KR20220023442A - Metal oxide dispersion composition for foriming light scattering layer and light scattering layer prepared using the same and display item comprising the light scattering layer - Google Patents

Abstract

The present invention relates to a metal oxide dispersion composition for forming a light scattering layer, the light scattering layer manufactured by using the same, and a display product comprising the light scattering layer. The metal oxide dispersion composition for forming the light scattering layer according to an embodiment of the present invention comprises: a dispersing agent including a phosphoric acid-based compound; metal oxide particles; and organic solvents.

Description

Metal oxide dispersion composition for forming a light scattering layer, and a display article comprising a light scattering layer and a light scattering layer manufactured using the same }

The present invention relates to a metal oxide dispersion composition for forming a light scattering layer, a light scattering layer prepared using the same, and a display article including the light scattering layer.

A composition containing an oxide of metals is usefully used in manufacturing a film for a display or the like. One example of such a film for display is a brightness enhancing film.

The film for display is an electroluminescent panel, a laptop computer display, a word processor, a desktop monitor, a television, a video camera, and a liquid crystal monitor (LCD), an organic light emitting diode (OLED), etc. It is being used for the purpose of increasing the luminance of a backlight type flat panel display.

In order to reduce reflection loss caused by a difference in refractive index at the interface of the light emitting device when light is emitted and to increase the light output of the light emitting device, an antireflection film is formed on the surface or a transparent substrate or the surface is etched. A method for improving light output by scattering, such as forming irregularities, is being researched and developed.

In order to increase light extraction efficiency by scattering, research on manufacturing a low-reflection surface film by light scattering by forming irregularities or nanowires on the surface of a light emitting device, or research on corrugating the electrode structure, etc. proceeded However, such a surface asperity formation structure is expected to have a detrimental effect on the electric field of the device as a result in electrode configuration on the surface of the scattering layer, and there is a limit in the scope of application.

There have also been studies on introducing a scattering element into the substrate or into the organic binder, and diverting that light from the device by stopping the substrate mode. The light scattering layer is composed of two types of fillers with different refractive indices in the organic binder, and light scattering occurs due to the difference in refractive index between the three constituent materials. However, when inorganic particles having different refractive indices are introduced into the organic binder, there is a problem that the scattering effect will not be large because the difference in refractive index between the organic binder and the inorganic particles is not large, and thus the light extraction effect will be halved.

In addition, studies have been reported to maximize light extraction efficiency by forming a light scattering layer on a transparent substrate in the structure of an organic light emitting diode (OLED). In this study, a study to increase the light scattering efficiency by using a polyacrylic scattering film including pores has been reported. In the case of the resin used at this time, when used for a long time, a decrease in light efficiency is caused due to discoloration due to moisture, etc. In addition, since the resin used as an organic backfill has a low refractive index (n = 1.4 to 1.5), there is a problem that the scattering effect will not be improved any more.

Among the oxides of metals, zirconia particles have high refractive index, but have poor dispersion stability, and since zirconia itself has photocatalytic activity, there are problems such as light resistance and weather resistance. Using zirconia, it is difficult to obtain a colloidal zirconia sol having substantially no photocatalytic activity and excellent light resistance and weather resistance, but excellent dispersibility and stability.

It is necessary to develop a dispersion composition with excellent light scattering effect that can extract the light totally reflected between the transparent electrode and the transparent substrate to the outside as much as possible while containing the metal oxide, which can ensure high dispersibility of the metal oxide in the composition. .

It is an object of the present invention to meet the above needs, to provide a display article comprising a metal oxide dispersion composition for forming a light scattering layer having excellent light scattering effect and excellent dispersibility and stability, and a light scattering layer and a light scattering layer prepared using the same will be.

The metal oxide dispersion composition for forming a light scattering layer of the present invention comprises: a dispersing agent containing a phosphoric acid-based compound; metal oxide particles; and organic solvents.

According to an embodiment, the dispersant may have a weight average molecular weight of 1500 or more.

According to an embodiment, the dispersant may have an acid value of 90 mg KOH/g or more.

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 dispersant may be 5 wt% to 10 wt% of the metal oxide dispersion composition for forming a light scattering layer.

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

According to an embodiment, the metal oxide particles may be 30 wt% to 50 wt% of the metal oxide dispersion composition for forming a light scattering layer.

According to an embodiment, the metal oxide particles may have a 50% cumulative average particle diameter (D50) of the particles of 100 nm to 300 nm.

