KR20160024476A - Pigment complex, pigment dispersion, light conversion film, and electronic device comprising the same - Google Patents

Abstract

The present invention relates to a pigment complex, a pigment dispersion solution, a photoconversion film, and an electronic device comprising the same. The pigment complex comprises: at least one ring-type derivative of a ring-type oligosaccharide derivative and a cucurbituril derivative; and a pigment clathrated with the ring-type derivative. The pigment complex has improved dispersibility and stability. More specifically, the ring-type derivative is capable of improving effects of the pigment, and manufacturing the pigment dispersion solution at low costs and with high performance.

Description

TECHNICAL FIELD [0001] The present invention relates to a pigment composite, a pigment dispersion, a light conversion film, and an electronic device including the same. BACKGROUND ART [0002]

The present disclosure relates to pigment complexes, pigment dispersions, light conversion films, and electronic devices comprising the same.

The color filter for a liquid crystal display element can be manufactured by a dyeing method, an electrodeposition method, a printing method, and a pigment dispersion method. Among them, the pigment dispersion method is currently widely used due to the excellent chemical resistance, heat resistance and light resistance of the pigment particles, miniaturization of the pigment and development of the pigment dispersion technique.

In recent years, however, techniques for achieving high color reproduction with high luminance, high contrast ratio, and high transmittance have been demanded in accordance with the trend of large-sized and large-sized displays. In addition to the development of stable dyes, More and more is required. The pigment dispersion solution is prepared by using a Millbase dispersion method. In the mill-based dispersion method, the pigment is subjected to a wetting step, a pulverizing step and a dispersion stabilizing step, respectively. In order to prevent aggregation of particles, it is important to control the chemical properties of the pigment particles appropriately by using a dispersing agent. Since ionic and nonionic surfactants used as conventional dispersants have weak physical bonding with the particles, Is not maintained at a nanoscale level, re-aggregation occurs and dispersion stability is difficult to achieve.

In order to overcome such disadvantages, recently, a method of increasing the solubility of a pigment by using pigment particles treated with a carboxyl group or a sulfonic acid surface and maximizing the effect of a dispersant by using a pigment derivative has been used. However, such a dispersion method has a problem that high costs and wastewater are generated, and therefore, a new dispersion method that can achieve simple and high performance is required.

Korean Patent Application Publication No. 2001-0022196

The present specification intends to provide a pigment complex, a pigment dispersion, and a light conversion film, a color filter, and a display comprising the same, which have improved dispersibility and stability.

One embodiment of the present disclosure includes a cyclic derivative of at least one of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment encapsulated in the cyclic derivative.

One embodiment of the present disclosure includes a cyclic derivative of at least one of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment.

Another embodiment of the present disclosure provides a light conversion film comprising the pigment complex or a cured product thereof.

Another embodiment of the present disclosure relates to a cyclic derivative of at least one of cyclic oligosaccharide derivatives and a cooker bitir derivative or a cured product thereof; And a pigment.

Another embodiment of the present invention provides a color filter comprising the light conversion film.

Another embodiment of the present disclosure provides an electronic device comprising the light conversion film.

According to the embodiments of the present invention, by using cyclic derivatives such as cyclic oligosaccharide derivatives or cooker bitir derivatives having glucoside as a basic unit capable of strong chemical / physical bonding with the pigment particles, A pigment solution uniformly dispersed in a solvent can be prepared. Specifically, the cyclic derivative not only serves as a dispersant for the pigment due to the effect of steric hindrance but also improves the effect of the pigment due to strong chemical and / or physical bonding with the pigment and functions as saccharide or cooker bit- It is possible to produce a simple, low-cost and high-performance pigment dispersion.

A light conversion film excellent in light emission efficiency and stability and a color filter using the same can be provided. Further, when such a light conversion film or color filter is used, a display having a clear color and a high color reproducibility can be provided.

1 shows a schematic diagram of a complex of a pigment and a cyclic oligosaccharide derivative.
Figure 2 shows the UV-VIS spectral results of the pigment dispersions prepared in the examples.

Hereinafter, the present invention will be described in detail.

According to one embodiment of the present invention, at least one cyclic derivative of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment encapsulated in the cyclic derivative.

