WO2023213015A1 - 一种组合物、功能层以及显示模组 - Google Patents

一种组合物、功能层以及显示模组 Download PDF

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Publication number
WO2023213015A1
WO2023213015A1 PCT/CN2022/107506 CN2022107506W WO2023213015A1 WO 2023213015 A1 WO2023213015 A1 WO 2023213015A1 CN 2022107506 W CN2022107506 W CN 2022107506W WO 2023213015 A1 WO2023213015 A1 WO 2023213015A1
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meth
functional layer
composition
acrylate
parts
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English (en)
French (fr)
Inventor
朱修剑
刘仁杰
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0079—Electrostatic discharge protection, e.g. ESD treated surface for rapid dissipation of charges
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • This application relates to a composition, functional layer and display module, and belongs to the field of display technology.
  • the present application provides a composition, functional layer and display module that can overcome related defects caused by static electricity.
  • composition which includes, in parts by mass: 50 to 70 parts of (meth)acrylic compounds, 30 to 50 parts of additives, 30 to 50 parts of reactive diluents, and 0 to 10 parts of auxiliaries. ;
  • the additives include first polyolefin-polyisoprene-second polyolefin block copolymer and/or derivatives of the first polyolefin-polyisoprene-second polyolefin block copolymer.
  • This application also provides a functional layer, and the raw material of the functional layer includes the above-mentioned composition.
  • This application also provides a display module, which includes the above-mentioned functional layer.
  • the display module includes 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.
  • This application has a composition with a special composition, which can exhibit a lower dielectric constant, and therefore has an excellent shielding effect on electrostatic charges.
  • This shielding effect is conducive to reducing the accumulation of electrostatic charges on the screen, thereby suppressing static electricity. It improves the display effect of the display module by eliminating the damage caused by charge to the thin film transistor, effectively reducing the probability of green screen phenomenon in the display module, and improving the production yield of the display module.
  • the first aspect of this application provides a composition, which includes, in parts by mass, 50 to 70 parts of (meth)acrylic compounds, 30 to 50 parts of additives, 30 to 50 parts of reactive diluents and 0 parts of auxiliary agents. ⁇ 10 servings;
  • the additives include first polyolefin-polyisoprene-second polyolefin block copolymer and/or derivatives of the first polyolefin-polyisoprene-second polyolefin block copolymer.
  • the (meth)acrylic 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.
  • the first polyolefin-polyisoprene-second polyolefin block copolymer refers to two polyolefin blocks linked by polyisoprene, and the first polyolefin and the second polyolefin are independently Including ethylene homopolymer block, propylene homopolymer block or ethylene-propylene copolymer block. This application does not limit the respective molecular weights of the first polyolefin and the second polyolefin.
  • Their molecular weights may be the same or different. This application also limits the molecular weight of the first polyolefin-polyisoprene-second polyolefin block copolymer. Without limitation, generally the weight average molecular weight of the block copolymer is above 100,000.
  • the additives in this application can also be the first polyolefin-polyisoprene-second polyolefin block copolymer.
  • Derivatives of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives, when the additive is the first polyolefin-polyisoprene-second when the additive is the first polyolefin-polyisoprene-second
  • the present application does not limit the mass ratio of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives.
  • the derivatives of the first polyolefin-polyisoprene-second polyolefin block copolymer referred to in this application refer to products in which the first polyolefin and/or the second polyolefin are substituted by substituents.
  • the substituents For example, it is a C1-C10 alkyl group (including linear alkyl group, branched chain alkyl group and cycloalkyl group), halogen, hydroxyl, nitro, amino, cyano group, silyl group, siloxy group, etc.
  • Reactive diluents are mainly (meth)acrylate compounds, such as ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, hydroxyl (meth)acrylate, and glycols.
  • Ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, hydroxyl (meth)acrylate, alkoxy (meth)acrylic acid At least one of ethyl ester, alkoxybutyl(meth)acrylate, alkoxymethyl(meth)acrylate, and (alkoxymethyl)hydroxyacrylate.
  • the auxiliary agents in the composition mainly include one or more of defoaming agents, leveling agents, and polymerization inhibitors.
  • defoaming agents The main function of defoaming agents is to inhibit, reduce and eliminate bubbles in the composition. As long as the defoaming agent can meet the above performance requirements, this application does not specifically limit the selection of defoaming agents, such as alcohol compounds.
  • Polymerization inhibitors may include, for example, hydroquinone, paraquinone, p-hydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, tris(N-hydroxyanisole) At least one of nitro-N-phenylhydroxylamine) aluminum salt (polymerization inhibitor 510), etc.
  • Leveling agents are mainly used to improve the fluidity of the composition and the wetting properties of the substrate. As long as the leveling agent can meet the above performance requirements, this application does not specifically limit the selection of leveling agents, such as silicone resins.
  • This application combines components with different polarities in a certain proportion, and finally makes the composition exhibit a lower dielectric constant (the dielectric constant is not higher than 2.5), so the composition can act on the function of preventing static electricity inhalation To effectively shield static electricity in demanding scenarios.
  • This application does not limit the specific application mode of the composition. It can be used alone or mixed with other functional components as an antistatic functional component. When mixed with other functional components, it is preferred to first mix (meth)acrylic compounds, additives, reactive diluents and auxiliaries in a defined mass ratio to obtain a composition, and then the composition is mixed with other functional layer components. Next step of mixing.
  • the (meth)acrylic 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 parts , 43 or 47 parts
  • the active diluent is 32, 33, 34, 36, 38, 41, 43 or 48 parts
  • the additive is 1, 2, 3, 6, 7 or 9 parts.
  • the present application has no special restrictions on the order in which the various components of the composition are added, as long as the components can be mixed evenly.
  • the weight average molecular weight of the additive is 10 to 30w, the dielectric constant of the composition will be further reduced, which is more beneficial to shielding electrostatic charges.
  • the weight average molecular weight of the additive is 10w, 12w, 13w, 15w, 18w, 20w, 22w, 24w, 25w, 27w, 29w or 30w.
