Composition, functional layer, and display module

Abstract

The present application provides a composition, a functional layer, and a display module, the composition comprising, by mass, 50-70 parts of a (meth)acrylic acid-based compound, 30-50 parts of an additive, 30-50 parts of an active diluent, and 0-10 parts of an auxiliary, the additive including a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer. The composition has a low dielectric constant and therefore functions as a medium that effectively shields static electricity, thereby overcoming defects caused by static electricity.

Description

Technical Field

[0005] ,

[0001] This application relates to a composition, a functional layer, and a display module, and belongs to the field of display technology.

Background Art

[0002] With the development of display technology, higher requirements are imposed on each performance of display devices. Among them, flexible display screens can be bent freely, so they have excellent visual enjoyment when unfolded and have the advantages of being portable and small in volume when stored. Therefore, they have gradually become the main trend in the development of electronic products.

[0003] However, during use, the accumulation of static electricity and its discharge process will damage the display screen to varying degrees, seriously affecting the normal display function of the display screen. In particular, it will cause the green screen phenomenon of the display screen due to static electricity.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application provides a composition, a functional layer, and a display module that can overcome defects caused by static electricity. [[ID=2,8]]

Means for Solving the Problems

[0005] This application is a composition containing 50 to 70 parts of a (meth)acrylic acid-based compound, 30 to 50 parts of an additive, 30 to 50 parts of an active diluent, and 0 to 10 parts of an auxiliary agent by parts by mass, The (meth)acrylic acid-based compound is (meth)acrylic acid, polyurethane (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, and epoxy (meth)acrylate It is at least one species selected from a larger group. 、 The additive is a polystyrene-polyisoprene-polystyrene block copolymer. 、 Derivatives of polystyrene-polyisoprene-polystyrene block copolymer, polyethylene-polyisoprene-polyethylene block copolymer 、 Derivatives of polyethylene-polyisoprene-polyethylene block copolymer, polypropylene-polyisoprene-polyethylene block copolymer , and Derivatives of polypropylene-polyisoprene-polyethylene block copolymers It is at least one species selected from a larger group. , The aforementioned active diluent is a (meth)acrylic acid ester compound. and The (meth)acrylic acid ester compounds include ethyl (meth)acrylate, butyl (meth)acrylate, and methyl (meth)acrylate. and (meth)acrylate hydroxyl ester It is at least one species selected from a larger group. .

[0006] The present invention further provides a functional layer whose raw materials include the composition described above.

[0007] The present invention further provides a display module having the above-described functional layer. [Effects of the Invention]

[0008] The composition having the special composition described in this application can exhibit a low dielectric constant and therefore has an excellent shielding role against static charge. This shielding role contributes to reducing the concentration of static charge on the screen body, thereby improving the display effect of the display module by suppressing damage to thin-film transistors caused by static charge, effectively reducing the probability of the green screen phenomenon occurring in the display module, and improving the manufacturing yield of the display module. [Modes for carrying out the invention]

[0009] To clarify the purpose, technical solution, and advantages of this application, the technical solution will be described clearly and completely below with reference to the embodiments of this application. Naturally, the embodiments described are only a part of the embodiments of this application, not all of them. A person skilled in the art will find that all other embodiments obtained without creative work based on the embodiments of this application fall within the scope of protection of this application.

[0010] In a first aspect, the present application provides a composition containing, by mass, 50 to 70 parts (meth)acrylic acid compound, 30 to 50 parts additive, 30 to 50 parts active diluent, and 0 to 10 parts auxiliary agent. The additive includes a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer.

[0011] However, (meth)acrylic acid compounds include (meth)acrylic acid and polyurethane (meth) Acrylate Polyester (meta) Acrylate Polyether (Meta) Acrylate , epoxy (meta) AcrylateThe invention comprises at least one of the following, where the first polyolefin-polyisoprene-second polyolefin block copolymer is defined as two polyolefin blocks linked via polyisoprene, and the invention does not limit the specific monomers in the first polyolefin and the second polyolefin, where the monomers in the first polyolefin and the second polyolefin are polymers obtained by independently polymerizing olefin monomers. Exemplary examples include blocks independently obtained by ethylene homopolymerization, blocks obtained by propylene homopolymerization, or ethylene-propylene copolymer blocks. The invention does not limit the molecular weights of the first polyolefin and the second polyolefin, where their molecular weights may be the same or different, and the invention also does not limit the molecular weight of the first polyolefin-polyisoprene-second polyolefin block copolymer, where the block copolymer generally has a weight-average molecular weight of 100,000 or more.

[0012] The additive of this application may be a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer, or a composition of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives, in addition to the first polyolefin-polyisoprene-second polyolefin block copolymer. When the additive is a composition of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives, this application does not limit the mass ratio of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives. A derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer as used in this application refers to a product obtained by substituting the first polyolefin and / or the second polyolefin with substituents, such as C1-C10 alkyl (including linear alkyl, branched alkyl, and naphthene), halogen, hydroxyl, nitro, amino, cyano, silyl, siloxy, etc.

