JP2022190784A - Inkjet ink composition and method for producing printed material - Google Patents

Abstract

To provide an inkjet ink composition that can form an image having excellent light resistance.SOLUTION: An inkjet ink composition contains a yellow dye, which is at least one selected from C.I. Disperse Yellow 54, C.I. Solvent Yellow 160: 1, C.I. Disperse Yellow 82, a blue dye, which is a compound represented by the following formula (I), an organic solvent, and water. (In the formula (I), R is a hydrogen atom or a C1-18 alkyl group, and the alkyl group may be branched. X is an oxygen atom or an imino group).SELECTED DRAWING: None

Description

The present invention relates to an inkjet ink composition and a method for producing a printed matter.

2. Description of the Related Art Dyeing (textile printing) of cloth or the like is performed using an inkjet recording method. Conventionally, screen printing, roller printing, etc. have been used as printing methods for fabrics (woven fabrics and non-woven fabrics). is advantageous.

As one mode of textile printing, there is a transfer type textile printing method using a sublimation dye. In such a textile printing method, the ink composition is not directly adhered to the medium to be printed (fabric, etc.). That is, after the ink composition is adhered to another medium (such as paper) as a transfer source, the dye is transferred from the other medium to the medium to be printed.

For example, in Patent Document 1, C.I. I. Disperse Yellow 82 and C.I. I. Disperse Blue 60 and C.I. I. A blue dye selected from Disperse Blue 360 is disclosed, and it is described that a bright green-tinged transfer can be obtained.

Japanese Unexamined Patent Application Publication No. 2020-104448

However, with the ink described in Patent Document 1, the lightfastness of the resulting image was not necessarily good. Poor lightfastness of the image can result in fading or discoloration when the image is exposed to light.

One aspect of the inkjet ink composition according to the present invention is
As a yellow dye, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. one or more selected from Disperse Yellow 82;
As a blue dye, a compound represented by the following formula (I),
an organic solvent;
water and,
including.

（式（Ｉ）中、Ｒは、水素原子又は炭素数１以上１８以下のアルキル基を表し、前記アルキル基は分岐していてもよい。Ｘは、酸素原子又はイミノ基を表す。）

(In Formula (I), R represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and the alkyl group may be branched. X represents an oxygen atom or an imino group.)

One aspect of the method for producing a printed matter according to the present invention is
The above-mentioned inkjet ink composition is attached to the recording surface of a transfer paper by an inkjet method, and the recording surface and the recording medium are opposed to each other and heated to perform thermal transfer.

Embodiments of the present invention are described below. The embodiments described below illustrate examples of the invention. The present invention is by no means limited to the following embodiments, and includes various modifications implemented within the scope of the present invention. Note that not all of the configurations described below are essential configurations of the present invention.

As used herein, "(meth)acryl" represents acrylic or methacrylic, and "(meth)acrylate" represents acrylate or methacrylate.

1. Inkjet Ink Composition The inkjet ink composition of the present embodiment contains C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. Disperse Yellow 82, one or more selected from Disperse Yellow 82, a compound represented by Formula (I) described below as a blue dye, an organic solvent, and water.

1.1. Yellow Dye The inkjet ink composition of the present embodiment contains C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Contains one or more selected from Disperse Yellow 82. The inkjet ink composition is a C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. By containing at least one of Disperse Yellow 82, an image having good light fastness and good color development can be formed on a fabric or the like.

C. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. The total content of Disperse Yellow 82 in the total amount of the inkjet ink composition is 0.2% by mass or more and 15.0% by mass or less, preferably 0.5% by mass or more and less than 15.0% by mass, more preferably 0.5% by mass. % by mass or more and 14.0% by mass or less, more preferably 5.0% by mass or more and 12.0% by mass or less. C. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. If the total content of Disperse Yellow 82 with respect to the total amount of the inkjet ink composition is within this range, it is easy to dye fabric or the like green with good lightfastness. In addition, since these dyes have relatively good dispersion stability, the dispersion stability of the inkjet ink composition can be ensured.

1.2. Blue Dye The inkjet ink composition of the present embodiment contains a compound represented by the following formula (I) as a blue dye. By including a compound represented by the following formula (I), the inkjet ink composition can form an image with good lightfastness and color development properties on a fabric or the like.

（式（Ｉ）中、Ｒは、水素原子又は炭素数１以上１８以下のアルキル基を表し、前記アルキル基は分岐していてもよい。Ｘは、酸素原子又はイミノ基を表す。）

(In Formula (I), R represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and the alkyl group may be branched. X represents an oxygen atom or an imino group.)

Here, in formula (I), R is more preferably an alkyl group having 1 to 18 carbon atoms, more preferably an alkyl group having 1 to 15 carbon atoms, and 1 to 10 carbon atoms. is more preferably an alkyl group of

The inkjet ink composition may contain multiple types of compounds represented by Formula (I). The total content of the compound represented by formula (I) with respect to the total amount of the inkjet ink composition is 0.2% by mass or more and 15.0% by mass or less, preferably 0.5% by mass or more and less than 15.0% by mass, It is more preferably 0.5% by mass or more and 14.0% by mass or less, and still more preferably 5.0% by mass or more and 12.0% by mass or less. If the total content of the compound represented by the formula (I) with respect to the total amount of the inkjet ink composition is within this range, it is easy to dye fabric or the like green with good lightfastness. In addition, the compound represented by formula (I) has relatively good dispersion stability, so that the dispersion stability of the inkjet ink composition can be ensured.

1.3. Organic Solvent The inkjet ink composition of the present embodiment contains an organic solvent. By including an organic solvent in the inkjet ink composition, the ejection stability of the inkjet ink composition by an inkjet method can be improved, and moisture evaporation from the recording head during long-term standing can be effectively suppressed. Also, the organic solvent may function as a moisturizing agent.

Examples of organic solvents include polyol compounds and glycol ethers.

