JP2001294771A - Coloring composition, inkjet ink and ink-jet recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coloring composition having no paper dependence, excellent color development/tone upon printing in any selected paper, excellent water resistance, light-resistance and the like and suitable for an ink which enables high recording density/high image quality or the like. SOLUTION: The coloring composition comprises an oil-soluble dye represented by formula (1) [wherein R1 to R4 are each independently a hydrogen atom or a substituent; R5 and R6 are each independently a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkanesufonyl group or an arenesulfonyl group; R1 and R2, R2 and R5, R5 and R6, R4 and R6 and/or R3 and R4 may bond with each other to form a ring; p is any integer of 0 to 3; and A is any of the groups represented by formulae (2) to (4)].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coloring composition suitable for a water-based ink for writing, a water-based printing ink, an ink for information recording, etc., and a thermal, piezoelectric, electric or acoustic ink jet containing the coloring composition. The present invention relates to an inkjet ink suitable for a system and an inkjet recording method using the same.

[0002]

2. Description of the Related Art In recent years, with the spread of computers, ink jet printers have been widely used not only in offices but also at home for printing on paper, film, cloth and the like. As ink-jet inks, oil-based inks, water-based inks, and solid inks are known. Among these, water-based inks are advantageous in terms of ease of production, handling, odor, safety, etc. Ink is the mainstream.

The use of a water-soluble dye in the aqueous ink has the advantages that the ink is easy to manufacture, has excellent storage stability, has good color tone, and has high color density. However, on the other hand, the water-soluble dye has poor water resistance, and when printed on so-called plain paper, causes bleeding (bleeding), thereby causing a problem that the printing quality is remarkably deteriorated and the light resistance is poor.

Therefore, aqueous inks using pigments and disperse dyes for the purpose of solving the above-mentioned problems have been disclosed in, for example, JP-A-56-1981.
157468, JP-A-4-18468, 10-1
Nos. 10126, 10-195355, and the like. However, in the case of these water-based inks, the water resistance is improved to some extent, but is not sufficient, and the storage stability of the dispersion of the pigment or the disperse dye in the water-based ink is lacking, causing clogging at the ink ejection port. easy,
There are problems such as. In addition, these aqueous inks generally have insufficient hue and have a problem in color reproducibility based on insufficient color tone.

On the other hand, JP-A-58-45272, JP-A-6-340835, 7-268254, and 7-2
Nos. 68257 and 7-268260 propose a method of including a dye in urethane or polyester dispersion particles. However, in these cases, the color reproducibility based on insufficient color tone is not sufficient, and the dispersion stability and water resistance of the dye-containing polymer dispersion when the dye is included at a desired concentration are not necessarily sufficient. There is.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, has no paper dependence, has excellent color developability and color tone when printed on arbitrarily selected paper, and has excellent handleability and odor. Excellent in safety, water resistance, light resistance, etc., enabling high recording density and high image quality, aqueous ink for writing, aqueous printing ink,
A coloring composition suitable for an information recording ink or the like, containing the coloring composition, and suitable for a thermal, piezoelectric, electric field or acoustic ink jet system. When printing or the like is performed using a nozzle or the like, an There is no clogging, no dependence on paper, and color development when printing on arbitrarily selected paper.
Excellent color tone, and water-resistant, light-fast inkjet ink, and, using the inkjet ink,
An object of the present invention is to provide an ink jet recording method capable of high quality recording.

[0007]

Means for solving the above problems are as follows. That is, <1> a colored composition containing an oil-soluble dye represented by the following general formula (1).

[0008]

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In the general formula (1), R ¹ , R ² , R ³ and R ⁴
Each independently represents a hydrogen atom or a substituent, and R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkanesulfonyl group or an arenesulfonyl group. R ¹ and R ² , R ² and R ⁵ , R
⁵ and R ⁶ , R ⁴ and R ⁶ and / or R ³ and R ⁴ may be bonded to each other to form a ring. p represents any integer of 0 to 3. A represents a group represented by any of the following formulas (2) to (4).

[0010]

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In the general formula (2), R ⁷ represents an aryl group or a heterocyclic group, and R ⁸ represents an aryl group, a heterocyclic group or-
Represents NR ⁹ R ^10, each independently R ⁹ and R ¹⁰ are hydrogen atom, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, an acyl group, alkanesulfonyl group, arenesulfonyl group, a carbamoyl group, a sulfamoyl group, Represents an alkoxycarbonyl group, an aryloxycarbonyl group, an alkoxysulfonyl group, an aryloxysulfonyl group or an amino group, wherein R ⁹ and R ¹⁰ are
May form a nitrogen-containing ring. However, R ⁹ and R ¹⁰ do not simultaneously represent a hydrogen atom. * Represents a bonding position.

[0012]

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In the general formula (3), EWG¹Is Hammet's place
Substitution constant σ_pRepresents an electron-withdrawing group having a value of 0.30 or more,
R¹¹Represents a substituent, and m represents an integer of 0 to 2
You. R ¹¹And EWG¹May combine with each other to form a ring
If m = 2, two R¹¹Are identical to each other
May also be different. * Represents a bonding position.

[0014]

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In the general formula (4), EWG ² represents an electron-withdrawing group having a Hammett's substituent constant σ _p value of 0.30 or more;
R ¹² and R ¹³ each independently represents a substituent, n represents 0 or 1, X represents O or N-SO ₂ -R ^14, R
¹⁴ represents an alkyl group or an aryl group. * Represents a bonding position.

<2> The colored composition according to <1>, wherein the oil-soluble dye is dispersed in an aqueous medium. <3> Including a dye dispersion obtained by dispersing an oil-soluble dye dissolved in a high boiling organic solvent having a boiling point of 150 ° C. or higher and a relative dielectric constant at 25 ° C. of 3 to 12 in an aqueous medium <2. > The coloring composition described in the above. <4> The colored composition according to <2>, including a colored fine particle dispersion in which colored fine particles containing an oil-soluble dye and an oil-soluble polymer are dispersed in an aqueous medium. <5> The colored composition according to <4>, wherein the colored fine particle dispersion contains a high-boiling organic solvent. <6> The colored composition according to <4> or <5>, wherein the colored fine particles have an oil-soluble dye dispersed in an oil-soluble polymer. <7> The coloring composition according to any one of <1> to <6>, which is used for an ink composition. <8> An inkjet ink comprising the coloring composition according to any one of <1> to <7>. <9> An ink jet recording method characterized by performing recording using the ink for ink jet described in <8>.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the coloring composition, ink jet ink and ink jet recording method of the present invention will be described.

(Coloring composition) The coloring composition of the present invention is characterized by containing an oil-soluble dye represented by the general formula (1). -Oil-soluble dye- The compound represented by the formula (1) will be described below. In the following description, a compound in which one of the groups shown in the general formula (1) has the following preferable range is preferable, and a compound in which more groups have the following preferable range is more preferable. Compounds in which all groups are in the following preferred ranges are most preferred.

First, in the present invention, a group containing the following substituent group is defined as "R ⁴⁰ ". Examples of the substituent group include a halogen atom (e.g., a fluorine atom, a chlorine atom, a bromine atom, etc.), an alkyl group (preferably a linear or branched alkyl group having 1 to 40 carbon atoms, e.g., a methyl group, an ethyl group Group, propyl group, isopropyl group, butyl group, t-butyl group, 1-octyl group, tridecyl group, etc.), cycloalkyl group (preferably having 3 carbon atoms).
To 40 cycloalkyl groups, for example, a cyclopropyl group, a 1-ethylcyclopropyl group, a cyclopentyl group, a cyclohexyl group, a 1-norbornyl group, a 1-adamantyl group and the like, an alkenyl group (preferably having 2 carbon atoms).
An alkenyl group having from 40 to 40, for example, a vinyl group, an allyl group, a 3-buten-1-yl group or the like; an aryl group (preferably an aryl group having 6 to 32 carbon atoms;
Phenyl group, 1-naphthyl group, 2-naphthyl group, etc.),

Heterocyclic group (preferably 5 to 32 carbon atoms)
~ 8-membered heterocyclic group, for example, 2-thienyl group, 4-
Pyridyl group, 2-furyl group, 2-pyrimidinyl group, 1-
Pyridyl group, 2-benzothiazolyl group, 1-imidazolyl group, 1-pyrazolyl group, benzotriazol-2-yl group, etc., cyano group, silyl group (preferably having 3 carbon atoms)
-40 silyl groups, for example, trimethylsilyl group, triethylsilyl group, tributylsilyl group, t-butyldimethylsilyl group, t-hexyldimethylsilyl group, etc.), hydroxyl group, carboxyl group, nitro group,
An alkoxy group (preferably an alkoxy group having 1 to 40 carbon atoms, for example, methoxy group, ethoxy group, 1-butoxy group, 2-butoxy group, isopropoxy group, t-butoxy group, dodecyloxy group, etc.), cycloalkyl An alkyloxy group (preferably a cycloalkyloxy group having 3 to 8 carbon atoms, such as a cyclopentyloxy group or a cyclohexyloxy group), an aryloxy group (preferably an aryloxy group having 6 to 40 carbon atoms, for example, Phenoxy group, 2-naphthoxy group, etc.),

Heterocyclic oxy group (preferably having 1 to 4 carbon atoms)
0, for example, a 1-phenyltetrazole-5-oxy group, a 2-tetrahydropyranyloxy group, a 2-furyloxy group, etc., a silyloxy group (preferably a silyloxy group having 1 to 40 carbon atoms) And
For example, a trimethylsilyloxy group, a t-butyldimethylsilyloxy group, a diphenylmethylsilyloxy group, etc., an acyloxy group (preferably an acyloxy group having 2 to 40 carbon atoms, for example, an acetoxy group, a pivaloyloxy group, a benzoyloxy group, A dodecanoyloxy group or the like), an alkoxycarbonyloxy group (preferably an alkoxycarbonyloxy group having 2 to 40 carbon atoms, such as an ethoxycarbonyloxy group or a t-butoxycarbonyloxy group), a cycloalkyloxycarbonyloxy group ( It is preferably a cycloalkyloxycarbonyloxy group having 4 to 40 carbon atoms, for example, a cyclohexyloxycarbonyloxy group or the like, an aryloxycarbonyloxy group (preferably having 7 to 4 carbon atoms).
A carbamoyloxy group (preferably a carbamoyloxy group having 1 to 40 carbon atoms, for example, an N, N-dimethylcarbamoyloxy group, an N- Butylcarbamoyloxy group),

A sulfamoyloxy group (preferably a sulfamoyloxy group having 1 to 40 carbon atoms;
N, N-diethylsulfamoyloxy group, N-propylsulfamoyloxy group, etc., alkanesulfonyloxy group (preferably alkanesulfonyloxy group having 1 to 40 carbon atoms, for example, methanesulfonyloxy group, hexadecane An arenesulfonyloxy group (preferably an arenesulfonyloxy group having 6 to 40 carbon atoms, such as a benzenesulfonyloxy group), and an acyl group (preferably having 1 carbon atom).
To 40 acyl groups, for example, formyl group, acetyl group, pivaloyl group, benzoyl group, tetradecanoyl group, etc., alkoxycarbonyl group (preferably alkoxycarbonyl group having 2 to 40 carbon atoms, for example, methoxy group) A carbonyl group, an ethoxycarbonyl group, an octadecyloxycarbonyl group and the like, a cycloalkyloxycarbonyl group (preferably a cycloalkyloxycarbonyl group having 4 to 40 carbon atoms, for example, a cyclohexyloxycarbonyl group and the like), an aryloxycarbonyl group ( Preferably an aryloxycarbonyl group having 7 to 40 carbon atoms, such as a phenoxycarbonyl group),

Carbamoyl group (preferably having 1 to 4 carbon atoms)
A carbamoyl group, for example, a carbamoyl group,
An N, N-dibutylcarbamoyl group, an N-ethyl-N-octylcarbamoyl group, an N-propylcarbamoyl group, an amino group (preferably an amino group having 32 or less carbon atoms, for example, an amino group, a methylamino group, N, N-
Dioctylamino group, tetradecylamino group, octadecylamino group, etc.), anilino group (preferably having 6 carbon atoms)
~ 40 anilino groups, for example, anilino group, N-
A methylanilino group and the like; a heterocyclic amino group (preferably a heterocyclic amino group having 1 to 40 carbon atoms;
A pyridylamino group), a carbonamide group (preferably a carbonamide group having 2 to 40 carbon atoms, for example,
Acetamido group, benzamido group, tetradecanamido group, etc., ureido group (preferably ureido group having 1 to 40 carbon atoms, for example, ureido group, N, N-dimethylureido group, N-phenylureido group, etc.), imide Groups (preferably an imide group having 10 or less carbon atoms, such as an N-succinimide group and an N-phthalimido group), and an alkoxycarbonylamino group (preferably an alkoxycarbonylamino group having 2 to 40 carbon atoms, for example, Methoxycarbonylamino group, ethoxycarbonylamino group, t-butoxycarbonylamino group, octadecyloxycarbonylamino group, etc., cycloalkyloxycarbonylamino group (preferably having 4 to 4 carbon atoms)
0 is a cycloalkyloxycarbonylamino group,
For example, cyclohexyloxycarbonylamino group),

