesion to the applied hydrophilic colloid layer.

In the present invention, in the first invention and the second invention, the dielectric constant of the layer located farthest from the support is made 5 (esu) or more larger than the dielectric constant of the support, In the third invention, the dielectric constant of the non-light-sensitive layer located farther from the photosensitive silver halide emulsion layer as viewed from the support is made higher than the dielectric constant of the photosensitive silver halide emulsion layer. As additives to control the rate,
Although not particularly limited, a polymer latex obtained from the following water-soluble polymer, conductive fine particles, metal oxide-coated flat inorganic fine particles, hydrophilic polymer, and a polymerizable monomer having a fluorine atom is preferably used.

In the present invention, a water-soluble polymer, a conductive fine particle, a flat inorganic fine particle coated with a metal oxide, a hydrophilic polymer and a polymerizable polymer having a fluorine atom which are preferably used for controlling the dielectric constant are described below. The polymer latex obtained from the monomer will be described.

1. Water-soluble polymer Examples of the water-soluble polymer include a water-soluble polymer having a sulfonic acid group and a carboxyl group.

The water-soluble polymer having a sulfonic acid group and a carboxyl group can be produced, for example, by copolymerizing a monomer having a sulfonic acid and a monomer having a carboxyl group.

Examples of the monomer having a sulfonic acid group include vinyl sulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamidoethylsulfonic acid, allylsulfonic acid, methallylsulfonic acid,
Examples include styrene sulfonic acid and the like and salts thereof. Of these, styrene sulfonic acid and its salts are preferably used.

As the monomer having a carboxyl group,
For example, monocarboxylic acids or dicarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid, or dicarboxylic anhydrides may be mentioned. Of these, dicarboxylic acids are preferably used, and maleic acid is particularly preferred.

The water-soluble polymer having a sulfonic acid group and a carboxyl group includes, in addition to the monomer having a sulfonic acid group and a carboxyl group, other monomers having a copolymerizable vinyl group. May be used.

The method for polymerizing the above monomer is not particularly limited, and a conventionally known method can be applied. Specifically, for example, a monomer having a sulfonic acid group and a monomer having a carboxyl group and, if necessary, other monomers are dissolved in water, and a polymerization initiator (for example, Polymerization can be carried out by adding potassium sulfate) and heating.

Further, the water-soluble polymer having a sulfonic acid group and a carboxyl group can be prepared by another method. That is, the water-soluble polymer is also prepared by polymerizing a monomer having no sulfonic acid group and a monomer having a carboxyl group to form a copolymer, and subjecting the copolymer to a sulfonation treatment. Obtainable.

The monomer having no sulfonic acid group is not particularly limited, and for example, styrene, α-methylstyrene and the like are used.

Then, a copolymer is produced by polymerization with a monomer having a carboxyl group by the above-mentioned method, and the copolymer is subjected to a sulfonation treatment. The method of the sulfonation treatment is not particularly limited, and a conventionally known method can be applied. Specifically, the above-mentioned copolymer is put into a solvent, and a sulfonation treatment is performed using a sulfonating agent.

As the solvent, dichloromethane, 1,1,
Chlorohydrocarbons such as 2-dichloroethane, hydrocarbons such as n-hexane and cyclohexane, dioxane and the like are mentioned as good solvents. Among these, dichloroethane, which does not easily react with the sulfonating agent and does not form a salt upon neutralization, and the like can be mentioned as a suitable solvent. Further, as the sulfonating agent, SO _3, a complex of Lewis acid to SO _3, and the like chlorosulfonic acid. The reaction of the sulfonating agent in the solvent is preferably performed at a low temperature of 30 ° C. or lower.

However, the method of copolymerization using styrene sulfonic acid or the like is easy and economical.
preferable.

In such a water-soluble polymer, the ratio of the sulfonic acid group to the carboxyl group is sulfonic acid group / carboxyl group = 10 / 90-95 / by the molar ratio of the functional group.
5 is more preferable, and more preferably a sulfonic acid group /
Carboxyl group = 20/80 to 80/20, particularly preferably sulfonic acid group / carboxyl group =
It is in the range of 30/70 to 60/40.

When the sulfonic acid group-containing monomer is styrene sulfonic acid and the carboxyl group-containing monomer is maleic acid, the ratio is preferably 40/60 to 95/5, and 50/50 to 95/50. 5 is particularly preferred in terms of ease of production.

The water-soluble polymer has a weight average molecular weight of 1
000 to 500,000 is preferable, and especially 200
The range of 0-100,000 is preferable.

The above water-soluble polymer is highly soluble in aqueous solvents.
When a molecule is introduced, it is acidified by sulfonic acid and carboxylic acid.
But it may or may not be neutralized.
Can also be used. When neutralizing, use N as a counter ion.
a⁺, K⁺, (NH _Four)⁺Neutralizing agents and ingredients for cationic ions such as
Physically, NaOH, KOH, LiOH, NH_FourOH,
Triethanolamine, 2-amino-2-methylpropa
Use of inorganic or organic alkaline substances such as knol
Can be. The preferred neutralizing agent is NaOH.

Hereinafter, specific examples of the water-soluble polymer used in the present invention will be shown.

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[0065]

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[0070]

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[0071]

Embedded image Examples of the natural water-soluble polymer include gelatin, lignin, starch, pullulan, cellulose, alginic acid, dextran, dextrin, guar gum, gum arabic, glycogen, laminaran, lichenin, nigellan, and derivatives thereof. Derivatives include, in particular, those that are sulfonated, carboxylated, phosphorylated, sulfoalkylated, or carboxyalkylated, alkylphosphorylated, and salts thereof. In particular, dextran and its derivatives are preferred.

The following is an example of synthesizing the above water-soluble polymer. —Synthesis of Water-Soluble Polymer (A) — In a reaction vessel equipped with a stirrer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, put 1,000 parts of degassed distilled water, and add sodium styrenesulfonate (hereinafter referred to as StSO _3). 465 parts and 87.5 parts of maleic acid (hereinafter may be abbreviated as MA) are dissolved and stirred,
Introduce nitrogen gas, fill the container with nitrogen gas, 70 ℃
Heated. Separately, 40 parts of isopropanol and 250 parts
Dissolve 0.5 part of potassium persulfate in a solution consisting of 1 part of water, put it in a dropping funnel, drop it into the reaction vessel not too late, raise the temperature to 75-80 ° C, and heat for 2 hours to give a viscous colorless A clear solution was obtained.

The solution was poured into a large amount of acetone to precipitate the polymer, washed several times with acetone, dried at 50 ° C.
A white solid of the water-soluble polymer (A) was obtained. As a result of measuring the molecular weight of this water-soluble polymer (A) by GPC,
The weight average molecular weight was about 10,000. The component composition of the water-soluble polymer (A) is StSO ₃ Na: MA = 3:
1 (molar ratio).

2. Conductive Fine Particles As the conductive particles, particles in which the above water-soluble polymer having a sulfonic acid group and a carboxyl group is arranged on the outer periphery of the polymer particle body can be used. When applying,
Usually, it takes the form of a dispersion or emulsion dispersed in an aqueous solvent.

The above-mentioned water-soluble polymer having a sulfonic acid group and a carboxyl group includes the above-mentioned water-soluble polymer having a sulfonic acid group and a carboxyl group.

The polymer particles having the above-mentioned water-soluble polymer having a sulfonic acid group and a carboxyl group disposed on the outer periphery thereof are mainly obtained by emulsion polymerization or suspension polymerization of a hydrophobic vinyl monomer in water. The prepared polymer particles are used.

Suitable vinyl monomers for obtaining these polymer particles include, for example, aromatic vinyl monomers such as styrene, α-methylstyrene, vinyltoluene and methoxystyrene; methyl acrylate, ethyl acrylate, Propyl acrylate (n, i), butyl acrylate (n, i)
s, t), 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate (n, i), butyl methacrylate (n, s, t), benzyl acrylate, benzyl methacrylate, hydroxy methacrylate, cyclohexyl Acrylic acid or methacrylic acid esters such as acrylates; Acrylic nitriles such as acrylonitrile; Monocarboxylic or dicarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid, or dicarboxylic anhydride Vinyl halides such as vinyl chloride and vinylidene chloride; vinyl esters such as vinyl acetate and vinyl benzoate; and conjugated dienes such as butadiene and isoprene, but are not limited thereto. .

