KR20200109102A - Curable resin composition, scattering layer and image display device using the same - Google Patents

Abstract

The present invention relates to a curable resin composition, a scattering layer including a cured product thereof, and an image display device including the scattering layer, wherein the curable resin composition comprises scattering particles, a binder resin, a polymerizable compound, a thermosetting agent and a solvent, wherein the scattering particles include TiO_2 and SiO_2. The composition provides an excellent scattering effect and transmittance of light emitted from a light source.

Description

Curable resin composition, scattering layer and image display device manufactured using the same {CURABLE RESIN COMPOSITION, SCATTERING LAYER AND IMAGE DISPLAY DEVICE USING THE SAME}

The present invention relates to a curable resin composition, a scattering layer prepared using the same, and an image display device including the scattering layer.

Image display devices are generally mounted on electronic products such as televisions, monitors, notebook computers, smartphones, tablet computers, electronic pads, wearable devices, watch phones, portable information devices, and navigation or vehicle control display devices to display images. It is being used as a screen.

Specifically, such an image display device may include a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and among them, the liquid crystal display device is a thin film transistor substrate, a color filter substrate, and both substrates. It includes a liquid crystal display panel in which liquid crystal is injected. At this time, since the liquid crystal display panel is a non-light emitting device, a backlight unit for supplying light is positioned on the lower surface of the thin film transistor substrate, and the amount of light emitted from the backlight unit is adjusted according to the arrangement of the liquid crystals.

The backlight unit is divided into an edge type and a direct type according to the position of the light source. The edge type is a structure in which a light source is installed on the side of the light guide plate. In contrast, the direct type has a structure that has begun to be developed intensively as the size of the liquid crystal display device increases, and has a structure in which at least one light source is disposed on the lower surface of the liquid crystal display panel to supply light to the liquid crystal display panel entirely. Such a direct type backlight unit has an advantage of securing high luminance since a large number of light sources can be used compared to the edge type backlight unit.

Recently, a quantum dot bar in which a plurality of quantum dots that are converted into a red wavelength or a green wavelength is converted into a red wavelength or a green wavelength when receiving blue light is provided in front of a blue LED that emits blue light constituting a backlight unit, and is distributed to the quantum dot bar by irradiating blue light to the quantum dot bar. A technology for realizing high color reproduction is being developed by providing white light in which blue light, red light, and green light are mixed by a plurality of quantum dots.

However, even with the introduction of such quantum dots, it is difficult to overcome the difference in color reproducibility caused by the difference in transmittance between the place where the light source is located and the place where the light source is not located. In order to solve this problem, a technique of introducing a scattering layer has recently been developed as a method for uniformly transmitting light emitted from the light source to the entire quantum dot layer.

In this regard, Korean Laid-Open Patent Publication No. 10-2009-0102694 contains a urethane oligomer containing a primary amino group in a molecule and a thermosetting compound, thereby improving adhesion to the substrate, cutting resistance, low warpage, etc. Is being disclosed. In addition, Korean Patent Laid-Open No. 10-2012-0030050 discloses that a specific polyol component, a polyisocyanate, and a specific unsaturated hydroxy compound have a curable functional group as a reaction product, so that transparency is good, and adhesion and tear resistance to a transparent substrate are improved. Disclosed is a curable resin composition.

However, the above-described patents do not contain separate scattering particles, so it seems that they are not suitable for use as a scattering layer. Therefore, there is a need to develop a resin composition for manufacturing a scattering layer having excellent scattering effect, including scattering particles, and having excellent transmittance.

Republic of Korea Patent Publication No. 10-2009-0102694 Republic of Korea Patent Publication No. 10-2012-0030050

It is an object of the present invention to provide a curable resin composition suitable for producing a scattering layer by including scattering particles, which has excellent scattering effect and excellent transmittance.

In addition, it is an object of the present invention to provide a scattering layer prepared by using the curable resin composition.

It is another object of the present invention to provide an image display device including the scattering layer.

The present invention provides a curable resin composition comprising a scattering particle, a binder resin, a polymerizable compound, a thermosetting agent and a solvent, wherein the scattering particles include TiO ₂ and SiO ₂ .

In addition, the present invention provides a scattering layer comprising a cured product of the curable resin composition.

Further, the present invention provides an image display device including the scattering layer.

The curable resin composition according to the present invention includes TiO ₂ and SiO ₂ as scattering particles together, thereby providing an effect of having excellent scattering effect and transmittance of light emitted from a light source.

Therefore, the scattering layer including the cured product of the curable resin composition and the image display device including the scattering layer uniformly transmit light emitted from the light source to reduce the difference in color gamut between the light source and the non-located light source. Provides a possible effect.

1 is a diagram showing a criterion for evaluating the surface condition of a scattering layer in the present invention.

The present invention is a curable resin composition comprising a scattering particle, a binder resin, a polymerizable compound, a thermosetting agent, and a solvent, wherein the scattering particles include TiO ₂ and SiO _{2 A} curable resin composition comprising a cured product thereof, It relates to an image display device comprising a scattering layer and the scattering layer, wherein the curable resin composition according to the present invention provides excellent scattering effect and transmittance of light emitted from a light source, and includes a cured product of the curable resin composition. An image display device including a scattering layer and the scattering layer uniformly transmits light emitted from a light source, thereby providing an effect of reducing a difference in color gamut between a location where a light source is located and a location where the light source is not located.

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

<curable resin composition>

Scattering particles

The curable resin composition of the present invention has the advantage that the light scattering effect can be further improved by including TiO ₂ and SiO ₂ together as scattering particles.

The TiO ₂ and SiO ₂ may be included in a weight ratio of 0.1 to 50: 1, preferably in a weight ratio of 1 to 30: 1. When the scattering particles satisfy the weight ratio range of TiO ₂ and SiO ₂ , it is preferable because excellent light scattering effect and transmittance can be secured.

The scattering particles may have an average particle diameter of 10 to 1000 nm, preferably 10 to 800 nm, and more preferably 100 to 500 nm. When the average particle diameter of the scattering particles satisfies the above range, a sufficient scattering effect of the light emitted from the light source can be expected, preventing the scattering particles from sinking in the composition, and obtaining a scattering layer surface of uniform quality. Do.