  • compositions of the present application may also include an initiator.
  • an initiator included in the composition, the dielectric constant can be further reduced by initiating the polymerization reaction of the composition.
  • the change rate of the dielectric constant before and after initiation is generally not less than 20%, and can even be as high as 75%.
  • the difference in the change rate is not only related to the specific selection of (meth)acrylic compounds, additives, and reactive diluents, but also related to the polymerization reaction condition parameters, so it can be adjusted according to needs during the application process.
  • a photoinitiator is preferably selected in this application.
  • the composition including the initiator only needs to be exposed to UV light for illumination.
  • the illumination time is about 20 seconds. It should be noted that in order to avoid premature initiation, the composition including the initiator needs to be protected from light when it is in the transportation and storage stages.
  • photoinitiators include 1-hydroxycyclohexylphenylketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 1-hydroxycyclohexylphenylketone, 2-Benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothiaxanthone, One or more types of 2,4-diethylthioxanthone.
  • the polymerization reaction of the composition is also conducive to further reducing the content of small molecule free radicals in the system, thereby making The performance of inhibiting electrostatic adsorption is more significant.
  • a second aspect of the present application provides a functional layer, the raw material of which includes the composition of the first aspect.
  • the functional layer includes a composition, that is, 50 to 70 parts of (meth)acrylic compounds, 30 to 50 parts of additives, 30 to 50 parts of active diluents, and 0 to 10 auxiliaries in the functional layer. share. It is understood that the functional layer may include other components in addition to the composition. As mentioned above, since the composition has a low dielectric constant, the functional layer can be used as a film layer to prevent electrostatic injection.
  • the functional layer is obtained by polymerization of a raw material system including the composition of the first aspect.
  • a raw material system including the composition of the first aspect As mentioned above, when the composition is initiated and polymerized, not only its dielectric constant can be further reduced, but the content of small molecule free radicals in the system will also be significantly reduced, so the functional layer's ability to prevent electrostatic injection will be more prominent.
  • the implementation of the specific functional layer can be selected according to the needs of the application scenario.
  • the raw material system including the composition can be coated on the substrate and then peeled off from the substrate after molding to obtain a functional layer; or, after the raw material system including the composition is polymerized, the polymerization system can be coated on the substrate The top layer is then peeled off from the substrate to obtain the functional layer.
  • the functional layer of the present application includes a polymer obtained by polymerizing at least (meth)acrylic compounds, additives and reactive diluents as monomers.
  • the additive refers to the first polyolefin-polyisoprene-second polyolefin block copolymer and/or the derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer.
  • the above-mentioned polymer can be a copolymer obtained by copolymerizing three monomers with each other, or a block copolymer composed of a combination of homopolymerized blocks of each of the three monomers, or the above-mentioned copolymer and block copolymer. block composition. More specifically, the copolymer obtained by the copolymerization of the above three monomers refers to a copolymer in which (meth)acrylic compounds, additives and active additives are polymerized with each other.
  • the block combination of the homopolymerized blocks of each of the above three monomers is
  • the block copolymer refers to a block polymer including a homopolymer block of a (meth)acrylic compound, a homopolymer block of an additive, and a homopolymer block of a reactive diluent.
  • the functional layer of this composition is obtained by polymerizing the aforementioned composition. Therefore, the functional layer not only has a lower dielectric constant, but also has a lower content of small molecule free radicals. Therefore, under the synergistic effect of the two, the functional layer can serve as Film components that effectively prevent electrostatic adsorption are used in various devices. It should be noted that the small molecule free radicals referred to in this application are specifically hydroxyl and carboxyl groups.
  • the functional layer of the present application 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.
  • the acid value and hydroxyl value are used to characterize the content of carboxyl groups and hydroxyl groups in the functional layer, respectively.
  • the static electricity shielding performance of the functional layer can be significantly improved.
  • the composition of the composition can be controlled to achieve a functional layer with the above parameters.
  • the composition includes: 50 to 70 parts by mass of acrylic acid, polyethylene-polyisoprene -30 to 50 parts of polyethylene block copolymer, 30 to 50 parts of reactive diluent, 1 to 10 parts of photoinitiator, and 1 to 5 parts of additives.
  • the dielectric constant of the functional layer is 1.5-2.0, the acid value is 0-1, and the hydroxyl value is 0-3.
  • the dielectric constant of the functional layer is 1.5, 1.6, 1.7, 1.8, 2.1, 2.3 or 2.4, the acid value is 0.2, 0.3, 0.4, 0.7, 0.8, 0.9, 1.1, 1.2 or 1.3, and the hydroxyl value is 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.
  • the mechanical properties of the functional layer can also be improved.
  • the mechanical properties include storage modulus and adhesion.
  • the storage modulus of the functional layer can be 164, 165, 168, 170, 172, 175, 177 or 180kPa
  • the adhesion force can be 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 , 1900, 2000 or 2100g.
  • the functional layer is obtained by polymerizing a raw material system including the composition.
  • the raw material system at least includes the aforementioned composition, thereby ensuring that the functional layer has a lower dielectric constant.
  • the polymerization reaction of the composition can be initiated first, and then the polymer is mixed with the other components.
  • the composition can be mixed with other components before initiating polymerization of the raw material system.
  • the (meth)acrylic acid compound can be homopolymerized first to form a (meth)acrylic acid compound homopolymer block (denoted by A), and then an additive can be added to perform homopolymerization to obtain a homopolymerized block of the additive (denoted by B represented), in this case the polymer is a block copolymer including A-B; or some (meth)acrylic compounds can be homopolymerized first to form a (meth)acrylic compound homopolymer block (represented by A), Then add the remaining (meth)acrylic acid compounds and additives for copolymerization to obtain a copolymerized block (represented by C) of (meth)acrylic acid compounds and additives.
  • the polymer is a block copolymer including A-C; or it can be simultaneously Add (meth)acrylic acid compounds and additives to perform copolymerization.
  • the polymer includes a copolymer copolymerized with (meth)acrylic acid compounds and additives as monomers.
  • a third aspect of this application also provides a display module, which includes the functional layer of the second aspect.