In obtaining the polymer particles, other vinyl monomers, for example, a polyfunctional vinyl monomer can be used. As these polyfunctional vinyl monomers, for example, divinylbenzene, trivinylbenzene, diallyl phthalate, allyl acrylate, allyl methacrylate,
Examples include, but are not limited to, ethylene glycol diacrylate, ethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, trimethylolpropane triacrylate, and the like.

For obtaining the polymer particles, it is also preferable to use a vinyl monomer having a reactive group. Examples of these reactive vinyl monomers include epoxy group-containing vinyl monomers such as glycidyl acrylate and glycidyl methacrylate, and N-methylol acrylamide and the like.
-Methylol group-containing vinyl monomers, vinyloxazoline, oxazole group-containing vinyl monomers such as 2-propenyl-2-oxazoline, etc., 2-acrylic acid-4,6-dichloro-1,3,5-triazineamide, Examples thereof include, but are not limited to, triazine-based reactive vinyl monomers such as 2-acrylic acid-4,6-dichloro-1,3,5-triazine ester.

The conductive particles can be produced by polymerizing (copolymerizing) one or several hydrophobic vinyl monomers in an aqueous solvent in which the above water-soluble polymer is present. As the aqueous solvent, water is usually used, but an alcohol such as methanol, ethanol, or propanol, or a mixed solvent obtained by mixing an organic solvent compatible with water with water can also be used.

As the method of polymerizing (copolymerizing) the vinyl monomer, a general emulsion polymerization method, suspension polymerization method, dispersion polymerization method and the like can be used, but the emulsion polymerization method is preferable.

Specifically, a solution obtained by neutralizing a water-soluble polymer with sodium hydroxide in the above aqueous solvent is dissolved, the atmosphere in the reaction vessel is replaced with nitrogen gas, and a polymerization initiator is added to the solution. By dropping a vinyl monomer forming a polymer particle body into this system and performing polymerization at a temperature of 20 to 95 ° C.,
The conductive particles in the form of an emulsion are obtained.

In order to improve the conductivity of the conductive particles of the present invention, the mixing ratio of the water-soluble polymer in the conductive particles is determined by changing the mixing ratio of the water-soluble polymer to the weight of the monomer used for the polymer particles. The weight needs to be 35-500%, preferably 100-400%. In particular, in order to obtain excellent conductivity and adhesiveness, 200 to 300% is preferable.

The polymerization initiator can be dissolved in an aqueous solvent in advance, added dropwise at the same time as the monomer, or added after the monomer is added. What should I do? The polymerization reaction is preferably performed in an atmosphere containing no oxygen such as nitrogen gas.

Examples of the emulsion polymerization initiator include persulfates such as potassium persulfate and ammonium persulfate, peroxides such as hydrogen peroxide, 4,4'-azobis-4-cyanovaleric acid or a salt thereof, -Azobis (2-aminopropane)
An azobis compound such as hydrochloride can be used.
In addition, peroxides and persulfates can be used as redox initiators in combination with reducing agents such as ferrous chloride, ferrous sulfate, ammonium ferrous sulfate, and sodium thiosulfate.

The polymerization temperature of the emulsion polymerization varies depending on the initiator used, but is usually from 20 to 95 ° C. Redox polymerization using a redox initiator is carried out at a relatively low temperature, and a temperature of 20 to 50 ° C is suitable. 60-95 ° C when using peroxide or persulfate as an initiator
Is preferred.

In addition, inorganic substances such as sodium acetate, n-
A chain transfer agent such as dodecyl mercaptan can also be blended. For the purpose of accelerating the reaction, a reaction accelerator may be blended in the aqueous solvent. Examples of the reaction accelerator include ammonia, water, triethylamine, triethanolamine, and triethylammonium chloride.

Further, if necessary, the aqueous solvent
A surfactant for emulsion polymerization, a seed emulsion, and other water-soluble polymers may be blended within a range that does not affect the performance of the generated conductive particles.

As the surfactant for emulsion polymerization, higher fatty acid sulfonate, alkylbenzene sulfonate,
Examples include anionic surfactants such as higher alcohol sulfates, and nonionic surfactants such as polyethylene glycol and alkylphenol polyethylene glycol ether.

Examples of the seed emulsion include an acrylic emulsion, an acrylic / styrene emulsion and the like, and specifically, a styrene / butyl methacrylate / methacrylic acid copolymer emulsion and the like.

The present inventors have found that the outer periphery of the polymer particle body is
In the conductive particles in which the above-mentioned water-soluble polymer having a sulfonic acid group and a carboxyl group is arranged, the polymer particle body and the water-soluble polymer are not simply mixed but a part of the water-soluble polymer. It is presumed that they are in a state of being bonded to the polymer particle main body or in a state of being buried or embedded.

The present inventors have imagined that the conductive particles are in such an embodiment. However, they have found that the conductive particles are different from the state mixed with the present invention by the following operations. An attempt was made to separate the water-soluble polymer outside the polymer particles from the conductive particles in the form of an emulsion by extracting with hot water at a temperature at which the polymer particles did not fuse. Can only be separated and extracted,
No matter how long it took, the amount of extraction did not increase. Centrifugation of the conductive particle emulsion also resulted in little or no separation of the water-soluble polymer. Conversely, when a mixture of a latex polymerized with a surfactant and a water-soluble polymer was well mixed and subjected to extraction and centrifugation in the same manner as described above, the latex polymer particles and the water-soluble polymer were mixed. Was isolated as is.

When a polymer particle using a reactive vinyl monomer such as glycidyl acrylate is used, there is a possibility that the carboxyl group of the water-soluble polymer is bonded to the epoxy group of the polymer particle. In addition, since the bonding state may be developed even after the working liquid of the conductive particles is applied as a film, the use of the reactive vinyl monomer may reduce the adhesiveness and the permanent antistatic effect. Higher and preferred.

As described above, when a reactive vinyl monomer such as glycidyl acrylate is used to form the polymer particles, the carboxyl groups of the water-soluble polymer are superposed during the formation of the conductive particles. The reactive vinyl monomer may be bonded by the epoxy group of the coalesced particles, and the bonding state may be developed even after the working liquid of these conductive particles is applied as a film. The use of is preferred because the adhesiveness and permanent antistatic effect are further increased.

The particle size of the conductive particles is usually from 0.01 to
It is 2.0 μm, preferably 0.04 to 0.1 μm. However, in some cases, the particle size may not be clear, but even in this case, it is sufficient to achieve the object of the present invention.

The conductive particles are preferably used in an amount of not more than 20% by weight, more preferably not more than 1.0% of the added binder of the protective layer.

Hereinafter, a preparation example of the conductive particles will be described. —Preparation of Conductive Particles (A) — 700 parts of degassed distilled water is placed in a reaction vessel equipped with a stirrer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, and the water-soluble polymer (A) is added thereto. 250 parts were added with stirring to obtain an aqueous solution. Then, nitrogen gas was introduced through the above-mentioned nitrogen introducing pipe, and the inside of the reaction vessel was brought into a nitrogen gas atmosphere, and dissolved oxygen in the aqueous solution was eliminated. Thereafter, the aqueous solution was heated to 80 ° C. Styrene (St) is added to this aqueous solution.
90 parts, 10 parts of glycidyl methacrylate (GMA) and 100 parts of a 1% by weight aqueous solution of potassium persulfate are separately dropped, and a polymerization reaction is carried out at 80 ° C. under nitrogen gas reflux.
Conductive particles (water-soluble polymer (A): polymer particles = 25)
0: 100).

