KR102432565B1 - Modified metal oxide nano particle dispersion composition prepared using the same and method for preparing the same - Google Patents

Abstract

The present invention relates to a surface-modified metal oxide nanoparticle dispersion composition and a method for preparing the same, and the surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention comprises: metal oxide particles surface-modified with a phosphoric acid-based compound; acrylate-based monomers; and a silane coupling agent.

Description

Surface-modified metal oxide nanoparticle dispersion composition and manufacturing method thereof

The present invention relates to a surface-modified metal oxide nanoparticle dispersion composition and a method for preparing the same.

Optically transparent polymer materials are widely used as optical coatings and optoelectronic materials because of their low cost, good processability, and high transmittance in the visible region. Recently, transparent materials with high refractive index have been used as materials for optical filters, lenses, reflectors, optical waveguides, antireflection films, solar cells, and light emitting diodes (LEDs).

However, these polymers have a refractive index (n) of 1.3 to 1.7, and since it is difficult to implement a high refractive index only with a polymer material, research on mixing and dispersing an inorganic material having a high refractive index (n = 1.5 to 2.7) with a polymer is in progress. have.

Materials used as high refractive inorganic materials include TiO ₂ (n=2.5~2.7), ZrO ₂ (n=2.1~2.2), ZnO (n=2.0), SnO ₂ (n=2.0), SiO ₂ (n= 1.5) exists.

Among the high refractive inorganic materials, ZrO ₂ particles are particles having a high refractive index, but when manufactured into a film, a yellowing phenomenon occurs, and when applied to a display, there is a problem in that the color is lowered and visibility is lowered.

Therefore, it is necessary to research and develop a titania dispersion capable of reducing yellowing of a film while implementing a high refractive index.

The present invention is to solve the above problems, and an object of the present invention is to provide a surface-modified metal oxide nanoparticle dispersion composition capable of reducing yellowing with high transparency while implementing a high refractive index and a method for preparing the same will do

Another object of the present invention is to provide a film composition capable of reducing yellowing with high transparency while having a high refractive index, and an optical film prepared using the same.

However, the problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention comprises: metal oxide particles surface-modified with a phosphoric acid-based compound; acrylate-based monomers; and a silane coupling agent.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may have a tetragonal single crystal phase.

According to an embodiment, the metal oxide particles are ZrO ₂ , SiO ₂ , TiO ₂ , SrTiO ₂ , MgO, Ta ₂ O ₅ , ZrO ₂ -TiO ₂ and SiO ₂ -Fe ₂ O ₃ selected from the group consisting of It may include at least one.

According to one embodiment, the phosphoric acid-based compound, phosphoric acid ester (phosphoric acid ester), alkenyl polyethylene glycol ether phosphate (Alkenyl polyethylene glycol ether phosphate), an alkylolammonium salt of a copolymer having an acidic group (Alkylolammonium salt a copolymer with acidic groups), phosphate (Phosphoric acid salt), poly(oxy-1,2-ethanediyl), α-isotridecyl-ω-hydroxy-phosphate (Poly(oxy-1,2-ethanediyl), alpha-isotridecyl -omega-hydroxy- phosphate), phosphoric acid ester salt of a copolymer, polyoxyethylene tridecyl ether phosphate, polyether phosphate, cationic fatty acid phosphate ester, polyoxy It may include at least one selected from the group consisting of ethylene lauryl ether phosphate esters and phosphate esters.

According to one embodiment, the phosphoric acid ester is triethyl phosphate, tris- (2-diethylamino-ethyl) phosphate, tris- (2-dimethylamino-ethyl) phosphate, tridimethylaminomethyl phosphate, tridiethylamino Methylphosphate, bis-(2-dimethylamino-ethyl)methyl)-phosphonate, bis-(2-diethylamino-ethyl)methyl-phosphonate, di-diethylaminomethylmethyl-phosphonate, tri At least any one selected from the group consisting of ethylaminophosphate, diethylamino methylaminophosphate, dimethylamino ethylaminophosphate, diethylaminomethyl dimethylphosphate, 2-diethylamino-ethyldimethylphosphate and 2-dimethylamino-ethyldimethylphosphate It may include one.

According to one embodiment, according to an embodiment, the surface-modified metal oxide particles with the phosphoric acid-based compound may have a molar ratio of a metal and a phosphoric acid group of the metal oxide of 1:0.04 to 1:0.12.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may have an average particle diameter of 5 nm to 20 nm.

According to one embodiment, the surface-modified metal oxide particles with the phosphoric acid-based compound may be 20 wt% to 60 wt% of the surface-modified metal oxide nanoparticle dispersion composition.

According to an embodiment, the acrylate-based monomer is 3-(phenoxyphenyl)methylpropyl-2-enoate (3-(phenoxyphenyl)methyl prop-2-enoate; PBA), methyl acrylate, ethyl acryl Rate, propyl acrylate, isopropyl acrylate, butyl acrylate, isobutyl acrylate, t-butyl acrylate, pentyl acrylate, isopentyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, nonyl acrylate , isononyl acrylate, dodecyl acrylate, stearyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, isobutyl methacrylate, t- Butyl methacrylate, pentyl methacrylate, isopentyl methacrylate, 2-ethylhexyl methacrylate, isooctyl methacrylate, nonyl methacrylate, isononyl methacrylate, dodecyl methacrylate, stearyl methacrylate Krylate, 2-ethoxyethoxyethyl acrylate, 2-ethoxyethoxyethyl methacrylate, methoxyethyl acrylate, methoxyethyl methacrylate, 2-phenoxyethyl acrylate, ethoxylate phenoxy one selected from the group consisting of acrylate, 3,3,5-trimethylcyclohexane acrylate, cyclic triethylpropane formal acrylate, benzyl acrylate, isobornyl acrylate, cyclohexyl acrylate and biphenylmethyl acrylate It may include more than one.