The polyol compound includes, for example, a polyol compound, preferably a diol compound, having 2 to 6 carbon atoms in the molecule and optionally having one ether bond in the molecule. Specific examples include 1,2-pentanediol, glycerin, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, polyoxyethylene polyoxypropylene glycol, 1, 2-hexanediol, 1,2-heptanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 2-methyl -3-phenoxy-1,2-propanediol, 3-(3-methylphenoxy)-1,2-propanediol, 3-hexyloxy-1,2-propanediol, 2-hydroxymethyl-2-phenoxymethyl- 1,3-propanediol, 3-methyl-1,3-butanediol, 1,3-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,4-butanediol, 1,5- Examples include glycols such as pentanediol, 1,6-hexanediol, 2-methyl-2,4-pentanediol, and 3-methyl-1,5-pentanediol.

Examples of glycol ethers include monoalkyl ethers of glycols selected from ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, and polyoxyethylene polyoxypropylene glycol. mentioned. Among the monoalkyl ethers, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, dipropylene glycol monopropyl ether and the like can be mentioned.

A plurality of organic solvents may be mixed and used. In addition, the content of the organic solvent is 0.2% by mass or more and 70.0% by mass or less with respect to the total mass of the inkjet ink composition from the viewpoint of adjusting the viscosity of the inkjet ink composition and reducing clogging due to the moisturizing effect. is preferably 1.0% by mass or more and 60.0% by mass or less, more preferably 5.0% by mass or more and 50.0% by mass or less, and 10.0% by mass or more It is even more preferably 40.0% by mass or less. When the content of the organic solvent is within the above range, the viscosity of the inkjet ink composition can be easily adjusted to be suitable for the inkjet method, and a moisturizing effect can be obtained, so clogging of ejection nozzles, for example, can be reduced.

1.4. Water The inkjet ink composition of the present embodiment contains water. Examples of water include pure water such as ion-exchanged water, ultrafiltrated water, reverse osmosis water, and distilled water, and water from which ionic impurities are removed as much as possible, such as ultrapure water. In addition, the use of water sterilized by ultraviolet irradiation, addition of hydrogen peroxide, or the like can suppress the generation of bacteria and fungi when the ink composition is stored for a long period of time.

The content of water is preferably 40.0% by mass or more and 90.0% by mass or less, and preferably 50.0% by mass or more and 85.0% by mass or less, relative to the total amount of the inkjet ink composition. more preferred. When the water content is within this range, it is easy to adjust the viscosity of the inkjet ink composition to one suitable for the inkjet method.

1.5. Content Ratio of Yellow Dye and Blue Dye There is a more suitable range for the content ratio of the yellow dye and the blue dye described above. That is, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. The mass-based ratio (Y:B) of the total content (Y) of one or more selected from Disperse Yellow 82 and the total content (B) of the compound represented by formula (I) is 1 :3 to 3:1 is more preferred. Also. The ratio (Y:B) is more preferably 1:2 to 3:1, particularly preferably 1:1. When the ratio (Y:B) is within such a range, it is easy to form an image with better lightfastness and a hue closer to green.

1.6. Other Ingredients 1.6.1. Other Dyes The inkjet ink composition of the present embodiment contains C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. One or more selected from Disperse Yellow 82 and the compound represented by formula (I) alone may be included, but other dyes may be included for the purpose of adjusting the hue obtained in the fabric or the like.

Other dyes include, but are not limited to, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Yellow dyes other than Disperse Yellow 82, C.I. I. Disperse Blue 60, C.I. I. Blue dyes, orange dyes, red dyes, violet dyes, green dyes, brown dyes, black dyes, etc. other than Disperse Blue 359 and compounds represented by formula (I) can be mentioned. These dyes are preferably sublimation dyes.

C. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Examples of yellow dyes other than Disperse Yellow 82 include C.I. I. Disperse Yellow 1, 3, 4, 5, 7, 8, 9, 13, 16, 23, 24, 30, 31, 33, 34, 39, 41, 42, 44, 49, 50, 51, 56, 58, 60, 61, 63, 64, 66, 68, 71, 74, 76, 77, 78, 79, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 108, 114, 116, 118, 119, 122, 124, 126, 135, 140, 141, 149, 153, 160, 162, 163, 164, 165, 179, 180, 182, 183, 184, 186, 192, 198, 199, 201, 202, 204, 210, 211, 215, 216, 218, 224, 227, 231, 232, 233, 245, C.I. I. Solvent Yellow 2, 6, 14, 16, 21, 25, 29, 30, 33, 51, 56, 77, 80, 88, 89, 93, 112, 113, 114, 116, 136, 150, 155, 157, 163, 176, 179, 199 and the like.

C. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. A plurality of types of yellow dyes other than Disperse Yellow 82 may be used, and the total content thereof is C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. It is arbitrary as long as the total content of Disperse Yellow 82 is in the range of 0.2% by mass or more and 15.0% by mass or less.

However, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Yellow dyes other than Disperse Yellow 82 are C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Compared to the content of Disperse Yellow 82, the smaller the content, the better from the standpoint of light resistance. For example, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Yellow dyes other than Disperse Yellow 82 are preferably contained to such an extent that the hue is finely adjusted. Also, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1 and C.I. I. Even if a yellow dye other than Disperse Yellow 82 is used, an image having sufficient color development properties can be formed.

