WO2009110554A1 - アゾ顔料、顔料分散物、着色組成物、及びインクジェット記録用インク - Google Patents
アゾ顔料、顔料分散物、着色組成物、及びインクジェット記録用インク Download PDFInfo
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- WO2009110554A1 WO2009110554A1 PCT/JP2009/054177 JP2009054177W WO2009110554A1 WO 2009110554 A1 WO2009110554 A1 WO 2009110554A1 JP 2009054177 W JP2009054177 W JP 2009054177W WO 2009110554 A1 WO2009110554 A1 WO 2009110554A1
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- 0 Nc1c(*=O)cn[n]1-c1ccccc1 Chemical compound Nc1c(*=O)cn[n]1-c1ccccc1 0.000 description 2
- HSVHDJVAVJMDOX-GJSDQHKISA-N CCc1c(-[n]2ncc(C#N)c2/N=N/c2c(NC)nc(NC)nc2N(CC2)CCN2c2nc(N)nc(NC)c2/N=N/c([n](-c2ncccn2)nc2)c2C#N)nccc1 Chemical compound CCc1c(-[n]2ncc(C#N)c2/N=N/c2c(NC)nc(NC)nc2N(CC2)CCN2c2nc(N)nc(NC)c2/N=N/c([n](-c2ncccn2)nc2)c2C#N)nccc1 HSVHDJVAVJMDOX-GJSDQHKISA-N 0.000 description 1
- CBEQJGAISSEGGW-DNQNZXESSA-N Cc1cc(N2CCOCC2)nc(NC)c1/N=N/c([n](-c1nc(-[n]2ncc(C#N)c2/N=N/c(c(C)c2)c(NC)nc2N2CCOCC2)nc(-[n]2ncc(C#N)c2/N=N/c2c(C)cc(N3CCOCC3)nc2NC)n1)nc1)c1C#N Chemical compound Cc1cc(N2CCOCC2)nc(NC)c1/N=N/c([n](-c1nc(-[n]2ncc(C#N)c2/N=N/c(c(C)c2)c(NC)nc2N2CCOCC2)nc(-[n]2ncc(C#N)c2/N=N/c2c(C)cc(N3CCOCC3)nc2NC)n1)nc1)c1C#N CBEQJGAISSEGGW-DNQNZXESSA-N 0.000 description 1
- JTTIOYHBNXDJOD-UHFFFAOYSA-N Nc1nc(N)nc(N)c1 Chemical compound Nc1nc(N)nc(N)c1 JTTIOYHBNXDJOD-UHFFFAOYSA-N 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
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/0025—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds
- C09B29/0029—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds the heterocyclic ring containing only nitrogen as heteroatom
- C09B29/0037—Monoazo dyes prepared by diazotising and coupling from diazotized amino heterocyclic compounds the heterocyclic ring containing only nitrogen as heteroatom containing a five-membered heterocyclic ring with two nitrogen atoms
-
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
- C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
- C09B29/3604—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom
- C09B29/3617—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom
- C09B29/3621—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom from a pyridine ring
- C09B29/3626—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom from a pyridine ring from a pyridine ring containing one or more hydroxyl groups (or = O)
- C09B29/3634—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom from a pyridine ring from a pyridine ring containing one or more hydroxyl groups (or = O) from diazotized heterocyclic rings
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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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
- C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
- C09B29/3604—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom
- C09B29/3617—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom
- C09B29/3621—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom from a pyridine ring
- C09B29/3639—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic with only one nitrogen as heteroatom from a pyridine ring from a pyridine ring containing one or more amino groups
-
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
- C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
- C09B29/3604—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom
- C09B29/3665—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic ring with two nitrogen atoms
- C09B29/3669—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a six-membered heterocyclic ring with two nitrogen atoms from a pyrimidine ring
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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
- 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
Definitions
- the present invention relates to a novel nitrogen-containing heterocyclic azo pigment, a pigment dispersion containing the azo pigment, a coloring composition, and an ink for inkjet recording.
- a material for forming a color image has been mainly used as an image recording material, and specifically, an ink jet recording material, a thermal transfer recording material, an electrophotographic recording material, a transfer halogen. Silver halide photosensitive materials, printing inks, recording pens, and the like are actively used. Further, a color filter is used for recording and reproducing a color image on an image pickup device such as a CCD in a photographing apparatus and on an LCD or PDP in a display. In these color image recording materials and color filters, three primary colors (dyes and pigments) of the so-called additive color mixing method and subtractive color mixing method are used to display or record full color images. In fact, there is no fast-acting dye that has absorption characteristics that can realize the above-mentioned conditions and can withstand various use conditions and environmental conditions, and improvement is strongly desired.
- the dyes and pigments used in each of the above applications must have the following properties in common. That is, it has preferable absorption characteristics in terms of color reproducibility, fastness under environmental conditions to be used, for example, light resistance, heat resistance, good resistance to oxidizing gases such as ozone, and the like.
- the pigment when the pigment is a pigment, it is substantially insoluble in water and organic solvents and has good chemical fastness, and even when used as particles, the preferred absorption characteristics in the molecular dispersion state are impaired. It is also necessary to have properties such as absence. The required characteristics can be controlled by the strength of intermolecular interaction, but it is difficult to achieve both because they are in a trade-off relationship.
- the pigment in addition to having a particle size and a particle shape necessary for expressing the desired transparency, fastness under the environmental conditions used, such as light resistance, heat resistance, Good resistance to oxidative gases such as ozone, and other chemical fastness to organic solvents and sulfurous acid gas. Disperse even fine particles in the medium used, and stable dispersion. , Etc. are also required.
- pigments that have a good hue, have high coloring power among light, wet heat, and active gases in the environment, and are fast to light.
- the required performance for pigments is more diverse than dyes that require performance as pigment molecules, and not only the performance as pigment molecules, but also the above requirements as solids (fine particle dispersions) as aggregates of pigment molecules All performance needs to be satisfied.
- the group of compounds that can be used as pigments is extremely limited compared to dyes, and even if high-performance dyes are derived into pigments, there are only a few that can satisfy the required performance as fine particle dispersions. It cannot be developed. This is confirmed by the fact that the number of pigments registered in the color index is less than 1/10 of the number of dyes.
- Azo pigments are widely used in printing inks, ink-jet inks, electrophotographic materials and the like because they are excellent in hue and coloring power, which are color characteristics.
- the most typically used azo pigments are yellow diarylide pigments and red naphthol azo pigments.
- diarylide pigments include C.I. I. Pigment Yellow 12, 13 and 17 and the like.
- naphthol azo pigments include C.I. I. Pigment Red 208, 242 and the like.
- these pigments are extremely inferior in fastness, particularly light resistance, and are therefore not suitable for long-term storage of printed matter because the pigment is decomposed and faded when the printed matter is exposed to light.
- an azo pigment having improved fastness by increasing the molecular weight or introducing a group having a strong intermolecular interaction is also disclosed (for example, Patent Document 1). .
- improved pigments are still insufficient, although their light resistance is improved.
- Patent Document 2 discloses a dye having an absorption characteristic excellent in color reproducibility and sufficient fastness. However, since all of the specific compounds described in the patent document are dissolved in water or an organic solvent, the chemical fastness is not sufficient.
- azo dyes since azo dyes often have various visible light absorptions, they have been used as dyes in various fields. For example, it has come to be used in various fields such as coloring of synthetic resins, printing inks, dyes for sublimation thermal transfer materials, inkjet inks, and color filter dyes.
- An absorption spectrum is a large performance required for an azo dye as a dye.
- the hue of the pigment greatly affects the color and texture of an object colored by the pigment, and has a great effect on vision. Therefore, research on the absorption spectrum of dyes has been conducted for a long time.
- Conventionally known azo dyes having a nitrogen-containing 5-membered ring as an azo component are also disclosed in Patent Documents 2 to 5. Japanese Patent Laid-Open No. 11-1000051 JP 2005-213357 A Japanese Patent Laid-Open No. 2003-246942 JP 2002-371214 A JP 2002-371079 A
- An object of the present invention is to provide an azo pigment, an azo pigment dispersion, a colored composition, and an inkjet recording excellent in color characteristics such as coloring power and hue, and also in durability such as light resistance and ozone resistance. That is.
- An azo pigment represented by the following general formula (1), a tautomer thereof, a salt or a hydrate thereof.
- G represents an aliphatic group, an aryl group, or a heterocyclic group
- Y represents a hydrogen atom or an aliphatic group
- R 1 represents an aliphatic group, an aliphatic amino group, or an arylamino group.
- R 2 and R 3 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, Represents a sulfonamide group, an amino group, or a heterocyclic group
- X 1 represents a nitrogen atom or C—Z
- Z represents an electron-withdrawing group having a Hammett ⁇ p value of 0.2 or more
- X 2 represents a nitrogen atom or C-R represents a 5 .
- R 1 , R 2, R 3, Y , Z also R 1
- R 1 , R 2, R 3, Y , Z also R 1
- R 6 represents a hydrogen atom, an aliphatic group
- aryl R 21 and R 22 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group.
- a pigment dispersion comprising at least one of the azo pigment according to [1] or [2], a tautomer thereof, a salt or a hydrate thereof.
- a coloring composition comprising at least one of the azo pigment according to [1] or [2], a tautomer thereof, a salt or a hydrate thereof.
- Y represents a hydrogen atom or an aliphatic group.
- R 1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, Group, a sulfonamide group, an amino group or a heterocyclic group
- R 21 and R 22 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group.
- Z 1 is an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group
- Z 1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group,
- R 1 , R 21 , R 22 represents a trimer through R 6 , Y, Z 1 , Z 2 , G 0 or G 1.
- R 1 , R 21 , R 22 , R 6 , Y, Z 1 Represents a tetramer through Z 2 , G 0 or G 1 )
- the azo pigment of the present invention is excellent in color characteristics such as high coloring power and hue, and also in durability such as light resistance and ozone resistance. Furthermore, the pigment dispersion of the present invention is obtained by dispersing the azo pigment of the present invention in various media, and is excellent in color characteristics, durability, and dispersion stability.
- FIG. 3 is an infrared absorption spectrum diagram of specific compound example D-1 synthesized according to synthesis example 1.
- FIG. 4 is an infrared absorption spectrum diagram of specific compound example D-3 synthesized according to synthesis example 2.
- FIG. 11 is an infrared absorption spectrum diagram of specific compound example D-5 synthesized according to synthesis example 3.
- FIG. 11 is an infrared absorption spectrum diagram of specific compound example D-7 synthesized according to synthesis example 4.
- FIG. 11 is an infrared absorption spectrum diagram of specific compound example D-9 synthesized according to synthesis example 5.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-38.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-40.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-42.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-44.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-65.
- FIG. 46 is an infrared absorption spectrum of a specific compound example D-68.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-69.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-72.
- FIG. 45 is an infrared absorption spectrum of a specific compound example D-74.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-75.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-76.
- FIG. 46 is an infrared absorption spectrum of a specific compound example D-79.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-83.
- FIG. 45 is an infrared absorption spectrum of a specific compound example D-84.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-85.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-87.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-90.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-92.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-100.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-101.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-103.
- FIG. 11 is an infrared absorption spectrum of a specific compound example D-77.
- the aliphatic group in the present invention may be linear, branched or cyclic. Moreover, it may be saturated or unsaturated. Specific examples include an alkyl group, an alkenyl group, a cycloalkyl group, and a cycloalkenyl group. Furthermore, the aliphatic group may be unsubstituted or may have a substituent.
- the aryl group may be a single ring or a condensed ring. Further, it may be unsubstituted or may have a substituent. Moreover, the heterocyclic group should just have a hetero atom (for example, a nitrogen atom, a sulfur atom, an oxygen atom) in the ring, and even if it is a saturated ring, it is an unsaturated ring. Also good. Further, it may be a single ring or a condensed ring, and may be unsubstituted or have a substituent.
- a hetero atom for example, a nitrogen atom, a sulfur atom, an oxygen atom
- the substituent in the present invention may be any group that can be substituted.
- the azo pigment of the present invention contains an ionic hydrophilic group as a substituent, it is preferably a salt with a polyvalent metal cation (for example, magnesium ion, calcium ion, barium ion), and is a lake pigment. Is particularly preferred.
- a polyvalent metal cation for example, magnesium ion, calcium ion, barium ion
- Hammett's substituent constant ⁇ p value used in the present specification will be described briefly.
- Hammett's rule is a method described in 1935 in order to quantitatively discuss the effect of substituents on the reaction or equilibrium of benzene derivatives.
- Substituent constants determined by Hammett's rule include a ⁇ p value and a ⁇ m value, and these values can be found in many general books.
- each substituent is limited or explained by Hammett's substituent constant ⁇ p, but this means that it is limited to only a substituent having a value known in the literature, which can be found in the above-mentioned book. Needless to say, even if the value is unknown, it includes a substituent that would be included in the range when measured based on Hammett's rule.
- the compound represented by the general formula (1) or (2) of the present invention is not a benzene derivative, the ⁇ p value is used as a scale indicating the electronic effect of the substituent regardless of the substitution position. In the present invention, the ⁇ p value will be used in this sense.
- a pigment is a state in which molecules are firmly bonded to each other by cohesive energy due to strong interaction between dye molecules. In order to create this state, it is described in, for example, Journal of Imaging Society of Japan, Vol. 43, page 10 (2004) that van der Waals force between molecules and hydrogen bonding between molecules are necessary. In order to increase the van der Waals force between molecules, introduction of an aromatic group, a polar group and / or a hetero atom into the molecule can be considered. Moreover, in order to form an intermolecular hydrogen bond, introduction
- the pigment molecule preferably contains an amide bond, a sulfonamide bond, an ether bond, a sulfone group, an oxycarbonyl group, an imide group, a carbamoylamino group, a hetero ring, a benzene ring and the like.
- the azo pigment of the present invention is represented by the following general formula (1).
- the compound represented by the general formula (1) can easily form an intermolecular interaction of dye molecules due to its specific structure, has low solubility in water or an organic solvent, and can be an azo pigment. Unlike a dye that dissolves in water or an organic solvent in a molecular dispersion state, the pigment is finely dispersed in the solvent as solid particles such as a molecular assembly.
- a specific structure represented by the following general formula (1) it exhibits excellent characteristics in color characteristics such as coloring power and hue, and is excellent in durability such as light resistance and ozone resistance. Characteristics can be shown.
- the pigment represented by the general formula (1) will be described.