[0013] The active diluents are mainly (meth)acrylate ester compounds, such as ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, hydroxyl (meth)acrylate, glycol-based ethyl (meth)acrylate, glycol-based butyl (meth)acrylate, glycol-based methyl (meth)acrylate, glycol-based hydroxyl (meth)acrylate, alkoxy(meth)acrylate, alkoxy(meth)acrylate, butyl (meth)acrylate, and alkoxy(meth)acrylate. ,a Lucoxi ( It contains at least one of the hydroxyl meth)acrylate esters.

[0014] Furthermore, the additives in the composition mainly consist of one or more of the following: an antifoaming agent, a leveling agent, and a polymerization inhibitor.

[0015] The primary role of an antifoaming agent is to suppress, reduce, or remove bubbles in a composition. This application does not specifically limit the selection of the antifoaming agent, as long as it can satisfy the above performance requirements, such as alcohol-based compounds.

[0016] The primary role of polymerization inhibitors is to improve the storage stability of the composition. Polymerization inhibitors may include at least one of the following: hydroquinone, benzoquinone, parahydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, and tris(N-nitroso-N-phenylhydroxylamine)aluminum salt (polymerization inhibitor 510).

[0017] Leveling agents are primarily used to improve the fluidity of a composition and its wettability to a substrate. This application does not specifically limit the selection of leveling agents, as long as they can satisfy the above performance requirements, such as silicone resin-based agents.

[0018] This application formulates components with different polarities in a certain ratio so that the final composition exhibits a low dielectric constant (the dielectric constant of the composition is 3.1 or less, and ultimately the dielectric constant of the functional layer containing the composition is 2.5 or less). Therefore, the said composition can be applied to scenarios where it is necessary to prevent electrostatic attraction and effectively shield static electricity. This application does not limit the specific application forms of the said composition. The said composition may be used individually or may be mixed with other functional components as a component having an antistatic function. When the said composition is used by mixing with other functional components, first, (meth)acrylic acid-based compounds, additives, active diluents, and auxiliary agents are mixed in a predetermined mass ratio to obtain the said composition, and then it is preferable to perform the next mixing step with other functional layer components. 55 to 65 parts of (meth)acrylic acid-based compounds, 35 to 45 parts of additives, 35 to 45 parts of active diluents, and 3 to 7 parts of auxiliary agents are preferable. Optionally, the (meth)acrylic acid-based compounds are 51, 53, 54, 56, 57, 58, 61, 63, 64, 67, or 68 parts, the additives are 31, 32, 33, 34, 37, 38, 42, 43, or 47 parts, the active diluents are 32, 33, 34, 36, 38, 41, 43, or 48 parts, and the auxiliary agents are 1, 2, 3, 6, 7, or 9 parts.

[0019] Also, this application does not particularly limit the addition procedure of each component constituting the composition as long as it is ensured that each component can be uniformly mixed.

[0020] Furthermore, when the weight average molecular weight of the additive is 100,000 to 300,000, the dielectric constant of the composition is further reduced, which further contributes to shielding static charges. Optionally, the additive has a weight average molecular weight of 100,000, 120,000, 130,000, 150,000, 180,000, 200,000, 220,000, 240,000, 250,000, 270,000, 290,000, or 300,000.

[0021] In one specific embodiment, the additive comprises at least one of a polystyrene - polyisoprene - polystyrene block copolymer and / or its derivative, a polyethylene - polyisoprene - polyethylene block copolymer and / or its derivative, and a polypropylene - polyisoprene - polyethylene block copolymer and / or its derivative. However, the polystyrene - polyisoprene - polystyrene block copolymer and / or its derivative refers to a polystyrene - polyisoprene - polystyrene block copolymer, a derivative of the polystyrene - polyisoprene - polystyrene block copolymer, or a mixture of the polystyrene - polyisoprene - polystyrene block copolymer and the derivative of the polystyrene - polyisoprene - polystyrene block copolymer; the polyethylene - polyisoprene - polyethylene block copolymer and / or its derivative refers to a polyethylene - polyisoprene - polyethylene block copolymer, a derivative of the polyethylene - polyisoprene - polyethylene block copolymer, or a mixture of the polyethylene - polyisoprene - polyethylene block copolymer and the derivative of the polyethylene - polyisoprene - polyethylene block copolymer; and the polypropylene - polyisoprene - polyethylene block copolymer and / or its derivative refers to a polypropylene - polyisoprene - polyethylene block copolymer, a derivative of the polypropylene - polyisoprene - polyethylene block copolymer, or a mixture of the polypropylene - polyisoprene - polyethylene block copolymer and the derivative of the polypropylene - polyisoprene - polyethylene block copolymer.

[0022] Furthermore, the additive is a polystyrene - polyisoprene - polystyrene block copolymer and / or its derivative. However, the polystyrene block is 60 - 85 wt% and the polyisoprene block is 15 - 40 wt%.

