JPH02110466A - Photosensitive body and image forming method - Google Patents

Abstract

PURPOSE:To form the polymerized image which is excellent in contrast, lightness and saturation by laminating a photosensitive layer and a polymerizable layer, exposing the layers with light existing in a specific wavelength region and heating the layers to polymerize the regions of the polymerizable layer corresponding to the unexposed parts of the photosensitive layer. CONSTITUTION:The photosensitive layer 1 and the polymerizable layer 2 are laminated, are exposed by the light exiting in the 400 to 900nm wavelength region and are heated to 60 to 180 deg.C, by which the polymn. of the regions of the polymerizable layer 1 is utilized. The polymerized images having the good contrast are more early and stably obtd. In this way and the visible images and color images having the excellent lightness and saturation and the stability thereof with age are obtd. without being affected by the black color of the silver images.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a photoreceptor used to form a polymerized image and an image forming method using the same. The present invention relates to a photoreceptor and an image forming method that can form a polymerized image with particularly excellent contrast, brightness, and chroma.

[Conventional technology]

Energy used to form or record images includes light, sound, electricity, magnetism, heat, particle beams (electron beams, X-rays), and chemical energy.
Electricity, thermal energy, or a combination of these are commonly used.

For example, image forming methods using a combination of light energy and chemical energy include methods using silver salt photography, diazo copying paper, and the like. Further, as a method using a combination of light energy and electric energy, there is an electrophotographic system. Furthermore, methods that utilize thermal energy include methods that use thermal recording paper, transfer recording paper, etc., while methods that utilize electrical energy include electrostatic recording paper, current-carrying recording paper, discharge recording paper, etc. method is known.

Among the image forming methods described above, silver salt photography is one that allows high resolution images to be obtained. However, silver salt photography requires complex development and fixing processes using liquid agents, drying processes for images (prints), and the like.

Therefore, efforts are being made to develop image forming methods that can form images through simple processing.

For example, a method is known from JP-A-61-69062, etc., in which a photosensitive reaction of silver halide is used as a trigger to cause a dry (thermal) polymerization reaction to form an image made of a polymer.

For example, according to Japanese Patent Application Laid-Open No. 62-70836, etc.
A latent image is formed by silver nuclei generated from silver halide through image exposure, and the catalytic action of the silver nuclei is used to convert the reducing agent into an oxidant having a polymerization inhibiting ability different from that of the reducing agent under heating. A method of creating a difference in polymerization inhibition ability between the reducing agent and the generated oxidant, and causing a thermal polymerization reaction using a thermal polymerization initiator to form a polymerized image corresponding to the difference in polymerization inhibition ability. It is.

However, with these methods, black silver, which is metallic silver, may remain in the formed polymerized image. In this case, when trying to obtain a color image other than black, the color The black color of silver is mixed into the image, resulting in a dull color, resulting in a color image that is unsatisfactory in brightness and saturation.

Furthermore, even if no black silver remains in the polymerized image, photosensitive silver halide remains in the polymerized image, resulting in a color image that is unsatisfactory in terms of brightness and saturation stability over time. It becomes.

In addition, JP-A-61-75342 discloses that a reducing agent having a polymerization inhibiting ability in a photosensitive silver halide-containing layer is consumed in an imagewise manner (image-exposed area) during the development process of silver halide and oxidized. After diffusing and transferring the reducing agent to the photopolymerizable layer which is in contact with the photosensitive silver halide-containing layer by heating, by uniformly injecting light energy from the outside (full-surface exposure), A method is disclosed for forming a polymerized image by photopolymerizing a portion of the photopolymerizable layer that faces the portion of the photosensitive silver halide-containing layer where the reducing agent has been consumed (image-exposed portion).

In the above method, since no black silver, which is metallic silver, and photosensitive silver halide remain in the polymerized image formed, the color image also has colors with excellent brightness, chroma, and stability over time. Although there is an advantage in that images can be obtained, it is difficult to obtain polymerized images with sufficient contrast.

That is, the reducing agent used in the above method originally has an action as a polymerization inhibitor IJ agent, but loses its action as a polymerization inhibitor after reducing silica silver halide. Therefore, if the reducing agent in the image-exposed area of the photosensitive silver halide containing layer is not sufficiently converted into an oxidant, +'6f
The portion of the photopolymerizable layer exposed to the recorded image is not sufficiently polymerized. However, if a sufficient amount of thermal energy is applied during development to sufficiently convert the reducing agent in the image-exposed area into an oxidant, a redox reaction will also occur in the image-exposed area. On the other hand, if the amount of thermal energy applied during development is reduced to prevent the oxidation-reduction reaction from occurring in the imagewise exposed area, the conversion to an oxidant in the imagewise exposed area will not proceed sufficiently. In this case, the portion of the photopolymerizable layer corresponding to the image-exposed portion of the photosensitive silver halide-containing layer is difficult to polymerize, so it is necessary to apply a large amount of light energy during full-surface exposure, which increases the amount of application. As a result, unnecessary polymerization occurs in the portion of the photopolymerizable layer opposite to the unexposed portion of the photosensitive silver halide impregnated layer, and as a result, a polymerized image with sufficient contrast cannot be obtained.

Furthermore, JP-A No. 55-50246 discloses a photoreceptor comprising a photopolymerizable composition layer, a transparent intermediate film, and a heat-developable photosensitive composition layer laminated on a support, and a photoreceptor having the heat-developable photosensitive composition layer laminated on a support. The composition layer is thermally developed to generate a black silver image, and the entire surface is exposed from the heat-developable photosensitive composition layer side, and the amount of light that has passed through the heat-developable photosensitive composition layer into the photopolymerizable composition layer. Disclosed is a method for forming a polymerized image according to the difference in .

In the above method, the heat-developable photosensitive composition layer and the photopolymerizable composition layer are not separated via an intermediate film, so that no metal silver is formed in the formed polymerized image. Although the advantage is that no residual black silver or photosensitive silver halide remains and color images with excellent brightness, chroma, and stability over time can be obtained, it is still difficult to obtain polymerized images with sufficient contrast. Not enough.

That is, in the above method, the contrast of the superposed image is
This depends on the difference between the amount of transmitted light in the image-exposed area of the heat-developable photosensitive composition layer and the amount of transmitted light in the image-exposed area, but since the amount of transmitted light in the image-exposed area does not decrease, it is difficult to obtain a polymerized image with sufficient contrast. I can't get it. In order to bring the amount of transmitted light in the image-exposed area close to 0%, methods such as increasing the amount of silver halide/organic silver salt in the heat-developable photosensitive composition layer or increasing the layer thickness can be considered. Conversely, when this is done, the amount of transmitted light in the exposed area on the image decreases, and as a result, the difference in the amount of transmitted light between the exposed area on the image and the exposed area on the image becomes smaller, and a superimposed image with sufficient contrast cannot be obtained. do not have.

For the purpose of visualizing the polymerized image obtained by the above method and further converting it into a color image, Japanese Patent Laid-Open No. 61-75342 and other publications disclose various methods that utilize the difference in physical properties between the polymerized part and the unpolymerized part. A method is disclosed.

