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]

[0001] The present application relates to a composition, a functional layer and a display module, and is in the field of display technology. [Background technology]

[0002] With the development of display technology, higher requirements are placed on the performance of display devices. Among them, flexible display screens have the characteristics of being freely bendable, which provides excellent visual enjoyment when unfolded, and has the advantages of being portable and small in volume when stored, and therefore have gradually become a major trend in the development of electronic products.

[0003] However, during use, the accumulation of static electricity and its discharge process of the flexible display screen will damage the display screen to different degrees, seriously affecting the normal display function of the display screen, especially causing the green screen phenomenon of the display screen due to static electricity. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application provides compositions, functional layers and display modules that can overcome defects caused by static electricity. [Means for solving the problem]

[0005] The present invention provides a composition comprising, by weight, 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 comprises a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of a first polyolefin-polyisoprene-second polyolefin block copolymer.

[0006] The present application further provides a functional layer, the raw material of which comprises the composition described above.

[0007] The present application further provides a display module having the above-mentioned functional layer. Effect of the Invention

[0008] The composition having the special composition of the present application can exhibit a low dielectric constant, and therefore has an excellent shielding role against static charges. This shielding role contributes to reducing the concentration of static charges on the screen body, thereby suppressing damage to thin film transistors caused by static charges, thereby improving the display effect of the display module, effectively reducing the probability of the green screen phenomenon occurring in the display module, and improving the manufacturing yield of the display module. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions are described below clearly and completely with reference to the embodiments of the present application, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application all belong to the protection scope of the present application.

[0010] In a first aspect, the present application provides a composition comprising, by weight, 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 comprises a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of a first polyolefin-polyisoprene-second polyolefin block copolymer.

[0011] However, the (meth)acrylic acid-based compound includes at least one of (meth)acrylic acid, polyurethane (meth)acrylic acid, polyester (meth)acrylic acid, polyether (meth)acrylic acid, and epoxy (meth)acrylic acid, and the first polyolefin-polyisoprene-second polyolefin block copolymer refers to two polyolefin blocks bonded via polyisoprene, and the present application does not limit the specific monomers in the first polyolefin and the second polyolefin, and the monomers in the first polyolefin and the second polyolefin are polymers obtained by independently polymerizing olefin monomers. Exemplarily, the monomers include, independently, an ethylene homopolymerized block, a propylene homopolymerized block, or an ethylene-propylene copolymer block. The present application does not limit the molecular weight of each of the first polyolefin and the second polyolefin, and the molecular weights may be the same or different. The present application also does not limit the molecular weight of the first polyolefin-polyisoprene-second polyolefin block copolymer, and the block copolymer generally has a weight average molecular weight of 100,000 or more.

[0012] The additive of the present 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, the present application does not limit the mass ratio of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives. The derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer referred to in the present application is a product obtained by substituting the first polyolefin and / or the second polyolefin with a substituent, and the substituent is, for example, C1 to C10 alkyl (including linear alkyl, branched alkyl, and naphthene), halogen, hydroxyl, nitro, amino, cyano, silyl, siloxy, etc.

[0013] The active diluent is mainly a (meth)acrylic acid ester-based compound, and contains at least one of, for example, ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, (meth)acrylic acid hydroxyl ester, glycol-based ethyl (meth)acrylate, glycol-based butyl (meth)acrylate, glycol-based methyl (meth)acrylate, glycol-based (meth)acrylic acid hydroxyl ester, alkoxy ethyl (meth)acrylate, alkoxy butyl (meth)acrylate, alkoxy methyl (meth)acrylate, and (alkoxy meth)acrylic acid hydroxyl ester.

[0014] Additionally, the auxiliary agents in the composition mainly include one or more of an antifoaming agent, a leveling agent, and a polymerization inhibitor.

[0015] The primary role of the defoamer is to inhibit, reduce or eliminate air bubbles in the composition. This application does not limit the selection of the defoamer to any specific compound, such as an alcohol-based compound, so long as the defoamer can meet the above performance requirements.