  • the functional layer Since the functional layer has an electrostatic shielding effect, the functional layer can reduce the accumulation of static electricity in the display module and avoid the impact of static electricity on the reliability of the display module and display quality.
  • a display module includes 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.
  • the display panel has a light-emitting side and a non-light-emitting side arranged oppositely.
  • the support layer provided on the non-light-emitting side is mainly used to support and protect the display panel.
  • the support layer is generally made of metal foil, thereby effectively buffering the display module.
  • a protective film is provided on the side of the support layer away from the display panel. The protective film is attached to the surface of the support layer to protect the display module during operation. When protection is not required, the protective film can be Tear it off.
  • the aforementioned functional layer is provided between the support layer and the display panel. This functional layer can serve as an electrostatic barrier to prevent electrostatic charges from entering the display panel through the support layer, thereby improving the display performance of the display panel by avoiding electrical damage to the thin film transistor TFT. The effect not only improves the yield rate of the display module, but also significantly improves user satisfaction.
  • the thickness of the functional layer is 5 to 25 ⁇ m.
  • the thickness of the functional layer is 5, 10, 15, 20 or 25 ⁇ m.
  • the functional layer can also be used as an adhesive layer between the support layer and the display panel.
  • it can also be used as a bonding layer between the functional layer and the support layer and between the support layer and the display panel.
  • Other common optical adhesive layers or pressure-sensitive adhesive layers common in this field are arranged between the functional layer and the display panel.
  • This application does not limit the specific composition of the display panel. Generally, it includes a stacked screen body and a substrate, and the functional layer is located between the substrate and the support layer.
  • This application does not limit the display type of the screen.
  • it can be an OLED display screen including at least a cathode layer, a luminescent layer, and an anode layer; the substrate is located on the non-light-emitting side of the screen and is mainly used to protect the screen and prevent the screen from operating. Or it is damaged during use.
  • the substrate is generally made of flexible materials, such as polyimide.
  • the light-emitting side of the display panel includes a stacked polarizer, an optical adhesive layer, and a cover plate in an order gradually moving away from the display panel.
  • the polarizer is used to adjust the light emitted by the display panel to improve the display quality
  • the cover is used to seal and protect the display template to avoid external damage
  • the optical adhesive layer is light-transmissive and is used to fix the adhesive. Knot cover plate and polarizer.
  • each film layer that makes up the display module. Specifically, the thickness of the screen body, substrate, support layer, cover plate, polarizer and each glue layer is consistent with the existing thickness in the field.
  • the display module of the present application has excellent display effects
  • electronic devices including but not limited to mobile phones, televisions, computers, etc.
  • the display module of the present application also have excellent display effects, which can greatly improve the application process. Reduce the occurrence of green screen phenomenon caused by electrostatic adsorption.
  • composition of this example includes:
  • Additive 46g of polyethylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 20w
  • Reactive diluent 35g ethyl acrylate.
  • Example 1a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 1a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • composition of this example includes:
  • Example 2a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 2a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • composition of this example includes:
  • Additive 38g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 21w
  • Example 3a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 3a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • composition of this example includes:
  • Additive 38g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 21w
  • Example 4a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 4a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • composition 5a of this embodiment is basically the same as that of the embodiment 1a. The only difference is that the weight average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer in this embodiment is 8w.
  • Example 5a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 5a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • composition 6a of this example is basically the same as that of Example 1a. The only difference is that the weight average molecular weight of the polyethylene-polyisoprene-polyethylene block copolymer in this example is 32w.
  • composition of this example includes:
  • Additive 30g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 24w
  • Example 7a Add 3 g of the photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition of Example 7a, and then coat the system after adding the initiator on the surface of the PET substrate and subject it to UV irradiation. After the system is cured, a functional layer is obtained.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured , get the functional layer.
  • Additive 46g of polyethylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 20w
  • Reactive diluent 35g ethyl acrylate.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Reactive diluent alkoxy acrylate 34g.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Additive 38g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 21w
  • Reactive diluent butyl acrylate 34g.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Additive 38g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 21w
  • Reactive diluent methyl acrylate 40g.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Additive 46g of polyethylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 8w
  • Reactive diluent 35g ethyl acrylate.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Additive 46g of polyethylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 32w
  • Reactive diluent 35g ethyl acrylate.
  • the display module of this embodiment includes the sequentially stacked cover plate 650 ⁇ m/OCA optical adhesive layer 150 ⁇ m/polarizer 100 ⁇ m/screen body 40 ⁇ m/functional layer 25 ⁇ m/PET support layer 75 ⁇ m/buffer layer 260 ⁇ m.
  • the preparation method of the functional layer in this embodiment includes: adding 3g of photoinitiator 1-hydroxycyclohexyl phenyl ketone to the composition, and then coating the system after adding the initiator on the surface of the PET substrate and subjecting it to UV irradiation. After the system is cured, the functional layer is obtained.
  • Additive 30g of polypropylene-polyisoprene-polyethylene block copolymer with a weight average molecular weight of 24w
  • Additives 1g ethylene glycol, 2g polydimethylsiloxane.
  • Comparative Examples 1a to 4a and 7a correspond to Examples 1a to 4a and 7a respectively, and the only difference from the examples is that the comparative examples do not contain additives.
  • Comparative Examples 1b to 4b and 7b correspond to Examples 1b to 4b and 7b respectively, and the only difference from the Examples is that the Comparative Examples do not contain additives.
  • Comparative Examples 8 to 11 correspond to Examples 8 to 11 respectively, and the only difference from the Examples is that the compositions of the Comparative Examples do not contain additives.
  • Comparative Example 12 corresponds to Example 14, and the only difference from the Example is that the composition of the Comparative Example does not contain additives.
  • Titrate record the volume of potassium hydroxide solution consumed, calculate the hydroxyl content in the composition of the sample to be tested based on the dosage of phthalic anhydride and potassium hydroxide, and use the hydroxyl value (the hydroxyl value represents the amount of hydroxyl in 100g of the composition or functional layer) The mass of moles of KOH (mg). The results are shown in Table 1.