For example, a method of treating with a liquid that does not dissolve the polymerized portion but dissolves the layer of the unpolymerized portion to elute and remove the unpolymerized portion (etching treatment), or utilizing the difference in adhesiveness between the polymerized portion and the unpolymerized portion, A method of dryly separating polymerized and unpolymerized parts by attaching a sheet such as a plastic film and then peeling it off (beer-apart treatment), and furthermore, when converting a polymer image into a color image, the photopolymerized layer is coated with pigment in advance. Color with dye or dye to dissolve stiffness (etching process mentioned above)
Alternatively, it is possible to create a color image by peeling (beer-apart treatment), or to selectively color the unpolymerized area with colored powder (toning treatment and inking treatment) by utilizing the adhesiveness of the unpolymerized area. A method has been disclosed in which the unpolymerized regions are selectively dyed by treatment with a dye solution by utilizing the difference in liquid permeability between the polymerized regions.

However, as mentioned above, in the conventional polymerized image forming method, a polymerized image with sufficient contrast cannot be obtained. Therefore, no matter which method is used for visualization and color imaging of these images, the contrast of the resulting visible and color images is insufficient, especially when obtaining high-definition visual and color images. That was difficult.

[Problem to be solved by the invention]

The object of the present invention is to solve all of the above-mentioned conventional problems, and in particular, to provide a photoreceptor and an image forming method that can quickly and stably form a polymerized image with good contrast. It is in.

Another object of the present invention is to provide a photoreceptor and an image forming method that allow visible images and color images with excellent brightness, chroma, and stability over time to be obtained without being affected by the black color of a silver image. There is a particular thing.

Another object of the present invention is to provide a photoreceptor and an image forming method that can provide visible images and color images with excellent resolution and no color cast.

[Means to solve the problem]

The photoreceptor of the present invention comprises: 1) a laminated layer of a photosensitive layer and a polymerizable layer, with a thickness of 400 nm;
Exposure to light in the wavelength range of 900 nm from 60 to 1
A photoreceptor (hereinafter referred to as photoreceptor (1)), characterized in that a region of the polymerizable layer corresponding to an unexposed area of the photosensitive layer is polymerized by heating to 80° C. (hereinafter referred to as photoreceptor (1)); and 2) Consists of laminating a photosensitive layer and a polymerizable layer, and has a thickness of 400 nm.
Exposure to light in the wavelength range of 900 nm from 60 to 1
By heating to 80° C. and exposing to light in the wavelength range of 250 to 700 nm, the polymerizable layer corresponds to the unexposed portions of the photosensitive layer of the photosensitive layer to light in the wavelength range of 400 to 900 nm. This is a photoreceptor [hereinafter referred to as photoreceptor (2)] characterized in that a region of the photoreceptor is polymerized.

In the photoreceptors (1) and (2) of the present invention, the "photosensitive layer" refers to a layer containing a photosensitive and heat-developable element, which is capable of being exposed to imagewise light in the wavelength range of 400 nm to 900 nm and 60 nm. It means a layer on which an image or latent image can be formed by heating at a temperature of 180°C to 180°C.

In particular, a layer capable of producing metallic silver etc. by such exposure and heating, that is, at least photosensitive silver halide,
A layer containing an organic silver salt and a reducing agent is desirable. In addition, the reducing agent is a reducing agent that, when oxidized, has the ability to inhibit polymerization of the polymerizable layer, and the oxidized reducing agent moves from the photosensitive layer to the polymerizable layer by heating, etc. This is desirable. If such a reducing agent is contained, there will be a difference not only in the amount of transmitted light between the image-exposed area and the image-wise exposed area, but also a difference in the ability to inhibit polymerization of the transferred oxidant.
A superimposed image with sufficient contrast is obtained.

The term "polymerizable layer" means a layer that polymerizes in accordance with the pattern in the photosensitive layer formed by the imagewise exposure and heating. In particular, a layer containing at least a polymerizable polymer precursor and a polymerization initiator is desirable. Furthermore, these two layers are
Direct lamination is preferred.

JP-A-61-75342 discloses that a portion of the polymerizable layer corresponding to the imagewise exposed portion of the photosensitive layer is polymerized by imagewise exposure, heating, and full-surface exposure. on the other hand,
The photoreceptor of the present invention is a photoreceptor that has the property that polymerization occurs not in the image-exposed area but at a site corresponding to the image-wise exposed area, and such a photoreceptor was discovered by the present inventors. The above characteristics can be imparted to the photoreceptor by, for example, selecting and containing a specific reducing agent. however,
There is no problem even if the above characteristics are imparted by components other than the reducing agent.

The photoreceptor of the present invention has the property that polymerization occurs at the exposed area on the image, so it is possible to partially generate a polymerization inhibitor in the photosensitive layer, which originally does not have a polymerization inhibitor. Even if only a small amount occurs, a superimposed image with sufficient contrast can be formed.

In the photoreceptor of the present invention, the phrase "the exposed area on the r image is polymerized" means a property of polymerization to the extent described below.

First, all or at least a portion of the photosensitive layer is dissolved or extracted by immersing or ultrasonicating an untreated photoreceptor (not subjected to imagewise exposure, heating, or full-surface exposure) for 30 seconds to 10 minutes. Select the type of solvent that will be used.

Then, when the photoreceptor after imagewise exposure, heating, and full-surface exposure is immersed or subjected to ultrasonic treatment using the above solvent in the same manner as above, the imagewise exposed area becomes more difficult to dissolve or be extracted than the imagewise exposed area, If it is confirmed by visual observation or spectroscopic measurement that an uneven pattern, turbidity pattern, colored pattern, etc. have been formed, the photoreceptor is the photoreceptor of the present invention, that is, a photoreceptor that has the property of polymerizing the exposed area on the image. be.

The photoreceptor (1) of the present invention can be used for light in the wavelength range of 400 nm to 900 nm to which silver halide is sensitive, and with energy of up to 1 mJ/cm2 on the surface of the photosensitive layer, such as sunlight, a tungsten lamp, or a mercury lamp. ,Halogen lamp,
Exposure to a light source such as a xenon lamp, fluorescent lamp, LED, laser beam, etc., and then heat at 60 to 180°C, preferably 70 to 150°C, for 1 to 40 seconds, preferably 1 to 30 seconds, using a sheet heating element, heat. By heating with a roller, dielectric heating, or electrical heating (by providing a base material on the photoreceptor and using the base material as an electrified heat-generating layer, or by providing an energized heat-generating layer below the base material). This is a photoreceptor in which only the exposed area is polymerized.

Heating in the present invention may be performed continuously or intermittently, but in either case, it is preferable to heat with a temperature gradient from low to high temperature within the above temperature range. .

After the above-mentioned exposure and heating, the photoreceptor (2) of the present invention is exposed to light to which the photopolymerization initiator in the polymerizable layer is sensitive, preferably a wavelength of 250 nm to 70 [1 nm, more preferably 300 nm to 500 nm]. up to 5 lights with
It is a photoreceptor in which only the unexposed areas are polymerized by exposure with energy up to 00 mJ/c+n2.

Hereinafter, the above-mentioned embodiments of the photoreceptors (1) and (2) of the present invention will be described, that is, the photosensitive layer is a layer containing at least a photosensitive silver halide, an organic silver salt, and a specific reducing agent. , an embodiment in which the polymerizable layer is a layer containing at least a polymerizable polymer precursor and a polymerization initiator will be described in detail.

