KR20150080451A - Paint and near infrared absorption filter - Google Patents

Abstract

(식 중, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷ 및 R¹⁸은 수소원자 또는 치환기를 가져도 되는 C1~10의 알킬기를 나타내고, R¹⁹, R²⁰, R²¹ 및 R²²는 수소원자, 할로겐원자, 치환기를 가져도 되는 C1~10의 알킬기 또는 치환기를 가져도 되는 아미노기를 나타내고, 상기 알킬기 중의 메틸렌기는 -O- 또는 -CH=CH-로 치환되어 있어도 되고, t는 1~4의 수를 나타내고, An^{q -}는 q가의 음이온을 나타낸다.) A near infrared ray absorbing filter formed by using a paint comprising an infrared absorbing dye (A), a resin (B) and a solvent (C) and containing diacetone alcohol as an essential component as a solvent (C) component. The infrared absorbing dye (A) is preferably a diimmonium compound, particularly a diimmonium compound represented by the following general formula (I).

^{(Wherein, R 11, R 12, R} 13, R 14, R 15, R 16, R 17 and R ¹⁸ represents an alkyl group of C1 ~ 10 which may have a hydrogen atom or a substituent, R ^19, R ^20, R ²¹ and R ²² represent a hydrogen atom, a halogen atom, a C1-10 alkyl group which may have a substituent or an amino group which may have a substituent, and the methylene group in the alkyl group may be substituted with -O- or -CH = CH- , T represents a number of 1 to 4, and An ^{q -} represents an anion of q.

Description

PAINT AND NEAR INFRARED ABSORPTION FILTER [0001]

The present invention relates to an infrared absorbing dye, a resin, a paint containing diacetone alcohol as a solvent, and a near infrared absorbing filter formed using the paint.

The near-infrared absorption filter has a high transmittance in the visible light region and can effectively block infrared rays. The near-infrared absorption filter can be applied to a display panel such as a plasma display panel, a CRT, a fluorescent display tube, A photodiode, a CCD, a C-MOS, etc. used in a light receiving element or an image pickup element of an optical apparatus such as a camera or a video camera; An optical lens, an automobile glass, a building material glass, a solar cell module, and the like; A light receiving element of an optical apparatus such as a video camera, an image pickup element, and the like.

Patent Document 1 discloses a positive photosensitive resin composition containing a diacetone alcohol as a solvent. Patent Document 2 discloses a colorant-containing curable composition containing a colorant and a solvent, and diacetone alcohol is exemplified as a solvent . Patent Document 3 discloses a positive photosensitive resin composition containing diacetone alcohol as a solvent. Patent Document 4 discloses an ink containing an acidic dye and an alcohol-based organic solvent. Patent Document 5 discloses a diimonium compound A near infrared ray absorption filter is obtained.

However, the above Patent Documents 1 to 5 do not suggest that the light resistance of a film obtained by applying a paint to a substrate is improved by using diacetone alcohol as a solvent.

Japanese Patent Application Laid-Open No. 10-123700 US2007049650A1 Japanese Patent Application Laid-Open No. 2010-128065 Japanese Patent Publication No. 4199580 Japanese Patent Publication No. 4403473

Accordingly, an object of the present invention is to provide a near infrared absorbing filter having high light resistance.

As a result of intensive studies, the inventors of the present invention have found that when a coating composition containing an infrared absorbing dye (A), a resin (B) and a solvent (C) and containing a diacetone alcohol as an essential component The near infrared absorption filter has a high light resistance.

The present invention provides a coating material containing an infrared absorbing dye (A), a resin (B) and a solvent (C) and containing diacetone alcohol as an essential component as a solvent (C) component.

Further, the present invention provides a near infrared absorption filter formed using the above paint.

The near-infrared absorption filter of the present invention is excellent in high light resistance.

 Hereinafter, the paint and the near infrared ray absorbing filter of the present invention will be described based on preferred embodiments.

In the coating material of the present invention, the infrared absorbing dye (A) may be one which has been used as a conventional (near) infrared absorbing dye with a characteristic absorption in the infrared region. For example, a cyanine compound, a squarylium compound, There may be mentioned a porphyrin compound, a metal dithiol complex, chromium, a cobalt metal complex salt compound, an anthraquinone, a phthalocyanine compound, a naphthalocyanine compound, a diimmonium compound and an inorganic oxide particle. Among them, Is high and thus transparency in the visible light region is high.