  • Example 7a 3.0 2.0 3.7 133kPa 1387g Comparative example 7a 3.4 2.1 3.9 120kPa 1294g Example 7b 2.7 1.8 3.4 160kPa 1599g Comparative example 7b 3.2 1.9 3.5 152kpa 1489g
  • the composition of the embodiment of the present application has a lower dielectric constant, especially after polymerization, the performance of suppressing the green screen phenomenon of the display module is more outstanding.
  • Examples 12 and 13 can also pass the copper rod friction test, the dielectric constant of the functional layer is still higher than that of the functional layer in Example 8. Therefore, when the intention is to further reduce the dielectric constant, it is possible to This is achieved by controlling the weight average molecular weight of the additives between 10 and 30w.

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Abstract

本申请提供一种组合物、功能层以及显示模组，所述组合物按照质量份数包括：(甲基)丙烯酸类化合物50～70份、添加剂30～50份、活性稀释剂30～50份以及助剂0～10份；所述添加剂包括第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和/或第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物。该组合物具有较低的介电常数，从而能够用作有效屏蔽静电的介质以克服静电引起的相关缺陷。

Description

一种组合物、功能层以及显示模组
本申请要求于2022年5月5日提交中国专利局、申请号为202210491952.2、申请名称为“一种组合物、功能层以及显示模组”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种组合物、功能层以及显示模组，属于显示技术领域。
背景技术
随着显示技术的发展，人们对显示器件的各项性能均提出了更高的要求，其中，柔性显示屏由于可随意弯折的特点使其在展开时具有优越的视觉享受，在收纳时具有便携小体积的优势，因此逐渐成为电子产品发展的一个主要趋势。
然而在柔性显示屏的使用过程中，静电的积累以及其放电过程都会不同程度的对显示屏造成损伤，严重影响显示屏的正常显示功能，尤其突出的是由于静电导致的显示器的绿屏现象。
发明内容
本申请提供一种组合物、功能层以及显示模组，能够克服静电引起的相关缺陷。
本申请提供一种组合物，所述组合物按照质量份数包括：(甲基)丙烯酸类化合物50～70份、添加剂30～50份、活性稀释剂30～50份以及助剂0～10份；
所述添加剂包括第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和/或第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物。
本申请还提供一种功能层，所述功能层的原料包括上述所述的组合物。
本申请还提供一种显示模组，所述显示模组包括上述所述的功能层。
可选地，所述显示模组包括显示面板以及位于所述显示面板非出光侧的 支撑层，所述功能层位于所述显示面板和所述支撑层之间。
本申请具有特殊组成的组合物，其能够表现出较低的介电常数，因此对于静电荷具有较为优异的屏蔽作用，该屏蔽作用有利于减少静电荷在屏体上的聚集，进而通过抑制静电荷对薄膜晶体管造成的损伤而提升显示模组的显示效果，有效的降低了显示模组出现绿屏现象的几率，提升了显示模组的制作良率。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请的实施例，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请第一方面提供一种组合物，所述组合物按照质量份数包括：(甲基)丙烯酸类化合物50～70份、添加剂30～50份、活性稀释剂30～50份以及助剂0～10份；
所述添加剂包括第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和/或第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物。
其中，(甲基)丙烯酸类化合物包括(甲基)丙烯酸、聚氨酯(甲基)丙烯酸、聚酯(甲基)丙烯酸、聚醚(甲基)丙烯酸、环氧(甲基)丙烯酸中的至少一种；第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物是指通过聚异戊二烯链接的两个聚烯烃嵌段，第一聚烯烃和第二聚烯烃各自独立地包括乙烯均聚嵌段、丙烯均聚嵌段或者乙烯-丙烯共聚嵌段。本申请不限定第一聚烯烃和第二聚烯烃各自的分子量，其分子量可以相同或者不同，本申请同时亦对第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的分子量不做限定，一般该嵌段共聚物的重均分子量在10万以上。
本申请的添加剂除了可以选用第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物之外，还可以为第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物，或者为第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和其衍生物的组合物，当添加剂为第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和其衍生物的组合物时，本申请不限定第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和其 衍生物的质量比例。本申请所指的第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物是指第一聚烯烃和/或第二聚烯烃被取代基取代后的产物，取代基例如为C1～C10的烷基(包括直链烷基、支链烷基和环烷基)、卤素、羟基、硝基、氨基、氰基、硅烷基、硅氧基等。
