WO2011027842A1 - インクセット、記録方法、記録物及び印刷物 - Google Patents
インクセット、記録方法、記録物及び印刷物 Download PDFInfo
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- WO2011027842A1 WO2011027842A1 PCT/JP2010/065074 JP2010065074W WO2011027842A1 WO 2011027842 A1 WO2011027842 A1 WO 2011027842A1 JP 2010065074 W JP2010065074 W JP 2010065074W WO 2011027842 A1 WO2011027842 A1 WO 2011027842A1
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- 0 CCCC(C(c(cn[n]1C)c1N=Nc(c(*)n1)c(N)[n]1ICCI(CC)[n](c(N)c1N=Nc([n](C)nc2)c2C(C(C)N)=O)nc1I)=O)=C Chemical compound CCCC(C(c(cn[n]1C)c1N=Nc(c(*)n1)c(N)[n]1ICCI(CC)[n](c(N)c1N=Nc([n](C)nc2)c2C(C(C)N)=O)nc1I)=O)=C 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/40—Ink-sets specially adapted for multi-colour inkjet printing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B33/02—Disazo dyes
- C09B33/12—Disazo dyes in which the coupling component is a heterocyclic compound
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0025—Crystal modifications; Special X-ray patterns
- C09B67/0028—Crystal modifications; Special X-ray patterns of azo compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
- C09B67/0041—Blends of pigments; Mixtured crystals; Solid solutions mixtures containing one azo dye
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/006—Preparation of organic pigments
- C09B67/0066—Aqueous dispersions of pigments containing only dispersing agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/324—Inkjet printing inks characterised by colouring agents containing carbon black
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Definitions
- the present invention relates to an aqueous pigment ink set, a recording method, a recorded matter, and a printed matter containing a novel yellow pigment.
- light resistance is one of the properties required for an image formed by an ink composition.
- a pigment is generally used as a colorant in the ink composition.
- satisfactory light resistance may not be imparted.
- pigments are inferior in coloring power as compared with dyes, and an image obtained by printing on a recording medium may lack vividness.
- This inkjet recording method is a printing method in which printing is performed by causing small droplets of an ink composition to fly and adhere to a recording medium such as paper. This method has a feature that a high-resolution and high-quality image can be printed at a high speed with a relatively inexpensive apparatus.
- the color ink jet recording apparatus has been used as a photographic output machine as a result of improved image quality, and has also been used as a digital printing machine, a plotter, a CAD output device, and the like.
- An image printed by an ink jet recording printer can be used in various forms.
- photographic prints and the like may be placed in a place exposed to direct sunlight such as a fluorescent lamp or outdoors for a long time as a display. Therefore, light fastness is a very important required performance for images obtained by the ink jet recording method.
- yellow pigment ink In the above-described pigment-based ink set excellent in a wide range of color reproducibility and light resistance, in particular, there is no yellow pigment ink that satisfies both a good hue and high light resistance, which satisfies the required performance at a high level, The development of yellow pigment ink has long been desired.
- a yellow ink composition containing a yellow pigment is used to reproduce the color of the yellow region.
- Specific examples of yellow pigments include C.I. I.
- Patent Documents 1 and 2 disclose that the yellow region color can be reproduced in a wide range by improving a plurality of yellow pigment compositions combined with the yellow pigment.
- a yellow ink composition containing two or more kinds of yellow pigments having good color reproducibility can obtain a wider range of color reproducibility than an ink containing one kind of pigment, but it reproduces dark color in the yellow region. Sex is not enough.
- the saturation of the secondary color tends to be low. I. Since Pigment Yellow 110 is tinged with red, green has a drawback that the color saturation becomes low when used in an ink set.
- C.I. I. Pigment Yellow 74 has a relatively good hue, but its light resistance is remarkably low, so when used in an ink set, the hue of yellow, red, green, and gray areas changes significantly, so that Quality degradation was a major issue.
- the method of using the second ink composition typified by dark yellow not only tends to increase the number of ink colors but also make the color production complicated and costly, but also the level of improvement is the required performance. It did not reach the level that can be fully satisfied.
- an azo pigment having a specific structure is a yellow ink composition, and at least one of a magenta ink composition and a cyan ink composition containing a specific colorant.
- the present inventors have found that the color reproducibility and the light resistance are compatible with the ink set to be included, and have completed the present invention.
- a yellow ink composition An ink set comprising at least one of a magenta ink composition and a cyan ink composition,
- the colorant of the yellow ink composition comprises an azo pigment represented by the following general formula (1), a tautomer thereof, a salt or a hydrate thereof,
- the magenta ink composition is a C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, C.I. I. Including at least one selected from Pigment Red 209, Cyan ink composition as a colorant C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. An ink set containing at least one selected from CI Pigment Blue 15: 6.
- Z represents a 5- to 8-membered nitrogen-containing heterocycle
- Y 1 , Y 2 , R 11 , and R 12 each independently represent a hydrogen atom or a substituent
- G 1 , G 2 Each independently represents a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group
- W 1 and W 2 each independently represent an alkoxy group, an amino group, an alkyl group or an aryl group.
- W 1 and W 2 in the general formula (1) are each independently an alkoxy group having 3 or less carbon atoms, an amino group, or an alkylamino group having 6 or less carbon atoms, [1] Alternatively, the ink set according to [2].
- [5] The ink set according to any one of [1] to [4], wherein Z in the general formula (1) is a 6-membered nitrogen-containing heterocycle.
- Z ′ represents a 6-membered nitrogen-containing heterocycle
- R 11 and R 12 each independently represent a hydrogen atom or a substituent
- W 1 ′ and W 2 ′ each independently represent a total number.
- the azo pigment represented by the formula (3) is an azo pigment having characteristic X-ray diffraction peaks at CuK ⁇ characteristic X-ray diffraction with Bragg angles (2 ⁇ ⁇ 0.2 °) of 7.2 ° and 25.9 °.
- the azo pigment represented by the formula (4) has characteristic X-rays with Bragg angles (2 ⁇ ⁇ 0.2 °) in CuK ⁇ characteristic X-ray diffraction of 7.6 °, 25.6 ° and 27.7 °.
- the addition amount of the colorant in the magenta ink composition is 3 to 6% by mass.
- the magenta ink composition contains ⁇ -type C.I. I. Pigment violet 19 and C.I. I.
- the colorant of the cyan ink composition is C.I. I.
- [20] [1] A recording method in which printing is performed by attaching the ink composition of the ink set according to any one of [19] to a recording medium. [21] [20] The recording method according to [20], wherein the recording method is an ink jet recording method in which a droplet of an ink composition is ejected and the droplet is attached to a recording medium for printing. [22] Recorded matter printed by the recording method according to [20] or [21].
- an ink set excellent in a wide range of color reproducibility, ozone gas fastness and light resistance is provided.
- an ink set having excellent color reproducibility and light fastness in a mixed color region such as a single yellow color and red and green colors is provided.
- the recorded image printed by the ink set of the present invention is also a mixed color part, especially yellow ink and cyan. It is possible to form a good recorded matter with improved hue, printing characteristics (colorability), and image fastness at a high level at the same time in the green and red portions where ink, yellow ink and magenta ink are printed.
- Specific compound examples synthesized according to Synthesis Example 1 Pig. 1 is a CuK ⁇ characteristic X-ray diffraction diagram of No. 1; Specific compound examples synthesized according to Synthesis Example 2 Pig.
- FIG. 18 is a CuK ⁇ characteristic X-ray diffraction diagram of 18;
- Specific compound examples synthesized according to Synthesis Example 3 Pig. 2 is a CuK ⁇ characteristic X-ray diffraction diagram of No. 2;
- Specific compound examples synthesized according to Synthesis Example 4 Pig. 3 is a CuK ⁇ characteristic X-ray diffraction diagram of No. 3;
- Specific compound examples synthesized according to Synthesis Example 5 Pig. 6 is a CuK ⁇ characteristic X-ray diffraction diagram of FIG. Specific compound examples synthesized according to Synthesis Example 6 Pig.
- FIG. 10 is a CuK ⁇ characteristic X-ray diffraction diagram of 10; Specific compound examples synthesized according to Synthesis Example 7 Pig.
- FIG. 12 is a CuK ⁇ characteristic X-ray diffraction diagram of 12; Specific compound examples synthesized according to Synthesis Example 8 Pig.
- FIG. 15 is a CuK ⁇ characteristic X-ray diffraction diagram of 15; Specific compound examples synthesized according to Synthesis Example 9 Pig.
- FIG. 16 is a CuK ⁇ characteristic X-ray diffraction diagram of 16; Specific compound examples synthesized according to Synthesis Example 10 Pig.
- FIG. 19 is a CuK ⁇ characteristic X-ray diffraction diagram of 19; Specific compound examples synthesized according to Synthesis Example 11 Pig.
- FIG. 21 is a CuK ⁇ characteristic X-ray diffraction diagram of No. 21.
- FIG. Specific compound examples synthesized according to Synthesis Example 12 Pig. 24 is a CuK ⁇ characteristic X-ray diffraction diagram of 24.
- FIG. 25 is a CuK ⁇ characteristic X-ray diffraction diagram of 25;
- FIG. 26 is a CuK ⁇ characteristic X-ray diffraction diagram of No. 26.
- FIG. 30 is a 30 CuK ⁇ characteristic X-ray diffraction diagram.
- FIG. 31 is a CuK ⁇ characteristic X-ray diffraction diagram of 31. Specific compound examples synthesized according to Synthesis Example 17 Pig.
- FIG. 32 is a CuK ⁇ characteristic X-ray diffraction diagram of 32. Specific compound examples synthesized according to Synthesis Example 18 Pig.
- FIG. 33 is a CuK ⁇ characteristic X-ray diffraction diagram of 33. Specific compound examples synthesized according to Synthesis Example 19 Pig.
- FIG. 34 is a CuK ⁇ characteristic X-ray diffraction diagram of 34.
- the ink set according to the present invention is used in a recording method using an ink composition.
- 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 other various printing methods.
- the ink set according to the present invention is preferably used in an ink jet recording method.
- An ink set according to the present invention comprises a yellow ink composition, An ink set comprising at least one of a magenta ink composition and a cyan ink composition,
- the colorant of the yellow ink composition contains an azo pigment represented by the following general formula (1), a tautomer thereof, a salt or a hydrate thereof,
- the magenta ink composition is a C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, C.I. I. Including at least one selected from Pigment Red 209, Cyan ink composition as a colorant C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. It contains at least one selected from Pigment Blue 15: 6.
- the ink set further contains a black ink composition, and the black ink composition contains carbon black as a colorant.
- An image excellent in color reproducibility can be realized by combining the ink compositions containing these pigments to form an image. Further, since the above pigment alone has high ozone gas fastness and light fastness, the obtained image is excellent in fastness.
- the yellow ink composition relating to the ink set of the present invention contains an azo pigment represented by the following general formula (1), a tautomer thereof, a salt or a hydrate thereof.
- Z represents a 5- to 8-membered nitrogen-containing heterocycle
- Y 1 , Y 2 , R 11 , and R 12 each independently represent a hydrogen atom or a substituent
- G 1 , G 2 Each independently represents a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group
- W 1 and W 2 each independently represent an alkoxy group, an amino group, an alkyl group or an aryl group.
- Z represents a 5- to 8-membered nitrogen-containing heterocycle, which may be further condensed.
- Z is preferably a 5- to 8-membered heterocyclic group, more preferably a 5- or 6-membered substituted or unsubstituted heterocyclic group, and particularly preferably a 6-membered nitrogen-containing heterocyclic ring having 3 to 10 carbon atoms. It is a group.
- heterocyclic group represented above examples include, but are not limited to, substitution positions.
- examples of preferred heterocyclic groups represented by Z include, but are not limited to, a pyrrole ring, a pyrazole ring, a triazole ring, an imidazole ring, a thiazole ring, an isothiazole ring, an oxazole ring, an isoxazole ring, A thiadiazole ring, a thiophene ring, a furan ring, a pyridine ring, a pyrimidine ring, an S-triazine ring, a pyridazine ring, and a pyrazine ring.
- Examples of preferred heterocycles are pyridine ring, pyrimidine ring, S-triazine ring, pyridazine ring, pyrazine ring, 1,2,4 thiadiazole ring, 1,3,4 thiadiazole ring, imidazole ring, more preferably pyridine ring.
- Ring, pyrimidine ring, S-triazine ring, pyridazine ring and pyrazine ring, and pyrimidine ring and S-triazine ring are particularly preferred from the viewpoint of hue, tinting strength and image fastness.
- S-triazine ring having a pyrimidine ring having 2 to 4 carbon atoms at the 2-position is preferable from the viewpoint of hue and image fastness, and among them, a pyrimidine ring having a substituent at 4,6- is particularly preferable. And is most preferable from the viewpoint of improving light fastness.
- Z a 6-membered nitrogen-containing heterocycle
- the bis-type azo dye can easily form an intramolecular hydrogen bond with the amino group and the nitrogen-containing 6-membered heterocycle, and the dye molecule arrangement is controlled sterically (at a certain distance). ⁇ It is easy to arrange by angle and flatness.
- W 1 and W 2 each independently represent an alkoxy group, an amino group, an alkyl group, or an aryl group.
- the alkoxy group represented by W 1 or W 2 is preferably a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, and among them, a substituted or unsubstituted alkoxy group having 1 to 8 carbon atoms, among others. Further, a substituted or unsubstituted alkoxy group having 1 to 4 carbon atoms is preferable.
- methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, i-butoxy group, s- Examples include butoxy group, t-butoxy group, n-octyloxy group, 2-methoxyethoxy group and the like.
- Examples of the amino group represented by W 1 and W 2 include an alkylamino group, an arylamino group, and a heterocyclic amino group, preferably an amino group, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms, Examples thereof include substituted or unsubstituted anilino groups having 6 to 30 carbon atoms, including amino groups, substituted or unsubstituted alkylamino groups having 1 to 8 carbon atoms, and substituted or unsubstituted anilino groups having 6 to 18 carbon atoms.
- an amino group, a substituted or unsubstituted alkylamino group having 1 to 4 carbon atoms, and a substituted or unsubstituted anilino group having 6 to 12 carbon atoms are preferable.
- Examples of the alkyl group represented by W 1 and W 2 include linear, branched, and cyclic substituted or unsubstituted alkyl groups, including cycloalkyl groups, bicycloalkyl groups, and tricyclo structures having many ring structures. To do.
- An alkyl group (for example, an alkyl group of an alkoxy group or an alkylthio group) in a substituent described below also represents such an alkyl group.
- the alkyl group is preferably an alkyl group having 1 to 30 carbon atoms, such as a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s -Butyl group, t-butyl group, n-octyl group, eicosyl group, 2-chloroethyl group, 2-cyanoethyl group, 2-ethylhexyl group and the like.
- the cycloalkyl group preferably has 3 to 30 carbon atoms.
- Substituted or unsubstituted cycloalkyl groups such as cyclohexyl group, cyclopentyl group, 4-n-dodecylcyclohexyl group, etc.
- the bicycloalkyl group is preferably a substituted or unsubstituted group having 5 to 30 carbon atoms.
- Bicycloalkyl group that is, a monovalent group obtained by removing one hydrogen atom from a bicycloalkane having 5 to 30 carbon atoms, for example, bicyclo 1,2,2] heptan-2-yl group, a bicyclo [2,2,2] octan-3-yl group.
- the aryl group represented by W 1 or W 2 is preferably a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and among them, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms. Further, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms is preferable, and examples thereof include a phenyl group, a p-tolyl group, a naphthyl group, an m-chlorophenyl group, and an o-hexadecanoylaminophenyl group. .
- W 1 and W 2 are each independently preferably an alkoxy group, an amino group or an alkyl group, particularly preferably an alkoxy group or an amino group, and more preferably an alkoxy group or amino group having a total carbon number of 5 or less.
- (—NH 2 group) an alkylamino group having a total carbon number of 5 or less, particularly preferably an alkoxy group having a total carbon number of 3 or less or an alkylamino group having a total carbon number of 3 or less, of which a methoxy group ( -OCH 3 group) is most preferred.
- W 1 and W 2 are an alkoxy group having 5 or less total carbon atoms, an amino group, or an alkylamino group having 5 or less total carbon atoms
- the dye molecule interacts within and between molecules (hydrogen bond or ⁇ - ⁇ stacking) It is easy to form a solid, and a more stable molecular arrangement structure (for example, a three-dimensional network) can be easily formed, so that good hue and high fastness (for example, light resistance, ozone gas resistance, heat resistance, moisture resistance)
- the methoxy group, ethoxy group, and amino group are preferable from the viewpoint of hue, light fastness, and solvent resistance, and among them, the methoxy group is most preferable from the viewpoint of improving the hue and light fastness.
- R 11 and R 12 each independently represents a hydrogen atom or a substituent.
- the substituent may be a straight chain having 1 to 12 carbon atoms or A branched alkyl group, a linear or branched aralkyl group having 7 to 18 carbon atoms, a linear or branched alkenyl group having 2 to 12 carbon atoms, a linear or branched alkynyl group having 2 to 12 carbon atoms, a carbon number of 3 -12 linear or branched cycloalkyl group, linear or branched cycloalkenyl group having 3 to 12 carbon atoms (eg, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec- Butyl, t-butyl, 2-ethylhexyl, 2-methylsulfonylethyl, 3-phenoxypropyl, tri
- preferred R 11 and R 12 are each independently a substituted or unsubstituted acylamino group having 1 to 8 carbon atoms, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted An unsubstituted aryl group having 6 to 18 carbon atoms, or a substituted or unsubstituted heterocyclic group having 4 to 12 carbon atoms, more preferably a linear or branched alkyl group having 1 to 8 carbon atoms in total.
- R 11 and R 12 a linear alkyl group or branched alkyl group having a small total carbon number (1 to 4), the dye molecule arrangement can be sterically controlled (arranged at a certain distance and angle).
- hue, coloring power, and high image fastness for example, light resistance, ozone gas resistance, heat resistance, moisture resistance.
- G 1 and G 2 each independently represents a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, and particularly preferably a hydrogen atom, a methyl group, an ethyl group, n- Propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, cyclopropyl group, benzyl group, 2-phenethyl group, vinyl group, allyl group, ethynyl group, propargyl Group, phenyl group, p-tolyl group, naphthyl group, pyridyl group, pyrimidinyl group and pyrazinyl group are preferable, and hydrogen atom, methyl group, phenyl group, pyridyl group, pyrimidinyl group and pyra
- Y 1 and Y 2 represent a substituent are a halogen atom, alkyl group, aralkyl group, alkenyl group, alkynyl group, aryl group, heterocyclic group, cyano group, hydroxyl group, nitro group, alkoxy group, aryl Oxy group, silyloxy group, heterocyclic oxy group, acyloxy group, carbamoyloxy group, alkoxycarbonyloxy group, aryloxycarbonyloxy group, amino group, acylamino group, aminocarbonylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group Sulfamoylamino group, alkyl or arylsulfonylamino group, mercapto group, alkylthio group, arylthio group, heterocyclic thio group, sulfamoyl group, alkyl or arylsulfinyl group, alkyl or aryl
- Examples of Y are particularly preferably a hydrogen atom, an alkyl group (for example, a methyl group), an aryl group (for example, a phenyl group), a heterocyclic group (for example, a 2-pyridyl group), and an alkylthio group (for example, a methylthio group). Further, they are a hydrogen atom, a linear or branched alkyl group having 1 to 4 carbon atoms, a phenyl group, and a methylthio group. Further, from the viewpoint of hue and image fastness, a hydrogen atom and a methyl group are preferable, and among them, a hydrogen atom is particularly preferable from the viewpoint of improving hue and light fastness.
- halogen atom alkyl group, aralkyl group, alkenyl group, alkynyl group, aryl group, heterocyclic group, cyano group, hydroxyl group, nitro group, alkoxy group, aryloxy group, silyloxy group, heterocyclic oxy group, acyloxy group , Carbamoyloxy group, alkoxycarbonyloxy group, aryloxycarbonyloxy group, amino group, acylamino group, aminocarbonylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group, sulfamoylamino group, alkyl or arylsulfonylamino group , Mercapto group, alkylthio group, arylthio group, heterocyclic thio group, sulfamoyl group, alkyl or arylsulfinyl group, alkyl or arylsulfonyl group, acyloxy group
- examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkyl group examples include linear, branched, and cyclic substituted or unsubstituted alkyl groups, and include cycloalkyl groups, bicycloalkyl groups, and tricyclo structures having many ring structures.
- An alkyl group (for example, an alkyl group of an alkoxy group or an alkylthio group) in a substituent described below also represents such an alkyl group.
- the alkyl group is preferably an alkyl group having 1 to 30 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, a t-butyl group, an n-octyl group, an eicosyl group.
- the cycloalkyl group is preferably a substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, such as a cyclohexyl group, A cyclopentyl group, 4-n-dodecylcyclohexyl group and the like.
- the bicycloalkyl group is preferably a substituted or unsubstituted bicycloalkyl group having 5 to 30 carbon atoms, that is, a bicycloalkane having 5 to 30 carbon atoms.
- Monovalent groups from which one hydrogen atom has been removed for example, bicyclo [1,2,2] heptan-2-yl group, bicycl [2,2,2] octan-3-yl group.
- aralkyl group examples include a substituted or unsubstituted aralkyl group, and the substituted or unsubstituted aralkyl group is preferably an aralkyl group having 7 to 30 carbon atoms. Examples thereof include a benzyl group and a 2-phenethyl group.
- alkenyl group examples include linear, branched, and cyclic substituted or unsubstituted alkenyl groups, and include cycloalkenyl groups and bicycloalkenyl groups.
- the alkenyl group is preferably a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, such as a vinyl group, an allyl group, a prenyl group, a geranyl group, an oleyl group, and the like.
- bicycloalkenyl group a substituted or unsubstituted bicycloalkenyl group, preferably a substituted or unsubstituted bicycloalkenyl group having 5 to 30 carbon atoms, That is, a monovalent group obtained by removing one hydrogen atom of a bicycloalkene having one double bond, for example, bicyclo [2 2,1] hept-2-en-1-yl group, a bicyclo [2,2,2] oct-2-en-4-yl group and the like.
- the alkynyl group is preferably a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, such as an ethynyl group, a propargyl group, a trimethylsilylethynyl group, and the like.
- the aryl group is preferably a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, such as a phenyl group, a p-tolyl group, a naphthyl group, an m-chlorophenyl group, an o-hexadecanoylaminophenyl group, and the like. Can be mentioned.
- the heterocyclic group is preferably a monovalent group obtained by removing one hydrogen atom from a 5- or 6-membered substituted or unsubstituted aromatic or non-aromatic heterocyclic compound, and more preferably a carbon number.