According to an embodiment, the acrylate-based monomer may be 40 wt% to 60 wt% of the surface-modified metal oxide nanoparticle dispersion composition.

According to an embodiment, the silane coupling agent is γ-methacryloxypropyltrimethoxysilane, 4-aminobutylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, N-2-aminoethyl-3- Aminopropyldiethylisopropoxysilane, (mercaptomethyl)dimethylethoxysilane, di-4-mercaptobutyldimethoxysilane, 3-mercaptopropyltriisopropoxysilane, 3-methacryloxypropyldimethylethoxy Silane, 3-acryloxypropyltrimethoxysilane, (3-glycidoxypropyl)methyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropyltrimethoxysilane , 4-Bromobutylmethyldibutoxysilane, 5-iodohexyldiethylmethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isothiocyanatepropylmethyldimethoxysilane, 3-hydroxybutylisopropyl Dimethoxysilane, bis(2-hydroxyethyl)-3-aminopropyltriethoxysilane, bromophenyltrimethoxysilane, (2-(iodophenyl)ethyl)ethyldimethoxysilane, bis(chloromethylphenyl) Dimethoxysilane, bromomethylphenyldimethylisopropoxysilane, bis(propyltrimethoxysilane)carbodiimide, N-ethyl-N-(propylethoxydimethoxysilane)-carbodiimide, 3-(trime Toxysilyl)propanol, (3,5-hexadione)triethoxysilane, 3-(trimethoxysilyl)propylacetoacetate, 3-(trimethoxysilyl)propylmethacrylate silane, 3-aminopropyltrimethyl Toxysilane, 2-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, 3- Ureidepropyltrimethoxysilane, N-ethoxycarbonyl-3-aminopropyltrimethoxysilane, N-triethoxysilylpropyltriethylenetriamine, N-trimethoxysilylpropyltriethylenetriamine, 10- Trimethoxysilyl-1,4,7-triazodecane, 10-triethoxysilyl-1,4,7-triazodecane, 9-trimethoxysilyl-3,6-azononylacetate, 3-( Triethoxysilyl)propylsuccinic anhydride, N-benzyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-bis-oxyethylene-3-aminopropyltrimethoxysilane and (methacryloxy)propyltrimethoxysilane It may include one or more selected from the group consisting of.

According to an embodiment, the silane coupling agent may be 5 to 20 parts by weight based on 100 parts by weight of the surface-modified metal oxide nanoparticles.

According to an embodiment, the surface-modified metal oxide nanoparticle dispersion composition may have a liquid refractive index of 1.67 or more, and a yellowness (Y.I) of less than 30.

According to one embodiment, the surface-modified metal oxide nanoparticle dispersion composition may have a transmittance of 55% or more and a haze of 15% or less.

A method for preparing a surface-modified metal oxide nanoparticle dispersion composition according to another embodiment of the present invention includes the steps of: preparing surface-modified metal oxide nanoparticles; preparing a mixed solution by adding the surface-modified metal oxide nanoparticles to a solution in which a silane coupling agent is dissolved in an organic solvent; preparing a surface-modified metal oxide nanoparticle-organic solvent dispersion by adding beads to the mixed solution and dispersing the surface-modified metal oxide nanoparticles; and adding an acrylate-based monomer to the surface-modified metal oxide nanoparticles-organic solvent dispersion and removing the organic solvent.

According to an embodiment, the preparing of the surface-modified metal oxide nanoparticles may include adding the metal oxide nanoparticles to an aqueous solution of a phosphoric acid-based compound to form a reactant; and washing and drying the formed reactant, and pulverizing the reactant.

The film composition according to another embodiment of the present invention is a surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention or a surface-modified metal oxide nano prepared by a manufacturing method according to another embodiment of the present invention. particle dispersion compositions; UV photoinitiators; and a monomer for UV curing.

According to one embodiment, the UV photoinitiator, an onium salt-based, diazonium salt-based, sulfonium salt-based compound and an imidazole-based photocationic initiator selected from; and thioxanthone-based, phosphorus-based, triazine-based, benzophenone-based, benzoin-based, oxime-based, propanone-based, amino ketone-based, ketone-based, benzoin ether acetophenone-based, anthraquinone-based and aromatic phosphine oxide-based compounds It may include one or more selected from the group consisting of a radical photoinitiator.

According to an embodiment, the UV curing monomer is glycidyl acrylate, glycidyl methacrylate, glycidyl methacrylate, glycidyl-alpha-ethyl acrylate, glycidyl-alpha-ene -Propyl acrylate, glycidyl-alpha-butyl acrylate, 3,4-epoxybutyl methacrylate, 3,4-epoxybutyl acrylate, 6,7-epoxypeptyl methacrylate, 6,7-epoxyheptyl Acrylate, 6,7-epoxyheptyl-alpha-ethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyethyl meta It may include one or more selected from the group consisting of acrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, and trimethylpropane triacrylate.

The optical film according to another embodiment of the present invention is prepared by UV curing the film composition according to an embodiment of the present invention, and has a yellowness value (Y.I) of less than 30.

The surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention contains metal oxide particles surface-modified with a phosphoric acid-based compound of 20 nm or less to implement high refractive index and high transparency, and yellowness (Y.I) has a reduced effect.

