JP3073578B2 - Dye for thermal transfer recording, ink composition for thermal transfer recording, and transfer sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dye for thermal transfer recording (hereinafter abbreviated as "sublimation dye"), a thermal transfer recording ink composition, and a transfer sheet used for color hard copy and the like by a sublimation thermal transfer recording system. About.

[0002]

2. Description of the Related Art In a thermal transfer system using a sublimation dye, an ink-sublimation dye is applied to a thin condenser paper having a thickness of several microns or a PET film, and is selectively heated by a thermal head to be transferred to a recording paper. This is one of the thermal transfer printing methods and is currently used as a means for recording (hard copy) various image information.

[0003] The sublimation dyes used here are rich in color, excellent in color mixing, strong in dyeing power, and relatively high in stability. However, the amount of subliming dyes depends on thermal energy. It has a big characteristic that other printing methods do not have in that the density after dyeing can be controlled in an analog manner.

As a cyan sublimation dye, an indoaniline compound which has been receiving particular attention (JP-A-61-2)
No. 2993, JP-A-61-31292), very few of which have both high sublimation speed and image stability after transfer, the appearance of a dye satisfying the optimum conditions as a sublimation dye has been expected.

[0005]

SUMMARY OF THE INVENTION The present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, generally, in a sublimation transfer type dye, the sublimation speed at the time of transfer is determined by the interaction between the dye molecules. It was found that it is related to the interaction between the dye molecules and the binder resin for ink.

That is, it is preferable that the dye has good solubility in the ink solvent and has a low melting point, and that the interaction with the binder resin for the ink is small enough not to impair the storage stability after manufacturing the ribbon. It was found that the dye was an excellent dye. The dye represented by the general formula (I) of the present invention described below has the above-described conditions and has been found to provide a relatively good sublimation rate, and has completed the present invention. The purpose is to solve the above problems, dyes for thermal transfer recording, the same ink composition,
And a transfer sheet.

[0007]

In order to solve the above-mentioned problems, the present invention has the following general formula (I):

[0008]

Embedded image [Wherein, R ¹ and R ² represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, an alkoxy group, a cycloalkyl group, an aryl group, an alkenyl group, or an aralkyl group, and R ³ and R ⁴ represent R ^{5 to} R ⁸ represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, an alkylcarbonylamino group, an alkoxycarbonylamino group, Formylamino group, alkylsulfonylamino group,
Or a halogen atom, and R ^{9 to} R ¹⁰ represent a hydrogen atom, a substituted or unsubstituted alkyl group, an aralkyl group, an alkenyl group, or an aryl group, and n represents an integer of 0 to 8]. Is a dye for thermal transfer recording.

The present invention also provides a thermal transfer recording ink composition comprising at least a thermal transfer recording dye represented by the general formula (I), a binder resin, and an organic solvent and / or water. is there.

The present invention is also a transfer sheet comprising a base sheet and a dye-carrying layer formed on one surface of the base sheet, wherein the dye contained in the dye-carrying layer is the above-described dye.

Hereinafter, the present invention will be described in detail.

The thermal transfer recording dye of the present invention is a compound represented by the general formula (I), wherein R ¹ and R ² are a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, an alkoxy group, It represents a cycloalkyl group, an aryl group, an alkenyl group, or an aralkyl group.

The unsubstituted alkyl group has 1 to 1 carbon atoms.
8 linear or branched alkyl groups such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, i
so-butyl, sec-butyl, tert-butyl, n
-Pentyl, n-hexyl, n-heptyl, n-octyl and the like.

The substituted alkyl group has 1 to 6 carbon atoms.
Hydrogen on a straight-chain or branched alkyl group is an alkoxy group, an alkoxyalkoxy group, an aryloxy group, a thioaryloxy group, an alkylcarbonylamino group, an alkoxycarbonylamino group, a formylamino group, an alkylcarbonyl group, Examples include an alkoxycarbonyl group, an alkylcarboxy group, an alkoxycarboxy group, an alkoxycarbonylalkoxy group, a halogen atom, or a group substituted with a cyano group.

