KR102226499B1 - An ink composition comprising an encapsulated pigment dispersion and a method for preparing the same - Google Patents

Abstract

The present invention relates to an ink composition comprising an encapsulated pigment dispersion and a method of manufacturing the same. Specifically, the present invention (a) encapsulation pigment; (b) binder resin; And (c) an ink composition comprising an organic solvent, and (a) dispersing the pigment with a dispersant, and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And (b) mixing an encapsulated pigment dispersion, a binder resin, and an organic solvent to prepare an ink composition. The ink composition according to the present invention ensures excellent fastness and long-term output stability when printing according to a digital textile printing method.

Description

An ink composition containing an encapsulated pigment dispersion and a method for manufacturing the same TECHNICAL FIELD [AN INK COMPOSITION COMPRISING AN ENCAPSULATED PIGMENT DISPERSION AND A METHOD FOR PREPARING THE SAME}

The present invention relates to an ink composition comprising an encapsulated pigment dispersion and a method of manufacturing the same. Specifically, the present invention (a) encapsulated pigment dispersion; (b) binder resin; And (c) an ink composition comprising an organic solvent, and (a) dispersing the pigment with a dispersant, and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And (b) mixing an encapsulated pigment dispersion, a binder resin, and an organic solvent to prepare an ink composition.

Compared to traditional textile printing methods such as screen printing, digital textile printing (hereinafter, referred to as DTP) printing method has a great advantage of being able to easily implement multicolor images on media using computer software such as RIP. In particular, it has the advantages of small number of manpower required for printing, unrestricted installation space, small amount of wastewater generation, low operating cost, and small quantity production of multiple varieties, and its importance is emerging.

Colorants used in printing include dyes, pigments, disperse dyes, reactive or acid dyes. Among these, pigment printing is economically advantageous because it is not restricted to the type of fabric compared to dyes or other colorants, and the cost of water and energy required for the fixing or washing process is low.

However, compared to other colorants, in order to use pigments in textile materials, the fastness must be improved. In particular, the stability of the ink composition is guaranteed to be applied to DTP printing using an inkjet head in which droplets are discharged through nozzles of tens of micro units. Only then can you secure productivity through long-term discharging capacity.

The pigment can be homogeneously dispersed in the medium by using a dispersant, but if the combination of the pigment and the dispersant does not match, particle agglomeration is caused, and the stability of the dispersion is deteriorated. In addition, the water-soluble organic solvent used to prevent clogging of the head due to drying after forming the film of the binder causes the dispersant to be desorbed as the amount used increases, resulting in particle agglomeration.

Research on ink compositions for solving these problems is continuing. For example, Japanese Laid-Open Patent Publication No. 2008-95089 discloses an ink composition containing a surface-treated carbon black pigment, an acrylic-silicone resin emulsion, diethylene glycol, glycerin, water, and the like. However, this has a problem that stability is not maintained for a long period of time.

Accordingly, the present inventors aim to provide an ink composition capable of stably printing for a long period of time during DTP printing by inventing a pigment ink having high dispersion stability and solvent resistance, which can solve the above-described problems.

JP 2008-95089 A

An object of the present invention is (a) an encapsulated pigment dispersion; (b) binder resin; And (c) an organic solvent.

Another object of the present invention is (a) dispersing a pigment with a dispersant, and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And (b) mixing an encapsulated pigment dispersion, a binder resin, and an organic solvent to prepare an ink composition.

In order to achieve the above object, the present invention (a) an encapsulated pigment dispersion; (b) binder resin; And (c) an organic solvent.

The present invention also includes the steps of: (a) dispersing the pigment with a dispersant and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And (b) mixing an encapsulated pigment dispersion, a binder resin, and an organic solvent to prepare an ink composition.

In order to impart high storage stability and solvent resistance, the pigment ink composition for digital textile printing according to the present invention is confined inside the polymer by crosslinking the polymer dispersant used for the pigment with an encapsulating agent, thereby reducing the solubility of the water-soluble organic solvent. By suppressing the dispersant from being removed, various ink compositions are possible. This can reduce the limit on the content of the water-soluble organic solvent used to prevent clogging of the head due to the formation of a film of the binder and drying. In other words, since the amount of binder used can be increased, high fastness of printed materials after printing is guaranteed.

In addition, the pigment ink composition for digital textile printing according to the present invention improves productivity by ensuring long-term discharge performance to industrial or large-scale roll-to-roll equipment used in print shops or printing factories, and during long-term storage or delivery after ink production. The rate of change of physical properties is small even in an external exposure environment, indicating high stability.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by an expert skilled in the art to which the present invention belongs. In general, the nomenclature used in this specification is well known and commonly used in the art.

In one aspect of the present invention, (a) an encapsulated pigment dispersion; (b) binder resin; And (c) a water-soluble organic solvent.

In another aspect, the present invention comprises the steps of: (a) dispersing the pigment with a dispersant and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And (b) mixing an encapsulated pigment dispersion, a binder resin, and a water-soluble organic solvent to prepare an ink composition.

In the present invention, the encapsulated pigment dispersion may be characterized in that it is prepared by dispersing the pigment with a dispersant and then adding a crosslinking agent.

In the present invention, the dispersant is styrene, chloro styrene, vinyl toluene, 2-ethylhexyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, benzyl (meth) )Acrylate, glycidyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate,, 2-phenoxyethyl (meth)acrylate , Tetrahydrofurpril (meth)acrylate, hydroxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxy-3-chloro Propyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, diethylamino (meth)acrylate, ethylhexyl acrylate, 2-methoxyethyl (meth) )Acrylate, 3-methoxybutyl (meth)acrylate, butoxyethyl (meth)acrylate, ethoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth)acrylate, methoxytripropylene glycol (Meth)acrylate, methoxypolyethylene glycol (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, p-nonylphenoxypolyethylene glycol (meth)acrylate, p-nonylphenoxypolypropylene glycol (meth) Acrylate, tetrafluoropropyl (meth)acrylate, 1,1,1,3,3,3-hexafluoroisopropyl (meth)acrylate, methyl α-hydroxymethyl acrylate, ethyl α-hydroxy The group consisting of methyl acrylate, propyl α-hydroxymethyl acrylate, butyl α-hydroxymethyl acrylate, N-phenylmaleimide, N-(4-chlorophenyl)maleimide, meta acrylic acid, maleic acid, and itaconic acid It may be characterized in that produced by polymerizing at least one selected from.