According to one embodiment, the organic solvent is 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 acrylate, benzyl meta acrylate, 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, ethyl (2E)-3-hydroxy-2-(3-phenoxybenzyl)acrylate, phenyl methacrylate, biphenyl methacrylate acrylate, 2-nitrophenyl acrylate, 4-nitrophenyl acrylate, 2-nitrophenyl methacrylate, 4-nitrophenyl methacrylate, 2-nitrobenzyl methacrylate, 4-nitrobenzyl methacrylate, 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-hydroxybutyl acrylate, Methylethylene glycol mono(meth)acrylate, methyltriethylenediglycol(meth)acrylate, 1,4-butanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, neopentyl hydroxypivalate Glycol di(meth)acrylate, dicyclofentanyl di(meth)acrylate, caprolactone-modified dicyclofentanyl di(meth)acrylate, ethylene oxide-modified di(meth)acrylate, arylated cyclohexyldi(meth) ) acrylate, ethylene glycol di(meth)acrylate, 1,6-hexadiol diacrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, di One or more selected from the group consisting of pentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, polyol poly (meth) acrylate, urethane (meth) acrylate and glycerin trimethacrylate may include.

According to an embodiment, the organic solvent may be 35 wt% to 45 wt% of the metal oxide dispersion composition for forming a light scattering layer.

According to an embodiment, the metal oxide dispersion composition for forming the light scattering layer may have a viscosity of 10 cP or less.

The light scattering layer according to another embodiment of the present invention is prepared using the metal oxide dispersion composition for forming a light scattering layer according to an embodiment of the present invention.

According to an embodiment, the light scattering layer may have a haze value of 95% or more.

According to an embodiment, the light scattering layer may have a total light transmittance (T.T) of 3% to 10%.

A display article according to another embodiment of the present invention includes a light scattering layer according to an embodiment of the present invention.

In the metal oxide dispersion composition for forming a light scattering layer according to an embodiment of the present invention, the phosphoric acid-based dispersant contained therein has a weight average molecular weight of 1500 or more, an acid value of 90 mg KOH/g or more, and a D50 diameter of the metal oxide particles When the value satisfies the range of 300 nm or less, it is possible to provide a dispersion composition in the colloidal region that has excellent dispersibility and stability, and can secure a haze value not exceeding 90% and transmittance characteristics of 10% or less.

A light scattering layer prepared using the metal oxide dispersion composition for forming a light scattering layer according to an embodiment of the present invention and an article for a display including the same can increase light extraction efficiency due to an excellent light scattering effect.

1 is a graph showing the molecular weight of the dispersant and the D50 diameter of the metal oxide particles contained in the metal oxide dispersion composition for forming a light scattering layer of Examples 1 to 3 of the present invention and the dispersion compositions 1 and 2 in Comparative Examples.

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.

The 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 this specification, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, 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 commonly used dictionaries 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 given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In describing 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 metal oxide dispersion composition for forming a light scattering layer of the present invention comprises: a dispersing agent containing a phosphoric acid-based compound; metal oxide particles; and organic solvents.

In the metal oxide dispersion composition for forming a light scattering layer according to an embodiment of the present invention, the phosphoric acid-based dispersant contained therein has a weight average molecular weight of 1500 or more, an acid value of 90 mg KOH/g or more, and a D50 diameter of the metal oxide particles When the value satisfies the range of 300 nm or less, it is possible to provide a dispersion composition in the colloidal region that has excellent dispersibility and stability, and can secure a haze value not exceeding 90% and transmittance characteristics of 10% or less.

According to an embodiment, the dispersant may have a weight average molecular weight of 1500 or more. Preferably, the weight average molecular weight of the dispersant may be 1800 or more, or 2000 or more, or 2500 or more. In the dispersion of metal oxide particles including the dispersant, the high molecular weight component of the dispersant is adsorbed to weaken the re-agglomeration force of the metal oxide particles.

According to an embodiment, the dispersant may have an acid value of 90 mg KOH/g or more. Preferably, the dispersant may have an acid value of 90 mg KOH/g to 130 mg KOH/g.

According to one embodiment, if the weight average molecular weight, acid value, and D 50 diameter range of the dispersant are satisfied, a haze value not exceeding 90%, a transmittance characteristic of 10% or less can be secured, and a dispersion having excellent dispersibility and stability compositions may be provided.

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 commercially available products of the dispersant 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. can be used

According to one embodiment, the dispersant may be 5 wt% to 10 wt% of the metal oxide dispersion composition for forming a light scattering layer. According to one embodiment, when the dispersant is less than 5% by weight of the metal oxide dispersion composition for forming a light scattering layer, a problem of cloudiness in the solution phase may occur because sufficient dispersibility cannot be ensured, and when it exceeds 10% by weight, the coating layer It may cause problems in curing and visibility.