The film composition according to an embodiment of the present invention has the effect of forming an optical film with reduced yellowness while implementing high refractive index and high transparency.

1 is a FT-IR analysis result of ZrO ₂ and phosphate surface-modified ZrO ₂ particles.
Figure 2 is ZrO ₂ , phosphate surface-modified ZrO ₂ particles, tetragonal (Tetragonal) and monoclinic (Monoclinic) XRD analysis results.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

Terms used in the examples are used for the purpose of description only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are assigned the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms.

Components included in one embodiment and components having a common function will be described using the same names in other embodiments. Unless otherwise stated, descriptions described in one embodiment may be applied to other embodiments as well, and detailed descriptions within the overlapping range will be omitted.

The surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention comprises: metal oxide particles surface-modified with a phosphoric acid-based compound; acrylate-based monomers; and a silane coupling agent.

The surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention contains metal oxide particles surface-modified with a phosphoric acid-based compound of 20 nm or less to implement high refractive index and high transparency, and yellowness (Y.I) has a reduced effect.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may have a tetragonal single crystal phase. The metal oxide particles surface-modified with the phosphoric acid-based compound according to the present invention are surface-modified with phosphate during manufacturing, and are chemically surface-modified metal oxide particles rather than surface coating.

When the metal oxide particles according to the present invention are surface-modified with phosphate, they are synthesized from a monoclinic and tetragonal mixed crystal phase to a tetragonal single crystal phase.

According to an embodiment, the metal oxide particles serve to provide high luminance functionality.

According to an embodiment, the metal oxide particles are ZrO ₂ , SiO ₂ , TiO ₂ , SrTiO ₂ , MgO, Ta ₂ O ₅ , ZrO ₂ -TiO ₂ and SiO ₂ -Fe ₂ O ₃ selected from the group consisting of It may include at least one. Preferably, the metal oxide particles may be zirconia. The zirconia particles have a high refractive index, substantially no photocatalytic activity, and excellent light resistance and weather resistance.

According to one embodiment, the phosphoric acid-based compound, phosphoric acid ester (phosphoric acid ester), alkenyl polyethylene glycol ether phosphate (Alkenyl polyethylene glycol ether phosphate), an alkylol ammonium salt of a copolymer having an acidic group (Alkylolammonium salt a copolymer with acidic groups), phosphate (Phosphoric acid salt), poly(oxy-1,2-ethanediyl), α-isotridecyl-ω-hydroxy-phosphate (Poly(oxy-1,2-ethanediyl), alpha-isotridecyl -omega-hydroxy- phosphate), phosphoric acid ester salt of a copolymer, polyoxyethylene tridecyl ether phosphate, polyether phosphate, cationic fatty acid phosphate ester, polyoxy It may include at least one selected from the group consisting of ethylene lauryl ether phosphate esters and phosphate esters.

According to one embodiment, the phosphoric acid ester is triethyl phosphate, tris- (2-diethylamino-ethyl) phosphate, tris- (2-dimethylamino-ethyl) phosphate, tridimethylaminomethyl phosphate, tridiethylamino Methylphosphate, bis-(2-dimethylamino-ethyl)methyl)-phosphonate, bis-(2-diethylamino-ethyl)methyl-phosphonate, di-diethylaminomethylmethyl-phosphonate, tri At least any one selected from the group consisting of ethylaminophosphate, diethylamino methylaminophosphate, dimethylamino ethylaminophosphate, diethylaminomethyl dimethylphosphate, 2-diethylamino-ethyldimethylphosphate and 2-dimethylamino-ethyldimethylphosphate It may include one.

According to an embodiment, the commercially available products of the phosphoric acid-based compound include BYK's trade names: DISPER BYK-102, DISPER BYK-103, DISPER BYK-106, DISPER BYK-110, DISPER BYK-111, DISPER BYK-118 or DISPER BYK. 180, etc. can be used.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may use commercially available particles, and at least one synthesis method selected from the group consisting of a hydrothermal synthesis method, a sol-gel method, a solid-phase method, and a supercritical method. can be synthesized using Preferably, the metal oxide particles surface-modified with the phosphoric acid-based compound may be synthesized by a hydrothermal synthesis method.

According to an embodiment, the surface-modified metal oxide particles with the phosphoric acid compound may have a molar ratio of a metal and a phosphoric acid group of the metal oxide of 1:0.04 to 1:0.12. Based on the metal molar content of the metal oxide, when the molar content of the metal and the phosphoric acid group of the metal oxide is included in less than 1: 0.04, the effect of improving yellowness may be insignificant, and when included in excess of 1: 0.12, the content of the phosphoric acid group As this increases, particle refractive index loss may occur.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may have an average particle diameter of 5 nm to 20 nm. If the average particle diameter of the metal oxide particles surface-modified with the phosphoric acid-based compound is less than 5 nm, dispersion may be difficult due to an increase in the surface energy of the particles, and if it exceeds 20 nm, aggregation occurs, resulting in poor coating appearance, The thickness of the film becomes thick and a problem that the refractive index is lowered may occur.

According to one embodiment, the surface-modified metal oxide particles with the phosphoric acid-based compound may be 20 wt% to 60 wt% of the surface-modified metal oxide nanoparticle dispersion composition. When the amount of the surface-modified metal oxide particles with the phosphoric acid-based compound is less than 20% by weight of the surface-modified metal oxide nanoparticle dispersion composition, the luminance of the curable composition is lowered and the optical properties of the cured film produced in the post-process are lowered. If it exceeds 60% by weight, the dispersion interval between the metal oxide particles is extremely low, so that the viscosity of the dispersion is excessively increased, and aggregation between the metal oxide particles may occur.

