Brightness-enhancing film coating and its applications

Abstract

A brightness enhancement film coating material and its application, the raw materials for the coating material, calculated by parts by weight, include at least 20-76 parts of monofunctional photocurable monomer, 20-76 parts of bifunctional photocurable monomer, 1-10 parts of photoinitiator, and 0-4 parts of auxiliary. The brightness enhancement film formed with the coating material does not generate white stripes after high temperature and high humidity reliability test, and has improved compatibility with polarizing plates. At the same time, the reliability test can reflect the long-term usage situation to a certain extent, and the excellent reliability test result can guarantee the stability of the display panel for long-term use, and avoid the debris generated during cutting from contaminating the film and thereby affecting the usage effect.

Description

[Technical Field]

[0001] This application relates to the technical field of display materials, specifically to brightness enhancing film coatings and their applications. [Background technology]

[0002] A TFT-LCD backlight module consists of a light source, a light guide plate, a diffusion film, a brightness enhancement film, and a reflective film, and its main function is to provide a uniform surface light source for the LCD panel. Brightness enhancement film, a key component of the backlight module, is an optical film with a precise microstructure that can concentrate light from different radiation directions toward the front, thereby improving the brightness of the LCD display panel. However, conventional brightness enhancement films lack the polarizing and reflective function, resulting in half of the polarized light reflected by the polarizing film below the LCD being wasted. Therefore, the use of a polarizing and reflective composite brightness enhancement film can significantly improve the brightness of the LCD module.

[0003] Most brightness enhancement films currently on the market, when combined with PMMA polarizers, undergo high-temperature and high-humidity reliability tests (which can reflect long-term usage conditions to some extent), resulting in the appearance of white stripes that affect the display screen. Furthermore, the film is prone to generating debris around its edges during cutting, molding, and subsequent transport and assembly, resulting in scratches on the edges. Furthermore, any debris that falls off can spill over the entire film, affecting its effectiveness.

[0004] To solve the above technical problems, the present application provides a brightness enhancement film coating material, and the brightness enhancement film formed using the coating material of the present application does not develop white streaks after high temperature and high humidity reliability testing and has improved compatibility with polarizing plates. Summary of the Invention

[0005] To solve the above technical problems, a first aspect of the present application provides a brightness enhancing film coating material, the raw materials for producing the coating material comprising, calculated in parts by weight, at least 20 to 76 parts of a monofunctional photocurable monomer, 20 to 76 parts of a bifunctional photocurable monomer, 1 to 10 parts of a photoinitiator, and 0 to 4 parts of an auxiliary agent.

[0006] In one preferred technical solution of the present application, the refractive index of the monofunctional photocurable monomer is 1.5 or more.

[0007] In one preferred technical solution of the present application, the fluid viscosity of the monofunctional photocurable monomer is 200 cps or less.

[0008] In one preferred technical solution of the present application, the terminal group of the monofunctional photocurable monomer is one selected from a methacryloxy group, an acryloyloxy group, a vinyl group, and an allyl group.

[0009] In one preferred technical solution of the present application, the structure of the bifunctional photocurable monomer is as shown in Formula 1, in which R and R' are each one selected from a methacryloxy group, an acryloyloxy group, a vinyl group, and an allyl group, R1 and R2 are each one selected from a hydrogen atom, an alkyl group, and an alkoxy group, and m and n are natural numbers. [ka]

[0010] In one preferred technical solution of the present application, the bifunctional photocurable monomer is BPA(EO). m+n DA and / or BPA(EO) m+n DMA and the BPA(EO) m+n The structure of DA is as shown in Formula 2, and the BPA(EO) m+n The structure of DMA is shown in Formula 3, and the BPA(EO) m+n DA is ethoxy-modified bisphenol A diacrylate, and the BPA(EO) m+nDMA is ethoxy-modified bisphenol A dimethacrylate. [ka] [ka]

[0011] In one preferred technical solution of the present application, 2≦m+n≦40.

[0012] As one preferred technical solution of the present application, <m+n≦40である。

[0013] In one preferred technical solution of the present application, 7≦m+n≦10.