According to an embodiment, the dispersing agent can control the D50 particle size by dispersing (eg, nano-dispersing) the metal oxide particles in an organic solvent so that the average particle diameter of the secondary particles is small. Therefore, with respect to the dispersion composition obtained using the metal oxide particle dispersion and the cured product thereof, while suppressing a decrease in refractive index due to the addition of a large amount of a dispersant, it is possible to increase the scattering property and ensure sufficiently high transparency.

According to an embodiment, the metal oxide particles are at least one selected from the group consisting of zirconia, silica, titania, SrTiO ₂ , MgO, Ta ₂ O ₅ , ZrO ₂ -TiO ₂ and SiO ₂ -Fe ₂ O ₃ . may include. 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 an embodiment, the metal oxide particles serve to provide high luminance functionality.

According to an embodiment, the metal oxide particles may be 30 wt% to 50 wt% of the metal oxide dispersion composition for forming a light scattering layer. When the metal oxide particles are included in less than 30% by weight of the metal oxide dispersion composition for forming the light scattering layer, the luminance of the curable composition is lowered and there may be a problem in that the optical properties of the cured film manufactured in the post-process are deteriorated, and 50% by weight If it is contained in excess, the dispersion interval between the metal oxide particles is extremely low, and the viscosity of the dispersion increases excessively, and there may be problems in that aggregation between the metal oxide particles occurs.

According to an embodiment, the metal oxide particles may have a 50% cumulative average particle diameter (D50) of the particles of 100 nm to 300 nm. D50 indicates the particle size, meaning that the number of particles below this particle size is 50% of the total number of particles.

According to one embodiment, when the average particle diameter (D50) of the 50% cumulative value of the metal oxide particles is less than 100 nm, the light scattering effect does not appear, and there may be a problem in that dispersion becomes difficult due to an increase in the surface energy of the particles, and exceeds 300 nm In the case of , the particle size is too large to form a precipitate, which may cause a problem of poor coating appearance and lowering of refractive index.

According to one embodiment, the organic solvent is 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 acrylate, benzyl meta acrylate, 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, ethyl (2E)-3-hydroxy-2-(3-phenoxybenzyl)acrylate, phenyl methacrylate, biphenyl methacrylate acrylate, 2-nitrophenyl acrylate, 4-nitrophenyl acrylate, 2-nitrophenyl methacrylate, 4-nitrophenyl methacrylate, 2-nitrobenzyl methacrylate, 4-nitrobenzyl methacrylate, 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-hydroxybutyl acrylate, Methylethylene glycol mono(meth)acrylate, methyltriethylenediglycol(meth)acrylate, 1,4-butanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, neopentyl hydroxypivalate Glycol di(meth)acrylate, dicyclofentanyl di(meth)acrylate, caprolactone-modified dicyclofentanyl di(meth)acrylate, ethylene oxide-modified di(meth)acrylate, arylated cyclohexyldi(meth) ) acrylate, ethylene glycol di(meth)acrylate, 1,6-hexadiol diacrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, di One or more selected from the group consisting of pentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, polyol poly (meth) acrylate, urethane (meth) acrylate and glycerin trimethacrylate may include.

According to an embodiment, the organic solvent may be 35 wt% to 45 wt% of the metal oxide dispersion composition for forming a light scattering layer. When the solvent is less than 35% by weight of the metal oxide dispersion composition for forming a light scattering layer, the viscosity increases and it is difficult to uniformly disperse the metal oxide. Because it has to be used, it becomes difficult to control the thickness of the coating film during coating.

According to an embodiment, the metal oxide dispersion composition for forming the light scattering layer may have a viscosity of 10 cP or less. When the viscosity exceeds 10 cP, the viscosity may become too high, which may cause a problem in that it is difficult to prepare a liquid with an organic material, and in the case of manufacturing a film for a display, there may be a problem in that it is difficult to form a homogeneous film layer.

The light scattering layer according to another embodiment of the present invention is prepared using the metal oxide dispersion composition for forming a light scattering layer according to an embodiment of the present invention.

According to an embodiment, the light scattering layer may have a haze value of 95% or more.

According to an embodiment, the light scattering layer may have a total light transmittance (T.T) of 3% to 10%.

According to an embodiment, the light scattering layer may have a light extraction efficiency of 100% or more.

A display article according to another embodiment of the present invention includes a light scattering layer according to an embodiment of the present invention.

The coating film for a display according to an embodiment of the present invention has excellent light scattering effect, and thus light extraction efficiency is improved.