Blue dyes other than the compound represented by formula (I) include, for example, C.I. I. Disperse Blue 3, 5, 6, 7, 9, 14, 16, 19, 20, 24, 26, 26: 1, 27, 35, 43, 44, 52, 54, 55, 56, 58, 60, 61, 62, 64, 64:1, 71, 72, 72:1, 73, 75, 77, 77:1, 79, 81, 81:1, 82, 83, 85, 87, 88, 90, 91, 93, 94, 95, 96, 99, 102, 106, 108, 112, 113, 115, 118, 120, 122, 125, 128, 130, 131, 139, 141, 142, 143, 145, 146, 148, 149, 153, 154, 158, 165, 167, 171, 173, 174, 176, 181, 183, 185, 186, 187, 189, 197, 198, 200, 201, 205, 207, 211, 214, 224, 225, 241, 257, 259, 267, 268, 270, 284, 285, 287, 288, 291, 293, 295, 297, 301, 315, 330, 333, 354, 359, 360, 367, C.I. I. Solvent Blue 2, 11, 14, 24, 25, 35, 36, 38, 48, 55, 59, 63, 67, 68, 70, 73, 83, 105, 111, 132 and the like.

A plurality of types of blue dyes other than the compound represented by formula (I) may be used, and the total content thereof is such that the total content of the blue dyes other than the compound represented by formula (I) is 0.5. It is arbitrary as long as it is in the range of 2% by mass or more and 15.0% by mass or less.

However, the content of the blue dye other than the compound represented by formula (I) is preferably less than the content of the blue dye other than the compound represented by formula (I) in terms of light resistance. For example, blue dyes other than the compound represented by formula (I) are preferably contained to such an extent that the hue is finely adjusted. An image having sufficient color development properties can also be formed by using a blue dye other than the compound represented by formula (I).

In the inkjet ink composition, the content (Y') of any kind of yellow dye and the content (B') of any kind of blue dye are also in a ratio (Y':B') of 1. :3 to 3:1 is more preferred. Also. The ratio (Y':B') is more preferably 1:2 to 3:1, particularly preferably 1:1. When the ratio (Y':B') is within such a range, it is easy to form an image with better lightfastness and a hue closer to green.

Examples of orange dyes include C.I. I. Disperse Orange 1, 1:1, 3, 5, 7, 11, 13, 17, 20, 21, 25, 25: 1, 29, 30, 31, 32, 33, 37, 38, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 61, 66, 71, 73, 76, 78, 80, 89, 90, 91, 93, 96, 97, 119, 127, 130, 139, 142, C.I. I. Solvent Orange 1, 2, 14, 45, 60 and the like.

Examples of red dyes include C.I. I. Disperse Red 1, 4, 5, 6, 7, 11, 12, 13, 15, 17, 27, 43, 44, 50, 52, 53, 54, 55, 55:1, 56, 58, 59, 60, 65, 70, 72, 73, 74, 75, 76, 78, 81, 82, 83, 84, 86, 86: 1, 88, 90, 91, 92, 93, 96, 97, 99, 100, 101, 103, 104, 105, 106, 107, 108, 110, 111, 113, 116, 117, 118, 121, 122, 125, 126, 127, 128, 129, 131, 132, 134, 135, 137, 143, 145, 146, 151, 152, 153, 154, 157, 158, 159, 164, 167, 167:1, 169, 177, 179, 181, 183, 184, 185, 188, 189, 190, 190:1, 191, 192, 200, 201, 202, 203, 205, 206, 207, 210, 221, 224, 225, 227, 229, 239, 240, 257, 258, 277, 278, 279, 281, 288, 298, 302, 303, 310, 311, 312, 320, 324, 328, C.I. I. Solvent Red 1, 3, 7, 8, 9, 18, 19, 23, 24, 25, 27, 49, 100, 109, 121, 122, 125, 127, 130, 132, 135, 218, 225, 230 etc. is mentioned.

Although the red dye may be contained in the inkjet ink composition, it is more preferable not to contain it. A red dye can be combined with the above-mentioned yellow dye and blue dye to form a so-called composite black. Therefore, it is preferable that the inkjet ink composition does not contain a red dye in order to increase the saturation of the resulting image.

Violet dyes include, for example, C.I. I. Disperse Violet 1, 4, 8, 10, 17, 18, 23, 24, 26, 27, 28, 29, 30, 31, 33, 35, 36, 37, 38, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61, 63, 69, 77, C.I. I. Solvent Violet 13 and the like.

Examples of green dyes include C.I. I. Disperse Green 9, C.I. I. Solvent Green 3 etc. are mentioned.

Brown dyes include, for example, C.I. I. Disperse Brown 1, 2, 4, 9, 13, 19, C.I. I. Solvent Brown 3, 5 and the like can be mentioned.

Examples of black dyes include C.I. I. Disperse Black 1, 2, 3, 10, 24, 26, 27, 28, 30, 31, C.I. I. Solvent Black 3, 5, 7, 23, 27, 28, 29, 34 and the like.

The sublimation dyes exemplified above may be used singly or in combination of two or more.

The term "sublimation dye" as used herein means a dye that sublimates when heated. Such dyes are suitable for dyeing fabrics using sublimation transfer, that is, for textile printing. Sublimation dyes are suitable for dyeing hydrophobic synthetic fibers such as polyester, nylon and acetate. Sublimation dyes are compounds that are insoluble or sparingly soluble in water, and have the property of sublimating upon heating. In this specification, a dye having a sublimation property is referred to as a sublimation dye, regardless of whether it is classified as a disperse dye, an oil-soluble dye, or the like.

As a textile printing method using such sublimation transfer, for example, printing is performed by an inkjet method using an ink containing a sublimation dye on a sheet-like intermediate transfer medium such as paper as a transfer source, and then a fabric or the like is printed. There is a method of superimposing an intermediate transfer medium on a recording medium and performing sublimation transfer by heating. As another method, the ink-receiving layer of a recording medium provided with a peelable ink-receiving layer such as a film product is printed by an inkjet method using a sublimation transfer ink, and then heated as it is to form the lower layer side. For example, the recording medium is subjected to sublimation diffusion dyeing, and then the ink-receiving layer is peeled off.

All of the sublimation dyes exemplified above are compounds that are insoluble or sparingly soluble in water, but can be satisfactorily dispersed in water within a specific concentration range, for example, by using a dispersant to be described later. In addition, in the case of an oil-soluble dye, it is also called emulsification. Further, the sublimation dyes exemplified above have slightly different dispersibility. That is, the suitable concentration range of the dispersant differs depending on the type of sublimation dye, and the dispersibility also varies depending on the type of dispersant.