3. Metallic oxide-coated flat inorganic fine particles The flat inorganic fine particles are flake-like fine particles typified by mica or the like, and are not particularly limited as long as they have a large aspect ratio. The aspect ratio is preferably about 10 or more.

Further, as the flat inorganic fine particles, a particle size of 1
99.5% by volume percentage of fine particles less than 6 μm
Above are preferred.

The particle diameter and volume percentage of the flat inorganic fine particles are as follows:
Using a Coulter Multisizer manufactured by Coulter Co., Ltd., an aperture of 100 microns is measured by measuring 50,000 pieces.

[0102] As the metal oxide coating the surface of the flat inorganic particles, for _{example, SO-1 SiO 2 SO-} 2 TiO 2 SO-3 ZnO SO-4 SnO 2 SO-5 MnO 2 SO-6 Fe 2 O 3 _{SO-7 ZnSiO 4 SO-8} Al 2 O 3 SO-9 BeSiO 4 SO-10 Al 2 SiO 5 SO-11 ZrSiO 4 SO-12 CaWO 4 SO-13 CaSiO 3 SO-14 InO 2 SO-15 SnSbO 2 SO It includes _{-16 Sb 2 O 5 SO-17} Nb 2 O 5 SO-18 Y 2 O 3 SO-19 CeO 2 SO-20 Sb 2 O 3.

Of these, tin oxide is particularly preferred. Tin oxide may be, for example, a solid solution such as antimony.

The metal oxide-coated flat inorganic fine particles are preferably contained at a ratio of less than 0.1 g to 1 g of gelatin. More preferably 0.03 g to 0.09 g,
Most preferably, it is 0.06 to 0.09 g.

Examples of the above-mentioned metal oxide-coated flat inorganic particles are shown below. -Metallic oxide-coated flat inorganic fine particles (A)-Surface oxide-coated mica WK941 (manufactured by Otsuka Chemical Co., Ltd.) was classified using a laboratory zigzag classifier manufactured by Alpine, and the volume fraction of fine particles having a particle size of 16 μm or less was 0. 0.0% metal oxide coated flat inorganic particles (A)
I got

4. Polymer latex obtained from a polymerizable monomer having a fluorine atom As a polymerizable monomer having a fluorine atom that can be preferably used in the present invention (hereinafter also referred to as a fluorine-based monomer), the following general formulas (F1) and ( The compound represented by F2) is mentioned.

[0106]

Embedded image In the formula, R represents a hydrogen atom or a methyl group which may be substituted with a fluorine atom, Rf represents a linear, branched or cyclic alkyl group substituted with a fluorine atom, and this alkyl group is preferably a carbon atom The number is 1 to 10, and may be substituted by a group or atom other than a fluorine atom,
Examples of these groups or atoms include a hydroxy group, a halogen atom (eg, a chlorine atom, a bromine atom, etc.).

[0107]

Embedded image In the formula, R ¹ represents a hydrogen atom, a chlorine atom or an alkyl group having 1 to 3 carbon atoms, and R ² represents a monovalent substituent. R ² may be a group linked to each other to form a ring. R ^f represents an alkyl group having 1 to 30 carbon atoms in which at least one hydrogen atom is substituted by a fluorine atom, an aralkyl group, an aryl group or an alkylaryl group. X is a general formula

[0108]

Embedded imageRepresents a divalent linking group represented by
10 alkylene groups, arylene groups or aralkylene
Represents a group, -L- represents a -O- group, -S- group, -NR^Three-Group
(Here R^Three Represents an alkyl group having 1 to 4 carbon atoms. Less than
The same), -CO- group, -OCO- group, -SCO- group,-
CONR^Three-Group, -SO_Two-Group, -NR^ThreeSO_Two-Group, -S
O_TwoNR^Three-Group, represents a -SO- group,

[0109]

[Outside 1] Is 0 or 1. l is an integer of 0-4, preferably an integer of 0-2, m is an integer of 0-4, preferably 0 or 1, n is an integer of 1-5,
Particularly, 1 or 2 is preferable.

Next, examples of the fluorine-based monomer used in the present invention will be described.

[0111]

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[0112]

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[0113]

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[0114]

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[0115]

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The monomer copolymerizable with the polymerizable monomer having a fluorine atom is a compound having a vinyl group, for example, acrylates such as methyl acrylate, ethyl acrylate, butyl acrylate and cyclohexyl acrylate, methyl methacrylate, and the like. Ethyl methacrylate, cyclohexyl methacrylate,
Methacrylic esters such as sulfopropyl methacrylate; vinyl esters such as vinyl acetate and vinyl propionate; vinyl ethers such as methyl vinyl ether and butyl vinyl ether; vinyl ketones such as methyl vinyl ketone and ethyl vinyl ketone; styrene, methyl styrene and chloromethyl Examples thereof include styrenes such as styrene, acrylonitrile, vinyl chloride, vinylidene chloride, butadiene, isoprene and the like.

The copolymerization ratio of the polymerizable monomer having a fluorine atom to the copolymerizable monomer is preferably 3% or more by weight, and more preferably 5 to 80%.

As the polymerization (copolymerization) method, a general emulsion polymerization method, suspension polymerization method, dispersion polymerization method and the like are used.
Emulsion polymerization is preferred.

Specifically, a surfactant, a hydrophilic polymer and the like are dissolved in the above-mentioned aqueous solvent, the atmosphere in the reaction vessel is replaced with nitrogen gas, a polymerization initiator is added to the solution, and a fluorine-based monomer or A polymer obtained from a polymerizable monomer having a fluorine atom in the form of an emulsion (hereinafter, also referred to as a fluorine-based polymer) is obtained by dropping a fluorine-based monomer and a fluorine-based comonomer into this system and performing polymerization at a temperature of 20 to 95 ° C. Is obtained.

The polymerization initiator can be dissolved in an aqueous solvent in advance, added dropwise at the same time as the monomer, or added after the monomer is added. What should I do? The polymerization reaction is preferably performed in an atmosphere containing no oxygen such as nitrogen gas.

Examples of the emulsion polymerization initiator include persulfates such as potassium persulfate and ammonium persulfate, peroxides such as hydrogen peroxide, 4,4'-azobis-4-cyanovaleric acid or a salt thereof, -Azobis (2-aminopropane)
An azobis compound such as hydrochloride can be used.
In addition, peroxides and persulfates can be used as redox initiators in combination with reducing agents such as ferrous chloride, ferrous sulfate, ammonium ferrous sulfate, and sodium thiosulfate.

The polymerization temperature of the emulsion polymerization depends on the initiator used, but is usually from 20 to 95 ° C. Redox polymerization using a redox initiator is carried out at a relatively low temperature, and a temperature of 20 to 50 ° C is suitable. 60-95 ° C when using peroxide or persulfate as an initiator
Is preferred.

In addition, inorganic substances such as sodium acetate, n-
A chain transfer agent such as dodecyl mercaptan can also be blended. For the purpose of accelerating the reaction, a reaction accelerator may be blended in the aqueous solvent. Examples of the reaction accelerator include ammonia, water, triethylamine, triethanolamine, and triethylammonium chloride.

The surfactant used in the emulsion polymerization may be an anionic surfactant such as a higher fatty acid sulfonate, an alkylbenzene sulfonate, or a higher alcohol sulfate ether salt, or a nonionic surfactant such as polyethylene glycol or alkylphenol polyethylene glycol ether. A nonionic surfactant or the like can be used. As the hydrophilic polymer, gelatin, dextran-sulfate, and the above-mentioned water-soluble polymers can be used.