According to an embodiment, the acrylate-based monomer may exhibit excellent moldability, processability, and mechanical properties when forming a film.

According to an embodiment, the acrylate-based monomer is 3-(phenoxyphenyl)methylpropyl-2-enoate (3-(phenoxyphenyl)methyl prop-2-enoate; PBA), methyl acrylate, ethyl acryl Rate, propyl acrylate, isopropyl acrylate, butyl acrylate, isobutyl acrylate, t-butyl acrylate, pentyl acrylate, isopentyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, nonyl acrylate , isononyl acrylate, dodecyl acrylate, stearyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, isobutyl methacrylate, t- Butyl methacrylate, pentyl methacrylate, isopentyl methacrylate, 2-ethylhexyl methacrylate, isooctyl methacrylate, nonyl methacrylate, isononyl methacrylate, dodecyl methacrylate, stearyl methacrylate Krylate, 2-ethoxyethoxyethyl acrylate, 2-ethoxyethoxyethyl methacrylate, methoxyethyl acrylate, methoxyethyl methacrylate, 2-phenoxyethyl acrylate, ethoxylate phenoxy one selected from the group consisting of acrylate, 3,3,5-trimethylcyclohexane acrylate, cyclic triethylpropane formal acrylate, benzyl acrylate, isobornyl acrylate, cyclohexyl acrylate and biphenylmethyl acrylate It may include more than one.

According to an embodiment, the acrylate-based monomer may be 40 wt% to 60 wt% of the surface-modified metal oxide nanoparticle dispersion composition. When the acrylate-based monomer is less than 40% by weight of the surface-modified metal oxide nanoparticle dispersion composition, the content of the surface-modified metal oxide nanoparticles in the dispersion is relatively increased to increase the viscosity and increase the yellowness, When it exceeds 60% by weight, the content of the surface-modified metal oxide nanoparticles may be relatively reduced, thereby reducing the refractive index and luminance characteristics of the film.

According to an embodiment, the silane coupling agent is γ-methacryloxypropyltrimethoxysilane, 4-aminobutylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, N-2-aminoethyl-3- Aminopropyldiethylisopropoxysilane, (mercaptomethyl)dimethylethoxysilane, di-4-mercaptobutyldimethoxysilane, 3-mercaptopropyltriisopropoxysilane, 3-methacryloxypropyldimethylethoxy Silane, 3-acryloxypropyltrimethoxysilane, (3-glycidoxypropyl)methyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropyltrimethoxysilane , 4-Bromobutylmethyldibutoxysilane, 5-iodohexyldiethylmethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isothiocyanatepropylmethyldimethoxysilane, 3-hydroxybutylisopropyl Dimethoxysilane, bis(2-hydroxyethyl)-3-aminopropyltriethoxysilane, bromophenyltrimethoxysilane, (2-(iodophenyl)ethyl)ethyldimethoxysilane, bis(chloromethylphenyl) Dimethoxysilane, bromomethylphenyldimethylisopropoxysilane, bis(propyltrimethoxysilane)carbodiimide, N-ethyl-N-(propylethoxydimethoxysilane)-carbodiimide, 3-(trime Toxysilyl)propanol, (3,5-hexadione)triethoxysilane, 3-(trimethoxysilyl)propylacetoacetate, 3-(trimethoxysilyl)propylmethacrylate silane, 3-aminopropyltrimethyl Toxysilane, 2-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, 3- Ureidepropyltrimethoxysilane, N-ethoxycarbonyl-3-aminopropyltrimethoxysilane, N-triethoxysilylpropyltriethylenetriamine, N-trimethoxysilylpropyltriethylenetriamine, 10- Trimethoxysilyl-1,4,7-triazodecane, 10-triethoxysilyl-1,4,7-triazodecane, 9-trimethoxysilyl-3,6-azononylacetate, 3-( Triethoxysilyl)propylsuccinic anhydride, N-benzyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-bis-oxyethylene-3-aminopropyltrimethoxysilane and (methacryloxy)propyltrimethoxysilane It may include one or more selected from the group consisting of.

According to an embodiment, the silane coupling agent may be 5 to 20 parts by weight based on 100 parts by weight of the surface-modified metal oxide nanoparticles. When the silane coupling agent is less than 5 parts by weight with respect to 100 parts by weight of the surface-modified metal oxide nanoparticles, dispersion of the particles may not be easy, and when it exceeds 20 parts by weight, optical properties may be reduced during film formation. .

According to an embodiment, the surface-modified metal oxide nanoparticle dispersion composition may have a liquid refractive index of 1.67 or more, and a yellowness (Y.I) of less than 30.

The surface-modified metal oxide nanoparticle dispersion composition according to the present invention has an effect of remarkably improving yellowness compared to a dispersion composition using non-surface-modified zirconia particles while implementing a high refractive index of 1.67 or more.

According to one embodiment, the surface-modified metal oxide nanoparticle dispersion composition may have a transmittance of 55% or more and a haze of 15% or less.

Accordingly, the surface-modified metal oxide nanoparticle dispersion composition may have high transparency.

According to an embodiment, the surface-modified metal oxide nanoparticle dispersion composition may be solvent-free.

That is, according to one embodiment, the surface-modified metal oxide nanoparticle dispersion composition may be a solvent-free type.