The cyclic oligosaccharide derivative includes a cyclic oligosaccharide itself or a compound in which at least one hydrogen thereof is substituted by another substituent. According to one example, the cyclic oligosaccharide derivative is represented by the following formula (1).

[Chemical Formula 1]

In Formula 1,

R ₁ to R ₃ are the same or different from each other and each independently represents hydrogen, a saturated hydrocarbon group having 1 to 12 carbon atoms, or an unsaturated hydrocarbon group having 2 to 20 carbon atoms, and the carbon or hydrogen of the saturated hydrocarbon group and the unsaturated hydrocarbon group At least one of which may be replaced by nitrogen, oxygen or sulfur, n is an integer from 5 to 10, and the substituents R ₁ to R ₃ in each parenthesis [] are the same or different from each other between the parentheses.

In one example, R ₁ to R ₃ are the same as or different from each other, each independently hydrogen, (meth) acrylate group, a carboxyl group, a hydroxyl group, an amine group, amide group, sulfone group, thiol group, C _{1 - 20} is an alkyl group, or C _{6 -20} aryl group.

The cooker bitrile derivative includes a cooker bitrile itself or a compound in which at least one of the hydrogen thereof is replaced by another substituent. According to one example, the cooker bitrile derivative is represented by the following formula (2).

(2)

In Formula 2, n is an integer of 5 to 10.

In this specification, inclusion means a state in which the pigment is bound to a cyclic derivative by a hydrophobic interaction between pigment molecules in a gap or an internal space formed by a cyclic derivative molecule. Such folds can be formed in various forms, which can be determined by the presence or absence of the functional groups of the cyclic derivative molecule and the pigment, the kind thereof, the molecular size, and the like. Fig. 1 shows a schematic diagram of an example of a pigment composite according to the present invention. As shown in FIG. 1, even when the pigments are aggregates, the pigments can be atomized and dispersed by the cyclic derivatives.

According to one embodiment of the present invention, the pigment may be an inorganic, organic or organic pigment. For example, the pigment includes oxide-based inorganic substances such as silica, iron oxide and zinc oxide, and metals such as silver nanoparticles, palladium nanoparticles, quantum dots, and noble metal minerals. In addition, the pigment may include pigments of a conjugation structure having a chromophore as an organic system, carbon nanotubes, graphene, and the like. In addition, the pigment may include various organic-inorganic pigments in which an organic substance and an inorganic substance are covalently and / or coordinatedly bonded.

The pigment may be present in particulate form, for example the particle size may be in the range of 0.5 - 900 nm.

According to one embodiment of the present disclosure, the mass ratio of the pigment to the cyclic derivative in the pigment complex is 1: X (X = 0.01 - 20).

Compared to conventional linear dispersants, cyclic derivatives which serve to disperse pigments in the present invention Since the volume is larger than the molecular weight, the dispersing effect due to steric hindrance can be maximized.

Another embodiment of the disclosure relates to a cyclic derivative of at least one of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment. The cyclic derivative and the pigment may be present in the form of the pigment complex described above. When present in this form, not only the dispersibility is excellent but also the dispersion stability is excellent, and the effect of the pigment can be improved as described above. According to one example, the mass ratio of the pigment to the cyclic derivative in the pigment dispersion is 1: X (X = 0.01 - 20).

The pigment dispersion may further contain water or an organic solvent in addition to the cyclic derivative and the pigment, and may further include a binder resin, a surfactant, or a polymerizable monomer, if necessary. As the organic solvent, various organic solvents such as tetrahydrofuran, propylene glycol monomethyl ether acetate, dimethylformamide, dimethylsulfoxide, ethanol, acetone, methanol, isopropyl alcohol and the like can be used. As the binder resin, the content described as the binder resin contained in the light conversion film described later may be applied. In addition, the solid content in the pigment dispersion may be from 0.01 to 30% by weight.

According to one embodiment, the pigment dispersion may comprise both water and an organic solvent, wherein the ratio of water to organic solvent may be used in various ratios. For example, the weight ratio of water to organic solvent may be 1: 0.01-100.

