TW202337426A - Shading composition, preparation method thereof and display device - Google Patents

Abstract

The invention discloses a shading composition, a preparation method thereof and a display device, and belongs to the technical field of display. The shading composition is prepared from the following components in percentage by mass: 40 to 60 percent of polyurethane acrylate oligomer, 30 to 40 percent of acrylate monomer, 3 to 10 percent of photoinitiator, 0.3 to 5.5 percent of additive and 0.5 to 1.5 percent of metal complex dye, wherein the metal complex dye comprises at least two of a blue dye, a red dye and a purple dye, and the absorption wavelength of the metal complex dye is greater than 400nm. Through the synergistic effect of the components in reasonable proportion, the shading material formed after curing can show excellent comprehensive performance. The comprehensive performance of the shading material includes but is not limited to high curing degree, high optical density, sufficient hardness and tensile length, strong adhesive force, peelability, water vapor resistance, solvent resistance, aging resistance, high-temperature and high-humidity resistance and the like.

Description

Light-shielding composition and preparation method thereof, display device

The present invention relates to the field of display technology, and in particular to light-shielding compositions, preparation methods thereof, and display devices.

For a borderless display, there is no module frame on the side of the display screen. In order to prevent the backlight from leaking through the sides of the upper and lower glass substrates and the gap between them, the frame area outside the operable area of the display screen is usually Coat side shading material to achieve shading effect.

At present, the common side shading materials are usually UV-curable shading materials. This type of UV-curing shading materials contain black pigments and optional black dyes. The black pigments can be carbon black, through black pigments or black pigments and black dyes. Black dye is used to achieve blackening.

However, black pigments such as carbon black are difficult to disperse evenly in the light-shielding material system. It is even necessary to add a dispersant to the system to disperse the black pigments evenly. This will not only affect the overall performance of the light-shielding material, but also affect the curing of the light-shielding material system. Spend.

In view of this, the present invention provides a light-shielding composition, a preparation method thereof, and a display device, which can solve the above technical problems. Specifically, it includes the following technical solutions:

On the one hand, a light-shielding composition is provided, which includes the following mass percentage components: 40% to 60% of polyurethane acrylate oligomer, 30% to 40% of acrylic monomer, and photoinitiator 3% to 10%, additives 0.3% to 5.5%, and metal complex dyes 0.5% to 1.5%; wherein the metal complex dyes include at least two of blue dyes, red dyes, and purple dyes; and/or , the absorption wavelength of the metal complex dye is greater than 400nm.

In some possible implementations, the blue dye includes at least one of solvent blue 5 and solvent blue 70; and/or the red dye includes solvent red 8, solvent red 122, solvent red 119, and solvent red 132 , at least one of Solvent Red 124; and/or the purple dye includes at least one of Solvent Violet 58 and Triamet Violet 5R.

In some possible implementations, the functionality of the polyurethane acrylate oligomer is 2 to 3, and the weight average molecular weight is 1500 to 6000; and/or the polyurethane acrylate oligomer includes polyether type At least one of polyurethane, polyester polyurethane, polycarbonate polyurethane, and polybutadiene polyurethane.

In some possible implementations, the acrylate monomer includes at least one monofunctional acrylate and at least one trifunctional acrylate; and/or, the trifunctional acrylate is used in the light-shielding combination The quality percentage in the material is 1% to 5%.

In some possible implementations, the monofunctional acrylate includes at least one of dodecyl acrylate, isobornyl acrylate, isooctyl acrylate, tetrahydrofuran acrylate, and acrylomorpholine; and/or, the three The functional acrylate includes at least one of tris(hydroxymethyl)propane triacrylate and pentaerythritol triacrylate.

In some possible implementations, the photoinitiator includes at least one of photoinitiator TPO, photoinitiator 819, photoinitiator 907, photoinitiator ITX, photoinitiator 369, and photoinitiator DETX.

In some possible implementations, the photoinitiator includes at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator DETX.

In some possible implementations, the additives include: at least one of a silane coupling agent, a leveling agent, and an ultraviolet agent; the mass percentage of the silane coupling agent in the light-shielding composition is 0.1% to 3% ; The quality percentage of the leveling agent in the light-shielding composition is 0.1% to 1.5%; the quality percentage of the ultraviolet agent in the light-shielding composition is 0.1% to 1%.

On the other hand, a method for preparing a light-shielding composition is also provided. The light-shielding composition is as shown in any of the above. The preparation method of the light-shielding composition includes: in a light-proof environment, acrylate monomers are , photoinitiator and additives are stirred evenly to form a first mixture; polyurethane acrylate oligomer and metal complex dye are added to the first mixture, stirred evenly, and after pressure filtration, the photocurable is obtained. of sunscreen compositions.