- Examples thereof include 3 to 30 5- or 6-membered aromatic heterocyclic groups such as a 2-furyl group, a 2-thienyl group, a 2-pyrimidinyl group, and a 2-benzothiazolyl group.
- the alkoxy group is preferably a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, such as a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, an n-butoxy group, an i-butoxy group, Examples thereof include s-butoxy group, t-butoxy group, n-octyloxy group, 2-methoxyethoxy group and the like.
- the aryloxy group is preferably a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, such as a phenoxy group, 2-methylphenoxy group, 4-t-butylphenoxy group, 3-nitrophenoxy group, 2 -Tetradecanoylaminophenoxy group and the like.
- silyloxy group examples include substituted or unsubstituted silyloxy groups having 0 to 20 carbon atoms, such as trimethylsilyloxy group and diphenylmethylsilyloxy group.
- the heterocyclic oxy group is preferably a substituted or unsubstituted heterocyclic oxy group having 2 to 30 carbon atoms, such as a 1-phenyltetrazol-5-oxy group and a 2-tetrahydropyranyloxy group.
- the acyloxy group is preferably a formyloxy group, a substituted or unsubstituted alkylcarbonyloxy group having 2 to 30 carbon atoms, a substituted or unsubstituted arylcarbonyloxy group having 6 to 30 carbon atoms, such as an acetyloxy group, Examples include pivaloyloxy group, stearoyloxy group, benzoyloxy group, p-methoxyphenylcarbonyloxy group and the like.
- the carbamoyloxy group is preferably a substituted or unsubstituted carbamoyloxy group having 1 to 30 carbon atoms, such as N, N-dimethylcarbamoyloxy group, N, N-diethylcarbamoyloxy group, morpholinocarbonyloxy group, N , N-di-n-octylaminocarbonyloxy group, Nn-octylcarbamoyloxy group and the like.
- the alkoxycarbonyloxy group is preferably a substituted or unsubstituted alkoxycarbonyloxy group having 2 to 30 carbon atoms, such as a methoxycarbonyloxy group, an ethoxycarbonyloxy group, a t-butoxycarbonyloxy group, or an n-octylcarbonyloxy group. Etc.
- aryloxycarbonyloxy group a substituted or unsubstituted aryloxycarbonyloxy group having 7 to 30 carbon atoms such as phenoxycarbonyloxy group, p-methoxyphenoxycarbonyloxy group, pn-hexadecyloxy is preferable. Examples include phenoxycarbonyloxy group.
- the amino group includes an alkylamino group, an arylamino group, and a heterocyclic amino group, preferably an amino group, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted group having 6 to 30 carbon atoms.
- the substituted anilino group include a methylamino group, a dimethylamino group, an anilino group, an N-methyl-anilino group, and a diphenylamino group.
- the acylamino group is preferably a formylamino group, a substituted or unsubstituted alkylcarbonylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted arylcarbonylamino group having 6 to 30 carbon atoms, such as an acetylamino group, Examples include pivaloylamino group, lauroylamino group, benzoylamino group, 3,4,5-tri-n-octyloxyphenylcarbonylamino group, and the like.
- the aminocarbonylamino group is preferably a substituted or unsubstituted aminocarbonylamino group having 1 to 30 carbon atoms, such as a carbamoylamino group, N, N-dimethylaminocarbonylamino group, N, N-diethylaminocarbonylamino group. And a morpholinocarbonylamino group.
- the alkoxycarbonylamino group is preferably a substituted or unsubstituted alkoxycarbonylamino group having 2 to 30 carbon atoms, such as a methoxycarbonylamino group, an ethoxycarbonylamino group, a t-butoxycarbonylamino group, or an n-octadecyloxycarbonylamino group. Group, N-methyl-methoxycarbonylamino group and the like.
- the aryloxycarbonylamino group is preferably a substituted or unsubstituted aryloxycarbonylamino group having 7 to 30 carbon atoms, such as phenoxycarbonylamino group, p-chlorophenoxycarbonylamino group, mn-octyloxyphenoxy. Examples thereof include a carbonylamino group.
- the sulfamoylamino group is preferably a substituted or unsubstituted sulfamoylamino group having 0 to 30 carbon atoms, such as a sulfamoylamino group, N, N-dimethylaminosulfonylamino group, Nn- Examples include octylaminosulfonylamino group.
- the alkyl or arylsulfonylamino group is preferably a substituted or unsubstituted alkylsulfonylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted arylsulfonylamino group having 6 to 30 carbon atoms, such as a methylsulfonylamino group.
- the alkylthio group is preferably a substituted or unsubstituted alkylthio group having 1 to 30 carbon atoms, such as a methylthio group, an ethylthio group, and an n-hexadecylthio group.
- the arylthio group is preferably a substituted or unsubstituted arylthio group having 6 to 30 carbon atoms, such as a phenylthio group, a p-chlorophenylthio group, and an m-methoxyphenylthio group.
- heterocyclic thio group examples include substituted or unsubstituted heterocyclic thio groups having 2 to 30 carbon atoms, such as 2-benzothiazolylthio group and 1-phenyltetrazol-5-ylthio group.
- the sulfamoyl group is preferably a substituted or unsubstituted sulfamoyl group having 0 to 30 carbon atoms, such as N-ethylsulfamoyl group, N- (3-dodecyloxypropyl) sulfamoyl group, N, N-dimethylsulfuryl group.
- Examples include a famoyl group, an N-acetylsulfamoyl group, an N-benzoylsulfamoyl group, and an N- (N′-phenylcarbamoyl) sulfamoyl group.
- the alkyl or arylsulfinyl group is preferably a substituted or unsubstituted alkylsulfinyl group having 1 to 30 carbon atoms, a substituted or unsubstituted arylsulfinyl group having 6 to 30 carbon atoms, such as a methylsulfinyl group, an ethylsulfinyl group, phenyl. Examples thereof include a sulfinyl group and a p-methylphenylsulfinyl group.
- the alkyl or arylsulfonyl group is preferably a substituted or unsubstituted alkylsulfonyl group having 1 to 30 carbon atoms, a substituted or unsubstituted arylsulfonyl group having 6 to 30 carbon atoms, such as a methylsulfonyl group, an ethylsulfonyl group, or a phenyl group. Examples thereof include a sulfonyl group and a p-methylphenylsulfonyl group.
- the acyl group is preferably a formyl group, a substituted or unsubstituted alkylcarbonyl group having 2 to 30 carbon atoms, a substituted or unsubstituted arylcarbonyl group having 7 to 30 carbon atoms, a substituted or unsubstituted group having 2 to 30 carbon atoms.
- Heterocyclic carbonyl groups bonded to carbonyl groups at substituted carbon atoms eg, acetyl, pivaloyl, 2-chloroacetyl, stearoyl, benzoyl, pn-octyloxyphenylcarbonyl, 2-pyridyl
- Examples thereof include a carbonyl group and a 2-furylcarbonyl group.
- the aryloxycarbonyl group is preferably a substituted or unsubstituted aryloxycarbonyl group having 7 to 30 carbon atoms, such as a phenoxycarbonyl group, an o-chlorophenoxycarbonyl group, an m-nitrophenoxycarbonyl group, pt- A butylphenoxycarbonyl group etc. are mentioned.
- the alkoxycarbonyl group is preferably a substituted or unsubstituted alkoxycarbonyl group having 2 to 30 carbon atoms, such as a methoxycarbonyl group, an ethoxycarbonyl group, a t-butoxycarbonyl group, and an n-octadecyloxycarbonyl group.
- the carbamoyl group is preferably a substituted or unsubstituted carbamoyl group having 1 to 30 carbon atoms, such as a carbamoyl group, an N-methylcarbamoyl group, an N, N-dimethylcarbamoyl group, or an N, N-di-n-octyl group.
- a carbamoyl group, an N- (methylsulfonyl) carbamoyl group, and the like can be given.
- the aryl or heterocyclic azo group is preferably a substituted or unsubstituted arylazo group having 6 to 30 carbon atoms, a substituted or unsubstituted heterocyclic azo group having 3 to 30 carbon atoms, such as phenylazo, p-chlorophenylazo, 5-ethylthio-1,3,4-thiadiazol-2-ylazo and the like.
- Preferred examples of the imide group include an N-succinimide group and an N-phthalimide group.
- the phosphino group is preferably a substituted or unsubstituted phosphino group having 0 to 30 carbon atoms, such as a dimethylphosphino group, a diphenylphosphino group, a methylphenoxyphosphino group, and the like.
- the phosphinyl group is preferably a substituted or unsubstituted phosphinyl group having 0 to 30 carbon atoms, such as a phosphinyl group, a dioctyloxyphosphinyl group, a diethoxyphosphinyl group, and the like.
- the phosphinyloxy group is preferably a substituted or unsubstituted phosphinyloxy group having 0 to 30 carbon atoms, such as a diphenoxyphosphinyloxy group and a dioctyloxyphosphinyloxy group.
- the phosphinylamino group is preferably a substituted or unsubstituted phosphinylamino group having 0 to 30 carbon atoms, such as a dimethoxyphosphinylamino group or a dimethylaminophosphinylamino group.
- silyl group examples include substituted or unsubstituted silyl groups having 0 to 30 carbon atoms, such as a trimethylsilyl group, a t-butyldimethylsilyl group, and a phenyldimethylsilyl group.
- substituents those having a hydrogen atom may be substituted with the above substituent.
- substituents include an alkylcarbonylaminosulfonyl group, an arylcarbonylaminosulfonyl group, an alkylsulfonylaminocarbonyl group, and an arylsulfonylaminocarbonyl group.
- substituents include a methylsulfonylaminocarbonyl group, a p-methylphenylsulfonylaminocarbonyl group, an acetylaminosulfonyl group, and a benzoylaminosulfonyl group.
- a compound in which at least one of various substituents is the above preferred group is preferred, and more various substituents are preferred. More preferred are compounds that are groups, and most preferred are compounds in which all substituents are the preferred groups.
- a particularly preferred combination as the azo pigment represented by the general formula (1) of the present invention includes the following (A) to (E).
- Z represents a divalent heterocyclic group, which may be further condensed.
- Z is preferably a 5- to 6-membered heterocyclic group, more preferably a 5- or 6-membered substituted or unsubstituted nitrogen-containing heterocyclic ring, and a 6-membered substituted or unsubstituted nitrogen-containing heterocyclic ring is preferred. .
- heterocyclic ring are a pyridine ring, a pyrimidine ring, an S-triazine ring, a pyridazine ring and a pyrazine ring, more preferably a pyridine ring, a pyrimidine ring, an S-triazine ring, a pyridazine ring and a pyrazine ring.
- a pyrimidine ring and an S-triazine ring More preferred are a pyrimidine ring and an S-triazine ring, and particularly preferred are a pyrimidine ring and an S-triazine ring, and further a pyrimidine ring having a substituent at 4,6- and an alkoxy group having 1 to 4 carbon atoms at the 2-position.
- the S-triazine ring is preferable, and among them, a pyrimidine ring having a substituent at 4,6- is most preferable.
- W 1 and W 2 are each independently an alkoxy group (eg, methoxy group, ethoxy group, i-propoxy group, t-butoxy group), amino group (eg, —NH 2 group, methylamino group, dimethyl group) Amino group, anilino group), alkyl group (for example, methyl group, ethyl group, n-propyl group, i-propyl group, t-butyl group, cyclopropyl group) or aryl group (for example, phenyl group, p-tolyl group) , A naphthyl group), preferably an alkoxy group, an amino group or an alkyl group, more preferably an alkoxy group or an amino group, more preferably an alkoxy group having 5 or less carbon atoms, an amino group (—NH 2 group).
- alkoxy group eg, methoxy group, ethoxy group, i-propoxy group, t-butoxy group
- An alkylamino group having a total carbon number of 8 or less particularly preferably an alkoxy group having a total carbon number of 3 or less (for example, methoxy group, ethoxy group), amino Group (-NH 2 group), a total carbon number of 6 or less alkylamino group (e.g., -NHCH 3 group, -N (CH 3) 2 group), and further, a methoxy group (-OCH 3 group), an ethoxy group (—OC 2 H 5 group) and amino group (—NH 2 group) are preferable, and methoxy group (—OCH 3 group) is most preferable among them.
- an alkoxy group having a total carbon number of 3 or less for example, methoxy group, ethoxy group), amino Group (-NH 2 group), a total carbon number of 6 or less alkylamino group (e.g., -NHCH 3 group, -N (CH 3) 2 group), and further, a methoxy group (-OCH 3 group), an e
- R 11 and R 12 are each independently a hydrogen atom or a substituent (for example, a substituted or unsubstituted acylamino group having 1 to 8 carbon atoms in total, substituted or unsubstituted alkyl having 1 to 12 carbon atoms in total) Group, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, or a substituted or unsubstituted heterocyclic group having 4 to 12 carbon atoms in total, more preferably a straight chain having 1 to 8 carbon atoms in total.
- a substituent for example, a substituted or unsubstituted acylamino group having 1 to 8 carbon atoms in total, substituted or unsubstituted alkyl having 1 to 12 carbon atoms in total
- a substituted or unsubstituted aryl group having 6 to 18 carbon atoms or a substituted or unsubstituted heterocyclic group having 4 to 12 carbon atoms in total
- alkyl group or a branched alkyl group more preferably a methyl group, an i-propyl group or a t-butyl group, particularly preferably an i-propyl group or a t-butyl group, and most preferably a t-butyl group.
- G 1 and G 2 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, and particularly preferably a hydrogen atom, a methyl group, or an ethyl group.
- a pyridyl group, a pyrimidinyl group and a pyrazinyl group are preferable, and a hydrogen atom, a methyl group, a phenyl group, a pyridyl group, a pyrimidinyl group and a pyrazinyl group are preferable, and among them, a linear alkyl group or a branched alkyl group having 1 to 8 carbon atoms in total 2-pyridyl group, 2,6-pyrimidinyl group, and 2,5-pyrazinyl group are preferable, and an alkyl group having a total carbon number of 3
- Y 1 and Y 2 are a hydrogen atom, an alkyl group (for example, a methyl group), an aryl group (for example, a phenyl group), a heterocyclic group (for example, a 2-pyridyl group), or an alkylthio group (for example, a methylthio group).
- a hydrogen atom, a linear or branched alkyl group having 1 to 4 carbon atoms, a phenyl group, and a methylthio group particularly preferably a hydrogen atom and a methyl group, and most preferably a hydrogen atom.
- the azo pigment represented by the general formula (1) is preferably an azo pigment represented by the following general formula (2).
- Z ′ represents a 6-membered nitrogen-containing heterocycle
- R 11 and R 12 each independently represent a hydrogen atom or a substituent
- W 1 ′ and W 2 ′ each independently represent a total number.
- Z ′ represents a 6-membered nitrogen-containing heterocycle, which may be further condensed.
- Z is preferably a 6-membered nitrogen-containing heterocyclic group containing 1 to 3 substituted or unsubstituted nitrogen atoms, more preferably a 6-membered nitrogen containing 2 to 3 substituted or unsubstituted nitrogen atoms
- a heterocyclic group particularly preferably a substituted or unsubstituted pyrimidine ring, pyrazine ring, pyridazine ring, or S-triazine ring, without restricting the connecting position.
- W 1 ′ and W 2 ′ each independently represent an alkoxy group having 3 or less carbon atoms, an amino group, or an alkylamino group having 6 or less carbon atoms.
- Preferred alkoxy groups represented as W 1 ′ and W 2 ′ include a methoxy group (—OCH 3 ), an ethoxy group (—OC 2 H 5 ), an n-propoxy group ⁇ —O (CH 2 ) 2 CH 3 ⁇ I-propoxy ⁇ -OCH (CH 3 ) 2 ⁇ group and the like.
- Preferred amino groups represented by W 1 ′ and W 2 ′ and alkylamino groups having a total carbon number of 6 or less include amino groups (—NH 2 ), methylamino groups (—NHCH 3 ), dimethylamino groups ⁇ —N ( CH 3 ) 2 ⁇ , ethylamino group (—NHC 2 H 5 ), methylethylamino group ⁇ —N (CH 3 ) (C 2 H 5 ) ⁇ , diethylamino group ⁇ —N (C 2 H 5 ) 2 ⁇ , etc. Is mentioned.
- R 1 and R 2 each independently represent a hydrogen atom or a substituent.
- Preferred examples represented by R 1 and R 2 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, or A substituted or unsubstituted heterocyclic group having 4 to 12 carbon atoms in total, more preferably a straight-chain alkyl group or branched alkyl group having 1 to 6 carbon atoms in total, a methyl group, an ethyl group, n- Propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group or t-butyl group is preferable, i-propyl group or t-butyl group is particularly preferable, and among them, t-butyl group is particularly preferable. Is most preferred.
- a compound in which at least one of various substituents is the above-mentioned preferred group is preferred, and more various substituents are preferred. More preferred are compounds that are groups, and most preferred are compounds in which all substituents are the preferred groups.
- a particularly preferred combination as the azo pigment represented by the general formula (2) of the present invention includes the following (A) to (C).
- Z ′ represents a divalent 6-membered nitrogen-containing heterocyclic group, preferably a 6-membered nitrogen-containing heterocyclic group containing 1 to 3 substituted or unsubstituted nitrogen atoms, more preferably A 6-membered nitrogen-containing heterocyclic group containing 2 to 3 substituted or unsubstituted nitrogen atoms, particularly preferably a substituted or unsubstituted pyrimidine ring, pyrazine ring, pyridazine ring; , S-triazine ring.
- W 1 ′ and W 2 ′ each independently represent an alkoxy group having 3 or less carbon atoms, an amino group, or an alkylamino group having 6 or less carbon atoms.
- Preferred alkoxy groups include a methoxy group (—OCH 3 ), an ethoxy group (—OC 2 H 5 ), an n-propoxy group ⁇ —O (CH 2 ) 2 CH 3 ⁇ , an i-propoxy ⁇ —OCH (CH 3 ) 2 ⁇ group, and a preferred amino group
- the alkylamino group having a total carbon number of 6 or less includes an amino group (—NH 2 ), a methylamino group (—NHCH 3 ), a dimethylamino group ⁇ —N (CH 3 ) 2 ⁇ , an ethylamino group (—NHC 2 H 5 ), A methylethylamino group ⁇ —N (CH 3 ) (C 2 H 5 ) ⁇ , a diethylamino group ⁇
- R 11 and R 12 each independently represent a hydrogen atom or a substituent, preferably a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, a substituted or unsubstituted total An aryl group having 6 to 18 carbon atoms, or a substituted or unsubstituted heterocyclic group having 4 to 12 carbon atoms in total, more preferably a linear alkyl group or a branched alkyl group having 1 to 6 carbon atoms in total.
- a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, an s-butyl group or a t-butyl group is preferable, and an i-propyl group or a t-butyl group is particularly preferable. Among them, a t-butyl group is most preferable.
- the azo pigment represented by the general formula (2) is preferably an azo pigment represented by the following formula (3) or (4).
- the azo pigment represented by the formula (3) is an azo pigment having characteristic X-ray diffraction peaks at CuK ⁇ characteristic X-ray diffraction with Bragg angles (2 ⁇ ⁇ 0.2 °) of 7.2 ° and 25.9 °.
- a pigment or a tautomer is preferable.
- the azo pigment represented by the formula (3) and its tautomer are characterized by Bragg angles (2 ⁇ ⁇ 0.2 °) of 7.2 ° and 25.9 ° in CuK ⁇ characteristic X-ray diffraction.
- Crystal forms having X-ray diffraction peaks are preferred, and crystal forms having characteristic X-ray diffraction peaks at 7.2 °, 15.0 °, 19.8 ° and 25.9 ° are more preferred.
- crystal forms having characteristic X-ray diffraction peaks at 7.2 °, 8.2 °, 10.0 °, 13.4 °, 15.0 °, 19.8 ° and 25.9 ° are present. Most preferred.
- the azo pigment represented by the formula (4) has characteristic X-rays with Bragg angles (2 ⁇ ⁇ 0.2 °) in CuK ⁇ characteristic X-ray diffraction of 7.6 °, 25.6 ° and 27.7 °.
- An azo pigment having a diffraction peak or a tautomer is preferable.
- the azo pigment represented by the formula (4) and its tautomer have Bragg angles (2 ⁇ ⁇ 0.2 °) in CuK ⁇ characteristic X-ray diffraction of 7.6 °, 25.6 ° and 27.7.
- a crystal form having an X-ray diffraction peak characteristic at ° is preferable, and a crystal form having X-ray diffraction peaks characteristic at 7.6 °, 13.5 °, 25.6 ° and 27.7 ° is further preferable. More preferred.
- a crystal form having characteristic X-ray diffraction peaks at 7.6 °, 13.5 °, 15.9 °, 16.9 °, 25.6 ° and 27.7 ° is most preferable.
- the X-ray diffraction measurement of the azo pigments represented by the above general formula (1), general formula (2), formula (3) and formula (4) is performed using Japanese Industrial Standards JISK0131 (X-ray diffraction analysis).
- the measurement can be performed with a powder X-ray diffraction measurement device RINT2500 (manufactured by Rigaku Corporation).
- the length in the major axis direction when the primary particles of the azo pigment represented by the general formula (1), the general formula (2), the formula (3), and the formula (4) are observed with a transmission microscope It is preferably from 0.01 ⁇ m to 30 ⁇ m, more preferably from 0.02 ⁇ m to 10 ⁇ m, and most preferably from 0.03 ⁇ m to 1 ⁇ m.
- the fastness to light and ozone, and the dispersibility when used as a pigment dispersion are more reliable. Can be expressed.
- the particle size is 30 ⁇ m or less, it is difficult to be in an overdispersed state (a form in which primary particles are destroyed) when dispersed to have a desired volume average particle diameter, and the active surface is not easily exposed on the surface of pigment particles. Therefore, aggregation is difficult to occur, so that the storage stability of the pigment dispersion can be expressed more reliably.
- the pigment dispersion exhibits high fastness to light and ozone, and the pigment dispersion is excellent in storage stability and is preferable.
- azo pigments represented by the general formulas (1) and (2) are shown below, but the azo compounds of the azo pigments used in the present invention are not limited to the following examples. Absent. The structures of the following specific examples are shown in the form of an ultimate structural formula among several tautomers that can be taken in terms of chemical structure, but may be tautomeric structures other than those described. Needless to say.
- the azo pigments represented by the above general formulas (1) to (4) preferably have a substituent that forms an intramolecular hydrogen bond or an intramolecular cross-hydrogen bond. It preferably has at least one substituent that forms an intramolecular hydrogen bond, more preferably has at least three substituents that form an intramolecular hydrogen bond, and at least three intramolecular hydrogens. It is particularly preferred that the group has a substituent that forms a bond, and at least two of these hydrogen bonds have a substituent that forms an intramolecular cross-hydrogen bond.
