JPH10204349A - Magenta ink composition showing reduced bleeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink composition that causes no color mixing bleeding by its contact with other ink compositions, by making the ink composition contain a polyallylamine, a magenta dye, which produces no deposits when it is in contact with a polyallylamine, an water-soluble organic solvent and water. SOLUTION: A magenta dye, which is not coagulated by a polyallylamine is represented by the formula, wherein A is phenyl group or a naphthyl group at least, one hydrogen of which may be replaced by a sulfone group optionally by another substituent, R is hydrogen, a lower alkyl carbonyl or an acyl group and M is an alkali metal, an organic amine and the like. It is preferred that the dye of the formula is added in an amount of about 0.1 to 20wt.%. A polyallylamine and a derivative thereof are a cationic polymer and are contained preferably in an amount of 0.05 to 20wt.%. This magenda ink and another ink containing another colorant in which a suspension is likely to be destroyed by contact with a polyamine are used in combination to thereby provide an ink set, which achieves an image with no bleeding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magenta ink composition capable of realizing an image with less bleeding, an ink composition capable of realizing an image with less bleeding in combination with the magenta ink composition, and this magenta ink. And an ink set comprising the composition.

[0002] In the recording method using the background art ink composition, a solvent component dissolving or dispersing the colorant is essential. When the ink is applied onto the recording medium, the solvent component permeates or evaporates on the recording medium, thereby fixing the coloring component on the recording medium and recording characters or images.

In the recording with the ink composition due to the presence of the solvent component, the ink may flow from a predetermined place or may flow into a place to be recorded with another ink composition in some cases. Such a flow of ink causes bleeding or bleeding of mixed colors, and thus is preferably prevented.

[0004] The ink jet recording method is a printing method in which droplets of an ink composition are made to fly and adhere to a recording medium such as paper to perform printing. This method has a feature that high-resolution and high-quality images can be printed at a high speed with a relatively inexpensive device. In general, an ink composition used for ink jet recording contains water as a main component, and further contains a coloring component and a wetting agent such as glycerin for the purpose of preventing clogging. Even in the ink composition used in the ink jet recording method may be seen the phenomenon of bleeding or mixed color bleeding of the ink as described above,
Preferably, it is prevented.

Since cationic substances such as polyallylamine have the property of aggregating many colorant components or other components contained in the ink composition,
It has been proposed that a solution containing polyallylamine is prepared separately from the ink composition, and that the solution and the ink composition are brought into contact on a recording medium to perform printing without bleeding. No. 188174, 8-113
743).

[0006]

SUMMARY OF THE INVENTION The present inventors have now found a magenta dye which does not aggregate with polyallylamine. As a result, it has been found that a high-quality image which does not cause bleeding between the magenta ink composition and other ink compositions can be realized without preparing a solution containing polyallylamine. The present invention is based on this finding.

Accordingly, an object of the present invention is to provide a magenta ink composition capable of realizing a high-quality image without bleeding in combination with another ink composition.

Another object of the present invention is to provide an ink set capable of realizing a high quality image without bleeding.

A magenta ink composition according to the present invention comprises at least a dye represented by the following formula (I), polyallylamine or a derivative thereof, a water-soluble organic solvent, and water. Stuff.

[0010]

Embedded image (In the formula, A represents a phenyl group or Naruchiru group, at least one of the hydrogen atoms on these groups will be replaced with a sulfonic group, further optionally, -SO 3 _M, lower alkyl, -NHCO- lower alkyl , Lower alkoxy, or -NO ₃ , R represents a hydrogen atom, a lower alkylcarbonyl, or an acyl group, and M represents an alkali metal, ammonium, an organic amine, or a lower alkyl group The ink set according to the present invention is an ink set further comprising a yellow ink composition, a magenta ink composition, a cyan ink composition, and optionally a black ink composition, wherein the magenta ink composition comprises A magenta ink composition according to the invention, wherein any other or two or more ink compositions comprise Colorants that dissolve or disperse state is destroyed by Riruamin, an ink composition comprising a resin emulsion or an inorganic oxide colloid, an ink set.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Magenta ink composition The ink composition according to the present invention is used in a recording system using the ink composition. Examples of the recording method using the ink composition include an ink jet recording method, a recording method using a writing instrument such as a pen, and various other printing methods. In particular, the ink composition according to the present invention is preferably used for an ink jet recording method.

