KR20170103079A - Adhesive composition for optical use and adhesive sheet - Google Patents
Adhesive composition for optical use and adhesive sheet Download PDFInfo
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- KR20170103079A KR20170103079A KR1020160025271A KR20160025271A KR20170103079A KR 20170103079 A KR20170103079 A KR 20170103079A KR 1020160025271 A KR1020160025271 A KR 1020160025271A KR 20160025271 A KR20160025271 A KR 20160025271A KR 20170103079 A KR20170103079 A KR 20170103079A
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- acrylate
- initiator
- adhesive composition
- photocurable
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
Abstract
Description
Optical adhesive compositions and optical adhesive sheets for optical applications.
Generally, an adhesive film is used between a window glass and a touch screen panel glass in a display device in which a touch screen panel is used, which directly affects the visibility and image quality quality of the display device. In the long term, It is important to maintain durability even when used. Accordingly, with regard to the pressure-sensitive adhesives used in touch screen panels and the like, transparency and visibility are ensured, pressure-sensitive adhesives that maintain good adhesive performance under high temperature and high humidity environment, have excellent peelability and low modulus, Various studies have been actively carried out.
An embodiment of the present invention provides a pressure-sensitive adhesive composition for optical applications that exhibits excellent reliability under high temperature and high humidity environment, has high peeling force and low modulus, and can ensure excellent processability.
Another embodiment of the present invention provides an adhesive sheet for optical formed from the optical pressure-sensitive adhesive composition, which is applied to a display device including a touch screen panel or the like to provide excellent durability and reliability.
In one embodiment of the present invention, the photo-curable acrylic compound; And a first photo-curing initiator and a second photo-curing initiator having different photocuring efficiencies for the photocurable acrylic compound per unit time of 1 second at a wavelength of 200 nm to 400 nm.
In another embodiment of the present invention, there is provided an optical adhesive sheet formed by photo-curing the optical adhesive composition.
The optical pressure-sensitive adhesive composition for optical use is easy to produce as a pressure-sensitive adhesive sheet, and the optical pressure-sensitive adhesive sheet produced therefrom exhibits excellent reliability under a high temperature and high humidity environment and can exhibit excellent durability based on high peeling force.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art to which the invention pertains. Only. Like reference numerals refer to like elements throughout the specification.
In one embodiment of the present invention, the photo-curable acrylic compound; And a first photo-curing initiator and a second photo-curing initiator having different photocuring efficiencies for the photocurable acrylic compound per unit time of 1 second at a wavelength of about 200 nm to about 400 nm .
Generally, when a pressure sensitive adhesive sheet for optical use is produced through a photo-curing method, the pressure sensitive adhesive composition for optical use provided as a raw material is produced by photo-curing under a predetermined condition. The more the volatile components remaining after the photo- Adherence and reliability under a high temperature and high humidity environment are lowered. The remaining volatile components include unreacted initiator, uncured monomer, non-reactive additive, moisture in the pressure-sensitive adhesive, etc., which volatilize under high temperature and high humidity or cause additional radical formation and deteriorate adhesion and reliability of the pressure- It causes.
The pressure sensitive adhesive composition for optical use according to one embodiment of the present invention may contain two types of first photo-curing initiator and second photo-curing initiator which contain a photo-curable acrylic compound and have different photo-curing efficiencies for the photo-curable acrylic compound The remaining volatile components can be minimized, thereby improving the reliability under a high temperature and high humidity environment.
Specifically, both the first photo-curable initiator and the second photo curable initiator can initiate a photoactive reaction for curing the photo-curable acrylic compound in a wavelength range of about 200 nm to about 400 nm. The first photocurable initiator and the second photocurable initiator have different photocuring efficiencies for the photocurable acrylic compound per unit time of one second.
The 'photocuring efficiency' of the first photocurable initiator and the second photocurable initiator is a measure indicating the rate at which the photocurable acrylic compound is cured by the photocurable initiator. Specifically, when the total amount of the photo-curing initiator added for curing is 1, the amount of the photo-curing initiator causing the initiation reaction for curing the photo-curable acrylic compound per unit time of 1 sec Quot;
Specifically, the higher the value of the photo-curing efficiency of the photo-curing initiator, the faster the curing speed. The optical pressure-sensitive adhesive composition is obtained by mixing a photo-curing initiator having a relatively high curing speed and a photo- The photocuring initiator having a high curing rate at the initial stage of the curing reaction forms the main curing structure and the photocuring initiator having a low curing rate at the latter stage of the curing reaction is allowed to participate in the curing reaction without remaining volatile components such as monomers , A pressure-sensitive adhesive sheet having little residual volatile components can be produced.