- the pigments represented by the general formulas (1) to (4) of the present invention may have any chemical form whose chemical structural formulas are the general formulas (1) to (4) or tautomers thereof and are also called polymorphs. It may be a pigment.
- Crystal polymorphs have the same chemical composition but different arrangement of building blocks (molecules or ions) in the crystal.
- the crystal structure determines the chemical and physical properties, and each polymorph can be distinguished by its rheology, color, and other color characteristics. Different polymorphs can also be confirmed by X-Ray Diffraction (powder X-ray diffraction measurement result) or X-Ray Analysis (X-ray crystal structure analysis result).
- any polymorph may be used, and a mixture of two or more polymorphs may be used.
- the main component is preferably a single crystal type. That is, it is preferable that the polymorph is not mixed, and the content of the azo pigment having a single crystal type is 70% to 100%, preferably 80% to 100%, more preferably 90% with respect to the entire azo pigment. To 100%, more preferably 95% to 100, particularly preferably 100%.
- the mixing ratio of crystal polymorphs in azo pigments is based on solid physicochemical measurements such as single crystal X-ray crystal structure analysis, powder X-ray diffraction (XRD), crystal micrograph (TEM), IR (KBr method), etc. I can confirm.
- the azo pigments represented by the general formulas (1) and (2) when the azo pigments represented by the general formulas (1) and (2) have an acid group, a part or all of the acid group may be in a salt form, A pigment and a free acid type pigment may be mixed.
- the salt type include salts of alkali metals such as Na, Li, and K, ammonium salts that may be substituted with alkyl groups or hydroxyalkyl groups, and organic amine salts.
- organic amines include lower alkyl amines, hydroxy substituted lower alkyl amines, carboxy substituted lower alkyl amines, and polyamines having 2 to 10 alkyleneimine units having 2 to 4 carbon atoms.
- the type is not limited to one type, and a plurality of types may be mixed.
- the plurality of acid groups when a plurality of acid groups are contained in one molecule, the plurality of acid groups may be salt type or acid type and may be different from each other.
- the azo pigment represented by the general formula (1) may be a hydrate containing water molecules in the crystal.
- the heterocyclic amine represented by the following general formula (A) is diazonium under acidic conditions, subjected to a coupling reaction with a compound represented by the following general formula (B), followed by post-treatment by a conventional method, An azo pigment represented by the formula (1) can be produced.
- W, Y, G, R 11 , R 12 and Z represent W 1 , W 2 , Y 1 , Y 2 , G 1 , G in the general formula (1). 2 , R 11 , R 12 and Z are synonymous.
- heterocyclic amines represented by the above general formula (A) are generally known and commonly used methods such as those described in Helv. Chim. Acta, 41, 1958, 1052-1056 and Helv. Chim. Acta, 42, 1959, 349 to 352 and the like, and methods similar thereto.
- the compound represented by the general formula (B) can be produced by a method described in International Publication No. 06/082669 or JP-A-2006-57076 and a method analogous thereto.
- Preparation of the diazonium salt of the heterocyclic amine represented by the above formula (A) can be performed in a reaction medium containing an acid (for example, hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, methanesulfonic acid, trifluoromethanesulfonic acid, etc.).
- an acid for example, hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, propionic acid, methanesulfonic acid, trifluoromethanesulfonic acid, etc.
- a conventional diazonium salt preparation method using a nitrosonium ion source such as nitrous acid, nitrite or nitrosylsulfuric acid can be applied.
- Examples of more preferred acids include the case where acetic acid, propionic acid, methanesulfonic acid, phosphoric acid and sulfuric acid are used alone or in combination, among which phosphoric acid or a combined system of acetic acid and sulfuric acid, acetic acid and propion A combined system of acid, a combined system of acetic acid, propionic acid and sulfuric acid is more preferable, and a combined system of acetic acid and propionic acid and a combined system of acetic acid, propionic acid and sulfuric acid are particularly preferable.
- reaction medium organic acids and inorganic acids are preferably used, and phosphoric acid, sulfuric acid, acetic acid, propionic acid, and methanesulfonic acid are particularly preferable. Among these, acetic acid and propionic acid are preferable.
- nitrosonium ion sources examples include nitrites, nitrites, nitrosylsulfuric acid and the like.
- sodium nitrite, potassium nitrite, isoamyl nitrite, nitrosylsulfuric acid (e.g., ONHSO 4 sulfuric acid solution) are preferred, isoamyl nitrite, nitrosylsulfuric acid (e.g., 40 wt% to 50 wt% ONHSO 4 sulfuric acid solution)
- the use of nitrosylsulfuric acid in the above-mentioned preferable acid-containing reaction medium can prepare a diazonium salt stably and efficiently.
- the amount of the solvent used for the diazo component of the formula (A) is preferably 0.5 to 50 times by mass, more preferably 1 to 20 times by mass, and particularly preferably 3 to 15 times by mass.
- the diazo component of the formula (A) may be in a state of being dispersed in a solvent, or may be in a solution state depending on the kind of the diazo component.
- the amount of the nitrosonium ion source used is preferably 0.95 to 5.0 equivalents, more preferably 1.00 to 3.00 equivalents, particularly 1.00 to 1.10 equivalents, relative to the diazo component. Is preferred.
- the reaction temperature is preferably ⁇ 15 ° C. to 40 ° C., more preferably ⁇ 5 ° C. to 35 ° C., and still more preferably 0 ° C. to 30 ° C. Below -15 ° C, the reaction rate is remarkably slow and the time required for the synthesis is remarkably long, which is not economical. When synthesis is performed at a high temperature exceeding 40 ° C, the amount of by-products increases, which is preferable. Absent.
- the reaction time is preferably 30 minutes to 300 minutes, more preferably 30 minutes to 200 minutes, and still more preferably 30 minutes to 150 minutes.
- the step of coupling reaction can be carried out in an acidic reaction medium to a basic reaction medium, but the azo pigment of the present invention is preferably carried out in an acidic to neutral reaction medium, particularly in an acidic reaction medium. It is preferable to carry out the step because the decomposition of the diazonium salt can be suppressed and the azo pigment can be efficiently derived.
- reaction medium an organic acid, an inorganic acid, or an organic solvent
- an organic solvent is particularly preferable, and a solvent that does not cause a liquid separation phenomenon during the reaction and presents a uniform solution with the solvent. preferable.
- alcoholic organic solvents such as methanol, ethanol, propanol, isopropanol, butanol, t-butyl alcohol, amyl alcohol, ketone organic solvents such as acetone, methyl ethyl ketone, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene Diol organic solvents such as glycol and 1,3-propanediol, ether organic solvents such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol diethyl ether, tetrahydrofuran, dioxane, acetonitrile, and the like. May be a mixture of two or more.
- the organic solvent has a polarity parameter (ET) value of 40 or more.
- ET polarity parameter
- a glycol solvent having two or more hydroxyl groups in the solvent molecule an alcohol solvent having 3 or less carbon atoms, or a ketone solvent having a total carbon number of 5 or less is preferable, more preferably 2 carbon atoms.
- the following alcohol solvents for example, methanol and ethylene glycol
- ketone solvents having a total carbon number of 4 or less for example, acetone and methyl ethyl ketone. These mixed solvents are also preferred.
- the amount of the solvent used is preferably 1 to 100 times by mass, more preferably 1 to 50 times by mass, and still more preferably 2 to 30 times by mass of the coupling component represented by the general formula (B).
- the coupling component represented by the general formula (B) may be in a state of being dispersed in a solvent, or may be in a state of a solution depending on the type of the coupling component.
- the amount of the coupling component used is preferably from 0.95 to 5.0 equivalents, more preferably from 1.00 to 3.00 equivalents, particularly from 1.00 to 1.50, based on the azo coupling site. It is preferable that it is equivalent.
- the reaction temperature is preferably ⁇ 30 ° C. to 30 ° C., more preferably ⁇ 15 ° C. to 10 ° C., and further preferably ⁇ 10 ° C. to 5 ° C. Less than ⁇ 30 ° C. is not economical because the reaction rate is remarkably slow and the time required for the synthesis becomes remarkably long. Also, when synthesis is performed at a high temperature exceeding 30 ° C., the amount of by-products increases, which is preferable. Absent.
- the reaction time is preferably 30 minutes to 300 minutes, more preferably 30 minutes to 200 minutes, and still more preferably 30 minutes to 150 minutes.
- the product (crude azo pigment) obtained by these reactions is treated according to a post-treatment method of a normal organic synthesis reaction and then purified or used without purification. be able to.
- the product liberated from the reaction system can be used without being purified, or can be purified by recrystallization, salt formation or the like alone or in combination.
- reaction solvent is distilled off, or it is poured into water or ice without being distilled off, and the liberated product is extracted with an organic solvent or an aqueous solution, neutralized or not neutralized. It can also be used after purification or refining by recrystallization, crystallization, salt formation or the like, either alone or in combination.
- the production method of the azo pigment composition of the present invention includes a coupling reaction between a diazonium compound obtained by diazonium-izing a heterocyclic amine represented by the general formula (A) and a compound represented by the general formula (B).
- the compound represented by the general formula (B) is dissolved in an organic solvent, and then a coupling reaction is performed.
- the diazonium salt preparation reaction of the heterocyclic amine represented by the general formula (A) is carried out at a temperature of 15 ° C. or less with a reagent such as sodium nitrite and nitrosylsulfuric acid in an acidic solvent such as sulfuric acid, phosphoric acid and acetic acid.
- the reaction can be carried out for about 10 minutes to 6 hours.
- the coupling reaction is performed by reacting the diazonium salt obtained by the above-described method with the compound represented by the general formula (B) at 40 ° C. or less, preferably 15 ° C. or less for about 10 minutes to 12 hours. Is preferred.
- a method for producing a pigment composition mainly composed of the crystal of formula (3) having a characteristic X-ray diffraction peak for example, the compound represented by the general formula (B) is once dissolved in an organic solvent. It is preferable to use the method of the present invention in which a coupling reaction is performed after that.
- the organic solvent that can be used at this time include alcohol solvents and ketone solvents.
- alcohol solvent methanol, ethanol, isopropanol, ethylene glycol, diethylene glycol and the like are preferable, and methanol is particularly preferable among them.
- ketone solvent acetone, methyl ethyl ketone, cyclohexanone and the like are preferable, and acetone is particularly preferable among them.
- Another method for producing an azo pigment composition of the present invention is the coupling of a diazonium compound obtained by diazonium-izing a heterocyclic amine represented by the above general formula (A) and a compound represented by the above general formula (B).
- the coupling reaction is performed in the presence of a polar aprotic solvent.
- polar aprotic solvents examples include N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide, tetramethylurea, acetone, methyl ethyl ketone, acetonitrile, and mixed solvents thereof Etc.
- these solvents acetone, methyl ethyl ketone, N, N-dimethylacetamide, and acetonitrile are particularly preferable.
- the compound represented by the general formula (2) or (3) may or may not be completely dissolved in the solvent.
- the compound obtained by the above production method may or may not be adjusted to pH by adding a base as a purification step.
- the pH is preferably 4 to 10.
- pH of 5 to 8 is more preferable, and pH of 5.5 to 7.5 is particularly preferable.
- the pH is 10 or less, it is preferable from the viewpoint of ensuring a hue of a certain quality without causing discoloration or fading from the viewpoint of hue, without increasing redness.
- the pH is 4 or more, for example, when used as an inkjet recording ink, it is preferable because problems such as corrosion of the nozzle hardly occur.
- the compounds represented by the general formulas (1), (2) and (3) are obtained as crude azo pigments (crude).
- the present invention also relates to an azo pigment composition produced by the above production method.
- post-treatment process In the manufacturing method of this invention, it is preferable to include the process of performing a post-process.
- a post-treatment step for example, solvent particle milling process such as solvent salt milling, salt milling, dry milling, solvent milling, acid pasting, pigment heat control process, solvent heating treatment, etc., resin, surfactant and dispersion And a surface treatment step using an agent.
- the compounds represented by the above general formulas (1), (2) and (3) of the present invention are preferably subjected to solvent heat treatment, solvent salt milling or both as post-treatment steps.
- an azo pigment having a desired crystal form can be produced by refluxing in an organic solvent excluding water.
- Examples of the solvent used in the solvent heat treatment include water, aromatic hydrocarbon solvents such as toluene and xylene, halogenated hydrocarbon solvents such as chlorobenzene and o-dichlorobenzene, and alcohols such as isopropanol and isobutanol.
- Examples include solvents, polar aprotic organic solvents such as N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, acetone, methyl ethyl ketone, and acetonitrile, glacial acetic acid, pyridine, or a mixture thereof. It is done.
- An inorganic or organic acid or base may be further added to the solvents mentioned above.
- the temperature of the solvent heat treatment varies depending on the desired primary particle size of the pigment, but is preferably 40 to 150 ° C., more preferably 60 to 100 ° C.
- the treatment time is preferably 30 minutes to 24 hours.
- Solvent salt milling includes, for example, charging a crude azo pigment, an inorganic salt, and an organic solvent that does not dissolve it into a kneader, and kneading and grinding therein.
- a water-soluble inorganic salt can be preferably used.
- an inorganic salt such as sodium chloride, potassium chloride, sodium sulfate is preferably used. It is more preferable to use an inorganic salt having an average particle size of 0.5 to 50 ⁇ m.
- the amount of the inorganic salt used is preferably 3 to 20 times by mass, more preferably 5 to 15 times by mass with respect to the crude azo pigment.
- organic solvent a water-soluble organic solvent can be suitably used, and the solvent easily evaporates due to a temperature rise during kneading, so that a high boiling point solvent is preferable from the viewpoint of safety.
- organic solvents include diethylene glycol, glycerin, ethylene glycol, propylene glycol, liquid polyethylene glycol, liquid polypropylene glycol, 2- (methoxymethoxy) ethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol, triethylene glycol monomethyl ether, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, di Propylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monomethyl ether, dipropylene Glycol or mixtures thereof.
- the amount of the water-soluble organic solvent used is preferably 0.1 to 5 times by mass with respect to the crude azo pigment.
- the kneading temperature is preferably 20 to 130 ° C, particularly preferably 40 to 110 ° C.
- a kneader for example, a kneader or a mix muller can be used.
- the pigment dispersion of the present invention comprises at least one of the azo pigments of the present invention represented by the above general formula (1), their tautomers, salts or hydrates thereof, and more preferably The azo pigment of the present invention represented by the above general formula (2) or (3) is used. Thereby, it can be set as the pigment dispersion excellent in chromatic characteristics, durability, and dispersion stability.
- the pigment dispersion of the present invention may be aqueous or non-aqueous, but is preferably an aqueous pigment dispersion.
- aqueous liquid in which the pigment is dispersed in the aqueous pigment dispersion of the present invention a mixture containing water as a main component and optionally adding a hydrophilic organic solvent can be used.
- hydrophilic organic solvent examples include alcohols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, t-butanol, pentanol, hexanol, cyclohexanol, benzyl alcohol, ethylene glycol, diethylene glycol, and the like.
- Alcohols such as triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, butylene glycol, hexanediol, pentanediol, glycerin, hexanetriol, thiodiglycol, ethylene glycol monomethyl ether, ethylene glycol mono Ethyl ether, ethylene glycol butyl ether, diethylene glycol mono Chill ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, triethylene glycol monomethyl ether, ethylene glycol diacetate, ethylene glycol monomethyl ether acetate triethylene glycol monoethyl ether, ethylene glycol monophenyl ether Glycol derivatives such as ethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine, N-ethyldiethanolamine, ethylene
- the aqueous pigment dispersion of the present invention may contain an aqueous resin.
- the aqueous resin include a water-soluble resin that dissolves in water, a water-dispersible resin that disperses in water, a colloidal dispersion resin, or a mixture thereof.
- Specific examples of the aqueous resin include acrylic, styrene-acrylic, polyester, polyamide, polyurethane, and fluorine resins.
- surfactants and dispersants may be used to improve pigment dispersion and image quality.
- the surfactant include anionic, nonionic, cationic, and zwitterionic surfactants. Any surfactant may be used, but anionic or nonionic surfactants may be used. It is preferable to use it.
- the anionic surfactant include fatty acid salts, alkyl sulfate esters, alkylbenzene sulfonates, alkyl naphthalene sulfonates, dialkyl sulfosuccinates, alkyl diaryl ether disulfonates, alkyl phosphates, and polyoxyethylene alkyls.
- Examples thereof include ether sulfate, polyoxyethylene alkylaryl ether sulfate, naphthalenesulfonic acid formalin condensate, polyoxyethylene alkyl phosphate ester salt, glycerol borate fatty acid ester, polyoxyethylene glycerol fatty acid ester and the like.
- Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene oxypropylene block copolymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerin.
- examples include fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene alkylamines, fluorine-based resins, and silicon-based resins.
- the non-aqueous pigment dispersion is obtained by dispersing the pigment represented by the above general formula (1), general formula (2), and formula (3) in a non-aqueous vehicle.
- Resins used in non-aqueous vehicles are, for example, petroleum resins, casein, shellac, rosin modified maleic resin, rosin modified phenolic resin, nitrocellulose, cellulose acetate butyrate, cyclized rubber, chlorinated rubber, oxidized rubber, hydrochloric acid rubber , Phenolic resin, alkyd resin, polyester resin, unsaturated polyester resin, amino resin, epoxy resin, vinyl resin, vinyl chloride, vinyl chloride-vinyl acetate copolymer, acrylic resin, methacrylic resin, polyurethane resin, silicone resin, fluorine resin , Drying oil, synthetic drying oil, styrene / maleic acid resin, styrene / acrylic resin, polyamide resin, polyimide resin, benzoguanamine resin, melamine resin, urea resin
- Examples of the solvent used in the non-aqueous vehicle include aromatic solvents such as toluene, xylene, and methoxybenzene, and acetates such as ethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate.
- aromatic solvents such as toluene, xylene, and methoxybenzene
- acetates such as ethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate.
- Solvents propionate solvents such as ethoxyethyl propionate, alcohol solvents such as methanol and ethanol, ether solvents such as butyl cellosolve, propylene glycol monomethyl ether, diethylene glycol ethyl ether, diethylene glycol dimethyl ether, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.
- Ketone solvents aliphatic hydrocarbon solvents such as hexane, N, N-dimethylformamide, ⁇ -butyrolactam, - methyl-2-pyrrolidone, aniline, nitrogen compound-based solvent such as pyridine, a lactone-based solvents such as ⁇ - butyrolactone, carbamic acid esters such as a mixture of 48:52 of methyl carbamate and ethyl carbamate acid.
- the pigment dispersion of the present invention can be obtained by dispersing the above azo pigment and an aqueous or non-aqueous medium using a dispersing device.
- Dispersing devices include simple stirrer, impeller stirring method, in-line stirring method, mill method (for example, colloid mill, ball mill, sand mill, bead mill, attritor, roll mill, jet mill, paint shaker, agitator mill, etc.), ultrasonic method
- a high-pressure emulsification dispersion system high-pressure homogenizer; specific commercially available devices such as gorin homogenizer, microfluidizer, DeBEE2000, etc.
- the volume average particle diameter of the pigment is preferably 0.01 ⁇ m to 0.2 ⁇ m.
- the volume average particle diameter of the pigment particles refers to the particle diameter of the pigment itself or the particle diameter to which the additive has adhered when an additive such as a dispersant is attached to the colorant.
- a Nanotrac UPA particle size analyzer (UPA-EX150; manufactured by Nikkiso Co., Ltd.) was used as a measuring device for the volume average particle diameter of the pigment. The measurement was performed according to a predetermined measuring method by placing 3 ml of the pigment dispersion in a measuring cell. As parameters to be input for immediate presentation, ink viscosity was used for viscosity, and pigment density was used for the density of dispersed particles.
- a more preferable volume average particle size is 20 nm or more and 200 nm or less, more preferably 30 nm or more and 180 nm or less, and most preferably 30 nm or more and 150 nm or less.
- the volume average particle diameter of the particles in the pigment dispersion is less than 20 nm, there are cases where the storage stability cannot be ensured, while when it exceeds 250 nm, the optical density may be lowered.
- the concentration of the pigment contained in the pigment dispersion of the present invention is preferably in the range of 1 to 35% by mass, more preferably in the range of 2 to 25% by mass. If the density is less than 1% by mass, sufficient image density may not be obtained when the pigment dispersion is used alone as the ink. If the concentration exceeds 35% by mass, the dispersion stability may decrease.
- the amount of the colorant added is preferably 1 to 5% by mass, more preferably 1.5 to 4% by mass, based on the ink composition.
- the ink composition according to the invention preferably contains at least one of a dispersant and a penetrant.
- the amount of carbon black added is 3.0% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, based on the black ink composition. is there.
- the black reproducibility is excellent.
- these pigments are preferably added to the ink as a pigment dispersion obtained by dispersing the pigment in an aqueous medium with a dispersant or a surfactant.
- a dispersant conventionally used for preparing a pigment dispersion, for example, a polymer dispersant can be used. More preferred is a vinyl polymer.
- the vinyl polymer used in the present invention contains a hydrophobic structural unit (a) represented by the following general formula (AI) and a hydrophilic structural unit (c).
- R 1 represents a hydrogen atom, a methyl group, or a halogen atom
- L 1 represents —COO—, —OCO—, —CONR 2 —, —O—, or substituted or unsubstituted phenylene
- R 2 represents a hydrogen atom or an alkyl group
- L 2 represents a single bond or a divalent linking group
- Ar 1 represents a monovalent group derived from an aromatic hydrocarbon ring.
- Hydrophobic structural unit (a) represented by formula (AI) depends on the dispersion stability of the pigment, ejection stability, From the viewpoint of detergency, it is preferably 10% by mass or more and less than 75% by mass, more preferably 20% by mass or more and less than 70% by mass, and more preferably 30% by mass or more and 60% by mass, based on the total mass of the vinyl polymer. It is particularly preferred that it is less than.
- the alkyl group represented by R 2 is preferably an alkyl group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, and a t-butyl group.
- substituent include, but are not limited to, a halogen atom, an alkyl group, an alkoxy group, a hydroxyl group, and a cyano group.
- L 2 is a divalent linking group, it is preferably a linking group having 1 to 30 carbon atoms, more preferably a linking group having 1 to 25 carbon atoms, and particularly preferably a linking group having 1 to 20 carbon atoms. It is.
- R 1 is a hydrogen atom or a methyl group
- L 1 is (main chain side) —COO—
- L 2 is at least one selected from an alkyleneoxy group and an alkylene group.
- the aromatic hydrocarbon ring in Ar 1 is not particularly limited, but is a benzene ring, a condensed aromatic hydrocarbon ring having 8 or more carbon atoms, a hetero ring in which an aromatic hydrocarbon ring is condensed, or a connection of two or more. Benzene ring.