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.

[Example 1]

A metal oxide dispersion composition for forming a light scattering layer was prepared using a phosphoric acid-based dispersant.

40 wt% of zirconia powder with an average particle diameter of 200 nm as metal oxide particles, 7.5 wt. % and 39.3 wt% of propylene glycol monomethyl ether acetate (PGMEA) as an organic solvent to form an inorganic particle mixture.

Thereafter, 0.05 mm beads of the same weight as the mixed solution were added and dispersed for 3 hours using a paint shaker to obtain a metal oxide dispersion composition for forming a light scattering layer.

[Example 2]

Instead of BYK-111 as a dispersing agent, BYK-180 (Alkylammonium of a copolymer with acidic groups, BYK Corporation), a phosphoric acid-based dispersant having a weight average molecular weight of 2500 and an acid value of 94 mg KOH/g, was used except that the same weight was used. obtained a metal oxide dispersion composition for forming a light scattering layer in the same manner as in Example 1.

[Example 3]

Example 1 except that, instead of BYK-111 as a dispersant, a phosphoric acid-based dispersant BYK-106 (Phosphoric acid salt, BYK) having a weight average molecular weight of 1800 and an acid value of 132 mg KOH/g was used in the same weight A metal oxide dispersion composition for forming a light scattering layer was obtained in the same manner as described above.

[Comparative Example 1]

Instead of BYK-111 as a dispersant, a phosphoric acid dispersant BYK-102 (Poly (oxy-1,2-ehanediyl), alpha-isotridecyl-omega-hydroxy-, A metal oxide dispersion composition for forming a light scattering layer was obtained in the same manner as in Example 1, except that phosphate, BYK Corporation) was used in the same weight.

[Comparative Example 2]

As a dispersant, instead of BYK-111, a phosphoric acid-based dispersant 208F (Polyoxyalkylene alkyl ether phosphoric acid ester and alcohols, DKS) having a weight average molecular weight of 1100 and an acid value of 165 to 195 mg KOH/g was used in the same weight. Then, a metal oxide dispersion composition for forming a light scattering layer was obtained in the same manner as in Example 1.

[Comparative Example 3]

Instead of BYK-111 as a dispersing agent, a fatty acid-based dispersant 220S (unsaturated polycarboxylic acid silicon polysiloxane copolymer, BYK Corporation) having a weight average molecular weight of 3000 and an acid value of 100 mg KOH/g was used in the same weight Example except that A metal oxide dispersion was obtained in the same manner as in 1.

[Comparative Example 4]

-hydroxy-,styrenated, phosphates. DKS 社)를 동일한 중량으로 사용하는 것을 제외하고는 실시예 1과 동일한 방법으로 금속 산화물 분산액을 획득하였다.Instead of BYK-111 as a dispersant, a phosphoric acid-based dispersant AL having a weight average molecular weight of 1100 and an acid value of 70-79 mg KOH/g (Poly(oxy-1,2-ethanediyl),α-phenyl-

-hydroxy-,styrenated, phosphates. A metal oxide dispersion was obtained in the same manner as in Example 1, except that DKS Corporation) was used in the same weight.

To confirm the light scattering function, Haze% and T.T (transmittance) were measured using NDH-7000 / Nippon Denshoku equipment.

The results of measuring the D50 diameter, molecular weight, acid value, Haze, TT and visual precipitation of the dispersant series, main components, and dispersed zirconia particles for Examples 1 to 3 and Comparative Examples 1 to 4 were as follows. .

division dispersant
(line) main ingredient D50
(nm) Molecular Weight acid
mg KOH/g Haze
(%) T.T. Visually
sedimentation Example 1 BYK-111
(Phosphate ester type) Alkenyl polyethylene glycol ether phosphate 196 2500 129 98.74 6.34 Good Example 2 BYK-180
(Phosphate ester type) Alkylammonium of a copolymer with acidic groups 194 2500 94 98.62 8.69 Good Example 3 BYK-106
(Phosphate ester type) Phosphoric acid salt 269 1800 132 97.45 4.95 Good Comparative Example 1 BYK-102 (phosphate ester type) Poly(oxy-1,2-ehanediyl), alpha-isotridecyl-omega-hydroxy-,phosphate 341 1400 102 97.52 33.92 NG Comparative Example 2 208F (phosphate ester) Polyoxyalkylene alkyl ether phosphoric acid esters and alcohols 815 1100 165~195 97.05 3.76 Good Comparative Example 3 BYK-220S
(fatty acid system) unsaturated polycarboxylic acid silicon polysiloxane copolymer 324.8 3000 100 65.15 58.79 NG Comparative Example 4 AL
(Phosphate ester type) Poly(oxy-1,2-ethanediyl),α-phenyl-ω-hydroxy-,styrenated, phosphates - 1100 70-79 64.84 57.87 NG

1 is a graph showing the molecular weight and D50 diameter of the dispersed metal oxide particles and the molecular weight of the dispersant contained in the metal oxide dispersion composition for forming a light scattering layer of Examples 1 to 3 of the present invention and the dispersion composition of Comparative Examples 1 to 4 of the present invention. .