For example, when the initiator having a relatively high photo-curing efficiency is the first photo-curing initiator and the initiator having a relatively low photo-curing efficiency is the second photo-curing initiator, the value of the photo- 0.2 to 0.5. The photocuring initiator having a relatively high photo-curing efficiency exhibits the photo-curing efficiency within the above-mentioned range, so that the main curing structure can be formed quickly at the beginning of the curing reaction and the residual vapors remaining as low as possible after completion of the curing process can be obtained .
When the photocuring efficiency of the first photocurable initiator is greater than the photocuring efficiency of the second photocurable initiator, the photocuring efficiency of the first photocurable initiator is preferably 100% or more, , From about 30% to about 80%. That is, the photocurable relative efficiency of the second photocurable initiator to the first photocurable initiator may be about 30% to about 80%.
If the photocurable relative efficiency of the second photocurable initiator is less than about 30%, the volatile components such as unreacted initiator may remain after the final curing, thereby reducing the reliability of the pressure sensitive adhesive sheet in a high temperature and high humidity environment, The effect of improving the reliability under a high temperature and high humidity environment may not be sufficient due to the mixed use of the first photocurable initiator and the second photocurable initiator.
When the photocuring efficiency of the first photocurable initiator is higher than the photocuring efficiency of the second photocurable initiator, the weight ratio of the first photocurable initiator: the second photocurable initiator is 10: 1 to 50: 1 And may be, for example, from 10: 1 to 20: 1.
That is, the first photo-curing initiator having a relatively high curing speed and the second photo-curing initiator having a relatively low curing speed are contained at the weight ratio within the above range, whereby the optical pressure-sensitive adhesive composition is cured, The volatile components can be minimized, and excellent adhesion and high temperature reliability can be ensured based on low modulus.
Wherein the first photo-curing initiator and the first photo-curing initiator are selected from the group consisting of an alpha-hydroxy ketone initiator, a phenylglyoxylate-based initiator, a benzyldimethyl-ketal-based initiator, an alpha-amino ketone- A bisacylphosphine-based initiator, a phosphine oxide-based initiator, a metallocene-based initiator, an iodonium salt-based initiator, and a combination thereof.
Specifically, the first photocurable initiator may include a benzyldimethyl-ketal initiator, and the second photocurable initiator may include an alpha-hydroxy ketone initiator. When the first photocurable initiator and the second photocurable initiator each include the above-mentioned kind, it is easy to secure the difference in the photocuring efficiency in the above-mentioned range. In this case, by using the optical pressure-sensitive adhesive composition, A pressure-sensitive adhesive sheet having reliability can be manufactured.
The photo-curable acrylic compound is an acrylic compound cured by a photoactive reaction, and may include a monomer of a (meth) acrylic ester compound, and may also include an oligomer or a prepolymer of the (meth) acrylate compound. Here, the 'oligomer' means a small polymer polymerized such that the monomer has a weight average molecular weight of less than about 1,000, and the 'prepolymer' has a weight average molecular weight of about 1,000 to about 100,000. ≪ / RTI >
That is, the photo-curable acrylic compound is a compound in which the monomer mixture of the (meth) acrylic acid ester compound is partially polymerized to form an oligomer or a prepolymer and they are mixed with the monomer of the (meth) acrylate ester compound . Thus, when the photocurable acrylic compound is a monomer; And the oligomer or prepolymer is mixed, a curing structure more advantageous for securing adhesiveness and reliability can be formed by mixing use of the first photocurable initiator and the second photocurable initiator.
Specifically, the photo-curable acrylic compound may include an oligomer or a prepolymer formed by polymerizing or copolymerizing the (meth) acrylic acid ester compound and containing a monomer of the (meth) acrylate ester compound. That is, the photo-curable acrylic compound includes a (meth) acrylic acid ester compound in the form of a monomer, and may include or may include an oligomer and a prepolymer formed by polymerization or copolymerization of the (meth) acrylic acid ester compound have.
