JPH0743901A - Photocurable composition and sheet-like optical recording material using the same - Google Patents

Abstract

(57) [Summary] (Modified) [Object] To provide a photocurable composition which is rapidly cured by irradiation with a visible laser beam, and a sheet-like optical recording material which forms a good image thereby. In a photocurable composition containing a cationically polymerizable compound and a photocationic polymerization initiator, as the photocationic polymerization initiator, general formulas (I) and (II): (However, R ¹ and R ⁷ are a benzyl group substituted by one or more members selected from an alkyl group, a benzyl group, and the like, and are R ² , R ³ , R ⁴ , R ⁸ , R ⁹ , and R ^10. Is a hydrogen atom, an alkyl group, etc., and R ⁵ , R ⁶ , R ¹¹ , R
¹² is a hydrogen atom, an alkyl group, or an aryl group, and X ⁻ is SbF ₆ ⁻ , AsF ₆ ⁻ , PF ₆ ⁻ , BF ₄
^-, or C10 ₄ ^- with a a) amino styryl Lucino Li salt compound of, and in the sheet-shaped optical recording material, a paint coating layer formed by the composition.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a photocurable composition and a sheet-like optical recording material using the same. More specifically, the present invention relates to a photocurable composition that quickly becomes a cured product upon irradiation with visible laser light, and a sheet-shaped optical recording material using the same. The photocurable composition according to the present invention is suitable as a recording material such as a hologram recording material, a photoresist and a printing plate, as well as a material for protection, decoration and insulating coating, printing ink, a sealant, an adhesive and the like. It is a thing. The sheet-shaped optical recording material of the present invention can form a photocurable resin image by irradiation with visible laser light.

[0002]

2. Description of the Related Art The advantages of photocationic polymerization are that it does not suffer from polymerization inhibition by oxygen in the air, there are many types of monomers that can be used, and the physical properties of the resulting polymer are excellent. Due to such advantages, the polymerization method is widely used in the industry. As an initiator of such a photocationic polymerization, an aromatic diazonium salt (US Pat. No. 3,703,296 etc.), an aromatic sulfonium salt (JP-B No. 52-14278 etc.), an aromatic iodonium salt (JP-B No. 52- 14277, etc.),
And a benzylpyridinium salt (JP-A-2-43202).
Japanese Patent Laid-Open No. 4-327574, etc.) are known.

However, most of these known photo-cationic polymerization initiator compounds are active only to ultraviolet light, but inactive to visible light, so that their application range is limited. There is a problem. For example,
As a photocationic polymerization initiator compound for an optical recording system using a laser, such as a direct plate making system, it must have activity against visible lasers such as an argon laser, a helium-neon laser, and a semiconductor laser. Therefore, it is not possible to use the initiator compound that is inactive against visible light in a system using a visible laser.

As a method for solving this problem, a spectral sensitization method by adding a sensitizing dye is widely known. As the sensitizing dye, a 3-ketocoumarin compound, a thiapyrylium salt, a naphthothiazole merocyanine compound, a merocyanine compound or the like is used. However, these sensitizing methods undergo a process of energy transfer or electron transfer from the molecule of the sensitizing dye compound to the molecule of the initiator compound, so that the factors affecting the magnitude of the interaction between the sensitizing dye and the initiator. (Compatibility etc.) has a drawback that its activity is influenced.

The present inventors have found that Polymer Preprints, Japa
n, 41, 232 (1992), and Polymer Preprints, Japan,
40, 193 (1991), and a photocationic polymerization initiator having activity against ultraviolet light was examined. The photocationic polymerization initiator described in the above-mentioned document has the general formula (II
I):

[Chemical 3] (However, in the formula (III), R ¹³ represents a benzyl group, an alkyl group, or the like, and R ¹⁴ represents a hydrogen atom, a benzoyl group, or the like). The compound does not have absorption in the visible light region. Therefore, the compound of the formula (III) needs to be modified so that it exhibits activity to visible light.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above problems of the prior art, and a photocurable composition which can be rapidly cured by irradiation with visible laser light, and a sheet-like optical recording material using the same. Is to provide. Further, the present invention is suitable for materials such as protective, decorative and insulating coatings, printing inks, sealants, adhesives, hologram recording materials, photoresists, printing plates and the like, and a photocurable composition which does not require a sensitizing dye. It is intended to provide a sheet-like optical recording material using

[0007]

The present inventors have synthesized various compounds containing the chemical structure of the general formula (III) and examined the activity of these compounds with respect to visible light. As a result, when an aminostyrylquinolinium salt compound having a specific chemical structure is used as a photocationic polymerization initiator,
It was discovered that a desired photocurable composition exhibiting activity with respect to visible laser light was obtained, and the present invention was completed.