[0014] In one preferred technical solution of the present application, 2≦m+n≦6.

[0015] In one preferred technical solution of the present application, the auxiliary agent includes at least a slip agent.

[0016] In one preferred technical solution of the present application, the slip agent is a polyether-modified silicone compound.

[0017] The second aspect of the present application provides the application of the brightness enhancement film paint in an LED display module. [Effects of the Invention]

[0018] The present invention provides a brightness enhancement film coating material, and the brightness enhancement film formed by the coating material does not exhibit white streaks after high temperature and high humidity reliability testing, and has improved compatibility with polarizers. At the same time, the reliability test can reflect the long-term usage conditions to some extent, and excellent reliability test results can ensure the long-term stability of the display panel, and prevent debris generated during cutting from contaminating the film and thereby affecting its usage effectiveness. DETAILED DESCRIPTION OF THE INVENTION

[0019] The contents of the present application can be more readily understood by reference to the following detailed description of the preferred embodiments of the present application and the included examples. Unless limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In case of conflict, the definitions herein shall control.

[0020] As used herein, the term "manufactured by" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to be non-exclusive inclusions. For example, a composition, step, method, product, or device that comprises listed elements may include not only those elements, but also other elements or elements inherent in those compositions, steps, methods, products, or devices that are not expressly listed.

[0021] The conjunction "consisting of" excludes any unspecified element, step, or composition. When used in a claim, this phrase means that the claim is closed and does not include any materials other than those recited, except for related common impurities. When the phrase "consisting of" is placed within a clause within the claim subject matter rather than immediately following the claim subject matter, it limits the elements recited in that clause and does not exclude other elements from the claim as a whole.

[0022] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, it is to be understood that all ranges comprising any combination of said values, whether or not each range consisting of the upper or preferred value of any range and the lower or preferred value of any range, are specifically disclosed. For example, if a range of "1 to 5" is disclosed, the described range is interpreted to include "1 to 4," "1 to 3," "1 to 2," "1 to 2 and 4 to 5," and "1 to 3 and 5." Numerical ranges described herein are intended to include their endpoints, and all integers and fractions within the range, unless otherwise specified.

[0023] Unless the context clearly dictates otherwise, the singular forms include plural referents. "Optional" or "any one" means that the subsequently described item or event may or may not occur, and the description includes situations in which the event occurred and situations in which the event did not occur.

[0024] In this specification and claims, approximating terms are used to modify a quantity, and the application is not limited to that specific quantity, but also includes modifications close to the permissible quantity without resulting in a change in the related base function. Thus, the use of "approximately," "about," or the like to modify a numerical value means that the application is not limited to the exact numerical value. In some instances, approximating terms may correspond to the precision of an instrument for measuring a value. In this specification and claims, range limitations can be combined and / or interchanged, and unless otherwise stated, these ranges include all subranges encompassed by them.

[0025] In order to solve the above technical problems, a first aspect of the present application provides a brightness enhancement film coating material, the raw materials for producing the coating material comprising, calculated in parts by weight, at least 20 to 76 parts of a monofunctional photocurable monomer, 20 to 76 parts of a bifunctional photocurable monomer, 1 to 10 parts of a photoinitiator, and 0 to 4 parts of an auxiliary agent.

[0026] In a more preferred embodiment, the total weight parts of the monofunctional photocurable monomer and the difunctional photocurable monomer in the raw materials for producing the coating material is 70 to 98 parts.

[0027] Monofunctional photocurable monomers In the present application, the number of parts by weight of the coating material of the monofunctional photocurable monomer in the manufacturing raw materials is 20 to 76 parts.

[0028] In one preferred embodiment, the coating material of the monofunctional photocurable monomer accounts for 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, Examples of the amino acid sequence include 44 parts, 45 parts, 46 parts, 47 parts, 48 ​​parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, and the like.

[0029] In a more preferred embodiment, the number of parts by weight of the coating material of the monofunctional photocurable monomer in the production raw materials is 25 to 70 parts.

[0030] In the present application, the refractive index of the monofunctional photocurable monomer is 1.5 or more.