The alkoxy group is preferably one having 1 to 8 carbon atoms, for example, methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-butoxy, sec-butoxy, tert-butoxy, n-butoxy.
Hexyloxy and the like.

The alkoxyalkoxy group preferably has 1 to 8 carbon atoms, for example, methoxymethoxy,
Examples include methoxyethoxy, ethoxyethoxy, methoxypropoxy, ethoxypropoxy, propoxypropoxy and the like.

As the aryloxy group, phenoxy,
Examples include p-methylphenoxy, m-methylphenoxy, o-methylphenoxy, p-chlorophenoxy, m-methylphenoxy, o-methylphenoxy and the like.

As the thioaryloxy group, thiophenoxy, p-methylthiophenoxy, m-methylthiophenoxy, o-methylthiophenoxy and the like are preferable.

The alkylcarbonylamino group preferably has 1 to 6 carbon atoms, and examples thereof include methylcarbonylamino, ethylcarbonylamino, n-propylcarbonylamino, iso-propylcarbonylamino, n-butylcarbonylamino and the like. .

The alkoxycarbonylamino group is preferably an alkoxy group having 1 to 6 carbon atoms, such as methoxycarbonylamino, ethoxycarbonylamino, n-propoxycarbonylamino, iso-propoxycarbonylamino, n-butoxycarbonylamino and the like. There is.

The alkylcarbonyl group is preferably an alkyl group having 1 to 6 carbon atoms, such as methylcarbonyl, ethylcarbonyl, n-propylcarbonyl, is
Examples thereof include o-propylcarbonyl and n-butylcarbonyl.

The alkoxycarbonyl group is preferably an alkoxy group having 1 to 6 carbon atoms, such as methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, iso-propoxycarbonyl and n-butoxycarbonyl.

As the alkylcarboxy group, those having 1 to 6 carbon atoms in the alkyl group are preferred, and methylcarboxy, ethylcarboxy, n-propylcarboxy, is
Examples include o-propyl carboxy and n-butyl carboxy.

The alkoxycarboxy group is preferably an alkoxy group having 1 to 6 carbon atoms, such as methoxycarboxy, ethoxycarboxy, n-propoxycarboxy, iso-propoxycarboxy and n-butoxycarboxy.

The alkoxycarbonylalkoxy group is preferably an alkoxy group having 1 to 4 carbon atoms.
Examples include methoxycarbonylmethoxy, ethoxycarbonylmethoxy, n-propoxycarbonylmethoxy, iso-propoxycarbonylmethoxy, n-butoxycarbonylmethoxy, and the like.

As the halogen atom, fluorine, chlorine, bromine and the like are preferable.

The alkoxy group preferably has 1 to 8 carbon atoms, for example, methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-
Butoxy, sec-butoxy, tert-butoxy, n
-Hexyloxy and the like.

As the cycloalkyl group, cyclopentyl, cyclohexyl and the like are preferable.

Examples of the aryl group include phenyl, p-tolyl, m-tolyl, o-tolyl, p-chlorophenyl, m-tolyl
-Chlorophenyl, o-chlorophenyl and the like are preferred.

The alkenyl group preferably has 2 to 6 carbon atoms, and examples thereof include allyl, 2-butenyl, 3-butenyl and 3-methyl-2-butenyl.

The aralkyl group is preferably an alkyl group having 1 to 4 carbon atoms, such as benzyl and phenethyl.

R ³ and R ^{4 each} represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a halogen atom.

As the alkyl group, methyl, ethyl, n
-Propyl, iso-propyl, n-butyl, iso-
Butyl, sec-butyl, tert-butyl and the like are preferred.

As the halogen atom, fluorine, chlorine, bromine and the like are preferable.

R ^{5 to} R ⁸ represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, an alkylcarbonylamino group, an alkoxycarbonylamino group, a formylamino group, an alkylsulfonylamino group, or a halogen atom.

Here, the alkyl group having 1 to 4 carbon atoms includes methyl, ethyl, n-propyl, iso-propyl,
n-butyl, iso-butyl, sec-butyl, ter
A t-butyl group and the like are preferred.

The alkoxy group is preferably one having 1 to 8 carbon atoms, for example, methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-butoxy, sec-butoxy, tert-butoxy, n-
Hexyloxy and the like.