In the present invention, the crosslinking agent may be characterized in that it comprises at least one reactive group selected from the group consisting of epoxy, isocyanate, carbodiimide, n-methylol, oxazoline, and silane.

In the present invention, the binder resin may be characterized in that the urethane-based binder resin.

In the present invention, the water-soluble organic solvent may be characterized in that at least one selected from the group consisting of 1,2-alkanediols, alcohols, glycol ethers, and pyrrolidones.

In the present invention, the ink composition may be characterized in that it further comprises at least one additive selected from the group consisting of a moisturizing agent, a surfactant, a curing accelerator, an adhesion accelerator, a filler, an antifoaming agent, a preservative and an anti-aggregation agent.

In the present invention, the moisturizing agent is ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol , 2-methyl-2,4-pentanediol, tripropylene glycol, polyethylene glycol with a number average molecular weight not exceeding 2000, 1,3-propylene glycol, isopropylene glycol, isobutylene glycol, glycerin, diglycerin and polyglycerin It may be characterized in that at least one selected from the group consisting of.

In the present invention, the surfactant may be characterized in that at least one selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, and fluorine surfactants.

In the present invention, the ink composition comprises 3 to 7% by mass of the pigment in the encapsulated pigment dispersion, 3 to 14% by mass of the binder resin, and 0.5 to 10% by mass of the water-soluble organic solvent with respect to 100% by mass of the total ink composition. You can do it.

In the present invention, the ink composition may be characterized in that it contains 10 to 35% by mass of a moisturizer based on 100% by mass of the total ink composition.

In the present invention, the ink composition may be characterized in that it contains 0.05 to 10% by mass of a surfactant based on 100% by mass of the total ink composition.

In the present invention, the ink composition may be characterized in that it is for digital textile printing.

In the present invention, the method for preparing the ink composition may include adding a crosslinking agent in step (a) and then reacting at a temperature of 30 to 80° C. to prepare an encapsulated pigment dispersion. At temperatures below 30 ℃, the reactivity is low, so the effect of encapsulation is small even when reacted for a long time, and the dispersion over time stability is not good due to the unreacted crosslinking agent, which is not preferable. At temperatures above 80 ℃, the high temperature stability of the dispersion is not secured. There is a problem in that the particle size increases during the encapsulation reaction, which is not preferable. In one embodiment, when the crosslinking agent included in the ink composition according to the present invention is a water-soluble epoxy crosslinking agent, in the method for preparing the ink composition, after adding the crosslinking agent in step (a), a temperature of 60 to 70°C In, characterized in that to prepare the encapsulated dispersion by reacting for 4 to 12 hours.

As used herein, the term "composition" is considered to include not only products containing specific ingredients, but also any products made directly or indirectly by the combination of specific ingredients.

Hereinafter, the components of the ink composition of the present invention and the process of the manufacturing method of the ink composition will be described in detail.

Pigment

The pigment used in the present invention is not particularly limited, and can be used among organic and inorganic pigments, and pigments of any color can be used. Pigments are basically insoluble and can be classified into a self-dispersing pigment dispersion in which a dispersing functional group is attached to the surface of the pigment through a special chemical reaction, and a polymer dispersion that is dispersed in a medium using a polymer dispersant. Organic pigments include coloring agents such as azo-based, phthalocyanine-based, dye-based, condensed polycyclic-based, quinacridone-based, nitro- and nitroso-based, black-based carbon black, lamp black, acetylene black and channel black, and inorganic Examples of the pigment include metals such as cobalt, iron, chromium, copper, zinc, lead, titanium, vanadium, manganese and nickel, and metal oxides and sulfides.

As a magenta pigment, for example, CI Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22 , 23, 30, 31, 32, 37, 38, 40, 41, 42, 48(Ca), 48(Mn), 57(Ca), 57:1, 88, 112, 114, 122, 123, 144, 146, 149, 150, 166, 168, 170, 171, 175, 176, 178, 179, 184, 185, 187, 202, 209, 219, 245, CI Pigment Violet 19, 23, 32, 33, 36, 38, 43, 50, etc.

As a yellow pigment, for example, CI Pigment Yellow 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 16, 17, 24, 34, 35, 37, 53, 55 , 65, 73, 74, 75, 81, 83, 93, 94, 95, 97, 98, 99, 108, 109, 110, 114, 117, 120, 124, 128, 129, 133, 138, 139, 147 , 151, 153, 154, 167, 172, 180, etc.

As a cyan pigment, for example, CI Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:34, 15:4, 16, 18, 22, 25, 60, 65 , 66, etc.

As pigments other than magenta, yellow, and cyan, for example, CI pigment green 7, 10, CI pigment brown 3, 5, 25, 26, CI pigment orange 1, 2, 5, 7, 13, 14, 15, 16, 24, 34, 36, 38, 40, 43, 63, etc.

As a black pigment as carbon black, for example, MCF88, No.2300, 2200 B, 900, 33, 40, 45, 52, MA7, 8, 100, etc. (the above brand name, Mitsubishi Chemical) Raven 5750, 5250, 5000, 3500, 1255, 700, etc.(above brand name, Colombia Carbon company) Rega1 400 R, 330 R, 660 R, Mogul L, Monarch 700, 800, 880, 900, 1000, 1100, 1300, 1400, etc. Cabot) Color Black FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex 35, U, V, 140 U, Special Black 6, 5, 4A, 4th (above brand name, Degood company), etc. There is this.

Since the ink composition according to the present invention is generally sprayed through a nozzle having a diameter of 10 to 50 μm, the average particle size of the pigment must be sufficiently small. In addition, the average particle size of the pigment greatly affects the stability and color development of the ink. The average particle size range of pigments that do not deteriorate the mentioned properties is usually about 0.005 to 15 μm. It should preferably have a particle size of 0.05 to 5 μm, more preferably an average particle size range of 100 to 200 nm as an inkjet pigment is suitable.

The content of the pigment in the ink composition according to the present invention is preferably 1 to 15% by mass, more preferably 3 to 7% by mass or less of the total ink composition (100% by mass), and one pigment alone or together with another pigment. Can be used.