- G represents an aliphatic group, an aryl group, or a heterocyclic group
- Y represents a hydrogen atom or an aliphatic group
- R 1 represents an aliphatic group, an aliphatic amino group, or an arylamino group.
- R 2 and R 3 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an amino group, X 1 represents a nitrogen atom or C—Z, Z represents an electron withdrawing group having a Hammett ⁇ p value of 0.2 or more, and X 2 represents a nitrogen atom.
- the aliphatic group represented by G may have a substituent, may be saturated or unsaturated, and the group that may be substituted is described in the above-mentioned substituent group. Any group can be used as long as it can be substituted.
- the aliphatic group represented by G is preferably an aliphatic group having 1 to 8 carbon atoms in total, more preferably an alkyl group having 1 to 4 carbon atoms in total, such as methyl, ethyl, vinyl, cyclohexyl. , Carbamoylmethyl and the like.
- the aryl group represented by G may be condensed or may have a substituent.
- the group which may be substituted is a group described in the above-mentioned substituent group. Any group is possible.
- the aryl group represented by G is preferably an aryl group having 6 to 12 carbon atoms, more preferably an aryl group having 6 to 10 carbon atoms in total, such as phenyl, 4-nitrophenyl, 4-acetylamino. Phenyl, 4-methanesulfonylphenyl and the like.
- the heterocyclic group represented by G may have a substituent, may be saturated or unsaturated, may be condensed, and preferably has a total number of carbon atoms of 2 to A heterocyclic group bonded by 12 carbon atoms, more preferably an unsaturated 5- to 6-membered heterocyclic ring having 2 to 10 total carbon atoms bonded by a carbon atom, and more preferably a total ring bonded by carbon atoms
- any group can be used as long as it can be substituted with the groups described in the above-mentioned substituent group.
- an aliphatic group, an aryl group, a hydroxy group is used.
- the aliphatic group represented by Y may have a substituent, may be saturated or unsaturated, and the group that may be substituted with the aliphatic group of Y is as described above. Any group can be used as long as it is a group that can be substituted with the groups described in the section of the substituent.
- the aliphatic group represented by Y is preferably an alkyl group having 1 to 8 carbon atoms in total, more preferably an alkyl group having 1 to 6 carbon atoms in total, such as methyl, ethyl, vinyl, cyclohexyl, (T) -butyl, carbamoylmethyl and the like.
- the aliphatic group represented by R 1 may have a substituent, may be saturated or unsaturated, and the group that may be substituted includes the above-mentioned substituent group. Any group can be used as long as it is a substitutable group.
- the aliphatic group for R 1 is preferably an alkyl group having 1 to 8 carbon atoms in total, more preferably an alkyl group having 1 to 6 carbon atoms in total, such as methyl, ethyl, i-propyl, cyclohexyl, Examples include t-butyl.
- the aliphatic amino group represented by R 1 , R 2 and R 3 may have a substituent, may be saturated or unsaturated, and may be substituted.
- the aliphatic amino group for R 1 and R 2 is preferably an aliphatic amino group having 1 to 8 carbon atoms in total, more preferably an alkylamino group having 1 to 4 carbon atoms in total, such as methylamino, Examples include ethylamino, dimethylamino, diethylamino, methoxyethylamino and the like.
- the aliphatic amino group represented by R 3 is preferably an aliphatic amino group having 1 to 8 carbon atoms in which hydrogen atoms are bonded to the amino group, more preferably a hydrogen atom bonded to the amino group.
- An alkylamino group having 1 to 4 carbon atoms in total for example, methylamino, ethylamino, methoxyethylamino, acetylaminoethylamino and the like.
- the arylamino group represented by R 1 , R 2 and R 3 may have a substituent, and the group which may be substituted is a group described in the above-mentioned substituent group, Any group is possible.
- the aryl group preferably has a substituent at the meta position and / or para position, and more preferably has a substituent only at the para position.
- the arylamino group for R 1 , R 2 and R 3 is preferably an arylamino group having 6 to 16 carbon atoms in total, more preferably an arylamino group having 6 to 8 carbon atoms in total, such as anilino, 4-acetylaminoanilino, N-methyl-3-methoxyanilino, 3-carbamoylanilino, 3-carbamoylaminoanilino and the like can be mentioned.
- the heterocyclic amino group represented by R 1 , R 2 and R 3 may have a substituent, may be saturated or unsaturated, and may be substituted.
- the heterocyclic amino group for R 1 , R 2 and R 3 is preferably a heterocyclic amino group having 2 to 16 carbon atoms in total, more preferably a 5- to 6-membered heterocyclic group having 2 to 12 carbon atoms in total.
- a cyclic amino group such as 2-pyridylamino, 2-pyrimidylamino, 2-pyrrolidinylamino and the like;
- the acylamino group represented by R 1 , R 2 and R 3 may have a substituent, and may be aliphatic, aromatic, heterocyclic, or substituted.
- any group may be used as long as it is a group which can be substituted with the groups described in the above-mentioned substituent group.
- the acylamino group for R 1 , R 2 and R 3 is preferably an acylamino group having 1 to 12 carbon atoms in total, more preferably an acylamino group having 1 to 8 carbon atoms in total, and further preferably a total carbon atom
- Examples of the alkylcarbonylamino group of 1 to 8 include acetylamino, benzoylamino, 2-pyridinecarbonylamino, propanoylamino and the like.
- the sulfonamide group represented by R 1 , R 2 and R 3 may have a substituent, and may be aliphatic, aromatic, or heterocyclic, As the group which may be substituted, any group may be used as long as it is a group which can be substituted with the groups described in the above-mentioned substituent group.
- the sulfonamide group of R 1 , R 2 and R 3 is preferably a sulfonamide group having 1 to 12 carbon atoms, more preferably a sulfonamide group having 1 to 8 carbon atoms, and still more preferably Examples of the alkylsulfonamide group having 1 to 8 carbon atoms in total include methanesulfonamide, benzenesulfonamide, 2-pyridinesulfonamide and the like.
- the heterocyclic group represented by R 1 , R 2 and R 3 may have a substituent, may be saturated or unsaturated, may be condensed, and may be substituted.
- any group can be used as long as it is a group described in the above-mentioned substituent group and capable of substitution.
- the heterocyclic group for R 1 , R 2 and R 3 is preferably a heterocyclic group bonded by a primary atom having 2 to 16 carbon atoms, more preferably a 5 to 6 member having 2 to 12 carbon atoms.
- Heterocyclic groups linked by a ring nitrogen atom such as 1-pyrrolidinyl, 4-morpholinyl, 1-piperidinyl, 1-pyrrolyl 1-imidazolyl, 1-benzoimidazolyl and the like.
- Z is an electron-withdrawing group having a Hammett's substituent constant ⁇ p value of 0.2 or more, and is preferably an electron-withdrawing group having a ⁇ p value of 0.30 or more.
- the upper limit is preferably an electron withdrawing group of 1.0 or less.
- Z which is an electron withdrawing group having a ⁇ p value of 0.2 or more, include an acyl group, an acyloxy group, a carbamoyl group, an aliphatic oxycarbonyl group, an aryloxycarbonyl group, a cyano group, a nitro group, and a dialkylphospho Group, diarylphosphono group, diarylphosphinyl group, alkylsulfinyl group, arylsulfinyl group, alkylsulfonyl group, arylsulfonyl group, sulfonyloxy group, acylthio group, sulfamoyl group, thiocyanate group, thiocarbonyl group, alkyl halide Groups, halogenated alkoxy groups, halogenated aryloxy groups, halogenated alkylamino groups, halogenated alkylthio groups, aryl groups substituted with other electron-with
- Z preferably represents a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group, a carboxyl group or a sulfonyl group.
- the carbamoyl group represented by Z may have a substituent, and the group which may be substituted may be any group as long as it can be substituted with the groups described in the above-mentioned substituents section. .
- the carbamoyl group of Z is preferably a carbamoyl group having 1 to 12 carbon atoms, more preferably a carbamoyl group having 1 to 7 carbon atoms, and still more preferably an unsubstituted group having 1 to 5 carbon atoms.
- an alkyl-substituted carbamoyl group most preferably an unsubstituted carbamoyl group, and examples thereof include unsubstituted carbamoyl, N-methylcarbamoyl, N, N-dimethylcarbamoyl, and N-ethylcarbamoyl.
- the aliphatic oxycarbonyl group represented by Z may have a substituent, and the group that may be substituted may be a group that can be substituted with the groups described in the above-mentioned substituents section. Anything is fine.
- the aliphatic oxycarbonyl group represented by Z is preferably an aliphatic oxycarbonyl group having 2 to 12 carbon atoms in total, more preferably an alkoxycarbonyl group having 2 to 8 carbon atoms in total. And methoxycarbonyl, ethoxycarbonyl, carbamoylmethoxycarbonyl and the like.
- the sulfonyl group represented by Z may have a substituent, may be aliphatic, aromatic, or heterocyclic, and examples of the substituent include the aforementioned substituents. Any group can be used as long as it is a group that can be substituted.
- the sulfonyl group represented by Z is preferably an alkylsulfonyl group having 2 to 12 carbon atoms in total, more preferably an alkylsulfonyl group having 2 to 8 carbon atoms in total, such as methanesulfonyl or ethanesulfonyl. , Benzenesulfonyl and the like.
- the carbamoyl group represented by R 5 may have a substituent, and as the group that may be substituted, any group can be used as long as it is a group that can be substituted with the groups described in the above-mentioned substituent group. good.
- the carbamoyl group for R 5 is preferably a carbamoyl group having 1 to 7 carbon atoms, more preferably an unsubstituted or alkyl-substituted carbamoyl group having 1 to 5 carbon atoms, and still more preferably an unsubstituted carbamoyl group.
- the aliphatic oxycarbonyl group represented by R 5 may have a substituent, and the group that may be substituted is a group that can be substituted with the group described in the above-mentioned substituent group, or a group that can be substituted. Anything is fine.
- the aliphatic oxycarbonyl group represented by R 5 is preferably an aliphatic oxycarbonyl group having 2 to 8 carbon atoms in total, more preferably an alkoxycarbonyl group having 2 to 6 carbon atoms in total, for example, , Methoxycarbonyl, ethoxycarbonyl, carbamoylmethoxycarbonyl and the like.
- G in the general formula (1) is preferably an aliphatic group or a heterocyclic group, and more preferably a heterocyclic group.
- Y in the general formula (1) is preferably a hydrogen atom.
- R 1 in the general formula (1) is preferably an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an amino group, or a heterocyclic group, and an aliphatic group
- An aliphatic amino group, an arylamino group, an amino group, and a heterocyclic ring are more preferable, and an alkyl group, an alkylamino group, and a saturated heterocyclic group bonded with a nitrogen atom are most preferable.
- R 2 in the general formula (1) is preferably an aliphatic amino group, an arylamino group, an acylamino group, an amino group or a heterocyclic group, and is preferably an alkylamino group or an arylamino group. More preferably, it is an acylamino group, an amino group or a heterocyclic group, more preferably an alkylamino group, an arylamino group, an acylamino group, an amino group or a saturated heterocyclic group bonded by a nitrogen atom, an alkylamino group Most preferably, it is an arylamino group or a saturated heterocyclic group bonded with a nitrogen atom.
- R 3 in the general formula (1) is preferably an aliphatic amino group, an arylamino group, an acylamino group or an amino group, an alkylamino group in which a hydrogen atom is bonded to the nitrogen atom, and a hydrogen atom to the nitrogen atom Is more preferably an arylamino group or an amino group bonded to each other, more preferably an alkylamino group in which a hydrogen atom is bonded to the nitrogen atom or an arylamino group in which a hydrogen atom is bonded to the nitrogen atom.
- an alkylamino group in which a hydrogen atom is bonded to an atom a monoalkylamino group, where the alkyl may have a substituent).
- X 1 in the general formula (1) is preferably CZ, more preferably Z is a cyano group, a carbamoyl group or an aliphatic oxycarbonyl group. More preferably, it is a group oxycarbonyl group, and most preferred is a cyano group.
- X 2 in the general formula (1) is preferably a nitrogen atom or C—R 5 , where R 5 is a hydrogen atom, a cyano group or a carbamoyl group, and X 2 is a nitrogen atom.
- R 5 is a hydrogen atom or a cyano group
- X 2 is C—R 5 and R 5 is a hydrogen atom or a cyano group.
- X 2 is C—R 5 and R 5 is a cyano group.
- n represents an integer of 1 to 4, preferably n is 1, 2 or 3, more preferably 1 or 2.
- G is an aliphatic group or a heterocyclic group
- Y is a hydrogen atom or an aliphatic group
- R 1 is an aliphatic group.
- X 2 is a nitrogen atom or C—R 5
- R 5 is a hydrogen atom or a cyano group
- the azo pigment represented by the general formula (1) is preferably an azo pigment represented by the following general formula (2) and general formula (2-1).
- Y, R 1 , n and X 2 are the same as those defined in General Formula (1).
- R 6 is a hydrogen atom, an aliphatic group
- R 21 and R 22 are the same as defined for R 2 in the general formula (1)
- G 1 represents a 5- to 6-membered ring together with a carbon atom and a nitrogen atom
- the hetero ring may be an aromatic ring or a condensed ring
- G 0 represents an aliphatic group
- Z 1 and Z 2 are electron-withdrawing groups having Hammett's ⁇ p value of 0.2 or more.
- Y 21 represents a hydrogen atom or a methyl group.
- the aliphatic group represented by R 6 may have a substituent, may be saturated or unsaturated, and the group that may be substituted includes the above-mentioned substituent group. Any group can be used as long as it is a substitutable group.
- the aliphatic group for R 6 is preferably an aliphatic group having 1 to 8 carbon atoms in total, more preferably an alkyl group having 1 to 4 carbon atoms in total, and most preferably a methyl group such as methyl , Ethyl, propyl, isobutyl, methoxyethyl, acetylaminoethyl and the like.
- the aryl group represented by R 6 may have a substituent, and as the group that may be substituted, any group can be used as long as it is a group that can be substituted with the groups described in the above-mentioned substituents section. good.
- the aryl group for R 6 is preferably an aryl group having 6 to 16 carbon atoms, more preferably an aryl group having 6 to 8 carbon atoms, such as phenyl, 4-acetylaminophenyl, 3-carbamoyl. And phenyl, 3-carbamoylaminophenyl, 3,4-benzimidazolone, and the like.