The alkylcarbonylamino group preferably has 1 to 6 carbon atoms, and examples thereof include methylcarbonylamino, ethylcarbonylamino, n-propylcarbonylamino, iso-propylcarbonylamino, n-butylcarbonylamino and the like. .

As the alkoxycarbonylamino group,
An alkoxy group having 1 to 6 carbon atoms is desirable, and examples thereof include methoxycarbonylamino, ethoxycarbonylamino, n-propoxycarbonylamino, iso-propoxycarbonylamino, and n-butoxycarbonylamino.

The alkylsulfonylamino group is preferably an alkyl group having 1 to 4 carbon atoms, such as methylsulfonylamino, ethylsulfonylamino, n-propylsulfonylamino, iso-propylsulfonylamino, n-butylsulfonylamino and the like. Can be exemplified.

Examples of the halogen atom include fluorine, chlorine and bromine.

R ⁹ and R ¹⁰ represent a hydrogen atom, a substituted or unsubstituted alkyl group, an aralkyl group, an alkenyl group, or an aryl group.

The unsubstituted alkyl group has 1 to 1 carbon atoms.
10 linear or branched alkyl groups such as methyl, ethyl, n-propyl, iso-propyl, n-butyl, i
so-butyl, sec-butyl, tert-butyl, n
-Pentyl, n-hexyl, n-heptyl, n-octyl and the like.

The substituted alkyl group has 1 to 8 carbon atoms.
Hydrogen on a linear or branched alkyl group is an alkoxy group, an alkoxyalkoxy group, an aryloxy group, a thioaryloxy group, an alkylcarbonylamino group, an alkoxycarbonylamino group, a formylamino group, an alkylcarbonyl group, an alkoxy group Examples include a carbonyl group, an alkylcarboxy group, an alkoxycarboxy group, an alkoxycarbonylalkoxy group, a halogen atom, or a group substituted with a cyano group.

As the alkoxy group, those having 1 to 8 carbon atoms are preferred. For example, methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-butoxy, sec-butoxy, tert-butoxy, n-
Hexyloxy and the like.

The alkoxyalkoxy group preferably has 1 to 6 carbon atoms, for example, methoxymethoxy,
Examples include methoxyethoxy, ethoxyethoxy, methoxypropoxy, ethoxypropoxy, propoxypropoxy and the like.

As the aryloxy group, phenoxy,
Examples include p-methylphenoxy, m-methylphenoxy, o-methylphenoxy, p-chlorophenoxy, m-methylphenoxy, o-methylphenoxy and the like.

As the thioaryloxy group, thiophenoxy, p-methylthiophenoxy, m-methylthiophenoxy, o-methylthiophenoxy and the like are preferable.

The alkylcarbonylamino group preferably has 1 to 6 carbon atoms, and examples thereof include methylcarbonylamino, ethylcarbonylamino, n-propylcarbonylamino, iso-propylcarbonylamino, n-butylcarbonylamino and the like. .

The alkoxycarbonylamino group is preferably an alkoxy group having 1 to 6 carbon atoms, such as methoxycarbonylamino, ethoxycarbonylamino, n-propoxycarbonylamino, iso-propoxycarbonylamino, n-butoxycarbonylamino and the like. There is.

The alkylcarbonyl group is preferably an alkyl group having 1 to 6 carbon atoms, such as methylcarbonyl, ethylcarbonyl, n-propylcarbonyl, is
Examples thereof include o-propylcarbonyl and n-butylcarbonyl.

The alkoxycarbonyl group is preferably an alkoxy group having 1 to 6 carbon atoms, such as methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, iso-propoxycarbonyl and n-butoxycarbonyl.

As the alkylcarboxy group, those having 1 to 6 carbon atoms in the alkyl group are preferable, and methylcarboxy, ethylcarboxy, n-propylcarboxy, is
Examples include o-propyl carboxy and n-butyl carboxy.

The alkoxycarboxy group is preferably an alkoxy group having 1 to 6 carbon atoms, and examples thereof include methoxycarboxy, ethoxycarboxy, n-propoxycarboxy, iso-propoxycarboxy and n-butoxycarboxy.