On the other hand, a display device is also provided, with a light-shielding material on the display device, wherein the light-shielding material is prepared by photocuring using any of the light-shielding compositions as shown above, or by Prepared by the preparation method shown.

The beneficial effects of the technical solutions provided by the embodiments of the present invention at least include: the photocurable light-shielding composition provided by the embodiments of the present invention can be used to prepare light-shielding materials for display devices. The light-shielding composition includes a metal complex dye, and a metal complex dye It has good compatibility with polyurethane acrylate oligomers and acrylate monomers. Without the use of dispersants, the metal complex dyes can be fully and evenly dispersed in the light-shielding composition, showing high uniformity and Highly durable color. The metal complex dye includes at least two of blue dye, red dye, and purple dye. This combination of dyes can make the color of the produced light-shielding material appear blue-black or blue-violet, so that the light-shielding material has higher light density.

In addition, metal complex dyes also have the following characteristics: they do not absorb light sources with ultraviolet wavelengths, but can transmit visible light with wavelengths above 400nm (which can satisfy the appearance color without affecting the curing performance of the light-shielding composition), high dispersion, permeability, Weather resistance, color fastness, which allows metal complex dyes to not interfere with the curing process of the opacifying composition. The study found that through the synergistic effect of a reasonable proportion of polyurethane acrylate oligomers, acrylate monomers, photoinitiators, additives and metal complex dyes, the cured light-shielding material can exhibit excellent comprehensive properties. performance. Among them, the comprehensive properties of the light-shielding material include but are not limited to: high degree of curing, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and humidity resistance, etc. .

In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below.

As the displays of smart phones, computers, TVs and other electronic devices gradually develop towards borderless full-screen displays, more and more borderless displays are widely used. There is no module frame on the side of the display screen of borderless displays, making Its sides are unobstructed. Therefore, the backlight leaks light through the sides of the upper and lower glass substrates and the gap between them. In order to prevent the backlight from leaking through the sides of the upper and lower glass substrates and the gap between them, side light-shielding materials are usually coated on the frame area outside the operable area of the display screen to achieve a light-shielding effect.

For side shading materials, it is desirable that the side shading materials have at least the following properties: high optical density (OD), sufficient hardness and tensile length, strong adhesion, peelability (easy to repair), water vapor resistance , High temperature and humidity resistance, cold and heat shock resistance, etc. Moreover, in the production process of displays, it is required that the side light-shielding materials can be cured while dispensing glue. Therefore, the side light-shielding materials are usually UV-curable.

Currently, common UV-curable light-shielding materials usually include black pigments and optional black dyes. The black pigments can be carbon black, and blackening is achieved through black pigments or a combination of black pigments and black dyes.

However, it is difficult to disperse black pigments such as carbon black evenly in the light-shielding material system. It is even necessary to add a dispersant to the system to disperse the black pigments evenly. This will not only affect the curing performance of the system, but also affect the light-shielding material formed after curing. comprehensive performance.

The embodiment of the present invention provides a light-shielding composition, which includes the following mass percentage components: 40% to 60% of polyurethane acrylate oligomer, 30% to 40% of acrylic monomer, and photoinitiator 3% ~ 10%, additives 0.3% ~ 5.5%, metal complex dyes 0.5% ~ 1.5%.

Wherein, the metal complex dye includes at least two of blue dye, red dye, and purple dye, and the absorption wavelength of the metal complex dye is greater than 400 nm.

The light-shielding composition provided by the embodiment of the present invention can be used to prepare light-shielding materials for display device light-shielding. The light-shielding composition includes a metal complex dye, and the metal complex dye, polyurethane acrylate oligomer, and acrylate monomer all have With good compatibility, the metal complex dye can be fully and evenly dispersed in the light-shielding composition without the use of dispersants, showing high uniformity and highly durable color. The metal complex dye includes at least two of blue dye, red dye, and purple dye. This combination of dyes can make the color of the produced light-shielding material appear blue-black or blue-violet, so that the light-shielding material has higher light density.

In addition, metal complex dyes also have the following characteristics: they do not absorb light sources with ultraviolet wavelengths, but can transmit light with wavelengths greater than 400 nm, high dispersion, permeability, weather resistance, and color fastness, which makes metal complex dyes not affect The curing process of the sunscreen composition. The study found that through the synergistic effect of a reasonable proportion of polyurethane acrylate oligomers, acrylate monomers, photoinitiators, additives and metal complex dyes, the light-shielding material formed by curing the light-shielding composition can perform excellently comprehensive performance. Among them, the comprehensive properties of the light-shielding material include but are not limited to: high degree of curing, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and humidity resistance, etc. .

In the embodiment of the present invention, the quality percentage of the metal complex dye in the light-shielding composition is 0.5% to 1.5%, including but not limited to 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1% , 1.2%, 1.3%, 1.4%, 1.5%.