In the present invention, the term "average particle diameter" may be a number average particle diameter, and may be obtained from an image observed by, for example, a field emission column electron microscope (FE-SEM) or a transmission electron microscope (TEM). Specifically, several samples are extracted from the observation image of FE-SEM or TEM, and the diameters of these samples are measured to obtain an arithmetic average.

The scattering particles may further include scattering particles generally used in the art in addition to the TiO ₂ and SiO ₂ . The generally used scattering particles may be used without particular limitation, but as an example, a metal oxide may be used, and the metal oxide is, for example, Li, Be, B, Na, Mg, Al, K, Ca, Sc, V , Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Mo, Cs, Ba, La, Hf, W, Tl, Pb, Ce, Pr, Nd, Pm, Sm, Eu , Gd, Tb, Dy, Ho, Er, Tm, Yb, Sb, Sn, Zr, Nb, Ce, Ta, In, and may be one or more oxides selected from the group consisting of a combination thereof. More specifically, Al ₂ O ₃ , ZnO, ZrO ₂ , BaTiO ₃ , Ta ₂ O ₅ , Ti ₃ O ₅ , ITO, IZO, ATO, ZnO-Al, Nb ₂ O ₃ , SnO, MgO, and combinations thereof One or more selected from the group consisting of may be included, and if necessary, those surface-treated with a compound having an unsaturated bond such as acrylate may be used, but the present invention is not limited thereto.

The scattering particles may be included in an amount of 0.1 to 30 parts by weight, and preferably 1 to 20 parts by weight, based on 100 parts by weight of the curable resin composition. When the content of the scattering particles satisfies the above range, an image display device having excellent light emission intensity within a range of -60° to +60° can be manufactured based on a front viewing angle of 0°, and the front viewing angle is Of course, there is an advantage of obtaining the desired luminous intensity from the left and right sides, and it is preferable because it can minimize the effect of blocking light by excessive scattering particles and improve the stability of the composition.

Binder resin

The binder resin has reactivity due to the action of heat or light, can act as a dispersion medium of solid content, and can perform the function of a binder resin, a resin commonly used in the art may be used without particular limitation.

More specifically, the binder resin may include an acrylic binder resin, a cardo binder resin, or a mixture thereof.

The acrylic binder resin may specifically be a copolymer of an unsaturated carboxyl group-containing monomer and another monomer copolymerizable therewith.

The unsaturated carboxyl group-containing monomer includes, for example, an unsaturated monocarboxylic acid, an unsaturated dicarboxylic acid, or an unsaturated polycarboxylic acid having one or more carboxyl groups in the molecule thereof. Examples of the unsaturated monocarboxylic acid include acrylic acid, methacrylic acid, crotonic acid, α-chloroacrylic acid, and cinnamic acid. Examples of the unsaturated dicarboxylic acid include maleic acid, fumaric acid, itaconic acid, citraconic acid, and mesaconic acid. The unsaturated polyhydric carboxylic acid may be an acid anhydride, for example, maleic anhydride, itaconic anhydride, citraconic anhydride, etc., and the polyhydric carboxylic acid is its mono(2-methacryloyloxyalkyl ) It may be an ester, for example, succinate mono (2-acryloyloxyethyl), succinate mono (2-methacryloyloxyethyl), phthalate mono (2-acryloyloxyethyl), phthalate mono (2- Methacryloyloxyethyl) and the like. The unsaturated polyhydric carboxylic acid may include mono(meth)acrylate of a dicarboxylic polymer at both ends, for example, ω-carboxypolycaprolactone monoacrylate, ω-carboxypolycaprolactone monomethacrylate And the like.

The above-described carboxyl group-containing monomers are not limited thereto, and these may be used alone or in combination of two or more.

Other monomers copolymerizable with the carboxyl group-containing monomer include, for example, styrene, α-methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, p-chlorostyrene, o-methoxystyrene, m-methoxy. Toxoxystyrene, p-methoxystyrene, o-vinylbenzylmethylether, m-vinylbenzylmethylether, p-vinylbenzylmethylether, o-vinylbenzyl glycidyl ether, m-vinylbenzylglycidyl ether, p- Aromatic vinyl compounds such as vinyl benzyl glycidyl ether and indene; Methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, i-propyl acrylate, i-propyl methacrylate, n-butyl acrylate, n-butyl methacrylate, i-butyl acrylate, i-butyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-hydroxy Ethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl methacrylate, 2-hydroxy Roxybutyl acrylate, 2-hydroxybutyl methacrylate, 3-hydroxybutyl acrylate, 3-hydroxybutyl methacrylate, 4-hydroxybutyl acrylate, 4-hydroxybutyl methacrylate, allylacrylic Rate, allyl methacrylate, benzyl acrylate, benzyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, phenyl acrylate, phenyl methacrylate, 2-methoxyethyl acrylate, 2-methoxyethyl meth Crylate, 2-phenoxyethyl acrylate, 2-phenoxyethyl methacrylate, methoxydiethylene glycol acrylate, methoxydiethylene glycol methacrylate, methoxytriethylene glycol acrylate, methoxytriethylene glycol methacrylate Rate, methoxypropylene glycol acrylate, methoxypropylene glycol methacrylate, methoxydipropylene glycol acrylate, methoxydipropylene glycol methacrylate, isobornyl acrylate, isobornyl methacrylate, dicyclopentadie Nyl acrylate, dicyclopentadiethyl methacrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3-phenoxypropyl methacrylate, glycerol monoacrylate, glycerol monomethacrylate Unsaturated carboxylic acid esters such as; 2-Aminoethyl acrylate, 2-aminoethyl methacrylate, 2-dimethylaminoethyl acrylate, 2-dimethylaminoethyl methacrylate, 2-aminopropyl acrylate, 2-aminopropyl methacrylate, 2-dimethyl Unsaturated carboxyl, such as aminopropyl acrylate, 2-dimethylaminopropyl methacrylate, 3-aminopropyl acrylate, 3-aminopropyl methacrylate, 3-dimethylaminopropyl acrylate, and 3-dimethylaminopropyl methacrylate Acid aminoalkyl esters; Unsaturated carboxylic acid glycidyl esters such as glycidyl acrylate and glycidyl methacrylate; Carboxylic acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate, and vinyl benzoate; Unsaturated ethers such as vinyl methyl ether, vinyl ethyl ether, and allyl glycidyl ether; Vinyl cyanide compounds such as acrylonitrile, methacrylonitrile, α-chloroacrylonitrile, and vinylidene cyanide; Unsaturated amides such as acrylamide, methacrylamide, α-chloroacrylamide, N-2-hydroxyethylacrylamide, and N-2-hydroxyethyl methacrylamide; Maleimide, N-phenylmaleimide. Unsaturated imides such as N-cyclohexylmaleimide; Aliphatic conjugated dienes such as 1,3-butadiene, isoprene, and chloroprene; And a monoacryloyl group or a monomethacryloyl group at the end of the polymer molecular chain of polystyrene, polymethyl acrylate, polymethyl methacrylate, poly-n-butyl acrylate, poly-n-butyl methacrylate, and polysiloxane. And macromonomers, but are not limited thereto, and these may be used alone or in combination of two or more.