According to one embodiment, the pigment dispersion may further comprise a surfactant. When a surfactant is contained in the pigment dispersion, the surfactant may be ionic and / or nonionic Surfactants may be used. The surfactant may serve as an auxiliary agent for increasing the dispersibility of the pigment dispersion in various solvents and may be used in an amount of 0.01 to 200% by weight based on the solid content of the pigment. Examples of the ionic surfactant include dioctyl sodium sulfosuccinate, perfluorooctanesulfonate, alkylbenzene sufonate, sodium dodecylsulfonate, cetyltrimethyl Cations and anions such as cetyltrimethylammonium bromide, benzalonium chloride and cocamidopropyl hydroxysultaine, amphoteric surfactants and nonionic surfactants include polyoxyethylene glycols ( polyoxyethylene glycol, a block copolymer of glucoside alkyl ethers, and a polymeric surfactant having a functional group.

According to one embodiment, the pigment dispersion may further comprise a polymerizable monomer. As the polymerizable monomer, a polymerizable monomer containing a carboxyl group such as styrene and a styrene derivative, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, or monoalkyl maleate may be used. The proportion of the pigment powder to the solvent containing such a polymerizable monomer is suitably from 0.1% by weight to 30% by weight. As the binder resin, a polymerizable monomer containing a carboxyl group such as styrene and a styrene derivative, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, and monoalkyl maleate may be used as the pigment dispersion.

The pigment dispersion containing the surfactant may be dispersed using water instead of an organic solvent.

Such a pigment complex may be prepared by mixing or stirring the pigment and the cyclic derivative. If necessary, cleaning and / or grinding steps may be carried out after production.

In preparing the pigment composite, a solvent may be used. For example, the pigment complex may be prepared by dissolving the respective materials in water, DMF, DMSO, ethanol, methanol, etc., and the solvent may be a mixture of two or more of the above- One mixed solvent may be used.

Another embodiment of the present disclosure provides a light conversion film comprising the pigment complex or a cured product thereof. Another embodiment of the present specification relates to the cyclic derivative or a cured product thereof; And a pigment. The light conversion film may include the pigment complex as it is or may include a cured product of the pigment complex according to a binder resin or other additive added together with the pigment complex.

In addition to the pigment complex, the light conversion film may further include a binder resin or a cured product thereof or an additive, if necessary. For example, the light conversion film may include the pigment composite and, if necessary, a cured product of a composition comprising a binder resin, a polymerizable monomer, a polymerization initiator, and / or a solvent. As a specific example, the light conversion film may comprise a cured product of the composition comprising the pigment complex, the binder resin and the polymerization initiator.

The binder resin may be a photo-curing resin, a thermosetting resin, a thermoplastic resin, or the like. Polymerizable monomers can also be used as the binder resin. Examples of the additives include light stabilizers, hardeners, infrared absorbers, ultraviolet absorbers, antioxidants, surfactants, antistatic agents, flame retardants, lubricants, heavy metal deactivators, hydrotalcites, organic carboxylic acids, colorants, processing aids, , A clarifying agent, a nucleating agent, and a crystallizing agent may be used.

The light conversion film comprising the pigment composite or a cured product thereof may be a film obtained from a resin solution in which the pigment composite is dissolved or dispersed in a binder resin. The light conversion film may be in the form of a filler, a sealant, . The thickness of the light conversion film should be appropriately selected depending on the use and the like, and is not particularly limited, but is preferably selected in the range of 0.1 to 100 mu m.

In order to exhibit a sufficient color conversion effect of the light conversion film, for example, a pigment complex or a pigment and a cyclic derivative may be added to 100 wt% of the binder resin in a proportion of 0.001 to 20 wt% , It is preferable to form the light conversion film having the above-mentioned preferable range of thickness. The amount of the pigment composite used is preferably such that the absorbance at the? _Max of the light conversion film is 0.01 to 1.0.

A substrate may be provided on one surface of the light conversion film. The substrate is not particularly limited as long as it is known in the art. In consideration of the possibility that the substrate will be contained in the final product without removing the substrate in the future, it is preferable that the substrate is optically transmissive, and for example, glass, quartz, sapphire, or plastic substrate can be used.

