KR20230103974A - Sunscreening composition and method for preparing same, and display device - Google Patents

Abstract

The present invention discloses a light-shielding composition, a manufacturing method thereof, and a display device, and belongs to the field of display technology. The light-shielding composition contains components according to the following mass percentages, that is, polyurethane acrylate oligomer 40% - 60%, acrylate monomer 30% - 40%, photoinitiator 3% - 10%, additive 0.3% - 5.5%, metal complex dye 0.5% - 1.5%; Here, the metal complex dye includes at least two kinds of blue dye, red dye, and purple dye, and the absorption wavelength of the metal complex dye exceeds 400 nm. The light-shielding material formed by curing can exhibit excellent overall performance by the joint action of each component according to a reasonable mixing ratio. The overall performance of the light-shielding material includes, but is not limited to, high curing degree, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and high humidity resistance, and the like.

Description

Light-shielding composition and its manufacturing method, display device

The present invention discloses a light-shielding composition, a manufacturing method thereof, and a display device, and belongs to the field of display technology.

The borderless display device does not install a module border on the side of the screen, and in order to prevent backlight from penetrating the side surface of the upper and lower glass substrates and the slit between the upper and lower glass substrates to prevent light leakage, generally, the screen can be operated It is a display device that realizes a light blocking effect by applying a side edge blocking material to a border area excluding the area.

At present, side edge shading materials are generally UV-curable shading materials, and these uv-curable shading materials include a black pigment and an optional black dye, wherein the black pigment may be carbon black, black. Black color is enhanced through the combination of pigment or black pigment and black dye.

However, black pigments such as carbon black are difficult to be uniformly dispersed in the light-shielding material system, and even a dispersant must be added to the system to uniformly disperse the black pigment, which not only affects the overall performance of the light-shielding material, but also It can also affect the degree of hardening of the material system.

The present invention discloses a light-shielding composition, a manufacturing method thereof, and a display device, and belongs to the field of display technology.

The present invention includes the technical means described below in detail. in other words,

In one aspect, the present invention provides a light-shielding composition, wherein the light-shielding composition contains components according to the following mass percentages, that is, polyurethane acrylate oligomer 40% - 60%, acrylate monomer 30% - 40% , photoinitiator 3% - 10%, additive 0.3% - 5.5%, metal complex dye 0.5% - 1.5%;

Here, the metal complex dye includes at least two of a blue dye, a red dye, and a purple dye; and/or

The absorption wavelength of the metal complex dye exceeds 400 nm.

In some possible embodiments, the blue dye comprises 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 Purple 58 and Triamet Violet 5R.

In some possible embodiments, the functionality of the polyurethane acrylate oligomer is 2 - 3, the weight average molecular weight is 1500 - 6000; and/or

The polyurethane acrylate oligomer includes at least one of polyether-based polyurethane, polyester-based polyurethane, polycarbonate-based polyurethane, and polybutadiene-based polyurethane.

In some possible embodiments, the acrylate monomers include at least one of monofunctional acrylates and at least one of trifunctional acrylates; and/or

The mass percentage of the trifunctional acrylate with respect to the light-shielding composition is 1% - 5%.

In some possible embodiments, the monofunctional acrylate includes at least one of dodecyl acrylate, isobornyl acrylate, isooctyl acrylate, tetrahydrofurfuryl acrylate, and acryloylmorpholine; and/or

The trifunctional acrylate includes at least one of trimethylolpropane triacrylate and pentaerythritol triacrylate.

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

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

In some possible embodiments, the additive includes at least one of a silane coupling agent, a leveling agent, and an ultraviolet absorber;

The mass percentage of the silane coupling agent with respect to the light-shielding composition is 0.1% - 3%;

The mass percentage of the leveling agent relative to the light-shielding composition is 0.1% - 1.5%;

A mass percentage of the ultraviolet absorber relative to the light-shielding composition is 0.1% - 1%.

In another aspect, the present invention further provides a method for producing a light-shielding composition, wherein the light-shielding composition is the light-shielding composition according to any one of the above;

The method for preparing the light-shielding composition includes uniformly stirring an acrylate monomer, a photoinitiator, and an additive in an environment where light does not reach, to form a first mixture;

Stirring a polyurethane acrylate oligomer and a metal complex dye uniformly with the said 1st mixture, passing through pressure filtration, and obtaining the said light-shielding composition; includes

In another aspect, the present invention further provides a display device, wherein the display device includes a light-shielding material, the light-shielding material being prepared by photocuring a light-shielding composition;

The light-shielding composition is any one of the above-described light-shielding compositions or a light-shielding composition prepared by the above-described manufacturing method.