According to an embodiment of the present invention, the binder resin may include a cardo-based binder resin, and the cardo-based binder resin may include a compound represented by Formula 1 below. In this way, when the binder resin contains the cardo-based binder resin, there is an advantage of suppressing outgassing from the binder resin itself, and the cardo-based binder resin includes a binder resin represented by the following formula (1). The cured product (coating film) formed from the composition can be made uniform, and developability can be improved.

[Formula 1]

(In Formula 1, X is a group represented by the following Formula 2, Y is each independently a residue of a dicarboxylic anhydride, Z is each independently a residue of a tetracarboxylic dianhydride, and l is 4 to It is an integer of 20.)

[Formula 2]

(In Chemical Formula 2, * means a hand bonded to a carbon atom or an oxygen atom.)

The dicarboxylic anhydride is, for example, maleic anhydride, homak anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl end methylenetetrahydrophthalic anhydride, chlorendic anhydride, methyl Tetrahydro phthalic anhydride, glutaric anhydride, and the like, and the residue of the dicarboxylic anhydride refers to excluding the carboxylic anhydride group (-CO-O-CO-) from the aforementioned dicarboxylic anhydride. Means a residue.

The tetracarboxylic dianhydride may include, for example, pyromellitic acid, benzophenone tetracarboxylic dianhydride, biphenyl tetracarboxylic dianhydride, biphenyl ether tetracarboxylic dianhydride, and the like, and the tetracarboxylic acid dianhydride. The residue of the acid dianhydride refers to a residue excluding two carboxylic anhydride groups from the tetracarboxylic dianhydride described above.

When the curable resin composition of the present invention further includes the cardo-based binder resin, the content of the cardo-based binder resin may be 30 to 100% by weight or less, preferably 30 to 90% by weight based on 100% by weight of the total solid content of the binder resin. %, more preferably 40 to 80% by weight. As described above, when the content of the cardo-based binder resin satisfies the above range, the pencil hardness of the scattering layer produced after curing may be further improved, so it is preferable.

The weight average molecular weight (Mw) of the binder resin may be 3,000 to 40,000, preferably 5,000 to 20,000, and the molecular weight distribution (Mw/Mn) may be 1.5 to 6.0, and preferably 1.8 to 4.0 days. I can. When the weight average molecular weight or molecular weight distribution of the binder resin is included within the above range, it is preferable because the hardness and the residual film rate can be improved.

In the present invention, "molecular weight distribution" means a value obtained by dividing the weight average molecular weight (Mw) measured by GPC (Gel Permeation Chromatogrphy) by the number average molecular weight (Mn).

The acid value of the binder resin may be 30 to 200 mgKOH/g, and preferably 20 to 200 mgKOH/g. When the acid value of the binder resin satisfies the above range, a sufficient development speed can be secured, adhesion to the substrate can be reduced, storage stability of the entire composition, and viscosity increase can be prevented.

In the present invention, "acid value" refers to a value related to solubility as a value measured as the amount (mg) of potassium hydroxide required to neutralize 1 g of an acrylic polymer.

The binder resin may be included in an amount of 2 to 20 parts by weight, preferably 5 to 10 parts by weight, based on 100 parts by weight of the total curable resin composition. The content range of the binder resin is a range selected in consideration of the solubility of the developer and pattern formation, etc., and when the binder resin satisfies the above content range, the surface of the scattering layer is uniform and the light source can be more effectively scattered. desirable.

Polymerizable compound

The polymerizable compound refers to a compound that can be polymerized by light or heat, and more specifically, a monofunctional monomer, a bifunctional monomer, or other polyfunctional monomer may be mentioned.

The monofunctional monomer is, for example, nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexylcarbitol acrylate, 2-hydroxyethyl acrylate, N-vinylpi Rolidone, and the like, but are not limited thereto.

The bifunctional monomer is, for example, 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylate , Bis(acryloyloxyethyl) ether of bisphenol A, 3-methylpentanediol di(meth)acrylate, and the like, but are not limited thereto.

The polyfunctional monomers are, for example, trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, pentaerythritol tri (Meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, pro Foxylated dipentaerythritol hexa (meth) acrylate, dipenta erythritol hexa (meth) acrylate, and the like, but are not limited thereto.

Each of the exemplified monomers may be used alone or in combination of two or more. In addition, commercially available monomers may be purchased and used. Examples of commercially available products include Miramer M600 manufactured by Miwon Corporation.

The polymerizable compound may be included in an amount of 1 to 15 parts by weight, preferably 2 to 15 parts by weight, more preferably 2 to 10 parts by weight, based on 100 parts by weight of the total curable resin composition. When the polymerizable compound satisfies the above content range, it is preferable because the strength or smoothness thereof may be improved when the cured product of the composition containing the same is formed.

Heat curing agent

When forming a cured product using the curable resin composition including the thermosetting agent, the cured product may be deeply cured or the mechanical strength of the cured product may be improved.

