Photo-polymerizable composition, optical element prepared therefrom, and display device

Abstract

The present invention relates to a photopolymerizable composition, an optical component formed therefrom, and a display device. The photopolymerizable composition can form an optical component exhibiting high flexibility and improved optical properties, and has viscosity characteristics suitable for inkjet processes, including high refractive index, excellent light transmittance, and low haze.

Description

Technical Field

[0001] The present invention relates to a photopolymerizable composition, an optical component formed therefrom, and a display device, the optical properties (including excellent light transmittance, low haze, and high refractive index) and mechanical and physical properties (including high flexibility and excellent bending reliability) of which are simultaneously improved. Prior Technology

[0002] For a transparent optical film with a structured prism, the rate of increase in brightness varies depending on the refractive index of the resin constituting the prism structure. Generally, the rate of increase in brightness increases with the increase in the refractive index of the resin constituting the prism. Therefore, research and development regarding this transparent optical film are moving towards increasing the refractive index of the resin constituting the prism.

[0003] For the high-refractive-index resins used to form the prisms, to ensure a high refractive index, they are usually formed in the form of metal oxides dispersed in organic compounds. Due to the use of metal oxides, the refractive index is high, but there are also problems with increased haze and reflectivity. If the reflectivity is high, the outdoor visibility of the display will decrease.

[0004] For the resins formed in the form of metal oxide dispersions, the product shelf life depends on the dispersion stability, making large-scale production difficult and leading to increased costs. Furthermore, compositions containing these metal oxides exhibit problems such as decreased inkjet processability due to increased viscosity, thus presenting numerous technical limitations.

[0005] Furthermore, when using conventional photopolymerizable components as monomers to form the resin and optical film, surface curing often fails to occur fully during the photocuring process due to the influence of oxygen in the air. As a result, the resin and optical film exhibit problems such as increased haze and decreased light transmittance or visibility, including reduced ultraviolet transmittance. In addition, insufficient surface curing leads to a decrease in the mechanical properties of the film, significantly reducing the high flexibility and bending reliability required for foldable devices. Therefore, considering the above problems, curing processes in an inert gas environment such as nitrogen are considered, but this could potentially lead to a significant increase in the manufacturing cost.

[0006] With the recent development of display-related technologies, deformable display devices that can be folded, rolled into a roll, or stretched like a rubber band are being developed and mass-produced. These displays can deform into various shapes, therefore the materials used also need to possess deformable mechanical properties.

[0007] However, due to the aforementioned problems, it has not yet been developed to the point where it exhibits viscosity characteristics suitable for inkjet processes and meets the requirements of excellent optical properties and high flexibility. Therefore, it is still necessary to develop technologies that can form optical films that exhibit excellent optical and mechanical properties. Summary of the Invention

[0008] Based on this, the present invention provides a photopolymerizable composition that exhibits viscosity characteristics suitable for inkjet processes and suppresses haze increase during curing, thereby enabling the formation of optical components that simultaneously improve optical properties (including excellent light transmittance, low haze, and high refractive index) and mechanical and physical properties (including high flexibility and excellent bending reliability).

[0009] The present invention also provides an optical component formed from the photopolymerizable composition, having improved optical properties (including excellent light transmittance, low haze and high refractive index) and mechanical properties (including high flexibility and excellent bending reliability).

[0010] In addition, the present invention provides a display device including the optical component.

[0011] This invention provides a photopolymerizable composition comprising: a) One or more high refractive index monomers with a liquid refractive index of 1.51 or higher before hardening; b) One or more highly flexible monomers; and c) Photopolymerization initiator.

[0012] The present invention also provides an optical component comprising: a substrate; and a hardened film comprising a hardened form of the photopolymerizable composition.

[0013] In addition, the present invention provides a display device including the optical component.

[0014] The photopolymerizable composition according to this specification exhibits viscosity characteristics suitable for inkjet processes, and can simultaneously form a hardened film with a high refractive index and optical components containing such a hardened film. Furthermore, the specific highly flexible monomers contained in this photopolymerizable composition improve the mechanical properties of the hardened material, such as flexibility and bending reliability. Additionally, the amine enhancer contained in this photopolymerizable composition significantly reduces the problem of reduced surface hardening caused by oxygen, resulting in optical components exhibiting low haze, excellent ultraviolet transmittance, and high visibility.

[0015] Furthermore, the curing process of this photopolymerizable composition does not require a nitrogen atmosphere, which can greatly improve the overall economic efficiency of the process.

[0016] Therefore, optical components formed from this photopolymer composition have low manufacturing costs and exhibit low haze, high refractive index, excellent light transmittance and visibility, as well as excellent flexibility and bending properties, which greatly helps to improve the characteristics of foldable or flexible display devices. Simple Explanation of the Diagram

[0017] none. Implementation

[0018] The invention will be described in more detail below. The terms or words used in this specification and the claims should not be construed as limited to their general or dictionary meanings, but should be interpreted as conforming to the technical concept of the invention, provided that the inventors can appropriately define the concepts of the terms to best describe the invention.

[0019] Furthermore, the term "comprising" as used in the specification of this invention indicates the presence of a certain characteristic, domain, integer, step, operation, element, and / or component, and does not exclude the presence of other characteristics, domains, integers, steps, operations, elements, and / or components.

[0020] In the instructions, "(meth)acrylate" can refer to either "acrylate" or "methacrylate".

[0021] The embodiments will be described in detail below to enable those skilled in the art to implement the invention. The embodiments can be implemented in various different ways and are not limited to the embodiments described below.

[0022] According to a specific embodiment of the present invention, a photopolymerizable composition can be provided, comprising: a) one or more high refractive index monomers with a liquid refractive index of 1.51 or higher before curing; b) one or more highly flexible monomers; and c) a photopolymerization initiator.

[0023] In one specific embodiment of the photopolymerizable composition, high refractive properties can be achieved using only high-refractive-index monomers without the presence of metal oxides, and cracking of the hardened film can be prevented by including highly flexible monomers with excellent elongation. Therefore, when an optical component with a hardened film formed from this photopolymerizable composition is used in a foldable or flexible display device, the performance of the display element can be improved. Furthermore, even though the photopolymerizable composition contains only high-refractive-index monomers and highly flexible monomers, it meets the appropriate viscosity range suitable for inkjet applications, enabling the hardened material to achieve excellent optical and mechanical properties.

[0024] Because this photopolymerizable composition does not use metal oxides, it exhibits excellent surface hardening properties during photocuring, thereby improving the haze characteristics, light transmittance, and visibility of the optical film, and avoiding an increase in manufacturing costs. In particular, by using a highly flexible monomer, cracking is prevented as described above, ensuring the excellent flexibility and bending reliability required for foldable or flexible devices. Furthermore, the curing process of this photopolymerizable composition does not require a nitrogen atmosphere, thus significantly improving the overall process economy.

[0025] Furthermore, this photopolymerizable composition further includes one or more components such as amine enhancers, photosensitizers, and surfactants, thereby improving the surface hardening properties of the film used to provide the hardened film. For example, the amine enhancer included in this photopolymerizable composition can significantly reduce the problem of reduced surface hardening caused by the influence of oxygen. This is because, during the hardening process, the amine groups included in the amine enhancer capture oxygen free radicals in the air, thereby further improving the reactivity of the polymerization initiator. In addition, the use of the photosensitizer can promote the polymerization reaction during photopolymerization. Furthermore, the use of the surfactant can impart effects such as improved film thickness uniformity or surface smoothness.

[0026] Therefore, when a photopolymerizable composition (containing not only the aforementioned high-refractive-index monomer, high-flexibility monomer, and photopolymerization initiator, but also additional components) is photocured to form a hardened film and optical components, a high degree of surface hardening is achieved even in an air environment. This allows the hardened film to exhibit low haze, excellent ultraviolet transmittance, and high visibility. In particular, the photopolymerizable composition exhibits high flexibility and significantly improved bending characteristics, and displays a viscosity suitable for inkjet printing, thereby improving the processability of coating and film formation. Furthermore, the curing process of this photopolymerizable composition does not require a nitrogen atmosphere, thus greatly improving the overall process economy.

[0027] Therefore, when using this photopolymerizable composition, it is possible to form optical components with low unit cost and exhibiting low haze, high refractive index, high flexibility, excellent light transmittance and visibility, thereby making a significant contribution to improving the characteristics of various types of display devices.

[0028] Specifically, the components used in this photopolymerizable composition are described below.

[0029] In one specific embodiment, the photopolymerizable composition, as a base monomer for forming a hardened film matrix, comprises one or more high refractive index monomers with a liquid refractive index of 1.51 or higher before hardening.

[0030] This high-refractive-index monomer can form a base resin, which, through a photocuring process described later, undergoes cross-linking polymerization of photocurable functional groups under the mediation of a photopolymerization initiator to form a cured film. In particular, because this high-refractive-index monomer satisfies a specific liquid crystal refractive index range, it can increase the refractive index of the cured film based on ultraviolet irradiation. More specifically, the liquid refractive index of the high-refractive-index monomer before curing can be between 1.51 and 1.60. When the liquid refractive index of the high-refractive-index monomer is below 1.51, there is a problem that the refractive index of the cured film decreases to below 1.58.

[0031] The high refractive index monomer can be an aromatic or alicyclic photocurable compound containing one or more aromatic rings or one or more heteroatoms.

[0032] Specifically, the high refractive index monomer can be an aromatic or alicyclic photocurable compound containing one or more aromatic rings or one or more heteroatoms and having photocurable functional groups with 10 to 40 carbon atoms.

[0033] More specifically, the high refractive index monomer can be an aromatic photocurable compound comprising the structure of the following chemical formula 1.

[0034] [Chemical Formula 1] B-Z1-Z2-R In the above chemical formula 1, B comprises any one or more of the following structures: an aryl group having 6 to 30 carbon atoms, a 5-7 membered aliphatic heterocyclic structure with one or more sulfur atoms (S) substituted, or a 5-7 membered aromatic heterocyclic structure with one or more sulfur atoms (S) substituted. Z1 series refers to alkyl groups with direct bonds or 1 to 10 carbon atoms. Z2 series refers to alkyl groups with 1 to 10 carbon atoms that are directly bonded or contain one or more oxygen (O) or sulfur (S) atoms. The R-series consists of photocurable functional groups.

[0035] The high refractive index monomer may contain a structure of chemical formula 1, wherein the B series is an aryl group with 6 to 30 carbon atoms, the Z1 series is a direct bond, and the Z2 series is an alkyl group with 1 to 10 carbon atoms containing one or more oxygen (O) atoms.

