WO2013035560A1 - 水性黒色インク組成物、これを用いるインクジェット記録方法、及び着色体 - Google Patents
水性黒色インク組成物、これを用いるインクジェット記録方法、及び着色体 Download PDFInfo
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- WO2013035560A1 WO2013035560A1 PCT/JP2012/071508 JP2012071508W WO2013035560A1 WO 2013035560 A1 WO2013035560 A1 WO 2013035560A1 JP 2012071508 W JP2012071508 W JP 2012071508W WO 2013035560 A1 WO2013035560 A1 WO 2013035560A1
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- JGHGKNIEYCBHJY-UHFFFAOYSA-L magnesium;5-chloro-2-methyl-1,2-thiazol-3-one;dichloride Chemical compound [Mg+2].[Cl-].[Cl-].CN1SC(Cl)=CC1=O JGHGKNIEYCBHJY-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- JMXROTHPANUTOJ-UHFFFAOYSA-H naphthol green b Chemical compound [Na+].[Na+].[Na+].[Fe+3].C1=C(S([O-])(=O)=O)C=CC2=C(N=O)C([O-])=CC=C21.C1=C(S([O-])(=O)=O)C=CC2=C(N=O)C([O-])=CC=C21.C1=C(S([O-])(=O)=O)C=CC2=C(N=O)C([O-])=CC=C21 JMXROTHPANUTOJ-UHFFFAOYSA-H 0.000 description 1
- CTIQLGJVGNGFEW-UHFFFAOYSA-L naphthol yellow S Chemical compound [Na+].[Na+].C1=C(S([O-])(=O)=O)C=C2C([O-])=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 CTIQLGJVGNGFEW-UHFFFAOYSA-L 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- PDDANVVLWYOEPS-UHFFFAOYSA-N nitrous acid;n-propan-2-ylpropan-2-amine Chemical compound [O-]N=O.CC(C)[NH2+]C(C)C PDDANVVLWYOEPS-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- JPMIIZHYYWMHDT-UHFFFAOYSA-N octhilinone Chemical compound CCCCCCCCN1SC=CC1=O JPMIIZHYYWMHDT-UHFFFAOYSA-N 0.000 description 1
- 229920002114 octoxynol-9 Polymers 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229960004321 pentaerithrityl tetranitrate Drugs 0.000 description 1
- LQPLDXQVILYOOL-UHFFFAOYSA-I pentasodium;2-[bis[2-[bis(carboxylatomethyl)amino]ethyl]amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC(=O)[O-])CCN(CC([O-])=O)CC([O-])=O LQPLDXQVILYOOL-UHFFFAOYSA-I 0.000 description 1
- 229940083254 peripheral vasodilators imidazoline derivative Drugs 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- NPANDVNCRMZSFT-UHFFFAOYSA-N propane-1,2-diol;propane-1,3-diol Chemical compound CC(O)CO.OCCCO NPANDVNCRMZSFT-UHFFFAOYSA-N 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229960004063 propylene glycol Drugs 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- WPPDXAHGCGPUPK-UHFFFAOYSA-N red 2 Chemical compound C1=CC=CC=C1C(C1=CC=CC=C11)=C(C=2C=3C4=CC=C5C6=CC=C7C8=C(C=9C=CC=CC=9)C9=CC=CC=C9C(C=9C=CC=CC=9)=C8C8=CC=C(C6=C87)C(C=35)=CC=2)C4=C1C1=CC=CC=C1 WPPDXAHGCGPUPK-UHFFFAOYSA-N 0.000 description 1
- 235000012739 red 2G Nutrition 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical class OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- BQHRKYUXVHKLLZ-UHFFFAOYSA-M sodium 7-amino-2-[[4-[(4-aminophenyl)diazenyl]-2-methoxy-5-methylphenyl]diazenyl]-3-sulfonaphthalen-1-olate Chemical compound [Na+].COc1cc(N=Nc2ccc(N)cc2)c(C)cc1N=Nc1c(O)c2cc(N)ccc2cc1S([O-])(=O)=O BQHRKYUXVHKLLZ-UHFFFAOYSA-M 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000019259 sodium dehydroacetate Nutrition 0.000 description 1
- 229940079839 sodium dehydroacetate Drugs 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical compound [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- LROWVYNUWKVTCU-STWYSWDKSA-M sodium sorbate Chemical compound [Na+].C\C=C\C=C\C([O-])=O LROWVYNUWKVTCU-STWYSWDKSA-M 0.000 description 1
- 235000019250 sodium sorbate Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- DSOWAKKSGYUMTF-GZOLSCHFSA-M sodium;(1e)-1-(6-methyl-2,4-dioxopyran-3-ylidene)ethanolate Chemical compound [Na+].C\C([O-])=C1/C(=O)OC(C)=CC1=O DSOWAKKSGYUMTF-GZOLSCHFSA-M 0.000 description 1
- XNRNJIIJLOFJEK-UHFFFAOYSA-N sodium;1-oxidopyridine-2-thione Chemical compound [Na+].[O-]N1C=CC=CC1=S XNRNJIIJLOFJEK-UHFFFAOYSA-N 0.000 description 1
- HCJLVWUMMKIQIM-UHFFFAOYSA-M sodium;2,3,4,5,6-pentachlorophenolate Chemical compound [Na+].[O-]C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl HCJLVWUMMKIQIM-UHFFFAOYSA-M 0.000 description 1
- FJBHGWADYLMEJG-UHFFFAOYSA-M sodium;3-[[4-[[4-(diethylamino)phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-n-ethylanilino]methyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(CC)CC)=CC=C1C(C=1C=CC(=CC=1)N(CC)CC=1C=C(C=CC=1)S([O-])(=O)=O)=C(C=C1)C=CC1=[N+](CC)CC1=CC=CC(S([O-])(=O)=O)=C1 FJBHGWADYLMEJG-UHFFFAOYSA-M 0.000 description 1
- SXTOGAIYFMTUAD-UHFFFAOYSA-M sodium;4-amino-3-nitrobenzenesulfonate Chemical compound [Na+].NC1=CC=C(S([O-])(=O)=O)C=C1[N+]([O-])=O SXTOGAIYFMTUAD-UHFFFAOYSA-M 0.000 description 1
- 229950006451 sorbitan laurate Drugs 0.000 description 1
- 235000011067 sorbitan monolaureate Nutrition 0.000 description 1
- 239000001593 sorbitan monooleate Substances 0.000 description 1
- 235000011069 sorbitan monooleate Nutrition 0.000 description 1
- 229940035049 sorbitan monooleate Drugs 0.000 description 1
- 239000001587 sorbitan monostearate Substances 0.000 description 1
- 235000011076 sorbitan monostearate Nutrition 0.000 description 1
- 229940035048 sorbitan monostearate Drugs 0.000 description 1
- 229960005078 sorbitan sesquioleate Drugs 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 1
- JAHOBQDOBYFPTP-UHFFFAOYSA-J tetrasodium;5-[[4-[[4-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-7-sulfonatonaphthalen-1-yl]diazenyl]-2,5-dimethylphenyl]diazenyl]naphthalene-1,3,6-trisulfonate Chemical compound [Na+].[Na+].[Na+].[Na+].CC1=CC(N=NC=2C3=CC(=CC(=C3C=CC=2S([O-])(=O)=O)S([O-])(=O)=O)S([O-])(=O)=O)=C(C)C=C1N=NC(C1=CC(=CC=C11)S([O-])(=O)=O)=CC=C1NC1=NC(N)=NC(Cl)=N1 JAHOBQDOBYFPTP-UHFFFAOYSA-J 0.000 description 1
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 description 1
- 229950006389 thiodiglycol Drugs 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- JSPLKZUTYZBBKA-UHFFFAOYSA-N trioxidane Chemical class OOO JSPLKZUTYZBBKA-UHFFFAOYSA-N 0.000 description 1
- WDWBPYFNRWQKNZ-UHFFFAOYSA-K trisodium 5-[(4-anilino-6-chloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[(2-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate Chemical compound [Na+].[Na+].[Na+].[O-]S(=O)(=O)C1=CC2=CC(S([O-])(=O)=O)=CC(NC=3N=C(NC=4C=CC=CC=4)N=C(Cl)N=3)=C2C(O)=C1N=NC1=CC=CC=C1S([O-])(=O)=O WDWBPYFNRWQKNZ-UHFFFAOYSA-K 0.000 description 1
- MBAYVHBJJXOOIY-UHFFFAOYSA-K trisodium 7-[[4-chloro-6-(3-sulfonatoanilino)-1,3,5-triazin-2-yl]-methylamino]-4-hydroxy-3-[(2-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].CN(c1ccc2c(O)c(N=Nc3ccccc3S([O-])(=O)=O)c(cc2c1)S([O-])(=O)=O)c1nc(Cl)nc(Nc2cccc(c2)S([O-])(=O)=O)n1 MBAYVHBJJXOOIY-UHFFFAOYSA-K 0.000 description 1
- VZPXDCIISFTYOM-UHFFFAOYSA-K trisodium;1-amino-4-[4-[[4-chloro-6-(3-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-3-sulfonatoanilino]-9,10-dioxoanthracene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].C1=2C(=O)C3=CC=CC=C3C(=O)C=2C(N)=C(S([O-])(=O)=O)C=C1NC(C=C1S([O-])(=O)=O)=CC=C1NC(N=1)=NC(Cl)=NC=1NC1=CC=CC(S([O-])(=O)=O)=C1 VZPXDCIISFTYOM-UHFFFAOYSA-K 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- 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
- C09D11/328—Inkjet printing inks characterised by colouring agents characterised by dyes
-
- 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
Definitions
- the present invention relates to an aqueous black ink composition, an ink jet recording method using the same, and a colored body.