[0023] The composition of the present application may further contain an initiator. The inventors have found that when an initiator is included in the composition, the dielectric constant can be further reduced by initiating the polymerization reaction of the composition, specifically, the rate of change in the dielectric constant before and after the initiation is generally 20% or more, and can reach up to 75%, and the difference in the rate of change is related not only to the specific selection of (meth)acrylic acid compounds, additives, and active diluents, but also to the parameters of the polymerization reaction conditions, and can therefore be adjusted as needed in application.

[0024] To ensure highly efficient initiation and avoid unnecessary effects on the components of the composition due to temperature, it is preferable to select a photoinitiator. When it is necessary to initiate the system, the composition containing the initiator can be exposed to UV light for about 20 seconds. To prevent premature initiation, the composition containing the initiator must be kept out of light during transport and storage.

[0025] For example, photoinitiators include 1-hydroxycyclohexylphenyl ketone and 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone. 、2 It contains one or more of the following: benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothioxanthone, and 2,4-diethylthioxanthone.

[0026] Furthermore, by including an initiator in the composition, the polymerization reaction of the composition is carried out, further reducing the dielectric constant. In addition, the polymerization reaction of the composition also contributes to a further reduction in the content of low molecular weight free radicals in the system, which makes the performance of suppressing electrostatic adsorption appear even more pronounced.

[0027] In a second aspect, the present application provides a functional layer whose raw materials comprise the composition of the first aspect described above.

[0028] In one embodiment, the functional layer comprises a composition containing 50-70 parts of a (meth)acrylic acid compound, 30-50 parts of an additive, 30-50 parts of an active diluent, and 0-10 parts of an auxiliary agent. It should be understood that the functional layer may contain other components in addition to the composition. As mentioned above, the composition has a low dielectric constant, so the functional layer can be used as a film layer to prevent electrostatic injection.

[0029] In another embodiment, the functional layer is obtained by polymerizing a raw material system containing the composition of the first embodiment described above. As described above, after polymerization of the composition is initiated, not only can the dielectric constant of the composition be further reduced, but the content of low molecular weight free radicals in the system is also significantly reduced, so the functional layer exhibits a more pronounced ability to prevent electrostatic injection.

[0030] The specific embodiment of the functional layer can be selected according to the needs of the application scenario.

[0031] The raw material system containing the composition may be prepared by coating it onto a substrate, molding it, and then peeling it off the substrate to obtain a functional layer, or by initiating polymerization of the raw material system containing the composition, coating the polymerized system onto a substrate, and then peeling it off the substrate to obtain a functional layer.

[0032] In one preferred embodiment, the functional layer of the present invention comprises a polymer, the polymer obtained by polymerizing at least a (meth)acrylic acid compound, an additive, and an active diluent as monomers, wherein the additive is a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer.

[0033] It should be understood that the above polymer may be a copolymer obtained by polymerizing three types of monomers together, or a block copolymer obtained by combining homopolymerized blocks of each of the three monomers, or a block composition obtained by combining the above copolymer and block copolymer. More specifically, the copolymer obtained by polymerizing the above three types of monomers together may be a (meth)acrylic acid compound, an additive, and an active Diluent The copolymer is obtained by polymerizing these monomers together, and the block copolymer obtained by combining homopolymerized blocks of each of the three monomers mentioned above is a block polymer containing a homopolymerized block of a (meth)acrylic acid compound, a homopolymerized block of an additive, and a homopolymerized block of an active diluent.

[0034] Since the functional layer having this configuration is obtained by polymerizing the aforementioned composition, the functional layer not only has a low dielectric constant but also a low content of low-molecular-weight free radicals. Therefore, due to the synergistic effect of these two factors, the functional layer can be applied to various devices as a film layer element that effectively prevents electrostatic adsorption. Specifically, the low-molecular-weight free radicals referred to in this application are hydroxyl and carboxyl.

[0035] Furthermore, the functional layer of the present invention has a dielectric constant of 1.5 to 2.5, an acid value of 0 to 1.4, and a hydroxyl value of 0 to 3.9. However, the acid value and hydroxyl value are used to characterize the carboxyl and hydroxyl content in the functional layer, respectively. By limiting the dielectric constant, acid value, and hydroxyl value of the functional layer as described above, the electrostatic shielding performance of the functional layer can be significantly improved. When the composition is specifically applied, a functional layer having the above parameters can be realized by controlling its composition. In one embodiment, the composition comprises, by mass, 50 to 70 parts acrylic acid, 30 to 50 parts polystyrene-polyisoprene-polyethylene block copolymer, 30 to 50 parts active diluent, 1 to 10 parts photoinitiator, and 1 to 5 parts auxiliary agent. Selectively, the polystyrene-polyisoprene-polyethylene block copolymer contains 60 to 85 wt% polystyrene and 15 to 40 wt% polyisoprene.