- the heterocyclic group represented by R 6 may have a substituent, may be saturated or unsaturated, and the group which may be substituted includes the above-mentioned substituent group. Any group can be used as long as it is a substitutable group.
- the heterocyclic group for R 1 , R 2 and R 3 is preferably a heterocyclic group having 2 to 16 carbon atoms in total, more preferably a 5 to 6-membered heterocyclic group having 2 to 12 carbon atoms in total. Examples thereof include 2-pyridyl, 2-pyrimidyl, 4-pyrimidyl and the like.
- the aliphatic group represented by G 0 is the same as the aliphatic group described for G in the general formula (1), and preferred substituents and ranges are also the same.
- the 5- to 6-membered heterocycle formed together with the carbon atom and nitrogen atom represented by G 1 may have a substituent, and may be a saturated ring or an unsaturated ring, or an aromatic ring. Or a condensed ring, preferably a heterocyclic group bonded with 2 to 12 carbon atoms in total, more preferably an unsaturated 5 to 6 membered heterocycle with 2 to 10 carbon atoms in total.
- a ring such as 2-thiazolyl, 2-benzothiazolyl, 2-oxazolyl, 2-benzoxazolyl, 2-pyridyl, 2-pyrazinyl, 3-pyridazinyl, 2-pyrimidinyl, 4-pyrimidinyl, 2-imidazolyl, 2 -Benzimidazolyl, 2-triazinyl and the like, and these heterocyclic groups may have a tautomer structure together with a substituent.
- the electron-withdrawing group having a Hammett ⁇ p value represented by Z 1 and Z 2 of 0.2 or more is the same as that described for Z in the general formula (1), and the same preferable substituents and ranges. It is.
- Y 21 is preferably a hydrogen atom.
- R 6 in the general formula (2) is preferably a hydrogen atom, an aliphatic group and an aryl group, more preferably a hydrogen atom, an alkyl group and an aryl group, and an alkyl group. And an aryl group are more preferable, an alkyl group is particularly preferable, and a methyl group is most preferable.
- R 6 in the general formula (2-1) is preferably a hydrogen atom, an aliphatic group, and an aryl group, more preferably a hydrogen atom, an alkyl group, and an aryl group, A hydrogen atom and an alkyl group are more preferable, an alkyl group is particularly preferable, and a methyl group is most preferable.
- the 5- to 6-membered heterocycle formed together with the carbon atom and nitrogen atom represented by G 1 is preferably any of the following (G-1) to (G-13). Any of (G-1) to (G-6) is more preferred, and the following (G-1), (G-4), or (G-6) is more preferred.
- * In the general formulas (G-1) to (G-13) represents a bonding site with the N atom of the pyrazole ring.
- Y 1 to Y 11 each represents a hydrogen atom or a substituent.
- G 11 in (G-13) represents a group of nonmetallic atoms that can form a 5- to 6-membered heterocycle, and the heterocycle represented by G 11 has a substituent even if it is unsubstituted.
- the heterocycle may be monocyclic or condensed.
- Formulas (G-1) to (G-13) may have tautomeric structures together with substituents.
- the pigment of the present invention preferably has “total carbon number / number of azo groups” of 40 or less, and in the case of 30 or less, More preferred. From the viewpoint of the effect of the present invention, particularly from the viewpoint of dispersibility and dispersion stability, the pigment of the present invention preferably has a “molecular weight / number of azo groups” of 600 or less. From the viewpoint of the effect of the present invention, particularly from the viewpoint of dispersibility and dispersion stability, the pigment of the present invention is preferably not substituted with an ionic substituent such as a sulfo group or a carboxyl group.
- the hue is preferably red to purple and excellent in light fastness.
- R 1 , R 3 , and R 22 are an amino group, an alkylamino group, and an acylamino group
- G 0 is an alkyl group
- Z 2 is In the case of an aliphatic oxycarbonyl group, the hue is yellow to red, which is preferable because of excellent light fastness.
- the pigment represented by the general formula (2) is a saturated heterocyclic group in which R 1 is bonded with an alkyl group, an alkylamino group, an arylamino group, an amino group, or a nitrogen atom.
- R 21 is an alkylamino group, an arylamino group, an amino group or a saturated heterocyclic group bonded by a nitrogen atom
- Z 1 is an aliphatic oxycarbonyl group, a cyano group or a carbamoyl group
- X 2 is nitrogen An atom or C—R 5 , wherein R 5 is a hydrogen atom or a cyano group
- R 6 is an alkyl group or an aryl group, and forms a 5- or 6-membered member together with the carbon atom and nitrogen atom represented by G 1
- the heterocyclic ring is preferably any one of (G-1) to (G-13), wherein Y 21 is a hydrogen atom or a methyl group, and n is 1 or 2.
- the pigment represented by the general formula (2) is a saturated heterocyclic group in which R 1 is an alkyl group, and R 21 is an alkylamino group, an arylamino group, or a nitrogen atom.
- Z 1 is an aliphatic oxycarbonyl group or a cyano group
- X 2 is C—R 5
- R 5 is a hydrogen atom or a cyano group
- R 6 is an alkyl group or an aryl group Any one of (G-1) to (G-6) as a 5- to 6-membered heterocycle formed together with the carbon atom and nitrogen atom represented by G 1 , wherein Y 21 is a hydrogen atom or a methyl group; More preferably, n is 1 or 2.
- the pigment represented by the general formula (2) is a saturated heterocyclic group in which R 1 is an alkyl group, and R 21 is an alkylamino group, an arylamino group, or a nitrogen atom.
- Z 1 is an aliphatic oxycarbonyl group or a cyano group
- X 2 is C—R 5
- R 5 is a hydrogen atom or a cyano group
- R 6 is an alkyl group or an aryl group
- a 5- to 6-membered heterocycle formed together with the carbon atom and nitrogen atom represented by G 1 is (G-1), (G-4), or (G-6), wherein Y 21 is a hydrogen atom Or it is a methyl group, Comprising: The case where n is 1 or 2 is still more preferable.
- the pigment represented by the general formula (2) is a saturated heterocyclic group in which R 1 is an alkyl group, and R 21 is an alkylamino group, an arylamino group, or a nitrogen atom.
- Z 1 is an aliphatic oxycarbonyl group or cyano group
- X 2 is C—R 5
- R 5 is a hydrogen atom
- R 6 is an alkyl group
- a 5- to 6-membered heterocycle formed together with the carbon atom and nitrogen atom represented by G 1 is (G-1), (G-4), or (G-6), wherein Y 21 is a hydrogen atom; , N is more preferably 1.
- the pigment represented by the general formula (2) is such that R 1 is an alkyl group, R 21 is an arylamino group, and Z 1 is an aliphatic oxycarbonyl group or a cyano group.
- X 2 is C—R 5
- R 5 is a cyano group
- R 6 is an alkyl group, and forms a 5- to 6-membered hetero atom together with the carbon atom and nitrogen atom represented by G 1
- the ring is most preferably (G-4)
- Y 21 is a hydrogen atom
- n is 1.
- the pigment represented by the general formula (2-1) is a saturated compound in which Y is a hydrogen atom and R 1 is bonded with an alkylamino group, an arylamino group, an amino group, or a nitrogen atom.
- a heterocyclic group wherein R 22 is an alkylamino group, an arylamino group, an amino group, or a saturated heterocyclic group bonded with a nitrogen atom, and Z 2 may be an aliphatic oxycarbonyl group or substituted A carbamoyl group, wherein X 2 is a nitrogen atom or C—R 5 , R 5 is a hydrogen atom or a cyano group, R 6 is an alkyl group or an aryl group, and n is 1 or 2 Some cases are preferred.
- the pigment represented by the general formula (2-1) is such that Y is a hydrogen atom, R 1 is an alkylamino group, an arylamino group, or an amino group, and R 22 is An alkylamino group, an arylamino group, an amino group, an acylamino group, wherein Z 2 is an aliphatic oxycarbonyl group or an optionally substituted carbamoyl group, X 2 is a nitrogen atom, and R 6 is More preferably, it is an alkyl group or an aryl group, and n is 1 or 2.
- the pigment represented by the general formula (2-1) is such that Y is a hydrogen atom, R 1 is an alkylamino group, an amino group, and R 22 is an alkylamino group, An amino group, an acylamino group, Z 2 is an aliphatic oxycarbonyl group or an optionally substituted carbamoyl group, X 2 is a nitrogen atom, R 6 is an alkyl group, and n is The case of 1 or 2 is more preferable.
- the pigment represented by the general formula (2-1) is such that Y is a hydrogen atom, R 1 is an alkylamino group, an amino group, and R 22 is an alkylamino group, Most preferred is an amino group, an acylamino group, Z 2 is an aliphatic oxycarbonyl group, X 2 is a nitrogen atom, R 6 is an alkyl group, and n is 1 or 2. .
- the azo pigment represented by the general formula (1) and the general formula (2) is preferably an azo pigment represented by the following general formula (3).
- R 1 , R 21 , Z 1 , R 5 , R 6 , Y 21 and n are the same as those defined in General Formula (1) and General Formula (2).
- G 4 Represents any one of (G-1) to (G-6) in the general formula (2).
- R 1 , R 2 , Z 1 , R 5 , R 6 , Y 21 and n of the pigment represented by the general formula (3) are the same as those in the general formula (2).
- a preferable range of G 4 is the same as that in G 1 of the general formula (2).
- the pigment represented by the general formula (3) is a saturated heterocyclic group in which R 1 is an alkyl group, and R 21 is an alkylamino group, an arylamino group, or a nitrogen atom.
- Z 1 is an aliphatic oxycarbonyl group or a cyano group
- R 5 is a hydrogen atom, a cyano group
- R 6 is an alkyl group, an aryl group, and the carbon atom represented by G 4 ;
- the 5- to 6-membered heterocycle formed together with the nitrogen atom is (G-1), (G-4), or (G-6), wherein Y 21 is a hydrogen atom or a methyl group, and n is 1 or preferably represents 2, comprising R 1 is an alkyl group, R 21 is an alkylamino group, an arylamino group saturated heterocyclic group bonded to at or nitrogen atom, Z 1 is an aliphatic oxycarbonyl group, or a cyano group, R 5 is hydrogen Hara , A cyano group, R 6 is an alkyl group, the carbon atom to which G 4 represents, as 5-6 membered heterocyclic ring formed together with the nitrogen atom, (G-1), ( G-4), or (
- the azo pigment represented by the general formula (1) and the general formula (2-1) is preferably an azo pigment represented by the following general formula (4).
- the pigment represented by the general formula (4) is a saturated heterocyclic ring in which Y is a hydrogen atom and R 1 is bonded to an alkylamino group, an arylamino group, an amino group, or a nitrogen atom.
- R 22 is an alkylamino group, an arylamino group, an amino group, or a saturated heterocyclic group bonded with a nitrogen atom
- Z 2 is an aliphatic oxycarbonyl group or an optionally substituted carbamoyl group
- R 6 is an alkyl group or an aryl group, and n is preferably 1 or 2
- Y is a hydrogen atom
- R 1 is an alkylamino group, arylamino group, amino group
- R 22 is an alkylamino group, arylamino group, amino group, acylamino group
- Z 2 is aliphatic More preferably, it is an oxycarbonyl group or an optionally substituted carbamoyl group
- R 6 is an alkyl group or an aryl group, and n is 1 or 2
- Y is a hydrogen atom
- R 1 is an alkylamino group, an amino group
- R 22 is an alkylamino group, an amino group
- the present invention includes within its scope tautomers of the azo pigments represented by the general formulas (1) to (4) and (2-1).
- the general formulas (1) to (4) and (2-1) are shown in the form of extreme structural formulas of several tautomers that can be taken in terms of chemical structure, but tautomers other than the described structures May be used, or may be used as a mixture containing a plurality of tautomers.
- the pigment represented by the general formula (1) may be an azo-hydrazone tautomer represented by the following general formula (1 ′).
- the present invention includes in its scope a compound represented by the following general formula (1 ′), which is a tautomer of the azo pigment represented by the general formula (1).
- R 3 ′ is a group corresponding to R 3 defined in the general formula (1).
- the pigment represented by the general formula (1) is preferably an azo pigment represented by the following general formula (5-1), (5-2) or (5-3).
- G, Y, Z, R 1 , R 2 , R 5 , R 6 , and n represent the general formula (1) and the general formula
- G 3 represents a non-metallic atomic group necessary for forming a 6-membered ring together with a carbon atom and a nitrogen atom, and the heterocycle is a condensed ring even if it is an aromatic ring.
- Z 3 represents a group obtained by removing carbonyl from a group corresponding to Z in the general formula (1).
- the azo pigment represented by the general formula (1) preferably has a substituent that forms an intramolecular hydrogen bond or an intramolecular cross-hydrogen bond. It is more preferable to have at least one substituent that forms an intramolecular hydrogen bond, and it is particularly preferable to have at least one substituent that forms an intramolecular cross-hydrogen bond.
- examples of particularly preferable azo pigments as described above include the general formulas (5-1) and (5-1). Examples thereof include azo pigments represented by 5-2) or (5-3).
- Factors in which this structure is preferable include a nitrogen atom, a hydrogen atom, and a heteroatom constituting the heterocycle contained in the azo pigment structure as represented by the general formula (5-1), (5-2), or (5-3) (The oxygen atom of the carbonyl group or the nitrogen atom of the amino group) can easily form at least one intramolecular cross-hydrogen bond (intramolecular hydrogen bond).
- the planarity of the molecule is improved, the intramolecular / intermolecular interaction is further improved, and the crystallinity of the azo pigment represented by the general formula (5-1), (5-2) or (5-3) (It becomes easier to form higher order structures), and the required performance as a pigment, light fastness, thermal stability, wet heat stability, water resistance, gas resistance and / or solvent resistance are greatly improved. Therefore, this is the most preferable example.
- the present invention also relates to the azo compounds represented by the general formulas (2) and (2-1), tautomers thereof, salts or hydrates thereof.
- Y represents a hydrogen atom or an aliphatic group.
- R 1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, Group, a sulfonamide group, an amino group or a heterocyclic group
- R 21 and R 22 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group.
- Z 1 is an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamide group, an amino group or a heterocyclic group
- Z 1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group,
- R 1 , R Represents a trimer through 21 , R 22 , R 6 , Y, Y 21 , Z 1 , Z 2 , G 0 or G 1.