[0031] In one preferred embodiment, the refractive index of the monofunctional photocurable monomer is greater than 1.5.

[0032] The refractive index is the ratio of the propagation speed of light in a vacuum to the propagation speed of light in the medium. The higher the refractive index of a material, the greater its ability to refract incident light. The higher the refractive index, the thinner the lens; that is, for the same central thickness, same power, and same material, the edge of a lens with a higher refractive index will be thinner than the edge of a lens with a lower refractive index. The refractive index is closely related to the electromagnetic properties of a medium. According to classical electromagnetic theory, εr and μr are the relative permittivity and relative permeability of a medium, respectively. The refractive index is further related to frequency, which is called the dispersion phenomenon. When light enters an optically sparse medium from a relatively optically dense medium and the angle of incidence is greater than the critical angle, it can undergo total internal reflection.

[0033] In the present application, the fluid viscosity of the monofunctional photocurable monomer is 200 cps or less.

[0034] In one preferred embodiment, the fluid viscosity of the monofunctional photocurable monomer is less than 200 cps.

[0035] In the present application, the terminal group of the monofunctional photocurable monomer is one selected from a methacryloxy group, an acryloyloxy group, a vinyl group, and an allyl group.

[0036] In one preferred embodiment, the structure of the monofunctional photocurable monomer includes at least one of a benzene ring, an acrylate including an N,O-heterocyclic structure, and a methacrylate including an N,O-heterocyclic structure.

[0037] In one preferred embodiment of the present application, the monofunctional photocurable monomer is at least one selected from the group consisting of a monomer having a refractive index higher than 1.5, a monomer having a fluid viscosity lower than 200 cps, and a monomer that adheres well to a PET substrate.

[0038] Regarding the monomers that adhere well to the PET substrate, the test method is a cross-cut method, and there is no specific standard. Instead, by observing the compounding components in the experiment, the effect of improving adhesion can be achieved by adding the corresponding components.

[0039] In the present application, the monomer having a refractive index higher than 1.5 is at least one selected from o-phenylphenoxyethyl acrylate, (2-ethoxy)o-phenylphenoxyethyl acrylate, biphenylcarbinol acrylate, phenoxybenzyl acrylate, m-phenoxybenzene methacrylate, and 2-(p-cumenyl-phenoxy)-ethyl acrylate.

[0040] In one preferred embodiment, the o-phenylphenoxyethyl acrylate is not particularly limited and may include o-phenylphenol epoxy acrylate (OPPEA), and the origin of the o-phenylphenol epoxy acrylate is not particularly limited and may include Zhide Chemical PP011, Meiyuan M1142, Noida N112, Changxing EM2105, etc.

[0041] In one preferred embodiment, the origin of the (2-ethoxy)o-phenylphenoxyethyl acrylate (OPP(EO)2A) is not particularly limited, and may include Noida N122.

[0042] In one preferred embodiment, the origin of the biphenylcarbinol acrylate (BPMA) is not particularly limited, and examples thereof include LuCure 646.

[0043] In one preferred embodiment, the origin of the phenoxybenzyl acrylate (PBA) is not particularly limited, and examples thereof include LuCure.

[0044] In one preferred embodiment, the origin of the m-phenoxybenzene methacrylate (MPOBA) is not particularly limited, and examples thereof include Changxing EM2050.

[0045] In one preferred embodiment, the origin of the 2-(p-cumenyl-phenoxy)-ethyl acrylate (CPEA) is not particularly limited, and examples thereof include Changxing EM2107.

[0046] In a more preferred embodiment, the monomer having a refractive index greater than 1.5 is at least one selected from OPPEA, OPP(EO)2A, BPMA, PBA, and MPOBA to increase the refractive index of the compounded cured film and further improve the brightness of the film.

[0047] In the present application, the monomer having a fluid viscosity of less than 200 cps is at least one selected from benzyl acrylate, biphenyl carbinol acrylate, 2-phenoxyethyl acrylate, (2-ethoxy)phenoxy acrylate, (3-ethoxy)phenoxy acrylate, acryloylmorpholine, 2-phenoxyethyl methacrylate, and m-phenoxybenzene methacrylate.