[0036] Furthermore, the functional layer has a dielectric constant of 1.5 to 2.0, an acid value of 0 to 1, and a hydroxyl value of 0 to 3. Selectively, the functional layer has a dielectric constant of 1.5, 1.6, 1.7, 1.8, 2.1, 2.3, or 2.4, an acid value of 0.2, 0.3, 0.4, 0.7, 0.8, 0.9, 1.1, 1.2, or 1.3, and a hydroxyl value of 0.5, 1.0, 1.2, 1.4, 1.5, 1.7, 1.8, 2.0, 2.2, 2.4, 2.5, 2.8, 3.0, 3.3, 3.5, 3.7, or 3.8.

[0037] In some other specific embodiments of the present application, the mechanical properties of the functional layer can be improved by further controlling the composition of the composition, specifically, the mechanical properties include energy storage modulus and adhesive strength. The inventors have identified a functional layer of Energy storage modulus is 164-180 kPa, adhesive strength is 1000-2100 g f In that case, preferably, the functional layer of Energy storage modulus is 170-172 kPa, adhesive strength is 1900-2000 g f In this case, it was found that problems of internal tearing and bubble formation during the application of the functional layer can be avoided. Selectively, the functional layer ofEnergy storage modulus of elasticity of 164, 165, 168, 170, 172, 175, 177, or 180 kPa, adhesive strength of 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, or 2100 g f That is the case.

[0038] This application does not limit the method for preparing the functional layer, and in one embodiment, the functional layer is obtained by the following preparation method.

[0039] The raw material system containing the composition is subjected to a polymerization reaction to obtain the functional layer.

[0040] However, by ensuring that the raw material system contains at least the aforementioned composition, it is possible to ensure that the functional layer has a lower dielectric constant.

[0041] If the raw material system contains other components, priority may be given to initiating the polymerization reaction of the composition, and the polymer may be mixed with the other components, or the composition may be mixed with the other components before initiating polymerization of the raw material system.

[0042] It should be understood that the procedure for adding each component in the composition is related to the structure of the polymer that is ultimately formed. In the specific implementation process of this application, it is sufficient to polymerize the raw material system containing the composition, and this application does not limit the structure of the final polymer. For example, first, a (meth)acrylic acid compound may be homopolymerized to form a homopolymerized block of the (meth)acrylic acid compound (represented by A), then an additive may be added and homopolymerized to obtain a homopolymerized block of the additive (represented by B), in which case the polymer may be a block copolymer containing A and B. Alternatively, first, a portion of the (meth)acrylic acid compound may be homopolymerized to form a homopolymerized block of the (meth)acrylic acid compound (represented by A), then the remaining (meth)acrylic acid compound and the additive may be added and copolymerized to obtain a copolymerized block of the (meth)acrylic acid compound and the additive (represented by C), in which case the polymer may be a block copolymer containing A and C. Alternatively, the (meth)acrylic acid compound and the additive may be added simultaneously and copolymerized, in which case the polymer may be a copolymer obtained by copolymerizing the (meth)acrylic acid compound and the additive as monomers.

[0043] In a third aspect, the present invention further provides a display module having the functional layer of the second aspect described above.

[0044] Since the functional layer functions as an electrostatic shield, it reduces the accumulation of static electricity in the display module, thereby avoiding the effects of static electricity on the reliability of the display module and the mass of the display.

[0045] In one specific embodiment, the display module has a display panel and a support layer located on the non-light-emitting side of the display panel, and the functional layer is located between the display panel and the support layer.

[0046] Specifically, the display panel has an emitting side and a non-emitting side facing each other, and the support layer located on the non-emitting side is mainly used to support and protect the display panel. The support layer is generally made of metal foil, so that it can effectively mitigate external impact forces received during the application of the display module. In some embodiments, a protective film is further located on the side of the support layer away from the display panel, and this protective film is attached to the surface of the support layer to protect the display module in operation, but this protective film may be peeled off when protection is not needed.

[0047] During the application or detection of display modules, both copper rod friction testing and protective film peeling of the display module cause a large injection of static charge into the display module. Some of this static charge enters directly into the display panel along the support layer, affecting the electrical performance of the thin-film transistor TFTs in the display panel through the back-channel effect. As a result, the display panel may experience display abnormalities, particularly the green screen phenomenon. On the other hand, by placing the aforementioned functional layer between the support layer and the display panel, the functional layer acts as an electrostatic barrier, preventing static charge from entering the display panel via the support layer. This avoids electrical damage to the thin-film transistor TFTs and improves the display performance of the display panel, thereby not only improving the yield of display modules but also significantly increasing user satisfaction.

[0048] The functional layer has a thickness of 5 to 25 μm when specifically applied. Selectively, the thickness of the functional layer is 5, 10, 15, 20, or 25 μm.

[0049] In addition to its electrostatic shielding role described above, the functional layer can also be used as an adhesive layer between the support layer and the display panel. Naturally, to further ensure the adhesive effect, other optical adhesive layers or pressure-sensitive adhesive layers commonly used in this field may be placed between the functional layer and the support layer, and between the functional layer and the display panel.