Dispersant

The pigment dispersion used in the present invention refers to a pigment dispersed in a medium using a polymer dispersant. The polymeric dispersant generally has a weight average molecular weight in the range of 50,000 to 200,000 as measured by gel permeation chromatography, and more generally refers to a molecular weight of 10,000 to 40,000.

As the polymer dispersant used in the pigment dispersion, a (meth)acrylate and (meth)acrylic acid copolymer or a styrene-acrylic acid copolymer is preferable, and depending on the ratio of the monomer used during polymerization (i.e., hydrophobicity such as unsaturated acrylate) Hydrophilic monomers such as monomer, acrylic acid, or hydroxyacryl) By adjusting the ratio of hydrophilic-hydrophobic properties, the adsorption power with the pigment and the dispersing power in an aqueous or oily medium can be controlled. It can also increase the fixing properties and glossiness of the ink composition.

The dispersant used in the pigment dispersion may be a commercially available dispersant, for example, Joncyl 67 or Joncryl 693 from BASF, Zetasperse 2500 from Air Product, Zetasperse 3100, Zetasperse 3400, Zetasperse 3600, or Zetasperse 3700, DISPERBYK 194 from BYK , DISPERBYK 2012, DISPER 2014, or BYKJET 9170, Solsperse WV400 from Lubrizol, JEFFSPERSE X3204 or JEFFSPERSE X3503 from Huntsman, but are not limited thereto.

Monomers that can be used in the copolymerization for preparing the dispersant include, for example, styrene, chlorostyrene, vinyltoluene, 2-ethylhexyl (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl ( Meth)acrylate, benzyl (meth)acrylate, glycidyl (meth)acrylate, dimethylaminoethyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate,, 2- Phenoxyethyl (meth)acrylate, tetrahydrofurpril (meth)acrylate, hydroxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxy-3-chloropropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, diethylamino (meth)acrylate, ethylhexyl acrylate , 2-methoxyethyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, butoxyethyl (meth)acrylate, ethoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth) Acrylate, methoxytripropylene glycol (meth)acrylate, methoxypolyethylene glycol (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, p-nonylphenoxypolyethylene glycol (meth)acrylate, p-nonyl Phenoxypolypropylene glycol (meth)acrylate, tetrafluoropropyl (meth)acrylate, 1,1,1,3,3,3-hexafluoroisopropyl (meth)acrylate, methyl α-hydroxymethyl Acrylate, ethyl α-hydroxymethyl acrylate, propyl α-hydroxymethyl acrylate, butyl α-hydroxymethyl acrylate, N-phenylmaleimide, N-(4-chlorophenyl)maleimide, meta acrylic acid, Maleic acid or itaconic acid, and the like, but is not limited thereto.

Pigment dispersions dispersed with a polymeric dispersant can be prepared through phase-transfer emulsification. In particular, the above-mentioned polymer is dissolved in an organic solvent such as methanol, ethanol, isopropyl alcohol, n-butyl alcohol, acetone, methyl ethyl ketone or dibutyl ether to remove the solvent after pigment dispersion, or volatile organic salt or non-volatile organic It is used by dissolving in water using a salt. As a method used for milling and dispersing the pigment dispersion, for example, a ball mill, a roll mill, a bead mill, a high pressure homogenizer, or a high-speed stirrer may be used.

Volatile organic base compounds used to neutralize the aqueous polymer dispersant include, for example, mono (methyl, ethyl, propyl) amines, di (methyl, ethyl, propyl) amines of primary, secondary, and tertiary amines, Tri(methyl, ethyl, propyl) amine, N,N-dimethylcyclohexyl amine, N,N-dimethylstearyl amine, N,N-dimethylaniline, N-methylpiperazine, N,N-dimethylethanol amine, N ,N-diethylethanolamine, triethanolamine, N-methyldiethanolamine, dimethylaminopropanol, 2-methoxyethyldimethylamine, N-hydroxyethylpiperazine, 2-(2-dimethylaminoethoxy)-ethanol And 5-diethylamino-2-pentanone, 3-amino-1-propanol, N-ethylethanolamine, and ammonia, but are not limited thereto. In addition, the nonvolatile base compound includes, for example, an alkoxide, hydroxide, carbonate, or bicarbonate compound among lithium, sodium, and potassium monovalent alkali metals, but is not limited thereto.

Crosslinking agent

In the present invention, after dispersing the pigment with a dispersant, a crosslinking agent may be added to further prepare an encapsulated pigment dispersion. Dispersants as described above generally comprise a salt form of carboxylate, sulfonate, or phosphonate and a crosslinkable reactive group such as a hydroxy group.

Examples of the form of the crosslinking agent to be used include compounds consisting of groups such as epoxy, isocyanate, aziridine, carbodiimide, N-methylol, oxazoline, and silane. Examples of the epoxy crosslinking agent include glycerol polyglycidyl ether, PZ-33 as an example of the aziridine crosslinking agent, and Carbodilite V-10 as examples of the carbodiimide group crosslinking agent, but are not limited thereto.

In the present invention, the content of the crosslinking agent may be 0.25% or more and 3.5% or less, or 0.3% or more and 3% or less of the total ink composition to which the 15% pigment dispersion is added. When the content of the crosslinking agent is lower than this, there is no effect of improving the stability of the ink composition due to the encapsulation reaction, and when the content of the crosslinking agent is higher than this, the average particle size may increase and the stability over time may decrease.

Since the encapsulated pigment dispersion prepared by the above-described method reacts in the presence of a medium, a catalyst can be used. In general, in the case of isocyanate reaction, dibutyl-tin-dilaurate is mainly used, and in the case of carboxylate or other types of acids, an amine series may be used as a catalyst.

A method of encapsulating a pigment with a dispersant may be prepared by mixing a pigment dispersion and a crosslinking agent, adding heat or a catalyst, or adjusting the pH. After the encapsulation process, the pigment dispersion can be adjusted to pH, filtered to remove coarse particles, or purified through a purification process to remove and concentrate the unreacted crosslinking agent to obtain an encapsulated pigment dispersion having a desired physical property.

bookbinder

The ink composition provided in the present invention contains a resin emulsion such as urethane as a binder. The binder is used in addition to the dispersant to form a film after printing to improve the abrasion resistance of the printed material and the fixing performance of the ink. Binder resin emulsions can usually be used, for example, acrylic, styrene acrylic, fluorene, urethane, vinyl chloride, vinyl chloride-vinyl acetate copolymer, ethylene vinyl acetate, etc. Urethane-based binder resins are preferred in order to satisfy the fastness of pigments through flexibility and film properties.