It is expected that metal complex dyes can transmit ultraviolet light (for example, LED light sources of 300nm~420nm), but not visible light. Blue dyes, red dyes, and purple dyes that meet the above requirements are as follows:

For example, the blue dye includes at least one of Solvent Blue 5 (Solvent Blue 5) and Solvent Blue 70 (Solvent Blue 70).

Exemplarily, red dyes include Solvent Red 8, Solvent Red 122, Solvent Red 119, Solvent Red 132, Solvent Red 124 ) at least one of them.

For example, the purple dye includes at least one of Solvent Violet 58 and (CFT) Triamet Violet 5R.

At least two of the above types of blue dyes, red dyes, and purple dyes are combined and work together with other components to enable the cured light-shielding material to present the desired blue-black or blue-violet color and to have a high OD value.

For example, the metal complex dye can be a combination of any two of blue dye, red dye, and purple dye, or a combination of three blue dyes, red dye, and purple dye. Just adjust the specific components of the metal complex dye and the content of each component according to the color you want to present.

In the embodiment of the present invention, the mass percentage of polyurethane acrylate oligomer in the light-shielding composition is 40% to 60%, including but not limited to 40%, 42%, 45%, 48%, 50%, 52% , 54%, 55%, 56%, 57%, 58%, 59%, 60%.

The curing system composed of polyurethane acrylate oligomer, acrylate monomer and photoinitiator can be cured under UV light irradiation to form a polymer network, which has a fast curing speed.

In some examples, polyurethane acrylate oligomers have a functionality of 2 to 3 and a weight average molecular weight of 1500 to 6000, including polyether polyurethane (conducive to increasing the elasticity and softness of the film), polyester polyurethane (making the film excellent in water resistance, high temperature and humidity resistance, and conducive to increasing strength), polycarbonate polyurethane (conducive to increasing the adhesion between the film and the substrate), polybutadiene type polyurethane (conducive to reducing moisture permeability) rate and water absorption), for example, includes at least one of polyester polyurethane and polybutadiene polyurethane.

For example, the molecular weight of the polyurethane acrylate oligomer can be 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000.

Exemplarily, polyether polyurethane is prepared from polyether polyol, diisocyanate and hydroxyacrylate with a molar ratio of 1:2:2 or 1:3:3. The molecular weight of the polyether polyol is 1000 to 5000. .

For example, polycarbonate polyurethane is prepared from polycarbonate diol, diisocyanate and hydroxyacrylate in a molar ratio of 1:2:2, and the polycarbonate diol has a molecular weight of 500 to 2,000.

Exemplarily, the polyester polyurethane is prepared from branched polyester polyol, diisocyanate and hydroxyacrylate with a molar ratio of 1:2:2 or 1:3:3. The branched polyester polyol is The molecular weight is 500~2000.

Exemplarily, the polybutadiene polyurethane is prepared from polybutadiene polyol, diisocyanate and hydroxyacrylate in a molar ratio of 1:2:2 or 1:3:3. The polybutadiene polyurethane is The molecular weight of alcohol is 1000~3000.

Exemplarily, diisocyanates include, but are not limited to, toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), hexamethylene diisocyanate (HDI), lysine diisocyanate (LDI), etc.

Exemplarily, hydroxyacrylates include, but are not limited to, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, polyethylene glycol monomethacrylate, and phenyl glycidyl ether acrylate.

In the embodiment of the present invention, the acrylate monomer is a kind of UV monomer, and its mass percentage in the light-shielding composition is 30% to 40%, which includes but is not limited to 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%.

In some examples, acrylate monomers suitable for embodiments of the present invention include at least one monofunctional acrylate and at least one trifunctional acrylate.

In some examples, monofunctional acrylates include lauryl acrylate (LA), isobornyl acrylate (IBOA), isooctyl acrylate (2-EHA), tetrahydrofuryl acrylate (THFA), 4-acryloylmorpholine (ACMO) at least one. The trifunctional acrylate includes at least one of tris(hydroxymethyl)propane triacrylate (TMPTA) and pentaerythritol triacrylate (PET3A). The trifunctional acrylate accounts for 1% to 1% by mass of the light-shielding composition. 5%, for example, the mass percentage of trifunctional acrylate in the light-shielding composition can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.

In some examples, the monofunctional acrylate includes at least one of dodecyl acrylate, isooctyl acrylate, and 4-acryloylmorpholine. Further, the monofunctional acrylate includes dodecyl acrylate and isooctyl acrylate. , at least two of 4-acryloylmorpholines.

When the monofunctional acrylate includes dodecyl acrylate, the mass percentage of dodecyl acrylate in the monofunctional acrylate is at least 20%. When the monofunctional acrylate includes isooctyl acrylate, isooctyl acrylate The mass percentage of ester in the monofunctional acrylate is at least 10%. When the monofunctional acrylate includes acrylomorpholine, the mass percentage of acrylomorpholine in the monofunctional acrylate is less than 30%. .