The following is an example of the synthesis of the above-mentioned fluoropolymer latex. -Synthesis of Fluoropolymer Latex (A)-Distilled water 36 degassed with 1 liter of Kolben with nitrogen gas
0 ml and 4.5 g of hydrophilic polymer (SP-4)
Raise the temperature to 0 ° C. 0.50 g of ammonium persulfate dissolved in 5 ml of distilled water was quickly added thereto, and 50 g of a polymerizable monomer (F) -1 (where n = 4) having a fluorine atom, 40 g of styrene, and 0.1 g of acrylic acid were added.
5 g of the mixture was added dropwise in about 1 hour,
Stir for hours. 0.2 g of ammonium persulfate was added and further cooled to room temperature to obtain the desired fluoropolymer latex (A). The average particle size of the obtained latex was about 0.2 μm. -Synthesis of fluoropolymer latex (B)-Distilled water 36 degassed with nitrogen gas in 1 liter of corben
0 ml, 4.5 g of the hydrophilic polymer (SP-4) and 4.5 g of the hydrophilic polymer (SP-2) are added, and the temperature is raised to 80 ° C. To this, 0.50 g of ammonium persulfate dissolved in 5 ml of distilled water was quickly added, and a polymerizable monomer (F) -1 (where n = 4) having a fluorine atom was added thereto.
g and 40 g of styrene are dropped in about 1 hour, and after the dropping is completed, the mixture is further stirred for 3 hours. 0.2 g of ammonium persulfate was added and further cooled to room temperature to obtain the desired fluoropolymer latex (B). The average particle size of the obtained latex was about 0.2 μm. -Synthesis of fluoropolymer latex (C)-Distilled water 36 degassed with 1 liter of corben with nitrogen gas
0 ml and 4.5 g of hydrophilic polymer (SP-4)
Raise the temperature to 0 ° C. 0.50 g of ammonium persulfate dissolved in 5 ml of distilled water was quickly added thereto, and a mixture of 20 g of a polymerizable monomer (F) -1 (where n = 14) having a fluorine atom and 70 g of styrene was added to about 1 g.
After the addition, the mixture is further stirred for 3 hours. 0.2 g of ammonium persulfate was added, and further cooled to room temperature to obtain the desired fluoropolymer latex (C). The average particle size of the obtained latex was about 0.2 μm. -Synthesis of Fluoropolymer Latex (D)-Distilled water 36 degassed with 1 liter of Kolben with nitrogen gas
0 ml and 4.5 g of sodium lauryl sulfate.
Heat to ° C. 0.50 g of ammonium persulfate dissolved in 5 ml of distilled water was quickly added thereto, and a polymerizable monomer (F) -1 having a fluorine atom was added thereto (however,
n = 4) 50 g, styrene 40 g, acrylic acid 0.5 g
Is added dropwise in about 1 hour, and after the addition is completed, the mixture is further stirred for 3 hours. 0.2 g of ammonium persulfate was added and further cooled to room temperature to obtain the desired fluoropolymer latex (D). The resulting latex has an average particle size of about 0.1.
It was 2 μm.

The preferred range of the additive amount for controlling the dielectric constant is preferably 20% by volume or less, more preferably 2.0 to 2.0% by volume, based on the binder of the layer to be added.
10.0% by volume.

Information recording materials having a photosensitive silver halide emulsion layer include black-and-white silver halide photographic materials such as black-and-white films for photography, photosensitive materials for printing, and X-ray films as silver halide photographic materials. It can be a color silver halide photographic material such as a negative color roll film, a negative color cut film, a positive color roll film, a positive color cut film, and the like.

The silver halide in the light-sensitive silver halide emulsion layer is used for ordinary silver halide emulsions such as silver bromide, silver chloride, silver iodobromide, silver chlorobromide and silver chloroiodobromide. Silver halide can be optionally used.

When used as a photosensitive material for printing, preferred silver halides are silver chloride, silver chlorobromide containing 60 mol% or more of silver chloride, and silver chloroiodobromide containing 60 mol% or more of silver chloride. .

As the silver halide emulsion, those obtained by any method such as an acid method, a neutral method and an ammonia method can be used.

The silver halide grains may have a uniform silver halide composition distribution within the grains, or may be core / shell grains having different silver halide compositions between the inside of the grains and the surface layer. The particles may be mainly formed inside the particles.

As the silver halide grains, grains having a single shape may be used, or grains having various shapes may be mixed. Further, those having any particle size distribution may be used, and a polydisperse emulsion or a monodisperse emulsion may be mixed and used.

The silver halide emulsion is preferably a monodisperse emulsion, and the silver halide contained within a grain size range (coefficient of variation) of ± 20% around the average grain size r is 60% of the total silver halide. %, More preferably 70% or more of the total silver halide, and even more preferably 80% or more of the total silver halide. In addition, the particle size referred to here is the diameter of a spherical silver halide particle, and the diameter of a non-spherical particle when the projected image is converted into a circular image of the same area. It is. A photographic image in which the particle diameters are highly uniform can be obtained.

Monodispersed emulsions are described in JP-A-55-48521, JP-A-58-49938 and JP-A-60-1229.
It can be obtained with reference to the method described in the specification such as JP-A-35.

The shape of the silver halide grains is not limited.
The shape may be flat, spherical, cubic, tetrahedral, octahedral, or any other shape. For example, JP-A-5-20407
The tabular grains obtained by the method described in JP-A No. 0 can be used.

In producing a silver halide emulsion,
As a method of reacting a soluble silver salt and a soluble halogen salt, any of a one-side mixing method, a simultaneous mixing method, a combination thereof and the like can be used.

It is also possible to use a method of forming silver halide grains in the presence of excess silver ions (so-called reverse mixing method). A method of maintaining a constant pAg in a liquid phase in which silver halide is formed, as one type of the double jet method;
A so-called controlled double jet method can be used. According to this method, a silver halide emulsion having a regular crystal form and a nearly uniform grain size can be obtained.

A cadmium salt in at least one of the steps of forming or growing silver halide grains;
It is preferable to add a zinc salt, a lead salt, a thallium salt, an iridium salt, a rhodium salt, or a complex salt containing these elements.

For details of the silver halide emulsion and its preparation method, see Research Disclosure 1764.
3, pages 22 to 23 (December 1978) or in the literature cited.

As the silver halide emulsion, a so-called "primitive" emulsion which is not subjected to chemical sensitization can be used as it is, but it is usually preferable to perform chemical sensitization.

Various photographic additives can be used in the silver halide emulsion before and after physical ripening or chemical ripening. The compound used in such a step is, for example, Research Disclosure (RD) 1764
3, 18716 and 308119 (December 1989
Month).

The photographic additives described in these three Research Disclosures and their locations are listed in Table 1.

[0143]

[Table 1]

The photographic additives that can be used are also described in Product Licensing Magazine (Product L).
eicensing) 92 Vol. 107-110 (Dec. 1978)
Month) can also be referred to.

In the photosensitive material for printing, a silver halide emulsion layer or a non-photosensitive layer contains a high-contrast agent or a high-contrast process in the developing process in order to enhance the dot quality. Examples of excellent contrast agents include hydrazine compounds and tetrazonium compounds. Representative examples of these are described below, but are not limited thereto.

[0146]

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[0147]

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[0148]

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[0149]

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[0150]

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[0151]

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[0152]

Embedded image In a photosensitive material for printing, a silver halide emulsion layer and an emulsion protective layer are usually provided on at least one layer on one side of a support, and a back coat layer having a certain function and a protective layer are provided on the opposite side. Each layer has at least one
It is provided layer by layer. The number of these silver halide emulsion layers and backcoat layers is not particularly limited.

Gelatin is mainly used as a binder for the emulsion layer, protective layer, intermediate layer, back coat layer and the like constituting the silver halide photographic light-sensitive material. As the gelatin to be used, there are lime-treated, acid-treated and enzyme-treated gelatin, and those subjected to calcium removal treatment, inertization treatment, inactivation treatment and the like can also be used. Derivative gelatin such as phthalated gelatin can also be used.
Other water-soluble substances can be mixed in the gelatin binder. For example, sodium styrenesulfonate polymer or copolymer with other monomers, poly-N-vinylpyrrolidone, maleic anhydride copolymer, polyacrylamide and its derivatives, polyacrylic acid and its derivatives and copolymerization Products, casein, albumin, carboxymethylcellulose, hydroxyethylcellulose, synthetic products such as sodium alginate, processed natural products, and the like. Further, the polymer latex described in U.S. Pat. No. 3,411,911 can be contained in the photographic component layer.