Advantageous effects of the technical means provided by the embodiments of the present invention include at least the effects described below. in other words,

The photocurable light-shielding composition provided by an embodiment of the present invention can be used to prepare a light-shielding material for a display device, wherein the light-shielding composition includes a metal complex dye, and the metal complex dye is polyurethane acrylate Since both the oligomer and the acrylate monomer have good compatibility, the metal complex dye can be sufficiently uniformly dispersed in the light-shielding composition without using a dispersant, and a color with high uniformity and strong durability can be revealed. can The metal complex dye includes at least two of a blue dye, a red dye, and a purple dye, and the combination of these dyes causes the color of the light-shielding material to be black-blue or blue-violet, so that the light-shielding material has a relatively high optical density. let it have

In addition, the metal complex dye has further characteristics described below. That is, it does not absorb ultraviolet wavelength light, but can absorb visible light with a wavelength exceeding 400 nm (without affecting the curing performance of the light-shielding composition while satisfying the external color), high dispersion power, and permeability , weather resistance, and color fastness. Therefore, the metal complex dye does not affect the curing process of the light-shielding composition. According to the study, it was found that the cured light-shielding material exhibited excellent overall performance due to the joint action of polyurethane acrylate oligomer, acrylate monomer, photoinitiator, additive and metal complex dye according to a reasonable mixing ratio. The overall performance of the light-shielding material includes, but is not limited to, high curing degree, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and high humidity resistance, and the like.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in more detail in order to further clarify the technical means and advantages of the present invention.

As the screens of electronic devices such as smartphones, computers, and televisions gradually develop into borderless full-cover screens, more and more borderless display devices are widely applied, and module borders are installed on the side of the screen of the borderless display device. Because he doesn't, there are no blockages on his sides. Therefore, the backlight transmits through the slit between the side surfaces of the upper and lower glass substrates and the upper and lower glass substrates, and light leakage occurs. In order to prevent light leakage caused by transmission of the backlight through the side surfaces of the upper and lower glass substrates and through the slits between the two, the light blocking effect is generally achieved by applying a side edge blocking material to the border area excluding the operable area of the screen. .

The side edge shielding material is preferably a side edge shielding material having at least the performance described below. That is, high optical density (OD), sufficient hardness and tensile length, strong adhesion, peelability (convenient for re-repair), water vapor resistance, high temperature and high humidity resistance, and resistance to high and low temperature impact. In addition, since the side edge blocking material is required to be immediately curable when the adhesive is applied in the production process of the display device, the side edge blocking material is generally an ultraviolet curable light blocking material.

Currently, a conventional UV-curable shading material generally includes a black pigment and an optional black dye, where the black pigment may be carbon black, or a combination of black pigment or a black pigment and a black dye. Black color is enhanced through mixing.

However, black pigments such as carbon black are difficult to be uniformly dispersed in the light-shielding material system, and even a dispersant must be added to the system to uniformly disperse the black pigment, which not only affects the curing performance of the system, but also affects the curing performance. It can also affect the overall performance of the light-shielding material formed by

An embodiment of the present invention provides a light-shielding composition, wherein the light-shielding composition contains components according to the following mass percentages, that is, polyurethane acrylate oligomer 40% - 60%, acrylate monomer 30% - 40%, photoinitiator 3 % - 10%, additives 0.3% - 5.5%, metal complex dyes 0.5% - 1.5%.

Here, the metal complex dye includes at least two of a blue dye, a red dye, and a purple dye, and/or, the absorption wavelength of the metal complex dye exceeds 400 nm.

The light-shielding composition provided by an embodiment of the present invention can be used to prepare a light-shielding material for light-shielding of a display device, wherein the light-shielding composition includes a metal complex dye, and the metal complex dye includes a polyurethane acrylate oligomer and Since it has good compatibility with the acrylate monomer and both, the metal complex dye can be sufficiently uniformly dispersed in the light-shielding composition without using a dispersant, and a color with high uniformity and strong durability can be revealed. . The metal complex dye includes at least two of a blue dye, a red dye, and a purple dye, and the combination of these dyes causes the color of the light-shielding material to be black-blue or blue-violet, so that the light-shielding material has a relatively high optical density. let it have

In addition, the metal complex dye has further characteristics described below. That is, it does not absorb light of an ultraviolet wavelength, but can absorb light with a wavelength exceeding 400 nm, high dispersion power, permeability, weather resistance, and color fastness. Therefore, the metal complex dye does not affect the curing process of the light-shielding composition. According to the study, it was found that the light-shielding material formed by curing the light-shielding composition exhibited excellent overall performance by the joint action of polyurethane acrylate oligomer, acrylate monomer, photoinitiator, additive and metal complex dye according to a reasonable mixing ratio. . The overall performance of the light-shielding material includes, but is not limited to, high curing degree, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and high humidity resistance, and the like.

In an embodiment of the present invention, the mass percentage of the metal complex dye relative to the light-shielding composition is 0.5% - 1.5%, which is 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2% , 1.3%, 1.4%, 1.5%, etc., but are not limited thereto.

The metal complex dye is capable of transmitting ultraviolet light (eg, 300 nm to 420 nm LED light), but is preferably not capable of transmitting visible light. Blue dyes, red dyes, and purple dyes that satisfy the above requirements are as described below, respectively.