The acrylate monomer is selected from the composition of the monofunctional acrylate and the trifunctional acrylate shown above, and the mass percentage of the trifunctional acrylate in the light-shielding composition is 1% to 5%. This combination Working together with the above-mentioned polyurethane acrylate oligomers, the following comprehensive properties of the light-shielding material can be further optimized: high degree of curing, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, Resistant to aging, high temperature and humidity, etc.

In the embodiment of the present invention, the mass percentage of the photoinitiator in the light-shielding composition is 3% to 10%, including but not limited to 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%.

In some examples, photoinitiators suitable for embodiments of the present invention include: photoinitiator TPO (2,4,6 (trimethylbenzoyl) diphenylphosphine oxide), photoinitiator 819 (phenyl Bis(2,4,6～trimethylbenzoyl)phosphine oxide), photoinitiator 907 (2～methyl～1～[4～(methylthio)phenyl]～2～(4～ Morpholinyl)～1～acetone), photoinitiator ITX (2～isopropylthiaxantone), photoinitiator 369 (2～benzyl～2～dimethylamino～1～(4～morpholine At least one of the photoinitiator DETX (2,4-diethylthioxanthone).

Further, the photoinitiator includes at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator DETX. Further, the photoinitiator includes at least photoinitiator TPO, and photoinitiator 819 and photoinitiator DETX. At least one of the photoinitiator DETX, that is, at least a combination of photoinitiator TPO + photoinitiator 819, or a combination of photoinitiator TPO + photoinitiator DETX, or photoinitiator TPO + photoinitiator 819 + photoinitiator DETX combination.

When the photoinitiator includes photoinitiator TPO, the mass percentage of photoinitiator TPO in the photoinitiator is at least 30%. When the photoinitiator includes photoinitiator 819, the mass percentage of initiator 819 in the photoinitiator is at least 30%. The quality percentage of the photoinitiator is less than or equal to 35%. When the photoinitiator includes the photoinitiator DETX, the quality percentage of the initiator DETX in the photoinitiator is less than or equal to 35%.

By setting up the photoinitiator system as above, a better initiating effect can be obtained for the above-mentioned polyurethane acrylate oligomer and acrylate monomer system. It is suitable for LED lamp curing, which is conducive to improving the curing speed and degree of curing of the system, and can meet the needs of Process and curing performance requirements for enabling light-shielding compositions to be quickly cured while dispensing.

In some examples, the additives in the light-shielding composition provided by embodiments of the present invention include: at least one of a silane coupling agent, a leveling agent, and an ultraviolet agent.

Among them, the mass percentage of the silane coupling agent in the light-shielding composition is 0.1% to 3%, such as 0.1%, 0.2%, 0.5%, 0.7%, 1%, 1.3%, 1.5%, 1.8%, 2%, 2.3%, 2.5%, 2.6%, 2.8%, 3%.

Exemplarily, silane coupling agents include but are not limited to: γ～aminopropyltriethoxysilane (silane coupling agent KH～550), γ～(2,3～glycidoxy)propyltrimethoxysilane Silane (silane coupling agent KH～560), γ～methacryloxypropyltrimethoxysilane (silane coupling agent KH～570), 3～mercaptopropyltriethoxysilane (silane coupling agent KH ~ 580) at least one. The above-mentioned silane coupling agent can increase the adhesion or bonding force of the light-shielding material to the base material.

The mass percentage of the leveling agent in the light-shielding composition is 0.1% to 1.5%, for example, 0.1%, 0.2%, 0.5%, 0.7%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%.

Exemplarily, the leveling agents include, but are not limited to, silicone leveling agents and acrylic leveling agents. Further examples, the silicone leveling agents include, but are not limited to, BYK333, BYK331, BYK346, ETA~735, and acrylic leveling agents. Including but not limited to BYK354, BYK358, BYK361. The use of the above-mentioned leveling agent can help the light-shielding composition form a flat, smooth, and uniform film material, and can help optimize the hardness, tensile length and other properties of the light-shielding material.

The quality percentage of the ultraviolet agent in the light-shielding composition is 0.1% to 1%, such as 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, and 1%. For example, the ultraviolet agent may be at least one of Tinuvin 292, Tinuvin 1130, Tinuvin 123, Tinuvin 329, Tinuvin 405, Tinuvin 770, and Tinuvin 622. The UV agent can not only increase the storage stability of the system, but also synergizes with other components to increase the overall performance of the light-shielding material.

In summary, it can be seen that according to the formula of the light-shielding composition provided by the embodiment of the present invention, the light-shielding material can obtain a higher OD value at a thinner thickness, and also satisfy the curing performance at a larger thickness, and is suitable for The light-shielding composition with a thickness of more than 200 μm for display screens such as computers or TVs also achieves a high degree of curing; and effectively improves the hardness, tensile length, water absorption and moisture permeability of the light-shielding material.