A function can be imparted to each layer of the back coat layer. For example, functionalized layers include a conductive layer (antistatic layer), an antihalation layer,
There are an irradiation prevention layer and a magnetic recording layer. These layers may be adjacent to the undercoat layer or on the surface, or the layers may be present at any position depending on the purpose.

In a silver halide photographic light-sensitive material, it is important to balance the curl between the light-sensitive layer side and the back coat layer side. Therefore, the ratio of the binder such as gelatin on the back coat layer side to the hydrophilic polymer such as gelatin on the photosensitive layer side (back layer / photosensitive layer side) is preferably 0.1 or more in terms of weight ratio. 0.32 to 1.50 are particularly preferred.

This ratio depends on the material and thickness of the photographic support of the silver halide photographic light-sensitive material, the total amount of hydrophilic polymers such as gelatin, the amount of silver, and the amount of other additives (eg, polymer latex). It is determined by the design of the curl balance of the silver halide photographic material, the developing speed during the developing process, the drying speed after the process, and the like.

The back layer has various functions.

In order to provide the back coat layer with a function of preventing sharpness halation and anti-irradiation of the image of the silver halide photographic light-sensitive material, the corresponding anti-halation dye described in the section of the dye of Research Disclosure is used. And anti-irradiation dyes.

In order to provide the function of preventing the photosensitive layer of the silver halide photographic material from sticking to the back coat layer, the matting agent and the slipping agent of the above-mentioned Research Disclosure can be used appropriately. The shape and particle size of the matting agent are not limited, but a spherical matting agent having an average particle size of 10 μm or more and 50 μm or less can also be used.

As the slipping agent, the following can be used as typical examples in addition to the above research disclosure. For example, US Pat. No. 3,042,
No. 522, British Patent No. 955,061,
U.S. Pat. Nos. 3,080,317 and 4,00
No. 4,927, No. 4,047,958, No. 3,489,576, British Patent No. 1,
No. 143,118, JP-A-60-140341 and the like.
54,043, 2,732,305, 2,976,148, 3,20
No. 6,311, German Patent Nos. 1,284,295, 1,284,294, etc., higher fatty acid-based, alcohol-based, acid amide-based slip agents, and British Patent No. 1,263,722, U.S. Pat.
No. 3,516,765, U.S. Pat. Nos. 2,588,765 and 3,121,060.
Ester-type and ether-type slip agents described in U.S. Pat. No. 3,198,387 and the like.
Examples thereof include taurine-based slip agents described in JP-A Nos. 502,437 and 3,042,222.

The development process is described in the Journal of
The American Chemical Society (JournaI of
the American Chemical Society) Vol. 73, No. 3, 1
Known developers described on page 00 (1951) can be used. The photosensitive material for printing can be developed by the processing described in, for example, JP-A-5-123292 and JP-A-53-17719.

Further, as for the photosensitive material for medical use, see
What is described in -138479 is used preferably, However, It is not limited in particular to these.

Next, the case where the information recording material of the present invention is a magnetic recording medium will be described.

A magnetic recording medium is provided with a magnetic recording layer. The magnetic recording layer can be formed by applying, orienting, and drying a magnetic paint in which ferromagnetic fine powder is kneaded and dispersed in a binder, an additive, a solvent, and the like.

As the binder (binder) for the magnetic recording layer, conventionally known thermoplastic resins, thermosetting resins, reactive resins, and mixtures thereof are used.

Further, as the ferromagnetic fine powder, ferromagnetic iron oxide, ferromagnetic chromium dioxide, ferromagnetic alloy powder and the like can be used.

The magnetic recording medium of the present invention can be provided with various layers used for the magnetic recording medium in addition to the magnetic recording layer.

When the information recording material of the present invention is another information recording material, for example, a recording material for various printers such as an OHP film and an ink jet, various public layers are provided in these.

[0169]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples. Example 1 [Preparation of photographic support] <Preparation of undercoat layers A-1 and B-1> Both surfaces of a commercially available 100 μm polyethylene terephthalate (PET) film were subjected to a corona discharge treatment of 8 W · min / m ^2. On one side, the following undercoating liquid a-1 was applied so as to be 10 ml / m ² , and dried at 100 ° C. for 1 minute to obtain an undercoating layer A-1. Further, 10 m of the undercoat liquid b-1 was applied to the surface opposite to the undercoat layer A-1.
1 / m ² , dried at 100 ° C for 1 minute,
An undercoat layer B-1 was obtained.

<< Preparation of Undercoat Liquid a-1 >> A copolymer latex liquid (solid content: 30% by weight of butyl acrylate, 20% by weight of t-butyl acrylate, 25% by weight of styrene and 25% by weight of 2-hydroxyethyl acrylate) (Minute 30%) 270 g (C-1) 0.6 g Hexamethylene-1,6-bis (ethyleneurea) 0.8 g Make up to 1 liter with water.

<< Preparation of Undercoat Liquid b-1 >> 270 g of a copolymer latex liquid (solid content 30%) of butyl acrylate 40% by weight, styrene 20% by weight and glycidyl acrylate 40% by weight (C-1) 0.6 g Hexamethylene-1,6-bis (ethylene urea) 0.8 g Make up to 1 liter with water.

<Preparation of Undercoat Layers A-2 and B-2> A corona discharge of 8 W · min / m ² was applied to each of the undercoat layers A-1 and B-1 to obtain the following undercoat liquid a- 2 was applied at 10 ml / m ² and dried at 100 ° C. for 1 minute to obtain undercoat layers A-2 and B-2.

<< Preparation of Undercoat Liquid a-2 >> Gelatin 10 g (C-1) 0.2 g (C-2) 0.2 g (C-3) 0.1 g (CF) 0.1 g Average particle size : Silica particles of 3 μm 0.1 g Finish 1 liter with water.

[0174]

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[Preparation of Photographic Material Sample for Printing] On a subbing layer A-2 of a photographic support, an emulsion layer coating solution of the following formula 1 was prepared in the following manner: silver amount 2.9 g / m ² , gelatin amount 1 0.2 g / m ^2, and an emulsion protective layer coating solution of the following formula 2 was simultaneously coated thereon so that the gelatin amount was 0.75 g / m ² . On the other side of the undercoat layer B-2, a back layer coating solution having the following formulation 3 was coated with a gelatin having a gelatin content of 0.6.
g / m ^2, and a back layer protective layer coating solution of the following formula 4 was simultaneously and multi-layer coated thereon such that the amount of gelatin was 0.75 g / m ² , thereby preparing a photographic light-sensitive material sample for printing. No. 1-1 to 1-16 were obtained.

<< Prescription 1, Composition of Emulsion Layer >> Silver halide emulsion Silver amount 2.9 g / m ² (C-5) Sensitizing dye 0.6 mg / m ² (H-7) hydrazine compound 30 mg / m ² ( C-6) Amino compound 50 mg / m ² (C-7) Surfactant 100 mg / m ² (C-8) Latex polymer 1.0 g / m ² (C-9) Hardener 30 mg / m ² Sodium-isoamyl -n- decyl sulfosuccinate 0.7 mg / m ² 2-mercapto-6-hydroxy purine ^{10mg / m 2 EDTA 50mg / m} 2

<< Prescription 2, Composition of Emulsion Protective Layer >> Gelatin 0.75 g / m ² Sodium-isoamyl-n-decylsulfosuccinate 12 mg / m ² Matting agent: 25 mg / m monodisperse silica having an average particle size of 3.5 μm ² (C-10) Hardener 30 mg / m ² (C-11) Surfactant 1 mg / m ² Additive for emulsion protective layer shown in Table 2 Table 2

<< Formulation 3, Composition of Back Layer >> Gelatin 0.6 g / m ² sodium-isoamyl-n-decylsulfosuccinate 5 mg / m ² (C-8) latex polymer 0.3 g / m ² colloidal silica (average) Particle size 0.05 μm) 70 mg / m ² Sodium polystyrene sulfonate 20 mg / m ² (C-12) Hardener 100 mg / m ²