An aryloxycarbonylamino group (preferably an aryloxycarbonylamino group having 7 to 40 carbon atoms, such as a phenoxycarbonylamino group), a sulfonamide group (preferably a sulfonamide group having 1 to 40 carbon atoms) There are, for example, a methanesulfonamide group, a butanesulfonamide group, a benzenesulfonamide group, a hexadecanesulfonamide group and the like, a sulfamoylamino group (preferably a sulfamoylamino group having 1 to 40 carbon atoms, for example, An N, N-dipropylsulfamoylamino group, an N-ethyl-N-dodecylsulfamoylamino group, an azo group (preferably an azo group having 1 to 40 carbon atoms, such as a phenylazo group), an alkylthio Group (preferably an alkylthio group having 1 to 40 carbon atoms For example, an ethylthio group, an octylthio group and the like, a cycloalkylthio group (preferably a cycloalkylthio group having 3 to 40 carbon atoms, such as a cyclohexylthio group), and an arylthio group (preferably an arylthio group having 6 to 40 carbon atoms) And a heterocyclic thio group (preferably a heterocyclic thio group having 1 to 40 carbon atoms, for example, a 2-benzothiazolylthio group, a 2-pyridylthio group, a 1-phenyltetrazolylthio group). Group), an alkylsulfinyl group (preferably an alkylsulfinyl group having 1 to 40 carbon atoms, such as a dodecanesulfinyl group),

An arenesulfinyl group (preferably an arenesulfinyl group having 6 to 40 carbon atoms;
A benzenesulfinyl group, an alkanesulfonyl group (preferably an alkanesulfonyl group having 1 to 40 carbon atoms, such as a methanesulfonyl group and an octanesulfonyl group), an arenesulfonyl group (preferably, an arenesulfonyl group having 6 to 40 carbon atoms) A benzenesulfonyl group, a 1-naphthalenesulfonyl group and the like, an alkoxysulfonyl group (preferably having 1 to 1 carbon atoms).
For example, a methoxysulfonyl group, an ethoxysulfonyl group, etc.), a cycloalkyloxysulfonyl group (preferably having 3 to 4 carbon atoms).
0, such as a cyclopropyloxysulfonyl group, an aryloxysulfonyl group (preferably an aryloxysulfonyl group having 6 to 40 carbon atoms, such as a phenoxysulfonyl group and a p-methylphenoxy group. A sulfamoyl group), a sulfamoyl group (preferably a sulfamoyl group having 32 or less carbon atoms, for example, a sulfamoyl group,
N, N-dipropylsulfamoyl group, N-ethyl-N
-Dodecylsulfamoyl group), a sulfo group, a phosphonyl group (preferably a phosphonyl group having 1 to 40 carbon atoms, such as a phenoxyphosphonyl group, an octyloxyphosphonyl group, a phenylphosphonyl group, etc.), a phosphino group An ilamino group (preferably a phosphinoylamino group having 2 to 40 carbon atoms, such as a diethoxyphosphinoylamino group and a dioctyloxyphosphinoylamino group).

In the general formula (1), R ¹ , R ² , R ³ and R ⁴ each independently represent a hydrogen atom or a substituent.
When R ¹ , R ² , R ³ and R ⁴ represent a substituent, the substituents are the same as those described for R ⁴⁰ . R ¹ , R ² , R
³ and R ⁴ may be further substituted by the group designated as R ⁴⁰ .

R ¹ and R ³ are preferably each independently a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a heterocyclic group, a cyano group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, an acyloxy group, a carboxyl group. Group, alkoxycarbonyl group, carbamoyl group, carbonamido group, ureido group, alkoxycarbonylamino group, alkylthio group, alkanesulfonyl group, arenesulfonyl group or sulfamoyl group, more preferably,
A hydrogen atom, a halogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group, a carbonamide group, a ureido group or an alkoxycarbonylamino group. Most preferably, R ¹ is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a carbonamide group, an alkoxycarbonylamide group or a ureido group, and R ³ is a hydrogen atom. These preferred embodiments are the same as specific examples of the groups exemplified as R ^40.

R ² and R ⁴ are preferably each independently a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cyano group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group, a carbonamide group, a ureido group or An alkoxycarbonylamino group, more preferably a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an alkoxycarbonyl group, a carbamoyl group, a carbonamide group, a ureido group or an alkoxycarbonylamino group. Most preferably, it is a hydrogen atom. These preferred embodiments are the same as specific examples of the groups exemplified as R ^40.

In the general formula (1), R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkanesulfonyl group or an arenesulfonyl group. These preferred embodiments are alkyl groups in exemplified as R ^40, an aryl group, a heterocyclic group,
This is the same as the specific examples of the acyl group, alkane sulfonyl group and arene sulfonyl group. R ⁵ and R ⁶ are R
^The group represented by ⁴⁰ may be further substituted.

R ⁵ and R ⁶ are each independently preferably a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, more preferably a hydrogen atom, an alkyl group or an aryl group, and more preferably an alkyl group. Is most preferred.

In the general formula (1), any ^one of R ¹ and R ² , R ² and R ⁵ , R ⁵ and R ⁶ , R ⁴ and R ^6, and R ³ and R ⁴ are bonded to each other to form a ring. May be formed. When R ¹ and R ² and / or R ³ and R ⁴ are bonded to each other to form a ring, they form an aromatic ring such as a 5- or 6-membered benzene ring, or a pyridine ring, It is preferable to form an aromatic heterocycle such as an imidazole ring, a thiazole ring and a pyrimidine ring. When R ² and R ⁵ and / or R ⁴ and R ⁶ are bonded to each other to form a ring, 5
It preferably forms a 7-membered saturated ring, more preferably a 5- or 6-membered saturated ring. When R ⁵ and R ⁶ are bonded to each other to form a ring, 5 to 7
It is preferable to form a membered saturated ring, and it is preferable to form a pyrrolidine ring, a piperidine ring or a morpholine ring.

In the above general formula (1), p represents an integer of 0 to 3, preferably 0, 1 or 2.
More preferably, it is 0 or 1.

In the general formula (1), A represents a group represented by any of the general formulas (2) to (4). In the general formula (2), R ⁷ represents an aryl group or a heterocyclic group. Preferred specific examples thereof are the same as the specific examples of the aryl group and the heterocyclic group in R ⁴⁰ . Also,
R ⁷ may be further substituted by the group represented by R ⁴⁰ .

In the general formula (2), R ⁷ is preferably a group represented by the following general formula (5).

[0035]

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In the general formula (5), R ¹⁵ represents —OH or —NR ⁹ R ¹⁰ , and R ⁹ and R ¹⁰ are the same as those in the general formula (2)
These have the same meanings as R ⁹ and R ¹⁰ described below. R ¹⁶ represents a substituent, s represents 0 or 1, and t represents an integer of 0 to 4.

R ¹⁵ preferably represents —NR ⁹ R ¹⁰ .
The substituent represented by R ¹⁶ is the same as the group represented by R ⁴⁰ .
Among them, halogen atom, cyano group, nitro group, carboxyl group, alkyl group, alkoxy group, carbamoyl group,
Sulfamoyl, acyl, acyloxy, alkoxycarbonyl, acylamino, sulfonamide, ureido, alkoxycarbonylamino, alkoxysulfonylamino, and hydroxyl groups are preferred. s is preferably 1 and t is preferably 0.

In the general formula (2), R ⁸ is an aryl group,
Represents a heterocyclic group or —NR ⁹ R ¹⁰ . When R ⁸ represents an aryl group or a heterocyclic group, they have the same meaning as defined in the description of R ⁷ .

R ⁹ and R ¹⁰ are each independently a hydrogen atom,
Alkyl group, alkenyl group, aryl group, heterocyclic group, acyl group, alkanesulfonyl group, arenesulfonyl group, carbamoyl group, sulfamoyl group, alkoxycarbonyl group, aryloxycarbonyl group, alkoxysulfonyl group, aryloxysulfonyl group or amino group Represents These preferred specific examples are the same as the specific examples of each group in R ⁴⁰ . R ⁹ and R ¹⁰ may be further substituted by the group represented by R ⁴⁰ . Further, R ⁹ and R ¹⁰ are bonded to each other to form 5
A 7-membered nitrogen-containing ring may be formed. However, R ⁹ and R ¹⁰
And do not represent a hydrogen atom at the same time.

R ⁹ is preferably a hydrogen atom. R ¹⁰
Is preferably an acyl group having 1 to 36 carbon atoms, an alkanesulfonyl group or arene sulfonyl group having 1 to 36 carbon atoms, a carbamoyl group having 1 to 36 carbon atoms, or an alkoxycarbonyl group having 2 to 36 carbon atoms.

In the general formula (3), EWG ¹ represents an electron-withdrawing group having a Hammett's substituent constant σ _p value of 0.30 or more. Here, the Hammett's substituent constant σ _p value is H
Ansch. C. Leo et al. (for example, J. Med. Chem. 16, 1207 (1
973); It is preferable to use the values described in Ibid. 20, 304 (1977)).

Examples of the electron-withdrawing group having a σ _p value of 0.30 or more include cyano, nitro, acyl, carbamoyl, phosphono, alkoxycarbonyl, phosphonyl, sulfamoyl, alkanesulfonyl, arene Examples thereof include a sulfonyl group and a perfluoroalkyl group. Specific examples of the σ _p value of the group include a cyano group 0.66, a nitro group 0.78, and an acetyl group.
0.50, methoxycarbonyl group 0.45, methanesulfonyl group 0.72, CF ₃ group 0.54, carbamoyl group 0.36.

EWG ¹ is preferably a cyano group, an alkanesulfonyl group, an arenesulfonyl group, an acyl group, a perfluoroalkyl group, a carbamoyl group or an alkoxycarbonyl group, and is preferably a cyano group, a perfluoroalkyl group or a carbamoyl group. Is more preferred.

In the general formula (3), R ¹¹ represents a substituent. The substituent is the same as the group shown as R ⁴⁰ . R ¹¹ may be further substituted by the group represented by R ⁴⁰ .

In the general formula (3), m represents an integer of 0 to 2.

R ¹¹ and EWG ¹ may be bonded to each other to form a ring, and when m = 2, the two R ¹¹ may be the same or different.

In the general formula (4), EWG ² represents an electron-withdrawing group having a Hammett's substituent constant σ _p value of 0.30 or more. Specifically, it has the same meaning as EWG ¹ defined in the general formula (3).

In the general formula (4), R ¹² and R ¹³ each independently represent a substituent. The substituent is the same as the group shown as R ⁴⁰ . R ¹² and R ¹³ may be further substituted by the group represented by R ⁴⁰ . R ¹² is preferably a substituent having a Hammett's substituent constant σ _p value of 0.30 or more. R ¹³ has 1 to 30 carbon atoms
Preferred is an alkyl group, a cycloalkyl group, an alkenyl group or an aryl group having 6 to 30 carbon atoms.

In the general formula (4), n represents 0 or 1. n is preferably 0.

In the general formula (4), X is O (oxygen atom)
Or an N-SO ₂ -R ^14. R ^{1 4} represents an alkyl group or an aryl group. Preferred examples of the alkyl group and aryl group are the same as the specific examples of each group in exemplified as R ^40.

In the general formulas (2) to (4), * represents a bonding position, that is, a bonding position as A in the general formula (1).

Among them, A is preferably a group represented by the general formula (3).

Specific examples (exemplary compounds (1) to (40)) of the compound represented by formula (1) are shown below.
The present invention is not limited by the following specific examples.

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[0059]

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[0060]

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The compound represented by the general formula (1) can be easily synthesized by a known method. For example, it can be easily synthesized by using a coupler compound corresponding to the partial structure of A in the general formula (1) as a reagent. Specific examples of the coupler compound are described in JP-A-63-226653,
Compounds described in JP-A-219242, JP-A-4-188137, and JP-A-4-190347 can be used.

The coloring composition of the present invention has the general formula (1)
It is preferable that the oil-soluble dye represented by the following formula is dispersed in an aqueous medium. The aqueous medium may contain at least water, specifically, water, or a mixture of water and a water-miscible organic solvent, if necessary, a surfactant,
Those to which additives such as an anti-drying agent (wetting agent), a stabilizer and a preservative are added are preferred.

The color composition of the present invention is preferably in the form of a dispersion containing colored fine particles or a dispersion of dyes.

—Colored Particle Dispersion— The colored particle dispersion is obtained by dispersing colored particles containing the oil-soluble dye and the oil-soluble polymer in the aqueous medium.

The oil-soluble polymer is not particularly limited and can be appropriately selected from conventionally known ones. Examples thereof include vinyl polymers, condensation polymers (polyurethane,
Polyester, polyamide, polyurea, polycarbonate) and the like.

The oil-soluble polymer may be any of a water-insoluble type, a water-dispersible (self-emulsifying) type, and a water-soluble type. The type is preferred.

The water-dispersible polymer may be any of an ionic polymer, a nonionic dispersible group-containing polymer, and a mixed polymer thereof.

Examples of the ionic polymer include a polymer having a cationic group such as a tertiary amino group and a polymer having an anionic dissociable group such as a carboxylic acid and a sulfonic acid. Examples of the nonionic dispersible group-containing polymer include a polymer containing a nonionic dispersible group such as a polyethyleneoxy group. Among these, from the viewpoint of dispersion stability of the colored fine particles, an ionic polymer containing an anionic dissociable group, a nonionic dispersible group-containing polymer, and a mixed polymer thereof are preferable.

The monomers forming the vinyl polymer include, for example, acrylates and methacrylates (ester groups are ester groups of an alkyl group and an aryl group which may have a substituent,
Examples of the alkyl group and the aryl group include methyl, ethyl, n-butyl, sec-butyl, tert-butyl, hexyl, 2-ethylhexyl, tert-octyl, 2-chloroethyl, cyanoethyl, 2-acetoxyethyl, and tetrahydrofurfuryl. , 5-hydroxypentyl, cyclohexyl, adamantyl, norbornyl,
Benzyl, hydroxyethyl, 3-methoxybutyl, 2
-(2-methoxyethoxy) ethyl, 1,1,2,2
Vinyl esters such as -tetrafluoroethyl, perfluorodecyl, phenyl, 2,4,5-trimethylphenyl, and 4-chlorophenyl).