[0036] The high refractive index monomer may contain a structure of chemical formula 1, wherein the B series is an aryl group with 6 to 30 carbon atoms, the Z1 series is a direct bond, and the Z2 series contains one or more oxygen (O) and aromatic ring structures.

[0037] The high refractive index monomer may contain a structure of chemical formula 1, wherein the B series contains a 5-7 membered aromatic heterocyclic structure in which sulfur (S) is substituted, the Z1 series is a direct bond, and the Z2 series is an alkyl group containing one or more sulfur (S) atoms with a carbon number of 1 to 10.

[0038] The high-refractive-index monomer can be a liquid, but in the case of anthracene or sulfur-containing structures represented by the above chemical formula, it can exist in powder form instead of a liquid.

[0039] More specifically, the aforementioned high refractive index monomer may comprise one or more selected from the group consisting of benzyl (meth)acrylate, phenoxyethyl (meth)acrylate, phenoxybenzyl (meth)acrylate, o-phenylphenoxyethyl (meth)acrylate, biphenyl ethyl (meth)acrylate, and chemical formulas 2 to 8.

[0040] [Chemical Formula 2]

[0041] [Chemical Formula 3]

[0042] [Chemical Formula 4]

[0043] [Chemical Formula 5]

[0044] [Chemical Formula 6]

[0045] [Chemical Formula 7]

[0046] [Chemical Formula 8]

[0047] In the above chemical formulas 2 to 8, R is independently H or CH3.

[0048] In particular, when the high refractive index single system has an anthracene and sulfur-containing structure, the refractive index can be ensured to be above 1.61.

[0049] On the other hand, according to this specification, the highly flexible monomer is hardened together with the high refractive index monomer, thereby significantly improving the flexibility and bending properties of the hardened film and preventing cracking.

[0050] Specifically, the highly flexible monomer may contain one or more compounds with photocurable functional groups, which can increase the elongation of the final cured film by at least 5%.

[0051] The elongation can be determined as follows: after peeling a 20 μm thick film from the plain glass to prepare a dog bone-shaped specimen (28 mm x 4 mm), the elongation is measured using a tensile stress-strain curve obtained by UTM from Instron.

[0052] This highly flexible monomer may contain a structure of the following chemical formula 9.

[0053] [Chemical Formula 9] (A)mB-(A')n In the above chemical formula 9, A and A', as photocurable functional groups, can be the same or different. B, as an aliphatic structure with 6 to 50 carbon atoms, including or not including one or more oxygen atoms, must contain at least a straight-chain alkyl structure with 6 or more carbon atoms. m and n are integers that are either 0 or 1.

[0054] This highly flexible monomer can be a structure of chemical formula 9 containing 4 to 20 oxygen atoms.

[0055] More specifically, the highly flexible monomer may be one or more selected from the group consisting of aliphatic mono(meth)acrylates having 6 to 30 carbon atoms and aliphatic di(meth)acrylates having 6 to 30 carbon atoms. The viscosity of the highly flexible monomer may be 1 to 30 cP.

[0056] More specifically, the highly flexible monomer may comprise one or more of the group consisting of isodecyl methacrylate, lauryl methacrylate, stearyl methacrylate, ethoxyethyl methacrylate, ethoxyethyl methacrylate, triethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate and the following chemical formula 10.

[0057] [Chemical Formula 10]

[0058] In the above chemical formula 10, a + b = 0 ~ 10, where a and b are integers.

[0059] In the above chemical formula 10, a and b can each be an integer from 1 to 5.

[0060] Based on a total weight of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the high-flexibility monomer must contain at least 10 parts by weight. Specifically, the photopolymerizable composition must contain at least 10 parts by weight of the high-flexibility monomer to improve the flexibility of the hardened film.

[0061] More specifically, based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the high-flexibility monomer may contain 10 to 90 parts by weight. Additionally, based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the high-flexibility monomer may contain 10 to 40 parts by weight.

[0062] If the content of this highly flexible monomer is less than 10 parts by weight, the elongation after coating formation will be less than 5%, failing to improve flexibility. Furthermore, if the content of this highly flexible monomer is too high, exceeding 90 parts by weight, the refractive index will decrease, making it impossible to achieve a high refractive index of 1.58 or higher.

[0063] The photopolymerizable composition of one specific embodiment described above includes a photopolymerization initiator. This photopolymerization initiator can initiate and promote the photocuring reaction of the two specific monomers described above.

[0064] As such photopolymerization initiators, any initiator known to initiate and promote the photocuring reaction of photocurable functional groups such as (meth)acrylate groups can be used.

[0065] Examples of such photopolymerization initiators include one or more compounds selected from the group consisting of triazine, benzoin, benzophenone, imidazole, xanthonesone, oxime ester, and acetophenone compounds. More specific examples of such photopolymerization initiators include compounds selected from 2,4-bis(trichloromethyl)-6-p-methoxystyryl-s-triazine, 2-p-methoxystyryl-4,6-bis(trichloromethyl)-s-triazine, 2,4-trichloromethyl-6-triazine, 2,4-trichloromethyl-4-methylnaphthyl-6-triazine, 2-(o-chlorophenyl)-4,5-diphenylimidazolium dimer, 2-(o-chlorophenyl)-4,5-diphenylimidazolium dimer, etc. 2-Di(m-methoxyphenyl)imidazolium dimer, 2-(o-fluorophenyl)-4,5-diphenylimidazolium dimer, 2-(o-methoxyphenyl)-4,5-diphenylimidazolium dimer, 2-(o-methoxyphenyl)-4,5-diphenylimidazolium dimer, 2,4-di(p-methoxyphenyl)-5-phenylimidazolium dimer, 2-(2,4-dimethoxyphenyl)-4,5-diphenylimidazolium dimer, 2-(p-methylmercapto) phenyl)-4,5-diphenylimidazolium dimer, 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-(O-acetylgoxime), benzophenone, p-(diethylamino)benzophenone, 2,2-dichloro-4-phenoxyacetophenone, 2,2-diethoxyacetophenone, 2-dodecylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2,2-bis-2-chlorophenyl-4 5,4,5-Tetraphenyl-2-1,2-diimidazole, (E)-2-(acetoxyimino)-1-(9,9-diethyl-9H-fluoren-2-yl)butanone, (E)-1-(9,9-dibutyl-7-nitro-9H-fluoren-2-yl)acetone-O-acetyl oxime, (Z)-2-(acetoxyimino)-1-(9,9-diethyl-9H-fluoren-2-yl)acetone, Irgacure Compounds in the group consisting of 369, Irgacure 651, Irgacure 907, Darocur TPO, Irgacure 819, OXE-01, OXE-02, OXE-03, OXE-04, Idico N-1919, NCI-831 and NCI-930, and others, may also be widely used as photopolymerization initiators known in the art, without any other limitations.

[0066] Based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerizable composition may contain 0.5 to 30 parts by weight of a photopolymerization initiator. As another example, based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerization initiator may contain 0.6 to 28% by weight and 1 to 25% by weight. If the content of the photopolymerization initiator becomes too low, photocuring may not proceed smoothly. On the other hand, if the content of the photopolymerization initiator becomes too high, the cumulative transmittance of the cured film, etc., may decrease, for example, to below 90%.

[0067] On the other hand, a composition of a specific embodiment, without containing metal oxides, can also achieve an absolute viscosity suitable for inkjet printing processes by using the aforementioned high-refractive-index monomers and highly flexible monomers. Specifically, the absolute viscosity (measured at 25°C) of this photopolymerizable composition can be from 5 cP to 40 cP. Therefore, the composition of a specific embodiment containing these high-refractive-index monomers and highly flexible monomers exhibits excellent inkjet printing performance, as well as excellent heat resistance and mechanical properties, and can form a hardened film with good coating characteristics. Furthermore, through the interaction between the olefin monomer and the metal oxide particles described later, the hardened film and optical components formed using the composition of a specific embodiment can have a high refractive index of 1.58 or higher.

[0068] Incidentally, the absolute viscosity described in this specification refers to the absolute viscosity value measured at 25°C. This absolute viscosity can be measured using a viscometer well-known in the field, such as a Brinell viscometer.

[0069] On the other hand, a photopolymerizable composition of a specific embodiment may further include one or more selected from the group consisting of d) amine enhancers having amine and photocurable functional groups, e) photosensitizers and f) surfactants. The further inclusion of any one or more of the above-described components d) to f) as additives can help the photopolymerizable composition achieve its physical properties more effectively.

[0070] First, the photopolymerizable composition of one specific embodiment may include an amine synergist having amine groups and photocurable functional groups. With this amine synergist, during the photocuring of the composition of one specific embodiment to form a hardened film and optical components, the amine groups contained therein capture oxygen free radicals in the air, thereby promoting the reaction of the initiator. Furthermore, the photocurable functional groups in the amine synergist can form crosslinking bonds with the monomer. Under the action of this amine synergist, the hardened film and optical components formed from the composition of one specific embodiment can exhibit high surface hardening, thereby exhibiting excellent optical properties such as low haze and improved light transmittance.

[0071] The amine enhancer may comprise one of compounds selected from the group consisting of compounds having at least three amine groups and photopolymerizable acrylate groups in their molecules.

[0072] Specifically, as the amine enhancer, any compound that has a functional group, together with the amine group in the molecule, capable of forming a cross-linking bond with the photocurable functional group, such as the photocurable functional group of the aforementioned monomer, can be used. In a more specific example, the functional group is the same type of photocurable functional group as the monomer, which may be a (meth)acrylate group. Furthermore, in order to more effectively capture oxygen free radicals and the like to further improve the surface hardness of the hardened film, the amine enhancer more preferably contains a tertiary amine structure or higher in the molecule.

[0073] Specific examples of such amine reinforcing agents include compounds selected from those of chemical formula 11, namely ethyl dimethylaminobenzoate, butoxyethyl dimethylaminobenzoate, bis(diethylamino)benzophenone, bis(2-hydroethyl)-toluidine, ethylhexyl-(dimethylamino)benzoate, 2-(dimethylamino)ethyl(meth)acrylate, diethylaminoethyl(meth)acrylate, 2-(diisopropylamino)ethyl(meth)acrylate, and 4-(dimethylamino)ethyl(meth)acrylate. It may be one or more of the group consisting of 2-(acryloyloxy)ethyl4-(dimethylamino)benzoate, 2-ethylhexyl4-(dimethylamino)benzoate, 4,4-(ethyl2-(dibutylamino)methylacrylate) and 4,4-(oxybis(ethane-2,1-diyl))bis(oxy)bis(dimethylaniline)), in addition to which various compounds having amine and photocurable functional groups may also be used.