- R 1 , R 21 , R 22 , R 6 , Y, Y 21 , Z 1 , Z 2 , G 0 or G 1 represents a tetramer.
- the compound represented by the general formula (2) is preferably a compound represented by the following general formula (3).
- R 1 , R 21 , Z 1 , R 6 , R 5 , Y 21 and n are the same as those defined in General Formula (1) and General Formula (2).
- G 4 Represents one of the following (G-1) to (G-6).)
- the compound represented by the general formula (2-1) is preferably a compound represented by the following general formula (4).
- Salts and hydrates of the azo compounds represented by the general formula (2), general formula (3) and general formula (4) of the present invention and tautomers thereof include the azo pigment salts, hydrates and The thing similar to the tautomerism can be mentioned.
- the novel azo compound of the present invention is useful as an azo pigment.
- azo pigments and azo compounds represented by the general formulas (1) to (4) and (2-1) are shown below.
- the azo pigments used in the present invention and the azo compounds of the present invention are as follows.
- the present invention is not limited to the following examples.
- 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 pigments represented by the general formulas (1) to (4) and (2-1) of the present invention have a chemical structural formula of the general formulas (1) to (4), (2-1) or a tautomer thereof. Any pigment may be used as long as it is a polymorph.
- Crystal polymorphs refer to 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 results) and X-Ray Analysis (X-ray crystal structure analysis results).
- the crystalline polymorph exists in the pigment represented by the general formulas (1) to (4) and (2-1) of the present invention, it may be any polymorph, and a mixture of two or more polymorphs. However, it is preferable that the main component is a single crystal type.
- the polymorph is not mixed, and the content of the azo pigment having a single crystal type is 70% by mass to 100% by mass, preferably 80% by mass to 100% by mass, based on the whole azo pigment.
- the content is preferably 90% by mass to 100% by mass, more preferably 95% by mass to 100% by mass, and particularly preferably 100% by mass.
- 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 above-described tautomerism and / or crystal polymorphism can be controlled by the production conditions during the coupling reaction.
- the azo pigments represented by the general formulas (1) to (4) and (2-1) have an acid group
- part or all of the acid group is a salt type.
- a salt type 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 optionally substituted with an alkyl group or hydroxyalkyl group, 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 pigments represented by the general formulas (1) to (4) and (2-1) may be hydrates containing water molecules in the crystals.
- the heterocyclic amine represented by the following general formula (6) is diazonium with non-aqueous acidity, and a coupling reaction is performed with a compound represented by the following general formula (7) in an acidic state, followed by post-treatment by a conventional method.
- the azo pigment represented by the general formula (1) can be produced.
- heterocyclic amines represented by the general formula (6) can be obtained as commercial products, they are generally produced by a known and commonly used method, for example, the method described in Japanese Patent No. 4022221. be able to.
- the heterocyclic coupler represented by the general formula (7) can be produced by the method described in JP-A-56-20062 and JP-A-2002-371079 and a method analogous thereto.
- the diazoniumation reaction of the heterocyclic amine represented by the above reaction scheme is carried out at a temperature of 15 ° C.
- the reaction can be carried out for about 6 minutes to 6 hours.
- the coupling reaction is performed by reacting the diazonium salt obtained by the above method with the compound represented by the general formula (7) at 40 ° C. or lower, preferably 25 ° C. or lower for 10 minutes to 12 hours. Can do.
- the synthesis method when n in the general formula (1) and the general formula (2) is 2 or more is R 1 to R 3 , G, Y, X 1 , X 2 in the general formula (6) or the general formula (7).
- a raw material into which a divalent, trivalent or tetravalent substituent which can be substituted can be synthesized and synthesized in the same manner as in the above scheme.
- crystals are precipitated in this way, but in general, water or an alcohol solvent is added to the reaction solution to precipitate the crystals, and the crystals can be collected by filtration. it can.
- an alcohol solvent, water or the like can be added to the reaction solution to precipitate crystals, and the precipitated crystals can be collected by filtration. The crystals collected by filtration can be washed and dried as necessary to obtain an azo pigment represented by the general formula (1).
- the compounds represented by the above general formulas (1) to (4) and (2-1) are obtained as crude azo pigments (crude) by the above production method.
- the post-treatment is performed. It is desirable to do.
- post-treatment methods include solvent salt milling, salt milling, dry milling, solvent milling, pigment particle control step by grinding treatment such as acid pasting, solvent heating treatment, resin, surfactant and dispersant. The surface treatment process by etc. is mentioned.
- the compounds represented by the general formulas (1) to (4) and (2-1) of the present invention are preferably subjected to solvent heat treatment and / or solvent salt milling as post-treatment.
- 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 thereof include a solvent, polar aprotic organic solvents such as N, N-dimethylformamide, N, N-dimethylacetamide, and N-methyl-2-pyrrolidone, glacial acetic acid, pyridine, and mixtures thereof.
- 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 face / BR> so, 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 for example, a crude azo pigment, an inorganic salt, and an organic solvent that does not dissolve the crude azo pigment are charged into a kneader and kneaded and ground therein.
- the inorganic salt a water-soluble inorganic salt can be preferably used.
- an inorganic salt such as sodium chloride, potassium chloride, sodium sulfate is preferably used.
- an inorganic salt having an average particle size of 0.5 to 50 ⁇ m 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.
- the organic solvent a water-soluble organic solvent can be suitably used, and a high boiling point solvent is preferable from the viewpoint of safety because the solvent easily evaporates due to a temperature rise during kneading.
- organic solvents examples 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 contains at least one azo pigment, tautomer, salt or hydrate represented by any one of the general formulas (1) to (4) and (2-1). It is characterized by that. 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 methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, t-butanol, pentanol, hexanol, cyclohexanol, benzyl alcohol and other alcohols, ethylene glycol, diethylene glycol
- Polyhydric 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 Methyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, di
- 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.
- the content is not particularly limited.
- the content may be 0 to 100% by mass with respect to the pigment.
- surfactants and dispersants may be used to improve pigment dispersion and image quality.
- examples of the surfactant include anionic, nonionic, cationic and amphoteric surfactants. Any surfactant may be used, but anionic or nonionic surfactants may be used. It is preferable to use it.
- the content is not particularly limited.
- the content may be 0 to 100% by mass with respect to the pigment.
- anionic surfactants 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, naphthalene sulfonic 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 fatty acid Examples include esters, polyoxyethylene fatty acid esters, polyoxyethylene alkylamines, fluorine-based materials, and silicon-based materials.
- the non-aqueous pigment dispersion of the present invention is obtained by dispersing the pigment represented by the general formula (1) 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 chlorinated polyprop
- 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 volume average particle diameter of the pigment is preferably 10 nm or more and 250 nm or less.
- 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 pigment.
- 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 putting 3 ml of the pigment dispersion in a measuring cell. As parameters to be input at the time of measurement, ink viscosity was used as the viscosity, and pigment density was used as the density of the dispersed particles.
- More preferable volume average particle diameter is 20 nm or more and 250 nm or less, and further preferably 30 nm or more and 230 nm or less.
- the number average particle size of the particles in the pigment dispersion is less than 20 nm, there are cases where the storage stability cannot be ensured, whereas 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 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 dispersion containing the azo compound of the present invention can also contain the above-mentioned components constituting the pigment dispersion, and the preferred concentration of the azo compound contained in the dispersion is the same as that described for the pigment dispersion. is there.
- azo pigments and azo compounds of the present invention include image recording materials for forming images, particularly color images, and specifically, thermal recording including ink jet recording materials described in detail below.
- a solid-state image pickup device such as a CCD
- a color filter for recording / reproducing a color image used in a display such as an LCD or a PDP
- a dyeing solution for dyeing various fibers.
- the azo pigment of the present invention is used by adjusting physical properties such as solvent resistance, dispersibility, and heat mobility suitable for the application with a substituent. Further, the azo pigment of the present invention can be used in an emulsified and dispersed state and further in a solid dispersed state depending on the system used.
- the colored composition of the present invention means a colored composition containing at least one azo pigment of the present invention.
- the coloring composition of the present invention can contain a medium, but when a solvent is used as the medium, it is particularly suitable as an ink for inkjet recording.
- the coloring composition of the present invention can be produced by using a lipophilic medium or an aqueous medium as a medium and dispersing the azo pigment of the present invention in the medium. Preferably, an aqueous medium is used.
- the coloring composition of the present invention includes an ink composition excluding a medium.
- the coloring composition of the present invention may contain other additives as necessary 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 (described in JP-A No. 2003-306623) such as foaming agents, viscosity modifiers, dispersants, dispersion stabilizers, rust preventives, chelating agents and the like can be mentioned. These various additives are directly added to the ink liquid in the case of water-soluble ink. In the case of oil-soluble ink, it is common to add to the dispersion after preparation of the azo pigment dispersion, but it may be added to the oil phase or water phase at the time of preparation.
- the pigment dispersion described above is used for the inkjet recording ink of the present invention (hereinafter sometimes referred to as “ink”).
- it is prepared by mixing a water-soluble solvent, water and the like.
- the pigment dispersion of the present invention may be used as it is.
- the content of the pigment dispersion in the ink of the present invention is preferably in the range of 1 to 100% by mass in consideration of the hue, color density, saturation, transparency and the like of the image formed on the recording medium.
- the range of mass% is particularly preferable, and the range of 3 to 10 mass% is most preferable.
- the azo pigment or azo compound of the present invention it is preferable to contain 0.1 to 20 parts by mass of the azo pigment or azo compound of the present invention in 100 parts by mass of the ink of the present invention, and more preferably 0.2 to 10 parts by mass.
- the content is preferably 1 to 10 parts by mass.
- other pigments may be used in combination with the pigment of the present invention. When two or more kinds of pigments are used in combination, the total content of the pigments is preferably within the above range.
- the ink 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 color ink, a cyan color ink, and a yellow color ink can be used, and a black color ink may be further used to adjust the color tone.
- pigments can be used simultaneously in addition to the azo pigment according to the present invention.
- yellow pigments that can be applied include C.I. I. P. Y. 74, C.I. I. P. Y. 128, C.I. I. P. Y. 155, C.I. I. P. Y. 213, and magenta pigments that can be applied include C.I. I. P. V. 19, C.I. I. P. R. 122, and examples of applicable cyan pigments include C.I. I. P. B. 15: 3, C.I. I. P. B. 15: 4 can be mentioned, and apart from these, any one can be used.
- Applicable black materials include disazo, trisazo, and tetraazo pigments, as well as carbon black dispersions.
- polyhydric alcohols As the water-soluble solvent used in the inkjet recording ink of the present invention, polyhydric alcohols, polyhydric alcohol derivatives, nitrogen-containing solvents, alcohols, sulfur-containing solvents, and the like are used. Specific examples include polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,5-pentanediol, 1,2,6-hexanetriol, and glycerin.
- polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,5-pentanediol, 1,2,6-hexanetriol, and glycerin.
- polyhydric alcohol derivative examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monobutyl ether, dipropylene glycol monobutyl ether, diglycerin. And ethylene oxide adducts.
- nitrogen-containing solvent examples include pyrrolidone, N-methyl-2-pyrrolidone, cyclohexyl pyrrolidone, and triethanolamine.
- alcohols include alcohols such as ethanol, isopropyl alcohol, butyl alcohol, and benzyl alcohol.
- the solvent examples include thiodiethanol, thiodiglycerol, sulfolane, dimethyl sulfoxide and the like.
- propylene carbonate, ethylene carbonate, or the like can be used.
- the water-soluble solvent used in the present invention may be used alone or in combination of two or more.
- the content of the water-soluble solvent is 1% by mass or more and 60% by mass or less, preferably 5% by mass or more and 40% by mass or less of the entire ink.
- a sufficient optical density may not be obtained.
- the amount is more than 60% by mass, the viscosity of the liquid increases. In some cases, the ejection characteristics of the ink liquid become unstable.
- the surface tension of the ink is preferably 20 mN / m or more and 60 mN / m or less. More preferably, it is 20 mN or more and 45 mN / m or less, More preferably, it is 25 mN / m or more and 35 mN / m or less. If the surface tension is less than 20 mN / m, liquid may overflow on the nozzle surface of the recording head, and printing may not be performed normally. On the other hand, if it exceeds 60 mN / m, the permeability to the recording medium after printing may be slow, and the drying time may be slow. The surface tension was measured under the environment of 23 ° C. and 55% RH using a Wilhelmy surface tension meter as described above.
- the viscosity of the ink is preferably from 1.2 mPa ⁇ s to 8.0 mPa ⁇ s, more preferably from 1.5 mPa ⁇ s to less than 6.0 mPa ⁇ s, still more preferably from 1.8 mPa ⁇ s to 4. It is less than 5 mPa ⁇ s.
- the viscosity was measured using a rotational viscometer Rheomat 115 (manufactured by Contraves) at 23 ° C. and a shear rate of 1400 s ⁇ 1 .
- water is added to the ink in a range that achieves the above-described preferable surface tension and viscosity.
- the amount of water added is not particularly limited, but is preferably 10% by mass to 99% by mass, and more preferably 30% by mass to 80% by mass with respect to the entire ink.
- cellulose derivatives such as polyethyleneimine, polyamines, polyvinylpyrrolidone, polyethylene glycol, ethylcellulose, carboxymethylcellulose, polysaccharides and derivatives thereof, other water-soluble polymers, acrylics Polymer emulsion, polyurethane emulsion, polymer emulsion such as hydrophilic latex, hydrophilic polymer gel, cyclodextrin, macrocyclic amines, dendrimers, crown ethers, urea and its derivatives, acetamide, silicone surfactant, fluorine-based A surfactant or the like can be used.
- cellulose derivatives such as polyethyleneimine, polyamines, polyvinylpyrrolidone, polyethylene glycol, ethylcellulose, carboxymethylcellulose, polysaccharides and derivatives thereof, other water-soluble polymers, acrylics Polymer emulsion, polyurethane emulsion, polymer emulsion such as hydrophilic latex, hydrophilic poly
- alkali metals such as potassium hydroxide, sodium hydroxide, lithium hydroxide, ammonium hydroxide, triethanolamine, diethanolamine, ethanolamine, 2-amino-2-methyl
- Nitrogen-containing compounds such as 1-propanol, alkaline earth metal compounds such as calcium hydroxide, acids such as sulfuric acid, hydrochloric acid and nitric acid, strong acid and weak alkali salts such as ammonium sulfate, and the like
- a pH buffer, an antioxidant, a fungicide, a viscosity modifier, a conductive agent, an ultraviolet absorber, and the like can be added as necessary.
