阅读说明：本技术 分散组合物、分散体和墨组合物及其制备方法 (Dispersion composition, dispersion and ink composition and method for producing the same ) 是由 西川知志 于 2019-08-29 设计创作，主要内容包括：本发明为分散组合物、分散体和墨组合物及其制备方法。提供了分散组合物,其含有：(A)85至99.89重量％的分散剂(除了以下(B)和(C)以外)；(B)0.01至5重量％的炔属二醇和/或炔属二醇乙氧基化物；和(C)0.1至10重量％的选自聚氧(亚乙基-亚丙基)嵌段聚合物的一种或两种或更多种类型,所述嵌段聚合物具有1,500至20,000的重均分子量、20至90重量％的氧化乙烯含量和10至80重量％的氧化丙烯含量。还提供了使用它们的分散体和墨组合物以及生产它们的方法。(The invention provides dispersion compositions, dispersions and ink compositions and methods of making the same. There is provided a dispersion composition comprising: (A)85 to 99.89 wt% of a dispersant (except for the following (B) and (C)); (B)0.01 to 5% by weight of an acetylenic diol and/or an acetylenic diol ethoxylate; and (C)0.1 to 10% by weight of one or two or more types selected from the group consisting of poly oxy (ethylene-propylene) block polymers having a weight average molecular weight of 1,500 to 20,000, an ethylene oxide content of 20 to 90% by weight, and a propylene oxide content of 10 to 80% by weight. Also provided are dispersions and ink compositions using them and methods of producing them.)

1. A dispersion composition comprising:

(A)85 to 99.89 wt% of a dispersant (except for the following (B) and (C));

(B)0.01 to 5% by weight of an acetylene glycol represented by the following formula (1) and/or an acetylene glycol ethoxylate represented by the following formula (2);

wherein R is¹And R²Each represents an alkyl group having 1 to 5 carbon atoms,

wherein R is³And R⁴Each represents an alkyl group having 1 to 5 carbon atoms, m and n are each a positive number of 0.5 to 25, and m + n is 1 to 40; and

(C)0.1 to 10% by weight of one or two or more selected from the group consisting of poly oxy (ethylene-propylene) block polymers represented by the following formula (3) having a weight average molecular weight of 1,500 to 20,000, an ethylene oxide content of 20 to 90% by weight, and a propylene oxide content of 10 to 80% by weight:

HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_yH (3)

wherein w, x and y are positive numbers.

2. The dispersion composition according to claim 1, wherein the weight average molecular weight of the dispersant component (a) is 100 or more.

3. The dispersion composition according to claim 1, wherein in the (C) poly (ethylene-propylene) block polymer, the content of ethylene oxide is 35 to 90% by weight and the content of propylene oxide is 10 to 65% by weight.

4. The dispersion composition according to claim 1, wherein (C) the poly (ethylene-propylene) block polymer has a weight average molecular weight of 5,000 to 20,000.

5. A dispersion comprising:

the dispersion composition according to claim 1;

disperse dyes and/or pigments; and

an aqueous solvent.

6. An ink composition comprising the dispersion of claim 5.

7. A method for producing a dispersion comprising: mixing and dispersing the dispersion composition, the disperse dye and/or the pigment according to claim 1 and an aqueous solvent.

8. A method of producing an ink composition, the method comprising:

obtaining a dispersion by mixing and dispersing the dispersion composition, the disperse dye and/or the pigment according to claim 1 and an aqueous solvent; and

mixing the dispersion with at least one substance selected from the group consisting of: water, water-soluble organic solvent, resin, ultraviolet absorbent, antioxidant, pH regulator, preservative and viscosity regulator.

Technical Field

The present invention relates to a dispersion composition, and more particularly to a dispersion composition, a dispersion and an ink composition for dispersing a disperse dye or pigment, and to a method for producing the same.

Background

Disperse dyes or pigments have been used hitherto as colorants for inks. When the disperse dye or pigment is used for the ink, it is necessary to disperse the micronized disperse dye or pigment in water. However, the disperse dye or pigment is insoluble in water, and therefore the dispersant is important for bringing the disperse dye or pigment into a dispersed state and stably maintaining the dispersed state for a long time. Meanwhile, in recent years, it is desired to reduce the particle size of a disperse dye or pigment to improve the fineness of an image, and various dispersion methods and dispersion process conditions have been proposed to reduce the particle size. However, if the disperse dye or pigment is not finely and stably dispersed in the medium, excellent transparency, fineness and color developability cannot be obtained, and clogging of nozzles is caused in the ink for inkjet. However, there are often practical limits to the degree of micronization by dispersion and mechanical comminution of the disperse dye or pigment.