[0016] The main role of the polymerization inhibitor is to improve the storage stability of the composition. The polymerization inhibitor may contain at least one of, for example, hydroquinone, benzoquinone, parahydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, tris(N-nitroso-N-phenylhydroxylamine) aluminum salt (polymerization inhibitor 510), and the like.

[0017] The leveling agent is mainly used to improve the flowability of the composition and its wettability to the substrate. The present application does not specifically limit the selection of the leveling agent, such as silicone resin-based leveling agents, as long as the leveling agent can meet the above performance requirements.

[0018] In the present application, components having different polarities are mixed 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 the dielectric constant of the functional layer including the composition is 2.5 or less), so that the composition can be applied to scenes where it is necessary to prevent static electricity inhalation and can effectively shield static electricity. The present application does not limit the specific application form of the composition, and the composition may be used individually or mixed with other functional components as a component having an antistatic function. When the composition is used in a mixture with other functional components, it is preferable that the (meth)acrylic acid-based compound, additives, active diluents, and auxiliary agents are first mixed in a predetermined mass ratio to obtain the composition, and then the composition is mixed with other functional layer components in the next mixing step. It is preferable to use 55 to 65 parts of the (meth)acrylic acid-based compound, 35 to 45 parts of the additive, 35 to 45 parts of the active diluent, and 3 to 7 parts of the auxiliary. Alternatively, the (meth)acrylic acid compound is 51, 53, 54, 56, 57, 58, 61, 63, 64, 67, or 68 parts, the additive is 31, 32, 33, 34, 37, 38, 42, 43, or 47 parts, the active diluent is 32, 33, 34, 36, 38, 41, 43, or 48 parts, and the auxiliary is 1, 2, 3, 6, 7, or 9 parts.

[0019] In addition, the present application does not particularly limit the order of addition of each component constituting the composition, so long as 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 against 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 polystyrene-polyisoprene-polystyrene block copolymers and / or derivatives thereof, polyethylene-polyisoprene-polyethylene block copolymers and / or derivatives thereof, polypropylene-polyisoprene-polyethylene block copolymers and / or derivatives thereof. However, the polystyrene-polyisoprene-polystyrene block copolymer and / or derivatives thereof refer to polystyrene-polyisoprene-polystyrene block copolymer, derivatives of polystyrene-polyisoprene-polystyrene block copolymer, or a mixture of polystyrene-polyisoprene-polystyrene block copolymer and derivatives of polystyrene-polyisoprene-polystyrene block copolymer; the polyethylene-polyisoprene-polyethylene block copolymer and / or derivatives thereof refer to polyethylene-polyisoprene-polyethylene block copolymer, derivatives of polyethylene-polyisoprene-polyethylene block copolymer, or a mixture of polyethylene-polyisoprene-polyethylene block copolymer and derivatives of polyethylene-polyisoprene-polyethylene block copolymer; and the polypropylene-polyisoprene-polyethylene block copolymer and / or derivatives thereof refer to polypropylene-polyisoprene-polyethylene block copolymer, derivatives of polypropylene-polyisoprene-polyethylene block copolymer, or a mixture of polypropylene-polyisoprene-polyethylene block copolymer and derivatives of polypropylene-polyisoprene-polyethylene block copolymer.

[0022] Further, the additive is a polystyrene-polyisoprene-polystyrene block copolymer and / or derivatives thereof, with the polystyrene block being 60-85 wt% and the polyisoprene block being 15-40 wt%.

[0023] The composition of the present application may further include an initiator. The inventors have found that when the composition includes an initiator, the dielectric constant can be further reduced by initiating a polymerization reaction of the composition, specifically, the change rate of the dielectric constant before and after the initiation is generally 20% or more, and can reach 75%, and the difference in the change rate is not only related to the specific selection of the (meth)acrylic acid-based compound, additive, and active diluent, but also related to the parameters of the polymerization reaction conditions, so that it can be adjusted as necessary during application.

[0024] In order to ensure high efficiency initiation and to avoid unnecessary effects on each component in the composition due to temperature, the present application prefers to select a photoinitiator. When the system needs to be initiated, the composition containing the initiator can be exposed to UV light for light irradiation, and the light irradiation time is generally about 20s. In order to prevent premature initiation, the composition containing the initiator needs to be protected from light during transportation and storage.