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

For example, red dyes are Solvent Red 8, Solvent Red 122, Solvent Red 119, Solvent Red 132, Solvent Red 124 ) includes at least one of them.

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

By the joint action of a dye in which at least two of these blue dyes, red dyes, and purple dyes are combined and other components, the light-shielding composition is cured, and the light-shielding material formed through curing produces a desired blue-black or blue-violet color. It can be revealed and have a high OD value.

For example, the metal complex dye may be a combination of any two of blue dye, red dye, and purple dye, or a combination of three of blue dye, red dye, and purple dye. Depending on the color desired to be revealed, the specific components of the metal complex dye and the content of each component may be adjusted.

In an embodiment of the present invention, the mass percentage of the polyurethane acrylate oligomer with respect to the light-shielding composition is 40% - 60%, which is 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, and the like.

A curing system composed of a polyurethane acrylate oligomer, an acrylate monomer and a photoinitiator can be cured by UV light to produce a polymer network, and the curing system has a relatively fast curing speed.

In some examples, the polyurethane acrylate oligomer has a functionality of 2 - 3 and a weight average molecular weight of 1500 - 6000; And / or polyurethane acrylate oligomer is polyether-based polyurethane (advantageous for improving the elasticity and flexibility of the adhesive film), polyester-based polyurethane (excellent in water resistance, high temperature and high humidity resistance of the adhesive film, and advantageous for improving strength ), polycarbonate-based polyurethane (advantageous for improving the adhesion between the adhesive film and the base), polybutadiene-based polyurethane (advantageous for reducing moisture permeability and water absorption), and, for example, polyester It contains at least 1 sort(s) of type polyurethane and a polybutadiene type polyurethane.

For example, the molecular weight of the polyurethane acrylate oligomer may be 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000, and a molecular weight range made up of any two of these values.

For example, polyether-based polyurethane is prepared from a polyether polyol having a molar ratio of 1:2:2 or 1:3:3, diisocyanate and hydroxyacrylate, and the molecular weight of the polyether polyol is 1000 - 5000 am.

For example, polycarbonate-based polyurethane is prepared from polycarbonate diol, diisocyanate, and hydroxyacrylate in a molar ratio of 1:2:2, and the molecular weight of the polycarbonate diol is 500 to 2000.

For example, the polyester-based polyurethane is prepared from branched polyester polyol, diisocyanate and hydroxyacrylate having a molar ratio of 1: 2: 2 or 1: 3: 3, and the branched polyester polyol The molecular weight is 500 - 2000.

For example, the polybutadiene-based polyurethane is prepared from polybutadiene polyol, diisocyanate and hydroxyacrylate having a molar ratio of 1:2:2 or 1:3:3, and the molecular weight of the polybutadiene polyol is 1000 - It is 3000.

For example, diisocyanates include toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), hexamethylene diisocyanate (HDI), lysine diisocyanate ( LDI ); and the like, but are not limited thereto.

For example, hydroxyacrylate includes hydroxyethyl (methyl) acrylate, hydroxypropyl (methyl) acrylate, polyethylene glycol monomethacrylate, phenyl glycidyl ether acrylate, etc. However, it is not limited thereto.

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

In some examples, the acrylate monomers applied to the embodiments of the present invention include at least one of monofunctional acrylates and at least one of trifunctional acrylates.

In some instances, monofunctional acrylates are dodecylacrylate (LA), isobornylacrylate (IBOA), isooctylacrylate (2-EHA), tetrahydrofurfurylacrylate (THFA), 4-acrylo and at least one of ilmorpholine (ACMO).

The trifunctional acrylate includes at least one of trimethylolpropane triacrylate (TMPTA) and pentaerythritol triacrylate (PET3A), and the mass percentage occupied by the trifunctional acrylate in the light-shielding composition is 1 %-5%, and for example, the mass percentage of the trifunctional acrylate in the light-shielding composition is 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5 %, etc.

In some instances, the monofunctional acrylate includes at least one of dodecyl acrylate, isooctyl acrylate, and 4-acryloylmorpholine.

In some examples, the monofunctional acrylate includes at least two of dodecylacrylate, isooctylacrylate, and 4-acryloylmorpholine.

When dodecyl acrylate is included in the monofunctional acrylate, the mass percentage occupied by dodecyl acrylate in the monofunctional acrylate is greater than or equal to 20%, and when isooctyl acrylate is included in the monofunctional acrylate, iso-octyl acrylate is included. The mass percentage occupied by octyl acrylate in the monofunctional acrylate is greater than or equal to 10%, and when the monofunctional acrylate contains acryloylmorpholine, the mass percentage occupied by acryloylmorpholine in the monofunctional acrylate is less than 30%.