Various compounds have been used as dispersants so far. For example, aromatic sulfonates and lignosulfonates are used as dispersants for dispersing dyes in patent document 1. In patent document 2, a styrene-acrylic acid copolymer, a styrene-methacrylic acid copolymer, a styrene-maleic acid copolymer, a sodium naphthalenesulfonate formalin condensate, or the like is used as a high molecular weight dispersant.

However, in an ink containing a dispersion dye or pigment obtained by using a dispersant, the dispersant is a high molecular weight resin or surfactant, and thus the average particle size of the dispersion dye or pigment is large, and ejection stability or liquid stability is poor.

For example, patent document 3 describes that polyoxyethylene- β -naphthyl ether as a nonionic surfactant and a sodium naphthalenesulfonate formalin condensate as an anionic surfactant are used in combination as a dispersant, and patent document 4 discloses a pigment dispersion containing two or more selected from the group consisting of a sodium naphthalenesulfonate formalin condensate, a polycarboxylic acid graft polymer, and a polyoxyethylene styrylphenyl ether.

In addition, methods using a combination of a dispersant and a surfactant have also been attempted. For example, patent document 5 discloses the use of a dispersant in combination with two or more surfactants. Patent document 6 discloses a composition containing a dispersant, a sulfate-based surfactant, and an acetylene glycol-based surfactant having an HLB value of 6.0 or less. In either case, however, the ability to micronize the disperse dye or pigment is poor, and the dispersion property has room for improvement.

CITATION LIST

Patent document 1: JP-A2000-

Patent document 2: JP-A2007-224210

Patent document 3: JP-A2008-038075

Patent document 4: JP-A2010-111826

Patent document 5: JP-A2016-060772

Patent document 6: JP-A2018-053035

Disclosure of Invention

The present invention has been made in view of the above circumstances and has an object to provide a dispersion combination dispersion and an ink composition using the same, which are capable of atomizing a disperse dye or pigment and have additionally excellent wettability and dispersion stability, and a method for producing the same.

As a result of the research of the present invention in order to achieve the above object, the inventors have found that when a dispersion composition in which a dispersant, an acetylene glycol-based surfactant represented by the following formula (1) and/or the following formula (2), and ethylene oxide having a specific addition mole number and a molecular weight range of a poly (ethylene-propylene) block polymer are blended is used, a disperse dye or pigment can be atomized, and further excellent wettability and dispersion stability can be obtained, and thus the present invention has been completed.

Accordingly, the present invention provides the following dispersion compositions, dispersions and ink compositions using them, and methods of producing them.

1. A dispersion composition comprising:

(A)85 to 99.89 wt% of a dispersant (except for the following (B) and (C));

(B)0.01 to 5% by weight of an acetylene glycol represented by the following formula (1) and/or an acetylene glycol ethoxylate represented by the following formula (2);

wherein R is¹And R²Each represents an alkyl group having 1 to 5 carbon atoms,

wherein R is³And R⁴Each represents an alkyl group having 1 to 5 carbon atoms, m and n are each a positive number of 0.5 to 25, and m + n is 1 to 40; and

(C)0.1 to 10% by weight of one or two or more selected from the group consisting of poly oxy (ethylene-propylene) block polymers represented by the following formula (3) having a weight average molecular weight of 1,500 to 20,000, an ethylene oxide content of 20 to 90% by weight, and a propylene oxide content of 10 to 80% by weight:

HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_yH (3)

wherein w, x and y are positive numbers.

2. The dispersion composition described in the above item 1, wherein the weight average molecular weight of the dispersant component (a) is 100 or more.

3. The dispersion composition described in the above item 1, wherein in the (C) polyoxyethylene (ethylene-propylene) block polymer, the content of ethylene oxide is 35 to 90% by weight and the content of propylene oxide is 10 to 65% by weight.

4. The dispersion composition described in the above item 1, wherein the (C) polyoxyethylene (ethylene-propylene) block polymer has a weight average molecular weight of 5,000 to 20,000.

5. A dispersion comprising:

the dispersion composition described in the above item 1;

disperse dyes and/or pigments; and

an aqueous solvent.