- FIG. 1 shows an infrared absorption chart.
- FIG. 2 shows an infrared absorption chart.
- This solution was ice-cooled and kept at ⁇ 5 to 0 ° C., 0.67 g of sodium nitrite was added and stirred for 1 hour to obtain a diazonium salt solution.
- 1.8 g of compound (10) was dissolved in 15 ml of methanol, and the above diazonium salt solution was added thereto at 8 ° C. or lower.
- the ice bath was removed and the mixture was further stirred for 2 hours.
- the reaction solution was added to 100 ml of ice water, 120 ml of 10% aqueous sodium hydroxide solution was further added, and the mixture was stirred for 30 minutes. The precipitated crystals were separated by filtration and washed with sufficient water.
- FIG. 3 shows an infrared absorption chart.
- FIG. 4 shows an infrared absorption chart.
- FIG. 5 shows an infrared absorption chart.
- This solution was ice-cooled and kept at ⁇ 5 to 0 ° C., 0.61 g of sodium nitrite was added and stirred for 1 hour to obtain a diazonium salt solution.
- 2.0 g of compound (13) was dissolved in 70 ml of ethoxyethanol, and the aforementioned diazonium salt solution was added thereto at 8 ° C. or lower.
- the ice bath was removed and the mixture was further stirred for 2 hours.
- the reaction solution was added to 50 ml of methanol and stirred at room temperature for 2 hours. The precipitated crystals were filtered and washed with 70 ml of methanol.
- FIG. 20 shows an infrared absorption chart.
- FIG. 7 shows an infrared absorption chart.
- This solution was ice-cooled and kept at ⁇ 5 to 0 ° C., 0.46 g of sodium nitrite was added and stirred for 1 hour to obtain a diazonium salt solution.
- 0.93 g of compound (17) was dissolved in 10 ml of methanol, and the above diazonium salt solution was added thereto at 8 ° C. or lower.
- the ice bath was removed and the mixture was further stirred for 2 hours.
- the reaction solution was added to 30 ml of acetonitrile and stirred at room temperature for 30 minutes. The precipitated crystals were filtered and washed with 20 ml of acetonitrile.
- FIG. 27 shows an infrared absorption chart. IR charts of representative compounds synthesized by Synthesis Examples 1 to 8 and similar methods are shown in FIGS.
- Example 1 Specific Compound Example D-1 (Pigment (D-1)) 2.5 parts, sodium oleate 0.5 part, glycerin 5 parts, water 42 parts are mixed, and planetary together with 100 parts of zirconia beads having a diameter of 0.1 mm. Dispersion was performed at 300 rpm for 6 hours using a mold ball mill. After the completion of dispersion, zirconia beads were separated to obtain pigment dispersion 1.
- Example 2 As a polymer dispersant, 5 parts of pigment (D-1) synthesized in Synthesis Example 1, METAKU represented by Dispersant Solution 10 described on page 22 of International Publication No.
- Example 1 In place of the pigment of Example 1, C.I. I. A yellow comparative pigment dispersion 1 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.
- Example 2 instead of the pigment (D-1) used in Example 1, C.I. I. A yellow comparative pigment dispersion 2 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.
- Pigment dispersions 3 to 22 were prepared in the same manner except that the specific compound example D-1 of Example 1 was changed as shown in Table 1, and the same evaluation was performed.
- Example 31 A polymer dispersant represented by Dispersant 10 described on page 22 of International Publication No. WO2006 / 064193 was neutralized with an aqueous potassium hydroxide solution. 30 parts by mass of the synthetic azo pigment (D-1) and 95 parts by mass of ion-exchanged water are added to 75 parts by mass of the resulting aqueous dispersant solution (solid content concentration 20%) and mixed with a disper stirring blade. ⁇ Roughly disperse. 600 parts by mass of zirconia beads were added to the mixed and roughly dispersed liquid, and this was dispersed with a disperser (sand grinder mill) for 4 hours, and then separated into beads and a dispersion.
- a disperser sand grinder mill
- Example 11 A comparison was made in the same manner as in Example 31 except that a yellow pigment (CI Pigment Yellow 128 (CROMOPHTAL YELLOW 8GN manufactured by Ciba Specialty) was used instead of the azo pigment (D-1) used in Example 31. A pigment dispersion 31 was obtained.
- CI Pigment Yellow 128 CROMOPHTAL YELLOW 8GN manufactured by Ciba Specialty
- D-1 azo pigment
- Example 32 The pigment dispersion 31 obtained in Example 31 was 5% by mass in solid content, 10% by mass of glycerin, 5% by mass of 2-pyrrolidone, 2% by mass of 1,2-hexanediol, 2% by mass of triethylene glycol monobutyl ether, Each component was added so that it might become 0.5 mass% of propylene glycol, and 75.5 mass% of ion-exchange water, and the obtained liquid mixture was filtered with a 1 ⁇ m pore size filter (acetylcellulose membrane, outer diameter: 25 mm, Fujifilm Corporation).
- the pigment ink liquid 5 of the present invention shown in Table 2 was obtained by filtering through a syringe with a capacity of 20 ml equipped with a) and removing coarse particles.
- Comparative Example 12 A comparative pigment ink liquid 5 was obtained in the same manner as in Example 32 except that the comparative pigment dispersion 31 obtained in Comparative Example 11 was used instead of the pigment dispersion 31 obtained in Example 31.
- Comparative Example 13 Further, as a comparative type of ink, an ink liquid used for a yellow ink cartridge of PX-V630 manufactured by Epson Corporation was used as a comparative pigment ink liquid 6.
- Example 32 pigment ink liquid 5
- comparative example comparative pigment ink liquid 5 and PX-V630 yellow pigment ink liquid; comparative pigment ink liquid 6
- the results are shown in Table 2.
- the fastness to ignition was evaluated by measuring the density of the print sample before and after storing the print sample for 7 days at 80 ° C. and 60% RH with an X-rite 310 to determine the image residual ratio.
- the image afterimage rate is evaluated at three points of reflection density of 1, 1.5 and 2, and A is the case where the image remaining rate is 95% or more at any density, and B is the case where the point is less than 95%.
- the case where the concentration was less than 95% was defined as C.
- ozone resistance ozone fastness
- the sample was left in a box where the ozone gas concentration was set to 5 ppm (25 ° C; 50%) for 14 days, and the image density before and after being left under ozone gas was measured using a reflection densitometer (X Measurement was performed using a Photographic Densitometer 310) manufactured by Rite and evaluated as an image residual ratio. The reflection density was measured at three points of 1, 1.5 and 2.0.
- the ozone gas concentration in the box was set using an ozone gas monitor (model: OZG-EM-01) manufactured by APPLICS. The evaluation was made in three stages, with A as the case where the image remaining ratio was 80% or higher at any density, and B when 1 or 2 points were less than 80%, and C when less than 70% at all densities.
- Presence or absence of occurrence of metallic luster The yellow, green and red solid print portions were visually observed and evaluated with reflected light. The case where the metallic luster was not visible was evaluated as “ ⁇ ”, and the case where the metallic luster was visible was evaluated as “x”.
- Example 33 An image of the pigment ink liquid prepared in Example 32 was printed on Fujifilm's inkjet paper photo glossy paper “Image” using PX-V630 manufactured by Epson Corporation. When similar evaluations were made, similar results were obtained. As is apparent from the results in Tables 1 and 2, Pigment Dispersions 1 to 20 and Pigment Ink Liquid 5 using the pigment of the present invention are excellent in color tone and exhibit high coloring power and light resistance. Therefore, the pigment dispersion using the pigment of the present invention can be suitably used, for example, for printing ink such as inkjet.
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Abstract
Description