- the condensed aromatic hydrocarbon ring having 8 or more carbon atoms is an aromatic hydrocarbon ring in which at least two benzene rings are condensed, and / or at least one aromatic hydrocarbon ring and the aromatic ring.
- the heterocyclic ring condensed with the aromatic hydrocarbon ring is a compound in which an aromatic compound containing no hetero atom (preferably a benzene ring) and a cyclic compound having a hetero atom are condensed at least.
- the cyclic compound having a hetero atom is preferably a 5-membered ring or a 6-membered ring.
- a hetero atom a nitrogen atom, an oxygen atom, or a sulfur atom is preferable.
- the cyclic compound having a hetero atom may have a plurality of hetero atoms, and in this case, the hetero atoms may be the same as or different from each other.
- Specific examples of the heterocyclic ring condensed with an aromatic hydrocarbon ring include phthalimide, acridone, carbazole, benzoxazole, and benzothiazole.
- the hydrophobic structural unit (a) represented by the general formula (AI) is preferably at least one selected from structural units derived from acrylate and (meth) acrylate. If it is at least one selected from structural units derived from acrylate and (meth) acrylate, an aromatic hydrocarbon ring can be bonded from the main chain via an ester bond, and interaction such as pigment and adsorptivity The aromatic hydrocarbon ring that can be expected to have a three-dimensional structure with a degree of freedom from the main chain.
- the hydrophobic structural unit (a) represented by the general formula (AI) includes a benzene ring, a condensed aromatic hydrocarbon ring having 8 or more carbon atoms, a heterocyclic ring condensed with an aromatic hydrocarbon ring, or two It preferably contains a monovalent group derived from one or more linked benzene rings. This is because by adopting the above aromatic hydrocarbon ring, interaction such as adsorptivity with the pigment can be exhibited.
- the hydrophobic structural units (a) represented by the general formula (AI) from the viewpoint of dispersion stability, selected from any of benzyl acrylate, benzyl methacrylate, phenoxyethyl acrylate, and phenoxyethyl methacrylate. It is preferable that the structural unit is derived from at least one selected from the group consisting of at least one selected from phenoxyethyl methacrylate and benzyl methacrylate. In the present invention, it is more preferable that the hydrophobic structural unit (a) contains at least 20% by mass of structural units derived from phenoxyethyl (meth) acrylate with respect to the total mass of the vinyl polymer.
- At least one selected from the structural unit derived from phenoxyethyl (meth) acrylate and the structural unit derived from benzyl (meth) acrylate as the hydrophobic structural unit (a) is 20 masses in total with respect to the total mass of the vinyl polymer. More preferably, the hydrophilic structural unit (c) contains at least one selected from structural units derived from acrylic acid and methacrylic acid in an amount of 30% by mass or less based on the total mass of the vinyl polymer. Among them, the hydrophobic structural unit (a) contains a total amount of structural units derived from phenoxyethyl (meth) acrylate with respect to the total mass of the vinyl polymer, and the hydrophilic structural unit (c) is acrylic acid. It is particularly preferable that at least one selected from structural units derived from methacrylic acid is contained in an amount of 15% by mass or less based on the total mass of the vinyl polymer.
- Hydrophobic structural unit (b) derived from alkyl ester of acrylic acid or methacrylic acid may contain a hydrophobic structural unit (b) derived from an alkyl ester of acrylic acid or methacrylic acid.
- the alkyl ester preferably has 1 to 18 carbon atoms, more preferably 1 to 8 carbon atoms, still more preferably 1 to 4 carbon atoms, and particularly preferably 1 to 2 carbon atoms.
- the content of the hydrophobic structural unit (b) is preferably 5% by mass to 75% by mass, more preferably 20% by mass to 60% by mass in the vinyl polymer.
- hydrophobic structural unit (b) examples include methyl (meth) acrylate, ethyl (meth) acrylate, (iso) propyl (meth) acrylate, (iso or tertiary) butyl (meth) acrylate, cyclohexyl ( Examples include (meth) acrylates such as (meth) acrylate, dodecyl (meth) acrylate, and stearyl (meth) acrylate. Of these, methyl (meth) acrylate, ethyl (meth) acrylate, and cyclohexyl (meth) acrylate are preferred.
- Hydrophilic structural unit (c) The hydrophilic structural unit (c) contained in the vinyl polymer in the present invention will be described. Examples of the hydrophilic structural unit (c) include carboxylic acid-containing acrylic acid and methacrylic acid. Moreover, the hydrophilic structural unit containing a nonionic hydrophilic group can be mentioned.
- hydrophilic structural unit (c) examples include (meth) acrylates, (meth) acrylamides and vinyl esters having a hydrophilic functional group.
- hydrophilic functional group examples include a hydroxyl group, an amino group, an amide group (with a nitrogen atom unsubstituted), and an alkylene oxide polymer such as polyethylene oxide and polypropylene oxide as described later.
- hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate, (meth) acrylamide, aminoethyl acrylate, aminopropyl acrylate, and (meth) acrylate containing an alkylene oxide polymer are particularly preferable.
- hydrophilic structural unit (c) examples include a hydrophilic structural unit having an alkylene oxide polymer structure.
- the alkylene of the alkylene oxide polymer preferably has 1 to 6 carbon atoms, more preferably 2 to 6 carbon atoms, and particularly preferably 2 to 4 carbon atoms from the viewpoint of hydrophilicity.
- the degree of polymerization of the alkylene oxide polymer is preferably 1 to 120, more preferably 1 to 60, and particularly preferably 1 to 30.
- hydrophilic structural unit (c) examples include hydrophilic structural units containing a hydroxyl group.
- the number of hydroxyl groups is not particularly limited, and is preferably 1 to 4, more preferably 1 to 3, and particularly preferably 1 to 2 from the viewpoint of hydrophilicity of the vinyl polymer and compatibility with the solvent and other monomers during polymerization. preferable.
- hydrophilic structural unit (c) examples include acrylic acid and methacrylic acid.
- the content of the hydrophilic structural unit (c) is preferably 4% by mass to 50% by mass, preferably 6% by mass to 25% by mass, and preferably 8% by mass to 15% by mass with respect to the total mass of the vinyl polymer. The following is more preferable.
- the vinyl polymer in the present invention is particularly preferably a polymer represented by the following general formula (AII) from the viewpoint of the effects of the present invention.
- a represents 10% by mass or more and less than 75% by mass with respect to the total mass of the vinyl polymer.
- B represents 5% by mass or more and less than 50% by mass with respect to the total mass of the vinyl polymer. (Represents 4% by mass or more and less than 50% by mass with respect to the total mass of the vinyl polymer.
- a is 20% by mass or more and less than 60% by mass with respect to the total mass of the vinyl polymer
- b is 5% by mass or more and less than 60% by mass with respect to the total mass of the vinyl polymer
- a is 40% by mass or more and less than 60% by mass with respect to the total mass of the vinyl polymer
- b is based on the total mass of the vinyl polymer. 20 mass% or more and less than 60 mass%, and the case where c represents 8 mass% or more and less than 15 mass% with respect to the vinyl polymer total mass is especially preferable.
- a + b + c 100.
- the combination of the vinyl polymer of the general formula (AII) and the azo pigment of any one of the formulas (1a) to (3a) is preferable because the effects of the present invention are further improved.
- the vinyl polymer in the present invention is a structural unit (d) having a structure different from the hydrophobic structural unit (a), the hydrophobic structural unit (b), and the hydrophilic structural unit (c) ( Hereinafter, it may be simply referred to as “structural unit (d)”.
- the content of the structural unit (d) is preferably 15% by mass to 80% by mass, preferably 25% by mass to 70% by mass, and preferably 40% by mass to 60% by mass with respect to the total mass of the vinyl polymer. More preferred.
- the monomer in the case where the structural unit (d) is a hydrophobic structural unit is not particularly limited as long as it has a functional group capable of forming a polymer and a hydrophobic functional group, and any known monomers Can also be used.
- the monomer capable of forming the hydrophobic structural unit vinyl monomers and ((meth) acrylamides, styrenes, vinyl esters, etc.) are preferable from the viewpoints of availability, handleability, and versatility.
- (meth) acrylamides examples include (meth) acrylamides such as N-cyclohexyl (meth) acrylamide, N- (2-methoxyethyl) (meth) acrylamide, N, N-diallyl (meth) acrylamide, and N-allyl (meth) acrylamide. ) Acrylamides.
- Styrenes include styrene, methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, isopropyl styrene, n-butyl styrene, tert-butyl styrene, methoxy styrene, butoxy styrene, acetoxy styrene, chlorostyrene, dichlorostyrene, bromostyrene, Examples thereof include chloromethyl styrene, methyl vinyl benzoate, ⁇ -methyl styrene, vinyl naphthalene and the like, and styrene and ⁇ -methyl styrene are preferable.
- vinyl esters examples include vinyl esters such as vinyl acetate, vinyl chloroacetate, vinyl propionate, vinyl butyrate, vinyl methoxyacetate, and vinyl benzoate. Of these, vinyl acetate is preferable. These can be used alone or in admixture of two or more.
- the vinyl polymer can be composed of only the hydrophobic structural unit (a) and the hydrophilic structural unit (c). More preferably, the hydrophobic structural unit (a) of the vinyl polymer is at least selected from a structural unit derived from phenoxyethyl (meth) acrylate and a structural unit derived from benzyl (meth) acrylate. One total is 20% by mass or more based on the total mass of the vinyl polymer, and the hydrophilic structural unit (c) is selected from structural units derived from acrylic acid and methacrylic acid. The content of 30% by mass or less is more preferable.
- the acid value of the vinyl polymer of the present invention is preferably from 30 mgKOH / g to 300 mgKOH / g, more preferably from 40 mgKOH / g to less than 150 mgKOH / g, from the viewpoint of pigment dispersibility and storage stability. It is particularly preferably 50 mgKOH / g or more and 100 mgKOH / g.
- the acid value here is defined by the mass (mg) of KOH required to completely neutralize 1 g of the vinyl polymer, and can be measured by the method described in JIS standards (JIS K0070, 1992).
- the vinyl polymer in the present invention may be a random copolymer in which each structural unit is irregularly introduced, or may be a block copolymer in which the structural units are regularly introduced. These structural units may be synthesized in any order of introduction, and the same constituent components may be used twice or more. However, a random copolymer is used in terms of versatility and manufacturability. preferable.
- the molecular weight range of the vinyl polymer used in the present invention is a mass average molecular weight (Mw), preferably 30,000 to 150,000, more preferably 30,000 to 100,000, and still more preferably 30,000 to 80,000. It is. By setting the molecular weight within the above range, the steric repulsion effect as a dispersing agent tends to be good, and it is preferable from the viewpoint of the tendency that adsorption to the pigment does not take time due to the steric effect.
- the molecular weight distribution (expressed by mass average molecular weight value / number average molecular weight value) of the vinyl polymer used in the present invention is preferably 1 to 6, and more preferably 1 to 4.
- the number average molecular weight and the mass average molecular weight are detected by a solvent THF and a differential refractometer using a GPC analyzer using columns of TSKgel GMHxL, TSKgel G4000HxL, and TSKgel G2000HxL (both trade names manufactured by Tosoh Corporation).
- the molecular weight is expressed using polystyrene as a standard substance.
- the vinyl polymer used in the present invention can be synthesized by various polymerization methods such as solution polymerization, precipitation polymerization, suspension polymerization, precipitation polymerization, bulk polymerization, and emulsion polymerization.
- the polymerization reaction can be performed by a known operation such as a batch system, a semi-continuous system, or a continuous system.
- the polymerization initiation method includes a method using a radical initiator, a method of irradiating light or radiation, and the like.
- polymerization methods and polymerization initiation methods are, for example, the revised version of Tsuruta Junji “Polymer Synthesis Method” (published by Nikkan Kogyo Shimbun, 1971), Takatsu Otsu, Masato Kinoshita, “Experimental Methods for Polymer Synthesis” It is described in pages 154 to 154 published in 1972.
- a solution polymerization method using a radical initiator is particularly preferable.
- Solvents used in the solution polymerization method include, for example, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, tetrahydrofuran, dioxane, N, N-dimethylformamide, N, N-dimethylacetamide, benzene, toluene, acetonitrile,
- a single organic organic solvent such as methylene chloride, chloroform, dichloroethane, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, or a mixture of two or more thereof may be used, or a mixed solvent with water may be used.
- the polymerization temperature needs to be set in relation to the molecular weight of the polymer to be produced, the type of initiator, and the like, and is usually about 0 ° C. to 100 ° C., but the polymerization is preferably performed in the range of 50 to 100 ° C.
- the reaction pressure can be appropriately selected, but it is usually preferably 1 to 100 kg / cm 2 , particularly preferably about 1 to 30 kg / cm 2 .
- the reaction time is about 5 to 30 hours.
- the obtained resin may be subjected to purification such as reprecipitation.
- the ratio of the vinyl polymer added in the present invention is preferably in the range of 10% to 100%, more preferably 30% to 60%, based on the weight of the pigment.
- Preferred examples of the dispersant include a cationic dispersant, an anionic dispersant, and a nonionic dispersant.
- Preferred examples of the surfactant include a cationic surfactant, an anionic surfactant, and a nonionic surfactant.
- dispersants and surfactants can be used alone or in admixture of two or more.
- styrene- (meth) acrylic acid water-soluble resin it is preferable to use a styrene- (meth) acrylic acid water-soluble resin as a dispersant.
- the composition of the ink composition may be appropriately determined in consideration of the recording method and the like.
- the ink composition basically includes the colorant, water, and a water-soluble organic solvent.
- the water-soluble organic solvent examples include high boiling point organic solvents.
- the high boiling point organic solvent prevents clogging of the head by preventing the ink composition from drying.
- Preferred examples of the high boiling point organic solvent include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, propylene glycol, butylene glycol, 1,2,6-hexanetriol, thioglycol, hexylene glycol, glycerin, triglyceride, Polyhydric alcohols such as methylolethane and 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 ether Alkyl ethers of any polyhydric alcohols,
- the ink composition may contain a low-boiling organic solvent as the water-soluble organic solvent.
- a low-boiling organic solvent include methanol, ethanol, n-propyl alcohol, iso-propyl alcohol, n-butanol, sec-butanol, tert-butanol, iso-butanol, n-pentanol and the like.
- a monohydric alcohol is particularly preferable.
- the low boiling point organic solvent has an effect of shortening the drying time of the ink.
- the ink composition may contain a penetrant.
- penetrants include various surfactants such as anionic surfactants, cationic surfactants and amphoteric surfactants, alcohols such as methanol, ethanol and iso-propyl alcohol, ethylene glycol monomethyl ether, diethylene glycol monoethyl ether And lower alkyl ethers of polyhydric alcohols such as diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monobutyl ether and dipropylene glycol monobutyl ether, and acetylene glycol.
- surfactants such as anionic surfactants, cationic surfactants and amphoteric surfactants
- alcohols such as methanol, ethanol and iso-propyl alcohol
- ethylene glycol monomethyl ether diethylene glycol monoethyl ether
- lower alkyl ethers of polyhydric alcohols such as diethylene glycol monobutyl ether, tri
- the penetrant is preferably at least one of a lower alkyl ether of a polyhydric alcohol and acetylene glycols, and particularly preferably diethylene glycol monobutyl ether or triethylene glycol monobutyl ether.
- the addition amount of the penetrant may be appropriately determined, but is preferably 1 to 20% by mass, more preferably 1 to 10% by mass.
- examples of the penetrant include acetylene glycols represented by the following formula (BI).
- R 1 , R 2 , R 3 and R 4 are each independently an alkyl group (preferably an alkyl group having 1 to 6 carbon atoms).
- acetylene glycols represented by the above formula can also be used, and specific examples thereof include Orphine Y, Surfinol 82, Surfinol 440, Surfinol 465, Surfinol 485 (all Manufacturing: Air Products and Chemicals. Inc.).
- Surfynol 465 is preferable. These may be used alone or in combination of two or more.
- the amount of these penetrants added is preferably about 0.1 to 5% by mass, more preferably about 0.5 to 2% by mass.
- the ink composition can be prepared by dissolving and / or dispersing the colorant compound of the present invention in a lipophilic medium or an aqueous medium.
- a lipophilic medium Preferably, an aqueous medium is used.
- other additives may be contained within a range that does not impair the effects of the present invention.
- additives include, for example, anti-drying agents (wetting agents), anti-fading agents, emulsion stabilizers, penetration enhancers, ultraviolet absorbers, preservatives, anti-fungal agents, pH adjusters, surface tension adjusters, Known additives such as foaming agents, viscosity modifiers, dispersants, dispersion stabilizers, rust preventives, chelating agents (the ones described in JP-A-2002-371214 can be applied). These various additives are directly added to the ink liquid in the case of water-soluble ink. When an oil-soluble colorant is used in the form of a dispersion, it is generally added to the dispersion after preparation of the colorant dispersion, but it may be added to the oil phase or aqueous phase during preparation.
- a mixture containing water as a main component and optionally adding a water-miscible organic solvent can be used.
- the water-miscible organic solvent include alcohol (eg, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, t-butanol, pentanol, hexanol, cyclohexanol, benzyl alcohol), polyvalent Alcohols (eg, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, butylene glycol, hexanediol, pentanediol, glycerin, hexanetriol, thiodiglycol), glycol derivatives (eg , Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene
- the yellow ink composition used in the present invention contains the azo pigment represented by the general formula (1), a tautomer thereof, a salt or a hydrate thereof.
- any yellow colorant can be used in combination.
- Reactive Yellow 2, 3, 13, 14, 15, 17, 18, 23, 24, 25, 26, 27, 29, 35, 37, 41, 42, C.I. I. Basic yellow 1, 2, 4, 11, 13, 14, 15, 19, 21, 23, 24, 25, 28, 29, 32, 36, 39, 40 etc. are mentioned.
- aryl or heteroaryl azo dyes having phenols, naphthols, anilines, heterocycles such as pyrazolone and pyridone as coupling components and open-chain active methylene compounds, for example, open-chain active methylene compounds as coupler components
- Azomethine dyes such as benzylidene dyes and monomethine oxonol dyes, for example, quinone dyes such as naphthoquinone dyes and anthraquinone dyes, and other dye types include quinophthalone dyes, Examples thereof include nitro / nitroso dyes, acridine dyes, and acridinone dyes.
- the yellow colorant may exhibit yellow colors only after a part of the chromophore is dissociated, and the counter cation in that case may be an alkali metal or an inorganic cation such as ammonium. In addition, it may be an organic cation such as pyridinium or quaternary ammonium salt, and may further be a polymer cation having them in a partial structure.
- the concentration of the yellow colorant in the yellow composition can be appropriately determined based on the color value of the colorant used.
- the azo pigment represented by the general formula (1) is preferably 0.2 to 10 parts by mass, and preferably 3 to 6 parts by mass, in 100 parts by mass of the ink for inkjet recording. More preferred.
- the colorant (pigment) concentration is preferably 0.2% by mass or more, it is possible to ensure sufficient color developability as an ink, and further by setting the colorant (pigment) concentration to 10% by mass or less, the ink used for the ink jet recording method.
- As a composition it becomes easy to ensure dischargeability from a nozzle, prevent nozzle clogging, and the like.
- the mass ratio of the azo pigment represented by the general formula (1) in the all yellow composition is not particularly limited, but is preferably 70% or more, particularly preferably 90% or more, and among them, 100% is most preferred.
- Preferred examples of the yellow dye used as the colorant for the yellow ink composition include compounds described in International Publication No. 05/075753 pamphlet and Japanese Patent Application Laid-Open No. 2007-63520.
- magenta ink composition used in the present invention is a C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, C.I. I. Including at least one selected from CI Pigment Red 209.
- the ink set of the present invention can contain a dark magenta ink composition and a light magenta ink composition as a magenta ink composition.
- a dark magenta ink composition and a light magenta ink composition as a magenta ink composition.
- both the dark magenta ink composition and the light magenta ink composition are included in the ink set, at least one of both is a C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, or C.I. I. Pigment Red 209 is preferably included as a colorant, and the light magenta ink composition is C.I. I. Pigment violet 19, C.I. I. Pigment red 122 or C.I. I.
- Pigment Red 202 as a colorant, and a dark magenta ink composition is C.I. I. Pigment violet 19, C.I. I. Pigment red 122 or C.I. I. More preferably, CI Pigment Red 202 is included as a colorant. Most preferably, both the light magenta ink composition and the dark magenta ink composition are C.I. I. Pigment Red 202 is included as a colorant.
- the concentration of the magenta colorant in the magenta ink composition can be determined as appropriate based on the color value of the colorant used.
- C.I. I. Pigment violet 19 In 100 parts by mass of ink jet recording ink, C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, or C.I. I.
- the total amount of CI pigment red 209 is preferably 0.2 to 10 parts by mass, and more preferably 3 to 6 parts by mass.
- the colorant (pigment) concentration By setting the colorant (pigment) concentration to 0.2% by mass or more, it is possible to ensure sufficient color developability as an ink, and further by setting the colorant (pigment) concentration to 10% by mass or less, the ink used for the ink jet recording method. As a composition, it becomes easy to ensure dischargeability from a nozzle, prevent nozzle clogging, and the like.
- C.I. I. Pigment violet 19 As a colorant, C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, or C.I. I.
- C.I. I. Pigment violet 19 In the case where a magenta ink composition is prepared by using Pigment Red 209 in combination with another magenta colorant, C.I. I. Pigment violet 19, C.I. I. Pigment red 122, C.I. I. Pigment red 202, or C.I. I.
- the ratio of the total mass of Pigment Red 209 and the mass of the magenta colorant used in combination is not particularly limited, but is preferably 50:50 to 100: 0, and more preferably 70:30 to 100: 0. Particularly preferred is 80:20 to 100: 0.
- C.I. I. Pigment violet 19 C.I. I. Pigment red 122, C.I. I. Pigment red 202, or C.I. I. Pigment Red 209 and other magenta colorants may be used in combination.
- Reactive violet 1 3, 4, 5, 6, 7, 8, 9, 16, 17, 22, 23, 24, 26, 27, 33, 34, C.I. I.
- Coupler components phenols, naphthols, anilines, heterocycles such as pyrazine, aryl- or heterylazo dyes having open-chain active methylene compounds, etc.
- open-chain types as coupler components Examples thereof include azomethine dyes and anthrapyridone dyes having active methylene compounds.
- the magenta ink composition contains ⁇ -type C.I. I. Pigment violet 19 and C.I. I. It is preferable that it contains at least a solid solution of CI Pigment Red 202. With such a suitable configuration, the above effects can be further improved.
- solid solution of ⁇ -type CI Pigment Violet 19 and CI Pigment Red 202 means a crystal in which ⁇ -type PV19 and PR202 are solid and are dissolved in each other.