[0025] For example, the photoinitiator includes one or more of 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothioxanthone, 2,4-diethylthioxanthone.

[0026] In addition, by making the composition contain an initiator, the composition undergoes a polymerization reaction to further reduce the dielectric constant, and the polymerization reaction of the composition also contributes to a further reduction in the content of low-molecular-weight free radicals in the system, thereby making the performance of suppressing electrostatic adsorption appear more remarkable.

[0027] In a second aspect, the present application provides a functional layer, the raw material of which comprises the composition of the first aspect above.

[0028] In one embodiment, the functional layer comprises a composition, i.e., the functional layer comprises 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. It should be understood that the functional layer may comprise other components in addition to the composition. As described above, the composition has a low dielectric constant, so that the functional layer may be applied as a film layer for preventing static electricity injection.

[0029] In another embodiment, the functional layer is obtained by polymerizing the raw material system containing the composition of the first aspect described above. As described above, after the composition is polymerized, not only can the dielectric constant of the composition be further reduced, but also the content of low molecular weight free radicals in the system is significantly reduced, so that the functional layer has more prominent performance of blocking static electricity injection.

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

[0031] During preparation, the raw material system containing the composition may be applied to a substrate and shaped, and then peeled off from the substrate to obtain a functional layer, or polymerization may be initiated in the raw material system containing the composition, and then the polymerization system may be applied to a substrate and then peeled off from the substrate to obtain a functional layer.

[0032] In one preferred embodiment, the functional layer of the present application includes a polymer obtained by polymerizing at least a (meth)acrylic acid-based compound, an additive, and an active diluent as monomers, where 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 kinds of monomers with each other, a block copolymer obtained by combining homopolymerized blocks 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 kinds of monomers with each other is a copolymer obtained by polymerizing a (meth)acrylic acid-based compound, an additive, and an active additive with each other, and the block copolymer obtained by combining homopolymerized blocks of the above three monomers with each other is a block polymer containing a homopolymerized block of a (meth)acrylic acid-based compound, a homopolymerized block of an additive, and a homopolymerized block of an active diluent.

[0034] The functional layer having the above-mentioned structure is obtained by polymerizing the above-mentioned composition, and therefore the functional layer not only has a low dielectric constant, but also has a low content of low molecular weight free radicals, so that the functional layer can be applied to various devices as a membrane element that effectively prevents electrostatic adsorption due to the synergistic role of both. The low molecular weight free radicals referred to in this application are specifically hydroxyl and carboxyl.

[0035] Furthermore, the functional layer of the present application has a dielectric constant of 1.5-2.5, an acid value of 0-1.4, and a hydroxyl value of 0-3.9. However, the acid value and the hydroxyl value are used to characterize the contents of carboxyl and hydroxyl 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, the composition can be controlled to realize a functional layer having the above parameters, and in one embodiment, the composition includes, by weight, 50-70 parts of acrylic acid, 30-50 parts of polystyrene-polyisoprene-polyethylene block copolymer, 30-50 parts of active diluent, 1-10 parts of photoinitiator, and 1-5 parts of auxiliary. Optionally, the polystyrene-polyisoprene-polyethylene block copolymer contains 60-85 wt% polystyrene and 15-40 wt% polyisoprene.

[0036] Additionally, the functional layer has a dielectric constant of 1.5 to 2.0, an acid number of 0 to 1, and a hydroxyl number of 0 to 3. Optionally, 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 number of 0.2, 0.3, 0.4, 0.7, 0.8, 0.9, 1.1, 1.2, or 1.3, and a hydroxyl number 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 composition of the composition can be further controlled to improve the mechanical performance of the functional layer, specifically, the mechanical performance includes the energy storage modulus and adhesive strength. The inventors have found that when the functional layer energy has an energy storage modulus of 164-180 kPa and an adhesive strength of 1000-2100 g, preferably when the functional layer energy has an energy storage modulus of 170-172 kPa and an adhesive strength of 1900-2000 g, the problem of internal tearing and bubble generation during application of the functional layer can be avoided. Optionally, the functional layer energy has an energy storage modulus of 164, 165, 168, 170, 172, 175, 177, or 180 kPa and an adhesive strength of 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, or 2100 g.