A method for preparing a surface-modified metal oxide nanoparticle dispersion composition according to another embodiment of the present invention includes the steps of: preparing surface-modified metal oxide nanoparticles; preparing a mixed solution by adding the surface-modified metal oxide nanoparticles to a solution in which a silane coupling agent is dissolved in an organic solvent; preparing a surface-modified metal oxide nanoparticle-organic solvent dispersion by adding beads to the mixed solution and dispersing the surface-modified metal oxide nanoparticles; and adding an acrylate-based monomer to the surface-modified metal oxide nanoparticles-organic solvent dispersion and removing the organic solvent.

According to one embodiment, in the method for preparing the surface-modified metal oxide nanoparticle dispersion composition, each characteristic of the surface-modified metal oxide nanoparticles, the acrylate-based monomer and the silane coupling agent is as described above.

Hereinafter, a method for preparing the surface-modified metal oxide nanoparticle dispersion composition will be described in detail for each step.

According to an embodiment, the preparing of the surface-modified metal oxide nanoparticles may include adding the metal oxide nanoparticles to an aqueous solution of a phosphoric acid-based compound to form a reactant; and washing and drying the formed reactant, and pulverizing the reactant.

In the step of adding the metal oxide nanoparticles to the aqueous solution of the phosphate-based compound, the metal oxide nanoparticles may be added to the aqueous solution of the phosphate-based compound while stirring.

According to an embodiment, the metal oxide particles surface-modified with the phosphoric acid-based compound may use commercially available particles, and at least one synthesis method selected from the group consisting of a hydrothermal synthesis method, a sol-gel method, a solid-phase method, and a supercritical method. can be synthesized using Preferably, the metal oxide particles surface-modified with the phosphoric acid-based compound may be synthesized by a hydrothermal synthesis method.

According to an embodiment, the surface-modified metal oxide particles with the phosphoric acid compound may have a molar ratio of a metal and a phosphoric acid group of the metal oxide of 1:0.04 to 1:0.12. Based on the metal molar content of the metal oxide, when the molar content of the metal and the phosphoric acid group of the metal oxide is included in less than 1: 0.04, the effect of improving yellowness may be insignificant, and when included in excess of 1: 0.12, the content of the phosphoric acid group As this increases, particle refractive index loss may occur.

According to one embodiment, in the step of forming the reactant, a basic aqueous solution is added dropwise to the aqueous solution of the phosphoric acid-based compound to which the metal oxide nanoparticles are added, and then at a reaction temperature of 70° C. to 100° C., for 2 hours to 4 hours. It may be to keep

According to one embodiment, the formed reactant may be washed using distilled water, acetone, or both. The cake of washed reactants can be dried and pulverized.

According to an embodiment, the step of preparing the mixed solution may be to prepare a mixed solution by adding the surface-modified metal oxide nanoparticles to a solution in which a silane coupling agent is dissolved in an organic solvent.

According to one embodiment, the solution obtained by dissolving the silane coupling agent in the organic solvent is mixed using a stirrer bar at a temperature of 20°C to 30°C for 5 minutes to 20 minutes after adding the silane coupling agent to the organic solvent. can be manufactured.

Then, the surface-modified metal oxide nanoparticles are put into a solution in which the silane coupling agent is dissolved in an organic solvent, and a mixture is prepared by mixing using a stirrer bar at a temperature of 20°C to 30°C for 20 minutes to 40 minutes. can do.

According to an embodiment, the organic solvent is tetrahydrofuran, isopropyl alcohol, n-butanol, ethylene glycol, propylene glycol, methyl ethyl ketone, diethyl ketone, methyl isobutyl ketone, CHN, ethyl acetate, butyl acetate, Propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, n-hexane, toluene, xylene, styrene, o-methyl styrene, m-methyl styrene, p-methyl styrene, vinyl toluene, p-methoxy styrene, benzyl acryl Late, benzyl methacrylate, phenyl acrylate, diphenyl acrylate, biphenyl acrylate, 2-biphenylyl acrylate, 2-([1,1'-biphenyl]-2-yloxy) ethyl acrylate , Phenoxybenzylacrylate, 3-phenoxybenzyl-3-(1-naphthyl)acrylate, ethyl (2E)-3-hydroxy-2-(3-phenoxybenzyl)acrylate, phenylmethacrylate , Biphenyl methacrylate, 2-nitrophenyl acrylate, 4-nitrophenyl acrylate, 2-nitrophenyl methacrylate, 4-nitrophenyl methacrylate, 2-nitrobenzyl methacrylate, 4-nitrobenzyl methacrylate acrylate, 2-chlorophenyl acrylate, 4-chlorophenyl acrylate, 2-chlorophenyl methacrylate, 4-chlorophenyl methacrylate, ortho-phenylphenol ethyl acrylate, bisphenol diacrylate, urethane (meth) Acrylate, 2-ethylhexyl (meth) acrylate, isobornyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy Butyl acrylate, methyl ethylene glycol mono (meth) acrylate, methyl triethylene diglycol (meth) acrylate, 1,4-butanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hydroxyl Cypivalate neopentyl glycol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, caprolactone-modified dicyclopentanyl di(meth)acrylate, ethylene oxide-modified phosphate di(meth)acrylate, arylated cyclo Hexyldi(meth)acrylate, ethylene glycol di(meth)acrylate, 1,6-hexadiol diacrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri( group consisting of meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, polyol poly (meth) acrylate, urethane (meth) acrylate and glycerin trimethacrylate It may be to include one or more selected from. Preferably, the organic solvent may be tetrahydrofuran.

According to one embodiment, the organic solvent is removed by vacuum pressure reduction in the final step, thereby obtaining a solvent-free surface-modified metal oxide nanoparticle dispersion composition.