6. An ink composition comprising the dispersion described in 5 above.

7. A method for producing a dispersion comprising: mixing and dispersing the dispersion composition, the disperse dye and/or the pigment and the aqueous solvent described in the above item 1.

8. A method of producing an ink composition, the method comprising:

obtaining a dispersion by mixing and dispersing the dispersion composition, the disperse dye and/or the pigment, and the aqueous solvent described in the above 1; and

mixing the dispersion with at least one substance selected from the group consisting of: water, water-soluble organic solvent, resin, ultraviolet absorbent, antioxidant, pH regulator, preservative and viscosity regulator.

The invention has the advantages of

According to the dispersion composition of the present invention, the disperse dye or pigment can be atomized. In addition, a dispersion and an ink composition using the dispersion composition may exhibit excellent wettability and may exhibit dispersion stability without changing with time.

Detailed Description

The dispersion composition of the present invention contains:

(A)85 to 99.89 wt% of a dispersant (except for the following (B) and (C));

(B)0.01 to 5% by weight of an acetylene glycol represented by the following formula (1) and/or an acetylene glycol ethoxylate represented by the following formula (2);

wherein R is¹And R²Each of which isRepresents an alkyl group having 1 to 5 carbon atoms,

wherein R is³And R⁴Each represents an alkyl group having 1 to 5 carbon atoms, m and n are each a positive number of 0.5 to 25, and m + n is 1 to 40;

(C)0.1 to 10% by weight of one or two or more selected from the group consisting of poly oxy (ethylene-propylene) block polymers represented by the following formula (3) having a weight average molecular weight of 1,500 to 20,000, an ethylene oxide content of 20 to 90% by weight, and a propylene oxide content of 10 to 80% by weight:

HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_yH (3)

wherein w, x and y are positive numbers.

The dispersant of the component (a) is not particularly limited as long as it is a known dispersant other than the following (B) and (C). Examples thereof may include high molecular weight dispersants, low molecular weight surfactants, and the like. However, it is preferable to use a compound having a molecular weight (weight average molecular weight) of 100 or more, and it is preferable to use a high molecular weight dispersant in view of storage stability of the ink. The term "low molecule" means a molecule having a molecular weight (weight average molecular weight) of 1,000 or less, preferably 100 or more. The term "macromolecule" refers to a molecule having a molecular weight (weight average molecular weight) of more than 1,000, preferably a high molecular weight dispersant having a molecular weight of 3,000 to 20,000. The above molecular weight (weight average molecular weight) was measured in accordance with JIS K7252. A dispersant having a weight average molecular weight within the above numerical range may be used in the present invention.

Examples of the high-molecular weight dispersant may include natural gums such as gum arabic and tragacanth, glucosides such as saponin, cellulose derivatives such as methylcellulose, carboxymethylcellulose and hydroxymethylcellulose, lignosulfonates (Na, K, Ca, Mg) or formalin condensates thereof, natural polymers such as shellac, anionic polymers such as polyacrylates, styrene-maleic anhydride copolymers, olefin-maleic anhydride copolymers, polystyrene sulfonates (Na, K), acrylamide-acrylic acid copolymers, sodium alginate, salts of styrene-acrylic acid copolymers, salts of vinylnaphthalene-maleic acid copolymers, salts of naphthalenesulfonic acid formalin condensates, or nonionic polymers such as polyvinyl alcohol, polyalkylene polyamine, polyacrylamide, polyvinylpyrrolidone and polyethylene glycol.

More preferably, it may include cellulose derivatives such as methylcellulose, carboxymethylcellulose and hydroxymethylcellulose, lignosulfonate (Na, K) or formalin condensate, natural polymers such as shellac, polyacrylate (Na, K), styrene-maleic anhydride copolymer, olefin-maleic anhydride copolymer, polystyrene sulfonate (Na, K), acrylamide-acrylic acid copolymer, sodium alginate, salts of styrene-acrylic acid copolymer (Na, K), salts of vinylnaphthalene-maleic acid copolymer (Na, K), salts of naphthalenesulfonic acid formalin condensate (Na, K), polyvinyl alcohol, polyalkylenepolyamine, polyacrylamide, polyvinylpyrrolidone or polyethylene glycol.

