CN112662305A - Anti-ultraviolet and blue-light-absorbing composition, optical film comprising same and polarizing plate - Google Patents
Anti-ultraviolet and blue-light-absorbing composition, optical film comprising same and polarizing plate Download PDFInfo
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Abstract
The invention belongs to the technical field of optical materials, and particularly relates to an anti-ultraviolet blue-light-absorbable composition, an optical film and a polarizing plate comprising the same. The composition capable of resisting ultraviolet and absorbing blue light comprises an ultraviolet blue light absorber shown as a formula (I), wherein intramolecular and intermolecular hydroxyl of 2-methyl-2-buten-1-ol and ketone groups of quinophthalone can form stable hydrogen bonds, and the hydrogen bonds can form a large cyclic structure with quinoline and quinophthalone, so that the molecular structure is more stable, and the thermal stability of the composition is improved; the 2-methyl-2-butene-1-ol contains an olefinic bond, and forms a conjugated structure with a quinoline double bond and a hydrogen bond of a large cyclic structure, so that the first absorption peak of the molecule is 420nm, which is red-shifted by 15-30 nm compared with the conventional quinophthalone, and can effectively absorb short-wave blue light; the R-substituted phenyl is matched with benzotriazole, so that the second absorption peak of the molecule is 320nm, the peak width is large, and ultraviolet light can be effectively absorbed.
Description
Technical Field
The invention belongs to the technical field of optical materials, and particularly relates to an anti-ultraviolet blue-light-absorbable composition, an optical film comprising the same and a polarizing plate comprising the same.
Background
It is well known that ultraviolet light can harm a person's eyes, but recent studies have shown that some wavelengths of blue light can also cause damage to the eye: the optical film is short-wave blue light within the range of 400-440 nm, has short wavelength and high energy, is greatly harmful to eyes, and keeps low transmittance when the optical film is used for responding to the blue light of the wave band; the range of 440-470 nm is medium-wave blue light, the damage to human eyes is relatively small, and the optical film has a certain transmittance for the blue light in the wave band; the range of 470-500 nm is long-wave blue light, which can help pupil contraction and display the color of an object, and the optical film is beneficial to blue light, and should keep high transmittance for the blue light in the wave band.
At present, illuminating lamps, mobile phones, computers, tablet computers, televisions and the like used in families and offices almost adopt LED light sources, the light sources usually consist of blue light and yellow light with main peaks of 465nm, the spectral curves of the blue light and the yellow light are shown in figure 1, and it can be seen that light with wavelengths of 400-440 nm generally accounts for a large proportion of light emitted by electronic products, namely, the light receives a large amount of short-wave blue light every day. According to the orange early warning released by the World Health Organization (WHO)2009, the potential stealth threat of short-wave blue light to human beings far surpasses the destructive effects of Sudan red, melamine, SARS and the like, and at least 30000 people are blinded by the radiation of blue light every year.
The existing ultraviolet-resistant optical materials are prepared by adding ultraviolet absorbers into optical resin, and the materials can effectively absorb purple light and ultraviolet rays but cannot filter harmful short-wave blue light. Moreover, the industrialized optical film mostly adopts a film coating process, and short, medium and long-wave blue light is generally not distinguished; the newly developed optical film can shield blue light, but can shield short-wave blue light and visible light in other wave bands, so that the visible light transmittance is low or the color is distorted.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing optical film cannot distinguish between harmfulness and shielding.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides an anti-ultraviolet and blue-light-absorbable composition, which comprises an ultraviolet blue-light absorber shown as a formula (I):
wherein R is an electron withdrawing group.
Preferably, the anti-ultraviolet composition capable of absorbing blue light comprises an aldehyde group, a carboxyl group, a sulfonic group, a nitrile group and a nitro group.
Preferably, the anti-ultraviolet and blue-light-absorbing composition further comprises urethane acrylate, a urethane acrylate monomer, an initiator, polyvinyl alcohol and a crosslinking curing agent;
the weight ratio of the ultraviolet blue light absorber, the polyurethane acrylate monomer, the initiator, the polyvinyl alcohol and the crosslinking curing agent is (1.5-2.5): 90-100): 40-50): 4-8): 4-10): 2-10.
Preferably, the ultraviolet-resistant and blue-light-absorbable composition is prepared by selecting at least one initiator from 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycycloethyl phenyl ketone.
Further preferably, the polymerization degree of the polyvinyl alcohol is 1700-1800, and the alcoholysis degree is 85-89% in the ultraviolet-resistant blue light absorbing composition.
