JP2002148793A - Method for forming image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming images of high sensitivity and to provide a method for forming images which does not cause coloring into yellow in a non-image part of a transferred image. SOLUTION: In the method for forming images by using a photosensitive transfer sheet having a peeling layer and a photopolymerization photosensitive resin layer in this order on a supporting body and by exposing and developing the sheet to form an image, the photopolymerization photosensitive resin layer of the sheet contains compounds expressed by general formula (1) and organic boron compounds expressed by general formula (A) as the photopolymerization initiator. During exposure, at least the photopolymerization photosensitive resin layer of the sheet is controlled to >=30 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a prepress proof for color proofing, and an image forming method using a photosensitive transfer sheet used for a display or the like.

[0002]

2. Description of the Related Art Conventionally, as a plate making method of a color proofing method (prepress proof) using a photopolymer, usually, after exposing a mask (surface exposure) through a lith film, a non-image portion is dissolved and removed. The desired prepress proof was obtained.

In recent years, digitization techniques for electronically processing, storing, and outputting image information using a computer have become widespread. Then, various new image output systems corresponding to such digitizing technology have come to be put into practical use. As a result, a direct digital color proof (DDC) that scans a highly directional light such as a laser beam in accordance with digitized image information and directly manufactures a prepress proof without passing through a lith film.
There is a long-felt need for P) technology, and it is an important technical problem to obtain a prepress proof master suitable for this technology. Recent advances in laser technology have been remarkable, for example, in In
Semiconductor lasers that can continuously oscillate in the range of 350 nm to 450 nm using GaN-based materials have been put to practical use. If a DDCP system using these short-wave light sources can be constructed, it is possible to use a photosensitive material having a short-wavelength photosensitive area that can be operated under a brighter safelight. further,
Semiconductor lasers can be manufactured at low cost due to their structure.
It is very preferable as a light source for a CP system.
For these reasons, it has been strongly desired to obtain a prepress proof suitable for a DDCP system using a semiconductor laser having a relatively short wavelength of 350 nm to 450 nm, but the sensitivity is not sufficient with the conventional one. Was.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a DD
It is an object of the present invention to provide an image forming method which achieves high sensitivity by using a photosensitive transfer sheet used for a photosensitive layer such as a photosensitive transfer sheet for scanning exposure which is compatible with a CP system. Also,
An object of the present invention is to form an image on a photosensitive transfer sheet by exposing and developing, and once transferring an image of each color with a release layer onto a sheet provided with a photopolymerizable image receiving layer, and thereafter When re-transferred to a permanent support, and further performed an operation of solidifying the photopolymerizable image-receiving layer by overall exposure, using a photosensitive transfer sheet that does not cause yellow coloring in the non-image area where the image has been transferred, An object of the present invention is to provide an image forming method with high sensitivity.

[0005]

The above object is achieved by the following means. That is, the present invention provides: <1> Exposure using a photosensitive transfer sheet having, in this order, a release layer made of an organic polymer, and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator on a support. In an image forming method of forming an image by developing, a compound represented by the following general formula (1) and a compound represented by the following general formula (A) are added to a photopolymerizable photosensitive resin layer in the photosensitive transfer sheet as a photopolymerization initiator. Wherein the temperature of at least the photopolymerizable photosensitive resin layer of the photosensitive transfer sheet is set to 30 ° C. or higher at the time of exposure.

[0006]

Embedded image

In the general formula (1), Q _{1 to} Q ₃ are:
Each independently represents an oxygen atom or a sulfur atom. R ₁ and R ₂ each independently represent a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group. Z ₁ and Z ₂ each independently represent a substituent required for the compound represented by the general formula (1) to become a dye.

[0008]

Embedded image

In the general formula (A), Ra¹, R
a^Two, And Ra^ThreeIs independently an aliphatic group, an aromatic group
Group, heterocyclic group, or -SiRa^FiveRa⁶Ra⁷Represents R
a^Five, Ra ⁶And Ra⁷Is each independently an aliphatic group or
Represents an aromatic group. Ra^FourRepresents an aliphatic group. Y⁺Is positive
Represents a group capable of forming an on.

<2> Using a photosensitive transfer sheet having, in this order, a release layer made of an organic polymer and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator on a support,
In the image forming method of forming an image by developing, a compound represented by the following general formula (2) as a photopolymerization initiator is added to the photopolymerizable photosensitive resin layer of the photosensitive transfer sheet; An image forming method, comprising a compound capable of generating a radical by interacting with the compound represented by the formula (1), wherein the temperature at the time of exposing the photosensitive transfer sheet is 30 ° C. or higher.

[0011]

Embedded image

In the general formula (2), R ₃ and R
₄ each independently represents a hydrogen atom or a monovalent substituent. Z ₃ and Z ₄ each independently represent a substituent required for the compound represented by the general formula (2) to become a dye.

<3> Using a photosensitive transfer sheet having, in this order, a release layer made of an organic polymer and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator on a support,
In the image forming method of forming an image by developing, a compound represented by the following general formula (3) as a photopolymerization initiator is added to the photopolymerizable photosensitive resin layer in the photosensitive transfer sheet; An image forming method, comprising a compound capable of generating a radical by interacting with the compound represented by the formula (1), wherein the temperature at the time of exposing the photosensitive transfer sheet is 30 ° C. or higher.

[0014]

Embedded image

In the general formula (3), L ₁ and L
₂ each independently represents a methine group which may be substituted; m represents an integer of 0 to 3. G ₁ and G ₂ each independently represent an electron-withdrawing group or combine with G ₁ and G ₂ to form an aromatic ring or a heterocyclic ring. Q ₃ represents an oxygen atom or a sulfur atom. R ₁ and R ₂ are each independently
Represents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group.

<4> The image forming method according to <2>, wherein the compound represented by the general formula (2) is a compound represented by the following general formula (4).

[0017]

Embedded image

In the general formula (4), L ₁ and L
₂ each independently represents a methine group which may be substituted; m represents an integer of 0 to 3, and G ₁ and G ₂ each independently represent an electron-withdrawing group, or form an aromatic ring or a heterocyclic ring by combining G ₁ and G ₂ . R ₃ and R ₄ are
Each independently represents a hydrogen atom or a monovalent substituent.

<5> The image according to any one of <2> to <4>, wherein the compound capable of generating a radical is an organic boron compound represented by the following general formula (A). Forming method.

[0020]

Embedded image

In the general formula (A), Ra¹, R
a^Two, And Ra^ThreeIs independently an aliphatic group, an aromatic group
Group, heterocyclic group, or -SiRa^FiveRa⁶Ra⁷Represents R
a^Five, Ra ⁶And Ra⁷Is each independently an aliphatic group or
Represents an aromatic group. Ra^FourRepresents an aliphatic group. Y⁺Is positive
Represents a group capable of forming an on.

<6> An organic polymer layer containing a coloring material is provided between the release layer and the photopolymerizable photosensitive resin layer. > The image forming method according to any one of the above. <7> The image forming method according to any one of <1> to <5>, wherein the photopolymerizable photosensitive resin layer contains a coloring material. <8> The image forming method according to any one of <1> to <7>, wherein the exposure is performed at an oscillation wavelength of 350 nm to 450 nm.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The image forming method of the present invention uses a specific photosensitive transfer sheet (to be simply referred to as a "photosensitive transfer sheet" hereinafter) to be described below. The temperature of the polymerizable photosensitive resin layer is 30 ° C.
It is characterized by the above. In the image forming method of the present invention, high sensitivity can be achieved by exposing at least a photopolymerizable photosensitive resin layer of a specific photosensitive transfer sheet described below at 30 ° C. or higher.

In the image forming method of the present invention, a photosensitive transfer sheet having at least a photopolymerizable photosensitive resin layer at 30 ° C. or higher is exposed, but preferably at 40 ° C. or higher. On the other hand, exposure at 140 ° C. or higher is not preferable because problems such as deterioration of dimensional stability, poor smoothness of the sheet surface, and occurrence of coloring may occur. If the photopolymerizable photosensitive resin layer of the photosensitive transfer sheet at the time of this exposure is lower than 30 ° C. or higher, high sensitivity cannot be obtained. At the time of exposure, the photosensitive transfer sheet may have a temperature of at least 30 ° C. or more of the photopolymerizable photosensitive resin layer.
If it is above, at least the temperature of the photopolymerizable photosensitive resin layer is generally 30 ° C. or higher.

In the image forming method of the present invention, the means for heating (or keeping the temperature) the photosensitive transfer sheet is not particularly limited, but may be, for example, hot water, a heater, hot air or the like. Among these, it is preferable to carry out with hot water from the viewpoint of safety and workability.

[Image Formation] The image formation method of the present invention can be performed, for example, by an operation according to the surprint method described below.
It can be used for color proofing.

1) Exposure is performed by irradiating an actinic ray with the color separation mask superimposed on the photosensitive transfer sheet (exposure step). 2) By treating this transfer sheet with a developer, a decomposed image is formed on the release layer (development step). 3) By repeating the above exposure step and development step using another photosensitive transfer sheet, a color proofing sheet of two to four colors is obtained.

Note that the above-mentioned exposure step is performed as described above.
This is performed using a photosensitive transfer sheet at 0 ° C. or higher. In addition, as the exposure method in the exposure step, a known exposure method can be used. Generally, the exposure is performed at an oscillation wavelength in the near ultraviolet to infrared region, particularly preferably at an oscillation wavelength of 350 nm to 450 nm. Is good. The light source that can be used for exposure can be appropriately selected from known light sources having a light source wavelength in the near ultraviolet to infrared region. Among them, the maximum absorption wavelength of the light source is preferably from 300 to 1000 nm, more preferably from 350 to 450 nm. Further, as the light source, for example, ultrahigh-pressure, high-pressure, medium-pressure, low-pressure mercury lamps, chemical lamps, carbon arc lamps, xenon lamps, various visible and ultraviolet laser lamps, fluorescent lamps, tungsten lamps, sunlight and the like are suitable. However, a semiconductor laser such as an InGaN-based laser is more preferable because the device can be simplified and miniaturized and a low cost can be achieved.

4) With respect to the color proofing sheet having the first color separation image, after the separation image side is overlapped so as to be in contact with the image receiving layer of the image receiving sheet comprising the support and the photopolymerizable image receiving layer. Then, heat and pressure are applied for bonding. The decomposed image is thermocompression bonded while being embedded in the uncured image receiving layer. Next, the support (temporary support) of the transfer sheet is peeled, and the decomposed image is transferred together with the release layer (transfer step).