The light-shielding composition provided by the embodiment of the present invention can be cured into a film in the following manner: using a dispensing machine to coat the above-mentioned light-shielding composition (coating pressure is 0.05MPa, coating temperature is 45-50°C) on a substrate (such as glass) ), use an LED light source with a wavelength of 365nm ~ 405nm, and use an energy of 800 MJ/cm2 ~ 1500MJ/cm2 to cure the light-shielding composition, so that the light-shielding composition is cured to form a film. The thickness of the prepared light-shielding film material can be 100μm～500μm.

On the other hand, embodiments of the present invention also provide a method for preparing a light-shielding composition. The light-shielding composition is as shown in any of the above.

The preparation method of the light-shielding composition includes: stirring the acrylate monomer, photoinitiator and additives evenly in a light-proof environment to form a first mixture.

For example, the acrylate monomer, photoinitiator and additives are stirred evenly at 40°C to 45°C, so that the photoinitiator is completely dissolved. When stirring, the stirring frequency can be 30HZ ~ 35HZ.

The polyurethane acrylate oligomer, the metal complex dye and the first mixture are stirred evenly and filtered under pressure to obtain a light-shielding composition.

The polyurethane acrylate oligomer and the metal complex dye are added to the first mixture and stirred evenly. After pressure filtration, a light-shielding composition is obtained.

For example, the polyurethane acrylate oligomer is preheated to 40°C to 45°C, and then added to the first mixture for stirring. The stirring time may be 2 to 3 hours to ensure that the light-shielding composition is stirred evenly.

When performing pressure filtration, the pressure can be less than or equal to 0.1MPa, and the temperature during filtration can be 40°C to 45°C.

The light-shielding composition provided by the embodiment of the present invention can be photocured to form a film-like light-shielding material.

On the other hand, embodiments of the present invention also provide a display device having a light-shielding material on the display device, wherein the light-shielding material is prepared by photocuring the light-shielding composition as shown above in the embodiments of the present invention, or by the light-shielding composition of the present invention. Examples were prepared by the preparation method shown above.

For example, the display device is a display panel. The display panel includes an upper substrate and a lower substrate arranged oppositely. The light-shielding composition is coated on the side surfaces of the upper substrate and the lower substrate and the gap between the upper substrate and the lower substrate.

In some examples, display panels are used in electronic devices such as smartphones, computers, and televisions.

Preferred embodiments of the invention will be described in more detail below. Although preferred embodiments of the present invention are described below, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. If specific techniques or conditions are not specified in the examples, the techniques or conditions described in literature in the field or product instructions will be followed. If the manufacturer of the reagents or instruments used is not indicated, they are all conventional products that can be purchased commercially. In the following examples, "%" refers to weight percentage unless otherwise specified.

The light-shielding compositions involved in the following Examples 1 to 5 are all prepared by the following method: in a light-proof environment, acrylate monomers, photoinitiators and additives are put into a reaction kettle, and the temperature is raised to 45°C. , start stirring at a frequency of 35HZ until the photoinitiator is completely dissolved. Continue to add the polyurethane acrylate oligomer that has been previously heated to 45°C into the reaction kettle, then add the metal complex dye into the reaction kettle, and continue stirring for 3 hours until the light-shielding composition system is evenly dissolved. Then, the light-shielding composition system is subjected to pressure filtration (pressure equal to 0.1MPA, temperature 40°C), and finally a light-shielding composition with uniform texture is obtained.

The polyurethane acrylate oligomers involved in the following examples are as follows: difunctional polyester polyurethane acrylate is prepared from polyester diol, isophorone diisocyanate and hydroxyethyl acrylate in a molar ratio of 1:2:2 Obtained, its weight average molecular weight is 1600; difunctional polybutadiene polyurethane acrylate is prepared from polybutadiene glycol, isophorone diisocyanate and hydroxyethyl acrylate with a molar ratio of 1:2:2 Obtained, its weight average molecular weight is 2200; difunctional polyether polyurethane acrylate is prepared from polyether diol, toluene diisocyanate and polyethylene glycol monomethacrylate with a molar ratio of 1:2:2, Its weight average molecular weight is 2600; the difunctional polycarbonate polyurethane acrylate is prepared from polycarbonate diol, toluene diisocyanate and polyethylene glycol monomethacrylate with a molar ratio of 1:2:2. Its weight average molecular weight is 1600; the trifunctional polyester polyurethane acrylate is prepared from polyester triol, isophorone diisocyanate and polyethylene glycol monomethacrylate in a molar ratio of 1:3:3. Its weight average molecular weight is 3000; the trifunctional polybutadiene polyurethane acrylate is prepared from polybutadiene triol, toluene diisocyanate and hydroxypropyl acrylate in a molar ratio of 1:3:3. The molecular weight is 4000; the trifunctional polyether polyurethane acrylate is prepared from polyether triol, isophorone diisocyanate and hydroxypropyl acrylate with a molar ratio of 1:3:3, and its weight average molecular weight is 4500;