The magenta ink composition according to the present invention basically comprises at least the dye represented by the formula (I), polyallylamine or a derivative thereof, a water-soluble organic solvent, and water.

The magenta ink composition according to the present invention can be used together with an ink composition containing a colorant described below and a resin emulsion and / or an inorganic oxide colloid to form a magenta image area and another color. It is possible to realize a high-quality image free from color mixture blur with the image area. Although the mechanism for preventing the color mixture bleeding is not clear, the mechanism is as follows, provided that the present invention is not interpreted in a limited manner by the following theory. The polyallylamine in the magenta ink composition according to the present invention reacts with one or more of a pigment, a resin emulsion, and an inorganic oxide colloid in the ink composition used at the same time to form a precipitate. More specifically, upon contact of the magenta ink composition with another ink composition, the polyallylamine destroys the dispersed and / or dissolved state of the pigment, resin emulsion, inorganic oxide colloid in the other ink composition, It is thought that these components are precipitated. It is considered that the formation of the precipitate suppresses the color mixture due to the flowing of the ink composition thereafter.

As described above, a cationic substance such as polyallylamine destroys a dispersed or dissolved state of many colorant components, as described above. The presence of a specific magenta dye that does not produce precipitates, and the presence of a magenta dye that provides good color reproducibility even when used as an ink composition with polyallylamine,
It is not obvious to those skilled in the art.

In the above formula (I), A represents a phenyl group or a natyl group, and at least one hydrogen atom on these groups is replaced by a sulfone group. Further, the hydrogen atom on the phenyl or naphthyl group, optionally further _-SO 3 M, lower alkyl, -NHCO- lower alkyl, optionally substituted lower alkoxy, or -NO _3,. The "lower alkyl group" as a group or part of a group herein, preferably C _1-6 alkyl, more preferably a C _{1 -4} alkyl. Therefore, examples of the substituent of the phenyl group or the nartyl group represented by A include methyl, -NHCO-methyl, methoxy and the like.

In the formula (I), R represents a hydrogen atom, a lower alkylcarbonyl (for example, methylcarbonyl), or an acyl group. Here, the acyl group represents, for example, an aroyl group, more specifically, benzoyl, toluoyl, naphthoyl and the like.

In the formula (I), M is an alkali metal,
Represents ammonium, organic amines, or lower alkyl groups.

Specific examples of the dye represented by the formula (I) preferably used in the present invention include the following M-1
To M-9.

[0019]

Embedded image

[0020]

Embedded image In the present invention, the amount of the dye represented by the formula (I) is preferably about 0.1 to 20% by weight, more preferably about 0.5 to 10% by weight.

The ink composition according to the present invention comprises polyallylamine or a derivative thereof.

The polyallylamine and its derivatives usable in the present invention are cationic polymers which are soluble in water and positively charged in water. For example, the following formula (I
Compounds represented by I), Formula (III), and Formula (IV) are included.

[0023]

Embedded image (Wherein, X ⁻ represents a chloride ion, a bromide ion, an iodide ion, a nitrate ion, a phosphate ion, a sulfate ion, an acetate ion, etc.) In addition, a polymer obtained by copolymerizing allylamine and diallylamine or diallylmethylammonium chloride A copolymer of and sulfur dioxide can also be used.

The content of the polyallylamine or a derivative thereof is preferably 0.05 to 20% by weight, more preferably about 0.5 to 10% by weight.

The magenta ink composition according to the present invention comprises water and a water-soluble organic solvent in addition to the dye of the formula (I) and polyallylamine.

Specific examples of the water-soluble organic solvent include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, propylene glycol, butylene glycol, 1,2,6-hexanetriol, thioglycol, hexylene glycol, Polyhydric alcohols such as glycerin, trimethylolethane, trimethylolpropane, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol Monoethyl ether, triethylene glycol monobutyl Alkyl ethers of polyhydric alcohols, such as ether, urea, 2-pyrrolidone, N- methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, triethanolamine and the like.

According to a preferred embodiment of the present invention, the water-soluble organic solvent preferably contains glycerin.
The amount of glycerin added is preferably about 3 to 30% by weight, more preferably about 8 to 25% by weight.

According to another preferred embodiment of the present invention,
One or more selected from imidazole, 2-hydroxypyridine and thiodiglycol are added as the water-soluble organic solvent. By this addition, the compatibility between the polyallylamine and the dye can be improved, and as a result, the advantage that the clogging of the recording head can be effectively prevented and the recoverability of the clogging can be improved can be obtained. The addition amount of these water-soluble organic solvents is preferably about 0.1 to 30% by weight, more preferably about 1 to 20% by weight.