また、顔料を使用するにあたっては、他にも、所望の透明性を発現させるために必要な粒子径および粒子形を有すること、使用される環境条件下における堅牢性、例えば耐光性、耐熱性、オゾンなどの酸化性ガスに対する耐性、その他有機溶剤や亜硫酸ガスなどへの耐薬品堅牢性が良好であること、使用される媒体中において微小粒子まで分散し、かつ、その分散状態が安定であること、等の性質も必要となる。特に、良好な色相を有し、光、湿熱及び環境中の活性ガス、中でも着色力が高く、光に対して堅牢な顔料が強く望まれている。
従来から知られている含窒素5員環をアゾ成分とするアゾ染料は、特許文献2~5にも開示されている。
下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩または水和物。
〔2〕
前記一般式(1)で表されるアゾ顔料が、下記一般式(2)又は一般式(2-1)で表わされることを特徴とする〔1〕に記載のアゾ顔料、その互変異性体、それらの塩または水和物。
〔3〕
〔1〕又は〔2〕に記載のアゾ顔料、その互変異性体、それらの塩または水和物を少なくとも一種含有することを特徴とする顔料分散物。
〔4〕
〔1〕又は〔2〕に記載のアゾ顔料、その互変異性体、それらの塩または水和物を少なくとも一種含有することを特徴とする着色組成物。
〔5〕
〔3〕に記載の顔料分散物を用いたことを特徴とするインクジェット記録用インク。
〔6〕
一般式(2)又は一般式(2-1)で表わされることを特徴とするアゾ化合物。
さらに、本発明の顔料分散物は、本発明のアゾ顔料を種々の媒体に分散させてなり、色彩的特性、耐久性および分散安定性に優れる。
本発明における脂肪族基において、その脂肪族部位は直鎖、分岐鎖および環状のいずれであってもよい。また、飽和であっても不飽和であっても良い。具体的には例えば、アルキル基、アルケニル基、シクロアルキル基、シクロアルケニル基等を挙げることができる。さらに脂肪族基は無置換であっても置換基を有していてもよい。
ハメット則はベンゼン誘導体の反応または平衡に及ぼす置換基の影響を定量的に論ずるために1935年L.P.Hammettにより提唱された経験則であるが、これは今日広く妥当性が認められている。ハメット則に求められた置換基定数にはσp値とσm値があり、これらの値は多くの一般的な成書に見出すことができるが、例えば、J.A.Dean編、「Lange’s Handbook of Chemistry」第12版、1979年(Mc Graw-Hill)や「化学の領域」増刊、122号、96~103頁、1979年(南光堂)に詳細に記載されている。なお、本発明において各置換基をハメットの置換基定数σpにより限定したり説明したりするが、これは上記の成書で見出せる、文献既知の値がある置換基にのみ限定されるという意味ではなく、その値が文献未知であってもハメット則に基づいて測定した場合にその範囲内に含まれるであろう置換基をも含むことはいうまでもない。本発明の一般式(1)または(2)、で表される化合物はベンゼン誘導体ではないが、置換基の電子効果を示す尺度として、置換位置に関係なくσp値を使用する。本発明においては今後、σp値をこのような意味で使用する。
顔料は、色素分子間の強力な相互作用による凝集エネルギーによって、分子同士がお互いに強固に結合しあっている状態のことである。この状態を作るには、分子間のファンデルワールス力、分子間水素結合が必要であることが、例えば、日本画像学会誌、43巻、10頁(2004年)等に記載されている。
分子間のファンデルワールス力を強めるには、分子への芳香族基、極性基および/又はヘテロ原子の導入等が考えられる。また、分子間水素結合を形成させるには、分子へのヘテロ原子に結合した水素原子を含有する置換基の導入および/又は電子供与性の置環基の導入等が考えられる。更に分子全体の極性が高い方が好ましいと考えられる。そのためには、例えば、アルキル基等鎖状の基は短い方が好ましく、分子量/アゾ基の値は小さい方が好ましいと考えられる。
これらの観点から、顔料分子は、アミド結合、スルホンアミド結合、エーテル結合、スルホン基、オキカルボニル基、イミド基、カルバモイルアミノ基、ヘテロ環、ベンゼン環等を含有することが好ましい。
一般式(1)で表される化合物は、その特異的な構造により色素分子の分子間相互作用を形成しやすく、水または有機溶媒等に対する溶解性が低く、アゾ顔料とすることができる。
顔料は、水や有機溶媒等に分子分散状態で溶解する染料とは異なり、溶媒中に分子集合体等の固体粒子として微細に分散するものである。
また、下記一般式(1)で表される特定の構造を有することにより、着色力、色相等の色彩的特性において優れた特性を示し、かつ耐光性、耐オゾン性等の耐久性にも優れた特性を示すことができる。
次に一般式(1)で表される顔料について説明する。
Gで表されるアリール基としては、縮環していても良く、置換基を有していても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。Gで表されるアリール基として、好ましくは炭素数6~12のアリール基であり、より好ましくは総炭素原子数6~10のアリール基であり、例えばフェニル、4-ニトロフェニル、4-アセチルアミノフェニル、4-メタンスルホニルフェニル等が挙げられる。
Gで表されるヘテロ環基としては、置換基を有していても良く、飽和であっても不飽和であっても良く、縮環していても良く、好ましくは総炭素原子数2~12の炭素原子で結合したヘテロ環基であり、より好ましくは炭素原子で結合した総炭素原子数2~10の不飽和5~6員へテロ環であり、更に好ましくは炭素原子で結合した総炭素原子数2~10で、該ピラゾール環に結合している隣接位に窒素原子を有する不飽和5~6員へテロ環であり、最も好ましくは炭素原子で結合した芳香族6員へテロ環であり、例えば2-テトラヒドロフリル、2-フリル、2-ピロリル、2-チアゾリル、2-ベンゾチアゾリル、2-オキサゾリル、2-ベンゾオキサゾリル、2-ピリジル、2-ピラジニル、3-ピリダジニル、2-ピリミジニル、4-ピリミジニル、2-イミダゾリル、2-ベンズイミダゾリル、2-トリアジニル等が挙げられ、これらのヘテロ環基は置換基と共に互変異性体構造であっても良い。Gのヘテロ環基に置換しても良い基としては、前述の置換基の項で述べた基で、置換可能なものであれば何でも良いが、好ましくは、脂肪族基、アリール基、ヒドロキシ基、ハロゲン原子、脂肪族オキシ基、脂肪族チオ基、置換されていてもよいアミノ基、カルバモイルアミノ基、アシルアミノ基、スルホンアミド基、カルバモイル基、スルファモイル基等であって、より好ましくは、脂肪族基、ヒドロキシ基、脂肪族オキシ基、脂肪族チオ基、置換されていてもよいアミノ基、カルバモイルアミノ基、アシルアミノ基、カルバモイル基等である。
R1、R2及びR3で表される脂肪族アミノ基としては、置換基を有していても良く、飽和であっても不飽和であっても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。R1及びR2の脂肪族アミノ基として、好ましくは総炭素原子数1~8の脂肪族アミノ基であり、より好ましくは総炭素原子数1~4のアルキルアミノ基であり、例えばメチルアミノ、エチルアミノ、ジメチルアミノ、ジエチルアミノ、メトキシエチルアミノ等が挙げられる。R3で表される脂肪族アミノ基として、好ましくは該アミノ基に水素原子が結合した総炭素原子数1~8の脂肪族アミノ基であり、より好ましくは該アミノ基に水素原子が結合した総炭素原子数1~4のアルキルアミノ基であり、例えばメチルアミノ、エチルアミノ、メトキシエチルアミノ、アセチルアミノエチルアミノ等が挙げられる。
R1、R2及びR3で表されるアリールアミノ基としては、置換基を有していても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。アリールアミノ基が置換基を有する場合、アミノ基に対してメタ位及び/又はパラ位に置換基を有することが好ましく、パラ位にのみ置換基を有することがより好ましい。
R1、R2及びR3のアリールアミノ基として、好ましくは総炭素原子数6~16のアリールアミノ基であり、より好ましくは総炭素原子数6~8のアリールアミノ基であり、例えばアニリノ、4-アセチルアミノアニリノ、N-メチル-3-メトキシアニリノ、3-カルバモイルアニリノ、3-カルバモイルアミノアニリノ等が挙げられる。
R1、R2及びR3で表されるヘテロ環アミノ基としては、置換基を有していても良く、飽和であっても不飽和であっても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。R1、R2及びR3のヘテロ環アミノ基として、好ましくは総炭素原子数2~16のヘテロ環アミノ基であり、より好ましくは総炭素原子数2~12の5~6員環のヘテロ環アミノ基であり、例えば2-ピリジルアミノ、2-ピリミジルアミノ、2-ピロリジニルアミノ等が挙げられる。
Zで表される脂肪族オキシカルボニル基としては、置換基を有していても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。Zで表される脂肪族オキシカルボニル基として、好ましくは総炭素原子数2~12の脂肪族オキシカルボニル基であり、より好ましくは、総炭素原子数2~8のアルコキシカルボニル基であり、例えば、メトキシカルボニル、エトキシカルボニル、カルバモイルメトキシカルボニル等が挙げられる。
R5で表されるカルバモイル基としては、置換基を有していても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。R5のカルバモイル基として、好ましくは総炭素原子数1~7のカルバモイル基であり、より好ましくは総炭素原子数1~5の無置換又はアルキル置換のカルバモイル基であり、更に好ましくは無置換カルバモイル基であり、例えば、無置換カルバモイル、N-メチルカルバモイル、N,N-ジメチルカルバモイル、N―エチルカルバモイル等が挙げられる。
R5で表される脂肪族オキシカルボニル基としては、置換基を有していても良く、置換しても良い基としては、前述の置換基の項で述べた基で、置換可能な基であれば何でも良い。R5で表される脂肪族オキシカルボニル基として、好ましくは総炭素原子数2~8の脂肪族オキシカルボニル基であり、より好ましくは、総炭素原子数2~6のアルコキシカルボニル基であり、例えば、メトキシカルボニル、エトキシカルボニル、カルバモイルメトキシカルボニル等が挙げられる。
本発明の効果の点で、一般式(1)のYは水素原子であることが好ましい。本発明の効果の点で、一般式(1)のR1は脂肪族基、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アミノ基、ヘテロ環基であることが好ましく、脂肪族基、脂肪族アミノ基、アリールアミノ基、アミノ基、ヘテロ環であることが更に好ましく、アルキル基、アルキルアミノ基、窒素原子で結合した飽和へテロ環基である場合は最も好ましい。
本発明の効果の点で、一般式(1)のR2としては、脂肪族アミノ基、アリールアミノ基、アシルアミノ基、アミノ基又はヘテロ環基である場合が好ましく、アルキルアミノ基、アリールアミノ基、アシルアミノ基、アミノ基又はヘテロ環基である場合がより好ましく、アルキルアミノ基、アリールアミノ基、アシルアミノ基、アミノ基又は窒素原子で結合した飽和ヘテロ環基である場合が更に好ましく、アルキルアミノ基、アリールアミノ基又は窒素原子で結合した飽和ヘテロ環基である場合が最も好ましい。
一般式(1)のR3としては、脂肪族アミノ基、アリールアミノ基、アシルアミノ基又はアミノ基である場合が好ましく、該窒素原子に水素原子が結合したアルキルアミノ基、該窒素原子に水素原子が結合したアリールアミノ基又はアミノ基である場合がより好ましく、該窒素原子に水素原子が結合したアルキルアミノ基又は該窒素原子に水素原子が結合したアリールアミノ基である場合が更に好ましく、該窒素原子に水素原子が結合したアルキルアミノ基(モノアルキルアミノ基で、該アルキルは置換基を有していてもよい)である場合が最も好ましい。
本発明の効果の点で、一般式(1)のX1はC-Zである場合が好ましく、Zはシアノ基、カルバモイル基又は脂肪族オキシカルボニル基である場合がより好ましく、シアノ基又は脂肪族オキシカルボニル基である場合は更に好ましく、シアノ基である場合は最も好ましい。
本発明の効果の点で、一般式(1)のX2は窒素原子である場合及びC-R5で、R5が水素原子、シアノ基またはカルバモイル基である場合が好ましく、X2が窒素原子である場合及びC-R5で、R5が水素原子、またはシアノ基である場合がより好ましく、X2がC-R5で、R5が水素原子またはシアノ基である場合が特に好ましく、X2がC-R5で、R5がシアノ基である場合は最も好ましい。nは1~4の整数を表すが、好ましくはnは1、2、又は3であり、より好ましくは1、または2である。
G1が表す炭素原子、窒素原子と共に形成する5~6員ヘテロ環としては、置換基を有していても良く、飽和環であっても不飽和環であっても、芳香族環であっても縮環していても良く、好ましくは総炭素原子数2~12の炭素原子で結合したヘテロ環基であり、より好ましくは総炭素原子数2~10の不飽和5~6員へテロ環であり、例えば、2-チアゾリル、2-ベンゾチアゾリル、2-オキサゾリル、2-ベンゾオキサゾリル、2-ピリジル、2-ピラジニル、3-ピリダジニル、2-ピリミジニル、4-ピリミジニル、2-イミダゾリル、2-ベンズイミダゾリル、2-トリアジニル等が挙げられ、これらのヘテロ環基は置換基と共に互変異性体構造であっても良い。
Z1、Z2で表されるハメットのσp値が0.2以上の電子求引性基としては、一般式(1)のZで述べたものと同じであり、好ましい置換基、範囲とも同じである。
本発明の効果の点で、Y21は水素原子であることが好ましい。
本発明の効果の点で、一般式(2)のR6は、水素原子、脂肪族基及びアリール基である場合が好ましく、水素原子、アルキル基及びアリール基である場合はより好ましく、アルキル基及びアリール基である場合は更に好ましく、アルキル基である場合は特に好ましく、メチル基である場合は最も好ましい。
本発明の効果の点で、一般式(2-1)のR6は、水素原子、脂肪族基及びアリール基である場合が好ましく、水素原子、アルキル基及びアリール基である場合はより好ましく、水素原子及びアルキル基である場合は更に好ましく、アルキル基である場合は特に好ましく、メチル基である場合は最も好ましい。
また、一般式(2-1)で表される顔料は、R1、R3、R22がアミノ基、アルキルアミノ基、アシルアミノ基であって、G0がアルキル基であって、Z2が脂肪族オキシカルボニル基の場合、色相が黄色~赤色であり光堅牢性に優れて好ましい。
本発明の効果の点で、一般式(2)で表される顔料は、R1がアルキル基、アルキルアミノ基、アリールアミノ基、アミノ基又は窒素原子で結合した飽和へテロ環基であって、R21がアルキルアミノ基、アリールアミノ基、アミノ基又は窒素原子で結合した飽和ヘテロ環基であって、Z1が脂肪族オキシカルボニル基、シアノ基又はカルバモイル基であって、X2は窒素原子又はC-R5であって、R5は水素原子またはシアノ基であって、R6はアルキル基、アリール基であって、G1が表す炭素原子、窒素原子と共に形成する5~6員ヘテロ環として、(G-1)~(G-13)のいずれかであって、Y21が水素原子またはメチル基であって、nが1又は2である場合が好ましい。
本発明の効果の点で、一般式(2)で表される顔料は、R1がアルキル基であって、R21がアルキルアミノ基、アリールアミノ基又は窒素原子で結合した飽和ヘテロ環基であって、Z1が脂肪族オキシカルボニル基またはシアノ基であって、X2はC-R5であって、R5は水素原子またはシアノ基であって、R6はアルキル基、アリール基であって、G1が表す炭素原子、窒素原子と共に形成する5~6員ヘテロ環として、(G-1)~(G-6)のいずれかであって、Y21が水素原子またはメチル基であって、nが1又は2である場合がより好ましい。
本発明の効果の点で、一般式(2)で表される顔料は、R1がアルキル基であって、R21がアルキルアミノ基、アリールアミノ基又は窒素原子で結合した飽和ヘテロ環基であって、Z1が脂肪族オキシカルボニル基またはシアノ基であって、X2はC-R5であって、R5は水素原子、シアノ基であって、R6はアルキル基であって、G1が表す炭素原子、窒素原子と共に形成する5~6員ヘテロ環として、(G-1)、(G-4)、又は(G-6)であって、Y21が水素原子であって、nが1である場合が更に好ましい。
本発明の効果の点で、一般式(2)で表される顔料は、R1がアルキル基であって、R21がアリールアミノ基であって、Z1が脂肪族オキシカルボニル基またはシアノ基であって、X2はC-R5であって、R5はシアノ基であって、R6はアルキル基であって、G1が表す炭素原子、窒素原子と共に形成する5~6員ヘテロ環として、(G-4)であって、Y21が水素原子であって、nが1である場合が最も好ましい。
本発明の効果の点で、一般式(2-1)で表される顔料は、Yが水素原子であって、R1がアルキルアミノ基、アリールアミノ基、アミノ基、窒素原子で結合した飽和ヘテロ環基であって、R22がアルキルアミノ基、アリールアミノ基、アミノ基、又は窒素原子で結合した飽和ヘテロ環基であって、Z2が脂肪族オキシカルボニル基又は置換していてもよいカルバモイル基であって、X2は窒素原子又はC-R5であって、R5は水素原子又はシアノ基であって、R6はアルキル基、アリール基であって、nが1または2である場合が好ましい。
本発明の効果の点で、一般式(2-1)で表される顔料は、Yが水素原子であって、R1がアルキルアミノ基、アリールアミノ基、アミノ基であって、R22がアルキルアミノ基、アリールアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基又は置換していてもよいカルバモイル基であって、X2は窒素原子であって、R6はアルキル基、アリール基であって、nが1または2である場合がより好ましい。
本発明の効果の点で、一般式(2-1)で表される顔料は、Yが水素原子であって、R1がアルキルアミノ基、アミノ基であって、R22がアルキルアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基又は置換していてもよいカルバモイル基であって、X2は窒素原子であって、R6はアルキル基であって、nが1または2である場合が更に好ましい。
本発明の効果の点で、一般式(2-1)で表される顔料は、Yが水素原子であって、R1がアルキルアミノ基、アミノ基であって、R22がアルキルアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基であって、X2は窒素原子であって、R6はアルキル基であって、nが1または2である場合が最も好ましい。