In addition, examples of the low molecular weight surfactant may include anionic surfactants such as carboxylate types, e.g., carboxylate salts, ether carboxylate salts, acylamino acid salts, etc., sulfate types, e.g., sulfate ester salts, ether sulfate salt, amide ether sulfate salt, etc., sulfonate types, e.g., sulfonate salts, sulfosuccinate salts, acyl taurates, hydroxyethanesulfonate salts, etc., phosphate ester types, e.g., alkyl monophosphate ester Na salts, alkyl triphosphate ester Na salts, polyoxyethylene alkyl ether phosphate ester salts, di (tri) polyoxyethylene alkyl ether phosphate ester Na salts, polyoxyethylene alkyl ether triphosphate esters, etc., or nonionic surfactants such as oxyethylene chain types, e.g., ether types, ether ester types, oxyethylene chain-oxypropylene chain addition types, ethylenediamine-oxypropylene chain-oxyethylene chain types, hydroxyl group-containing types, e.g., sorbitan esters, glycerides, alkyl fatty acid (mono, poly) esters of polyglycerol, polyglycerol-condensed ricinoleate, organic acid monoglycerides, propylene glycol fatty acid esters, sucrose fatty acid esters, alkyl glycerol ethers, alkyl polyglucosides, lecithin.

Each of these compounds may also be appropriately selected and one or two or more kinds thereof may be used.

The blending amount of the component (a) is 85 to 99.89% by weight, and preferably 90 to 99.8% by weight, based on the total dispersion composition as an active ingredient. If the blending amount of the component (a) is less than 85% by weight, dispersion failure of the disperse dye occurs, and if the blending amount of the component (a) exceeds 99.89% by weight, generation of bubbles increases.

The component (B) of the dispersion composition of the present invention is one or two or more kinds selected from the acetylene glycol represented by the following formula (1) and/or the acetylene glycol of the acetylene glycol ethoxylate represented by the following formula (2):

wherein R is¹And R²Each represents an alkyl group having 1 to 5 carbon atoms.

Wherein R is³And R⁴Each represents an alkyl group having 1 to 5 carbon atoms, m and n are each a positive number of 0.5 to 25, and m + n is 1 to 40.

Here, the total number of moles of addition of ethylene oxide in the ethoxylate represented by formula (2) is 1 to 40 moles, preferably 2 to 12 moles. If the total addition mole number of the ethylene oxides exceeds 40 moles, the static surface tension and the dynamic surface tension of the ink composition increase.

These acetylenic diols as component (B) may be used alone or in combination of two or more, and are used in an amount of 0.01 to 5 wt%, preferably 0.1 to 1 wt%, for producing the dispersion composition of the present invention. If the amount of the acetylenic diol is less than 0.01 wt%, the dynamic surface tension is increased, which causes shrinkage at high-speed printing. If the amount of the acetylenic diol exceeds 5% by weight, the solubility in water is deteriorated to generate aggregates upon blending, and the effect of reducing surface tension cannot be obtained, resulting in shrinkage or remarkably deteriorated stability at low temperature, which makes blending difficult.

The poly (ethylene-propylene) block polymer of component (C) is represented by the following formula (3):

HO(C₂H₄O)_w(C₃H₆O)_x(C₂H₄O)_yH (3)，

wherein w, x and y are positive numbers. w + y is preferably 10 to 200, and x is preferably 10 to 50. In particular, for example, the following compounds may be included, and these may be used alone or in combination of two or more:

HO(C₂H₄O)_w(C₃H₆O)₂₀(C₂H₄O)_yh (where w + y is 27),

HO(C₂H₄O)_w(C₃H₆O)₃₀(C₂H₄O)_yH (where w + y is 160),

HO(C₂H₄O)_w(C₃H₆O)₃₅(C₂H₄O)_yH (where w + y is 30),

HO(C₂H₄O)_w(C₃H₆O)₃₅(C₂H₄O)_yH (where w + y is 48),

HO(C₂H₄O)_w(C₃H₆O)₂₀(C₂H₄O)_yH (where w + y is 155).

In addition, the weight average molecular weight of component (C) is 1,500 to 20,000, and particularly preferably 5,000 to 20,000. If the weight average molecular weight of component (C) is less than 1,500, insoluble substances are produced when blended with the ink because the dissolving ability is lowered and the solubility in water is lowered. If the weight average molecular weight of component (C) exceeds 20,000, the dynamic surface tension is large, which causes bleeding (bleeding) upon printing. In addition, the weight average molecular weight is a value measured by Gel Permeation Chromatography (GPC).