The photocurable acrylic compound may have a weight ratio of the monomer: oligomer or prepolymer of about 60:40 to about 95: 5. In other words, the photo-curable acrylic compound may have a degree of polymerization of 5% to 40%. In this case, the 'degree of polymerization' means the weight ratio of the monomers converted to oligomers or prepolymers in the whole monomers.
The photocurable acrylic compound may be cured to have a proper degree of curing by the first photocurable initiator and the second photocurable initiator by including the monomer so as to have a weight ratio within the above range with respect to an oligomer or prepolymer other than the monomer. In addition, excellent coating property and processability can be secured in the process of producing a pressure-sensitive adhesive sheet from the optical pressure-sensitive adhesive composition.
The photo-curable acrylic compound may include the (meth) acrylic acid ester compound. Specifically, the (meth) acrylic acid ester compound includes an alkyl (meth) acrylate and a (meth) acrylate containing a polar functional group . The (meth) acrylic ester compound includes a polar functional group-containing (meth) acrylate together with an alkyl (meth) acrylate having an appropriate alkyl group or cycloalkyl group so that the optical adhesive composition has excellent wettability and tackiness And a cured structure having high reliability at a high temperature can be formed by using the first photocurable initiator and the second photocurable initiator in combination.
Specifically, the alkyl (meth) acrylate is a (meth) acrylate having a linear or branched alkyl group having 1 to 14 carbon atoms; Or a (meth) acrylate having a cycloalkyl group having 3 to 20 carbon atoms. Here, the cycloalkyl group means a monocyclic or polycyclic alkyl group having the above carbon number range.
The alkyl (meth) acrylate includes an alkyl group or a cycloalkyl group having a carbon number within the above range, whereby the optical pressure sensitive adhesive composition can have a monomer having an appropriate length, and the first and second photosetting initiators It is possible to easily form a cured structure which ensures excellent adhesiveness and reliability.
More specifically, the alkyl (meth) acrylate is selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) (Meth) acrylate, 2-ethylbutyl (meth) acrylate, sec-butyl (meth) acrylate, pentyl (Meth) acrylate, isooctyl (meth) acrylate, isobonyl (meth) acrylate or isononyl (meth) acrylate, and combinations thereof.
The (meth) acrylate containing a polar functional group may include at least one selected from the group consisting of a hydroxyl group-containing acrylate, a carboxyl group-containing acrylate, a nitrogen-containing acrylate, and combinations thereof.
Specifically, the hydroxy group-containing acrylate may be at least one selected from the group consisting of 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyleneglycol (meth) acrylate, and combinations thereof can do.
The carboxyl group-containing acrylate may be at least one selected from the group consisting of acrylic acid, methacrylic acid, 2- (meth) acryloyloxyacetic acid, 3- (meth) acryloyloxypropyl acid, 4- (meth) acryloyloxybutyric acid, Dicarboxylic acid, itaconic acid, maleic acid, and combinations thereof.
The nitrogen-containing acrylate may be at least one compound selected from the group consisting of 2-isocyanatoethyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, 4-isocyanatobutyl Acrylamide, and combinations thereof.
The (meth) acrylic acid ester compound includes the alkyl (meth) acrylate and the polar functional group-containing (meth) acrylate, wherein the alkyl (meth) By weight to about 95% by weight. By including the above alkyl (meth) acrylate in the above range, it can be advantageous in ensuring reliability in an adhesive property and an environment of high temperature and high humidity.
The (meth) acrylate compound may contain about 5 to about 50% by weight of the polar functional group-containing (meth) acrylate. The inclusion of the polar functional group-containing (meth) acrylate in the above range may be advantageous in securing the adhesive property and the optical property.
The optical pressure-sensitive adhesive composition may further comprise, if necessary, one additive selected from the group consisting of a curing agent, a crosslinking agent, and a combination thereof.
For example, the curing agent may include a polyfunctional acryl-based curing agent. Specific examples thereof include hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, , Dipentaerythritol hexacrylate, and combinations thereof. ≪ RTI ID = 0.0 >
The optical pressure-sensitive adhesive composition includes the first photo-curable initiator and the second photo-curable initiator together with the photo-curable acrylic compound in an appropriate weight ratio to form a photo-curable resin at a selected single wavelength among the wavelengths of about 200 nm to about 400 nm And can be photocured at a single selected wavelength, for example, at a wavelength of from about 300 nm to about 350 nm.