Among the above diimmonium compounds, those represented by the following general formula (I) are more preferred because they are excellent in moisture resistance and heat resistance.

(Wherein R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ and R ¹⁸ each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms which may have a substituent, R ¹⁹ , R ²⁰ , R ²¹ and R ²² each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms which may have a substituent or an amino group which may have a substituent, O- or -CH = CH-, t represents a number of 1 to 4, An ^{q -} represents an anion of q, q represents 1 or 2, p represents a charge retained in a neutral state Coefficient.)

The substituent represented by R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ , R ¹⁸ , R ¹⁹ , R ²⁰ , R ²¹ and R ²² in the general formula (I) Examples of the alkyl group having 1 to 10 carbon atoms include methyl, ethyl, propyl, isopropyl, butyl, sec. Butyl, tert.butyl, isobutyl, amyl, isoamyl, tertiary amyl, hexyl, cyclohexyl, cyclohexylmethyl, 3-heptyl, heptyl, isoheptyl, heptyl, n-octyl, isooctyl, tert-octyl, 3,3-trifluoropropyl, prop-1-en-1-yl and the like,

Examples of the halogen atom represented by R ¹⁹ , R ²⁰ , R ²¹ and R ²² include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom,

Examples of the amino group which may have a substituent represented by R ¹⁹ , R ²⁰ , R ²¹ and R ²² include amino, ethylamino, dimethylamino, diethylamino, butylamino, cyclopentylamino, 2-ethylhexylamino, Anilino, chlorophenylamino, toluidino, anisidino, N-methyl-anilino, diphenylamino, naphthylamino, 2-pyridylamino, methoxycarbonylamino, phenoxycarbo N, N-diethylaminocarbonylamino, N, N-diethylaminocarbonylamino, morpholino, morpholino, morpholino, morpholino, morpholino, morpholino, Methoxycarbonylamino, ethoxycarbonylamino, t-butoxycarbonylamino, n-octadecyloxycarbonylamino, N-methyl-methoxycarbonylamino, phenoxycarbonyl Amino, sulfamoyl ami , There may be mentioned N, N- dimethylamino-sulfonyl, such as amino, methyl-sulfonyl-amino, amino-butylsulfonyl, phenylsulfonyl amino.

Examples of the anion of q-valence represented by pAn ^{q -} in the general formula (I) include a methanesulfonate anion, a dodecylsulfonate anion, a benzenesulfonate anion, a toluenesulfonate anion, a trifluoromethanesulfonate anion, a naphthalenesulfonate anion, Amino-4-methyl-5-chlorobenzenesulfonic acid anion, 2-amino-5-nitrobenzenesulfonic acid anion, JP-A-10-235999, JP-A-10-337959 Japanese Unexamined Patent Application Publication No. 11-102088, Japanese Unexamined Patent Application Publication No. 2000-108510, Japanese Unexamined Patent Publication No. 2000-168223, Japanese Unexamined Patent Publication No. 2001-209969, Japanese Unexamined Patent Application Publication No. 2001-322354 JP-A-2006-248180, JP-A-2006-297907, JP-A-8-253705, JP-A-2004-503379, JP- 336150, International Publication No. 2006/28006, etc. In addition to the organic sulfonic acid anion such as the described sulfonic acid anion described above, it is possible to use a chloride ion, a bromide ion, an iodide ion, a fluoride ion, a chlorate ion, a thiocyanate ion, a perchlorate ion, a hexafluorophosphate ion, a hexafluoroantimony acid ion, a tetrafluoroborate ion , Octyl phosphate ion, dodecyl phosphate ion, octadecyl phosphate ion, phenyl phosphate ion, nonylphenyl phosphate ion, 2,2'-methylenebis (4,6-di- Quincher anion having a function of de-exciting (quenching) an active molecule in an excited state or a cyclopentadienyl ring having a functional group such as a carboxyl group, a phosphonic acid group, a sulfonic acid group And an anion of a metallocene compound such as ferrocene or ruthenocene having an anionic group,

Specific examples of the cation of the diimonium compound represented by the general formula (I) according to the present invention include the following compounds Nos. 1 to 8.