- a recording method using an ink jet printer which is one of the representative methods among various color recording methods, generates ink droplets and attaches them to various recording materials (paper, film, fabric, etc.) for recording. Is to do.
- This method has a feature that it is quiet because there is no direct contact between the recording head and the recording material, and it is easy to reduce the size and speed. Large growth is expected in the future.
- inks for fountain pens, felt-tip pens and the like and inks for ink jet printing aqueous inks in which water-soluble pigments are dissolved in an aqueous medium have been used.
- a water-soluble organic solvent is generally added to prevent clogging of the ink at the pen tip or the ink discharge nozzle.
- These inks provide a recorded image with sufficient density, do not cause clogging of the pen tip and nozzles, have good drying properties on recording materials, have little bleeding, and have storage stability. It is required to be excellent.
- the water-soluble dye used is required to have particularly high solubility in water and high solubility in the water-soluble organic solvent added to the ink.
- the formed image is required to have image fastness such as water resistance and light fastness and color reproducibility, and not only high image fastness but also a balance of each color is important.
- inkjet printers Due to recent developments in inkjet technology, the speed of printing in inkjet printing has been dramatically improved. For this reason, there is a movement to use an inkjet printer in the same manner as a laser printer using electronic toner for printing a document on plain paper, which is the main use in commercial printing and office environments. Ink jet printers have the advantage that the type of recording paper is not limited and the price of the machine is relatively low. In particular, ink jet printers are spreading in small to medium-sized office environments such as SOHO. As described above, when an inkjet printer is used for printing on plain paper, color development and water resistance tend to be more important among qualities required for printed matter. In order to satisfy these performances, a method of using a pigment ink has been proposed.
- the pigment ink is a dispersion in which a solid pigment is dispersed instead of a solution
- the problem that the storage stability of the ink is poor when the pigment ink is used, the nozzle of the printer head is clogged, etc. Is more likely to occur compared to dye inks.
- a dye ink since the dye which is a pigment component is dissolved in the ink, problems caused by such a pigment ink are relatively unlikely to occur.
- dye inks are generally significantly inferior to pigment inks in particular in terms of color developability, light resistance and water resistance, improvements are strongly desired.
- the performance required for ink compositions intended for printing on plain paper includes color reproducibility (color development, ie, saturation and brightness), storage stability, ozone gas resistance (oxidizing gas) Resistance), moisture resistance, and the like, and no ink composition that is sufficiently satisfactory in any of them has been proposed yet.
- the ink composition used for inkjet recording and the colored bodies colored thereby will have light resistance, ozone gas resistance, water resistance, moisture resistance. There is a strong demand for further improvements in sensor reading compatibility.
- Ink of various hues is prepared from various dyes, and among them, black ink is an important ink used for both monocolor images and full color images.
- black ink is an important ink used for both monocolor images and full color images.
- there are many technical difficulties in developing pigments that are neutral in hue and high in color density and excellent in fastness in both the dark color gamut and light color gamut and a great deal of research and development has been conducted.
- the hue differs depending on the medium (recording material) compared to the case where the ink is prepared with a single pigment. In particular, problems such as large discoloration are likely to occur.
- azo pigments of which C.I. I. Azo dyes such as Direct Black 19 have problems such as low optical density of images, water resistance, light resistance, and insufficient ozone gas resistance.
- C.I. I. Azo dyes such as Direct Black 19 have problems such as low optical density of images, water resistance, light resistance, and insufficient ozone gas resistance.
- some azo metal-containing dyes that have been proposed have good light resistance, but they contain metal ions, which is undesirable for safety and the environment for living organisms, and extremely low ozone gas resistance.
- problems such as. Many of these have been proposed, but have yet to provide products that fully satisfy market demands.
- Patent Documents 1 to 3 have been proposed as black inks in which a dye for color adjustment is further blended with a black dye, but a product that sufficiently satisfies the market demand has not been provided.
- Patent Documents 4 to 5 The dyes used in the present invention are described in Patent Documents 4 to 5. However, these are assumed to be applied to special paper or electrophotographic paper provided with a specific receiving layer, and the effect of printing on plain paper cannot be said to be sufficient. Therefore, the present invention is realized by having a sufficient characteristic (for example, moisture resistance) not only on special paper and electrophotographic paper provided with the specific receiving layer but also on plain paper.
- black colorants suitable for dye inks for inkjet recording include the above-described C.I. I. A compound of the formula (1) of the present application described in Direct Black 19 and Patent Document 6 is known.
- An object of the present invention is to provide an aqueous black ink composition having a high printing density, a low reflectance in the near-infrared light region, and an excellent near-infrared light absorbability.
- C.I. which is a specific dye as a pigment component of black ink.
- Acid Black 2 an aqueous black ink composition having improved hue, various properties, and improved sensor compatibility in the near infrared region can be obtained. It came to complete.
- the present invention 1) As a pigment component, (i) C.I. I. An aqueous black ink composition containing Acid Black 2; 2) And (ii) a water-based black ink composition as described in 1) above containing a dye having three or more azo bonds (—N ⁇ N—) in the molecule, 3) The aqueous black ink composition according to 2) above, wherein the dye having three or more azo bonds (—N ⁇ N—) in the molecule is a black dye represented by the following formula (1) or a salt thereof: (In formula (1), R 1 , R 2 , R 5 , R 6 and R 7 are each independently a hydrogen atom, a halogen atom, a cyano group, a hydroxy group, a carboxy group, a sulfo group, a sulfamoyl group, N -Alkylaminosulfonyl group, N-phenylaminosulfonyl group, (C1-C4) alkyls
- N represents 0 or 1.
- R 1 is a carboxy group or a sulfo group
- R 2 is a hydrogen atom
- R 6 is a nitro group, a carboxy group, or a sulfo group
- n is 1,
- R 1 is a sulfo group and the substitution position of R 1 is ortho to the azo group
- the substitution position of the nitro group is para to the azo group
- the substitution position of R 1 is para to the azo group
- the substitution position of R 1 is para to the azo group
- the substitution position of R 1 is para to the azo group
- the aqueous black ink composition according to the description 7) The water-based black ink composition according to 3), wherein the black dye represented by the formula (1) is a black dye represented by the following formula (2): (In the formula (2), R 1 is a sulfo group, and when the substitution position of R 1 is ortho to the azo group, the substitution position of the nitro group is para to the azo group, and the substitution position of R 1 Is the para position relative to the azo group, the substitution position of the nitro group is the ortho position relative to the azo group.) 8) Further, (iii) C.I. I. Direct Yellow 86, 132, and 142, C.I. I. Direct Orange 17 and 39, C.I. I.
- composition 10) The water-based black ink composition according to any one of 1) to 9) above, further comprising a water-soluble organic solvent, 11) Further, the water-based black ink composition according to any one of 1) to 10) above, which contains urea, 12) An inkjet recording method using the water-based black ink composition according to any one of 1) to 11) above; 13) The inkjet recording method according to 12) above, wherein the recording material in the inkjet recording method is an information transmission sheet, 14) An ink jet printer loaded with a container containing the aqueous black ink composition according to any one of 1) to 11) above; 15) A colored body colored with the water-based black ink composition according to any one of 1) to 11) above; About.
- an aqueous black ink composition having a high printing density, a low reflectance in the near-infrared light region, and an excellent near-infrared light absorbability can be provided.
- the water-based black ink composition of the present invention contains (i) C.I. I. Contains Acid Black 2.
- C.I. I. Contains Acid Black 2.
- Acid Black 2 can be obtained from Orient Chemical Co., Ltd. as WATER BLACK R-455, R-510.
- the water-based black ink composition of the present invention contains C.I. I.
- the color tone can be adjusted by blending various dyes other than Acid Black 2, but dye (ii) having 3 or more azo bonds (—N ⁇ N—) in the molecule is particularly preferable.