The optical adhesive composition may be less than about 2% by weight of residual volatile components that are photocured at a single wavelength selected from a wavelength of from about 200 nm to about 400 nm, for example, from about 300 nm to about 350 nm . In this case, photocuring at a single wavelength refers to photocuring at a selected wavelength without a gradient of the wavelength.
In addition, the optical pressure-sensitive adhesive composition may have less than about 1.5% by weight of residual volatile components after being photocured at a selected single wavelength of the wavelength range, for example, less than about 1% by weight.
The optical pressure-sensitive adhesive composition is formed by appropriately mixing the first photocurable initiator and the second photocurable initiator together with the photocurable acrylic compound to form a photocured at a wavelength within the range to minimize residual volatile components Thus, the pressure-sensitive adhesive sheet produced from the optical pressure-sensitive adhesive composition can exhibit excellent tackiness even in an environment of high temperature and high humidity, and can prevent white turbidity. In addition, excellent step difference absorbency and durability can be imparted based on appropriate modulus.
In another embodiment of the present invention, there is provided an optical adhesive sheet formed by photo-curing the optical adhesive composition.
Specifically, the pressure-sensitive adhesive sheet can be formed by photocuring the optical adhesive composition at a single selected wavelength from a wavelength of about 200 nm to about 400 nm, more specifically, selected from a wavelength of about 300 nm to about 350 nm For example, at a single wavelength.
The optical adhesive sheet can be used as an optical clear adhesive film. Specifically, the optical adhesive sheet can be interposed on one side of a window of a display device including a touch screen panel.
The window to which the optical adhesive sheet is applied may be a plastic material, for example, and may include polycarbonate (PC). Generally, in the case of an adhesive sheet, the adhesive force for a glass material tends to be higher than that of a plastic material. Since the optical adhesive sheet is produced from the optical adhesive composition, Lt; / RTI >
Specifically, the peel strength of the adhesive sheet to a substrate comprising polycarbonate can be about 1.5 to about 3 kg / inch, for example about 2.1 to about 3 kg / inch. The pressure-sensitive adhesive sheet is formed of the optical pressure-sensitive adhesive composition, and specifically, the first photocurable initiator and the second photocurable initiator having appropriate photocuring efficiency differences are mixed and used in an appropriate amount to secure the peeling force in the above range . The pressure-sensitive adhesive sheet exhibits a peeling force in the above-described range with respect to the base material, so that it is applied to a display device and the like to give excellent durability and impact resistance, and it is possible to easily secure the bending property of the base material for application to a flexible display or the like .
The optical pressure-sensitive adhesive sheet for optical use does not cause whitening or whitish phenomenon even when used for a long time in an environment of high temperature and high humidity, and can be advantageously applied to a display device requiring excellent visibility.
The pressure-sensitive adhesive sheet is placed at a temperature of about 60 캜 to about 90 캜 and at a relative humidity of about 30% to about 90% for about 24 hours to about 96 hours, and then the number of bubbles per unit area of a square having a diagonal length of 5 inches And may be, for example, five or less, for example, zero (0). Since the pressure-sensitive adhesive sheet is produced from the optical pressure-sensitive adhesive composition and exhibits excellent physical properties, it can exhibit excellent visibility with little occurrence of bubbles after being left in a high temperature and high humidity environment such as the temperature and humidity for a long time. That is, the pressure-sensitive adhesive sheet can ensure excellent high-temperature reliability.
Hereinafter, specific embodiments of the present invention will be described. However, the embodiments described below are only intended to illustrate or explain the present invention, and thus the present invention should not be limited thereto.
<
Example
And
Comparative Example
>
Example One
A composition comprising 40% by weight of ethylhexyl acrylate (EHA), 30% by weight of isobornyl acrylate (IBOA), 10% by weight of hydroxyethyl acrylate (HEA) and 20% by weight of isostearyl acrylate (ISTA) Or prepolymer in a weight ratio of 80:20 to prepare a photocurable acrylic compound. Next, a benzyldimethyl-ketal system first photo-curing initiator having a photocuring efficiency of 0.3 per unit time of 1 second at 350 nm with respect to the above-mentioned photo-curable acrylic compound, and a first photo-curing initiator having a photo- A second photo-curing initiator based on a hydroxy ketone was charged, and the weight ratio of the first photo-curing initiator and the second photo curing initiator was 20: 1. That is, the photocurable relative efficiency of the second photocurable initiator to the first photocurable initiator is about 47%, wherein the total content of the first photocurable initiator and the second photocurable initiator is the same as that of the photocurable acrylic 0.3 parts by weight based on 100 parts by weight of the compound. Subsequently, an ultraviolet ray of 350 nm was irradiated at an energy of 0.6 mW / cm < 2 > to be photo-cured to produce an adhesive sheet for optical use having a thickness of 100 mu m.