The urethane resin emulsion used in the present invention refers to an emulsion that is self-dispersed in an aqueous phase using a monomer containing a hydrophilic functional group without using a surfactant during synthesis. This has an advantage in improving water resistance since there is no desorption of the surfactant due to moisture contact after printing.

Urethane resin emulsions are resin emulsions containing urethane bonds in a molecular structure. Among them, polyether-type urethane resins have ether bonds in the main chain, polyester-type urethane resins have ester bonds in the main chain, and polycarbonate-type urethane resins have carbonate bonds in the main chain.

In addition, the urethane resin emulsion has an acid value in the range of 10 to 100 mg KOH/g. More preferably, it has an acid value in the range of 15 to 50 mg KOH/g. A resin emulsion having an acid value of less than 100 mg KOH/g can preferably maintain the water resistance of the printed fabric. Resin emulsions with an acid value greater than 10 mg KOH/g have satisfactory storage stability of the ink, and have high color and fixation performance of ink printed on fabric.

The urethane resin emulsion prevents cracking or cracking of the image by increasing the abrasion resistance and flexibility of the printed material by binding the composition in the ink layer on the surface of the fabric after printing. Therefore, the preferred elongation at break is in the range of 200 to 500%, and the preferred modulus of elasticity is in the range of 20 to 400 MPa.

The urethane resin emulsion has a preferred average particle size in the range of 30 to 300 nm, more preferably 80 to 300 nm. In the above range of average particle size, the resin emulsion is uniformly dispersed in the ink composition. The low average particle size value of the resin emulsion preferably improves the abrasion resistance of the printed material and imparts optical properties due to its more specific surface area. In addition, the weight average molecular weight of the resin emulsion has a value of 2,000 to 200,000 g/mol. More preferably, it has a value of 5,000 to 100,000 g/mol.

In the present invention, the content of the crosslinking agent may be more than 0.25% by mass and less than 3.5% by mass, or 0.3% by mass or more and 3% by mass or less with respect to 100% by mass of the total ink composition containing the encapsulated pigment dispersion containing 5% by mass pigment. have. When the content of the crosslinking agent is lower than this, there is no effect of improving the stability of the ink composition due to the encapsulation reaction, and when the content of the crosslinking agent is higher than this, the average particle size may increase and the stability over time may decrease.

The binder resin used in the present invention can be used in the range of preferably 3 to 14% by mass (100% by mass) of the total ink composition. If the amount is less than 3% by mass, the color fastness cannot be guaranteed because the amount of the pigment covered is insufficient, and if it exceeds 14% by mass, stability and viscosity of the ink may increase, color development may decrease, and head clogging may be caused.

Surfactants

The ink composition according to the present invention may contain a surfactant. Ink compositions typically have a surface tension value of 20 mN/m to 70 mN/m. The surface tension of the ink is directly related to the shape of the droplet when the ink droplet is ejected from the nozzle. Therefore, in order to control the volume of Satelite or the ink droplet, it is necessary to adjust the surface tension according to the head standard. The surface tension of the ink composition provided by the present invention is 20 mN/m to 45 mN/m, more preferably 25 mN/m to 40 mN/m.

The surfactant preferably comprises at least one or more of ethoxylated acetylene diol, ethoxylated primary, secondary alcohol, polysiloxane, polyethylene oxide-polypropylene oxide block copolymer, and fluoro surfactant. Preferred surfactants are, for example, Surfynol 104, 104E, 104H, 104A, 104BC, 104DPM, 104PA, 104PG-50, 104S, 420, 440, 465, 485 (trade name, Air Products) among ethoxylated acetylline diol surfactants. Company), among ethoxylated primary alcohols (trade name, Neodol), among ethoxylated secondary alcohols (commercial name, Terzitol), Pluronic series among polyethylene oxide-polypropylene oxides (trade name, BASF), Among polysiloxane compounds, BYK-306, BYK-333, BYK-341, BYK-345, BYK-346, BYK-347 BYK-348 (trade name, BYK company), Zonyl FSH, FSN and Capstone FS- among fluorine-based surfactants 31 (commercial name, DuPont).

In order to control the surface tension, the surfactant may be used in the range of 0.05 to 10% by mass of the total ink composition (100% by mass), and preferably in the range of 0.05 to 3% by mass. More preferably, it can be used in the range of 0.05 to 1%. If less than 0.05% or more than 1% is used, it may be difficult to meet the desired surface tension of the ink, and thus it may be most preferably used in the range of 0.05 to 1%.

Moisturizer

The ink composition according to the present invention may include a moisturizing agent. The moisturizer can be used to prevent the cause of clogging of the head by preventing the ink from drying rapidly on the surface of the head when left for a long period of time after printing, and to control the viscosity of the ink. The preferred moisturizing agent has a boiling point not less than 180°C, more preferably not less than 200°C. Moisturizing agents in this range have satisfactory moisturizing performance and wettability of ink.

Examples of moisturizing agents with high boiling points include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3 -Hexanediol, 2-methyl-2,4-pentanediol, tripropylene glycol, polyethylene glycol with a number average molecular weight not exceeding 2000, 1,3-propylene glycol, isopropylene glycol, isobutylene glycol, glycerin, diglycerin, Polyglycerin and the like.

In addition, sugars can be used for moisturizing performance and viscosity control. Examples of monosaccharides and polysaccharides include glucose, mannose, fructose, ribose, xylose, arabinose, lactose, galactose, aldonic acid, grusicose, maltose, cellobiose, sucrose, trehalose, maltotriose, and other alginic acids. And salts thereof, cyclodextrins, celluloses, and the like.

The moisturizing agent used in the present invention can be used in the range of 10 to 40% by mass (100% by mass) of the total ink composition. More preferably, it can be used within 10 to 35% by mass. Since the ink viscosity needs to be adjusted in a specific range according to the specification of the head, the amount of ink used may be adjusted to meet the desired viscosity within the range.