- dye (ii) having 3 or more azo bonds (—N ⁇ N—) in the molecule is particularly preferable.
- a water-based black ink composition having excellent color developability, water resistance and light resistance can be obtained.
- higher color developability water resistance and light resistance can be realized.
- the black dye represented by the above formula (1) is used as the black dye, it is possible to achieve both high color development and light resistance, ozone resistance, and water resistance, A very excellent aqueous black ink composition can be realized.
- the number of carbon atoms in the alkyl group, alkoxy group, acyl group and the like not particularly described is not particularly limited as long as the effects of the present invention can be achieved. Usually, it has about 1 to 20 carbon atoms, preferably about 1 to 10 carbon atoms. More preferably, the alkyl group, the alkoxy group, or the aliphatic acyl group has about 1 to 4 carbon atoms, and the aromatic acyl group has about 7 to 11 carbon atoms. Specifically, benzoyl Group, naphthoyl group and the like.
- examples of the N-alkylaminosulfonyl group include, for example, an N-methylaminosulfonyl group, an N-ethylaminosulfonyl group, N- (n-butyl) aminosulfonyl group, N, N-dimethylaminosulfonyl group, N, N-di (n-propyl) aminosulfonyl group and the like can be mentioned.
- examples of the (C1-C4) alkylsulfonyl group optionally substituted with a hydroxy group include, for example, methylsulfonyl, Examples include ethylsulfonyl, propylsulfonyl, butylsulfonyl, hydroxyethylsulfonyl, 2-hydroxypropylsulfonyl and the like.
- Examples of the acyl group in R 1 , R 2 , R 5 , R 6 , and R 7 in the above formula (1) include acetyl, propionyl, butyryl, isobutyryl, benzoyl, naphthoyl, and the like.
- the (C1-C4) alkyl group optionally substituted with at least one group selected from the group consisting of a hydroxy group and a (C1-C4) alkoxy group
- Examples include, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, methoxyethyl, 2- Examples include ethoxyethyl, n-propoxyethyl, isopropoxyethyl, n-butoxyethyl, methoxypropyl, ethoxypropyl, n-propoxypropyl, isopropoxybutyl, n-propoxybutyl and the like.
- R 1 to R 7 in the above formula (1) may be substituted with at least one group selected from the group consisting of a hydroxy group, a (C1 to C4) alkoxy group, a sulfo group, and a carboxy group
- C1-C4 alkoxy groups include, for example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, 2-hydroxyethoxy, 2-hydroxypropoxy, 3-hydroxypropoxy , Methoxyethoxy, ethoxyethoxy, n-propoxyethoxy, isopropoxyethoxy, n-butoxyethoxy, methoxypropoxy, ethoxypropoxy, n-propoxypropoxy, isopropoxybutoxy, n-propoxybutoxy, 2-hydroxyethoxyethoxy, carboxy Butoxy, 2-carboxyethoxy, 3-carboxypropoxy, 3-sulfopropoxy, 4-sulfobutoxy and the
- examples of the acylamino group include acetylamino, propionylamino, butyrylamino, isobutyrylamino, benzoylamino, naphthoylamino, and the like.
- examples of the alkylsulfonylamino group include methylsulfonylamino, ethylsulfonylamino, propylsulfonylamino and the like.
- Examples of the phenylsulfonylamino group which may be substituted with at least one group selected from the group consisting of a halogen atom, an alkyl group, and a nitro group in R 1 to R 7 in the above formula (1) examples include benzenesulfonylamino, toluenesulfonylamino, chlorobenzenesulfonylamino, nitrobenzenesulfonylamino and the like.
- R 1 and R 2 in the above formula (1) are hydrogen atom, chlorine atom, bromine atom, cyano group, carboxy group, sulfo group, sulfamoyl group, N-methylaminosulfonyl group, N-phenylaminosulfonyl group, methyl Sulfonyl, hydroxyethylsulfonyl, phospho, nitro, acetyl, benzoyl, ureido, methyl, methoxy, ethyl, ethoxy, propyl, propoxy, 2-hydroxyethoxy, 2-methoxy An ethoxy group, a 2-ethoxyethoxy group, a 3-sulfopropoxy group, a 4-sulfobutoxy group, a carboxymethoxy group, a 2-carboxyethoxy group, an acetylamino group, a benzoylamino group, and more preferably a hydrogen atom, chlorine Atom, cyano group,
- R 1 is a carboxy group or a sulfo group, and a sulfo group is particularly preferred.
- R 2 is particularly preferably a hydrogen atom.
- R 3 and R 4 in the above formula (1) are hydrogen atom, cyano group, carboxy group, sulfo group, nitro group, methyl group, methoxy group, ethyl group, ethoxy group, propyl group, propoxy group, 2-hydroxy group.
- R 3 is a sulfo group
- R 4 is a combination of hydrogen atoms, or R 3 is a 3-sulfopropoxy group
- R 4 is a methyl group, and the former is most preferable.
- R 5 to R 7 in the above formula (1) are hydrogen atom, chlorine atom, bromine atom, cyano group, carboxy group, sulfo group, sulfamoyl group, N-methylaminosulfonyl group, N-phenylaminosulfonyl group, methyl Sulfonyl, hydroxyethylsulfonyl, phospho, nitro, acetyl, benzoyl, ureido, methyl, methoxy, ethyl, ethoxy, propyl, propoxy, 2-hydroxyethoxy, 2-methoxy An ethoxy group, a 2-ethoxyethoxy group, a 3-sulfopropoxy group, a 4-sulfobutoxy group, a carboxymethoxy group, a 2-carboxyethoxy group, an acetylamino group, a benzoylamino group, and more preferably a hydrogen atom, chlorine Atom, cyano group,
- R 5 is a hydrogen atom, a carboxy group or a sulfo group
- particularly preferred R 6 is a nitro group, a carboxy group or a sulfo group
- particularly preferred R 7 is a hydrogen atom.
- R 5 is a hydrogen atom
- R 6 is a sulfo group
- R 7 is a combination of hydrogen atoms
- R 5 is a sulfo group
- R 6 is a nitro group
- R 7 is a hydrogen atom, and the former is most preferable.
- R 1 to R 7 are more preferably a combination of the substituents mentioned as preferred above, more preferably a combination of a preferred substituent and a more preferred substituent. A combination of preferred substituents is most preferred.
- the most preferable black dye represented by the above formula (1) is the black dye represented by the above formula (2), which is particularly effective for color development, light resistance, ozone gas resistance and water resistance.
- any of the black dye represented by the above formula (1) and the black dye represented by the above formula (2) can be used as a salt thereof.
- the salt of the compound represented by the above formula (1) or (2) independently means an inorganic or organic cation salt.
- inorganic salts include alkali metal salts, alkaline earth metal salts, and ammonium salts
- preferred inorganic salts are lithium, sodium, potassium salts, and ammonium salts.
- organic cation salt include, but are not limited to, a salt of a compound represented by the following formula (3).
- Z 1 , Z 2 , Z 3 , and Z 4 each independently represent a group selected from the group consisting of a hydrogen atom, an alkyl group, a hydroxyalkyl group, and a hydroxyalkoxyalkyl group. , At least one is a group other than a hydrogen atom.
- the alkyl group of Z 1 , Z 2 , Z 3 and Z 4 in the above formula (3) is preferably a (C1 to C4) alkyl group, and specific examples include methyl, ethyl, n-propyl, isopropyl, n -Butyl, isobutyl, sec-butyl, tert-butyl and the like.
- hydroxyalkyl groups include hydroxy- (C1-C4) alkyl groups such as hydroxymethyl, hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, 2-hydroxybutyl and the like. Can be mentioned.
- hydroxyalkoxyalkyl groups include hydroxyethoxymethyl, 2-hydroxyethoxyethyl, 3-hydroxyethoxypropyl, 2-hydroxyethoxypropyl, 4-hydroxyethoxybutyl, 3-hydroxyethoxybutyl, 2-hydroxyethoxybutyl, etc.
- examples include hydroxy (C1-C4) alkoxy- (C1-C4) alkyl groups. Of these, hydroxyethoxy- (C1-C4) alkyl groups are preferred. Particularly preferred are a hydrogen atom; methyl; hydroxy- (C1-C4) such as hydroxymethyl, hydroxyethyl, 3-hydroxypropyl, 2-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, 2-hydroxybutyl, etc.
- Alkyl group such as hydroxyethoxymethyl, 2-hydroxyethoxyethyl, 3-hydroxyethoxypropyl, 2-hydroxyethoxypropyl, 4-hydroxyethoxybutyl, 3-hydroxyethoxybutyl, 2-hydroxyethoxybutyl, etc. C4) an alkyl group.