In addition, the content of ethylene oxide is 20 to 90% by weight, and particularly preferably 35 to 90% by weight. If the content of ethylene oxide is less than 20% by weight, the dissolving power is reduced and aggregates are generated. If the content of ethylene oxide exceeds 90% by weight, the dissolving power is increased, but the dynamic surface tension is also increased, resulting in shrinkage at high-speed coating.

The content of propylene oxide is also 10 to 80% by weight, and more preferably 10 to 65% by weight. More preferably, the ethylene oxide content is higher than the propylene oxide content.

The amount of component (C) used for producing the dispersion composition of the present invention is 0.1 to 10% by weight, and preferably 0.5 to 5% by weight. If the amount of component (C) is less than 0.1% by weight, sufficient dissolution of component (B) is not achieved and water solubility is lowered, resulting in aggregates upon blending. If the amount of component (C) exceeds 10% by weight, many bubbles are generated or dynamic surface tension is increased upon blending, resulting in unevenness of the coating or causing shrinkage.

The dispersion composition of the present invention contains components (a), (B) and (C), and has a composition of 100% by weight of (a) + (B) + (C).

The dispersion of the present invention contains the dispersion composition, the disperse dye or pigment, and the aqueous solvent as described above, and is particularly preferably used as an ink composition.

The constituents of the dispersion are described below.

In the dispersion of the present invention, the blending amount of the dispersion composition is preferably 1 to 100 parts by weight, more preferably 10 to 90 parts by weight, and further preferably 30 to 80 parts by weight per 100 parts by weight of the disperse dye and/or the pigment as an active ingredient. If the blending amount of the dispersion composition is too small, the disperse dye or pigment cannot be sufficiently dispersed. In addition, if the blending amount of the dispersion composition is too large, a large amount of the dispersant which is not adsorbed to the disperse dye or pigment is present in the dispersion, which is not preferable.

Known disperse dyes can be used as the disperse dye without particular limitation. Disperse dyes are compounds which are classified by chemical structures such as phenylazo structures (monoazo, disazo), heterocyclic azo structures (thiazolazo, benzothiazolylazo, pyridone azo, pyrazolone azo, thiophenazo, etc.), anthraquinone structures and condensed structures (quinophthalone, styryl, coumarin, etc.), and have characteristics such as poor solubility in water (because they lack water-soluble groups) and have a molecular weight of 2,000 or less (small compared to other dyes).

Examples of disperse dyes that can be preferably used in the present invention include the following:

yellow dyes such as c.i. disperse yellow 3,4, 5, 7,9, 13, 24, 30, 33, 34, 42, 44, 49, 50, 51, 54, 56, 58, 60, 63, 64, 66, 68, 71, 74, 76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98, 99, 100, 104, 114, 116, 118, 119, 122, 124, 126, 135, 140, 141, 149, 160, 162, 163, 164, 165, 179, 180, 182, 183, 186, 192, 198, 199, 202, 204, 210, 211, 215, 216, 218, and 224;

orange dyes such as c.i. disperse oranges 1,3, 5, 7, 11, 13, 17, 20, 21, 25, 29, 30, 31, 32, 33, 37, 38, 42, 43, 44, 45, 47, 48, 49, 50, 53, 54, 55, 56, 57, 58, 59, 61, 66, 71, 73, 76, 78, 80, 89, 90, 91, 93, 96, 97, 119, 127, 130, 139, and 142;

red dyes such as c.i. disperse red 1,4, 5, 7, 11, 12, 13, 15, 17, 27, 43, 44, 50, 52, 53, 54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75, 76, 78, 81, 82, 86, 88, 90, 91, 92, 93, 96, 103, 105, 106, 107, 108, 110, 111, 113, 117, 118, 121, 122, 126, 127, 128, 131, 132, 134, 135, 137, 143, 145, 146, 151, 152, 153, 154, 157, 159, 164, 167, 169, 177, 179, 181, 183, 184, 185, 188, 189, 190, 191, 192, 200, 201, 202, 203, 205, 206, 207, 210, 157, 224, 225, 227, 229, 239, 240, 257, 258, 277, 278, 281, 288, 298, 288, 279, 303, 311, and 310;

violet dyes such as c.i. disperse violet 1,4, 8, 23, 26, 27, 28, 31, 33, 35, 36, 38, 40, 43, 46, 48, 50, 51, 52, 56, 57, 59, 61, 63, 69 and 77;