The acrylate monomer is a composition of the above-described monofunctional acrylate and trifunctional acrylate, and the mass percentage of the trifunctional acrylate in the light-shielding composition is 1% to 5%, so that this acrylate By the joint action of the monomer and the polyurethane acrylate oligomer, the overall performance described below of the light-shielding material can be further optimized. That is, high curing degree, high optical density, sufficient hardness and tensile length, strong adhesion, peelability, water vapor resistance, solvent resistance, aging resistance, high temperature and high humidity resistance, etc.

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

In some examples, the photoinitiator applied in the embodiments of the present invention is photoinitiator TPO (diphenyl (2,4,6-trimethylbenzoyl) phosphate), photoinitiator 819 (phenylbis (2,4,6-trimethylbenzoyl) phosphate) ), photoinitiator 907 (2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone), photoinitiator ITX (2-isopropylthioxanthone), photoinitiator 369 (2-benzyl-2-dimethylamino-1-(4-morpholino-phenyl)butanone), photoinitiator DETX (2,4-diethylthioxanthen-9-one), but Not limited to this.

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

In some examples, the photoinitiator includes at least photoinitiator TPO and at least one of photoinitiator 819 and photoinitiator DETX, that is, a combination of at least photoinitiator TPO+photoinitiator 819, a combination of photoinitiator TPO+photoinitiator DETX, or a photoinitiator A combination of TPO + photoinitiator 819 + photoinitiator DETX.

When the photoinitiator contains photoinitiator TPO, the mass percentage occupied by photoinitiator TPO in the photoinitiator is at least 30%; When the photoinitiator contains photoinitiator 819, the mass percentage occupied by photoinitiator 819 in the photoinitiator is less than or equal to 35%; When the photoinitiator includes the photoinitiator DETX, the mass percentage occupied by the photoinitiator DETX in the photoinitiator is less than or equal to 35%.

By setting the photoinitiator system as described above, a better photoinitiation effect for the system of the polyurethane acrylate oligomer and the acrylate monomer is obtained, applied to curing of LED light, and advantageous in improving the curing speed and degree of curing of the system. Thus, the light-shielding composition can satisfy the requirements of the process and curing performance so that the adhesive is quickly cured immediately when the adhesive is applied.

In some examples, the additive in the light-shielding composition provided by the embodiment of the present invention includes at least one of a silane coupling agent, a leveling agent, and a UV absorber.

Here, the mass percentage of the silane coupling agent with respect to the light-shielding composition is 0.1% - 3%, for example, 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%, etc.

For example, the silane coupling agent is γ-aminopropyltriethoxysilane (silane coupling agent KH-550), γ-(2,3-glycidyloxy)propyltrimethoxysilane (silane coupling agent KH-560 ), γ-methacryloyloxypropyltrimethoxysilane (silane coupling agent KH-570), 3-mercaptopropyltriethoxysilane (silane coupling agent KH-580), but is not limited thereto. don't The light-shielding material cured based on the light-shielding composition may improve adhesion or adhesion of the light-shielding material to the base material through the silane coupling agent.

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

For example, organosilicon leveling agents include, but are not limited to, organosilicon leveling agents, acrylic acid leveling agents, and more particularly, organosilicon leveling agents include, but are not limited to, BYK333, BYK331, BYK346, and ETA-735. The acrylic acid leveling agent includes, but is not limited to, BYK354, BYK358, and BYK361.

By using the leveling agent, it is advantageous to form the light-shielding composition into a light-shielding material in the form of a flat, smooth, and uniform film, and it is advantageous to optimize the performance of the light-shielding material, such as hardness and tensile length.

The mass percentage of the UV absorber relative to the light-shielding composition is 0.1% - 1%, for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1 %, etc.

For example, the UV absorber may be at least one of Tinuvin 292, Tinuvin 1130, Tinuvin 123, Tinuvin 329, Tinuvin 405, Tinuvin 770, and Tinuvin 622.

Not only can the storage stability of the light-shielding composition system be improved through the UV absorber, but also it is advantageous to improve the overall performance of the light-shielding material formed of the light-shielding composition by the joint action of the UV absorber and other components.

As can be seen from the foregoing, according to the blending method of the light-shielding composition provided by the embodiment of the present invention, when the light-shielding composition is cured to form a light-shielding material, the light-shielding material has a relatively thin thickness. It can be satisfied to obtain a relatively high OD value, and also the curing performance in a thick thickness can be more satisfactory, and applied to screens such as computers or televisions, the thickness of the light-shielding material can reach 200 μm or more. The curing degree of the light-shielding material is relatively high, and in addition, the hardness, tensile length, absorption rate, and moisture permeability of the light-shielding material are effectively improved.

The light-shielding composition provided by the embodiment of the present invention is cured through the method described below to form a film. in other words,

Coat the light-shielding composition on a base material (eg, glass) using an adhesive dispenser (coating pressure is, for example, 0.05 MPa, and coating temperature is 45 ° C - 50 ° C), and the wavelength is 365 nm - Using a 405 nm LED light, the light-shielding composition is cured with an energy of 800 MJ/cm ² - 1500 MJ/cm ² to cure the light-shielding composition to form a film, and the light-shielding material produced is a light-shielding film material. Also referred to as, the thickness may be 100 μm - 500 μm.