[0074] [Chemical Formula 11]

[0075] In the above chemical formula 11, R1 and R2 each independently represent an alkyl group having 1 to 5 carbon atoms, and R3 represents an alkyl group having 1 to 20 carbon atoms, an ether group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an amino group, or a (meth)acrylate group.

[0076] Alternatively, commercially available photocurable amine compounds can be used as amine enhancers. Examples of such commercial compounds include P115 (supplied by SK Cytec), MIRAMER AS2010 (supplied by Miwon Commercial Co., Ltd.), or MIRAMER AS5142 (supplied by Miwon Commercial Co., Ltd.).

[0077] In addition, based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerizable composition may also contain 0.1 to 10 parts by weight of an amine reinforcing agent. As another example, based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the amine reinforcing agent (d) may contain 0.5 to 9 parts by weight. If the content of the amine reinforcing agent becomes too low, the surface hardening degree will decrease, and the haze of the hardened film and optical components may increase. On the other hand, if the content of the amine reinforcing agent becomes too high, the viscosity of the photopolymerizable composition will become too high, which may lead to a decrease in processability or a decrease in the refractive index of the hardened film, etc.

[0078] The e) photosensitizer is included in the photopolymerizable composition, which further increases the curing properties of the high refractive index monomer and the high flexibility monomer, thereby giving the effect of improving the haze properties and increasing sensitivity.

[0079] The photosensitizer may be selected from one or more of the group consisting of isopropyl thioxanthone, pyrene, perylene, triphenylene, anthracene, 9,10-dibutoxyanthracene, 9,10-diethoxyanthracene, 3,7-dimethoxyanthracene, and 9,10-dipropyloxyanthracene.

[0080] Based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerizable composition may also contain 0.1 to 10 parts by weight of a photosensitizer. As another example, based on 100 parts by weight of the total amount of the high-refractive-index monomer and the high-flexibility monomer, the photosensitizer (e) may contain 0.5 to 9 parts by weight. If the content of the photosensitizer becomes too low, it will not help improve the surface hardening degree. On the other hand, if the content of the photosensitizer becomes too high, the viscosity of the photopolymerizable composition will become too high, resulting in decreased processability or decreased transmittance of the hardened film, etc.

[0081] The surfactant can improve film thickness uniformity or surface smoothness.

[0082] The surfactant may include one or more species selected from the group consisting of silicon-based and fluorine-based surfactants.

[0083] Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the surfactant (f) may contain 0.1 to 5 parts by weight. If the content of the surfactant becomes too low, problems such as poor film thickness uniformity or surface smoothness may occur. On the other hand, if the content of the surfactant becomes too high, problems such as the generation of bubbles in the film or a decrease in inkjet characteristics may occur.

[0084] On the other hand, for a specific embodiment of the photopolymerizable composition, in addition to the components described above, a dispersant may also be included as needed. The inclusion of such a dispersant in the photopolymerizable composition can improve the dispersion stability of the other components.

[0085] There are no particular restrictions on the type of dispersant; any known dispersant that can improve dispersibility can be used. Examples of such dispersants include one or more selected from the group consisting of acrylic dispersants, epoxy dispersants, and silicone dispersants.

[0086] Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the dispersant may contain 0.1 to 30 parts by weight or 0.5 to 20 parts by weight. Depending on the content of the dispersant, the components are more uniformly dispersed, thereby more effectively achieving the desired refractive index range of the hardened film. However, if the content of the dispersant becomes too high, the viscosity of the photopolymerizable composition increases, which may reduce the inkjet processability.

[0087] Furthermore, the composition of the above-described specific embodiment can be formulated as a solvent-free composition that does not contain other solvents or liquid media. This further improves the processability of using the composition of this specific embodiment.

[0088] For a specific embodiment of the photopolymerizable composition containing the above-mentioned components, the absolute viscosity (measured at 25°C) can be from 5 cP to 40 cP or from 5 cP to 30 cP. This absolute viscosity can be measured using a known viscometer such as a Brinell viscometer. When the photopolymerizable composition of a specific embodiment meets such a viscosity range, a hardened film with excellent heat resistance and mechanical properties can be formed, exhibiting not only excellent inkjet processability but also good coating properties based on the inkjet process.

[0089] If the viscosity of the final composition becomes too low, the dispensing characteristics may decrease due to nozzle drying and clogging. Conversely, if the viscosity of the composition is too high, there may be issues with reduced dispensing volume or failure to form patterns and surfaces.

[0090] On the other hand, according to another specific embodiment of the present invention, a cured film comprising a cured material containing the above-mentioned photopolymerizable composition and an optical component comprising the cured film are provided. Such an optical component may comprise a substrate; and the cured film formed on the substrate. Furthermore, the cured film is formed by photocuring a photopolymerizable composition, as described in one embodiment, onto a substrate via an inkjet process. Therefore, it may primarily comprise a cured material containing a polymer having units crosslinked with photocurable functional groups of the olefin monomer and amine reinforcing agent, a dispersant dispersed on the polymer, and a metal oxide.

[0091] More specifically, the cured material comprises an olefin resin formed by curing crosslinking of a high-refractive-index monomer and a highly flexible monomer, the olefin resin optionally being further crosslinked with the photocurable functional groups of the amine reinforcing agent. Furthermore, the olefin resin, together with one or more selected from the group consisting of the aforementioned photosensitizers and surfactants, can improve photopolymerizability and film properties. In this case, the olefin resin is a polymer formed by crosslinking and polymerizing one or more high-refractive-index monomers having photocurable functional groups and one or more highly flexible monomers; its form is not limited, and depending on the type of monomer and the mechanism of the polymerization reaction, it can be in various forms such as homopolymers, block copolymers, random copolymers, or graft copolymers.

[0092] On the other hand, according to another specific embodiment of the present invention, an optical component may be provided, comprising: a substrate; and a hardened film comprising a hardened form of the aforementioned highly flexible photopolymerizable composition for inkjet printing.

[0093] Since the aforementioned hardened film containing the hardener is formed using a photopolymerizable composition having a viscosity suitable for inkjet printing processes in a specific embodiment, it exhibits excellent heat resistance, mechanical properties, and good coating characteristics. Furthermore, the hardened film can have a haze of 3% or less, a refractive index of 1.58 or more, and an elongation of 5% or more.

[0094] Specifically, for this hardened film, with a wavelength of 565 nm as a reference, the refractive index after photopolymerization can be 1.58 or higher. More specifically, the hardened film can have a high refractive index, which can be 1.6 or higher, or 1.6 to 2.0, or 1.6 to 1.65. In this case, the refractive index can be measured using an ellipsometer at a wavelength of 555 to 575 nm (average).

[0095] In addition, the amine enhancer exhibits high surface hardening, such as low haze and excellent light transmittance and visibility, with haze of less than 3%, less than 1%, 0 to 1%, 0.01 to 0.8%, or 0.1 to 0.3%.

[0096] In addition, for this hardened film, a dog bone-shaped specimen (28mm x 4mm) was prepared by peeling a 20μm thick film from the plain glass. The elongation was then measured by using the tensile stress-strain curve measured by Instron's UTM. The elongation could be 5% or more, or 5 to 10%, or 10% or more.

[0097] In the aforementioned optical components, a well-known substrate such as plain glass can be used as the substrate.

[0098] Furthermore, this optical component can be manufactured by applying the photopolymerizable composition of the above-described specific embodiment to the substrate using a mayer bar, a coating applicator, or an inkjet printer, and then photocuring it, for example, by exposure to an LED lamp or a metal halide lamp in an air environment. In this case, the photopolymerizable composition can be photocured after being coated into a single film, thereby forming an optical component in the form of a general optical film. Alternatively, it can be photocured after being coated with an inkjet printer into a patterned shape as needed. In this case, the optical component can be formed as a patterned film on the substrate, for example, a patterned film with a patterned polyhedral structure such as a prism.

[0099] Optical components such as optical films or patterned films mentioned above can have a general thickness, depending on their type or the structure of the display element to which they are applied, for example, a thickness that can be adjusted in the range of 0.01 μm to 1000 μm.

[0100] Furthermore, for this optical component, the sensitivity value can be below 3 J, and the transmittance can be above 90%. This sensitivity can be measured by comparing the absorbance measurements before and after exposure using an FT-IR spectrophotometer. More specifically, the conversion efficiency is calculated by integrating the C=O peak at 1650–1750 cm⁻¹ and the C=C peak at 780–880 cm⁻¹; the sensitivity refers to the exposure at which saturation occurs with a conversion efficiency of 80% or higher. Additionally, the transmittance refers to the average transmittance measured for optical components such as optical films using a UV-VIS spectrophotometer at wavelengths between 380 and 780 nm.

[0101] Furthermore, for this optical film, when heated from room temperature to 900°C at a rate of 10°C per minute, the temperature at which a 5% weight loss is measured by TGA is above 270°C, thus demonstrating excellent heat resistance.

[0102] The optical components of other specific embodiments of the aforementioned optical films or patterned films satisfy excellent optical properties, heat resistance, and mechanical properties, and therefore can be applied to various display devices, making a significant contribution to improving performance.

[0103] Therefore, according to another specific embodiment of the present invention, a display device including the optical component is provided.

[0104] The structure of a display device that uses optical components such as optical films or patterned films may have conventional structures well known in the art, in addition to using optical components of the other specific embodiments described above, and therefore its detailed description is omitted.

[0105] The following examples are provided to aid in understanding the present invention. However, the following examples are merely illustrative and the present invention is not limited to the following examples.

[0106] [Examples 1 to 309, Comparative Examples 1 to 44, and Reference Examples 1 to 9]

[0107] Preparation of photopolymerizable components and optical films

[0108] First, the monomers and components used to prepare the photopolymerizable compositions of the Examples, Comparative Examples and Reference Examples are those listed in Tables 1 to 5 below.