Preferably, the anti-ultraviolet and blue-light absorbing composition has the crosslinking curing agent selected from at least one of epoxy glycidyl ether, isocyanate dimer and isocyanate trimer.
The present invention also provides an optical film comprising:
a base film;
a shielding film formed by curing the ultraviolet-resistant and blue-light-absorbing composition;
an adhesive layer for fixing the shielding film on the base film.
Preferably, in the optical film, the base film material is at least one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cycloolefin polymer, and methylene diphenyl diisocyanate.
Preferably, the thickness of the shielding film of the optical film is 0.2-0.4 μm.
The present invention also provides a polarizing plate comprising:
a polarizer;
an optical film as described above is provided on at least one surface of the polarizer.
The technical scheme of the invention has the following advantages:
1. the invention provides an anti-ultraviolet blue light absorbing composition, which comprises an ultraviolet blue light absorber shown as a formula (I), and comprises benzotriazolyl, phenyl substituted by electron-withdrawing groups, 2-methyl-2-butylene-1-alcohol substituted quinolyl and quinophthalone. The hydroxyl of the 2-methyl-2-butylene-1-alcohol in and among molecules and the quinophthalone group can form a stable hydrogen bond, and the hydrogen bond can form a large ring structure with quinoline and quinophthalone, so that the molecular structure is more stable, and the thermal stability of the composition is improved.
In addition, the 2-methyl-2-butene-1-alcohol contains an olefinic bond, and forms a conjugated structure with a quinolyl double bond and a hydrogen bond with a large ring structure, so that the first absorption peak of the molecule is 420nm, the molecule is subjected to red shift of 15-30 nm compared with the conventional quinophthalone, and short-wave blue light can be effectively absorbed; meanwhile, the phenyl substituted by the electron-withdrawing group is matched with the benzotriazol-yl, so that the second absorption peak of the molecule is 320nm, the peak width is large, and ultraviolet light can be effectively absorbed.
2. According to the anti-ultraviolet blue light absorbable composition provided by the invention, the electron-withdrawing group is selected from aldehyde group, carboxyl group, sulfonic group, nitrile group and nitro group, the electron-withdrawing group and benzotriazolyl group and quinoline group respectively form a double-dipole material, intramolecular electronic transition is generated to generate electromagnetic oscillation, most ultraviolet light and short-wave blue light in an absorption spectrum have the transmittance of less than or equal to 0.006% for ultraviolet light (220-380 nm), the transmittance of less than or equal to 1% for short-wave blue light (400-440 nm), the transmittance of less than or equal to 20% for medium-wave blue light (440-470 nm), the transmittance of more than or equal to 78% for long-wave blue light (470-500 nm) and the transmittance of more than or equal to 96% for visible light of other wave bands.
3. The ultraviolet-resistant blue light absorbing composition provided by the invention considers that the property of polyvinyl alcohol is closely related to the polymerization degree and alcoholysis degree of the polyvinyl alcohol, the alcoholysis degree of the polyvinyl alcohol is divided into partial alcoholysis and complete alcoholysis, and the completely alcoholyzed polyvinyl alcohol is easier to uniformly disperse the ultraviolet blue light absorbing agent but is not easy to uniformly mix with other raw material molecules, so that the polymerization degree of the polyvinyl alcohol is limited to 1700-1800, and the alcoholysis degree is 85-89%.
4. The optical film provided by the invention comprises the shielding film prepared from the ultraviolet-resistant and blue-light-absorbable composition, so that the optical film has good functions of shielding ultraviolet rays and absorbing short-wave blue light, can be widely applied to electronic product screen display laminated bodies or screen protective films and other parts such as sunglasses, glass and the like, and can reduce the damage of ultraviolet rays and short-wave blue light to human skins and eyes.