[0050] This application does not limit the specific configuration of the display panel, which generally includes a laminated screen body and a substrate, with a functional layer positioned between the substrate and a support layer. This application does not limit the type of display of the screen body, which may be, for example, an OLED display screen having at least a cathode layer, an emissive layer, and an anode layer. The substrate is located on the non-light-emitting side of the screen body and is mainly used to protect the screen body and prevent damage to the screen body during operation or use. The substrate is generally made of a flexible material such as polyimide.

[0051] Furthermore, on the light-emitting side of the display panel, the polarizing plate, optical adhesive layer, and cover plate are stacked in an order that gradually moves away from the display panel. However, the polarizing plate is used to adjust the light emitted from the display panel to improve the quality of the display, and the cover plate is used for the display panel The optical adhesive layer is used to seal and protect the cover plate from external damage, and is light-transmitting, used to fix and bond the cover plate and polarizer plate together.

[0052] This application does not particularly limit the thickness of each film layer constituting the display module. Specifically, the thicknesses of the screen body, substrate, support layer, cover plate, polarizing plate, and each adhesive layer are to match the conventional thicknesses in the art.

[0053] Because the display module of the present invention has excellent display performance, electronic devices equipped with the display module of the present invention (including, but not limited to, mobile phones, televisions, computers, etc.) also have excellent display performance, and the occurrence of green screen phenomena caused by electrostatic adsorption can be reduced to the greatest extent possible during application. [Examples]

[0054] The present application will be described in more detail below with reference to specific examples.

[0055] All additives used in the examples were purchased from Kraton Corporation in the United States.

[0056] Example 1a

[0057] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 65g of methacrylic acid. As an additive, there is 46 g of polyethylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 200,000 (70-75 wt% polyethylene, 25-30 wt% polyisoprene). There are 35g of ethyl acrylate as an active diluent.

[0058] Example 1b

[0059] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 1a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0060] Example 2a

[0061] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyurethane. Acrylate It weighs 67g, As an additive, there is 43g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 210,000 (80-85 wt% polyethylene, 15-20 wt% polyisoprene). There are 34g of alkoxy acrylate as an active diluent.

[0062] Example 2b

[0063] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 2a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0064] Example 3a

[0065] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyesters. Acrylate It weighs 66g, As an additive, there is 38 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polyethylene, 20-25 wt% polyisoprene). There are 34g of butyl acrylate as an active diluent.

[0066] Example 3b

[0067] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 3a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0068] Example 4a

[0069] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. , (meth)acrylic acid compounds include polyethers. Acrylate It weighs 60g, As an additive, polypropylene-polyisoprene-polyisoprene with a weight-average molecular weight of 210,000 38g of polyethylene block copolymer (75-80 wt% polyethylene, polyisoprene) 20-25 wt%) There are 40g of methyl acrylate as an active diluent.

[0070] Example 4b

[0071] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 4a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0072] Example 5a

[0073] Aside from the fact that the weight-average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer in this example is 80,000, composition 5a in this example is essentially identical to that in Example 1a.

[0074] Example 5b

[0075] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 5a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0076] Example 6a

[0077] Aside from the fact that the weight-average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer in this example is 320,000, composition 6a in this example is essentially identical to that in Example 1a.

[0078] Example 6b

[0079] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 6a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0080] Example 7a

[0081] The composition of this example contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary agent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 50g, As an additive, there is 30 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 240,000 (65-70 wt% polyethylene, 30-35 wt% polyisoprene). As an active diluent, there is 47g of methyl acrylate. The additives include 1g of ethylene glycol and 2g of polydimethicone.

[0082] Example 7b

[0083] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 7a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0084] Example 8

[0085] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0086] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0087] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 65g of methacrylic acid. As an additive, there is 46 g of polyethylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 200,000 (70-75 wt% polyethylene, 25-30 wt% polyisoprene). There are 35g of ethyl acrylate as an active diluent.

[0088] Example 9

[0089] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0090] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0091] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyurethane. Acrylate It weighs 67g, As an additive, there is 43g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 210,000 (80-85 wt% polyethylene, 15-20 wt% polyisoprene). There are 34g of alkoxy acrylate as an active diluent.

[0092] Example 10

[0093] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0094] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0095] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyesters. Acrylate It weighs 66g, As an additive, there is 38 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polyethylene, 20-25 wt% polyisoprene). There are 34g of butyl acrylate as an active diluent.

[0096] Example 11

[0097] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0098] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0099] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 60g, As an additive, there is 38 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polyethylene, 20-25 wt% polyisoprene). There are 40g of methyl acrylate as an active diluent.

[0100] Example 12

[0101] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0102] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0103] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 65g of methacrylic acid. As an additive, there is 46g of polyethylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 80,000 (70-75 wt% polyethylene, 25-30 wt% polyisoprene). There are 35g of ethyl acrylate as an active diluent.