- organic cation salt examples include monoethanolamine salts, diethanolamine salts, triethanolamine salts, monoisopropanolamine salts, diisopropanolamine salts, and triisopropanolamine salts.
- lithium and sodium salts are particularly preferred.
- the black dye represented by the above formula (1) can be synthesized, for example, by the following method.
- the structural formula of the compound in each step is expressed in the form of a free acid.
- n has the same meaning as in the above formula (1).
- n has the same meaning as in the above formula (1).
- n has the same meaning as in the above formula (1).
- the compound represented by the following formula (7) is diazotized by a conventional method, and the resulting diazo compound and the compound represented by the above formula (6) are subjected to a coupling reaction, thereby being represented by the following formula (8). To obtain a compound.
- the monoazo compound represented by the following formula (10) is diazotized by a conventional method, and the obtained diazo compound and the compound represented by the above formula (9) are subjected to a coupling reaction, thereby obtaining the above formula (1).
- the black dye represented by (2) or its salt can be obtained.
- the monoazo compound represented by the above formula (10) can be synthesized by a conventional method.
- the compound represented by the following formula (11) is diazotized by a conventional method, and the obtained diazo compound and the compound represented by the following formula (12) are subjected to a coupling reaction, whereby the above formula (10)
- the monoazo compound represented can be obtained.
- R 5 to R 7 have the same meaning as in the above formula (1).
- the compound represented by the following formula (13) is diazotized by a conventional method, and the resulting diazo compound and the compound represented by the following formula (14) are subjected to a coupling reaction, whereby the following formula (15) is obtained.
- the monoazo compound represented by the above formula (15) can be obtained by hydrolyzing the compound with an acid or an alkali.
- the esterification reaction between the compound represented by the above formula (4) and p-toluenesulfonyl chloride is carried out by a method known per se. It is advantageous to carry out the reaction in water or a water-soluble organic solvent, for example at a temperature of 20 to 100 ° C., preferably 30 to 80 ° C., and at a neutral to alkaline pH value. It is preferably carried out at a neutral to weakly alkaline pH value, for example, pH 7-10. The pH value is adjusted by adding a base.
- Examples of the base that can be used include alkali metal hydroxides such as lithium hydroxide and sodium hydroxide, alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate, and acetates such as sodium acetate.
- alkali metal hydroxides such as lithium hydroxide and sodium hydroxide
- alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate
- acetates such as sodium acetate.
- the compound represented by the above formula (4) and p-toluenesulfonyl chloride are used in approximately stoichiometric amounts.
- the diazotization of the compound represented by the above formula (5) is carried out by a method known per se, for example, a nitrite such as -5 to 30 ° C., preferably 5 to 15 ° C. in an inorganic acid medium. It is carried out using an alkali metal nitrite such as sodium nitrite.
- the coupling between the diazotized compound represented by the above formula (5) and 4-amino-5-naphthol-1,7-disulfonic acid is carried out under conditions known per se. It is advantageous to carry out the reaction in water or a water-soluble organic solvent, for example at a temperature of ⁇ 5 to 30 ° C., preferably 5 to 25 ° C., and at an acidic to neutral pH value.
- the coupling bath is acidified but is preferably carried out at an acidic to slightly acidic pH value, for example pH 1-4. The pH value is adjusted by adding a base.
- Examples of the base include alkali metal hydroxides such as lithium hydroxide and sodium hydroxide, alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate, acetates such as sodium acetate, ammonia and organic amines. It can.
- alkali metal hydroxides such as lithium hydroxide and sodium hydroxide
- alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate
- acetates such as sodium acetate, ammonia and organic amines.
- the compound represented by the above formula (5) and 4-amino-5-naphthol-1,7-disulfonic acid are used in approximately stoichiometric amounts.
- the diazotization of the compound represented by the above formula (7) is also carried out by a method known per se, for example, a nitrite such as -5 to 30 ° C, preferably 0 to 15 ° C in an inorganic acid medium. It is carried out using an alkali metal nitrite such as sodium nitrite.
- the coupling between the diazotized compound of the compound represented by the above formula (7) and the compound represented by the above formula (6) is also carried out under known conditions. It is advantageous to carry out the reaction in water or a water-soluble organic solvent, for example at a temperature of ⁇ 5 to 30 ° C., preferably 10 to 25 ° C., and at a weakly acidic to alkaline pH value. It is preferably carried out at a weakly acidic to weakly alkaline pH value, for example, pH 5 to 10, and the pH value is adjusted by adding a base.
- Examples of the base include alkali metal hydroxides such as lithium hydroxide and sodium hydroxide, alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate, acetates such as sodium acetate, ammonia and organic amines. it can.
- the diazotized compound of the compound represented by the above formula (7) and the compound represented by the above formula (6) are used in a substantially stoichiometric amount.
- the production of the compound represented by the above formula (9) by hydrolysis of the compound represented by the above formula (8) is also carried out by a method known per se.
- An advantageous method is heating in an aqueous alkaline medium.
- a solution containing the compound represented by the above formula (8) to adjust the pH to 9.5 or higher, For example, it is carried out by heating to a temperature of 20 to 150 ° C., preferably 30 to 100 ° C.
- the pH value of the reaction solution is preferably maintained at 9.5 to 11.5.
- the pH value is adjusted by adding a base.
- the base those described above can be used.
- the diazotization of the compound represented by the above formula (10) is also carried out by a method known per se.
- nitrite such as nitrous acid is used in an inorganic acid medium at a temperature of, for example, ⁇ 5 to 30 ° C., preferably 0 to 15 ° C. It is carried out using an alkali metal nitrite such as sodium nitrate.
- the coupling between the diazotized compound of the compound represented by the above formula (10) and the compound represented by the above formula (9) is also carried out under known conditions. It is advantageous to carry out the reaction in water or a water-soluble organic solvent, for example at a temperature of ⁇ 5 to 30 ° C., preferably 10 to 25 ° C., and at a weakly acidic to alkaline pH value. It is preferably carried out at a weakly acidic to weakly alkaline pH value, for example, pH 5 to 10, and the pH value is adjusted by adding a base.
- Examples of the base include alkali metal hydroxides such as lithium hydroxide and sodium hydroxide, alkali metal carbonates such as lithium carbonate, sodium carbonate and potassium carbonate, acetates such as sodium acetate, ammonia and organic amines. it can.
- the diazotized product of the compound represented by the above formula (10) and the compound represented by the above formula (9) are used in a substantially stoichiometric amount.
- the black dye represented by the above formula (1) or (2) can be isolated in the form of a free acid by addition of a mineral acid after the coupling reaction, and from this, it is inorganic by washing with water or acidified water. Salt can be removed. Next, the acid type dye having a low salt content obtained in this manner can be neutralized with a desired inorganic or organic base in an aqueous medium to form a corresponding salt solution.
- inorganic bases include, for example, alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide, ammonium hydroxide, or alkali metal carbonates such as lithium carbonate, sodium carbonate, and potassium carbonate. Is mentioned.
- the organic base include, but are not limited to, organic amines such as alkanolamines such as diethanolamine and triethanolamine.
- the water-based black ink composition of the present invention includes (i) C.I. I. It is an ink composition containing 0.1 to 10% by mass, preferably 0.5 to 5% by mass, more preferably 1 to 4% by mass of Acid Black 2, and using water as a main medium. Further, (ii) when the compound represented by the above formula (1) or (2) is contained as a black dye, it is 0.1 to 20% by mass, preferably 1 to 10% by mass, more preferably 2 to 2%. 8% by mass is contained.
- aqueous black ink composition of the present invention is used as an ink for an inkjet printer, C.I. I.
- a compound having a low content of metal cation chlorides, sulfates and other inorganic substances Is, for example, about 1% by mass or less (to the dye base).
- the aqueous black ink composition of the present invention may further contain a dye (iii) having another hue for the purpose of adjusting the color tone.
- the other dye is preferably a reactive dye, an acid dye, or a direct dye, and more preferably a direct dye, from the viewpoint of dyeing properties of the dye on the recording material.
- reactive dyes that the aqueous black ink composition of the present invention may contain include C.I.
- Yellow dyes such as Reactive Yellow 2, 3, 18, 81, 84, 85, 95, 99, 102;
- Orange dyes such as Reactive Orange 5, 9, 12, 13, 35, 45, 99;
- Brown dyes such as Reactive Brown 2, 8, 9, 17, 33;
- Red dyes such as Reactive Red 3, 3: 1, 4, 13, 24, 29, 31, 33, 125, 151, 206, 218, 226, 245;
- Violet dyes such as Reactive Violet 1, 24;
- Blue dyes such as Reactive Blue 2, 5, 10, 13, 14, 15, 15: 1, 49, 63, 71, 72, 75, 162, 176;
- Green dyes such as Reactive Green 5, 8, 19;
- And black dyes such as Reactive Black 1, 8, 23, 39, and the like.
