JP5286858B2 - Photo-curable inkjet ink - Google Patents

Description

  The present invention relates to a photocurable inkjet ink containing a photopolymerization initiator that is rapidly cured by light irradiation, and more specifically, it is possible to suppress coloring such as yellowing after ink curing, and light from a cured coating surface. The present invention relates to a photocurable inkjet ink that can suppress oozing and odor of polymerization initiators and other compositions such as volatilization and elution.

  A photopolymerization initiator is used to cure a polymerizable composition containing acrylate or the like by irradiation with UV light, and a sensitizer is used to obtain a highly hard film in a shorter time. Yes. These photopolymerization initiators and sensitizers are used in a wide range of fields, and commercially available photopolymerization initiators and sensitizers are described in “Photopolymer List”, pages 55 to 72, 1996. Year (Bunshin Publishing), “Latest UV Curing Handbook”, 1-50 pages, 2005 (Technical Information Association), etc.

  Thioxanthone derivatives are widely known as conventional photopolymerization initiators. The thioxanthone derivative is sometimes referred to as a sensitizer because a synergistic effect is observed in curability when used in combination with other photopolymerization initiators. Among thioxanthone derivatives, particularly, 2-chlorothioxanthone, 2- (or 4-) isopropylthioxanthone, 2,4-diethylthioxanthone, and the like can be used to obtain a polymerizable composition having high curability. Derivatives are used in polymerizable compositions in various fields. In order to further improve the curability of these thioxanthone derivatives, novel thioxanthone derivatives have been proposed (Patent Documents 1 to 3).

  Furthermore, in order to improve the compatibility with the polymerizable composition, a monomer-type thioxanthone derivative in which the photopolymerization initiator itself is given a function as a monomer has also been proposed (Patent Document 4). However, the thioxanthone derivative described in Patent Document 4 has a low ability as a photopolymerization initiator because of the urethane bond in its structure, and the ratio contained in the polymerizable composition is very high.

  In the photocurable inkjet ink using the photopolymerization initiator of the above prior art, coloring such as yellowing due to the photopolymerization initiator after the ink curing occurs, which is a problem. The problem of coloring due to the photopolymerization initiator derived from the ink after curing is not preferable because the color tone of the ink is impaired, and improvement is required. Furthermore, in the above-described conventional photocurable ink, since the photopolymerization initiator and other compositions bleed or volatilize from the cured ink film, it has been a serious problem in recent years. The problem of seepage and volatilization of the photopolymerization initiator that occurs from the ink cured after light irradiation not only affects the coating material but also the environment of the coating site, and further degrades the performance of the coating material. Therefore, improvement is needed. Then, the photoinitiator which aimed at the bleeding of the photoinitiator after ink hardening and the improvement of volatilization was also proposed (patent documents 5-9).

  In photocurable inkjet inks that use these photopolymerization initiators, the photopolymerization initiator exudation and volatilization that occurs from the cured ink can be suppressed compared to known photopolymerization initiators, but the requirements are completely satisfied. Therefore, further suppression is desired. In addition, in photocurable inkjet inks using these photopolymerization initiators, there are problems of insufficient ink curability and solvent resistance, in addition to the photopolymerization initiator bleeding and volatilization. The problem of insufficient curability is that it is difficult to obtain a high-hardness film in a short time and can be improved to some extent by increasing the amount of photopolymerization initiator added. Therefore, it is often difficult to obtain the desired physical properties. Therefore, further improvement in curability is desired. Further, these photocurable ink-jet inks have not been improved with respect to coloring problems such as yellowing due to the photopolymerization initiator derived from the ink after curing.

JP 58-32602 A JP 59-208541 A JP-A-61-34057 JP-A-4-26687 Japanese Patent Laid-Open No. 8-151404 WO 97/49664 Pamphlet JP 2004-224993 A JP-T-2005-512973 JP 2006-28514 A

  For these photocurable inkjet inks using known photopolymerization initiators, from the viewpoint of cost reduction and productivity improvement, a small amount of photopolymerization initiator added and curing with low light irradiation energy are required. ing. On the other hand, in these photo-curable inkjet inks, the photopolymerization initiator oozes out from the ink film after curing and the occurrence of volatilization impairs the environment of the coated product and the coating site, and deteriorates the performance of the coated product. Because it causes it, improvement is demanded. Further, since coloring such as yellowing after ink curing becomes a problem, it is necessary to suppress coloring as much as possible. It is difficult for the above-mentioned photo-curable inkjet ink to satisfy all requirements for curability and solvent resistance, oozing and volatilization of photopolymerization initiator that occurs from the ink film after curing, and coloring that occurs after ink curing. In particular, no photocurable ink-jet ink has been found that satisfies the requirements regarding coloring that occurs after ink curing.

  Therefore, the object of the present invention is to cure with a small amount of photopolymerization initiator added and with a small amount of light irradiation energy. It is to provide an inkjet ink.

  As a result of intensive studies to solve the above problems in consideration of the above problems, the present inventors have reached the present invention. That is, the present invention is a photocurable inkjet ink comprising a resin, a monomer, a pigment, and a photopolymerization initiator represented by the following general formula (1) or the following general formula (2).

General formula (1)

Wherein R ^{1 to} R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group , a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic oxy group, substitution or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted acyl group or a group represented by the following general formula (4), the represented. However, at least one of R ¹ to R ⁸ is a group represented by the following general formula (4). in addition, it expressed under following general formula (4) Te R ¹ to R ⁸ odor Substituents other than the groups that may be present may form a ring with adjacent substituents.)

General formula (2)

Wherein R ^{9 to} R ¹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group Substituted or unsubstituted heterocyclic group, substituted or unsubstituted heterocyclic oxy group, substituted or unsubstituted alkenyl group, substituted or unsubstituted alkoxycarbonyl group, substituted or unsubstituted acyl group, the following general formula (3 Or a group represented by the following general formula (4), a group represented by the general formula (3) in R ^{9 to} R ¹⁵ , and a group represented by the following general formula (4). Substituents other than the group to be formed may form a ring with adjacent substituents.
A ¹ represents a divalent linking group. )

General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group .)

General formula (4)

(Wherein R ¹⁷ represents a substituted or unsubstituted alkyl group .
A ² represents a divalent linking group. )

Furthermore, in the present invention, R ^{1 to} R ⁸ and R ^{9 to} R ¹⁵ are each independently a hydrogen atom, a group represented by the general formula (3), or a group represented by the general formula (4). The present invention relates to a photocurable ink-jet ink. (However, R ^{1 to} R ⁸ do not become general formula (3).)

The invention further one of R ¹ to R ⁸ is directed to the light-curable inkjet ink is a group represented by a general formula (4).

The present invention further, R ⁹ to R ¹⁵ is directed to the light-curable inkjet ink a hydrogen atom.

  Furthermore, this invention relates to the printed matter obtained by printing the said photocurable inkjet ink and making it harden | cure by light irradiation.

  The photopolymerization initiator of the present invention has a specific structure in which at least one carbonyloxy group is introduced with respect to thioxanthone, so that compared with a conventionally known thioxanthone derivative, polymerization by radicals generated by the photopolymerization initiator is performed. It is possible to cure the photocurable inkjet ink in a shorter time, such as reaction and crosslinking reaction, and to suppress the bleeding and volatilization of the photopolymerization initiator that occurs from the cured ink, and the coloration that occurs after the ink is cured. Is possible.

  Hereinafter, embodiments of the present invention will be described in detail.

  First, the photopolymerization initiator of the present invention will be described. The photopolymerization initiator of the present invention has a structure represented by the general formula (1) or (2). By having this structure, the compound of the present invention is highly sensitive to light irradiation. It functions as a safe material.

General formula (1)

Wherein R ^{1 to} R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group , a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic oxy group, substitution or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted acyl group or a group represented by the following general formula (4), the represented. However, at least one of R ¹ to R ⁸ is a group represented by the following general formula (4). in addition, it expressed under following general formula (4) Te R ¹ to R ⁸ odor Substituents other than the groups that may be present may form a ring with adjacent substituents.)

General formula (2)

Wherein R ^{9 to} R ¹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group Substituted or unsubstituted heterocyclic group, substituted or unsubstituted heterocyclic oxy group, substituted or unsubstituted alkenyl group, substituted or unsubstituted alkoxycarbonyl group, substituted or unsubstituted acyl group, general formula (3) Or a group represented by the following general formula (4), a group represented by the general formula (3) in R ^{9 to} R ¹⁵ , and a group represented by the following general formula (4). Substituents other than the linking group may form a ring with adjacent substituents.
A ¹ represents a divalent linking group. )

General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group .)

General formula (4)

(Wherein R ¹⁷ represents a substituted or unsubstituted alkyl group .
A ² represents a divalent linking group. )

  As shown in the general formula (1) or the general formula (2), the photopolymerization initiator of the present invention can introduce various substituents as long as the properties are not impaired. By introducing a substituent, the photopolymerization initiator of the present invention can be used by appropriately adjusting the absorption characteristics of energy rays such as the maximum absorption wavelength and transmittance, and the solubility in the resin or solvent used together.

R ^{1 to} R ⁸ in the general formula (1) are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl group, Table substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic oxy group, substitution or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted acyl group, were or general formula (4) Represents a group.

Also, a group in which at least one of R ¹ to R ⁸ are represented by a general formula (4).

Here, the substituted or unsubstituted alkyl group in R ^{1 to} R ⁸ is a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or 2 to 18 carbon atoms. Examples include linear, branched, monocyclic or condensed polycyclic alkyl groups interrupted by one or more —O—. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like, but are not limited thereto. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. Examples include _2- CH ₃ —, —CH ₂ —CH— (OCH ₃ ) _2, but are not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following, but are not limited thereto. It is not a thing.

The substituted or unsubstituted alkoxyl group in R ^{1 to} R ⁸ is a linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or one having 2 to 18 carbon atoms. Examples include linear, branched, monocyclic or condensed polycyclic alkoxyl groups interrupted by the above -O-. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted with one or more —O— include the following, but are not limited thereto. It is not a thing.

Examples of the substituted or unsubstituted aryl group in R ^{1 to} R ⁸ include a monocyclic or condensed polycyclic aryl group having 6 to 24 carbon atoms, and specific examples include a phenyl group, a 1-naphthyl group, and 2-naphthyl. Group, 1-anthryl group, 9-anthryl group, 2-phenanthryl group, 3-phenanthryl group, 9-phenanthryl group, 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group Group, 2-fluorenyl group, 9-fluorenyl group, 3-perylenyl group, o-tolyl group, m-tolyl group, p-tolyl group, 2,3-xylyl group, 2,5-xylyl group, mesityl group, p -Cumenyl group, p-dodecylphenyl group, o-methoxyphenyl group, m-methoxyphenyl group, p-methoxyphenyl group, 2,6-dimethoxyphenyl group, 3, -Dimethoxyphenyl group, 3,4,5-trimethoxyphenyl group, p-cyclohexylphenyl group, 4-biphenyl group, o-fluorophenyl group, m-chlorophenyl group, p-bromophenyl group, p-hydroxyphenyl group, Examples thereof include, but are not limited to, m-carboxyphenyl group, o-mercaptophenyl group, p-cyanophenyl group, m-nitrophenyl group, m-azidophenyl group and the like.