[0109] [Table 1] High refractive index monomers 1 benzyl acrylate 2 Phenoxyethyl acrylate 3 Phenoxybenzyl acrylate 4 methyl biphenyl acrylate 5 o-Phenoxyethyl acrylate 6 Chemical formula 1 (R=H) 7 Chemical formula 1 (R=CH 3) 8 Chemical formula 2 (R=H) 9 Chemical formula 2 (R=CH 3) 10 Chemical formula 3 (R=H) 11 Chemical formula 3 (R=CH 3) 12 Chemical formula 4 (R=H) 13 Chemical formula 4 (R=CH 3) 14 Chemical formula 5 (R=H) 15 Chemical formula 5 (R=CH 3) 16 Chemical formula 6 (R=H) 17 Chemical formula 6 (R=CH 3) 18 Chemical formula 7 (R=H) 19 Chemical formula 7 (R=CH 3)

[0110] [Table 2] Highly flexible monomers 1 Isodecyl acrylate 2 Lauryl acrylate 3 Stearic acid 4 ethoxyethyl acrylate 5 ethoxyethyl acrylate 6 Triethylene glycol diacrylate 7 Tetraethylene glycol diacrylate 8 Dipropylene glycol diacrylate 9 Tripropylene glycol diacrylate 10 Chemical formula 8 (a, b=0) 11 Chemical formula 8 (a, b=2) 12 In chemical formula 8 (a+b>10)

[0111] [Table 3] Photoinitiator 1 1-[9-Ethyl-6-(2-methylbenzoyl)-9H-carbazole-3-yl]-(O-acetylgoxime) 2 OXE-01 3 OXE-04 4 Darocure TPO 5 (E)-2-(ethoxyimino)-1-(9,9-diethyl-9H-fluoren-2-yl)butanone 6 Irgacure 819 7 Irgacure 369 8 Irgacure 907

[0112] [Table 4] Amine enhancer 1 Ethyl dimethylaminobenzoate 2 Butoxyethyl dimethylaminobenzoate 3 Diethylaminoethyl methacrylate 4 P115 (provided by SK Cytec) 5 MIRAMER AS2010 (Provided by Miwon Commercial Co., Ltd) 6 MIRAMER AS5142 (Provided by Miwon Commercial Co., Ltd)

[0113] [Table 5] photosensitizer 1 Isopropylthioxanthone, 2 9,10-Dibutoxyanthracene 3 9,10-Diethoxyanthracene 4 3,7-Dimethoxyanthracene

[0114] In addition, the components were mixed according to the components in Tables 6 to 14 below to prepare the photopolymerizable compositions of the Examples and Comparative Examples. In Tables 6 to 14, the units of content are parts by weight.

[0115] After the photopolymerizable components are placed into an inkjet printer, they are coated onto bare glass to form a single film with a thickness of 20 μm.

[0116] Then, a single film was irradiated with an LED 385nm curing machine at an exposure dose of 1.5 J / cm² to prepare a cured coating containing photopolymerizable components. This coating (thickness: 20 μm) was provided as an optical film. However, when measuring the refractive index, a 2 μm coating was provided by spin coating.

[0117] [Table 6] Classification High refractive index monomer 1 Highly flexible monomer 1 Photoinitiator type content type content 1 Example 1 1 90 1 10 0.5 Example 2 1 80 2 20 1 Example 3 1 70 3 30 5 Example 4 1 60 4 40 8 Example 5 1 50 5 50 10 Example 6 1 40 6 60 15 Example 7 1 30 7 70 20 Example 8 1 20 8 80 25 Example 9 1 10 9 90 30 Example 10 2 90 10 10 0.5 Example 11 2 80 11 20 1 Example 12 2 70 1 30 5 Example 13 2 60 2 40 8 Example 14 2 50 3 50 10 Example 15 2 40 4 60 15 Example 16 2 30 5 70 20 Example 17 2 20 6 80 25 Example 18 2 10 7 90 30 Example 19 3 90 8 10 0.5 Example 20 3 80 9 20 1 Example 21 3 70 10 30 5 Example 22 3 60 11 40 8 Example 23 3 50 1 50 10 Example 24 3 40 2 60 15 Example 25 3 30 3 70 20 Example 26 3 20 4 80 25 Example 27 3 10 5 90 30 Example 28 4 90 6 10 0.5 Example 29 4 80 7 20 1 Example 30 4 70 8 30 5 Example 31 4 60 9 40 8 Example 32 4 50 10 50 10 Example 33 4 40 11 60 15 Example 34 4 30 1 70 20 Example 35 4 20 2 80 25 Example 36 4 10 3 90 30 Example 37 5 90 4 10 0.5 Example 38 5 80 5 20 1 Example 39 5 70 6 30 5 Example 40 5 60 7 40 8 Example 41 5 50 8 50 10 Example 42 5 40 9 60 15 Example 43 5 30 10 70 20 Example 44 5 20 11 80 25 Example 45 5 10 1 90 30 Example 46 6 90 2 10 0.5 Example 47 6 80 3 20 1 Example 48 6 70 4 30 5 Example 49 6 60 5 40 8 Example 50 6 50 6 50 10

[0118] [Table 7] Classification High refractive index monomer 1 Highly flexible monomer 1 Photoinitiator type content type content 1 Example 51 6 40 7 60 15 Example 52 6 30 8 70 20 Example 53 6 20 9 80 25 Example 54 6 10 10 90 30 Example 55 7 90 11 10 0.5 Example 56 7 80 1 20 1 Example 57 7 70 2 30 5 Example 58 7 60 3 40 8 Example 59 7 50 4 50 10 Example 60 7 40 5 60 15 Example 61 7 30 6 70 20 Example 62 7 20 7 80 25 Example 63 7 10 8 90 30 Example 64 8 90 9 10 0.5 Example 65 8 80 10 20 1 Example 66 8 70 11 30 5 Example 67 8 60 1 40 8 Example 68 8 50 2 50 10 Example 69 8 40 3 60 15 Example 70 8 30 4 70 20 Example 71 8 20 5 80 25 Example 72 8 10 6 90 30 Example 73 9 90 7 10 0.5 Example 74 9 80 8 20 1 Example 75 9 70 9 30 5 Example 76 9 60 10 40 8 Example 77 9 50 11 50 10 Example 78 9 40 1 60 15 Example 79 9 30 2 70 20 Example 80 9 20 3 80 25 Example 81 9 10 4 90 30 Example 82 10 90 5 10 0.5 Example 83 10 80 6 20 1 Example 84 10 70 7 30 5 Example 85 10 60 8 40 8 Example 86 10 50 9 50 10 Example 87 10 40 10 60 15 Example 88 10 30 11 70 20 Example 89 10 20 1 80 25 Example 90 10 10 2 90 30 Example 91 11 90 3 10 0.5 Example 92 11 80 4 20 1 Example 93 11 70 5 30 5 Example 94 11 60 6 40 8 Example 95 11 50 7 50 10 Example 96 11 40 8 60 15 Example 97 11 30 9 70 20 Example 98 11 20 10 80 25 Example 99 11 10 11 90 30 Example 100 12 90 1 10 0.5

[0119] [Table 8] Classification High refractive index monomer 1 Highly flexible monomer 1 Photoinitiator type content type content 1 Example 101 12 80 2 20 1 Example 102 12 70 3 30 5 Example 103 12 60 4 40 8 Example 104 12 50 5 50 10 Example 105 12 40 6 60 15 Example 106 12 30 7 70 20 Example 107 12 20 8 80 25 Example 108 12 10 9 90 30 Example 109 13 90 10 10 0.5 Example 110 13 80 11 20 1 Example 111 13 70 1 30 5 Example 112 13 60 2 40 8 Example 113 13 50 3 50 10 Example 114 13 40 4 60 15 Example 115 13 30 5 70 20 Example 116 13 20 6 80 25 Example 117 13 10 7 90 30 Example 118 14 90 8 10 0.5 Example 119 14 80 9 20 1 Example 120 14 70 10 30 5 Example 121 14 60 11 40 8 Example 122 14 50 1 50 10 Example 123 14 40 2 60 15 Example 124 14 30 3 70 20 Example 125 14 20 4 80 25 Example 126 14 10 5 90 30 Example 127 15 90 6 10 0.5 Example 128 15 80 7 20 1 Example 129 15 70 8 30 5 Example 130 15 60 9 40 8 Example 131 15 50 10 50 10 Example 132 15 40 11 60 15 Example 133 15 30 1 70 20 Example 134 15 20 2 80 25 Example 135 15 10 3 90 30 Example 136 16 90 4 10 0.5 Example 137 16 80 5 20 1 Example 138 16 70 6 30 5 Example 139 16 60 7 40 8 Example 140 16 50 8 50 10 Example 141 16 40 9 60 15 Example 142 16 30 10 70 20 Example 143 16 20 11 80 25 Example 144 16 10 1 90 30 Example 145 17 90 2 10 0.5 Example 146 17 80 3 20 1 Example 147 17 70 4 30 5 Example 148 17 60 5 40 8 Example 149 17 50 6 50 10 Example 150 17 40 7 60 15

[0120] [Table 9] Classification High refractive index Monomer 1 High flexibility Monomer 1 Photoinitiator photosensitizer Amine enhancer type content type content 1 2 3 4 5 6 7 8 1 1 Example 151 17 30 8 70 20 Example 152 17 20 9 80 25 Example 153 17 10 10 90 30 Example 154 18 90 11 10 0.5 Example 155 18 80 1 20 1 Example 156 18 70 2 30 5 Example 157 18 60 3 40 8 Example 158 18 50 4 50 10 Example 159 18 40 5 60 15 Example 160 18 30 6 70 20 Example 161 18 20 7 80 25 Example 162 18 10 8 90 30 Example 163 19 90 9 10 0.5 Example 164 19 80 10 20 1 Example 165 19 70 11 30 5 Example 166 19 60 1 40 8 Example 167 19 50 2 50 10 Example 168 19 40 3 60 15 Example 169 19 30 4 70 20 Example 170 19 20 5 80 25 Example 171 19 10 6 90 30 Example 182 3 60 4 40 0.5 3 Example 183 3 60 4 40 1 3 Example 184 3 60 4 40 5 3 Example 185 3 60 4 40 10 3 Example 186 3 60 4 40 15 3 Example 187 3 60 4 40 30 3 Example 182 3 60 4 40 0.5 3 Example 183 3 60 4 40 1 3 Example 184 3 60 4 40 5 3 Example 185 3 60 4 40 10 3 Example 186 3 60 4 40 15 3 Example 187 3 60 4 40 30 3 Example 182 3 60 4 40 0.5 3 3 Example 183 3 60 4 40 1 3 3 Example 184 3 60 4 40 5 3 3 Example 185 3 60 4 40 10 3 3 Example 186 3 60 4 40 15 3 3 Example 187 3 60 4 40 30 3 3 Example 188 3 60 6 40 8 0.1 Example 189 3 60 6 40 8 1 Example 190 3 60 6 40 8 5 Example 191 3 60 6 40 8 10 Example 192 3 60 6 40 8 0.1 Example 193 3 60 6 40 8 1 Example 194 3 60 6 40 8 5 Example 195 3 60 6 40 8 10 Example 196 3 60 6 40 8 Example 197 3 60 6 40 8 Example 198 3 60 6 40 8 Example 199 3 60 6 40 8 Example 200 3 60 6 40 8 Example 201 3 60 6 40 8 Example 202 3 60 6 40 8