- Violet dyes such as Acid Violet 17, 19, 21, 42, 43, 47, 48, 49, 54, 66, 78, 90, 97, 102, 109, 126; I. Acid Blue 1, 7, 9, 15, 23, 25, 40, 61: 1, 62, 72, 74, 80, 83, 90, 92, 103, 104, 112, 113, 114, 120, 127, 127: 1, 128, 129, 138, 140, 142, 156, 158, 171, 182, 185, 193, 199, 201, 203, 204, 205, 207, 209, 220, 221, 224, 225, 229, 230, 239, 249, 258, 260, 264, 277: 1, 278, 279, 280, 284, 290, 296, 298, 300, 317, 324, 333, 335, 338, 342, 350, and other blue dyes; C.
- (I) is 20 to 70% by mass, (ii) is 20 to 70% by mass, and (iii) is 5 to 50% in the total mass of the pigment component (I).
- the content of (i) is preferably 30 to 60% by mass, the above (ii) is 30 to 60% by mass, and the (iii) is particularly preferably 5 to 20% by mass.
- the water-based black ink composition of the present invention is prepared using water as a medium, and optionally contains a water-soluble organic solvent (an organic solvent miscible with water) and an ink preparation agent as long as the effects of the present invention are not impaired. May be.
- the pH of the ink composition is preferably pH 6 to 10 and more preferably pH 7 to 10 from the viewpoint of improving storage stability.
- the surface tension of the colored composition is preferably 25 to 70 mN / m, more preferably 25 to 60 mN / m.
- the viscosity of the coloring composition is preferably 30 mPa ⁇ s or less, and more preferably 20 mPa ⁇ s or less.
- Examples of the water-soluble organic solvent used in the preparation of the aqueous black ink composition include C1-C4 alkanols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, and tert-butanol; N, N Carboxylic acid amides such as dimethylformamide and N, N-dimethylacetamide; lactams such as 2-pyrrolidone and N-methylpyrrolidin-2-one; 1,3-dimethylimidazolidin-2-one and 1,3-dimethylhexa Cyclic ureas such as hydropyrimido-2-one; ketones or ketoalcohols such as acetone, methyl ethyl ketone, 2-methyl-2-hydroxypentan-4-one; cyclic ethers such as tetrahydrofuran, dioxane; ethylene glycol, 1, 2-propylene glycol 1,3-prop
- 2-pyrrolidone isopropyl alcohol, glycerin, diglycerin, butyl carbitol, ethylene glycol, diethylene glycol, and propylene glycol are preferable, and 2-pyrrolidone, isopropyl alcohol, glycerin, Butyl carbitol.
- These organic solvents may be used alone or in combination of two or more.
- the preferable content of the water-soluble solvent is 0 to 50% by mass, more preferably 25 to 50% by mass, based on the total amount of the aqueous black ink composition of the present invention.
- Examples of the ink preparation used in the preparation of the aqueous black ink composition include antifungal agents, preservatives, pH adjusters, chelating reagents, rust inhibitors, water-soluble ultraviolet absorbers, water-soluble polymer compounds, and dyes. Examples include solubilizers, antioxidants, and surfactants.
- antifungal agent examples include sodium dehydroacetate, sodium benzoate, sodium pyridinethione-1-oxide, ethyl p-hydroxybenzoate, 1,2-benzisothiazolin-3-one, and salts thereof. . These are preferably used in the aqueous black ink composition in an amount of 0.02 to 1.00% by mass.
- preservatives include organic sulfur, organic nitrogen sulfur, organic halogen, haloallylsulfone, iodopropargyl, N-haloalkylthio, nitrile, pyridine, 8-oxyquinoline, benzothiazole. , Isothiazoline, dithiol, pyridine oxyd, nitropropane, organotin, phenol, quaternary ammonium salt, triazine, thiazine, anilide, adamantane, dithiocarbamate, brominated indanone, benzyl Examples include bromoacetate-based and inorganic salt-based compounds.
- Examples of the organic halogen compound include sodium pentachlorophenol
- examples of the pyridine oxido compound include sodium 2-pyridinethiol-1-oxide
- examples of the inorganic salt compound include anhydrous sodium acetate.
- examples of the isothiazoline compounds include 1,2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, 5 -Chloro-2-methyl-4-isothiazolin-3-one magnesium chloride, 5-chloro-2-methyl-4-isothiazolin-3-one calcium chloride, 2-methyl-4-isothiazolin-3-one calcium chloride, etc.
- Other antiseptic / antifungal agents include sodium sorbate, sodium benzoate and the like.
- any substance can be used as long as it can control the pH of the ink within a range of 5 to 11, for example, without adversely affecting the prepared ink.
- alkanolamines such as diethanolamine, triethanolamine and N-methyldiethanolamine
- hydroxides of alkali metals such as lithium hydroxide, sodium hydroxide and potassium hydroxide
- lithium carbonate And alkali metal carbonates such as sodium carbonate, sodium hydrogen carbonate and potassium carbonate
- inorganic bases such as potassium acetate, sodium silicate and disodium phosphate;
- chelating reagent examples include sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, sodium hydroxyethylethylenediaminetriacetate, sodium diethylenetriaminepentaacetate, sodium uracil diacetate and the like.
- rust preventive examples include acidic sulfite, sodium thiosulfate, ammonium thioglycolate, diisopropylammonium nitrite, pentaerythritol tetranitrate, dicyclohexylammonium nitrite and the like.
- water-soluble ultraviolet absorbers examples include sulfonated benzophenone compounds, benzotriazole compounds, salicylic acid compounds, cinnamic acid compounds, and triazine compounds.
- water-soluble polymer compound examples include polyvinyl alcohol, cellulose derivatives, polyamines and polyimines.
- dye solubilizer examples include ⁇ -caprolactam, ethylene carbonate, urea and the like.
- urea when contained, it is one of the preferred embodiments of the present invention.
- organic and metal complex anti-fading agents can be used.
- organic anti-fading agents include hydroquinones, alkoxyphenols, dialkoxyphenols, phenols, anilines, amines, indanes, chromans, alkoxyanilines, heterocycles, and the like.
- surfactant examples include known surfactants such as anionic, cationic, and nonionic surfactants.
- Anionic surfactants include alkyl sulfonates, alkyl carboxylates, ⁇ -olefin sulfonates, polyoxyethylene alkyl ether acetates, N-acyl amino acids and their salts, N-acyl methyl taurates, alkyl sulfates Polyoxyalkyl ether sulfate, alkyl sulfate polyoxyethylene alkyl ether phosphate, rosin acid soap, castor oil sulfate ester, lauryl alcohol sulfate ester, alkylphenol type phosphate ester, alkyl type phosphate ester, alkyl allyl sulfone hydrochloride, diethyl Examples include sulfosuccinate, diethylhexylsylsulfosuccinate, and dioctylsulfos
- Examples of the cationic surfactant include 2-vinylpyridine derivatives and poly-4-vinylpyridine derivatives.
- Amphoteric surfactants include lauryldimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine, polyoctylpolyaminoethylglycine, imidazoline derivatives, etc. Is mentioned.
- Nonionic surfactants include polyoxyethylene nonyl phenyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene dodecyl phenyl ether, polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene alkyl ether, polyoxyallylalkyl.
- Ethers such as alkyl ethers; polyoxyethylene oleic acid, polyoxyethylene oleate, polyoxyethylene distearate, sorbitan laurate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, polyoxyethylene monoole Esters such as ate and polyoxyethylene stearate; 2,4,7,9-tetramethyl-5-decyne-4,7-dio , 3,6-dimethyl-4-octyne-3,6-diol, 3,5-dimethyl-1-hexyne-3 acetylene glycol such as ol (e.g., manufactured by Nissin Chemical Industry Co., Ltd.
- ol e.g., manufactured by Nissin Chemical Industry Co., Ltd.
- the superscript “RTM” means a registered trademark.
- the aqueous black ink composition of the present invention there is no particular limitation on the order of dissolving each agent such as an additive.
- the water used for the preparation of the aqueous black ink composition is preferably water with few impurities such as ion exchange water and distilled water.
- fine filtration may be performed using a membrane filter or the like to remove impurities in the ink composition.
- the pore size of the filter used for microfiltration is usually 1 to 0.1 ⁇ m, preferably 0.8 to 0.1 ⁇ m.
- the water-based black ink composition of the present invention can be used in various fields, but is suitable for water-based inks for writing instruments, water-based printing inks, information recording inks, and the like, and ink-jet inks containing the ink composition It is particularly preferably used as the ink jet recording method of the present invention, which will be described later.
- the inkjet recording method of the present invention is characterized in that recording is performed using the aqueous black ink composition of the present invention as an inkjet ink.