Examples of the substituted or unsubstituted aryloxy group in R ^{1 to} R ⁸ include a monocyclic or condensed polycyclic aryloxy group having 4 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, 2- Naphtyloxy group, 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group , 9-fluorenyloxy group and the like, but are not limited thereto. In addition, the aryl group and the oxygen atom may be bonded at positions other than those described above, and these are also included in the category of the substituent represented by R ^{1 to} R ⁸ of the present invention.

Examples of the substituted or unsubstituted heterocyclic group in R ^{1 to} R ⁸ include an aromatic or aliphatic heterocyclic group having 4 to 24 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. 2-thienyl group, 2-benzothienyl group, naphtho [2,3-b] thienyl group, 3-thianthrenyl group, 2-thianthrenyl group, 2-furyl group, 2-benzofuryl group, pyranyl group, isobenzofuranyl Group, chromenyl group, xanthenyl group, phenoxathiinyl group, 2H-pyrrolyl group, pyrrolyl group, imidazolyl group, pyrazolyl group, pyridyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, indolizinyl group, isoindolyl group, 3H-indolyl group 2-indolyl group, 3-indolyl group, 1H-indazolyl group, purinyl group, 4H-quinolidinyl group, Quinolyl group, quinolyl group, phthalazinyl group, naphthyridinyl group, quinoxanilyl group, quinazolinyl group, cinnolinyl group, pteridinyl group, 4aH-carbazolyl group, 2-carbazolyl group, 3-carbazolyl group, β-carbolinyl group, phenanthridinyl group, 2-acridinyl group, perimidinyl group, phenanthrolinyl group, phenazinyl group, phenalsadinyl group, isothiazolyl group, phenothiazinyl group, isoxazolyl group, furazanyl group, 3-phenixazinyl group, isochromanyl group, chromanyl group, pyrrolidinyl group, pyrrolinyl group, Imidazolidinyl group, imidazolinyl group, pyrazolidinyl group, pyrazolinyl group, piperidyl group, piperazinyl group, indolinyl group, isoindolinyl group, quinuclidinyl group, morpholinyl group, thioxanthrin Group, 4-quinolinyl group, 4-isoquinolyl group, 3-phenothiazinyl group, 2-phenoxathiinyl group, 3-coumarinyl group, 11,3-benzodioxol-5-yl group, 1,4-benzo Although a dioxane-6-yl group etc. can be mentioned, it is not limited to these.

Examples of the substituted or unsubstituted heterocyclic oxy group in R ^{1 to} R ⁸ include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include 2-furanyloxy group, 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carba A zolyloxy group, a 3-carbazolyloxy group, a 4-carbazolyloxy group, a 9-acridinyloxy group, and the like can be mentioned, but are not limited thereto. Further, the heterocyclic group and the oxygen atom may be bonded at positions other than those described above, and these are also included in the category of the substituent represented by R ^{1 to} R ⁸ of the present invention.

Examples of the substituted or unsubstituted alkoxycarbonyl group in R ^{1 to} R ⁸ include an alkoxycarbonyl group having 2 to 20 carbon atoms, and specific examples include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, and a butoxycarbonyl group. Hexyloxycarbonyl group, octyloxycarbonyl group, decyloxycarbonyl group, octadecyloxycarbonyl group, phenoxycarbonyl group, trifluoromethyloxycarbonyl group, 1-naphthyloxycarbonyl group, 2-naphthyloxycarbonyl group, 4-methylsulfanyl Phenyloxycarbonyl group, 4-phenylsulfanylphenyloxycarbonyl group, 4-dimethylaminophenyloxycarbonyl group, 4-diethylaminophenyloxycarbonyl group, Rophenyloxycarbonyl group, 2-methylphenyloxycarbonyl group, 2-methoxyphenyloxycarbonyl group, 2-butoxyphenyloxycarbonyl group, 3-cyanophenyloxycarbonyl group, 3-nitrophenyloxycarbonyl group, 4-fluorophenyl An oxycarbonyl group, 4-cyanophenyloxycarbonyl group, 4-methoxyphenyloxycarbonyl group, etc. are mentioned. In addition, the aryl group and the —OCO— bond may be bonded at positions other than those described above, and these are also included in the category of the substituent represented by R ^{1 to} R ⁸ of the present invention.

Examples of the substituted or unsubstituted acyl group in R ^{1 to} R ⁸ include a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, carbon A monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a carbonyl group, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom to which a monocyclic or condensed polycyclic aryl group of 6 to 18 is bonded. Examples include bonded carbonyl groups. Specific examples include formyl, acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, pivaloyl, lauroyl, myristoyl, palmitoyl, stearoyl, cyclopentyl. Carbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, crotonoyl group, isocrotono Group, oleoyl group, cinnamoyl group benzoyl group, 1-naphthoyl group, 2-naphthoyl group, 9-anthrylcarbonyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group, isonicotinoyl group and the like. However, it is not limited to these. In addition, the aryl group and the carbonyl group, the heterocyclic group and the carbonyl group may be bonded at positions other than those described above, and these are also included in the category of the substituent represented by R ^{1 to} R ⁸ of the present invention. .

Also, a substituent other than the groups represented by one Te R ¹ to R ⁸ Odor general formula (4) may form a ring with adjacent substituents.

R ^{1 to} R ⁸ described above may be further substituted with other substituents. Examples of such other substituents include a hydroxyl group, a carboxyl group, a sulfone group, a sulfonyl chloride group, an amide group, and a cyano group. , nitro group, c androgenic atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyloxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, an amino group, Examples include an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, an alkylarylamino group, a benzylamino group, and a dibenzylamino group.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the alkyl group include a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or a linear chain having 2 to 18 carbon atoms and interrupted by one or more —O—. , Branched, monocyclic or condensed polycyclic alkyl groups. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. _{2 -CH 3 -, - CH 2} -CH- (OCH 3) 2 , and the like.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryl group include monocyclic or condensed polycyclic aryl groups having 6 to 18 carbon atoms. Specific examples include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, Examples include 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 9-fluorenyl group and the like.

  Examples of the heterocyclic group include a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include a 2-furanyl group, 2 -Thienyl group, 2-indolyl group, 3-indolyl group, 2-benzofuryl group, 2-benzothienyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, 9-acridinyl group and the like can be mentioned.

  The acyl group includes a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed polyvalent group having 6 to 18 carbon atoms. Examples include a carbonyl group to which a cyclic aryl group is bonded, a carbonyl group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. It may have an unsaturated bond, and specific examples thereof include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristoyl group, palmitoyl group , Stearoyl group, cyclopentylcarbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, crotonoy Group, isocrotonoyl group, oleoyl group, benzoyl group, 2-methylbenzoyl group, 4-methoxybenzoyl group, 1-naphthoyl group, 2-naphthoyl group, cinnamoyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group, An isonicotinoyl group, a 9-anthroyl group, a 5-naphthacenoyl group, etc. are mentioned.

Examples of the alkoxyl group include a straight chain, branched chain, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or a group having 2 to 18 carbon atoms and interrupted by one or more —O—. Examples thereof include a chain, branched chain, monocyclic or condensed polycyclic alkoxyl group. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryloxy group include monocyclic or condensed polycyclic aryloxy groups having 6 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group, 9-fluorenyloxy group, etc. It is done.

  Examples of the heterocyclic oxy group include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furanyloxy group. 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carbazolyloxy group, 3-carbazolyloxy group , 4-carbazolyloxy group, 9-acridinyloxy group and the like.

  The acyloxy group includes a carbonyloxy group to which a hydrogen atom or a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed group having 6 to 18 carbon atoms. A carbonyloxy group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a carbonyloxy group to which a polycyclic aryl group is bonded, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; Specific examples include acetoxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, lauroyloxy group, myristoyloxy group, palmitoyloxy group, stearoyloxy group, cyclopentyl Carbonyloxy group, cyclohexylcarbonyloxy group, Crotono Ruoxy group, isocrotonoyloxy group, oleoyloxy group, benzoyloxy group, 1-naphthoyloxy group, 2-naphthoyloxy group, cinnamoyloxy group, 3-furoyloxy group, 2-thenoyloxy group, nicotinoyloxy Group, isonicotinoyloxy group, 9-anthroyloxy group, 5-naphthacenoyloxy group and the like.

  Examples of the alkylthio group include linear, branched, monocyclic or condensed polycyclic alkylthio groups having 1 to 18 carbon atoms, and specific examples include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, and a pentylthio group. Hexylthio group, octylthio group, decylthio group, dodecylthio group, octadecylthio group and the like.

  Examples of the arylthio group include monocyclic or condensed polycyclic arylthio groups having 6 to 18 carbon atoms, and specific examples thereof include a phenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, a 9-anthrylthio group, and a 9-phenanthri group. And a ruthio group.

  Examples of the heterocyclic thio group include a monocyclic or condensed polycyclic heterocyclic thio group having 4 to 18 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furylthio group. 2-thienylthio group, 2-pyrrolylthio group, 6-indolylthio group, 2-benzofurylthio group, 2-benzothienylthio group, 2-carbazolylthio group, 3-carbazolylthio group, 4-carbazolylthio group and the like.

  Examples of the alkylamino group include methylamino group, ethylamino group, propylamino group, butylamino group, pentylamino group, hexylamino group, heptylamino group, octylamino group, nonylamino group, decylamino group, dodecylamino group, octadecylamino group Group, isopropylamino group, isobutylamino group, isopentylamino group, sec-butylamino group, tert-butylamino group, sec-pentylamino group, tert-pentylamino group, tert-octylamino group, neopentylamino group, Cyclopropylamino group, cyclobutylamino group, cyclopentylamino group, cyclohexylamino group, cycloheptylamino group, cyclooctylamino group, cyclododecylamino group, 1-adamantamino group, 2-adamantamino group, etc. It is below.

  Dialkylamino group includes dimethylamino group, diethylamino group, dipropylamino group, dibutylamino group, dipentylamino group, dihexylamino group, diheptylamino group, dioctylamino group, dinonylamino group, didecylamino group, didodecylamino group, Dioctadecylamino group, diisopropylamino group, diisobutylamino group, diisopentylamino group, methylethylamino group, methylpropylamino group, methylbutylamino group, methylisobutylamino group, cyclopropylamino group, pyrrolidino group, piperidino group, And piperazino group.

  As an arylamino group, an anilino group, 1-naphthylamino group, 2-naphthylamino group, o-toluidino group, m-toluidino group, p-toluidino group, 2-biphenylamino group, 3-biphenylamino group, 4- Biphenylamino group, 1-fluoreneamino group, 2-fluoreneamino group, 2-thiazoleamino group, p-terphenylamino group and the like can be mentioned.