[0038] The present application does not limit the preparation method of the functional layer, and in one embodiment, the functional layer is obtained according to 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 above-mentioned composition, it is possible to ensure that the functional layer has a lower dielectric constant.

[0041] When the raw material system further includes other components, the polymer may be mixed with the other components with the priority being given to initiating the polymerization reaction of the composition, or the composition may be mixed with the other components and then polymerization may be initiated in the raw material system.

[0042] It should be understood that the order of addition of each component in the composition is related to the structure of the polymer that is finally formed. In the specific implementation process of the present application, it is sufficient to polymerize the raw material system including the composition, and the present application does not limit the structure of the final polymer. For example, first, a (meth)acrylic acid compound is homopolymerized to form a homopolymerized block of the (meth)acrylic acid compound (represented by A), then an additive is added and homopolymerized to obtain a homopolymerized block of the additive (represented by B), in which case the polymer is a block copolymer containing AB; alternatively, first, a part of the (meth)acrylic acid compound is 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 are 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 is a block copolymer containing AC; or, alternatively, a (meth)acrylic acid compound and an additive are added simultaneously and copolymerized, in which case the polymer is a copolymer in which the (meth)acrylic acid compound and the additive are copolymerized as monomers.

[0043] In a third aspect, the present application further provides a display module comprising a functional layer according to the second aspect described above.

[0044] Since the functional layer functions as a static electricity shield, the functional layer can reduce the accumulation of static electricity in the display module, and avoid the influence of static electricity on the reliability of the display module and the display mass.

[0045] In one specific embodiment, the display module includes a display panel and a support layer located on a 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 a light-emitting side and a non-light-emitting side arranged opposite to each other, and the support layer arranged on the non-light-emitting side is mainly used to support and protect the display panel, and the support layer is generally made of metal foil, so that it can effectively absorb the external impact force during application of the display module. In some embodiments, a protective film is further arranged on the side of the support layer away from the display panel, and the protective film is attached to the surface of the support layer to protect the display module during operation, and the protective film can be peeled off when protection is not required.

[0047] During application or detection of the display module, both the copper bar rubbing test of the display module and the peeling off of the protective film will cause a large amount of electrostatic charge to be injected into the display module, and some of the electrostatic charge will directly penetrate into the display panel along the support layer and affect the electrical performance of the thin film transistor TFT of the display panel through the back channel effect, resulting in the display panel having display abnormalities, especially the green screen phenomenon. Meanwhile, the present application arranges the above-mentioned functional layer between the support layer and the display panel, which can function as a static electricity barrier to prevent the electrostatic charge from penetrating into the display panel via the support layer, thereby avoiding electrical damage to the thin film transistor TFT and improving the display effect of the display panel, thereby not only improving the yield of the display module but also greatly improving user satisfaction.

[0048] In a specific application, the functional layer has a thickness of 5 to 25 μm. Optionally, the functional layer has a thickness of 5, 10, 15, 20, or 25 μm.

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

[0050] The present application does not limit the specific configuration of the display panel, and the display panel generally includes a screen body and a substrate arranged in a stacked manner, and a functional layer is arranged between the substrate and the support layer. The present application does not limit the display type of the screen body, and the display type of the screen body may be, for example, an OLED display screen having at least a cathode layer, a light-emitting layer, and an anode layer, and 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 it from being damaged during operation or use, and the substrate generally uses a flexible material such as polyimide.

[0051] In addition, on the light output side of the display panel, the polarizer, the optical adhesive layer, and the cover plate are stacked in order of increasing distance from the display panel, where the polarizer is used to adjust the light emitted from the display panel to improve the display quality, the cover plate is used to seal and protect the display template from external damage, and the optical adhesive layer is light-transmitting and used to fix and bond the cover plate and the polarizer.