The thermosetting agent may be, for example, one or more selected from the group consisting of a monofunctional alicyclic epoxy resin, a novolak type epoxy resin, and a silane-modified epoxy resin.

The monofunctional alicyclic epoxy resin may be prepared by polymerizing a diene compound, and preferably may include a compound represented by the following Formula 3 or Formula 4.

[Formula 3]

(In Formula 3, m, n, and o are each independently an integer of 1 to 20.)

[Formula 4]

The novolak-type epoxy resin may include cresol novolac or a compound represented by the following Formula 5.

[Formula 5]

(In Formula 5, p is an integer of 1 to 20.)

The silane-modified epoxy resin may be a reaction product of a hydroxyl group-containing epoxy resin and an alkoxysilane.

The hydroxyl group-containing epoxy resin is, for example, a bisphenol type epoxy resin, a novolak type epoxy resin, a glycidyl ester type epoxy resin, a glycidyl amine type epoxy resin, a linear aliphatic epoxy resin and an alicyclic epoxy resin, and biphenyl. Type epoxy resins and the like, and among them, bisphenol type epoxy resins and novolak type epoxy resins can be preferably used.

The bisphenol-type epoxy resin can be obtained by reaction of bisphenols with haloepoxides such as epichlorohydrin or α-methylepicorolhydrin, and the bisphenols are, for example, phenol or 2,6- Reaction products of dihalophenol with formaldehyde, acetaldehyde, acetone, acetophenone, cyclohexanone, benzophenone, and other aldehydes or ketones, and oxidation products of dihydroxyphenylsulfide by peracid, etherification of hydroquinones Reaction products, etc. are mentioned. As the bisphenol-type epoxy resin, bisphenol A, bisphenol S, bisphenol F, or bisphenol-type epoxy resin obtained by using these hydrogenated substances may be preferably used as bisphenols.

The bisphenol-type epoxy resin may include a hydroxyl group capable of reacting with an alkoxysilane described later. The hydroxyl group is not included in all molecules constituting the bisphenol-type epoxy resin, and may include a hydroxyl group as the whole bisphenol-type epoxy resin. For example, the bisphenol A type epoxy resin may be represented by the following formula (6), but may include those in which q is 1 or more, or those in which q is 0.

[Formula 6]

(In Formula 6, q is an integer of 1 to 34.)

As the bisphenol type epoxy resin, for example, a phosphorus-modified bisphenol type epoxy resin may be used by reacting a phosphorus compound. The novolac-type epoxy resin can be obtained, for example, by reacting a haloepoxide with a phenol novolak resin or a cresol novolac resin. The glycidyl ester type epoxy resin can be obtained by, for example, reacting epichlorohydrin with other basic acids such as phthal. The glycidyl amine type epoxy resin can be obtained by, for example, reacting polyamines such as diaminodiphenylmethane and isocyanuric acid with epichlorohydrin. The linear aliphatic epoxy resin and alicyclic epoxy resin can be obtained, for example, by treating olefins with peracids such as peracetic acid. The biphenyl-type epoxy resin can be obtained, for example, by reacting biphenols with epichlorohydrin.

The range of the preferred epoxy equivalent of the hydroxyl group-containing epoxy resin may vary depending on the structure of the hydroxyl group-containing epoxy resin, and may be appropriately selected and used according to the application. Usually, when a hydroxyl-containing epoxy resin component having an excessively small amount of epoxy equivalent is used, the adhesion to the substrate may be lowered when used as a protective film, so the epoxy equivalent of the hydroxyl-containing epoxy resin is preferably 180 or more.

On the other hand, if an epoxy resin component containing an excessively large epoxy equivalent is used, gelation may occur during reaction with an alkoxysilane described later, so the epoxy equivalent of the epoxy resin component containing a hydroxyl group is preferably 5,000 or less, and 200 It is more preferable that it is 400.

As the alkoxysilane, those generally used in the sol-gel method may be used, and examples thereof include a compound represented by the following formula (7), or a partial condensation product thereof.

[Formula 7]

(R ₄ ) _r Si(OR ₅ ) _4-r

(In Formula 7, r is an integer of 0 or 1, R ₄ is an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an unsaturated aliphatic hydrocarbon group having 2 to 6 carbon atoms, and R ₅ is each independently It is a hydrogen atom or a C1-C6 alkyl group.)

In Chemical Formula 7, R ₄ may be more specifically, a vinyl group, a mercapto group, an epoxy group, a glycidoxy group, and the like.

In the present invention, the term "partial condensation product" means obtained by condensing a part of an alkoxy group in the alkoxysilane compound represented by Formula 7. Such partial condensates can be obtained by hydrolyzing the alkoxysilane in the presence of an acid or alkali and water.

The alkoxy silane may include, for example, tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, and tetrabutoxysilane; Methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxy Silane, isopropyltrimethoxysilane, isopropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxy Trialkoxysilanes such as cyclohexylethyltriethoxysilane; Or a partial condensation product of these may be mentioned. Among these, a partial condensation product of tetramethoxysilane or alkyltrimethoxysilane represented by the following general formula (8) may be preferable.

[Formula 8]

(In Formula 8, R ₆ is each independently a methoxy group or an alkyl group having 1 to 6 carbon atoms, and b is an integer of 1 to 7.)

The weight average molecular weight (Mw) of the partial condensation of tetramethoxysilane or alkyltrimethoxysilane represented by Formula 8 is preferably about 260 to 2,000, and more preferably about 260 to 890. In the reaction of the tetramethoxysilane or the partial condensation of alkyltrimethoxysilane with the hydroxyl group-containing epoxy resin component, the unreacted alkoxysilane component is evaporated together with methanol and does not flow out of the system. It is also preferable. It may also be desirable in that such partial condensates are not toxic as found in the corresponding monomers.

In Formula 8, the average number of repeating units (b) may be 7 or less. When this value exceeds 7, solubility deteriorates, and since it is liable to be insoluble in a hydroxyl group-containing epoxy resin or an organic solvent, reactivity with a hydroxyl group-containing epoxy resin may decrease.