The total content of dyes in the inkjet ink composition is preferably 0.4% by mass or more and 30.0% by mass or less, and 1.0% by mass or more and 25.0% by mass, based on 100% by mass of the inkjet ink composition. It is more preferably 0% by mass or less, even more preferably 5.0% by mass or more and 23.0% by mass or less, and even more preferably 10.0% by mass or more and 20.0% by mass or less. When the content of the dye in the inkjet ink composition is within this range, it is possible to sufficiently form an image with a high color developability, ie, a high OD value, on the resulting transferred material.

1.6.2. Dispersant The inkjet ink composition of the present embodiment may contain a dispersant. The dispersant has a function of stably dispersing the above dye in the inkjet ink composition. Dispersants include, but are not limited to, anionic dispersants, nonionic dispersants, and polymeric dispersants. Among the dispersants exemplified below, an anionic dispersant is more preferably used in terms of superior dispersion stability of the inkjet ink composition.

Preferred anionic dispersants include formalin condensates of aromatic sulfonic acids. The "aromatic sulfonic acid" in the formalin condensate of aromatic sulfonic acid includes, for example, creosote oil sulfonic acid, cresol sulfonic acid, phenolsulfonic acid, β-naphtholsulfonic acid, methylnaphthalenesulfonic acid, butylnaphthalenesulfonic acid, and the like. alkylnaphthalenesulfonic acid, a mixture of β-naphthalenesulfonic acid and β-naphtholsulfonic acid, a mixture of cresolsulfonic acid and 2-naphthol-6-sulfonic acid, and ligninsulfonic acid.

As the anionic dispersant, a formalin condensate of β-naphthalenesulfonic acid, a formalin condensate of alkylnaphthalenesulfonic acid, and a formalin condensate of creosote oil sulfonic acid are preferred. Among these, the formalin condensate of β-naphthalenesulfonic acid is particularly preferred.

Examples of nonionic dispersants include phytosterol-ethylene oxide adducts and cholestanol-ethylene oxide adducts.

Examples of polymer dispersants include polyacrylic acid partial alkyl esters, polyalkylenepolyamines, polyacrylates, styrene-acrylic acid copolymers, vinylnaphthalene-maleic acid copolymers, and the like.

A dispersing agent may be used individually by 1 type, or may use 2 or more types together. The total content of the dispersant is 0.1% by mass or more and 30.0% by mass or less, preferably 0.4% by mass or more and 30.0% by mass or less, and more preferably 100% by mass of the inkjet ink composition. is 1.0% by mass or more and 25.0% by mass or less, more preferably 10.0% by mass or more and 23.0% by mass or less, and even more preferably 15.0% by mass or more and 20.0% by mass or less. When the content of the dispersant is 0.1% by mass or more, the dispersion stability of the dye can be ensured. Moreover, when the content of the dispersant is 30.0% by mass or less, the dye is not dissolved excessively, and the viscosity can be kept low.

1.6.3. Other ingredients (surfactant)
The inkjet ink composition may contain a surfactant. Surfactants have the function of adjusting surface tension. Surfactants are used to adjust the wettability of the ink to printing substrates and discharge channels by lowering the surface tension when dissolved in water. agent-based surfactants.

Examples of water-soluble solvent-based surfactants include lower alcohols such as ethanol, propanol and butanol, butylene glycol, 1,3-pentanediol, 2-ethyl-1,3-propanediol and 1,6-hexanediol. and other glycol monoethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether and propylene glycol monomethyl ether.

The surfactant-based surfactant can be appropriately selected from, for example, nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. Of these, acetylene glycol-based surfactants and silicone-based surfactants, which have high surface activity and low foaming properties, are more preferred.

The acetylene glycol-based surfactant is not particularly limited as a commercial product, but for example, manufactured by Nissin Chemical Industry Co., Ltd., Olfin E1004, E1010, E1020, PD-001, PD-002W, PD-004, PD-005. , EXP. 4200, EXP. 4123, EXP. 4300, Surfynol 440, 465, 485, CT111, C
T121, TG, GA, Dynol 604, 607, acetylenol E40, E60, E100 manufactured by Kawaken Fine Chemicals Co., Ltd., and the like.

Examples of silicone-based surfactants include polysiloxane-based compounds and polyether-modified organosiloxanes. Commercial products of silicone surfactants are not particularly limited, but for example BYK-306, BYK-307, BYK-333, BYK-341, BYK-345, BYK-346, BYK manufactured by BYK-Chemie Japan Co., Ltd. -347, BYK-348, BYK-349, manufactured by Shin-Etsu Chemical Co., Ltd., KF-351A, KF-352A, KF-353, KF-354L, KF-355A, KF-615A, KF-945, KF-640, KF -642, KF-643, KF-6020, X-22-4515, KF-6011, KF-6012, manufactured by Nissin Chemical Industry Co., Ltd., Silface SAG002, 005, 503A, 008 and the like.