green dyes such as c.i. disperse green 6:1 and 9;

brown dyes such as c.i. disperse brown 1,2, 4, 9, 13, 19 and 27;

blue dyes such as c.i. disperse blue 3, 7,9, 14, 16, 19, 20, 26, 27, 35, 43, 44, 54, 55, 56, 58, 60, 62, 64, 71, 72, 73, 75, 79, 81, 82, 83, 87, 91, 93, 94, 95, 96, 102, 106, 108, 112, 113, 115, 118, 120, 122, 125, 128, 130, 139, 141, 142, 143, 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, 257, 259, 267, 268, 270, 284, 285, 287, 288, 291, 293, 295, 297, 301, 315, 330, 333, 359, and 360; and

black dyes such as c.i. disperse black 1,3, 10 and 24.

Dyes available from Nippon Kayaku Co., Ltd. that may be preferably used include Kayaset Black K-R, A-N, Kayalon Polyester Black S-200, EX-SF 300, G-SF, BR-SF, 2B-SF 200, TA-SF 200, AUL-S, Kayaset Yellow K-CL, Kayalon Polyester Yellow 4G-E, Kayalon Polyester light 5G-S, Kayaset Red K-BL, Kayalon Red E-BF, SMS-5, SMS-12, Kayalon Red TL-SF, BR-S, BL-E, HL-SF, 3BL-S200, AUL-S, Kayalon Polyester Red B-S200, Kayalon Red-S200, Kayalon Blue BL-S200, Blue-BS 13, FL-K-SF, FL-S13, kayalon Polyester Light Blue BGL-S200, Kayalon Polyester Turq Blue GL-S200, Kayalon Polyester Blue Green FCT-S, and the like.

Dyes available from origin Chemical Industries co., ltd. that may be preferably used include Valifast Black 3806, 3810, 3820, Oil Black BS, BY, B-85, 860, Water Yellow 6C; valifast Yellow 1101, 1105, 3110, 3120, 4120, 4126, Oplas Yellow 130, 140, Oil Yellow GG-S, 105, 107, 129, 818, Water Red 27; valifast Red 1306, 1355, 2303, 3311, 3320; valifast Orange 3210; valifast Brown 2402, Oil Red 5B, Oil Pink 312, Oil Brown BB; valifast Blue 1601, 1603, 1605, 2606, 3806, 3820, Oil Blue #15, #613, 613, N14, BOS, etc.

Dyes available from Sumitomo Chemical Co., Ltd. that may be preferably used include Sumikaron Black S-BL, S-BF very concentrated, S-RPD, S-XE 300%, Sumikaron Yellow SE-4G, SE-5G, SE-3GL concentrate, SE-RPD, Sumikaron Brilliant FlavS-10G, Sumikaron Red E-FBL, E-RPD (E), S-RPD (S), Sumikaron Brilliant Red S-BF, S-BLF, SE-BL, SE-BGL, SE-2BF, SE-3BL (N), Sumikaron Red E-FBL, E-RPD (E), S-RPD S), Sumikaron Red S-BF (S-BF), S-BLF, SE-BL, BGL, S-BL, S-3 BL, S-BLSE-3 BL, S-BLN, S-RBN S-RBS, S-RPD (S-RBS), sumikaron TurquoiseBlue S-GL, S-GLFgrain, and the like.

Dyes available from BASF that can be preferably used include Basacryl Black X-BGW, Naozapon Black X-51, X-55, Neozapon Yellow 081, Lurafix Yellow 138, etc., Zapon Blue 807, Neozapon Blue 807, Lurafix Blue590, 660, Orasol Black RLI, RL, CN, Oracet Yellow 8GF, GHS, Orasol Red G, Oracet Pink RP, Orasol Blue GL, GN, 2R, etc.

Dyes available from Taoka Chemical Company, Limited, that may be preferably used include Oleosol Fast Black AR, RL, Oleosol Fast Pink FB, Rhodamine A, B, B gran, Oleosol Fast yellow 2G, Oleosol Fast Blue ELN, and the like.

Dyes available from Hodogaya Chemical co., ltd. that may be preferably used include Spilon black bnh, MH special, and the like.

Dyes available from Mitsui Chemicals, Incorporated that may be preferably used include PS Yellow GG, MS Yellow HD-180, PS Red G, MS Magenta VP, and the like.