The alkoxycarbonylalkoxy group is preferably an alkoxy group having 1 to 6 carbon atoms.
Examples include methoxycarbonylmethoxy, ethoxycarbonylmethoxy, n-propoxycarbonylmethoxy, iso-propoxycarbonylmethoxy, n-butoxycarbonylmethoxy, and the like.

As the halogen atom, fluorine, chlorine, bromine and the like are preferable.

The aralkyl group is preferably an alkyl group having 1 to 4 carbon atoms, such as benzyl and phenethyl.

The alkenyl group preferably has 2 to 6 carbon atoms, and examples thereof include allyl, 2-butenyl, 3-butenyl and 3-methyl-2-butenyl.

Examples of the aryl group include phenyl, p-tolyl, m-tolyl, o-tolyl, p-chlorophenyl, m-tolyl
-Chlorophenyl, o-chlorophenyl and the like are preferred.

N represents an integer of 0 to 8.

The dye represented by formula (I) of the present invention can be obtained by an oxidative bond between a substituted aniline and a substituted phenol by a conventional method.

[0062]

Embedded image X represents a leaving group such as H or halogen.

As a method for producing a thermal transfer recording ink using the coloring matter of the present invention, the coloring matter may be mixed with an appropriate resin, solvent or the like to obtain the recording ink.

In this case, the amount of the dye in the thermal transfer recording ink is usually 2 to 5% by weight.

As a thermal transfer method, a transfer sheet is prepared by applying the ink obtained above on a suitable base sheet, the transfer sheet is superimposed on a recording medium, and then heat-sensitive recording is performed from the back of the transfer sheet. A method of heating and pressurizing with a head can be used, in which case the dye on the transfer sheet is transferred onto the recording material.

As the resin for preparing the above ink, those used in ordinary printing inks may be used. Rosin, phenol, xylene, petroleum, vinyl, polyamide, alkyd, nitrocellulose Oil-based resins such as alkyl-based resins, and aqueous resins such as maleic acid-based, acrylic acid-based, casein, shellac, and glue.

Solvents for ink preparation include alcohols such as methanol, ethanol, propanol and butanol, cellosolves such as methyl cellosolve and ethyl cellosolve, aromatics such as benzene, toluene and xylene, ethyl acetate, and the like. Esters such as butyl acetate, ketones such as acetone, methyl ethyl ketone and cyclohexanone, hydrocarbons such as ligroin, cyclohexane and kerosene, and dimethylformamide can be used.When using an aqueous resin, water or water and the above are used. Can be used as a mixture.

As the substrate sheet to which the ink is applied, thin paper such as condenser paper and glassine paper, and a plastic film having good heat resistance such as polyester, polyamide and polyimide are suitable. In order to improve the efficiency of heat transfer from the thermal recording head to the dye, a thickness of about 5 to 50 μm is appropriate.

The dye-carrying layer provided on the surface of the base sheet can be prepared by applying the above-mentioned ink to the base sheet.

Examples of the recording material include polyolefin resins such as polyethylene and polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, vinyl polymers such as polyvinyl alcohol, polyvinyl acetate, and polyacrylic ester. Polyester resin such as polyethylene terephthalate, polybutylene terephthalate, polystyrene resin, polyamide resin,
Copolymer resins of olefins such as ethylene and propylene with other vinyl monomers, cellulose resins such as ionomers, cellulose diacetate and cellulose triacetate, fibers, woven fabrics, films, sheets, and moldings made of polycarbonate, polysulfone, polyimide, etc. Objects and the like.

Particularly preferred are woven fabrics, sheets or films made of polyethylene terephthalate.

Further, in the present invention, the resin obtained by adding acidic fine particles such as silica gel to the resin is coated on plain paper, impregnated, or laminated with a resin film, or processed by acetylation. The use of paper enables good recording with excellent image stability under high temperature and high humidity. Also, films of various resins or synthetic papers made therefrom can be used.

Further, after the transfer recording, for example, a polyester film is hot-pressed and laminated on the transfer recording surface, thereby improving the coloring of the dye and stabilizing the storage of the recording.