Further, by the same operation using the remaining color proofing sheets, the separation images of the second and subsequent colors are sequentially transferred onto the same image receiving sheet while matching the separation images of the first color. On the image receiving sheet, two-color to four-color separated images are transferred and formed while being embedded in the image receiving layer.

5) The support of the image receiving sheet to which the multicolor image has been transferred is superimposed on the white paper so that the multicolor image is in contact with the white paper, and then heated and pressed to adhere. 6) Irradiate the entire surface with actinic light through the support of the image receiving sheet to photo-cur the photopolymerizable image-receiving layer. 7) By peeling off the support (temporary support) of the image receiving sheet, a mat film or the like may be superimposed on the image receiving layer and heated and pressurized to form fine irregularities on the surface of the image receiving layer, if desired.

In the above description, white paper is given as an example of the support on which the decomposed image is finally transferred. However, various types of paper, metal, film, glass and the like can be used as the support. . Also, without going through the image receiving sheet,
It is also possible to transfer directly to the final support.

Further, the color proofing sheets of two to four colors obtained in the third step can be used for color proofing according to the overlay method by directly and accurately superimposing them.

[Photosensitive Transfer Sheet] In the image forming method of the present invention, a specific photosensitive transfer sheet is provided on a support.
A release layer made of an organic polymer and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator are provided in this order. Here, the support will be described first.

<Support> In the photosensitive transfer sheet, the material of the support is chemically and thermally stable.
In addition, a substance having flexibility is preferably used. Further, if necessary, a substance having actinic ray transmittance may be used. Specifically, for example, JP-A-47-41830, JP-A-48-9337, such as cellulose acetate, polyvinyl chloride, polystyrene, and polypropylene.
And various substances described in JP-A-51-5101 are preferable, and among them, polyethylene terephthalate, polycarbonate and heat-treated products thereof are more preferable.

On the surface of the support opposite to the surface on which the release layer made of an organic polymer is provided, polyvinyl butyral, vinyl chloride / vinyl acetate copolymer, cellulose acetate is used for the purpose of improving workability. A back layer made of a polymer material such as the above may be provided. The back layer may contain various additives such as a matting agent.

<Release Layer> Next, the release layer made of the organic polymer will be described. A release layer made of an organic polymer is provided on the support (the surface opposite to the surface on which the back layer is provided). As a material of the organic polymer constituting the release layer, a known material which is already used as a material of the release layer of the photosensitive transfer sheet can be appropriately selected and used. Examples of such materials include alcohol-soluble polyamides, hydroxystyrene-based polymers, polyvinyl acetate, poly (meth) acrylate, polyvinyl chloride, polyvinyl butyrate, and methyl methacrylate.
Acrylate copolymer, polyethylene / (meth) acrylic acid copolymer, polyethylene / (meth) acrylic acid copolymer metal crosslinked product, cellulose acetate butyrate,
Vinyl chloride / vinyl acetate copolymer, cellulose diacetate,
Cellulose triacetate, polyvinyl alcohol, styrene
A blend of a partially esterified resin of a maleic anhydride copolymer and methoxymethylated nylon is preferred. Among them, a mixture of an alcohol-soluble polyamide and a hydroxystyrene-based polymer is more preferable. in this case,
The ratio of the alcohol-soluble polyamide to the hydroxystyrene-based polymer is from 4: 6 to 4 from the viewpoint of the releasability of the release layer from the support under high humidity and the adhesion to the image-receiving side support during transfer. It is preferably 9: 1 (weight mixing ratio).

The release layer can be formed by dissolving the organic polymer in a suitable solvent to prepare a coating solution, coating the coating solution on a support, and drying.
Various surfactants can be added to the coating solution as a surface condition improving agent, and fluorine surfactants are particularly effective. The thickness of the release layer is 0.1 to 20 μm
Is preferred, more preferably 0.2 to 5 μm, and 0.3 to
3 μm is particularly preferred.

<Photopolymerizable photosensitive resin layer> Here, the photopolymerizable photosensitive resin layer containing the photopolymerization initiator will be described. The photosensitive transfer sheet has, on the support, a release layer made of the organic polymer, and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator, in this order. Depending on the type, it has the following first to third aspects. A first aspect of the photosensitive transfer sheet is that the photopolymerization initiator comprises a compound represented by the general formula (1) and an organic boron compound represented by the general formula (A). It is. Further, the second aspect is as follows.
The photopolymerization initiator is a compound represented by the general formula (2) and a compound capable of generating a radical by interacting with the compound represented by the general formula (2) (hereinafter, referred to as “radical generator”). In some cases.). Further, a third aspect is a compound in which the photopolymerization initiator interacts with the compound represented by the general formula (3) and the compound represented by the general formula (3) to generate a radical. (Hereinafter, may be referred to as “radical generator”). In the second embodiment, the photopolymerization initiator is a compound represented by the general formula (4), which is a preferable compound among the compounds represented by the general formula (2), and a radical There is an embodiment of a photosensitive transfer sheet comprising a generator.

When the photosensitive transfer sheets of the first to third embodiments are irradiated with light, each of the compounds represented by the general formulas (1) to (3) absorbs light, and In the aspect, the organic boron compound represented by the general formula (A) interacts with the compound represented by the general formula (1), and in the second and third aspects, the radical generator A monomer compound that interacts with each of the compound represented by the general formula (2) and the compound represented by the general formula (3) to generate a radical, and the radical forms a photopolymerizable photosensitive resin layer; Undergoes radical polymerization.

As a material for the photopolymerizable photosensitive resin layer, various materials used for known photosensitive transfer sheets can be used, and water or an alkali developing type photopolymerizable photosensitive resin is preferable. . For details of the material of the photopolymerizable photosensitive resin layer, and a method of forming the same,
For example, JP-B-46-15326 and JP-B-46-35682.
JP-A-47-41830 and JP-A-48-93337.
Nos. 49-441, 51-5101, 59-
No. 97140 and the like.

The photopolymerizable photosensitive resin layer usually has a boiling point of 150 ° C. or higher at normal pressure and has at least one monomer compound having a group capable of forming a photopolymer by addition polymerization; It comprises a binder, and a photopolymerization initiator activated by actinic rays, and, if necessary, contains other components such as a thermal polymerization inhibitor, and the photopolymerizable photosensitive resin layer is contained therein. Is characterized by a photopolymerization initiator. The thickness of the photopolymerizable photosensitive resin layer is generally preferably 0.5 to 150 μm,
μm is more preferred. Hereinafter, each component contained in the photopolymerizable photosensitive resin layer will be described.

-Monomer Compound- As the monomer compound that can be used for forming the photopolymerizable photosensitive resin layer, a vinyl monomer and a vinylidene monomer are preferable, and among them, unsaturated esters of polyol are more preferable, and acrylic acid and methacrylic acid are preferable. Esters are more preferred. Among them, particularly preferred specific examples include ethylene glycol diacrylate, glycerin triacrylate, polyacrylate, ethylene glycol dimethacrylate, 1,3-propanediol dimethacrylate, polyethylene glycol dimethacrylate, and 1,2,4-butanetriol trimethacrylate. , Trimethylolethane triacrylate, pentaerythritol dimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol-polyacrylate , 1,3-propanediol-diacrylate, 1,
5-pentanediol-dimethacrylate, 200-4
Bisacrylates, bismethacrylates and similar compounds of polyethylene glycol having a molecular weight of 00.

As the monomer compound, an unsaturated amide can also be used.
Acrylic acid with diamine, unsaturated amide of methacrylic acid and ethylenebismethacrylamide can be mentioned. The alkylene chain of the unsaturated amide may be opened by a carbon atom.

The monomer compounds may be used alone or as a mixture of two or more. However, the photopolymerizable monomer is not limited to these compounds.

-Organic Polymer Binder- The following organic polymer binders are preferably exemplified, but are not limited to these in the present invention. As the organic polymer binder, an addition polymer having a carboxylic acid in the side chain, an acidic cellulose derivative having a carboxylic acid in the side chain, and the like are preferable. Among the addition polymers having a carboxylic acid in the side chain, methacrylic acid Copolymers, acrylic acid copolymers, itaconic acid copolymers, crotonic acid copolymers, partially esterified maleic acid copolymers and the like are more preferred. Among the methacrylic acid copolymers, a copolymer of methyl methacrylate and methacrylic acid, a copolymer of ethyl methacrylate and methacrylic acid, a copolymer of butyl methacrylate and methacrylic acid,
Copolymers of allyl methacrylate and methacrylic acid, copolymers of ethyl acrylate and methacrylic acid, copolymers of ethyl methacrylate and styrene and methacrylic acid, and copolymers of benzyl methacrylate and methacrylic acid ,
More preferred. Among the acrylic acid copolymers, a copolymer of ethyl acrylate and acrylic acid, a copolymer of butyl acrylate and acrylic acid, a copolymer of ethyl acrylate and styrene and acrylic acid, and the like, preferable.

The organic polymer binder may be used alone, or two kinds thereof having good compatibility with each other to the extent that demixing does not occur during the manufacturing process from preparation of the coating solution to coating and drying. The above organic polymer binders may be mixed and used at an appropriate ratio. The molecular weight of the organic polymer binder can take a wide range of values depending on the type of polymer, but is generally 5,000.
２００2,000,000 is preferable, and 10,000-1,000,000 is more preferable.

Here, the mixing ratio of the monomer compound and the organic polymer binder varies depending on the combination of the monomer compound and the organic polymer binder used. It is preferably 10 to 2: 1 (weight ratio).

-Photopolymerization Initiator- As the photopolymerization initiator contained in the photopolymerization type photosensitive resin layer, the compound represented by formula (1) and the compound represented by formula (1) used in the first embodiment are used. (A) an organic boron compound represented by the formula (2), a compound comprising the compound represented by the general formula (2) and a radical generator used in the second embodiment, and a third embodiment. And a compound comprising the compound represented by the general formula (3) and a radical generator. Further, in the second embodiment, a compound comprising a compound represented by the general formula (4) and a radical generator, which is a preferable compound among the compounds represented by the general formula (2), may be mentioned. Hereinafter, the compounds represented by the general formulas (1) to (4), the organic boron compound represented by the general formula (A), and the radical generator will be described.

A) Compounds represented by the general formulas (1) to (4) The general formulas (1) to (4) constituting the photopolymerization initiator used in the first to third embodiments. The compound represented by is a neutral organic dye having no counter anion in the structure. In the photopolymerization initiator according to the first aspect, the compound represented by the general formula (1) has a function of spectrally sensitizing radical generation from the organic boron compound represented by the general formula (A). In the photopolymerization initiators of the second and third aspects, the compounds represented by the general formulas (2), (4) and (3) have a function of spectrally sensitizing a radical generator. Having. That is, the above general formulas (1) to
When irradiated with near-ultraviolet to infrared light corresponding to the absorption of the compound represented by (4), even if the organic boron compound or the radical generator does not have absorption in this region, Radical generation can be promoted. Further, the general formulas (1) to (4)
The compound represented by the formula (1) exhibits a high decoloring property particularly when irradiated with light having a wavelength of 350 to 450 nm. Therefore, the photosensitive transfer sheet suppresses fogging in the non-image area and color reproducibility in the image area. , A clear image with high contrast can be formed.

A) -1 General formula (1) and general formula (3)
Compound represented by

[0052]

Embedded image

In the general formula (1), Q _{1 to} Q ₃ are:
Each independently represents an oxygen atom or a sulfur atom. R ₁ and R ₂ each independently represent a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group. Z ₁ and Z ₂ each independently represent a substituent required for the compound represented by the general formula (1) to become a dye.

In the general formula (1), R ₁ and R
₂ is each independently a hydrogen atom, an aliphatic group, an aromatic group,
Or a heterocyclic group. When R ₁ and R ₂ represent an aliphatic group, examples of the aliphatic group include an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an alkynyl group, a substituted alkynyl group, an aralkyl group, and a substituted aralkyl group. And the like, among which an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aralkyl group, or a substituted aralkyl group is preferable, and an alkyl group,
Substituted alkyl groups are particularly preferred. Further, the aliphatic group may be a cyclic aliphatic group or a chain aliphatic group. The chain aliphatic group may have a branch.

Examples of the alkyl group include linear, branched and cyclic alkyl groups. The alkyl group preferably has 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms. The preferred range of the number of carbon atoms in the alkyl portion of the substituted alkyl group is the same as in the case of the alkyl group. The alkyl group may be a substituted alkyl group or an unsubstituted alkyl group. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group, a 2-ethylhexyl group, a decyl group, a dodecyl group,
Examples include an octadecyl group, a cyclohexyl group, a cyclopentyl group, a neopentyl group, an isopropyl group and an isobutyl group.

Examples of the substituent of the substituted alkyl group include a carboxyl group, a sulfo group, a cyano group, a halogen atom (for example, a fluorine atom, a chlorine atom, and a bromine atom), a hydroxy group, and an alkoxycarbonyl group having 30 or less carbon atoms (for example, , A methoxycarbonyl group, an ethoxycarbonyl group, a benzyloxycarbonyl group), an alkylsulfonylaminocarbonyl group having 30 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 30 or less carbon atoms, An alkoxy group having 30 or less carbon atoms (for example, a methoxy group, an ethoxy group, a benzyloxy group, a phenoxyethoxy group, a phenethyloxy group, etc.), an alkylthio group having 30 or less carbon atoms (for example, a methylthio group, an ethylthio group,
A methylthioethylthioethyl group or the like), an aryloxy group having 30 or less carbon atoms (for example, a phenoxy group, a p-tolyloxy group, a 1-naphthoxy group, a 2-naphthoxy group or the like);
Nitro group, alkyl group having 30 or less carbon atoms, alkoxycarbonyloxy group, aryloxycarbonyloxy group,

An acyloxy group having 30 or less carbon atoms (eg, acetyloxy group, propionyloxy group, etc.), an acyl group having 30 carbon atoms or less (eg, acetyl group, propionyl group, benzoyl group, etc.), a carbamoyl group (eg, carbamoyl group) Group, N, N-dimethylcarbamoyl group, morpholinocarbonyl group, piperidinocarbonyl group, etc.), sulfamoyl group (for example, sulfamoyl group,
An N, N-dimethylsulfamoyl group, a morpholinosulfonyl group, a piperidinosulfonyl group, etc., an aryl group having 30 or less carbon atoms (for example, phenyl, 4-chlorophenyl, 4-methylphenyl, α-naphthyl) And the like, a substituted amino group (for example, an amino group, an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, an acylamino group, etc.), a substituted ureido group, a substituted phosphono group, a heterocyclic group and the like. Here, the carboxyl group, sulfo group, hydroxy group, and phosphono group may be in a salt state. At that time, examples of the cation forming a salt include Y ⁺ described below.

Examples of the alkenyl group include linear, branched and cyclic alkenyl groups. The alkenyl group preferably has 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms. For the alkenyl portion of the substituted alkenyl group,
The preferred range of the number of carbon atoms is the same as in the case of the alkenyl group. The alkenyl group may be a substituted alkenyl group or an unsubstituted alkenyl group. Examples of the substituent of the substituted alkenyl group include the same substituents as in the case of the substituted alkyl group.

Examples of the alkynyl group include linear, branched and cyclic alkynyl groups. The alkynyl group preferably has 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms. The preferred range of the number of carbon atoms in the alkynyl portion of the substituted alkynyl group is the same as in the case of the alkynyl group. Further, the alkynyl group may be either an alkynyl group having a substituent or an unsubstituted alkynyl group. Examples of the substituent of the substituted alkynyl group include the same substituents as in the case of the above-mentioned substituted alkyl group.

Examples of the aralkyl group include linear, branched and cyclic aralkyl groups. The aralkyl group preferably has 7 to 35 carbon atoms, more preferably 7 to 25 carbon atoms. The preferred range of the number of carbon atoms in the aralkyl portion of the substituted aralkyl group is the same as in the case of the aralkyl group. Further, the aralkyl group may be either an aralkyl group having a substituent or an unsubstituted aralkyl group. Examples of the substituent of the substituted aralkyl group include the same substituents as in the case of the above-mentioned substituted alkyl group.

When R ₁ and R ₂ represent an aromatic group, examples of the aromatic group include an aryl group and a substituted aryl group. The number of carbon atoms in the aryl group is 6
To 30 are preferable, and 6 to 20 are more preferable. The preferred range of the number of carbon atoms in the aryl portion of the substituted aryl group is the same as that of the aryl group. Examples of the aryl group include a phenyl group, an α-naphthyl group, and a β-naphthyl group. Examples of the substituent of the substituted aryl group include the same substituents as in the case of the above-mentioned substituted alkyl group.

When R ₁ and R ₂ represent a heterocyclic group, the heterocyclic group includes a substituted heterocyclic group and an unsubstituted heterocyclic group. As the heterocyclic group represented by R ₁ and R ₂ ,
A heterocyclic group having 4 to 13 carbon atoms is preferred. Examples of such a heterocyclic group include a nitrogen-containing atom, an oxygen-containing atom, and a sulfur-containing heterocyclic ring. More specifically, a pyridine ring,
Pyridazine ring, pyrimidine ring, pyridazone ring, quinoline ring, isoquinoline ring, quinoxaline ring, acridine ring,
Examples thereof include a furan ring, an oxazole ring, a thiazole ring, an oxadiazole ring, a thiazoline ring, a thiophene ring, and an indole ring. When R ₁ and R ₂ represent a heterocyclic group having a substituent, examples of the substituent include the same substituents as described above when R ₁ and R ₂ have a substituent.

In particular, R ₁ and R ₂ represent an unsubstituted alkyl group (for example, a methyl group, an ethyl group, an n-propyl group,
Butyl, n-pentyl, n-hexyl, octyl, octadecyl, etc.) or substituted alkyl groups. Preferred examples of the substituted alkyl group include an alkoxyalkyl group (eg, methoxyethyl group, phenoxyethyl group, etc.) and an alkoxycarbonylalkyl group (eg, butoxycarbonylmethyl group, phenoxyethoxycarbonylmethyl group, etc.). Also, R ₁
And R ₂ may be mutually bonded to other adjacent substituents to form a ring, for example, 5
And 6-membered heterocycles.

In the general formula (1), Z ₁ and Z
₂ independently represents a substituent required for the compound represented by the general formula (1) to become a dye. Examples of the substituent include a group capable of forming a conjugated chain.

Among the compounds represented by the general formula (1), a compound represented by the following general formula (3) is preferable.

[0066]

Embedded image

In the general formula (3), L ₁ and L ₂ each independently represent a methine group which may be substituted. L
_{When 1} and L ₂ represent a methine group, the methine group includes a methine group having a substituent and an unsubstituted methine group. L
_{When 1} and L ₂ represent a methine group having a substituent, examples of the substituent include the same substituents as described above when R ₁ and R ₂ have a substituent. May form a ring (for example, a 5- or 6-membered carbon ring), or may form a ring with an auxochrome.

In the general formula (3), G ¹ and G ² each independently represent an electron-withdrawing group, or form an aromatic ring or a heterocyclic ring by combining G ¹ and G ² . G ¹ and G
Examples of the electron-withdrawing group represented by ² include an acetyl group, a propionyl group, a pivaloyl group, a chloroacetyl group, a trifluoroacetyl group, a 1-methylcyclopropylcarbonyl group, a 1-ethylcyclopropylcarbonyl group, and a 1-benzylcyclopropylcarbonyl Group, benzoyl group, 4-
Methoxybenzoyl group, acyl group such as thenoyl group, methoxycarbonyl group, ethoxycarbonyl group, 2-methoxyethoxycarbonyl group, oxycarbonyl group such as 4-methoxyphenoxycarbonyl group, carbamoyl group,
N, N-dimethylcarbamoyl group, N, N-diethylcarbamoyl group, N-phenylcarbamoyl group, N-2,
4-bis (pentyloxy) phenylcarbamoyl group,
Carbamoyl groups such as N-2,4-bis (octyloxy) phenylcarbamoyl group and morpholinocarbonyl group;
Cyano group, methanesulfonyl group, benzenesulfonyl group, sulfonyl group such as toluenesulfonyl group, phosphono group such as diethylphosphono group, benzoxazole-2-
Heterocyclic groups such as yl, benzothiazol-2-yl, 3,4-dihydroquinazolin-4-one-2-yl, and 3,4-dihydroquinazolin-4-sulfon-2-yl are preferred.

The “electron-withdrawing group” means a substituent having a positive Hammett σ value. Here, the σ value is determined by the “Activity Correlation of Drugs—Guideline for Drug Design and Mechanism of Action”, pages 96 to 103 of “Sensitization of Chemistry”, Sensitization No. 122, edited by Structure-Activity Relationship Society, edited by Nankodo and Corbin.・ Hash (Corwin Hansch), Albert ・
Albert Leo, "Subtitant Constants for Correlation Analysis in Chemistry and Biology"
(Substitute Constants fo
r Correlation Analysis in
Chemistry and Biology) 69
~ 161 pages, John Wiley & Sons (Jh
on Wiley and Sons, Corwin Hansch, A. Leo, RW Taft, Chemical Review (Che)
medical Reviews) Vol. 91, No. 165-19
It is described on page 5 and the like. Further, for a substituent whose σ _p is unknown, Chemical Review (Chemical Review)
Reviews, Vol. 17, pp. 125-136 (193)
It can be measured and determined by the method described in 5).

When G ¹ and G ² are bonded to form an aromatic ring, examples of the aromatic ring include benzene, naphthalene, and anthracene.

When G ¹ and G ² are combined to form a heterocyclic ring, the heterocyclic ring includes a 5- or 6-membered heterocyclic ring. The 5- or 6-membered heterocyclic nucleus formed by G ¹ and G ² includes a thiazole nucleus ｛a thiazole nucleus (for example,
Thiazole, 4-methylthiazole, 4-phenylthiazole, 4,5-dichlorothiazole), benzothiazole nucleus (for example, benzothiazole, 4-chlorobenzothiazole, 5-chlorobenzothiazole, 6-chlorobenzothiazole, 5-nitro Benzothiazole, 5-
Methylbenzothiazole, 5-phenylbenzothiazole, 5-ethoxybenzothiazole, 5-ethoxycarbonylbenzothiazole, 5-phenoxybenzothiazole, 5-fluorobenzothiazole, 5-trifluoromethylbenzothiazole, 5-chloro-6-methyl Benzothiazole, tetrahydrobenzothiazole, 4-
Phenylbenzothiazole, 5,6-bismethylthiobenzothiazole),

Naphthothiazole nucleus (for example, naphtho [2,1-d] thiazole, naphtho [1,2-d] thiazole, naphtho [2,3-d] thiazole, 5-methoxynaphtho [1,2-d] Thiazole, 7-ethoxynaphtho [2,1-d] thiazole, 8-methoxynaphtho [2,1-d] thiazole, 5-methoxynaphtho [2
3-d] thiazole), 8-methylthionaphtho [2,1
-D] thiazole｝, a thiazoline nucleus (for example, thiazoline, 4-methylthiazoline, 4-nitrothiazoline),
Oxazole nucleus ｛Oxazole nucleus (eg, oxazole, 4-methyloxazole, 4-nitrooxazole, 4-phenyloxazole, 4,5-diphenyloxazole, 4-ethyloxazole), benzoxazole nucleus (eg, benzoxazole, 5-chloro) Benzoxazole, 5-methylbenzoxazole, 5
-Fluorobenzoxazole, 5-phenylbenzoxazole, 5-nitrobenzoxazole, 5-trifluoromethylbenzoxazole, 5-acetylbenzoxazole), naphthooxazole nucleus (for example, naphtho [2,1-d] oxazole, naphtho [ 1,2-
d] oxazole, naphtho [2,3-d] oxazole, 5-nitronaphtho [2,1-d] oxazole)},

Oxazoline nucleus (for example, 4,4-dimethyloxazoline), selenazole nucleus selenazole nucleus (for example, 4-methyl selenazole, 4-nitro selenazole, 4-phenyl selenazole), benzo selenazole nucleus (for example, Benzoselenazole, 5-chlorobenzoselenazole, 5-nitrobenzoselenazole, 6-
Nitrobenzoselenazole, 5-chloro-6-nitrobenzoselenazole, 5,6-dimethylbenzoselenazole), naphthoselenazole nucleus (for example, naphtho [2,1
-D] selenazole, naphtho [1,2-d] selenazole)}, selenazoline nucleus (for example, selenazoline, 4-
Methyl selenazoline), a tellurazole nucleus and a tellurazole nucleus (for example, tellurazole, 4-methyltellurazole,
4-phenyltellurazole), benzotellurazole nucleus (for example, benzotellurazole, 5-chlorobenzotellurazole, 5-methylbenzotellurazole, 5,6-dimethylbenzotellurazole, 6-methoxybenzotellurazole), naphtho Tellurazole nucleus (for example, naphtho [2,1-d] tellurazole, naphtho [1,2-d] tellurazole)},

A tellurazoline nucleus (for example, tellurazoline,
4-methyltellrazoline), 3,3-dialkylindolenine nucleus (for example, 3,3-dimethylindolenine,
3,3-diethylindolenine, 3,3-dimethyl-5
-Cyanoindolenine, 3,3-dimethyl-6-nitroindolenine, 3,3-dimethyl-5-nitroindolenine, 3,3-dimethyl-5-methoxyindolenine,
3,3,5-trimethylindolenine, 3,3-dimethyl-5-chloroindolenine),

Imidazole nucleus: imidazole nucleus (eg, 1-alkylimidazole, 1-alkyl-4-phenylimidazole, 1-arylimidazole), benzimidazole nucleus (eg, 1-alkylbenzimidazole, 1-alkyl-5-chloro) Benzimidazole, 1-alkyl-5,6-dichlorobenzimidazole, 1-alkyl-5-cyanobenzimidazole, 1
-Alkyl-5-fluorobenzimidazole, 1-alkyl-5-trifluoromethylbenzimidazole,
1-alkyl-6-chloro-5-cyanobenzimidazole, 1-alkyl-6-chloro-5-trifluoromethylbenzimidazole, 1-allyl-5,6-dichlorobenzimidazole, 1-arylbenzimidazole), naphtho Imidazole nucleus (for example, 1-alkylnaphtho [1,2-d] imidazole)}. In the examples of the imidazole nucleus, examples of the alkyl group include an alkyl group having 1 to 8 carbon atoms, for example, an unsubstituted alkyl group such as methyl, ethyl, propyl, isopropyl, and butyl, and a hydroxyalkyl group (for example, 2-hydroxyethyl, 3
-Hydroxypropyl) is preferred, and a methyl group and an ethyl group are particularly preferred. In the examples of the imidazole nucleus, examples of the aryl group include phenyl, halogen (eg, chloro) substituted phenyl, alkyl (eg, methyl) substituted phenyl, and alkoxy (eg, methoxy) substituted phenyl.

The 5- or 6-membered heterocyclic nucleus formed by G ¹ and G ² includes a dithiol nucleus and a dithiol nucleus (for example, 1,3-dithiol, 4-chloro-1,
3-dithiol, 4,5-dialkoxycarbonyl-
1,3-dithiol), 4,5-benzo-1,3-dithiol nucleus, 4,5-naphth-1,3-dithiol nucleus},
Dithiolane nucleus (eg, 1,3-dithiolane, 4-fluoro-1,3-dithiolane), dioxysole nucleus ｛dioxole nucleus (eg, 1,3-dioxole, 4-methyl-1,3-dioxole), 4,5 -Benzo-1,3
-Dioxol nucleus, 4,5-naphth-1,3-dioxol nucleus}, dioxolane nucleus (for example, 1,3-dioxolane, 4-trifluoromethyl-1,3-dioxolane). In the examples of the dithiol nucleus, the alkoxycarbonyl group is preferably an alkoxycarbonyl group having 2 to 9 carbon atoms, for example, an alkoxycarbonyl group such as methoxycarbonyl, ethoxycarbonyl, butoxycarbonyl and the like.

Further, 5 formed by G ¹ and G ²
As the 6-membered or 6-membered heterocyclic nucleus, a pyridine nucleus (for example,
2-pyridine, 4-pyridine, 5-methyl-2-pyridine, 3-methyl-4-pyridine), quinoline nucleus ｛quinoline nucleus (for example, 2-quinoline, 3-methyl-2-quinoline, 5-ethyl-2) -Quinoline, 6-methyl-2-quinoline, 6-nitro-2-quinoline, 8-fluoro-2-
Quinoline, 6-methoxy-2-quinoline, 6-hydroxy-2-quinoline, 8-chloro-2-quinoline, 4-quinoline, 6-ethoxy-4-quinoline, 6-nitro-4
-Quinoline, 8-chloro-4-quinoline, 8-fluoro-4-quinoline, 8-methyl-4-quinoline, 8-methoxy-4-quinoline, 6-methyl-4-quinoline, 6-
Methoxy-4-quinoline, 6-chloro-4-quinoline,
5,6-dimethyl-4-quinoline), isoquinoline nucleus (for example, 6-nitro-1-isoquinoline, 3,4-dihydro-1-isoquinoline, 6-nitro-3-isoquinoline)}, imidazo [4,5- b] quinoxaline nucleus (for example, 1,3-diethylimidazo [4,5-b] quinoxaline, 6-chloro-1,3-diallylimidazo [4,
5-b] quinoxaline, 6-chloro-1,3-dibenzylimidazo [4,5-b] quinoxaline, 6-chloro-
1,3-diphenylimidazo [4,5-b] quinoxalin, 6-nitro-1,3-diallylimidazo [4,5-
b) quinoxalin),

Oxadiazole nucleus, thiadiazole nucleus,
Pyrimidine nucleus, imidazo [4,5-b] pyrazine nucleus (for example, 1,3-diethyl [4,5-b] pyrazine, 1,3
-Diallyl [4,5-b] pyrazine), imidazo [4,
5-b] 1,4-quinone nucleus, pyrrolopyridine nucleus, pyrazolopyridine nucleus, 1,3,3a, 7-tetraazaindene nucleus, indolizine nucleus, 1,8-naphthyridine nucleus, pyran nucleus (for example, α -Pyran, γ-pyran, benzo-α-pyran, benzo-γ-pyran), a thiapiran nucleus (for example,
α-thiapiran, γ-thiapiran, benzo-α-thiapiran, benzo-γ-thiapiran), indolenine nucleus,

[0079]

Embedded image

And the like.

In the general formula (3), m represents an integer of 0 to 3. Further, R _1, R _2, and Q ₃ have the same meaning as R _1, R _2, and Q ₃ in the general formula (1).

A) -2 General formulas (2) and (4)
Compound represented by

[0083]

Embedded image

In the general formula (2), R ₃ and R
₄ each independently represents a hydrogen atom or a monovalent substituent. As the monovalent substituent, a substituted or unsubstituted alkyl group (for example, methyl group, ethyl group, propyl group, butyl group, hydroxyethyl group, trifluoromethyl group, benzyl group, sulfopropyl group, diethylaminoethyl group,
Cyanopropyl group, adamantyl group, p-chlorophenethyl group, ethoxyethyl group, ethylthioethyl group, phenoxyethyl group, carbamoylethyl group, carboxyethyl group, ethoxycarbonylmethyl group, acetylaminoethyl group, etc.), substituted or unsubstituted Aryl group (for example,
Phenyl group, naphthyl group, p-carboxyphenyl group,
3,5-dicarboxyphenyl group, m-sulfophenyl group, p-acetamidophenyl group, 3-caprylamidophenyl group, p-sulfamoylfetyl group, m-hydroxyphenyl group, p-nitrophenyl group, 3 , 5-dichlorophenyl group, p-anisyl group, o-anisyl group,
p-cyanophenyl group, p-N-methylureidophenyl group, m-fluorophenyl group, p-tolyl group, m-tolyl group, etc.),

A substituted or unsubstituted alkylthio group or a substituted or unsubstituted arylthio group (eg, a methylthio group, an ethylthio group, a sulfobutylthio group, a phenylthio group, etc.), a halogen atom (eg, a chlorine atom, a bromine atom,
Fluorine atom), carbamoyl group, sulfamoyl group,
A substituted or unsubstituted acyl group (eg, acetyl group, benzoyl group, etc.), a substituted or unsubstituted alkoxycarbonyl group (eg, methoxycarbonyl group), a substituted or unsubstituted aryloxycarbonyl group (eg, phenoxycarbonyl group, etc.) ), Carboxyl group, formyl group, substituted amino group, nitrile group and the like. In the general formula (2), R ₃ and R ₄ may be bonded to each other to form an aromatic ring or a heterocyclic ring.

In the general formula (2), Z ₃ and Z
₄ independently represents a substituent necessary for the compound represented by the general formula (2) to become a dye. Examples of the substituent represented by Z ₃ and Z ₄ include a group capable of forming a conjugated chain.

Among the compounds represented by the general formula (2), a compound represented by the following general formula (4) is preferable.

[0088]

Embedded image

In the general formula (4), L ₁ and L
₂ each independently represents a methine group which may be substituted; The methine group L ₁ and L ₂ represents the general formula (3) has the same meaning as methine group represented by L ₁ and L ₂ in preferred examples are also the same. In the general formula (4), G ₁ and G ₂ each independently represent an electron-withdrawing group or form an aromatic ring or a heterocyclic ring by bonding G ₁ and G ₂ . Examples of the electron withdrawing group represented by G ₁ and G _2, have the same meanings as electron-withdrawing group represented by G ₁ and G ₂ in the general formula (3), and preferred examples are also the same. When forming an aromatic ring or a heterocyclic ring bonded with G ₁ and G _2, Examples of the aromatic ring and heterocyclic, aromatic ring or heterocyclic ring bonded to at G ₁ and G ₂ in the general formula (3) The same aromatic rings and heterocyclic rings (heterocyclic nuclei) as those exemplified in the case of formation are exemplified. In the general formula (4), m represents an integer of 0 to 3. Also, R ₃
And R ₄ have the same meanings as R ₃ and R ₄ in formula (2).

The following formulas (1) to (4)
Exemplary compounds 1 to 97 of the compound represented by are shown below, but the compounds used in the present invention are not limited to the following exemplary compounds.

[0091]

Embedded image

[0092]

Embedded image

[0093]

Embedded image

[0094]

Embedded image

[0095]

Embedded image

[0096]

Embedded image

[0097]

Embedded image

[0098]

Embedded image

[0099]

Embedded image

[0100]

Embedded image

[0101]

Embedded image

[0102]

Embedded image

[0103]

Embedded image

[0104]

Embedded image

In the photopolymerization initiator used in the first to third embodiments, the photopolymerization initiators represented by the general formulas (1) to (4)
Are each a radical generator 1 described below.
It is preferably contained in an amount of 0.01 to 5% by weight, more preferably 0.05 to 2% by weight, based on parts by weight.

A) Organic Boron Compound or Radical Generator Represented by Formula (A) In the photopolymerization initiator used in the first embodiment, the organic boron compound represented by Formula (A) When the existing compound represented by the general formula (1) absorbs light, the compound interacts with the compound to generate radicals and the like with high efficiency, and initiates polymerization of the monomer compound present in the vicinity. Having.

[0107]

Embedded image

In the general formula (A), Ra ¹ , R
a ^2, and Ra ³ are each independently an aliphatic group, an aromatic group, a heterocyclic group, or an -SiRa ⁵ Ra ⁶ Ra ^7. Ra ⁴ represents an aliphatic group. Ra ^{1 to} Ra ³ and Ra ⁴
Represents an aliphatic group, examples of the aliphatic group include an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an alkynyl group, a substituted alkynyl group, an aralkyl group, and a substituted aralkyl group. Among them, an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aralkyl group or a substituted aralkyl group is preferable, and an alkyl group and a substituted alkyl group are particularly preferable. Further, the aliphatic group may be a cyclic aliphatic group or a chain aliphatic group. The chain aliphatic group may have a branch.

Examples of the alkyl group include linear, branched and cyclic alkyl groups. The alkyl group preferably has 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms. The preferred range of the number of carbon atoms in the alkyl portion of the substituted alkyl group is the same as in the case of the alkyl group. The alkyl group may be a substituted alkyl group or an unsubstituted alkyl group.
Examples of the alkyl group include methyl, ethyl, propyl, butyl, pentyl, hexyl, cyclopentyl, neopentyl, isopropyl, isobutyl, cyclohexyl, octyl, 2-ethylhexyl, decyl, A dodecyl group, an octadecyl group and the like.

Examples of the substituent of the substituted alkyl group include a carboxyl group, a sulfo group, a cyano group, a halogen atom (for example, a fluorine atom, a chlorine atom, and a bromine atom), a hydroxy group, and an alkoxycarbonyl group having 30 or less carbon atoms (for example, , A methoxycarbonyl group, an ethoxycarbonyl group, a benzyloxycarbonyl group), an alkylsulfonylaminocarbonyl group having 30 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 30 or less carbon atoms, An alkoxy group having 30 or less carbon atoms (eg, a methoxy group, an ethoxy group, a benzyloxy group, a phenethyloxy group, etc.) and an alkylthio group having 30 or less carbon atoms (eg,
A methylthio group, an ethylthio group, a methylthioethylthioethyl group, etc., an aryloxy group having 30 or less carbon atoms (eg, a phenoxy group, a p-tolyloxy group, a 1-naphthoxy group, a 2-naphthoxy group, etc.), a nitro group, a carbon number An alkyl group having 30 or less, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 30 or less carbon atoms (eg, acetyloxy group, propionyloxy group, etc.), an acyl group having 30 or less carbon atoms (eg, acetyl group, Propionyl group, benzoyl group, etc.), carbamoyl group (eg, carbamoyl group, N, N-dimethylcarbamoyl group, morpholinocarbonyl group, piperidinocarbonyl group, etc.), sulfamoyl group (eg, sulfamoyl group, N, N-dimethylsulfur) Famoyl group, morpholinosulfonyl , Or a piperidinosulfonyl group), aryl group having 30 or less carbon atoms (e.g., phenyl group, 4-
A chlorophenyl group, a 4-methylphenyl group, an α-naphthyl group, etc.), a substituted amino group (eg, an amino group, an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, an acylamino group, etc.), a substituted ureido group, Examples include a substituted phosphono group and a heterocyclic group. Here, the carboxyl group, sulfo group, hydroxy group, and phosphono group may be in a salt state. At that time, examples of the cation forming a salt include Y ⁺ described below.

Examples of the alkenyl group include linear, branched and cyclic alkenyl groups. The alkenyl group preferably has 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms. For the alkenyl portion of the substituted alkenyl group,
The preferred range of the number of carbon atoms is the same as in the case of the alkenyl group. The alkenyl group may be a substituted alkenyl group or an unsubstituted alkenyl group. Examples of the substituent of the substituted alkenyl group include the same substituents as in the case of the substituted alkyl group.

Examples of the alkynyl group include linear, branched and cyclic alkynyl groups. The alkynyl group preferably has 2 to 30 carbon atoms, more preferably 2 to 20 carbon atoms. The preferred range of the number of carbon atoms in the alkynyl portion of the substituted alkynyl group is the same as in the case of the alkynyl group. Further, the alkynyl group may be either an alkynyl group having a substituent or an unsubstituted alkynyl group. Examples of the substituent of the substituted alkynyl group include the same substituents as in the case of the above-mentioned substituted alkyl group.

Examples of the aralkyl group include linear, branched and cyclic aralkyl groups. The aralkyl group preferably has 7 to 35 carbon atoms, more preferably 7 to 25 carbon atoms. Of the aralkyl moiety of the substituted aralkyl group,
The preferred range of the number of carbon atoms is the same as in the case of the aralkyl group. Further, the aralkyl group may be either an aralkyl group having a substituent or an unsubstituted aralkyl group. As the substituent of the substituted aralkyl group,
The same substituents as in the case of the above-mentioned substituted alkyl group can be mentioned.

When Ra ^{1 to} Ra ³ represent an alkyl group of an aromatic group, the aromatic group includes, for example, an aryl group,
And substituted aryl groups. The number of carbon atoms in the aryl group is preferably from 6 to 30, and more preferably from 6 to 20. The preferred range of the number of carbon atoms in the aryl portion of the substituted aryl group is the same as that of the aryl group. Examples of the aryl group include a phenyl group, an α-naphthyl group, and a β-naphthyl group. Examples of the substituent of the substituted aryl group include the same substituents as in the case of the above-mentioned substituted alkyl group.

When Ra ^{1 to} Ra ³ represent a heterocyclic group, examples of the heterocyclic group include a heterocyclic group having a substituent and an unsubstituted heterocyclic group. Examples of the substituent of the heterocyclic group having a substituent include the same substituents as those exemplified when Ra ^{1 to} Ra ³ represent an aryl group having a substituent. Among them, the heterocyclic group represented by Ra ^{1 to} Ra ³ is preferably a heterocyclic group containing a nitrogen atom, a sulfur atom, or an oxygen atom such as a furan ring, a pyrrole ring, an imidazole ring, an oxazole ring, a thiazole ring, and a pyridine ring. .

When Ra ^{1 to} Ra ³ represent —SiRa ⁵ Ra ⁶ Ra ⁷ , Ra ⁵ , Ra ⁶ and Ra ⁷ each independently represent
Represents an aliphatic group or an aromatic group. Ra ^5, Ra ⁶ and Ra ⁷
Each independently represents an aliphatic group or an aromatic group. The aliphatic group and the aromatic group have the same meanings as the aliphatic group represented by Ra ^{1 to} Ra ³ and Ra ⁴ , and the aromatic group represented by Ra ^{1 to} Ra ³ ,
Preferred examples are also the same.

In the formula (A), Ra ¹ , R
Two or more of a ² , Ra ³ , and Ra ⁴ may be linked directly or via a substituent to form a ring. When a ring is formed, the ring includes the following (C1) to (C
Any ring selected from the rings of 3) is preferable, and among them, the ring of (C2) is preferable.

[0118]

Embedded image

In the ring (C1), Rb represents the following divalent group.

[0120]

Embedded image

In the general formula (A), Ra ¹ to Ra ³ are an aryl group and Ra
Preferably, ⁴ is an alkyl group. In particular, a triarylalkyl-type organoboron compound in which an aryl group is substituted with an electron-withdrawing group is preferable. Among them, Hammet of substituents (electron-withdrawing groups) on three aryl groups is preferable.
It is more preferable that the sum of (σ) values is +0.36 to +2.58. As the electron withdrawing group, a halogen atom,
A trifluoromethyl group is preferable, and a fluorine atom and a chlorine atom are more preferable.

The aryl group substituted by the electron-withdrawing group includes a 3-fluorophenyl group, a 4-fluorophenyl group, a 2-fluorophenyl group, a 3-chlorophenyl group,
4-chlorophenyl group, 3-trifluoromethylphenyl group, 4-trifluoromethylphenyl group, 3,5-difluorophenyl group, 4-bromophenyl group, 3,4-
Examples include a difluorophenyl group, a 5-fluoro-2-methylphenyl group, a 5-fluoro-4-methylphenyl group, a 5-chloro-2-methylphenyl group, and a 5-chloro-4-methylphenyl group.

Specific examples of the anion moiety of the general formula (A) include, for example, tetramethyl borate, tetraethyl borate, tetrabutyl borate, triisobutyl methyl borate, di-n-butyl-di-t-butyl borate, -N-butyl borate, tri-m-chlorophenyl-n-hexyl borate, triphenylmethyl borate, triphenylethyl borate, triphenylpropyl borate, triphenyl-n-butyl borate,
Trimesityl butyl borate, tolyl isopropyl borate, triphenylbenzyl borate, m-fluoro-tetrabenzyl borate, triphenylphenethyl borate, triphenyl-p-chlorobenzyl borate, triphenylethenyl butyl borate, di (α-naphthyl) -Dipropyl borate, tri-n-butyl (dimethylphenylsilyl) borate, diphenyl dihexyl borate, tri-m-fluorophenylhexyl borate, tri- (5-chloro-4-methylphenyl) hexyl borate, tri-m-fluoro Phenylcyclohexyl borate, tri-m-fluorophenylbenzyl borate, tri- (5-fluoro-2-methylphenyl)
Hexyl borate and the like can be mentioned.

In the general formula (A), Y ⁺ represents a group capable of forming a cation. Among them, an organic cationic compound, a transition metal coordination complex cation (such as the compound described in Japanese Patent No. 2791143), or a metal cation (for example, N 2
a ⁺ , K ⁺ , Li ⁺ , Ag ⁺ , Fe ²⁺ , Fe ³⁺ , Cu ⁺ , C
u ²⁺ , Zn ²⁺ , Al ³⁺ , 1 / 2Ca ^2+, etc.).
Examples of the organic cationic compound include a quaternary ammonium cation, a quaternary pyridinium cation, a quaternary quinolinium cation, a phosphonium cation, an iodonium cation, a sulfonium cation, and a dye cation.

As the quaternary ammonium cation,
Examples include tetraalkylammonium cations (eg, tetramethylammonium cation, tetrabutylammonium cation), tetraarylammonium cations (eg, tetraphenylammonium cation), and the like. As the quaternary pyridinium cation,
N-alkylpyridinium cations (eg, N-methylpyridinium cations), N-arylpyridinium cations (eg, N-phenylpyridinium cations), N-alkoxypyridinium cations (eg,
4-phenyl-N-methoxy-pyridinium cation), N-benzoylpyridinium cation and the like. Examples of the quaternary quinolinium cation include an N-alkyl quinolinium cation (for example, N-methyl quinolinium cation) and an N-aryl quinolinium cation (for example, N-phenyl quinolinium cation). Can be Examples of the phosphonium cation include a tetraarylphosphonium cation (eg, a tetraphenylphosphonium cation). Examples of the iodonium cation include a diaryliodonium cation (for example, a diphenyliodonium cation). Examples of the sulfonium cation include a triarylsulfonium cation (for example, a triphenylsulfonium cation).

Further, as specific examples of the above Y ⁺ , paragraphs [0020] to [0] of JP-A-9-188686.
[038].

In each of the cationic compounds (exemplary compounds) exemplified above, the alkyl group is preferably an alkyl group having 1 to 30 carbon atoms, for example, a methyl group,
Unsubstituted alkyl groups such as an ethyl group, a propyl group, an isopropyl group, a butyl group, and a hexyl group, and the above-mentioned substituted alkyl groups represented by Ra ^{1 to} Ra ⁴ are preferable. Among them, in particular, carbon number 1
~ 12 alkyl groups are preferred. In each of the cationic compounds exemplified above, examples of the aryl group include a phenyl group, a halogen atom (eg, a chlorine atom) -substituted phenyl group, and an alkyl (eg, a methyl group)
A substituted phenyl group and an alkoxy (for example, methoxy group) substituted phenyl group are preferred.

Specific examples of the organic boron compound represented by the general formula (A) include US Pat. No. 3,567,453.
No. 4,343,891, JP-A-62
JP-A-143044, JP-A-62-150242, JP-A-9-188684, JP-A-9-188
No. 685, JP-A-9-188686, JP-A-9-188710, JP-B8-9643,
The compounds described in JP-A-11-269210 and the compounds (b-1 to 33) exemplified below are exemplified. The organic boron compound may be used in combination with a radical generator described below. However, the organic boron compound used in the present invention is not limited to this.

[0129]

Embedded image

[0130]

Embedded image

[0131]

Embedded image

[0132]

Embedded image

[0133]

Embedded image

In the photopolymerization initiator used in the first embodiment, the organic boron compound represented by the general formula (A) is based on the content of the monomer compound forming the photopolymerizable photosensitive resin layer. 0.01-20% by weight is preferred,
0.1 to 10% by weight is more preferred. However, the preferable range varies depending on the type of the “monomer compound forming the photopolymerizable photosensitive resin layer” to be used in combination, and is not limited thereto.

The photopolymerization initiator used in the second embodiment is
It comprises a compound represented by the general formula (2) and a compound (radical generator) capable of generating a radical by interacting with the compound represented by the general formula (2), and is used in the third embodiment. The photopolymerization initiator comprises a compound represented by the general formula (3) and a compound capable of generating a radical by interacting with the compound represented by the general formula (3) (radical generator). When the compound represented by the general formula (2) or the general formula (3) present in the vicinity absorbs light, the radical generator interacts with the compound to generate a radical, and generates a radical in the vicinity. It has a function of initiating a polymerization reaction of a monomer compound that forms an existing photopolymerizable photosensitive resin layer. In the photopolymerization initiators according to the second and third aspects, the radical generator may be an organic boron represented by the general formula (A) from the viewpoint that radicals can be generated with high efficiency and sensitivity is further improved. Compounds are preferred.
In the photopolymerization initiators of the second and third embodiments, when the organic boron compound represented by the general formula (A) is used as the radical generator, the preferred range of the content is as follows. Same as the embodiment.

Examples of the radical generator include benzophenone, camphorquinone, 4,4-bis (dimethylamino) benzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 4,4'-dimethoxybenzophenone, and 4-dimethylaminobenzophenone. , 4-dimethylaminoacetophenone, benzylanthraquinone, 2
Bisacyl such as -tert-butylanthraquinone, 2-methylanthraquinone, xanthone, thioxanthone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, fluorenone, acridone, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide Phosphine oxides, Lucirin TP
Aromatic ketones such as acylphosphine oxides such as O, α-hydroxy or α-aminoacetophenones, α-hydroxycycloalkylphenyl ketones, and dialkoxyacetophenones;

Benzoin and benzoin ethers such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether and benzoin phenyl ether; 2- (o-chlorophenyl) -4,5-diphenylimidazole dimer, 2- (o-chlorophenyl) ) -4,5-di (m-methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4,5-diphenylimidazole dimer, 2- (o-methoxyphenyl) -4,5- Diphenylimidazole dimer, 2-
2,4,6-triarylimidazole dimers such as (p-methoxyphenyl) -4,5-diphenylimidazole dimer, and other U.S. Patent Nos. 3,784,557 and 42.
Nos. 52887, 4311783, 4459349
Nos. 4,410,621 and 4,622,286;

Polyhalogen compounds such as carbon tetrabromide, phenyltribromomethylsulfone and phenyltrichloromethylketone; JP-A-59-133428, JP-B-57
No.-1819, JP-B-57-6096, U.S. Pat.
A compound described in 615455;

2,4,6-tris (trichloromethyl)
-S-triazine, 2-methoxy-4,6-bis (trichloromethyl) -S-triazine, 2-amino-4,6
-Bis (trichloromethyl) -S-triazine, 2-
JP-A-58-29803 such as (P-methoxystyryl) -4,6-bis (trichloromethyl) -S-triazine
S-triazine derivatives having a trihalogen-substituted methyl group described in (1);

Methyl ethyl ketone peroxide, cyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, benzoyl peroxide, di-tert-butyldiperoxyisophthalate, 2,5-dimethyl-2,5-di (benzoylperoxy) ) Hexane, tertiary-butylperoxybenzoate, a, a'-bis (tertiary-butylperoxyisopropyl) benzene, dicumyl peroxide, 3,3 ', 4,4'-tetra- (tertiary-butylperoxycarbonyl) ) Japanese Patent Application Laid-Open No.
Organic peroxides described in No. 9-189340;

Azinium salts described in US Pat. No. 4,743,530; organic boron compounds described above; phenylglyoxalic esters such as phenylglyoxalic acid methyl ester; bis (η ⁵ -2,4-cyclopentadiene- 1
- yl) - bis (2,6-difluoro-3-(1H-pyrrol-1-yl) - phenyl) titanocene such as titanium; eta ⁵ - cyclopentadienyl eta ⁶ - cumenyl -
Iron (1 +)-hexafluorophosphate (1
-) And the like; diaryliodonium salts such as a diphenyliodonium salt; and triarylsulfonium salts such as a triphenylsulfonium salt.

For more detailed examples of the radical generator and other examples of the radical generator, refer to paragraphs [0067] to [0] of JP-A-10-45816.
132].

Further, as the radical generator, a material comprising a combination of two or more compounds can be used. For example, a combination of 2,4,5-triarylimidazole dimer with mercaptobenzoxazole and the like, 4,4 described in U.S. Pat. No. 3,427,161.
Combination of 4'-bis (dimethylamino) benzophenone, benzophenone and benzoin methyl ether, benzoyl-N described in U.S. Pat. No. 4,239,850.
Combination of -methylnaphthothiazoline and 2,4-bis (trichloromethyl) -6- (4'-methoxyphenyl) -triazole, dialkylaminobenzoate and dimethylthioxanthone described in JP-A-57-23602. And three combinations of 4,4'-bis (dimethylamino) benzophenone, benzophenone and a polymethyl halide compound described in JP-A-59-78339.

In the case of a radical generator comprising a combination of two or more kinds, a combination of 4,4′-bis (diethylamino) benzophenone and benzophenone, a combination of 2,4-diethylthioxanthone and ethyl 4-dimethylaminobenzoate, Alternatively, it is preferable to use a combination of 4,4′-bis (diethylamino) benzophenone and 2,4,5-triarylimidazole dimer.

Of the above radical generators,
Organic boron compounds, diaryliodonium salts, iron arene complexes, S-triazine derivatives having a trihalogen-substituted methyl group, organic peroxides, Oxides, titanocene, 2,4,5-triarylimidazole dimer, or azinium salt compounds are preferred, and organoboron compounds are particularly preferred. The organoboron compound is
Even when a spectral sensitizing dye is used as the spectral sensitizing compound, it is preferable in that the coexisting spectral sensitizing dye can be satisfactorily decolored when the image is fixed by light irradiation. The organic boron compound may be used in combination with the above-mentioned radical generator.

Examples of the organic boron compound include a compound represented by the above general formula (A) and “Functional dye chemistry”.
(1981, CMC Publishing Co., pp. 393-41
6) and “color materials” (60 [4] 212-224 (198
The spectral sensitizing dye-based organic boron compound having the cationic dye described in 7)) or the like as a cation part in the structure is also included. Examples of the spectral sensitizing dye-based organic boron compounds include JP-A-62-143044 and JP-A-1-1382.
No. 04, JP-A-6-505287, JP-A-4-261
No. 406 and the like.

As the dye constituting the cation portion of the spectral sensitizing dye-based organic boron compound, a cationic dye having a maximum absorption wavelength in a wavelength region of 300 nm or more, preferably 400 to 1100 nm is used. Can be. Among them, cationic methine dye, polymethine dye, triarylmethane dye, indoline dye, azine dye, xanthene dye, cyanine dye, hemicyanine dye, rhodamine dye, azomethine dye, oxazine dye or acridine dye are preferable, and cationic cyanine dye is preferable. Dyes, hemicyanine dyes, rhodamine dyes or azomethine dyes are more preferred.

In the photopolymerization initiator used in the second and third embodiments, the content of the radical generator is as follows.
The same as the case of the organoboron compound represented by the general formula (A) in the photopolymerization initiator of the first embodiment, and a preferable range thereof is a monomer compound which forms a photopolymerization photosensitive resin layer. However, the present invention is not limited to this, because it varies depending on the type of the data.

The content of the photopolymerization initiator in the photopolymerizable photosensitive resin layer is preferably 0.01 to 20% by weight based on the content of the monomer compound in the photopolymerizable photosensitive resin layer. 0.1 to 15% by weight, more preferably 0.5 to 10% by weight.
% By weight is particularly preferred. When the content of the photopolymerization initiator is 0.
If it is less than 01% by weight, the sensitivity is insufficient, and if it exceeds 20% by weight, the whiteness of the non-image area is reduced. In addition, of all the photopolymerization initiators used, in addition to the spectral sensitizing dye / borate compound ratio (1/1 in molar ratio) necessary for the photopolymerization reaction, the spectral sensitizing dye remaining in the layer was sufficiently removed. It is particularly preferable to add a borate compound in an amount necessary for decoloring from the viewpoint of obtaining sufficiently high sensitivity and decoloring performance. That is, the ratio of spectral sensitizing dye / borate compound is preferably used in the range of 1/1 to 1/50, more preferably in the range of 1/1. 1.2-1 /
Most preferably, it is used in the range of 20. On the other hand, if the ratio of spectral sensitizing dye / borate compound is less than 1/1,
Sufficient polymerization reactivity and decolorability could not be obtained.
If it exceeds 0, the coating suitability is undesirably deteriorated.

-Other Components- The photopolymerizable photosensitive resin layer may contain other components in addition to the monomer compound and the photopolymerization initiator. Other components include a reducing agent such as an oxygen scavenger (oxyge) as an auxiliary for accelerating the polymerization.
n scavenger) and a chain transfer agent of an active hydrogen donor, and other compounds that promote polymerization by chain transfer (polymerization accelerator). As the oxygen scavenger, phosphine, phosphonate, phosphite, stannous salt, and other compounds easily oxidized by oxygen are preferable. Among them, N-phenylglycine, trimethylbarbituric acid, N, N- Dimethyl-
2,6-diisopropylaniline, N, N, N, -2,
4,6-pentamethylaniline and the like are more preferred. Further, as the polymerization accelerator, thiols, thioketones, trihalomethyl compounds, lofin dimer compounds,
Preferred are iodonium salts, sulfonium salts, azinium salts, organic peroxides and the like.

Further, other components include a thermal polymerization inhibitor. Examples of the thermal polymerization inhibitor include, for example, p
-Methoxyphenol, hydroquinone, alkyl or aryl substituted hydroquinone, t-butyl catechol,
Suitable examples include pyrogallol, naphthylamine, β-naphthol, phenathiazine, pyridine, nitrobenzene, o-toluquinone, aryl phosphite, and the like, but are not limited thereto.

<Organic High Polymer Layer (Coloring Material Layer)> In the case where a coloring material (coloring substance) is used in the photosensitive transfer sheet, the coloring material is contained in the photopolymerizable photosensitive resin layer. Or an organic polymer layer (color material layer) is provided separately,
An embodiment in which a coloring material is contained in the coloring material layer is preferable. The organic high-molecular polymer layer (color material layer) can be provided on either the upper part or the lower part of the photopolymerizable photosensitive resin layer. From the viewpoint of the lower part of the photopolymerizable photosensitive resin layer, that is, between the release layer and the photopolymerizable photosensitive resin layer,
It is more preferable to provide an organic polymer layer (color material layer). As the color material, it is preferable to use known pigments and dyes. However, as a color proof for printing, an organic pigment (yellow, magenta, cyan, black) having a hue equivalent to that of the color ink is used. Is more preferred. Therefore, an organic high-molecular polymer layer containing an organic pigment (color material layer) is provided between the release layer and the photopolymerizable photosensitive resin layer.
And an embodiment in which an organic pigment is contained in the photopolymerizable photosensitive resin layer. The details of the organic pigment and the organic polymer layer (color material layer) are disclosed in, for example, JP-A-59-97140.

<Protective Layer> It is preferable to provide a protective layer on the photopolymerizable photosensitive resin layer. The protective layer is, for example, polyvinyl alcohol, polyvinyl acetate, methyl vinyl ether / maleic anhydride copolymer,
It can be formed by applying and drying a solution of a polymer substance such as polyvinylpyrrolidone, gelatin, and gum arabic.

[0154]

Next, examples and comparative examples of the present invention will be described.
However, the following examples do not limit the present invention. Example 1 A polyethylene terephthalate film (thickness: 100 μm) was used as a support, and a coating liquid for a release layer having the following composition was applied thereon to form a release layer having a dry film thickness of 0.5 μm.

[Coating Solution for Release Layer] Alcohol-soluble polyamide 5.4 g (CM-8000, viscosity: 23 cps, manufactured by Toray Industries, Inc.) Polyhydroxystyrene 3.6 g (Marcalinker M, average molecular weight: 5000, Maruzen Oil Co., Ltd.) 400 g of methanol 100 g of propylene glycol monomethyl ether

Next, four-color photosensitive coating liquids of yellow (Y), magenta (M), cyan (C), and black (K) having the following compositions were used as coating liquids for forming a photopolymerizable photosensitive resin layer. Was prepared respectively.

[Coating solution for photopolymerizable photosensitive resin layer] <Yellow photosensitive coating solution> Benzyl methacrylate / methacrylic acid copolymer 60 g (molar ratio: 73/27, viscosity η: 0.12) pentaerythritol tetraacrylate 43.2 g Exemplified compound 30 of compounds represented by general formulas (1) to (4) 30 0.432 g Organoboron compound (Exemplified compound b-10) 2.592 g Seika First Yellow H-7055 9.4 g (Dainichi Seika Industrial Co., Ltd.) Propylene glycol monomethyl ether acetate 560 g Methyl ethyl ketone 280 g Fluorinated surfactant 1 g

<Magenta Photosensitive Coating Solution> Benzyl methacrylate / methacrylic acid copolymer 60 g (molar ratio: 73/27, viscosity η: 0.12) pentaerythritol tetraacrylate 43.2 g Formulas (1) to (4) Exemplified compound 30 represented by the compound 30 0.432 g Organoboron compound (Exemplified compound b-10) 2.592 g Seika Fast Carmine 1483 5.2 g (manufactured by Dainichi Seika Kogyo Co., Ltd.) Propylene glycol monomethyl ether acetate 560 g Methyl ethyl ketone 280 g Fluorine-based Surfactant 1g (Florade FC-430, manufactured by Sumitomo 3M Limited)

<Cyan photosensitive coating solution> Benzyl methacrylate / methacrylic acid copolymer 60 g (molar ratio: 73/27, viscosity η: 0.12) pentaerythritol tetraacrylate 43.2 g Formulas (1) to (4) Exemplified compound 30 of the represented compound 30 0.432 g Organic boron compound (Exemplified compound b-10) 2.592 g Cyanine blue 4920 5.6 g (manufactured by Dainichi Seika Kogyo Co., Ltd.) Propylene glycol monomethyl ether acetate 560 g Methyl ethyl ketone 280 g Fluorine-based interface Activator 1g (Florade FC-430, manufactured by Sumitomo 3M Limited)

<Black photosensitive coating solution> Benzyl methacrylate / methacrylic acid copolymer 60 g (molar ratio: 73/27, viscosity η: 0.12) pentaerythritol tetraacrylate 43.2 g Formulas (1) to (4) Exemplified compound 30 of the represented compound 30 0.432 g Organic boron compound (Exemplified compound b-10) 2.592 g Mitsubishi carbon black MA-100 6.6 g Propylene glycol monomethyl ether acetate 560 g Methyl ethyl ketone 280 g Fluorosurfactant 1 g (Fluorard FC -430, manufactured by Sumitomo 3M Limited)

Each of the four color photosensitive coating solutions was coated on four substrates provided with a release layer and dried to form a photopolymerizable photosensitive resin layer having a dry film thickness of 2.4 μm. . Separately, a coating solution for forming a protective layer having the following composition was prepared, and this coating solution was applied onto the photopolymerizable photosensitive resin layers of each color and dried to form a protective layer having a dry film thickness of 1.5 μm. Provided.

[Coating Liquid for Protective Layer] Polyvinyl alcohol 60 g (GL-05, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) Water 970 g Methanol 30 g

In this manner, a four-color photosensitive transfer sheet (negative-type colored photosensitive sheet) comprising a support, a release layer, a dye-containing organic polymer resin layer, a photopolymerizable photosensitive resin layer, and a protective layer in this order. Manufactured.

Using the resulting photosensitive transfer sheet, an image was formed as follows. The photosensitive transfer sheet of each of the four colors was subjected to a standard launch wavelength of 405 nm and a minimum wavelength of 395 n using a Nichia NLHV500A semiconductor laser.
m, a maximum wavelength of 415 nm, and an exposure device incorporating a light output of 10 mW, the temperature of the film surface (exposed surface of the photosensitive transfer sheet) is maintained at 30 ° C., and after exposure, a color art developer CA-1 (trade name) : Fuji Photo Film Co., Ltd.)
Automatic development at 31 ° C. for 22 seconds using a 5-fold dilution of (Color Art Processor CA-600PIII (trade name:
Fuji Photo Film Co., Ltd.). In this way, photosensitive transfer sheets of four colors for each of which faithfully reproduced the original image information were obtained. Separately, a coating solution having the following formulation was prepared on a biaxially stretched polyethylene terephthalate film having a thickness of 100 μm, and applied to form a dry film thickness of 20 μm to prepare an image receiving sheet.

[Coating Solution for Image-Receiving Layer] Methyl methacrylate polymer 90 g (average molecular weight: 100,000, manufactured by Wako Pure Chemical Industries, Ltd.) Pentaerythritol tetraacrylate 90 g 2,2,2-dimethoxy-2-phenylacetophenone 3.18 g P- Methoxyphenol 0.09 g Methyl ethyl ketone 220 g

Next, the image side of the black photosensitive transfer sheet as the first color was overlaid so as to be in contact with the film surface of the image receiving sheet material, and the color art transfer machine CA-600TIII (manufactured by Fuji Photo Film Co., Ltd.) was used. Lamination was performed, and then the support of the photosensitive transfer sheet was peeled off, and a black image was transferred onto the image receiving sheet. Next, the remaining three-color photosensitive transfer sheets were sequentially transferred while adjusting the positions, to obtain an image receiving sheet on which four-color halftone images were transferred and formed.

Next, the image receiving sheet to which the four-color image has been transferred and the art paper (final support) are overlaid and laminated by the above-described transfer machine, and then a P-607FW light room printer (manufactured by Dainippon Screen Mfg. Co., Ltd.) (Using a 1 kW ultra-high pressure mercury lamp) from the image receiving sheet side for 120 seconds, and then the support of the image receiving sheet was removed to obtain a final image (color proof) on art paper.

<Evaluation> The obtained image was evaluated by visual observation, and was found to be excellent in color reproducibility, fog, printed matter approximation, and halftone dot reproducibility. Further, when the sensitivity was evaluated, it was possible to obtain twice the sensitivity as compared with the case where the temperature at the time of exposure described later is low (Comparative Examples 1 and 2). The evaluation of the sensitivity was performed as described below.

-Sensitivity test- The photosensitive transfer sheet after the exposure and development to obtain an image has a smaller exposure amount in an area corresponding to a higher step number of step wedges. The conductive resin layer is eluted in the developing solution, and the release layer surface appears. Therefore, in the photosensitive transfer sheet, an area where the photopolymerizable photosensitive resin layer is completely eluted is examined, and the number of steps of the step wedge (the number of solid steps) corresponding to the area where the amount of exposure is the least.
Was evaluated. The higher the number of steps, the higher the sensitivity of the photosensitive transfer sheet.

[Comparative Example 1] In forming an image, an image was obtained and evaluated in the same manner as in Example 1 except that the temperature at the time of exposure of the photosensitive transfer sheet was set at 20 ° C. 1/2 of the case where the temperature is high (Example 1)
Only twice the sensitivity could be obtained.

[Comparative Example 2] In image formation, an image was obtained and evaluated in the same manner as in Example 1 except that the temperature at the time of exposure of the photosensitive transfer sheet was set at 25 ° C. 1/2 of the case where the temperature is high (Example 1)
Only twice the sensitivity could be obtained.

From the examples and comparative examples, the image forming method of the present invention uses a photosensitive transfer sheet having a photopolymerizable photosensitive resin layer containing a specific polymerization initiator, and sets the temperature at the time of exposure to 30 or more. It can be seen that the sensitivity can be increased by performing the above. Further, by using a photosensitive transfer sheet having a photopolymerizable photosensitive resin layer containing a specific polymerization initiator, 350 n
High sensitivity to wavelengths from m to 450 nm, 500 n
It can also be seen that the image forming method is not affected by light having a wavelength near m. Further, the image forming method of the present invention has higher sensitivity suitable for scanning exposure with a short-wavelength semiconductor laser such as InGaN, and has excellent color reproducibility, fogging, printed matter approximation, and halftone dot reproducibility. It can be seen that this is an image forming method. Further, since the photosensitive transfer sheet in the image forming method of the present invention has a photopolymerizable photosensitive resin layer containing a specific polymerization initiator, fog under a yellow light,
This was a photosensitive transfer sheet for scanning exposure, in which handling workability, storage stability and the like were significantly improved.

[0173]

As described above, according to the present invention, there is provided an image forming method which achieves high sensitivity by using a photosensitive transfer sheet used for a photosensitive layer such as a photosensitive transfer sheet for scanning exposure adapted to a DDCP system. can do. Further, according to the present invention, an image is formed on a photosensitive transfer sheet by exposing and developing, and once an image of each color is transferred with a release layer onto a sheet provided with a photopolymerizable image receiving layer. Then, when re-transferred to a permanent support, and further performed an operation of solidifying the photopolymerizable image-receiving layer by overall exposure, a photosensitive transfer sheet that does not cause yellowing in the non-image area where the image has been transferred is used. Thus, an image forming method with high sensitivity can be provided.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinji Fujimoto 200 Onakazato, Fujinomiya City, Shizuoka Prefecture F-Film Co., Ltd. F-term (reference) 2H025 AA01 AA04 AB09 AC08 AD01 AD03 BC13 BC42 BH02 CA39 CA41 CC11 CC13 DA31 DA33 FA03 FA10 FA24 FA30 2H097 BA02 CA17 LA20

Claims (8)

[Claims] 1. Exfoliation of an organic polymer on a support
Layer and photopolymerizable photosensitive resin layer containing photopolymerization initiator
Using a photosensitive transfer sheet having in this order
In an image forming method for forming an image by forming an image, a photopolymerizable photosensitive resin layer in the photosensitive transfer sheet
And represented by the following general formula (1) as a photopolymerization initiator.
Compound and organic boron compound represented by the following general formula (A)
When exposed, at least a photopolymerizable
The temperature of the optical resin layer is set to 30 ° C. or more.
Image forming method. Embedded imageIn the general formula (1), Q₁~ Q_ThreeAre independent
Represents an oxygen atom or a sulfur atom. R₁And R_TwoAre each
Independently, a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic ring
Represents a group. Z₁And Z_TwoIs each independently the general formula
Substitution necessary for the compound represented by (1) to become a dye
Represents a group. Embedded imageIn the general formula (A), Ra¹, Ra^Two, And Ra^Three
Is each independently an aliphatic group, an aromatic group, a heterocyclic group, or
Is -SiRa^FiveRa⁶Ra⁷Represents Ra^Five, Ra ⁶And R
a⁷Each independently represents an aliphatic group or an aromatic group.
Ra^FourRepresents an aliphatic group. Y⁺Can form cations
Represents a group. 2. Exposure and development using a photosensitive transfer sheet having, in this order, a release layer made of an organic polymer and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator on a support. In an image forming method for forming an image, a compound represented by the following general formula (2) as a photopolymerization initiator and a compound represented by the following general formula (2) are added to a photopolymerizable photosensitive resin layer in the photosensitive transfer sheet. An image forming method, comprising a compound capable of generating a radical by interacting with a compound to be prepared, wherein the temperature during exposure of the photosensitive transfer sheet is set to 30 ° C. or higher. Embedded image In the general formula (2), R ₃ and R ₄ each independently represent a hydrogen atom or a monovalent substituent. Z ₃ and Z ₄ are
Each independently represents a substituent necessary for the compound represented by the general formula (2) to become a dye. 3. Exposure and development using a photosensitive transfer sheet having, in this order, a release layer made of an organic polymer and a photopolymerizable photosensitive resin layer containing a photopolymerization initiator on a support. In the image forming method for forming an image, a compound represented by the following general formula (3) as a photopolymerization initiator and a compound represented by the following general formula (3) are added to the photopolymerizable photosensitive resin layer in the photosensitive transfer sheet. An image forming method, comprising a compound capable of generating a radical by interacting with a compound to be prepared, wherein the temperature during exposure of the photosensitive transfer sheet is set to 30 ° C. or higher. Embedded image In the general formula (3), L ₁ and L ₂ each independently represent a methine group which may be substituted. m is 0-3
Represents an integer. G ₁ and G ₂ each independently represent an electron-withdrawing group or combine with G ₁ and G ₂ to form an aromatic ring or a heterocyclic ring. Q ₃ represents an oxygen atom or a sulfur atom. R ₁ and R ₂ each independently represent a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group. 4. A compound represented by the general formula (2):
The image forming method according to claim 2, wherein the compound is a compound represented by the following general formula (4). Embedded image In the formula (4), L ₁ and L ₂ each independently represent a methine group which may be substituted. m is 0-3
G ₁ and G ₂ each independently represent an electron-withdrawing group, or form an aromatic ring or a heterocyclic ring by bonding with G ₁ and G ₂ . R ₃ and R ₄ each independently represent a hydrogen atom or a monovalent substituent. 5. The compound capable of generating a radical is as follows:
An organic boron compound represented by the general formula (A)
The image form according to any one of claims 2 to 4, characterized in that:
Method. Embedded imageIn the general formula (A), Ra¹, Ra^Two, And Ra^Three
Is each independently an aliphatic group, an aromatic group, a heterocyclic group, or
Is -SiRa^FiveRa⁶Ra⁷Represents Ra^Five, Ra ⁶And R
a⁷Each independently represents an aliphatic group or an aromatic group.
Ra^FourRepresents an aliphatic group. Y⁺Can form cations
Represents a group. 6. The method according to claim 1, wherein an organic high molecular polymer layer containing a coloring material is provided between the release layer and the photopolymerizable photosensitive resin layer. 2. The image forming method according to 1., 7. The image forming method according to claim 1, wherein the photopolymerizable photosensitive resin layer contains a coloring material. 8. The image forming method according to claim 1, wherein the exposure is performed at an oscillation wavelength of 350 nm to 450 nm.