The photocurable composition of the present invention contains a cationically polymerizable compound and a photocationic polymerization initiator as main components, and the photocationic polymerization initiator has the following general formulas (I) and (II). :

[Chemical 4](However, in the formulas (I) and (II), R¹And R⁷Is
Independently of each other, alkyl group, benzyl group,
Alkyl group, aryl group, aralkyl group, alkyl group
Xy group, acyl group, alkyloxycarbonyl group, ant
Group, oxycarbonyl group, halogen atom, cyano group,
And at least one member selected from nitro groups
Represents a member selected from the benzyl groups², R³，
R^Four, R⁸, R⁹And R^TenAre independent of each other
, Hydrogen atom, alkyl group, alkyloxy group, acyl
Group, alkyloxycarbonyl group, halogen atom, sia
Represents a member selected from a no group and a nitro group, and R^Five，
R⁶, R¹¹And R¹²Are, independently of one another, hydrogen
A member selected from an atom, an alkyl group, and an aryl group
Represents X^-Is SbF₆ ^-, AsF₆ ^-, PF₆ ^-, B
F_Four ^-, And ClO_Four ^-Represents one member selected from. )
At least one aminostyrylquino represented by
It is characterized by containing a rhinium salt compound.
It

The sheet-like optical recording material of the present invention comprises a sheet-like substrate, a coating layer formed on at least one surface of the sheet-like substrate and containing a cationically polymerizable compound and a photocationic polymerization initiator as main components. The photocationic polymerization initiator has the following general formulas (I) and (II):

[Chemical 5](However, in the formulas (I) and (II), R¹And R⁷Is
Independently of each other, alkyl group, benzyl group,
Alkyl group, aryl group, aralkyl group, alkyl group
Xy group, acyl group, alkyloxycarbonyl group, ant
Group, oxycarbonyl group, halogen atom, cyano group,
And at least one member selected from nitro groups
Represents a member selected from the benzyl groups², R³，
R^Four, R⁸, R⁹And R^TenAre independent of each other
, Hydrogen atom, alkyl group, alkyloxy group, acyl
Group, alkyloxycarbonyl group, halogen atom, sia
Represents a member selected from a no group and a nitro group, and R^Five，
R⁶, R¹¹And R¹²Are, independently of one another, hydrogen
A member selected from an atom, an alkyl group, and an aryl group
Represents X^-Is SbF₆ ^-, AsF₆ ^-, PF₆ ^-, B
F_Four ^-, And ClO_Four ^-Represents one member selected from. )
At least one aminostyrylquino represented by
It is characterized by containing a rhinium salt compound.
It

[0010]

When the photocurable composition of the present invention is irradiated with visible laser light, a cationic polymerization initiating species is produced from the aminostyrylquinolinium salt compound of the formula (I) and / or the formula (II). The initiating species can cause the cationically polymerizable compound to initiate polymerization and cure it.
Examples of the aminostyrylquinolinium salt compounds of the general formulas (I) and (II) used in the present invention are as follows.

[0011]

[Chemical 6]

[0012]

[Chemical 7]

[0013]

[Chemical 8]

[0014]

[Chemical 9] These compounds may be used alone or as a mixture of two or more thereof.

The aminostyrylquinolinium salt compounds of the general formulas (I) and (II) can be prepared, for example, by the following reaction formula:

[Chemical 10] Can be synthesized according to the route shown in.

The above reaction formula shows a synthesis example of the compound No. 3, that is, 4- (p-dimethylaminostyryl) -1-benzylquinolinium hexafluoroantimonate. More specifically, Compound No.
3 was prepared by reacting 4- (p-dimethylaminostyryl) quinoline with benzyl bromide in an equimolar amount thereof under reflux conditions of acetonitrile for 2 days, and crystallizing the resulting reaction product in methanol. It is obtained by reacting with potassium antimonate and recrystallizing and purifying the crystal of this reaction product from a mixed solvent of ethanol-acetonitrile. However, the method for synthesizing the photocationic polymerization initiator of the present invention is not limited to this.