For the formulas of the light-shielding compositions provided in Example 1, Example 2, Example 3, Example 4, and Example 5, please refer to the following Table 1, Table 2, Table 3, Table 4, and Table 5 respectively. Table 1 Project Raw material components quality percentage Oligomer Bifunctional polyester polyurethane acrylate 60% Acrylate monomer Lauryl acrylate LA 6% Isooctyl acrylate 2～EHA 8% Isobornyl acrylate IBOA 15% Tris(hydroxymethyl)propane triacrylate TMPTA 3% photoinitiator Photoinitiator TPO 2% Photoinitiator 819 1% Photoinitiator 907 2% metal complex dyes Solvent Red 8 0.2% Solvent Blue 5 0.2% Triamet Violet 5R 0.2% additives UV absorber Tinuvin 292 0.1% Leveling agent BYK333 0.3% Silane coupling agent KH570 2% Table 2 Project Raw material components quality percentage Oligomer Difunctional polybutadiene polyurethane acrylate 52% Acrylate monomer ACMO 3% Isooctyl acrylate 2～EHA 8% Isobornyl acrylate IBOA 25% Pentaerythritol triacrylate PET3A 3% photoinitiator Photoinitiator TPO 2.5% Photoinitiator DETX 1% Photoinitiator 907 2.5% metal complex dyes Solvent Red 124 0.4% Solvent Blue 5 0.2% Triamet Violet 5R 0.4% additives Tinuvin 292 0.1% BYK333 silicone leveling agent 0.4% Silane coupling agent KH580 1.5% table 3 Project Raw material components quality percentage Oligomer Difunctional polyether polyurethane acrylate 60% Acrylate monomer ACMO 3% Tetrahydrofuran acrylate THFA 3% Lauryl acrylate LA 25% Pentaerythritol triacrylate PET3A 2% photoinitiator Photoinitiator TPO 1.5% Photoinitiator ITX 2% Photoinitiator 819 1.5% metal complex dyes Solvent Red 119 0.3% Solvent Blue 5 0.2% Triamet Violet 5R 0.3% additives Tinuvin 292 0.1% BYK333 0.4% Silane coupling agent KH550 0.7% Table 4 Project Raw material components quality percentage Oligomer Difunctional polyether polyurethane acrylate 25% Trifunctional polyester polyurethane acrylate 30% Acrylate monomer ACMO 7.5% Tetrahydrofuran acrylate THFA 7.5% Isooctyl acrylate 2～EHA 15% Tris(hydroxymethyl)propane triacrylate TMPTA 5% photoinitiator Photoinitiator TPO 3% Photoinitiator DETX 2% Photoinitiator 369 3% metal complex dyes Solvent Red 8 0.1% Solvent Blue70 0.2% Triamet Violet 5R 0.2% additives Tinuvin 292 0.1% BYK333 0.4% Silane coupling agent KH550 1% table 5 Project Raw material components quality percentage Oligomer Trifunctional polybutadiene polyurethane acrylate 30% Trifunctional polyester polyurethane acrylate 25% Acrylate monomer Isooctyl acrylate 2～EHA 5% ACMO 8.5% Isobornyl acrylate IBOA 20% Tris(hydroxymethyl)propane triacrylate TMPTA 1.5% photoinitiator Photoinitiator TPO 2% Photoinitiator DETX 2% Photoinitiator 369 2% metal complex dyes Solvent Red 132 0.4% Solvent Blue70 0.4% Triamet Violet 5R 0.4% additives Tinuvin 292 1% BYK333 0.4% Silane coupling agent KH550 1.4% Table 6 Project Raw material components quality percentage Oligomer Bifunctional polycarbonate polyurethane acrylate 30% Trifunctional polyether polyurethane acrylate 30% Acrylate monomer Isooctyl acrylate 2～EHA 5% ACMO 8.5% Isobornyl acrylate IBOA 15% Tris(hydroxymethyl)propane triacrylate TMPTA 1.5% photoinitiator Photoinitiator TPO 2% Photoinitiator DETX 2% Photoinitiator 369 2% metal complex dyes Solvent Red 132 0.4% Solvent Blue70 0.4% Triamet Violet 5R 0.4% additives Tinuvin 292 1% BYK333 0.4% Silane coupling agent KH550 1.4%

Test example: Use a dispensing machine to coat the light-shielding compositions provided in Examples 1 to 5 on the glass substrate (coating pressure is 0.05MPa, coating temperature is 45°C), and an LED light source with a wavelength of 405nm is used , perform photocuring treatment with an energy of 800 MJ/cm2 to prepare a light-shielding film material 1 with a thickness of 100um, and perform photocuring treatment with an energy of 1350 MJ/cm2 to prepare a light-shielding film material 2 with a thickness of 400um.