- the amount ratio of ⁇ -type PV19 and PR202 in the solid solution can be adjusted as appropriate within the scope of the present invention, but the weight of ⁇ -type PV19 is preferably larger than the weight of PV202.
- FIG. 1 The result of the powder X-ray diffraction analysis of the suitable example of the said solid solution is shown in FIG.
- the sample was packed into a glass cell having a depth of 0.5 mm and measured using PaNalytical X'PertPro.
- the magenta ink composition may further contain other magenta pigments such as PV19 and PV32 in addition to the solid solution.
- magenta pigments include C.I. I. Pigment Red (PR) 5, 7, 12, 48 (Ca), 48 (Mn), 57 (Ca), 57: 1, 112, 122, 123, 168, 184, 202, 209; I. And CI Pigment Violet 19 (PV19).
- a preferred form of the ink set of the present embodiment is provided with a magenta ink composition containing at least the solid solution, and as long as the solid solution is contained, other magenta pigments such as PV19 and PV32 or other pigments are further included. You may go out.
- the amount ratio of ⁇ -type PV19 and PR202 in the solid solution can be appropriately adjusted within the scope of the present invention.
- the cyan ink composition used in the present invention has C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4 or C.I. I. At least one selected from CI Pigment Blue 15: 6.
- a dark cyan ink composition and a light cyan ink composition can be included in the ink set as the cyan ink composition.
- both the dark cyan ink composition and the light cyan ink composition are included in the ink set, at least one of both is a C.I. I. Pigment blue 15: 3 or C.I. I. Pigment Blue 15: 4 is preferably included as a colorant
- the light cyan ink composition is C.I. I. Pigment blue 15: 3 or C.I. I. Pigment Blue 15: 4 as a colorant
- a dark cyan ink composition is C.I. I. Pigment blue 15: 3 or C.I. I. More preferably, pigment blue 15: 4 is included as a colorant.
- both the light cyan ink composition and the dark cyan ink composition are C.I. I. Pigment Blue 15: 3 is included as a colorant.
- the concentration of the cyan colorant in the cyan ink composition can be determined as appropriate based on the color value of the pigment used.
- the content is preferably 0.2 to 10 parts by mass, more preferably 3 to 6 parts by mass, out of 100 parts by mass of the ink for inkjet recording.
- I. Pigment blue 15: 3 or C.I. I. Pigment Blue 15: 4 is preferably contained in an amount of 0.2 to 10 parts by mass, and more preferably 3 to 6 parts by mass.
- Other cyan colorants may be used in combination with Pigment Blue 15: 4.
- the total content of all colorants is preferably within the above range.
- cyan colorant examples include C.I. I. Direct Blue 1, 10, 15, 22, 25, 55, 67, 68, 71, 76, 77, 78, 80, 84, 86, 87, 90, 98, 106, 108, 109, 151, 156, 158, 159, 160, 168, 189, 192, 193, 194, 199, 200, 201, 202, 203, 207, 211, 213, 214, 218, 225, 229, 236, 237, 244, 248, 249, 251, 252, 264, 270, 280, 288, 289, 291, C.I. I.
- aryl or hetaryl azo dyes having phenols, naphthols, anilines, etc. as coupler components for example, azomethine dyes, cyanine dyes, oxonols having heterocycles such as phenols, naphthols, pyrrolotriazole, etc. as coupler components
- coupler components examples thereof include polymethine dyes such as dyes and merocyanine dyes, carbonium dyes such as diphenylmethane dyes, triphenylmethane dyes and xanthene dyes, phthalocyanine dyes, anthraquinone dyes, and indigo / thioindigo dyes.
- the ink for inkjet recording of the present invention can be used not only for forming a single color image but also for forming a full color image.
- a magenta ink composition, a cyan ink composition, and a yellow ink composition can be used to form a full-color image, and a black ink composition may be further used to adjust the color tone.
- the ink set of the present invention contains a black ink composition, and the black ink composition preferably contains carbon black as a colorant.
- the colorant of the black ink composition is C.I. I. Pigment Black 7 and C.I. I. Pigment blue 15: 1, 15: 2, 15: 3, 15: 4, 16, C.I. I. It is preferably composed of one or more selected from the group consisting of Bat Blue 4 and 60.
- the addition amount of the colorant in the black ink composition is preferably 0.2 to 10 parts by mass, and more preferably 1 to 3 parts by mass.
- the colorant (pigment) concentration By setting the colorant (pigment) concentration to 0.2% by mass or more, it is possible to ensure sufficient color developability as an ink, and further by setting the colorant (pigment) concentration to 10% by mass or less, the ink used for the ink jet recording method. As a composition, it becomes easy to ensure dischargeability from a nozzle, prevent nozzle clogging, and the like.
- the ink set of the present invention can be configured to include a black ink composition as desired, and an image having good contrast can be formed on a recording medium by including the black ink composition in the ink set of the present invention. Can do.
- the colorant used in the black ink composition is not limited to the colorant having a specific structure, but the black ink composition has the light resistance and ozone resistance of the ink composition of other colors. It is preferable that the difference between the light resistance and the ozone resistance is small.
- Applicable black dyes include disazo, trisazo, and tetraazo dyes as well as carbon black dispersions.
- ⁇ Inkjet recording method> printing is performed by attaching the ink composition of the ink set of the present invention to a recording medium.
- the recording method is preferably an ink jet recording method in which printing is performed by discharging droplets of the ink composition and attaching the droplets to a recording medium.
- a known image receiving material that is, plain paper, resin-coated paper, such as JP-A-8-169172, JP-A-8-27693, JP-A-2-276670, JP-A-7-276789, JP-A-9-323475, JP-A-62-238783, JP-A-10-153789, JP-A-10-217473, JP-A-10-235995 10-337947, 10-217597, 10-337947, etc.
- inkjet paper film, electrophotographic co-paper, fabric, glass, metal, ceramics, etc.
- paragraph numbers 0093 to 0105 in JP-A No. 2003-306623 can be applied as an ink jet recording method preferable for the present invention.
- a polymer latex compound When forming an image, a polymer latex compound may be used in combination for the purpose of giving glossiness or water resistance or improving weather resistance.
- the timing of applying the latex compound to the image receiving material may be before, after, or simultaneously with the application of the colorant, and therefore the addition location may be in the image receiving paper. It may be in ink or may be used as a liquid material of polymer latex alone.
- JP-A No. 2002-166638 Japanese Patent Application No. 2000-363090
- JP-A No. 2002-121440 Japanese Patent Application No. 2000-315231
- JP-A No. 2002-154201 Japanese Patent Application No. 2000-354380
- JP-A No. 2002-144696 The methods described in Japanese Patent Application No. 2000-343944
- Japanese Patent Application Laid-Open No. 2002-080759 Japanese Patent Application Laid-Open No. 2002-080759
- a first step a step of applying a liquid composition for improving printability to a recording medium.
- Second step a step of applying an ink composition to the recording medium to which the liquid composition has been applied.
- Other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a drying removal step and a heat fixing step.
- the drying removal step is not particularly limited except that the ink solvent in the ink composition applied to the recording medium is removed by drying, and can be appropriately selected according to the purpose.
- the heat fixing step is not particularly limited except that the latex particles contained in the ink used in the ink jet recording method are melt-fixed, and can be appropriately selected depending on the purpose.
- a first step a step of applying a liquid composition for improving printability to an intermediate transfer member.
- Second step a step of applying an ink composition to the intermediate transfer body to which the liquid composition has been applied.
- Third step a step of transferring an ink image formed on the intermediate transfer member to a recording medium.
- Other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a drying removal step and a heat fixing step.
- An ink jet recording apparatus includes a recording head that uses ink for ink jet recording and discharges ink (if necessary, treatment liquid) onto the surface of the recording medium, and forms an image by discharging the ink from the recording head onto the surface of the recording medium.
- the ink jet recording apparatus supplies an ink tank for ink jet recording (hereinafter sometimes referred to as “ink tank”) that can supply ink to the recording head and is detachable from the main body of the ink jet recording apparatus. You may have. In this case, ink is stored in the ink tank for ink jet recording.
- a normal ink jet recording apparatus having a printing method capable of using ink for ink jet recording can be used.
- a heater for controlling the drying of the ink as necessary is provided. It may be mounted, or may be equipped with an intermediate transfer mechanism, and a mechanism for discharging (printing) ink and processing liquid onto the intermediate and then transferring it to a recording medium such as paper.
- an ink tank for ink jet recording is detachable from an ink jet recording apparatus equipped with a recording head, and can be used as long as it has a configuration capable of supplying ink to the recording head while attached to the ink jet recording apparatus.
- a known ink tank can be used.
- the ink jet recording method preferably employs a thermal ink jet recording method or a piezo ink jet recording method from the viewpoint of the effect of improving bleeding and intercolor bleeding.
- the thermal ink jet recording method the ink is heated at the time of ejection and has a low viscosity, but the viscosity rapidly increases because the temperature of the ink is lowered on the recording medium. For this reason, there is an effect of improving bleeding and intercolor bleeding.
- the piezo ink jet method it is possible to discharge a high-viscosity liquid, and the high-viscosity liquid can suppress spreading in the paper surface direction on the recording medium. There is an improvement effect on intercolor bleeding.
- the ink jet recording cartridge contains ink jet recording ink.
- the replenishment (supply) of ink to the recording head is preferably performed from an ink tank (including a treatment liquid tank if necessary) filled with ink liquid.
- the ink tank is preferably of a cartridge type that can be attached to and detached from the apparatus main body, and ink can be easily replenished by exchanging the cartridge type ink tank.
- the recorded matter is obtained by using an ink for ink jet recording.
- the recorded matter of the present invention is a recorded matter formed by forming an image using the above-described ink set of the present invention.
- a recorded matter formed with an ink set comprising a yellow ink composition containing the azo pigment of the above formula (2) or (3) can realize an image having excellent color reproducibility and image fastness. This is preferred from the viewpoint of excellent light fastness.
- the X-ray diffraction of the azo pigment used in the yellow ink composition was measured using CuK ⁇ rays with a powder X-ray diffraction measurement device RINT2500 (manufactured by Rigaku Corporation) in accordance with Japanese Industrial Standard JISK0131 (general rules for X-ray diffraction analysis). This was performed under the following conditions.
- Measuring instrument used Automatic X-ray diffractometer RINT2500 manufactured by Rigaku X-ray tube: Cu Tube voltage: 55KV Tube current: 280 mA Scanning method: 2 ⁇ / ⁇ scan Scanning speed: 6 deg. / Min. Sampling interval: 0.100 deg. Start angle (2 ⁇ ): 5 deg. Stop angle (2 ⁇ ): 55 deg. Divergence slit: 2 deg. Scattering slit: 2 deg. Resiping slit: 0.6mm Using vertical goniometer
- the azo pigment represented by the general formula (1) is a pigment described in Pig. Synthesis Example 1 described below. It is possible to synthesize according to the synthesis method of -1.
- the obtained crystals were suspended in 400 mL of water without drying, and 8N aqueous potassium hydroxide solution was added to adjust the pH to 5.7. After stirring at room temperature for 20 minutes, the obtained crystals were separated by filtration, thoroughly washed with water, and then washed with 80 mL of acetone. The obtained crystal was dried at room temperature for 12 hours.
- the obtained crystals were suspended in 580 mL of acetone and then stirred for 30 minutes under reflux. Thereafter, the mixture was cooled to room temperature over 10 minutes, and the obtained crystals were filtered off and dried at room temperature for 5 hours to obtain 17.1 g of a pigment (Pig.-1). Yield 88.5%.
- the obtained azo pigment (Pig.-1) was visually observed with a transmission microscope (manufactured by JEOL Ltd .: JEM-1010 electron microscope), the length of the primary particles in the major axis direction was about It was 15 ⁇ m. The X-ray diffraction of the pigment (Pig.-1) was measured under the above conditions.
- the obtained crystals were suspended in a mixed solution of 180 mL of dimethylacetamide and 180 mL of water, and then the internal temperature was raised to 85 ° C. and stirred at the same temperature for 2 hours. Thereafter, the obtained crystals were filtered off with heating, suspended in 300 mL of methanol, and stirred at room temperature for 30 minutes. The obtained crystals were separated by filtration and dried at room temperature for 5 hours to obtain 19.5 g of an azo pigment (Pig.-18). Yield 90.3% The obtained azo pigment (Pig.-18) was visually observed with a transmission microscope (manufactured by JEOL Ltd .: JEM-1010 electron microscope). The length of the primary particles in the major axis direction was about It was 150 nm.
- Table 1 below shows a combination of the same synthesis methods as the above-described exemplary compounds (Pig.-1) and (Pig.-18) shown in Synthesis Examples 1 and 2 or the production method of the azo pigment of the present invention described above.
- the azo pigments of the present invention shown were synthesized.
- CuK ⁇ characteristic X-ray diffraction patterns of the obtained azo pigments are shown in FIGS.
- Example 1 (Preparation of aqueous dispersion of pigment-containing polymer vinyl polymer particles) A 5 mol / L aqueous sodium hydroxide solution was added to 10 parts by mass of the obtained 50% polymer vinyl polymer solution to neutralize it. In addition, the alkali amount which completely neutralizes methacrylic acid or acrylic acid of a high molecular vinyl polymer was added. 10 parts by mass of the pigment exemplified compound (Pig.-1) of the present invention was added, and kneaded with a roll mill for 2 to 8 hours as necessary. The kneaded product was dispersed in 100 parts by mass of ion-exchanged water.
- the organic dispersion was completely removed from the obtained dispersion under reduced pressure at 55 ° C., and further concentrated by removing water to obtain an aqueous dispersion of pigment-containing polymer vinyl polymer particles having a solid content concentration of 15% by mass. Obtained.
- the weight average molecular weight (Mw) of the obtained copolymer was 64000 (calculated in terms of polystyrene by gel permeation chromatography (GPC), the columns used were TSKgel SuperHZM-H, TSKgel SuperHZ4000, TSKgel SuperHZ200 (manufactured by Tosoh Corporation)), The acid value was 38.9 (mgKOH / g).
- 668.3 g of the polymerization solution was weighed, and 388.3 g of isopropanol, 1 mol / L. 145.7 ml of NaOH aqueous solution was added, and the temperature inside the reaction vessel was raised to 80 ° C.
- Aqueous dispersion of pigment-containing polymer vinyl polymer particles 25 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Ion-exchanged water 28 parts by weight The above is mixed to obtain a yellow ink composition 1 It was. When the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 8.5.
- magenta ink and cyan ink Seiko Epson's IC-42-magenta ink and IC-42-cyan ink were used.
- Example 2 A yellow ink composition 2 was obtained in the same manner as in Example 1 except that the azo pigment composition (Pig.-2) was used instead of the azo pigment composition (Pig.-1) used in Example 1. .
- Example 3 A yellow ink composition 3 was obtained in the same manner as in Example 1 except that the azo pigment composition (Pig.-18) was used instead of the azo pigment composition (Pig.-1) used in Example 1. .
- Example 4 A yellow ink composition 4 was obtained in the same manner as in Example 1 except that the azo pigment composition (Pig.-24) was used instead of the azo pigment composition (Pig.-1) used in Example 1. .
- Example 5 A yellow ink composition 5 was obtained in the same manner as in Example 1 except that the azo pigment composition (Pig.-44) was used instead of the azo pigment composition (Pig.-1) used in Example 1. .
- Example 6 A yellow ink composition 6 was obtained in the same manner as in Example 1 except that the azo pigment composition (Pig.-45) was used instead of the azo pigment composition (Pig.-1) used in Example 1. .
- Example 7 An image pattern was printed in the same manner as in Example 1 except that magenta ink 1 prepared with the following composition was used in place of the IC42 magenta ink used in Example 1, and the hue, printing characteristics, and image fastness were evaluated. went.
- Example 8 An image pattern was printed in the same manner as in Example 1 except that the magenta ink composition 2 prepared with the following composition was used instead of the IC42 magenta ink used in Example 1, and the hue, printing characteristics, and image fastness were improved. Evaluation was performed.
- Example 9 An image pattern was printed in the same manner as in Example 1 except that the cyan ink composition 1 prepared with the following composition was used instead of the IC42 cyan ink used in Example 1, and the hue, printing characteristics, and image fastness were improved. Evaluation was performed.
- Example 10 An image pattern was printed in the same manner as in Example 1 except that the cyan ink composition 2 prepared with the following composition was used instead of the IC 42 cyan ink used in Example 1, and the hue, printing characteristics, and image fastness were improved. Evaluation was performed.
- Comparative Example 1 instead of the azo pigment composition (Pig.-1) used in Example 1, C.I. I. A comparative yellow ink composition 1 was obtained in the same manner as in Example 1 except that CI Pigment Yellow 74 (Iralite YELLOW GO manufactured by Ciba Specialty) was used.
- CI Pigment Yellow 74 Iralite YELLOW GO manufactured by Ciba Specialty
- Comparative Example 2 instead of the azo pigment composition (Pig.-1) used in Example 1, C.I. I. A comparative yellow ink composition 2 was obtained in the same manner as in Example 1 except that CI Pigment Yellow 155 (INKJET YELLOW 4G VP2532 manufactured by Clariant) was used.
- Comparative Example 3 instead of the azo pigment composition (Pig.-1) used in Example 1, C.I. I. A comparative yellow ink composition 3 was obtained in the same manner as in Example 1 except that CI Pigment Yellow 128 (CROMOPHTAL YELLOW 8GN manufactured by Ciba Specialty) was used.
- CI Pigment Yellow 128 CROMOPHTAL YELLOW 8GN manufactured by Ciba Specialty
- the yellow pigment ink liquids of Examples 1 to 10 and Comparative Examples 1, 2 and 3 were loaded into a yellow ink liquid cartridge of an ink jet printer PX-V630 manufactured by Seiko Epson Corporation, and the image receiving sheet was Seiko Epson Corporation.
- Company photo paper Krispia ⁇ High gloss> Color setting: No color correction, Print quality: Print a monochrome single-color image pattern whose density changed stepwise with a photo, and evaluate the hue, printing characteristics and image fastness It was.
- Each color single-color image pattern and green and red image patterns are printed, which are composed of yellow, magenta, cyan, and black, and the OD value of each color changes in a staircase pattern.
- Hue printing characteristics, image fastness (light resistance / ozone gas resistance) and image quality were evaluated.
- Evaluation A ROD 21 days after the start of the test is 85% or more at any concentration.
- Evaluation B The ROD after 21 days from the start of the test has a concentration at any one point of less than 85%.
- Evaluation C The ROD after 21 days from the start of the test is such that the concentration at any two points is less than 85%.
- Evaluation D ROD 21 days after the start of the test is less than 85% at all concentrations.
- Example 11 The three-color ink set used in Example 1 is the yellow ink composition 1 used in Example 1, the magenta ink composition 1 used in Example 7, the cyan ink composition 1 used in Example 9, and the following.
- a gray image pattern was printed in the same manner as in Example 1 except that the color ink set was changed to a four-color ink set using the black ink composition prepared in the above composition, and yellow, magenta,
- the gray image light fastness and ozone gas fastness prepared by combining the three color inks of cyan were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 12 An image pattern was printed in the same manner as in Example 11 except that the magenta ink composition 1 used in Example 11 was changed to the magenta ink composition 2 used in Example 8, and hue, printing characteristics, and image fastness were obtained. Was evaluated. The obtained results are shown in Table 2 as “light fastness / ozone gas fastness”.
- Example 13 An image pattern was printed in the same manner as in Example 11 except that the cyan ink composition 1 used in Example 11 was changed to the cyan ink composition 2 used in Example 10, and hue, printing characteristics, and image fastness were obtained. Was evaluated. The obtained results are shown in Table 2 as “light fastness / ozone gas fastness”.
- Example 14 The same operation as in Example 11 except that the magenta ink composition 1 used in Example 11 was changed to the magenta ink composition 2 used in Example 12, and the cyan ink 1 was changed to the cyan ink 2 used in Example 13. Thus, the image pattern was printed, and the hue, printing characteristics and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 15 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. An image pattern was printed by the same operation as in Example 11 except that it was changed to 2, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 2 as “light fastness / ozone gas fastness”.
- Example 16 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. An image pattern was printed by the same operation as in Example 11 except for changing to 12, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 17 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. An image pattern was printed by the same operation as in Example 11 except for changing to 18, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 18 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. Except for changing to 24, an image pattern was printed by the same operation as in Example 11, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 19 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. An image pattern was printed by the same operation as in Example 11 except for changing to 44, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 20 The yellow pigment Pig. Pig. In the yellow ink composition 1 used in Example 11 was used. 1 to Pig. An image pattern was printed by the same operation as in Example 11 except for changing to 45, and the hue, printing characteristics, and image fastness were evaluated. The obtained results are shown in Table 3 as “light fastness / ozone gas fastness”.
- Example 11 In place of the yellow ink composition 1 used in Example 11, C.I. I. A comparative yellow ink composition 11 was obtained in the same manner as in Example 11 except that CI Pigment Yellow 74 (Iralite YELLOW GO manufactured by Ciba Specialty) was used.
- Evaluation A ROD 35 days after the start of the test has a residual concentration of 85% or more.
- Evaluation B The ROD after 35 days from the start of the test has a residual concentration of 70% or more and less than 85%.
- Evaluation C The ROD after 35 days from the start of the test has a residual concentration of 50 to less than 70%.
- Evaluation D ROD after 35 days from the start of the test is less than 50% in residual concentration.
- Example 21 A yellow ink composition 21 was prepared by performing the same operation except that the composition of the yellow ink composition 1 using the aqueous yellow pigment dispersion used in Example 1 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Aqueous dispersion of pigment-containing polymer vinyl polymer particles 30 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Deionized water 23 parts by weight The above is mixed to obtain a yellow ink composition 21 It was. When the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK, the pH was 8.8.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 22 A yellow ink composition 22 was prepared by carrying out the same operation except that the composition of the yellow ink composition 1 using the aqueous yellow pigment dispersion used in Example 1 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 23 A yellow ink composition 23 was prepared by performing the same operation except that the composition of the yellow ink composition 1 using the aqueous yellow pigment dispersion used in Example 1 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 24 A yellow ink composition 24 was prepared by carrying out the same operation except that the composition of the yellow ink composition 1 using the aqueous yellow pigment dispersion used in Example 1 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Water dispersion of the above pigment-containing polymer vinyl polymer particles 45 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Ion-exchanged water 8 parts by weight The above is mixed to obtain a yellow ink composition 24 It was.