Examples of the cationically polymerizable compound used in the photocurable composition of the present invention include propylene oxide, cyclohexene oxide, phenylglycidyl ether and (3,4-epoxycyclohexyl) methyl-.
3,4- (epoxycyclohexyl) carboxylate, bis (3,4-epoxycyclohexyl) adipate, 4-vinylcyclohexene dioxide, 1,13-
Tetradecadiene dioxide, limonene dioxide, bisphenol A type epoxy resin, halogenated bisphenol A type epoxy resin, cresol novolac type epoxy resin, phenol novolac type epoxy resin, polyglycidyl ether of polyhydric alcohol, and other epoxy compounds, n- Butyl vinyl ether, isopropyl vinyl ether, cyclohexyl vinyl ether, isobutyl vinyl ether, hydroxybutyl vinyl ether, allyl vinyl ether, ethynyl vinyl ether, phenyl vinyl ether, p-methoxyphenyl vinyl ether, butanediol divinyl ether, triethylene glycol divinyl ether, cyclohexanediol divinyl ether, 1 , 4-benzenedimethanol divinyl ether, hydroxy Vinyl ethers such as divinyl ether, styrenes such as styrene, α-methylstyrene and p-chloromethylstyrene, cyclic ether compounds such as tetrahydrofuran, s-trioxane and 3,3-bischloromethyloxetane, 1-phenyl-4- Ethyl-2,6,7-trioxabicyclo [2,2,2]
Octane, 1-ethyl-4-hydroxymethyl-2,
Bicyclo orthoester compounds such as 6,7-trioxabicyclo [2,2,2] octane, 1,4,6-trioxaspiro [4,4] nonane, 2-methyl-1,4,6
-Spiro orthoester compounds such as trioxaspiro [4,4] nonane and 1,4,6-trioxaspiro [4,5] decane, 1,5,7,11-tetraoxaspiro [5,5] undecane , 3,9-dibenzyl-1,5
Examples thereof include cyclic carbonate compounds such as 7,11-tetraoxaspiro [5,5] undecane, thiirane compounds such as ethylene sulfide and thioepichlorohydrin, and N-vinylcarbazole derivatives. These may be used alone or in combination of two or more.

The photocurable composition of the present invention may contain a photocationic polymerization initiator different from the compounds of the formulas (I) and (II). They are, for example, Japanese Patent Publication No. 52-142.
77, JP-A-54-53181, JP-B-5
No. 2-14278, Japanese Patent Publication No. 59-19581, Japanese Unexamined Patent Publication No. 3-39747, and Japanese Unexamined Patent Publication No. 2-2562.
Aromatic halonium salts, aromatic sulfonium salts, aromatic selenonium salts, and iron-arene compounds described in JP-A-4-1203 and the like, JP-A-2-43202, and JP-A-4-43202. -327574
It can be selected from the pyridinium salts and the like described in the publications and the like, as well as aromatic diazonium salts, phosphonium salts, sulfonic acid esters, halogenated triazine compounds and the like. These may be used alone or in combination of two or more, but the amount used is preferably 0.01 to 20% based on the weight of the cationically polymerizable compound.

The photocurable composition of the present invention may contain a leuco dye having a lactone ring as an indicator showing that the curing reaction is proceeding. The color of the mixture of the photocationic polymerization initiator of the present invention and the leuco dye having a lactone ring changes upon irradiation with visible laser light. When a leuco dye having a lactone ring is added to the photocurable composition of the present invention, the progress of the curing reaction can be visually confirmed by the color change.

In the present invention, the leuco dye having a lactone ring used for the above purpose is a triphenylmethane-based compound, a fluoran-based compound, a diphenylmethane-based compound or the like, for example, 3- (4-diethylamino-2-ethoxyphenyl). -3- (1-Ethyl-2-methylindol-3-yl) -4-azaphthalide, crystal violet lactone, 3- (N-ethyl-N-isopentylamino) -6-methyl-7-anilinofluorane , 3-diethylamino-6-methyl-7-anilinofluorane,
3-Diethylamino-6-methyl-7- (o, p-dimethylanilino) fluorane, 3- (N-ethyl-N-p
-Toluidino) -6-methyl-7-anilinofluorane, 3-pyrrolidino-6-methyl-7-anilinofluorane, 3-dibutylamino-6-methyl-7-anilinofluorane, 3- (N -Cyclohexyl-N-methylamino) -6-methyl-7-anilinofluorane, 3-diethylamino-7- (o-chloroanilino) fluorane, 3-diethylamino-7- (m-trifluoromethylanilino) fluorane, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-6
-Methylfluorane, 3-cyclohexylamino-6-chlorofluorane, 3- (N-ethyl-N-hexylamino) -6-methyl-7- (p-chloroanilino) fluorane, and the like. These may be used alone or as a mixture of two or more kinds, and the amount used is 0.1% with respect to the weight of the photocationic polymerization initiator.
It is preferably 001 to 20%.