According to one embodiment, the step of preparing the surface-modified metal oxide nanoparticles-organic solvent dispersion may be prepared by adding beads to the mixed solution and dispersing the surface-modified metal oxide nanoparticles.

According to an embodiment, the beads include at least one selected from the group consisting of zirconia, yttria, yttria stabilized zirconia, alumina, titanium dioxide, magnesia, silicon carbide, tungsten carbide, titanium carbide, and silicon nitride may be doing Preferably, the beads may be zirconia beads.

According to one embodiment, after the beads are added to the mixed solution, the surface-modified metal oxide nanoparticles may be dispersed for 2 to 4 hours using a paint shaker.

According to one embodiment, in the step of adding the acrylate-based monomer and removing the organic solvent, finally, by adding the acrylate-based monomer to the dispersion, and then removing the organic solvent, the solvent-free surface-modified metal oxide nanoparticle dispersion compositions can be prepared.

According to one embodiment, a 1 μm syringe filter is used to filter out undispersed large metal oxide particles in the metal oxide-organic solvent dispersion, and the organic solvent is removed under vacuum under reduced pressure in the final step, so that the solvent-free type It is possible to prepare a surface-modified metal oxide nanoparticle dispersion composition.

The film composition according to another embodiment of the present invention is a surface-modified metal oxide nanoparticle dispersion composition according to an embodiment of the present invention or a surface-modified metal oxide nano prepared by a manufacturing method according to another embodiment of the present invention. particle dispersion compositions; UV photoinitiators; and a monomer for UV curing.

According to an embodiment, the UV photoinitiator may include a photocationic initiator, a radical photoinitiator, or both.

According to one embodiment, the UV photoinitiator, an onium salt-based, diazonium salt-based, sulfonium salt-based compound and an imidazole-based photocationic initiator selected from; and thioxanthone-based, phosphorus-based, triazine-based, benzophenone-based, benzoin-based, oxime-based, propanone-based, amino ketone-based, ketone-based, benzoin ether acetophenone-based, anthraquinone-based and aromatic phosphine oxide-based compounds It may include one or more selected from the group consisting of a radical photoinitiator.

According to one embodiment, the UV photoinitiator may be 2 wt% to 5 wt% of the film composition. If the UV photoinitiator is less than 2% by weight of the film composition, curing of the film composition may not be sufficiently performed, so it may be difficult to secure appropriate hardness, and if it exceeds 5% by weight, cracks, peeling, etc. may occur after film formation due to curing shrinkage. .

According to one embodiment, the UV curing monomer may include an acrylate-based resin. The acrylate-based resin is a saturated hydrocarbon-based polymer having no intramolecular double bond, and has excellent resistance to oxidation in terms of its intrinsic properties, and thus has excellent weather resistance.

According to an embodiment, the UV curing monomer is glycidyl acrylate, glycidyl methacrylate, glycidyl methacrylate, glycidyl-alpha-ethyl acrylate, glycidyl-alpha-ene -Propyl acrylate, glycidyl-alpha-butyl acrylate, 3,4-epoxybutyl methacrylate, 3,4-epoxybutyl acrylate, 6,7-epoxypeptyl methacrylate, 6,7-epoxyheptyl Acrylate, 6,7-epoxyheptyl-alpha-ethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyethyl meta It may include one or more selected from the group consisting of acrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, and trimethylpropane triacrylate.

According to an embodiment, the film composition according to the present invention may further include an acrylic resin.

According to an embodiment, the acrylic resin is hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), ethylene Glycol diacrylate (EGDA), trimethylolpropane triacrylate (TMPTA), trimethylolpropaneethoxy triacrylate (TMPEOTA), glycerin propoxylated triacrylate (GPTA), pentaerythritol tetraacrylate (PETA) , benzyl methacrylate, phenyl acrylate, diphenyl acrylate, biphenyl acrylate, 2-biphenylyl acrylate, 2-([1,1'-biphenyl] -2-yloxy) ethyl acrylate, Phenoxybenzyl acrylate, 3-phenoxybenzyl-3- (1-naphthyl) acrylate, phenyl methacrylate, biphenyl methacrylate, 2-nitrophenyl acrylate, 4-nitrophenyl acrylate, 2- It may include one or more selected from the group consisting of nitrophenyl methacrylate, 4-nitrophenyl methacrylate, and dipentaerythritol hexaacrylate (DPHA).

The film composition according to an embodiment of the present invention may prepare a composition having high transparency and high refractive index, and may improve yellowing of the film color.

The optical film according to another embodiment of the present invention is prepared by UV curing the film composition according to an embodiment of the present invention, and has a yellowness value (Y.I) of less than 30.

The optical film for a display according to the present invention has a characteristic of reducing yellowness while implementing a high refractive index of 1.67 or more.

Hereinafter, the present invention will be described in detail with reference to the following Examples and Comparative Examples. However, the technical spirit of the present invention is not limited or limited thereto.

[Comparative example]

Hydroxylation-zirconia nanoparticles were synthesized using a hydrothermal synthesis method. 28.9 g of tetrahydrofuran (THF) and 2.1 g of methacryl group silane were added to the synthesized particles in a 100 mL container for a paint shaker, and mixed at room temperature using a stirrer bar for 10 minutes. Then, 38 g of the synthesized zirconia powder was added to the solution, and a mixed solution was formed for 30 minutes at room temperature using a stirrer bar. Then, 200 g of 0.05 mm beads were added to the mixed solution and dispersed for 3 hours using a paint shaker to obtain a 40 wt% zirconia-THF solvent dispersion. Thereafter, the zirconia-THF solvent dispersion and the monomer were mixed to remove the solvent under vacuum to prepare a zirconia-monomer dispersion.

