WO2014157964A1 - 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

Info

Publication number
WO2014157964A1
WO2014157964A1 PCT/KR2014/002615 KR2014002615W WO2014157964A1 WO 2014157964 A1 WO2014157964 A1 WO 2014157964A1 KR 2014002615 W KR2014002615 W KR 2014002615W WO 2014157964 A1 WO2014157964 A1 WO 2014157964A1
Authority
WO
WIPO (PCT)
Prior art keywords
acrylate
protective film
polarizing plate
polarizer
weight
Prior art date
Application number
PCT/KR2014/002615
Other languages
English (en)
Korean (ko)
Inventor
김혜민
장영래
이한나
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.)
Filing date
Publication date
Priority claimed from KR1020140035586A external-priority patent/KR101600582B1/ko
Priority claimed from KR1020140035587A external-priority patent/KR101586843B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2016505401A priority Critical patent/JP6455993B2/ja
Priority to CN201480019011.2A priority patent/CN105073797B/zh
Priority to US14/781,006 priority patent/US10330829B2/en
Publication of WO2014157964A1 publication Critical patent/WO2014157964A1/fr
Priority to US16/432,517 priority patent/US11143796B2/en
Priority to US16/432,564 priority patent/US11150386B2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • 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
    • 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
    • G02B1/105—
    • 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 method of manufacturing the polarizing plate, which exhibit excellent physical and optical properties.
  • Liquid crystal displays are one of the most widely used flat panel displays at present.
  • 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
  • When applying an electric field to the electrode ⁇ present on the array substrate and the color filter substrate is changed to an arrangement of liquid crystal molecules in the liquid crystal layer enclosed therebetween, and displays images by using them.
  • 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 As said protective film, it consists of triacetyl cellulose (TAC). Films are widely used. In addition, a protective film has been proposed for coating a hard coat layer to achieve a film having properties of high hardness and wear resistance . 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 crtack, a polarizer protective film, and the like. It provides a polarizing plate and a manufacturing method of a polarizing plate.
  • the present invention provides a resin composition comprising a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a binder containing a acrylate elastic polymer and a photoinitiator. To provide.
  • the present invention also provides a polarizer protective film comprising a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a cured resin with an acrylate elastic polymer.
  • the present invention a polarizer; And a protective film provided on at least one surface of the polarizer, wherein the protective film is a polyfunctional acrylate monomer, cured with an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer. It provides a polarizing plate containing a resin.
  • the present invention is a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate based on a release film A binder comprising an elastic polymer; And applying a resin composition comprising a photoinitiator;
  • Photocuring the coated resin composition fire to form 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.
  • a protective film which exhibits high hardness, scratch resistance and high transparency and which does not generate curl or cracks with excellent workability can be usefully applied to various display devices.
  • 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, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer; And photoinitiators.
  • the polarizer protective film of the present invention contains a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a cured resin with an acrylate elastic polymer.
  • Polarizing plate of the present invention a polarizer
  • a protective film provided on at least one surface of the polarizer, wherein the protective film is a polyfunctional acrylate monomer, an acrylate-based oligomer having an elongation of 5 to 200%, and a cured resin with an acrylate-based elastic polymer. It includes.
  • a binder comprising a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate-based elastic polymer on a release film; And optical Applying a resin composition comprising an initiator; Photocuring the applied resin composition to form a protective film; And laminating the protective film on one surface of the polarizer and adhering the protective film.
  • the resin composition for polarizer protective film of this invention a polarizer protective film, the polarizing plate containing this, and the manufacturing method of a polarizing plate are demonstrated in detail.
  • the acrylate-based means both acrylates and methacrylates, or derivatives in which substituents are introduced into acrylates or methacrylates.
  • the polarizer protective film according to an aspect of the present invention includes a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a cured resin with an acrylate elastic polymer.
  • the said polarizer protective film is used for the use which protects a polarizer from an external arc.
  • 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
  • PMMA polymethylmethacrylate
  • PEEK polyetheretherketon
  • PEN polyethylenenaphthalate
  • PEI polyetherimide PEI
  • the base material which consists of a polyimide (PI) or triacetyl cellulose (TAC) etc. is mentioned.
  • triacetyl cellulose (TAC) film is particularly optical. It is excellent in characteristics and used a lot. By the way, when the TAC film is used alone, the surface hardness is weak and vulnerable to humidity, it is necessary to add a functional coating layer such as hard coating. However, if 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. Accordingly, the present invention replaces the TAC film that is commonly used, and provides a protective film having a low thickness so as to meet a sufficient hardness and thinning trend without including a separate coating layer.
  • TAC triacetyl cellulose
  • 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 low to nearly 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 polarizer protective film of the present invention includes a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a cured resin with an acrylate elastic polymer.
  • the multifunctional acrylate monomer means that the acrylate functional group contains two or more and has a molecular weight of less than l, 000 g / mol. More specifically, for example, nucleic acid diol diacrylate (HDD A), tripropylene glycol diacrylate (TPGDA), ethylene glycol diacrylate (EGDA), trimethylolpropane triacrylate (TMPTA), trimethylolpropaneethoxy Triacrylate (TMPEOTA), Glycerol 3 ⁇ 4 Propoxylated Triacrylate (GPTA), Pentaerythritol Tetraacrylate (PETA), or Dipentaerytri may include nuxaacrylate (DPHA) and the like.
  • the protective film is not limited to this.
  • the multifunctional acrylate monomer crosslinks with the acrylate oligomer and the acrylate-based carbon polymer, which will be described later, and serves to provide a constant pencil 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 oligomer 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 monomer and the acrylate-based elastomer and a cured resin, and the flexibility and curl characteristics of the protective film including the same Etc. can be given.
  • 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 / m It can have a range.
  • the acrylate oligomer may be an acrylate oligomer modified with at least one of ethylene oxide, propylene oxide, or caprolactone.
  • flexibility may be further imparted to the acrylate oligomer by modification, thereby increasing curl characteristics and flexibility of the protective film.
  • the acrylate oligomers may be used alone or in combination with each other.
  • the acrylate-based elastic polymer has excellent flexibility and elasticity, and may include a acrylate functional group to crosslink and polymerize with the multifunctional acrylate monomer and the acrylate oligomer to form a crosslinked copolymer structure. Therefore, the protective film formed by using the resin composition including the same, it is possible to secure a high elasticity or flexibility while securing mechanical properties, it is possible to minimize the curl (curl) or crack (crack) generation.
  • the protective film according to the present invention includes a cured resin in which the acrylate-based elastic polymer is cross-polymerized together with the above-described multifunctional acrylate-based monomer and acrylate-based oligomer, thereby exhibiting high hardness and at the same time having flexibility. Therefore Accordingly, it can be applied as a multifunctional polarizer protective film by acting as a hard coating layer while at the same time functioning as a polarizer protective layer without a separate functional coating layer.
  • the acrylate-based elastic polymer has 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 Can be.
  • the elongation of the acrylate-based elastic polymer has the above range it can exhibit excellent flexibility and elasticity without deterioration of mechanical properties.
  • the average molecular weight of the acrylate-based elastic polymer is in the range of about 100,000 to about 800,000 g / mol, or about 150,000 to about 700,000 g / mol, or about 180,000 to about 650,000 g / m. It can have If the weight average molecular weight of the acrylate-based elastic polymer is too small, the flexibility and elasticity of the protective film manufactured using the same may not be sufficient. If the weight average molecular weight is too large, compatibility with Daron material is lowered and uniform. It may be difficult to obtain a composition, and it may be desirable to have an increase average molecular weight in the above-described range in this respect.
  • One example of the acrylate-based elastic polymer may be polyrotaxane.
  • poly-rotaxane refers to a compound in which a dumbbell shaped molecule and a cyclic compound are structurally interposed, such that the dumbbell shaped molecule is a constant linear molecule and such linear A blocking group disposed at both ends of the molecule, the linear molecule penetrating the interior of the cyclic compound, the cyclic compound can move along the linear molecule, and escape from the blocking group.
  • the polyrotasein is a cyclic compound in which a lactone compound in which an acrylate compound is introduced at the terminal is bonded; Linear molecules penetrating the cyclic compound; And a rotasein compound disposed at both ends of the linear molecule and including a blocking group to prevent the cyclic compound from being separated.
  • the cyclic compound may penetrate or surround the linear molecule It may be used without any limitation as long as it has a degree of size, and may include functional groups such as hydroxyl group, amino group, carboxyl group, thiol group or aldehyde group which can react with other polymers or compounds. Specific examples of such cyclic compounds include ⁇ -cyclodextrin, ⁇ -cyclotextrin, ⁇ -cyclodextrin, or a combination thereof.
  • linear molecule a compound having a straight chain form having a molecular weight of a predetermined or more may be used without great limitation, but a polyalkylene compound or a polycaprolactone group may be used. Specifically, a polyoxyalkylene compound containing an oxyalkylene repeating unit having 1 to 8 carbon atoms or a polycaprolactone group having a lactone repeating unit having 3 to 10 carbon atoms may be used. In addition, such linear molecules may have a weight average molecular weight of about 1,000 to about 50,000 g / n) 1. If the weight average molecular weight of the linear molecule is too small, the mechanical properties or self-healing ability of the protective film manufactured using the same may not be sufficient. If the weight average molecular weight is too large, the compatibility of the protective film to be manufactured may be degraded or the appearance may be poor. Properties and uniformity of materials can be greatly reduced.
  • the containment group can be appropriately adjusted according to the properties of the polyrotasein to be prepared, for example, one selected from the group consisting of dinitrophenyl group, cyclodextrin group, adamantane group, trityl group, fluorescein group and pyrene group or Two or more kinds can be used.
  • the acrylate-based elastic polymer is a urethane-based acrylate polymer.
  • the urethane-based acrylate polymer has a form in which a urethane-based acrylate oligomer is connected to the main chain of the acrylic polymer by a defect.
  • the protective film of this invention is the polyfunctional acrylate-type monomer mentioned above, 5-
  • An acrylate-based oligomer and an acrylate-based elastic polymer having an elongation of 200% include a cured resin cured by ultraviolet rays.
  • the protective film of this invention does not contain a triacetyl cellulose (TAC) component.
  • the polyfunctional acrylate monomer when the total weight of the cured resin is 100 parts by weight, is about 20 to about 70 By weight, about 20 to about 70 parts by weight of the acrylate oligomer having an elongation of 5 to 200%, and the acrylate-based elastic polymer may be cured in the range of about 1 to about 50 parts by weight.
  • the polyfunctional acrylate monomer is about 40 to about 60 parts by weight, and the acrylate oligomer having 5 to 200% of the god is about 20 to about 50 parts by weight.
  • the acrylate-based elastic polymer may be cured in the range of about 1 to about 30 parts by weight.
  • the protective film of the present invention may have layered flexibility without deterioration of mechanical properties.
  • the protective film of the present invention includes a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a cured resin in which an acrylate-based elastic polymer is cured, thereby providing high hardness and thinning without deterioration of optical properties. It is possible.
  • the surface hardness and scratch resistance is excellent without a separate functional coating layer such as hard coating.
  • excellent flexibility, impact resistance and flexibility are ensured, making it suitable for large area or curved displays.
  • 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.
  • 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 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 50 parts by weight, or may include about 1 to about 40 parts by weight. . By including the inorganic fine particles in the above range, a protective film excellent in both high hardness and flexibility can be provided.
  • the protective film has a thickness of about 10 or more, for example about 10 to about 200, or about 10 to about 100m, or about 10 to about 50 / im, or about 10 to It may have a thickness of about 40 / in, or 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 high hardness protective film without curling or cracking.
  • the polarizer protective film of the present invention includes the polyfunctional acrylate monomer, an acrylate oligomer having 5 to 200% of an acrylate, an acrylate elastomer, a photoinitiator, and optionally inorganic fine particles and an organic solvent.
  • the resin composition to be photocured can be formed.
  • a binder comprising a multifunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer; And a photoinitiator.
  • the multifunctional acrylate monomer the acrylate oligomer having an elongation of 5 to 200%, and the acrylate elastic polymer is as described above in the protective film.
  • the polyfunctional acrylate monomer when the total weight of the binder including the multifunctional acrylate monomer, the acrylate oligomer having an elongation of 5 to 200%, and the acrylate elastic polymer is 100 parts by weight,
  • the polyfunctional acrylate monomer may include about 20 to about 70 parts by weight, or may include about 40 to about 60 parts by weight.
  • the content of the multifunctional acrylate monomer is lower than 20 parts by weight, the crosslinking density is lowered, so that pencil hardness or The mechanical properties of the coating film, such as scratch resistance, may be lowered, and when it is more than 70 parts by weight, the coating film is brittle and cannot have sufficient flexibility.
  • the acrylate oligomer when the total amount of the binder is 100 parts by weight, may include about 20 to about 70 parts by weight, or about 20 to about 50 parts by weight. have. When the content of the acrylate oligomer is lower than 20 parts by weight. The coating may not have sufficient flexibility, and when using 70 parts by weight or more, the mechanical properties may be insufficient.
  • the binder component includes a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer, and the polyfunctional acrylate monomer and acryl
  • the cured resin cured by polymerizing a latent oligomer and an acrylate-based elastic polymer may form a protective film having a thin thickness without deteriorating optical properties.
  • 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 low enough to be substantially close to 0, and may be used for various display devices requiring low phase difference values as well as films for polarizer protection, without limitation of use.
  • including the total weight of the binder to 100 parts by weight may include a acrylate-based elastic i polymeric portion from about 1 to about 50 parts by weight, or parts of about 1 to about 30 wt. can do.
  • a acrylate-based elastic polymer in the above range it is possible to form a protective film excellent in both hardness and flexibility.
  • the above-mentioned multifunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and a binder containing an acrylate-based elastic polymer may be polymerized with each other by ultraviolet light to form a cured resin.