Water-soluble organic solvent (head clogging prevention agent)

The water-soluble organic solvent used in the present invention is an organic solvent having solubility in water. A water-soluble organic solvent is an essential component in ink using a binder, and by using a water-soluble organic solvent, it is possible to prevent clogging of the head caused by film formation of the ink at the tip of the binder or the head nozzle. Water-soluble organic solvents have a solubility of 20% or more in water at 25°C and are selected from the group consisting of solvents such as linear, branched or cyclic alkane-1,2-diols, alcohols, glycol ethers, and pyrrolidones. It is preferable to use at least 1 type or 2 or more types.

Water-soluble organic solvents include, for example, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, tripropylene glycol monobutyl ether, tetra ethylene glycol monomethyl ether, tetraethylene glycol monobutyl ether, dipropylene glycol monomethel ether, tri Polyalkylene glycol monoalkyl ethers such as propylene glycol monomethyl ether; Polyalkylene glycol monoaryl ethers such as phenoxy triethylene glycol and styrenated phenyl polyethylene glycol; Polyalkylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, and tetraethylene glycol dimethyl ether; Alkylene diols, such as 1,2-propanediol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, and 1,2-octanediol; And cyclic amide organic solvents such as 2-pyrrolidone, N-methylpyrrolidone, and N-ethylpyrrolidone.

The content of the water-soluble organic solvent is preferably 0.1 to 20% by mass based on the total ink composition (100% by mass). More preferably, it is 0.5-10 mass%. If it is less than 0.1% by mass, the desired head clogging prevention property cannot be obtained, and if it is more than 20% by mass, the amount of ink penetrated into the fabric or media is excessive and color development is deteriorated.

Other additives

In addition to the moisturizing agents and surfactants described above to maintain stability, deterioration prevention, storage stability, etc. in the head of the ink composition provided by the present invention, curing accelerators, adhesion accelerators, fillers, defoaming agents, solubility aids, penetration control agents, viscosity modifiers, pH Other additives such as modifiers, antioxidants, preservatives, corrosion inhibitors, chelating agents, preservatives or anti-aggregation agents may be used.

How to form an image

The present invention relates to an image forming method and a method of printing and printing on fabric by inkjet. In particular, it can be used for industrial printers used in print shops and printing factories, or for roll-to-roll mass production equipment (also available for small equipment such as DTG).

In DTP, the ink composition is supplied by inkjet equipment. Inkjet equipment includes drop-on-demand inkjet equipment, and drop-on-demand inkjet equipment is equipped with a head that utilizes piezoelectric elements such as Abson heads. The droplets are ejected to form an image.

The ink composition provided by the present invention is applied to fabrics. Examples of fabrics used include natural fibers and synthetic fibers such as silk, cotton, wool, nylon, polyester, and rayon. Since pigments are printed and printed, specific materials are not classified.

Pretreatment process

To prevent bleeding of the fabric, a pretreatment process can be performed on the fabric with a pretreatment solution before printing the image. In the pretreatment process, a pretreatment solution containing a coagulant is applied to the fabric and dried. The application process may be performed by coating, padding, inkjet or spraying the pretreatment solution.

The flocculant can agglomerate the components in the ink composition containing the pigment, and in particular, agglomerates the binder to form an ink film on the fabric. Preferred flocculants are usually organic acids, cationic organic substances such as cationic surfactants, and polyvalent metal compounds.

Examples of polyvalent metal compounds include titanium compounds, chromium compounds, copper compounds, cobalt compounds, strontium compounds, barium compounds, iron compounds, aluminum compounds, calcium compounds, magnesium compounds, or salts thereof (polyvalent metal salts) Etc. Among these polyvalent metal compounds, those preferred from the viewpoint of efficient aggregation of pigments are, for example, aluminum compounds, magnesium compounds, calcium compounds, and more preferably calcium compounds and magnesium compounds. Makes it a calcium compound. More specifically, the above-mentioned polyvalent metal compounds, for example, calcium carbonate, chalk, kaolin, calcined clay, talc, calcium nitrate, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, aluminum Silicate, calcium silicate, magnesium silicate, synthetic silica, aluminum hydroxide, alumina, sericite, white carbon, saponite, calcium montrolonite, sodium montmorillonite, bentonite and acrylic plastic pigments, polyethylene, polyurea and other organic pigments There is. A preferred pretreatment is a solution of a polyvalent cation salt such as calcium chloride, calcium acetate or calcium acetate tetrahydrate. A 20 mass% calcium acetate tetrahydrate solution can be used effectively.

The pretreatment solution is about 0.2 to 7.5 g of polycationic salt/100 g of cloth, more preferably about 0.6 to about 6.0 g of polycationic salt/100 g of cloth, and more preferably about 0.75 to about 5.0 It is applied to the fabric with a fabric impregnation amount of g polycationic salt/100 g.

The fabric treated with the pretreatment is dried at 110 to 200℃ through heat treatment. More preferably, it can be treated at 120 ~ 180 ℃. Heating at a temperature in the range of 110~200℃ prevents the deterioration of the quality of the fabric and the quality of the components of the pretreatment agent such as polymer, and can be fixed to the fabric.

Fixing process

The fabric printed with the ink composition provided by the present invention may be additionally heat treated. This is called a sticking process. The heat treatment or fixing process removes moisture from the surface of the fabric used and thermally binds the polymer binder used to form a film to improve abrasion resistance.

Examples of the heat treatment or fixing process include hot press, atmospheric steam, and high pressure steam. Alternatively, any other thermal energy source can be used in the fixing process. For example, there is an infrared lamp. The heat treatment process or the fixing process can be performed at any temperature depending on the properties of the material in the ink composition. In general, the preferred range for blowing water is 150 to 200°C.

After the heat treatment process or the fixing process, the printed material can be washed with water and dried. In this case, a detergent or fabric softener may be used together.

[Example]

Hereinafter, the present invention will be described in more detail through examples. These examples are for illustrative purposes only, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not construed as being limited by these examples. Therefore, it will be said that the practical scope of the present invention is defined by the appended claims and their equivalents.

Example 1: Preparation of an ink composition containing an encapsulated pigment dispersion

1-1: Preparation of pigment dispersion

Black pigment (carbon black, CI Pigment Black 7, product name S160, manufactured by Dagussa) 30% by mass, a styrene-acrylic polymer dispersant neutralized with triethanol amine (Joncryl 693, Basf) 25% dispersant solution 30% by mass and water 40 It was mixed with mass %. The mixture was dispersed with a dyno-mill for 2 hours. The prepared dispersion was let-down to 15% by mass of solid based on a colorant, and then filtered to obtain a pigment dispersion (1) having a pH of 7.6 and an average particle size of 110 nm.