活性稀释剂主要为(甲基)丙烯酸酯类化合物，例如包括(甲基)丙烯酸乙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸甲酯、(甲基)丙烯酸羟基酯、二醇类(甲基)丙烯酸乙酯、二醇类(甲基)丙烯酸丁酯、二醇类(甲基)丙烯酸甲酯、二醇类(甲基)丙烯酸羟基酯、烷氧基(甲基)丙烯酸乙酯、烷氧基(甲基)丙烯酸丁酯、烷氧基(甲基)丙烯酸甲酯、(烷氧基甲基)丙烯酸羟基酯中的至少一种。
此外，该组合物中的助剂主要包括消泡剂、流平剂、阻聚剂中的一种或多种。
消泡剂的主要作用是抑制、降低、消除组合物中的气泡。只要消泡剂能满足上述性能要求，本申请对消泡剂的选择不做具体限定，例如醇类化合物。
阻聚剂的作用主要是提高组合物的贮存稳定性。阻聚剂例如可以包括对苯二酚、对苯二醌、对羟基苯甲醚、2-叔丁基对苯二酚、2,5-二叔丁基对苯二酚、三(N-亚硝基-N-苯基羟胺)铝盐(阻聚剂510)等中的至少一种。
流平剂主要用于提高组合物的流动性以及对基材的润湿性能。只要流平剂能满足上述性能要求，本申请对流平剂的选择不做具体限定，例如有机硅树脂类。
本申请将具有不同极性的组分按照一定比例进行组合，并最终使组合物表现出较低的介电常数(介电常数不高于2.5)，因此该组合物能够作用于具有阻止静电吸入需求的场景中以有效屏蔽静电。本申请不限定该组合物的具体应用方式，其可以单独使用，或者作为具有抗静电功能组分与其他功能组分混合使用。当与其他功能组分混合使用时，优选先将(甲基)丙烯酸类化合物、添加剂、活性稀释剂和助剂按照限定的质量比例混合得到组合物，之后该组合物与其他功能层组分进行下一步的混合。优选的，(甲基)丙烯酸类化合物55～65份、添加剂35～45份、活性稀释剂35～45份以及助剂3～7份。可选的，(甲基)丙烯酸类化合物为51、53、54、56、57、58、61、63、64、67或68份，添加剂为31、32、33、34、37、38、42、43或47份，活性稀释 剂为32、33、34、36、38、41、43或48份，助剂为1、2、3、6、7或9份。
此外，对于组成组合物的各个组分的添加顺序，本申请亦无特殊限定，只要保证各个组分间能够混合均匀即可。
进一步地，当添加剂的重均分子量为10～30w时，组合物的介电常数会进一步降低，更又有利于对静电荷的屏蔽。可选的，添加剂的重均分子量为10w、12w、13w、15w、18w、20w、22w、24w、25w、27w、29w或30w。
本申请的组合物还可以包括引发剂。发明人发现，当组合物中包括引发剂时，可以通过引发该组合物发生聚合反应而进一步降低介电常数，具体地，引发前后介电常数的变化率一般不低于20％，甚至可高达75％，变化率的差异不仅和(甲基)丙烯酸类化合物、添加剂、以及活性稀释剂的具体选择相关，也和聚合反应条件参数相关，因此在应用过程中可以根据需求进行调节。
为了保证高效引发以及避免温度对组合物中的各组分造成非必要影响，本申请优选选择光引发剂。当需要对体系进行引发时，只需将包括引发剂的组合物暴露在UV光下进行光照即可，一般的，光照时间为20s左右。需要注意的是，为了避免提前引发，在包括引发剂的组合物处于运输和仓储阶段时，需要使其处于避光状态。
例如，光引发剂包括1-羟基环已基苯基酮、2-苄基-2-二甲基氨基-1-(4-吗啉苯基)丁酮、1-羟基环己基苯基酮、2-苄基-2-二甲基-1-(4-吗啉苯基)丁酮、二苯甲酮、4-苯基二苯酮、安息香二乙醚、2-氯代硫杂蒽酮、2,4-二乙基硫杂蒽酮中的一种或多种。
值得一提的是，当通过使组合物包括引发剂而使其发生聚合反应以进一步降低介电常数之外，组合物的聚合反应还有利于进一步降低体系的小分子游离基的含量，从而使抑制静电吸附的性能更为显著。
本申请第二方面提供一种功能层，该功能层的原料包括上述第一方面的组合物。
在一种实施方式中，该功能层包括组合物，即，功能层中(甲基)丙烯酸类化合物50～70份、添加剂30～50份、活性稀释剂30～50份以及助剂0～10份。能够理解，除了组合物之外，功能层还可以包括其他组分。如前述，由于组合物具有较低的介电常数，因此该功能层能够用作阻止静电注入的膜层进行应用。
在另一种实施方式中，该功能层由包括前述第一方面的组合物的原料体系进行聚合反应得到。如前述，当对组合物进行引发聚合后，不仅其介电常数能够得到进一步的降低，体系内的小分子游离基含量也会显著降低，因此功能层阻止静电注入的性能会更加突出。
具体功能层的实施方式可以根据应用场景的需求进行选择。
在制备时，可以将包括组合物的原料体系涂覆在基板上待其成型后与基板剥离，从而得到功能层；或者，将包括组合物的原料体系引发聚合后，将聚合体系涂覆在基板上随后与基板剥离，从而得到功能层。
作为一种优选的实施方式，本申请的功能层包括聚合物，所述聚合物至少以(甲基)丙烯酸类化合物、添加剂和活性稀释剂作为单体聚合得到。其中，添加剂是指第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和/或第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物。
可以理解的是，上述聚合物可以是三种单体相互共聚得到的共聚物，也可以是三个单体各自的均聚嵌段组合的嵌段共聚物，或者是上述共聚物和嵌段共聚物组合的嵌段组合物。更具体而言，上述三种单体相互共聚得到的共聚物是指(甲基)丙烯酸类化合物、添加剂以及活性添加剂彼此聚合的共聚物，上述三个单体各自的均聚嵌段组合的嵌段共聚物是指包括(甲基)丙烯酸类化合物均聚嵌段、添加剂的均聚嵌段以及活性稀释剂的均聚嵌段的嵌段聚合物。
该组成的功能层由前述组合物聚合得到，因此该功能层不仅具有较低的介电常数，而且其中的小分子游离基的含量较低，因此在二者的协同作用下，功能层能够作为有效阻止静电吸附的膜层元件而应用于各种装置中。需要说明的是，本申请所指的小分子游离基具体是羟基和羧基。
进一步地，本申请的功能层的介电常数为1.5～2.5，酸值为0～1.4，羟值为0～3.9。其中，酸值和羟值分别用于表征功能层中羧基和羟基的含量。通过对功能层的介电常数、酸值以及羟值进行上述限定，能够显著提升功能层屏蔽静电的性能。在具体应用过程中，可以通过控制组合物的组成以实现具有上述参数的功能层，在一种实施中，组合物按照质量份数包括：丙烯酸50～70份，聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物30～50份，活性稀释剂30～50份，光引发剂1～10份，助剂1～5份。