[0052] The present application does not particularly limit the thickness of each film layer constituting the display module, specifically, the thickness of the screen body, substrate, support layer, cover plate, polarizer, and each adhesive layer should be consistent with the conventional thickness in this field.

[0053] Since the display module of the present application has an excellent display effect, electronic devices (including but not limited to mobile phones, televisions, computers, etc.) equipped with the display module of the present application also have an excellent display effect, and can minimize the occurrence of the green screen phenomenon caused by electrostatic adhesion during application. EXAMPLES

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

[0055] All additives in the examples were purchased from KRATON CORPORATION, USA.

[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-based compound, there is 65 g of methacrylic acid. As an additive, 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) was used. The active diluent is 35 g of ethyl acrylate.

[0058] Example 1b

[0059] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 1a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain a functional layer.

[0060] Example 2a

[0061] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 67 g of polyurethane acrylic acid. As an additive, 43 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 210,000 (80-85 wt% polyethylene, 15-20 wt% polyisoprene) was used. As an active diluent, there is 34 g of acrylic acid alkoxy ester.

[0062] Example 2b

[0063] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 2a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain a functional layer.

[0064] Example 3a

[0065] The composition of this example contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid compound, there was 66 g of polyester acrylic acid. As an additive, 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) was used. The active diluent is butyl acrylate, 34 g.

[0066] Example 3b

[0067] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 3a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system, thereby 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, As a (meth)acrylic acid-based compound, there is 60 g of polyether acrylic acid. As an additive, 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) was used. The active diluent is 40 g of methyl acrylate.

[0070] Example 4b

[0071] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 4a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain a functional layer.

[0072] Example 5a

[0073] Except for the weight average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer of this example being 80,000, composition 5a of this example is essentially identical to composition 1a of this example.

[0074] Example 5b

[0075] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 5a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain a functional layer.

[0076] Example 6a

[0077] Except for the weight average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer of this example being 320,000, composition 6a of this example is essentially identical to composition 1a of this example.

[0078] Example 6b

[0079] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 6a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain 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, As a (meth)acrylic acid-based compound, there is 50 g of polyether acrylic acid. As an additive, 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) was used. As an active diluent, there is 47 g of methyl acrylate. As auxiliary agents, it contains 1g of ethylene glycol and 2g of polydimethicone.

[0082] Example 7b

[0083] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 7a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system and obtain a functional layer.

[0084] Example 8

[0085] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0086] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0087] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there is 65 g of methacrylic acid. As an additive, 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) was used. The active diluent is 35 g of ethyl acrylate.

[0088] Example 9

[0089] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0090] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0091] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 67 g of polyurethane acrylic acid. As an additive, 43 g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 210,000 (80-85 wt% polyethylene, 15-20 wt% polyisoprene) was used. As an active diluent, there is 34 g of acrylic acid alkoxy ester.

[0092] Example 10

[0093] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0094] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0095] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid compound, there was 66 g of polyester acrylic acid. As an additive, 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) was used. The active diluent is butyl acrylate, 34 g.

[0096] Example 11

[0097] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0098] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0099] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there is 60 g of polyether acrylic acid. As an additive, 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) was used. The active diluent is 40 g of methyl acrylate.

[0100] Example 12

[0101] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0102] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

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

[0104] Example 13

[0105] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0106] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0107] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there is 65 g of methacrylic acid. As an additive, 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) was used. The active diluent is 35 g of ethyl acrylate.

[0108] Example 14

[0109] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0110] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0111] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary, As a (meth)acrylic acid-based compound, there is 50 g of polyether acrylic acid. As an additive, 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) was used. As an active diluent, there is 47 g of methyl acrylate. As auxiliary agents, it contains 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-based compound, there was 63 g of methacrylic acid. As an additive, 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) was used. The active diluent is ethyl acrylate, 37 g.

[0114] Example 15b

[0115] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 15a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby 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, As a (meth)acrylic acid-based compound, there was 67 g of polyurethane acrylic acid. As an additive, 43 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight average molecular weight of 210,000 (80-85 wt% polystyrene, 15-20 wt% polyisoprene) was used. As an active diluent, there is 34 g of acrylic acid alkoxy ester.