- the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 9.0.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 25 A yellow ink composition 25 was prepared by carrying out the same operation except that the composition of the yellow ink composition 1 using the aqueous yellow pigment dispersion used in Example 1 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Aqueous dispersion of pigment-containing polymer vinyl polymer particles 50 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by mass
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by mass Ion-exchanged water 3 parts by mass The above is mixed to obtain a yellow ink composition 25 It was. When the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 9.1.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 26 Yellow ink (Pig.18) -containing polymer vinyl polymer particles used in Example 3 Aqueous dispersion of yellow ink composition 3 The same procedure was followed, except that the composition of yellow ink composition 3 was changed to the following content. A composition 26 was prepared, and subsequently an image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Aqueous dispersion of pigment-containing polymer vinyl polymer particles 30 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Deionized water 23 parts by weight The above is mixed to obtain a yellow ink composition 26 It was. When the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 8.7.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 27 A yellow ink composition 27 was prepared by carrying out the same operation except that the composition of the yellow ink composition 3 using the aqueous yellow pigment dispersion used in Example 3 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 28 A yellow ink composition 28 was prepared by carrying out the same operation except that the composition of the yellow ink composition 3 using the aqueous yellow pigment dispersion used in Example 3 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Water dispersion of pigment-containing polymer vinyl polymer particles 40 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Deionized water 13 parts by weight The above is mixed to obtain a yellow ink composition 28 It was.
- the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK, the pH was 8.8.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 29 A yellow ink composition 29 was prepared by carrying out the same operation except that the composition of the yellow ink composition 3 using the aqueous yellow pigment dispersion used in Example 3 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Water dispersion of the above pigment-containing polymer vinyl polymer particles 45 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfin E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by weight
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by weight Ion-exchanged water 8 parts by weight The above is mixed to obtain a yellow ink composition 29 It was.
- the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 8.9.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 30 A yellow ink composition 30 was prepared by carrying out the same operation except that the composition of the yellow ink composition 3 using the aqueous yellow pigment dispersion used in Example 3 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Aqueous dispersion of pigment-containing polymer vinyl polymer particles 50 parts by mass Glycerin 5 parts by mass Diethylene glycol 5 parts by mass Triethylene glycol monobutyl ether 5 parts by mass Polyoxypropylene glyceryl ether 10 parts by mass Dipropylene glycol 5 parts by mass Triethanolamine 1 part by mass Part Olfine E1010 (manufactured by Nissin Chemical Industry Co., Ltd.) 1 part by mass
- Aqueous dispersion of self-dispersing polymer fine particles (B-01) 15 parts by mass Ion-exchanged water 3 parts by mass The above is mixed to obtain a yellow ink composition 30 It was. When the pH of the ink composition was measured with a pH meter-WM-50EG manufactured by Toa DKK Co., Ltd., the pH was 9.0.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- Example 31 A yellow ink composition 31 was prepared by carrying out the same operation except that the composition of the yellow ink composition 3 using the aqueous yellow pigment dispersion used in Example 3 was changed to the following contents. The image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- magenta ink and cyan ink For magenta ink and cyan ink, ink set using IC-42-magenta ink and IC-42-cyan ink manufactured by Seiko Epson Corporation was used.
- a comparative yellow ink composition 21 was prepared in the same manner as in Example 1 except that the azo pigment composition (C.I.PY74) was used instead of the azo pigment composition (Pig.-1) used in Example 1. Then, an image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- the azo pigment composition C.I.PY74
- the azo pigment composition Pig.-1
- Example 22 The yellow pigment (Pig. 1) used in Example 25 is C.I. I.
- a comparative yellow ink composition 22 was prepared in the same manner as in Example 25 except that it was changed to PY74, and an image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- Example 23 The yellow pigment (Pig. 1) used in Example 31 is C.I. I.
- a comparative yellow ink composition 23 was prepared in the same manner as in Example 31 except that it was changed to PY74, an image pattern was printed, and the hue, printing characteristics, and image fastness were evaluated.
- FIG. 20 shows an ink set of ⁇ yellow pigment ink 1, magenta pigment ink 2, cyan pigment ink 1, black pigment ink ⁇ of Example 1 and ⁇ yellow pigment ink, magenta pigment ink 2, cyan pigment ink 1 of Comparative Example 2 ⁇ .
- FIG. 6 is a diagram comparing color reproduction areas for patch patterns of an ink set of “black pigment ink”.
- Example 33 shows an ink set of ⁇ Yellow pigment ink, magenta pigment ink 2, cyan pigment ink 1, black pigment ink ⁇ of Example 3 and ⁇ Yellow pigment ink, magenta pigment ink 1, cyan pigment ink 1, It is the figure which compared the color reproduction area about the patch pattern of the ink set of black pigment ink ⁇ .
- Example 34 shows an ink set of ⁇ Yellow pigment ink of Example 3, magenta pigment ink 2, cyan pigment ink 1, black pigment ink ⁇ and ⁇ Yellow pigment ink, magenta pigment ink 2, cyan pigment ink 1 of Comparative Example 1, It is the figure which compared the color reproduction area about the patch pattern of the ink set of black pigment ink ⁇ .
- Example 35 shows an ink set of ⁇ Yellow pigment ink, magenta pigment ink 1, cyan pigment ink 1, black pigment ink ⁇ of Example 3 and ⁇ Yellow pigment ink, magenta pigment ink 1, cyan pigment ink 1 of Comparative Example 1, It is the figure which compared the color reproduction area about the patch pattern of the ink set of black pigment ink ⁇ .
- the ink set of the present invention can obtain a printed matter having a wide color reproduction range of yellow to red and green as compared with the comparative example. It was confirmed that it was possible to provide an excellent ink set capable of satisfying both image fastness and faithful color reproduction of an inkjet recorded matter.
- an ink set excellent in a wide range of color reproducibility, ozone gas fastness and light resistance is provided.
- an ink set having excellent color reproducibility and light fastness in a mixed color region such as a single yellow color and red and green colors is provided.
- the recorded image printed by the ink set of the present invention is also a mixed color part, especially yellow ink and cyan. It is possible to form a good recorded matter with improved hue, printing characteristics (colorability), and image fastness at a high level at the same time in the green and red portions where ink, yellow ink and magenta ink are printed.
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Abstract
Description
それぞれのインクは、インク組成物に一般的に要求される性能を満たさなければならない。例えば、記録媒体上で鮮明な画像が得られること、長期保存による画像の劣化がないことが求められる。特に、インク組成物によって形成された画像に要求される性能の一つとして耐光性がある。
良好な耐光性を付与するためには、着色剤として顔料をインク組成物に用いるのが一般的である。しかし、顔料の選択によっては満足のいく耐光性を付与することができない場合がある。また、顔料は染料と比較して着色力の点に劣り、しかも記録媒体に印刷して得られた画像が鮮やかさに欠けることがある。
一方、最近、インクジェット記録プリンタが広く普及している。このインクジェット記録方法は、インク組成物の小液滴を飛翔させ、紙等の記録媒体に付着させて印刷を行う印刷方法である。この方法は、比較的安価な装置で高解像度、高品位の画像を高速で印刷可能という特徴を有する。特にカラーインクジェット記録装置は、画像品質が向上した結果、写真の出力機としても利用され、更にデジタル印刷機、プロッター、CAD出力デバイス等としても利用されるに至っている。インクジェット記録プリンタによって印刷された画像は、様々な利用の形態が考えられる。特に写真仕様の印刷物などはディスプレイとして長時間蛍光灯又は屋外等の直射日光に暴露される場所におかれていることが考えられる。よって、インクジェット記録方法によって得られた画像においては耐光性は極めて重要な要求性能である。
カラー画像形成において、イエロー領域の色を再現するには、イエロー顔料を含むイエローインク組成物が用いられる。イエロー顔料の具体例としては、C.I.ピグメントイエロー1,2,3,12,13,14,16,17,73,74,75,83,93,95,97,98,109,110,114,128,129,138,139,150,151,154,155,180,185,213等が挙げられる。
しかしながら、良好な色再現性を有する2種以上のイエロー顔料を含むイエローインク組成物では、1種類の顔料を含むインクよりは広範囲な色再現性を得ることができるが、イエロー領域における暗部色再現性は十分ではない。また、色相角が離れた顔料種の混合では2次色の彩度が低くなる傾向が顕著であり、たとえばC.I.ピグメントイエロー110が赤味を帯びているため、インクセットに用いると緑色が低彩度になる欠点を有していた。
〔1〕
イエローインク組成物と、
マゼンタインク組成物及びシアンインク組成物の少なくとも1つと、を含んでなるインクセットであって、
イエローインク組成物の着色剤が下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩又は水和物を含んでなるものであり、
マゼンタインク組成物が着色剤としてC.I.ピグメントバイオレット19、C.I.ピグメントレッド122、C.I.ピグメントレッド202、C.I.ピグメントレッド209から選ばれる少なくとも1種を含み、
シアンインク組成物が着色剤としてC.I.ピグメントブルー15:1、C.I.ピグメントブルー15:2、C.I.ピグメントブルー15:3、C.I.ピグメントブルー15:4、C.I.ピグメントブルー15:6から選ばれる少なくとも1種を含むインクセット。
前記インクセットが更にブラックインク組成物を含み、該ブラックインク組成物が着色剤としてカーボンブラックを含むことを特徴とする〔1〕に記載のインクセット。
〔3〕
前記一般式(1)中のW1、W2が、それぞれ独立に総炭素数3以下のアルコキシ基、アミノ基又は総炭素数6以下のアルキルアミノ基であることを特徴とする、〔1〕又は〔2〕に記載のインクセット。
〔4〕
前記一般式(1)中のG1、G2が、それぞれ独立に総炭素数3以下のアルキル基であることを特徴とする〔1〕~〔3〕のいずれか一項に記載のインクセット。
〔5〕
前記一般式(1)中のZが、6員含窒素ヘテロ環であることを特徴とする〔1〕~〔4〕のいずれか一項に記載のインクセット。
〔6〕
前記一般式(1)で表されるアゾ顔料が、下記一般式(2)で表されるアゾ顔料であることを特徴とする〔1〕~〔5〕のいずれか一項に記載のインクセット。
前記一般式(2)で表されるアゾ顔料が、下式(3)で表されるアゾ顔料であることを特徴とする〔1〕~〔6〕のいずれか一項に記載のインクセット。
前記式(3)で表されるアゾ顔料が、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)が7.2°及び25.9°に特徴的なX線回折ピークを有するアゾ顔料又は互変異性体であることを特徴とする〔7〕に記載のインクセット。
〔9〕
前記一般式(2)で表されるアゾ顔料が、下式(4)で表されるアゾ顔料であることを特徴とする〔1〕~〔6〕のいずれか一項に記載のインクセット。
前記式(4)で表されるアゾ顔料が、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)が7.6°、25.6°及び27.7°に特徴的なX線回折ピークを有するアゾ顔料又は互変異性体であることを特徴とする〔9〕に記載のインクセット。
〔11〕
前記イエローインク組成物中の着色剤の添加量が3~6質量%である〔1〕~〔10〕のいずれか一項に記載のインクセット。
〔12〕
前記マゼンタインク組成物中の着色剤の添加量が3~6質量%である〔1〕~〔10〕のいずれか一項に記載のインクセット。
〔13〕
前記シアンインク組成物中の着色剤の添加量が3~6質量%である〔1〕~〔10〕のいずれか一項に記載のインクセット。
〔14〕
前記ブラックインク組成物中の着色剤の添加量が1~3質量%である〔2〕~〔10〕のいずれか一項に記載のインクセット。
〔15〕
前記インク組成物が分散剤及び浸透剤の少なくとも1種を更に含む、〔1〕~〔14〕のいずれか一項に記載のインクセット。
〔16〕
前記分散剤がビニルポリマーである〔15〕に記載のインクセット。
〔17〕
前記浸透剤が多価アルコールの低級アルキルエーテル及びアセチレングリコール類の少なくとも1つである〔15〕に記載のインクセット。
〔18〕
前記マゼンタインク組成物が、γ型C.I.ピグメントバイオレット19と、C.I.ピグメントレッド202と、の固溶体を少なくとも含む、〔1〕~〔17〕の何れか1項に記載のインクセット。
〔19〕
前記シアンインク組成物の着色剤が、C.I.ピグメントブルー15:3、15:4、15:16からなる群から選ばれる1種又は2種以上の顔料である〔1〕~〔18〕のいずれか一項に記載のインクセット。
〔20〕
〔1〕~〔19〕のいずれか一項に記載のインクセットのインク組成物を記録媒体に付着させて印刷を行う記録方法。
〔21〕
前記記録方法がインク組成物の液滴を吐出し、該液滴を記録媒体に付着させて印刷を行うインクジェット記録方法である〔20〕に記載の記録方法。
〔22〕
〔20〕又は〔21〕に記載の記録方法によって印刷された記録物。
本発明によるインクセットは、イエローインク組成物と、
マゼンタインク組成物及びシアンインク組成物の少なくとも1つと、を含むインクセットであって、
イエローインク組成物の着色剤が下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩又は水和物を含み、
マゼンタインク組成物が着色剤としてC.I.ピグメントバイオレット19、C.I.ピグメントレッド122、C.I.ピグメントレッド202、C.I.ピグメントレッド209から選ばれる少なくとも1種を含み、
シアンインク組成物が着色剤としてC.I.ピグメントブルー15:1、C.I.ピグメントブルー15:2、C.I.ピグメントブルー15:3、C.I.ピグメントブルー15:4、C.I.ピグメントブルー15:6から選ばれる少なくとも1種を含むものである。
これら顔料を含むインク組成物を組み合わせて画像を形成することにより、色再現性に優れた画像が実現できる。また、上記顔料は単独でも高い、オゾンガス堅牢性及び耐光性を有するため、得られた画像は堅牢性に優れる。
本発明のインクセットに関してイエローインク組成物は、下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩又は水和物を含む。
Zを6員含窒素ヘテロ環にすることでビス型アゾ色素がアミノ基、含窒素6員ヘテロ環とで分子内水素結合を形成しやすくなり、色素分子配列が立体的に制御(一定の距離・角度、平面性で配列)しやすくなる。その結果、色素分子が安定な分子内・分子間相互作用(水素結合やπ-πスタッキング)を有する構造が形成されやすく、より安定な分子配列の構造(例えば3次元ネットワーク)を構成しやすくなることで、良好な色相、着色力、高い画像堅牢性(例えば耐光性、耐オゾンガス性、耐熱性、耐湿性)の点で好ましい。
W1、W2が総炭素数5以下のアルコキシ基、アミノ基、総炭素数5以下のアルキルアミノ基の場合、色素分子が分子内及び分子間で相互作用(水素結合やπ-πスタッキング)を強固に形成しやすくなり、より安定な分子配列の構造(例えば3次元ネットワーク)を構成しやすくなることで、良好な色相、高い堅牢性(例えば耐光性、耐オゾンガス性、耐熱性、耐湿性)の点で好ましく、更にメトキシ基、エトキシ基、アミノ基が色相、光堅牢性、耐溶剤性の点から好ましく、その中でもメトキシ基が、色相と光堅牢性向上の点から最も好ましい。
R11、R12を総炭素数の小さい(1~4)直鎖アルキル基又は分岐アルキル基にすることで、色素分子配列が立体的に制御(一定の距離・角度で配列)しやすくなる。その結果、色素分子が安定な分子内・分子間相互作用(水素結合やπ-πスタッキング)を有する構造が形成されやすく、より安定な分子配列の構造(例えば3次元ネットワーク)を構成しやすくなることで、色相、着色力、高い画像堅牢性(例えば耐光性、耐オゾンガス性、耐熱性、耐湿性)の点で好ましい。
アルキルチオ基としては、好ましくは、炭素数1から30の置換若しくは無置換のアルキルチオ基、例えば、メチルチオ基、エチルチオ基、n-ヘキサデシルチオ基等が挙げられる。
式(3)で表されるアゾ顔料を用いることにより良好な色相と高い画像堅牢性を同時に付与することができる。
また、本発明において、一般式(1)~(4)で表されるアゾ顔料は、分子内水素結合又は分子内交叉水素結合を形成する置換基を有することが好ましい。少なくとも1個以上の分子内交叉水素結合を形成する置換基を有することが好ましく、少なくとも3個以上の分子内水素結合を形成する置換基を有することがより好ましく、少なくとも3個以上の分子内水素結合を形成する置換基を有し、かつ、それらの水素結合の少なくとも2個が分子内交叉水素結合を形成する置換基を有する場合が特に好ましい。
アゾ顔料における結晶多形の混合比は、単結晶X線結晶構造解析、粉末X線回折(XRD)、結晶の顕微鏡写真(TEM)、IR(KBr法)等の固体の物理化学的測定値から確認できる。
上記一般式(B)で表される化合物は、国際公開第06/082669号や特開2006-57076号公報に記載の方法、及び、それに準じた方法で製造することができる。
上式(A)で表されるヘテロ環アミン(ジアゾ成分)のジアゾニウム塩への調製及びジアゾニウム塩と上式(B)で表される化合物(カップリング成分)とのカップリング反応は、慣用法によって実施できる。
カップリング反応する工程は、酸性反応媒質中~塩基性反応媒質中で実施することができるが、本発明のアゾ顔料は酸性~中性反応媒質中で実施することが好ましく、特に酸性反応媒質中で実施することがジアゾニウム塩の分解を抑制し効率良くアゾ顔料に誘導することができるため好ましい。
本発明は上記製造方法で製造されたアゾ顔料組成物にも関する。