In another aspect, an embodiment of the present invention further provides a method for manufacturing a light-shielding composition, wherein the light-shielding composition is the light-shielding composition according to any one of the above-described compositions.

The method for preparing the light-shielding composition includes uniformly stirring an acrylate monomer, a photoinitiator, and an additive in an environment where light does not reach, to form a first mixture.

For example, the acrylate monomer, the photoinitiator and the additives are uniformly stirred at 40° C. to 45° C. so that the photoinitiator is completely dissolved. In the case of stirring, the frequency of stirring can be 30 HZ - 35 HZ.

A polyurethane acrylate oligomer and a metal complex dye are stirred uniformly with a 1st mixture, and the composition for light-shielding is obtained through pressure filtration.

For example, a polyurethane acrylate oligomer and a metal complex dye are added to the first mixture and stirred uniformly.

For example, the polyurethane acrylate oligomer is preheated to 40 ° C - 45 ° C and then added to the first mixture and stirred. In order to ensure that the light-shielding composition is uniformly stirred, the stirring time is 2 to 3 hours. can

The pressure at the time of pressure filtration may be less than or equal to 0.1 Mpa, and the temperature at the time of filtration may be 40 ° C - 45 ° C.

The light-shielding composition provided by the embodiment of the present invention forms a light-shielding material in the form of a film through photocuring.

In another aspect, an embodiment of the present invention further provides a display device, wherein the display device is provided with a light-shielding material, and the light-shielding material is manufactured by photocuring a light-shielding composition. Here, the light-shielding composition is any one kind of light-shielding composition according to an embodiment of the present invention, or a light-shielding composition prepared by a method for manufacturing a light-shielding composition according to an embodiment of the present invention.

For example, the display device is a display panel, the display panel includes an upper base and a lower base facing each other, and the light-shielding composition is applied to the sides of the upper and lower bases and to the slits between the upper and lower bases. to coat

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

Hereinafter, preferred embodiments of the present invention will be described in more detail. Although preferred embodiments of the present invention have been described below, it should be understood that the present invention is not limited to the embodiments described herein and can be implemented in various forms. For specific techniques or conditions, unless otherwise specified in the present embodiment, techniques or conditions described in literature within the field to which the present invention belongs or implemented according to product specifications. Reagents or measurement instruments used may all be general products obtained through the market unless the manufacturer is specified.

Example 1-Example 6

All of the compositions for light-shielding according to Examples 1 to 6 below are manufactured by the following method. in other words,

In an environment without light, the acrylate monomer, photoinitiator and additives are put into a reaction kettle, the temperature is raised to 45° C., and stirring is started at a frequency of 35 HZ until the photoinitiator is completely dissolved. Subsequently, the polyurethane acrylate oligomer preliminarily heated to 45° C. was added to the reaction kettle, and then the metal complex dye was added to the reaction kettle, followed by stirring for 3 h until the light-shielding composition system was uniformly dissolved. Then, pressure filtration is performed on the light-shielding composition system (the pressure intensity is 0.1 MPA and the temperature is 40° C.), and finally a homogeneous light-shielding composition is obtained.

Polyurethane acrylate oligomers related to the following Examples 1 to 6 are as described below. in other words,

The bifunctional polyester polyurethane acrylate is prepared from polyester diol, isophorone diisocyanate and hydroxyethyl acrylate having a molar ratio of 1: 2: 2, and the weight average of the bifunctional polyester polyurethane acrylate molecular weight is 1600;

The bifunctional polybutadiene polyurethane acrylate is prepared from polybutadiene diol, isophorone diisocyanate and hydroxyethyl acrylate in a molar ratio of 1: 2: 2, and the weight average of the bifunctional polybutadiene polyurethane acrylate molecular weight is 2200;

The bifunctional polyether polyurethane acrylate is prepared from polyetherdiol, toluene diisocyanate and polyethylene glycol monomethacrylate in a molar ratio of 1: 2: 2, and the weight average of the bifunctional polyether polyurethane acrylate molecular weight is 2600;

The bifunctional polycarbonate polyurethane acrylate is prepared from polycarbonate diol, toluene diisocyanate and polyethylene glycol monomethacrylate in a molar ratio of 1: 2: 2, and the weight average of the bifunctional polycarbonate polyurethane acrylate molecular weight is 1600;

Trifunctional polyester polyurethane acrylate is prepared from polyester triol, isophorone diisocyanate and polyethylene glycol monomethacrylate in a molar ratio of 1: 3: 3, and is a mixture of trifunctional polyester polyurethane acrylate. the weight average molecular weight is 3000;

The trifunctional polybutadiene-based polyurethane acrylate is prepared from polybutadiene triol, toluene diisocyanate and hydroxypropyl acrylate having a molar ratio of 1: 3: 3, and the weight average of the trifunctional polybutadiene-based polyurethane acrylate molecular weight is 4000;

The trifunctional polyether polyurethane acrylate is prepared from polyether triol, isophorone diisocyanate and hydroxypropyl acrylate in a molar ratio of 1: 3: 3, and the weight of the trifunctional polyether polyurethane acrylate The average molecular weight is 4500.