Example 2
A pressure-sensitive adhesive sheet having a thickness of 100 m was prepared in the same manner as in Example 1, except that the weight ratio of the first photo-curable initiator to the second photo curable initiator was 50:50.
Comparative Example One
Except that the first photo-curing initiator was not added and only the second photo-curing initiator was added in an amount of 0.3 parts by weight based on 100 parts by weight of the photo-curable acrylic compound. To prepare a pressure-sensitive adhesive sheet.
<Evaluation>
Experimental Example 1: Measurement of residual volatile components
The pressure-sensitive adhesive sheets of the examples and comparative examples were cut to a size of 5 cm x 5 cm, and the initial weight Wi was measured, followed by drying in an oven at 110 deg. C for 2 hours. After the weight (Wf) of the pressure-sensitive adhesive sheet after drying was measured, the weight% of the residual volatile components in the pressure-sensitive adhesive sheet was measured using the formula of Wf / Wi x 100, and the results are shown in Table 1 below.
Experimental Example 2: Hardening Measure
The pressure-sensitive adhesive sheets of the examples and comparative examples were cut to a size of 5 cm x 5 cm and initial weight Wi was measured. Subsequently, the pressure-sensitive adhesive sheet was immersed in an ethyl acetate solvent and kept at room temperature for 24 hours. Subsequently, the mixture was filtered using a screening apparatus, dried at 100 DEG C for 4 hours, and the weight (Wf) was measured. Then, the degree of curing was measured by the following formula 1, and the results are as shown in Table 1 below.
[Formula 1]
Hardening degree (%) = {1 - (Wi - Wf) / Wi} x 100
Experimental Example 3: Exfoliation Measure
The pressure-sensitive adhesive sheets of the examples and comparative examples were cut to a size of 65 mm x 140 mm, adhered to a polycarbonate substrate, and then measured for 180 DEG peel strength at a peeling speed of 300 mm / min. The results are shown in Table 1 below.
Experimental Example 4: Measurement of high temperature and high humidity durability
The pressure-sensitive adhesive sheet of the examples and comparative examples was cut to a size of 150 mm x 150 mm, and a PET film on which indium-tin oxide (ITO) was deposited on one side of the pressure-sensitive adhesive sheet was placed so that the ITO- And a polycarbonate substrate was arranged on the back surface. Subsequently, after storing for 10 days under the environment of a temperature of 80 캜 and a relative humidity of 90%, the number of bubbles generated per unit area of a quadrangle having a diagonal length of 5 inches of the pressure-sensitive adhesive sheet was observed. The results are shown in Table 1 below.
Referring to the results of Table 1 above, the pressure-sensitive adhesive sheets of Examples 1 and 2 were prepared by mixing the first photo-curing initiator and the second photo-curing initiator in Comparative Example 1 containing only the second photo- And the durability under a high temperature and high humidity environment was remarkably excellent. It was also found that the pressure-sensitive adhesive sheets of Examples 1 and 2 were superior in adhesion to the polycarbonate substrate as compared with Comparative Example 1. [
On the other hand, in the case of Example 1, the weight ratio of the first photocurable initiator to the second photocurable initiator is in the range of 10: 1 to 50: 1, As compared with the case where the content of the second photocurable initiator was higher than that of the first photocurable initiator and the photocurable initiator was mixed at a weight ratio deviating from the above range as in Example 2, Durability was also excellent.
Claims (16)
Adhesive composition for optics.
Wherein the photocurable efficiency of the first photocurable initiator is greater than the photocurable efficiency of the second photocurable initiator and the weight ratio of the first photocurable initiator to the second photocurable initiator is from 10: 1 to 50: 1
Adhesive composition for optics.