更进一步地，功能层的介电常数为1.5～2.0，酸值为0～1，羟值为0～3。可选的，功能层的介电常数为1.5、1.6、1.7、1.8、2.1、2.3或2.4，酸值为0.2、0.3、0.4、0.7、0.8、0.9、1.1、1.2或1.3，羟值为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或3.8。
在本申请的另一些具体实施方式中，通过进一步控制组合物的组成，还能够改善功能层的机械性能，具体地，机械性能包括储能模量以及粘附力。发明人发现，当功能层能的储能模量为164～180kPa，粘附力为1000～2100g，优选地，功能层能的储能模量为170～172kPa，粘附力为1900～2000g时，能够避免功能层在应用过程中出现内部撕裂以及产生气泡的问题。可选的，功能层能的储能模量为164、165、168、170、172、175、177或180kPa，粘附力为1000、1100、1200、1300、1400、1500、1600、1700、1800、1900、2000或2100g。
本申请不限定该功能层的制备方法，在一种实施方式中，功能层通过包括组合物的原料体系进行聚合反应而获得。
其中，原料体系中至少包括前述组合物，从而能够保证功能层具有更低的介电常数。
当原料体系中还包括其他组分时，可以优先引发组合物进行聚合反应后，再将聚合物与其他组分进行混合。或者，可以将组合物与其他组分先混合后再对原料体系进行引发聚合。
能够理解，组合物中各个组分的添加顺序与最终形成的聚合物结构相关。在本申请的具体实施过程中只要使包括组合物的原料体系发生聚合，本申请不限定最终聚合物的结构。例如，可以先使(甲基)丙烯酸类化合物发生均聚形成(甲基)丙烯酸类化合物均聚嵌段(用A表示)后，再加入添加剂进行均聚得到添加剂的均聚嵌段(用B表示)，此时聚合物为包括A-B的嵌段共聚物；或者可以先使部分(甲基)丙烯酸类化合物发生均聚形成(甲基)丙烯酸类化合物均聚嵌段(用A表示)后，再加入剩余(甲基)丙烯酸类化合物和添加剂进行共聚得到(甲基)丙烯酸类化合物和添加剂的共聚嵌段(用C表示)，此时聚合物为包括A-C的嵌段共聚物；或者可以同时加入(甲基)丙烯酸类化合物和添加剂进行共聚，此时聚合物为包括以(甲基)丙烯酸类化合物和添加剂为单体发生共聚的共聚物。
本申请第三方面还提供一种显示模组，该显示模组包括前述第二方面的功能层。
由于功能层具有静电屏蔽作用，因此该功能层能够降低静电在显示模组中的积累，避免静电对显示模组的可靠性以及显示质量的影响。
在一种具体实施方式中，显示模组包括显示面板以及位于所述显示面板非出光侧的支撑层，所述功能层位于所述显示面板和所述支撑层之间。
具体地，显示面板具有相对设置的出光侧和非出光侧，在非出光侧设置的支撑层主要用于对显示面板进行支撑和保护，支撑层一般采用金属箔材制作，从而能够有效缓冲显示模组在应用过程中所受到的外部冲击力。在一些实施方式中，支撑层远离显示面板的一侧还设置有保护膜，该保护膜贴附在支撑层的表面以对处于运转过程中的显示模组进行保护，当不需要保护时，可以将其进行撕除。
在显示模组的应用或检测过程中，无论是对显示模组的铜棒摩擦试验，还是保护膜的撕除，都会向显示模组内注入大量静电荷，部分静电荷会沿着支撑层直接进入显示面板内部，通过背沟道效应影响显示面板的薄膜晶体管TFT的电学性能，从而导致显示面板出现显示异常、尤其是出现绿屏现象。而本申请通过在支撑层和显示面板之间设置前述功能层，该功能层能够作为静电屏障阻止静电荷经支撑层进入显示面板，通过避免薄膜晶体管TFT的电性受损而提高显示面板的显示效果，不仅改善了显示模组的良率，更能够显著提升用户满意度。
在具体应用过程中，功能层的厚度为5～25μm。可选的，功能层的厚度为5、10、15、20或25μm。
功能层除了具有上述屏蔽静电的作用之外，其亦能作为支撑层和显示面板之间的粘结层进行使用，当然，为了进一步保证粘结效果，还可以在功能层和支撑层之间以及功能层和显示面板之间设置其他本领域常见的光学胶层或者压敏胶层。
本申请不限定显示面板的具体组成，一般的其包括层叠设置的屏体以及基板，且功能层位于基板和支撑层之间。本申请不限定屏体的显示类型，例如可以是至少包括阴极层、发光层以及阳极层的OLED显示屏；基板位于屏体的非出光侧主要用于对屏体进行保护，防止屏体在运转或者使用过程中受 到损伤，基板一般采用具有柔性的材料，例如聚酰亚胺。
此外，在显示面板的出光侧，按照逐渐远离显示面板的顺序包括层叠设置的偏光片、光学胶层以及盖板。其中，偏光片用于对显示面板发出的光进行调整从而改善显示品质；盖板用于对显示模板进行密封保护，避免外界对其造成损伤；光学胶层具有透光性，其用于固定粘结盖板和偏光片。
本申请对组成显示模组的各个膜层的厚度不做特别限制，具体地，屏体、基板、支撑层、盖板、偏光片以及各个胶层的厚度与本领域现有厚度一致。
由于本申请的显示模组具有优异的显示效果，因此包括本申请显示模组的电子装置(包括但不限于手机、电视机、电脑等)亦具有优异的显示效果，在应用过程中能够极大程度降低由于静电吸附导致的绿屏现象的发生。
以下，通过具体实施例对本申请进行更为详细的介绍。
所有实施例中的添加剂均购自美国科腾。
实施例1a
本实施例的组合物包括：
(甲基)丙烯酸类化合物：甲基丙烯酸65g
添加剂：重均分子量为20w的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物46g
活性稀释剂：丙烯酸乙酯35g。
实施例1b
本实施例的功能层的制备方法包括以下步骤：
在实施例1a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例2a
本实施例的组合物包括：
(甲基)丙烯酸类化合物：聚氨酯丙烯酸67g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物43g
活性稀释剂：丙烯酸烷氧基酯34g
实施例2b
本实施例的功能层的制备方法包括以下步骤：
在实施例2a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例3a
本实施例的组合物包括：
(甲基)丙烯酸类化合物：聚酯丙烯酸66g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物38g
活性稀释剂：丙烯酸丁酯34g
实施例3b
本实施例的功能层的制备方法包括以下步骤：