[0104] Example 13

[0105] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0106] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0107] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 65g of methacrylic acid. As an additive, there is 46 g of polyethylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 320,000 (70-75 wt% polyethylene, 25-30 wt% polyisoprene). There are 35g of ethyl acrylate as an active diluent.

[0108] Example 14

[0109] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0110] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0111] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary agent. (meth)acrylic acid compounds include polyethers. AcrylateIt weighs 50g, As an additive, there is 30 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight-average molecular weight of 240,000 (65-70 wt% polyethylene, 30-35 wt% polyisoprene). As an active diluent, there is 47g of methyl acrylate. The additives include 1g of ethylene glycol and 2g of polydimethicone.

[0112] Example 15a

[0113] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 63g of methacrylic acid. As an additive, there is 44 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (70-75 wt% polystyrene, 25-30 wt% polyisoprene). There are 37g of ethyl acrylate as an active diluent.

[0114] Example 15b

[0115] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 15a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0116] Example 16a

[0117] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyurethane. Acrylate It weighs 67g, As an additive, there is 43g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (80-85 wt% polystyrene, 15-20 wt% polyisoprene). There are 34g of alkoxy acrylate as an active diluent.

[0118] Example 16b

[0119] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 16a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0120] Example 17a

[0121] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyesters. Acrylate It weighs 66g, As an additive, there is 38 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polystyrene, 20-25 wt% polyisoprene). There are 34g of butyl acrylate as an active diluent.

[0122] Example 17b

[0123] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 17a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0124] Example 18a

[0125] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 60g, As an additive, there is 38 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polystyrene, 20-25 wt% polyisoprene). There are 40g of methyl acrylate as an active diluent.

[0126] Example 18b

[0127] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 18a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0128] Example 19a

[0129] Aside from the weight-average molecular weight of the polystyrene-polyisoprene-polystyrene block copolymer in this example being 60,000, composition 19a in this example is essentially identical to that in Example 15a.

[0130] Example 19b

[0131] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 19a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0132] Example 20a

[0133] Aside from the weight-average molecular weight of the polystyrene-polyisoprene-polystyrene block copolymer in this example being 330,000, composition 20a in this example is essentially identical to that in Example 15a.

[0134] Example 20b

[0135] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 20a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0136] Example 21a

[0137] The composition of this example contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary agent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 55g, As an additive, there is 34 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 250,000 (65-70 wt% polystyrene, 30-35 wt% polyisoprene). As an active diluent, there is 49g of methyl acrylate. The additives include 1g of ethylene glycol and 2g of polydimethicone.

[0138] Example 21b

[0139] The method for preparing the functional layer in this embodiment is: The method includes adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 21a, and then coating the system with the initiator added onto the surface of a PET substrate, irradiating it with UV light to cure the system, and finally obtaining a functional layer.

[0140] Example 22

[0141] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0142] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition of Example 15a, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0143] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 63g of methacrylic acid. As an additive, there is 44 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (70-75 wt% polystyrene, 25-30 wt% polyisoprene). There are 37g of ethyl acrylate as an active diluent.

[0144] Example 23

[0145] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0146] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0147] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyurethane. AcrylateIt weighs 67g, As an additive, there is 43g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (80-85 wt% polystyrene, 15-20 wt% polyisoprene). There are 34g of alkoxy acrylate as an active diluent.

[0148] Example 24

[0149] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0150] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0151] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyesters. Acrylate It weighs 66g, As an additive, there is 38 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polystyrene, 20-25 wt% polyisoprene). There are 34g of butyl acrylate as an active diluent.

[0152] Example 25

[0153] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0154] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0155] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 60g, As an additive, there is 38 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 210,000 (75-80 wt% polystyrene, 20-25 wt% polyisoprene). There are 40g of methyl acrylate as an active diluent.

[0156] Example 26

[0157] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0158] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0159] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 63g of methacrylic acid. As an additive, there is 44 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 60,000 (70-75 wt% polystyrene, 25-30 wt% polyisoprene). There are 37g of ethyl acrylate as an active diluent.

[0160] Example 27

[0161] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0162] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0163] The composition of the above-mentioned composition in this example contains a (meth)acrylic acid compound, an additive, and an active diluent. As a (meth)acrylic acid compound, there is 63g of methacrylic acid. As an additive, there is 44 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 330,000 (70-75 wt% polystyrene, 25-30 wt% polyisoprene). There are 37g of ethyl acrylate as an active diluent.

[0164] Example 28

[0165] The display module of this embodiment has sequentially stacked cover plates of 650 μm, an OCA optical adhesive layer of 150 μm, a polarizing plate of 100 μm, a screen body of 40 μm, a functional layer of 25 μm, a PET support layer of 75 μm, and a relaxation layer of 260 μm.