Yが水素原子であって、R1がアルキルアミノ基、アリールアミノ基、アミノ基であって、R22がアルキルアミノ基、アリールアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基又は置換していてもよいカルバモイル基であって、R6はアルキル基、アリール基であって、nが1または2である場合がより好ましく、
Yが水素原子であって、R1がアルキルアミノ基、アミノ基であって、R22がアルキルアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基又は置換していてもよいカルバモイル基であって、R6はアルキル基であって、nが1または2である場合が更に好ましく、
Yが水素原子であって、R1がアルキルアミノ基、アミノ基であって、R22がアルキルアミノ基、アミノ基、アシルアミノ基であって、Z2が脂肪族オキシカルボニル基であって、R6はアルキル基であって、nが1または2である場合が最も好ましい。
例えば、一般式(1)で表される顔料には、下記一般式(1’)で表されるアゾ-ヒドラゾンの互変異性体が考えられる。
本発明は、一般式(1)で表されるアゾ顔料の互変異性体である以下の一般式(1’)で表される化合物もその範囲に含むものである。
また、本発明において、一般式(1)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特に好ましい。
一般式(1)~(4)、(2-1)で表されるアゾ顔料のうち、前述したように特に好ましいアゾ顔料の一般式の例としては、前記一般式(5-1)、(5-2)または(5-3)で表されるアゾ顔料を挙げることができる。
この構造が好ましい要因としては、一般式(5-1)、(5-2)または(5-3)で示すようにアゾ顔料構造に含有するヘテロ環を構成する窒素原子、水素原子およびヘテロ原子(カルボニル基の酸素原子またはアミノ基の窒素原子)が少なくとも1個以上の分子内の交叉水素結合(分子内水素結合)を容易に形成し易いことが挙げられる。その結果、分子の平面性が上がり、更に分子内・分子間相互作用が向上し、一般式(5-1)、(5-2)または(5-3)で表されるアゾ顔料の結晶性が高くなり(高次構造を形成し易くなり)、顔料としての要求性能である、光堅牢性、熱安定性、湿熱安定性、耐水性、耐ガス性及びまたは耐溶剤性が大幅に向上するため、最も好ましい例となる。
本発明は前記一般式(2)及び(2-1)で表されるアゾ化合物、その互変異性体、それらの塩または水和物にも関する。
本発明の新規なアゾ化合物は、アゾ顔料として有用である。
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。
以下に反応スキームを示す。
一般式(1)及び一般式(2)のnが2以上の場合の合成方法は、一般式(6)または一般式(7)のR1~R3、G、Y、X1、X2等において、置換可能な2価、3価あるいは4価の置換基を導入した原料を合成し、前記スキームと同様に合成することができる。
このようにして反応させたものは、結晶が析出しているものもあるが、一般的には反応液に水、あるいはアルコール系溶媒を添加し、結晶を析出させ、結晶を濾取することができる。また、反応液にアルコール系溶媒、水等を添加して結晶を析出させて、析出した結晶を濾取することができる。濾取した結晶を必要に応じて洗浄・乾燥して、一般式(1)で表されるアゾ顔料を得ることができる。
溶媒加熱処理に使用される溶媒としては、例えば、水、トルエン、キシレン等の芳香族炭化水素系溶媒、クロロベンゼン、o-ジクロロベンゼン等のハロゲン化炭化水素系溶媒、イソプロパノール、イソブタノール等のアルコール系溶媒、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、N-メチル-2-ピロリドン等の極性非プロトン性有機溶媒、氷酢酸、ピリジン、またはこれらの混合物等が挙げられる。上記で挙げた溶媒に、さらに無機または有機の酸または塩基を加えても良い。溶媒加熱処理の温度は所望する顔・BR>ソの一次粒子径の大きさによって異なるが、40~150℃が好ましく、60~100℃がさらに好ましい。また、処理時間は、30分~24時間が好ましい。
ソルベントソルトミリングとしては、例えば、粗アゾ顔料と、無機塩と、それを溶解しない有機溶剤とを混練機に仕込み、その中で混練磨砕を行うことが挙げられる。上記無機塩としては、水溶性無機塩が好適に使用でき、例えば塩化ナトリウム、塩化カリウム、硫酸ナトリウム等の無機塩を用いることが好ましい。また、平均粒子径0.5~50μmの無機塩を用いることがより好ましい。当該無機塩の使用量は、粗アゾ顔料に対して3~20質量倍とするのが好ましく、5~15質量倍とするのがより好ましい。有機溶剤としては、水溶性有機溶剤が好適に使用でき、混練時の温度上昇により溶剤が蒸発し易い状態なるため、安全性の点から高沸点溶剤が好ましい。このような有機溶剤としては、例えばジエチレングリコール、グリセリン、エチレングリコール、プロピレングリコール、液体ポリエチレングルコール、液体ポリプロピレングリコール、2-(メトキシメトキシ)エタノール、2-ブトキシエタノール、2ー(イソペンチルオキシ)エタノール、2-(ヘキシルオキシ)エタノール、ジエチレングリコールモノメチルエーテル、ジエチレングル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、トリエチレングリコールモノメチルエーテル、1-メトキシ-2-プロパノール、1-エトキシ-2-プロパノール、ジプロピレングリコール、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールまたはこれらの混合物が挙げられる。当該水溶性有機溶剤の使用量は、粗アゾ顔料に対して0.1~5質量倍が好ましい。混練温度は、20~130℃が好ましく、40~110℃が特に好ましい。混練機としては、例えばニーダーやミックスマーラー等が使用できる。
本発明の顔料分散物は、一般式(1)~(4)、(2-1)のいずれかで表されるアゾ顔料、互変異性体、その塩または水和物を少なくとも1種を含むことを特徴とする。これにより、色彩的特性、耐久性および分散安定性に優れた顔料分散物とすることができる。
本発明の着色組成物は、少なくとも一種の本発明のアゾ顔料を含有する着色組成物を意味する。本発明の着色組成物は、媒体を含有させることができるが、媒体として溶媒を用いた場合は特にインクジェット記録用インクとして好適である。本発明の着色組成物は、媒体として、親油性媒体や水性媒体を用いて、それらの中に、本発明のアゾ顔料を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。本発明の着色組成物には、媒体を除いたインク用組成物も含まれる。本発明の着色組成物は、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しうる。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2003-306623号公報に記載)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。油溶性インクの場合には、アゾ顔料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。
次に、本発明のインクジェット記録用インクについて説明する。
本発明のインクジェット記録用インク(以下、「インク」という場合がある)は、上記で説明した顔料分散物を用いる。好ましくは、水溶性溶媒、水等を混合して調製される。ただし、特に問題がない場合は、前記本発明の顔料分散物をそのまま用いてもよい。
その他必要に応じ、pH緩衝剤、酸化防止剤、防カビ剤、粘度調整剤、導電剤、紫外線吸収剤、等も添加することができる。
具体的化合物例D-1の合成は、以下のルートで合成した。
107gの3-メトキシプロピルアミンを10℃で攪拌下に50gの化合物(0)を加えて、120℃で3時間攪拌した。反応液を室温まで冷却し、水300ml、酢酸エチル300mlを加えた。静置し、水層を除去し、酢酸エチル層を飽和食塩水300mlで2回洗浄し、硫酸マグネシウムで乾燥した。硫酸マグネシウムを除去した後、濃縮し内容物を200mlとした。この溶液を攪拌下にヘキサン25mlを徐々に添加し、25℃で2時間攪拌した。
析出した結晶をろ別、乾燥し、化合物(2)を56.6g得た。収率は72.5%であった。
1.7gの化合物(1)を20mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.67gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(2)3.0gをメタノール15mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に3時間攪拌した。反応液にメタノール50mlを添加し、30分間攪拌し、析出した結晶を濾別し、メタノール30mlでかけ洗いをした。結晶を乾燥せずに水100mlに加え、炭酸水素ナトリウム1gを水30mlに溶かした溶液を添加し、20~25℃で30分間攪拌した。析出している結晶を濾別し、更に水で充分にかけ洗いした。得られた結晶を乾燥させずにメタノール100mlに加え、過熱溶解した。水50mlを徐々に滴下し、50℃で1時間攪拌し、更に室温下で30分間攪拌した。析出している結晶を濾過し、冷メタノール20mlでかけ洗いした。得られた結晶を乾燥し、本発明の化合物D-1を3.2g得た。収率63.7%
図1に赤外吸収チャートを示す。
具体的化合物例D-3の合成は、以下のルートで合成した。
15gの化合物(2)を50gのリン酸と50gのポリリン酸に加えて130℃で3時間加熱攪拌した。反応液を冷却し、氷水200gを25℃以下で添加した。この溶液に酢酸エチル200mlを添加し、氷冷下10~15℃で攪拌し、20%水酸化ナトリウム水溶液を350ml添加した。静置し、酢酸エチル層を分液し、飽和食塩水100mlで2回洗浄した。酢酸エチルを濃縮除去し、得られた油状物をシリカゲルカラムクロマトグラフィで精製し、淡黄色色油状物の化合物(3)を9.5g得た。収率69.3%
0.86gの化合物(1)を10mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.33gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(3)1.4gをメタノール10mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液を氷水100mlに添加し、水酸化ナトリウム8g/10ml水を添加した。30分間攪拌し、析出した結晶を濾別し、水でかけ洗いをした。結晶を乾燥せずにメタノール100mlに加え、水20mlを添加し、1時間加熱攪拌した。その後空冷攪拌し、析出している結晶を濾別し、更に冷メタノール20mlでかけ洗いした。得られた結晶を乾燥し、本発明の化合物D-3を1.6g得た。収率65.3%
図2に赤外吸収チャートを示す。
具体的化合物例D-5の合成は、以下のルートで合成した。
40gの化合物(0)にメタノール200mlを添加し、40℃に攪拌下に、40%メチルアミンメタノール溶液30mlを40~43℃で滴下した。更に40~43℃で2時間攪拌した後、氷水で冷却し、攪拌をした。析出している結晶を濾過し、水で充分洗浄した。得られた結晶を乾燥し、化合物(5)と(6)の混合物を34.5g得た。収率88.9%
(7)、(8)の合成
5gの化合物(5)と(6)の混合物にモルホリン5gを加え、120℃で1時間攪拌した。反応液を50℃まで冷却し、水50mlを加え、1時間攪拌した。析出した結晶を濾過し、充分に水で洗浄した。得られた結晶を乾燥し、化合部(7)と(8)の混合物を5.5g得た。収率85.9%
(10)の合成
5.5gの化合物(7)と(8)の混合物を20gのリン酸と20gのポリリン酸に加えて130℃で3時間加熱攪拌した。反応液を冷却し、氷水50gを25℃以下で添加した。この溶液に酢酸エチル100mlを添加し、氷冷下10~15℃で攪拌し、20%水酸化ナトリウム水溶液を250ml添加した。静置し、酢酸エチル層を分液し、飽和食塩水100mlで2回洗浄した。酢酸エチルを濃縮除去し、得られた油状物をシリカゲルカラムクロマトグラフィで精製し、無色油状物の化合物(10)を4.5g得た。収率92.2%
D-5の合成
1.7gの化合物(1)を20mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.67gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(10)1.8gをメタノール15mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液を氷水100mlに添加し、更に10%水酸化ナトリウム水溶液120mlを添加し、30分間攪拌した。析出した結晶を濾別し、充分な水で、かけ洗いをした。結晶を乾燥せずにメタノール100mlで加熱溶解し、ごみ濾過をし、加熱、常圧でメタノールを濃縮し、約60ml濃縮し、室温で1時間攪拌を行った。析出した結晶を濾過し、冷メタノール20mlでかけ洗いした。得られた結晶を乾燥せずにメタノール30ml、水30mlを加え、外温70℃で1時間攪拌した後、室温で1時間攪拌した。析出している結晶を濾過し、水/メタノール=1/1 30mlでかけ洗いをした。得られた結晶を乾燥し、本発明の化合物D-5を1.9g得た。収率54.1%
図3に赤外吸収チャートを示す。
具体的化合物例D-7の合成は、以下のルートで合成した。
1.5gの化合物(1)を15mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.60gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。このジアゾニュウム塩溶液に1.1gの化合物(11)を加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液を10℃以下に冷却し、メタノール80mlを添加し、30分間攪拌した。析出した結晶を濾過し、水でかけ洗いをした。得られた結晶を乾燥せずに水150ml、DMAc15mlを加え、25℃で攪拌下に炭酸水素ナトリウム6gを添加し、25℃で1時間攪拌した。結晶を濾過し、得られた結晶を乾燥させずに、メタノール100mlに加え、更に水20mlを添加し、1間加熱攪拌した。その後空冷攪拌し、析出している結晶を濾別し、冷メタノール20mlでかけ洗いした。得られた結晶を乾燥し、本発明の化合物D-7を1.8g得た。収率69.2%
図4に赤外吸収チャートを示す。
具体的化合物例D-9の合成は、以下のルートで合成した。
図5に赤外吸収チャートを示す。
具体的化合物例D-85の合成は、以下のルートで合成した。
40gの化合物(0)にメタノール200mlを添加し、40℃に攪拌下に、40%メチルアミンメタノール溶液30mlを40~43℃で滴下した。更に40~43℃で2時間攪拌した後、氷水で冷却し、攪拌をした。析出している結晶を濾過し、水で充分洗浄した。得られた結晶を乾燥し、化合物(5)と(6)の混合物を34.5g得た。この混合物を酢酸エチル1000mlで再結晶をし、化合物(6)を17.0g得た。収率43.8%
(13)の合成
3gの化合物(6)にパラトルイジン3.6gを加え、150℃で3時間攪拌した。反応液を50℃まで冷却し、水50mlを加え、1時間攪拌した。析出した結晶を濾過し、充分に水で洗浄した。得られた結晶をアセトニトリル45mlで再結晶し、化合物(13)を2.2g得た。収率52.8%
D-85の合成
1.5gの化合物(1)を15mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.61gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(13)2.0gをエトキシエタノール70mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液にメタノール50mlに添加し、室温で2時間攪拌した。析出している結晶を濾過し、メタノール70mlでかけ洗いした。結晶を乾燥せずに1%炭酸水素ナトリュウム水溶液に加え、1時間攪拌した。結晶を濾別し、充分な水でかけ洗いをした。得られた結晶を乾燥させずにジメチルアセトアミド(DMAc)45ml/水30mlの溶液に添加し、80℃で1時間攪拌をした後、室温で2時間攪拌した。析出している結晶を濾過し、DMAc/メタノール=1/1 30mlでかけ洗いをした。得られた結晶を乾燥し、本発明の化合物D-85を2.8g得た。収率78.9%
図20に赤外吸収チャートを示す。
具体的化合物例D-40の合成は、以下のルートで合成した。
20gの化合物(13)にアセトニトリル100mlを加え、5℃で攪拌化に40%メチルアミン溶液60mlを20℃以下で30分間で滴下した。滴下後60~65℃で30分間加熱し、室温まで冷却した。析出した結晶をろ過し、水でかけ洗いをした。得られた結晶をメタノール100mlで再結晶をして化合物(14)を13.3g得た。収率70.7%
(15)の合成
5gの化合物(14)にモルホリン5.3gを加え外温120℃で5時間攪拌した。反応液を室温まで冷却し水50mlを添加し、1時間攪拌した。析出している結晶を濾過し、充分な水でかけ洗いをし、結晶を乾燥して、化合物(15)を5.5g得た。収率84.6%
D-40の合成
1gの化合物(1)を10mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.40gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(15)1.2gをメタノール80mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液にメタノール30mlに添加し、室温で2時間攪拌した。析出している結晶を濾過し、メタノール70mlでかけ洗いした。結晶を乾燥せずに1%炭酸水素ナトリュウム水溶液に加え、1時間攪拌した。結晶を濾別し、充分な水でかけ洗いをした。得られた結晶を乾燥させずにジメチルアセトアミド(DMAc)30ml/水30mlの溶液に添加し、80℃で1時間攪拌をした後、室温で2時間攪拌した。析出している結晶を濾過し、DMAc/メタノール=1/1 30mlでかけ洗いをした。得られた結晶を乾燥し、本発明の化合物D-40を1.2g得た。収率53.0%