<< Formulation 4, Composition of Backing Layer Protective Layer >> Gelatin 0.75 g / m ² Matting agent: monodispersed polymethyl methacrylate 50 mg / m ² having an average particle size of 5 μm ² sodium di (2-ethylhexyl) sulfosuccinate 10 mg / m ² (C-11) Surfactant 1 mg / m ² (C-13) Dye 20 mg / m ² H- (OCH ₂ CH ₂ ) ₆₈ -OH 50 mg / m ² (C-10) Hardener 15 mg / m ² Polysiloxane 0.7 g / m ² Back layer protective layer additive shown in Table 2

[0180]

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[0181]

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The obtained printing photographic material sample No. 1
About -1 to 1-16, transportability was evaluated as follows. [Evaluation method] <Evaluation of transportability> Each of the obtained samples was subjected to a development process described below, and then each film was subjected to a temperature of 23 ° C and a humidity of 15% RH for 2 hours.
After adjusting the humidity for an hour, the auto feeder (K
(Manufactured by DAF-500 Konica) and transported. The transportability was evaluated based on how many times two of the 1000 sheets were transported and transported. Table 2 shows the obtained results. Table 2 shows the dielectric constant of the support, the dielectric constant of the emulsion protective layer, the dielectric constant of the back layer protective layer, the difference between the dielectric constant of the emulsion protective layer and the dielectric constant of the support, and the dielectric constant of the back layer protective layer. The difference between the dielectric constant of the support and that of the support is also shown.

<< Processing such as Development >> Using a developing solution and a fixing solution having the following compositions, processing was carried out under the following developing conditions. <Development processing conditions> (Process) (Temperature) (Time) Development 38 ° C for 12 seconds Fixing 35 ° C for 10 seconds Washing 40 ° C for 10 seconds Drying 50 ° C for 12 seconds Total of 44 seconds

<Composition of developer> Amount per 1 liter of each use Diethyltriamine pentaacetic acid / pentasodium salt 3 g Sodium sulfite 50 g Potassium carbonate 40 g Hydroquinone 21 g 4-methyl-4-hydroxymethyl-1-phenyl 0.9 g -3- Pyrazolidone (dimesone S) Potassium bromide 5 g Benzotriazole 0.2 g 5-methyl-benzotriazole 0.13 g Boric acid 8 g Diethylene glycol 40 g 2-mercapto-6-hydroxypurine 0.06 g Water and sodium hydroxide are added to make 1 liter. Adjust to pH 10.2.

<Composition of Fixing Solution> Amount per liter of working solution Ammonium thiosulfate (70% aqueous solution) 200 ml Sodium sulfite 22 g Boric acid 9.8 g Sodium acetate trihydrate 34 g Acetic acid (90% aqueous solution) 14.5 g Tartaric acid 0 g Aluminum sulfate (27% aqueous solution) 25 ml The pH of the working solution was 4.9.

[0186]

[Table 2] Water-soluble polymer (A): Water-soluble polymer (A) described above Conductive particles (A): Conductive particles (A) described above Flat plate fine particles (A): Metal oxide coating described above Latex (A): Fluoropolymer latex (A) described above Latex (D): Fluoropolymer latex (D) described above

Table 2 shows that the transportability is improved when the dielectric constant of the outermost layer on either side of the support is higher than the support by 5 (esu) or more.

Example 2 The emulsion protective layer coating solution of Formula 2 and the back layer protective layer coating solution of Formula 4 in Example 1 were replaced with the emulsion protective layer coating solution of Formula 2 and the back layer protective layer coating solution of Formula 4, respectively. In the same manner as in Example 1 except that 2-
1-2-7 were obtained. << Prescription 2, composition of emulsion protective layer >> Gelatin 0.75 g / m ² sodium-isoamyl-n-decylsulfosuccinate 12 mg / m ² Matting agent: monodisperse silica having an average particle diameter of 3.5 μm 25 mg / m ² (C -10) Hardener 30 mg / m ² (C-11) Surfactant 1 mg / m ² Emulsion protective layer additive shown in Table 3

<< Formulation 4, Composition of Backing Layer Protective Layer >> Gelatin 0.75 g / m ² Matting agent: monodispersed polymethyl methacrylate 50 mg / m ² having an average particle size of 5 μm ² sodium di (2-ethylhexyl) sulfosuccinate 10 mg / m ² (C-11) Surfactant 1 mg / m ² (C-13) Dye 20 mg / m ² H- (OCH ₂ CH ₂ ) ₆₈ -OH 50 mg / m ² (C-10) Hardener 15 mg / m ² Polysiloxane 0.7 g / m ²

The obtained photographic light-sensitive material sample for printing no. 2
About -1 to 2-7, the static mark was evaluated as follows.

[Evaluation Method] <Evaluation of Static Mark> The obtained unexposed sample was humidified at a temperature of 23 ° C. and a humidity of 20% RH for 24 hours, and under a humidified atmosphere with a neoprene rubber roller and a chrome roller. After each friction, the developing process described in Example 1 was performed. The obtained film was visually observed, and static marks were evaluated according to the following evaluation criteria. Table 3 shows the obtained results. Table 3 also shows the dielectric constant of the support, the dielectric constant of the emulsion protective layer, and the difference between the dielectric constant of the emulsion protective layer and the dielectric constant of the emulsion layer. [Evaluation Criteria] 4: No static mark is generated at all 3: Static mark is generated slightly Static mark is generated at an intermediate level between 2: 1 and 3: 1: Static mark is generated over the entire surface

[0192]

[Table 3]

Flat plate fine particles (A): Metal oxide-coated flat plate inorganic fine particles (A) Latex (B): Fluorine-based polymer latex (B) Latex (C): Fluorine described above Polymer latex (C)

As can be seen from Table 3, no static mark was generated when the dielectric constant of the non-photosensitive layer located farther from the support than the photosensitive silver halide layer was higher than that of the photosensitive silver halide layer. You can see that.

Example 3 << Preparation of Emulsion >> -Preparation of Emulsion Em-1- Using a mixing stirrer described in Japanese Patent Publication No. 58-58288, the B1 solution and the C1 solution were added to the A1 solution at 35.degree.
0 ml was added in 2.0 minutes by the double jet method to form nuclei.

After the addition of the B1 solution and the C1 solution was completed, the temperature of the A1 solution was raised to 60 ° C. over 60 minutes, the whole amount of the D1 solution was added, the pH was adjusted to 5.5 with a 3% aqueous KOH solution, and the B1 solution was added again.
Solution 1 and Solution C1 were added at a rate of 55.4 ml / min.
Added for 2 minutes. During this period, the silver potential (measured with a silver ion selective electrode using a saturated silver-silver chloride electrode as a reference electrode) was controlled to +8 mV and +30 mV using the E1 solution.

After the addition was completed, the pH was adjusted to 6.0 with a 3% aqueous KOH solution, and immediately after desalting and washing, a seed emulsion was obtained.
Observation of this seed emulsion by an electron microscope revealed that 90% or more of the total projected area of the silver halide grains consisted of hexagonal tabular grains having a maximum adjacent side ratio of 1.0 to 2.0, and the average thickness of the hexagonal tabular grains was Is 0.090 μm and the average equivalent circle diameter is 0.
It was 510 μm.

The obtained seed emulsion was heated to 53 ° C., and the spectral sensitizing dye A (5,5′-dichloro-9-ethyl-3,3′-di- (3-sulfopropyl) oxacarbocyanine sodium salt anhydrous Product) 450 mg, spectral sensitizing dye B (5,
8 mg of 5'-di- (butoxycarbonyl) -1,1'-di-ethyl-3,3'-di- (4-sulfobutyl) benzimidazolocarbocyanine sodium) as a dispersion of solid fine particles. After the addition, 60 mg of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene (TAI), 15 mg of adenine, 50 mg of ammonium thiocyanate, 2.5 mg of chloroauric acid and 5.0 mg of sodium thiosulfate were added. Aqueous solution, a silver iodide fine grain emulsion (average particle size: 0.05 μm) equivalent to 5 mmol, and a dispersion of 6.0 mg of triphenylphosphine selenide were added, and ripening was performed for a total of 2 hours and 30 minutes. At the end of ripening, 750 mg of TAI was added as a stabilizer to prepare an emulsion Em-1 comprising tabular silver iodobromide grains.