The surfactant content is preferably 0.01% by mass or more and 2.0% by mass or less, and 0.1% by mass or more and 1.5% by mass or less, based on the total mass of the inkjet ink composition. It is more preferable to have

(pH adjuster)
The inkjet ink composition may contain a pH adjuster. Examples of pH adjusters include, but are not particularly limited to, acids, bases, weak acids, and appropriate combinations of weak bases. Examples of acids and bases used in such combinations include inorganic acids such as sulfuric acid, hydrochloric acid and nitric acid, and inorganic bases such as lithium hydroxide, sodium hydroxide, potassium hydroxide, potassium dihydrogen phosphate and dihydrogen phosphate. sodium, potassium carbonate, sodium carbonate, sodium hydrogencarbonate, ammonia and the like, and organic bases such as triethanolamine, diethanolamine, monoethanolamine, tripropanolamine, triisopropanolamine, diisopropanolamine, trishydroxymethylaminomethane ( THAM) and the like, and examples of organic acids include adipic acid, citric acid, succinic acid, lactic acid, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), 4-(2-hydroxy ethyl)-1-piperazineethanesulfonic acid (HEPES), morpholinoethanesulfonic acid (MES), carbamoylmethyliminobisacetic acid (ADA), piperazine-1,4-bis(2-ethanesulfonic acid) (PIPES), N- Goods such as (2-acetamido)-2-aminoethanesulfonic acid (ACES), colamin hydrochloride, N-tris(hydroxymethyl)methyl-2-aminoethanesulfonic acid (TES), acetamidoglycine, tricine, glycinamide, bicine, etc. Buffers, phosphate buffers, citrate buffers, Tris buffers and the like may be used. Furthermore, among these, as part or all of the pH adjuster, tertiary amines such as triethanolamine and triisopropanolamine, and carboxyl group-containing organic acids such as adipic acid, citric acid, succinic acid, and lactic acid, It is preferable because the pH buffering effect can be obtained more stably.

(moisturizer)
The inkjet ink composition may contain a humectant. As the moisturizing agent, any one that is generally used in an inkjet ink composition can be used without particular limitation.

Specific examples of humectants that also function as organic solvents include diethylene glycol, triethylene glycol, tetraethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3- Polyols such as hexanediol, 2-methyl-2,4-pentanediol, tripropylene glycol, isobutylene glycol, glycerin, diglycerin, mesoerythritol, trimethylolpropane, pentaerythritol and dipentaerythritol can be mentioned. Specific examples of other moisturizing agents include lactams such as 2-pyrrolidone, N-methyl-2-pyrrolidone, ε-caprolactam and hydroxyethylpyrrolidone, urea, thiourea, ethyleneurea, 1,3-dimethylimidazo Urea derivatives such as lysinones, monosaccharides and disaccharides such as glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucitol (sorbitol), maltose, cellobiose, lactose, sucrose, trehalose, and maltotriose , oligosaccharides, polysaccharides and derivatives of these sugars, glycine, betaines of trimethylglycine, and the like.

Sugars are intended to refer to oligosaccharides and polysaccharides, including monosaccharides, disaccharides, trisaccharides and tetrasaccharides. Examples of sugars include threose, erythrulose, erythrose, arabinose, ribulose, ribose, xylose, xylulose, lyxose, glucose, fructose, mannose, idose, sorbose, gulose, talose, tagatose, galactose, allose, psicose, altrose, and maltose. , isomaltose, cellobiose, lactose, sucrose, trehalose, isotrehalose, gentiobiose, melibiose, turanose, sophorose, isosaccharose, glucan, fructan, mannan, xylan, galacturonan, mannuronan, homoglycans such as N-acetylglucosamine polymers, diheteroglycans Glycans, heteroglycans such as triheteroglycans, maltotriose, isomaltotriose, panose, maltotetraose, maltopentaose and the like.

In the present embodiment, when the inkjet ink composition contains a humectant, the content is preferably 0.2% by mass or more and 30.0% by mass or less with respect to the total mass of the inkjet ink composition. , more preferably 1.0% by mass or more and 25% by mass or less.

(chelating agent)
The inkjet ink composition may contain a chelating agent. Chelating agents include, for example, ethylenediaminetetraacetic acid and salts thereof. The salts include, for example, ethylenediaminetetraacetic acid dihydrogen disodium salt, or ethylenediamine nitrilotriacetate, hexametaphosphate, pyrophosphate, or metaphosphate.

(preservative, antifungal agent)
Antiseptics and antifungal agents may be used in the ink jet ink composition, if desired. Examples of antiseptics and fungicides include sodium benzoate, pentachlorophenol sodium, 2-pyridinethiol-1-oxide sodium, sodium sorbate, sodium dehydroacetate, 1,2-dibenzisothiazolin-3-one, 4 -chloro-3-methylphenol and the like.

(others)
Furthermore, as components other than the above, the inkjet ink composition includes additives that can be normally used in inkjet ink compositions, such as rust inhibitors, oxidation inhibitors, ultraviolet absorbers, oxygen absorbers, and dissolution aids. may be contained as necessary.

1.7. Physical Properties and Production of Inkjet Ink Composition The surface tension of the inkjet ink composition at 25.0° C. is preferably 10.0 mN/m or more and 40.0 mN/m, more preferably 25.0 mN/m or more and 40.0 mN/m. The following are more preferable. Surface tension is measured by confirming the surface tension when a platinum plate is wetted with the composition in an environment of 25.0 ° C. using an automatic surface tension meter CBVP-Z manufactured by Kyowa Interface Science Co., Ltd. can be done.

The viscosity of the inkjet ink composition at 20.0° C. is preferably 1.5 mPa·s or more and 10.0 mPa·s or less, more preferably 2.0 mPa·s or more and 8.0 mPa·s or less. In order to make the surface tension and viscosity within the above ranges, for example, the types of the above-mentioned organic solvents and surfactants and the amounts of these and water to be added may be appropriately adjusted. The viscosity is measured by increasing the shear rate from 10 to 1000 in an environment of 20.0 ° C using a viscoelasticity tester MCR-300 manufactured by Anton Paar Japan Co., Ltd. When the shear rate is 200 can be measured by reading the viscosity of

The inkjet ink composition preferably has a pH of 5.8 or more and 10.5 or less, more preferably 6.0 or more and 10.0 or less. If the pH of the inkjet ink composition is within this range, for example, corrosion of the members of the recording head and the inkjet recording apparatus can be suppressed.

The inkjet ink composition is obtained by mixing the components described above in an arbitrary order, and filtering or the like as necessary to remove impurities. As a method for mixing each component, a method of sequentially adding the materials to a container equipped with a stirring device such as a mechanical stirrer or a magnetic stirrer and stirring and mixing them is preferably used. Alternatively, the dye may be blended in the form of a dispersion that has been previously dispersed with a dispersant.

