JPH03293654A - Sheetlike optical recording material - Google Patents

Abstract

PURPOSE:To allow direct recording of images by irradiation with a laser beam by forming a photocation reaction initiator of an iron/allene compd. CONSTITUTION:This recording material has a layer which is coated with a coating material contg. the photocation reaction initiator, chemical sensitizer and chromophoric dyestuff and is formed on at least one surface of a sheetlike base body. The photocation reaction initiator is formed of the iron/allene compd. The chemical sensitizer, therefore, attains an excited singlet state by absorbing light of a prescribed wavelength. The chemical stabilizer attaining this excited singlet state transfers to an excited triplet state and further the energy migrates to the iron/allene compd. which is the photocation reaction initiator. The photocation reaction initiator is then decomposed and an acid is generated. The chromophoric dyestuff develops color by contact with this acid. Images are directly obtd. without making development and fixing processing in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet-like optical recording material. More specifically, the present invention relates to a sheet-like optical recording material useful as an optical recording material that is irradiated with a laser beam.

[Prior art and problems to be solved by the invention] In recent years, optical information processing technology that applies optical fiber and laser technology has been developed. In this optical information processing technology, optical recording media as data output media are used to form and fix images using electrophotographic methods, such as printers that use laser beams. , toner transfer and fixing processes are required. As a result, the mechanism of the printer becomes complicated, the main body becomes large, and the power consumption increases. Therefore, a large amount of cost and effort is required to maintain and manage the printer.

Therefore, there has been a demand for the development of an optical recording material that does not require toner transfer and fixing processes and can record images directly by laser beam irradiation.

[Means to solve the problem]

The sheet-like optical recording material according to the present invention includes a photocationic reaction initiator, a chemical sensitizer, and a coloring dye (hereinafter referred to as a coloring composition) formed on at least one surface of a sheet-like substrate.
It is characterized in that it has a paint coating layer containing as a main component, and the photocationic reaction initiator is an iron-arene compound.

Further, in the sheet-like optical recording material of the present invention, the paint coating layer may contain a mixture of the coloring composition and a pigment. A sheet-like optical recording material having such a paint coating layer can produce a good recorded image when irradiated with a laser beam.

Next, the effects of each component in the present invention will be explained.

First, the chemical sensitizer absorbs light of a predetermined wavelength and becomes an excited-multiplet state, and the chemical sensitizer in the excited-multiplet state transitions to an excited triplet state, and further initiates a photocation reaction. Energy is transferred to the iron-arene compound, which is the agent, and the photocationic reaction initiator is decomposed to generate acid. Next, the coloring dye develops color upon contact with this acid, and it is understood that an image can be obtained directly without any development or fixing treatment.

Usable photocationic reaction initiators include aromatic diazonium salts, triphenylsulfonium salts, halogenated diphenyl salts, sulfonic acid esters, organic halogen compounds, photosensitive dyes, and iron-arene compounds. Good images can be obtained by using iron-arene compounds.

The iron-arene compound used in the present invention is a compound in which divalent iron ions form a complex with cyclopentadiene and a benzene ring. More specifically, the iron-arene compounds used in the present invention are described by K. Meler et al. in J. Im.
ag, Sci., Vol. 30, 174 (1986), and examples of the iron coordinating bond with the cyclopentadienyl group and the benzene ring further coordinating bonding include benzene (I) and naphthalene ( ■), anthracene (III
), pyrene (IV) and perylene (V).

In addition, the paired anion is fluoroborate (BF
4-), fluorophosphate (PF, -), fluoroantimonate (SbF, -), trifle) (
CF, SO, -) and fluorobortonate (^sF
, -) etc. can be used. In order to facilitate coordination between the benzene ring and iron, the benzene ring contains an alkyl group such as a methyl group or an ethyl group, an alkoxy group such as a methoxy group or an ethoxy group, a halogen group such as chlorine or bromine, or a carbonyl structure. Ketone groups, ester groups, carboxyl groups, etc. can be added.