[0048] In one preferred embodiment, the source of the benzyl acrylate (PBA) is not particularly limited, and examples thereof include LuCure.

[0049] In one preferred embodiment, the origin of the biphenylcarbinol acrylate (BPMA) is not particularly limited, and examples thereof include LuCure 646.

[0050] In one preferred embodiment, the source of the 2-phenoxyethyl acrylate (PHEA) is not particularly limited, and examples thereof include Changxing EM210, Sartomer SR339, and the like.

[0051] In one preferred embodiment, the origin of the (2-ethoxy)phenoxy acrylate (PH(EO)2A) is not particularly limited, and examples thereof include Changxing EM2101.

[0052] In one preferred embodiment, the origin of the (3-ethoxy)phenoxy acrylate (PH(EO)3A) is not particularly limited, and examples thereof include Changxing EM2103.

[0053] In one preferred embodiment, the origin of the acryloylmorpholine (ACMO) is not particularly limited, and examples thereof include LuCure248.

[0054] In one preferred embodiment, the origin of the m-phenoxybenzene methacrylate (MPOBA) is not particularly limited, and examples thereof include Changxing EM2050.

[0055] In a more preferred embodiment, in order to adjust the viscosity of the system to obtain better flowability and ease of application, the monomer having a fluid viscosity of less than 200 cps is at least one selected from PBA, BPMA, PHEA, PH(EO)2A, and ACMO.

[0056] In the present application, the monomer that adheres well to the PET substrate is at least one selected from the group consisting of o-phenylphenoxyethyl acrylate, m-phenoxybenzene methacrylate, 2-(p-cumenyl-phenoxy)-ethyl acrylate, and benzyl acrylate.

[0057] In one preferred embodiment, the origin of the o-phenylphenoxyethyl acrylate (OPPEA) is not particularly limited, and examples thereof include Zhide Chemical PP011, Meiyuan M1142, Noida N112, and Changxing EM2105.

[0058] In one preferred embodiment, the origin of the m-phenoxybenzene methacrylate (MPOBA) is not particularly limited, and examples thereof include Changxing EM2050.

[0059] In one preferred embodiment, the origin of the 2-(p-cumenyl-phenoxy)-ethyl acrylate (CPEA) is not particularly limited, and examples thereof include Changxing EM2107.

[0060] In one preferred embodiment, the origin of the benzyl acrylate (BA) is not particularly limited, and examples thereof include Changxing EM75.

[0061] In one more preferred embodiment, in order to improve the problem of chipping, the monomer that adheres well to the PET substrate is at least one selected from OPPEA, OPP(EO)2A, MPOBA, and CPEA.

[0062] Bifunctional photocurable monomer In the present application, the number of parts by weight of the bifunctional photocurable monomer in the raw materials for producing the coating material is 20 to 76 parts.

[0063] In one preferred embodiment, the number of parts by weight of the bifunctional photocurable monomer in the raw materials for producing the coating material is 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, Examples of the amino acid sequence include 44 parts, 45 parts, 46 parts, 47 parts, 48 ​​parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, and the like.

[0064] In a more preferred embodiment, the number of parts by weight of the bifunctional photocurable monomer in the raw materials for producing the coating material is 25 to 70 parts.

[0065] In the present application, the structure of the bifunctional photocurable monomer is as shown in Formula 1 (wherein R and R' each represent one selected from a methacryloxy group, a vinyl group, and an allyl group, R1 and R2 each represent one selected from a hydrogen atom, an alkyl group, and an alkoxy group, and m and n each represent a natural number). [ka]

[0066] In one preferred embodiment, the difunctional photocurable monomer is BPA(EO). m+n DA and / or BPA(EO)m+n DMA and the BPA(EO) m+n The structure of DA is as shown in Formula 2, and the BPA(EO) m+n The structure of DMA is shown in Formula 3. [ka] [ka]

[0067] In the present application, 2≦m+n≦40.