The infrared absorbing dye (A) may be used singly or in combination of plural species.

In the infrared absorbing dye (A), the content of the compound represented by the general formula (I) is preferably 50 to 100% by mass, and more preferably 70 to 100% by mass. When the content of the compound represented by the general formula (I) is less than 50% by mass, the solubility in a solvent may be lowered or the heat resistance may be lowered.

The infrared absorbing dye (A) preferably has a maximum absorption wavelength (? Max) of 700 nm or more, more preferably 780 to 850 nm. When the maximum absorption wavelength (max) of the coating film is less than 700 nm, it is not preferable because it does not absorb the light of the target wavelength.

In the coating material of the present invention, the content of the infrared absorbing dye (A) is preferably 0.01 to 50 mass%, more preferably 0.1 to 10 mass%, in the coating material of the present invention. If the content of the infrared absorbing dye (A) is less than 0.01% by mass, the near-infrared absorbing filter formed by using the coating material of the present invention may not absorb the target wavelength. When the content is larger than 50% by mass, A) may occur in some cases.

In the coating material of the present invention, the resin (B) is not particularly limited as long as it can uniformly disperse the infrared absorbing dye (A). Examples of the resin (B) include polyester resins, polyacrylic resins, polyamide resins, polyurethane resins, polyolefin resins, Based resin, a carbonate-based resin, or a resin obtained by crosslinking these resins with an organic peroxide, a crosslinking agent, a photo-crosslinking initiator, or the like. It is also preferable that the glass transition temperature of the resin and the glass transition temperature of the cured film (near-infrared absorption filter) obtained by applying the paint containing the resin to the substrate are not less than the use guaranteed temperature of the equipment to be used.

Among the above-mentioned resins (B), the polyacrylic resin is preferred in terms of compatibility with the infrared absorbing dye (A), and more preferably a polymerizable compound having an ethylenic unsaturated bond singly or plurally.