[0074]

The cyan dye represented by the general formula (I) of the present invention can control the sublimation transfer amount of the dye by changing the energy applied to the thermal head during thermal transfer, so that gradation recording can be performed. Easy and suitable for full color recording.

Furthermore, since it is stable against heat, light, moisture, chemicals, etc., it does not decompose during transfer recording, and the obtained record has excellent storage stability.

Since the dye of the present invention has good solubility in organic solvents and good dispersibility in water, it is easy to prepare a high-concentration ink which is uniformly dissolved or dispersed, and as a result, the color density is high. Is a practically valuable dye that can provide good recording of

[0077]

The present invention will be described below in detail with reference to examples.
Parts in the examples indicate parts by weight. % Indicates% by weight. Example 1 The synthesis of the following compound (A) was performed using 4-diethylamino-o-
10 parts of toluidine and 2-acetocarbonylamino-4-
In a solution of 13 parts of chloro-5-acetylaminophenol in 120 parts of methanol, 25% aqueous ammonia 27
Then, while maintaining the liquid temperature at 20 ° C., 24 parts of ammonium persulfate was added over about 1 hour, and the mixture was reacted at room temperature for 2 hours.

After the reaction, the precipitated product was filtered, washed well with water, and purified by column chromatography to obtain the desired product (A).

Further, using the compound of the following formula (A), preparation of an ink, a transfer sheet and a recording material were prepared as follows, and transfer recording was performed.

The maximum absorption wavelength (λmax) of the compound in chloroform was 624 nm.

[0081]

Embedded image (I) Preparation method of ink Dye of the above formula (A) 3 parts Polybutyral resin 4.5 {Methyl ethyl ketone 46.25} Toluene 46.25} Using a glass bead, the dye mixture of the above composition is applied to a paint conditioner for about 30. The ink was prepared by mixing for minutes. (Ii) Transfer sheet preparation method Using a gravure proofing machine (plate depth 30 μm), the above ink was heat-treated on its back surface to a 9 μm thick polyethylene terephthalate film so that the dry coating amount was 1.0 g / m ^2. And dried. (Iii) Preparation of recording material Polyester resin 0.8 part (vylon 103 Toyobo Tg = 47 ° C) EVA polymer plasticizer 0.2 part (Elvaloy 741p Mitsui Polychemicals Tg = -37 ° C) Amino-modified silicone 0.04 parts (KF-857, Shin-Etsu Chemical Co., Ltd.) Epoxy-modified silicone 0.04 parts (KF-103, Shin-Etsu Chemical Co., Ltd.) Methyl ethyl ketone / toluene / cyclohexane (weight ratio 4: 4: 2) 9.0 parts And then adjust the coating liquid and use synthetic paper (Oji Yuka,
Bar coater (RK Prin) on YUPO FPG 150
t Coat Instruments, N
o. It was applied at a rate of 4.5 g / m ² when dried using 1) and dried at 100 ° C. for 15 minutes. (Iv) Transfer recording The transfer sheet and the recording material are superposed on each other with the ink-coated surface and the coating liquid-coated surface facing each other. Recording was performed under the condition of 0 millisecond, and a cyan color recording with a color density of 1.90 was obtained.

The color density was measured using a densitometer RD-514 manufactured by Macbeth Co., USA (filter: Ratten N).
o. 58).

The color density was calculated by the following equation.

Color density = log ₁₀ (Io / I) Io = intensity of light reflected from a standard white reflector I = intensity of light reflected from a test object Using a meter (manufactured by Suga Test Instruments Co., Ltd.) at a black panel temperature of 63 ± 2 ° C., the color hardly changed after irradiation for 40 hours, and the image stability under high temperature and high humidity was excellent.

The fastness of the obtained recorded image was measured at 50 ° C.
After being left in the atmosphere for 48 hours, it was determined by the sharpness of the image and the coloring when the surface was rubbed with white paper.
The sharpness of the image did not change, the white paper was not colored, and the fastness of the recorded image was good. Example 2 Synthesis of the following formula compound (B) was performed using p-diethylamino-o-
11 parts of toluidine and 14 parts of 2-acetoethylcarbonylamino-4-chloro-5-acetylaminophenol were dissolved in a mixture of 63 parts of methanol and 38 parts of water,
27 parts of 25% aqueous ammonia was added, the liquid temperature was maintained at 20 ° C., and 76.6 parts of a 25% aqueous silver nitrate solution was added dropwise over about 1 hour, and the mixture was reacted at room temperature for 2 hours. After the reaction, the reaction product was extracted with chloroform, washed well with water, and purified by column chromatography to obtain the desired product (B).