1.8. Functions and Effects The inkjet ink composition according to the present embodiment can be suitably applied to textile printing methods for fabrics and the like using sublimation transfer. That is, by using the inkjet ink composition according to the present embodiment in a method for producing a printed matter, which will be described later, a transfer image is formed by adhering it onto a transfer paper by an inkjet method, and the transfer image is transferred to a fabric. As a result, a transferred product having good light resistance can be obtained. In addition, since the inkjet ink composition according to the present embodiment is one ink composition containing a yellow dye and a blue dye, by adhering it to a transfer paper or the like, an image of a predetermined hue can be obtained while suppressing uneven aggregation. Obtainable. On the other hand, when an image of a given hue is obtained by mixing an ink composition containing a similar yellow dye and an ink composition containing a similar blue dye on transfer paper or the like, Aggregation unevenness is likely to occur.

2. Method for producing printed matter In the method for producing a printed matter according to the present embodiment, the above-described inkjet ink composition is applied to the recording surface of a transfer paper by an inkjet method, and the recording surface and the recording medium are opposed to each other and heated to perform thermal transfer. including doing

Here, as a method for producing a printed matter using sublimation transfer, for example, an inkjet ink composition containing a sublimation dye is used to print a transfer image on a sheet-like intermediate transfer medium such as transfer paper by an inkjet method. After forming, an intermediate transfer medium is superimposed on a recording medium (transfer destination medium) such as cloth, and a transfer image obtained by heating is subjected to sublimation transfer.

That is, the method for producing a printed matter according to the present embodiment includes at least an ink deposition step of ejecting the above-described inkjet ink composition from a recording head and depositing it on a transfer paper, and applying a dye contained in the inkjet ink composition to the transfer paper. and a transfer step of sublimating and transferring the image onto a recording medium.

2.1. Ink Adhesion Step In this step, the inkjet ink composition is ejected from a recording head and adhered to the recording surface of a transfer paper, which is an intermediate transfer medium, to form a transferred image using an inkjet method. Ejection of the inkjet ink composition by the inkjet method can be performed using, for example, a droplet ejection device such as an inkjet recording device.

Usable inkjet recording apparatuses have at least an ink container such as a cartridge or a tank containing the above-described inkjet ink composition and a recording head connected thereto, and the inkjet ink composition is ejected from the recording head. There is no particular limitation as long as an image can be formed on the transfer paper, which is an intermediate transfer medium. Moreover, as an inkjet recording apparatus, either a serial type or a line type can be used. These types of ink jet recording apparatuses are equipped with a recording head, and while changing the relative positional relationship between the transfer paper and the recording head, droplets of the ink composition are ejected from the nozzle holes of the recording head at a predetermined timing. and intermittently and at a predetermined volume. Thereby, a predetermined transfer image can be formed by adhering the inkjet ink composition to the transfer paper.

Generally, in a serial type inkjet recording apparatus, the direction of transport of the transfer paper and the direction of reciprocating motion of the recording head intersect. Change the relative positional relationship with the head. Further, in this case, generally, a plurality of nozzle holes are arranged in the recording head, and rows of nozzle holes, ie, nozzle rows, are formed along the conveying direction of the transfer paper. In some cases, the recording head is formed with a plurality of nozzle rows depending on the type and number of ink-jet ink compositions.

Further, in general, in a line-type inkjet recording apparatus, the recording head does not reciprocate, and the relative positional relationship between the transfer paper and the recording head is changed by conveying the transfer paper. Also in this case, generally, a plurality of nozzle holes are arranged in the recording head, and nozzle rows are formed along a direction intersecting the transport direction of the transfer paper.

The inkjet recording method is not particularly limited as long as the inkjet ink composition can be ejected as droplets from fine nozzle holes and the droplets can be adhered to the transfer paper. For example, as an inkjet recording method, a piezo method, a method in which ink is ejected by bubbles generated by heating the ink, or the like can be used. In the present embodiment, it is preferable to use the piezo system from the viewpoint of the resistance to deterioration of the ink composition.

For the inkjet recording apparatus used in this embodiment, for example, known configurations such as a heating unit, a drying unit, a roll unit, and a winding device can be employed without limitation.

In the present embodiment, as the transfer paper which is an intermediate transfer medium, for example, a recording medium provided with an ink receiving layer such as paper such as plain paper, special paper for inkjet, coated paper, etc. can be used. Paper having an ink-receiving layer made of inorganic fine particles such as a paper is preferable. As a result, it is possible to obtain an intermediate recorded matter in which bleeding or the like is suppressed on the recording surface during the drying process of the inkjet ink composition applied to the intermediate transfer medium. Further, with such a medium, the sublimation dye can be more easily retained on the surface of the recording surface, and the dye can be sublimated more efficiently in the subsequent transfer process.

2.2. Transfer Step In the method for producing a printed matter according to the present embodiment, the recording surface of the transfer paper to which the inkjet ink composition is applied is opposed to a recording medium such as a polyester fabric to be printed, that is, the transfer paper. A transfer step is included in which the fabric or the like placed on the recording surface is heated to sublime the sublimation dye contained in the inkjet ink composition onto the material to be printed and transferred to the fabric or the like. As a result, a printed material, that is, a printed material, is obtained by using a fabric or the like as the material to be printed.

The heating temperature in the transfer step is not particularly specified, but is preferably 160.0° C. or higher and 220.0° C. or lower, and preferably 170.0° C. or higher and 200.0° C. or lower. As a result, sufficient energy can be applied to transfer the sublimation dye to the material to be printed, and the productivity of the printed material can be improved.

The heating time in the transfer step is preferably 30.0 seconds or more and 90.0 seconds or less, more preferably 45.0 seconds or more and 60.0 seconds or less, although it depends on the heating temperature. As a result, sufficient energy can be obtained to transfer the sublimation dye to the material to be printed, and the productivity of the printed material can be particularly excellent.