According to one example, the light conversion film comprises: 1) preparing a composition comprising the above-described pigment complex and a binder resin; 2) applying the composition on a substrate and drying if necessary to form a film; And 3) curing the film formed on the substrate. If necessary, the film may be applied in the form of a pattern in the step 2), or a step of patterning the film during or after the step 3) may be further performed.

In the above step (1), the composition may further comprise a polymerizable monomer, a polymerization initiator and / or a solvent if necessary. The composition may be prepared by mixing the pigment complex and the binder resin, and optionally further components. For example, the components may be dissolved or dispersed in a solvent to prepare a composition.

In the step 2), the composition may be uniformly applied on the substrate to a thickness of about 0.1 to 200 micrometers, and the coating thickness may be adjusted as needed. For example, the composition may be applied to a port support or a temporary support by a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method, a spin coating method or an extrusion coating method A method of forming a coating film on the substrate can be used.

In the step 2), after the composition is applied onto the substrate, a drying process may be performed to remove the remaining solvent. The drying can be carried out, for example, by drying at 70-150 DEG C for at least 30 seconds. When the drying temperature is 70 ° C or higher, sufficient drying can be performed to prevent occurrence of stains and deformation of the coating. When the drying temperature is 150 캜 or less, deformation of the substrate can be prevented even when a plastic substrate is used, and bubbles due to evaporation of a solvent can be prevented.

In the step 3), the curing may be determined depending on the pigment complex or the binder resin, and curing may be performed, for example, by ultraviolet irradiation. The ultraviolet ray irradiation may be performed in an atmosphere or under a nitrogen atmosphere in order to increase the reaction efficiency. For example, an ultraviolet ray irradiator may be a medium pressure or high pressure mercury ultraviolet lamp or metal halide lamp having an intensity of 80 w / cm or more.

As the binder resin, a thermosetting resin, a photo-curing resin, or a thermoplastic resin may be used, and a water-soluble polymer is preferably used. Two or more kinds of binder resins may be used together. Examples of usable binder resins include cellulose derivatives such as methyl cellulose (MC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC) and hydroxypropyl cellulose (HPC); Polyvinyl pyrrolidone (PVP), polyacrylic acid, polystyrenesulfonic acid (PSSA), polysilicic acid, polyphosphoric acid, polyacrylic acid, polyacrylic acid, Poly (4-vinylphenylsulfonic acid), polyethylenephosphoric acid, polymaleic acid, poly (2-methacryloxypropyl) -polyethersulfonic acid, poly (3-methacryloyloxypropane-1-sulfonic acid), poly (4-vinylbenzoic acid), polyethyleneimine (PEI), polyamines, polyamide amine (PAMAM) (Polydiene), poly (vinylidene chloride), polydiaryldimethylammonium chloride (PDADMAC), poly (4-vinylbenzyltrimethylammonium salt), poly [(dimethylimino) trimethylene (dimethylimino) hexamethylene dibromide] Poly (vinylamine salt), poly (2-vinylpyridine) and n-alkyl (quaternary) Derivatives of cellulose, cellulose esters such as diacetylcellulose, triacetylcellulose (TAC), propionylcellulose, butyrylcellulose, acetylpropionylcellulose and nitrocellulose; Polyamide; Polycarbonate; Polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate, polybutyl Polyesters such as polyethylene terephthalate, polyesters such as polyethylene terephthalate, polyesters such as polystyrene, polyethylene, polypropylene and polymethylpentene; Acrylic resins such as polymethyl methacrylate; Polycarbonate; Polysulfone; Polyethersulfone; Polyether ketones; Polyetherimide; Polyoxyethylene; Norbornene resin; But are not limited to, ethylene-vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), and the like.