[0118] Example 16b

[0119] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 16a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby 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, As a (meth)acrylic acid compound, there was 66 g of polyester acrylic acid. As an additive, 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) was used. The active diluent is butyl acrylate, 34 g.

[0122] Example 17b

[0123] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 17a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby 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, As a (meth)acrylic acid-based compound, there is 60 g of polyether acrylic acid. As an additive, 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) was used. The active diluent is 40 g of methyl acrylate.

[0126] Example 18b

[0127] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 18a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0128] Example 19a

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

[0130] Example 19b

[0131] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 19a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0132] Example 20a

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

[0134] Example 20b

[0135] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 20a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby 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, As a (meth)acrylic acid compound, there was 55 g of polyether acrylic acid. As an additive, 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) was used. As an active diluent, there is 49 g of methyl acrylate. As auxiliary agents, it contains 1g of ethylene glycol and 2g of polydimethicone.

[0138] Example 21b

[0139] The method for preparing the functional layer in this embodiment is as follows: The method includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 21a, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0140] Example 22

[0141] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0142] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition of Example 15a, and then coating the system containing the initiator on the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0143] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 63 g of methacrylic acid. As an additive, 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) was used. The active diluent is ethyl acrylate, 37 g.

[0144] Example 23

[0145] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0146] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0147] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 67 g of polyurethane acrylic acid. As an additive, 43 g of polystyrene-polyisoprene-polystyrene block copolymer with a weight average molecular weight of 210,000 (80-85 wt% polystyrene, 15-20 wt% polyisoprene) was used. As an active diluent, there is 34 g of acrylic acid alkoxy ester.

[0148] Example 24

[0149] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0150] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0151] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid compound, there was 66 g of polyester acrylic acid. As an additive, 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) was used. The active diluent is butyl acrylate, 34 g.

[0152] Example 25

[0153] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0154] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0155] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there is 60 g of polyether acrylic acid. As an additive, 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) was used. The active diluent is 40 g of methyl acrylate.

[0156] Example 26

[0157] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0158] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0159] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 63 g of methacrylic acid. As an additive, 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) was used. The active diluent is ethyl acrylate, 37 g.

[0160] Example 27

[0161] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0162] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0163] The composition of the above composition of this embodiment contains a (meth)acrylic acid compound, an additive, and an active diluent, As a (meth)acrylic acid-based compound, there was 63 g of methacrylic acid. As an additive, 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) was used. The active diluent is ethyl acrylate, 37 g.

[0164] Example 28

[0165] The display module of this embodiment has a cover plate 650 μm / OCA optical adhesive layer 150 μm / polarizer 100 μm / screen body 40 μm / functional layer 25 μm / PET support layer 75 μm / relaxation layer 260 μm laminated in this order.

[0166] However, the method for preparing the functional layer includes the steps of adding 3 g of a photoinitiator, 1-hydroxycyclohexyl phenyl ketone, to the composition, and then applying the system containing the initiator to the surface of a PET substrate and irradiating it with UV light to harden the system, thereby obtaining a functional layer.

[0167] The composition of the present embodiment contains a (meth)acrylic acid compound, an additive, an active diluent, and an auxiliary, As a (meth)acrylic acid compound, there was 55 g of polyether acrylic acid. As an additive, 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) was used. As an active diluent, there is 49 g of methyl acrylate. As auxiliary agents, it contains 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 to Examples 1a to 4a and 7a, respectively, and the only difference from the Examples is that no additive was 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 to Examples 1b to 4b and 7b, respectively, and the only difference from the Examples is that no additive was added in the Comparative Examples.

[0172] Comparative Examples 8 to 11

[0173] Comparative Examples 8 to 11 correspond one-to-one to Examples 8 to 11, respectively, and the only difference from the Examples is that the compositions of the Comparative Examples do not contain any additives.

[0174] Comparative Example 14

[0175] Comparative Example 14 corresponds to Example 14, with the only difference being that the comparative composition does not contain any additives.