The transfer process may be carried out by heating the transfer paper to which the inkjet ink composition is applied while facing the material to be printed. It is preferable to carry out by As a result, for example, a printed matter in which a clearer image is recorded on a cloth or the like can be obtained.

Examples of the recording medium, that is, the material to be printed include polyester fabric, which is a hydrophobic fiber fabric. You may use the thing which has a typical shape.

2.3. Other Steps The method of manufacturing a printed matter according to the present embodiment may include a step of heating the transfer paper after the ink adhesion step. This step is a step in which the inkjet ink composition is ejected onto transfer paper and then heated. By carrying out this step, drying of the ink-jet ink composition deposited in the ink deposition step is accelerated, and blurring of the image is suppressed, and set-off may also be suppressed in some cases. The set-off refers to a phenomenon in which the components of the inkjet ink composition move to the back surface in contact with the recording surface when the transfer papers are stacked, for example, when the transfer papers are rolled up.

The temperature reached by the transfer paper in this step is preferably 60.0° C. or higher, more preferably 70.0° C. or higher and 120.0° C. or lower. Within such a range, the sublimation dye is less likely to sublime, and a good drying rate can be obtained.

According to the method for producing a printed matter according to the present embodiment, since the inkjet ink composition described above is used, it is possible to produce a printed matter on which an image having good light resistance is formed.

3. EXAMPLES AND COMPARATIVE EXAMPLES Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples. Hereinafter, "parts" and "%" are based on mass unless otherwise specified. The evaluation was performed under an environment of 25.0° C. temperature and 40.0% relative humidity unless otherwise specified.

3.1. Preparation of ink composition Each component was placed in a container so as to have the composition shown in Table 1, and after mixing and stirring with a magnetic stirrer for 2 hours, the mixture was dispersed in a bead mill filled with zirconia beads having a diameter of 0.3 mm. was thoroughly mixed by performing After stirring for 1 hour, the mixture was filtered using a 5.0 μm PTFE membrane filter to obtain ink compositions according to Examples and Comparative Examples. Numerical values in Table 1 indicate % by mass. Ion-exchanged water was used as water, and was added so that the weight of each ink composition was 100% by weight.

Among the components shown in Table 1, the components other than the compound names are as follows.
- SY160:1 = C.I. I. Solvent Yellow 160:1
- DY54 = C.I. I. Disperse Yellow 54
- DY82 = C.I. I. Disperse Yellow 82
- Compound A = compound represented by the following formula (I _A ) (compound obtained by Production Example 1 below)
- Compound B = compound represented by the following formula (I _B ) (compound obtained in Production Example 2 below)
· DB60 = C.I. I. Disperse Blue 60
· DB360 = C.I. I. Disperse Blue 360
· DB183 = C.I. I. Disperse Blue 183
· DB72 = C.I. I. Disperse Blue 72
- DB359 = C.I. I. Disperse Blue 359
・ NSNaF = sodium naphthalene sulfonate formalin condensate (“Demoll NL” manufactured by Kao Corporation)
・BYK348 = BYK-Chemie Japan Co., Ltd., trade name “BYK (registered trademark)-348” (polyether-modified siloxane surfactant)

The compound represented by the above formula (I _A ) was produced as follows.
3 parts of 1,4-diamino-2,3-anthraquinonedicarboximide and 25 parts of 3-aminopentane were added to 75 parts of sulfolane to obtain a liquid. The resulting liquid was heated to 140° C. in an autoclave, reacted for 6 hours, and then cooled to room temperature to obtain a liquid. A solid precipitated from the resulting liquid was separated by filtration, washed with 100 parts of methanol and 200 parts of water, and dried to obtain 3.1 parts of the compound represented by the above formula ( _IA ).

The compound represented by the above formula (I _B ) was produced as follows.
A solution was obtained by adding 3.0 parts of 1,4-diamino-2,3-anthraquinonedicarboximide and 25 parts of 1-aminobutane to 75 parts of sulfolane. The resulting liquid was heated to 140° C. in an autoclave, reacted for 6 hours, and then cooled to room temperature to obtain a liquid. A solid precipitated from the resulting liquid was separated by filtration, washed with 100 parts of methanol and 200 parts of water, and then dried to obtain 2.9 parts of the compound represented by the above formula (I _B ).

3.2. Preparation of Printed Matter The inkjet ink composition of each example was filled in an ink cartridge, and the ink cartridge was installed in an inkjet printer (PX-H6000, manufactured by Seiko Epson Corporation).

Using this inkjet printer, the inkjet ink composition of each of the above examples was ejected, and a solid pattern was printed on an intermediate transfer medium, TRANSJET Classic (manufactured by Cham Paper).

After that, the surface of the intermediate transfer medium on which the ink jet ink composition is adhered is brought into close contact with a fabric (100% polyester, Amina, manufactured by Toray Industries, Inc.), which is a white recording medium. (manufactured by Taiyo Seiki Co., Ltd.) under the condition of 200° C. for 60 seconds to perform sublimation transfer to obtain prints of each example.

In addition, printed matters using the inkjet ink compositions of Comparative Examples 6-1 and 6-2 were printed on an intermediate transfer medium using the inkjet ink composition of Comparative Example 6-1 and the inkjet ink of Comparative Example 6-2. The compositions were each filled into separate rows of the head and ejected at a ratio of 1:1 for each color so that the total amount of ink in the two rows was the same as in the other examples at the same locations. Other than that, a printed matter was obtained in the same manner as in the other examples.