- recording is performed on a recording material using the water-based black ink composition of the present invention, but there are no particular restrictions on the ink nozzles used at that time, and it is appropriately selected according to the purpose.
- Known methods for example, a charge control method that ejects ink using electrostatic attraction, a drop-on-demand method (pressure pulse method) that uses the vibration pressure of a piezo element, and an electric signal as an acoustic beam.
- Inkjet recording methods include a method of ejecting a large number of low-density inks called photo inks in a small volume, a method of improving image quality using a plurality of inks having substantially the same hue and different densities, and colorless and transparent inks. The method using is included.
- the colored body of the present invention is colored with the aqueous black ink composition of the present invention, and more preferably is colored with an inkjet printer using the aqueous black ink composition of the present invention.
- materials that can be colored include information transmission sheets such as paper and film, fibers and cloth (cellulose, nylon, wool, etc.), leather, and base materials for color filters.
- the information transmission sheet is preferably a surface-treated sheet, specifically, a sheet such as paper, synthetic paper, or film provided with an ink receiving layer.
- a porous white inorganic substance capable of absorbing dyes in inks such as porous silica, alumina sol, and special ceramics by impregnating or coating the base material with a cationic polymer, polyvinyl alcohol, It is provided by coating the surface of the substrate together with a hydrophilic polymer such as polyvinylpyrrolidone.
- a hydrophilic polymer such as polyvinylpyrrolidone.
- Typical commercial products include Pictorico (made by Asahi Glass Co., Ltd.), professional photo paper, super photo paper, matte photo paper, glossy gold, platinum grade (all manufactured by Canon Inc.), photo paper (gloss), Photo matte paper, photo paper Chrispier (high gloss) (all made by Seiko Epson Corporation), premium plus photo paper, premium gloss film, photo paper, advanced photo paper (all made by Nippon Hewlett-Packard Co.), Photo-like QP (manufactured by Konica Corporation), painting photo finishing Pro (manufactured by Fuji Film Co., Ltd.), and the like.
- plain paper, high-quality paper, and coated paper can also be used.
- a container containing the above ink composition may be set at a predetermined position of an ink jet printer and recorded on the recording material by an ordinary method.
- the aqueous black ink composition of the present invention a publicly known magenta ink composition, a cyan ink composition, a yellow ink composition, and a green ink composition, blue (or violet) as necessary. Used in combination with an ink composition and a red (or orange) ink composition.
- the ink composition of each color is poured into each container, and the container is used by being loaded into a predetermined position of the ink jet printer in the same manner as the container containing the aqueous black ink composition of the present invention.
- the ink jet printer include a piezo printer using mechanical vibration and a bubble jet (registered trademark) printer using bubbles generated by heating.
- the water-based black ink composition of the present invention is very clear on a recording material such as plain paper and an information transmission sheet having an ink receiving layer, has a high saturation and printing density, and has a black recorded image with an ideal hue. give. Therefore, it is also possible to faithfully reproduce a photographic color image on paper.
- the aqueous black ink composition of the present invention has very good storage stability without solid precipitation, changes in physical properties, hue changes and the like after long-term storage.
- the aqueous black ink composition of the present invention is used for inkjet recording and writing instruments, and even when used as an inkjet ink, solid precipitation due to drying of the ink composition in the vicinity of the nozzle is very unlikely to occur. The head is not blocked.
- the aqueous black ink composition of the present invention uses a continuous ink jet printer and recirculates ink at a relatively long time interval or intermittently uses an on-demand ink jet printer. Does not cause changes in physical properties.
- the image recorded on the information transmission sheet having the ink receiving layer by the aqueous black ink composition of the present invention has various fastness properties such as water resistance, moisture resistance, ozone gas resistance, abrasion resistance, and light resistance. In particular, water resistance and ozone gas resistance are good, and for this reason, the long-term storage stability of photographic images is also excellent.
- the water-based black ink composition of the present invention is extremely useful for various recording ink applications, particularly ink jet recording ink applications.
- the wet cake obtained above was dissolved in 400 parts of water, heated to 70 ° C., and stirred for 1 hour while maintaining the pH value at 10.5 to 11.0 with sodium hydroxide. After cooling to room temperature, the pH was adjusted to 7.0 to 8.0 with 35% hydrochloric acid, sodium chloride was added for salting out, and filtration was performed to obtain a wet cake containing a compound represented by the following formula (19). .
- This diazo suspension was added to a solution obtained by dissolving a wet cake containing a compound represented by the following formula (19) in 400 parts of water at 10 to 25 ° C., and the pH value of the solution was 8.0 with lithium hydroxide.
- the solution was dropped while maintaining at ⁇ 9.0. After completion of dropping, the mixture was stirred at 15 to 30 ° C. for 2 hours at pH 8.0 to 9.0, salted out by adding lithium chloride, and collected by filtration.
- the obtained wet cake was dissolved in 400 parts of water, crystallized by adding 1000 parts of 2-propanol, and collected by filtration.
- the obtained wet cake was dissolved in 300 parts of water, crystallized by adding 900 parts of 2-propanol, filtered, dried, and dried to obtain an azo compound represented by the following formula (21) (No in Table 2). .1 compound) was obtained as a lithium salt.
- the maximum absorption wavelength ( ⁇ max) of this compound in an aqueous solution of pH 9 was 590 nm, and the solubility in water at room temperature was 100 g / L or more.
- Example 2 Except that 14.4 parts of sodium 4-nitroaniline-2-sulfonate in Step 2 of Example 1 was changed to 14.4 parts of sodium 2-nitroaniline-4-sulfonate, 47.0 parts of an azo compound (No. 3 compound in Table 2) represented by the following formula (22) was obtained as a lithium salt.
- the maximum absorption wavelength ( ⁇ max) of this compound in an aqueous solution at pH 9 was 592 nm, and the solubility in water at room temperature was 100 g / L or more.
- Example 3 (Process 1) Dissolve 11.5 parts of sodium 4-nitroaniline-2-sulfonate in 100 parts of water, and add 14.1 parts of 35% hydrochloric acid and 8.6 parts of 40% aqueous sodium nitrite solution at 0-5 ° C. Diazotized. To this diazo suspension was added 100 parts of water, and 12.3 parts of a compound represented by the following formula (23) obtained by the method described in Example 2 of Patent Document 4 was added with sodium hydroxide to a pH of 5.0. The solution dissolved as ⁇ 6.0 was added dropwise while maintaining at 10 to 15 ° C.
- aqueous black ink compositions did not cause precipitation separation during storage and did not change their physical properties even after long-term storage.
- the print density evaluation which is an item to be evaluated using a colorimeter
- the portion with the highest D value is used. It was.
- the reflectance in the near-infrared region was evaluated using a spectrophotometer, the measurement was performed using the gradation portion having the highest D value of the printed matter.
- the reflectance 1 is a reflectance of 700 nm
- the reflectance 2 is a reflectance of 800 nm
- the reflectance 3 is a reflectance of 900 nm. The criteria are shown below.
- the water-based black ink composition of the present invention has a high printing density, a lower reflectance in the near-infrared light region than that of the conventional water-based black ink composition (comparative example), and absorption of near-infrared light. It can be seen that the properties are excellent.
- the water-based black ink composition of the present invention is excellent in print density and sensor compatibility characteristics. Therefore, it is suitably used as a black ink liquid for inkjet recording and writing instruments.