The properties of the light-shielding compositions provided in Examples 1 to 5, as well as the light-shielding compositions light-shielding film material 1 and light-shielding film material 2 prepared from these light-shielding compositions were tested. The specific test items and test methods are as follows:

Viscosity: The viscosity of the light-shielding composition was measured using a Polyfly rotational viscometer, with a 34# rotor and viscosity measurement at 25°C; Optical density OD value: For light-shielding film materials, use a UV spectrophotometer to test the average light transmittance T% under a wavelength light source of 400nm to 700nm. The calculation formula for the OD value is as follows: OD=log10 (1/T%), OD The larger the value, the better the light-shielding property. Generally, the OD value is required to be >0.5; Curing degree: Use an infrared spectrometer to test the double bond conversion rate of the light-shielding composition before and after curing. The curing degree is required to be >90%; Resistance value: Use a surface resistance meter to test the resistance value of the shading film material. The resistance value represents the insulation performance of the shading material. Generally, the higher the better, the requirement is greater than 1012; Hardness: Use Shore Hardness Tester A or D to test the hardness of the light-shielding film material. It is required to measure the corresponding hardness when the film thickness is 4mm. In order to meet the test thickness, multiple layers of light-shielding film materials are generally superimposed. The hardness (D>A , if they are of the same level, the larger the value, the higher the hardness); Tensile strength: Use a universal tensile testing machine to test the tensile strength of the light-shielding film material (sensor 50N pressure, pull-up speed 50mm/min); Adhesion: Use a universal tensile testing machine to test the adhesion of the light-shielding film material. The tensile direction is 90° to the base material (sensor pressure 50N, lifting speed 50mm/min); Aging performance: The high and low temperature alternating heat and humidity test chamber is used to test the light-shielding film material, ~40℃, 500h; 85℃, 500h; more than 500 cycles of hot and cold shock from ~40℃ to 85℃, the color and OD value after the test are required No change; High temperature and high humidity resistance: 85℃, 85%RH, more than 500h, no change in color and OD value after testing is required; Solvent resistance: Alcohol with a purity of more than 95%, 500g load, wipe 100 times, no discoloration or damage; Water absorption rate: film thickness * 5cm * 5cm, soaked in pure water at room temperature for 24 hours, weigh the weight change before and after soaking, the requirement is <1%. The formula for calculating water absorption is as follows: water absorption = (m2～m1)/m1*100%; m1: the weight of the light-shielding film material before soaking; m2: the weight of the light-shielding film material after soaking; moisture permeability: test using a moisture-permeable cup , Conditions: 65℃*95%RH*24h, desiccant (anhydrous calcium chloride), requirement <100g/m2. The calculation formula of moisture permeability is as follows: moisture permeability = (m2～m1)/S; m1: the weight of the desiccant before the moisture permeability test; m2: the weight of the desiccant after the moisture permeability test; S: the diameter of the moisture permeability cup (diameter is 10cm);

Among them, the performance parameters of the light-shielding film material 1 (referred to as 1#) and the light-shielding film material 2 (referred to as 2#) prepared from Examples 1 to 5 respectively are as shown in Table 6: Table 6 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Viscosity cps 2200 2500 2700 2000 3000 2350 1#OD value 1 1.3 1.2 0.8 1.5 1.4 2#OD value 2.5 3.2 2.8 2.5 4 3.5 1# solidification degree 98% 97% 98% 97% 98% 97% 2# solidification degree 93% 93% 95% 95% 94% 92% 1# resistance Ω 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 2# resistor Ω 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 1# hardness 80HD 80HA 60HD 95HA 52HD 58HD 2# hardness 80HD 80HA 60HD 95HA 52HD 58HD 1# tensile strength MPa 10 14 12 14 11 12 2# tensile strength MPa 10 14 12 14 11 12 1# adhesion N/cm 2.4 3.5 3.2 4.2 4 3.8 2# adhesion N/cm 2.4 3.5 3.2 4.2 4 3.8 1#Aging performance No cracking, fading or degumming, OD value is 1 No cracking, fading or degumming, OD value is 1.3 No cracking, fading or degumming, OD value is 1.2 No cracking, fading or degumming, OD value is 0.8 No cracking, fading or degumming, OD value is 1.5 No cracking, fading or degumming, OD value is 1.4 2#Aging performance No cracking, fading or degumming, OD value is 2.5 No cracking, fading or degumming, OD value is 3.2 No cracking, fading or degumming, OD value is 2.8 No cracking, fading or degumming, OD value is 2.5 No cracking, fading or degumming, OD value is 4 No cracking, fading or degumming, OD value is 3.5 1# High temperature and humidity resistance No cracking, fading or degumming, OD value is 1 No cracking, fading or degumming, OD value is 1.3 No cracking, fading or degumming, OD value is 1.2 No cracking, fading or degumming, OD value is 0.8 No cracking, fading or degumming, OD value is 1.5 No cracking, fading or degumming, OD value is 1.4 2# High temperature and humidity resistance No cracking, fading or degumming, OD value is 2.5 No cracking, fading or degumming, OD value is 3.2 No cracking, fading or degumming, OD value is 2.8 No cracking, fading or degumming, OD value is 2.5 No cracking, fading or degumming, OD value is 4 No cracking, fading or degumming, OD value is 3.5 1# solvent resistance No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming 2# Solvent resistance No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming No cracking, fading or degumming 1# water absorption rate 0.5% 0.2% 0.4% 0.3% 0.1% 0.1% 2# water absorption rate 0.1% 0.1% 0.1% 0.1% 0.1% 0.1% 1# moisture permeability g/m ² 30 20 25 20 15 18 2# moisture permeability g/m ² 5 5 5 5 3 3