5. The polarizing plate provided by the invention comprises the polarizer and the optical film arranged on at least one surface of the polarizer, the optical film and the polarizer are prepared into the integrated polarizing plate in advance in a dust-free environment, the bonding cleanliness of the optical film and the polarizer is ensured, and then the integrated polarizing plate is directly attached to a device, so that the operation is fast and convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a hydrogen nuclear magnetic spectrum of an ultraviolet blue light absorber provided in example 1 of the present invention;
FIG. 2 is a hydrogen nuclear magnetic spectrum of an ultraviolet blue light absorber provided in example 2 of the present invention;
FIG. 3 is a hydrogen nuclear magnetic spectrum of an ultraviolet blue light absorber provided in example 3 of the present invention;
FIG. 4 is a hydrogen nuclear magnetic spectrum of an ultraviolet blue light absorber provided in example 4 of the present invention;
FIG. 5 is a hydrogen nuclear magnetic spectrum of an ultraviolet blue light absorber provided in example 5 of the present invention;
FIG. 6 is a view showing the structure of an optical film provided in example 8 of the present invention;
FIG. 7 is a spectrum absorption chart of a shielding film prepared from the composition for resisting ultraviolet light and absorbing blue light provided in example 1 of the present invention;
description of reference numerals:
1-a base film; 2-a brightness enhancement film; 3-adhesive layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides an anti-ultraviolet and blue-light-absorbable composition, which comprises the following raw materials in parts by weight:
wherein, the ultraviolet blue light absorbent has a structure shown in a formula (I-A):
the molecular formula is as follows: c35H22N4O7The molar mass is as follows: 610.58, respectively; m/z 610.15 (100.0%), 611.15 (37.9%), 612.16 (7.0%), 611.15 (1.5%), 612.15 (1.4%); elemental analysis: c, 68.85; h, 3.63; n, 9.18; o, 18.34; the hydrogen NMR spectrum is shown in FIG. 1.
The initiator is 2-hydroxy-2-methyl-1-phenyl-1-acetone;
the polymerization degree of the polyvinyl alcohol is 1740-1760, and the alcoholysis degree is 86-88%;
the crosslinking curing agent is epoxy glycidyl ether.
Example 2
The embodiment provides an anti-ultraviolet and blue-light-absorbable composition, which comprises the following raw materials in parts by weight:
wherein, the ultraviolet blue light absorbent has a structure shown in a formula (I-B):
the molecular formula is as follows: c35H21N5O5The molar mass is as follows: 591.58, respectively; m/z 591.15 (100.0%), 592.16 (37.9%), 593.16 (4.3%), 593.16 (2.7%), 592.15 (1.8%), 593.16 (1.0%); elemental analysis: c, 71.06; h, 3.58; n, 11.84; o, 13.52; the hydrogen nuclear magnetic spectrum is shown in FIG. 2.
The initiator is 1-hydroxy cycloethyl phenyl ketone;
the polymerization degree of the polyvinyl alcohol is 1720-1740, and the alcoholysis degree is 87-89%;
the crosslinking curing agent is isocyanate trimer.
Example 3
The embodiment provides an anti-ultraviolet and blue-light-absorbable composition, which comprises the following raw materials in parts by weight:
wherein, the ultraviolet blue light absorbent has a structure shown in formula (I-C):
the molecular formula is as follows: c34H22N4O8S, molar mass: 646.63, respectively; m/z 646.12 (100.0%), 647.12 (36.8%), 648.11 (4.5%), 648.12 (3.9%), 648.12 (2.7%), 649.11 (1.7%), 648.12 (1.6%), 647.11 (1.5%); elemental analysis: c, 63.15; h, 3.43; n, 8.66; o, 19.79; s, 4.96; the hydrogen NMR spectrum is shown in FIG. 3.
The initiator is 1-hydroxy cycloethyl phenyl ketone;
the polymerization degree of the polyvinyl alcohol is 1760-1780, and the alcoholysis degree is 86-88%;
the crosslinking curing agent is isocyanate dimer.
Example 4
The embodiment provides an anti-ultraviolet and blue-light-absorbable composition, which comprises the following raw materials in parts by weight:
wherein, the ultraviolet blue light absorbent has a structure shown in formula (I-D):
the molecular formula is as follows: c35H22N4O6The molar mass is as follows: 594.58, respectively; m/z 594.15 (100.0%), 595.16 (37.9%), 596.16 (7.0%), 595.15 (1.5%), 596.16 (1.2%); elemental analysis: c, 70.70; h, 3.73; n, 9.42; o, 16.14; the hydrogen NMR spectrum is shown in FIG. 4.
The initiator is 1-hydroxy cycloethyl phenyl ketone;
the polymerization degree of the polyvinyl alcohol is 1780-1800, and the alcoholysis degree is 85-87%;
the crosslinking curing agent is a mixture of isocyanate dimer and isocyanate trimer.