As can be seen from the results in Table 1, in the case of Examples 1 to 3 of the present invention compared to the comparative example, by applying a phosphate-based dispersant having a molecular weight of 1800 or more and an acid value of 94 mg KOH/g or more, D50 300 nm It was possible to implement a zirconia dispersion having a particle size of less than 90%, and high haze% and high TT (transmittance) of over 90% were confirmed. It was confirmed that the light scattering function was imparted by the phosphoric acid-based dispersant as having high haze and transmittance.

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 (15)

a dispersing agent comprising a phosphoric acid-based compound;
metal oxide particles; and
organic solvents;
containing,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The dispersant has a weight average molecular weight of 1500 or more,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The dispersant, the acid value (acid value) of 90 mg KOH / g or more,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The phosphoric acid-based compound, 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 ester, polyether phosphate, cationic fatty acid group phosphate ester, polyoxyethylene lauryl ether phosphate ester And phosphate esters (phosphate esters) comprising at least one selected from the group consisting of,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The dispersing agent, 5% to 10% by weight of the metal oxide dispersion composition for forming the light scattering layer,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The metal oxide particles, zirconia, silica, titania, SrTiO ₂ , MgO, Ta ₂ O ₅ , ZrO ₂ -TiO ₂ and SiO ₂ -Fe ₂ O ₃ It comprises at least one selected from the group consisting of,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The metal oxide particles, 30% to 50% by weight of the metal oxide dispersion composition for forming the light scattering layer,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The metal oxide particles, the 50% cumulative value average particle diameter (D50) of the particles is 100 nm to 300 nm,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The organic solvent is 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-methylstyrene, m-methylstyrene, p-methylstyrene, vinyl toluene, p-methoxy styrene, benzyl acrylate, benzyl methacrylate, phenyl acrylate , diphenyl acrylate, biphenyl acrylate, 2-biphenylyl acrylate, 2-([1,1'-biphenyl] -2-yloxy) ethyl acrylate, phenoxybenzyl acrylate, 3-phenoxy Cybenzyl-3-(1-naphthyl)acrylate, ethyl (2E)-3-hydroxy-2-(3-phenoxybenzyl)acrylate, phenyl methacrylate, biphenyl methacrylate, 2-nitro Phenyl acrylate, 4-nitrophenyl acrylate, 2-nitrophenyl methacrylate, 4-nitrophenyl methacrylate, 2-nitrobenzyl methacrylate, 4-nitrobenzyl methacrylate, 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-hydroxybutyl acrylate, methyl ethylene glycol mono ( Meth)acrylate, methyltriethylenediglycol (meth)acrylate, 1,4-butanediol di(meth)acrylate, neopentylglycol di(meth)acrylate, hydroxypivalate neopentylglycol di(meth)acryl rate, dicyclofentanyl di(meth)acrylate, caprolactone-modified dicyclopentanyl di(meth)acrylate, ethylene oxide-modified di(meth)acrylate, arylated cyclohexyldi(meth)acrylate, ethylene glycol Di(meth)acrylate, 1,6-hexadiol diacrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth) Which comprises at least one selected from the group consisting of acrylate, dipentaerythritol hexa (meth) acrylate, polyol poly (meth) acrylate, urethane (meth) acrylate and glycerin trimethacrylate,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The organic solvent will be 35 wt% to 45 wt% of the metal oxide dispersion composition for forming a light scattering layer,
A metal oxide dispersion composition for forming a light scattering layer.
According to claim 1,
The metal oxide dispersion composition for forming the light scattering layer,
The viscosity is 10 cP or less,
A metal oxide dispersion composition for forming a light scattering layer.
The metal oxide dispersion composition for forming a light scattering layer according to any one of claims 1 to 11,
light scattering layer.
13. The method of claim 12,
The light scattering layer is
That the haze (Haze) value is 95% or more,
light scattering layer.
13. The method of claim 12,
The light scattering layer is
The total light transmittance (TT) of 3% to 10%,
light scattering layer.
Including the light scattering layer of claim 12,
display supplies.

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