3.3. Evaluation Tests The following evaluation tests were performed on the obtained transcripts.

3.3.1. Evaluation of light resistance Light resistance was evaluated by using a xenon laser meter XL-75 (manufactured by Suga Test Instruments Co., Ltd.) to irradiate the printed material with an illuminance of 70,000 lux under the conditions of 24 ° C. and a relative humidity of 60% RH. I went there for 7 days. Evaluation was carried out by measuring the reduction rate (%) of the OD of the printed fabric before and after the evaluation. Then, evaluation was performed according to the following evaluation criteria, and the results are shown in Table 1.
(Evaluation criteria)
By evaluating light resistance, the rate of decrease in OD value is
A: 50% or less B: More than 50% and 80% or less C: Decreased by more than 80%

3.3.2. Evaluation of Aggregation Unevenness The printed matter of each example was visually observed and evaluated according to the following evaluation criteria.
(Evaluation criteria)
A: Aggregation unevenness is not observed C: Aggregation unevenness is observed

3.4. Evaluation Results As a yellow dye, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. The inkjet ink composition of each example containing one or more selected from Disperse Yellow 82, a compound represented by formula (I) as a blue dye, an organic solvent, and water has good light resistance. Met. In addition, from the results of Comparative Examples 6-1 and 6-2, the yellow dye and the blue dye were mixed in advance compared to the case where the ink containing only the yellow dye and the ink containing only the blue dye were separately discharged and printed. It was found that when printing was performed by ejecting only the ink of each example corresponding to the ink (for example, Example 1), uneven aggregation hardly occurred.

The embodiments and modifications described above are examples, and the present invention is not limited to these. For example, it is also possible to appropriately combine each embodiment and each modification.

The present invention includes configurations that are substantially the same as the configurations described in the embodiments, for example, configurations that have the same function, method and result, or configurations that have the same purpose and effect. Moreover, the present invention includes configurations obtained by replacing non-essential portions of the configurations described in the embodiments. In addition, the present invention includes a configuration that achieves the same effects or achieves the same purpose as the configurations described in the embodiments. In addition, the present invention includes configurations obtained by adding known techniques to the configurations described in the embodiments.

The following content is derived from the embodiment and modification described above.

（式（Ｉ）中、Ｒは、水素原子又は炭素数１以上１８以下のアルキル基を表し、前記アルキル基は分岐していてもよい。Ｘは、酸素原子又はイミノ基を表す。） The inkjet ink composition is
As a yellow dye, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. one or more selected from Disperse Yellow 82;
As a blue dye, a compound represented by the following formula (I),
an organic solvent;
water and,
including.

(In Formula (I), R represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and the alkyl group may be branched. X represents an oxygen atom or an imino group.)

According to this inkjet ink composition, an image having good lightfastness can be formed. In addition, by including a yellow dye and a blue dye, an image in which uneven aggregation is suppressed can be formed.

In the inkjet ink composition,
The content of the yellow dye may be 0.2% by mass or more and 15.0% by mass or less with respect to the entire inkjet ink composition.

According to this inkjet ink composition, an image having sufficient color development properties can be formed.

In the inkjet ink composition,
A content of the blue dye may be 0.2% by mass or more and 15.0% by mass or less with respect to the entire inkjet ink composition.

According to this inkjet ink composition, an image having sufficient color development properties can be formed.

In the inkjet ink composition,
A ratio (Y:B) of the content (Y) of the yellow dye and the content (B) of the blue dye may be 1:3 to 3:1.

According to this inkjet ink composition, it is possible to form an image having good lightfastness and a hue closer to green.

In the inkjet ink composition,
May not contain red dye.

According to this inkjet ink composition, it is possible to form a highly saturated image that is not so-called composite black.

In the inkjet ink composition,
The content of the organic solvent may be 5.0% by mass or more and 50.0% by mass or less with respect to the entire inkjet ink composition.

According to this inkjet ink composition, it is easy to adjust the viscosity to be more suitable for the inkjet method, and the clogging of ejection nozzles due to the moisturizing effect can be reduced.

In the inkjet ink composition,
The water content may be 40.0% by mass or more and 90.0% by mass or less with respect to the entire inkjet ink composition.

According to this inkjet ink composition, it is easy to adjust the viscosity to be suitable for the inkjet method.

The method of manufacturing the printed matter is
Any of the inkjet ink compositions described above is adhered to the recording surface of a transfer paper by an inkjet method, and the recording surface and the recording medium are opposed to each other and heated to perform thermal transfer.

According to this method for producing a printed matter, it is possible to produce a printed matter on which an image having good light fastness is formed.

Claims (8)

As a yellow dye, C.I. I. Disperse Yellow 54, C.I. I. Solvent Yellow 160:1, C.I. I. one or more selected from Disperse Yellow 82;
As a blue dye, a compound represented by the following formula (I),
an organic solvent;
water and,
An inkjet ink composition comprising:

(In Formula (I), R represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and the alkyl group may be branched. X represents an oxygen atom or an imino group.) In claim 1,
The inkjet ink composition, wherein the content of the yellow dye is 0.2% by mass or more and 15.0% by mass or less with respect to the entire inkjet ink composition. In claim 1 or claim 2,
The inkjet ink composition, wherein the content of the blue dye is 0.2% by mass or more and 15.0% by mass or less with respect to the entire inkjet ink composition. In any one of claims 1 to 3,
The inkjet ink composition, wherein the ratio (Y:B) of the content (Y) of the yellow dye and the content (B) of the blue dye is 1:3 to 3:1. In any one of claims 1 to 4,
An inkjet ink composition that does not contain a red dye. In any one of claims 1 to 5,
The inkjet ink composition, wherein the content of the organic solvent is 5.0% by mass or more and 50.0% by mass or less with respect to the entire inkjet ink composition. In any one of claims 1 to 6,
The inkjet ink composition, wherein the water content is 40.0% by mass or more and 90.0% by mass or less with respect to the entire inkjet ink composition. The inkjet ink composition according to any one of claims 1 to 7 is adhered to the recording surface of transfer paper by an inkjet method, and the recording surface and the recording medium are opposed to each other and heated to perform thermal transfer. A method for producing a printed matter, comprising: