WO2014157963A1 - Composition de résine pour pellicule de protection de polariseur, pellicule de protection de polariseur, plaque de polarisation comprenant ladite pellicule et procédé de fabrication de la plaque de polarisation - Google Patents

Composition de résine pour pellicule de protection de polariseur, pellicule de protection de polariseur, plaque de polarisation comprenant ladite pellicule et procédé de fabrication de la plaque de polarisation Download PDF

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Publication number
WO2014157963A1
WO2014157963A1 PCT/KR2014/002614 KR2014002614W WO2014157963A1 WO 2014157963 A1 WO2014157963 A1 WO 2014157963A1 KR 2014002614 W KR2014002614 W KR 2014002614W WO 2014157963 A1 WO2014157963 A1 WO 2014157963A1
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WO
WIPO (PCT)
Prior art keywords
protective film
polarizer
polarizing plate
resin composition
fine particles
Prior art date
Application number
PCT/KR2014/002614
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English (en)
Korean (ko)
Inventor
김혜민
장영래
김헌
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from KR1020140035589A external-priority patent/KR101586845B1/ko
Priority claimed from KR1020140035588A external-priority patent/KR101600584B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2016505400A priority Critical patent/JP2016522838A/ja
Priority to US14/780,957 priority patent/US10473825B2/en
Priority to CN201480018913.4A priority patent/CN105102490B/zh
Publication of WO2014157963A1 publication Critical patent/WO2014157963A1/fr
Priority to US16/591,085 priority patent/US11125918B2/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/10—Esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • G02B1/105—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid

Definitions

  • the present invention relates to a resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a manufacturing method of the polarizing plate. More specifically, the present invention relates to a resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a manufacturing method of the polarizing plate, which exhibits excellent physical and optical properties.
  • Liquid crystal displays are one of the most widely used flat panel displays.
  • a liquid crystal display has a structure in which a liquid crystal layer is enclosed between a thin film transistor (TFT) array substrate and a color filter substrate.
  • TFT thin film transistor
  • the arrangement of the liquid crystal molecules of the liquid crystal layer enclosed therebetween is changed to display an image by using the electric field.
  • the polarizing plate is provided outside the array substrate and the color filter substrate.
  • the polarizer may control polarization by selectively transmitting light in a specific direction among light incident from the backlight and light passing through the liquid crystal layer.
  • the polarizing plate generally has a structure in which a protective film for supporting and protecting the polarizer is adhered to a polarizer capable of polarizing light in a specific direction.
  • said protective film it consists of triacetyl cellulose (TAC). Films are widely used. In addition, a protective film for coating a hard coat layer in order to achieve a film having properties of high hardness and wear resistance has been proposed. On the other hand, these days, the use of liquid crystal devices has become widespread, and they are used in devices of various fields, and interest in improving the hardness and thinning of polarizing plates is increasing.
  • TAC triacetyl cellulose
  • the present invention exhibits high hardness and high transparency, and can be thinned, and at the same time exhibits excellent flexibility, a resin composition for a polarizer protective film that does not generate curl or crack, a polarizer protective film, and the like. It provides a polarizing plate and a manufacturing method of a polarizing plate.
  • the present invention is a binder comprising a polyfunctional acrylate monomer, and an acrylate oligomer having an elongation of 5 to 200%; And a photoinitiator.
  • the present invention also provides a polarizer protective film comprising a cured resin with a polyfunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%.
  • the present invention a polarizer; And a protective film provided on at least one surface of the polarizer, wherein the protective film provides a polarizing plate including a curable resin with a polyfunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%.
  • the present invention is a binder comprising a polyfunctional acrylate monomer, and an acrylate oligomer having an elongation of 5 to 200% on a release film; And Applying a resin composition comprising a photoinitiator;
  • a step of applying a flower spectacle the "resin composition forming a protective film It provides a method of manufacturing a polarizing plate comprising the step of laminating and bonding the protective film on one side of the polarizer.
  • the polarizer protective film of the present invention exhibits high hardness, scratch resistance, high transparency and can be usefully applied to various display devices because it does not generate curl or crtack due to excellent processability, and is separately coated on a base film such as a TAC film. It can be made thin without any application.
  • the retardation value is low enough to be substantially close to zero, and can be used for various devices in which such a low retardation value is required, as well as the polarizer protective film, without limitation of use. '
  • the resin composition of the present invention is a binder comprising a polyfunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%; And photoinitiators.
  • the polarizer protective film of the present invention contains a polyfunctional acrylate monomer and a cured resin with an acrylate oligomer having an elongation of 5 to 200%.
  • Polarizing plate of the present invention a polarizer; And a protective film provided on at least one surface of the polarizer, wherein the protective film includes a polyfunctional acrylate monomer and a cured resin with an acrylate oligomer having an elongation of 5 to 200%.
  • Method for producing a polarizing plate of the present invention a binder comprising a polyfunctional acrylate monomer, and an acrylate oligomer having an elongation of 5 to 200% on a release film; And applying a resin composition comprising a photoinitiator; Photocuring the applied resin composition to a protective film Forming; And laminating the protective film on one surface of the polarizer and adhering the protective film.
  • the resin composition for a polarizer protective film of the present invention a polarizer protective film, a polarizing plate including the same, and a manufacturing method of the polarizing plate will be described in more detail.
  • the acrylate-based means not only acrylate but also methacrylate or a derivative in which a substituent is introduced into acrylate or methacrylate.
  • the polarizer protective film according to one aspect of the present invention includes a curable resin with a polyfunctional acrylate monomer and an acrylate oligomer having 5 to 200% of a god.
  • the polarizer protective film is used for the purpose of protecting the polarizer from the outside.
  • polarizer protective films include polyesters such as polyethylene terephthalate (PET), cyclic olefin copolymers (COC), polyacrylates (polyacrylates, PACs), and polycarbonates.
  • PET polyethylene terephthalate
  • COC cyclic olefin copolymers
  • PES polyacrylates
  • PACs polycarbonates
  • PC polycarbonate
  • PE polyethylene
  • PMMA polymethylmethacrylate
  • PEEK polyetheretherketon
  • PEN polyethylenenaphthalate
  • PEI polyetherimide
  • PI polyimide
  • TAC triacetylsalose
  • triacetyl cellulose (TAC) films are particularly used because of their excellent optical properties.
  • TAC film alone When used, the surface hardness is weak and vulnerable to humidity, it is necessary to add a functional coating layer such as hard coating.
  • the functional coating layer is further included in this way, the overall thickness of the protective film is increased, which may not meet recent thinning requirements, and additional coating may cause curl or crack in the film.
  • the present invention replaces the TAC film that is commonly used, and provides a protective film having a low thickness so as to meet the trend of thinner hardness and thinning without including a separate coating layer.
  • the protective film of the present invention exhibits excellent optical properties required for the polarizer protective film, it may exhibit excellent flexibility to facilitate production, processing, storage and transport.
  • the retardation value is substantially close to zero, so that the retardation value can be used not only for the polarizer protective film but also for various devices requiring such a low retardation value without any use limitation.
  • the polarizer protective film of the present invention contains a cured resin with a polyfunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%.
  • the multifunctional acrylate monomer means that the acrylate-based functional group contains two or more and has a molecular weight of less than 1,000 g / mol. More specifically, for example, nucleic acid diol diacrylate (HDD A), tripropylene glycol diacrylate (TPGDA), ethylene glycol diacrylate (EGDA), trimethyl to propane triacrylate (TMPTA), trimethyl propane ethoxy Triacrylate (TMPEOTA), glycerin propoxylated triacrylate (GPTA), pentaerythritol to tetraacrylate (PETA), or dipentaerythr to nuxaacrylate (DPHA).
  • the polyfunctional acrylate monomer is not limited thereto.
  • the multifunctional acrylate monomer crosslinks with each other, or crosslinks with an acrylate oligomer which will be described later to serve to impart a certain strength and wear resistance to the protective film.
  • polyfunctional acrylate monomers alone or different Type can be used in combination.
  • the acrylate-based oligomer is an acrylate having an elongation of about 5 to about 200%, or about 5 to about 100%, or about 10 to about 50%, as measured by ASTM D638. It means the lizolimer which has two or more. When the elongation of the acrylate oligomer has the above range, it may exhibit excellent flexibility and elasticity without deteriorating mechanical properties.
  • the acrylate oligomer that satisfies the elongation range as described above is excellent in flexibility and elasticity to form the acrylate-based monomer and cured resin, and can provide a layered flexibility and curl characteristics to a protective film including the same. Based on this, the present invention has been reached.
  • the weight average molecular weight of the acrylate-based oligomer is about 1,000 to about 10,000 g / mol, or about 1,000 to about 5,000 g / mol, or about 1,000 to about 3,000 g / mol It can have a range.
  • the acrylate oligomer may be an acrylate oligomer modified with one or more of ethylene oxide, propylene oxide, or caprolactone.
  • flexibility may be further provided to the acrylate oligomer by modification, thereby increasing curl characteristics and flexibility of the protective film.
  • the acrylate oligomer may be used alone or in combination with each other.
  • the protective film of this invention contains the above-mentioned polyfunctional acrylate-type monomer and cured resin by which the acrylate oligomer which has elongation of 5 to 200% is hardened by ultraviolet-ray.
  • the protective film of this invention does not contain a triacetyl cellulose (TAC) component.
  • the cured resin is a polyfunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200% of about 2: 8 to about 8: 2, or about 3: 7 to Or about 7: 3, or cured at a weight ratio of about 4: 6 to about 6: 4.
  • the protective film of the present invention is divided into layers without deterioration of mechanical properties. It can be flexible.
  • the protective film of the present invention by including a polyfunctional acrylate monomer and a cured resin cured acrylate oligomer having an elongation of 5 to 200%, it is possible to high hardness and thinness without deterioration of optical properties.
  • the surface hardness and scratch resistance is excellent without a separate functional coating layer such as hard coating.
  • the phase difference value is substantially close to zero for polarizer protection.
  • it can be used without any limitation in various display apparatuses in which low retardation values are required.
  • the protective film according to the present invention includes a cured resin in which an acrylate oligomer is cross-polymerized together with the polyfunctional acrylate monomer described above, thereby exhibiting high hardness and at the same time having flexibility. Accordingly, it can be applied as a multifunctional polarizer protective film by acting as a hard coating layer while also functioning as a polarizer protective layer without a separate functional coating layer.
  • the protective film of the present invention may further include inorganic fine particles.
  • the inorganic fine particles may be included in a form dispersed in the cured resin.
  • the inorganic fine particles may be inorganic fine particles having a nanoscale particle diameter, for example, nanoparticles having a particle diameter of about 100 nm or less, or about 10 to about 100 nm, or about 10 to about 50 nm.
  • the inorganic fine particles may include, for example, silica fine particles, aluminum oxide particles, titanium oxide particles, or zinc oxide particles.
  • the hardness of a protective film can be improved further.
  • the protective film when the protective film further includes inorganic fine particles, when the total weight of the cured resin is 100 parts by weight, the inorganic fine particles may include about 1 to about 100 parts by weight, Or about 10 to about 50 increments.
  • the protective film has a thickness of at least about 10 / ⁇ , for example about 10 to about 200 /, or about 10 to about 100, or about 10 to about 50, or about 10 to about 40 // m, or from about 10 to about 30.
  • the thickness as described above can be thinner than a film including a separate coating layer, it is possible to provide a protective film of high hardness without the occurrence of curl or crack ⁇
  • the polarizer protective film of the present invention as described above photocured the resin composition comprising the multifunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, a photoinitiator, and optionally inorganic fine particles, an organic solvent. Can be formed.
  • a binder comprising a polyfunctional acrylate monomer, and an acrylate oligomer having an elongation of 5 to 200%; And a photoinitiator.
  • the polyfunctional acrylic About 20 to about 80 parts by weight of the monomer may be included, or about 30 to about 70 parts by weight, or about 40 to about 60 parts by weight.
  • the polyfunctional acrylate monomer in the above range, a protective film excellent in both high hardness and flexibility can be formed.
  • the content of the polyfunctional acrylate monomer is lower than 20 parts by weight, the crosslinking density is lowered, so that mechanical properties of the coating film, such as pencil hardness or scratch resistance, may be lowered.
  • the acrylate-based oligomer when the total weight of the binder is 100 parts by weight, may include about 20 to about 80 parts by weight, or about 30 to about 70 parts by weight, Or about 40 to about 60 parts by weight. Of the acrylate oligomer If the content is lower than 20 parts by weight, the coating film may not have a sufficient flexibility, and when using more than 80 parts by weight may lack mechanical properties.
  • the multifunctional acrylate monomer and the acrylate oligomer having an elongation of 5 to 200% is about 2: 8 to about 8: 2, or about 3: 7 to about 7: 3 Or in a weight ratio of about 4: 6 to about 6: 4.
  • the protective film of the present invention may have sufficient flexibility without deterioration of mechanical properties.
  • a binder component includes a polyfunctional acrylate monomer and an acrylate oligomer having a fluorine of 5 to 200%, and the cured resin cured by polymerizing with each other has a thin thickness without deteriorating optical properties.
  • the protective film of can be formed.
  • the protective film thus formed is excellent in surface hardness and scratch resistance even without a separate functional coating layer such as hard coating.
  • excellent flexibility and flexibility can be achieved.
  • the phase difference value is substantially close to zero, and can be used for various display devices that require a low phase difference value as well as a polarizer protective film, without limitation of use.
  • photoinitiator examples include 1'hydroxy-cyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone,
  • Diphenyl (2,4,6-trimethylbenzoyl) -phosphine oxide or bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and the like.
  • Commercially available products include Irgacure 184, Irgacure 500, Irgacure 651, Irgacure 369, Irgacure 907, Darocur 1173, Darocur MBF, Irgacure 819, Darocur TPO, Irgacure 907, and Esacure KIP 100F.
  • These photoinitiators can be used individually or in mixture of 2 or more types different from each other. According to an embodiment of the present invention, the total weight of the binder is 100 In weight parts, the photoinitiator may be included in an amount of about 1 to about 10 parts by weight, or about 1 to about 8 parts by weight.
  • the resin composition of the present invention may be used in the form of a solvent-free solvent containing a solvent when the formulation of each component is uniform and has an appropriate viscosity and there is no problem in the coating process.
  • the resin composition of the present invention may further include an organic solvent for uniform blending and coating properties of each component.
  • organic solvent examples include methane, alcohol solvents such as ethanol, isopropyl alcohol, butane, alkoxy alcohol solvents such as 2-methoxyethanol, 2-ethoxyethanol, and 1-methoxy-2-propanol, and acetone.
  • Ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, methyl propyl ketone, cyclonucleanone, propylene glycol monopropyl ether, propylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl Ether solvents such as ether, diethylene glycol monomethyl ether, diethyl glycol monoethyl ether, diethyl glycol monopropyl ether, diethyl glycol monobutyl ether, diethylene glycol-2-ethylhexyl ether, benzene, toluene, Aromatic solvents, such as xylene, etc. can be used individually or in mixture.
  • the content of the organic solvent is not particularly limited because it can be variously adjusted within a range that does not lower the physical properties of the resin composition.
  • the resin composition of the present invention may further include inorganic fine particles.
  • the inorganic fine particles may be included in the resin composition in a form dispersed in the multifunctional acrylate monomer.
  • the inorganic fine particles may be inorganic fine particles having a nanoscale particle diameter, for example, nanoparticles having a particle diameter of about 100 nm or less, or about 10 to about 100 nm, or about 10 to about 50 nm.
  • the inorganic fine particles may include, for example, silica fine particles, aluminum oxide particles, titanium oxide particles, or zinc oxide particles.
  • the resin composition when the resin composition further includes inorganic fine particles, when the total weight of the binder is 100 parts by weight, the inorganic fine particles may include about 1 to about 100 parts by weight, or About 10 to about 50 parts by weight.
  • the protective film excellent in both high hardness and flexibility can be formed.
  • the resin composition is the above-mentioned polyfunctional acrylate monomer, acrylate-based oligomer having an elongation of 5 to 200%, inorganic fine particles, photoinitiator, organic solvent, UV absorber, surfactant, anti-yellowing agent, It may further include additives commonly used in the art, such as leveling agents, antifouling agents.
  • the content can be variously adjusted within a range that does not lower the physical properties of the protective film of the present invention, it is not particularly limited.
  • the resin composition may include a surfactant as an additive, and the surfactant may be a 1 to 2 functional fluorine-based acrylate, a fluorine-based surfactant, or a silicone-based surfactant.
  • the surfactant may be included in the form of being dispersed or crosslinked in the cured resin.
  • a yellowing inhibitor may be included as the additive, and the yellowing inhibitor may include a benzophenone compound or a benzotriazole compound.
  • a resin composition comprising a binder comprising a multifunctional acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%, a photoinitiator, and optionally an organic solvent, inorganic fine particles, and other additives is viewed.
  • a polarizer protective film can be formed.
  • the polarizer and a protective film provided on at least one side of the polarizer, wherein the protective film includes a polyfunctional acrylate monomer and a cured resin with an acrylate oligomer having an elongation of 5 to 200%. do.
  • the polyfunctional on the release film A binder comprising an acrylate monomer and an acrylate oligomer having an elongation of 5 to 200%; And applying a resin composition comprising a photoinitiator; Photocuring the applied resin composition to form a protective film; And it provides a method of manufacturing a polarizing plate comprising the step of laminating and bonding the protective film on one side of the polarizer.
  • a resin composition containing a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a photoinitiator is applied onto a release film.
  • the detailed description about the component contained in the said resin composition is as having demonstrated in the said polarizer protective film.
  • the resin composition may optionally further include an organic solvent, inorganic fine particles, additives, and the like.
  • the release film may be used without limitation as long as it is commonly used in the art to which the present invention pertains.
  • the release film is a polyester film, polyethylene film, polyethylene terephthalate film, poly polrieul repin-based film such as a polypropylene film may be or teflon-based film, preferably to facilitate exfoliation
  • the film may be a release treatment with a silicone resin, melamine resin or urea resin.
  • the thickness of the release film is not particularly limited, but a release film having a thickness of about 20 to about 200 ⁇ 11 may be mainly used.
  • the release film may be removed by peeling after curing the resin composition before attaching the protective film to the polarizer. Or may be removed after attachment to the polarizer to favor transport and storage or the like.
  • the method of applying the resin composition is not particularly limited as long as it can be used in the technical field to which the present technology belongs, and for example, a bar coating method, a knife coating method, a coating method, a blade coating method, a die coating method, and a microgravure coating method.
  • the method, the comma coating method, the sludge die coating method, the lip coating method, or the solution casting method can be used.
  • a protective film can be formed by irradiating an ultraviolet ray to the apply
  • the irradiation amount of ultraviolet rays may be, for example, about 20 to about 600 mJ / cm 2 .
  • the light source for ultraviolet irradiation is not particularly limited as long as it can be used in the art to which the present technology belongs, and for example, a high pressure mercury lamp, a metal halide lamp, a black light fluorescent lamp, or the like can be used.
  • a polarizer protective film formed of a single layer without a base film such as TAC or a separate coating layer may be obtained.
  • the protective film since the protective film is applied to a separate release film and cured instead of directly forming on the polarizer, it is not affected by the shrinkage of the substrate and does not generate curls or cracks and forms a high hardness protective film. can do.
  • the protective film of the present invention exhibits high hardness, flexibility, scratch resistance, high transparency, and can be used as a single layer film for polarizer protection and can be usefully used in various display devices.
  • the protective film may be included only on one side of the polarizer, or both sides of the polarizer.
  • the polarizer exhibits a property of extracting only light vibrating in one direction from incident light while vibrating in various directions. This property can be achieved by stretching polyvinyl alcohol (PVA) absorbing iodine with strong tension. For example, more specifically, swelling by swelling the PVA film in an aqueous solution, dyeing with a dichroic material imparting polarization to the swelled PVA film, stretching the dyed PVA filmol
  • the polarizer may be formed through a stretching step of arranging the dichroic dye material in a stretching direction, and a complementary color step of correcting a color of the PVA film subjected to the stretching step.
  • the polarizing plate of the present invention is not limited thereto.
  • the polarizing plate of the present invention includes a protective film provided on at least one surface of the polarizer.
  • the protective film is about 10 ⁇ s or more, for example about 10 to about ⁇ , or About 10 to about 50, or about 10 to about 40, or about 10 to about 30 mm 3 thickness.
  • the total thickness of the polarizing plate of the present invention may be about 45 / m or more, for example, about 45 to about 250, or about 50 to about 120 kPa, or about 50 to about 100. According to the present invention, while having a thin thickness as described above, it is possible to achieve high hardness without curling or cracking.
  • the protective film is comprising a cured resin with the polyfunctional acrylate, the monomer and, and 5 to acrylic having elongation of 200% acrylate oligomer, and optionally may further include an inorganic fine particle which is dispersed in the cured resin .
  • a more detailed description thereof and a method of manufacturing the protective film are as described in the protective film for polarizer.
  • the polarizing plate of the present invention may further include an adhesive layer provided between the polarizer and the protective film.
  • the adhesive layer may include a polarizer adhesive, which may have transparency and maintain polarization characteristics of the polarizer.
  • a polarizer adhesive which may have transparency and maintain polarization characteristics of the polarizer.
  • Usable adhesives are not particularly limited as long as they are known in the art. For example, there are one-component or two-component polyvinyl alcohol (PVA) adhesives, acrylic adhesives, polyurethane adhesives, epoxy adhesives, styrene butadiene rubber (SBR) adhesives, hot melt adhesives, and the like. It is not limited only to an example.
  • PVA polyvinyl alcohol
  • SBR styrene butadiene rubber
  • the thickness of the adhesive layer may be about 0.1 to about 10, or about 0.1 to about 5, but the present invention is not limited only to these examples.
  • the polarizing plate of this invention can be obtained by laminating and bonding to a polarizer using the formed protective film all adhesive agent.
  • the release film may be removed by selectively peeling off or after attaching the protective film to the polarizer after curing of the resin composition.
  • the protective film may be attached to both sides of the polarizer.
  • the protective film is attached only to one side of the polarizer, the other side to attach another general purpose film such as TAC Can be.
  • the protective film may be positioned at the outermost side facing the user.
  • the protective film of the present invention exhibits high hardness, scratch resistance, and optical properties suitable for the outermost layer.
  • the protective film of the present invention exhibits excellent properties that can replace the TAC film, and thus the polarizing plate including the same may have excellent pencil hardness, curling properties, flexibility and optical properties.
  • the polarizing plate of the present invention when exposed to room temperature for 24 hours and placed in a plane, the average value of the distance from each corner or one side plane of the polarizing plate is about 3mm Or about 2 mm or less, or about 1 mm or less.
  • the pencil hardness at 500g load may be 1H or more, or 2H or more, or 3H or more.
  • the polarizing plate of the present invention may have a single transmittance of 40% or more, or 42% or more.
  • the polarizing plate of the present invention may not be cracked when it is wound around a cylindrical mantel of 15mm, 12mm, or 5mm in diameter.
  • the protective film provided in the polarizing plate of the present invention may exhibit a plane direction retardation value of 0 to 1 nm, 0 to 0.6 nm, or 0 to 0.5 nm.
  • the polarizing plate provided with such a protective film of this invention can be utilized in various fields.
  • it can be used for mobile communication terminals, smart phones, other mobile devices, display devices, electronic blackboards, outdoor billboards, and various display units.