Dyes available from Bayer AG that can be preferably used include Ceres Blue GN 01 and the like.

Dyes available from Sumika Color co., ltd. that may be preferably used include TSYellow 118 cake, ESCYellow 155, Sumiplast Yellow HLR, GC, TS Turq Blue 618, 606, ESC Blue 655, 660, Sumiplast Blue s, OA, and the like.

Known pigments may be used as the pigment without particular limitation. Examples of the organic pigment may include azo pigments such as soluble azo pigments, insoluble azo pigments, and condensed azo pigments; polycyclic pigments such as quinacridone pigments, perylene pigments, perinone pigments, isoindolinone pigments, isoindoline pigments, dioxazine pigments, thioindigo pigments, anthraquinone pigments, quinophthalone pigments, metal complex pigments, and diketopyrrolopyrrole pigments; and phthalocyanine pigments. In addition, examples of the inorganic pigment may include carbon black, metal oxides, metal hydroxides, metal sulfides, metal ferrocyanides, metal chlorides, and the like. In addition, examples of the carbon black may include furnace black, lamp black, acetylene black, channel black, and the like.

Specific examples of the pigment may include red pigments such as c.i. pigment red 7,9, 14, 41, 48:1, 48:2, 48:3, 48:4, 81:1, 81:2, 81:3, 122, 123, 146, 149, 168, 177, 178, 179, 187, 200, 202, 208, 210, 215, 224, 254, 255, and 264;

yellow pigments such as c.i. pigment yellow 1,3, 5, 6, 14, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 93, 97, 98, 104, 108, 110, 128, 138, 139, 147, 150, 151, 154, 155, 166, 167, 168, 170, 180, 188, 193, 194, and 213;

orange pigments such as c.i. pigment orange 36, 38 and 43;

blue pigments such as c.i. pigment blue 15, 15:2, 15:3, 15:4, 15:6, 16, 22 and 60;

green pigments such as c.i. pigment green 7, 36 and 58;

violet pigments such as c.i. pigment violet 19, 23, 32 and 50; and

black pigments such as c.i. pigment black 7.

Among these, c.i. pigment red 122, c.i. pigment yellow 74, 128 and 155, c.i. pigment blue 15:3, 15:4 and 15:6, c.i. pigment green 7 and 36, c.i. pigment violet 19 and c.i. pigment black 7, for example, can be preferably used.

As for the disperse dye and/or pigment included in the dispersion, the type, particle size, treatment method, and the like may be appropriately selected according to the intended purpose thereof. The disperse dye and the pigment included in the dispersion may be used alone or in a combination of two or more.

The concentration of disperse dyes and pigments in the dispersion is preferably from 1 to 50% by weight, and more preferably from 5 to 40% by weight, per 100% by weight of the dispersion. If the concentration of the disperse dye and pigment exceeds 50% by weight, the density of the disperse dye and pigment in the dispersion is increased, thereby disturbing free movement. There is a possibility of aggregation.

Water and/or a water-soluble organic solvent may be used as the aqueous solvent, and two or more of such solvents may be used in mixture. The water is preferably pure water or ion-exchanged water (deionized water). In addition, examples of the water-soluble organic solvent that can be used include alcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, and tert-butanol; glycols such as ethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, triethylene glycol, 1,2, 6-hexanetriol, thiodiglycol, hexylene glycol and diethylene glycol; glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether and triethylene glycol monobutyl ether; polyols such as glycerol; and nitrogen-containing compounds such as N-methyl-2-pyrrolidone, 2-pyrrolidone and 1, 3-dimethyl-2-imidazolidinone. In addition, in the case of using a mixed solution of water and a water-soluble organic solvent, the proportion of the water-soluble organic solvent is 10% by weight or less, preferably 0.01 to 5% by weight per 100% by weight of the dispersion.

The proportion of water and aqueous organic solvent in the dispersion is preferably from 5 to 95% by weight, and more preferably from 30 to 90% by weight, per 100% by weight of the dispersion.

The process for producing the dispersion of the present invention preferably comprises mixing and dispersing the above-mentioned dispersion composition, disperse dye and/or pigment and aqueous solvent, among others. For example, the dispersion can be obtained by mixing the dispersant with the disperse dye and/or pigment and the aqueous solvent using a mixing and dispersing apparatus such as a paint shaker, a bead mill, a ball mill, a dissolver, and a kneader. Further, in the case of using components which are solid at room temperature, they may be heated and mixed if necessary.