The maximum absorption wavelength (λmax) of the compound in chloroform was 623 nm.

[0087]

Embedded image In the same manner as in Example 1, adjustment of ink, preparation of a transfer sheet and a recording material, and transfer recording were performed to obtain a cyan color record having a color density of 1.90.

All of these recordings were subjected to a light resistance test in the same manner as in Example 1. As a result, the recordings hardly changed, and the stability of images under high temperature and high humidity was excellent.

A fastness test was conducted in the same manner as in Example 1. As a result, the sharpness of the image did not change, the white paper was not colored, and the fastness of the recorded image was good. Examples -3 to 24 Cyan dyes shown in Table 1 were produced in the same manner as in Example 1, and adjustment of ink, preparation of a transfer sheet, preparation of a recording material, and transfer recording were performed in the same manner. Each record shown in Table 1 was obtained.

All of these recordings were subjected to a light resistance test in the same manner as in Example 1. As a result, the recordings hardly changed, and the stability of images under high temperature and high humidity was excellent.

A fastness test was conducted in the same manner as in Example 1. The sharpness of the image did not change, the white paper was not colored, and the fastness of the recorded image was good.

Table 1 shows the results of the measurement of the maximum transfer density and the results of the determination of light fastness and fastness.

[0093]

[Table 1]

[0094]

[Table 2]

[0095]

[Table 3]

[0096]

[Table 4] The evaluation results of light fastness and fastness were indicated by ○ for good results and × for poor results.

Comparative Example Preparation of ink, preparation of a transfer sheet, preparation of a recording material, and transfer recording were performed on the compounds shown in Table 2 in the same manner as in Example-1. Further, a light resistance test and a fastness test were performed in the same manner as in Example-1.

Table 2 also shows the results.

[0099]

[Table 5] The evaluation results of light fastness and fastness were indicated by ○ for good results and × for poor results.

Continued on the front page (72) Inventor Hitoshi Koshida 12-5-510 Koshienguchi Kitamachi, Nishinomiya City, Hyogo Prefecture 1-1-1, Machi Dai Nippon Printing Co., Ltd. (72) Inventor Hiroshi Eguchi 1-1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo Dainippon Printing Co., Ltd. (72) Inventor Kimiaki Kafuku Shinjuku-ku, Tokyo Ichigaya Kaga-cho 1-1-1, Dai Nippon Printing Co., Ltd. (56) References JP-A-5-8561 (JP, A) JP-A-1-178580 (JP, A) JP-A-61-57651 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B41M 5/38-5/40 CAPLUS (STN) REGISTRY (STN)

Claims (3)

(57) [Claims] 1. A compound represented by the following general formula (I) [Wherein, R ¹ and R ² represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, an alkoxy group, a cycloalkyl group, an aryl group, an alkenyl group, or an aralkyl group, and R ³ and R ⁴ represent R ^{5 to} R ⁸ represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group, an alkylcarbonylamino group, an alkoxycarbonylamino group, Formylamino group, alkylsulfonylamino group,
Or a halogen atom, R ^{9 to} R ¹⁰ represent a hydrogen atom, a substituted or unsubstituted alkyl group, an aralkyl group, an alkenyl group, or an aryl group, and n represents an integer of 0 to 8]. Dye for thermal transfer recording. 2. An ink for thermal transfer recording, comprising at least a dye for thermal transfer recording represented by the general formula (I) according to claim 1, a binder resin, and an organic solvent and / or water. Composition. 3. A dye comprising a base sheet and a dye supporting layer formed on one surface of the base sheet, wherein the dye contained in the dye supporting layer is represented by the general formula (I) according to claim 1. A transfer sheet, which is a dye for thermal transfer recording.