[0176] Comparative examples 15a, 21a

[0177] Comparative Examples 15a and 21a correspond one-to-one to Examples 15a and 21a, respectively, with the only difference being that no additive was added in the comparative examples.

[0178] Comparative examples 15b, 21b

[0179] Comparative Examples 15b and 21b correspond one-to-one to Examples 15b and 21b, respectively, with the only difference being that no additive was added in the comparative examples.

[0180] Comparative Example 22 Comparative Example 22 corresponds to Example 22, with the only difference being that the comparative composition does not contain any additives.

[0181] Comparative Example 28

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

[0183] Test Example

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

[0185] 2. Acid value detection The composition or functional layer in the examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and the comparative examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b is taken and dissolved in ethanol, and then phenolphthalein indicator is added to obtain a sample to be detected, and the sample to be detected is titrated using potassium hydroxide solution, and the titration is stopped until the color of the sample turns light pink and does not disappear even when shaken, and the volume of the consumed potassium hydroxide solution is recorded, and the carboxyl content in the composition of the sample to be detected is calculated and expressed as acid value (acid value represents the mass of potassium hydroxide used to neutralize the carboxyl in 100g of the composition or functional layer, expressed in mg). The results are shown in Table 1.

[0186] 3. Hydroxyl value detection The compositions or functional layers in the examples 1a-7a, 15a-21a, 1b-7b, and 15b-21b and the comparative examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, and 21b were dissolved in ethanol, and then 5 mL of anhydrous pyridine solution of phthalic anhydride (obtained by dissolving 42 g of phthalic anhydride in 300 mL of anhydrous pyridine) and phenolphthalein indicator were added to each gram of the composition or functional layer to obtain samples to be detected. The sample to be detected is titrated with potassium hydroxide solution, and the titration is stopped when the color of the sample turns to light pink and does not disappear when shaken, the volume of the consumed potassium hydroxide solution is recorded, and the hydroxyl content in the composition of the sample to be detected is calculated according to the amount of phthalic anhydride and potassium hydroxide used, and expressed as hydroxyl value (hydroxyl value represents the mass of KOH present in 100 g of the composition or functional layer in equimolar amounts with hydroxyl, expressed in mg). The results are shown in Table 1.

[0187] 4. Detection of energy storage modulus and adhesive force 1) Take samples of compositions or functional layers of 1 mm thickness in Examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and Comparative Examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b, and use a DMA (Dynamic Mechanical Analyzer) to detect the energy storage modulus in rotation mode. The results are shown in Table 1. 2) Detect the adhesive strength of the composition or functional layer in Examples 1a-7a, 15a-21a, 1b-7b, 15b-21b and Comparative Examples 1a-4a, 7a, 15a, 21a, 1b-4b, 7b, 15b, 21b according to the ASTM D3330 test standard. The results are shown in Table 1.

[0188] 5. Copper rod friction test The luminance and chromaticity data of the display modules of Examples 8-14, 22-28 and Comparative Examples 8-11, 14, 22, and 28 in different gray scales are tested, and then the display modules are fixed on a copper rod scribing carrier table, and the friction pressure is 1N, the friction speed is 100mm / s, and the copper rod scribing device is operated. The luminance and chromaticity data are tested after scribing for 24 hours.

[0189] If the difference in chromaticity and luminance before and after rubbing with the copper rod are both less than 0.05, and the edge of the screen body does not show green when the display module is turned on, the product passes the inspection. However, if at least one of the difference in chromaticity and luminance before and after rubbing with the copper rod exceeds 0.05, or the edge of the screen body shows green when the display module is turned on, the product fails the inspection. The results are shown in Table 2.