  Examples of the diarylamino group include a diphenylamino group, a ditolylamino group, an N-phenyl-1-naphthylamino group, and an N-phenyl-2-naphthylamino group.

  Examples of the alkylarylamino group include N-methylanilino group, N-methyl-2-pyridino group, N-ethylanilino group, N-propylanilino group, N-butylanilino group, N-isopropyl, N-pentylanilino group, N -Ethylanilino group, N-methyl-1-naphthylamino group and the like.

R ^{9 to} R ¹⁵ in the general formula (2) are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl An oxy group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic oxy group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted acyl group, a general formula ( The group represented by 3) or the group represented by the general formula (4) is represented.

The substituted or unsubstituted alkyl group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted alkyl group described for R ^{1 to} R ⁸ in the general formula (1).

The substituted or unsubstituted alkoxy group in R ⁹ to R ^15, is synonymous with a substituted or unsubstituted alkoxyl group described in R ¹ to R ⁸ of general formula (1).

The substituted or unsubstituted aryl group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted aryl group described for R ^{1 to} R ⁸ in the general formula (1).

The substituted or unsubstituted aryloxy group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted aryloxy group described for R ^{1 to} R ⁸ in the general formula (1).

The substituted or unsubstituted heterocyclic group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted heterocyclic group described for R ^{1 to} R ⁸ in the general formula (1).

The substituted or unsubstituted heterocyclic oxy group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted heterocyclic oxy group described for R ^{1 to} R ⁸ in the general formula (1).

Examples of the substituted or unsubstituted alkenyl group in R ^{9 to} R ¹⁵ include a linear, branched, monocyclic or condensed polycyclic alkenyl group having 2 to 18 carbon atoms, and these include a plurality of carbon atoms in the structure. -It may have a carbon double bond, and specific examples include vinyl group, 1-propenyl group, allyl group, 2-butenyl group, 3-butenyl group, isopropenyl group, isobutenyl group, 1-pentenyl group. 2-pentenyl group, 3-pentenyl group, 4-pentenyl group, 1-hexenyl group, 2-hexenyl group, 3-hexenyl group, 4-hexenyl group, 5-hexenyl group, cyclopentenyl group, cyclohexenyl group, 1 , 3-butadienyl group, cyclohexadienyl group, cyclopentadienyl group and the like, but are not limited thereto.

The substituted or unsubstituted alkoxycarbonyl group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted alkoxycarbonyl group described for R ^{1 to} R ⁸ in the general formula (1).

The substituted or unsubstituted acyl group in R ^{9 to} R ¹⁵ has the same meaning as the substituted or unsubstituted acyl group described for R ^{1 to} R ⁸ in the general formula (1).

Further, in R ^{9 to} R ¹⁵ , substituents other than the group represented by the general formula (3) and the group represented by the general formula (4) may form a ring with adjacent substituents.

A ¹ in the general formula (2) represents a divalent linking group.

The divalent linking group in A ¹ is a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted divalent heterocyclic group, a substituted or unsubstituted alkenylene group, Or a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted divalent heterocyclic group, or an unsubstituted alkenylene group, and -O-, -S-, -CO- Represents a divalent linking group.

The substituted or unsubstituted alkylene group in A ¹ is formed by removing one hydrogen atom from the same substituent as the substituted or unsubstituted alkyl group described for R ^{1 to} R ⁸ in formula (1). Valent groups can be mentioned, but not limited thereto.

The substituted or unsubstituted arylene group in A ¹ is formed by removing one hydrogen atom from the same substituent as the substituted or unsubstituted aryl group described for R ^{1 to} R ⁸ in the general formula (1). Valent groups can be mentioned, but not limited thereto.

The divalent heterocyclic group substituted or unsubstituted in the A ^1, 1 hydrogen atoms from the same substituents as substituted or unsubstituted heterocyclic group described in R ¹ to R ⁸ of general formula (1) Examples of the divalent group can be given, but not limited thereto.

The substituted or unsubstituted alkenylene group in A ¹ is formed by removing one hydrogen atom from the same substituent as the substituted or unsubstituted alkenyl group described for R ^{1 to} R ⁸ in the general formula (1). Valent groups can be mentioned, but not limited thereto.

Specific examples of a combination of a plurality of groups among the divalent linking groups in A ¹ are shown below, but are not limited thereto.

R ^{9 to} R ¹⁵ and A ¹ described above may be further substituted with other substituents. Examples of such other substituents include a hydroxyl group, a carboxyl group, a sulfone group, a sulfonyl chloride group, and an amide group. , a cyano group, a nitro group, c androgenic atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyloxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, Amino group, alkylamino group, dialkylamino group, arylamino group, diarylamino group, alkylarylamino group, benzylamino group, dibenzylamino group and the like can be mentioned.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the alkyl group include a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or a linear chain having 2 to 18 carbon atoms and interrupted by one or more —O—. , Branched, monocyclic or condensed polycyclic alkyl groups. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. _{2 -CH 3 -, - CH 2} -CH- (OCH 3) 2 , and the like.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryl group include monocyclic or condensed polycyclic aryl groups having 6 to 18 carbon atoms. Specific examples include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, Examples include 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 9-fluorenyl group and the like.

  Examples of the heterocyclic group include a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include a 2-furanyl group, 2 -Thienyl group, 2-indolyl group, 3-indolyl group, 2-benzofuryl group, 2-benzothienyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, 9-acridinyl group and the like can be mentioned.

  The acyl group includes a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed polyvalent group having 6 to 18 carbon atoms. Examples include a carbonyl group to which a cyclic aryl group is bonded, a carbonyl group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. It may have an unsaturated bond, and specific examples thereof include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristoyl group, palmitoyl group , Stearoyl group, cyclopentylcarbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, crotonoy Group, isocrotonoyl group, oleoyl group, benzoyl group, 2-methylbenzoyl group, 4-methoxybenzoyl group, 1-naphthoyl group, 2-naphthoyl group, cinnamoyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group, An isonicotinoyl group, a 9-anthroyl group, a 5-naphthacenoyl group, etc. are mentioned.

Examples of the alkoxyl group include a straight chain, branched chain, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or a group having 2 to 18 carbon atoms and interrupted by one or more —O—. Examples thereof include a chain, branched chain, monocyclic or condensed polycyclic alkoxyl group. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryloxy group include monocyclic or condensed polycyclic aryloxy groups having 6 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group, 9-fluorenyloxy group, etc. It is done.

  Examples of the heterocyclic oxy group include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furanyloxy group. 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carbazolyloxy group, 3-carbazolyloxy group , 4-carbazolyloxy group, 9-acridinyloxy group and the like.

  The acyloxy group includes a carbonyloxy group to which a hydrogen atom or a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed group having 6 to 18 carbon atoms. A carbonyloxy group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a carbonyloxy group to which a polycyclic aryl group is bonded, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; Specific examples include acetoxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, lauroyloxy group, myristoyloxy group, palmitoyloxy group, stearoyloxy group, cyclopentyl Carbonyloxy group, cyclohexylcarbonyloxy group, Crotono Ruoxy group, isocrotonoyloxy group, oleoyloxy group, benzoyloxy group, 1-naphthoyloxy group, 2-naphthoyloxy group, cinnamoyloxy group, 3-furoyloxy group, 2-thenoyloxy group, nicotinoyloxy Group, isonicotinoyloxy group, 9-anthroyloxy group, 5-naphthacenoyloxy group and the like.

  Examples of the alkylthio group include linear, branched, monocyclic or condensed polycyclic alkylthio groups having 1 to 18 carbon atoms, and specific examples include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, and a pentylthio group. Hexylthio group, octylthio group, decylthio group, dodecylthio group, octadecylthio group and the like.

  Examples of the arylthio group include monocyclic or condensed polycyclic arylthio groups having 6 to 18 carbon atoms, and specific examples thereof include a phenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, a 9-anthrylthio group, and a 9-phenanthri group. And a ruthio group.

  Examples of the heterocyclic thio group include a monocyclic or condensed polycyclic heterocyclic thio group having 4 to 18 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furylthio group. 2-thienylthio group, 2-pyrrolylthio group, 6-indolylthio group, 2-benzofurylthio group, 2-benzothienylthio group, 2-carbazolylthio group, 3-carbazolylthio group, 4-carbazolylthio group and the like.

  Examples of the alkylamino group include methylamino group, ethylamino group, propylamino group, butylamino group, pentylamino group, hexylamino group, heptylamino group, octylamino group, nonylamino group, decylamino group, dodecylamino group, octadecylamino group Group, isopropylamino group, isobutylamino group, isopentylamino group, sec-butylamino group, tert-butylamino group, sec-pentylamino group, tert-pentylamino group, tert-octylamino group, neopentylamino group, Cyclopropylamino group, cyclobutylamino group, cyclopentylamino group, cyclohexylamino group, cycloheptylamino group, cyclooctylamino group, cyclododecylamino group, 1-adamantamino group, 2-adamantamino group, etc. It is below.

  Dialkylamino group includes dimethylamino group, diethylamino group, dipropylamino group, dibutylamino group, dipentylamino group, dihexylamino group, diheptylamino group, dioctylamino group, dinonylamino group, didecylamino group, didodecylamino group, Dioctadecylamino group, diisopropylamino group, diisobutylamino group, diisopentylamino group, methylethylamino group, methylpropylamino group, methylbutylamino group, methylisobutylamino group, cyclopropylamino group, pyrrolidino group, piperidino group, And piperazino group.

  As an arylamino group, an anilino group, 1-naphthylamino group, 2-naphthylamino group, o-toluidino group, m-toluidino group, p-toluidino group, 2-biphenylamino group, 3-biphenylamino group, 4- Biphenylamino group, 1-fluoreneamino group, 2-fluoreneamino group, 2-thiazoleamino group, p-terphenylamino group and the like can be mentioned.

  Examples of the diarylamino group include a diphenylamino group, a ditolylamino group, an N-phenyl-1-naphthylamino group, and an N-phenyl-2-naphthylamino group.

  Examples of the alkylarylamino group include N-methylanilino group, N-methyl-2-pyridino group, N-ethylanilino group, N-propylanilino group, N-butylanilino group, N-isopropyl, N-pentylanilino group, N -Ethylanilino group, N-methyl-1-naphthylamino group and the like.

R ¹⁶ in the general formula (3) represents a substituted or unsubstituted alkyl group .

The substituted or unsubstituted alkyl group for R ¹⁶ has the same meaning as the substituted or unsubstituted alkyl group described for R ^{1 to} R ⁸ in formula (1).