Examples of the binder resin include cellulose derivatives such as methyl cellulose (MC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), and hydroxypropyl cellulose (HPC) as water-soluble polymers; Polyvinyl pyrrolidone (PVP), polyacrylic acid, polystyrenesulfonic acid (PSSA), polysilicic acid, polyphosphoric acid, polyacrylic acid, polyacrylic acid, Poly (4-vinylphenylsulfonic acid), polyethylenephosphoric acid, polymaleic acid, poly (2-methacryloxypropyl) -polyethersulfonic acid, poly (3-methacryloyloxypropane-1-sulfonic acid), poly (4-vinylbenzoic acid), polyethyleneimine (PEI), polyamines, polyamide amine (PAMAM) (Polydiene), poly (vinylidene chloride), polydiaryldimethylammonium chloride (PDADMAC), poly (4-vinylbenzyltrimethylammonium salt), poly [(dimethylimino) trimethylene (dimethylimino) hexamethylene dibromide] Poly (vinylamine salt), poly (2-vinylpyridine) and n-alkyl (quaternary) Derivatives and the like can be used. As the binder, a polymerizable monomer containing a carboxyl group such as styrene and a styrene derivative, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, and monoalkyl maleate may be used.

 The content of the binder resin is 0.1 to 30% by weight, for example, 0.1 to 20% by weight, preferably 0.1 to 10% by weight, based on the total weight of the entire light conversion film composition. When the content of the binder resin is 0.1 wt% or more, the thickness of the light conversion film is easily controlled. When the content of the binder resin is 20 wt% or less, excessive viscosity increase can be prevented, uniform coating can be maintained, and reduction in light transmittance can be prevented.

As the polymerizable monomer, a compound having at least one ethylenic unsaturated group may be used. As the polymerizable monomer, a polymerizable monomer acts to induce a crosslinking reaction between the polymerizable monomer and the binder resin. Examples of the polymerizable monomer include, but are not limited to, aldehydes, dialdehydes, and isocyanates. Examples of the aldehydes or dialdehydes include, but are not limited to, acrylic aldehyde, oxaldehyde, 2-methylacrylaldehyde, 2-oxopropane, and glutaraldehyde. Examples of isocyanates include, but are not limited to, 2-isocyanatoethyl 2-methylacrylate, 1,4-diisocyanatobutane, 1,4-diisocyanatobenzene, 1,3-diisocyanatobenzene And the like. The polymerizable monomer may be used alone or in a mixture of two or more.

The content of the polymerizable monomer is preferably 0.01 to 2% by weight, and more preferably 0.01 to 1% by weight, based on the weight of the entire light conversion film composition. When the content of the polymerizable monomer is 0.01% by weight or more, a sufficient crosslinking reaction can be induced, so that the durability can be prevented from decreasing. When the content is 2% by weight or less, the viscosity of the light conversion film composition is prevented from increasing with time Which is advantageous for solution stability and uniform application.

Or when it is necessary to perform patterning accompanied by wet etching, the pigment complex according to the present invention is added to a composition comprising the above-mentioned pigment complex and a curable resin (resist) for photocurable or photo heat combination Pattern can be manufactured. In this case, the cured product of the photo-curable or photo-thermal combination type curable resin functions as a binder of the photo-conversion filter after patterning. Further, in order to facilitate the patterning, it is preferable that the curable resin for photocuring or photo-thermal combination is soluble in an organic solvent or an alkali solution in an unexposed state. Specific examples of the photo-curing or photo-thermal combination type resin composition that can be used include (1) a composition comprising an acrylic polyfunctional monomer and / or oligomer having a plurality of acryloyl groups or methacryloyl groups and an optical or thermal polymerization initiator (2) a composition comprising a polyvinyl cinnamate ester, a polyfunctional monomer and / or an oligomer, and a photo or thermal polymerization initiator, (3) a composition comprising a chain or cyclic olefin and bisazide And crosslinking the olefin), and (4) a composition comprising a monomer having an epoxy group and an acid generator, and the like. In particular, a composition comprising (1) the acrylic polyfunctional monomer and / or oligomer and the photo or thermal polymerization initiator is capable of patterning a fixed chain and, after polymerization and curing, has high reliability such as solvent resistance and heat resistance, Do.