The vinyl esters include, for example,
Aliphatic carboxylic acid vinyl ester (specifically, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl caproate, vinyl chloroacetate, etc.), aromatic carboxylic acid vinyl ester (specifically, Include vinyl benzoate, vinyl 4-methylbenzoate, vinyl salicylate, etc.), and these may have a substituent.

The other monomers forming the vinyl polymer include, for example, acrylamides, methacrylamides, olefins and other monomers.

Examples of the acrylamides include acrylamide, N-monosubstituted acrylamide,
N, N-disubstituted acrylamide (as the substituent, an alkyl group, an aryl group, a silyl group, and the like, for example, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a tert- Butyl group, tert-
Octyl, cyclohexyl, adamantyl, norbornyl, benzyl, hydroxymethyl, ethoxyethyl, phenyl, 2,4,5-tetramethylphenyl, 4-chlorophenyl, trimethylsilyl, and further substituents May be provided. ), And the like.

Examples of the methacrylamides include methacrylamide, N-monosubstituted methacrylamide, N, N-disubstituted methacrylamide (for example, methyl, ethyl, n- Propyl, isopropyl, n-butyl, tert-butyl, t
ert-octyl group, cyclohexyl group, adamantyl group, norbornyl group, benzyl group, hydroxymethyl group, ethoxyethyl group, phenyl group, 2,4,5-trimethylphenyl group, 4-chlorophenyl group, trimethylsilyl group, which are further substituted It may have a group. ), And the like.

Examples of the olefins include olefins (eg, ethylene, propylene, 1-pentene, vinyl chloride, vinylidene, isoprene, chloroprene, butadiene) and styrenes (eg, styrene, methylstyrene, isopropylstyrene, methoxystyrene, Acetoxystyrene, chlorostyrene), vinyl ethers (eg, methyl vinyl ether, butyl vinyl ether, hexyl vinyl ether, methoxyethyl vinyl ether) and the like.

Examples of the other monomers include crotonic esters, itaconic esters, maleic esters, fumaric esters, methyl vinyl ketone, phenyl vinyl ketone, methoxyethyl vinyl ketone, N
-Vinyloxazolidone, N-vinylpyrrolidone, vinylidene chloride, methylenemalononitrile, vinylidene, diphenyl-2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, dibutyl-2-acryloyloxyethyl phosphate, dioctyl-2-methacryloyl Oxyethyl phosphate, and the like.

Examples of the monomer having an ionic group include a monomer having an anionic group and a monomer having a cationic group. Examples of the monomer having an anionic dissociable group include a carboxylic acid monomer, a sulfonic acid monomer, and a phosphoric acid monomer.

Examples of the carboxylic acid monomer include acrylic acid, methacrylic acid, maleic acid itaconic acid, fumaric acid, citraconic acid, crotonic acid and monoalkyl itaconate (eg, monomethyl itaconate, monoethyl itaconate, monobutyl itaconate). And monoester maleate (for example, monomethyl maleate, monoethyl maleate, monobutyl maleate), and the like.

Examples of the sulfonic acid monomer include styrene sulfonic acid, vinyl sulfonic acid, acryloyloxyalkanesulfonic acid (for example, acryloyloxyethanesulfonic acid, acryloyloxypropanesulfonic acid), and methacryloyloxyalkanesulfonic acid (for example, methacryloyl). Oxyethanesulfonic acid,
Methacryloyloxypropanesulfonic acid), acrylamidoalkanesulfonic acid (for example, 2-acrylamido-2-methylethanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid), methacrylamidoalkanesulfonic acid (for example, 2-methacrylamide-)
2-methylethanesulfonic acid, 2-methacrylamide-
2-methylpropanesulfonic acid, 2-methacrylamide-2-methylbutanesulfonic acid) and the like.

Examples of the phosphoric acid monomer include vinyl phosphonic acid and methacryloyloxyethyl phosphonic acid.

Among these, acrylic acid, methacrylic acid, styrene sulfonic acid, vinyl sulfonic acid, acrylamide alkyl sulfonic acid and methacrylamide alkyl sulfonic acid are preferred as the monomer having an anionic group, and acrylic acid, methacrylic acid Styrenesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, and 2-acrylamido-2-methylbutanesulfonic acid are more preferred.

Examples of the monomer having a cationic group include monomers having a tertiary amino group such as dialkylaminoethyl acrylate and dialkylaminoethyl methacrylate.

Examples of the monomer having a nonionic dispersing group include esters of polyethylene glycol monoalkyl ether and carboxylic acid monomer, esters of polyethylene glycol monoalkyl ether and sulfonic acid monomer, and polyethylene glycol monoalkyl. Examples include esters of ether and phosphoric acid monomers, urethanes containing vinyl groups formed from polyethylene glycol monoalkyl ether and monomers containing isocyanate groups, macromonomers containing a polyvinyl alcohol structure, and the like. The number of repeating ethyleneoxy units of the polyethylene glycol monoalkyl ether is preferably from 8 to 50, and more preferably from 10 to 30. The number of carbon atoms of the alkyl group of the polyethylene glycol monoalkyl ether is preferably from 1 to 20, and more preferably from 1 to 12.

Next, the condensation polymer will be described in detail. The polyurethane is basically synthesized by a polyaddition reaction using a diol compound and a diisocyanate compound as raw materials. Specific examples of the diol compound, as a non-dissociable diol, ethylene glycol,
1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 2,3-butanediol, 2,2, -dimethyl-1,3-propanediol,
1,4-pentanediol, 2,4-pentanediol, 3,3-dimethyl-1,2-butanediol, 2-
Ethyl-2-methyl-1,3-propanediol, 1,
6-hexanediol, 2,5-hexanediol, 2
-Methyl-2,4-pentanediol, 2,2-diethyl-1,3-propanediol, 2,4-dimethyl-
2,4-pentanediol, 2-methyl-2-propyl 1,3-propanediol, 2,5-dimethyl-2,5
-Hexanediol, 2-ethyl-1,3-hexanediol, 1,2-octanediol, 2,2,4-trimethyl-1,3-pentanediol, 1,4-cyclohexanedimethanol, diethylene glycol, triethylene glycol , Dipropylene glycol, tripropylene glycol, polyethylene glycol (average molecular weight = 200, 300, 400, 600, 1000, 150
0, 4000), polypropylene glycol (average molecular weight = 200, 400, 1000), polyester polyol, 4,4′-dihydroxy-diphenyl-2,2-
And propane and 4,4-dihydroxyphenylsulfone.

Examples of the diol compound having an anionic group include 2,2-bis (hydroxymethyl) propionic acid, 2,2-bis (hydroxymethyl) butanoic acid,
2,5,6-trimethoxy-3,4-dihydroxyhexanoic acid, 2,3-dihydroxy-4,5-dimethoxypentanoic acid, 2,4-di (2-hydroxy) ethyloxycarbonylbenzenesulfonic acid, and these Examples thereof include salts, but are not particularly limited thereto.

Preferred examples of the diisocyanate compound include ethylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate,
1,4-cyclohexane diisocyanate, 2,4-toluene diisocyanate, 1,3-xylene diisocyanate, 1,5-naphthalene diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 3,3′-dimethyl-4,4′- Examples include diphenylmethane diisocyanate, 3,3′-dimethylbiphenylene diisocyanate, dicyclohexylmethane diisocyanate, and methylene bis (4-cyclohexyl isocyanate).

The above-mentioned polyester is basically easily synthesized by dehydration condensation from a diol compound and a dicarboxylic acid compound.

Specific examples of the dicarboxylic acid compound include oxalic acid, malonic acid, succinic acid, glutaric acid, dimethylmalonic acid, adipic acid, pimelic acid, α, α-dimethylsuccinic acid, acetonedicarboxylic acid, sebacic acid,
1,9-nonanedicarboxylic acid, fumaric acid, maleic acid,
Itaconic acid, citraconic acid, phthalic acid, isophthalic acid,
Terephthalic acid, 2-butylterephthalic acid, tetrachloroterephthalic acid, acetylenedicarboxylic acid, poly (ethylene terephthalate) dicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, ω-poly (ethyleneoxy) dicarboxylic acid Acids, p-xylylenedicarboxylic acid, and the like. These compounds may be used in the form of an alkyl ester of a carboxylic acid (for example, dimethyl ester) or an acid chloride of a dicarboxylic acid when performing polycondensation with the diol compound,
It may be used in the form of an acid anhydride such as maleic anhydride, succinic anhydride, and phthalic anhydride.

Preferred examples of the dicarboxylic acid compound having a sulfonic acid group and the diol compound include sulfophthalic acids (for example, 3-sulfophthalic acid, 4-sulfophthalic acid, 4-sulfoisophthalic acid, 5-sulfoisophthalic acid, and 2-sulfophthalic acid). Terephthalic acid, etc.), sulfosuccinic acid, sulfonaphthalenecarboxylic acids (for example, 4-sulfo-
1,8-naphthalenedicarboxylic acid, 7-sulfo-1,5
-Naphthalenecarboxylic acid, etc.), 2,4-di (2-hydroxy) ethyloxycarbonylbenzenesulfonic acid, and salts thereof.

As the diol compound, a compound selected from the same group as the diols described for the polyurethane is used. A typical synthesis method of the polyester is a condensation reaction of the diols with a dicarboxylic acid or a derivative thereof, but can also be obtained by condensing a hydroxycarboxylic acid (for example, 1,2-hydroxystearic acid or the like). Polyesters obtained by a method such as a ring-opening polymerization method of a cyclic ether and a lactone (see Lecture Polymerization Reaction 6, Ring-Opening Polymerization (I), written by Takeo Saegusa, 1971) are also included in the present invention. It is preferably used.

The polyamide can be obtained by polycondensation of a diamine compound and a dicarboxylic acid compound, polycondensation of an aminocarboxylic acid compound, ring-opening polymerization of lactams, and the like. Examples of the diamine compound include ethylenediamine, 1,3-propanediamine, 1,2-propanediamine, hexamethylenediamine, octamethylenediamine, o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, piperazine, and 2,5. -Dimethylpiperazine, 4,4'-diaminophenylether, 3,3'-diaminodiphenylsulfone, xylylenediamine and the like. As the aminocarboxylic acid, glycine, alanine, phenylalanine, ω
-Aminohexanoic acid, ω-aminodecanoic acid, ω-aminoundecanoic acid, anthranilic acid and the like. Examples of the monomer used for the ring-opening polymerization include ω-caprolactam, azetidinone, and pyrrolidone. As the dicarboxylic acid compound, a compound selected from the same group as the dicarboxylic acids described in the polyester is used.

The polyurea can be basically obtained by polyaddition of a diamine compound and a diisocyanate compound, and a deammonification reaction of the diamine compound and urea. As the diamine compound as a raw material, a compound selected from the same group as the diamines described for the polyamide can be used. As the diisocyanate compound as a raw material, a compound selected from the same group as the diisocyanates described in the polyurethane can be used.

The polycarbonate can be basically obtained by reacting a diol compound with a phosgene or carbonate derivative (for example, an aromatic ester such as diphenyl carbonate). As the diol compound as a raw material, a compound belonging to the same group as the diols described in the above polyurethane is used.

As the oil-soluble polymer, necessary constituent materials may be used one by one, or may be used for various purposes (for example, adjustment of the glass transition temperature (Tg) of the polymer, solubility, compatibility with the dye, dispersion of the polymer, etc.). , Etc.) can be used in any ratio of two or more.

Among the above oil-soluble polymers, those having the above-mentioned ionic group are preferable.
Those having at least one of a carboxyl group and a sulfonic acid group are more preferred. Those having a carboxyl group as the ionic group are particularly preferred.

After the polymerization of each of the above-mentioned polymers, an acid anhydride (for example, maleic acid) is allowed to act on a reactive group such as a hydroxy group or an amino group to introduce an ionic group by a reaction. You can also.

The content of the ionic group is from 0.1 to
3.0 mmol / g is preferred. When the content is low, the self-emulsifying property of the polymer is low, and when the content is high, the water solubility increases, and the polymer tends to be unsuitable for dispersion.

Incidentally, as the ionic group, the anionic group may further be a salt such as an alkali metal (for example, sodium or potassium) or an ammonium ion. And salts of organic acids (eg, acetic acid, propionic acid, methanesulfonic acid, etc.) and inorganic acids (eg, hydrochloric acid, sulfuric acid, phosphoric acid).

As the oil-soluble polymer, vinyl polymers, polyurethanes, polyurethanes, and the like can be used in view of imparting compatibility with the oil-soluble dye, excellent dispersion stability, and easy introduction of ionic groups. Polyester and the like are particularly preferred.

Specific Examples of the Vinyl Polymer (PA-1)
To (PA-41) are listed below. The ratios in parentheses indicate mass ratios. The present invention is not limited to these specific examples.