在实施例3a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例4a
本实施例的组合物包括：
(甲基)丙烯酸类化合物：聚醚丙烯酸60g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物38g
活性稀释剂：丙烯酸甲酯40g
实施例4b
本实施例的功能层的制备方法包括以下步骤：
在实施例4a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例5a
本实施例的组合物5a与实施例1a基本一致，唯一不同的是，本实施例的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物的重均分子量为8w。
实施例5b
本实施例的功能层的制备方法包括以下步骤：
在实施例5a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例6a
本实施例的组合物6a与实施例1a基本一致，唯一不同的是，本实施例的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物的重均分子量为32w。
实施例6b
本实施例的功能层的制备方法包括以下步骤：
在实施例6a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例7a
本实施例的组合物包括：
(甲基)丙烯酸类化合物：聚醚丙烯酸50g
添加剂：重均分子量为24w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物30g
活性稀释剂：丙烯酸甲酯47g
助剂：乙二醇1g、聚二甲硅氧烷2g
实施例7b
本实施例的功能层的制备方法包括以下步骤：
在实施例7a的组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
实施例8
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：甲基丙烯酸65g
添加剂：重均分子量为20w的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物46g
活性稀释剂：丙烯酸乙酯35g。
实施例9
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：聚氨酯丙烯酸67g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物43g
活性稀释剂：丙烯酸烷氧基酯34g。
实施例10
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：聚酯丙烯酸66g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物38g
活性稀释剂：丙烯酸丁酯34g。
实施例11
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：聚醚丙烯酸60g
添加剂：重均分子量为21w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物38g
活性稀释剂：丙烯酸甲酯40g。
实施例12
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：甲基丙烯酸65g
添加剂：重均分子量为8w的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物46g
活性稀释剂：丙烯酸乙酯35g。
实施例13
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：甲基丙烯酸65g
添加剂：重均分子量为32w的聚乙烯-聚异戊二烯-聚乙烯嵌段共聚物46g
活性稀释剂：丙烯酸乙酯35g。
实施例14
本实施例的显示模组包括依次层叠的盖板650μm/OCA光学胶层150μm/偏光片100μm/屏体40μm/功能层25μm/PET支撑层75μm/缓冲层260μm。
其中，本实施例的功能层的制备方法包括：在组合物中添加3g光引发剂1-羟基环己基苯基酮，随后将添加引发剂后的体系涂覆在PET基板表面并进行UV光照，待体系固化后，得到功能层。
本实施例的上述组合物包括：
(甲基)丙烯酸类化合物：聚醚丙烯酸50g
添加剂：重均分子量为24w的聚丙烯-聚异戊二烯-聚乙烯嵌段共聚物30g
活性稀释剂：丙烯酸甲酯47g
助剂：乙二醇1g、聚二甲硅氧烷2g。
对比例1a～对比例4a、7a
对比例1a～对比例4a、7a分别与实施例1a～实施例4a、7a一一对应，和实施例的唯一差异在于对比例中不含有添加剂。
对比例1b～对比例4b、7b
对比例1b～对比例4b、7b分别与实施例1b～实施例4b、7b一一对应，和实施例的唯一差异在于对比例中不含有添加剂。
对比例8～对比例11
对比例8～对比例11分别与实施例8～实施例11一一对应，和实施例的唯一差异在于对比例的组合物中不含有添加剂。
对比例12
对比例12与实施例14对应，和实施例的唯一差异在于对比例的组合物中不含有添加剂。
试验例
1、介电常数检测
采用LCR测试仪对上述实施例1a-7a以及对比例1a-4a、7a中的组合物、以及实施例1b-7b以及对比例1b-4b、7b中的功能层的介电常数进行检测，具体结果见表1。
2、酸值检测
取部分实施例1a-7a、1b-7b以及对比例1a-4a、7a、1b-4b、7b中的组合物或功能层并用乙醇溶解后，添加酚酞指示剂得到待测样，利用氢氧化钾溶液滴定所述待测样，记录试样颜色变为淡粉色且震荡后颜色不消失时停止滴定，记录所消耗的氢氧化钾溶液的体积，计算得到待测样的组合物中羧基含量，并用酸值(酸值表示中和100g组合物或功能层中羧基所用的氢氧化钾的质量，mg)表示。结果见表1。
3、羟值检测
取部分实施例1a-7a、1b-7b以及对比例1a-4a、7a、1b-4b、7b中的组合物或功能层并用乙醇溶解后，每克组合物或功能层添加5mL苯酐的无水吡啶溶液(42g苯酐溶于300mL无水吡啶中)、酚酞指示剂得到待测样，利用氢氧化钾溶液滴定所述待测样，记录试样颜色变为淡粉色且震荡后颜色不消失时停止滴定，记录所消耗的氢氧化钾溶液的体积，根据苯酐以及氢氧化钾的用量计算得到待测样的组合物中羟基含量，并用羟值(羟值表示100g组合物或功能层中与羟基等摩尔的KOH的质量，mg)表示。结果见表1。
4、储能模量和粘附力检测
1)取部分实施例1a-7a、1b-7b以及对比例1a-4a、7a、1b-4b、7b中的组合物或功能层并叠为1mm后的试样，利用DMA(动态热机械分析仪)在旋转模式下检测储能模量。结果见表1。