As the polymerization initiator, a photoinitiator or a thermal decomposition agent may be used depending on the kind of the binder resin. The photoinitiator may be any water-soluble polymer as long as it can induce a radical reaction. When the water-soluble polymer is used as the binder resin, it is more preferably water-soluble. Examples of photoinitiators include, but are not limited to, IRGACURE 2959, 2-hydroxy-1- [4- (2-hydroxyethoxy) phenyl] -2 (IRGACURE 500, 1-hydroxy-cyclohexyl-phenyl-ketone and benzophenone), IGACURE 754 (IRGACURE 754, oxy- phenyl- acetic acid 2- [2-oxo- 2-phenyl-acetoxy-ethoxy] -ethyl ester and oxy-phenyl-acetic 2- [2-hydroxy-ethoxy] -ethyl ester).

The content of the photoinitiator is more preferably 0.01 to 5% by weight, and more preferably 0.01 to 2% by weight based on the total weight of the light conversion film composition. If the content of the photoinitiator is less than 0.01% by weight, the effect of the crosslinking reaction is unlikely. If the content exceeds 5% by weight, the permeability is significantly reduced.

The solvent is not particularly limited as long as it does not react with the components of the composition and imparts fairness thereto. Examples of the solvent include water, alcohols, diols, ketones, esters, ethers, aliphatic or alicyclic hydrocarbons Aromatic hydrocarbons, hydrocarbons having a cyano group, halogenated aromatic hydrocarbons, and the like, and a mixed solvent of these may be used.

Another embodiment of the disclosure relates to a cyclic derivative of at least one of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment. Here, at least one or more particles of the pigment are contained in the cyclic derivative. The binder resin, the additive, and the manufacturing method described in the previous embodiment can be applied to the light conversion film in the present embodiment.

For example, according to the above-described embodiments, it is possible to provide a light conversion film that converts light emitted from a single-color LED chip into a white LED having high color purity and high color reproducibility.

The thickness of the light conversion film according to the above-described embodiment can be selected as required, and can be, for example, 0.1 to 50 micrometers in thickness.

According to one embodiment of the present disclosure, the light conversion film can be patterned. According to one example, the light conversion film may be patterned and used as a color filter.

According to one embodiment of the present disclosure, the light conversion film may be applied to a backlight unit. For example, on the front surface of an edge-type or direct-type light source. The edge type light source includes light emitting means provided on a side surface and a light guide plate for diffusing light emitted from the light emitting means.

The light conversion film may further include a protective layer or an insulating oxide film if necessary. A protective layer may be included, and a light-scattering film may be included. The light scattering film may scatter light when the light source passes through the film so that the pigment receives a lot of light.

The light conversion film may be used not only as a display or an illumination device described below, but also as an energy collection film for a solar cell when converting visible light into a near-infrared light region through light conversion.

According to one embodiment of the present disclosure, there is provided an electronic device including the light conversion film. The electronic device is not particularly limited as long as a light conversion film is required. For example, the electronic device may be a lighting device or a display device including the light conversion film, a color filter, or a backlight unit, or a solar cell.

The embodiments described herein are illustrated by way of example. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

Example  One)

Cyclic oligosaccharide (substituent R ₁ to R ₃ in the formula (1) is hydrogen and n = 7) is added to 5 ml of distilled water and 5 ml of tetrahydrofuran, and the mixture is stirred for 10 minutes. 20 mg of pigment is added and sonication is performed at 25-50 ° C for 6 hours, followed by ball milling for 1 day. Finally, the powder is filtered and dried at 80 ° C. The distilled water / tetrahydrofuran solvent may be used in various ratios.

Example  2)

To 10 ml of propylene glycol monomethyl ether acetate is added cyclic oligosaccharide (substituent R ₁ to R ₃ are hydrogen and n = 7 in formula (1)) and stirred for 10 minutes. 20 mg of pigment is added and sonication is performed at 25-50 ° C for 6 hours, followed by ball milling for 1 day. Finally, the powder is filtered and dried at 80 ° C. Various organic solvents such as dimethylformamide, dimethylsulfoxide, and the like other than propylene glycol monomethyl ether acetate may be used.