The dispersion of the solid fine particles of the spectral sensitizing dyes A and B was prepared by adding the dyes to water at 27 ° C., and using a high-speed stirrer (dissolver) for 3500 rpm. p. m. For 30 to 120 minutes. Further, the dispersion of triphenylphosphine selenide is a triphenylphosphine selenide 120.
g in 30 kg of ethyl acetate at 50 ° C. and stirred,
Completely dissolve, while 3.8 kg of gelatin is
kg, and 93 g of a 25% by weight aqueous solution of sodium dodecylbenzenesulfonate was added thereto. The two liquids were mixed, and the mixture was mixed at 50 ° C. with a blade speed of 40 m / h by a high-speed stirring type disperser having a 10 cm diameter dissolver. 30 seconds
The mixture was dispersed for 1 minute, and then quickly depressurized to remove ethyl acetate with stirring until the residual concentration of ethyl acetate became 0.3% by weight or less, diluted with pure water, and finished to 80 kg.

(A1 solution) Ossein gelatin 24.2 g Water 9657 ml HO (CH ₂ CH ₂ O) n [CH (CH ₃ ) CH ₂ O] ₁₇ (CH ₂ CH ₂ O) nH (n + m = 5 to 7) 10% methanol solution 1.20 ml Potassium bromide 10.8 g 10% nitric acid 160 ml (B1 solution) 2.5N silver nitrate aqueous solution 2825 ml (C1 solution) Potassium bromide 841 g Water 2825 ml (D1 solution) Ossein gelatin 121 g Water 2040 ml HO ( _{CH 2 CH 2 O) n [} CH (CH 3) CH 2 O] 17 (CH 2 CH 2 O) mH (n + m = 5~7) 10% methanol solution 5.70ml (E1 solution) 1.75 n potassium bromide Aqueous solution silver potential control amount

—Preparation of Emulsion Em-2— The solution A2 was vigorously stirred in a reaction vessel while maintaining the temperature at 55 ° C., and half of each of the solutions B2 and C2 was added over 35 minutes by a double jet method. During this time, the pH was kept at 5.8. The pH was adjusted to 8.8 with a 1% aqueous KOH solution,
Solution C2 and solution D2 were added by a double jet method until solution D2 disappeared. The pH was adjusted to 6.0 with a 0.3% aqueous citric acid solution, and the remaining amounts of the B2 solution and the C2 solution were added by a simultaneous mixing method over 25 minutes. During this time, the pAg was kept at 8.9. In addition,
The addition rates of the B2 liquid and the C2 liquid were changed in a function according to the critical growth rate to suppress the generation of small particles and polydispersion due to Ostwald ripening.

After completion of the addition, desalting, washing and redispersion were carried out in the same manner as in Em-1, and after redispersion, the pH was adjusted to 5.80 at 40 ° C.
The pAg was adjusted to 8.2.

When the obtained silver halide emulsion was observed with an electron microscope, the average circle-equivalent diameter was 0.91 μm.
Average thickness 0.23 μm, average aspect ratio about 4.0, width of particle size distribution (standard deviation of particle size distribution / average particle size)
The emulsion was composed of 5% of tabular silver halide grains.

The obtained emulsion was heated to 47 ° C., and 390 mg of spectral sensitizing dye A and 4 mg of spectral sensitizing dye B, equivalent to 5 mmol of a silver iodide fine grain emulsion (average grain size: 0.05 μm), were obtained as solid fine particle dispersion. After addition, adenine 10 mg,
Ammonium thiocyanate 50mg, chloroauric acid 2.0m
g and an aqueous solution containing 3.3 mg of sodium thiosulfate, and a dispersion of 4.0 mg of triphenylphosphine selenide were added, followed by aging for a total of 2 hours and 30 minutes. At the end of ripening, 750 mg of TAI was added as a stabilizer to prepare an emulsion Em-2 comprising tabular silver iodobromide grains.

(A2 solution) Ossein gelatin 19.04 g HO (CH ₂ CH ₂ O) n [CH (CH ₃ ) CH ₂ O] ₁₇ (CH ₂ CH ₂ O) nH (n + m = 5-7) 10% Methanol solution 1.20 ml Potassium iodide 7.00 g Em-1 1.55 mol equivalent Make up to 2800 ml with water. (B2 solution) Potassium bromide 1493g Make up to 3585ml with water. (C2 solution) Silver nitrate 2131 g Make up to 3585 ml with water. (D2 solution) Fine grain composed of 3% by weight of gelatin and silver iodide grains (average grain size: 0.05 μm) Emulsion (*) Equivalent to 0.028 mol Emulsion (*); contains 0.06 mol of potassium iodide 5.0
An aqueous solution containing 7.06 mol of silver nitrate and an aqueous solution containing 7.06 mol of potassium iodide were added to 6.641 wt% aqueous gelatin solution over 10 minutes. During the fine particle formation, the pH was controlled at 2.0 using nitric acid, and the temperature was controlled at 40 ° C. After the formation of the particles, the pH was adjusted to 6.0 using an aqueous solution of sodium carbonate. —Preparation of Emulsion— The prepared Em-1 and Em-2 are each in a weight ratio of 6: 4.
Was prepared.

<< Preparation of Subbed Support >> Concentration: 0.17
Polyethylene terephthalate for X-rays colored blue to 0
On both sides of the base (thickness 175 μm),
min / m^Two After applying the corona discharge treatment of
The film thickness of the latex liquid (L-2) after drying becomes 0.2 μm
And the following undercoat latex liquid (L-1)
In order so that the film thickness after drying becomes 0.053 μm
Coated and dried at 123 ° C. for 2 minutes.

[0207]

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Undercoat latex liquid (L-2) A copolymer latex liquid containing 10% by weight of n-butyl acrylate, 35% by weight of t-butyl acrylate, 27% by weight of styrene and 28% by weight of 2-hydroxyethyl acrylate (solid content: 30%) %).

<< Sample No. Creation of 3-1 to 3-9 >>
Crossover of the following formulation on both sides of the subbed support
Cut layer, emulsion layer, intermediate layer, protective layer (each side
The following shows the prescription. ) The crossover cut layer, emulsion
Layer, intermediate layer, protective layer in the order of 1.8 silver on one side
g / m^Two, Protective layer gelatin amount 0.4g / m^Two, Middle layer zera
Tin amount 0.4g / m^Two1.5 g of emulsion layer gelatin /
m^Two , Crossover cut layer gelatin amount 0.2g / m^Two
And dried to obtain a sample No. 3-1 to 3-
9 was created.

First Layer (Crossover Cut Layer) Solid Fine Particle Dispersion Dye (AH) 180 mg / m ² Gelatin 0.2 g / m ² Sodium Dodecylbenzenesulfonate 5 mg / m ² Compound I 5 mg / m ² Latex L 2 g / m ² 2,4-dichloro-6-hydroxy-1,3,5-triazine sodium salt 5 mg / m ² Colloidal silica (average particle size 0.014 μm) 10 mg / m ² Hardener A 2 mg / m ²

Second layer (emulsion layer) Silver halide emulsion layer Silver amount 1.8 g / m^Two Compound G 0.5 mg / m^Two 2,6-bis (hydroxyamino) -4-diethylamino-1,3,5-triazine 5 mg / m^Two t-butyl-catechol 130 mg / m^Two Polyvinylpyrrolidone (average molecular weight 10,000) 35 mg / m^Two Styrene-maleic anhydride copolymer 80mg / m^Two Sodium polystyrene sulfonate 80mg / m^Two Trimethylolpropane 350mg / m^Two Diethylene glycol 50mg / m^Two Nitrophenyl-triphenyl-phosphonium chloride 20mg / m^Two Ammonium 1,3-dihydroxybenzene-4-sulfonate 500mg / m^Two Sodium 2-mercaptobenzimidazole-5-sulfonate 5mg / m^Two Compound H 0.5 mg / m^Two n-C _FourH₉OCH_TwoCH (OH) CH_TwoN (CH_TwoCOOH)_Two 350mg / m^Two Compound M 5 mg / m^Two Compound N 5 mg / m^Two Colloidal silica 0.5g / m^Two Latex L 0.2g / m^Two Dextrin (average molecular weight 1000) 0.2 g / m^Two Compound P 0.2 g / m^Two Compound Q 0.2 g / m^Two

Third layer (intermediate layer) Gelatin 0.4 g / m ² formaldehyde 10 mg / m ² 2,4-dichloro-6-hydroxy-1,3,5-triazine sodium salt 5 mg / m ² bis-vinylsulfonylmethyl Ether 18 mg / m ² Latex L 0.05 g / m ² Sodium polyacrylate 10 mg / m ² Compound S-1 3 mg / m ² Compound K 5 mg / m ² Hardener B 1 mg / m ²

Fourth layer (protective layer) Gelatin 0.4 g / m ² matting agent (polymethyl methacrylate having an area average particle size of 7.0 μm) 50 mg / m ² formaldehyde 10 mg / m ² 2,4-dichloro-6-hydroxy -1,3,5-triazine sodium salt 5 mg / m ² bis - vinylsulfonyl methyl ether 18 mg / m ² latex L 0.1 g / m ² polyacrylamide (average molecular weight 10000) 0.05g / m ² of sodium polyacrylate 20mg / M ² Polysiloxane S1 20 mg / m ² Compound I 12 mg / m ² Compound J 2 mg / m ² Compound S-1 7 mg / m ² Compound K 15 mg / m ² Compound O 50 mg / m ² Compound S-2 5 mg / m ² C ₉ F ₁₉ O (CH ₂ CH ₂ O) ₁₁ H 3 mg / m ² C ₈ F ₁₇ SO ₂ N- (C ₃ H ₇ ) (CH ₂ CH ₂ O ) ₁₅ H 2 mg / m ² C ₈ F ₁₇ SO ₂ N- (C ₃ H ₇ ) (CH ₂ CH ₂ O) ₄ (CH ₂ ) ₄ SO ₃ Na 1 mg / m ² Hardener B 1.5 mg / m protective layer additives table shown in table ² 4 4 wherein the amount of

[0214]

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[0215]

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[0216]

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The photographic photosensitive material sample No. 3
About -1 to 3-9, the transportability was evaluated as follows. [Evaluation method] <Evaluation of transportability> Each of the obtained samples was subjected to an automatic developing machine SRX-503 using an SR-DF processing solution (manufactured by Konica Corporation).
Dry Toe at a developing temperature of 35 ° C with [Konica Corporation]
After performing development processing described below after performing processing in dry 45 seconds,
Each film was humidified at a temperature of 23 ° C. and a humidity of 15% RH for 2 hours, and an auto feeder (KDAF-
500 Konica) and transported. 10
The transportability was evaluated depending on how many times two of the 00 sheets were transported and transported. Table 4 shows the obtained results. Table 4 shows the dielectric constant of the support, the dielectric constant of the emulsion protective layer,
The difference between the dielectric constant of the emulsion protective layer and the dielectric constant of the support is also shown.

[0218]

[Table 4] Water-soluble polymer (A): Water-soluble polymer (A) as described above. Flat fine particles (A): Flat inorganic fine particles coated with metal oxide (A) as described above. Latex (B): Fluorine as described above. Polymer latex (B) Latex (C): Fluorine polymer latex (C) described above

From Table 4, it can be seen that, even in an information recording material having at least two layers on both sides of the support, the dielectric constant of the outermost layer is 5 (esu) or more higher than that of the support. It can be seen that the transportability is improved.

Example 4 In the same manner as in Example 3 except that the protective layer of Example 3 was replaced with a protective layer having the following formulation, a photographic light-sensitive material sample for printing was prepared. 4
-1 to 4-8 were obtained.

Fourth layer (protective layer) Gelatin 0.4 g / m ² matting agent (polymethyl methacrylate having an area average particle size of 7.0 μm) 50 mg / m ² formaldehyde 10 mg / m ² 2,4-dichloro-6-hydroxy -1,3,5-triazine sodium salt 5 mg / m ² bis - vinylsulfonyl methyl ether 18 mg / m ² latex L 0.1 g / m ² polyacrylamide (average molecular weight 10000) 0.05g / m ² of sodium polyacrylate 20mg / M ² Polysiloxane S1 20 mg / m ² Compound I 12 mg / m ² Compound J 2 mg / m ² Compound S-1 7 mg / m ² Compound K 15 mg / m ² Compound O 50 mg / m ² Compound S-2 5 mg / m ² C ₉ F ₁₉ O (CH ₂ CH ₂ O) ₁₁ H 3 mg / m ² C ₈ F ₁₇ SO ₂ N- (C ₃ H ₇ ) (CH ₂ CH ₂ O ) ₁₅ H 2 mg / m ² C ₈ F ₁₇ SO ₂ N- (C ₃ H ₇ ) (CH ₂ CH ₂ O) ₄ (CH ₂ ) ₄ SO ₃ Na 1 mg / m ² Hardener B 1.5 mg / m ² Protective layer additive shown in Table 5 Table 5 Amount described 4-1 to 4-8
Were evaluated for static marks as follows.

[Evaluation Method] <Evaluation of Static Mark> The obtained unexposed sample was humidified at a temperature of 23 ° C. and a humidity of 20% RH for 24 hours, and then under a humidified atmosphere with a neoprene rubber roller and a chrome roller. After each friction, the SR-DF treatment solution [Konica Corporation
SRX-503 [Konica Corporation]
The processing was carried out at a development temperature of 35 ° C. for 45 seconds from dry to dry. The obtained film was visually observed, and static marks were evaluated according to the following evaluation criteria. Table 5 shows the obtained results. Table 5 also shows the dielectric constant of the emulsion, the dielectric constant of the protective layer, and the difference between the dielectric constant of the protective layer and the dielectric constant of the emulsion layer. [Evaluation Criteria] 4: No static mark is generated at all 3: Static mark is generated slightly Static mark is generated at an intermediate level between 2: 1 and 3: 1: Static mark is generated over the entire surface

[0223]

[Table 5] Water-soluble polymer (A): Water-soluble polymer (A) described above Conductive particles (A): Conductive particles (A) described above Latex (A): Fluoropolymer latex described above ( A) Latex (D): Fluoropolymer latex (D) described above

From Table 5, it can be seen that, even in an information recording material having at least two layers on both sides of the support, the dielectric property of the non-photosensitive layer located farther from the support than the photosensitive silver halide layer is. When the ratio was higher than that of the photosensitive silver halide layer, it was found that no static mark was generated.

[0225]

According to the information recording material of the present invention, the antistatic property is improved without adversely affecting information recording, excellent transportability is obtained, and the information recording material having a photosensitive silver halide emulsion layer is provided. In, there is no generation of static marks.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // B32B 7/02 104 B41M 5/26 H

Claims (3)

[Claims] 1. An information recording material having at least two layers on at least one side of a support, wherein the dielectric constant of a layer located farthest from the support is 5 (e. An information recording material characterized by being larger than s.u). 2. The information recording material according to claim 1, further comprising a light-sensitive silver halide emulsion layer. 3. A light-sensitive silver halide emulsion layer on at least one side of a support, and a non-light-sensitive layer located farther from the light-sensitive silver halide emulsion layer as viewed from at least one support. In an information recording material having
An information recording material, wherein the dielectric constant of the non-photosensitive layer is higher than the dielectric constant of the photosensitive silver halide emulsion layer.