CN-121991528-A - Dye composition, method for producing dye composition, inkjet ink composition, and method for producing recorded matter

Abstract

The purpose of the present disclosure is to provide a dye composition that has good ejection stability and storage stability at high temperatures, a method for producing the dye composition, an inkjet ink composition, and a method for producing a recorded matter. A dye composition comprising a water-insoluble dye, a specific dispersant for dispersing the water-insoluble dye, an alkylene oxide adduct of (poly) glycerin comprising a copolymer of a styrene compound and maleic acid or a urethane resin, and water, wherein the alkylene oxide adduct of (poly) glycerin comprises a propylene oxide group, the ratio (B/A) of the content B of the specific dispersant to the content A of the water-insoluble dye is 0.40 to 0.75, and the content of the alkylene oxide adduct of (poly) glycerin is 0.05 to 1.00 mass% relative to the total amount of the dye composition.

Inventors

• ASAKAWA YUTA

Assignees

• 精工爱普生株式会社

Dates

Publication Date

20260508

Application Date

20251029

Priority Date

20241101

Claims (9)

1. 1. A dye composition comprising a water-insoluble dye, a specific dispersant for dispersing the water-insoluble dye, an alkylene oxide adduct of (poly) glycerol and water, The specific dispersant comprises a copolymer of a styrene compound and maleic acid or a urethane resin, The alkylene oxide adduct of (poly) glycerol comprises an oxypropylene group, The ratio B/A of the content B of the specific dispersant to the content A of the water-insoluble dye is 0.40-0.75, The content of the alkylene oxide adduct of (poly) glycerin is 0.05 to 1.00 mass% relative to the total amount of the dye composition.
2. 2. The dye composition according to claim 1, wherein, The alkylene oxide adduct of (poly) glycerin comprises a compound represented by the following formula (1), In the formula (1), a plurality of A's are each independently a 1-valent (poly) alkylene oxide group or a hydrogen atom represented by the following formula (2), at least 1 or more of a plurality of A's are 1-valent (poly) alkylene oxide groups, and n is a natural number, In the formula (2), m is a natural number of 2 to 4, l is a natural number of 1 to 30, m in a plurality of A's may be different from each other, and l in a plurality of A's may be different from each other.
3. 3. The dye composition according to claim 1, wherein, The water-insoluble dye includes a disperse dye having a molecular weight of 500 or less or a solvent dye having a molecular weight of 500 or less.
4. 4. The dye composition according to claim 1, wherein, The average addition mole number of the propylene oxide groups in the alkylene oxide adduct of (poly) glycerin is 9 mole or less.
5. 5. The dye composition according to claim 1, wherein, Also comprises a specific defoamer comprising an acetylenic diol-based defoamer and/or a silicone-based defoamer, The content of the specific antifoaming agent is 0.10 mass% or less with respect to the total amount of the dye composition.
6. 6. A process for producing a dye composition according to claim 1, Comprises a dispersion step of dispersing a water-insoluble dye in water by mixing the water-insoluble dye, a specific dispersant for dispersing the water-insoluble dye, an alkylene oxide adduct of (poly) glycerol, and water.
7. 7. An ink-jet ink composition comprising a substrate, A dye composition comprising the dye composition of claim 1.
8. 8. The inkjet ink composition of claim 7, wherein, Comprises an organosilicon surfactant.
9. 9. A method for producing a recorded matter, comprising: An inkjet recording step of ejecting the inkjet ink composition according to claim 7 from an inkjet head to adhere the inkjet ink composition to an intermediate recording medium; A dye-attaching step of superposing a recording surface of the intermediate recording medium on a dye to obtain a laminate, heating the laminate at 150 to 220 ℃ to sublimate and attach a water-insoluble dye contained in the inkjet ink composition to the dye, and And a recorded matter acquisition step of removing the intermediate recording medium from the laminate after the dye adhering step, to obtain a recorded matter as the dyed matter on which the water-insoluble dye is adhered.