R ¹⁶ described above may be further substituted with other substituents. Examples of such other substituents include a hydroxyl group, a carboxyl group, a sulfone group, a sulfonyl chloride group, an amide group, a cyano group, and a nitro group. Ha androgenic atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyloxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, an amino group, an alkylamino group , Dialkylamino group, arylamino group, diarylamino group, alkylarylamino group, benzylamino group, dibenzylamino group and the like.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the alkyl group include a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or a linear chain having 2 to 18 carbon atoms and interrupted by one or more —O—. , Branched, monocyclic or condensed polycyclic alkyl groups. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. _{2 -CH 3 -, - CH 2} -CH- (OCH 3) 2 , and the like.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryl group include monocyclic or condensed polycyclic aryl groups having 6 to 18 carbon atoms. Specific examples include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, Examples include 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 9-fluorenyl group and the like.

  Examples of the heterocyclic group include a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include a 2-furanyl group, 2 -Thienyl group, 2-indolyl group, 3-indolyl group, 2-benzofuryl group, 2-benzothienyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, 9-acridinyl group and the like can be mentioned.

  The acyl group includes a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed polyvalent group having 6 to 18 carbon atoms. Examples include a carbonyl group to which a cyclic aryl group is bonded, a carbonyl group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. It may have an unsaturated bond, and specific examples thereof include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristoyl group, palmitoyl group , Stearoyl group, cyclopentylcarbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, crotonoy Group, isocrotonoyl group, oleoyl group, benzoyl group, 2-methylbenzoyl group, 4-methoxybenzoyl group, 1-naphthoyl group, 2-naphthoyl group, cinnamoyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group, An isonicotinoyl group, a 9-anthroyl group, a 5-naphthacenoyl group, etc. are mentioned.

Examples of the alkoxyl group include a straight chain, branched chain, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or a group having 2 to 18 carbon atoms and interrupted by one or more —O—. Examples thereof include a chain, branched chain, monocyclic or condensed polycyclic alkoxyl group. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryloxy group include monocyclic or condensed polycyclic aryloxy groups having 6 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group, 9-fluorenyloxy group, etc. It is done.

  Examples of the heterocyclic oxy group include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furanyloxy group. 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carbazolyloxy group, 3-carbazolyloxy group , 4-carbazolyloxy group, 9-acridinyloxy group and the like.

  The acyloxy group includes a carbonyloxy group to which a hydrogen atom or a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed group having 6 to 18 carbon atoms. A carbonyloxy group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a carbonyloxy group to which a polycyclic aryl group is bonded, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; Specific examples include acetoxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, lauroyloxy group, myristoyloxy group, palmitoyloxy group, stearoyloxy group, cyclopentyl Carbonyloxy group, cyclohexylcarbonyloxy group, Crotono Ruoxy group, isocrotonoyloxy group, oleoyloxy group, benzoyloxy group, 1-naphthoyloxy group, 2-naphthoyloxy group, cinnamoyloxy group, 3-furoyloxy group, 2-thenoyloxy group, nicotinoyloxy Group, isonicotinoyloxy group, 9-anthroyloxy group, 5-naphthacenoyloxy group and the like.

  Examples of the alkylthio group include linear, branched, monocyclic or condensed polycyclic alkylthio groups having 1 to 18 carbon atoms, and specific examples include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, and a pentylthio group. Hexylthio group, octylthio group, decylthio group, dodecylthio group, octadecylthio group and the like.

  Examples of the arylthio group include monocyclic or condensed polycyclic arylthio groups having 6 to 18 carbon atoms, and specific examples thereof include a phenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, a 9-anthrylthio group, and a 9-phenanthri group. And a ruthio group.

  Examples of the heterocyclic thio group include a monocyclic or condensed polycyclic heterocyclic thio group having 4 to 18 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furylthio group. 2-thienylthio group, 2-pyrrolylthio group, 6-indolylthio group, 2-benzofurylthio group, 2-benzothienylthio group, 2-carbazolylthio group, 3-carbazolylthio group, 4-carbazolylthio group and the like.

  Examples of the alkylamino group include methylamino group, ethylamino group, propylamino group, butylamino group, pentylamino group, hexylamino group, heptylamino group, octylamino group, nonylamino group, decylamino group, dodecylamino group, octadecylamino group Group, isopropylamino group, isobutylamino group, isopentylamino group, sec-butylamino group, tert-butylamino group, sec-pentylamino group, tert-pentylamino group, tert-octylamino group, neopentylamino group, Cyclopropylamino group, cyclobutylamino group, cyclopentylamino group, cyclohexylamino group, cycloheptylamino group, cyclooctylamino group, cyclododecylamino group, 1-adamantamino group, 2-adamantamino group, etc. It is below.

  Dialkylamino group includes dimethylamino group, diethylamino group, dipropylamino group, dibutylamino group, dipentylamino group, dihexylamino group, diheptylamino group, dioctylamino group, dinonylamino group, didecylamino group, didodecylamino group, Dioctadecylamino group, diisopropylamino group, diisobutylamino group, diisopentylamino group, methylethylamino group, methylpropylamino group, methylbutylamino group, methylisobutylamino group, cyclopropylamino group, pyrrolidino group, piperidino group, And piperazino group.

  As an arylamino group, an anilino group, 1-naphthylamino group, 2-naphthylamino group, o-toluidino group, m-toluidino group, p-toluidino group, 2-biphenylamino group, 3-biphenylamino group, 4- Biphenylamino group, 1-fluoreneamino group, 2-fluoreneamino group, 2-thiazoleamino group, p-terphenylamino group and the like can be mentioned.

  Examples of the diarylamino group include a diphenylamino group, a ditolylamino group, an N-phenyl-1-naphthylamino group, and an N-phenyl-2-naphthylamino group.

  Examples of the alkylarylamino group include N-methylanilino group, N-methyl-2-pyridino group, N-ethylanilino group, N-propylanilino group, N-butylanilino group, N-isopropyl, N-pentylanilino group, N -Ethylanilino group, N-methyl-1-naphthylamino group and the like.

R ¹⁷ in the general formula (4) represents a substituted or unsubstituted alkyl group .

The substituted or unsubstituted alkyl group for R ¹⁷ has the same meaning as the substituted or unsubstituted alkyl group described for R ^{1 to} R ⁸ in formula (1).

A ² in the general formula (4) represents a divalent linking group.

The divalent linking group in A ² has the same meaning as the divalent linking group described in A ¹ .

R ¹⁷ and A ² described above may be further substituted with other substituents. Examples of such other substituents include a hydroxyl group, a carboxyl group, a sulfone group, a sulfonyl chloride group, an amide group, and a cyano group. , nitro group, c androgenic atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxyl group, an aryloxy group, a heterocyclic oxy group, an acyloxy group, an alkylthio group, an arylthio group, a heterocyclic thio group, an amino group, Examples include an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, an alkylarylamino group, a benzylamino group, and a dibenzylamino group.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the alkyl group include a linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms, or a linear chain having 2 to 18 carbon atoms and interrupted by one or more —O—. , Branched, monocyclic or condensed polycyclic alkyl groups. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkyl group having 1 to 18 carbon atoms include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group. Group, nonyl group, decyl group, dodecyl group, octadecyl group, isopropyl group, isobutyl group, isopentyl group, sec-butyl group, tert-butyl group, sec-pentyl group, tert-pentyl group, tert-octyl group, neopentyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, boronyl group, 4-decylcyclohexyl group and the like. Specific examples of the linear or branched alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —CH ₂ —O—CH ₃ and —CH ₂ —CH. _2— O—CH ₂ —CH ₃ , —CH ₂ —CH ₂ —CH ₂ —O—CH ₂ —CH ₃ , — (CH ₂ —CH ₂ —O) _n1 —CH ₃ (where n1 is 1 to 8) ), — (CH ₂ —CH ₂ —CH ₂ —O) _m1 —CH ₃ (where m1 is an integer of 1 to 5), —CH ₂ —CH (CH ₃ ) —O—CH. _{2 -CH 3 -, - CH 2} -CH- (OCH 3) 2 , and the like.

  Specific examples of the monocyclic or condensed polycyclic alkyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryl group include monocyclic or condensed polycyclic aryl groups having 6 to 18 carbon atoms. Specific examples include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, Examples include 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 1-acenaphthyl group, 9-fluorenyl group and the like.

  Examples of the heterocyclic group include a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. Specific examples include a 2-furanyl group, 2 -Thienyl group, 2-indolyl group, 3-indolyl group, 2-benzofuryl group, 2-benzothienyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, 9-acridinyl group and the like can be mentioned.

  The acyl group includes a hydrogen atom, a carbonyl group to which a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed polyvalent group having 6 to 18 carbon atoms. Examples include a carbonyl group to which a cyclic aryl group is bonded, a carbonyl group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom. It may have an unsaturated bond, and specific examples thereof include formyl group, acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristoyl group, palmitoyl group , Stearoyl group, cyclopentylcarbonyl group, cyclohexylcarbonyl group, acryloyl group, methacryloyl group, crotonoy Group, isocrotonoyl group, oleoyl group, benzoyl group, 2-methylbenzoyl group, 4-methoxybenzoyl group, 1-naphthoyl group, 2-naphthoyl group, cinnamoyl group, 3-furoyl group, 2-thenoyl group, nicotinoyl group, An isonicotinoyl group, a 9-anthroyl group, a 5-naphthacenoyl group, etc. are mentioned.

Examples of the alkoxyl group include a straight chain, branched chain, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms, or a group having 2 to 18 carbon atoms and interrupted by one or more —O—. Examples thereof include a chain, branched chain, monocyclic or condensed polycyclic alkoxyl group. Specific examples of the linear, branched, monocyclic or condensed polycyclic alkoxyl group having 1 to 18 carbon atoms include methoxy group, ethoxy group, propoxy group, butoxy group, pentyloxy group, hexyloxy group, heptyl Oxy group, octyloxy group, nonyloxy group, decyloxy group, dodecyloxy group, octadecyloxy group, isopropoxy group, isobutoxy group, isopentyloxy group, sec-butoxy group, tert-butoxy group, sec-pentyloxy group, tert -Pentyloxy group, tert-octyloxy group, neopentyloxy group, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, adamantyloxy group, norbornyloxy group, boronyloxy group, 4-decyl Cyclohexyl It can be given group and the like, but not limited thereto. Specific examples of the linear or branched alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include —O—CH ₂ —O—CH ₃ , —O—. _{CH 2 -CH 2 -O-CH 2} -CH 3, -O-CH 2 -CH 2 -CH 2 -O-CH 2 -CH 3, -O- (CH 2 -CH 2 -O) n2 -CH 3 (Where n2 is an integer from 1 to 8), —O— (CH ₂ —CH ₂ —CH ₂ —O) _m2 —CH ₃ (where m2 is an integer from 1 to 5), —O— _{CH 2 -CH (CH 3) -O} -CH 2 -CH 3 -, - OCH 2 -CH- (OCH 3) can be cited _2, etc., but is not limited thereto.

  Specific examples of the monocyclic or condensed polycyclic alkoxyl group having 2 to 18 carbon atoms and interrupted by one or more —O— include the following.

  Examples of the aryloxy group include monocyclic or condensed polycyclic aryloxy groups having 6 to 18 carbon atoms. Specific examples include a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a 9-anthryloxy group, 9-phenanthryloxy group, 1-pyrenyloxy group, 5-naphthacenyloxy group, 1-indenyloxy group, 2-azurenyloxy group, 1-acenaphthyloxy group, 9-fluorenyloxy group, etc. It is done.