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Abstract
Description
従来、万年筆、フェルトペン等用のインク及びインクジェットプリント用のインクとしては、水溶性色素を水性媒体中に溶解した水性インクが使用されている。これらの水性インクにおいては、ペン先やインク吐出ノズルでのインクの目詰まりを防止すべく、一般に水溶性有機溶剤が添加されている。そして、これらのインクにおいては、十分な濃度の記録画像を与えること、ペン先やノズルの目詰まりを生じないこと、被記録材上での乾燥性がよいこと、滲みが少ないこと、保存安定性に優れること等が要求される。また、使用される水溶性色素には、特に水への溶解度が高いこと、インクに添加される水溶性有機溶剤への溶解度が高いことが要求される。更に、形成される画像には、耐水性、耐光性等の画像堅牢性、色再現性が求められており、また、単に画像堅牢性が高いだけでなくそれぞれの色のバランスが重要となる。
1)
色素成分として、(i)C.I. Acid Black 2を含有する水性黒色インク組成物、
2)
更に、色素成分として、(ii)分子内にアゾ結合(-N=N-)を3つ以上有する染料を含有する上記1)に記載の水性黒色インク組成物、
3)
上記分子内にアゾ結合(-N=N-)を3つ以上有する染料が下記式(1)で表される黒色染料又はその塩である上記2)に記載の水性黒色インク組成物、
4)
上記式(1)中、R1がカルボキシ基又はスルホ基であり、R2が水素原子であり、R6がニトロ基、カルボキシ基、又はスルホ基であり、nが1である上記3)に記載の水性黒色インク組成物、
5)
R1がスルホ基であり、R1の置換位置がアゾ基に対しオルト位の場合、ニトロ基の置換位置がアゾ基に対しパラ位であり、R1の置換位置がアゾ基に対しパラ位の場合、ニトロ基の置換位置がアゾ基に対しオルト位である上記3)又は4)に記載の水性黒色インク組成物、
6)
R3がスルホ基であり、R4が水素原子であり、R5が水素原子、カルボキシ基、又はスルホ基であり、R7が水素原子である上記3)乃至5)のいずれか一項に記載の水性黒色インク組成物、
7)
上記式(1)で表される黒色染料が、下記式(2)で表される黒色染料である上記3)に記載の水性黒色インク組成物、
8)
更に、色素成分として、(iii)C.I. Direct Yellow 86、132、及び142、C.I. Direct Orange 17及び39、C.I. Direct Red 80、84、及び227、C.I. Direct Brown 106及び195、C.I. Acid Orange 95、C.I. Acid Red 249及び254から選択される1又は2以上の染料を含有する上記2)乃至7)のいずれか一項に記載の水性黒色インク組成物、
9)
色素成分の総質量中、前記(i)を20~70質量%、前記(ii)を20~70質量%、前記(iii)を5~50質量%含有する上記8)に記載の水性黒色インク組成物、
10)
更に、水溶性有機溶剤を含有する上記1)乃至9)のいずれか一項に記載の水性黒色インク組成物、
11)
更に、尿素を含有する上記1)乃至10)のいずれか一項に記載の水性黒色インク組成物、
12)
上記1)乃至11)のいずれか一項に記載の水性黒色インク組成物を用いるインクジェット記録方法、
13)
インクジェット記録方法における被記録材が情報伝達用シートである上記12)に記載のインクジェット記録方法、
14)
上記1)乃至11)のいずれか一項に記載の水性黒色インク組成物を含む容器が装填されたインクジェットプリンタ、
15)
上記1)乃至11)のいずれか一項に記載の水性黒色インク組成物で着色された着色体、
に関する。
本発明の水性黒色インク組成物は、色素成分として、(i)C.I. Acid Black 2を含有する。この化合物を含有することによって、従来の黒色インク組成物と比較して、色相及び、特に近赤外光領域でのセンサー対応を、格段に向上することができる。
更に好ましいR1は、カルボキシ基又はスルホ基であり、スルホ基が特に好ましい。R2は水素原子が特に好ましい。
置換位置は、R1の置換位置がアゾ基に対しオルト位の場合、ニトロ基の置換位置がアゾ基に対しパラ位であり、R1の置換位置がアゾ基に対しパラ位の場合、ニトロ基の置換位置がアゾ基に対しオルト位であることが好ましい。
特に好ましいR5は水素原子、カルボキシ基、又はスルホ基であり、特に好ましいR6はニトロ基、カルボキシ基、又はスルホ基であり、特に好ましいR7は水素原子である。また、R5が水素原子、R6がスルホ基、R7が水素原子の組み合わせ、あるいはR5がスルホ基、R6がニトロ基、R7が水素原子の組み合わせが特に好ましく、前者が最も好ましい。
ヒドロキシアルキル基の例としては、ヒドロキシメチル、ヒドロキシエチル、3-ヒドロキシプロピル、2-ヒドロキシプロピル、4-ヒドロキシブチル、3-ヒドロキシブチル、2-ヒドロキシブチル等のヒドロキシ-(C1~C4)アルキル基が挙げられる。
ヒドロキシアルコキシアルキル基の例としては、ヒドロキシエトキシメチル、2-ヒドロキシエトキシエチル、3-ヒドロキシエトキシプロピル、2-ヒドロキシエトキシプロピル、4-ヒドロキシエトキシブチル、3-ヒドロキシエトキシブチル、2-ヒドロキシエトキシブチル等のヒドロキシ(C1~C4)アルコキシ-(C1~C4)アルキル基が挙げられ、これらのうちではヒドロキシエトキシ-(C1~C4)アルキル基が好ましい。
特に好ましいものとしては、水素原子;メチル;ヒドロキシメチル、ヒドロキシエチル、3-ヒドロキシプロピル、2-ヒドロキシプロピル、4-ヒドロキシブチル、3-ヒドロキシブチル、2-ヒドロキシブチル等のヒドロキシ-(C1~C4)アルキル基;ヒドロキシエトキシメチル、2-ヒドロキシエトキシエチル、3-ヒドロキシエトキシプロピル、2-ヒドロキシエトキシプロピル、4-ヒドロキシエトキシブチル、3-ヒドロキシエトキシブチル、2-ヒドロキシエトキシブチル等のヒドロキシエトキシ-(C1~C4)アルキル基が挙げられる。
アニオン界面活性剤としては、アルキルスルホン酸塩、アルキルカルボン酸塩、α-オレフィンスルホン酸塩、ポリオキシエチレンアルキルエーテル酢酸塩、N-アシルアミノ酸及びその塩、N-アシルメチルタウリン塩、アルキル硫酸塩ポリオキシアルキルエーテル硫酸塩、アルキル硫酸塩ポリオキシエチレンアルキルエーテル燐酸塩、ロジン酸石鹸、ヒマシ油硫酸エステル塩、ラウリルアルコール硫酸エステル塩、アルキルフェノール型燐酸エステル、アルキル型燐酸エステル、アルキルアリルスルホン塩酸、ジエチルスルホ琥珀酸塩、ジエチルヘキルシルスルホ琥珀酸、ジオクチルスルホ琥珀酸塩等が挙げられる。
カチオン界面活性剤としては、2-ビニルピリジン誘導体、ポリ4-ビニルピリジン誘導体等が挙げられる。
両性界面活性剤としては、ラウリルジメチルアミノ酢酸ベタイン、2-アルキル-N-カルボキシメチル-N-ヒドロキシエチルイミダゾリニウムベタイン、ヤシ油脂肪酸アミドプロピルジメチルアミノ酢酸ベタイン、ポリオクチルポリアミノエチルグリシン、イミダゾリン誘導体等が挙げられる。
ノニオン界面活性剤としては、ポリオキシエチレンノニルフェニルエーテル、ポリオキシエチレンオクチルフェニルエーテル、ポリオキシエチレンドデシルフェニルエーテル、ポリオキシエチレンオレイルエーテル、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシアリルキルアルキルエーテル等のエーテル系;ポリオキシエチレンオレイン酸、ポリオキシエチレンオレイン酸エステル、ポリオキシエチレンジステアリン酸エステル、ソルビタンラウレート、ソルビタンモノステアレート、ソルビタンモノオレエート、ソルビタンセスキオレート、ポリオキシエチレンモノオレエート、ポリオキシエチレンステアレート等のエステル系;2,4,7,9-テトラメチル-5-デシン-4,7-ジオール、3,6-ジメチル-4-オクチン-3,6-ジオール、3,5-ジメチル-1-ヘキシン-3オール等のアセチレングリコール系(例えば、日信化学社製サーフィノールRTM104、105、82、420、440、465、オルフィンRTMSTG等);等が挙げられる。このうち、サーフィノールRTM420、440、465は好ましく用いられ、サーフィノールRTM440は特に好ましく用いられる。なお、本明細書中において、上付きの「RTM」は登録商標を意味する。
本発明の水性黒色インク組成物は、インクジェット記録用、筆記具用として用いられ、特にインクジェットインクとして使用しても、ノズル付近におけるインク組成物の乾燥による固体析出は非常に起こりにくく、噴射器(記録ヘッド)を閉塞することもない。また、本発明の水性黒色インク組成物は、連続式インクジェットプリンタを用い、比較的長い時間間隔においてインクを再循環させて使用する場合においても、又はオンデマンド式インクジェットプリンタによる断続的な使用においても、物理的性質の変化を起こさない。
更に、本発明の水性黒色インク組成物により、インク受容層を有する情報伝達用シートに記録された画像は、耐水性、耐湿性、耐オゾンガス性、耐擦性、耐光性等の各種堅牢性、特に耐水性、耐オゾンガス性が良好であり、この理由から、写真調の画像の長期保存安定性にも優れている。また、従来のインクと比較して、普通紙上での彩度、明度、及び印字濃度等の発色性、演色性、特に近赤外光領域のセンサー対応特性及び発色性の高さにも優れている。