[Example 1]

In Comparative Example, phosphate surface-modified zirconia-monomer dispersion composition was prepared in the same manner as in Comparative Example, except that phosphate surface-modified zirconia nanoparticles were synthesized by adding triethyl phosphate instead of synthesizing hydroxide-zirconia nanoparticles. did.

[Example 2]

In Example 1, a phosphate surface-modified zirconia-monomer dispersion composition was prepared in the same manner as in Example 1, except that 2.9 g of methacryl group silane was added.

[Example 3]

In Example 1, except that 3.3 g of methacryl group silane was added, a phosphate surface-modified zirconia-monomer dispersion composition was prepared in the same manner as in Example 1.

1 is a FT-IR analysis result of ZrO ₂ and phosphate surface-modified ZrO ₂ particles, FIG. 2 is ZrO ₂ , phosphate surface-modified ZrO ₂ particles, and XRD analysis results of tetragonal and monoclinic to be.

Referring to FIGS. 1 and 2 , functional groups on the zirconia surface of the phosphate surface-modified zirconia powder were confirmed through FT-IR analysis, and the zirconia crystal phase was confirmed through XRD analysis. When the surface was modified with phosphate, it was confirmed that the monoclinic and tetragonal mixed crystal phases were synthesized into tetragonal single crystal phases.

Table 1 below shows the results of measuring the refractive index, D ₅₀ diameter, Haze, yellowness (YI) and transmittance of the zirconia-monomer dispersion of Comparative Example and the phosphate surface-modified zirconia-monomer dispersion composition for Examples 1 to 3 .

division nanoparticles methacrylic group
Silane content
(g) refractive index D ₅₀
(nm) Haze
(%) Y.I. transmittance
(%) comparative example Hydroxide-zirconia 2.1 1.672 22.8 15.86 40.06 42.53 Example 1 Phosphate surface-modified zirconia 2.1 1.672 20.0 11.86 27.88 55.40 Example 2 Phosphate surface-modified zirconia 2.9 1.671 16.3 12.15 21.53 60.84 Example 3 Phosphate surface-modified zirconia 3.3 1.670 16.4 9.24 21.25 62.40

Referring to Table 1, the monomer dispersion prepared according to the refractive index of 1.670-1.675 of Examples 1 to 3 of the present invention was measured by measuring particle size, optical properties such as transmittance, haze, and yellow index, and phosphate surface-modified zirconia. It was confirmed that there were effects of increase in transmittance, decrease in haze and yellowness, and decrease in particle size of the monomer dispersion when applied.

As described above, although the embodiments have been described with reference to the limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (20)