Using the same method as the preparation of the pigment dispersion, as shown in Table 1 below, pigments (carbon black, CI Pigment Blue 15:3, CI Pigment Red 122, and CI Pigment Yellow 74), dispersant, content ratio, etc. Alternatively, pigment dispersions (2) to (10) were prepared. In Table 1, the dispersant SA is a styrene-acrylic polymer dispersant (BASF), and SMA is a styrene maleic anhydride polymer dispersant (Air Product).

1-2: Preparation of encapsulated pigment dispersion

Pigment dispersion (1) (pigment 15% by mass) 0.52% by mass of glycerol polyglycidyl ether (Denacol EX-313, epoxy content 141, Nagase ChemteX) was added as an epoxy crosslinking agent to 99.48% by mass at room temperature, followed by stirring at 60°C. Reacted for 4 hours. The reacted dispersion was cooled to room temperature and then filtered to prepare an encapsulated pigment dispersion (1) with a pH of 7.7 and an average particle size of 115 nm.

Using the same method as the preparation of the encapsulated pigment dispersion, but as shown in Table 2 below, by varying the content of the glycerol polyglycidyl ether used as the pigment dispersion and crosslinking agent, the reaction temperature and time, etc., the encapsulated pigment dispersion ( 1-1) to (8) were prepared.

Although the pH of the encapsulated pigment dispersions increased after the encapsulation reaction, the pH was less than 9, and the variation of the average particles of the dispersion was not large.

The aging stability of the encapsulated pigment dispersion was confirmed by measuring the average particle size after storage at 60° C. for 4 weeks, and as a result, it was confirmed that all of the encapsulated pigment dispersions (1) to (8) had an average particle size that could be used as an inkjet pigment.

In addition, 0.3 mass% of an aziridine crosslinking agent (PZ-33, Polyaziridine LLC) was added to 99.7 mass% of pigment dispersion (1) (pigment 15 mass%) at room temperature, followed by stirring at 65°C for 8 hours.

The reacted dispersion was cooled to room temperature and then filtered to prepare an encapsulated pigment dispersion (9) with a pH of 7.8 and an average particle size of 118 nm.

Pigment dispersion (1) (pigment 15% by mass) 0.25% by mass of a crosslinking agent having a carbodiimide group (Carbodilite V-10, carbodiimide group content 410, Nisshinbo Chemical Inc.) was added to 99.75% by mass and stirred at room temperature, followed by stirring. It reacted at 75°C for 6 hours.

The reacted dispersion was cooled to room temperature and then filtered to prepare an encapsulated pigment dispersion (10) with a pH of 7.6 and an average particle size of 114 nm.

After storing the encapsulated pigment dispersions (9) and (10) at 60° C. for 4 weeks, the average particle size was 120 nm and 117 nm, showing excellent stability over time.

To evaluate the stability of the ink composition containing the prepared encapsulated pigment dispersion. As a representative example of the crosslinking agent, each dispersion (pigment 5% by mass) for evaluating the solvent resistance of the encapsulated pigment dispersions (1), (9) and (10) prepared by reaction with an epoxy, aziridine, carbodiimide crosslinking agent, Stability was evaluated after preparing ink compositions (1) Black to (4) Black by mixing 1,2-hexanediol (Camtros) 10% by mass, glycerin (LG Household & Health Care) 30% by mass, and water (balance). .

As can be seen from Table 3, the ink composition (1) containing the non-encapsulated pigment dispersion (1) has a very large change in the average particle size depending on the temperature, but the encapsulated pigment dispersion (1), (9), (10) ), the average particle size change was smaller than that of the ink composition (1), so the contents of all encapsulated pigment dispersions prepared by reaction with epoxy, aziridine, and carbodiimide crosslinking agents Productivity and temperature stability were excellent.

In order to check the stability of the encapsulated pigment dispersion according to the content of glycerol polyglycidyl ether, which is an epoxy crosslinking agent, encapsulated pigment dispersions (11) and (12) were prepared using the same method as the preparation of the encapsulated pigment dispersion (1) [ Table 4].

[Table 4] shows the results of checking the properties of the encapsulated pigment dispersion, stability over time, and stability of the ink composition (solvent resistance).

* Ink composition: dispersion (pigment 5% by mass), 1,2-hexanediol (camtrose) 10% by mass, glycerin (LG Household & Health Care) 30% by mass, and water (balance)

As a result, the stability (solvent resistance) of the ink composition comprising the encapsulated pigment dispersion 11 reacted with 0.25% by mass of glycerol polyglycidyl ether is similar to that of the non-encapsulated pigment dispersion 1, so that the ink by the encapsulation reaction It was confirmed that there was no effect of improving the stability of the composition.

In addition, the encapsulated pigment dispersion (12) reacted with 3.5% mass of glycerol polyglycityl ether obtained a result of lowering of physical properties (average particle size) and stability over time after the encapsulation reaction. This is because the water-soluble group of the dispersant imparting water dispersibility of the pigment greatly decreases due to the reaction with the epoxy group of the crosslinking agent, and as a result, the dispersion stability of the pigment decreases.

Therefore, the content of the crosslinking agent for improving physical properties, aging stability, and solvent resistance of the encapsulated pigment dispersion by the encapsulation reaction is preferably 0.3% or more and 3% or less compared to the total ink composition containing the 15% pigment dispersion.

1-3: Preparation of ink composition

Using a pigment dispersion or an encapsulated pigment dispersion, ink compositions (1) to (8) for digital textile printing were prepared in the composition as shown in Tables 5 and 6 below. That is, each pigment dispersion liquid or encapsulated pigment dispersion liquid was mixed with a binder resin, a water-soluble organic solvent, and the like to prepare each ink composition. The ink compositions using the encapsulated pigment dispersion are (1) to (4), and the ink compositions using the general pigment dispersion are (5) to (8). In addition, the physical properties of the prepared ink compositions (1) to (8) are shown in Tables 5 and 6 below [TAKELAC W-6110 (polyurethane, Mitsui Chemical); 1,2-hexanediol (camtrose); Glycerin (LG Household & Health Care); BYK-348 (polyether modified siloxane, BYK); BT550 (1,2-benzisothiazolin-3-one, CDI)].