[0121] [Table 10] Classification High refractive index Monomer 1 High flexibility Monomer 1 Photoinitiator photosensitizer Amine enhancer type content type content 1 2 3 4 5 6 7 8 2 3 4 2 3 4 5 6 Example 203 3 60 6 40 8 3 Example 204 3 60 6 40 8 3 Example 205 3 60 6 40 8 3 Example 206 3 60 6 40 8 3 Example 207 3 60 6 40 8 3 Example 208 3 60 6 40 8 3 Example 209 3 60 6 40 8 3 Example 210 3 60 6 40 8 3 Example 211 3 60 6 40 8 3 3 Example 212 3 60 6 40 8 3 3 Example 213 3 60 6 40 8 3 3 Example 214 3 60 6 40 8 3 3 Example 215 3 60 6 40 8 3 3 Example 216 3 60 6 40 8 3 3 Example 217 3 60 6 40 8 3 3 Example 218 3 60 6 40 8 3 3 Example 219 3 60 6 40 8 3 3 Example 220 3 60 6 40 8 3 3 Example 221 3 60 6 40 8 3 3 Example 222 3 60 6 40 8 3 3 Example 223 3 60 6 40 8 3 3 Example 224 3 60 6 40 8 3 3 Example 225 3 60 6 40 8 3 3

[0122] [Table 11] Classification High refractive index Monomer 1 High refractive index Monomer 2 High flexibility Monomer 1 High flexibility Monomer 2 Photoinitiator type content type content type content type content 1 Example 226 4 30 10 30 4 40 0.5 Example 227 4 40 10 20 4 40 1 Example 228 4 50 10 10 4 40 5 Example 229 4 30 13 30 4 40 10 Example 230 4 40 13 20 4 40 15 Example 231 4 50 13 10 4 40 30 Example 232 4 55 13 5 4 40 0.5 Example 233 5 30 15 30 4 40 1 Example 234 5 40 15 20 4 40 5 Example 235 5 50 15 10 4 40 10 Example 236 5 55 15 5 4 40 15 Example 237 5 30 15 30 5 15 11 25 30 Example 238 5 40 15 20 5 20 11 20 0.5 Example 239 5 50 15 10 5 25 11 15 1 Example 240 5 55 15 5 5 30 11 10 5 Example 241 3 60 5 15 11 25 10 Example 242 3 60 5 20 11 20 15 Example 243 3 60 5 25 11 15 30 Example 244 3 60 5 30 11 10 5

[0123] [Table 12] Classification High refractive index Monomer 1 High refractive index Monomer 2 High flexibility Monomer 1 High flexibility Monomer 2 Photoinitiator photosensitizer Amine enhancer type content type content type content type content 1 1 1 Example 245 1 70 1 30 5 3 5 Example 246 2 70 1 30 5 3 5 Example 247 3 70 1 30 5 3 5 Example 248 4 70 1 30 5 3 5 Example 249 5 70 1 30 5 3 5 Example 250 6 70 1 30 5 3 5 Example 251 7 70 1 30 5 3 5 Example 252 8 70 1 30 5 3 5 Example 253 9 70 1 30 5 3 5 Example 254 4 10 1 90 5 3 5 Example 255 4 30 1 70 5 3 5 Example 256 4 50 1 50 5 3 5 Example 257 4 60 1 40 5 3 5 Example 258 4 80 1 20 5 3 5 Example 259 4 90 1 10 5 3 5 Example 260 4 70 2 30 5 3 5 Example 261 4 70 3 30 5 3 5 Example 262 4 70 4 30 5 3 5 Example 263 4 70 5 30 5 3 5 Example 264 4 70 6 30 5 3 5 Example 265 4 70 7 30 5 3 5 Example 266 4 70 8 30 5 3 5 Example 267 4 70 9 30 5 3 5 Example 268 4 70 10 30 5 3 5 Example 269 4 70 11 30 5 3 5 Example 270 4 55 6 15 1 30 5 3 5 Example 271 4 40 6 30 1 30 5 3 5 Example 272 4 55 7 15 1 30 5 3 5 Example 273 4 40 7 30 1 30 5 3 5 Example 274 4 55 8 15 1 30 5 3 5 Example 275 4 40 8 30 1 30 5 3 5 Example 276 4 55 9 15 1 30 5 3 5 Example 277 4 40 9 30 1 30 5 3 5 Example 278 4 70 1 15 3 15 5 3 5 Example 279 4 70 1 20 3 10 5 3 5 Example 280 4 70 5 15 10 15 5 3 5 Example 281 4 70 5 20 10 10 5 3 5

[0124] [Table 13] Classification High refractive index Monomer 1 High flexibility Monomer 1 Photoinitiator photosensitizer Amine enhancer type content type content 1 2 3 4 5 6 7 8 1 2 3 4 1 2 3 4 5 6 Example 282 4 70 1 30 5 3 5 Example 283 4 70 1 30 5 3 5 Example 284 4 70 1 30 5 3 5 Example 285 4 70 1 30 5 3 5 Example 286 4 70 1 30 5 3 5 Example 287 4 70 1 30 5 3 5 Example 288 4 70 1 30 5 3 5 Example 289 4 70 1 30 5 3 5 Example 290 4 70 1 30 5 3 5 Example 291 4 70 1 30 5 3 5 Example 292 4 70 1 30 5 3 5 Example 293 4 70 1 30 5 3 5 Example 294 4 70 1 30 5 3 5 Example 295 4 70 1 30 5 3 5 Example 296 4 70 1 30 5 3 5 Example 297 4 70 1 30 5 3 0.1 Example 298 4 70 1 30 5 3 1 Example 299 4 70 1 30 5 3 3 Example 300 4 70 1 30 5 3 7 Example 301 4 70 1 30 5 3 10 Example 302 4 70 1 30 5 0.1 5 Example 303 4 70 1 30 5 1 5 Example 304 4 70 1 30 5 5 5 Example 305 4 70 1 30 5 7 5 Example 306 4 70 1 30 5 10 5 Example 307 4 70 1 30 10 3 5 Example 308 4 70 1 30 15 3 5 Example 309 4 70 1 30 30 3 5

[0125] [Table 14] Classification High refractive index Monomer 1 High flexibility Monomer 1 Photoinitiator photosensitizer Amine enhancer type content type content 1 2 3 4 5 6 7 8 1 2 Comparative Example 1 1 100 1 Comparative Example 2 1 100 0.4 Comparative Example 3 1 100 31 Reference Example 1 1 91 1 9 8 See Example 2 2 91 2 9 8 See Example 3 3 91 3 9 8 See Example 4 4 91 4 9 8 See Example 5 5 91 5 9 8 See Example 6 6 91 6 9 8 See Example 7 7 91 7 9 8 See Example 8 8 91 8 9 8 See Example 9 9 91 9 9 8 See Example 10 10 91 10 9 8 See Example 11 11 91 11 9 8 See Example 12 12 91 1 9 8 See Example 13 13 91 2 9 8 See Example 14 14 91 3 9 8 See Example 15 15 91 4 9 8 See Example 16 16 91 5 9 8 See Example 17 17 91 6 9 8 See Example 18 18 91 7 9 8 See Example 19 19 91 8 9 8 See Example 20 17 60 6 40 8 11 See Example 21 18 60 7 40 8 11 See Example 22 19 60 8 40 8 11 11 See Example 23 4 91 1 9 5 3 5 See Example 24 4 70 1 30 5 3 See Example 25 4 70 1 30 5 5 See Example 26 4 70 1 30 5 See Example 27 1 90 12 10 8 3 5 See Example 28 1 80 12 20 8 3 5 See Example 29 1 70 12 30 8 3 5 See Example 30 1 60 12 40 8 3 5 See Example 31 1 50 12 50 8 3 5 See Example 32 1 40 12 60 8 3 5 See Example 33 1 30 12 70 8 3 5 See Example 34 1 20 12 80 8 3 5 See Example 35 1 10 12 90 8 3 5

[0126] [Experimental Example]

[0127] For the optical films prepared in the examples, comparative examples and reference examples, the refractive index, haze and viscosity and other physical properties were measured by the following methods, and the results are shown in Tables 15 to 22.

[0128] *Methods for determining the physical properties of optical films

[0129] 1) Sensitivity The absorbance was measured by comparing the results before and after exposure using an FT-IR spectrophotometer. The conversion efficiency was calculated by integrating the C=O peak at 1650–1750 cm⁻¹ and the C=C peak at 780–880 cm⁻¹. Sensitivity refers to the exposure at which saturation occurs with a conversion efficiency of 80% or higher. determination ○: Sensitivity values ​​below 3J X: Sensitivity value greater than 3J

[0130] 2) Refractive index For the unrefined glass with the above-mentioned 2μm coating, the refractive index (555~575nm, average: 565nm wavelength) was measured using an ellipsometry. determination ◎: The measured refractive index of the coating is 1.61 or higher. ○: The measured refractive index of the coating is 1.58 or higher and less than 1.61. X: Cases where the measured refractive index of the coating is less than 1.58.

[0131] 3) Transmittance The average transmittance of the formed coating was measured using a UV-VIS spectrophotometer (Cary 4000, Agilent) at a range of 380–780 nm. determination ○: Cases where the average transmittance is 90% or higher X: Case where the average transmittance value is less than 90%.