図7に赤外吸収チャートを示す。
具体的化合物例D-77の合成は、以下のルートで合成した。
2.9gの化合物(19)と1,3ジアミノプロパン0.75gにDMAc5mlを加え、120℃で3時間攪拌した。反応液にメタノール/アセトニトリル=1/2溶液を10ml加え、攪拌した。析出した結晶を濾過し、メタノール/アセトニトリル=1/2溶液10mlでかけ洗いをし、化合物(17)を2.0g得た。収率69.0%
D-77の合成
1gの化合物(18)を10mlのリン酸に加えて30℃に加温し溶かした。この溶液を氷冷して-5~0℃に保ち、亜硝酸ナトリウム0.46gを加えて1時間攪拌し、ジアゾニウム塩溶液を得た。別に化合物(17)0.93gをメタノール10mlに溶解し、この中に前述のジアゾニウム塩溶液を8℃以下で加えた。添加終了と同時に氷浴をはずし、更に2時間攪拌した。反応液にアセトニトリル30mlに添加し、室温で30分間攪拌した。析出している結晶を濾過し、アセトニトリル20mlでかけ洗いした。結晶を乾燥せずに1%炭酸水素ナトリュウム水溶液50mlに加え、1時間攪拌した。結晶を濾別し、充分な水でかけ洗いをした。得られた結晶を乾燥させずにジメチルアセトアミド(DMAc)15ml/水25mlの溶液に添加し、80℃で1時間攪拌をした後、室温で2時間攪拌した。析出している結晶を濾過し、DMAc/水=1/2 30mlでかけ洗いをした。得られた結晶を乾燥し、本発明の化合物D-77を1.1g得た。収率55.0%
図27に赤外吸収チャートを示す。
合成例1~8および同様な方法で合成した代表的化合物のIRチャート図1~図27に示す。
具体的化合物例D-1(顔料(D-1))2.5部、オレイン酸ナトリウム0.5部、グリセリン5部、水42部を混合し、直径0.1mmのジルコニアビーズ100部とともに遊星型ボールミルを用いて毎分300回転、6時間分散を行った。分散終了後、ジルコニアビーズを分離し、顔料分散物1を得た。
〔実施例2〕
合成例1で合成した顔料(D-1)5部、高分子分散剤として、国際公開番号WO2006/064193号パンフレットの22ページに記載されているDispersant Solution 10で表されるメタク・BR>潟去_-メタクリル酸エステル共重合体水溶液25.5部、水19.5部を混合し、直径0.1mmのジルコニアビーズ100部とともに遊星型ボールミルを用いて毎分300回転で6時間分散を行った。分散終了後、ジルコニアビーズを分離し、顔料分散物2を得た。
実施例1の顔料に変えて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と同様にして黄色の比較顔料分散物1を得た。
実施例1で用いた顔料(D-1)に変えて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と同様にして黄色の比較顔料分散物2を得た。
実施例1で用いた顔料(D-1)に変えて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と同様にして黄色の比較顔料分散物3を得た。
〔比較例4〕
実施例1で用いた顔料(D-1)に変えて下記比較化合物4を用いた以外は実施例1と同様にして青色の比較顔料分散物4を得た。
特開昭56-20062号公報に記載の化合物
<分散安定性>
上記で得られた各顔料分散物を動的光散乱粒径測定装置(日機装(株)マイクロトラックUPA150)を用いて、常法により体積平均粒子径を測定した。顔料分散物を作製して2時間後に測定した体積平均粒子径、および70℃で2日間保存後の体積平均粒子径が、共に130nm~30nmのものを○(良好)、230nm~131nmのものを△(良)、いずれかが230nm以上、あるいは30nm以下のものを×(不良)とした。結果を表1に示す。
<着色力評価>
上記で得られた各顔料分散物をNo.3のバーコーターを用いてセイコーエプソン(株)社製フォトマット紙<顔料専用>に塗布した。得られた塗布物の画像濃度を反射濃度計(X-Rite社製X-Rite938)を用いて測定し、「着色力(OD:OpticalDensity)」として結果を表1に示す。
<耐光性評価>
着色力評価に用いた画像濃度1.0の塗布物を、フェードメーターを用いてキセノン光(170000lux.;325nm以下カットフィルター存在下)を14日間照射し、キセノン照射前後の画像濃度を、反射濃度計を用いて測定し、色素残存率[(照射後濃度照射前濃度)×100%]として評価した。結果を表1に示す。
実施例1の具体的化合物例D-1を表1のように変更した以外は、同様にして顔料分散物3~22を作成し、同様な評価を行なった。
国際公開番号WO2006/064193の22ページに記載されているDispersant 10で表される高分子分散剤を水酸化カリウム水溶液で中和した。得られた分散剤水溶液75質量部(固形分濃度20%)の中に、前記合成のアゾ顔料(D-1)30質量部及びイオン交換水95質量部を加えて、ディスパー攪拌翼にて混合・粗分散する。混合・粗分散した液にジルコニア・ビーズを600質量部を入れて、これを分散機(サンドグラインダミル)で4時間分散した後、ビーズと分散液に分離した。得られた混合物を攪拌しながら、25℃でポリエチレングリコールジグリシジルエ-テル2質量部をゆっくり加え、50℃で6時間攪拌した。更に、分画分子数300Kの限外濾過膜を使って不純物を除去し、これをポアサイズ5μmのフィルター(アセチルセルロース膜、外径:25mm、富士フイルム(株)社製)を取り付けた容量20mlのシリンジで濾過し、粗大粒子を除去することにより固形分濃度10%の顔料分散物31(粒径80nm:日機装(株)社製Nanotrac150(UPA-EX150)を用いて測定)を得た。
実施例31において用いたアゾ顔料(D-1)の代わりに、イエロー顔料(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31と同様にして比較顔料分散物31を得た。
実施例31で得られた顔料分散物31を固形分で5質量%、グリセリン10質量%、2-ピロリドン5質量%、1,2―ヘキサンジオール2質量%、トリエチレングリコールモノブチルエーテル2質量%、プロピレングリコール0.5質量%、イオン交換水75.5質量%になる様に各成分を加えて、得られた混合液をポアサイズ1μmのフィルター(アセチルセルロース膜、外径:25mm、富士フイルム(株)社製)を取り付けた容量20mlのシリンジで濾過し、粗大粒子を除去することにより表2に示す本発明の顔料インク液5を得た。
実施例31で得られた顔料分散物31の代わりに、比較例11で得られた比較顔料分散物31を用いた以外は実施例32と同様にして比較顔料インク液5を得た。
また、インクの比較タイプとしてエプソン(株)社製のPX-V630のイエローインクカートリッジに使用のインク液を比較顔料インク液6として用いた。
1)吐出安定性については、カートリッジをプリンターにセットし全ノズルからのインクの突出を確認した後、A4 20枚出力し、以下の基準で評価した。
A:印刷開始から終了まで印字の乱れ無し
B:印字の乱れのある出力が発生する
C:印刷開始から終了まで印字の乱れあり
[1]光堅牢性は印画直後の画像濃度CiをX-rite310にて測定した後、アトラス社製ウェザーメーターを用い画像にキセノン光(10万ルックス)を14日照射した後、再び画像濃度Cfを測定し画像残存率Cf/Ci×100を求め評価を行った。画像残像率について反射濃度が1、1.5、2の3点にて評価し、いずれの濃度でも画像残存率が80%以上の場合をA、2点が80%未満の場合をB、全ての濃度で80%未満の場合をCとした。
何れの濃度でも画像残存率が80%以上の場合をA、1又は2点が80%未満をB、全ての濃度で70%未満の場合をCとして、三段階で評価した。
金属光沢の見えないものを「○」、金属光沢の見えるものを「×」として評価した。
表2の結果から明らかなように、本発明のインク液を使用した系ではすべての性能に優れていることがわかる。特に比較例に対して、光堅牢性及びインク液安定性が優れている。
実施例32で作製した顔料インク液を、エプソン(株)社製のPX-V630にて画像を富士フイルム(株)社製インクジェットペーパーフォト光沢紙「画彩」にプリントし、実施例32と同様な評価を行ったところ、同様な結果が得られた。
表1、表2の結果から明らかなように、本発明の顔料を用いた顔料分散物1~20及び顔料インク液5は色調に優れ、高い着色力及び耐光性を示す。
従って、本発明の顔料を用いた顔料分散物は、例えば、インクジェットなどの印刷用のインク等に好適に使用することができる。
本出願は、2008年3月7日出願の日本特許出願(特願2008-58707)、及び2008年12月16日出願の日本特許出願(特願2008-319660)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 (6)
- 下記一般式(1)で表されるアゾ顔料、その互変異性体、それらの塩または水和物。
(一般式(1)中、Gは脂肪族基、アリール基又はヘテロ環基を表し、Yは水素原子又は脂肪族基を表す。R1は、脂肪族基、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アシルアミノ基、スルホンアミド基、アミノ基又はヘテロ環基を表し、R2及びR3は、それぞれ独立に、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アシルアミノ基、スルホンアミド基、アミノ基又はヘテロ環基を表す。X1は窒素原子又はC-Zを表す。Zはハメットのσp値が0.2以上の電子求引性基を表す。X2は窒素原子又はC-R5を表す。R5は水素原子、シアノ基、カルバモイル基、脂肪族オキシカルボニル基又はカルボキシル基を表す。nは1~4の整数を表す。n=2の場合は、R1、R2、R3、Y、ZまたはGを介した2量体を表す。n=3の場合はR1、R2、R3、Y、ZまたはGを介した3量体を表す。n=4の場合はR1、R2、R3、Y、ZまたはGを介した4量体を表す。) - 前記一般式(1)で表されるアゾ顔料が、下記一般式(2)又は一般式(2-1)で表わされることを特徴とする請求項1に記載のアゾ顔料、その互変異性体、それらの塩または水和物。
(一般式(2)、及び一般式(2-1)中、Y、R1、n及びX2は一般式(1)で定義したものと同じである。R6は水素原子、脂肪族基、アリール基またはヘテロ環基を表す。R21、R22は、それぞれ独立に、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アシルアミノ基、スルホンアミド基、アミノ基又はヘテロ環基を表す。G1は炭素原子、窒素原子と共に5~6員環を表し、該へテロ環は芳香族環であっても、縮環していても良い。G0は脂肪族基を表し、Z1、Z2はハメットのσp値が0.2以上の電子求引性基を表す。Y21は水素原子又はメチル基を表す。) - 請求項1又は請求項2に記載のアゾ顔料、その互変異性体、それらの塩または水和物を少なくとも一種含有することを特徴とする顔料分散物。
- 請求項1又は請求項2に記載のアゾ顔料、その互変異性体、それらの塩または水和物を少なくとも一種含有することを特徴とする着色組成物。
- 請求項3に記載の顔料分散物を用いたことを特徴とするインクジェット記録用インク。
- 一般式(2)又は一般式(2-1)で表わされることを特徴とするアゾ化合物。
(一般式(2)、及び一般式(2-1)中、Yは水素原子又は脂肪族基を表す。R1は、脂肪族基、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アシルアミノ基、スルホンアミド基、アミノ基又はヘテロ環基を表し、R21、R22は、それぞれ独立に、脂肪族アミノ基、アリールアミノ基、ヘテロ環アミノ基、アシルアミノ基、スルホンアミド基、アミノ基又はヘテロ環基を表す。Z1、Z2はハメットのσp値が0.2以上の電子求引性基を表す。X2は窒素原子又はC-R5を表す。R5は水素原子、シアノ基、カルバモイル基、脂肪族オキシカルボニル基又はカルボキシル基を表す。R6は水素原子、脂肪族基、アリール基またはヘテロ環基を表す。G0は脂肪族基を表し、G1は炭素原子、窒素原子と共に5~6員環を表し、該へテロ環は芳香族環であっても、縮環していても良い。Y21は水素原子又はメチル基を表す。nは1~4の整数を表す。n=2の場合は、R1、R21、R22、R6、Y、Y21、Z1、Z2、G0またはG1を介した2量体を表す。n=3の場合はR1、R21、R22、R6、Y、Y21、Z1、Z2、G0またはG1を介した3量体を表す。n=4の場合はR1、R21、R22、R6、Y、Y21、Z1、Z2、G0またはG1を介した4量体を表す。)
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JP2003231845A (ja) * | 2002-02-12 | 2003-08-19 | Fuji Photo Film Co Ltd | インクジェット記録用インク及びインクジェット記録方法 |
JP4895341B2 (ja) * | 2004-07-08 | 2012-03-14 | 富士フイルム株式会社 | アゾ色素、インクジェット記録用インク、感熱記録材料、カラートナー、カラーフィルター、インクジェット記録方法、インクカートリッジ及びインクジェットプリンター |
JP2007084745A (ja) * | 2005-09-26 | 2007-04-05 | Fujifilm Corp | 着色組成物及びインクジェット記録用インク組成物 |
JP5114007B2 (ja) * | 2006-01-19 | 2013-01-09 | 富士フイルム株式会社 | インク、インクジェット用インク、インクジェット記録方法、及び着色画像材料の耐候性改良方法 |
JP2007203642A (ja) * | 2006-02-02 | 2007-08-16 | Fujifilm Corp | インクジェット記録用セット、及びインクジェット記録方法 |
JP2007246434A (ja) * | 2006-03-15 | 2007-09-27 | Fujifilm Corp | ピラゾール系化合物の製造方法 |
-
2008
- 2008-12-16 JP JP2008319660A patent/JP2009235381A/ja active Pending
-
2009
- 2009-03-05 EP EP09716363A patent/EP2253674A4/en not_active Withdrawn
- 2009-03-05 AU AU2009220562A patent/AU2009220562A1/en not_active Abandoned
- 2009-03-05 KR KR20107020001A patent/KR20100116657A/ko not_active Application Discontinuation
- 2009-03-05 WO PCT/JP2009/054177 patent/WO2009110554A1/ja active Application Filing
- 2009-03-05 CA CA2717742A patent/CA2717742A1/en not_active Abandoned
- 2009-03-05 CN CN2009801080763A patent/CN101959968B/zh not_active Expired - Fee Related
- 2009-03-05 US US12/921,272 patent/US8206465B2/en not_active Expired - Fee Related
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2390283A1 (en) * | 2010-05-31 | 2011-11-30 | FUJIFILM Corporation | Azo pigment or tautomer thereof, process for producing same, pigment dispersion, coloring composition, inkjet recording ink, coloring composition for color filter, and color filter |
US8298299B2 (en) | 2010-05-31 | 2012-10-30 | Fujifilm Corporation | Azo pigment or tautomer thereof, process for producing same, pigment dispersion, coloring composition, inkjet recording ink, coloring composition for color filter, and color filter |
Also Published As
Publication number | Publication date |
---|---|
CN101959968A (zh) | 2011-01-26 |
EP2253674A1 (en) | 2010-11-24 |
JP2009235381A (ja) | 2009-10-15 |
AU2009220562A1 (en) | 2009-09-11 |
CA2717742A1 (en) | 2009-09-11 |
EP2253674A4 (en) | 2011-07-06 |
US8206465B2 (en) | 2012-06-26 |
AU2009220562A2 (en) | 2010-09-30 |
CN101959968B (zh) | 2013-09-25 |
US20110011306A1 (en) | 2011-01-20 |
KR20100116657A (ko) | 2010-11-01 |
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