[0068] The applicant has discovered that when m+n is 2≦m+n≦40, this type of monomer has adjustable ethoxy chain segments. As the ethoxy chain shortens (e.g., 2≦m+n≦6), this type of monomer exhibits the characteristics of fast reaction speed and high hardness, improving the system's degree of cure and reducing flaking. As the ethoxy chain lengthens (e.g., 7≦m+n≦40), this type of monomer exhibits excellent flexibility and provides the system with excellent self-healing performance. Meanwhile, the greater the number of ethoxy chain segments, the higher the self-healing ability but the lower the refractive index. Therefore, to achieve the desired refractive index, a bifunctional photocurable monomer with a long ethoxy chain should be combined with a monofunctional photocurable monomer with a high refractive index, such as OPPEA or CPEA. A monomer with a short ethoxy chain can be combined with a monofunctional photocurable monomer such as PH(EO)2A, PHEA, or tetrahydrofurfuryl acrylate (THFA) to reduce hardness. In this application, bifunctional photocurable monomers with short ethoxy chains have a fast reaction rate and a high degree of system reaction, so that the coatings produced therefrom have excellent reliability test performance. Bifunctional photocurable monomers with long ethoxy chains have a slow reaction rate, so they should be combined with monofunctional photocurable monomers with a fast reaction rate, which will improve the degree of system cure and the reliability test performance of the coatings produced therefrom.

[0069] In one preferred embodiment, 10 < m + n ≤ 40. Since the repeating chain of ethoxy in such monomers is long, excellent flexibility and self-healing properties can be provided. However, during the examination process, the applicant found that the addition amount of such monomers should not be too much. Generally, it is 20 parts by weight or less. When the addition amount exceeds 20 parts by weight, it will seriously affect the refractive index of the paint produced thereby, and it is difficult to balance even when adding more other high-refractive-index monomers. Therefore, it is difficult to achieve the requirement of improving the brightness of the brightness improvement film, and the adhesion and crosslinking density are also affected. Furthermore, it was found that it affects the improvement of chip and reliability test problems.

[0070] In one preferred embodiment, 7 ≤ m + n ≤ 10. The repeating chain of ethoxy in such monomers is appropriate. It not only has high flexibility but also does not significantly reduce the refractive index. By combining with short-chain (2 ≤ m + n ≤ 6) and long-chain (m + n > 10) monomers, the performance of flexibility and refractive index can be well balanced, and monomers with different chain lengths can obtain an appropriate crosslinking density after curing. The preferred range of the addition amount of such monomers is 0 to 40 parts by weight. When adding such monomers, the short-chain monomers to be combined are preferably 15 to 40 parts by weight, and the long-chain monomers are preferably 5 to 15 parts by weight.

[0071] In one preferred embodiment, 2 ≤ m + n ≤ 6. The repeating chain of ethoxy in such monomers is small. Preferably, in combination with at least 10 parts by weight of long-chain monomers (m + n > 10) or at least 30 parts by weight of monomers (m + n ≥ 7) and other monomers, better flexibility can be achieved.

[0072] Photoinitiator In the present application, the number of parts by weight of the auxiliary agent in the raw materials for manufacturing the paint is 1 to 10 parts.

[0073] In a preferred embodiment, the number of parts by weight of the monofunctional photocurable monomer in the raw materials for producing the paint may be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, etc.

[0074] In one more preferred embodiment, the number of parts by weight of the auxiliary agent in the raw materials for producing the paint is 1 to 4 parts.

[0075] In the present application, the photoinitiator is not particularly limited and is well known to those skilled in the art.

[0076] In one preferred embodiment, the photoinitiator is an α-hydroxyalkyl ketone photoinitiator and / or an acyloxide photoinitiator.

[0077] In one more preferred embodiment, the photoinitiator is at least one selected from Photoinitiator 184, Photoinitiator TPO, Photoinitiator 1173.

[0078] During the course of experiments, the applicant discovered that when the photoinitiator in the main body system includes at least the photoinitiator TPO and is combined with at least one of the photoinitiators 184 and 1173, the coating can be cured more thoroughly and reach an ideal degree of cure.