The formulation methods of the light-shielding compositions provided in Example 1, Example 2, Example 3, Example 4, Example 5, and Example 6 are shown in Table 1, Table 2, Table 3, Table 4, Table 5, and Table 5 below. 6 respectively.

item raw ingredient mass percentage oligomer Bifunctional polyester polyurethane acrylate 60% acrylate monomer Dodecyl Acrylate LA 6% Isooctylacrylate 2-EHA 8% Isobornyl Acrylate IBOA 15% Trimethylolpropane triacrylate TMPTA 3% photoinitiator Photoinitiator TPO 2% photoinitiator 819 One% photoinitiator 907 2% metal complex dyes Solvent Red 8 0.2% Solvent Blue 5 0.2% Triamet Violet 5R 0.2% additive UV absorber Tinuvin 292 0.1% Leveringsee BYK333 0.3% Silane Coupling Agent KH570 2%

item raw ingredient mass percentage oligomer Bifunctional polybutadiene polyurethane acrylate 52% acrylate monomer Acryloylmorpholine ACMO 3% Isooctylacrylate 2-EHA 8% Isobornyl Acrylate IBOA 25% Pentaerythritol Triacrylate PET3A 3% photoinitiator Photoinitiator TPO 2.5% Photoinitiator DETX One% photoinitiator 907 2.5% metal complex dyes Solvent Red 124 0.4% Solvent Blue 5 0.2% Triamet Violet 5R 0.4% additive Tinuvin 292 0.1% BYK333 silicone leveling agent 0.4% Silane Coupling Agent KH580 1.5%

item raw ingredient mass percentage oligomer Bifunctional polyether polyurethane acrylate 60% acrylate monomer Acryloylmorpholine ACMO 3% Tetrahydrofurfurylacrylate THFA 3% Dodecyl 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% additive Tinuvin 292 0.1% BYK333 0.4% Silane Coupling Agent KH550 0.7%

item raw ingredient mass percentage oligomer Bifunctional polyether polyurethane acrylate 25% Trifunctional polyester polyurethane acrylate 30% acrylate monomer Acryloylmorpholine ACMO 7.5% Tetrahydrofurfurylacrylate THFA 7.5% Isooctylacrylate 2-EHA 15% Trimethylolpropane triacrylate TMPTA 5% photoinitiator Photoinitiator TPO 3% Photoinitiator DETX 2% photoinitiator 369 3% metal complex dyes Solvent Red 8 0.1% Solvent Blue 70 0.2% Triamet Violet 5R 0.2% additive Tinuvin 292 0.1% BYK 333 0.4% Silane Coupling Agent KH550 One%

item raw ingredient mass percentage oligomer Trifunctional polybutadiene-based polyurethane acrylate 30% Trifunctional polyester polyurethane acrylate 25% acrylate monomer Isooctylacrylate 2-EHA 5% Acryloylmorpholine ACMO 8.5% Isobornyl Acrylate IBOA 20% Trimethylolpropane triacrylate TMPTA 1.5% photoinitiator Photoinitiator TPO 2% Photoinitiator DETX 2% photoinitiator 369 2% metal complex dyes Solvent Red 132 0.4% Solvent Blue 70 0.4% Triamet Violet 5R 0.4% additive Tinuvin 292 One% BYK 333 0.4% Silane Coupling Agent KH550 1.4%

item raw ingredient mass percentage oligomer Bifunctional polycarbonate polyurethane acrylate 30% Trifunctional polyether polyurethane acrylate 30% acrylate monomer Isooctylacrylate 2-EHA 5% Acryloylmorpholine ACMO 8.5% Isobornyl Acrylate IBOA 15% Trimethylolpropane triacrylate TMPTA 1.5% photoinitiator Photoinitiator TPO 2% Photoinitiator DETX 2% photoinitiator 369 2% metal complex dyes Solvent Red 132 0.4% Solvent Blue 70 0.4% Triamet Violet 5R 0.4% additive Tinuvin 292 One% BYK 333 0.4% Silane Coupling Agent KH550 1.4%

test example

Using an adhesive dispenser, the light-shielding composition provided in Examples 1 to 6 was coated on a glass base material (coating pressure was 0.05 MPa, coating temperature was 45 ° C), and an LED light having a wavelength of 405 nm was used. light-shielding film material 1 having a thickness of 100 um by performing photo-curing treatment with an energy of 800 MJ/cm ² , and performing photo-curing treatment with an energy of 1350 MJ/cm ² to obtain a light-shielding film having a thickness of 400 um Prepare film material 2.