The silane-modified epoxy resin may be obtained by a dealcohol condensation reaction between the hydroxyl group-containing epoxy resin and an alkoxysilane. The ratio of the hydroxyl group-containing epoxy resin and the alkoxysilane to be used is not particularly limited as long as it is the same ratio as that the alkoxyl group substantially remains in the resulting silane-modified epoxy resin, but the mass (mass ratio) of the alkoxysilane in terms of silica / the hydroxyl group-containing epoxy resin It may be desirable to range from 0.01 to 3.

However, in the case where the hydroxyl group-containing epoxy resin is a high molecular weight resin having an epoxy equivalent of about 400 or more, the solution may become highly viscous or gelled by the progress of the dealcoholization reaction. Therefore, adjusting the equivalent ratio of the equivalent of the hydroxyl group of the epoxy resin containing the hydroxyl group and the equivalent of the alkoxy group of the alkoxysilane to be less than 1 or more than 1 so that either the equivalent of the hydroxyl group of the epoxy resin containing the hydroxyl group or the equivalent of the alkoxy group of the alkoxysilane increases. desirable. In particular, the equivalent ratio is more preferably adjusted to less than 0.8 or more than 1.2, and most preferably more than 1.2.

Further, high viscosity or gelation can be prevented by a method such as stopping the dealcoholization reaction during the reaction. For example, a method of adjusting the amount of methanol distilled off in the reaction system by using the reaction system as a reflux system at the point when the viscosity becomes high, or cooling the reaction system to terminate the reaction may be employed.

The production of the silane-modified epoxy resin is carried out, for example, by adding each component and performing a dealcohol condensation reaction while distilling off the alcohol generated by heating. The reaction temperature is preferably 50 to 130°C, more preferably 70 to 110°C, and the total reaction time is preferably 1 to 15 hours. This reaction is preferably carried out under substantially anhydrous conditions in order to prevent the polycondensation reaction of the alkoxysilane itself. In addition, this reaction can also be carried out under reduced pressure within a range in which the hydroxyl group-containing epoxy resin is not evaporated in order to shorten the reaction time.

Further, in the dealcohol condensation reaction, among conventionally known catalysts for accelerating the reaction, those that do not open the oxysilane ring may be used. As the catalyst, for example, lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, barium, strontium, zinc, aluminum, titanium, cobalt, germanium, tin, lead, antimony, arsenic, cerium, cadmium, manganese and The same metal; Oxides, organic acid salts, halides and alkoxides of these metals may be mentioned. Among these, in particular, organotin and tin organic acid are preferred, and specifically, dibutyltin dilaurate, tin octylate, and the like are effective.

In addition, the reaction can also be carried out in a solvent. The solvent is not particularly limited as long as it is an organic solvent that dissolves a hydroxyl group-containing epoxy resin and an alkoxysilane and does not react with them. Examples of such organic solvents include aprotic polar solvents such as dimethylformamide, dimethylacetamide, tetrahydrofuran, and methylethylketone.

Commercial products preferably used as silane-modified epoxy resins include Arakawa Chemical Industries Co., Ltd. product names: Composeran E-101, E-102, E-201, E-202, E-211, E-212, etc. have.

When the thermosetting agent includes a silane-modified epoxy resin, the silane-modified epoxy resin may be included in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the total solid content of the curable resin composition. If the above range is satisfied, it is preferable because it can exhibit good chemical resistance, heat resistance, and development speed.

The heat curing agent is used for heat treatment of the pixel coating film after development during the scattering layer manufacturing process (usually 180 to 250°C or less, preferably at 200 to 230°C for 5 to 40 minutes, preferably 10 to 35 minutes), and the carboxyl group in the binder resin By reacting with and promoting crosslinking of the binder resin, the hardness of the coating film is improved, thereby further improving the performance of the scattering layer.

The thermosetting agent may be included in an amount of 0.1 to 20 parts by weight, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the total curable resin composition. When the thermosetting agent is included within the above range, there is an advantage in that the chemical resistance is good, and the heat resistance and development speed can be good.

solvent

The solvent may be an organic solvent used in the art without particular limitation.

For example, ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; Diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; Ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; Alkylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate and methoxypentyl acetate; Aromatic hydrocarbons such as benzene, toluene, xylene, and mesitylene; Ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone; Alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin; Esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; cyclic esters such as γ-butyrolactone may be mentioned, but are not limited thereto, and these may be used alone or in combination of two or more.

Among the exemplified solvents, an organic solvent having a boiling point of 100° C. to 200° C. may be preferably used in terms of coating properties and drying properties. For example, alkylene glycol alkyl ether acetates, ketones, esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate, and the like, more preferably propylene glycol monomethyl ether acetate, propylene Glycol monoethyl ether acetate, cyclohexanone, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, and the like.

The solvent may be included in an amount of 60 to 90 parts by weight, preferably 70 to 85 parts by weight, based on 100 parts by weight of the total curable resin composition. When the content of the solvent is within the above-described range, the coating property will be good when applied with a coating device such as a roll coater, a spin coater, a slit and spin coater, a slit coater (sometimes referred to as a die coater), or inkjet. I can.

additive

The curable resin composition of the present invention may further include an additive.

The type of the additive may be determined according to the needs of the user and is not particularly limited in the present invention, but examples thereof include fillers, other polymer compounds, dispersants, adhesion promoters, antioxidants and anti-aggregation agents.

The filler may be, for example, glass, silica, or alumina.

Specific examples of the other high molecular compound include curable resins such as epoxy resins and maleimide resins, thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane. I can.

The dispersant may be further included in order to more effectively disperse the scattering particles included together, and for example, a commercially available surfactant may be used. Specifically, surfactants such as silicone-based, fluorine-based, ester-based, cationic, anionic, nonionic and amphoteric are mentioned. Each of these may be used alone or in combination of two or more. As the above surfactant, for example, polyoxyethylene alkyl ethers, polyoxyethylene alkyl peethers, polyethylene glycol diesters, sorbitan fatty esters, fatty acid modified polyesters, tertiary amine-modified polyurethanes , Polyethyleneimines, etc. In addition, KP (manufactured by Shin-Etsu Chemical Co., Ltd.), POLYFLOW (manufactured by Kyoeisha Chemical Co., Ltd.), EFTOP (manufactured by Tochem Products), Megafac (manufactured by Dai Nippon Ink Kagaku Kogyo Co., Ltd.), Flourad (manufactured by Sumitomo 3M), Asahi guard, Surflon (manufactured by Asahi Glass), Sol SOLSPERSE (manufactured by Geneva Corporation), EFKA (manufactured by EFKA Chemicals Corporation), PB 821 (manufactured by Ajinomoto Corporation), and the like.