(PA-1) Methyl methacrylate-ethyl acrylate copolymer (50:50) (PA-2) Butyl acrylate-styrene copolymer (50:50) (PA-3) Poly n-butyl methacrylate (PA -4) polyisopropyl methacrylate (PA-5) poly (4-tert-butylphenyl acrylate (PA-6) n-butyl methacrylate-N-vinyl-
2-Pyrrolidone copolymer (90:10) (PA-7) Methyl methacrylate-vinyl chloride copolymer (70:30) (PA-8) Isobutyl methacrylate-butyl acrylate copolymer (55:45) (PA- 9) Vinyl acetate-acrylamide copolymer (8
5:15) (PA-10) n-butyl acrylate-methyl methacrylate-n-butyl methacrylate copolymer (35:
35:30) (PA-11) Ethyl methacrylate-n-butyl acrylate copolymer (70:30) (PA-12) tert-butymethacrylamide-methyl methacrylate-acrylic acid copolymer (60:30:
10) (PA-13) n-butyl acrylate-acrylic acid copolymer (80:20) (PA-14) sec-butyl acrylate-acrylic acid copolymer (85:15) (PA-15) isopropyl acrylate Acrylic acid copolymer (90:10)

(PA-16) Butyl methacrylate-2
-Hydroxyethyl methacrylate-acrylic acid copolymer (85: 5: 10) (PA-17) isobutyl methacrylate-tetrahydrofurfuryl acrylate-acrylic acid copolymer (6
0:30:10) (PA-18) n-butyl methacrylate-1H, 1
H, 2H, 2H-perfluorodecyl acrylate-acrylic acid copolymer (75: 20: 5) (PA-19) methyl methacrylate-n-butyl acrylate-acrylic acid copolymer (50: 45: 5) (PA -20) 3-methoxybutyl methacrylate-styrene-acrylic acid copolymer (35:50:15) (PA-21) ethyl acrylate-phenyl methacrylate-acrylic acid copolymer (72:25:13) (PA-22) ) Methacrylic acid ester-acrylic acid copolymer of isobutyl methacrylate-polyethylene glycol monomethyl ether (ethyleneoxy chain repeating number 23) (70:20:10) (PA-23) Ethyl methacrylate-acrylic acid copolymer (95: 5) ) (PA-24) isobutyl acrylate-methoxys Len-acrylic acid copolymer (75:15:10) (PA-25) isobutyl acrylate-N-vinylpyrrolidone-acrylic acid copolymer (60:30:10) (PA-26) 2,2,2- Tetrafluoroethyl methacrylate-methyl methacrylate-methacrylic acid copolymer (25:60:15) (PA-27) Ethyl methacrylate-2-ethoxyethyl methacrylate-methacrylic copolymer (75: 1)
5:15) (PA-28) tert-octylacrylamide-propyl methacrylate-methacrylic acid copolymer (20:
65:15) (PA-29) n-butyl methacrylate-diphenyl-2-methacryloyloxydiethylphosphonate-methacrylic acid copolymer (80: 5: 15) (PA-30) n-butyl methacrylate-phenylacrylamide-methacrylic acid Copolymer (70:15:
15)

(PA-31) n-butyl methacrylate-N-vinylpyrrolidone-methacrylic acid copolymer (7
0:15:15) (PA-32) n-butyl methacrylate-styrene sulfonic acid copolymer (90:10) (PA-33) isobutyl methacrylate-styrene sulfonic acid copolymer (90:10) (PA-34) ) N-butyl methacrylate-2-acrylamido-2-methylethanesulfonic acid copolymer (9
0:10) (PA-35) isobutyl acrylate-n-butyl methacrylate-2-acrylamido-2-methylethanesulfonic acid copolymer (70:20:10) (PA-36) ethyl acrylate-tert-butyl methacrylate- 2-acrylamido-2-methylpropanesulfonic acid copolymer (60:30:10) (PA-37) tert-butyl acrylate-tetrahydrofurfuryl acrylate-2-methylpropanesulfonic acid copolymer (50:40) : 10)) (PA-38) Methacrylic acid ester-2-acrylamido-2-methylpropanesulfonic acid copolymer of tert-butyl acrylate-polyethylene glycol monomethyl ether (ethyleneoxy chain repeating number 23) (60:30:10) (PA-39) Butyl acrylate-N-vinylpyrrolidone-2-acrylamido-2-methylpropanesulfonic acid copolymer (60:30:10) (PA-40) n-butylmethacrylate-2-acrylamido-2-methylpropanesulfonic acid sodium copolymer Polymer (98:12) (PA-41) n-butyl methacrylate-tert-
Butyl methacrylate-2-acrylamide-2-methylbutanesulfonic acid sodium copolymer (50: 35: 1)
5)

Specific Examples of the Condensed Polymer (PC-1)
(PC-21) is illustrated below in the form of a raw material monomer (however, PC-17 and thereafter are illustrated in the form of a polymer), but the present invention is not limited thereto.
All acidic groups in each polymer are represented in non-dissociated form.
Regarding those produced by condensation reaction of polyesters, polyamides, etc., the constituent components are all expressed as dicarboxylic acids, diols, diamines, hydroxycarboxylic acids, aminocarboxylic acids, etc., regardless of the raw materials. The ratio in parentheses means the molar percentage ratio of each component.

(PC-1) Toluene diisocyanate /
Ethylene glycol / 1,4-butanediol (50 /
(PC-2) Toluediisocyanate / hexamethylene diisocyanate / ethylene glycol / polyethylene glycol (Mw = 600) 1,4-butanediol (40/20/10/20) (PC-3) 4,4 ' -Diphenylmethane diisocyanate / hexamethylene diisocyanate / tetraethylene glycol / ethylene glycol / 2,2-bis (hydroxymethyl) propionic acid (40/10/20/2)
0/10) (PC-4) 1,5-naphthalenediisocyanate / butanediol / 4,4'-dihydroxy-diphenyl-
2,2'-propane / polypropylene glycol (Mw
= 400) / 2,2-bis (hydroxymethyl) propionic acid (50/20/5/10/15) (PC-5) isophorone diisocyanate / diethylene glycol / neopentyl glycol / 2,2-bis (hydroxymethyl) propion Acid (50/20/20
/ 10) (PC-6) diphenylmethane diisocyanate / hexamethylene diisocyanate / tetraethylene glycol / butanediol / 2,4-di (2-hydroxy) ethyloxycarbonylbenzenesulfonic acid (40/10
(PC-7) terephthalic acid / isophthalic acid / cyclohexanedimethanol / 1,4-butanediol / ethylene glycol (25/25/25/15/10) (PC-8) terephthalic acid / Isophthalic acid / 4,4'-
Dihydroxy-diphenyl-2,2-propane / tetraethylene glycol / ethylene glycol (30/20
/ 20/15/15 /) (PC-9) Terephthalic acid / isophthalic acid / 4,4'-
Benzenedimethanol / diethylene glycol / neopentyl glycol (25/25/25/15/10) (PC-10) Terephthalic acid / isophthalic acid / 5-sulfoisophthalic acid / ethylene glycol / neopentyl glycol (24/24/2 / 25/25) (PC-11) 11-aminoundecanoic acid (100) Reaction product of (PC-12) poly (12-aminododecanoic acid) and maleic anhydride (PC-13) hexamethylenediamine / adipic acid ( (PC-14) N, N-dimethylethylenediamine / adipic acid / cyclohexanedicarboxylic acid (50/20 /
30) (PC-15) Toluene diisocyanate / 4,4'-
Diphenylmethane diisocyanate / hexamethylenediamine (30/20/50) (PC-16) hexamethylenediamine / nonamethylenediamine / urea (25/25/50)

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The molecular weight (Mw) of the oil-soluble polymer is usually from 1,000 to 200,000,
50,000 is preferred. When the molecular weight is less than 1,000, it tends to be difficult to obtain a stable colored fine particle dispersion, and when the molecular weight exceeds 200,000, the solubility in an organic solvent becomes poor, or the viscosity of the organic solvent solution increases. Tends to be difficult to disperse.

Next, the preparation of the colored fine particle dispersion will be described. The colored fine particle dispersion can be produced by dispersing the oil-soluble dye and the oil-soluble polymer in an aqueous medium (a liquid containing at least water) in the form of colored fine particles. For example, a method in which a latex of the oil-soluble polymer is prepared in advance and the oil-soluble dye is impregnated in the latex, or a coemulsification dispersion method is used. Among these, the co-emulsification dispersion method is preferable. As the co-emulsification dispersion method, by adding water to an organic solvent containing the oil-soluble polymer and the oil-soluble dye, and, by adding the organic solvent to water, the organic solvent by A method of emulsifying and forming fine particles is more preferable.

The latex means a substance in which the oil-soluble polymer insoluble in water is dispersed as fine particles in an aqueous medium. As the dispersion state, the oil-soluble polymer is emulsified in the aqueous medium,
Any of emulsion-polymerized products, micelle-dispersed products, those in which the oil-soluble polymer has a partially hydrophilic structure in the molecule, and the molecular chains themselves are molecularly dispersed may be used.

Here, a method of preparing the polymer latex in advance and impregnating the polymer latex with the oil-soluble dye will be described. As a first example of this method, a first step of preparing a polymer latex, a second step of preparing a dye solution in which the oil-soluble dye is dissolved in an organic solvent, and the dye solution and the polymer latex Mixing to prepare a colored fine particle dispersion. As a second example of this method, a first step of preparing a polymer latex, a dye solution in which the oil-soluble dye is dissolved in an organic solvent is prepared, and the dye solution is mixed with a liquid containing at least water. And a third step of mixing the polymer latex and the dye fine particle dispersion to prepare a colored fine particle dispersion. As a third example of this method, there is a method described in JP-A-55-139471.

Here, the emulsification and dispersion method will be described. A first example of this method includes a first step of preparing a solution in which the oil-soluble dye and the oil-soluble polymer are dissolved in an organic solvent, and a solution containing the polymer and the organic solvent solution containing the dye and at least water. Mixing to prepare a colored fine particle dispersion. A second example of this method is a first step of preparing a dye solution in which the oil-soluble dye is dissolved in an organic solvent, and a second step of preparing a polymer solution in which an oil-soluble polymer is dissolved in an organic solvent, A third step of preparing a colored fine particle dispersion by mixing the dye solution, the polymer solution, and a liquid containing at least water. A third example of this method is a first step of preparing a dye solution in which the oil-soluble dye is dissolved in an organic solvent, and mixing the dye solution with a liquid containing at least water to prepare a dye fine particle dispersion. Dissolving an oil-soluble polymer in an organic solvent to prepare a polymer solution, mixing the polymer solution with a liquid containing at least water to prepare a polymer fine particle dispersion, and the dye fine particle dispersion the polymer A third step of preparing a colored fine particle dispersion by mixing with a fine particle dispersion. A fourth example of this method is a first step of preparing a dye solution in which the oil-soluble dye is dissolved in an organic solvent, and mixing the dye solution and a liquid containing at least water to prepare a dye fine particle dispersion. And a second step of preparing a polymer solution in which an oil-soluble polymer is dissolved in an organic solvent, and a third step of mixing the dye fine particle dispersion and the polymer solution to prepare a colored fine particle dispersion . A fifth example of this method includes a step of directly mixing the oil-soluble dye and the oil-soluble polymer with a liquid containing at least water to prepare a colored fine particle dispersion.

The amount of the oil-soluble polymer used in the colored fine particle dispersion is preferably from 10 to 1,000 parts by mass, more preferably from 50 to 6 parts by mass, per 100 parts by mass of the oil-soluble dye.
00 parts by mass is more preferred. The amount of the polymer used is
If it is less than 10 parts by mass, fine and stable dispersion tends to be difficult, and if it exceeds 1000 parts by mass, the proportion of the oil-soluble dye in the colored fine particle dispersion is reduced, and the colored fine particle dispersion is used as an aqueous ink. When used, there is a tendency that there is no room in the formulation design.

The organic solvent used for producing the colored fine particle dispersion is not particularly limited, and can be appropriately selected based on the solubility of the oil-soluble dye or the oil-soluble polymer. Examples of the organic solvent include ketone solvents such as acetone, methyl ethyl ketone, diethyl ketone, and cyclohexanone, methanol, ethanol,
-Propanol, 1-propanol, 1-butanol,
alcohol solvents such as tert-butanol; chlorine solvents such as chloroform and methylene chloride; aromatic solvents such as benzene and toluene; ester solvents such as ethyl acetate, butyl acetate and isopropyl acetate; diethyl ether; tetrahydrofuran; And glycol-based solvents such as ethylene glycol monomethyl ether and ethylene glycol dimethyl ether. The organic solvent may be used alone or in combination of two or more, and may be a mixed solvent with water.

The use amount of the organic solvent is not particularly limited as long as the effect of the present invention is not impaired.
10 to 200 with respect to 100 parts by mass of the oil-soluble polymer.
0 mass parts is preferable and 100-1000 mass parts is more preferable. When the amount of the organic solvent used is 10 parts by mass or less, fine and stable dispersion of the colored fine particles tends to be difficult, and when the amount exceeds 2,000 parts by mass, the solvent removal for removing the organic solvent and The step of concentration becomes indispensable and complicated, and there is a tendency that there is no room in the formulation design.

When the solubility of the organic solvent in water is 10% or less, or when the vapor pressure of the organic solvent is higher than water, the organic solvent is removed from the viewpoint of the stability of the colored fine particle dispersion. Preferably. The removal of the organic solvent can be performed at 10 ° C to 100 ° C under normal pressure to reduced pressure conditions, and performed at 40 ° C to 100 ° C under normal pressure conditions or 10 ° C to 50 ° C under reduced pressure conditions.
preferable.

The colored fine particle dispersion may contain an additive appropriately selected according to the purpose. Examples of the additive include a neutralizer, a dispersant, a dispersion stabilizer, and a high-boiling organic solvent described below.