Performance tests were performed on the light-shielding compositions provided in Examples 1 to 6, and light-shielding film material 1 and light-shielding film material 2 prepared by these light-shielding compositions. Specific test items and test methods are as follows. As described. in other words,

Viscosity: The viscosity of the light-shielding composition is measured using a Brookfield rotational viscometer, and the viscosity is measured at 25° C. with a 34# rotor.

Optical density OD value : When the average light transmittance T% of the light-shielding film material is measured with a light having a wavelength of 400 nm - 700 nm using an ultraviolet spectrophotometer, the formula for calculating the OD value is as described below. in other words,

OD=log ₁₀ (1/T%), which indicates that the higher the OD value, the better the light-shielding property, and generally requires an OD value of >0.5.

Degree of curing: Using an infrared spectrometer, a test was conducted on the conversion rate of the double competition before and after curing of the light-shielding composition, and the degree of curing was required to be >90%.

Resistance value: The resistance value of the light-shielding film material is tested using a surface resistance meter. The resistance value characterizes the insulation performance of the light-shielding material. Generally, the higher the better, the higher the value exceeds 10 ¹² ask to do

Hardness: When the hardness of the light-shielding film material is tested using Shore hardness tester A or D, it is required to measure the corresponding hardness when the film thickness is 4 mm, and the measured thickness is satisfied. To do this, generally, a plurality of layers of light-shielding film materials are laminated, and the hardness (D>A, in the case of the same level, the higher the value, the higher the hardness) is measured.

Tensile strength: The tensile strength of the light-shielding film material is measured using a universal tensile tester (50 N pressure sensor, lifting speed is 50 mm/min).

Adhesion: The adhesion of the light-shielding film material is tested using a universal tensile tester, and the tensile direction and the base material form an angle of 90° (50 N pressure sensor, lifting speed is 50 mm/min).

Aging performance : The light-shielding film material is tested using a high-temperature and low-temperature alternating moist heat test chamber, 500 h at -40 ° C, 500 h at 85 ° C, and 500 cold shocks from -40 ° C to 85 ° C. In the case of abnormal cycling, it is required that there is no change in the tested color and OD value.

High-temperature and high-humidity resistance: Requires no change in the tested color and OD value when more than 500 h has elapsed at 85 ℃ and 85 %RH.

Solvent resistance: Required not to fade or break when wiping 100 times with alcohol of 95% or more purity, with a load of 500 g.

Water absorption rate: The film thickness is *5 cm *5 cm, when immersed in pure water at room temperature for 24 h, and the weight before/after immersion is weighed, it is required that the change in weight is <1%.

The formula for calculating the absorption rate is as described below. in other words,

water absorption = (m _{2 -} m ₁ ) / m ₁ * 100%;

m ₁ : the weight of the light-shielding film material before immersion;

m ₂ : It is the weight of the light-shielding film material after immersion.

Moisture permeability: When the test is performed using a moisture permeable cup and 24 hours have elapsed under the conditions of 65 ° C and 95% RH, the desiccant (anhydrous calcium chloride) is required to be <100 g / m ²

The formula for calculating the moisture permeability is as described below. in other words,

water vapor transmission rate = (m ₂ - m ₁ ) / S;

m ₁ : the weight of the desiccant before the moisture permeation test;

m ₂ : the weight of the desiccant after the moisture permeation test;

S: The aperture of the moisture permeable cup (diameter is 10 cm).