Chemical sensitizers that can be used in the present invention include anthracene, perylene, phenothiazine, xanthone, thioxanthone, acetophenone, benzophenone, triphenylene, anthraquinone, 4-7enylbenzophenone, Michler's ketone, thiomichler's ketone, naphthalene, 2-acetonaphthalene, 1-acetonaphthalene, trichloromethane, biacetyl, benzyl, camphoraquinone, pyrene, 9.10-dichloroanthracene, perylene, phenol, anthrone, benzaldehyde, phenanthrene, 2-nitrofluorene, 2.4.6 -) Riphenylpyrylium boron tetrafluoride salt, N-methyl-2-benzoyl-β-naphthothiazoline, p-nitroaniline, benzoquinone, 1-ditropyrene, 1,8-dinitropyrene, cyanoacridine, durene, benzo Nitrile, butyrophenone, propiophenone, 5-nitroacenaphthene, acenastene, 2-naphthonitrile, 1-iodonaphthalene, 4-methoxyacetophenone, 4.4'-
Dimethoxybenzophenone, fluorene, triphenylene, biphenyl, 4,4'-bis(diethylamino)benzophenone, 4-7enylacetophenone, 2-iodonaphthalene, 1-naphthonitrile, coronene, fluoranthene, 1,2-benzoanthracene, acridine ,
Examples include tetracene, N-acetyl-4-=)rho-1-naphthylamine, and 2-nitrofluorene. These chemical sensitizers can be selectively used depending on the wavelength and intensity of the laser light source.

In addition, coloring dyes that can be used in the present invention include triphenylmethane dyes, triphenylmethane phthalide dyes, phenothiazine dyes, phenoxazine dyes, fluoran dyes, indolyl phthalide dyes, and azaphthalide dyes. , diphenylmethane dyes, clomepyrazole dyes, leucoauramine dyes, rhodamine lactam dyes, azomethine dyes, and leucoxanthin dyes, as well as triphenylmethane phthalide dyes, indolyl phthalide dyes, and azaphthalide dyes. Particularly preferred are dyes, fluoran dyes, rhodamine lactam dyes and leucoxanthin dyes.

In the sheet-like optical recording material of the present invention, the paint coating layer is composed of the coloring composition and an adhesive that binds the coloring composition. Examples of adhesives include water-soluble adhesives such as polyvinyl alcohol, polyvinylpyrrolidone, carboxymethylcellulose oxidized starch, and casein, as well as styrene-butadiene copolymers, acrylic copolymers, ethylene-vinyl acetate copolymers, and the like. A synthetic polymer adhesive or the like can be used.

In order to improve the printability and writability of the sheet-like optical recording material of the present invention, it is preferable to include a pigment together with the coloring composition in the paint coating layer. Such pigments include pigments used in ordinary pigment-coated papers such as clay, calcium carbonate, aluminum hydroxide, silica, satin white, titanium dioxide, talc, barium sulfate, calcium sulfate, calcium sulfite, etc. These may be used alone or in combination of two or more.

The coloring composition is formulated such that the chemical sensitizer is o, oooi to 10 mol, preferably 0.001 to 1 mol, and the coloring dye is 0.1 to 10 mol, per 1 mol of the photocationic reaction initiator. Preferably it is 0.5 to 5 mol.

The amount of adhesive in the paint coating layer is 50 to 2,000 parts by weight, preferably 100 to 1,000 parts by weight, per mol of the photocationic reaction initiator.

In order to impart printability and writability, when a pigment is blended, the amount of pigment is 10 to 1000 parts by weight, preferably 50 to 3 parts by weight, per 100 parts by weight of the composition.
00 parts by weight.

The sheet-like substrate used in the optical recording material of the present invention includes 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 stack of these.

In the sheet-like optical recording material of the present invention, the paint coating layer contains a reaction accelerator, a reaction regulator,
It may contain a wetting agent, a film forming aid, a diluting solvent, etc.