As the adhesion promoter, for example, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminoprotriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2 -(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyl Trimethoxysilane, etc. are mentioned.

Specific examples of the anti-aggregation agent include sodium polyacrylate.

In the case of additives whose content is not exemplified among the additives, those skilled in the art may appropriately add and use them within a range that does not impair the effect of the present invention. For example, the additive may be used in an amount of 0.05 to 10 parts by weight, preferably 0.1 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the curable resin composition, but is not limited thereto.

The curable resin composition of the present invention may contain an antioxidant as an additive. When the antioxidant is further included, there is an advantage of preventing aging due to heat during post-baking during a process for forming a cured product and preserving color.

The antioxidant may include, for example, one or more selected from the group consisting of phenolic antioxidants, phosphorus antioxidants, and sulfur antioxidants, and in this case, a color change phenomenon that may occur at high temperatures during the process or a light source after display production It can suppress the occurrence of yellowing that can be caused by.

The kind of the phenolic antioxidant is not particularly limited, but a specific example is 3,9-bis[2-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]- 1,1-dimethylethoxy]-2,4,8,10-tetraoxaspiro[5.5]undecane, pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hyd) Oxyphenyl)propionate], 1,3,5,-trimethyl-2,4,6,-tris(3'5'-di-t-butyl-4-hydroxybenzyl)benzene, triethylene glycol-bis [3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate], 4,4'-thiobis(6-t-butyl-3-methylphenol), tris-(3, 5-di-t-butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-isocyanu Rate, 1,6-hexanediol-bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2-thio-diethylenebis[3-(3, 5-di-t-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylenebis(3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), 1, 3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, 2,4-bis[(octylthio)methyl]-O-cresol,1 ,6-hexanediol-bis-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], octadecyl 3-(3,5-di-tert-butyl-4- Hydroxyphenol) propionate, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 4,4'-butylidene-bis(3-methyl-6-t-butylphenol) , 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane, 1,3,5-tris(4-hydroxybenzyl)benzene and tetrakis[methylene-3- (3,5'-di-t-butyl-4'-hydroxyphenylpropionate)]methane, etc. are mentioned.

Among the above phenolic antioxidants, 3,9-bis[2-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1- in terms of heat resistance and heat discoloration prevention Dimethylethoxy]-2,4,8,10-tetraoxaspiro[5.5]undecane, 1,3,5,-trimethyl-2,4,6,-tris(3'5'-di-t- Butyl-4-hydroxybenzyl)benzene, pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], triethylene glycol-bis[3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate], 4,4'-thiobis(6-t-butyl-3-methylphenol), tris-(3,5-di -t-butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-isocyanurate, 1 ,6-hexanediol-bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2-thio-diethylenebis[3-(3,5-di -t-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylenebis(3,5-di-t-butyl-4-hydroxy-hydrocinnamamide), 1,3,5 -Trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene and 2,4-bis[(octylthio)methyl]-O-cresol are preferred.

Commercially available products include Irganox 1010 (manufactured by BASF), Sumilizer BBM-S (manufactured by Sumitomo Chemical), ADK STAB AO-80 (manufactured by ADEKA), Sumilizer GP (manufactured by Sumitomo Chemical), Irganox 1035 (manufactured by BASF), and the like.

The kind of the phosphorus antioxidant is not particularly limited, but a specific example is 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa -3,9-diphosphaspiro[5.5]undecane, diisodecylpentaerythritol diphosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, 2,2'-methylenebis( 4,6-di-t-butyl-1-phenyloxy)(2-ethylhexyloxy)phosphorus, 6-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy] -2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphine, triphenylphosphite, diphenylisodecylphosphite, phenyldiisodecylphosphite Pite, 4,4′-butylidene-bis(3-methyl-6-t-butylphenylditridecyl)phosphite, octadecylphosphite, tris(nonylphenyl)phosphite, 9,10-dihydro- 9-oxa-10-phosphaphenanthrene-10-oxide, 10-(3,5-di-t-butyl-4-hydroxybenzyl)-9,10-dihydro-9-oxa-10-phosphafe Nanthrene-10-oxide, 10-decyloxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, tris(2,4-di-t-butylphenyl)phosphite , Cyclic neopentanetetraylbis(2,4-di-t-butylphenyl)phosphite, Cyclic neopentanetetraylbis(2,6-di-t-butylphenyl)phosphite, 2,2-methylene Bis(4,6-di-t-butylphenyl)octylphosphite, tris(2,4-di-t-butylphenyl)phosphite, tetrakis(2,4-di-t-butylphenyl)[1, 1-biphenyl]-4,4'diylbisphosphonate, bis[2,4-bis(1,1-dimethylethyl)-6-methylphenyl]ethyl ester, phosphonic acid, and the like.

In terms of heat resistance and heat discoloration prevention among the phosphorus antioxidants, 2,2'-methylenebis(4,6-di-t-butyl-1-phenyloxy)(2-ethylhexyloxy)phosphorus, 3,9 -Bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane and 6-[3-( 3-t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine And the like are preferred.

The kind of the sulfur-based antioxidant is not particularly limited, but a specific example is 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl-bis[3 -(Dodecylthio)propionate], 2-mercaptobenzimidazole, dilauryl-3,3'-thiodipropionate, dimyristyl-3,3'-thiodipropionate, distea Reel-3,3'-thiodipropionate, pentaerythrityl-tetrakis (3-laurylthiopropionate), 2-mercaptobenzimidazole, etc. are mentioned.

In terms of heat resistance and heat discoloration prevention among the sulfur-based antioxidants, 2,2-bis({[3(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl-bis[3-(dodecylthio ) Propionate], 2-mercaptobenzimidazole, and the like are preferable.