Ink Set The ink composition used in the present invention together with the above-described magenta ink composition to realize a high-quality image without bleeding is a colorant or a resin emulsion whose dissolved or dispersed state is destroyed by polyallylamine. Or an ink composition comprising an inorganic oxide colloid. That is, the first is an ink composition in which the colorant is dissolved or dispersed by polyallylamine, the second is an ink composition containing a resin emulsion, and the third is an inorganic oxide colloid. Is an ink composition comprising: Further, according to a preferred embodiment of the present invention, the ink composition may include at least two or even three components of the above colorant, resin emulsion, and inorganic oxide colloid.

The colorant contained in the ink composition used in the ink set according to the present invention may be either a dye or a pigment, but is preferably a pigment.

As the dyes, direct dyes, acid dyes, food dyes, basic dyes, reactive dyes, disperse dyes, vat dyes,
Various dyes such as a soluble vat dye and a reactive disperse dye can be used.

As the pigment, an inorganic pigment or an organic pigment can be used. As inorganic pigments, in addition to titanium oxide and iron oxide, contact method, furnace method,
Carbon black produced by a known method such as a thermal method can be used. Examples of the organic pigment include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, chelated azo pigments, etc.), and polycyclic pigments (for example, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazines) Pigments, thioindigo pigments, isoindolinone pigments, quinofuralone pigments, etc.), dye chelates (for example,
Basic dye type chelates, acid dye type chelates, etc.), nitro pigments, nitroso pigments, aniline black and the like can be used.

According to a preferred embodiment of the present invention, these pigments are preferably added to the ink as a pigment dispersion obtained by dispersing in an aqueous medium with a dispersant or a surfactant. As a preferred dispersant, a dispersant commonly used for preparing a pigment dispersion, for example, a polymer dispersant can be used. It will be apparent to those skilled in the art that the dispersant and surfactant contained in this pigment dispersion will also function as the dispersant and surfactant of the ink composition.

The amount of the pigment added to the ink is 0.5 to 25.
% By weight, more preferably 2 to 15% by weight.
It is about.

The resin emulsion contained in the ink composition means an emulsion in which the continuous phase is water and the dispersed phase is the following resin component. Acrylic resin, vinyl acetate resin, styrene-
Butadiene resin, vinyl chloride resin, acrylic-styrene resin, butadiene resin, styrene resin, crosslinked acrylic resin, crosslinked styrene resin, benzoguanamine resin, phenol resin, silicone resin, epoxy resin,
And so on.

According to a preferred embodiment of the present invention, the resin is preferably a polymer having both a hydrophilic part and a hydrophobic part. Further, the particle size of these resin components is not particularly limited as long as an emulsion is formed.
Or less, more preferably about 5 to 100 nm.

These resin emulsions can be obtained by dispersion polymerization of a resin monomer in water together with a surfactant, if necessary. For example, an emulsion of an acrylic resin or a styrene-acrylic resin can be obtained by dispersing and polymerizing a (meth) acrylate or a (meth) acrylate and styrene together with a surfactant in water.
The mixing ratio of the resin component and the surfactant is usually 10: 1.
It is preferable to set it to about 5: 1. When the amount of the surfactant used is in the above range, better water resistance and permeability of the ink can be obtained. Although the surfactant is not particularly limited, preferred examples thereof include anionic surfactants (for example, sodium dodecylbenzenesulfonate, sodium laurate, ammonium salts of polyoxyethylene alkyl ether sulfate, and the like), nonionic surfactants ( For example, polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl amine, polyoxyethylene alkyl amide, etc.) can be used alone or in combination. A mixture of more than one species can be used. Also, acetylene glycol (Olefin Y and Surfynol 82, 104, 440, 465, and 485 (all of which are Air Products and Chemicals In
c.)) can also be used.

The ratio of the resin as the disperse phase component to water is preferably from 60 to 400 parts by weight, more preferably from 100 to 200 parts by weight, based on 100 parts by weight of the resin.

As such a resin emulsion, known resin emulsions can also be used. For example, JP-B-62-1426, JP-A-3-56573, JP-A-3-79678, and JP-A-3-160068. The resin emulsion described in JP-A-4-18462 can be used as it is.