  Examples of the heterocyclic oxy group include a monocyclic or condensed polycyclic heterocyclic oxy group having 4 to 18 carbon atoms, including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furanyloxy group. 2-thienyloxy group, 2-indolyloxy group, 3-indolyloxy group, 2-benzofuryloxy group, 2-benzothienyloxy group, 2-carbazolyloxy group, 3-carbazolyloxy group , 4-carbazolyloxy group, 9-acridinyloxy group and the like.

  The acyloxy group includes a carbonyloxy group to which a hydrogen atom or a linear, branched, monocyclic or condensed polycyclic aliphatic group having 1 to 18 carbon atoms is bonded, or a monocyclic or condensed group having 6 to 18 carbon atoms. A carbonyloxy group to which a monocyclic or condensed polycyclic heterocyclic group having 4 to 18 carbon atoms is bonded, including a carbonyloxy group to which a polycyclic aryl group is bonded, a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; Specific examples include acetoxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, lauroyloxy group, myristoyloxy group, palmitoyloxy group, stearoyloxy group, cyclopentyl Carbonyloxy group, cyclohexylcarbonyloxy group, Crotono Ruoxy group, isocrotonoyloxy group, oleoyloxy group, benzoyloxy group, 1-naphthoyloxy group, 2-naphthoyloxy group, cinnamoyloxy group, 3-furoyloxy group, 2-thenoyloxy group, nicotinoyloxy Group, isonicotinoyloxy group, 9-anthroyloxy group, 5-naphthacenoyloxy group and the like.

  Examples of the alkylthio group include linear, branched, monocyclic or condensed polycyclic alkylthio groups having 1 to 18 carbon atoms, and specific examples include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, and a pentylthio group. Hexylthio group, octylthio group, decylthio group, dodecylthio group, octadecylthio group and the like.

  Examples of the arylthio group include monocyclic or condensed polycyclic arylthio groups having 6 to 18 carbon atoms, and specific examples thereof include a phenylthio group, a 1-naphthylthio group, a 2-naphthylthio group, a 9-anthrylthio group, and a 9-phenanthri group. And a ruthio group.

  Examples of the heterocyclic thio group include a monocyclic or condensed polycyclic heterocyclic thio group having 4 to 18 carbon atoms including a nitrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom, and specific examples include a 2-furylthio group. 2-thienylthio group, 2-pyrrolylthio group, 6-indolylthio group, 2-benzofurylthio group, 2-benzothienylthio group, 2-carbazolylthio group, 3-carbazolylthio group, 4-carbazolylthio group and the like.

  Examples of the alkylamino group include methylamino group, ethylamino group, propylamino group, butylamino group, pentylamino group, hexylamino group, heptylamino group, octylamino group, nonylamino group, decylamino group, dodecylamino group, octadecylamino group Group, isopropylamino group, isobutylamino group, isopentylamino group, sec-butylamino group, tert-butylamino group, sec-pentylamino group, tert-pentylamino group, tert-octylamino group, neopentylamino group, Cyclopropylamino group, cyclobutylamino group, cyclopentylamino group, cyclohexylamino group, cycloheptylamino group, cyclooctylamino group, cyclododecylamino group, 1-adamantamino group, 2-adamantamino group, etc. It is below.

  Dialkylamino group includes dimethylamino group, diethylamino group, dipropylamino group, dibutylamino group, dipentylamino group, dihexylamino group, diheptylamino group, dioctylamino group, dinonylamino group, didecylamino group, didodecylamino group, Dioctadecylamino group, diisopropylamino group, diisobutylamino group, diisopentylamino group, methylethylamino group, methylpropylamino group, methylbutylamino group, methylisobutylamino group, cyclopropylamino group, pyrrolidino group, piperidino group, And piperazino group.

  As an arylamino group, an anilino group, 1-naphthylamino group, 2-naphthylamino group, o-toluidino group, m-toluidino group, p-toluidino group, 2-biphenylamino group, 3-biphenylamino group, 4- Biphenylamino group, 1-fluoreneamino group, 2-fluoreneamino group, 2-thiazoleamino group, p-terphenylamino group and the like can be mentioned.

  Examples of the diarylamino group include a diphenylamino group, a ditolylamino group, an N-phenyl-1-naphthylamino group, and an N-phenyl-2-naphthylamino group.

  Examples of the alkylarylamino group include N-methylanilino group, N-methyl-2-pyridino group, N-ethylanilino group, N-propylanilino group, N-butylanilino group, N-isopropyl, N-pentylanilino group, N -Ethylanilino group, N-methyl-1-naphthylamino group and the like.

  Specific examples of particularly preferred photopolymerization initiators described above are shown below, but the structure of the photopolymerization initiator of the present invention is not limited thereto.

  The synthesis method for obtaining the photopolymerization initiator of the present invention is not particularly limited, and the structure can be easily synthesized and confirmed by appropriately combining conventionally known chemical reactions, post-treatment methods, purification methods and analysis methods. Is possible. Methods for synthesizing thioxanthone derivatives are disclosed in JP-A-56-125383, JP-A-58-79991, JP-A-7-10829, European Patent No. 81280, or West German Patent No. 2504642. The photopolymerization initiator of the present invention can be synthesized by appropriately replacing the raw materials used in the synthesis described in the above.

  The photopolymerization initiator of the present invention has a specific structure in which at least one carbonyloxy group is introduced with respect to thioxanthone, so that compared with a conventionally known thioxanthone derivative, polymerization by radicals generated by the photopolymerization initiator is performed. It is possible to reliably cure photocurable inkjet inks in a shorter time, such as reaction and crosslinking reaction, and to suppress bleeding and volatilization of photopolymerization initiator that occurs from the cured ink, and coloring that occurs after ink curing Is possible. The photocurable ink-jet ink containing the photopolymerization initiator of the present invention will be described below.

  The photopolymerization initiator of the present invention is used in the photocurable inkjet ink in an amount of 0.1 to 20% by weight, preferably 1 to 12% by weight.

  The monomer in the photocurable inkjet ink of the present invention is a monomer having an ethylenically unsaturated bond capable of radical polymerization, and the monomer having an ethylenically unsaturated bond capable of radical polymerization is capable of radical polymerization in the molecule. Any monomer having at least one ethylenically unsaturated bond may be used. These may be used alone or may be a system in which two or more kinds are mixed at an arbitrary ratio in order to improve the intended characteristics.

  Specific examples of monomers used in the present invention include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and ethoxylation. 1,6-hexanediol diacrylate, neopentyl glycol di (meth) acrylate, ethoxylated neopentyl glycol di (meth) acrylate, propoxylated neopentyl glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polypropylene Glycol diacrylate, 1,4-butanediol di (meth) acrylate, 1,9-nonanediol diacrylate, tetraethylene glycol diacrylate, 2-n-butyl-2- Chill-1,3-propanediol diacrylate, dimethylol-tricyclodecane diacrylate, hydroxypivalic acid neopentyl glycol diacrylate, 1,3-butylene glycol di (meth) acrylate, ethoxylated bisphenol A di (meth) acrylate , Propoxylated bisphenol A di (meth) acrylate, cyclohexanedimethanol di (meth) acrylate, dimethylol dicyclopentane diacrylate, trimethylolpropane triacrylate, hydroxypivalic acid trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate , Propoxylated trimethylolpropane triacrylate, ethoxylated phosphate triacrylate, ethoxylated tripropylene glycol Diacrylate, neopentyl glycol modified trimethylolpropane diacrylate, stearic acid modified pentaerythritol diacrylate, pentaerythritol triacrylate, tetramethylolpropane triacrylate, tetramethylol methane triacrylate, pentaerythritol tetraacrylate, caprolactone modified trimethylolpropane triacrylate , Ethoxylated isocyanuric acid triacrylate, tri (2-hydroxyethyl isocyanurate) triacrylate, propoxylate glyceryl triacrylate, tetramethylol methane tetraacrylate, pentaerythritol tetraacrylate, ditrimethylolpropane tetraacrylate, ethoxylated pentaerythritol tetraacrylate Relate, dipentaerythritol hexaacrylate, caprolactone-modified dipentaerythritol hexaacrylate, dipentaerythritol hydroxypentaacrylate, neopentyl glycol oligoacrylate, 1,4-butanediol oligoacrylate, 1,6-hexanediol oligoacrylate, trimethylolpropane Oligoacrylate, pentaerythritol oligoacrylate, 2-phenoxyethyl acrylate, acryloylmorpholine, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, isobornyl Acrylate, cyclohexyl acrylate, 2 Methoxyethyl acrylate, methoxytriethylene glycol acrylate, 2-ethoxyethyl acrylate, tetrahydrofurfuryl acrylate, 3-methoxybutyl acrylate, benzyl acrylate, ethoxyethoxyethyl acrylate, butoxyethyl acrylate, ethoxydiethylene glycol acrylate, methoxydipropylene glycol acrylate, methyl Phenoxyethyl acrylate, dipropylene glycol acrylate, β-carboxyl ethyl acrylate, phenoxy diethylene glycol acrylate, vinyl caprolactam, vinyl pyrrolidone, N-vinyl formamide, ethyl diglycol acrylate, trimethylolpropane formal monoacrylate, 4-t-butylcyclohex Acrylate, tri (meth) allyl isocyanurate, imide acrylate, isoamyl acrylate, ethoxylated succinic acid acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, tribromophenyl acrylate, ethoxylated tribromophenyl acrylate, trifluoroethyl acrylate, ω-carboxyl Examples include polycaprolactone monoacrylate. Furthermore, edited by Shinzo Yamashita et al., "Crosslinking agent handbook" (1981, Taiseisha), Kiyoto Kato, "UV / EB curing handbook (raw material)", (1985, Polymer publication society), Radtech. Study Group, “Application and Market of UV / EB Curing Technology”, Item 79, (1989, CMC), Akamatsu Kiyoshi, “Practical Technology of New Photosensitive Resin”, (1987, CMC), Commercially available products described in Teiyama Soichiro's "Polyester Resin Handbook" (1988, Nikkan Kogyo Shimbun) or radically polymerizable or crosslinkable monomers known in the industry can be mentioned, but the present invention is limited to these. is not.

  The monomer of the present invention is used in the range of 30 to 90% by weight in the photocurable inkjet ink.