Metal oxide particles surface-modified with a phosphoric acid-based compound;
acrylate-based monomers; and
silane coupling agents;
including,
The phosphoric acid-based compound is a phosphoric acid ester,
The phosphoric acid ester is triethyl phosphate, tris-(2-diethylamino-ethyl)phosphate, tris-(2-dimethylamino-ethyl)phosphate, tridimethylaminomethylphosphate, tridiethylaminomethylphosphate, bis-( 2-Dimethylamino-ethyl)methyl)-phosphonate, bis-(2-diethylamino-ethyl)methyl-phosphonate, di-diethylaminomethylmethyl-phosphonate, triethylaminophosphate, diethyl At least one selected from the group consisting of amino methylaminophosphate, dimethylamino ethylaminophosphate, diethylaminomethyl dimethylphosphate, 2-diethylamino-ethyldimethylphosphate and 2-dimethylamino-ethyldimethylphosphate,
The metal oxide particles surface-modified with the phosphoric acid compound have a tetragonal single crystal phase,
The yellowness (YI) is less than 30,
A surface-modified metal oxide nanoparticle dispersion composition.
delete According to claim 1,
The metal oxide particles,
ZrO ₂ , SiO ₂ , TiO ₂ , SrTiO ₂ , MgO, Ta ₂ O ₅ , ZrO ₂ -TiO ₂ and SiO ₂ -Fe ₂ O ₃ Which comprises at least one selected from the group consisting of,
A surface-modified metal oxide nanoparticle dispersion composition.
delete delete According to claim 1,
The metal oxide particles surface-modified with the phosphoric acid-based compound,
The molar ratio of the metal and the phosphoric acid group of the metal oxide is 1: 0.04 to 1: 0.12,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The metal oxide particles surface-modified with the phosphoric acid-based compound,
That the average particle diameter is 5 nm to 20 nm,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The surface-modified metal oxide particles with the phosphoric acid-based compound will be 20% to 60% by weight of the surface-modified metal oxide nanoparticle dispersion composition,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The acrylate-based monomer,
3-(phenoxyphenyl)methylpropyl-2-enoate (3-(phenoxyphenyl)methyl prop-2-enoate; PBA), methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acryl Late, isobutyl acrylate, t-butyl acrylate, pentyl acrylate, isopentyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, nonyl acrylate, isononyl acrylate, dodecyl acrylate, stearyl Acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, pentyl methacrylate, isopentyl methacrylate acrylate, 2-ethylhexyl methacrylate, isooctyl methacrylate, nonyl methacrylate, isononyl methacrylate, dodecyl methacrylate, stearyl methacrylate, 2-ethoxyethoxyethyl acrylate, 2-ethoxyethoxyethyl methacrylate, methoxyethyl acrylate, methoxyethyl methacrylate, 2-phenoxyethyl acrylate, ethoxylate phenoxy acrylate, 3,3,5-trimethylcyclohexaneacrylic rate, cyclic triethyl propane formal acrylate, benzyl acrylate, isobornyl acrylate, cyclohexyl acrylate and biphenyl methyl acrylate comprising at least one selected from the group consisting of,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The acrylate-based monomer, 40% to 60% by weight of the surface-modified metal oxide nanoparticle dispersion composition,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The silane coupling agent,
γ-methacryloxypropyltrimethoxysilane, 4-aminobutylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, N-2-aminoethyl-3-aminopropyldiethylisopropoxysilane, (mercapto methyl) dimethylethoxysilane, di-4-mercaptobutyldimethoxysilane, 3-mercaptopropyltriisopropoxysilane, 3-methacryloxypropyldimethylethoxysilane, 3-acryloxypropyltrimethoxysilane, (3-glycidoxypropyl)methyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropyltrimethoxysilane, 4-bromobutylmethyldibutoxysilane, 5 -Iodohexyldiethylmethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isothiocyanatepropylmethyldimethoxysilane, 3-hydroxybutylisopropyldimethoxysilane, bis(2-hydroxyethyl) -3-Aminopropyltriethoxysilane, bromophenyltrimethoxysilane, (2-(iodophenyl)ethyl)ethyldimethoxysilane, bis(chloromethylphenyl)dimethoxysilane, bromomethylphenyldimethylisopropoxysilane , bis(propyltrimethoxysilane)carbodiimide, N-ethyl-N-(propylethoxydimethoxysilane)-carbodiimide, 3-(trimethoxysilyl)propanol, (3,5-hexadione ) Triethoxysilane, 3-(trimethoxysilyl)propylacetoacetate, 3-(trimethoxysilyl)propylmethacrylate silane, 3-aminopropyltrimethoxysilane, 2-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, 3-ureidepropyltrimethoxysilane, N-ethoxy Carbonyl-3-aminopropyltrimethoxysilane, N-triethoxysilylpropyltriethylenetriamine, N-trimethoxysilylpropyltriethylenetriamine, 10-trimethoxysilyl-1,4,7-triamine Zodecane, 10-triethoxysilyl-1,4,7-triazodecane, 9-trimethoxysilyl-3,6-azononylacetate, 3-(triethoxysilyl)propylsuccinic anhydride, N-benzyl with -3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-bis-oxyethylene-3-aminopropyltrimethoxysilane and (methacryloxy)propyltrimethoxysilane comprising at least one selected from the group consisting of that is,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The silane coupling agent, based on 100 parts by weight of the surface-modified metal oxide nanoparticles, 5 parts by weight to 20 parts by weight,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The surface-modified metal oxide nanoparticle dispersion composition,
The liquidus refractive index is 1.67 or more,
A surface-modified metal oxide nanoparticle dispersion composition.
According to claim 1,
The surface-modified metal oxide nanoparticle dispersion composition,
transmittance of 55% or more,
Haze of 15% or less,
A surface-modified metal oxide nanoparticle dispersion composition.
Preparing surface-modified metal oxide nanoparticles;
preparing a mixed solution by adding the surface-modified metal oxide nanoparticles to a solution in which a silane coupling agent is dissolved in an organic solvent;
preparing a surface-modified metal oxide nanoparticle-organic solvent dispersion by adding beads to the mixed solution and dispersing the surface-modified metal oxide nanoparticles; and
adding an acrylate-based monomer to the surface-modified metal oxide nanoparticles-organic solvent dispersion and removing the organic solvent;
containing,
A method for preparing a surface-modified metal oxide nanoparticle dispersion composition.
16. The method of claim 15,
The step of preparing the surface-modified metal oxide nanoparticles,
forming a reactant by adding metal oxide nanoparticles to an aqueous solution of a phosphoric acid-based compound; and
washing, drying, and pulverizing the formed reactant;
containing,
A method for preparing a surface-modified metal oxide nanoparticle dispersion composition.
The surface-modified metal oxide nanoparticle dispersion composition of claim 1 or the surface-modified metal oxide nanoparticle dispersion composition prepared by the method of claim 15;
UV photoinitiators; and
UV curing monomers;
containing,
film composition.
18. The method of claim 17,
The UV photoinitiator is
a photocationic initiator selected from onium salt-based, diazonium salt-based, sulfonium salt-based compounds and imidazole-based compounds; and
Thioxanthone-based, phosphorus-based, triazine-based, benzophenone-based, benzoin-based, oxime-based, propanone-based, amino ketone-based, ketone-based, benzoin ether acetophenone-based, anthraquinone-based and aromatic phosphine oxide-based compounds A radical photoinitiator; which comprises at least one selected from the group consisting of
film composition.
18. The method of claim 17,
The UV curing monomer is
Glycidyl acrylate, glycidyl methacrylate, glycidyl methacrylate, glycidyl-alpha-ethyl acrylate, glycidyl-alpha-ene-propyl acrylate, glycidyl-alpha-butylacrylic rate, 3,4-epoxybutyl methacrylate, 3,4-epoxybutyl acrylate, 6,7-epoxypeptyl methacrylate, 6,7-epoxyheptyl acrylate, 6,7-epoxyheptyl-alpha-ethyl Acrylates, 2-hydroxypropyl acrylate, 2-hydroxyethyl acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyethyl methacrylate, tripropylene glycol diacrylate, dipropylene glycol which comprises at least one selected from the group consisting of diacrylate, 1,6-hexanediol diacrylate, and trimethylpropane triacrylate,
film composition.
It is prepared by UV curing the film composition of claim 17,
a yellowness value (YI) of less than 30;
optical film.

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