The photocuring efficiency of the second photocurable initiator is 30% to 80% based on 100% of the photocuring efficiency of the first photocurable initiator
Adhesive composition for optics.
Wherein each of the first photocurable initiator and the second photocurable initiator is selected from the group consisting of alpha-hydroxy ketones, phenylglyoxylates, benzyldimethyl-ketaldehyde, alpha-amino ketones, monoacylphosphines, bisacylphosphines, At least one selected from oxides, metallocenes, iodonium salts, and combinations thereof.
Adhesive composition for optics.
The photocurable acrylic compound may be a monomer of a (meth) acrylic acid ester compound; And an oligomer or prepolymer of the (meth) acrylic acid ester compound
Adhesive composition for optics.
The (meth) acrylate compound may be an alkyl (meth) acrylate; And (meth) acrylate containing a polar functional group
Adhesive composition for optics.
The alkyl (meth) acrylate is preferably a (meth) acrylate containing a linear or branched alkyl group having 1 to 14 carbon atoms; Or a (meth) acrylate containing a cycloalkyl group having 3 to 20 carbon atoms
Adhesive composition for optics.
The alkyl (meth) acrylate may be at least one selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) Butyl (meth) acrylate, sec-butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylhexyl (Meth) acrylate, isobonyl (meth) acrylate, isobonyl (meth) acrylate or isononyl (meth) acrylate, and combinations thereof.
Adhesive composition for optics.
The polar functional group-containing (meth) acrylate includes at least one selected from the group consisting of a hydroxyl group-containing acrylate, a carboxyl group-containing acrylate, a nitrogen-containing acrylate,
Adhesive composition for optics.
The alkyl (meth) acrylate in the (meth) acrylic ester compound is contained in an amount of 50 to 95 wt%
Adhesive composition for optics.
The (meth) acrylate compound containing the polar functional group is contained in an amount of 5 wt% to 50 wt%
Adhesive composition for optics.
The pressure-sensitive adhesive composition is prepared by photocuring at a single wavelength selected from a wavelength of 200 nm to 400 nm, and the residual volatile component is less than 2% by weight
Adhesive composition for optics.
The pressure-sensitive adhesive sheet is formed by photocuring the optical adhesive composition at a single wavelength selected from a wavelength of 200 nm to 400 nm
Optical adhesive sheet.
The pressure-sensitive adhesive sheet may have a peel strength of 1.5 to 3 kg / inch on a substrate containing polycarbonate
Optical adhesive sheet.
The pressure-sensitive adhesive sheet has a bubble count of 10 or less per unit area of a square having a diagonal length of 5 inches after being placed at a temperature of 60 to 90 DEG C and a relative humidity of 30 to 90% for 24 to 96 hours
Optical adhesive sheet.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020111338A1 (en) * | 2018-11-30 | 2020-06-04 | 주식회사 영우 | Optical clear adhesive tape having improved level difference absorbability and manufacturing method therefor |
| KR20200103185A (en) * | 2019-02-14 | 2020-09-02 | 주식회사 엘지화학 | Ink composition for 3d inkjet printing to provide excllent toughness |
| WO2021066628A1 (en) * | 2019-10-04 | 2021-04-08 | 주식회사 동진쎄미켐 | Coating composition and laminate comprising coating layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130130927A (en) * | 2012-05-23 | 2013-12-03 | 동우 화인켐 주식회사 | Adhesive composition and adhesive layer |
| KR20150015087A (en) * | 2013-07-31 | 2015-02-10 | 엘지디스플레이 주식회사 | Display Device and Method of manufacturing the same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130130927A (en) * | 2012-05-23 | 2013-12-03 | 동우 화인켐 주식회사 | Adhesive composition and adhesive layer |
| KR20150015087A (en) * | 2013-07-31 | 2015-02-10 | 엘지디스플레이 주식회사 | Display Device and Method of manufacturing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020111338A1 (en) * | 2018-11-30 | 2020-06-04 | 주식회사 영우 | Optical clear adhesive tape having improved level difference absorbability and manufacturing method therefor |
| KR20200103185A (en) * | 2019-02-14 | 2020-09-02 | 주식회사 엘지화학 | Ink composition for 3d inkjet printing to provide excllent toughness |
| WO2021066628A1 (en) * | 2019-10-04 | 2021-04-08 | 주식회사 동진쎄미켐 | Coating composition and laminate comprising coating layer |
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