[0166] However, the method for preparing the functional layer includes the steps of adding 3 g of 1-hydroxycyclohexylphenyl ketone, which is a photoinitiator, to the composition, applying the system with the initiator added to the surface of a PET substrate, irradiating it with UV light to cure the system, and then obtaining the functional layer.

[0167] The composition of this example contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary agent. (meth)acrylic acid compounds include polyethers. Acrylate It weighs 55g, As an additive, there is 34 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight-average molecular weight of 250,000 (65-70 wt% polystyrene, 30-35 wt% polyisoprene). As an active diluent, there is 49g of methyl acrylate. The additives include 1g of ethylene glycol and 2g of polydimethicone.

[0168] Comparative example 1a~Comparative example 4a, 7a

[0169] Comparative Examples 1a to 4a and 7a correspond one-to-one with Examples 1a to 4a and 7a, respectively, and the only difference from the examples is that no additives were added in the comparative examples.

[0170] Comparative example 1b~Comparative example 4b, 7b

[0171] Comparative Examples 1b to 4b and 7b correspond one-to-one with Examples 1b to 4b and 7b, respectively. The only difference from the examples is that no additives were added to the comparative examples.

[0172] Comparative Examples 8-11

[0173] Comparative Examples 8 to 11 correspond one-to-one with Examples 8 to 11, and the only difference from the examples is that the comparative examples do not contain additives.

[0174] Comparative Example 14

[0175] Comparative Example 14 corresponds to Example 14, and the only difference from the example is that the comparative example's composition does not contain any additives.

[0176] Comparative examples 15a, 21a

[0177] Comparative Examples 15a and 21a correspond one-to-one with Examples 15a and 21a, respectively, and the only difference from the examples is that no additives were added to the comparative examples.

[0178] Comparative examples 15b, 21b

[0179] Comparative Examples 15b and 21b correspond one-to-one with Examples 15b and 21b, respectively, and the only difference from the examples is that no additives were added to the comparative examples.

[0180] Comparative Example 22 Comparative Example 22 corresponds to Example 22, and the only difference from the example is that the comparative example's composition does not contain any additives.

[0181] Comparative Example 28

[0182] Comparative Example 28 corresponds to Example 28, and the only difference from the example is that the comparative example's composition does not contain any additives.

[0183] Test example

[0184] 1. Detection of dielectric constant The dielectric constants of the functional layers in the compositions of Examples 1a-7a, 15a-21a and Comparative Examples 1a-4a, 7a, 15a, 21a, and in Examples 1b-7b, 15b-21b and Comparative Examples 1b-4b, 7b, 15b, 21b were detected using an LCR tester, and the results are specifically shown in Table 1.

[0185] 2. Detection of acid value Compositions or functional layers from some of the Examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and some of the Comparative Examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b were taken, dissolved in ethanol, and phenolphthalein indicator was added to obtain a sample awaiting detection. The sample awaiting detection was titrated using potassium hydroxide solution until the sample turned light pink and the color did not disappear even when shaken. The volume of potassium hydroxide solution consumed was recorded, and the carboxyl content in the composition of the sample awaiting detection was calculated and expressed as an acid value (the acid value represents the mass of potassium hydroxide used to neutralize the carboxyl in 100g of the composition or functional layer, in mg). The results are shown in Table 1.

[0186] 3. Detection of hydroxyl value Compositions or functional layers from some of the Examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and some of the Comparative Examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b were taken and dissolved in ethanol. Then, 5 mL of pyridine anhydrous solution of phthalic anhydride (obtained by dissolving 42 g of phthalic anhydride in 300 mL of pyridine anhydride) and phenolphthalein indicator were added to 1 g of the composition or functional layer to obtain a sample awaiting detection, and hydroxyl The sample awaiting detection is titrated using potassium hydroxide solution, and the titration is stopped when the sample changes to a light pink color and the color does not disappear even when shaken. The volume of potassium hydroxide solution consumed is recorded, and the hydroxyl content in the composition of the sample awaiting detection is calculated according to the amount of phthalic anhydride and potassium hydroxide used, and expressed as the hydroxyl value (the hydroxyl value represents the mass of KOH present in equimolar amounts with hydroxyl in 100g of the composition or functional layer, in mg). The results are shown in Table 1.

[0187] 4. Detection of energy storage modulus and adhesive strength 1) The composition or functional layer in some of the examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and some of the comparative examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b was reduced to 1 mm. manufacturingThe sample was taken, and the energy storage modulus was detected in rotation mode using a DMA (Dynamic Mechanical Analyzer). The results are shown in Table 1. 2) The adhesive strength of the compositions or functional layers in Examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and Comparative Examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b was detected in accordance with the ASTM D3330 test standard. The results are shown in Table 1.

[0188] 5. Copper rod friction test Brightness and chromaticity data for different grayscale values ​​of the display modules in Examples 8-14, 22-28 and Comparative Examples 8-11, 14, 22, and 28 were tested. Then, the display modules were fixed onto a copper rod scribe carrier table, and the copper rod scribe device was operated with a friction pressure of 1N and a friction speed of 100mm / s. Brightness and chromaticity data were then tested after 24 hours of scribing.