Here, the performance parameters of light-shielding film material 1 (abbreviated as 1#) and light-shielding film material 2 (abbreviated as 2#) prepared in Examples 1 to 6, respectively, are shown in Table 7.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 viscosity cps 2200 2500 2700 2000 3000 2350 1# OD value One 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# Hardness 98% 97% 98% 97% 98% 97% 2# Hardness 93% 93% 95% 95% 94% 92% 1# resistance Ω 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 2# resistance Ω 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 10 ¹³ 1# Hardness 80HD 80HA 60HD 95 HA 52HD 58HD 2# Hardness 80HD 80HA 60HD 95 HA 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 cracks, discoloration, adhesive detachment, and OD value of 1 No cracks, discoloration, adhesive detachment, and OD value of 1.3 No cracks, discoloration, adhesive detachment, and OD value of 1.2 No cracks, discoloration, adhesive detachment, and OD value of 0.8 No cracks, discoloration, adhesive detachment, and OD value of 1.5 No cracks, discoloration, adhesive detachment, and OD value of 1.4 2# aging performance No cracks, discoloration, adhesive detachment, and OD value of 2.5 No cracks, discoloration, adhesive detachment, and OD value of 3.2 No cracks, discoloration, adhesive detachment, and OD value of 2.8 No cracks, discoloration, adhesive detachment, and OD value of 2.5 No cracks, discoloration, adhesive detachment, and OD value of 4 No cracks, discoloration, adhesive detachment, and OD value of 3.5 1# High temperature and humidity resistance No cracks, discoloration, adhesive detachment, and OD value of 1 No cracks, discoloration, adhesive detachment, and OD value of 1.3 No cracks, discoloration, adhesive detachment, and OD value of 1.2 No cracks, discoloration, adhesive detachment, and OD value of 0.8 No cracks, discoloration, adhesive detachment, and OD value of 1.5 No cracks, discoloration, adhesive detachment, and OD value of 1.4 2# high temperature and high humidity resistance No cracks, discoloration, adhesive detachment, and OD value of 2.5 No cracks, discoloration, adhesive detachment, and OD value of 3.2 No cracks, discoloration, adhesive detachment, and OD value of 2.8 No cracks, discoloration, adhesive detachment, and OD value of 2.5 No cracks, discoloration, adhesive detachment, and OD value of 4 No cracks, discoloration, adhesive detachment, and OD value of 3.5 1# solvent resistant No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment 2# solvent tolerance No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment No cracks, fading, or adhesive detachment 1# absorption rate 0.5% 0.2% 0.4% 0.3% 0.1% 0.1% 2# 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 7, the light-shielding compositions prepared in Examples of the present invention all showed excellent overall performance, and in particular, when the thickness of the light-shielding film material was 100 μm, they still had an optical density of at least 0.8, that is, an OD value. , when the thickness of the light-shielding film material is 400 μm, it still has a curing degree of at least 93%, so that it cannot have a relatively high OD value at a relatively thin thickness, which currently exists in light-shielding materials, and a relatively thick The technical problem of not being able to have a relatively high degree of curing in thickness has been effectively solved.

The foregoing is only for those skilled in the art to easily understand the technical means of the present invention, and is not intended to limit the present invention. All modifications, equivalent replacements, improvements, etc. made under the premise of not departing from the spirit and principle of the present invention are all included within the protection scope of this application.

Claims (10)

In the light-shielding composition,
Components according to the following mass percentages, i.e. polyurethane acrylate oligomer 40% - 60%, acrylate monomer 30% - 40%, photoinitiator 3% - 10%, additive 0.3% - 5.5%, metal complex dye 0.5% - 1.5 contains %;
Here, the metal complex dye includes at least two of a blue dye, a red dye, and a purple dye; and/or
The absorption wavelength of the metal complex dye is characterized in that more than 400 nm, light-shielding composition. According to claim 1,
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 comprises at least one of Solvent Purple 58 and Triamet Violet 5R. According to claim 1,
The functionality of the polyurethane acrylate oligomer is 2 - 3, and the weight average molecular weight is 1500 - 6000; and/or
The polyurethane acrylate oligomer is characterized in that it comprises at least one of polyether-based polyurethane, polyester-based polyurethane, polycarbonate-based polyurethane, polybutadiene-based polyurethane, light-shielding composition. According to claim 1,
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 relative to the light-shielding composition is 1% to 5%, characterized in that, the light-shielding composition. According to claim 4,
The monofunctional acrylate includes at least one of dodecyl acrylate, isobornyl acrylate, isooctyl acrylate, tetrahydrofurfuryl acrylate, and acryloylmorpholine; and/or
Wherein the trifunctional acrylate comprises at least one of trimethylolpropane triacrylate and pentaerythritol triacrylate. According to any one of claims 1 to 5,
The photoinitiator comprises at least one of photoinitiator TPO, photoinitiator 819, photoinitiator 907, photoinitiator ITX, photoinitiator 369, and photoinitiator DETX. According to claim 6,
The photoinitiator comprises at least one of photoinitiator TPO, photoinitiator 819, and photoinitiator DETX. According to any one of claims 1 to 5,
The additive includes at least one of a silane coupling agent, a leveling agent, and a UV absorber;
The mass percentage of the silane coupling agent with respect to the light-shielding composition is 0.1% - 3%;
The mass percentage of the leveling agent relative to the light-shielding composition is 0.1% - 1.5%;
The mass percentage of the UV absorber relative to the light-shielding composition is 0.1% - 1%, characterized in that, the light-shielding composition. In the method for producing a light-shielding composition,
The light-shielding composition is the light-shielding composition according to claims 1 to 8;
The method for preparing the light-shielding composition includes uniformly stirring an acrylate monomer, a photoinitiator, and an additive in an environment where light does not reach, to form a first mixture;
uniformly stirring a polyurethane acrylate oligomer and a metal complex dye with the first mixture, and obtaining the light-shielding composition through pressure filtration; Characterized in that, the light-shielding composition comprising a. In the display device,
a light-shielding material is provided in the display device, and the light-shielding material is produced by photo-curing a light-shielding composition;
A display device characterized in that the light-shielding composition is the light-shielding composition according to claims 1 to 8 or that the light-shielding composition is manufactured by the manufacturing method according to claim 9.