The photocurable composition of the present invention may further contain a radical-polymerizable compound within the range that does not impair the object of the present invention. They are, for example, N-vinyl-2-pyrrolidone, bisphenol A diacrylate, tripropylene glycol diacrylate, polyethylene glycol acrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, trimethylolpropane triacrylate,
It can be selected from oligoester acrylate and the like.
These may be used alone or in combination of two or more.

The photocurable composition of the present invention further contains a radical polymerization initiator such as an aromatic ketone compound, a sulfur compound, an organic peroxide, an azo compound and an organic halogen compound, as long as the object thereof is not impaired. You can leave.

The photocurable composition of the present invention comprises a water-soluble adhesive such as polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, oxidized starch, and casein,
In addition, a synthetic polymer adhesive such as a styrene-butadiene copolymer, an acrylic copolymer, and an ethylene-vinyl acetate copolymer may be further included. The amount used is preferably 1 to 50% based on the weight of the photocurable composition.

The photocurable composition of the present invention may further contain pigments such as clay, calcium carbonate, aluminum hydroxide, silica, titanium dioxide, talc, barium sulfate, calcium sulfate, calcium sulfite, and organic pigments. Good. The amount used is 1 to the weight of the photocurable composition.
It is preferably 20%.

The photocurable composition of the present invention may contain a curing accelerator, a reaction modifier, a wetting agent, a film-forming aid, a diluting solvent, etc., as long as the desired effects are not impaired.

Examples of the sheet-like substrate used in the optical recording material of the present invention include porous substrates such as paper, nonwoven fabric and cloth, synthetic paper, polymer film, metal foil and the like.
These may be used alone or in the form of a laminate of these.

The coating amount of the paint coating layer containing the photocurable composition applied on the sheet substrate is 0.01 to 50 g / m ^2.
(Solid content), more preferably 0.
It is 1 to 20 g / m ² (solid content). The paint coating layer is formed by applying a coating liquid having a predetermined composition onto a sheet-shaped substrate by a roll coater or the like according to a conventional method and drying the coating.

The sheet-shaped optical recording material of the present invention forms an image according to the following principle. When the recording sheet is irradiated with laser light based on image information, only the exposed portion is cured, and a cured resin image insoluble in a solvent, an alkaline solution or the like is formed. The development is performed by eluting the unexposed portion with a solvent, an alkaline solution or the like.

The solvent used for the development treatment varies depending on the kind of the cationic polysynthetic monomer used, the degree of polymerization of the obtained cured product, and the like, but it is methanol, tetrahydrofuran, methyl ethyl ketone, toluene, acetone, methyl isobutyl ketone, ethyl acetate, acetic acid. It can be selected from butyl, acrylonitrile, dimethylformamide and the like.

As a laser light source for the photocurable composition of the present invention, a laser light source having an oscillation wavelength in the visible light region such as an argon laser, a helium / cadmium laser, a krypton laser, a helium / neon laser, a semiconductor laser, and a ruby laser. Can be used. An infrared laser can also be used by wavelength conversion using a nonlinear optical crystal.

[0031]

EXAMPLES The present invention will be specifically described with reference to the following synthesis examples and examples. Synthesis example 1 4- (p-dimethylaminostyryl) -1-benzyl
Norinium hexafluoroantimonate (Compound No.
Synthesis of 3) 4- (p-dimethylaminostyryl) quinoline (trademark:
NK-1837, manufactured by Japan Photosensitive Dye Research Institute) 100 mg,
Benzyl bromide (62 mg) was dissolved in acetonitrile (15 ml) heated to 50 ° C., and the mixture was reacted under reflux for 48 hours. After distilling off acetonitrile from the reaction mixture, the obtained reaction product was dissolved in methanol,
Add 100 mg of potassium hexafluoroantimonate 6
Stir for hours. The precipitate was filtered off to collect crude crystals, which were recrystallized from a mixed solvent of ethanol-acetonitrile for purification. The yield was 184 mg (yield 84%).