As can be seen from Table 6, the light-shielding compositions prepared in the embodiments of the present invention all exhibit excellent comprehensive properties. In particular, when the thickness of the light-shielding film material is 100 μm, they still have an optical density OD value of at least 0.8, and, in light-shielding When the thickness of the film material is 400μm, it still has a curing degree of at least 93%, which effectively solves the problem of current light-shielding materials being unable to have a higher OD value at a thinner thickness, and being unable to have a higher OD value at a thicker thickness. The technical problem of degree of curing.

The above description is only to facilitate those skilled in the art to understand the technical solutions of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

without

without

Claims (10)

A light-shielding composition, characterized in that the light-shielding composition includes the following components in mass percentage: Polyurethane acrylate oligomer 40% to 60%, acrylate monomer 30% to 40%, photoinitiator 3% to 10%, additive 0.3% to 5.5%, metal complex dye 0.5% to 1.5%; Wherein, the metal complex dye includes at least two of blue dye, red dye, and purple dye; and/or, The absorption wavelength of the metal complex dye is greater than 400 nm. The light-shielding composition of claim 1, wherein the blue dye includes at least one of solvent blue 5 and solvent blue 70; and/or, The red dye includes at least one of solvent red 8, solvent red 122, solvent red 119, solvent red 132, and solvent red 124; and/or, The purple dye includes at least one of Solvent Violet 58 and Triamet Violet 5R. The light-shielding composition according to claim 1, wherein the polyurethane acrylate oligomer has a functionality of 2 to 3 and a weight average molecular weight of 1500 to 6000; and/or, The polyurethane acrylate oligomer includes at least one of polyether polyurethane, polyester polyurethane, polycarbonate polyurethane, and polybutadiene polyurethane. The light-shielding composition according to any one of claims 1 to 3, wherein the acrylate monomer includes at least one of monofunctional acrylates and at least one of trifunctional acrylates; and/or, The mass percentage of the trifunctional acrylate in the light-shielding composition is 1% to 5%. The light-shielding composition of claim 3, wherein the monofunctional acrylate includes at least one of dodecyl acrylate, isobornyl acrylate, isooctyl acrylate, tetrahydrofuran acrylate, and acrylomorpholine; and/ or, The trifunctional acrylate includes at least one of tris(hydroxymethyl)propane triacrylate and pentaerythritol triacrylate. The light-shielding composition according to any one of claims 1 to 5, wherein the photoinitiator includes photoinitiator TPO, photoinitiator 819, photoinitiator 907, photoinitiator ITX, photoinitiator 369, At least one of the photoinitiators DETX. The light-shielding composition of claim 6, wherein the photoinitiator includes at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator DETX. The light-shielding composition according to any one of claims 1 to 7, wherein the additive includes: at least one of a silane coupling agent, a leveling agent, and an ultraviolet agent; The mass percentage of the silane coupling agent in the light-shielding composition is 0.1% to 3%; The mass percentage of the leveling agent in the light-shielding composition is 0.1% to 1.5%; and The quality percentage of the ultraviolet agent in the light-shielding composition is 0.1% to 1%. A method for preparing a light-shielding composition, characterized in that the light-shielding composition is as shown in any one of claims 1 to 8; the preparation method of the light-shielding composition includes: In a light-proof environment, stir the acrylate monomer, photoinitiator and additives evenly to form a first mixture; and Polyurethane acrylate oligomer and metal complex dye are added to the first mixture and stirred evenly. After pressure filtration, the photocurable light-shielding composition is obtained. A display device, characterized in that: the display device has a light-shielding film material, wherein the light-shielding film material is prepared by photocuring the light-shielding composition as described in any one of claims 1 to 8, or, Prepared by the preparation method described in claim 9.