To form a paint coating layer containing a coloring composition on a sheet-like substrate, a coating liquid having a predetermined composition is applied according to a conventional method.
It may be applied onto a sheet-like substrate using a roll coater or the like, and then dried and cured. Drying and curing may also be carried out using an ultraviolet curing device or an electron beam curing device, as long as the quality of the paint coating layer to be formed is not impaired.

Laser light sources according to the present invention include argon laser, helium-cadmium laser krypton laser,
A helium-neon laser, a semiconductor laser, etc. can be used.

The sheet-like optical recording material according to the present invention can record an image by irradiating it with a laser beam from a laser printer. Furthermore, the sheet-like optical recording material according to the present invention allows clear printing or printed images with a writing instrument to be obtained.

〔Example〕

The present invention will be further explained below with reference to Examples.

Example 1 Iron-arene compound [η6-cumene] [η5-cyclopentagenyl] iron(II)-fluorophosphate (formula ■: trade name “
For 1 mole of Ingacure 261 (manufactured by Ciba Geigy), 0.1 mole of pyrene as a chemical sensitizer and 1 mole of crystal violet lactone, a triphenylmethane phthalide pigment, as a coloring pigment were dispersed and dissolved in methyl ethyl ketone. LR-347 (manufactured by Mitsubishi Rayon Co., Ltd.), an acrylic copolymer, was added as an adhesive.
A coating liquid was prepared by adding 200 parts by weight of the following to 1 mole of photocationic reaction initiator. On the other hand, polyolefin synthetic paper (WL size 110μ, product name "YUBO F") was used as a sheet-like substrate.
PG-110J (manufactured by Tamago Yuka Synthetic Paper Co., Ltd.), and the coating amount was 5 g/m2 (solid content) using a roll coater with the above coating liquid.
It was applied and dried at 100°C for 2 minutes.

When the surface of the paint coating layer of the sheet-like optical recording material thus obtained was irradiated with a laser beam from an argon laser according to a predetermined image pattern, a good blue recorded image was obtained.

(VI) Example 2 Chemical 0.05 mol of pentuphenone was used as a sensitizer, and Red-3 (fluoran dye) was used as a coloring dye.
Sansui Kasei Co., Ltd.) 1 mol was dispersed in methyl ethyl ketone,
The mixture is blended while being dissolved, and 100 parts by weight of this blend is further mixed and dispersed with 100 parts by weight of clay.

Similarly, 500 parts by weight of an acrylic copolymer adhesive (trade name: Cohonyl 4025J, manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.) is added to prepare a coating solution.

On the other hand, a PET film (thickness 50μ
) and apply the above coating solution with a roll coater until the coating amount is 5.
g/m” (solid content), and coated at 100℃ for 2
Dry for a minute.

When the surface of the paint coating layer of the sheet-like optical recording material thus obtained was irradiated with a laser beam from a semiconductor laser light source (oscillation wavelength: 670 r+m) according to a predetermined image pattern, a good red recorded image was obtained. It was also possible to print using normal offset printing or office writing instruments.

(■) Comparative Example 1 Instead of the iron-arene compound used in Example 1, an aromatic diazonium salt, 4-N,N-dimethyliminobenzene-diazonium fluorophosphate (formula ■
: (trade name: rDH-200PFsJ manufactured by Daito Kagaku Kogyo Co., Ltd.) and was coated and evaluated in the same manner as in Example 1, but only a vague image was obtained.

(■) Comparative Example 2 The aromatic sulfonium salt triphenylsulfonium fluorophosphate (formula ■) was used instead of the iron-arene compound used in Example 2, and coating and evaluation were carried out in the same manner as in Example 2. However, no images were obtained.

(IX) [Effects of the Invention] The sheet-like optical recording material of the present invention can directly obtain a good recorded image by irradiating it with a laser beam from a laser light source, and does not require development or fixing operations. .

Claims (1)

[Claims] 1. In a sheet-like optical recording material in which a paint coating layer containing a photo-cation reaction initiator, a chemical sensitizer and a coloring dye as main components is provided on at least one surface of a sheet-like substrate, the photo-cation reaction initiator is iron-arene. A sheet-like optical recording material characterized by being a compound.