  • the polarizing plate may be a twisted nematic (TN), a polarizing plate for super twisted nematic (STN) liquid crystal, an in-plane switching (IPS), a super-IPS, a fringe field switching (FFS), or the like. It may be a polarizing plate for the horizontal alignment mode, or may be a polarizing plate for the vertical alignment mode.
  • TN twisted nematic
  • STN super twisted nematic
  • IPS in-plane switching
  • FFS fringe field switching
  • TMPTA trimethylolpropane triacrylate
  • DPCA120 Nippon Kayaku, caprolactone modified 6 functional acrylate, 12% elongation measured by ASTM D638, Mw 1,950
  • PU3400 mowon, ethylene oxide modified trifunctional acrylate, A 20% elongation measured by ASTM D638, 30 g of Mw 2,500
  • 6 g of a photoinitiator trade name Darocur TPO
  • 3 g of a UV absorber trade name Chimassorb 81
  • MEK lOg MEK lOg
  • TMPTA trimethylolpropane triacrylate
  • DPCA120 20 g
  • TA604AU Japanese oil, ethylene oxide modified trifunctional acrylate, 49% elongation measured by ASTM D638, Mw 2,300
  • photoinitiator trade name Darocur TPO
  • UV A coating solution was prepared by mixing 3 g of an absorbent (trade name Chimassorb 81) and MEK lOg, and bar coating the PET release film. After drying for 2 minutes at 60 ° C., black UV irradiation in a nitrogen atmosphere to obtain a protective film having a thickness of 25.
  • TMPTA trimethylolpropane triacrylate
  • EB1290 SK Cytec, 6 functional urethane acrylate, elongation 0% measured by ASTM D638, Mw 1,000
  • photoinitiator trade name Darocur TPO
  • UV absorber trade name Chimassorb 81
  • MEK 10 g of the mixture was mixed to prepare a coating solution and bar coated onto a 40 m thick TAC film. After drying for 2 minutes at 60 ° C., black UV irradiation in a nitrogen atmosphere to obtain a protective film having a thickness of 6 on the TAC film.
  • the protective film prepared in Example 1 was laminated by laminating with a PVA film so that the thickness of the adhesive layer was approximately 1 mm by using an acrylic adhesive, and the PET release film was peeled off.
  • a polarizing plate was prepared in the same manner as in Example 4 by attaching a protective film of Example 2 to one side of the PVA film and a TAC film having a thickness of 40 ⁇ to the other side.
  • a polarizing plate was prepared in the same manner as in Example 4 by attaching the protective film of Example 3 to one side of the PVA film and attaching a TAC film of 40 thickness to the other side. Comparative Example 2
  • a 40-thick TAC film is laminated with a PVA film using an acrylic adhesive so that the thickness of the adhesive is approximately 1 Adhesion was performed to prepare a polarizing plate.
  • the transmittance and the haze were measured using a Hazemeter (HM 150).
  • the retardation value was measured using a phase difference measuring instrument (Axoscan).
  • Each polarizing plate was cut into 10 cm ⁇ 10 cm and stored for 24 hours, and then the average value of the distance from which one side of each corner is spaced apart from the plane was measured.
  • Each polarizer is wound into a cylindrical moldrel with a diameter of 5mm, and it is OK to determine if cracks have occurred. The case was evaluated with X. The physical property measurement results are shown in Table 1 below.
  • the polarizing plate of the embodiment of the present invention exhibited good properties in all the physical properties.
  • the conventional protective film including TAC and coating layer and Comparative Example 3 including only TAC as in Comparative Example 2 it exhibits high hardness, excellent curl characteristics, flexibility, low phase difference, etc. at a low thickness, and requires thinning. It can be usefully used for the display device.