Example 2: Evaluation of the properties of the ink composition

2-1: Evaluation of stability over time

Each of the prepared ink compositions was put into about 15 ml and 20 ml glass vials, sealed, and stored at room temperature, 60°C and 80°C. In order to measure the change in stability over time according to temperature, samples were collected by day, and changes in average particle size, viscosity, and pH were measured under room temperature conditions, respectively.

The average particle size was listed by measuring the average value of three times (1 minute per measurement) using the dynamic light scattering method of Microtrac's Nanotrac™ 250 equipment, and the viscosity is BROOKFEILD's LVDV-II B-type. It was measured using a viscometer (CPE-40 spindle standard), and the pH was measured using TOA's portable HM-20P pH METER, and is shown in Tables 7 and 8 below.

As a result, as can be seen in Tables 7 and 8, the average particle size, viscosity, and pH of the ink compositions (1) to (8) using a general pigment dispersion or an encapsulated pigment dispersion did not change significantly even when stored for a long period under high temperature conditions.

2-2: Evaluation of ink solvent resistance

In order to evaluate the improved performance of the encapsulated dispersion, the stability of the ink with increased solvent amount was evaluated. The ink composition table is shown in Tables 9 and 10 below.

The inks prepared in Tables 9 and 10 were evaluated for aging stability in the same manner as in the method of Example 2-1, and are shown in Tables 11 and 12.

Ink composition using the general dispersion of Table 12 (6) The rest of the inks except CYAN had a large increase in particle size and viscosity when stored at 60°C, and stability of all inks was destroyed at 80°C. However, in the ink composition using the encapsulated dispersion of Table 11, there is no significant change in stability over time up to 60°C, and only MAGENTA has a change in physical properties at 80°C. Therefore, it can be seen that the encapsulation method of the present invention has a great influence on the stability of the pigment ink.

2-3: Ink long-term printability evaluation

Ink compositions (1) to (8) were respectively filled into cartridges of industrial print VJ01924 (MUTOH) equipped with Abson head DX7. The output condition was a single color, and the width of the fabric was 1400 cm at a resolution of 360X720 and 4 passes. In order to check the long-term discharging capacity of each ink, nozzles were checked every 10m printing without auto-cleaning and output to the maximum output distance to check for nozzle clogging. The evaluation criteria for each output are as follows.

◎: Nozzle clogged 0-1

○: 2-3 clogged nozzles

△: Nozzle clogged 4-5 pieces

▲: 6-7 clogged nozzles

Therefore, the content of the crosslinking agent for improving the physical properties, aging stability and solvent resistance of the encapsulated pigment dispersion by the encapsulation reaction is 0.3% by mass or more and 3% by mass with respect to 100% by mass of the total ink composition containing the encapsulated pigment dispersion containing 5% by mass pigment. % Or less is suitable.

As can be seen from Table 13, the ink compositions (1), (2), (3), and (4) containing the present encapsulated pigment dispersion have excellent nozzle clogging levels of 0-1 or less when output under the above conditions. On the other hand, ink compositions (6), (7), and (8) among the ink compositions prepared with general dispersions have more nozzle clogging times than this, and have long-term dispensing capacity compared to the case of using the encapsulated pigment dispersion. It was confirmed to fall.

2-4: fastness evaluation

Ink compositions (1) to (8) were respectively filled and printed in a cartridge of an industrial print VJ-1924 (MUTOH) equipped with an Abson head DX7. The printing condition was printed in a single color with a resolution of 720X720 in 4 passes, and the fabric was printed on a roll-type CM40's plain woven cotton fabric, hot-pressed at 180°C for 3 minutes, and then cut the printed material according to the evaluation standard to evaluate the fastness. Proceeded.

For the manufactured printed matter, an experiment was conducted in accordance with KSK ISO 105-X06: 2014 (A1S method), and the level of discoloration and contamination was determined according to the standard gray color table, and grades from 1st to 5th grade were judged. The first grade has the most fading, and the closer to grade 5, the less fading.

In addition, the manufactured printed matter was evaluated in accordance with KSK ISO 105-X12: 2016 (Crocimeter method), and the degree of contamination was determined by the standard gray color table and marked from Grade 1 to Grade 5, with Grade 5 being the most excellent. will be.

As a result, as can be seen from Table 14, the ink compositions (1) to (4) in which the encapsulated pigment dispersion is used tend to have improved light fastness and friction fastness compared to the ink compositions (5) to (8) in which the general pigment dispersion is used. Was shown, and the better grade was judged for the dirt (cotton) item of the washing fastness. Therefore, when the pigment dispersion is encapsulated, excellent fastness and high stability of the ink composition can be expected.

As described above, specific parts of the present invention have been described in detail, and it is obvious that these specific techniques are only preferred embodiments for those of ordinary skill in the art, and the scope of the present invention is not limited thereby. something to do. Accordingly, it will be said that the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims (27)