Synthesis Example 2 4- (p-dimethylaminostyryl) -1- (p-octyl)
Cylbenzyl) quinolinium hexafluoroantimonet
Synthesis of compound (Compound No. 5) 4- (p-dimethylaminostyryl) quinoline (trademark:
NK-1837, manufactured by Japan Photosensitive Dye Research Institute) 200 mg,
p-octylbenzyl bromide (Production method: p-octylbenzoic acid chloride was reduced with lithium aluminum hydride, and then brominated with phosphorus tribromide to synthesize.)
206 mg and 30 ml of acetonitrile heated to 50 degrees
Was dissolved in the mixture, and the mixture was reacted under reflux for 72 hours. After distilling acetonitrile off from the reaction mixture, the reaction product was dissolved in methanol, 200 mg of potassium hexafluoroantimonate was added thereto, and the mixture was stirred for 6 hours. The precipitate was filtered off to collect crude crystals. This was purified by recrystallization from a mixed solvent of ethanol-acetonitrile. Yield 364mg
(Yield 70%).

Example 1 Cyclohexene Oxide Using the Compound No. 3 as a Polymerization Initiator
Polymerization of Xide Cyclohexene oxide was polymerized using the above compound No. 3 as a cationic photopolymerization initiator. Compound N
The addition amount of o.3 is 0.1 with respect to cyclohexene oxide.
It was defined as mol%. The reaction mixture was placed in a degassed sealed tube at room temperature,
Wavelength 5 using argon laser light source under bulk conditions
A laser beam of 14.5 nm and an output of 100 mW was irradiated for 10 minutes. The conversion rate of cyclohexene oxide into a polymer after laser light irradiation was measured using 1H-NMR.
Further, the presence or absence of curing of the sample was visually evaluated. The results are shown in Table 1.

Example 2 Cyclohexene Oxide Using the Compound No. 5 as a Polymerization Initiator
Polymerization of xide The same operation as in Example 1 was performed. However, instead of Compound No. 3, Compound No. 5 was used. The results are shown in Table 1.

Example 3 Cyclohexene Oxide Using the Compound No. 7 as a Polymerization Initiator
Polymerization of xide The same operation as in Example 1 was performed. However, the compound No. 7 was used instead of the compound No. 3. The results are shown in Table 1.

Example 4 Cyclohexene Oxide Using the Compound No. 8 as a Polymerization Initiator
Polymerization of xide The same operation as in Example 1 was performed. However, the compound No. 8 was used in place of the compound No. 3. The results are shown in Table 1.

Comparative Example 1 1-Benzylquinolinium hexafluoroantimony
Polymerization of Cyclohexene Oxide Using Atomic Acid as a Polymerization Initiator However, instead of the compound No. 3, 1 known as a cationic polymerization initiator for ultraviolet light was used.
-Benzylquinolinium hexafluoroantimonate was used. The results are shown in Table 1.

Comparative Example 2 1-Benzylpyridinium hexafluoroantimony
Polymerization of Cyclohexene Oxide Using Atomic Acid as a Polymerization Initiator The same operation as in Example 1 was performed. However, instead of the compound No. 3, 1 known as a cationic polymerization initiator for ultraviolet light was used.
-Benzylpyridinium hexafluoroantimonate was used. The results are shown in Table 1.

[0039]

[Table 1]

Example 5 Production of a sheet-like optical recording material using the above compound No. 5
Image formation Compound No. 5, 1 part by weight, Rapi-Cure DEV-3 (IS
1000 parts by weight of a vinyl ether derivative manufactured by P. Co., Ltd. and 100 parts by weight of an acrylic copolymer adhesive COPONYL 4025 (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) were dissolved in acetone to prepare a coating solution. Using a roll coater, a dry coating amount of this coating liquid was 5 g / m ² on a polyolefin-based synthetic paper (trademark: YUPO FPG-110, manufactured by Oji Yuka Synthetic Paper Co., Ltd., thickness: 110 μm). Apply to 10
It was dried at 0 ° C. for 2 minutes. The surface of the coating material coating layer of the sheet-shaped optical recording material thus obtained was irradiated with a laser beam from an argon laser light source according to a pattern of a predetermined image, and the unirradiated portion was eluted with acetone. The formation state of the recorded image at this time was visually evaluated. The results are shown in Table 2.