Example 5
The embodiment provides an anti-ultraviolet and blue-light-absorbable composition, which comprises the following raw materials in parts by weight:
wherein, the ultraviolet blue light absorbent has a structure shown in formula (I-E):
the molecular formula is as follows: c34H21N5O7The molar mass is as follows:611.57, respectively; m/z:611.14 (100.0%), 612.15 (36.8%), 613.15 (6.6%), 612.14 (1.8%), 613.15 (1.4%); elemental analysis: c, 66.77; h, 3.46; n, 11.45; o, 18.31; the hydrogen nuclear magnetic spectrum is shown in FIG. 5.
The initiator is a mixture of 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxy cycloethyl phenyl ketone;
the polymerization degree of the polyvinyl alcohol is 1700-1720, and the alcoholysis degree is 85-87%;
the crosslinking curing agent is epoxy glycidyl ether.
Example 6
This example provides a method for preparing the ultraviolet blue light absorber of examples 1-5, including the steps of:
(1) preparation of Compound (I-6)
Transferring 0.1mol of the compound (I-1) into a reaction bottle, adding 50ml of 6N hydrochloric acid, and stirring until the mixture is dissolved; transferring the reaction system to an ice salt bath, cooling to-5 ℃, and dropwise adding NaNO with the concentration of 2mol/L into the reaction system2The solution (60 ml) was reacted for 1 hour under heat preservation, and then filtered to obtain the compound (I-2).
Adding NaOH 0.15mol and Na2CO3Transferring 0.55mol of the mixture into a reaction bottle, adding 200ml of deionized water for dissolving, then adding 0.11mol of the compound (I-3), and continuously stirring for dissolving; and transferring the reaction system into a salt-freezing bath, cooling to 0 ℃, slowly dropwise adding a compound (I-2) solution (containing 0.1mol of the compound (I-2)), continuously cooling to-2 ℃, carrying out heat preservation reaction for 1.5 hours, filtering, washing a filter cake with frozen water, and drying the obtained solid to obtain the compound (I-4).
Transferring 0.1mol of the compound (I-4) into a reaction bottle, cooling the reaction bottle by an ice salt bath to 0 ℃, dropwise adding 200ml of a sodium hydroxide solution with the concentration of 2mol/L, dropwise adding 150ml of a sodium hydrosulfite solution with the concentration of 1mol, heating the reaction bottle to 15 ℃, keeping the temperature for reaction for 0.5 hour, continuously heating the reaction bottle to 20 ℃, keeping the temperature for reaction for 0.5 hour, refluxing the reaction for 0.5 hour, filtering, transferring the obtained filtrate into a beaker, dropwise adding 6N hydrochloric acid to adjust the pH value of the reaction system to 7.5, filtering, washing a filter cake by using ice water, transferring the filter cake into a methanol-acetone mixed solvent (the volume ratio is 1:1) for recrystallization, and obtaining the compound (I-5).
Under the protection of nitrogen, dissolving 0.1mol of the compound (I-5) in 100ml of tetrahydrofuran, cooling to 0 ℃ in an ice salt bath, beginning to dropwise add 150ml of i-PrMgCl-LiCl tetrahydrofuran solution with the concentration of 1mol/L, and keeping the temperature for reaction for 1 hour; then, dropwise adding 100ml of trimethyl borate tetrahydrofuran solution with the concentration of 1.5mol/L into the reaction system, firstly carrying out heat preservation reaction at 0 ℃ for 3 hours, then carrying out heat preservation reaction at 8 ℃ for 5 hours, then carrying out heat preservation reaction at 20 ℃ for 10 hours, adding 2N hydrochloric acid to carry out quenching reaction, adjusting the pH value to 2.5, extracting twice by using ethyl acetate, washing twice by using saturated salt water, drying and evaporating the ethyl acetate phase, and recrystallizing the obtained solid by using isopropanol to obtain the compound (I-6).
(2) Preparation of Compound (I-10)
Transferring 0.1mol of the compound (I-7) and 0.15mol of NaF into 100ml of dichloromethane, reacting for 6 hours at 55 ℃, adding saturated saline solution, stirring uniformly, standing for layering, collecting an organic phase, washing with water for three times, drying with anhydrous magnesium sulfate, filtering, evaporating the organic phase to dryness, and performing column chromatography (eluent is petroleum ether: ethyl acetate: 8:1) to obtain the compound (I-8).
0.1mol of the compound (I-8) was transferred to 100ml of toluene, and SeO was added thereto when it was heated to 98 ℃2Heating to reflux, reacting for 1 hr, gradient cooling to 25 deg.C (5 deg.C per 1 hr), filtering, washing the filter cake with ethyl acetate for three times, collecting the organic phase, evaporating to dryness, and performing column chromatography (eluent is petroleum ether: ethyl acetate: 50:1) to obtain compound (I-9).