The polymerizable compound having an ethylenically unsaturated bond is not particularly limited, and conventionally known ones can be used. Examples thereof include ethylene, propylene, butylene, isobutylene, vinyl chloride, vinylidene chloride, vinyl fluoride Unsaturated aliphatic hydrocarbons such as diene, tetrafluoroethylene, and the like; (Meth) acrylic acid,? -Chloroacrylic acid, itaconic acid, maleic acid, citraconic acid, fumaric acid, hymeic acid, crotonic acid, isocrotonic acid, vinylacetic acid, allylacetic acid, cinnamic acid, sorbic acid, mesaconic acid, (Meth) acryloyloxyethyl], mono [2- (meth) acryloyloxyethyl] phthalate mono [2- (meth) acryloyloxyethyl], and omega -carboxylic polycaprolactone mono (Meth) acrylate maleate, hydroxypropyl (meth) acrylate maleate, dicyclopentadiene maleate or one carboxyl group and two or more (meth) Unsaturated polybasic acids such as polyfunctional (meth) acrylates having a methacryloyl group; (Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, glycidyl Butyl (meth) acrylate, isobutyl (meth) acrylate, cyclohexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl Stearyl acrylate, lauryl (meth) acrylate, methoxyethyl (meth) acrylate, dimethylaminomethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, aminopropyl (meth) acrylate, dimethylaminopropyl (Meth) acrylate, ethoxyethyl (meth) acrylate, poly (ethoxy) ethyl (meth) acrylate, butoxyethoxyethyl (meth) acrylate, ethylhexyl (Meth) acrylate, allyl (meth) acrylate, (Meth) acrylate, benzyl (meth) acrylate, ethyleneglycol di (meth) acrylate, diethyleneglycol di (meth) acrylate, triethyleneglycol di Acrylate, trimethylolethane tri (meth) acrylate, trimethylol propane tri (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6- Pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, tricyclodecane dimethylol (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol tetra Esters of unsaturated monobasic acids and polyhydric alcohols or polyhydric phenols such as (meth) acryloylethyl] isocyanurate and polyester (meth) acrylate oligomers; Metal salts of unsaturated polybasic acids such as zinc (meth) acrylate and magnesium (meth) acrylate; Maleic anhydride, itaconic anhydride, citraconic anhydride, methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, 5- (2,5-dioxotetrahydrofuryl) Acid anhydrides of unsaturated polybasic acids such as cyclohexene-1,2-dicarboxylic acid anhydride, trialkyltetrahydrophthalic anhydride-maleic anhydride adduct, dodecenyl ansuccinic acid, and anhydrous methyl hymeic acid; (Meth) acrylamide, methylenebis- (meth) acrylamide, diethylenetriamintris (meth) acrylamide, xylylenebis (meth) acrylamide, alpha -chloroacrylamide, N-2-hydroxyethyl Amides of unsaturated monobasic acids and polyamines such as methacrylamide; Unsaturated aldehydes such as acrolein; Unsaturated nitriles such as (meth) acrylonitrile,? -Chloroacrylonitrile, vinylidene cyanide, and allyl cyanide; Vinylbenzene sulfonic acid, vinylbenzenesulfonic acid, vinylbenzenesulfonic acid, vinylbenzenesulfonic acid, vinylbenzenesulfonic acid, vinylbenzenesulfonic acid, vinylbenzenesulfonic acid, and vinylbenzenesulfonic acid. Unsaturated aromatic compounds such as vinylbenzyl methyl ether and vinyl benzyl glycidyl ether; Unsaturated ketones such as methyl vinyl ketone; Unsaturated amine compounds such as vinylamine, allylamine, N-vinylpyrrolidone and vinylpiperidine; Vinyl alcohols such as allyl alcohol and crotyl alcohol; Vinyl ethers such as vinyl methyl ether, vinyl ethyl ether, n-butyl vinyl ether, isobutyl vinyl ether and allyl glycidyl ether; Unsaturated imides such as maleimide, N-phenylmaleimide and N-cyclohexylmaleimide; Indene such as indene and 1-methylindene; Aliphatic conjugated dienes such as 1,3-butadiene, isoprene and chloroprene; Macromonomers having a mono (meth) acryloyl group at the end of a polymer molecular chain such as polystyrene, polymethyl (meth) acrylate, poly-n-butyl (meth) acrylate and polysiloxane; Vinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, polyvinyl pyrrolidone, Containing vinyl monomers and vinyl epoxide compounds of polyepoxy compounds, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, and other hydroxyl group-containing polyfunctional acrylates and vinylpyridinium compounds such as vinylpyridine, vinyl group-containing vinyl monomers and polyisocyanate compounds, A reaction product of a polyfunctional isocyanate such as tolylene diisocyanate and hexamethylene diisocyanate, a reaction product of a hydroxyl group-containing polyfunctional acrylate such as pentaerythritol triacrylate, dipentaerythritol pentaacrylate and the like such as 2, 3, 4, 5, base The multifunctional acrylate having an acid value of a reaction product of the anhydride; Ethylenically unsaturated monoisocyanate, which is the reaction product of an acrylate having a hydroxyl group such as (meth) acrylic acid-2-hydroxyethyl, (meth) acrylic acid-2-hydroxypropyl and (meth) , A polyhydric alcohol or a polyhydric phenol; Urethane acrylate obtained by reacting an acrylic polyol with a diisocyanate compound; Novolak type epoxy compounds such as phenol and / or cresol novolak epoxy resin, biphenyl skeleton, novolak epoxy resin having naphthalene skeleton, bisphenol A novolak type epoxy compound and dicyclopentadiene novolak type epoxy compound, polyfunctional An epoxy acrylate obtained by reacting an unsaturated monobasic acid with an epoxy group such as a polyphenylmethane type epoxy resin having an epoxy group or a bisphenol A type epoxy resin and by reacting a polybasic acid anhydride; Esters of polyhydric alcohols or polyhydric phenols with anhydrides of unsaturated polybasic acids.

The polyacrylic resin can be obtained by polymerizing these polymerizable compounds either singly or in combination.