The antioxidant may be included in an amount of 0.1 to 30 parts by weight, preferably 0.5 to 20 parts by weight, based on 100 parts by weight of the total solid content of the curable resin composition. When the content of the antioxidant satisfies the above range, it is advantageous in terms of solving the problem of lowering the emission intensity.

The method for preparing the curable resin composition of the present invention may be prepared by a conventional method known in the art, and is not particularly limited in the present invention, but may be prepared by, for example, the following method.

The scattering particles are mixed with a solvent in advance and dispersed using a bead mill or the like until the average particle diameter is 30 to 300 nm. At this time, if necessary, a dispersant may be additionally used, and some or all of the binder resin may be blended. To the obtained dispersion (hereinafter, sometimes referred to as mill base), the remainder of the binder resin, a thermosetting agent, a polymerizable compound, other components used as necessary, and additional solvents as necessary are further added to a predetermined concentration. A desired curable resin composition can be obtained.

<scattering layer>

In addition, the present invention provides a scattering layer comprising a cured product of the curable resin composition according to the present invention.

The scattering layer according to the present invention uniformly transmits light emitted from a light source, thereby providing an effect of reducing a difference in color reproducibility between a location where a light source is located and a location where the light source is not located.

Specifically, in order to reproduce high color and increase the size, a direct type structure is used in which one or more light sources are placed on the lower surface of the LCD panel to supply light to the entire panel inside the image display device. In this case, the light source is used under the display panel. In a structure in which one or more light sources are disposed at specific intervals, not a structure that is entirely disposed in the light source, a difference in transmittance occurs between the place where the light source is located and the place where the light source is not located. Therefore, the present invention has the advantage of uniformly adjusting the transmittance of the entire panel to a certain level by scattering the light emitted from the light source by including the scattering layer proposed in the present invention between the panel in the image display device and the light source. . In particular, in the case of a scattering layer including a cured product of the curable resin composition of the present invention, the scattering effect is excellent, and thus there is an advantage in that it is easier to control transmittance.

The method of forming the scattering layer of the present invention is not specifically limited to a method known in the art, and may be generally manufactured through a method of forming a coating film through thermal curing. Additional processes may be introduced.

<Image display device>

Further, the present invention provides an image display device including the scattering layer according to the present invention.

The image display device is, for example, the image display device is specifically, a liquid crystal display (liquid crystal display; LCD), an organic EL display (organic EL display), a quantum dot display, a liquid crystal projector, a display device for a game machine, a portable A display device such as a display device for a portable terminal such as a telephone, a display device for a digital camera, a display device for car navigation, etc. may be exemplified, and the image display device according to an embodiment of the present invention may be a quantum dot display.

The image display device may include a light-emitting device such as a light source, a light guide plate, a liquid crystal display including a color filter, and the like, and other components that can be included in the image display device, and the present invention is not limited thereto.

The image display device according to the present invention can reduce the difference in color reproducibility between the place where the light source is located and the place where the light source is not located by uniformly transmitting light emitted from the light source by including the scattering layer according to the present invention. Overall, there is an advantage that high color reproduction is possible.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples. In the following Examples and Comparative Examples, "%" and "parts" indicating the content are based on weight unless otherwise specified.

<Example>

Synthesis Example 1: Synthesis of binder resin

In a 4-neck flask, 235 g of bisphenol fluorene-type epoxy monomer represented by the following formula (9) (epoxy equivalent 235), 110 mg of tetramethylammonium chloride, 100 mg of 2,6-di-tertbutyl-4-methylphenol, and 72.0 g of acrylic acid Was dissolved by heating from 90° C. to 100° C. while blowing air at a rate of 25 ml/min.

[Formula 9]

Next, the solution was slowly heated up to 120° C. in a cloudy state to completely dissolve. At this time, stirring was continued while confirming that the solution gradually became transparent. Heating and stirring was continued for about 12 hours until the acid value became less than 1.0 mgK0H/g. Then, it cooled to room temperature, and the colorless, transparent and solid bisphenol fluorene type epoxy acrylate represented by the following formula (10) was obtained.

[Formula 10]

Thereafter, to 307.0 g of the bisphenol fluorene-type epoxy acrylate thus obtained, 600 g of propylene glycol monoethyl ether acetate (PGMEA) was added and dissolved, and then 80.5 g of benzophenone tetracarboxylic dianhydride and 1 g of tetraethyl ammonium bromide were added. It mixed and reacted at 110 degreeC to 115 degreeC for 6 hours. After confirming the disappearance of the acid anhydride group, 38.0 g of 1,2,3,6-tetrahydrophthalic anhydride was mixed, and reacted at 90° C. for 6 hours to obtain a cardo-based binder resin. At this time, the disappearance of the acid anhydride group was confirmed by the IR spectrum, and it was confirmed that the prepared Cardo-based binder resin had a weight average molecular weight of 5,300 g/mol and an acid value of 123 mgKOH/g.

Examples 1 to 7 and Comparative Examples 1 to 3: Preparation of curable resin composition

A curable resin composition was prepared with each composition and content shown in Table 1 below.

(Unit: parts by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 Scattering particles A1 3.53 3.38 3.06 2.69 2.50 0.97 0.51 3.75 3.53 3.53 A2 0.23 0.38 0.69 1.06 1.25 0.56 0.31 - - - A3 - - - - - - - - 0.23 - A4 - - - - - - - - - 0.23 Binder resin B 8.40 8.41 8.40 8.40 8.40 9.55 9.86 8.41 8.40 8.40 Polymerizable compound C 6.41 6.39 6.41 6.41 6.42 7.19 7.59 6.38 6.41 6.41 Heat curing agent D 5.88 5.87 5.88 5.88 5.88 6.18 6.18 5.86 5.88 5.88 additive E1 0.12 0.14 0.13 0.13 0.12 0.12 0.12 0.17 0.12 0.12 E2 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 0.43 solvent F 75.00 75.00 75.00 75.00 75.00 75.00 75.00 75.00 75.00 75.00

A1: TiO ₂ (TR-88, manufactured by Huntsman)

A2: SiO ₂ (E+ 508, manufactured by ABC Nanotech)

A3: ZnO (SG-ZNO30, manufactured by Seokkyung AT)

A4: ZrO ₂ (SG-ZRO30SPM, manufactured by Seokkyung AT)

B: Binder resin of Synthesis Example 1

C: Dipentaerythritol hexaacrylate (DPHA, Kayarad DPHA, manufactured by Nippon Kayaku Co., Ltd.)