0.1mol of compound (I-9) and 0.12mol of hydroxymethyl acetate are mixed, 1100ml of ethanol solution of sodium ethoxide with the concentration of 0.1mol/L is dripped at the temperature of 12 ℃, after the dripping is finished, the reaction system is heated to 59 ℃ for reaction for 4 hours, the temperature is reduced to 10 ℃, the pH value is adjusted to be neutral by 4N hydrochloric acid, 500ml of ethyl acetate is added for separating liquid, the water phase is extracted by ethyl acetate for three times, the organic phases are combined and washed by saturated saline solution for three times, and then the organic phase is dried by anhydrous magnesium sulfate, filtered and evaporated to dryness to obtain the compound (I-10).
(3) Preparation of Compound (I)
Transferring 0.1mol of the compound (I-6), 0.12mol of the compound (I-10) and 0.2mol of potassium carbonate to a tetrahydrofuran-water mixed solvent (the volume ratio is 2:1.5), heating to 80 ℃, adding 0.02mol of tetrakis (triphenylphosphine) palladium, heating to 90 ℃, and keeping the temperature for reaction for 7 hours; cooling, removing the water layer, collecting the organic layer, drying with magnesium sulfate, filtering, and evaporating the organic layer to dryness to obtain the compound shown in formula (I-11).
Dissolving 0.1mol of compound (I-11) and 0.1mol of phthalic anhydride in 1,3, 5-trichlorobenzene, slowly heating to 200 ℃ for reaction for 1.5 hours, cooling to room temperature, filtering, and recrystallizing a filter cake with isopropanol to obtain compound (I).
Wherein, the compound (I-3) is sold in the market, and the electron-withdrawing group is selected from any one of formaldehyde group, carboxaldehyde group, carboxyl group, formamide group, methane sulfonic group, nitrile group and nitro group.
Example 7
This example provides a method of making a barrier film from the uv blue absorbing resistant compositions provided in examples 1-5:
adding the raw materials into a container according to the ratio of the raw materials of the uvioresistant blue-light absorbing composition, stirring to obtain a coating liquid, coating the coating liquid on a template, carrying out thermal curing in an oven at 90 ℃ for 1 minute, and finally carrying out thermal curing at 350MJ/cm2And (3) irradiating by using ultraviolet light with a dosage, and curing a coating layer of the ultraviolet light to form the shielding film.
Example 8
The present embodiment provides an optical film, as shown in fig. 6, including a base film 1, a shielding film 2, and an adhesive layer 3.
The shielding film 2 provided by example 7 is fixed on the base film 1 through the adhesive layer 3, and the thickness of the shielding film 2 can be selected from any value in the range of 0.2-0.4 μm, such as 0.2 μm, 0.3 μm or 0.4 μm. In the present embodiment, the thickness of the shielding film 2 is 0.3 μm.
The material of the base film 1 is at least one selected from polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cyclic olefin polymer and methylene diphenyl diisocyanate. In this embodiment, the material of the base film 1 is selected from methylene diphenyl diisocyanate.
Example 9
This example provides a polarizing plate comprising a polarizer and an optical film disposed on at least one surface of the polarizer, the optical film provided by example 8. In this example, optical films were provided on both surfaces of the polarizer.
Comparative example 1
This comparative example provides an anti-uv blue-absorbing composition which, unlike example 1,
replacing the ultraviolet blue light absorber represented by formula (I):
comparative example 2
This comparative example provides an anti-uv blue absorbing composition, which, unlike example 1, does not contain polyvinyl alcohol.
Test example 1
The shielding films prepared from the compositions for resisting ultraviolet and absorbing blue light provided by examples 1-5 and comparative examples 1-2 are respectively subjected to light transmittance and spectral absorption performance tests.
The light transmittance test method comprises the following steps: the light transmittance of the shielding films prepared by combining the anti-ultraviolet absorbable blue light provided by examples 1-5 and comparative examples 1-2 was measured on a prism of an ultraviolet-visible spectrophotometer, and the light transmittance results are shown in table 1;
spectral absorption test method: the UV resistant blue light absorbing composition provided in example 1 was dissolved in dichloromethane or ethyl acetate at a concentration of 1X 10-5And mol/L, and an absorption spectrum is measured and is shown in FIG. 7.