[0189] The inspection will be passed if the difference in chromaticity and brightness before and after copper rod friction is less than 0.05, and the edges of the screen body do not show a green color when the display module is lit. However, if at least one of the differences in chromaticity and brightness before and after copper rod friction exceeds 0.05, or if the edges of the screen body show a green color when the display module is lit, the inspection will be failed. The results are shown in Table 2.

[0190] [Table 1] TIFF0007855005000002.tif152170

[0191] [Table 2]

[0192] As can be seen from Tables 1 and 2, the compositions of the embodiments of this application have low dielectric constants, and are particularly polymers. generateIn this case, the performance in suppressing the green screen phenomenon of the display module becomes more pronounced. Examples 12 and 13 and 26 and 27 can also pass the copper rod friction test, but the dielectric constant of their functional layers is higher than that of the functional layers in Examples 8 and 22. If further reduction of the dielectric constant is desired, this can be achieved by controlling the weight-average molecular weight of the additive to 100,000 to 300,000.

[0193] Finally, it should be noted that the above embodiments are intended to illustrate, and not limit, the technical solutions of the present application, and the present application is described in detail with reference to the embodiments described above. However, those skilled in the art can still modify the technical solutions described in the embodiments described above, or make equivalent substitutions for some or all of their technical features, and these modifications or substitutions should be understood not to deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present application.

[0194] This application claims priority to the Chinese patent application filed with the China National Patent Office on May 5, 2022, with application number 202210491952.2 and title "Composition, Functional Layer and Display Module," and to the Chinese patent application filed with the China National Patent Office on November 24, 2022, with application number 202211484405.8 and title "Composition, Functional Layer and Display Module," and all the contents of the above are incorporated into this application by reference.

Claims

1. A composition containing, by mass, 50 to 70 parts (meth)acrylic acid compound, 30 to 50 parts additive, 30 to 50 parts active diluent, and 0 to 10 parts auxiliary agent, The (meth)acrylic acid compound is at least one selected from the group consisting of (meth)acrylic acid, polyurethane (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, and epoxy (meth)acrylate. The additive is at least one selected from the group consisting of polystyrene-polyisoprene-polystyrene block copolymer, derivatives of polystyrene-polyisoprene-polystyrene block copolymer, polyethylene-polyisoprene-polyethylene block copolymer, derivatives of polyethylene-polyisoprene-polyethylene block copolymer, polypropylene-polyisoprene-polyethylene block copolymer, and derivatives of polypropylene-polyisoprene-polyethylene block copolymer. The composition wherein the active diluent is a (meth)acrylic acid ester compound, and the (meth)acrylic acid ester compound is at least one selected from the group consisting of ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, and hydroxyl (meth)acrylate.

2. The composition according to claim 1, wherein the additive has a weight-average molecular weight of 100,000 to 300,000.

3. The composition according to claim 1, wherein the additive is a polystyrene-polyisoprene-polystyrene block copolymer and / or a derivative of a polystyrene-polyisoprene-polystyrene block copolymer, wherein the polystyrene block is 60 to 85 wt% and the polyisoprene block is 15 to 40 wt%.

4. The composition according to claim 1, further comprising a photoinitiator containing one or more of the following: 1-hydroxycyclohexylphenyl ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 2-benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothioxanthone, and 2,4-diethylthioxanthone.

5. The composition according to claim 1, wherein the auxiliary agent comprises one or more of an antifoaming agent, a leveling agent, and a polymerization inhibitor.

6. The composition according to claim 5, wherein the polymerization inhibitor contains at least one of hydroquinone, benzoquinone, parahydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, and tris(N-nitroso-N-phenylhydroxylamine)aluminum salt.

7. A functional layer comprising a raw material containing the composition described in any one of claims 1 to 6.

8. The functional layer according to claim 7, wherein the functional layer contains at least a polymer obtained by polymerizing the (meth)acrylic acid compound, additives, and active diluent as monomers.

9. The functional layer according to claim 8, wherein the functional layer has an acid value of 0 to 1.4 and a hydroxyl value of 0 to 3.

9.

10. The functional layer according to claim 9, wherein the functional layer has an acid value of 0 to 1 and a hydroxyl value of 0 to 3.

11. The functional layer according to claim 8, wherein the functional layer has an energy storage modulus of 164 kPa to 180 kPa.

12. The functional layer according to claim 11, wherein the functional layer has an energy storage modulus of 170 kPa to 172 kPa.

13. The aforementioned functional layer is The functional layer according to claim 7, obtained by a preparation method comprising polymerizing the raw materials containing the composition.

14. A display module having the functional layer described in claim 7.

15. The display module according to claim 14, wherein the display module has a display panel and a support layer located on the non-light-emitting side of the display panel, and the functional layer is located between the display panel and the support layer.

Images