Description

Dye composition, method for producing dye composition, inkjet ink composition, and method for producing recorded matter Technical Field The present invention relates to a dye composition, a method for producing the dye composition, an inkjet ink composition, and a method for producing a recorded matter. Background The inkjet recording method can record a high-definition image with a relatively simple apparatus, and has been rapidly developed in various aspects. Among them, various studies have been made on storage stability and the like. For example, patent document 1 discloses an ink composition containing a lactone-structured organic acid, a colorant, a styrene- (meth) acrylic acid copolymer, or diglycerol. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2018-150400. However, from the viewpoint of improving printing accuracy, the inkjet ink composition is preferably stably ejected from the inkjet head. In addition, since the inkjet ink composition is stored at a high temperature depending on the environment in which the inkjet printer is installed, it is preferable that the inkjet ink composition does not change in properties even at a high temperature. That is, the inkjet ink composition preferably has good ejection stability and storage stability at high temperatures. Disclosure of Invention The present invention provides a dye composition comprising a water-insoluble dye, a specific dispersant for dispersing the water-insoluble dye, an alkylene oxide adduct of (poly) glycerol comprising a copolymer of a styrene compound and maleic acid or a urethane resin, and water, wherein the alkylene oxide adduct of (poly) glycerol comprises a propylene oxide group (propylene oxide group), the ratio (B/A) of the content B of the specific dispersant to the content A of the water-insoluble dye is 0.40 to 0.75, and the content of the alkylene oxide adduct of (poly) glycerol is 0.05 to 1.00 mass% relative to the total amount of the dye composition. Drawings Fig. 1 is a schematic diagram of a recording apparatus used in the present embodiment. Fig. 2 is a table showing the results of the examples. Fig. 3 is a table showing the results of the examples. Symbol description 20 Serial printer, 220 conveying unit, 230 recording unit, 231 ink jet head, 234 carriage, 235 carriage moving mechanism, F recording medium, S1, S2 main scanning direction, T1, T2 sub scanning direction. Detailed Description Hereinafter, embodiments of the present invention (hereinafter, referred to as "present embodiments") will be described in detail, but the present invention is not limited thereto, and various modifications may be made without departing from the spirit thereof. 1. Dye composition The dye composition of the present embodiment comprises a water-insoluble dye, a specific dispersant for dispersing the water-insoluble dye, an alkylene oxide adduct of (poly) glycerin containing a copolymer of a styrene compound and maleic acid or a urethane resin, and water, wherein the alkylene oxide adduct of (poly) glycerin contains an alkylene oxide group, the ratio (B/A) of the content B of the specific dispersant to the content A of the water-insoluble dye is 0.40 to 0.75, and the content of the alkylene oxide adduct of (poly) glycerin is 0.05 to 1.00 mass% relative to the total amount of the dye composition. In the case of producing an aqueous ink by dispersing a water-insoluble dye in water, a dispersant for dispersing a water-insoluble dye in water is generally used. However, since a water-insoluble dye dispersed by a dispersant (hereinafter, also referred to as "water-insoluble dye dispersion") is easily dissolved in an organic solvent or a surfactant which can be contained in an aqueous ink particularly in a high-temperature environment, there is room for improvement in storage stability at high temperature of the aqueous ink having the water-insoluble dye dispersion. In addition, since the water-insoluble dye dispersion has a large specific surface area, if bubbles are mixed in the aqueous ink having the water-insoluble dye dispersion, the ejection stability of the ink is easily deteriorated. In order to prevent the water-based ink having the water-insoluble dye dispersion from sticking to the nozzle from which the ink is ejected, it is preferable that the ink be easily redissolved in a solvent after curing. In this regard, the dye composition of the present embodiment can exhibit excellent storage stability even at high temperatures by using a specific dispersant comprising a copolymer of a styrene compound and maleic acid or a urethane resin in combination with an alkylene oxide adduct of (poly) glycerol. Since the dye composition is excellent in storage stability at high temperature, the ink jet ink composition containing the dye composition is also excellent in storage stability at high temperature. In addition, the use of an alkylene oxide adduct of a specific dispersant and (poly) glycer