As the silver halide contained in the photosensitive layer, silver halides known in the photographic technology can be used, such as silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, Either silver iodobromide or silver chloroiodobromide can be used.

The halogen composition of the silver halide grains may be uniform or non-uniform on the surface and inside. In the present invention, the grain size of silver halide grains is determined from the average grain size to o, ooi.
The thickness is preferably from μm to 10 μm, and particularly preferably from 0.001 μm to 5 μm.

These may be subjected to chemical sensitization or optical sensitization as is applied to ordinary photographic emulsions. In other words, for chemical sensitization, sulfur sensitization, noble metal sensitization, reduction sensitization, etc. can be used, and for optical sensitization, methods using optical sensitizing dyes such as cyanine dyes and merocyanine dyes are applied. can.

Regarding organic silver salts, see "Fundamentals of Photographic Engineering, Non-Silver Salt Edition, P.
Organic silver salts described in 247J, JP-A-59-55429, etc. can be used, and for example, silver salts of organic acids such as behenic acid, triazole silver salts, etc. can be used alone or in combination of two or more of them as appropriate. .

The reducing agent contained in the photosensitive layer has a high ability to inhibit the polymerization of the polymerizable polymer precursor contained in the polymerizable layer through an oxidation-reduction reaction under heating with an organic silver salt using silver as a catalyst. Aromatic compounds (collectively referred to as oxidants in the present invention) that can be transferred from the photosensitive layer to the polymerizable layer by heating, and at least the oxidant of the reducing agent and the oxidant can be transferred from the photosensitive layer to the polymerizable layer. hydroxy compounds are preferably used.

In other words, hydroxynaphthalenes, hydroxybinaphthyls, hydroxyanthracenes, hydroxyquinolines, bisphenols, etc.
), (IV) or (V).

J (OR)n (However, in the above formulas (I) to (V), R is a hydrogen atom,
Represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, and R1, )t2 each independently represent a hydrogen atom, a halogen atom, an alkoxy group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl group. or represents an unsubstituted aralkyl group, and R3 represents a hydrogen atom, a hydroxyl group, or a substituted or unsubstituted alkyl group. n is 0
or 1, and Z is a divalent linking group and represents an alkylidene group, an aralkyl group, or a sulfur atom. ] Specifically, for example, 4-methoxy-1-naphthol,
4-ethoxy-1-naphthol, 2-methyl-4-methoxy-1-naphthol, 5-methyl-4-methoxy-1
-naphthol, 1,5-dihydroxynaphthalene, 1,
1°-dihydroxy-2,2'-binaphthyl, 4,4'-dimethoxy-1,1'-dihydroxy-2,2'-
Binaphthyl, 1-methoxy-5-hydroxyanthracene, 1-ethoxy-5-hydroxyanthracene, 1-
methoxy-4-methyl-5-hydroxyanthracene,
1-methoxy-4,8-dimethyl-5-hydroxyanthracene, 8-hydroxyquinoline, 4-methyl-8-
Hydroxyquinoline, 4,8-dihydroxyquinoline,
2.2゛-methylenebis(4-methoxyphenol),
2.2°-methylenebis(4-ethoxyphenol),
2.2'-methylenebis(4-methylphenol), 2
．． 2°-methylenebis(4-ethylphenol) or the like is preferably used.

Note that two or more of these may be used in combination.

The photosensitive layer of the photoreceptor (+) and (2) of the present invention contains the above-mentioned silver salt and reducing agent, is dissolved and dispersed in water or a solvent together with an appropriately used binder, and is prepared by supporting the support shown in FIG. It can be formed by coating and drying on the support 3, or if the binder itself maintains its strength, it can be formed with the binder without using the support 3, as shown in FIG. 1(a). The above components can also be used by incorporating them into a film or sheet-like product.

The photosensitive layer 1 may also contain an antifoggant, a surfactant, a photographic sensitizer, a stabilizer, a binder, an antistatic agent, a plasticizer, and an alkali generator. Moreover, as the support body 2,
Metal plates such as zinc and aluminum, plastic films such as triacetylcellulose and polyethylene terephthalate,
Glass, paper, resin-coated paper, or the like can be used, and the shape thereof includes flat plate, cylindrical shape, roll shape, etc., and is not particularly limited.

The thickness of the photosensitive layer is 0.1 μ to 2 nua, preferably 1 to 0.1 mm.

A preferred blending ratio of the above components in the photosensitive layer will be described.

0.1 to 1 silver halide per 100 parts by weight of organic silver
00 parts by weight is preferred, and more preferably 0.5 to 30 parts by weight. The reducing agent is 0.5 to 3.0 per mole of silver salt.
The amount is preferably mol, more preferably 0.7 mol to 1.3 mol.

As the polymerizable polymer precursor to be contained in the polymerizable layer 3, compounds having at least one reactive vinyl group in the molecule can be used, such as reactive vinyl group-containing monomers, reactive vinyl group-containing oligomers, etc. and reactive vinyl group-containing polymers.

The reactive vinyl groups of these compounds include styrene vinyl groups, vinyl acrylate groups, vinyl methacrylate groups, allyl vinyl groups, vinyl ethers, and ester vinyl groups such as vinyl acetate, which have polymerization reactivity. Examples include substituted or unsubstituted vinyl groups.

Specific examples of polymerizable polymer precursors that satisfy these conditions are as follows.

For example, styrene, methylstyrene, chlorstyrene,
Bromostyrene, methoxystyrene, dimethylaminostyrene, cyanostyrene, aminostyrene, acrylic acid, methyl acrylate, ethyl acrylate, cyclohexyl acrylate, methacrylic acid, methyl methacrylate, ether methacrylate, propyl methacrylate, butyl methacrylate, Fer methacrylate, cyclohexyl methacrylate, vinylpyridine, N-vinylpyrrolidone, N
- Monovalent monomers such as vinylimidazole, N-methyl-2-vinylimidazole, propyl vinyl ether, butyl vinyl ether, isobutyl vinyl ether, β-chloroethyl vinyl ether, phenyl vinyl ether, p-methylphenyl vinyl ether, p~chlorophenyl vinyl ether For example, divinylbenzene, dioxalate (ethyl acrylate), dioxalate (methyl ethyl acrylate), dimalonate (ethyl acrylate), dimalonate (methyl ethyl acrylate), disuccinate (ethyl acrylate), diglutarate (ethyl acrylate), adipic acid di(ethyl acrylate)
, maleic acid di(diethyl acrylate), fumaric acid di(ethyl acrylate), β,β-dimethylglutaric acid di(ethyl acrylate), 1,4-phenylene bis(
oxyethyl acrylate), 1,4-phenylenebis(oxymethylethyl acrylate), 1,4-bis(
acryloyloxyethoxy)cyclohexane, 1.4
-Bis(acryloyloxyethoxy)cyclohexane, di(ethyl methacrylate) oxalate, di(ethyl oxalate)
methyl ethyl methacrylate), dimalonate (ethyl methacrylate), dimalonate (methyl ethyl methacrylate), di succinate (ethyl methacrylate), di succinate (methyl ethyl methacrylate), di glutarate (
ethyl methacrylate), diadipate (ethyl methacrylate), dimaleic acid (ethyl methacrylate),
Fumaric acid di(ethyl methacrylate), fumaric acid di(methyl ethyl methacrylate), β,β'-dimethylglutaric acid di(ethyl methacrylate), 1,4-phenylenebis(oxyethyl methacrylate), 1,4-bis(methacryloyl) (oxyethoxy) cyclohexane 2 such as acryloyloxyethoxyethyl vinyl ether
Value monomers: e.g. pentaerythritol triacrylate, pentaerythritol trimethacrylate, pentaerythritol tri(hydroxystyrene), i, 1
．． 1-trimethylolpropane triacrylate, 1,
1.1-trimethylolpropane trimethacrylate,
1.1.1-1 Polymerizable polymer precursors such as limethylolbrobantri(ethyl acrylate) and the like can be mentioned. In addition, as described in 11η, two or more of these polymerizable polymers 01 may be used.

A polymerization initiator that promotes image formation by polymerization reaction may be added to the polymerizable layer. Examples of the polymerization initiator include a thermal polymerization initiator for photoreceptor (1) and a thermal polymerization initiator for photoreceptor (2). Although it is preferable to use a photopolymerization initiator, it is also possible to use both in combination.

Mainly, as the thermal polymerization initiator contained in the polymerizable layer of the photoreceptor (1) of the present invention, known initiators can be used, such as azo initiators and peroxide initiators. can. An azo initiator is an organic compound having at least one nitrogen-nitrogen double bond in its molecule, such as azobisisobutyronitrile, azobiscyclohexanecarbonitrile, azobismethylphenethylcarbonitrile, azobis5ec-amylon. Tolyl, azobisphenylethane, azobiscyclohexylpropylonitrile,
Azobismethylchloroethane, trityl azobenzene,
Examples include phenylazoisobutyronitrile, 9-(p-nitrophenylazo)-9-phenylfluorene, and the like.

The peroxide initiator includes almost all organic compounds having at least one oxygen-oxygen bond in the molecule. For example, methyl ethyl ketone peroxide, cyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, methylcyclohexanone peroxide, acetylacetone peroxide, 1,1'-bis(tert-butylperoxy)-3,3,5-1 Limethylcyclohexane, 1,1'-bis(tert-butylperoxy)cyclohexane, n-butyl-4,4-bis(
tertiary butyl peroxy) parerato, 2.2'
-Bis(tert-butylperoxy)butane, tert-butyl hydroperoxide, cumene hydroperoxide, diisopropylbenvin hydroperoxide, para-menthane hydroperoxide, 2,5-dimethylhexane-2, -cybide lobar oxide , 1,1,3.3-tetramethylbutyl hydroperoxide, ditertiary butyl peroxide, tertiary butyltamyl peroxide, dicumyl peroxide, α,α°-bis(tertiary butylperoxyisopropyl)benzene, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane-3, acetyl peroxide; isobutyryl peroxide , octanoyl peroxide, decanoyl peroxide, lauroyl peroxide, 3.5.5-trimethylhexanoyl peroxide, succinic peroxide, benzoyl peroxide, 2゜4-dichlorobenzoyl peroxide, m-toluoyl peroxide oxide, diisopropyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate, di-normalpropyl peroxydicarbonate,
Di-2-ethoxyethyl peroxydicarbonate, dimethoxyisopropyl peroxycarbonate, di(3
-Methyl-3-methoxybutyl> peroxydicarbonate, tert-butyl peroxyacetate, tert-butyl peroxyisobutyrate, tert-butyl peroxypivalate, tert-butyl peroxyneodecanoate, tert-butyl Peroxyoctanoate, tertiary butyl peroxy
3,5,5-trimethylhexanoate, tertiary butyl peroxylaurate, tertiary butyl peroxybenzoate, ditertiary isoperoxyisophthalate, 2,5-dimethyl-2°5-di(benzoylperoxy) Examples include hexane, tertiary butyl peroxide maleic acid, tertiary iberoxyisobrobyl carbonate, etc., but the present invention is not limited thereto, and other known thermal polymerization initiators can also be used. .

Mainly, examples of the photopolymerization initiator contained in the polymerizable layer of the photoreceptor (2) of the present invention include carbonyl compounds, sulfur compounds, halogen compounds, redox photopolymerization initiators, and the like.

Specifically, carbonyl compounds include diketones such as benzyl, 4,4'-dimethoxybenzyl, diacetyl, and camphorquinone; benzophenones such as 4,4'-diethylaminobenzophenone and 4,4'-dimethoxybenzophenone; acetophenones such as acetophenone and 4'-methoxyacetophenone; benzoin alkyl ethers; for example 2-
Thioxanthone such as chlorothioxanthone, 2,5-diethylthioxanthone, thioxanthone-3-carboxylic acid β-methoxyethyl ester; chalcones and styryl ketones having a dialkylamino group; 3.
3'-carbonylbis(7-medoxycoumarin), 3
．． Examples include coumarins such as 3°-carbonylbis(7-dinithylaminocoumarin).

Examples of the sulfur compound include disulfides such as dibenzothiazolyl sulfide and decylphenyl sulfide.

Examples of halogen compounds include carbon tetrabromide, quinolinesulfonyl chloride, and S-
1 riazine and the like.

Redox-based photopolymerization initiators include those used in combination with trivalent iron ion compounds (e.g. ferric ammonium citrate) and peroxide, and those used in combination with photoreducible dyes such as riboflavin and methylene blue and triethanolamine. , those using a combination of reducing agents such as ascorbic acid, and the like.

Furthermore, among the photopolymerization initiators described above, two or more types can be combined to obtain a more efficient photopolymerization reaction.

Examples of such combinations of photopolymerization initiators include chalcone and styryl styryl ketones having a dialkylamino group, combinations of coumarins and S-triazines having a triheromethyl group, and camphorquinone. .

These polymerization initiators may also be used in combination of two or more thereof or in combination with the above-mentioned compounds.

Further, if necessary, a polymerization inhibitor, a surfactant, a binder, etc. may be included to improve the preservation of the polymerizable layer.

The thickness of the polymerizable layer is about 0.1 μm to 2 mm, preferably about 1 to 0.1 mm.

Regarding the composition of the polymerizable layer, the polymerizable polymer precursor 10
The polymerization initiator is preferably 0.1 to 50 parts,
More preferably, it is 0.5 to 30 parts.

The polymerizable layer of the photoreceptors (1) and (2) of the present invention contains, for example, the above-mentioned polymerizable polymer precursor and polymerization initiator, and is dissolved and dispersed in water or a solvent together with an appropriately used binder. It can be formed by coating and drying the polymerizable layer 2 on the support 3 shown in FIG. It is also possible to use the polymerizable layer 2 without using it.

The support 3 may be metal such as aluminum or copper, or plastic film such as polyester film, boilimide film, aromatic polyamide film, polycarbonate film, polysulfone film, polyphenylene sulfide film, polyetherimide film, or fluorine film. , coated paper, synthetic paper, etc. can be used.

FIGS. 1(a) to 1(d) are schematic cross-sectional views illustrating aspects of the structure of the photoreceptor of the present invention. However, the present invention is not limited to this.

FIG. 1(a) shows a photosensitive layer 1 and/or a polymerizable layer 2.
has sufficient strength and the support 3 is not used. In addition, in FIG. 1(b), a support 3 is placed on the photosensitive layer 1 side.
This shows a stacked state. FIG. 1(C) shows an embodiment in which a support 3 is laminated on the polymerizable layer 2 side. FIG. 1(d) shows an embodiment in which a photosensitive layer 1 and a polymerizable layer 2 are sandwiched between a support 3. In the embodiments shown in FIGS. 1(c) and 1(d), in addition to the role of supporting each layer, the support 3 also has the role of preventing IF from inhibiting polymerization due to oxygen, and visualizing the polymerized image using the beer-apart method. It can also serve as a base for peeling.

In addition to this, the photosensitive layer and the polymerizable layer may be provided separately on the support and laminated during the course of image formation. The thickness of the support 3 is preferably 2 μm to 2 mm, preferably 3 μm to 1 mm. Moreover, the shape thereof includes a flat plate, a cylindrical shape, a roll shape, etc., and is not particularly limited.

Suitable binders for use in the photosensitive layer and polymerizable layer 3 of the photoreceptors (1) and (2) of the present invention can be selected from a wide variety of resins.

Specifically, cellulose esters such as nitrocellulose, cellulose phosphate, cellulose sulfate, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose myristate, cellulose palmitate, cellulose acetate/propionate, cellulose acetate/butyrate;
Cellulose ethers such as methyl cellulose, ethyl cellulose, propyl cellulose, butyl cellulose; vinyl resins such as polystyrene, polyvinyl chloride, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl alcohol, polyvinylpyrrolidone; e.g. styrene-butadiene copolymers , styrene-acrylonitrile copolymer, styrene-
Copolymer resins such as butadiene-acrylonitrile copolymer, vinyl chloride-vinyl acetate copolymer; for example, polymethyl methacrylate, polydimethylaminoethyl methacrylate, polymethyl acrylate, polybutyl acrylate, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyacrylonitrile acrylic resins and copolymers thereof; polyesters such as polyethylene terephthalate;
-Impropylidene, diphenylene-co-1,4-cyclohexylene dimethylene carbonate), poly(ethylenedioxy-3,3°-phenylenethiocarbonate)
, poly(4,4'-isopropylidene diphenylene carbonate coate terephthalate), poly(4,4'
Polyarylate resins such as -isobropylidene diphenylene carbonate), poly(4,4'-5ec-butylidene diphenylene carbonate), and poly(4,4'-isobropylidene diphenylene carbonate block-oxyethylene); Polyamides; polyimides; epoxy resins; phenolic resins; examples include polyolefins such as polyethylene, polypropylene, and chlorinated polyethylene, and natural polymers such as gelatin.

In addition, colorants, polymerization inhibitors, photodiscoloration inhibitors, solid solvents, surfactants, antistatic agents, alkali generators, and the like may be added as necessary.

The image forming method of the present invention will be described below.

The image forming method of the present invention uses the photoreceptor (or (2)
) is used to form an image. In the present invention, the method may be a method using a photoreceptor in which a photosensitive layer and a polymerizable layer are laminated from the beginning, or a method in which the above two layers are laminated as appropriate during each process. good.

In the image forming method of the present invention, the polymerization process of the polymerizable layer is roughly divided into (1) photopolymerization and (2) thermal polymerization. Further, specific desirable embodiments of each of these methods are as follows.

(a) a process of imagewise exposing a photosensitive layer containing at least a photosensitive silver halide, an organic silver salt, and a reducing agent to form a latent image of silver nuclei; (b) a process of forming a latent image of silver nuclei; (C) heating the photosensitive layer to form an oxidized form of metallic silver and the reducing agent; and (C) transferring the reducing agent and the oxidized form from the photosensitive layer to a polymerizable layer containing at least a polymerizable polymer precursor. (d) heating the polymerizable layer to transfer at least the oxidant by heating and separating the oxidant from the metal silver; An image forming method [hereinafter referred to as image forming method (2)] comprising the steps of thermally polymerizing a polymerizable polymer precursor to form a polymerized image.

(a) a process of imagewise exposing a photosensitive layer containing at least a photosensitive silver halide, an organic silver salt, and a reducing agent to form a latent image by silver nuclei; (b) a process in which the latent image is formed; (c) heating the photosensitive layer to form an oxidized form of metallic silver and the reducing agent; and (c) transferring the reducing agent and the oxidized form from the photosensitive layer to a polymerizable layer containing at least a polymerizable polymer precursor. (d) uniformly exposing the polymerizable layer to light to remove portions of the polymerizable layer to which the oxidant is not transferred; Image forming method C, hereinafter referred to as image forming method (2), comprising the steps of photopolymerizing the polymerizable polymer precursor to form a polymerized image.

In the method of the present invention including the above steps, (A) a photosensitive layer containing at least a photosensitive silver halide, an organic silver salt, and a reducing agent; (B) a polymerizable layer containing a polymerizable polymer precursor; 1) Transferring at least the reducing agent and the oxidant from the photosensitive layer (A) to the polymerizable layer (B) without transferring the metallic silver generated from the silver salt, 2) The above-mentioned Polymerizable layer (
The main feature is that the portion of the polymerizable layer (B) corresponding to the imagewise exposed portion of the photosensitive layer (A), which is not transferred with the oxidant of B), is polymerized.

Therefore, the polymerized image obtained by the method of the present invention is
Since the contrast is good and metallic silver and photosensitive silver halide are not mixed, the image has excellent brightness and chroma, and is also excellent in stability over time.

Hereinafter, aspects of each process included in methods (1) and (2) will be explained with reference to the drawings.

The process (a) above is a process of writing an image with light, and as shown in FIG. 2(a), a desired image is exposed on the photosensitive layer 1. Note that the exposure may be digital exposure.

As a result, silver nuclei 4 are generated from the silver halide in the exposed area 1-a, and these form a latent image. In addition, the generated silver nucleus 4
acts as a catalyst for the thermal reaction between the organic silver salt and the like contained in the photosensitive layer 1 and the reducing agent.

The exposure conditions for writing this latent image are such that the concentration of the silver salt contained in the photosensitive layer 1 is such that the desired characteristics such as sufficient contrast can be obtained in the finally obtained polymerized image. They may be selected and used as appropriate depending on the situation.

Light at a wavelength to which silver halide is sensitive, for example, light up to 400 nm when silver halide is unsensitized with silver chloride, light up to 450 nm when silver halide is unsensitized with silver bromide, halogen If the silver is silver iodobromide and unsensitized, it is 480.
If silver halide is sensitized to light up to nm,
Light in the sensitized region (for example, in the case of infrared sensitization, about 1
(up to 1000 nm) on the surface of the photosensitive layer.
Light sources include, for example, sunlight, tungsten lamps, mercury lamps, halogen lamps, xenon lamps, fluorescent lamps, LEDs, and laser light sources. Expose with etc.

Next, in the above step (b), when the photosensitive layer 1 on which the latent image is formed is heated, the silver nuclei 4 selectively act as a catalyst in the exposed area 1-a, as shown in FIG. 1(b). At the same time, the organic silver salt, etc. is reduced to metallic silver 7, and at the same time, the reducing agent 5
is oxidized to become oxidant 6. As a result, an exposed area 1-a containing the oxidant 6 and metal silver 7 and an unexposed area 1-b containing the reducing agent 5 are formed. Reducing agent 5 used in photosensitive layer 1
has the ability to inhibit the polymerization of polymerizable polymer precursors when oxidized, and is preferably a compound represented by the general formulas (I) to (V) described above. An image is formed on the photosensitive layer 1 based on the difference in polymerization inhibition ability formed by the distribution of the reducing agent 5 and the oxidant 6.

The heating in this step (b) is 60 to 150°C;
It is preferably carried out at 70 to 140°C for 1 to 40 seconds, preferably 1 to 30 seconds. In addition, when transferring the reducing agent and the oxidizing agent together in the next step (C), the conditions necessary to form a difference in polymerization inhibition ability in the photoreceptor that is effective for image formation should be appropriately selected. If only the oxidant is selectively transferred in the next step (c), the transfer of the reducing agent and the oxidant may be carried out to enable such selective transfer. Heating may be performed by appropriately selecting conditions that make the properties (for example, sublimation property, etc.) different.

Next, in step (e), as shown in FIG. 1(C), the photosensitive layer 1 on which the image of the reducing agent and the oxidant has been formed is placed in direct contact with or in close proximity to the polymerizable layer 8. Then, at least the oxidant of the reducing agent and oxidant is transferred from the photosensitive layer 1 to the polymerizable layer 2, and these are separated from the metal silver.

Note that the photosensitive layer 1 and the polymerizable layer 2 may already be laminated before the step (a), or the photosensitive layer 1 and the polymerizable layer 2 may be laminated before the step (a).
) or after step (b). That is, it is sufficient that the photosensitive layer 1 and the polymerizable layer 2 are laminated at least by the time of transferring the reducing agent and the oxidant or the oxidant in step (e). However, in order to obtain a polymerized image with better contrast, it is desirable that the layer be laminated after step (b).

Note that FIG. 1(C) shows a mode in which the oxidant 6 is transferred to the polymerizable layer 2. However, the present invention is not limited to this embodiment, and even in an embodiment in which the reducing agent 5 and the oxidant 6 are transferred together, the polymerizable polymer in the polymerizable layer 2 is transferred by transferring them. It is possible to form images with different polymerization inhibiting abilities for precursors.

Note that the heating conditions for transfer in the above step (C) are 70
-180°C, preferably 80-150°C, for 1-40 seconds, preferably 1-30 seconds.

Next, in the above step (d), when energy such as heat or light is applied to the polymerizable layer 2, as shown in FIG. 1(d), for example, as shown in FIG. There is a difference in the state of polymer formation between the areas where the oxidant was transferred, and due to this difference, a polymerized image is formed at the areas where the oxidant was not transferred.

In the case of thermal polymerization, the polymerizable layer is heated at 70 to 180°C, preferably 80 to 150°C, for 1 to 40 seconds, preferably 1 to 3
In the case of photopolymerization, the polymerizable layer is heated for 0 seconds, preferably 250 to 700 nm, more preferably 300 to 500 nm.
Full-surface exposure is performed with light having a wavelength of r11 and an energy of up to 500 mJ/cm2.

Next, the photosensitive layer 1 is separated from the polymerizable layer 2 on which the polymerized image according to the invention is formed.

FIG. 3(a) shows that the unpolymerized portion of the polymerizable layer 2 has adhesiveness due to the polymerization inhibiting ability of the oxidant, and when the photosensitive layer 1 is separated, the adhesive portion of the photosensitive layer 1 An example in which only the polymerized portion 8 remains in the polymerizable layer 2 is shown. However, it is not limited to this example.

For example, after the above step (C), the photosensitive layer 1 and the polymerizable layer 2 may be separated and the above polymerization step (d) may be performed.

The method of the present invention is not limited to a method in which each of the above steps (a) to (d) is performed as a separate step. For example, when heating the photosensitive layer 1 in step (b), If the polymerizable layer 1 and the polymerizable layer 2 are brought into contact or in close proximity and heated, the "formation of metallic silver and the oxidant in step (b)" and the "transfer of the reducing agent and the oxidant in step (C)" can be achieved. At least the transfer of the oxidized form is possible at the same time. Furthermore, for example, the "transfer" of per-PI (c) and the "polymerization J" of step (d) can be performed simultaneously.Furthermore, steps (a), (b) and (d) can also be performed simultaneously.

As a method for converting the polymerized image obtained by the method of the present invention after step (d) into a color image, for example, the polymerizable layer contains a pigment or dye, is laminated on another image-receiving sheet, and is heated, pressurized, etc. Examples of methods include a method in which the unpolymerized portion is transferred to the image-receiving sheet, or a method in which toner or ink 9 is attached to the unpolymerized portion as shown in FIG. 3(b).

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples. In addition, in the following examples, the "overlapping part" is abbreviated as "part".

Example 1 <Preparation of photosensitive layer> The following composition was heated at 5000 rpm using a homomixer.
An emulsion was prepared by stirring for 10 minutes.

Silver bromide 1 part Silver behenate
5 parts 4-methoxy-1-naphthol 2 parts Behenic acid 2 parts Polyvinyl butyral 10 parts (degree of polymerization 2200) Isopropanol 40 parts Methyl ethyl ketone 40 parts Next, this emulsion was applied to a polyester film with an applicator to a dry film thickness of 4 μm. The photosensitive layer (1) was obtained by coating the photosensitive layer (1).

(Preparation of polymerizable layer) The following composition was thoroughly stirred and dissolved uniformly in fractions to form a coating liquid.
was created.

Methyl methacrylate/butyl methacrylate copolymer 60 parts Trimethylolpropane triacrylate 40 parts 2,4-diethylthioxanthone 4 parts Edyl dimethylaminobenzoate 3 parts Permanent red 4R 12 parts Methyl ethyl ketone, 400 parts Next,
This coating liquid was applied onto the polyester film using an applicator so that the dry film thickness was 3 μm, and the polymerizable layer (
1) was obtained.

<Image Formation> A mask was placed on the photosensitive layer (1), and a fluorescent lamp with a power consumption of 10 W having a fluorescence peak at 405 nm was exposed for 50 m5ec from a distance of 5 cm to form an image-like latent image. next,
The mask was removed and the mixture was passed through a heat developing machine adjusted to 95° C. for 20 seconds to cause an oxidation-reduction reaction in the photosensitive layer. At this time, a silver image was formed imagewise in the latent image area. Next, the photosensitive and heat-developable layer (1) and the polymerizable layer (1) were superimposed and heated at 140° C. for 2 seconds to transfer the reducing agent and oxidant. The entire surface of the polymerizable layer (1) was exposed from the photosensitive layer side for 40 seconds from a distance of 2 cm using a fluorescent lamp having a fluorescence peak at 380 parts m and having a power consumption of 15 W. When the photosensitive layer (1) and the polymerizable layer (1) were peeled off, a bright red polymerized image corresponding to the exposed areas on the image was formed on the polyester film of the polymerizable layer.

Example 2 <Preparation of photosensitive layer> 2 parts of 4-methoxy-1-naphthol of Example 1 was added to 2,2
A photosensitive layer (2) was prepared in the same manner except that 3 parts of "-methylenebis-(4-methoxyphenol)" was used.

<Image formation> Photosensitive layer (2) produced as described above and Example 1
The following image formation was performed using the polymerizable layer (1) prepared in .

A mask was placed on the photosensitive layer (2), and a fluorescent lamp with a power consumption of 10 W having a fluorescence peak at 405 parts m was exposed for 50 m5ec from a distance of 5 cm to form an image-like latent image. next,
The mask is removed, the photosensitive layer (2) and the polymerizable layer (1) are superimposed and heated and pressed at 115° C. for 15 seconds to form a pattern of reducing agent and oxidant, followed by thermal development. Transfer to the polymerizable layer (1) was performed at the same time. Next, the entire surface of the polymerizable layer (1) was exposed from the photosensitive layer side for 40 seconds from a distance of 2 cm using a fluorescent lamp having a fluorescence peak at 380 parts m and having a power consumption of 15 W. Photosensitive layer (
2) and the polymerized layer (1) are separated, and the polymerized layer (1) is separated with ethanol.
+) was etched, a clear red polymerized image corresponding to the exposed area on the image was formed on the polyester film of the polymerizable layer (1).

Example 3 <Preparation of photosensitive layer> Instead of using 2 parts of 4-methoxy-1-naphthol, 8 parts
- Example 1 except that 25 parts of hydroxyquinoline was used
An emulsion was prepared in the same manner as above, and a photosensitive layer (3) having a dry film thickness of 3 to 4 μs was prepared.

<Preparation of polymerizable layer> Next, the following composition was sufficiently stirred and mixed to be uniformly dissolved and dispersed to obtain a coating liquid.

Polyvinyl butyral 60 parts Trimethylpropane triacrylate 40 parts 2,4-dimethylthioxanthone 4 parts Ethyl dimethylaminobenzoate 3 parts n-butanol
400 parts of the coating solution was applied onto the photosensitive layer (3) to a dry film thickness of 3 mm, and then an aqueous polyvinyl alcohol solution was applied thereon to a thickness of 2 μ+ to form the photosensitive layer (3). A photoreceptor was formed by laminating the polymerizable layer (2) on 3).

<Image formation> A mask was placed on the photoreceptor, and a fluorescent lamp with a power consumption of tOW having a fluorescence peak at 405 m was illuminated at a distance of 5 cm.
m5ec irradiation to form an image-like latent image. Next, the mask was removed, the photoreceptor was adjusted to 95°C, and the heat developing machine was heated for 2 hours.
The film was heated and pressed for 0 sec, and then heated and pressurized at 150° C. for 2 sec to transfer the reducing agent and oxidant obtained by heat development.

Next, power consumption 15W with fluorescence peak at 380 parts m
The entire surface of the photosensitive layer was exposed to light from a distance of 2 cm for 40 seconds using a fluorescent lamp. The PVA layer on the surface of the photoreceptor was removed by washing with water, and then thoroughly dried. When red toner was spread over the entire surface of the polymeric layer, the part of the polymeric layer corresponding to the image-exposed area was not polymerized and was sticky, so the toner adhered to it.
The areas corresponding to the exposed areas on the image were polymerized and lost their tackiness, so the toner did not adhere and a clear red toner image was obtained.

Example 4 Preparation of photosensitive layer> The following composition was heated at 5000 rpm using a homo mixer.
An emulsion was prepared by stirring under conditions of m, ln minutes.

Silver bromide 1 part Silver behenate 5 parts 4.4°-dimethoxy-1,1-dihydroxy-2,2-binaphthyl 1.8 parts Behenic acid 2 parts Polyvinyl butyral 10 parts (degree of polymerization 2200) Isopropatol 40 parts Methyl ethyl ketone 40 parts Next, apply this emulsion to a polyester film with an applicator to a dry film thickness of 40 parts.
The photosensitive layer (4) was obtained by coating to a thickness of μm.

<Preparation of polymerizable layer> The following composition was thoroughly stirred and uniformly dispersed and dissolved to prepare a coating liquid.

Methyl methacrylate/butyl methacrylate copolymer 60 parts Trimethylolpropane triacrylate 40 parts Dicumyl peroxide 0.3 parts Permanent red 4R 12 parts Methyl ethyl ketone 400 parts Next, apply this coating liquid to the polyester film using an applicator to form a dry film thickness. The polymerizable layer (3 μm) was coated so that the
) was obtained.

<Image Formation> A mask was placed on the photosensitive layer (4), and a fluorescent lamp with a power consumption of 10 W having a fluorescence peak at 405 parts m was emitted for 50 m5eci'i from a distance of 5 cm to form an image-like latent image. Next, remove the mask and heat it in a heat developing machine adjusted to 95°C.
It passed for 0 seconds to cause an oxidation-reduction reaction in the photosensitive layer.

At this time, a silver image was formed imagewise in the latent image area. Next, this photosensitive layer (4) and the polymerizable layer (3) are overlapped to form a layer of 140 mm.
The transfer of the reducing agent 3 and the oxidant, or the oxidant, and the thermal polymerization reaction of the polymerizable layer were performed simultaneously under the conditions of .degree. C. and 2 seconds. The portion in contact with the imagewise exposed area was not polymerized but adhered to the photosensitive layer, and the polymerizable layer in contact with the imagewise exposed area was polymerized. When the photosensitive layer (4) and the polymerizable layer (3) were separated, the unpolymerized image-exposed areas were transferred to the photosensitive layer, and a bright red polymerized image was obtained on the polymerizable layer.

Example 5 Preparation of photosensitive layer) Instead of using 2 parts of 4-methoxy-1-naphthol, 1
An emulsion was prepared in the same manner as in Example 1 except that 2.5 parts of -methoxy-5-hydroxyanthracene was used, and a photosensitive layer (5) having a dry film thickness of 4 microns was prepared in the same manner.

<Preparation of polymerizable layer> The same polymerizable layer (1) as in Example 1 was produced.

(Image formation) Heating conditions for image formation: 140°C, 2 seconds to 150°C
When image formation was carried out in the same manner as in Example 1, except that the time was changed to 2 sec, a bright red polymerized image corresponding to the exposed area on the image was formed on the polyester film of the polymerizable layer (1). .

Comparative Example 1 Preparation of photoreceptor> The following composition was mixed in a homomixer at 5DOOrpm, 10
The mixture was dispersed for a minute to obtain an emulsion.

Silver bromide 0.1 part Silver behenate 0.5 part m-dimethylaminophenol 0.2 part Behenic acid
0.2 parts Methyl methacrylate - Butyl methacrylate copolymer 60 parts Trimethylolpropane triacrylate 40 parts Dicumyl peroxide 0.8 parts Permanent red 4R 12 parts Methyl ethyl ketone 400 parts This emulsion was applied on a polyester film to a dry film thickness of 6 μm. A conventional photoreceptor (CI) was obtained by applying a heat-resistant protective layer of polyvinyl alcohol to a thickness of 2 μm thereon.

(Image Formation) A latent image was formed on the photoreceptor in the same manner as in Example 1, and then heated at 120° C. for 30 seconds using a heat developing machine. At this time, a silver image was generated in the latent image area, and a polymerization reaction further occurred in the same area, and a red polymerized image was obtained by etching. However, since the silver image and red image existed in the same area, It was a poor, dull image.