D: Epoxy resin (Sumi Epoxy ESCN 195XL, manufactured by Sumitomo Chemical Industry Co., Ltd.)

E1: Dispersant (DISPERBYK-110, manufactured by BYK)

E2: Antioxidant (Sumilizer GP, manufactured by Sumitomo Chemical)

F: Propylene glycol monomethyl ether acetate (PGMEA)

Preparation Example: Preparation of scattering layer

A 5cmX5cm glass substrate (Corning) was washed with neutral detergent and water, and then dried. Each of the curable resin compositions prepared in Examples and Comparative Examples was spin-coated on the glass substrate so that the final film thickness became 2.0 μm, and the solvent was removed by pre-baking and drying at 80 to 120° C. for 1 to 2 minutes. . Then, after 10 to 30 minutes at 150 to 250 ℃ firing to prepare a scattering layer.

<Experimental Example>

Experimental Example 1: Evaluation of luminance

After placing the scattering layer prepared above on a blue light source (XLamp XR-E LED, Royal blue 450, Cree Company), using a luminance meter (CAS140CT Spectrometer, Instrument Systems Company), at viewing angles 0° and 60° The luminance was measured. Based on the luminance of the scattering layer prepared using the curable resin composition of Example 1 (100%), the luminance of each scattering layer prepared using the curable resin composition of the other Examples and Comparative Examples was compared, and the result It is shown in Table 2 below.

Experimental Example 2: Surface condition evaluation

The surface condition of the scattering layer prepared above was observed through an OM equipment (ECLIPSE LV100POL Nikon). 1 is a diagram showing a criterion for evaluating a surface condition of a scattering layer. Based on FIG. 1, the surface conditions of each scattering layer were determined as O and X, and the results are shown in Table 2 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 0° luminance
(%) 100.0% 105.8% 111.9% 115.7% 120.2% 144.2% 153.2% 84.8% 96.5% 92.7% 60°
Luminance (%) 100.0% 94.7% 92.7% 86.7% 83.3% 78.0% 73.3% 130.7% 123.4% 98.7% Surface condition O O O O O O O O X X

Referring to Table 2, in the case of Examples 1 to 7 of the present application including TiO ₂ and SiO ₂ as scattering particles, it can be seen that excellent effects are exhibited in both luminance and surface condition evaluation.

On the other hand, in the case of Comparative Example 1 containing only TiO ₂ as scattering particles, it can be seen that the luminance at a viewing angle of 0° was significantly reduced to 84.8% compared to Example 1, and TiO ₂ and SiO ₂ as the scattering particles were not combined. _In the case of Comparative Examples 2 and 3 using ₂ and ZnO combinations or TiO ₂ and ZrO ₂ combinations, respectively, it can be seen that the surface condition of the scattering layer is poor.

As such, it can be seen that the scattering layer prepared using a curable resin composition containing TiO ₂ and SiO ₂ as scattering particles improves the scattering effect and transmittance of light emitted from the light source, and thus exhibits excellent luminance. .

Claims (13)

As a curable resin composition containing scattering particles, a binder resin, a polymerizable compound, a thermosetting agent and a solvent,
The scattering particles are the curable resin composition containing TiO ₂ and SiO ₂ . The method according to claim 1,
The TiO ₂ and SiO ₂ Curable resin composition, characterized in that contained in a weight ratio of 0.1 to 50: 1. The method according to claim 1,
The scattering particles are curable resin composition comprising a metal oxide having an average particle diameter of 10 to 1000nm. The method according to claim 1,
The binder resin is a curable resin composition comprising a cardo-based binder resin. The method of claim 4,
The cardo-based binder resin is a curable resin composition, characterized in that it comprises a compound represented by the following formula (1).
[Formula 1]

(In Formula 1,
X is a group represented by the following formula (2),
Each Y is independently a residue of a dicarboxylic anhydride,
Z is each independently a residue of tetracarboxylic dianhydride,
l is an integer of 4 to 20.)
[Formula 2]

(In Chemical Formula 2, * means a hand bonded to a carbon atom or an oxygen atom.) The method according to claim 1,
The photopolymerizable compound is nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexylcarbitol acrylate, 2-hydroxyethyl acrylate, N-vinylpyrrolidone, 1 ,6-hexanedioldi(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, bis(acryloyloxy) of bisphenol A Ethyl) ether, 3-methylpentanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth) )Acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated A curable resin, characterized in that it is at least one selected from the group consisting of dipentaerythritol hexa (meth) acrylate, propoxylated dipentaerythritol hexa (meth) acrylate and dipentaerythritol hexa (meth) acrylate Composition. The method according to claim 1,
The thermosetting agent is a curable resin composition, characterized in that at least one selected from the group consisting of a monofunctional alicyclic epoxy resin, a novolak type epoxy resin, and a silane-modified epoxy resin. The method according to claim 1,
The curable resin composition further comprises one or more additives selected from the group consisting of a filler, another polymer compound, a dispersant, an adhesion promoter, an antioxidant and an anti-aggregation agent. The method according to claim 1,
Based on the total 100 parts by weight of the curable resin composition,
0.1 to 30 parts by weight of scattering particles;
2 to 20 parts by weight of a binder resin;
1 to 15 parts by weight of a polymerizable compound;
0.1 to 20 parts by weight of a thermosetting agent; And
Curable resin composition comprising 60 to 90 parts by weight of a solvent. The method according to claim 1,
The curable resin composition, characterized in that for forming a scattering layer. A scattering layer comprising a cured product of the curable resin composition according to any one of claims 1 to 10. An image display device comprising the scattering layer according to claim 11. The method of claim 12,
The image display device, wherein the image display device is a quantum dot display.

Images