TABLE 1 light transmittance (T%) of each shielding film
From table 1, compared with comparative examples 1-2, the shielding films prepared from the compositions for resisting ultraviolet and absorbing blue light provided in examples 1-5 have good absorption functions for both ultraviolet light and short-wave blue light, and have a transmittance of ultraviolet light (220-380 nm) of not more than 0.006%, a transmittance of short-wave blue light (400-440 nm) of not more than 1%, a transmittance of medium-wave blue light (440-470 nm) of not more than 20%, and a transmittance of long-wave blue light (470-500 nm) of not less than 78%. The hydroxyl of 2-methyl-2-butylene-1-alcohol in molecules and among molecules can form stable hydrogen bonds with cyclohexanone and quinophthalone ketone groups, and the hydrogen bonds, the cyclohexanone, quinoline and quinophthalone form a large ring structure, so that the molecular structure is more stable, the thermal stability of the composition is improved, the refractive index of a shielding film is improved, the light transmittance of visible light is improved, the visible light transmittance is more than or equal to 96%, and color distortion is avoided.
From figure 7, the ultraviolet blue light absorber provided by the invention has an ethylenic bond in the molecule of 2-methyl-2-butene-1-ol, and forms a conjugated structure with a quinolyl double bond and a hydrogen bond with a large ring structure, so that the first absorption peak of the molecule is 420nm, and the molecule is subjected to red shift of 15-30 nm compared with the conventional quinophthalone, and can effectively absorb short-wave blue light; meanwhile, the phenyl substituted by the electron-withdrawing group is matched with the benzotriazol-yl, so that the second absorption peak of the molecule is 320nm, the peak width is large, and ultraviolet light can be effectively absorbed.
In conclusion, the ultraviolet blue light absorbent provided by the invention is applied to laminated bodies of screen displays or screen protective films of electronic products and other parts such as sunglasses, glass and the like, and reduces the damage of ultraviolet and short-wave blue light to human skins and eyes.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An anti-UV blue-light absorbing composition comprising a UV blue-light absorber of formula (I):
wherein R is an electron withdrawing group.
2. The UV-resistant blue-light absorbing composition according to claim 1, wherein the electron-withdrawing group comprises aldehyde group, carboxyl group, sulfonic group, nitrile group, and nitro group.
3. The UV-resistant and blue-light-absorbable composition according to claim 1 or 2, further comprising urethane acrylate, a urethane acrylate monomer, an initiator, polyvinyl alcohol and a crosslinking curing agent;
the weight ratio of the ultraviolet blue light absorber, the polyurethane acrylate monomer, the initiator, the polyvinyl alcohol and the crosslinking curing agent is (1.5-2.5): 90-100): 40-50): 4-8): 4-10): 2-10.
4. The composition for resisting ultraviolet and absorbing blue light according to claim 1 or 2, wherein the initiator is at least one selected from 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycycloethylphenyl ketone.
5. The UV-resistant blue light absorbing composition according to claim 4, wherein the degree of polymerization of the PVA ranges from 1700 to 1800, and the degree of alcoholysis ranges from 85 to 89%.
6. The UV-resistant and blue-light-absorbable composition according to claim 1 or 2, wherein the crosslinking and curing agent is at least one selected from the group consisting of epoxy glycidyl ether, isocyanate dimer and isocyanate trimer.
7. An optical film, comprising:
a base film;
a shielding film formed by curing the ultraviolet light absorbing blue light resistant composition of any one of claims 1 to 6;
an adhesive layer for fixing the shielding film on the base film.
8. The optical film according to claim 7, wherein the base film material is at least one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cyclic olefin polymer, and methylene diphenyl diisocyanate.
9. The optical film according to claim 7 or 8, wherein the thickness of the shielding film is 0.2 to 0.4 μm.
10. A polarizing plate, comprising:
a polarizer;
an optical film according to any one of claims 7 to 9 provided on at least one surface of the polarizer.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010742A (en) * | 2022-06-02 | 2022-09-06 | 苏州瑞尔康科技有限公司 | Blue light absorbent, silicon hydrogel corneal contact lens based on blue light absorbent and application of silicon hydrogel corneal contact lens |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010742A (en) * | 2022-06-02 | 2022-09-06 | 苏州瑞尔康科技有限公司 | Blue light absorbent, silicon hydrogel corneal contact lens based on blue light absorbent and application of silicon hydrogel corneal contact lens |
| CN115010742B (en) * | 2022-06-02 | 2024-03-22 | 苏州瑞尔康科技有限公司 | Blue light absorbent, silicon hydrogel cornea contact lens based on blue light absorbent and application of blue light absorbent |
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