[0132] 4) Haze The haze was measured using a NIPPON DENSHOKU COH 400 haze meter. determination ◎: Cases where the haze measurement value is less than 1.0 ○: Cases where the haze measurement value is between 1.0 and 3.0 or below. X: Haze measurement value greater than 3.0

[0133] 5) Viscosity (absolute viscosity) The viscosity of each photopolymerizable component or olefin monomer in the above reference examples and embodiments was measured using a viscometer (trade name: Brook Field viscometer) at a temperature of 25°C. determination ○: Cases with viscosity values ​​of 5 to 40 cP X: Viscosity values ​​exceeding the above range

[0134] 6) Inkjet characteristics Change the nozzle temperature of the inkjet equipment and confirm whether a surface is formed. determination The surface formed at a nozzle temperature of 25 to 35°C = ◎ The surface formed at a nozzle temperature of 35 to 50°C is ○. No surface is formed at nozzle temperatures between 25 and 50°C = X

[0135] 7) Flexible For flexibility, measurements were performed using an Instron UTM. Specifically, a fabrication with a thickness of 20 μm and dimensions of 28 mm x 4 mm was prepared, and the tensile strain was measured using an Instron UTM. Elongation was then evaluated using the tensile stress-strain curve obtained from the tensile strain. determination ◎: Tensile Strain is 10% or more (meaning the elongation measured by the tensile stress-strain curve is 10% or more). ○: Tensile Strain is 5% or more but less than 10% (meaning the elongation measured by the tensile stress-strain curve is 5% or more but less than 10%). △: Tensile Strain is 1% or more but less than 5% (meaning the elongation measured by the tensile stress-strain curve is 1% or more but less than 5%). X: Tensile Strain less than 1% (meaning the elongation measured by the tensile stress-strain curve is less than 1%)

[0136] [Table 15] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 1 ○ ◎ ○ ○ ○ ◎ ◎ Example 2 ○ ◎ ○ ○ ○ ◎ ◎ Example 3 ○ ◎ ○ ○ ○ ◎ ◎ Example 4 ○ ○ ○ ○ ○ ◎ ◎ Example 5 ○ ○ ○ ○ ○ ◎ ○ Example 6 ○ ○ ○ ○ ○ ◎ ○ Example 7 ○ ○ ○ ○ ○ ◎ ○ Example 8 ○ ○ ○ ○ ○ ◎ ○ Example 9 ○ ○ ○ ○ ○ ◎ ○ Example 10 ○ ◎ ○ ○ ○ ◎ ◎ Example 11 ○ ◎ ○ ○ ○ ◎ ◎ Example 12 ○ ◎ ○ ○ ○ ◎ ◎ Example 13 ○ ○ ○ ○ ○ ◎ ◎ Example 14 ○ ○ ○ ○ ○ ◎ ○ Example 15 ○ ○ ○ ○ ○ ◎ ○ Example 16 ○ ○ ○ ○ ○ ◎ ○ Example 17 ○ ○ ○ ○ ○ ◎ ○ Example 18 ○ ○ ○ ○ ○ ◎ ○ Example 19 ○ ◎ ○ ○ ○ ◎ ◎ Example 20 ○ ◎ ○ ○ ○ ◎ ◎ Example 21 ○ ◎ ○ ○ ○ ◎ ◎ Example 22 ○ ○ ○ ○ ○ ◎ ◎ Example 23 ○ ○ ○ ○ ○ ◎ ○ Example 24 ○ ○ ○ ○ ○ ◎ ○ Example 25 ○ ○ ○ ○ ○ ◎ ○ Example 26 ○ ○ ○ ○ ○ ◎ ○ Example 27 ○ ○ ○ ○ ○ ◎ ○ Example 28 ○ ◎ ○ ○ ○ ◎ ◎ Example 29 ○ ◎ ○ ○ ○ ◎ ◎ Example 30 ○ ◎ ○ ○ ○ ◎ ◎ Example 31 ○ ○ ○ ○ ○ ◎ ◎ Example 32 ○ ○ ○ ○ ○ ◎ ○ Example 33 ○ ○ ○ ○ ○ ◎ ○ Example 34 ○ ○ ○ ○ ○ ◎ ○ Example 35 ○ ○ ○ ○ ○ ◎ ○ Example 36 ○ ○ ○ ○ ○ ○ ○ Example 37 ○ ◎ ○ ○ ○ ○ ◎ Example 38 ○ ◎ ○ ○ ○ ○ ◎ Example 39 ○ ◎ ○ ○ ○ ○ ◎ Example 40 ○ ○ ○ ○ ○ ◎ ◎ Example 41 ○ ○ ○ ○ ○ ◎ ○ Example 42 ○ ○ ○ ○ ○ ◎ ○ Example 43 ○ ○ ○ ○ ○ ◎ ○ Example 44 ○ ○ ○ ○ ○ ◎ ○ Example 45 ○ ○ ○ ○ ○ ◎ ○ Example 46 ○ ◎ ○ ○ ○ ○ ◎ Example 47 ○ ◎ ○ ○ ○ ○ ◎ Example 48 ○ ◎ ○ ○ ○ ○ ◎ Example 49 ○ ○ ○ ○ ○ ○ ◎ Example 50 ○ ○ ○ ○ ○ ○ ○

[0137] [Table 16] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 51 ○ ○ ○ ○ ○ ○ ○ Example 52 ○ ○ ○ ○ ○ ○ ○ Example 53 ○ ○ ○ ○ ○ ○ ○ Example 54 ○ ○ ○ ○ ○ ○ ○ Example 55 ○ ◎ ○ ○ ○ ○ ◎ Example 56 ○ ◎ ○ ○ ○ ○ ◎ Example 57 ○ ◎ ○ ○ ○ ○ ◎ Example 58 ○ ○ ○ ○ ○ ○ ◎ Example 59 ○ ○ ○ ○ ○ ○ ○ Example 60 ○ ○ ○ ○ ○ ○ ○ Example 61 ○ ○ ○ ○ ○ ○ ○ Example 62 ○ ○ ○ ○ ○ ○ ○ Example 63 ○ ○ ○ ○ ○ ○ ○ Example 64 ○ ◎ ○ ○ ○ ○ ◎ Example 65 ○ ◎ ○ ○ ○ ○ ◎ Example 66 ○ ◎ ○ ○ ○ ○ ◎ Example 67 ○ ○ ○ ○ ○ ○ ◎ Example 68 ○ ○ ○ ○ ○ ○ ○ Example 69 ○ ○ ○ ○ ○ ○ ○ Example 70 ○ ○ ○ ○ ○ ○ ○ Example 71 ○ ○ ○ ○ ○ ○ ○ Example 72 ○ ○ ○ ○ ○ ○ ○ Example 73 ○ ◎ ○ ○ ○ ○ ◎ Example 74 ○ ◎ ○ ○ ○ ○ ◎ Example 75 ○ ◎ ○ ○ ○ ○ ◎ Example 76 ○ ○ ○ ○ ○ ○ ◎ Example 77 ○ ○ ○ ○ ○ ○ ○ Example 78 ○ ○ ○ ○ ○ ○ ○ Example 79 ○ ○ ○ ○ ○ ○ ○ Example 80 ○ ○ ○ ○ ○ ○ ○ Example 81 ○ ○ ○ ○ ○ ○ ○ Example 82 ○ ◎ ○ ○ ○ ○ ◎ Example 83 ○ ◎ ○ ○ ○ ○ ◎ Example 84 ○ ◎ ○ ○ ○ ○ ◎ Example 85 ○ ○ ○ ○ ○ ○ ◎ Example 86 ○ ○ ○ ○ ○ ○ ○ Example 87 ○ ○ ○ ○ ○ ○ ○ Example 88 ○ ○ ○ ○ ○ ○ ○ Example 89 ○ ○ ○ ○ ○ ○ ○ Example 90 ○ ○ ○ ○ ○ ○ ○ Example 91 ○ ◎ ○ ○ ○ ○ ◎ Example 92 ○ ◎ ○ ○ ○ ○ ◎ Example 93 ○ ◎ ○ ○ ○ ○ ◎ Example 94 ○ ○ ○ ○ ○ ○ ◎ Example 95 ○ ○ ○ ○ ○ ○ ○ Example 96 ○ ○ ○ ○ ○ ○ ○ Example 97 ○ ○ ○ ○ ○ ○ ○ Example 98 ○ ○ ○ ○ ○ ○ ○ Example 99 ○ ○ ○ ○ ○ ○ ○ Example 100 ○ ◎ ○ ○ ○ ○ ◎

[0138] [Table 17] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 101 ○ ◎ ○ ○ ○ ○ ◎ Example 102 ○ ◎ ○ ○ ○ ○ ◎ Example 103 ○ ○ ○ ○ ○ ○ ◎ Example 104 ○ ○ ○ ○ ○ ○ ○ Example 105 ○ ○ ○ ○ ○ ○ ○ Example 106 ○ ○ ○ ○ ○ ○ ○ Example 107 ○ ○ ○ ○ ○ ○ ○ Example 108 ○ ○ ○ ○ ○ ○ ○ Example 109 ○ ◎ ○ ○ ○ ○ ◎ Example 110 ○ ◎ ○ ○ ○ ○ ◎ Example 111 ○ ◎ ○ ○ ○ ○ ◎ Example 112 ○ ○ ○ ○ ○ ○ ◎ Example 113 ○ ○ ○ ○ ○ ○ ○ Example 114 ○ ○ ○ ○ ○ ○ ○ Example 115 ○ ○ ○ ○ ○ ○ ○ Example 116 ○ ○ ○ ○ ○ ○ ○ Example 117 ○ ○ ○ ○ ○ ○ ○ Example 118 ○ ◎ ○ ○ ○ ○ ◎ Example 119 ○ ◎ ○ ○ ○ ○ ◎ Example 120 ○ ◎ ○ ○ ○ ○ ◎ Example 121 ○ ○ ○ ○ ○ ○ ◎ Example 122 ○ ○ ○ ○ ○ ○ ○ Example 123 ○ ○ ○ ○ ○ ○ ○ Example 124 ○ ○ ○ ○ ○ ○ ○ Example 125 ○ ○ ○ ○ ○ ○ ○ Example 126 ○ ○ ○ ○ ○ ○ ○ Example 127 ○ ◎ ○ ○ ○ ○ ◎ Example 128 ○ ◎ ○ ○ ○ ○ ◎ Example 129 ○ ◎ ○ ○ ○ ○ ◎ Example 130 ○ ○ ○ ○ ○ ○ ◎ Example 131 ○ ○ ○ ○ ○ ○ ○ Example 132 ○ ○ ○ ○ ○ ○ ○ Example 133 ○ ○ ○ ○ ○ ○ ○ Example 134 ○ ○ ○ ○ ○ ○ ○ Example 135 ○ ○ ○ ○ ○ ○ ○ Example 136 ○ ◎ ○ ○ ○ ○ ◎ Example 137 ○ ◎ ○ ○ ○ ○ ◎ Example 138 ○ ◎ ○ ○ ○ ○ ◎ Example 139 ○ ○ ○ ○ ○ ○ ◎ Example 140 ○ ○ ○ ○ ○ ○ ○ Example 141 ○ ○ ○ ○ ○ ○ ○ Example 142 ○ ○ ○ ○ ○ ○ ○ Example 143 ○ ○ ○ ○ ○ ○ ○ Example 144 ○ ○ ○ ○ ○ ○ ○ Example 145 ○ ◎ ○ ○ ○ ○ ◎ Example 146 ○ ◎ ○ ○ ○ ○ ◎ Example 147 ○ ◎ ○ ○ ○ ○ ◎ Example 148 ○ ○ ○ ○ ○ ○ ◎ Example 149 ○ ○ ○ ○ ○ ○ ○ Example 150 ○ ○ ○ ○ ○ ○ ○