(a) an encapsulated pigment dispersion;
(b) binder resin; And
(c) an ink composition containing a water-soluble organic solvent,
The encapsulated pigment dispersion is prepared by dispersing the pigment with a dispersant and then adding a crosslinking agent,
The ink composition contains 3 to 7% by mass of the pigment in the encapsulated pigment dispersion, 3 to 14% by mass of the binder resin, and 0.5 to 10% by mass of the water-soluble organic solvent, based on 100% by mass of the total ink composition,
The ink composition contains 0.05 to 1 mass% of a surfactant based on 100 mass% of the total ink composition,
The ink composition contains 0.3 to 3 mass% of a crosslinking agent with respect to 100 mass% of the total ink composition containing the encapsulated pigment dispersion containing 5 mass% pigment,
The ink composition, characterized in that for digital textile printing, ink composition. delete The method of claim 1,
The dispersant is styrene, chloro styrene, vinyl toluene, 2-ethylhexyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, benzyl (meth) acrylate, glycine. Cydyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate,, 2-phenoxyethyl (meth) acrylate, tetrahydrofurpril (Meth)acrylate, hydroxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxy-3-chloropropyl (meth)acrylic Rate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, diethylamino (meth)acrylate, ethylhexyl acrylate, 2-methoxyethyl (meth)acrylate, 3 -Methoxybutyl (meth)acrylate, butoxyethyl (meth)acrylate, ethoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth)acrylate, methoxytripropylene glycol (meth)acrylate , Methoxy polyethylene glycol (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, p-nonylphenoxypolyethylene glycol (meth)acrylate, p-nonylphenoxypolypropylene glycol (meth)acrylate, tetrafluoro Lopropyl (meth)acrylate, 1,1,1,3,3,3-hexafluoroisopropyl (meth)acrylate, methyl α-hydroxymethyl acrylate, ethyl α-hydroxymethyl acrylate, propyl α-hydroxymethyl acrylate, butyl α-hydroxymethyl acrylate, N-phenylmaleimide, N-(4-chlorophenyl)maleimide, methacrylic acid, maleic acid, and at least one selected from the group consisting of itaconic acid Characterized in that produced by polymerization, ink composition.
The method of claim 1,
The crosslinking agent, characterized in that it comprises at least one reactive group selected from the group consisting of epoxy, isocyanate, carbodiimide, n-methylol, oxazoline and silane, ink composition.
The method of claim 1,
The ink composition, characterized in that the binder resin is a urethane-based binder resin.
The method of claim 1,
The water-soluble organic solvent, characterized in that at least one selected from the group consisting of 1,2-alkanediols, alcohols, glycol ethers, and pyrrolidones. The method of claim 1,
The ink composition is one selected from the group consisting of a moisturizing agent, a curing accelerator, an adhesion promoter, a filler, an antifoaming agent, a dissolution aid, a penetration control agent, a viscosity control agent, a pH control agent, an antioxidant, a preservative, a corrosion inhibitor, a chelating agent, a preservative, and an anti-aggregation agent. An ink composition, characterized in that it further comprises the above additives.
The method of claim 7,
The moisturizing agent is ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol, 2-methyl- 2,4-pentanediol, tripropylene glycol, polyethylene glycol with a number average molecular weight not exceeding 2000, 1,3-propylene glycol, isopropylene glycol, isobutylene glycol, glycerin, diglycerin and one selected from the group consisting of polyglycerin The ink composition, characterized in that the above. The method of claim 1,
The surfactant is characterized in that at least one selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, and fluorine surfactants.
delete The method of claim 7,
The ink composition, wherein the ink composition comprises 10 to 35% by mass of a moisturizer based on 100% by mass of the total ink composition. delete delete delete (a) dispersing the pigment with a dispersant and then adding a crosslinking agent to prepare an encapsulated pigment dispersion; And
(b) mixing an encapsulated pigment dispersion, a binder resin, and a water-soluble organic solvent to prepare an ink composition, comprising:
The ink composition contains 3 to 7% by mass of the pigment in the encapsulated pigment dispersion, 3 to 14% by mass of the binder resin, and 0.5 to 10% by mass of the water-soluble organic solvent, based on 100% by mass of the total ink composition,
The ink composition contains 0.05 to 1% by mass of a surfactant based on 100% by mass of the total ink composition,
The ink composition contains 0.3 to 3 mass% of a crosslinking agent with respect to 100 mass% of the total ink composition containing the encapsulated pigment dispersion containing 5 mass% pigment,
The ink composition is characterized in that for digital textile printing, the method of manufacturing an ink composition.
The method of claim 15,
The dispersant is styrene, chloro styrene, vinyl toluene, 2-ethylhexyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, benzyl (meth) acrylate, glycine. Cydyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate,, 2-phenoxyethyl (meth) acrylate, tetrahydrofurpril (Meth)acrylate, hydroxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxy-3-chloropropyl (meth)acrylic Rate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, diethylamino (meth)acrylate, ethylhexyl acrylate, 2-methoxyethyl (meth)acrylate, 3 -Methoxybutyl (meth)acrylate, butoxyethyl (meth)acrylate, ethoxydiethylene glycol (meth)acrylate, methoxytriethylene glycol (meth)acrylate, methoxytripropylene glycol (meth)acrylate , Methoxy polyethylene glycol (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, p-nonylphenoxypolyethylene glycol (meth)acrylate, p-nonylphenoxypolypropylene glycol (meth)acrylate, tetrafluoro Lopropyl (meth)acrylate, 1,1,1,3,3,3-hexafluoroisopropyl (meth)acrylate, methyl α-hydroxymethyl acrylate, ethyl α-hydroxymethyl acrylate, propyl α-hydroxymethyl acrylate, butyl α-hydroxymethyl acrylate, N-phenylmaleimide, N-(4-chlorophenyl)maleimide, methacrylic acid, maleic acid, and at least one selected from the group consisting of itaconic acid A method for producing an ink composition, characterized in that produced by polymerization. The method of claim 15,
The crosslinking agent comprises one or more reactors selected from the group consisting of epoxy, isocyanate, carbodiimide, n-methylol, oxazoline, and silane. The method of claim 15,
The method of manufacturing an ink composition, characterized in that the binder resin is a urethane-based binder resin. The method of claim 15,
The water-soluble organic solvent is at least one selected from the group consisting of 1,2-alkanediols, alcohols, glycol ethers, and pyrrolidones. The method of claim 15,
In the (b) step, in the group consisting of a moisturizing agent, a curing accelerator, an adhesion promoter, a filler, an antifoaming agent, a solubility aid, a penetration control agent, a viscosity control agent, a pH control agent, an antioxidant, a preservative, a corrosion inhibitor, a chelating agent, a preservative, and an anti-aggregation agent. A method for producing an ink composition, characterized in that one or more selected additives are further added.
The method of claim 20,
The moisturizing agent is ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, pentamethylene glycol, trimethylene glycol, 2-butene-1,4-diol, 2-ethyl-1,3-hexanediol, 2-methyl- 2,4-pentanediol, tripropylene glycol, polyethylene glycol with a number average molecular weight not exceeding 2000, 1,3-propylene glycol, isopropylene glycol, isobutylene glycol, glycerin, diglycerin and one selected from the group consisting of polyglycerin It characterized in that the above, the manufacturing method of the ink composition. The method of claim 15,
The surfactant is characterized in that at least one selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, and fluorine surfactants.
delete The method of claim 20,
The method for producing an ink composition, characterized in that the moisturizing agent is added in an amount of 10 to 35% by mass, based on 100% by mass of the total ink composition. delete delete The method of claim 15,
In the step (a), after adding a crosslinking agent, it is reacted at a temperature of 30 to 80° C. to prepare an encapsulated pigment dispersion.