Example 6 Production of sheet-like optical recording material using compound No. 8 and image
The same operation as in formation example 5 was performed. However, the compound No. 8 was used instead of the compound No. 5. The results are shown in Table 2.

Comparative Example 3 1-Benzylquinolinium hexafluoroantimony
Manufacture of a sheet-shaped optical recording material using a sheet and image forming operation were performed in the same manner as in Example 5. However, instead of the compound No. 5, 1
-Benzylquinolinium hexafluoroantimonate was used. The results are shown in Table 2.

[0043]

[Table 2]

As is clear from Table 1, the photocurable composition containing the specific photocationic polymerization initiator of the present invention was polymerized by irradiation with visible laser light to be a cured product. On the other hand, in Comparative Example, the composition using the cationic polymerization initiator for ultraviolet light was not cured at all even when it was irradiated with visible laser light.

As is clear from Table 2, the sheet-shaped optical recording material of the present invention formed a good image by irradiation with visible laser light. On the other hand, in Comparative Example, when the cationic polymerization initiator for ultraviolet light was used, it was not possible to form an image at all even when it was irradiated with visible laser light.

[0046]

Since the photocurable composition of the present invention contains a specific aminostyrylquinolinium salt as a photocationic polymerization initiator, it is rapidly cured by irradiation with visible laser light. Further, the sheet-like optical recording material provided with the coating layer containing the photocurable composition of the present invention has excellent practicality by giving a good recorded image by irradiation with visible laser light.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical indication location G03F 7/038 G11B 7/24 516 7215-5D (72) Inventor Yukio Hosoda 1-10 Shinonome, Koto-ku, Tokyo No. 6 Oji Paper Co., Ltd. Central Research Laboratory

Claims (2)

[Claims] 1. A compound capable of undergoing cationic polymerization, and a photo-catio compound.
And a photoinitiator as a main component.
The polymerization initiator is represented by the following general formulas (I) and (II):(However, in the formulas (I) and (II), R¹And R⁷Is
Independently of each other, alkyl group, benzyl group,
Alkyl group, aryl group, aralkyl group, alkyl group
Xy group, acyl group, alkyloxycarbonyl group, ant
Group, oxycarbonyl group, halogen atom, cyano group,
And at least one member selected from nitro groups
Represents a member selected from the benzyl groups², R³，
R^Four, R⁸, R⁹And R^TenAre independent of each other
, Hydrogen atom, alkyl group, alkyloxy group, acyl
Group, alkyloxycarbonyl group, halogen atom, sia
Represents a member selected from a no group and a nitro group, and R^Five，
R⁶, R¹¹And R¹²Are, independently of one another, hydrogen
A member selected from an atom, an alkyl group, and an aryl group
Represents X^-Is SbF₆ ^-, AsF₆ ^-, PF₆ ^-, B
F_Four ^-, And ClO_Four ^-Represents one member selected from. )
At least one aminostyrylquino represented by
Photocurable, characterized by containing a rhinium salt compound
Composition. 2. A sheet-like substrate and at least one surface thereof
Compound formed on the surface and capable of undergoing cationic polymerization, and light
A coating layer containing a cationic polymerization initiator as a main component
The photocationic polymerization initiator has the following general formula
(I) and (II):(However, in the formulas (I) and (II), R¹And R⁷Is
Independently of each other, alkyl group, benzyl group,
Alkyl group, aryl group, aralkyl group, alkyl group
Xy group, acyl group, alkyloxycarbonyl group, ant
Group, oxycarbonyl group, halogen atom, cyano group,
And at least one member selected from nitro groups
Represents a member selected from the benzyl groups², R³，
R^Four, R⁸, R⁹And R^TenAre independent of each other
, Hydrogen atom, alkyl group, alkyloxy group, acyl
Group, alkyloxycarbonyl group, halogen atom, sia
Represents a member selected from a no group and a nitro group, and R^Five，
R⁶, R¹¹And R¹²Are, independently of one another, hydrogen
A member selected from an atom, an alkyl group, and an aryl group
Represents X^-Is SbF₆ ^-, AsF₆ ^-, PF₆ ^-, B
F_Four ^-, And ClO_Four ^-Represents one member selected from. )
At least one aminostyrylquino represented by
Sheet form characterized by containing a rhinium salt compound
Optical recording material.