As the organic peroxide to be used for obtaining the resin, it is preferred that the peroxy radical is easily generated by the presence of heat or an oxidation-reduction system. For example, 1,1-bis (t-butylperoxy) , 5-trimethylcyclohexane, 2,5-dimethylhexane-2,5-dihydroxyperoxide, di-t-butylperoxide, t-butylcumylperoxide, dicumylperoxide, butylperoxy) -p-diisopropylbenzene, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5- Butyl peroxybenzene, 2,5-dimethyl-2,5-di (benzoyl peroxy) hexane, t-butyl peroxymaleic acid, t-butyl peroxyisopropyl Carbon and the like, and a radical is generated in the polymer main chain by the hydrogen extraction reaction of the polymer main chain (main chain) due to radicals generated from the peroxide to take a crosslinked form, and the entire polymer main chain is added to the crosslinked structure It will be uniformly crosslinked.

Examples of the crosslinking agent used for obtaining the resin include polyfunctional epoxy compounds, polyfunctional isocyanates, dianhydrides, acetophenone, benzophenone, anthraquinone, triazine, aziridine, melamine compounds, metal salts and metal chelate compounds; Ultraviolet crosslinking agents such as polyfunctional acrylates, olefinically unsaturated compounds, and benzophenones, which are copolymerizable; Oligomers obtained by polymerizing trifunctional benzophenone, acrylated benzophenone, 1- [4- (2-methoxyphenyl) -1,2,4-triazine, 2-hydroxy-2-methyl-1-propan-1-one and 2-isocyanate ethyl methacrylate, an oligomer obtained by polymerizing a reaction product of 2-hydroxy- And post-addition photo-crosslinking agents such as methyl- [4- (1-methylvinyl) phenyl] propanol oligomer and the like.

Examples of the photo-crosslinking initiator used for obtaining the resin include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane- 1-hydroxy-2-methyl-1-phenyl-propion-1-one, such as 1-hydroxy-cyclohexyl- , And benzyldimethylketal systems such as 2,2-dimethoxy-1,2-diphenylethane-1-one.

In the coating material of the present invention, the content of the resin (B) is preferably from 30 to 99% by mass, more preferably from 60 to 95% by mass, based on the solid content of the coating material of the present invention. When the content of the resin (B) is less than 30 mass%, adhesion of the near infrared ray absorbing filter to the substrate after application may be lowered. On the other hand, when the content is more than 99 mass%, the strength of the near infrared ray absorbing filter may be lowered.

In the coating material of the present invention, it is preferable that the solvent (C) contains diacetone alcohol as an essential component and other components which can dissolve or disperse the respective components (the infrared absorbing dye (A) etc. of the present invention) It can be used by mixing with a solvent. Examples of the other solvent include ketones such as methyl ethyl ketone, methyl amyl ketone, diethyl ketone, acetone, methyl isopropyl ketone, methyl isobutyl ketone, cyclohexanone and 2-heptanone; Ether solvents such as ethyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane and dipropylene glycol dimethyl ether; Esters such as methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, cyclohexyl acetate, ethyl lactate, dimethyl succinate, and texanol; Cellosolve solvents such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether; Alcohol-based solvents such as methanol, ethanol, iso-or n-propanol, iso- or n-butanol, and amyl alcohol; Propylene glycol monomethyl ether-2-acetate (PGMEA), dipropylene glycol monomethyl ether acetate, 3-methoxybutyl acetate, ethoxyethyl propionate, etc. Ether-based solvent; BTX type solvents such as benzene, toluene and xylene; Aliphatic hydrocarbon solvents such as hexane, heptane, octane and cyclohexane; Terpene-based hydrocarbon oils such as terphenyl oil, D-limonene, and pinene; Paraffin type solvents such as mineral spirits, Swazol # 310 (Cosmo Matsuyama Sekiyu), Solvesso # 100 (Ekuson Kagaku); Halogenated aliphatic hydrocarbon solvents such as carbon tetrachloride, chloroform, trichlorethylene, methylene chloride, and 1,2-dichloroethane; Halogenated aromatic hydrocarbon solvents such as chlorobenzene; A solvent such as acetonitrile, carbon disulfide, N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone, dimethylsulfoxide, water, etc. These solvents may be used singly or as a mixed solvent of two or more kinds. Among them, ketones, ether ester solvents and the like, in particular, propylene glycol-1-monomethyl ether-2-acetate, dimethylacetamide, cyclohexanone and the like, ), Which is preferable.