[0139] [Table 18] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 151 ○ ○ ○ ○ ○ ○ ○ Example 152 ○ ○ ○ ○ ○ ○ ○ Example 153 ○ ○ ○ ○ ○ ○ ○ Example 154 ○ ◎ ○ ○ ○ ○ ◎ Example 155 ○ ◎ ○ ○ ○ ○ ◎ Example 156 ○ ◎ ○ ○ ○ ○ ◎ Example 157 ○ ◎ ○ ○ ○ ○ ◎ Example 158 ○ ○ ○ ○ ○ ○ ○ Example 159 ○ ○ ○ ○ ○ ○ ○ Example 160 ○ ○ ○ ○ ○ ○ ○ Example 161 ○ ○ ○ ○ ○ ○ ○ Example 162 ○ ○ ○ ○ ○ ○ ○ Example 163 ○ ◎ ○ ○ ○ ○ ◎ Example 164 ○ ◎ ○ ○ ○ ○ ◎ Example 165 ○ ◎ ○ ○ ○ ○ ◎ Example 166 ○ ○ ○ ○ ○ ○ ◎ Example 167 ○ ○ ○ ○ ○ ○ ○ Example 168 ○ ○ ○ ○ ○ ○ ○ Example 169 ○ ○ ○ ○ ○ ○ ○ Example 170 ○ ○ ○ ○ ○ ○ ○ Example 171 ○ ○ ○ ○ ○ ○ ○ Example 182 ○ ○ ○ ○ ○ ◎ ◎ Example 183 ○ ○ ○ ○ ○ ◎ ◎ Example 184 ○ ○ ○ ○ ○ ◎ ◎ Example 185 ○ ○ ○ ◎ ○ ◎ ◎ Example 186 ○ ○ ○ ◎ ○ ◎ ◎ Example 187 ○ ○ ○ ◎ ○ ◎ ◎ Example 182 ○ ○ ○ ○ ○ ◎ ◎ Example 183 ○ ○ ○ ○ ○ ◎ ◎ Example 184 ○ ○ ○ ○ ○ ◎ ◎ Example 185 ○ ○ ○ ◎ ○ ◎ ◎ Example 186 ○ ○ ○ ◎ ○ ◎ ◎ Example 187 ○ ○ ○ ◎ ○ ◎ ◎ Example 182 ○ ○ ○ ◎ ○ ◎ ◎ Example 183 ○ ○ ○ ◎ ○ ◎ ◎ Example 184 ○ ○ ○ ◎ ○ ◎ ◎ Example 185 ○ ○ ○ ◎ ○ ◎ ◎ Example 186 ○ ○ ○ ◎ ○ ◎ ◎ Example 187 ○ ○ ○ ◎ ○ ◎ ◎ Example 188 ○ ○ ○ ○ ○ ◎ ◎ Example 189 ○ ○ ○ ◎ ○ ◎ ◎ Example 190 ○ ○ ○ ◎ ○ ◎ ◎ Example 191 ○ ○ ○ ◎ ○ ◎ ◎ Example 192 ○ ○ ○ ○ ○ ◎ ◎ Example 193 ○ ○ ○ ◎ ○ ◎ ◎ Example 194 ○ ○ ○ ◎ ○ ◎ ◎ Example 195 ○ ○ ○ ◎ ○ ◎ ◎ Example 196 ○ ○ ○ ○ ○ ◎ ◎ Example 197 ○ ○ ○ ○ ○ ◎ ◎ Example 198 ○ ○ ○ ○ ○ ◎ ◎ Example 199 ○ ○ ○ ○ ○ ◎ ◎ Example 200 ○ ○ ○ ○ ○ ◎ ◎ Example 201 ○ ○ ○ ○ ○ ◎ ◎ Example 202 ○ ○ ○ ○ ○ ◎ ◎

[0140] [Table 19] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 203 ○ ○ ○ ◎ ○ ◎ ◎ Example 204 ○ ○ ○ ◎ ○ ◎ ◎ Example 205 ○ ○ ○ ◎ ○ ◎ ◎ Example 206 ○ ○ ○ ◎ ○ ◎ ◎ Example 207 ○ ○ ○ ◎ ○ ◎ ◎ Example 208 ○ ○ ○ ◎ ○ ◎ ◎ Example 209 ○ ○ ○ ◎ ○ ◎ ◎ Example 210 ○ ○ ○ ◎ ○ ◎ ◎ Example 211 ○ ○ ○ ◎ ○ ◎ ◎ Example 212 ○ ○ ○ ◎ ○ ◎ ◎ Example 213 ○ ○ ○ ◎ ○ ◎ ◎ Example 214 ○ ○ ○ ◎ ○ ◎ ◎ Example 215 ○ ○ ○ ◎ ○ ◎ ◎ Example 216 ○ ○ ○ ◎ ○ ◎ ◎ Example 217 ○ ○ ○ ◎ ○ ◎ ◎ Example 218 ○ ○ ○ ◎ ○ ◎ ◎ Example 219 ○ ○ ○ ◎ ○ ◎ ◎ Example 220 ○ ○ ○ ◎ ○ ◎ ◎ Example 221 ○ ○ ○ ◎ ○ ◎ ◎ Example 222 ○ ○ ○ ◎ ○ ◎ ◎ Example 223 ○ ○ ○ ◎ ○ ◎ ◎ Example 224 ○ ○ ○ ◎ ○ ◎ ◎ Example 225 ○ ○ ○ ◎ ○ ◎ ◎ Example 226 ○ ◎ ○ ○ ○ ○ ◎ Example 227 ○ ◎ ○ ○ ○ ○ ◎ Example 228 ○ ◎ ○ ○ ○ ○ ◎ Example 229 ○ ◎ ○ ○ ○ ○ ◎ Example 230 ○ ◎ ○ ○ ○ ○ ◎ Example 231 ○ ◎ ○ ○ ○ ○ ◎ Example 232 ○ ◎ ○ ○ ○ ○ ◎ Example 233 ○ ◎ ○ ○ ○ ○ ◎ Example 234 ○ ◎ ○ ○ ○ ○ ◎ Example 235 ○ ◎ ○ ○ ○ ○ ◎ Example 236 ○ ◎ ○ ○ ○ ○ ◎ Example 237 ○ ◎ ○ ○ ○ ○ ◎ Example 238 ○ ◎ ○ ○ ○ ○ ◎ Example 239 ○ ◎ ○ ○ ○ ○ ◎ Example 240 ○ ◎ ○ ○ ○ ○ ◎ Example 241 ○ ○ ○ ○ ○ ◎ ◎ Example 242 ○ ○ ○ ○ ○ ◎ ◎ Example 243 ○ ○ ○ ○ ○ ◎ ◎ Example 244 ○ ○ ○ ○ ○ ◎ ○

[0141] [Table 20] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 245 ○ ○ ○ ◎ ○ ◎ ◎ Example 246 ○ ○ ○ ◎ ○ ◎ ◎ Example 247 ○ ○ ○ ◎ ○ ◎ ◎ Example 248 ○ ○ ○ ◎ ○ ◎ ◎ Example 249 ○ ○ ○ ◎ ○ ◎ ◎ Example 250 ○ ◎ ○ ◎ ○ ○ ◎ Example 251 ○ ◎ ○ ◎ ○ ○ ◎ Example 252 ○ ◎ ○ ◎ ○ ○ ◎ Example 253 ○ ◎ ○ ◎ ○ ○ ◎ Example 254 ○ ○ ○ ◎ ○ ◎ ◎ Example 255 ○ ○ ○ ◎ ○ ◎ ◎ Example 256 ○ ○ ○ ◎ ○ ◎ ◎ Example 257 ○ ○ ○ ◎ ○ ◎ ◎ Example 258 ○ ◎ ○ ◎ ○ ◎ ○ Example 259 ○ ◎ ○ ◎ ○ ◎ ○ Example 260 ○ ○ ○ ◎ ○ ○ ◎ Example 261 ○ ○ ○ ◎ ○ ○ ◎ Example 262 ○ ○ ○ ◎ ○ ○ ◎ Example 263 ○ ○ ○ ◎ ○ ○ ◎ Example 264 ○ ○ ○ ◎ ○ ○ ◎ Example 265 ○ ○ ○ ◎ ○ ○ ◎ Example 266 ○ ○ ○ ◎ ○ ○ ◎ Example 267 ○ ○ ○ ◎ ○ ○ ◎ Example 268 ○ ○ ○ ◎ ○ ○ ◎ Example 269 ○ ○ ○ ◎ ○ ○ ◎ Example 270 ○ ◎ ○ ◎ ○ ○ ◎ Example 271 ○ ◎ ○ ◎ ○ ○ ◎ Example 272 ○ ◎ ○ ◎ ○ ○ ◎ Example 273 ○ ◎ ○ ◎ ○ ○ ◎ Example 274 ○ ◎ ○ ◎ ○ ○ ◎ Example 275 ○ ◎ ○ ◎ ○ ○ ◎ Example 276 ○ ◎ ○ ◎ ○ ○ ◎ Example 277 ○ ○ ○ ◎ ○ ◎ ◎ Example 278 ○ ○ ○ ◎ ○ ◎ ◎ Example 279 ○ ○ ○ ◎ ○ ◎ ◎ Example 280 ○ ○ ○ ◎ ○ ◎ ◎ Example 281 ○ ○ ○ ◎ ○ ◎ ◎

[0142] [Table 21] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Example 282 ○ ○ ○ ◎ ○ ◎ ◎ Example 283 ○ ○ ○ ◎ ○ ◎ ◎ Example 284 ○ ○ ○ ◎ ○ ◎ ◎ Example 285 ○ ○ ○ ◎ ○ ◎ ◎ Example 286 ○ ○ ○ ◎ ○ ◎ ◎ Example 287 ○ ○ ○ ◎ ○ ◎ ◎ Example 288 ○ ○ ○ ◎ ○ ◎ ◎ Example 289 ○ ○ ○ ◎ ○ ◎ ◎ Example 290 ○ ○ ○ ◎ ○ ◎ ◎ Example 291 ○ ○ ○ ◎ ○ ◎ ◎ Example 292 ○ ○ ○ ◎ ○ ◎ ◎ Example 293 ○ ○ ○ ◎ ○ ◎ ◎ Example 294 ○ ○ ○ ◎ ○ ◎ ◎ Example 295 ○ ○ ○ ◎ ○ ◎ ◎ Example 296 ○ ○ ○ ◎ ○ ◎ ◎ Example 297 ○ ○ ○ ○ ○ ◎ ◎ Example 298 ○ ○ ○ ○ ○ ◎ ◎ Example 299 ○ ○ ○ ○ ○ ◎ ◎ Example 300 ○ ○ ○ ◎ ○ ○ ◎ Example 301 ○ ○ ○ ◎ ○ ○ ◎ Example 302 ○ ○ ○ ○ ○ ◎ ◎ Example 303 ○ ○ ○ ○ ○ ◎ ◎ Example 304 ○ ○ ○ ◎ ○ ◎ ◎ Example 305 ○ ○ ○ ◎ ○ ○ ◎ Example 306 ○ ○ ○ ◎ ○ ○ ◎ Example 307 ○ ○ ○ ◎ ○ ◎ ◎ Example 308 ○ ○ ○ ◎ ○ ○ ◎ Example 309 ○ ○ ○ ◎ ○ ○ ◎