2)参考ASTM D3330测试标准检测实施例1a-6a、1b-6b以及对比例1a-4a、1b-4b中的组合物或功能层的粘附力。结果见表1。
5、铜棒摩擦试验
测试实施例8-14以及对比例8-11、12的显示模组在不同灰阶下的亮度和色度数据，随后，将显示模组固定在铜棒划线的载台上，设置摩擦压力为1N，摩擦速度为100mm/s，运行铜棒划线设备。测试划线24h后的亮度和色度数据。
若铜棒摩擦前后的色度差值和亮度差值均小于0.05，且同时观察显示模组点亮状态下屏体边缘并未呈现绿色，则检验通过；若铜棒摩擦前后的色度差值和亮度差值中的至少一个大于0.05，或，显示模组点亮状态下屏体边缘发绿，则不通过。结果见表2。
表1
  介电常数 酸值 羟值 储能模量 粘附力
实施例1a 2.8 1.6 3.6 120kPa 1355g
对比例1a 3.5 2.5 4.0 110kPa 1257g
实施例1b 2.0 1.4 3.0 164kPa 1692g
对比例1b 3.2 2.3 3.9 161kPa 1504g
实施例2a 2.9 1.7 3.7 100kPa 1450g
对比例2a 3.4 2.6 4.1 103kPa 1343g
实施例2b 1.7 1.3 2.9 178kPa 1862g
对比例2b 3.1 2.2 3.8 169kPa 1799g
实施例3a 2.9 1.8 3.6 130kPa 1420g
对比例3a 3.4 2.5 4.2 110kPa 1243g
实施例3b 2.0 1.2 3.0 168kPa 1786g
对比例3b 3.2 2.1 4.1 180kPa 1695g
实施例4a 2.9 1.7 3.8 123kPa 1465g
对比例4a 3.5 2.6 4.3 110kPa 1248g
实施例4b 1.9 1.3 2.8 167kPa 1964g
对比例4b 3.4 2.1 4.1 130kPa 1534g
实施例5a 3.0 1.9 3.9 100kPa 1267g
实施例5b 2.6 1.8 3.8 142kPa 1589g
实施例6a 3.1 2.0 3.8 130kPa 1364g
实施例6b 2.5 1.9 3.7 180kPa 1519g
实施例7a 3.0 2.0 3.7 133kPa 1387g
对比例7a 3.4 2.1 3.9 120kPa 1294g
实施例7b 2.7 1.8 3.4 160kPa 1599g
对比例7b 3.2 1.9 3.5 152kpa 1489g
表2
Figure PCTCN2022107506-appb-000001
根据表1和表2可知：本申请实施例的组合物具有较低的介电常数，尤其在发生聚合物后，在抑制显示模组绿屏现象的性能更为突出。虽然实施例12和13也能够通过铜棒摩擦试验，但是其中功能层的介电常数相对于实施例8中功能层的介电常数还是偏高，因此当意图使介电常数进一步降低时，可以通过控制添加物的重均分子量在10～30w之间实现。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (18)

  1. 一种组合物，所述组合物按照质量份数包括：(甲基)丙烯酸类化合物50～70份、添加剂30～50份、活性稀释剂30～50份以及助剂0～10份；
    所述添加剂包括第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物和/或第一聚烯烃-聚异戊二烯-第二聚烯烃嵌段共聚物的衍生物。
  2. 根据权利要求1所述的组合物，其中，所述添加剂的重均分子量为10～30w。
  3. 根据权利要求1或2所述的组合物，其中，所述组合物还包括光引发剂，所述光引发剂包括1-羟基环已基苯基酮、2-苄基-2-二甲基氨基-1-(4-吗啉苯基)丁酮、1-羟基环己基苯基酮、2-苄基-2-二甲基-1-(4-吗啉苯基)丁酮、二苯甲酮、4-苯基二苯酮、安息香二乙醚、2-氯代硫杂蒽酮、2,4-二乙基硫杂蒽酮中的一种或多种。
  4. 根据权利要求1或2所述的组合物，其中，所述(甲基)丙烯酸类化合物包括(甲基)丙烯酸、聚氨酯(甲基)丙烯酸、聚酯(甲基)丙烯酸、聚醚(甲基)丙烯酸、环氧(甲基)丙烯酸中的至少一种。
  5. 根据权利要求1或2所述的组合物，其中，活性稀释剂包括(甲基)丙烯酸酯类化合物，例如包括(甲基)丙烯酸乙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸甲酯、(甲基)丙烯酸羟基酯、二醇类(甲基)丙烯酸乙酯、二醇类(甲基)丙烯酸丁酯、二醇类(甲基)丙烯酸甲酯、二醇类(甲基)丙烯酸羟基酯、烷氧基(甲基)丙烯酸乙酯、烷氧基(甲基)丙烯酸丁酯、烷氧基(甲基)丙烯酸甲酯、(烷氧基甲基)丙烯酸羟基酯中的至少一种。
  6. 根据权利要求1或2所述的组合物，其中，所述助剂包括消泡剂、流平剂、阻聚剂中的一种或多种。
  7. 根据权利要求6所述的组合物，其中，所述消泡剂为醇类化合物。
  8. 根据权利要求6所述的组合物，其中，所述流平剂为有机硅树脂类化合物。
  9. 根据权利要求6所述的组合物，其中，所述阻聚剂包括对苯二酚、对苯二醌、对羟基苯甲醚、2-叔丁基对苯二酚、2,5-二叔丁基对苯二酚、三(N-亚硝基-N-苯基羟胺)铝盐中的至少一种。
  10. 一种功能层，所述功能层的原料包括权利要求1-9任一项所述的组合 物。
  11. 根据权利要求10所述的功能层，其中，所述功能层至少包括以所述(甲基)丙烯酸类化合物、所述添加剂和活性稀释剂为单体聚合得到的聚合物。
  12. 根据权利要求11所述的功能层，其中，所述功能层的介电常数为1.5～2.5，酸值为0～1.4，羟值为0～3.9。
  13. 根据权利要求12所述的功能层，其中，所述功能层的介电常数为1.5～2.0，酸值为0～1，羟值为0～3。
  14. 根据权利要求11所述的功能层，其中，所述功能层的储能模量为164～180kPa，粘附力为1000～2100g。
  15. 根据权利要求14所述的功能层，其中，所述功能层的储能模量为170～172kPa，粘附力为1900～2000g。
  16. 根据权利要求11-15任一项所述的功能层，其中，所述功能层通过包括所述组合物的原料体系进行聚合反应获取。
  17. 一种显示模组，所述显示模组包括权利要求10-16任一项所述的功能层。
  18. 根据权利要求17所述的显示模组，其中，所述显示模组包括显示面板以及位于所述显示面板非出光侧的支撑层，所述功能层位于所述显示面板和所述支撑层之间。
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