[0079] auxiliary agent In the present application, the number of parts by weight of the auxiliary agent in the raw materials for producing the paint is 0 to 4 parts.

[0080] In a preferred embodiment, the weight ratio of the auxiliary agent to the raw materials for producing the paint is 0 parts, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2.0 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3.0 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4.0 parts, etc.

[0081] In a more preferred embodiment, the number of parts by weight of the auxiliary agent in the raw materials for producing the paint is 0 to 1 part.

[0082] In the present application, the auxiliary agent includes at least a slip agent.

[0083] In one preferred embodiment, the slip agent is a polyether modified silicone compound.

[0084] In a more preferred embodiment, the supply source of the polyether-modified silicone compound is not particularly limited, and may be obtained by self-production or by purchase. Examples of the polyether-modified silicone compound available from suppliers include BYK-333, BYK-3505, BYK3500, BYK3510, SF-761C, TEGO450, and TEGO410. The structure of the polyether-modified silicone compound is as follows: [ka] [ka] [ka] and R 10 , R 20 is H or a methyl group, p is an integer between 3 and 50, q is an integer within the range of 10 to 100, and R 30The structure of [ka] wherein x and y are any integers within the range of 1 to 15, and R 50 is hydrogen or [ka] wherein r and s are any integers within the range of 0 to 100, and the sum of r and s is 100; 40 The structure of [ka] is.

[0085] During the course of research, the applicant discovered that because the silicone auxiliary always migrates to the surface after curing, it is likely that the auxiliary itself will precipitate on the film surface after high temperature and high humidity reliability testing, or that white stripes will appear after combining with a polarizer, affecting the screen. Therefore, by selecting a reactive auxiliary for the main body system, the effects of auxiliary migration can be reduced, and by using a non-reactive auxiliary, the effects of auxiliary migration can be reduced by improving the reaction rate or crosslinking degree of the system.

[0086] A second aspect of the present application provides a method for producing the brightness enhancement film coating, which includes the step of mixing a monofunctional photocurable monomer, a difunctional photocurable monomer, a photoinitiator, and an auxiliary agent, and then stirring the mixture to obtain a uniform coating.

[0087] In one preferred embodiment, the stirring speed and time need only satisfy the requirement for uniform mixing, and in the production of the paint according to the present application, the stirring speed is preferably 500 rpm or more, more preferably 500 to 2000 rpm, and the stirring time is preferably 30 minutes or more, more preferably 30 to 120 minutes. In the production of the paint according to the present application, after the raw materials are uniformly mixed, solid particle impurities are filtered out using a filter bag.

[0088] The present application will be specifically described by the following examples. It should be understood that the following examples are merely for further explanation of the present application and do not limit the scope of protection of the present application. Based on the above content of the present application, non-essential improvements and adjustments made by those skilled in the art will still fall within the scope of protection of the present application.

[0089] Unless otherwise specified, all raw materials used are commercially available. Example

[0090] The present application will be described in more detail below with reference to examples, but the embodiments of the present application are not limited thereto.

[0091] The components used in the examples and comparative examples, their amounts (calculated in parts by weight), and performance test results are shown in Tables 1 to 3. In the examples, OPPEA was Jangheung EM2105, PHEA was Jangheung EM210, MPBOA was Jangheung EM2050, BPA(EO)4DA was Jangheung EM2261, and BPA(EO) 10 DA is Changxing EM2265, BPA(EO) 20 DA is Changxing EM2269, photoinitiator 184 is Changxing PI184, photoinitiator 1173 is Changxing PI1173, photoinitiator TPO is Changxing PITPO, and ACMO is Runao LuCure248.

[0092] Performance Test 1. Adhesion is measured using the cross-cut method at 23±2°C. The adhesion is ranked 5B, 4B, 3B, 2B, and B in descending order of best to worst.

[0093] 2. Regarding the amount of debris caused by cutting, after cutting the brightness enhancement film with a cutter, rub the edge of the brightness enhancement film with your hand while wearing butyronitrile gloves at 25°C and observe the amount of coating layer that has fallen off.