When the oil-soluble polymer has an unneutralized ionic group, the neutralizing agent may be used for adjusting the pH of the colored fine particle dispersion, adjusting the self-emulsifying property, imparting dispersion stability, and the like. Can be used in respect. The neutralizing agent may be added at the time of taking out as a polymer before preparing the dispersion, or may be added at any step of performing the dispersion or after the completion of the dispersion. Examples of the neutralizing agent include an organic base (for example, triethanolamine, diethanolamine, N-methyldiethanolamine, dimethylethanolamine, etc.) and an inorganic alkali (for an alkali metal hydroxide, , Sodium hydroxide, lithium hydroxide, potassium hydroxide, etc., and carbonates such as, for example, sodium carbonate, sodium hydrogen carbonate, etc.), and ammonia. For the cationic group, organic acids (for example, oxalic acid, formic acid, acetic acid, methanesulfonic acid, paratoluenesulfonic acid, etc.),
Inorganic acids (for example, hydrochloric acid, phosphoric acid, sulfuric acid) and the like can be mentioned. From the viewpoint of improving the dispersion stability of the colored fine particle dispersion, the neutralizing agent is preferably added so as to have a pH of 4.5 to 10.0, and added so as to have a pH of 6.0 to 10.0. Is more preferred.

The dispersant and the dispersion stabilizer may be added to any of the polymer latex, the oil-soluble polymer solution, the dye solution, a solution containing at least water, and the like. It is preferably added to the oil-soluble polymer, the dye solution, and the solution containing water in the previous step of preparing the solution. Examples of the dispersant and the dispersion stabilizer include cationic, anionic, and nonionic surfactants, and water-soluble or water-dispersible low-molecular compounds and oligomers. The addition amount of the dispersant and the dispersion stabilizer is preferably 0 to 100% by mass, and more preferably 0 to 20% by mass of the total of the oil-soluble dye and the oil-soluble polymer.
Is more preferred.

The amount of the high boiling organic solvent is preferably 1 to 1000% by mass, more preferably 10 to 400% by mass of the oil-soluble dye. The high boiling point organic solvent may be used alone or in combination of two or more.

The content of the colored fine particles in the colored fine particle dispersion is preferably from 1 to 45% by mass,
0 mass% is more preferable. The content is diluted, evaporated,
It can be adjusted appropriately by ultrafiltration or the like. The average particle size of the colored fine particles is preferably from 1 to 500 nm, more preferably from 3 to 300 nm. There are no particular restrictions on the particle size distribution, but even those with a broad particle size distribution,
It may have a monodisperse particle size distribution. The particle size and the particle size distribution can be adjusted by means such as centrifugation and filtration.

-Dye Dispersion-The dye dispersion is obtained by dispersing the oil-soluble dye dissolved in a high boiling point organic solvent in an aqueous medium. The boiling point of the high-boiling organic solvent needs to be 150 ° C. or higher, preferably 170 ° C. or higher. The high boiling point organic solvent must have a dielectric constant of 3 to 12,
To 10 are preferred. The dielectric constant here indicates a relative dielectric constant at 25 ° C. in a vacuum.

The organic solvent having a high boiling point is not particularly limited and may be appropriately selected depending on the intended purpose.
Compounds described in U.S. Pat. No. 2,322,027 are exemplified, and high-boiling organic solvents such as phosphoric acid esters, fatty acid esters, phthalic acid esters, benzoic acid esters, phenols, and amides are preferable. .

As the high boiling organic solvent, the following formula [S
Compounds represented by [-1] to [S-9] are particularly preferred.

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In the formula [S-1], R ³⁰ , R ³¹ and R ³² each independently represent an aliphatic group or an aryl group. A, b and c each independently represent 0 or 1.

In the above formula [S-2], R ³³ and R ³⁴
Each independently represents an aliphatic group or an aryl group. R ³⁵
Represents a halogen atom (F, Cl, Br, the same applies hereinafter), an alkyl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group or an aryloxycarbonyl group. d represents an integer of 0 to 3. When d is plural, plural R ³⁵ may be the same or different.

In the above formula [S-3], Ar represents an aryl group. e represents an integer of 1 to 6. R ³⁶ is e
And a hydrocarbon group bonded to each other by a valence hydrocarbon group or an ether bond.

In the formula [S-4], R ³⁷ represents an aliphatic group. f represents an integer of 1 to 6. R ³⁸ represents a f-valent hydrocarbon group or a hydrocarbon group bonded to each other by an ether bond.

In the above formula [S-5], g is 2 to 6
Represents an integer. R ³⁹ represents a g-valent hydrocarbon group (excluding an aryl group). R ⁴⁰ represents an aliphatic group or an aryl group.

In the formula [S-6], R ⁴¹ , R ⁴² and R ⁴³ each independently represent a hydrogen atom, an aliphatic group or an aryl group. X is, -CO- or SO ₂ - represents a.
R ⁴¹ and R ⁴² or R ⁴² and R ⁴³ may be bonded to each other to form a ring.

In the formula [S-7], R ⁴⁴ represents an aliphatic group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an aryl group or a cyano group. R ⁴⁵ represents a halogen atom, an aliphatic group, an aryl group, an alkoxy group or an aryloxy group. h represents an integer of 0 to 3. When h is plural, plural R ⁴⁵ may be the same or different.

In the above formula [S-8], R ⁴⁶ and R ⁴⁷
Each independently represents an aliphatic group or an aryl group. R ⁴⁸
Represents a halogen atom, an aliphatic group, an aryl group, an alkoxy group or an aryloxy group. i represents an integer of 0 to 4. When i is plural, plural R ⁴⁸ may be the same or different.

In the above formula [S-9], R ⁴⁹ and R ⁵⁰
Represents an aliphatic group or an aryl group. j represents 1 or 2.

In the formulas [S-1] to [S-9],
When R ^{30 to} R ³⁵ , R ³⁷ , and R ^{40 to} R ⁵⁰ are an aliphatic group or a group containing an aliphatic group, the aliphatic group may be linear, branched, or cyclic. And may contain an unsaturated bond, and may have a substituent. Examples of the substituent include a halogen atom, an aryl group, an alkoxy group, an aryloxy group, an alkoxycarbonyl group, a hydroxyl group, an acyloxy group, an epoxy group and the like.

In the formulas [S-1] to [S-9],
When R ^{30 to} R ³⁵ , R ³⁷ , and R ^{40 to} R ⁵⁰ are a cyclic aliphatic group, that is, a cycloalkyl group or a group containing a cycloalkyl group, the cycloalkyl group has 3 to 8 members. The ring may contain an unsaturated bond, and may have a substituent or a crosslinking group. Examples of the substituent include a halogen atom, an aliphatic group, a hydroxyl group, an acyl group, an aryl group, an alkoxy group, an epoxy group, and an alkyl group. Examples of the cross-linking group include a methylene group and an ethylene group. ,
And an isopropylidene group.

In the formulas [S-1] to [S-9],
When R ^{30 to} R ³⁵ , R ³⁷ , and R ^{40 to} R ⁵⁰ are an aryl group or a group containing an aryl group, the aryl group may be a halogen atom, an aliphatic group, an aryl group, an alkoxy group, an aryloxy group, an alkoxy group. It may be substituted with a substituent such as a carbonyl group.

In the formulas [S-3], [S-4] and [S-5], when R ³⁶ , R ³⁸ or R ³⁹ is a hydrocarbon group, the hydrocarbon group is It may contain a cyclic structure (for example, a benzene ring, a cyclopentane ring, or a cyclohexane ring) or an unsaturated bond, and may have a substituent. Examples of the substituent include a halogen atom, a hydroxyl group, an acyloxy group, an aryl group, an alkoxy group, an aryloxy group, an epoxy group, and the like.

Next, particularly preferred high-boiling organic solvents in the present invention will be described.

In the above formula [S-1], R ³⁰ , R ³¹ and R ^{32 each} represent an aliphatic group having 3 to 24 (preferably 4 to 18) carbon atoms (hereinafter abbreviated as C number). Butyl group,
2-ethylhexyl group, 3,3,5-trimethylhexyl group, n-dodecyl group, n-octadecyl group, benzyl group, oleyl group, 2-chloroethyl group, 2,3-dichloropropyl group, 2-butoxyethyl group, 2-phenoxyethyl group, cyclopentyl group, cyclohexyl group, 4-
a t-butylcyclohexyl group, a 4-methylcyclohexyl group) or an aryl group having a C number of 6 to 24 (preferably 6 to 18) (for example, phenyl, cresyl, p-nonylphenyl, xicicle, cumenyl, p-methyl); Methoxyphenyl group, p-methoxycarbonylphenyl group).
a, b and c are each independently 0 or 1, and preferably all 1.

In the above formula [S-2], R ³³ and R ³⁴
Is an aliphatic group having 4 to 24 (preferably 4 to 18) C atoms (for example, the same group as the alkyl group mentioned for R ³⁰ above)
Ethoxycarbonylmethyl group, 1,1-diethylpropyl group, 2-ethyl-1-methylhexyl group, cyclohexylmethyl group, 1-ethyl-1,5-dimethylhexyl group, 3,5,5-trimethylcyclohexyl group, 1 -Methylcyclohexyl group) or an aryl group having 6 to 24 (preferably 6 to 18) C atoms (for example, the aryl group described for R ³⁰ , 4-t-butylphenyl group, 4-t-octylphenyl group, 3,5-trimethylphenyl group, 2,4, -di-t-butylphenyl group, 2,4,-
Di-t-pentylphenyl group). R ³⁵ represents a halogen atom (preferably Cl), an alkyl group having 1 to 18 C atoms (eg, a methyl group, an isopropyl group, a t-butyl group,
-Dodecyl group), an alkoxy group having 1 to 18 carbon atoms (for example, methoxy group, n-butoxy group, n-octyloxy group,
Methoxyethoxy group, benzyloxy group), C number 6-1
8 aryloxy group (for example, phenoxy group, p-tolyloxy group, 4-methoxyphenoxy group, 4-t-butylphenoxy group) or C2-C19 alkoxycarbonyl group (for example, methoxycarbonyl group, n-butoxycarbonyl group) , 2-ethylhexyloxycarbonyl group)
Or an aryloxycarbonyl group having 6 to 25 C atoms. d is 0 or 1.

In the formula [S-3], Ar represents an aryl group having a C number of 6 to 24 (preferably 6 to 18) (eg, phenyl, 4-chlorophenyl, 4-methoxyphenyl, 1-naphthyl) , 4-n-butoxyphenyl group, 1,3,5-trimethylphenyl group), b is an integer of 1 to 4 (preferably 1 to 3), and R ³⁶ is e
A C 2 to C 24 (preferably 2 to 18) hydrocarbon group [e.g., the alkyl group, cycloalkyl group, aryl group,-(CH ₂ ) _2- , and the following groups described for R ³³ ,

[0144]

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Or a hydrocarbon group bonded to each other by an e-valent ether bond having 4 to 24 (preferably 4 to 18) carbon atoms [for example, -CH ₂ CH ₂ OCH ₂ CH _2- , -CH ₂
CH ₂ (OCH ₂ CH ₂ ) ₃ —, —CH ₂ CH ₂ CH ₂ OCH ₂
CH ₂ CH ₂ — and the following groups are further exemplified.

[0146]

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In the formula [S-4], R ³⁷ represents an aliphatic group having 3 to 24 (preferably 3 to 17) C atoms (for example, n
-Propyl group, 1-hydroxyethyl group, 1-ethylpentyl group, n-undecyl group, pentadecyl group, 8,9
-Epoxyheptadecyl group, cyclopropyl group, cyclohexyl group, 4-methylcyclohexyl group), and f
Is an integer of 1 to 4 (preferably 1 to 3);
³⁸ is a f-valent hydrocarbon group having 2 to 24 (preferably 2 to 18) carbon atoms or a c-valent hydrocarbon group having 4 to 24 (preferably 4 to 24 carbon atoms).
To 18) is a hydrocarbon group linked to each other by an ether bond therein (for example, the same as described as R ³⁶ group).

In the formula [S-5], g is 2 to 4
(Preferably 2 or 3) and R ³⁹Is a g-valent hydrocarbon
Element group [for example, -CH_Two-,-(CH_Two)_Two-,-(C
H_Two)_Four-,-(CH_Two)₇-, Further includes the following groups:
You.

[0149]

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R ⁴⁰ has a C number of 4 to 24 (preferably 4 to 1).
8) an aliphatic group or a C number of 6 to 24 (preferably 6 to 1);
Aryl groups of 8) (e.g., an aliphatic group as described as R ^33, an aryl group).

In the formula [S-6], R ⁴¹ represents an aliphatic group having 3 to 20 carbon atoms [eg, n-propyl, 1-ethylpentyl, n-undecyl, n-pentadecyl, 2 , 4-di-t-pentylphenoxymethyl group, 4
-T-octylphenoxymethyl group, 3- (2,4-di-t-butylphenoxy) propyl group, 1- (2,4-
A di-t-butylphenoxy) propyl group, a cyclohexyl group, 4-methylcyclohexyl) or an aryl group having a C number of 6 to 24 (preferably 6 to 18) (for example, the aryl groups mentioned above for Ar). R ⁴² and R ^{43 each} represent an aliphatic group having a C number of 3 to 24 (preferably 3 to 18) (eg, isopropyl, n-butyl, n-hexyl, 2-ethylhexyl, n-dodecyl, cyclopentyl) ,
Cyclopropyl group) or 6 to 18 carbon atoms (preferably 6 to 18 carbon atoms)
15) aryl groups (for example, phenyl group, 1-naphthyl group, p-tolyl group). R ⁴² and R ⁴³ may be bonded to each other to form a pyrrolidine ring, piperidine ring, or morpholine ring together with N, or R ⁴¹ and R ⁴² may be bonded to each other to form a pyrrolidone ring. X is -CO- or S
Represents O ₂ , preferably -CO-.