It is also possible to use a commercially available resin emulsion, for example, Microgel E-100.
2, E-5002 (styrene-acrylic resin emulsion, manufactured by Nippon Paint Co., Ltd.), Boncoat 4001
(Acrylic resin emulsion, manufactured by Dainippon Ink and Chemicals, Inc.) Boncoat 5454 (styrene-acrylic resin emulsion, manufactured by Dainippon Ink and Chemicals, Inc.), SAE-1014 (styrene-acrylic resin emulsion, Zeon Corporation) Made), Cybinol S
K-200 (acrylic resin emulsion, manufactured by Seiden Chemical Co., Ltd.).

The ink used in the present invention preferably contains a resin emulsion such that the resin component is 0.1 to 40% by weight of the ink, more preferably 1 to 2% by weight.
It is in the range of 5% by weight.

The resin emulsion has an effect of suppressing penetration of a coloring component and further promoting fixation to a recording medium by interaction with polyallylamine or a derivative thereof. Further, depending on the type of the resin emulsion, a film is formed on the recording medium, which has the effect of improving the abrasion resistance of the printed matter.

Preferred examples of the inorganic oxide colloid contained in the ink composition include colloidal silica and alumina colloid. These are generally SiO 2
_2, ultra fine particles such as Al ₂ 0 ₃ is a colloidal solution dispersed in water or an organic solvent. As a commercially available inorganic oxide colloid, the dispersion medium is water, methanol, 2-propanol, n-propanol, xylene and the like.
those particle size of iO _{2, Al 2 0 3} or the like of the particles are 5~100nm is common. In addition, the pH of the inorganic oxide colloid solution is often adjusted not to a neutral region but to acidic or alkaline. This is because the stable dispersion region of the inorganic oxide colloid exists on the acidic side or the alkaline side, and when added to the ink composition, the pH of the stable dispersion region of the inorganic oxide colloid and the pH of the ink are adjusted. It is necessary to add in consideration.

It is preferable to add the inorganic oxide colloid in the ink composition in an amount of 0.1 to 15% by weight. Two or more inorganic oxide colloids may be added.

According to a preferred embodiment of the present invention, when these colorants are pigments, the pigments are added to the ink as a pigment dispersion obtained by dispersing in an aqueous medium with a dispersant or a surfactant. Preferably. As a preferred dispersant, a dispersant commonly used for preparing a pigment dispersion, for example, a polymer dispersant can be used.

Preferred examples of the dispersant or surfactant include polyacrylic acid, polymethacrylic acid, acrylic acid-acrylonitrile copolymer, vinyl acetate-acrylate copolymer, and acrylic acid-alkyl acrylate copolymer. Styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, styrene-acrylic acid-
Acrylic acid alkyl ester copolymer, styrene-methacrylic acid-acrylic acid alkyl ester copolymer, styrene-α-methylstyrene-acrylic acid copolymer, styrene-α-methylstyrene-acrylic acid-acrylic acid alkyl ester copolymer Copolymer, styrene-maleic acid copolymer, vinylnaphthalene-maleic acid copolymer, vinyl acetate-ethylene copolymer, vinyl acetate-fatty acid vinyl ethylene copolymer, vinyl acetate-maleic acid ester copolymer, vinyl acetate- Crotonic acid copolymer and vinyl acetate-acrylic acid copolymer.

According to a preferred embodiment of the present invention, these copolymers have a weight average molecular weight of from 3,000 to 50,000.
Degree is preferable, and more preferably 5,000 to
About 30.000, most preferably 7.000 to 15.
It is about 000.

The amount of the dispersing agent added may be appropriately selected so that the pigment is stably dispersed and other effects of the present invention are not lost. According to a preferred embodiment of the present invention, the amount of the pigment: dispersant is preferably in the range of about 1: 0.06 to 1: 3, more preferably in the range of about 1: 0.125 to 1: 3. .

According to a preferred embodiment of the present invention, the ink composition preferably contains an organic solvent. This organic solvent is preferably a low-boiling organic solvent, and preferred examples thereof include methanol, ethanol, n-propyl alcohol, iso-propyl alcohol, n-butanol, sec-butanol, tert-butanol, is
o-butanol, n-pentanol and the like.
Particularly, a monohydric alcohol is preferable. Low-boiling organic solvents have the effect of shortening the drying time of the ink.