  In addition to the above monomers, what is called an oligomer or prepolymer can be used for the photocurable inkjet ink of the present invention. Specifically, “Ebecryl 230, 244, 245, 270, 280 / 15IB, 284, 285, 4830, 4835, 4858, 4883, 8402, 8803, 8800, 254, 264, 265, 294 / 35HD, manufactured by Daicel UCB, 1259, 1264, 4866, 9260, 8210, 1290.1290K, 5129, 2000, 2001, 2002, 2100, KRM7222, KRM7735, 4842, 210, 215, 4827, 4849, 6700, 6700-20T, 204, 205, 6602, 220, 4450, 770, IRR567, 81, 84, 83, 80, 657, 800, 805, 808, 810, 812, 1657, 1810, IRR302, 450, 670, 830, 835, 870, 1 30, 1870, 2870, IRR267, 813, IRR483, 811, 436, 438, 446, 505, 524, 525, 554W, 584, 586, 745, 767, 1701, 1755, 740 / 40TP, 600, 601, 604, 605, 607, 608, 609, 600 / 25TO, 616, 645, 648, 860, 1606, 1608, 1629, 1940, 2958, 2959, 3200, 3201, 3404, 3411, 3412, 3415, 3500, 3502, 3600, 3603, 3604, 3605, 3608, 3700, 3700-20H, 3700-20T, 3700-25R, 3701, 3701-20T, 3703, 3702, RDX63182, 6040, IRR419 ", manufactured by Sartomer CN104, CN120, CN124, CN136, CN151, CN2270, CN2271E, CN435, CN454, CN970, CN971, CN972, CN9782, CN981, CN9873, CN991, "Laromar EA81L, F87" manufactured by BASF LR8800, PE46T, LR8907, PO43F, PO77F, PE55F, LR8967, LR8981, LR8982, LR8992, LR9004, LR8956, LR8985, LR8987, UP35D, UA19T, LR9005, PO83F, PO33F, L8489, L9489 LR8996, LR9013 LR9019, PO9026V, PE9027V "manufactured by Cognis" Photomer 3005, 3015, 3016, 3072, 3982, 3215, 5010, 5429, 5430, 5432, 5662, 5806, 5930, 6008, 6010, 6019, 6184, 6210, 6217, 6230, 6891, 6892, 6893-20R, 6363, 6572, 3660 "," Art Resin UN-9000HP, 9000PEP, 9200A, 7600, 5200, 1003, 1255, 3320HA, 3320HB, 3320HC, 3320HS, 901T, manufactured by Negami Kogyo Co., Ltd. 1200TPK, 6060PTM, 6060P "," Nippon Gosei Chemical Co., Ltd. "" purple light UV-6630B, 7000B, 7510B, 7461TE, 3000B, 320 " 0B, 3210EA, 3310B, 3500BA, 3520TL, 3700B, 6100B, 6640B, 1400B, 1700B, 6300B, 7550B, 7605B, 7610B, 7620EA, 7630B, 7640B, 2000B, 2010B, 2250EA, 2750B, “Kayarad” R-280, R-146, R131, R-205, EX2320, R190, R130, R-300, C-0011, TCR-1234, ZFR-1122, UX-2201, UX-2301, UX3204, UX-3301, UX-4101, UX-6101, UX-7101, MAX-5101, MAX-5100, MAX-3510, UX-4101 "and the like.

  Examples of the pigment of the photocurable inkjet ink used in the present invention include pigments conventionally used in inkjet inks, such as achromatic pigments such as carbon black, titanium oxide, and calcium carbonate, or chromatic organic pigments. It is done. These may be used alone or may be a system in which two or more kinds are mixed at an arbitrary ratio in order to improve the properties for the purpose of adjusting hue and density.

  Specific organic pigments include insoluble azo pigments such as Toluidine Red, Toluidine Maroon, Hansa Yellow, Benzidine Yellow, and Pyrazolone Red, soluble azo pigments such as Ritolol Red, Helio Bordeaux, Pigment Scarlet, and Permanent Red 2B, Alizarin, Indantron Derivatives from vat dyes such as thioindigo maroon, phthalocyanine organic pigments such as phthalocyanine blue and phthalocyanine green, quinacridone organic pigments such as quinacridone red and quinacridone magenta, perylene organic pigments such as perylene red and perylene scarlet, Isoindolinone organic pigments such as indolinone yellow and isoindolinone orange, and pyranthrone organic pigments such as pyranthrone red and pyranthrone orange Thioindigo organic pigments, condensed azo organic pigments, benzimidazolone organic pigments, quinophthalone organic pigments such as quinophthalone yellow, isoindoline organic pigments such as isoindoline yellow, and other pigments such as flavanthron yellow and acylamide yellow And publicly known various pigments such as nickel azo yellow, copper azomethine yellow, perinone orange, anthrone orange, dianthraquinonyl red, and dioxazine violet.

  When organic pigments are exemplified by color index (C.I.) numbers, CI pigment yellows 12, 13, 14, 17, 20, 24, 74, 83, 8893, 109, 110, 117, 120, 125 128, 129, 137, 138, 139, 147, 148, 150, 151, 153, 154, 155, 166, 168, 180, 185, CI Pigment Orange 16, 36, 43, 51, 55, 59, 61, CI Pigment Red 9, 48, 49, 52, 53, 57, 97, 122, 123, 149, 168, 177, 180, 192, 202, 206, 215, 216, 217, 220, 223, 224, 226, 227, 228, 238, 240, CI Pigment Violet 19, 23, 29, 30, 37, 40, 50, CI Pig Blue 15, 15: 1, 15: 3, 15: 4, 15: 6, 22, 60, 64, CI Pigment Green 7, 36, CI Pigment Brown 23, 25, 26, etc. .

  Specific examples of carbon black include “Special Black 350, 250, 100, 550, 5, 4, 4A, 6” “Printex U, V, 140 U, 140 V, 95, 90, 85, 80, 75, 55, manufactured by Degussa. 45, 40, P, 60, L6, L, 300, 30, 3, 35, 25, A, G ", Cabot's" REGAL 400R, 660R, 330R, 250R "," MOGUL E, L ", Mitsubishi Chemical “MA7, 8, 11, 77, 100, 100R, 100S, 220, 230” “# 2700, # 2650, # 2600, # 200, # 2350, # 2300, # 2200, # 1000, # 990, # 980, # 970, # 960, # 950, # 900, # 850, # 750, # 650, # 52, # 50, # 47, # 45, # 4 5L, # 44, # 40, # 33, # 332, # 30, # 25, # 20, # 10, # 5, CF9, # 95, # 260 ”and the like.

  Specific examples of titanium oxide include “Taipeku CR-50, 50-2, 57, 80, 90, 93, 95, 953, 97, 60, 60-2, 63, 67, 58, 58- manufactured by Ishihara Sangyo Co., Ltd. 2, 85 "" Tipekes R-820, 830, 930, 550, 630, 680, 670, 580, 780, 780-2, 850, 855 "," Tipekes A-100, 220 "," Tipekes W-10 "," Tipekes " PF-740, 744 "" TTO-55 (A), 55 (B), 55 (C), 55 (D), 55 (S), 55 (N), 51 (A), 51 (C) " "TTO-S-1, 2", "TTO-M-1, 2", "Titanics JR-301, 403, 405, 600A, 605, 600E, 603, 805, 806, 701, 800, 808" manufactured by Teika "Titanic EN-1, C, 3, 4, 5 ", DuPont" Taipyua R-900,902,960,706,931 ', and the like.

  Among the above pigments, quinacridone organic pigments, phthalocyanine organic pigments, benzimidazolone organic pigments, isoindolinone organic pigments, condensed azo organic pigments, quinophthalone organic pigments, isoindoline organic pigments, etc. are light-resistant. Is preferable because it is excellent. The organic pigment is preferably a fine pigment having an average particle diameter of 10 to 150 nm as measured by laser scattering. When the average particle diameter of the pigment is less than 10 nm, the light resistance is lowered due to the small particle diameter, and when it exceeds 150 nm, it is difficult to maintain stable dispersion, and the pigment is likely to precipitate.

  The organic pigment can be refined by the following method. That is, a mixture comprising at least three components of an organic pigment, a water-soluble inorganic salt that is at least 3 times the weight of the organic pigment, and a water-soluble solvent is made into a clay-like mixture, and is kneaded strongly with a kneader or the like and then refined. And stirred with a high speed mixer or the like to form a slurry. Next, filtration and washing of the slurry are repeated to remove the water-soluble inorganic salt and the water-soluble solvent. In the miniaturization step, a resin, a pigment dispersant and the like may be added.

  Examples of the water-soluble inorganic salt include sodium chloride and potassium chloride. These inorganic salts are preferably used in the range of 3 to 20 parts by weight per 1 part by weight of the organic pigment. When the amount of the inorganic salt is less than 3 parts by weight with respect to 1 part by weight of the organic pigment, a treated pigment having a desired size cannot be obtained. On the other hand, if the amount is more than 20 parts by weight, the washing process in the subsequent process is great, and the substantial amount of the organic pigment is reduced.

  The water-soluble solvent is an organic solvent and a water-soluble inorganic salt that is used as a crushing aid, and is used for efficient crushing efficiently, especially if it is a solvent that dissolves in water. Although not limited, a high boiling point solvent having a boiling point of 120 to 250 ° C. is preferable from the viewpoint of safety because the temperature rises during kneading and the solvent is easily evaporated. Examples of water-soluble solvents include 2- (methoxymethoxy) ethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, diethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether , Triethylene glycol, triethylene glycol monomethyl ether, liquid polyethylene glycol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, low molecular weight Examples thereof include polypropylene glycol.

  The pigment of the present invention is used in the range of 1 to 40% by weight in the photocurable inkjet ink in order to obtain a sufficient concentration and sufficient light resistance.

  In the present invention, it is preferable to add a pigment dispersant in order to improve the dispersibility of the pigment and the storage stability of the ink. Examples of the pigment dispersant include a hydroxyl group-containing carboxylic acid ester, a salt of a long chain polyaminoamide and a high molecular weight acid ester, a salt of a high molecular weight polycarboxylic acid, a salt of a long chain polyaminoamide and a polar acid ester, a high molecular weight unsaturated acid ester, Polymer copolymer, modified polyurethane, modified polyacrylate, polyether ester type anionic activator, naphthalene sulfonic acid formalin condensate salt, aromatic sulfonic acid formalin condensate salt, polyoxyethylene alkyl phosphate ester, polyoxyethylene Nonylphenyl ether, stearylamine acetate, etc. can be used.

  Specific examples of the dispersant include “Anti-Terra-U (polyaminoamide phosphate)”, “Anti-Terra-203 / 204 (high molecular weight polycarboxylate)”, “Disperbyk-101” (polyamino) manufactured by BYK Chemie. Amide phosphate and acid ester), 107 (hydroxyl group-containing carboxylic acid ester), 110, 111 (copolymer containing acid group), 130 (polyamide), 161, 162, 163, 164, 165, 166, 170 (high Molecular copolymer) ”,“ 400 ”,“ Bykumen ”(high molecular weight unsaturated acid ester),“ BYK-P104, P105 (high molecular weight unsaturated acid polycarboxylic acid) ”,“ P104S, 240S (high molecular weight unsaturated) Acid polycarboxylic acid and silicon) "," Lactimon (long-chain amine and unsaturated acid polycarbonate) Rubonic acid and silicon).