The dispersion has a viscosity of preferably 10.0mPa · s or less, and more preferably 5.0mPa · s or less. It is also desirable that the lower limit of the viscosity of the dispersion is at least 1.0 mPas. The viscosity is measured here at 25 ℃.

The average particle size of the disperse dye and/or pigment in the dispersion has, for example, 330nm or less, and preferably 100 to 300nm as the particle size after 5 hours of dispersion in the dispersion. "average particle size" herein refers to the median diameter (D50).

The static surface tension of the dispersion is preferably 50mN/m or less, and more preferably 45mN/m or less, and the lower limit is more preferably 20mN/m or more.

In addition, the ink composition of the present invention preferably contains the following (i) to (iii):

(i) the composition is dispersed in a solvent in which the solvent is soluble,

(ii) disperse dyes and/or pigments, and

(iii) water and/or a water-soluble organic solvent.

Further, it is preferable to optionally add additives such as a resin, an ultraviolet absorber, an antioxidant, a pH adjuster, a preservative, and a viscosity adjuster.

The concentration of the disperse dye and/or the pigment in the ink composition is preferably 0.1 to 20% by weight, and more preferably 0.1 to 10% by weight, per 100% by weight of the ink composition.

The proportion of water and/or water-soluble organic solvent in the ink composition is preferably 50 to 99% by weight, and more preferably 60 to 95% by weight, per 100% by weight of the ink composition.

The ink composition preferably contains a resin having a hydrophobic group and a hydrophilic group, such a polymer preferably having at least one functional group selected from an alkyl group, a cycloalkyl group and an aryl group as a hydrophobic group, and further such a polymer preferably having at least one functional group selected from a carboxyl group, a sulfo group, a hydroxyl group, an amino group, an amide group and functional groups thereof as a hydrophilic functional group, such a polymer may be obtained by polymerizing an oligomer or monomer having a functional group such as an acryloyl group, a methacryloyl group, a vinyl group and an allyl group, and in particular, examples of such monomers and oligomers that may be used include styrene, tetrahydrofurfuryl acrylate, butyl methacrylate, (α,2, 3 or 4) -alkylstyrene, (α,2, 3 or 4) -alkoxystyrene, 3, 4-dimethylstyrene, α -phenylstyrene, divinylbenzene, vinylnaphthalene, dimethylamino (meth) acrylate, (meth) dimethylaminoethyl (meth) acrylate, dimethylaminopropyl acrylate, N-dimethylaminoethyl acrylate, morpholine, N-dimethylacrylamide, N-diethylacrylamide, (meth) acrylate, (meth) acrylic acid, 1-bis (meth) acrylate, (meth) acrylic acid) acrylate, bis (meth) acrylate, (meth) acrylic acid (meth) acrylate, bis (meth) acrylate, (meth) acrylic acid (1-propylene glycol (meth) acrylate, bis (meth) acrylate, (meth) acrylic acid (acrylate, (meth) acrylate, (.

The proportion of the resin in the ink composition is not particularly limited, but is preferably 0 to 30% by weight, and more preferably 0 to 20% by weight, per 100% by weight of the ink composition. In addition, when the resin is blended in the ink composition, the amount thereof is preferably set to at least 1% by weight.

In addition, various additives may be contained in the ink composition. Examples of the additives may include ultraviolet absorbers, antioxidants, pH adjusters, preservatives, viscosity adjusters, and the like. These may be appropriately selected and mixed into the ink composition. These additives may be incorporated in the balance of 100% by weight of the dispersion and ink composition excluding the disperse dye and/or pigment, water and/or water-soluble organic solvent and resin, particularly in a proportion of 0 to 10% by weight per 100% by weight of the ink composition.

In addition, the method of producing the ink composition is not particularly limited, but a method including obtaining a dispersion by mixing and dispersing the above-described dispersant, disperse dye and/or pigment, and aqueous solvent; and mixing the dispersion with at least one substance selected from the group consisting of water, water-soluble organic solvents, resins, ultraviolet absorbers, antioxidants, pH adjusters, preservatives, and viscosity adjusters.

The ink composition is applied to a recording medium by an inkjet recording method, a recording method involving the use of a writing instrument such as a pen, and some other printing method. The ink composition of the present invention is particularly preferably used in an inkjet recording method.