According to a preferred embodiment of the present invention, the ink composition used in the present invention preferably further comprises a wetting agent comprising a high-boiling organic solvent. Preferred examples of the high-boiling organic solvent include ethylene glycol,
Diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, propylene glycol, butylene glycol, 1,2,6-
Polyhydric alcohols such as hexanetriol, thioglycol, hexylene glycol, glycerin, trimethylolethane, trimethylolpropane, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, Alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, urea, 2-pyrrolidone, N-methyl-2-pyrrolidone, 1,3-dimethyl-2 -Imidazolidinone, triethanolamine and the like.

The amount of the wetting agent added is 0.5% of the ink.
Preferably, it is in the range of 2 to 20% by weight. Further, the amount of the low-boiling organic solvent to be added is preferably 0.5 to 10% by weight of the ink, more preferably 1.5 to 6% by weight.

According to a preferred embodiment of the present invention, the ink composition preferably contains a sugar. Examples of saccharides include monosaccharides, disaccharides, oligosaccharides (including trisaccharides and tetrasaccharides) and polysaccharides, preferably glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucosyl Sorbitol, maltose, cellobiose, lactose, sucrose, trehalose, maltotriose, and the like. Here, the polysaccharide means a sugar in a broad sense, and is used to include a substance widely existing in nature such as alginic acid, α-cyclodextrin, and cellulose.

The derivatives of these saccharides include reducing sugars of the aforementioned saccharides (for example, sugar alcohols (formula H
OCH ₂ (CHOH) n CH ₂ OH (where n = 2
Represented by an integer of 5), oxidized sugars (eg, aldonic acid, uronic acid, etc.), amino acids, thiosugars and the like. In particular, sugar alcohols are preferred, and specific examples include maltitol and sorbitol.

The content of these saccharides is 0.1 to 0.1% of the ink.
A suitable range is 40% by weight, preferably 0.5 to 30% by weight.

In addition, a pH adjuster, a preservative, a fungicide and the like may be added as necessary.

[0056]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

The ink sets of Examples 1 to 4 comprising the ink compositions of the following compositions were prepared.

In the following description, the following abbreviations are used.

M-1 to M-9: means the numbers of the above-mentioned dyes.

PAA (solid content): polyallylamine: Danfix 723 (manufactured by Nitto Boseki Co., Ltd.) DEGmBE: diethylene glycol monobutyl ether TEGmBE: triethylene glycol monobutyl ether DPGmME: dipropylene glycol monomethyl ether Pigment 1: carbon black CW2 (Orient Chemical Pigment 2: Carbon black MA7 (Mitsubishi Chemical Corporation) St-Ac: Styrene acrylic acid copolymer (dispersant) KOH: Potassium hydroxide TEA: Triethanolamine Bon coat 4001: Acrylic resin emulsion: Resin Ingredient 50%, MFT = 5 ° C; (Dai Nippon Ink Co., Ltd.)

Example 1 Magenta Ink Black Ink Colorant M-5; 2.8% Pigment 1: 4.5% Glycerin 10 14 Diethylene glycol 73 DEGmBE 75 PAA2-TEA 0.3 0.7 Imidazole 12-

Example 2 Magenta Ink Black Ink Colorant M-3; 3.5% Pigment 1: 5.5% Glycerin 14 11 Diethylene glycol 33 DEGmBE 45 55 Surfynol TG 0.9 1.2 PAA 3-KOH 1. 5 0.7 Thiodiglycol 8-

Example 3 Magenta Ink Black Ink Colorant M-9; 2.5% Pigment 2: 5.1% Glycerin 10 10 Diethylene glycol 73 DEGmBE 75 Surfinol TG 0.8-PAA 2.3-TEA-0 0.7 KOH 1.3-2-hydroxypyridine 5-St-Ac-1 Boncoat 4001-48 Sucrose-1 maltitol-5.8 ethanol-5

Example 4 Magenta Ink Black Ink Colorant M-1; 3.5% Pigment 2: 4.5% Glycerin 12 10 Diethylene glycol-3 Surfynol TG 1.5-PAA3-TEA-0.7 KOH 1. 5-St-Ac-1 Boncoat 4001-50 Sucrose-0.7 Maltitol-6.3 Ethanol-4- imidazole 12-

Print Evaluation Test A print test using the above ink set was performed as follows using an ink jet printer MJ-810C (manufactured by Seiko Epson).