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  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
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  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

La présente invention concerne une composition de résine pour une pellicule de protection de polariseur, une pellicule de protection de polariseur, une plaque de polarisation comprenant ladite pellicule et un procédé de fabrication de la plaque de polarisation et, plus particulièrement, une composition de résine pour une pellicule de protection de polariseur présentant une dureté élevée et d'excellentes caractéristiques, une pellicule de protection de polariseur, une plaque de polarisation comprenant ladite pellicule et un procédé de fabrication de la plaque de polarisation. La plaque de polarisation selon la présente invention présente d'excellentes caractéristiques de dureté, de flexibilité et optiques, et peut ainsi servir dans divers domaines.
PCT/KR2014/002614 2013-03-27 2014-03-27 Composition de résine pour pellicule de protection de polariseur, pellicule de protection de polariseur, plaque de polarisation comprenant ladite pellicule et procédé de fabrication de la plaque de polarisation WO2014157963A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2016505400A JP2016522838A (ja) 2013-03-27 2014-03-27 偏光子保護フィルム用樹脂組成物、偏光子保護フィルム、これを含む偏光板および偏光板の製造方法
US14/780,957 US10473825B2 (en) 2013-03-27 2014-03-27 Resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a preparation method of a polarizing plate
CN201480018913.4A CN105102490B (zh) 2013-03-27 2014-03-27 偏光器保护膜用树脂组合物、偏光器保护膜、含有该保护膜的偏光板及偏光板的制备方法
US16/591,085 US11125918B2 (en) 2013-03-27 2019-10-02 Resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a preparation method of a polarizing plate

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR20130033004 2013-03-27
KR20130033002 2013-03-27
KR10-2013-0033004 2013-03-27
KR10-2013-0033002 2013-03-27
KR10-2014-0035588 2014-03-26
KR1020140035589A KR101586845B1 (ko) 2013-03-27 2014-03-26 편광자 보호 필름, 이를 포함하는 편광판 및 편광판의 제조방법
KR10-2014-0035589 2014-03-26
KR1020140035588A KR101600584B1 (ko) 2013-03-27 2014-03-26 편광자 보호 필름용 수지 조성물

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US14/780,957 A-371-Of-International US10473825B2 (en) 2013-03-27 2014-03-27 Resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a preparation method of a polarizing plate
US16/591,085 Division US11125918B2 (en) 2013-03-27 2019-10-02 Resin composition for a polarizer protective film, a polarizer protective film, a polarizing plate including the same, and a preparation method of a polarizing plate

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JP2017146431A (ja) * 2016-02-17 2017-08-24 株式会社巴川製紙所 積層体の製造方法、および偏光板の製造方法、並びに積層体
CN107849372A (zh) * 2015-07-06 2018-03-27 株式会社Lg化学 宽色域膜、用于制备其的组合物、包括其的偏光板和包括所述偏光板的液晶显示器
JP2018528449A (ja) * 2015-09-15 2018-09-27 エルジー・ケム・リミテッド 偏光子保護フィルム、これを含む偏光板、および前記偏光板を含む液晶ディスプレイ装置
US11067847B2 (en) 2015-09-15 2021-07-20 Lg Chem, Ltd. Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107849372A (zh) * 2015-07-06 2018-03-27 株式会社Lg化学 宽色域膜、用于制备其的组合物、包括其的偏光板和包括所述偏光板的液晶显示器
US10871677B2 (en) 2015-07-06 2020-12-22 Lg Chem, Ltd. Wide color gamut film, composition for preparing the same, polarizing plate comprising the same, and liquid crystal display comprising the polarizer plate
JP2018528449A (ja) * 2015-09-15 2018-09-27 エルジー・ケム・リミテッド 偏光子保護フィルム、これを含む偏光板、および前記偏光板を含む液晶ディスプレイ装置
US11003017B2 (en) 2015-09-15 2021-05-11 Lg Chem, Ltd. Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate
US11067847B2 (en) 2015-09-15 2021-07-20 Lg Chem, Ltd. Polarizer protective film, polarizing plate comprising same, and liquid crystal display device comprising polarizing plate
JP2017146431A (ja) * 2016-02-17 2017-08-24 株式会社巴川製紙所 積層体の製造方法、および偏光板の製造方法、並びに積層体

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