In the above formula [S-7], R ⁴⁴ is an aliphatic group having 3 to 24 (preferably 3 to 18) C atoms (eg, isopropyl, t-butyl, t-pentyl, t-hexyl). Group, t-octyl group, 2-butyl group, 2-hexyl group, 2-octyl group, 2-dodecyl group, 2-hexadecyl group, t-pentadecyl group, cyclopentyl group, cyclohexyl group), C number 5 to 24 ( (Preferably 5 to 17)
(E.g., n-butoxycarbonyl group, 2-ethylhexyloxycarbonyl group, n-
Dodecyloxycarbonyl group) an alkylsulfonyl group having 3 to 24 (preferably 3 to 18) C atoms (for example, an n-butylsulfonyl group or an n-dodecylsulfonyl group);
To 30 (preferably 6 to 24) arylsulfonyl groups (for example, p-tolylsulfonyl group, p-dodecylphenylsulfonyl group, p-hexadecyloxyphenylsulfonyl group), and a C number of 6 to 32 (preferably 6 to 24) (For example, a phenyl group and a p-tolyl group) or a cyano group.

R ⁴⁵ is a halogen atom (preferably C
l) a C number of 3 to 24 (preferably an alkyl group (e.g., alkyl groups as described as R ⁴⁴ 3 to 18)), cycloalkyl group having a C number of 5 to 17 (e.g. cyclopentyl, cyclohexyl), C Number 6 to 32 (preferably 6
To 24) aryl group (for example, phenyl group, p-tolyl group) and C1 to 24 (preferably 1 to 18) alkoxy group (for example, methoxy group, n-butoxy group, 2-ethylhexyloxy group, benzyloxy group) , N-dodecyloxy group, n-hexadecyloxy group) or C 6-32
(Preferably 6 to 24) aryloxy group (for example, phenoxy group, pt-butylphenoxy group, pt-octylphenoxy group, m-pentadecylphenoxy group,
p-dodecyloxyphenoxy group), and h is 1 to
It is an integer of 2.

In the above formula [S-8], R ⁴⁶ and R ⁴⁷
, Which are the same as R ⁴² and R ^43, R ⁴⁸ are as defined above R ^45.

In the above formula [S-9], R ⁴⁹ and R ⁵⁰
Is the same as the R ^30, R ³¹ and R ^32. j represents 1 or 2, and 1 is preferable.

The following are specific examples of the high-boiling point organic solvent (S-1 to 23 as the compound represented by the above [S-1],
S-24 to S-3 as the compound represented by the above [S-2]
9. S-40 as a compound represented by the above [S-3]
To 44, S- as a compound represented by the above [S-4]
45 to 50; S-51 to S-58 as the compound represented by the above [S-5]; S-59 to 67 as the compound represented by the above [S-6]; S-68 to 75 as a compound represented by the formula, S-76 to 79 as a compound represented by the above [S-8], and S-80 to 81 as a compound represented by the above [S-9] Is shown.

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[0158]

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[0159]

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[0160]

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[0161]

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[0162]

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[0163]

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[0164]

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[0165]

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[0166]

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[0167]

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These high boiling organic solvents may be used alone or in combination of two or more.
A combination of tricresyl phosphate and dibutyl phthalate, a combination of trioctyl phosphate and di (2-ethylhexyl) sebacate, and a combination of dibutyl phthalate and poly (Nt-butylacrylamide) are exemplified.

Examples of compounds other than the above high boiling organic solvents and / or methods for synthesizing these high boiling organic solvents include, for example, US Pat. Nos. 2,322,027 and
No. 2,533,514, No. 2,772,163, No. 2,835,579,
No. 3,594,171, No. 3,676,137, No. 3,689,271
No. 3,700,454, No. 3,748,141, No. 3,764,
No. 336, No. 3,765,897, No. 3,912,515, No. 3,
936,303, 4,004,928, 4,080,209, 4,127,413, 4,193,802, 4,207,393
No. 4,220,711, No. 4,239,851, No. 4,278,
No. 757, No. 4,353,979, No. 4,363,873, No. 4,
430,421, 4,430,422, 4,464,464, 4,483,918, 4,540,657, 4,684,606
No. 4,728,599, No. 4,745,049, No. 4,935,
Nos. 321 and 5,013,639, EP 276,319A, 286,253A, 289,820A, 309,158A,
309,159A, 309,160A, 509,311A, 51
No. 0,576A, East German Patent No. 147,009, No. 157,147, No. 159,573, No. 225,240A, British Patent No. 2,091,124A
No., JP-A-48-47335, JP-A-50-26530, JP-A-51-25133,
No. 51-26036, No. 51-27921, No. 51-27922, No. 51-149
028, 52-46816, 53-1520, 53-1521,
53-15127, 53-146622, 54-91325, 54-1
06228, 54-118246, 55-59464, 56-64333
No. 56-81836, No. 59-204041, No. 61-84641, No.
62-118345, 62-247364, 63-167357, 63
-214744, 63-301941, 64-9452, 64-945
No. 4, No. 64-68745, JP-A No. 1-101543, No. 1-102454
No. 2-792, No. 2-4239, No. 2-43541, No. 4-2923
No. 7, No. 4-30165, No. 4-232946, No. 4-346338, etc.

In the present invention, a low-boiling organic solvent can be used in combination with the high-boiling organic solvent. The low boiling organic solvent has a boiling point of 150 ° C. or less at normal pressure (usually, about 30 ° C.).
Organic solvents such as esters (eg, ethyl acetate, butyl acetate, ethyl propionate, β-ethoxyethyl acetate, methyl cellosolve acetate), alcohols (eg, isopropyl alcohol, n-butyl alcohol, secondary butyl) Suitable examples include alcohols), ketones (eg, methyl isobutyl ketone, methyl ethyl ketone, cyclohexanone), amides (eg, dimethylformamide, N-methylpyrrolidone), and ethers (eg, tetrahydrofuran, dioxane).

In the emulsification and dispersion, the high-boiling organic solvent is
In some cases, a mixed solvent of the high-boiling organic solvent and the low-boiling organic solvent, an oil phase in which the oil-soluble dye is dissolved,
It is performed by dispersing in an aqueous phase by the aqueous medium to form minute oil droplets (the dispersed particles) of the oil phase. For the formation of the fine oil droplets (the dispersed particles) of the oil phase, a method of adding the oil phase to the aqueous phase is generally used. However, the aqueous phase is dropped into the oil phase. A so-called phase inversion emulsification method can also be preferably used.

At the time of the emulsification and dispersion, one or both of the water phase and the oil phase may contain a surfactant, a wetting agent,
Additives such as dye stabilizers, emulsion stabilizers, preservatives and fungicides can be added as necessary.

Examples of the surfactant include a fatty acid salt, an alkyl sulfate salt, an alkylbenzene sulfonate, an alkyl naphthalene sulfonate, a dialkyl sulfosuccinate, an alkyl phosphate ester salt, a naphthalene sulfonate formalin condensate, and a polyisocyanate. Anionic surfactants such as oxyethylene alkyl sulfates,
Nonionics such as polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, glycerin fatty acid ester, and oxyethylene oxypropylene block copolymer Surfactants and SURFYNOLS (Ai) which are acetylene-based polyoxyethylene oxide surfactants
rProducts & Chemicals)
Amine oxide type amphoteric surfactants such as N, N-dimethyl-N-alkylamine oxide;
No. 157,636, pages (37) to (38), Research Disclosure No. 308119 (1989) is also preferable.

In the present invention, a water-soluble polymer can be added together with these surfactants for the purpose of stabilization immediately after emulsification. As the water-soluble polymer,
For example, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide, polyacrylic acid, polyacrylamide and copolymers thereof, and natural water-soluble polymers such as polysaccharides, casein, and gelatin are preferably exemplified.

In the case of dispersing the oil-soluble dye into an aqueous ink by the emulsification and dispersion, it is particularly important to control the particle size. In order to increase the color purity and density when an image is formed by an inkjet recording method, it is essential to reduce the average particle size of the dispersed particles in the dye dispersion, and the volume average particle size is preferably 100 nm or less, -50 nm is more preferable.

It has also been found that the presence of coarse particles plays a very important role in printing performance. That is, it has been found that the coarse particles clog the nozzles of the head or form dirt even if they are not clogged, thereby causing non-ejection of the inkjet ink and / or skew of the ejection, which has a significant effect on printing performance. In order to prevent this, it is preferable to suppress the number of particles having a size of 5 μm or more to 10 or less and the number of particles having a size of 1 μm or more to 1000 or less in 1 μl of the ink.

As a method for removing these coarse particles, a known centrifugal separation method, microfiltration method or the like can be used. These separation means may be performed immediately after emulsification and dispersion, or may be performed immediately after filling the ink cartridge after adding various additives such as a wetting agent and a surfactant to the emulsified dispersion. As an effective means for reducing the average particle size of the dispersed particles in the dye dispersion, and eliminating coarse particles,
An emulsifying and dispersing apparatus that performs mechanical stirring can be suitably used.

As the emulsifying and dispersing apparatus, known apparatuses such as a simple stirrer, an impeller stirring method, an in-line stirring method, a mill method such as a colloid mill, and an ultrasonic method can be used. Dispersing devices are preferred, and among them, a high-pressure homogenizer is particularly preferred.

The high-pressure homogenizer is US-453.
No. 3,254, JP-A-6-47264, etc., a detailed mechanism is described, but as a commercially available device, a Gaulin homogenizer (APV GAULIN INC.),
Microfluidizer (MICROFLUIDEX
INC. ), Ultimateizer (Sugino Machine Co., Ltd.) and the like.

In recent years, US Pat.
The high-pressure homogenizer having a mechanism for atomization in an ultra-high-pressure jet stream as described in the above item is particularly effective for the emulsification and dispersion of the present invention. As an example of an emulsifying and dispersing apparatus using this ultrahigh-pressure jet stream, DeBEE2000 (BE
E INTERNATIONAL LTD. ).

The pressure for emulsifying and dispersing using the high-pressure emulsifying and dispersing apparatus is preferably 50 MPa or more (500 bar or more), and is 60 MPa or more (600 bar or more).
Is more preferable, and 180 MPa or more (1800 bar or more) is still more preferable. In the present invention, it is particularly preferable to use two or more emulsifiers in combination during the emulsification and dispersion, for example, by emulsifying with a stirring emulsifier and then passing through a high-pressure homogenizer. Further, it is also preferable that the emulsion is once emulsified and dispersed by these emulsifying apparatuses, and then an additive such as a wetting agent or a surfactant is added.

If the low-boiling organic solvent is contained in addition to the high-boiling organic solvent during the emulsification and dispersion, the low-boiling solvent is substantially removed from the viewpoint of the stability and safety and health of the emulsion. Is preferred. As a method for substantially removing the low-boiling solvent, various known methods can be employed depending on the type of the low-boiling organic solvent, for example, an evaporation method, a vacuum evaporation method, an ultrafiltration method, and the like. . The step of removing the low-boiling organic solvent is preferably performed as soon as possible immediately after emulsification.

The coloring composition of the present invention can be used in various fields, and can be suitably used as an ink composition such as a water-based ink for writing, a water-based printing ink, and an ink for information recording. It can be particularly preferably used for the inkjet ink of the present invention.

(Ink Jet Ink) The ink jet ink of the present invention contains the coloring composition of the present invention, and may further contain other components appropriately selected as necessary. Examples of the other components include a drying inhibitor, a penetration enhancer, an ultraviolet absorber, an antioxidant, a fungicide, a pH adjuster, a surface tension adjuster, an antifoaming agent, a viscosity adjuster, a dispersant, and a dispersant. Known additives such as a stabilizer, a rust preventive, and a chelating agent are exemplified.

The above-mentioned anti-drying agent is suitably used for the purpose of preventing clogging due to drying of the ink at the ink ejection port of the nozzle used in the ink jet recording method. As the drying inhibitor, a water-soluble organic solvent having a lower vapor pressure than water is preferable. Specific examples of the drying inhibitor include ethylene glycol, propylene glycol, diethylene glycol, polyethylene glycol, thiodiglycol, dithioglycol, and 2-methyl-1,3-.
Polyhydric alcohols represented by propanediol, 1,2,3-hexatriol, acetylene glycol derivatives, glycerin, trimethylolpropane, etc., ethylene glycol monomethyl (or ethyl) ether, triethylene glycol monoethyl (or butyl) ether Lower alkyl ethers of polyhydric alcohols such as 2-pyrrolidone, N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, heterocycles such as N-ethylmorpholine, sulfolane, dimethyl sulfoxide; Examples include sulfur-containing compounds such as 3-sulfolene, polyfunctional compounds such as diacetone alcohol and diethanolamine, and urea derivatives. Of these, polyhydric alcohols such as glycerin diethylene glycol are more preferred. These may be used alone or in combination of two or more. These anti-drying agents are preferably contained in the ink in an amount of 10 to 50 parts by mass.

Examples of the penetration enhancer include alcohols such as ethanol, isopropanol, butanol, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether and 1,2-hexanediol, sodium lauryl sulfate, sodium oleate and the above-mentioned emulsified dispersion. Nonionic surfactants listed as surfactants for use. These have a sufficient effect if added in an amount of 10 to 30% by mass in the inkjet ink, and are added within a range that does not cause bleeding of a print or paper-through (print-through).