本発明の製造方法においては、後処理を行う工程を含むことが好ましい。この後処理工程の方法としては、例えば、ソルベントソルトミリング、ソルトミリング、ドライミリング、ソルベントミリング、アシッドペースティング等の磨砕処理、溶媒加熱処理などによる顔料粒子制御工程、樹脂、界面活性剤及び分散剤等による表面処理工程が挙げられる。
本発明の顔料分散物は、上記一般式(1)で表される本発明のアゾ顔料、その互異性体、それらの塩又は水和物を少なくとも1種を含むことを特徴とし、更に好ましくは、上記一般式(2)又は式(3)で表される本発明のアゾ顔料を用いることを特徴とする。これにより、色彩的特性、耐久性及び分散安定性に優れた顔料分散物とすることができる。
本発明に用いるビニルポリマーは、下記一般式(AI)で表される疎水性構造単位(a)と、親水性構造単位(c)とを含む。
一般式(AI)で表される疎水性構造単位(a)(以下単に「疎水性構造単位(a)」と称する場合がある。)の含有量は、顔料の分散安定性、吐出安定性、洗浄性の観点から、前記ビニルポリマーの全質量のうち10質量%以上75質量%未満であることが好ましく、20質量%以上70質量%未満であることがより好ましく、30質量%以上60質量%未満であることが特に好ましい。
ここで、前記置換基としては、ハロゲン原子、アルキル基、アルコキシ基、水酸基等、シアノ基等が挙げられるが、特に限定されない。
L2が2価の連結基である場合、好ましくは炭素数1~30の連結基であり、より好ましくは炭素数1~25の連結基であり、特に好ましくは炭素数1~20の連結基である。
本発明においては、前記疎水性構造単位(a)がフェノキシエチル(メタ)アクリレートに由来の構造単位を総量でビニルポリマー全質量に対して20質量%以上含むことがより好ましい。
前記疎水性構造単位(a)がフェノキシエチル(メタ)アクリレートに由来の構造単位及びベンジル(メタ)アクリレートに由来の構造単位より選択される少なくとも一つを総量でビニルポリマー全質量に対して20質量%以上含み、前記親水性構造単位(c)がアクリル酸及びメタクリル酸に由来の構造単位より選択される少なくとも一つをビニルポリマー全質量に対して30質量%以下含むことが更に好ましい。
その中でも、前記疎水性構造単位(a)がフェノキシエチル(メタ)アクリレートに由来の構造単位を総量でビニルポリマー全質量に対して20質量%以上含み、前記親水性構造単位(c)がアクリル酸及びメタクリル酸に由来の構造単位より選択される少なくとも一つをビニルポリマー全質量に対して15質量%以下含むことが特に好ましい。
ビニルポリマーはアクリル酸又はメタクリル酸の、アルキルエステルに由来する疎水性構造単位(b)を含有してもよい。
アルキルエステルの炭素数は炭素数1~18が好ましく、1~8がより好ましく、炭素数1~4が更に好ましく、炭素数1~2が特に好ましい。
疎水性構造単位(b)の含有量はビニルポリマー中に好ましくは5質量%以上75質量%以下、更に好ましくは、20質量%以上60質量%以下である。
疎水性構造単位(b)の具体例としては、メチル(メタ)アクリレート、エチル(メタ)アクリレート、(イソ)プロピル(メタ)アクリレート、(イソ又はターシャリー)ブチル(メタ)アクリレート、シクロへキシル(メタ)アクリレート、ドデシル(メタ)アクリレート、ステアリル(メタ)アクリレート等の(メタ)アクリレート類が挙げられる。
中でもメチル(メタ)アクリレート、エチル(メタ)アクリレート、シクロへキシル(メタ)アクリレートが好ましい。
本発明におけるビニルポリマーに含まれる親水性構造単位(c)について説明する。
親水性構造単位(c)の例として、カルボン酸を有するアクリル酸、メタクリル酸を挙げることができる。また、非イオン性の親水性基を含有する親水性構造単位を挙げることができる。
親水性の官能基としては、水酸基、アミノ基、(窒素原子が無置換の)アミド基及び、後述するようなポリエチレンオキシド、ポリプロピレンオキシド等のアルキレンオキシド重合体が挙げられる。
これらのうち、ヒドロキシエチル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレート、(メタ)アクリルアミド、アミノエチルアクリレート、アミノプロピルアクリレート、アルキレンオキシド重合体を含有する(メタ)アクリレートが特に好ましい。
前記アルキレンオキシド重合体のアルキレンとしては、親水性の観点から炭素数1~6が好ましく、炭素数2~6がより好ましく、炭素数2~4が特に好ましい。
また、前記アルキレンオキシド重合体の重合度としては、1~120が好ましく、1~60がより好ましく、1~30が特に好ましい。
また、この一般式(AII)の形態のビニルポリマーと、前記式(1a)~(3a)のいずれかのアゾ顔料との組み合わせによれば、本発明の効果が一層向上し好ましい。
本発明におけるビニルポリマーは、前述の通り、前記疎水性構造単位(a)、前記疎水性構造単位(b)、及び前記親水性構造単位(c)とは異なる構造を有する構造単位(d)(以下、単に「構造単位(d)」という。)を含有することもできる。
前記構造単位(d)の含有量は、ビニルポリマー全質量に対して、15質量%以上80質量%以下が好ましく、25質量%以上70質量%以下が好ましく、40質量%以上60質量%以下がより好ましい。
前記疎水性の構造単位を形成しうるモノマーとしては、入手性、取り扱い性、汎用性の観点から、ビニルモノマー類、((メタ)アクリルアミド類、スチレン類、ビニルエステル類等)が好ましい。
これらは、それぞれ単独で又は2種以上を混合して用いることができる。
インクジェット記録用水性インクとしてより好ましくは、前記ビニルポリマーの前記疎水性構造単位(a)がフェノキシエチル(メタ)アクリレートに由来の構造単位及びベンジル(メタ)アクリレートに由来の構造単位より選択される少なくとも一つを総量でビニルポリマー全質量に対して20質量%以上含み、前記親水性構造単位(c)がアクリル酸及びメタクリル酸に由来の構造単位より選択される少なくとも一つをビニルポリマー全質量に対して30質量%以下含むものがより好ましい。
なお、ここでいう酸価とは、ビニルポリマーの1gを完全に中和するのに要するKOHの質量(mg)で定義され、JIS規格(JISK0070、1992)記載の方法により測定することができる。
前記分子量を上記範囲とすることにより、分散剤としての立体反発効果が良好な傾向となり、また立体効果により顔料への吸着に時間がかからなくなる傾向の観点から好ましい。
また、本発明で用いるビニルポリマーの分子量分布(質量平均分子量値/数平均分子量値で表される)は、1~6であることが好ましく、1~4であることがより好ましい。
前記分子量分布を上記範囲とすることは、インクの分散安定性、吐出安定性の観点から好ましい。ここで数平均分子量及び、質量平均分子量は、TSKgel GMHxL、TSKgel G4000HxL、TSKgel G2000HxL(何れも東ソー(株)製の商品名)のカラムを使用したGPC分析装置により、溶媒THF、示差屈折計により検出し、標準物質としてポリスチレンを用い換算して表した分子量である。
重合の開始方法はラジカル開始剤を用いる方法、光又は放射線を照射する方法等がある。これらの重合方法、重合の開始方法は、例えば鶴田禎二「高分子合成方法」改定版(日刊工業新聞社刊、1971)や大津隆行、木下雅悦共著「高分子合成の実験法」化学同人、昭和47年刊、124~154頁に記載されている。
上記重合方法のうち、特にラジカル開始剤を用いた溶液重合法が好ましい。溶液重合法で用いられる溶剤は、例えば酢酸エチル、酢酸ブチル、アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン、テトラヒドロフラン、ジオキサン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、ベンゼン、トルエン、アセトニトリル、塩化メチレン、クロロホルム、ジクロロエタン、メタノール、エタノール、1-プロパノール、2-プロパノール、1-ブタノールのような種々の有機溶剤の単独あるいは2種以上の混合物でも良いし、水との混合溶媒としても良い。
重合温度は生成するポリマーの分子量、開始剤の種類などと関連して設定する必要があり、通常、0℃~100℃程度であるが、50~100℃の範囲で重合を行うことが好ましい。
反応圧力は、適宜選定可能であるが、通常は、1~100kg/cm2、特に、1~30kg/cm2程度が好ましい。反応時間は、5~30時間程度である。得られた樹脂は再沈殿などの精製を行っても良い。
高沸点有機溶媒は、インク組成物の乾燥を防ぐことによりヘッドの目詰まりを防止する。
高沸点有機溶媒の好ましい例としては、エチレングリコール、ジエチレングリコール、トリエチレングリコール、ポリエチレングリコール、ポリプロピレングリコール、プロピレングリコール、ブチレングリコール、1,2,6-ヘキサントリオール、チオグリコール、ヘキシレングリコール、グリセリン、トリメチロールエタン、トリメチロールプロパンなどの多価アルコール類;エチレングリコールモノエチルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチエレングリコールモノメチルエーテル、トリエチレングリコールモノエチルエーテル、トリエチレングリコールモノブチルエーテルなどの多価アルコールのアルキルエーテル類、尿素、2-ピロリドン、N-メチル-2-ピロリドン、1,3-ジメチル-2-イミダゾリジノン、トリエタノールアミンなどがあげられる。
高沸点有機溶媒の添加量は特に限定されないが、好ましくは0.1~30質量%程度であり、より好ましくは0.5~20質量%程度である。
低沸点有機溶剤の好ましい例としては、メタノール、エタノール、n-プロピルアルコール、iso-プロピルアルコール、n-ブタノール、sec-ブタノール、tert-ブタノール、iso-ブタノール、n-ペンタノールなどがあげられる。特に一価アルコールが好ましい。
低沸点有機溶剤は、インクの乾燥時間を短くする効果がある。
浸透剤としては、アニオン性界面活性剤、カチオン性界面活性剤、両性界面活性剤等の各種界面活性剤、メタノール、エタノール、iso-プロピルアルコール等のアルコール類、エチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチレングリコールモノブチルエーテル、プロピレングリコールモノブチルエーテル、ジプロピレングリコールモノブチルエーテル等の多価アルコールの低級アルキルエーテル、アセチレングリコールなどがあげられる。浸透剤が多価アルコールの低級アルキルエーテル及びアセチレングリコール類の少なくとも1つであることが好ましく、特に、ジエチレングリコールモノブチルエーテル又はトリエチレングリコールモノブチルエーテルであることが好ましい。
上記浸透剤の添加量は適宜決定されてよいが、1~20質量%が好ましく、より好ましくは1~10質量%である。
インク組成物は、親油性媒体や水性媒体中に本発明の着色剤化合物を溶解及び/又は分散させることによって作製することができる。好ましくは、水性媒体を用いる場合である。必要に応じてその他の添加剤を、本発明の効果を害しない範囲内において含有させうる。その他の添加剤としては、例えば、乾燥防止剤(湿潤剤)、褪色防止剤、乳化安定剤、浸透促進剤、紫外線吸収剤、防腐剤、防黴剤、pH調整剤、表面張力調整剤、消泡剤、粘度調整剤、分散剤、分散安定剤、防錆剤、キレート剤等の公知の添加剤(特開2002-371214号公報に記載のものが適用できる)が挙げられる。これらの各種添加剤は、水溶性インクの場合にはインク液に直接添加する。油溶性着色剤を分散物の形で用いる場合には、着色剤分散物の調製後分散物に添加するのが一般的であるが、調製時に油相又は水相に添加してもよい。
本発明に用いるイエローインク組成物は、前記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩又は水和物を含む。
更に、カップリング成分としてフェノール類、ナフトール類、アニリン類、ピラゾロンやピリドン等のようなヘテロ環類、開鎖型活性メチレン化合物類などを有するアリール若しくはヘテリルアゾ色素、例えば、カプラー成分として開鎖型活性メチレン化合物類などを有するアゾメチン色素、例えば、ベンジリデン色素やモノメチンオキソノール色素等のようなメチン色素、例えば、ナフトキノン色素、アントラキノン色素等のキノン系色素などがあり、これ以外の色素種としてはキノフタロン色素、ニトロ・ニトロソ色素、アクリジン色素、アクリジノン色素等を挙げることができる。前記のイエロー着色剤は、クロモフォアの一部が解離して初めてイエローの各色を呈するものであってもよく、その場合のカウンターカチオンはアルカリ金属や、アンモニウムのような無機のカチオンであってもよいし、ピリジニウム、4級アンモニウム塩のような有機のカチオンであってもよく、更にはそれらを部分構造に有するポリマーカチオンであってもよい。
イエローインク組成物の着色剤として用いられるイエロー色素として好ましくは、国際公開第05/075573号パンフレット及び特開2007-63520号公報に記載の化合物が挙げられる。
本発明に用いられるマゼンタインク組成物は着色剤としてC.I.ピグメントバイオレット19、C.I.ピグメントレッド122、C.I.ピグメントレッド202、C.I.ピグメントレッド209から選ばれる少なくとも1種を含む。
C.I.アシッドレッド35、42、52、57、62、80、82、111、114、118、119、127、128、131、143、151、154、158、249、254、257、261、263、266、289、299、301、305、336、337、361、396、397、
C.I.アシッドバイオレット5、34、43、47、48、90、103、126、
C.I.リアクティブレッド3、13、17、19、21、22、23、24、29、35、37、40、41、43、45、49、55、
C.I.リアクティブバイオレット1、3、4、5、6、7、8、9、16、17、22、23、24、26、27、33、34、C.I.ベーシックレッド12、13、14、15、18、22、23、24、25、27、29、35、36、38、39、45、46、
C.I.ベーシックバイオレット1、2、3、7、10、15、16、20、21、25、27、28、35、37、39、40、48等が挙げられる。
更に、カップリング成分(以降カプラー成分と呼ぶ)として、フェノール類、ナフトール類、アニリン類、ピラジンのようなヘテロ環類、開鎖型活性メチレン化合物類などを有するアリール若しくはヘテリルアゾ色素、カプラー成分として開鎖型活性メチレン化合物類などを有するアゾメチン色素、アントラピリドン色素などを挙げることができる。
前記マゼンタインク組成物は、γ型C.I.ピグメントバイオレット19と、C.I.ピグメントレッド202と、の固溶体を少なくとも含むものであることが好ましい。このような好適な構成とすることにより、上記の効果をより向上させることができる。
、PaNalytical X’PertProを用いて、深さ0.5mmのガラスセルに試料を詰めて測定した。
本発明に用いられるシアンインク組成物は着色剤としてC.I.ピグメントブルー15:1、C.I.ピグメントブルー15:2、C.I.ピグメントブルー15:3、C.I.ピグメントブルー15:4又はC.I.ピグメントブルー15:6から選ばれる少なくとも1種を含む。
更に、カプラー成分としてフェノール類、ナフトール類、アニリン類などを有するアリール若しくはヘテリルアゾ色素、例えば、カプラー成分としてフェノール類、ナフトール類、ピロロトリアゾールのようなヘテロ環類などを有するアゾメチン色素、シアニン色素、オキソノール色素、メロシアニン色素などのようなポリメチン色素、ジフェニルメタン色素、トリフェニルメタン色素、キサンテン色素などのようなカルボニウム色素、フタロシアニン色素、アントラキノン色素、インジゴ・チオインジゴ色素などを挙げることができる。
本発明のインクセットはブラックインク組成物を含み、該ブラックインク組成物は着色剤としてカーボンブラックを含むことが好ましい。ブラックインク組成物の着色剤は、C.I.ピグメントブラック7と、必要に応じてC.I.ピグメントブルー15:1、15:2、15:3、15:4、16、C.I.バットブルー4、60からなる群から選ばれる1種又は2種以上と、からなることが好ましい。このような混合顔料をブラックインク組成物の着色剤に使用することにより、低Duty部での色相の赤みを抑制できるという効果がある。 ブラックインク組成物中の着色剤の添加量は、0.2~10質量部であることが好ましく、1~3質量部であることがより好ましい。着色剤(顔料)濃度を0.2質量%以上とすることにより、インクとして充分な発色性を確保でき、更に着色剤(顔料)濃度を10質量%以下にすることによりインクジェット記録方法に用いるインク組成物として、ノズルからの吐出性を確保することやノズル目詰まりを防止すること等が容易となる。
本発明の記録方法は、本発明のインクセットのインク組成物を記録媒体に付着させて印刷を行う。記録方法はインク組成物の液滴を吐出し、該液滴を記録媒体に付着させて印刷を行うインクジェット記録方法であることが好ましい。本発明の好ましいインクジェット記録方法として、インクジェット記録用インクにエネルギーを供与して、公知の受像材料、即ち普通紙、樹脂コート紙、例えば特開平8-169172号公報、同8-27693号公報、同2-276670号公報、同7-276789号公報、同9-323475号公報、特開昭62-238783号公報、特開平10-153989号公報、同10-217473号公報、同10-235995号公報、同10-337947号公報、同10-217597号公報、同10-337947号公報等に記載されているインクジェット専用紙、フィルム、電子写真共用紙、布帛、ガラス、金属、陶磁器等に画像を形成する。なお、本発明に好ましいインクジェット記録方法として特開2003-306623号公報の段落番号0093~0105の記載が適用できる。
インクジェット記録装置は、インクジェット記録用インクを用い、インク(必要により処理液)を記録媒体表面に吐出する記録ヘッドを備え、記録媒体表面に前記インクを記録ヘッドから吐出することにより、画像を形成する装置である。なお、インクジェット記録装置は、記録ヘッドに、インクを供給することができ、かつ、インクジェット記録装置本体に対して脱着可能なインクジェット記録用インクタンク(以下、「インクタンク」と称す場合がある)を備えていてもよい。この場合、このインクジェット記録用インクタンクには、インクが収納される。
また、インクジェット記録用インクタンクは、記録ヘッドを備えたインクジェット記録装置に対して脱着可能であり、インクジェット記録装置に装着した状態で、記録ヘッドにインクを供給できる構成を有するものであれば、従来公知のインクタンクが利用できる。
記録物はインクジェット記録用インクを用いることで得られる。
本発明の記録物は、前述した本発明のインクセットを用いて画像を形成されてなる記録物である。特に前記式(2)又は(3)のアゾ顔料を含むイエローインク組成物からなるインクセットを用いて画像を形成されてなる記録物は、色再現性に優れた画像が実現でき、画像堅牢性(特に光堅牢性)に優れる点から好適である。
X線管球 : Cu
管電圧 : 55KV
管電流 : 280mA
スキャン方法 : 2θ/θスキャン
スキャン速度 : 6deg./min.
サンプリング間隔 :0.100deg.
スタート角度(2θ) : 5deg.
ストップ角度(2θ) : 55deg.
ダイバージェンススリット : 2deg.
スキャッタリングスリット : 2deg.
レジーピングスリット : 0.6mm
縦型ゴニオメータ使用
(アゾ顔料の合成)アゾ顔料(Pig.-1)の合成スキームを下記に示す。
シアノ酢酸メチル29.7g(0.3モル)にオルトギ酸トリメチル42.4g(0.4モル)、無水酢酸20.4g(0.2モル)、p-トルエンスルホン酸0.5gを加えて110℃(外温)に加熱し、反応系から生じる低沸点成分を留去しながら20時間攪拌した。この反応液を減圧濃縮した後、シリカゲルカラム精製を行い前記中間体(a)を14.1g(黄色粉末、収率30%)で得た。得られた中間体(a)のNMR測定結果は以下の通りである。1H-NMR(300MHz、CDCl3)7.96(s,1H),4.15(s,3H),3.81(s,3H)
メチルヒドラジン7.4mL(141ミリモル)にイソプロパノール150mLを加えて15℃(内温)に冷却し、この混合液に中間体(a)7.0g(49.6ミリモル)を徐々に添加した後、50℃に加熱して1時間40分攪拌した。この反応液を減圧濃縮した後、シリカゲルカラム精製を行い前記中間体(b)を10.5g(白色粉末、収率50%)で得た。得られた中間体(b)のNMR測定結果は以下の通りである。1H-NMR(300MHz、CDCl3)7.60(s,1H),4.95(brs,2H),3.80(s,3H),3.60(s,3H)
ヒドラジン1水和物387mL(7.98モル)にメタノール298mLを加えて10℃(内温)に冷却し、この混合液に4,6-ジクロロピリミジン149g(1.00モル)を徐々に添加(内温20℃以下)した後、氷浴をはずし、室温まで昇温し、同温度にて30分攪拌した。その後更に加熱して内温60℃まで昇温し、同温度にて5時間攪拌した。反応終了後、水750mLを加えた後、氷冷して内温が8℃になるまで冷却し、析出した結晶をろ取、水でかけ洗いし、イソプロパノールでかけ洗いした。室温にて36時間乾燥を行い前記中間体(c’)を119g(白色粉末、収率84.5%)で得た。得られた中間体(c’)のNMR測定結果は以下の通りである。1H-NMR(300MHz、d-DMSO)7.80(s,1H),7.52(s,2H),5.98(s,1H),4.13(s,4H)
中間体(c’)50g(357ミリモル)に、水128mLを加えて室温で攪拌した。この懸濁液にピバロイルアセトニトリル98.2g(785ミリモル)を加え、同温度にて12M塩酸水をpH3になるように滴加した後、内温が50℃になるまで加熱し、同温度にて6時間攪拌した。反応終了後、8Nの水酸化カリウム水溶液を加えて中和し、pH6.4にした。氷冷し内温が10℃になるまで冷却し、析出した結晶をろ取、水でかけ洗いした。得られた結晶を減圧下60℃にて乾燥し、得られた粗精製物にトルエン30mLを加え、60℃に加熱して溶解させた。得られた溶液を室温にて12時間静置し、析出した結晶をろ取、冷却したトルエンでかけ洗いし、減圧下60℃にて乾燥し、前記中間体(d’)を87.7g(白色粉末、収率69.3%)で得た。得られた中間体(d’)のNMR測定結果は以下の通りである。1H-NMR(300MHz、d-DMSO)8.74(s,1H),7.99(s,1H),6.87(s,4H),5.35(s,2H),1.24(s,18H)
得られたアゾ顔料(Pig.-1)を透過型顕微鏡(日本電子(株)製:JEM-1010電子顕微鏡)で目視にて観察したところ、1次粒子の長軸方向の長さは、約15μmであった。
顔料(Pig.-1)のX線回折の測定を上記の条件により行ったところ、ブラッグ角(2θ±0.2°)が7.6°、及び25.6°に特徴的なX線回折ピークを示した。CuKα特性X線回折図を図1に示す。
(アゾ顔料の合成)アゾ顔料(Pig.-18)の合成スキームを下記に示す。
シアノ酢酸メチル29.7g(0.3モル)にオルトギ酸トリメチル42.4g(0.4モル)、無水酢酸20.4g(0.2モル)、p-トルエンスルホン酸0.5gを加えて110℃(外温)に加熱し、反応系から生じる低沸点成分を留去しながら20時間攪拌した。この反応液を減圧濃縮した後、シリカゲルカラム精製を行い前記中間体(a)を14.1g(黄色粉末、収率30%)で得た。得られた中間体(a)のNMR測定結果は以下の通りである。1H-NMR(300MHz、CDCl3)7.96(s,1H),4.15(s,3H),3.81(s,3H)
メチルヒドラジン7.4mL(141ミリモル)にイソプロパノール150mLを加えて15℃(内温)に冷却し、この混合液に中間体(a)7.0g(49.6ミリモル)を徐々に添加した後、50℃に加熱して1時間40分攪拌した。この反応液を減圧濃縮した後、シリカゲルカラム精製を行い前記中間体(b)を10.5g(白色粉末、収率50%)で得た。得られた中間体(b)のNMR測定結果は以下の通りである。1H-NMR(300MHz、CDCl3)7.60(s,1H),4.95(brs,2H),3.80(s,3H),3.60(s,3H)
メタノール1.1Lに水136mLを加えて、炭酸水素ナトリウム182g(2.17モル)を添加し、室温にて攪拌した。同温度にて塩化シアヌル200g(1.08モル)を分割添加した。添加終了後、内温を30℃まで昇温した。同温度にて30分間攪拌した後、水500mLを加え、析出した固体を濾別し、水500mL、メタノール300mLでかけ洗い後、乾燥を行い、前記中間体(c)を168g(白色粉末、収率86.2%)で得た。得られた中間体(c)のNMR測定結果は以下の通りである。1H-NMR(300MHz、CDCl3)4.14(s,3H)
ヒドラジン1水和物363mL(7.46モル)に水673mLを加えて10℃(内温)に冷却し、この混合液に中間体(c)168g(934ミリモル)を徐々に添加(内温20℃以下)した後、氷浴をはずし、室温まで昇温し、同温度にて30分攪拌した。反応液から析出した結晶をろ取、水700mL、アセトニトリル1Lでかけ洗い後、乾燥を行い前記中間体(d)の疎精製物(白色粉末)を得た。
中間体(d)の疎精製物に、エチレングリコール480mLを加えて室温で攪拌した。この懸濁液にピバロイルアセトニトリル257g(2.06モル)を加え、内温が50℃になるまで加熱した。同温度にて12M塩酸水をpH3になるように滴下した後、内温が80℃になるまで加熱して3時間攪拌した。反応終了後、氷冷し内温が8℃になるまで冷却し、析出した結晶をろ取、水でかけ洗い後、シリカゲルカラム精製を行い、前記中間体(e)を105g(白色粉末、2工程収率29.2%)で得た。得られた中間体(e)のNMR測定結果は以下の通りである。1H-NMR(300MHz、d-DMSO)7.00(s,4H),5.35(s,2H),4.05(s,3H),5.35(s,2H),1.22(s,18H)
酢酸125mLと硫酸24mLの混合液を氷冷し、内温を3℃まで冷却した。同温度にてニトロシル硫酸26.4gを添加し、続いて、同温度にて中間体(b)11.6gを分割添加して溶解させた。同温度にて1時間攪拌した後、同温度にて尿素1.2gを分割添加し、同温度にて15分間攪拌し、ジアゾニウム塩溶液を得た。別に、中間体(e)11.6gをメタノール405mLに室温にて完溶させ、氷冷して内温を-3℃に冷却した。同温にて、上述のジアゾニウム塩溶液を内温が3℃以下になるように分割添加し、添加終了後、2時間攪拌した。氷浴をはずし、室温にて10分間攪拌した後、析出した結晶を濾別し、メタノール150mLでかけ洗いし、更に水100mLでかけ洗いした。得られた結晶を乾燥せずに水750mLに懸濁させ、8規定の水酸化カリウム水溶液を添加して、pHを5.7にした。室温にて20分間攪拌した後、得られた結晶を濾別し、水で十分にかけ洗いしたのち、メタノール80mLでかけ洗いした。得られた結晶を室温にて、12時間乾燥させた。
得られたアゾ顔料(Pig.-18)を透過型顕微鏡(日本電子(株)製:JEM-1010電子顕微鏡)で目視にて観察したところ、1次粒子の長軸方向の長さは、約150nmであった。
アゾ顔料(Pig.-18)のX線回折の測定を上記の条件により行ったところ、ブラッグ角(2θ±0.2°)が7.2°及び25.9°に特徴的なX線回折ピークを示した。
CuKα特性X線回折図を図2に示す。
上記合成例1及び2に示す上記例示化合物(Pig.-1)、(Pig.-18)と同様の合成法又は上記記載の本発明のアゾ顔料の製造方法を組み合わせることにより、下記表1に示す本発明のアゾ顔料を合成した。得られたアゾ顔料のCuKα特性X線回折図を図3~19に示す。
(ビニルポリマー(P-1)の合成)
下記モノマー組成の成分を全量が100質量部になるように混合し、更に重合開始剤として2,2’-アゾビス(2,4-ジメチルバレロニトリル)1質量部添加し、窒素ガス置換を十分に行い、合成混合液を得た。
メチルメタクリレート 39質量部
メタクリル酸 11質量部
2-メルカプトエタノール 0.1質量部
(顔料含有高分子ビニルポリマー粒子の水分散物の調製)
得られた50%高分子ビニルポリマー溶液10質量部に5mol/L水酸化ナトリウム水溶液を加えて中和した。なお、高分子ビニルポリマーのメタクリル酸あるいはアクリル酸を完全中和するアルカリ量を添加した。本発明の顔料例示化合物(Pig.-1)10質量部を加え、ロールミルで必要に応じて2~8時間混練した。混練物をイオン交換水100質量部に分散した。得られた分散物から減圧下、55℃で有機溶媒を完全に除去し、更に水を除去することにより濃縮し、固形分濃度が15質量%の顔料含有高分子ビニルポリマー粒子の水分散物を得た。
攪拌機、温度計、還流冷却管、及び窒素ガス導入管を備えた2リットル三口フラスコに、メチルエチルケトン350.0gを仕込んで、75℃まで昇温した。反応容器内温度を75℃に保ちながら、フェノキシエチルアクリレート162.0g、メチルメタクリレート180.0g、アクリル酸18.0g、メチルエチルケトン70g、及び「V-601」(和光純薬(株)製)1.44gからなる混合溶液を、2時間で滴下が完了するように等速で滴下した。滴下完了後、「V-601」0.72g、メチルエチルケトン36.0gからなる溶液を加え、75℃で2時間攪拌後、更に「V-601」0.72g、イソプロパノール36.0gからなる溶液を加え、75℃で2時間攪拌した後、85℃に昇温して、更に2時間攪拌を続けた。得られた共重合体の質量平均分子量(Mw)は64000(ゲルパーミエーションクロマトグラフィー(GPC)によりポリスチレン換算で算出、使用カラムはTSKgel SuperHZM-H、TSKgel SuperHZ4000、TSKgel SuperHZ200(東ソー社製))、酸価は38.9(mgKOH/g)であった。