In the coating material of the present invention, the diacetone alcohol is preferably 30 to 100% by mass, more preferably 50 to 95% by mass, based on the total amount of the solvent (C).

In the coating material of the present invention, the amount of the solvent (C) to be used is preferably 5 to 30 mass% in the composition other than the solvent (C), and it is difficult to increase the film thickness when it is less than 5 mass% It is not preferable because it can not absorb the desired wavelength light sufficiently. If it exceeds 30 mass%, the preservability of the composition due to precipitation of the composition deteriorates, or the viscosity is improved and the handling is lowered.

The coating material of the present invention may further contain an inorganic compound. Examples of the inorganic compound include metal oxides such as nickel oxide, iron oxide, iridium oxide, titanium oxide, zinc oxide, magnesium oxide, calcium oxide, potassium oxide, silica and alumina; The present invention relates to a method for producing a metal oxide fine particle comprising the steps of: forming a layered clay mineral, milky blue, calcium carbonate, magnesium carbonate, cobalt, manganese, glass powder, mica, talc, kaolin, ferrocyanide, , Platinum, gold, silver, copper and the like. Of these, titanium oxide, silica, layered clay mineral, silver and the like are preferable. In the coating material of the present invention, the content of the inorganic compound is preferably 0.1 to 50 parts by mass, more preferably 0.5 to 20 parts by mass based on 100 parts by mass of the acrylic resin, More than species can be used.

These inorganic compounds are used, for example, as fillers, antireflective agents, conductive agents, stabilizers, flame retardants, mechanical strength improvers, special wavelength absorbing agents,

The coating material of the present invention may contain, if necessary, a dye other than the infrared absorbing dye of the present invention; thermal polymerization inhibitors such as p-anisole, hydroquinone, pyrocatechol, t-butylcatechol and phenothiazine; A thermal polymerization initiator; A photopolymerization initiator; Plasticizers; Adhesion promoters; Fillers; Defoamer; Leveling agents; Surface modifiers; Antioxidants; Ultraviolet absorber; Dispersing aids; An anti-aggregation agent; catalyst; Effect promoters; A crosslinking agent; Thickener; Surfactants; Silane coupling agents; Additives such as melamine can be added.

In the coating material of the present invention, the content of an optional component other than the infrared absorbing dye (A) and the resin (B) (excluding the solvent (C)) is appropriately selected depending on the purpose of use and is not particularly limited, Is set to 50 parts by mass or less based on 100 parts by mass of the resin (B).

Next, the near infrared ray absorption filter of the present invention will be described.

The near-infrared absorbing filter of the present invention is obtained by applying the coating material of the present invention onto a substrate.

The substrate is not particularly limited, but preferable examples thereof include glass plates, polyethylene terephthalate plates, polycarbonate plates, polyimide plates, polyamide plates, polymethylmethacrylate plates, polystyrene plates, polyvinyl chloride plates, polyolefin plates, Polyvinyl alcohol plates, cellulose acetate plates, polyarylate plates, polysulfone plates, polyether sulfone plates, silicon wafers, reflector plates, nylon plates, An interference plate, a quartz plate, a glass plate, a paper, a wood plate, a metal plate, and the like.

The substrate may be subjected to a surface treatment by a conventionally known method such as a corona discharge treatment, a flame treatment, a plasma treatment, a glow discharge treatment, a roughening treatment or a chemical treatment, a surface treatment by an anchor coat agent, Coating may be performed.

The substrate may be coated by a known method such as a curtain coating method, an extrusion coating method, a roll coating method, a spin coating method, a dip coating method, a bar coating method, a spray coating method , A slide coating method, a blade coating method, a gravure coating method, a printing coating method and the like.

The near-infrared absorption filter of the present invention has a transmittance of 10% or less, preferably 8% or less in the (near) infrared region of 800 to 1100 nm.