The above-mentioned ultraviolet absorbers are used for the purpose of improving the storability of an image and are described, for example, in JP-A-58-1856.
Nos. 77, 61-90537 and JP-A-2-
No. 782, No. 5-1970075, No. 9-34
Benzotriazole compounds described in JP-A-557 / 057, JP-A-46-2784, JP-A-5-1944
No. 83, U.S. Pat. No. 3,214,463, benzophenone-based compounds described in JP-B-48-30492, JP-B-56-21141, and JP-A-10-881.
No. 06, etc., cinnamic acid-based compounds,
298503, 8-53427 and 8-
Nos. 339368, 10-182621, and JP-A-8-501291, and the like. 2423
Compounds described in No. 9 and compounds emitting fluorescent light by absorbing ultraviolet light represented by stilbene-based and benzoxazole-based compounds, so-called fluorescent whitening agents, and the like are also included.

The antioxidant is used for the purpose of improving the storability of an image, and examples thereof include various organic and metal complex antifading agents. Examples of the organic anti-fading agent include hydroquinones, alkoxyphenols, dialkoxyphenols, phenols, anilines, amines, indans, chromans, alkoxyanilines, heterocycles, and the like. . Examples of the metal complex-based anti-fading agent include a nickel complex, a zinc complex, and the like. No. 17643, Sections VII I through J; 15162; 18716 of 65
Page 0, left column, same No. No. 36544, page 527; Three
No. 07105, page 872; The compounds described in the patent cited in US Pat.
Preferred examples include compounds included in the general formulas and compound examples of typical compounds described on pages 127 to 137 of JP-A No. 195/1992.

Examples of the antifungal agent include sodium dehydroacetate, sodium benzoate, sodium pyridinethione-1-oxide, ethyl p-hydroxybenzoate, 1,2-benzisothiazolin-3-one and salts thereof. Is mentioned. These are contained in the ink at 0.0
It is preferable to use 2 to 1.00% by mass.

Examples of the pH adjusting agent include hydroxides of alkali metals such as lithium hydroxide and potassium hydroxide, carbonates such as sodium carbonate and sodium hydrogen carbonate, and the like.
Inorganic bases such as potassium acetate, sodium silicate and disodium phosphate, and organic bases such as N-methyldiethanolamine and triethanolamine are exemplified.

Examples of the surface tension modifier include nonionic, cationic and anionic surfactants. For example, the surfactant used for the above emulsification and dispersion can be used.
Those having a solubility in water at 5 ° C. of 0.5% or more are preferred.

The dispersant and the dispersion stabilizer include:
Preferable examples include the above-mentioned cations, anions, and various nonionic surfactants. Examples of the antifoaming agent include chelating agents represented by fluorine-based and silicone-based compounds and EDTA.

The pH of the inkjet ink is preferably from 6 to 10 from the viewpoint of improving the storage stability.
7 to 10 are more preferred. The surface tension of the inkjet ink is preferably 20 to 60 mN / m,
25 to 45 mN / m is more preferred. The viscosity of the inkjet ink is preferably 30 mPa · s or less, more preferably 20 mPa · s or less. The inkjet ink of the present invention is suitably used in the following inkjet recording method of the present invention.

(Ink Jet Recording Method) In the ink jet recording method of the present invention, recording is performed on an image receiving material using the ink for ink jet of the present invention. In addition,
There are no particular restrictions on the ink nozzles and the like used at that time, and they can be appropriately selected according to the purpose.

-Image-Receiving Material- The image-receiving material is not particularly limited, and is a known recording material, that is, plain paper or resin-coated paper, for example, JP-A-8-1
Nos. 69172, 8-27693 and 2-2
Nos. 76670, 7-276789, 9-
323475, JP-A-62-28783, JP-A-10-153899, and 10-217
Nos. 473 and 10-235995 and 10-
JP-A-337947, JP-A-10-217597, and JP-A-10-337947, etc., include paper for exclusive use of ink jet, film, electrophotographic common paper, cloth, glass, metal, ceramics, and the like.

In the present invention, among the above-mentioned image receiving materials, a recording paper and a recording film having an image receiving layer on a support are particularly preferable.

Examples of the support include LBKP, NBKP
Chemical pulp, GP, PGW, RMP, TMP, CT
It consists of mechanical pulp such as MP, CMP and CGP, waste paper pulp such as DIP, etc., and if necessary, mixes known additives such as pigments, binders, sizing agents, fixing agents, cationic agents, and paper strength enhancers. However, those manufactured by various apparatuses such as a fourdrinier paper machine and a round paper machine can be used, and in addition to these, synthetic paper, plastic film sheets and the like may be used. As the thickness of the support, 10 to 250
μm, and its basis weight is 10 to 250 g /
m ² is preferred.

On the support, the image receiving layer may be provided as it is, or a back coat layer may be further provided. Also, after providing a size press or an anchor coat layer with starch, polyvinyl alcohol, or the like, An image receiving layer and a back coat layer may be provided. The support may be subjected to a flattening process using a calender such as a machine calender, a TG calender, and a soft calender.

Among the above-mentioned supports, paper and plastic films laminated on both sides with a polyolefin (for example, polyethylene, polystyrene, polyethylene terephthalate, polybutene and copolymers thereof) are more preferably used. In the polyolefin, a white pigment (eg, titanium oxide, zinc oxide) or a coloring dye (eg,
It is preferable to add cobalt blue, ultramarine blue, neodymium oxide).

The image receiving layer is provided on the support,
Contains a pigment and an aqueous binder. As the pigment, a white pigment is preferable.Examples of the white pigment include calcium carbonate, kaolin, talc, clay, diatomaceous earth, synthetic amorphous silica, aluminum silicate, magnesium silicate, calcium silicate, aluminum hydroxide, alumina, Preferable examples include inorganic pigments such as lithopone, zeolite, barium sulfate, calcium sulfate, titanium dioxide, zinc sulfide, and zinc carbonate; and organic pigments such as styrene pigment, acrylic pigment, urea resin, and melamine resin. Among these white pigments, inorganic pigments are preferable, porous inorganic pigments are more preferable, and synthetic amorphous silica having a large pore area is particularly preferable. As the synthetic amorphous silica, any of silicic anhydride obtained by a dry production method and hydrous silicic acid obtained by a wet production method can be used, but it is particularly preferable to use hydrous silicic acid.

Examples of the aqueous binder include water-soluble binders such as polyvinyl alcohol, silanol-modified polyvinyl alcohol, starch, cationized starch, casein, gelatin, carboxymethylcellulose, hydroxyethylcellulose, polyvinylpyrrolidone, polyalkylene oxide, and polyalkylene oxide derivatives. Polymers, water-dispersible polymers such as styrene-butadiene latex, acrylic emulsions, and the like are included. These aqueous binders may be used alone or in combination of two or more. Among these, polyvinyl alcohol and silanol-modified polyvinyl alcohol are preferable in terms of adhesion to the pigment and peel resistance of the image receiving layer.

The image receiving layer may contain, in addition to the pigment and the aqueous binder, a mordant, a waterproofing agent, a lightfastness improving agent, a surfactant, and other additives.

The mordant is preferably immobilized. For this purpose, a polymer mordant is preferably used. The polymer mordant is described in
No. 28325, No. 54-74430, No. 54-124
No. 726, No. 55-22766, No. 55-14233
No. 9, No. 60-23850, No. 60-23851,
No. 60-23852, No. 60-23853, No. 60
No.-57836, No. 60-60643, No. 60-11
No. 8834, No. 60-122940, No. 60-122
No. 941, No. 60-122942, No. 60-2351
No. 34, JP-A-1-161236, U.S. Pat. Nos. 2,484,430, 2,548,564 and 31,480.
No. 61, No. 3309690, No. 4115124, No. 4124386, No. 4193800, No. 42738
No. 53, No. 4,282,305, and No. 4,450,224. An image receiving material containing a polymer mordant described on pages 212 to 215 of JP-A-1-161236 is particularly preferred. By using the polymer mordant described in the publication, an image with excellent image quality is obtained, and the light fastness of the image is improved.

The water-proofing agent is effective for making the image water-resistant, and cationic resins are particularly preferred. Examples of the cationic resin, for example, polyamide polyamine epichlorohydrin, polyethylene imine, polyamine sulfone, dimethyl diallyl ammonium chloride polymer,
Examples thereof include cationic polyacrylamide and colloidal silica, and among these, polyamide polyamine epichlorohydrin is particularly preferable. The content of these cationic resins is 1 to 15 with respect to the total solid content of the image receiving layer.
% By mass, and particularly preferably 3 to 10% by mass.

Examples of the light fastness improver include zinc sulfate, zinc oxide, hinderamine antioxidants, and benzotriazole ultraviolet absorbers such as benzophenone. Among these, zinc sulfate is particularly preferred.

The surfactant functions as a coating aid, a release improver, a slipperiness improver, or an antistatic agent. The surfactant is described in JP-A-62-1734.
Nos. 63 and 62-183457. An organic fluoro compound may be used instead of the surfactant. The organic fluoro compound is preferably hydrophobic. Examples of the organic fluoro compound include a fluorine-based surfactant, an oily fluorine-based compound (eg, fluorine oil), and a solid fluorine compound resin (eg, ethylene tetrafluoride resin). The above-mentioned organic fluoro compounds are described in JP-B-57-9053 (Nos. 8 to 17).
Column), JP-A-61-20994 and JP-A-62-13582.
No. 6 describes each.

Examples of the other additives include a pigment dispersant, a thickener, an antifoaming agent, a dye, a fluorescent brightener, a preservative, a pH adjuster, a matting agent, and a hardening agent. .
The image receiving layer may be a single layer or two or more layers.

The thickness of the image receiving layer is 10 to 50 μm.
m is preferable and 20 to 40 μm is more preferable.

The image receiving material may be provided with a back coat layer. Examples of components that can be added to the back coat layer include white pigments, aqueous binders, and other additives.

Examples of white pigments contained in the back coat layer include light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate,
Satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic amorphous silica, colloidal silica, colloidal alumina, pseudoboehmite,
White inorganic pigments such as aluminum hydroxide, alumina, lithopone, zeolite, hydrohaloysite, magnesium carbonate, magnesium hydroxide, etc., organic pigments such as styrene plastic pigment, acrylic plastic pigment, polyethylene, microcapsules, urea resin, melamine resin, etc. Is mentioned.

The aqueous binder contained in the back coat layer includes styrene / maleate copolymer, styrene / acrylate copolymer, polyvinyl alcohol, silanol-modified polyvinyl alcohol, starch,
Examples include water-soluble polymers such as cationized starch, casein, gelatin, carboxymethylcellulose, hydroxyethylcellulose, and polyvinylpyrrolidone, and water-dispersible polymers such as styrene-butadiene latex and acrylic emulsion.

Other components contained in the back coat layer include an antifoaming agent, an antifoaming agent, a dye, a fluorescent whitening agent, a preservative, and a waterproofing agent.

A polymer latex may be added to the constituent layers (including the back coat layer) in the image receiving material. The polymer latex is used for the purpose of improving film physical properties such as dimensional stability, curl prevention, adhesion prevention, and film crack prevention. The polymer latex is described in JP-A Nos. 62-245258 and 62-13166.
Nos. 48 and 62-11066. When a polymer latex having a low glass transition temperature (40 ° C. or less) is added to a layer containing a mordant, cracking and curling of the layer can be prevented. When a polymer latex having a high glass transition temperature is added to the back coat layer, the back coat layer can be prevented from curling.

The ink jet recording method is not particularly limited, and is a known method, for example, a charge control method for discharging ink using electrostatic attraction, a drop-on-demand method using a vibration pressure of a piezo element (pressure pulse). method),
Acoustic ink jet method that converts electric signals into acoustic beams, irradiates the ink, and uses the radiation pressure to eject the ink,
And a thermal ink jet method in which bubbles are formed by heating the ink and the generated pressure is used. The inkjet recording method includes a method of ejecting a large number of low-density inks called photo inks in a small volume, a method of improving image quality by using a plurality of inks having substantially the same hue and different densities, and a method of colorless and transparent. A method using ink.

[0215]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples. In the following, “parts” and “%” represent “parts by mass” and “% by mass” unless otherwise specified. (Example 1) <Production Example 1 (Preparation of colored fine particle dispersion (B-1))> 4 parts of isopropyl alcohol, tert-butanol
6 parts, oil-soluble polymer (PA-14 (acid content 2.07 m
mol / g)) and 1.2 parts of an oil-soluble dye (exemplified compound (21)) in a mixture of 0.8 parts of 2 mol / L sodium hydroxide, gradually reducing the amount of the acid of the oil-soluble polymer at which the acid is neutralized. Then, the mixture was heated to 80 ° C., and 30 parts of water was added with stirring. This solution was concentrated under reduced pressure at 40 ° C.
A 5% dispersion of colored fine particles was prepared. Hereinafter, this is abbreviated as colored fine particle dispersion (B-1) (Table 1).

<Production Example 2 (Colored fine particle dispersion (B-2))
Preparation> Ethyl acetate 3 parts, cyclohexanone 0.
5 parts of an oil-soluble polymer (PA-19 (acid content 0.69 m
mol / g)) and a mixture of 0.6 part of an oil-soluble dye (exemplary compound (1)) was prepared. On the other hand, a mixed solution of 2 mol / L sodium hydroxide in an amount capable of neutralizing the acid of the oil-soluble polymer, 15 parts of water, and 0.2 parts of sodium di (2-ethylhexyl) sulfosuccinate was prepared. The two mixed solutions were combined, mixed and emulsified with a homogenizer, and then concentrated under reduced pressure at 40 ° C. to obtain a solid content of 20%.
% Dispersion of colored fine particles was prepared. Hereinafter, this is abbreviated as colored fine particle dispersion (B-2) (Table 1).

<Production Examples 3 to 10> In a manner similar to that of Production Example 1, B-3 to B-8 were converted to B-8 by a similar method of Production Example 2.
-9 to B-10 were produced (Table 1).