Example  3)

0.5 g of each of the pigment powders prepared in Examples 1 and 2 was added to 5 g of propylene glycol monomethyl ether acetate containing an acrylate derivative binder for film formation, followed by ball milling for 24 hours. After ball milling, the film was spin - coated on the glass at a speed of 500 rpm to prepare a film with a color filter. The film was then measured by U V - V S s p e c tr u m. As the binder, a polymerizable monomer containing a carboxyl group such as styrene and a styrene derivative, methacrylic acid, itaconic acid, maleic acid, maleic anhydride, and monoalkyl maleate may be used. The ratio of the pigment powder to the solvent containing the binder is suitably 0.1 wt% to 30 wt%.

The UV-VIS absorption spectrum of the film prepared in Example 3 was measured. As a result, it was confirmed that the film had a high absorptance at 580 nm or more and a high transmittance at 480 nm at 90%, which is shown in FIG.

Claims (20)

At least one cyclic derivative of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment encapsulated in the cyclic derivative. The pigment composite according to claim 1, wherein the cyclic oligosaccharide derivative is represented by the following formula (1).
[Chemical Formula 1]

In Formula 1,
R ₁ to R ₃ are the same or different from each other and each independently represents hydrogen, a saturated hydrocarbon group having 1 to 12 carbon atoms, or an unsaturated hydrocarbon group having 2 to 20 carbon atoms, and the carbon or hydrogen of the saturated hydrocarbon group and the unsaturated hydrocarbon group At least one of which may be replaced by nitrogen, oxygen or sulfur, n is an integer from 5 to 10, and the substituents R ₁ to R ₃ in each parenthesis [] are the same or different from each other between the parentheses. The pigment composite according to claim 1, wherein the cooker bitrile derivative is represented by the following formula (2):
(2)

In Formula 2, n is an integer of 5 to 10. The pigment composite according to claim 1, wherein the pigment comprises at least one selected from the group consisting of organic pigments, inorganic pigments and organic-inorganic pigments. The pigment composite of claim 1, wherein the mass ratio of the pigment to the cyclic derivative in the pigment complex is 1: X (X = 0.01-20). At least one cyclic derivative of a cyclic oligosaccharide derivative and a cooker bitir derivative; And a pigment. The pigment dispersion according to claim 6, wherein the cyclic oligosaccharide derivative is represented by the following formula (1).
[Chemical Formula 1]

In Formula 1,
R ₁ to R ₃ are the same or different from each other and each independently represents hydrogen, a saturated hydrocarbon group having 1 to 12 carbon atoms, or an unsaturated hydrocarbon group having 2 to 20 carbon atoms, and the carbon or hydrogen of the saturated hydrocarbon group and the unsaturated hydrocarbon group At least one of which may be replaced by nitrogen, oxygen or sulfur, n is an integer from 5 to 10, and the substituents R ₁ to R ₃ in each parenthesis [] are the same or different from each other between the parentheses. 7. The pigment dispersion according to claim 6, wherein the cooker bitrile derivative is represented by the following formula (2)
(2)

In Formula 2, n is an integer of 5 to 10. [Claim 7] The pigment dispersion according to claim 6, wherein the pigment comprises at least one selected from the group consisting of organic pigments, inorganic pigments and organic-inorganic pigments. 7. The pigment dispersion according to claim 6, wherein the mass ratio of the pigment to the cyclic derivative in the pigment dispersion is 1: X (X = 0.01-20). 7. The pigment dispersion of claim 6, wherein the pigment dispersion further comprises water, an organic solvent, or water and an organic solvent. 7. The pigment dispersion of claim 6, wherein the pigment dispersion further comprises a binder resin, a surfactant, or a polymerizable monomer. A light conversion film comprising the pigment composite according to any one of claims 1 to 5 or a cured product thereof. 14. The light conversion film according to claim 13, wherein the light conversion film comprises a cured product of a composition comprising a binder resin and a polymerization initiator. 14. The light conversion film according to claim 13, comprising a substrate provided on one surface of the light conversion film. At least one cyclic derivative of cyclic oligosaccharide derivative and cooker bitir derivative or a cured product thereof; And a pigment. 17. The light conversion film according to claim 16, wherein the light conversion film comprises a cured product of a composition comprising a binder resin and a polymerization initiator. 17. The light conversion film according to claim 16, comprising a substrate provided on one surface of the light conversion film. A color filter comprising a light conversion film according to claim 13. An electronic device comprising a light conversion film according to claim 13.

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