このように、本発明の水性黒色インク組成物は、各種の記録インク用途、特にインクジェット記録用のインク用途に極めて有用である。
[実施例1]
(工程1)
2-アミノ-5-ナフトール-1,7-ジスルホン酸20.1部とp-トルエンスルホニルクロリド12.6部とをpH8.0~8.5、70℃で1時間反応させた後、酸性にて塩析し、濾過分取することにより、下記式(16)で表される化合物を得た。この式(16)で表される化合物28.4部を水300部中に、炭酸ナトリウムでpH6.0~8.0に調製しながら溶解し、35%塩酸18.7部の添加後、0~5℃とし、40%亜硝酸ナトリウム水溶液10.7部を添加し、ジアゾ化した。
水150部に4-ニトロアニリン-2-スルホン酸ナトリウム14.4部を溶解し、ここに0~5℃で35%塩酸18.8部、40%亜硝酸ナトリウム水溶液10.6部を添加しジアゾ化した。このジアゾ懸濁液を、上記反応にて得られた上記式(17)で表されるモノアゾ化合物を含む溶液に10~20℃、溶液のpH値を炭酸ナトリウムにて8.0~9.0に保持しながら滴下した。滴下終了後、15~30℃で2時間、pH8.0~9.0で撹拌し、塩化ナトリウムの添加により塩析し、濾過分取することで、下記式(18)で表される化合物を含むウェットケーキを得た。
水170部に下記式(20)で表される化合物17.0部を水酸化リチウムの添加によりpH7.0~8.0として溶解し、ここに0~5℃で35%塩酸17.4部、40%亜硝酸ナトリウム水溶液8.7部を添加しジアゾ化した。
実施例1の(工程2)における4-ニトロアニリン-2-スルホン酸ナトリウム14.4部を2-ニトロアニリン-4-スルホン酸ナトリウム14.4部とする以外は実施例1と同様にして、下記式(22)で表されるアゾ化合物(表2におけるNo.3の化合物)47.0部をリチウム塩として得た。この化合物のpH9での水溶液中での最大吸収波長(λmax)は592nmであり、室温における水に対する溶解度は100g/L以上であった。
(工程1)
水100部に4-ニトロアニリン-2-スルホン酸ナトリウム11.5部を溶解し、ここに0~5℃で35%塩酸14.1部、40%亜硝酸ナトリウム水溶液8.6部を添加しジアゾ化した。このジアゾ懸濁液に水100部に、特許文献4の実施例2に記載の方法によって得られた下記式(23)で表される化合物12.3部を水酸化ナトリウムの添加によりpH5.0~6.0として溶解した溶液を、10~15℃に保持しながら滴下した。滴下終了後、炭酸ナトリウムの添加により1時間かけpH6.0~7.0とした後、15~20℃で2時間、pH6.0~7.0で撹拌した。塩化ナトリウムを加えて塩析を行い、濾過分取することで、下記式(24)で表される化合物を含むウェットケーキを得た。
実施例1の(工程3)における上記式(20)で表される化合物17.0部の代わりに上記反応で得られた上記式(24)で表される化合物を含むウェットケーキを用いる以外は実施例1と同様にして、下記式(25)で表されるアゾ化合物(表4におけるNo.16の化合物)50.1部をリチウム塩として得た。この化合物のpH9の水溶液中での最大吸収波長(λmax)は615nmであり、室温における水に対する溶解度は100g/L以上であった。
[実施例4~6]
下記表5に示した組成比で各成分を混合し、固形分が溶解するまでおおよそ1時間撹拌した後、0.45μmのメンブランフィルター(商品名、セルロースアセテート系濾紙、アドバンテック社製)で濾過することにより、試験用の水性黒色インク組成物を調製した。染料としては、下記実施例4~6に記載の組み合わせで調製した。
C.I. Acid Black 2(X=2.5部)
実施例1で合成した化合物(X=2.5部)
合計X=5.0部
C.I. Acid Black 2(X=2.5部)
実施例1で合成した化合物(X=2.0部)
C.I.Direct Orange 39(X=0.5部)
合計X=5.0部
C.I. Acid Black 2(X=2.0部)
実施例1で合成した化合物(X=2.5部)
C.I.Direct Orange 39(X=0.5部)
合計X=5.0部
実施例1で合成した化合物(X=3.0)
C.I.Direct Red 80(X=1.0)
C.I.Direct Orange 39(X=1.0)
合計X=5.0部
C.I.Direct Black 19(X=5.0部)
合計X=5.0部
上記実施例4~6、比較例1、2で得られたそれぞれの水性黒色インク組成物を使用し、インクジェットプリンタ(商品名:Canon社 IP4100)により、上質普通紙(三菱製紙社 DL9084)にインクジェット記録を行った。
印刷の際は、反射濃度が数段階の階調が得られるように画像パターンを作り、ハーフトーンの黒色印字物を得た。印刷時はグレースケールモードを用いているため、黒色記録液以外のイエロー、シアン、マゼンタの各記録液は併用されていない。以下に記す試験方法のうち、測色機を用いて評価する項目である印字濃度評価では、印刷物の印刷濃度(反射濃度D値)を測色する際に、このD値が最も高い部分を用いた。また、分光光度計を用いて近赤外領域の反射率を評価する際も同様に、印刷物のD値が最も高い階調部分を用いて測定を行った。
上記実施例4~6、比較例1、2で得られたそれぞれの水性黒色インク組成物による記録画像につき、印字濃度(DB値)、反射率(%)の2点について評価を行った。その結果を表6に示した。試験方法は下記に示す。
1)印字濃度(DB値)評価
記録画像の印字濃度(DB値)はGRETAG・SPM50(GRETAG社製)を用いて測色し、反射濃度DB値を算出した。以下に判定基準を示す。
○:DB値>1.60
△:1.60≧DB値>1.30
×:DB値≦1.30
2)反射率評価
記録画像の反射率は、紫外可視近赤外分光光度計UV3150(島津製作所株式会社製)を用いて測定し、近赤外光領域の反射率%を算出した。なお、反射率1は700nmの反射率、反射率2は800nmの反射率、反射率3は900nmの反射率を測定したものである。以下に判定基準を示す。
○:反射率≦25%
△:25%<反射率≦50%
×:反射率>50%
Claims (15)
- 色素成分として、(i)C.I. Acid Black 2を含有する水性黒色インク組成物。
- 更に、色素成分として、(ii)分子内にアゾ結合(-N=N-)を3つ以上有する染料を含有する請求項1に記載の水性黒色インク組成物。
- 前記分子内にアゾ結合(-N=N-)を3つ以上有する染料が下記式(1)で表される黒色染料又はその塩である請求項2に記載の水性黒色インク組成物。
- 前記式(1)中、R1がカルボキシ基又はスルホ基であり、R2が水素原子であり、R6がニトロ基、カルボキシ基、又はスルホ基であり、nが1である請求項3に記載の水性黒色インク組成物。
- R1がスルホ基であり、R1の置換位置がアゾ基に対しオルト位の場合、ニトロ基の置換位置がアゾ基に対しパラ位であり、R1の置換位置がアゾ基に対しパラ位の場合、ニトロ基の置換位置がアゾ基に対しオルト位である請求項3又は4に記載の水性黒色インク組成物。
- R3がスルホ基であり、R4が水素原子であり、R5が水素原子、カルボキシ基、又はスルホ基であり、R7が水素原子である請求項3乃至5のいずれか一項に記載の水性黒色インク組成物。
- 更に、色素成分として、(iii)C.I. Direct Yellow 86、132、及び142、C.I. Direct Orange 17及び39、C.I. Direct Red 80、84、及び227、C.I. Direct Brown 106及び195、C.I. Acid Orange 95、C.I. Acid Red 249及び254から選択される1又は2以上の染料を含有する請求項2乃至7のいずれか一項に記載の水性黒色インク組成物。
- 色素成分の総質量中、前記(i)を20~70質量%、前記(ii)を20~70質量%、前記(iii)を5~50質量%含有する請求項8に記載の水性黒色インク組成物。
- 更に、水溶性有機溶剤を含有する請求項1乃至9のいずれか一項に記載の水性黒色インク組成物。
- 更に、尿素を含有する請求項1乃至10のいずれか一項に記載の水性黒色インク組成物。
- 請求項1乃至11のいずれか一項に記載の水性黒色インク組成物を用いるインクジェット記録方法。
- インクジェット記録方法における被記録材が情報伝達用シートである請求項12に記載のインクジェット記録方法。
- 請求項1乃至11のいずれか一項に記載の水性黒色インク組成物を含む容器が装填されたインクジェットプリンタ。
- 請求項1乃至11のいずれか一項に記載の水性黒色インク組成物で着色された着色体。
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US20140299020A1 (en) | 2014-10-09 |
JP5979728B2 (ja) | 2016-08-31 |
EP2754702A4 (en) | 2015-04-22 |
AU2012305513B2 (en) | 2015-12-10 |
EP2754702A1 (en) | 2014-07-16 |
JPWO2013035560A1 (ja) | 2015-03-23 |
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