[0190] [Table 1] TIFF2024521280000002.tif154166

[0191] [Table 2]

[0192] As can be seen from Tables 1 and 2, the compositions of the examples of the present application have low dielectric constants, and in particular when polymerization occurs, the performance of suppressing the green screen phenomenon of the display module is more significant. Examples 12, 13, 26, and 27 can also pass the copper rod friction test, but the dielectric constants of the functional layers are higher than those of the functional layers of Examples 8 and 22. Therefore, if it is desired to further reduce the dielectric constant, it 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 for illustrating the technical solutions of the present application, but are not limiting thereof. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or make equivalent substitutions for some or all of the technical features thereof, and such modifications or substitutions shall not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0194] This application claims priority to a Chinese patent application filed with the China Patent Office on May 5, 2022, bearing application number 202210491952.2 and titled "Composition, Functional Layer and Display Module", and to a Chinese patent application filed with the China Patent Office on November 24, 2022, bearing application number 202211484405.8 and titled "Composition, Functional Layer and Display Module", the entire contents of which are incorporated herein by reference.

Claims

1. A composition comprising, by weight, 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, The composition, wherein the additive comprises a first polyolefin-polyisoprene-second polyolefin block copolymer and / or a derivative of a first polyolefin-polyisoprene-second polyolefin block copolymer.

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

3. 3. The composition of claim 1 or 2, wherein the additive comprises at least one of a polystyrene-polyisoprene-polystyrene block copolymer and / or derivatives thereof, a polyethylene-polyisoprene-polyethylene block copolymer and / or derivatives thereof, a polypropylene-polyisoprene-polyethylene block copolymer and / or derivatives thereof.

4. 4. The composition of claim 3, wherein the additive is a polystyrene-polyisoprene-polystyrene block copolymer and / or derivatives thereof, with the polystyrene block being 60-85 wt % and the polyisoprene block being 15-40 wt %.

5. 10. The composition of claim 1, further comprising a photoinitiator comprising one or more of 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothioxanthone, and 2,4-diethylthioxanthone.

6. 2. The composition of claim 1, wherein the (meth)acrylic acid-based compound contains at least one of (meth)acrylic acid, polyurethane (meth)acrylic acid, polyester (meth)acrylic acid, polyether (meth)acrylic acid, and epoxy (meth)acrylic acid.

7. 2. The composition of claim 1, wherein the active diluent contains a (meth)acrylic acid ester-based compound, and the (meth)acrylic acid ester-based compound contains at least one of ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, (meth)acrylic acid hydroxyl ester, glycol-based ethyl (meth)acrylate, glycol-based butyl (meth)acrylate, glycol-based methyl (meth)acrylate, glycol-based (meth)acrylic acid hydroxyl ester, alkoxy ethyl (meth)acrylate, alkoxy butyl (meth)acrylate, alkoxy methyl (meth)acrylate, and (alkoxy meth)acrylic acid hydroxyl ester.

8. 10. The composition of claim 1, wherein the adjuvant comprises one or more of a defoamer, a leveling agent, and a polymerization inhibitor.

9. The composition of claim 8, wherein the antifoaming agent is an alcohol-based compound.

10. The composition according to claim 8 , wherein the leveling agent is a silicone resin-based compound.

11. The composition of claim 8, wherein the polymerization inhibitor comprises at least one of hydroquinone, benzoquinone, parahydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, and tris(N-nitroso-N-phenylhydroxylamine) aluminum salt.

12. A functional layer, the raw material of which comprises the composition according to any one of claims 1 to 11.

13. The functional layer according to claim 12 , comprising at least a polymer obtained by polymerizing the (meth)acrylic acid-based compound, an additive, and an active diluent as monomers.

14. The functional layer according to claim 13, wherein the functional layer 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.

15. The functional layer according to claim 14, wherein 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.

16. The functional layer according to claim 13, wherein the functional layer has an energy storage modulus of 164 to 180 kPa and an adhesive strength of 1000 to 2100 g.

17. The functional layer according to claim 16, wherein the functional layer has an energy storage modulus of 170 to 172 kPa and an adhesive strength of 1900 to 2000 g.

18. The functional layer is The functional layer according to any one of claims 12 to 17, which is obtained according to a preparation method comprising subjecting a raw material system containing the composition to a polymerization reaction.

19. A display module comprising a functional layer according to any one of claims 12 to 18.

20. 20. The display module of claim 19, comprising a display panel and a support layer located on a non-light-emitting side of the display panel, the functional layer being located between the display panel and the support layer.