[0094] 3. Reliability test: After assembling the brightness enhancement film with other components such as a polarizer, leave it at 85℃ and 85%RH for 240 hours, and then observe whether there are any abnormalities on the surface. After the test, if no defects occur on the screen, it is rated as excellent, if defects occur in a small area, it is rated as good, and if defects occur in a large area, it is rated as poor.

[0095] [Table 1]

[0096] In comparison with Comparative Examples 1 and 2, Examples 1 to 6 can obtain higher reliability results and reduce chipping when the monofunctional photocurable monomer and bifunctional photocurable monomer are in the above range.

[0097] [Table 2]

[0098] In Examples 7 and 8, the photoinitiator TPO was increased to improve the reaction degree of the system, allowing the small molecule monomers in the system to react more thoroughly, resulting in better reliability results, compared to Comparative Example 3. In Comparative Example 4, the excess initiator reduced the chain length and cure degree of the cured polymer, resulting in increased chipping and poor reliability test results.

[0099] [Table 3]

[0100] Example 9 shows higher reliability results than Comparative Example 6 because the use of the reactive auxiliary BYK3505, which can participate in the UV reaction (TEGO450 cannot participate in the UV reaction), reduces the migration of the auxiliary into the coating layer after the reaction.

[0101] The foregoing examples are merely illustrative and are used to describe the features of the method of the present application. The appended claims are intended to claim the broadest possible scope, and the examples presented herein are merely descriptions of selected embodiments, according to all possible example combinations. Therefore, the applicants do not intend the appended claims to be limited by the examples selected to describe the features of the present application. Any numerical ranges used in the claims also include subranges encompassed thereby, and modifications of these ranges should be construed as being covered by the appended claims, to the extent possible. [Industrial Applicability]

[0102] The brightness enhancing film coating of the present invention can be applied to the technical field of display materials.

Claims

1. A brightness enhancing film paint, the manufacturing raw materials of which include, calculated by weight parts, at least 20 to 76 parts of a monofunctional photocurable monomer, 20 to 76 parts of a difunctional photocurable monomer, 1 to 10 parts of a photoinitiator, and 0 to 4 parts of an auxiliary; the monofunctional photocurable monomer includes a monofunctional photocurable monomer having a refractive index of 1.5 or more, and includes at least three types of monofunctional monomers selected from an acrylate having a benzene ring, an acrylate having an N,O-heterocyclic structure, and a methacrylate having an N,O-heterocyclic structure; The difunctional photocurable monomer is BPA(EO). ｍ＋ｎ DA and / or BPA(EO) ｍ＋ｎ DMA, and the BPA(EO) ｍ＋ｎ The structure of DA is as shown in Formula 2, and the BPA(EO) ｍ＋ｎ The structure of DMA is as shown in Formula 3, and 【Chemistry 1】 【Chemistry 2】 The bifunctional photocurable monomer contains, relative to 99.5 parts by mass of the brightness improving film coating material, 6 to 20 parts by mass of a bifunctional monomer satisfying 10<m+n≦40, 0 to 30 parts by mass of a bifunctional monomer satisfying 7≦m+n≦10, and 0 to 37 parts by mass of a bifunctional monomer satisfying 2≦m+n≦6 (where m+n is the sum of BPA(EO) ｍ＋ｎ DA and / or BPA(EO) ｍ＋ｎ DMA numbers.) Brightness enhancing film paint.

2. 10. The brightness enhancing film coating of claim 1, wherein the monofunctional photocurable monomer has a fluid viscosity of 200 cps or less.

3. The brightness enhancing film coating material according to claim 1 , wherein the terminal group of the monofunctional photocurable monomer is one selected from the group consisting of a methacryloxy group, an acryloyloxy group, a vinyl group, and an allyl group.

4. The brightness enhancing film coating of claim 1 , wherein the auxiliary agent comprises at least a slip agent.

5. The brightness enhancing film coating of claim 4, wherein the slip agent is a polyether modified silicone compound.

6. The application of the brightness enhancement film coating of any one of claims 1 to 4 in LED display module.

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