次に、重合溶液668.3gを秤量し、イソプロパノール388.3g、1mol/L
NaOH水溶液145.7mlを加え、反応容器内温度を80℃に昇温した。次に蒸留水720.1gを20ml/minの速度で滴下し、水分散化せしめた。その後、大気圧下にて反応容器内温度80℃で2時間、85℃で2時間、90℃で2時間保った後、反応容器内を減圧にし、イソプロパノール、メチルエチルケトン、蒸留水を合計で913.7g留去し、固形分濃度28.0%の自己分散性ポリマー微粒子(B-01)の水分散物(エマルジョン)を得た。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 28質量部
上記を混合しイエローインク組成物1を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.5であった。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(Pig.-2)を用いた以外は実施例1と同様にしてイエローインク組成物2を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(Pig.-18)を用いた以外は実施例1と同様にしてイエローインク組成物3を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(Pig.-24)を用いた以外は実施例1と同様にしてイエローインク組成物4を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(Pig.-44)を用いた以外は実施例1と同様にしてイエローインク組成物5を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(Pig.-45)を用いた以外は実施例1と同様にしてイエローインク組成物6を得た。
実施例1で用いたIC42マゼンタインクの代わりに以下の組成で作成したマゼンタインク1を用いた以外は実施例1と同様にして画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 10.0質量%
4-メチル-1,2-ペンタンジオール 8.0質量%
トリエタノールアミン 0.9質量%
BYK-UV3510(ビックケミー社) 0.1質量%
C.I.ピグメントバイオレット19 5.0質量%
スチレンアクリル酸共重合樹脂 2.0質量%
純水 残量
計 100.0質量%
実施例1で用いたIC42マゼンタインクの代わりに以下の組成で作成したマゼンタインク組成物2を用いた以外は実施例1と同様にして画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 10.0質量%
4-メチル-1,2-ペンタンジオール 8.0質量%
トリエタノールアミン 0.9質量%
BYK-UV3510(ビックケミー社) 0.1質量%
C.I.ピグメントバイオレット19 3.0質量%とPR202 1.9質量%の固溶体
スチレンアクリル酸共重合樹脂 2.0質量%
純水 残量
計 100.0質量%
実施例1で用いたIC42シアンインクの代わりに以下の組成で作成したシアンインク組成物1を用いた以外は実施例1と同様にして画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 10.0質量%
4-メチル-1,2-ペンタンジオール 8.0質量%
トリエタノールアミン 0.9質量%
BYK-UV3510(ビックケミー社) 0.1質量%
C.I.ピグメントブルー15:3 4.0質量%
スチレンアクリル酸共重合樹脂 1.6質量%
純水 残量
計 100.0質量%
実施例1で用いたIC42シアンインクの代わりに以下の組成で作成したシアンインク組成物2を用いた以外は実施例1と同様にして画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 10.0質量%
4-メチル-1,2-ペンタンジオール 8.0質量%
トリエタノールアミン 0.9質量%
BYK-UV3510(ビックケミー社) 0.1質量%
C.I.ピグメントブルー15: 4 4.0質量%
スチレンアクリル酸共重合樹脂 1.6質量%
純水 残量
計 100.0質量%
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてC.I.ピグメント・イエロー74(チバスペシャリティ社製Iralite YELLOW GO)を用いた以外は実施例1と同様にして比較イエローインク組成物1を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてC.I.ピグメント・イエロー155(クラリアント社製INKJET YELLOW 4G VP2532)を用いた以外は実施例1と同様にして比較イエローインク組成物2を得た。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてC.I.ピグメント・イエロー128(チバスペシャリティ社製CROMOPHTAL YELLOW 8GN)を用いた以外は実施例1と同様にして比較イエローインク組成物3を得た。
濃度が変化したイエローの単色画像パターンを印画させ、記録物の反射濃度を分光光度計GRETAG SPM-50(GRETAG社製)を用いて測定した。
測定条件は、光源D50、光源フィルターなしで、白色標準は絶対白とし、視野角は2°とし、CIEで規定したL*値、a*値、b*値を得た。結果を表2に示す。
評価A:a*=0のとき、b*≧95 かつ b*=95のとき a*≦-5
-5≦a*≦0の場合に、b*≦30 かつ 60≦b*≦95のとき、a*≦-10
評価B:評価Aの条件で、どれか一方が当てはまらないもの
評価C:評価Aの条件で、どれにも当てはまらないもの
〔着色力評価〕
上記イエロー顔料インク液をセイコーエプソン(株)社製インクジェットプリンターPX-V630のイエローインク液のカートリッジに装填し、受像シートはセイコーエプソン(株)社製写真用紙クリスピア<高光沢>にカラー設定:色補正なし、印刷品質:フォトで、イエローのベタ印画パターンを作成し単色濃度で2.0≦ODmaxのものを◎、1.8≦ODmax<2.0のものを○、1.5≦ODmax<1.8のものを△、ODmax<1.5のものを×と評価した。
ウェザーメーター(アトラス社製)を使用し、画像にキセノン光(10万ルックス)を42日照射した。照射開始から一定期間経過ごとに、反射濃度計(X-Rite310TR)を使用して各印刷物に記録されている各色(イエロー、レッド、グリーン)のOD値を測定した。なお、前記反射濃度は、0.7、1.0及び1.8の3点で測定した。
得られた結果から次式:ROD(%)=(D/D0)×100を用いて、光学濃度残存率(ROD)を求めた。(式中、Dは曝露試験後のOD値、D0は曝露試験前のOD値を表す。)
更に、上記試験の結果に基づき、下記の判定基準を用いて、記録物に記録された各色の光堅牢性をA~Dにランク付けた。
[判定基準]
評価A:試験開始から42日後のRODが、何れの濃度でも85%以上である。
評価B:試験開始から42後のRODが、何れか1点の濃度が85%未満になる。
評価C:試験開始から42日後のRODが、何れか2点の濃度が85%未満になる。
評価D:試験開始から42日後のRODが、全ての濃度で85%未満になる。
本試験においては、光に長時間曝露してもRODの低下が少ない記録物が優れる。得られた結果を「光堅牢性」として表2に示した。
オゾンガス濃度が5ppm(25℃;50%RH)に設定された条件下で記録物を21日間、オゾンガスに曝露した。オゾンガス濃度は、APPLICS製オゾンガスモニター(モデル:OZG-EM-01)を用いて設定した。曝露開始から一定期間経過ごとに、反射濃度計(X-Rite310TR)を使用して各印刷物に記録されている各色のOD値を測定した。なお、前記反射濃度は、0.7、1.0及び1.8の3点で測定した。
得られた結果から次式:ROD(%)=(D/D0)×100を用いて光学濃度残存率(ROD)を求めた。(式中、Dは曝露試験後のOD値、D0は曝露試験前のOD値を表す。)
[判定基準]
評価A:試験開始から21日後のRODが、何れの濃度でも85%以上である。
評価B:試験開始から21日後のRODが、何れか1点の濃度が85%未満になる。
評価C:試験開始から21日後のRODが、何れか2点の濃度が85%未満になる。
評価D:試験開始から21日後のRODが、全ての濃度で85%未満になる。
実施例1で用いた3色インクセットを、実施例1で用いたイエローインク組成物1、実施例7で用いたマゼンタインク組成物1、実施例9で用いたシアンインク組成物1、及び以下の組成で作成したブラックインク組成物を用いた4色インクセットに変更した以外は実施例1と同様の操作でグレイ画像パターンを印画させ、初期濃度がOD≒0.7部分のイエロー、マゼンタ、シアンの3色インクを組み合わせてコンポジットで作成したグレイ画像光堅牢性、オゾンガス堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
グリセリン 10.0質量%
4-メチル-1,2-ペンタンジオール 8.0質量%
トリエタノールアミン 0.9質量%
BYK-UV3510(ビックケミー社) 0.1質量%
C.I.ピグメントブルー7(CB) 1.5質量%
スチレンアクリル酸共重合樹脂 0.8質量%
純水 残量
計 100.0質量%
実施例11で用いたマゼンタインク組成物1を実施例8で用いたマゼンタインク組成物2に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表2に示した。
実施例11で用いたシアンインク組成物1を実施例10で用いたシアンインク組成物2に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表2に示した。
実施例11で用いたマゼンタインク組成物1を実施例12で用いたマゼンタインク組成物2に、シアンインク1を実施例13で用いたシアンインク2に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.2に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表2に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.12に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.18に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.24に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.44に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1中の黄色顔料Pig.1をPig.45に変更した以外は実施例11と同様の操作により画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。得られた結果を「光堅牢性・オゾンガス堅牢性」として表3に示した。
実施例11で用いたイエローインク組成物1に替えてえてC.I.ピグメント・イエロー74(チバスペシャリティ社製Iralite YELLOW GO)を用いた以外は実施例11と同様にして比較イエローインク組成物11を得た。
ウェザーメーター(アトラス社製)を使用し、画像にキセノン光(10万ルックス)を42日照射した。照射開始から一定期間経過ごとに、反射濃度計(X-Rite310TR)を使用して各印刷物に記録されているグレイ色のOD値を測定した。なお、前記反射濃度は、0.7で測定した。
得られた結果から次式:ROD(%)=(D/D0)×100を用いて、光学濃度残存率(ROD)を求めた。(式中、Dは曝露試験後のOD値、D0は曝露試験前のOD値を表す。)
更に、上記試験の結果に基づき、下記の判定基準を用いて、記録物に記録されたグレイ色画像の光堅牢性をA~Dにランク付けた。
[判定基準]
評価A:試験開始から42日後のRODが、残存濃度でも85%以上である。
評価B:試験開始から42日後のRODが、残存濃度が70%以上85%未満になる。
評価C:試験開始から42日後のRODが、残存濃度が50%以上70%未満になる。
評価D:試験開始から42日後のRODが、残存濃度で50%未満になる。
本試験においては、光に長時間曝露してもRODの低下が少ない記録物が優れる。得られた結果を「光堅牢性」として表3に示した。
オゾンガス濃度が5ppm(25℃;50%RH)に設定された条件下で記録物を35日間、オゾンガスに曝露した。オゾンガス濃度は、APPLICS製オゾンガスモニター(モデル:OZG-EM-01)を用いて設定した。曝露開始から一定期間経過ごとに、反射濃度計(X-Rite310TR)を使用して各印刷物に記録されている各色のOD値を測定した。なお、前記反射濃度は、0.7で測定した。
得られた結果から次式:ROD(%)=(D/D0)×100を用いて光学濃度残存率(ROD)を求めた。(式中、Dは曝露試験後のOD値、D0は曝露試験前のOD値を表す。)
[判定基準]
評価A:試験開始から35日後のRODが、残存濃度が85%以上である。
評価B:試験開始から35日後のRODが、残存濃度が70%以上85%未満になる。
評価C:試験開始から35日後のRODが、残存濃度が50以上70%未満になる。
評価D:試験開始から35日後のRODが、残存濃度で50%未満になる。
実施例1で用いた水系イエロー顔料分散物を用いたイエローインク組成物1の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物21を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 23質量部
上記を混合しイエローインク組成物21を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.8であった。
実施例1で用いた水系イエロー顔料分散物を用いたイエローインク組成物1の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物22を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 18質量部
上記を混合しイエローインク組成物22を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.7であった。
実施例1で用いた水系イエロー顔料分散物を用いたイエローインク組成物1の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物23を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 13質量部
上記を混合しイエローインク組成物23を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.8であった。
実施例1で用いた水系イエロー顔料分散物を用いたイエローインク組成物1の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物24を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 8質量部
上記を混合しイエローインク組成物24を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは9.0であった。
実施例1で用いた水系イエロー顔料分散物を用いたイエローインク組成物1の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物25を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 3質量部
上記を混合しイエローインク組成物25を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは9.1であった。
実施例3で用いたイエロー顔料(Pig.18)含有高分子ビニルポリマー粒子の水分散物イエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物26を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 23質量部
上記を混合しイエローインク組成物26を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.7であった。
実施例3で用いた水系イエロー顔料分散物を用いたイエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物27を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 18質量部
上記を混合しイエローインク組成物27を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.8であった。
実施例3で用いた水系イエロー顔料分散物を用いたイエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物28を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 13質量部
上記を混合しイエローインク組成物28を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.8であった。
実施例3で用いた水系イエロー顔料分散物を用いたイエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物29を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 8質量部
上記を混合しイエローインク組成物29を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは8.9であった。
実施例3で用いた水系イエロー顔料分散物を用いたイエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物30を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
イオン交換水 3質量部
上記を混合しイエローインク組成物30を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは9.0であった。
実施例3で用いた水系イエロー顔料分散物を用いたイエローインク組成物3の組成を、以下の内容に変更した以外は、同様の操作を実施してイエローインク組成物31を作成し、引き続き、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
グリセリン 5質量部
ジエチレングリコール 5質量部
トリエチレングリコールモノブチルエーテル 5質量部
ポリオキシプロピレングリセリルエーテル 10質量部
ジプロピレングリコール 5質量部
トリエタノールアミン 1質量部
オルフィンE1010(日信化学工業(株)製) 1質量部
自己分散性ポリマー微粒子(B-01)の水分散物 15質量部
上記を混合しイエローインク組成物31を得た。
東亜DKK(株)製pHメータ-WM-50EGにて、インク組成物のpHを測定したところ、pHは9.2であった。
実施例1で用いたアゾ顔料組成物(Pig.-1)に替えてえてアゾ顔料組成物(C.I.PY74を用いた以外は実施例1と同様にして比較イエローインク組成物21を作成し、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
実施例25で用いたイエロー顔料(Pig.1)をC.I.PY74に変更して作成した以外は実施例25と同様にして比較イエローインク組成物22を作成し、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
実施例31で用いたイエロー顔料(Pig.1)をC.I.PY74に変更して作成した以外は実施例31と同様にして比較イエローインク組成物23を作成し、画像パターンを印画させ、色相、印画特性並びに画像堅牢性の評価を行った。
上記実施例1、実施例3、比較例1及び比較例2の組成物を用いた各イエロー顔料インク液と上記記載の方法で作成したマゼンタ顔料インク1、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク液をセイコーエプソン(株)社製インクジェットプリンターPX-V630のイエロー、マゼンタ、シアン、ブラックインク液の各カートリッジに装填し、カラー設定:色補正なし、印刷品質:フォトで、受像シートとしてセイコーエプソン(株)社製写真用紙クリスピア<高光沢>にAdobe PhotoshopでR,G,Bの値を変えた1235色のパッチを印画した記録物を作成した。
この記録物の各色を、グレタグマクベス社製Spectrolinoを用いて、視野角2度、D50光源で測定し、CIEで規定するL*、a*、及びb*値を測定し、各L*値における色再現域を算出した。得られた結果を図20~図23に示す。
図20は、{実施例1のイエロー顔料インク1、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク}のインクセットと{比較例2のイエロー顔料インク、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク}のインクセットのパッチパターンについて、色再現面積を比較した図である。
図20Aは、明度部(L*値=60)における色再現面積を比較した図である。
図20Bは、明度部(L*値=40)における色再現面積を比較した図である。
図21は、{実施例3のイエロー顔料インク、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク}のインクセットと{比較例2のイエロー顔料インク、マゼンタ顔料インク1、シアン顔料インク1、ブラック顔料インク}のインクセットのパッチパターンについて、色再現面積を比較した図である。
図21Aは、明度部(L*値=60)における色再現面積を比較した図である。
図21Bは、明度部(L*値=40)における色再現面積を比較した図である。
図22は、{実施例3のイエロー顔料インク、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク}のインクセットと{比較例1のイエロー顔料インク、マゼンタ顔料インク2、シアン顔料インク1、ブラック顔料インク}のインクセットのパッチパターンについて、色再現面積を比較した図である。
図22Aは、明度部(L*値=60)における色再現面積を比較した図である。
図22Bは、明度部(L*値=40)における色再現面積を比較した図である。
図23は、{実施例3のイエロー顔料インク、マゼンタ顔料インク1、シアン顔料インク1、ブラック顔料インク}のインクセットと{比較例1のイエロー顔料インク、マゼンタ顔料インク1、シアン顔料インク1、ブラック顔料インク}のインクセットのパッチパターンについて、色再現面積を比較した図である。
図23Aは、明度部(L*値=60)における色再現面積を比較した図である。
図23Bは、明度部(L*値=40)における色再現面積を比較した図である。
インクジェット記録物の画像堅牢性と忠実な色再現を両立できる、優良なインクセットを提供できることが確認できた。
本出願は、2009年9月4日出願の日本特許出願(特願2009-205356)及び2010年9月2日出願の日本特許出願(特願2010-197189)に基づくものであり、その内容はここに参照として取り込まれる。
Claims (22)
- イエローインク組成物と、マゼンタインク組成物及びシアンインク組成物の少なくとも1つと、を含んでなるインクセットであって、
イエローインク組成物の着色剤が下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩又は水和物を含んでなるものであり、
マゼンタインク組成物が着色剤としてC.I.ピグメントバイオレット19、C.I.ピグメントレッド122、C.I.ピグメントレッド202、C.I.ピグメントレッド209から選ばれる少なくとも1種を含み、
シアンインク組成物が着色剤としてC.I.ピグメントブルー15:1、C.I.ピグメントブルー15:2、C.I.ピグメントブルー15:3、C.I.ピグメントブルー15:4、C.I.ピグメントブルー15:6から選ばれる少なくとも1種を含むインクセット。
(一般式(1)中、Zは5~8員含窒素ヘテロ環を表し、Y1、Y2、R11、R12は、それぞれ独立に水素原子又は置換基を表し、G1、G2は、それぞれ独立に水素原子、アルキル基、アラルキル基、アルケニル基、アルキニル基、アリール基又はヘテロ環基を表し、W1、W2はそれぞれ独立にアルコキシ基、アミノ基、アルキル基又はアリール基を表す。) - 前記インクセットがさらにブラックインク組成物を含み、該ブラックインク組成物が着色剤としてカーボンブラックを含むことを特徴とする請求項1に記載のインクセット。
- 前記一般式(1)中のW1、W2が、それぞれ独立に総炭素数3以下のアルコキシ基、アミノ基又は総炭素数6以下のアルキルアミノ基であることを特徴とする、請求項1又は2に記載のインクセット。
- 前記一般式(1)中のG1、G2が、それぞれ独立に総炭素数3以下のアルキル基であることを特徴とする請求項1~3のいずれかに記載のインクセット。
- 前記一般式(1)中のZが、6員含窒素ヘテロ環であることを特徴とする請求項1~4のいずれかに記載のインクセット。
- 前記式(3)で表されるアゾ顔料が、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)が7.2°及び25.9°に特徴的なX線回折ピークを有するアゾ顔料又は互変異性体であることを特徴とする請求項7に記載のインクセット。
- 前記式(4)で表されるアゾ顔料が、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)が7.6°、25.6°及び27.7°に特徴的なX線回折ピークを有するアゾ顔料又は互変異性体であることを特徴とする請求項9に記載のインクセット。
- 前記イエローインク組成物中の着色剤の添加量が3~6質量%である請求項1~10のいずれかに記載のインクセット。
- 前記マゼンタインク組成物中の着色剤の添加量が3~6質量%である請求項1~10のいずれかに記載のインクセット。
- 前記シアンインク組成物中の着色剤の添加量が3~6質量%である請求項1~10のいずれかに記載のインクセット。
- 前記ブラックインク組成物中の着色剤の添加量が1~3質量%である請求項2~10のいずれかに記載のインクセット。
- 前記インク組成物が分散剤及び浸透剤の少なくとも1種を更に含む、請求項1~14のいずれか1項に記載のインクセット。
- 前記分散剤がビニルポリマーである請求項15に記載のインクセット。
- 前記浸透剤が多価アルコールの低級アルキルエーテル及びアセチレングリコール類の少なくとも1つである請求項15に記載のインクセット。
- 前記マゼンタインク組成物が、γ型C.I.ピグメントバイオレット19と、C.I.ピグメントレッド202と、の固溶体を少なくとも含む、請求項1~17の何れか1項に記載のインクセット。
- 前記シアンインク組成物の着色剤が、C.I.ピグメントブルー15:3、15:4、15:16からなる群から選ばれる1種又は2種以上の顔料である請求項1~18のいずれか1項に記載のインクセット。
- 請求項1~19のいずれか1項に記載のインクセットのインク組成物を記録媒体に付着させて印刷を行う記録方法。
- 前記記録方法がインク組成物の液滴を吐出し、該液滴を記録媒体に付着させて印刷を行うインクジェット記録方法である請求項20に記載の記録方法。
- 請求項20又は21に記載の記録方法によって印刷された記録物。
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TWI550032B (zh) | 2016-09-21 |
CN102482521B (zh) | 2014-06-04 |
EP2474581A1 (en) | 2012-07-11 |
JP2011074378A (ja) | 2011-04-14 |
EP2474581B1 (en) | 2017-11-29 |
TW201113337A (en) | 2011-04-16 |
CN102482521A (zh) | 2012-05-30 |
JP5624835B2 (ja) | 2014-11-12 |
EP2474581A4 (en) | 2014-12-31 |
US20120156449A1 (en) | 2012-06-21 |
US8580025B2 (en) | 2013-11-12 |
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