[0143] [Table 22] Classification Sensitivity Refractive index transmittance Haze absolute viscosity Inkjet characteristics Flexible Comparative Example 1 ○ ○ ○ ○ ○ ◎ X Comparative Example 2 X Comparative Example 3 Initiator precipitation Reference Example 1 ○ ◎ ○ ○ ○ ◎ △ See Example 2 ○ ◎ ○ ○ ○ ◎ △ See Example 3 ○ ◎ ○ ○ ○ ◎ △ See Example 4 ○ ◎ ○ ○ ○ ◎ △ See Example 5 ○ ◎ ○ ○ ○ ◎ △ See Example 6 ○ ◎ ○ ○ ○ ◎ △ See Example 7 ○ ◎ ○ ○ ○ ○ △ See Example 8 ○ ◎ ○ ○ ○ ○ △ See Example 9 ○ ◎ ○ ○ ○ ○ △ See Example 10 ○ ◎ ○ ○ ○ ○ △ See Example 11 ○ ◎ ○ ○ ○ ○ △ See Example 12 ○ ◎ ○ ○ ○ ○ △ See Example 13 ○ ◎ ○ ○ ○ ○ △ See Example 14 ○ ◎ ○ ○ ○ ○ △ See Example 15 ○ ◎ ○ ○ ○ ○ △ See Example 16 ○ ◎ ○ ○ ○ ○ △ See Example 17 ○ ◎ ○ ○ ○ ○ △ See Example 18 ○ ◎ ○ ○ ○ ○ △ See Example 19 ○ ◎ ○ ○ ○ ○ △ See Example 20 ○ ○ X X X X ○ See Example 21 ○ ○ X X X X ○ See Example 22 ○ ○ X X X X ○ See Example 23 ○ ○ ○ ○ ○ X △ See Example 24 ○ ○ ○ X ○ ○ ○ See Example 25 ○ ○ ○ X ○ ○ ○ See Example 26 X ○ ○ X ○ ○ ○ See Example 27 ○ ○ ○ ○ X ◎ ○ See Example 28 ○ ○ ○ ○ X ◎ ○ See Example 29 ○ X ○ ○ X ◎ ○ See Example 30 ○ X ○ ○ X ◎ ○ See Example 31 ○ X ○ ○ X ◎ ○ See Example 32 ○ X ○ ○ X ◎ ○ See Example 33 ○ X ○ ○ X ◎ ○ See Example 34 ○ X ○ ○ X ◎ ○ See Example 35 ○ X ○ ○ X ◎ ○

[0144] From the results in Tables 15 to 22 above, Examples 1 to 309, with their optimal composition including a high-refractive-index monomer, a highly flexible monomer that prevents cracking, and a photoinitiator, exhibit higher refractive index, better viscosity, and lower haze compared to the comparative and reference examples. In particular, compared to the comparative and reference examples, these examples demonstrate superior flexibility, and exhibit excellent sensitivity, transmittance, heat resistance, and inkjet processability. When used as optical components in foldable or flexible display devices, they can help improve performance. Specifically, Comparative Example 1, without the use of a highly flexible monomer, failed to exhibit softness. Furthermore, due to insufficient or excessive photoinitiator content, the sensitivity of Comparative Examples 2 and 3 could not be measured, or initiator precipitation prevented the measurement of physical properties.

[0145] none

Claims

1. A photopolymerizable composition comprising: a) one or more high refractive index monomers having a liquid refractive index of 1.51 or higher before curing; b) one or more highly flexible monomers containing one or more photocurable functional groups, which can increase elongation by at least 5%; and c) a photopolymerization initiator, wherein the photopolymerizable composition further comprises 0.1 to 10 parts by weight of an amine enhancer, the amine enhancer comprising compounds selected from compounds of formula 11, ethyl dimethylaminobenzoate, butoxyethyl dimethylaminobenzoate, bis(diethylaminobenzoate) One or more of the group consisting of benzophenone, bis(2-hydroxyethyl)-toluidine, ethylhexyl (dimethylamino)benzoate, 2-(dimethylamino)ethyl (meth)acrylate, 2-(diisopropylamino)ethyl (meth)acrylate, 2-(acryloxy)ethyl 4-(dimethylamino)benzoate, 2-ethylhexyl 4-(dimethylamino)benzoate, ethyl 2-(dibutylamino)methacrylate and 4,4-(oxobis(ethane-2,1-diyl))bis(oxo)bis(dimethylaniline): [Chemical Formula 11] In the above Chemical Formula 11, R1 and R2 each independently represent an alkyl group having 1 to 5 carbon atoms, and R3 represents an alkyl group having 1 to 20 carbon atoms, an ether group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, an amino group or a (meth)acrylate group.

2. The photopolymerizable composition as described in claim 1, wherein, This high-refractive-index single-system is an aromatic or alicyclic photocurable compound containing one or more aromatic rings or one or more heteroatoms.

3. The photopolymerizable composition as described in claim 1, wherein, The high refractive index single system is an aromatic photocurable compound containing the structure of the following chemical formula 1: [Chemical Formula 1] B-Z1-Z2-R In the above chemical formula 1, B contains any one or more of the following structures: an aryl group having 6 to 30 carbon atoms, a 5- to 7-membered aliphatic heterocyclic structure with one or more sulfur (S) substituted, or a 5- to 7-membered aromatic heterocyclic structure with one or more sulfur (S) substituted; Z1 is a direct bond or an alkyl group having 1 to 10 carbon atoms; Z2 is a direct bond or an alkyl group having 1 to 10 carbon atoms containing one or more oxygen (O) or sulfur (S); and R is a photocurable functional group.

4. The photopolymerizable composition as described in claim 3, wherein, The high refractive index monomer comprises a structure of chemical formula 1, wherein the B group consists of aryl groups with 6 to 30 carbon atoms, the Z1 group consists of direct bonds, and the Z2 group consists of alkyl groups with 1 to 10 carbon atoms containing one or more oxygen (O) atoms.

5. The photopolymerizable composition as described in claim 4, wherein, This high-refractive-index monomer contains the structure of chemical formula 1, in which the B series consists of aryl groups with 6 to 30 carbon atoms, the Z1 series consists of direct bonds, and the Z2 series contains one or more oxygen (O) and aromatic ring structures.

6. The photopolymerizable composition as described in claim 3, wherein, The high refractive index monomer comprises a structure of chemical formula 1, wherein the B series comprises a 5-7 membered aromatic heterocyclic structure in which one or more sulfur (S) is substituted, the Z1 series comprises a direct bond, and the Z2 series comprises an alkyl group containing one or more sulfur (S) and having 1 to 10 carbon atoms.

7. The photopolymerizable composition as described in claim 1, wherein, The high refractive index monomer comprises one or more selected from the group consisting of benzyl (meth)acrylate, phenoxyethyl (meth)acrylate, phenoxybenzyl (meth)acrylate, o-phenylphenoxyethyl (meth)acrylate, biphenyl ethyl (meth)acrylate, and chemical formulas 2 to 8: [Chemical Formula 2] [Chemical Formula 3] [Chemical Formula 4] [Chemical Formula 5] [Chemical Formula 6] [Chemical Formula 7] [Chemical Formula 8] In the above chemical formulas 2 to 8, R is independently H or CH3.

8. The photopolymerizable composition as described in claim 1, wherein, The highly flexible monomer comprises the structure of the following chemical formula 9: [Chemical Formula 9] (A)mB-(A')n. In the above chemical formula 9, A and A' can be the same or different as photocurable functional groups. B is an aliphatic structure with 6 to 50 carbon atoms, containing or not containing one or more oxygen atoms, and at least contains a straight-chain alkyl structure with 6 or more carbon atoms. m and n are integers of 0 or 1 and are not both 0.

9. The photopolymerizable composition as described in claim 8, wherein, This highly flexible single-component system has a structure of chemical formula 9 containing 4 to 20 oxygen atoms.

10. The photopolymerizable composition as described in claim 1, wherein, The highly flexible monomer comprises one or more selected from the group consisting of isodecyl methacrylate, lauryl methacrylate, stearyl methacrylate, ethoxyethyl methacrylate, ethoxyethyl methacrylate, triethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate and the following chemical formula 10, [chemical formula 10] in the above chemical formula 10, a+b = 0 ~ 10, where a and b are integers.

11. The photopolymerizable composition as described in claim 10, wherein, In the above chemical formula 10, a and b are each integers from 1 to 5.

12. The photopolymerizable composition as described in claim 1, wherein, Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the high-flexibility monomer comprises 10 to 90 parts by weight.

13. The photopolymerizable composition as described in claim 1, wherein, Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the high-flexibility monomer comprises 10 to 40 parts by weight.

14. The photopolymerizable composition as described in claim 1, wherein, Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerizable composition contains 0.5 to 30 parts by weight of a photopolymerization initiator.

15. The photopolymerizable composition as described in claim 1, wherein, The absolute viscosity (measured at 25°C) of the photopolymerizable composition ranges from 5 cP to 40 cP.

16. The photopolymerizable composition as described in claim 1, wherein, Based on a total of 100 parts by weight of the high-refractive-index monomer and the high-flexibility monomer, the photopolymerizable composition also contains 0.1 to 10 parts by weight of a photosensitizer.

17. The photopolymerizable composition as described in claim 16, wherein, The photosensitizer is selected from one or more of the group consisting of isopropylthioxanthone, pyrene, perylene, terphenyl, anthracene, 9,10-dibutoxyanthracene, 9,10-diethoxyanthracene, 3,7-dimethoxyanthracene, and 9,10-dipropoxyanthracene.

18. An optical component comprising: a substrate; and a hardened film comprising a hardened form of a highly flexible photopolymerizable composition for inkjet printing as described in any one of claims 1 to 17.

19. The optical component as described in claim 18, wherein, The hardened film has a haze of less than 3%, a refractive index of more than 1.58, and an elongation of more than 5%.

20. A display device comprising at least one of the optical components as described in claim 18 as an optical film or a patterned film.