Comparative Example 2 (Preparation of photosensitive layer) Silver chlorobromide emulsion (salt drawing/mol of bromine 1.5 g 10% by weight aqueous solution of methylene blue phthalocyanine dimedone sorbitol 0, 007 g o, 1 g 0, 2 g 0, 5 g Phenidone 0 , 1 g of triethanolamine, 0.1 g of sorbitol, and 0.2 g of sorbitol was coated on a polyethylene terephthalate film to a dry film thickness of about 1-1, and dried to form a photosensitive layer (
C1) was created. The amount of silver halide coated was 0.05 g/m'' in terms of silver.

<Preparation of polymerizable layer> Pentaerythritol was emulsified for 1 hour in a mixed solution consisting of a 2 g tetraacrylate aqueous solution using an ultrasonic emulsifier, and then applied onto a polyethylene terephthalate film to a dry film thickness of about 7-100 g, and dried. Thus, a polymerized layer (C1) was created.

A mask was placed on the photosensitive layer (C1), and a fluorescent lamp with a power consumption of 10 W having a fluorescence peak at 405 nm was exposed for 50 m5ec from a distance of 5 cm to form an image-like latent image. Next, the mask was removed and the film was passed through a heat developing machine adjusted to 110° C. for 15 seconds.

Next, this photosensitive and heat-developable layer (C1) and the polymerizable layer (
C1) and heated at 110° C. for 15 seconds. 30 at 50,000 lux using a halogen lamp
The photosensitive layer (C1) and the polymerizable layer (C1
) and 3 with a mixed solvent of 1=1 of ethanol and water.
After 0sec etching, although the blue color is clear,
Due to insufficient polymerization, edges were disturbed and only an unclear image-like polymerized image was obtained.

[Effects of the Invention] According to the photoreceptor and image forming method of the present invention described in detail above, a polymerized image having good contrast can be formed more quickly and stably, and furthermore, it is possible to form a polymerized image having good contrast, and furthermore, it is possible to form a polymerized image that is not affected by the black color of a silver image. Visible images and color images with excellent brightness, chroma, and stability over time can be obtained without any problems.

Further, according to the photoreceptor and image forming method of the present invention, visible images and color images with excellent resolution and no color cast can be obtained.

[Brief explanation of drawings]

FIGS. 1(a) to (d) are schematic cross-sectional views showing the photoreceptor of the present invention, and FIGS. 2(a) to (d) are schematic cross-sectional views showing aspects of each process of the image forming method of the present invention. Figure 3(a),
(b) is a schematic cross-sectional view showing an aspect of the visible imaging process of the image forming method of the present invention. 1... Photosensitive layer la... Exposed area lb unexposed area 2... Polymerizable layer 3... Support 4... Silver nucleus 5... Reducing agent 6... Oxidized product 7...Metallic silver 8...Polymerizable layer 9...Toner or ink patent applicant Oriental Photo Industry Co., Ltd. Canon Co., Ltd.

Claims (1)

[Claims] 1) Consisting of a laminated photosensitive layer and a polymerizable layer, with a thickness of 400 nm.
Exposure to light in the wavelength range of 900 nm from 60 to 1
A photoreceptor characterized in that a region of the polymerizable layer corresponding to an unexposed portion of the photosensitive layer is polymerized by heating to 80°C. 2) Consists of laminating a photosensitive layer and a polymerizable layer, and has a thickness of 400 nm.
Exposure to light in the wavelength range of 900 nm from 60 to 1
By heating to 80°C and exposing to light in the wavelength range of 250 to 700 nm, areas of the polymerizable layer corresponding to the unexposed areas of the photosensitive layer to light in the wavelength range of 400 to 900 nm are exposed. A photoreceptor characterized by polymerization. 3) In a photoreceptor formed by laminating a photosensitive layer and a polymerizable layer, the photosensitive layer has the following general formula (I), (II), (
A photoreceptor characterized by containing at least one compound among the compounds represented by III), (IV), or (V). ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼…(I) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼…(II) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼…(III) ▲ Mathematical formulas, chemical formulas, tables, etc. Yes▼...(IV) ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(V) (However, in the above general formulas (I) to (V), R is a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkyl group, etc.) represents a substituted aralkyl group; R^1 and R^2 each independently represent a hydrogen atom, a halogen atom, an alkoxy group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group; , R^3 represents a hydrogen atom, a hydroxyl group, or a substituted or unsubstituted alkyl group. n is 0 or 1, and z is a divalent linking group and represents an alkylidene group, an aralkylidene group, or a sulfur atom.] 4) (a) a step of imagewise exposing a photoreceptor formed by laminating a photosensitive layer and a polymerizable layer; (b) a step of heating the photoreceptor; and (c) a polymerizable layer of the photoreceptor. An image forming method comprising the step of polymerizing an area corresponding to an image-unexposed area of the photosensitive layer. 5) (a) A process of imagewise exposing a photoreceptor formed by laminating a photosensitive layer and a polymerizable layer, and (b) heating the photoreceptor to form an image-unexposed portion of the photosensitive layer in the polymerizable layer. An image forming method characterized by comprising a step of polymerizing a region corresponding to. 6) (a) a step of imagewise exposing the photoreceptor according to claim 3;
An image forming method comprising: (b) heating the photoreceptor; and (c) forming a polymerized image on a polymerizable layer of the photoreceptor. 7) (a) a step of imagewise exposing the photoreceptor according to claim 3;
(b) An image forming method comprising the step of heating the photoreceptor to form a polymerized image on the polymerizable layer. 8) (a) a process of imagewise exposing the photosensitive layer; (b) a process of heating this laminate after laminating a polymeric layer on the photosensitive layer; and (c) a process of heating the laminate of the polymerizable layer of the laminate. , a step of polymerizing an area of the photosensitive layer corresponding to an unexposed area of the image. 9) (a) A process of imagewise exposing the photosensitive layer; and (b) After laminating a polymerizable layer on the photosensitive layer, heating this laminate to expose the photosensitive layer to an image of the polymerizable layer. An image forming method comprising the step of polymerizing an area corresponding to an exposed area. 10) (a) a step of imagewise exposing the photosensitive layer; (b) a step of heating the photosensitive layer; and (c) a step of laminating a polymerizable layer on the photosensitive layer; An image forming method comprising the step of polymerizing an area corresponding to an image-unexposed area of a photosensitive layer. 11) (a) a process of imagewise exposing the photosensitive layer; (b) a process of heating the photosensitive layer; and (c) heating the laminate after laminating a polymerizable layer on the photosensitive layer. process and (d
) An image forming method comprising the step of polymerizing an area of the polymerizable layer of the laminate corresponding to an image-unexposed area of the photosensitive layer. 12) (a) a step of imagewise exposing a photoreceptor formed by laminating a photosensitive layer and a polymerizable layer; (b) a step of heating the photoreceptor; and (c) a step of exposing the photoreceptor to a photoreceptor; . An image forming method comprising the steps of: polymerizing a region of the photosensitive layer corresponding to an image-unexposed area to form a positive image and a negative image in response to the image exposure.