<Production Example 11 (Colored fine particle dispersion (B-1)
Preparation of 1))> 4 parts of isopropyl alcohol, ter
6 parts of t-butanol, oil-soluble polymer (PA-19)
(Acid content 0.69 mmol / g)) 1.2 parts, an oil-soluble dye (exemplified compound (21)) 0.5 part and a high-boiling organic solvent (S-2) 0.3 part of a mixed solution of 2 mol / L sodium hydroxide was gradually added in an amount to neutralize the acid of the oil-soluble polymer, and then the temperature was raised to 80 ° C.
Parts were added. This liquid was concentrated at 40 ° C. under reduced pressure to prepare a colored fine particle dispersion having a solid content of 24%. Hereinafter, this is abbreviated as colored fine particle dispersion (B-12) (Table 1).

<Production Example 12 (Colored fine particle dispersion (B-1)
Preparation of 2))> 4 parts of isopropyl alcohol, ter
6 parts of t-butanol, oil-soluble polymer (PC-10)
(Acid content 0.08 mmol / g)) 1.2 parts, oil-soluble dye (Exemplified Compound (21)) 0.4 part and high boiling organic solvent (S-2) 0.2 part, (S-24) 0 To 2 parts of the mixture, 2 mol / L sodium hydroxide was gradually added in such an amount that the acid of the oil-soluble polymer was neutralized, then the temperature was raised to 80 ° C., and 30 parts of water was added with stirring. . This liquid was concentrated at 40 ° C. under reduced pressure to prepare a colored fine particle dispersion having a solid content of 30%. Hereinafter, this is referred to as a colored fine particle dispersion (B-12).
(Table 1).

[0220]

[Table 1]

The particle diameter in the table indicates the volume average diameter (Microtrac UPA150; measured by Nikkiso Co., Ltd.).

(Preparation of Sample 1) To 42 parts of the colored fine particle dispersion (B-1) prepared in Production Example 1, 8 parts of diethylene glycol, 8 parts of glycerin, 5 parts of triethylene glycol monobutyl ether, and 5 parts of hexaethylene glycol monosulfate 0.5 parts of sodium dodecyl ether,
Sodium di (2-ethylhexyl) sulfosuccinate
0.5 part and 36 parts of ion-exchanged water were mixed, and 0.45
The solution was filtered through a μm filter to prepare an aqueous inkjet ink (Table 2).

(Preparation of Samples 2 to 12) The procedure of Preparation of Sample 1 was repeated except that the dispersion of colored fine particles (B-1) was replaced with the dispersion of colored fine particles prepared in Production Examples 2 to 12. An inkjet ink was prepared in the same manner as in Sample 1 (Table 2).

(Preparation of Sample 13) 7.02 g of an oil-soluble dye (Exemplified Compound (21)) and 8.78 g of sodium dioctylsulfosuccinate were added to a high boiling organic solvent (S-4).
43 g of an oil-soluble polymer (PA-19 (acid content 0.69)
mmol / g)) 21.1 g and ethyl acetate 50 m
at 70 ° C. During the dissolution, 2 mol / l sodium hydroxide was gradually added in an amount such that the acid of the oil-soluble polymer was neutralized. 500 ml of deionized water was added to this solution while stirring with a magnetic stirrer to prepare an oil-in-water type coarse particle dispersion. Next, this coarse particle dispersion is used as a microfluidizer (MICROFLUI).
(DEX INC) at a pressure of 600 bar for 5 passes to obtain fine particles. Further, the obtained emulsion was desolvated by a rotary evaporator until the odor of ethyl acetate disappeared. The fine emulsion of the oil-soluble dye thus obtained was added with diethylene glycol 140.
g, glycerin 50 g, SURFYNOL465 (Ai
An ink was prepared by adding 7 g of rProducts & Chemicals) and 900 ml of deionized water.

<Preparation of Comparative Sample 1> The following comparative dye (H-
1) 10 parts of diethylene glycol, 8 parts of glycerin, and 6 parts of tetraethylene glycol monobutyl ether
0 parts, 1 part of diethanolamine, and ion-exchanged water 6
Five parts were mixed and filtered through a 0.2 μm filter to prepare an inkjet ink.

[0226]

Embedded image

<Preparation of Comparative Sample 2> The following oil-soluble dye (H
A colored fine particle dispersion (B-13) was produced in the same manner as in Production Example 2 using -2) (Table 1). Next, in the preparation of Sample 1, the colored fine particle dispersion (B-1) was
An ink-jet ink was prepared in the same manner as in the preparation of Sample 1 except that -13) was used (Table 2).

[0228]

Embedded image

(Image Recording and Evaluation) The following evaluations were performed on the ink jet inks of the above Examples and Comparative Examples. The results are shown in Table 2. In Table 2,
"Color tone", "Paper dependence", "Waterfastness" and "Lightfastness"
Was evaluated after each ink-jet ink was recorded on a photo glossy paper (manufactured by Fuji Photo Film Co., Ltd .; ink-jet paper, photo grade) with an ink-jet printer (manufactured by EPSON Corporation; PM-700C). Things.

<Color Tone> The recorded images were observed and evaluated as A (good) and B (bad) in two steps.

<Paper Dependency> The color tone of the image formed on the photo glossy paper and the image separately formed on the plain paper for PPC are compared. The case where the difference between the images was large was evaluated as B (poor) and evaluated in two steps.

<Water Resistance> The photo glossy paper on which the image was formed was dried for 1 hour at room temperature, immersed in water for 30 seconds, allowed to dry naturally at room temperature, and observed for bleeding. A sample without bleeding was evaluated as A, a sample with slight bleeding as B, and a sample with much bleeding as C.

<Light fastness> Xenon light (85000 lx) was irradiated on the photo glossy paper on which the image was formed using a weather meter (Atlas CI65) for 3 days, and the image density before and after the xenon irradiation was measured using a reflection densitometer. (X-Rite31
0TR) and evaluated as the residual dye ratio.
The reflection density was measured at three points of 1, 1.5 and 2.0. In any of the concentrations, the case where the residual ratio of the dye was 70% or more was A, and 1 or 2 points were less than 70% as B, and the case where all the concentrations were less than 70% was C.

[0234]

[Table 2]

As is evident from the results shown in Table 2, the ink-jet ink of the present invention has a small particle size, is excellent in printing suitability, is excellent in coloring property and color tone, has no dependence on paper, and has water resistance and light resistance. Was excellent.

Example 2 An oil-soluble dye (exemplary compound 2), (exemplary compound 22), (exemplary compound 22), (exemplary compound 23), and (exemplary compound) were prepared in the same manner as in Sample 2 of Example 1. 24), (exemplary compound 26), (exemplary compound 3)
As a result of evaluating (6), the same result as that of Example 1 was obtained.

Example 3 (Preparation of Sample 101) Oil-soluble dye (Exemplified Compound (2
1)) 7.02 g and 8.78 g of sodium dioctyl sulfosuccinate were added to 5.27 of a high boiling organic solvent (S-2).
g, 8.78 g of a high boiling point organic solvent (S-11) and 50 ml of ethyl acetate at 70 ° C. 500 ml of deionized water was added to this solution while stirring with a magnetic stirrer to prepare an oil-in-water type coarse particle dispersion. Next, this coarse-grained dispersion was treated with a microfluidizer (MICROFLUIDEX INC) at 600 ba.
The particles were made to pass through five times at a pressure of r to form fine particles. Further, the obtained emulsion was desolvated by a rotary evaporator until the odor of ethyl acetate disappeared. 140 g of diethylene glycol, 50 g of glycerin, and SURFYNOL were added to the fine emulsion of the hydrophobic dye thus obtained.
465 (Air Products & Chemicals)
Co., Ltd.) and 900 ml of deionized water were added to prepare an ink.

(Preparation of Samples 102 to 109) Sample 101
Was prepared in the same manner as in Sample 101 except that the oil-soluble dye (Exemplary Compound (21)) was changed to the oil-soluble dye shown in Table 3.

<Preparation of Comparative Sample 110> A sample was prepared in the same manner as in Sample 101 except that the oil-soluble dye (Exemplary Compound (21)) of Sample 101 was changed to the following compound H-2.

[0240]

Embedded image

Samples 101 to 110 thus obtained
Was measured using Microtrac UPA (Nikkiso Co., Ltd.). The results are shown in Table 3.

Next, the ink samples 101 to 109, and the sample 110 as a comparative sample, EPSON Cyan PM-7
For 00C and EPSON Light Cyan PM-70
The evaluation for 0C (manufactured by EPSON) was performed in the same manner as in Example 1. Table 3 shows the results.

[0243]

[Table 3]

As is evident from the results shown in Table 3, the ink-jet ink of the present invention was excellent in color developability and color tone, small in dependence on paper, and excellent in water fastness and light fastness.

(Example 4) The same ink produced in Example 3 was used in an ink jet printer BJ-F850 (CA
Example 3) An image was printed on the photo glossy paper GP-301 of the company using the same machine.
The same evaluation as in Example 3 was performed, and the same result as in Example 3 was obtained.

[0246]

According to the present invention, the above-mentioned conventional problems can be solved, there is no paper dependence, excellent color development and color tone when printed on arbitrarily selected paper, handleability and odor. Excellent recording properties, safety, water resistance, light resistance, etc.
Water-based ink for writing, water-based printing ink, coloring composition suitable for ink for information recording, etc., which enables high image quality, including the coloring composition, suitable for thermal, piezoelectric, electric field or acoustic ink jet system, nozzle, etc. When performing printing or the like, without clogging at the nozzle tip,
There is no dependence on paper, and it is excellent in color developability and color tone when printed on arbitrarily selected paper, and it is excellent in water resistance and light resistance, and high quality recording is possible using this ink for ink. It is possible to provide a simple inkjet recording method.

Continued on the front page F-term (reference) 2C056 EA09 EA11 EA13 EE08 FC02 2H086 BA53 BA56 BA59 4H056 CA01 CC02 CC08 CE03 DD03 DD06 4J039 AD01 AD03 AD04 AD05 AD06 AD08 AD09 AD10 AD12 AD13 AD14 AD15 AD20 AD22 AD23 AE04 BC20 BC12 BC05 BC31 BC33 BC36 BC44 BC50 BC51 BC54 BC56 BC65 BE07 CA06 DA02 EA35 EA38 EA41 EA42 EA45 EA47 GA24

Claims (9)

[Claims] 1. An oil-soluble dye represented by the following general formula (1):
A coloring composition comprising: Embedded image(In the general formula (1), R¹, R^Two, R^ThreeAnd R^FourAre independent
Represents a hydrogen atom or a substituent;^FiveAnd R⁶Are each
Independently, hydrogen atom, alkyl group, aryl group, heterocycle
Group, acyl group, alkanesulfonyl group or arene
Represents a rufonyl group. R¹And R^Two, R^TwoAnd R^Five, R^FiveAnd R⁶, R
^FourAnd R⁶And / or R^ThreeAnd R^FourCombine with each other to form a ring
May be formed. p represents an integer of 0 to 3
You. A is represented by any of the following general formulas (2) to (4)
Represents a group. )(In the general formula (2), R⁷Represents an aryl group or a heterocyclic group
Represents, R⁸Is an aryl group, a heterocyclic group or -NR⁹R^TenTo
Represents, R⁹And R^TenAre each independently a hydrogen atom, an alkyl
Group, alkenyl group, aryl group, heterocyclic group, acyl
Group, alkane sulfonyl group, arene sulfonyl group,
Rubamoyl group, sulfamoyl group, alkoxy carbonyl
Group, aryloxycarbonyl group, alkoxysulfo
Group, an aryloxysulfonyl group or an amino group
Represents, R⁹And R^TenAnd 5 to 7 membered nitrogen containing
A ring may be formed. Where R⁹And R^TenAnd hydrogen simultaneously
It does not represent an atom. * Represents a bonding position. )(EWG in the general formula (3)¹Is the Hammett's substituent constant σ_p
Represents an electron-withdrawing group having a value of 0.30 or more;¹¹Is a substituent
And m represents an integer of 0 to 2. R ¹¹And E
WG¹May combine with each other to form a ring, and m = 2
Then two R¹¹Are the same but different
You may. * Represents a bonding position. )(EWG in the general formula (4)^TwoIs the Hammett's substituent constant σ_p
Represents an electron-withdrawing group having a value of 0.30 or more;¹²And R
¹³Each independently represents a substituent, n represents 0 or 1,
X is O or N-SO_Two-R¹⁴And R¹⁴Is alkyl
Represents a group or an aryl group. * Represents a bonding position. ) 2. The coloring composition according to claim 1, wherein the oil-soluble dye is dispersed in an aqueous medium. 3. A boiling point of 150 ° C. or higher and 25 ° C.
The colored composition according to claim 2, comprising a dye dispersion obtained by dispersing an oil-soluble dye dissolved in a high boiling point organic solvent having a relative dielectric constant of 3 to 12 in an aqueous medium. 4. The colored composition according to claim 2, comprising a colored fine particle dispersion in which colored fine particles containing an oil-soluble dye and an oil-soluble polymer are dispersed in an aqueous medium. 5. The colored composition according to claim 4, wherein the colored fine particle dispersion contains a high-boiling organic solvent. 6. The colored composition according to claim 4, wherein the colored fine particles comprise an oil-soluble dye dispersed in an oil-soluble polymer. 7. The coloring composition according to claim 1, which is used for an ink composition. 8. An ink-jet ink comprising the coloring composition according to claim 1. Description: 9. An ink jet recording method, wherein recording is performed using the ink for ink jet according to claim 8.