(1) A letter and a solid (100% duty) pattern were printed on water-resistant plain paper XEROX-P (Xerox Co., Ltd.). After leaving the printed matter at room temperature for 24 hours, 0.5 m
l of water was added dropwise and allowed to dry naturally at room temperature. Thereafter, the state of printing bleeding was visually determined. The results were evaluated as follows. ：: Bleeding is not conspicuous. Δ: The character is slightly blurred, and the solid print is blurred beyond the boundary of the pattern. X: Characters could not be read, and solid color was missing.

(2) Color Bleed Solid printing of 100% duty magenta ink was performed on the following test paper, and black ink characters were simultaneously printed thereon.

1. Xerox P paper (manufactured by Xerox Co., Ltd.) 2. Riccopy 6200 paper (manufactured by Ricoh Co., Ltd.) 3. Xerox 4024 (manufactured by Xerox Co., Ltd.) 4. Neenah Bond paper (Kimberly Clark Co., Ltd.) 5. Xerox R paper (made by Xerox Corporation / recycled paper) 6. Yamayuri paper (made by Honshu Paper Co., Ltd./recycled paper) The presence or absence of uniform color mixture (bleed) was visually inspected. The results were evaluated as follows. ：: No color mixing in all test papers. Δ: There is a recording paper on which color mixture occurs on the beard. X: Color was mixed so that the outline of the character was not clear on all the test papers.

(3) Clogging Property The ink cartridge of the printer was filled with magenta ink, and alphanumeric characters were printed continuously for 10 minutes. After that, stop the printer and leave the cap at 40 ° C, 25% RH.
For 2 weeks. After the standing, alphanumeric characters were printed again, and the number of cleanings required until the same printing as before the standing was obtained was examined. The results were evaluated as follows.

A: Printing equivalent to the initial state is possible with two or more cleaning operations. Δ: Printing equivalent to the initial state is possible with three to five cleaning operations. X: Same as the initial state even after six or more cleaning operations. Printing is possible

The above results are as shown in the following table. (1) Water resistance (2) Bleed (3) Clogging Example 1 ○ ○ ○ Example 2 ○ ○ ○ Example 3 ○ ○ ○ Example 4 ○ ○ ○

Claims (10)

[Claims] 1. A magenta ink composition comprising at least a dye represented by the following formula (I), polyallylamine or a derivative thereof, a water-soluble organic solvent, and water. Embedded image (In the formula, A represents a phenyl group or Naruchiru group, at least one of the hydrogen atoms on these groups will be replaced with a sulfonic group, further optionally, -SO 3 _M, lower alkyl, -NHCO- lower alkyl , Lower alkoxy, or -NO ₃ , R represents a hydrogen atom, a lower alkylcarbonyl, or an acyl group, M represents an alkali metal, ammonium, an organic amine, or a lower alkyl group ) 2. The ink composition according to claim 1, wherein the polyallylamine or a derivative thereof is a polyallylamine represented by the following formula (II), (III), or (IV). Embedded image (Wherein, X ⁻ represents chloride ion, bromide ion, iodide ion, nitrate ion, phosphate ion, sulfate ion, acetate ion, etc.) 3. The ink composition according to claim 1, wherein the amount of the dye added is 0.1 to 20% by weight. 4. The ink composition according to claim 1, comprising glycerin. 5. An imidazole, 2-hydroxypyridine,
The ink composition according to any one of claims 1 to 4, comprising one or more selected from thiodiglycol and thiodiglycol. 6. An ink set further comprising a yellow ink composition, a magenta ink composition, and a cyan ink composition, and optionally a black ink composition, wherein the magenta ink composition comprises The ink composition according to any one of the above, wherein any one or more of the other ink compositions comprises a colorant, a resin emulsion, or an inorganic oxide colloid whose dissolution or dispersion is destroyed by polyallylamine. An ink set, which is an ink composition comprising the same. 7. The ink set according to claim 6, wherein the black ink composition comprises a pigment, a resin emulsion and / or an inorganic oxide colloid. 8. A recording method for printing on a recording medium by adhering an ink composition, wherein the ink composition is used as an ink composition.
Or a method using the ink composition of the ink set according to 7. 9. An ink jet recording method in which droplets of an ink composition are ejected and the droplets are attached to a recording medium to perform printing, wherein the ink composition according to claim 6 or 7 is used as an ink composition. An inkjet recording method using an ink composition. 10. A recorded matter recorded by the recording method according to claim 8 or 9.