The near infrared ray absorbing filter of the present invention may be applied to a display panel such as a plasma display panel, a CRT, a fluorescent display tube, and an electric field radial display; A photodiode, a CCD, a C-MOS used in a light receiving element or an image pickup element of an optical device such as a camera or a video camera; A heat ray shielding filter such as an optical lens, an automobile glass, a building glass, and a solar cell module; A light receiving element or an image pickup element of an optical device such as a video camera; Infrared absorption ink / toner application; Examples of the infrared absorbing material include a photosensitizing material using an infrared sensitive safelight filter for a sensitive material, a semiconductor laser light in an infrared region as a light source, a recording material for an optical disk, and the like; Anti-counterfeiting applications such as cash cards and ID cards; Infrared absorbing dimming material included in sunlight; Agricultural materials such as plant growth control; And protective materials such as goggles, and there are no particular restrictions on its use.

Example

Hereinafter, the present invention will be described in more detail by way of Examples and the like, but the present invention is not limited to these Examples and the like.

[Example 1] Preparation of paint No. 1

(Trifluoromethanesulfonyl) imide salt of Compound No. 1 as a component (A) and 2.75 g of diacetone alcohol as a component (C) were added and dissolved by stirring. Thereafter, 5 g of SPC-2000 (manufactured by Showa Denko K.K.) as a component (B) was mixed and stirred until the insoluble matter disappeared to obtain Paint No. 1. [

Examples 2 to 6 and Comparative Examples 1 to 2 Coating of Paint No. 2 to No. 6 and Comparative Paint No. 1 to No. 2

In the same procedure as in Example 1, the components shown in Table 1 were mixed to obtain Paint Nos. 2 to 6 and Comparative Pigments No. 1 to No. 2.

* 1: SPC-1000: manufactured by Showa Denko Co.

* 2: Z-250: manufactured by Daicel-Sytec Co.

* 3: Sumipex LG: Sumitomo Chemical Co., Ltd.

* 4: DAA: diacetone alcohol

* 5: DMAc: Dimethylacetamide

[Examples 7 to 12 and Comparative Examples 3 to 4] Production of near infrared ray absorbing filters No. 1 to No. 6 and comparative near infrared ray absorbing filters No. 1 to No. 2

2.5 mL of Comparative Pigment Nos. 1 to 2 obtained in Examples 1 to 6 and Comparative Examples 1 to 2 obtained in Examples 1 to 6 were dropped onto a PET film, 14 < / RTI > bar coater. Thereafter, it was dried at 100 DEG C for 15 minutes to prepare near infrared ray absorbing filters No. 1 to No. 6 and comparative near infrared ray absorbing filters No. 1 to No. 2.

[Evaluation Examples 1 to 6 and Comparative Evaluation Examples 1 and 2] The near infrared ray absorption filters No. 1 to No. 6 and the comparative near infrared ray absorption filters No. 1 to No. 2 were subjected to a light resistance test

Infrared absorbing filters No. 1 to No. 2 obtained in the near infrared ray absorbing filters No. 1 to No. 6 and Comparative Examples 1 and 2 obtained in Examples 1 to 6 were measured with a table line Xenon light resistance tester manufactured by Suga Shikeki Co., Sun) XT-1500L for 25 hours, and the absorbance remaining ratio at 1000 nm was evaluated. The absorbance remaining ratio was calculated as a ratio of the absorbance after the test to the absorbance before the test. The evaluation results are shown in [Table 2].

From the results of the above [Table 2], it is clear that the near-infrared absorbing filter of the present invention has high light resistance.

Claims (4)

A paint comprising an infrared absorbing dye (A), a resin (B), and a solvent (C), wherein the solvent (C) contains diacetone alcohol as an essential component. The method according to claim 1,
Wherein the infrared absorbing dye (A) is a diimmonium compound. 3. The method of claim 2,
Wherein the diimmonium compound is a diimmonium compound represented by the following general formula (I).

(Wherein R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ and R ¹⁸ each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms which may have a substituent, R ¹⁹ , R ²⁰ , R ²¹ and R ²² each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms which may have a substituent or an amino group which may have a substituent, O- or -CH = CH-, t represents a number of 1 to 4, An ^q- represents an anion of q, q represents 1 or 2, p represents a charge retained in a neutral state Coefficient.) A near-infrared absorbing filter formed by using the paint according to any one of claims 1 to 3.