  Also, “Efka CHEMICALS” “Efka 44, 46, 47, 48, 49, 54, 63, 64, 65, 66, 71, 701, 764, 766”, “Efka Polymer 100 (modified polyacrylate), 150 (aliphatic) System modified polymer), 400, 401, 402, 403, 450, 451, 452, 453 (modified polyacrylate), 745 (copper phthalocyanine system) "," Floren TG-710 (urethane oligomer) "," Flownon "manufactured by Kyoeisha Chemical Co., Ltd. “SH-290, SP-1000”, “Polyflow No. 50E, No. 300 (acrylic copolymer)”, “Disparon KS-860, 873SN, 874 (polymer dispersing agent), # 2150 (manufactured by Enomoto Kasei Co., Ltd.) Aliphatic polyvalent carboxylic acid), # 7004 (polyether ester type) ” That.

  Further, “Demol RN, N (Naphthalenesulfonic acid formalin condensate sodium salt), MS, C, SN-B (aromatic sulfonic acid formalin condensate sodium salt), EP”, “Homogenol L-18 (poly) Carboxylic acid type polymer), “Emulgen 920, 930, 931, 935, 950, 985 (polyoxyethylene nonylphenyl ether)”, “Acetamine 24 (coconut amine acetate), 86 (stearyl amine acetate)”, “Abisia” Solspers 5000 (phthalocyanine ammonium salt type), 13940 (polyesteramine type), 17000 (fatty acid amine type), 24000GR, 32000, 33000, 39000, 41000, 53000, “Nikkor T106 (polyoxy) manufactured by Nikko Chemical Co., Ltd. Ethylene sorbitan monooleate), MYS-IEX (polyoxyethylene monostearate), Hexagline 4-0 (hexaglyceryl tetraoleate), “Ajisper PB821, 822, 824” manufactured by Ajinomoto Fine Techno Co., etc.

  The dispersant which may be used in combination in the present invention is used in the range of 0 to 20% by weight, preferably 0.1 to 10% by weight in the photocurable inkjet ink.

  In order to further improve the dispersibility of the pigment and the storage stability of the ink, it is preferable to add an acidic derivative of an organic pigment to the inkjet ink of the present invention when the pigment is dispersed.

  The photocurable ink-jet ink of the present invention can be used in combination with other polymerization initiators for the purpose of further improving sensitivity.

  Other polymerization initiators that can be used in combination with the photocurable inkjet ink of the present invention include Irgacure 127, Irgacure 651, Irgacure 184, Darocur 1173, Irgacure 500, Irgacure 1000, Irgacure 2959, Irgacure 907, Irgacure 369, Irgacure 379, Irgacure 1700, Irgacure 149, Irgacure 1800, Irgacure 1850, Irgacure 819, Irgacure 784, Irgacure 261, Irgacure OXE-01 (CGI124), CGI242 (Ciba Specialty Chemicals), Adekaoptomer N1414, Adekaoptomer N1717 (Asahi Denka), Esacure ONE, Esacure 1001M (Lamberti), Lucillin TPO (BASF), triazine derivatives described in JP-B-59-1281, JP-B-61-9621 and JP-A-60-60104, JP-A-59-1504 And organic peroxides described in JP-A-61-243807, diazonium compounds described in JP-B-43-23684, JP-B-44-6413, JP-B-47-1604, and USP 3,567,453 No. 2,848,328, U.S. Pat. No. 2,852,379, and U.S. Pat. No. 2,940,853, azide compounds, Japanese Patent Publication No. 36-22062, Japanese Patent Publication No. 37-13109, Japanese Patent Publication No. 38-18015. Orthokeys described in Japanese Patent Publication No. 45-9610 Naziazides, various iodonium compounds described in JP-B-55-39162, JP-A-59-140203 and “MACROMOLECULES”, Vol. 10, page 1307 (1977) Onium compounds, azo compounds described in JP-A-59-142205, JP-A-1-54440, European Patent No. 109851, European Patent No. 126712, “Journal of Imaging Science (J IMAG.SCI.), Vol. 30, page 174 (1986), titanocenes described in JP-A No. 61-151197, “COORDINATION CHEMISTRY REVIEW” 84, 85-277 (1988) and JP-A-2-182701. Transition metal complexes containing a transition metal such as ruthenium described in JP-A No. 3-209477, aluminate complexes described in JP-A-3-209477, borate compounds described in JP-A-2-157760, JP-A 55-127550 2,4,5-triarylimidazole dimer described in JP-A-60-202437, 2,2′-bis (o-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl- 1,1'-biimidazole, carbon tetrabromide, organic halogen compounds described in JP-A-59-107344, JP-A-5-213861, JP-A-5-255347, JP-A-5-255421 JP-A-6-157623, JP-A-2000-344812, JP-A-2002-265512, and Japanese Patent Application No. 2004-053009. And sulfonium complexes or oxosulfonium complexes described in Japanese Patent Application No. 2004-263413, JP-A No. 2001-264530, JP-A No. 2001-261661, JP-A No. 2000-80068, JP-A No. 2001-233842, USP 3558309. Specification (1971), USP 4202697 specification (1980), Japanese Patent Application Laid-Open No. 61-24558, Japanese Patent Application Laid-Open No. 2004-534797, and Japanese Patent Application Laid-Open No. 2004-359539, Special Table Although the bifunctional photoinitiator etc. of 2002-530372 gazette etc. are mentioned, this invention is not limited to these.

  The polymerization initiator that may be used in combination in the present invention is used in the range of 0 to 10% by weight in the photocurable inkjet ink.

  In addition, by combining with a sensitizer that absorbs ultraviolet to near-infrared light to increase the activity for light from the ultraviolet to the near-infrared region, it is an extremely sensitive photopolymerizable composition. Is possible.

  Sensitizers that can be used in combination with the photocurable inkjet ink of the present invention include benzophenones, unsaturated ketones represented by chalcone derivatives and dibenzalacetone, and benzyl and camphorquinone. 1,2-diketone derivatives, benzoin derivatives, fluorene derivatives, naphthoquinone derivatives, anthraquinone derivatives, xanthene derivatives, thioxanthene derivatives, xanthone derivatives, thioxanthone derivatives, coumarin derivatives, ketocoumarin derivatives, cyanine derivatives, merocyanine derivatives, oxonol derivatives, etc. Polymethine dyes, acridine derivatives, azine derivatives, thiazine derivatives, oxazine derivatives, indoline derivatives, azulene derivatives, azurenium derivatives, squarylium derivatives, porphyrin derivatives, tetraphenyl Ruphyrin derivatives, triarylmethane derivatives, tetrabenzoporphyrin derivatives, tetrapyrazinoporphyrazine derivatives, phthalocyanine derivatives, tetraazaporphyrazine derivatives, tetraquinoxalyloporphyrazine derivatives, naphthalocyanine derivatives, subphthalocyanine derivatives, pyrylium derivatives, thiopyrylium derivatives , Tetraphylline derivatives, annulene derivatives, spiropyran derivatives, spirooxazine derivatives, thiospiropyran derivatives, metal arene complexes, organoruthenium complexes, and the like. Other specific examples include Okawara Nobu et al. Kodansha), edited by Nobu Okawara et al., "Chemicals of Functional Pigments" (1981, CMC), edited by Chusaburo Ikemori et al., "Special Functional Materials" (1986, CMC) Examples include, but are not limited to, dyes and sensitizers, and other dyes and sensitizers that absorb light from the ultraviolet to the near infrared region. Two or more of them may be used in the ratio. Among the sensitizers, thioxanthone derivatives include 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-dichlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 1-chloro-4-propoxythioxanthone. Examples of benzophenones include benzophenone, 4-methylbenzophenone, 2,4,6-trimethylbenzophenone, 4,4′-dimethylbenzophenone, 4,4′-dimethoxybenzophenone, 4,4′-bis. (Diethylamino) benzophenone and the like can be mentioned. Examples of coumarins include coumarin 1, coumarin 338 and coumarin 102. Examples of ketocoumarins include 3,3′-carbonylbis (7-diethylamino). Marine) and the like can be mentioned, but not limited thereto.

  The sensitizer which may be used in combination in the present invention is used in the range of 0 to 10% by weight in the photocurable inkjet ink.

  Moreover, the photocurable inkjet ink of this invention can add a polymerization inhibitor in order to prevent the superposition | polymerization at the time of a preservation | save.

  Specific examples of the polymerization inhibitor that can be used in combination with the photocurable inkjet ink of the present invention include hydroquinone, p-methoxyphenol, alkyl-substituted hydroquinone, catechol, tert-butylcatechol, and phenothiazine.

  The polymerization inhibitor that may be used in combination in the present invention is used in the range of 0 to 5.0% by weight in the photocurable inkjet ink.

  In addition, the photocurable ink-jet ink of the present invention can be added with a polymerization accelerator or a chain transfer catalyst typified by amine, thiol, or disulfide for the purpose of further promoting polymerization.

  Specific examples of the polymerization accelerator and chain transfer catalyst that can be used in combination with the photocurable inkjet ink of the present invention include, for example, trimethylamine, methyldimethanolamine, N-phenylglycine, triethanolamine, N, N-diethylaniline, and the like. Amines, thiols described in U.S. Pat. No. 4,414,312 and JP-A 64-13144, disulfides described in JP-A-2-291561, U.S. Pat. No. 3,558,322 and JP-A 64-17048. Examples thereof include thiones described in JP-A No. 2-291560, and o-acylthiohydroxamate and N-alkoxypyridine thiones described in JP-A-2-291560.

  The polymerization accelerator and chain transfer catalyst that may be used in combination in the present invention are used in the range of 0 to 5.0% by weight in the photocurable inkjet ink.

  It is preferable to add a surface conditioner to the inkjet ink of the present invention in order to improve the wettability to the substrate. Specific examples of the surface conditioner include BYK-300, 302, 306, 307, 310, 315, 320, 322, 323, 325, 330, 331, 333, 337, 340, 344, 370, and 375 manufactured by BYK-Chemie. 377, 350, 352, 354, 355, 356, 358N, 361N, 357, 390, 392, UV3500, UV3510, UV3570, “Tegorad-2100, 2200, 2250, 2500, 2700” manufactured by Tego Chemie. These surface conditioners may be used alone or in combination of two or more as required.

  The surface conditioner which may be used in combination in the present invention is used in the range of 0 to 1.0% by weight in the photocurable inkjet ink.

  The photocurable ink-jet ink of the present invention can use various additives such as a plasticizer, an ultraviolet light inhibitor, a light stabilizer, and an antioxidant.

  The photocurable ink-jet ink of the present invention is produced by well dispersing a pigment together with a monomer and a pigment dispersant using an ordinary dispersing machine such as a sand mill. It is preferable to prepare a concentrated solution having a high pigment concentration in advance and dilute with a monomer. Sufficient dispersion is possible even with dispersion by a normal disperser. Therefore, excessive dispersion energy is not required, and a large amount of dispersion time is not required. An ink having excellent properties is prepared. The ink is preferably filtered through a filter having a pore size of 3 μm or less, and more preferably 1 μm or less.

  The photocurable ink-jet ink of the present invention is preferably adjusted to have a high viscosity at 25 ° C. of 5 to 50 mPa · s. An ink having a viscosity of 5 to 50 mPa · s at 25 ° C. exhibits stable ejection characteristics, particularly from a head having a normal frequency of 4 to 10 KHz to a head having a high frequency of 10 to 50 KHz.

  When the viscosity is less than 5 mPa · s, a decrease in the follow-up property of the discharge is recognized in the high-frequency head. When the viscosity exceeds 50 mPa · s, even if a mechanism for reducing the viscosity by heating is incorporated in the head, the discharge itself A drop occurs, the ejection stability becomes poor, and the ejection cannot be performed at all.

  In addition, the photocurable ink-jet ink of the present invention preferably has an electric conductivity of 10 μS / cm or less and no electrical corrosion inside the head in the piezo head. Further, in the continuous type, it is necessary to adjust the electric conductivity by the electrolyte. In this case, it is necessary to adjust the electric conductivity to 0.5 mS / cm or more.

  In order to use the photocurable ink-jet ink of the present invention, this ink is first supplied to the printer head of a printer for an ink-jet recording system, discharged from the printer head onto a substrate, and then activated energy such as ultraviolet rays or electron beams Irradiate the line. This quickly cures the composition on the print medium.

  In the polymerization reaction, the photocurable ink-jet ink of the present invention can be polymerized by applying energy by ultraviolet rays, visible rays, near infrared rays, electron beams or the like to obtain a desired polymer. The definitions of ultraviolet rays, visible rays, near-infrared rays and the like in this specification are based on “Iwanami Rikagaku Dictionary 4th Edition” (1987, Iwanami) edited by Ryogo Kubo et al.

  Therefore, the photocurable ink-jet ink of the present invention is a low-pressure mercury lamp, medium-pressure mercury lamp, high-pressure mercury lamp, ultrahigh-pressure mercury lamp, xenon lamp, carbon arc lamp, metal halide lamp, fluorescent lamp, tungsten lamp, argon ion laser, helium cadmium laser, By applying energy from various light sources such as helium neon laser, krypton ion laser, various semiconductor lasers, YAG laser, light emitting diode, CRT light source, plasma light source, electron beam, gamma ray, ArF excimer laser, KrF excimer laser, F2 laser A polymer or a cured product can be obtained.

  Examples of the substrate that can be used in the present invention include non-coated paper, coated paper, and non-absorbent support.

  Specific non-absorbing supports include various non-absorbing plastics and films thereof. Examples of various plastic films include PET film, OPS film, OPP film, ONy film, PVC film, PE film, A TAC film can be mentioned. Examples of other plastics include, but are not limited to, polycarbonate, acrylic resin, ABS, polyacetal, PVA, and rubbers. Metals and glasses can also be used.

  The photocurable ink-jet ink obtained in the present invention can be printed and cured using the same technique as before. The ink of the present invention can suppress the amount of coloration after ink curing and the amount of exudation such as volatilization and elution of the photopolymerization initiator and other compositions from the film surface. Furthermore, as a result, the odor derived from the photopolymerization initiator, its decomposition products, and other compositions can be reduced.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to only the following Example at all. In the following examples, the numbers in the tables represent% by weight.

  Prior to the examples, the photopolymerization initiators of the present invention used in the examples are shown in Table 1.

Table 1

  These photopolymerization initiators shown in Table 1 can be obtained by using the synthesis method described in Japanese Patent Application No. 2008-028249.

  First, yellow, magenta, cyan and black pigment dispersions comprising pigment, pigment dispersant and monomer were prepared. In addition to the above pigment dispersion, a monomer, a photopolymerization initiator, and the like were mixed to obtain yellow, magenta, cyan, and black inks. Among these, the cyan inkjet ink will be described.

Examples 3, 9-13
In the formulation shown in Table 2, a pigment and a dispersant were added to an organic solvent, stirred until uniform with a high speed mixer or the like, and the resulting mill base was dispersed for about 1 hour with a horizontal sand mill to obtain a cyan pigment dispersion. Produced. Next, 11.4% by weight of a cyan pigment dispersion, 40% by weight of 2-phenoxyethyl acrylate as a monomer, 20.5% by weight of tripropylene glycol diacrylate, 20% by weight of ethoxylated trimethylolpropane triacrylate, surface conditioning BYK-331 (silicon resin manufactured by BYK Chemie) 0.1% by weight, photopolymerization initiator 4% by weight shown in Table 3, and combined polymerization initiator Lucillin TPO (manufactured by BASF) 4% by weight were mixed. A cyan inkjet ink was obtained.

Comparative Examples 1-5
A cyan inkjet ink was prepared in the same manner as in Example 1 except that 4% by weight of the photopolymerization initiator shown in Table 4 was used as the photopolymerization initiator.

Table 2

Table 3

Table 4

The performance evaluation of the printing ink was performed as follows.
・ (1) Curability: Ink jet ink printed on a PET substrate with a UV-IJ printer is irradiated with ultraviolet rays using a belt conveyor type ultraviolet irradiation device (metal halide lamp 160 W / cm1 lamp), and then the ink surface is removed. Judgment was made based on the conveyor speed at which the adhesiveness disappeared when touched by a finger. As the conveyor speed (m / min) of the ultraviolet irradiation device is larger, the curability is better. The results are shown in Table 5.
-(2) Yellowing: Conveyor speed at which inkjet prints are printed on a PET substrate with a UV-IJ printer and the printed matter is completely cured using a belt conveyor type ultraviolet irradiation device (10 m / min) Then, ultraviolet irradiation (high pressure mercury lamp 160 W / cm1 lamp) was performed, and 10 panelists judged the yellowing before and after curing in the coated product. Judgment was performed by relative evaluation by five steps of 1 (defect) to 5 (good). The results are shown in Table 5.
(3) Bleeding property: Conveyor speed at which printed matter is completely cured by using a belt conveyor type ultraviolet irradiation device, which is obtained by printing inkjet ink on a PET substrate with a UV-IJ printer ( 10m / min) with UV irradiation (high pressure mercury lamp 160W / cm1 lamp), put the cured printed material on the printed material with a PET substrate not printed, and leave it for 1 day at a temperature of 60 ° C and a pressure of 15g / cm ² The amount of the photopolymerization initiator that oozed out (transferred) to the unprinted PET base material was quantified. The results are shown in Table 5.

Table 5

  The photocurable inkjet ink using the photopolymerization initiator of the present invention has high curability as compared with a photocurable inkjet ink using a photopolymerization initiator that is generally used. It became clear. It was also revealed that the photocurable inkjet ink of the present invention exhibits the highest curability when a photopolymerization initiator having only a carbonyloxy group with respect to thioxanthone is used.

  Furthermore, it is clear that the photocurable inkjet ink using the photopolymerization initiator of the present invention is excellent in yellowing compared with the photocurable inkjet ink using a photopolymerization initiator that is generally used. became. Further, it was also revealed that the photocurable ink-jet ink of the present invention is most excellent in yellowing when a photopolymerization initiator having only a carbonyloxy group with respect to thioxanthone is used.

  In addition, the photocurable ink-jet ink using the photopolymerization initiator of the present invention has a leaching amount of the photopolymerization initiator as compared with a photocurable ink-jet ink using a photopolymerization initiator that is generally used. It became clear that there was little. At this time, from the evaluation of the bleeding amount of the photocurable inkjet ink of Comparative Examples 1 to 5, the photopolymerization initiator has a polymerizable substituent capable of reacting with a monomer or the like in the photocurable inkjet ink. It can be seen that the agent tends to have a smaller amount of exudation, but the photopolymerization initiator of the present invention has a polymerizable substituent capable of reacting with a monomer or the like of the photocurable inkjet ink, and It is clear that the amount of exudation is small in any of those having no polymerizable substituent. Although it is not certain about this reason, since the photocurable ink-jet ink using the photopolymerization initiator of the present invention has the highest curability according to the evaluation of curability, the photocurable ink-jet using the photopolymerization initiator of the present invention is used. It is presumed that the crosslink density of the ink is high and the photopolymerization initiator is less likely to ooze out from the cured film. However, comparing the evaluation results of the photocurable inkjet inks of Comparative Example 1 and Comparative Example 2, it can be seen that the better the curability, the better the amount of seepage. Therefore, it is also considered that the structure of the photopolymerization initiator of the present invention is difficult to ooze out from the ink due to some reason.

  It is clear that the photocurable inkjet ink using the photopolymerization initiator of the present invention is excellent in curability even when compared with the photocurable inkjet ink using a photopolymerization initiator that is generally used. It was. In addition, the photocurable inkjet ink of the present invention can suppress coloring after ink curing and bleeding of the photopolymerization initiator as compared with a general photocurable inkjet ink. It was clarified that all of these requirements that were difficult with the photo-curable ink-jet ink using the above were satisfied.

Claims (5)

A photocurable inkjet ink comprising a monomer, a pigment, and a photopolymerization initiator represented by the following general formula (1) or the following general formula (2).
General formula (1)

Wherein R ^{1 to} R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group , a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic oxy group, substitution or unsubstituted alkoxycarbonyl group, a substituted or unsubstituted acyl group, was or is represented by the following general formula (4) that represents a group. provided that at least one is a group represented by the following general formula (4). in addition, Table under following general formula (4) Te R ¹ to R ⁸ smell of R ¹ to R ⁸ Substituents other than the group to be formed may form a ring with adjacent substituents.)
General formula (2)

Wherein R ^{9 to} R ¹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group Substituted or unsubstituted heterocyclic group, substituted or unsubstituted heterocyclic oxy group, substituted or unsubstituted alkenyl group, substituted or unsubstituted alkoxycarbonyl group, substituted or unsubstituted acyl group, the following general formula (3 Or a group represented by the following general formula (4), a group represented by the general formula (3) in R ^{9 to} R ¹⁵ , and a group represented by the following general formula (4). Substituents other than the group to be formed may form a ring with adjacent substituents.
A ¹ represents a divalent linking group. )
General formula (3)

(In the formula, R ¹⁶ represents a substituted or unsubstituted alkyl group .)
General formula (4)

(Wherein R ¹⁷ represents a substituted or unsubstituted alkyl group .
A ² represents a divalent linking group. ) 2. The light according to claim 1, wherein R ^{1 to} R ⁸ and R ^{9 to} R ¹⁵ are each independently a hydrogen atom, a group represented by the general formula (3), or a group represented by the general formula (4). Curing ink jet ink. (However, R ^{1 to} R ⁸ do not become general formula (3).) One of R ¹ to R ⁸ is one general formula (4) a group represented by claim 1 or 2, wherein the photocurable ink-jet ink. R ⁹ to R ¹⁵ are, photocurable inkjet ink according to any one claims 1 to 3 is a hydrogen atom. The printed matter obtained by printing the photocurable inkjet ink in any one of Claims 1-4, and making it harden | cure by light irradiation.