  • the resin composition according to the present invention includes the acrylate-based elastic polymer together with the above-described multifunctional acrylate-based monomer and acrylate-based oligomer, and thus the protective film formed by curing it exhibits high hardness. At the same time, it can be flexible. 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.
  • photoinitiator examples include 1-hydroxycyclohexyl-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, when the total weight of the binder is 100 parts by weight, the photoinitiator may include 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.
  • the valuable solvent examples include alcohol solvents such as methane, ethanol, isopropyl alcohol and butane, 2-methoxyethane, alkoxy alcohol solvents such as 2-ethoxyethanol and 1-methoxy-2-propanol, Ketone solvents such as acetone, methyl ethyl ketone, meptyl 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, di Ethylene Glycol Monomethyl Ether Ether solvents such as diethyl glycol monoethyl ether, diethyl glycol monopropyl ether, diethyl glycol monobutyl ether, diethylene glycol-2-ethyl nucleosil ether, aromatic solvents such as benzene, toluen
  • 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 particle size of nanoscale, 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 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 50 parts by weight, or About 1 to about 40 parts by weight.
  • the protective film excellent in both high hardness and flexibility can be formed.
  • the resin composition is a UV absorber, in addition to the above-mentioned polyfunctional acrylate monomer, acrylate-based oligomer having an elongation of 5 to 200%, acrylate-based elastic polymer, inorganic fine particles, photoinitiator, organic solvent, Additives commonly used in the art to which the present invention pertains include surfactants, anti-yellowing agents, leveling agents, antifouling agents, and the like. In addition, since 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 additive may include a surfactant, and the surfactant may be a 1 to 2 functional fluorine acrylate, a fluorine surfactant, or a silicone surfactant.
  • the surfactant may be included in the form of being dispersed or crosslinked in the cured resin.
  • the additive may include a yellowing inhibitor
  • the yellowing inhibitor may include a benzophenone compound or a benzotriazole compound.
  • a binder comprising a multifunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer, a photoinitiator, and optionally an organic solvent, inorganic fine particles, and other additives.
  • a polarizer protective film can be formed by photocuring the resin composition containing a.
  • the polarizer According to another aspect of the invention, the polarizer; And a protective film provided on at least one surface of the polarizer, wherein the protective film is a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer.
  • the protective film is a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer.
  • a polarizing plate containing a cured resin.
  • a binder comprising a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer; 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 binder comprising a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200%, and an acrylate elastic polymer; And the resin composition containing a photoinitiator is apply
  • 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. According to one embodiment of the invention, the release film is a polyolefin-based film such as polyester film, polyethylene film, polyethylene terephthalate film, polypropylene film.
  • the film may be a Teflon-based film, and preferably, the film may be release-treated with a silicone-based resin, melamine-based resin, or urea-based resin to facilitate peeling.
  • the thickness of the release film is not particularly limited, but a release film having a thickness of about 20 to about 200 may be mainly used.
  • the release film may be removed by peeling after curing the resin composition and 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, for example, bar coating method, knife coating method, roll coating method, blade coating method, die coating method, micro gravure coating method. Method, comma coating method, slot die coating method, lip coating method, or solution casting method may 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 can be obtained.
  • the protective film is applied to a separate release film and cured, not directly formed on the polarizer, so that 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.
  • it exhibits a low phase difference value, and has a light transmittance and a haze. It is possible to provide a high hardness polarizer protective film without deterioration in optical properties required for the polarizer protective film.
  • 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 to swell the PVA film in an aqueous solution, dyeing with a dichroic material imparting polarization to the swelled PVA film, stretching the dyed PVA film.
  • PVA polyvinyl alcohol
  • the polarizer may be formed through a stretching step of arranging the dichroic dye materials side by side in the stretching direction, and a complementary color step of correcting the 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 may have a thickness of about 10 / m or more, for example about 10 to about 100, or about 10 to about 50, or about 10 to about 4 () // m, or about 10 to about 30. .
  • the total thickness of the polarizing plate of the present invention may be about 45 / im or more, for example about 45 to about 250 // m, or about 50 to about 120 / ⁇ , or about 50 to about 100. According to the present invention, it is possible to achieve a high hardness without the occurrence of curl or crack while having a thin thickness as described above.
  • the protective film comprises a curable resin with a polyfunctional acrylate monomer, an acrylate oligomer having an elongation of 5 to 200% and an acrylate elastomer, and optionally further contains inorganic fine particles dispersed in the cured resin. It may include. A more detailed description of this and the above protection
  • the method for producing the film is as described for 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, or hot melt adhesives. 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 kPa, 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 the formed protective film on a polarizer using an adhesive agent, and adhering. At this time, the release film is. After curing of the resin composition, the protective film may be removed by being selectively peeled off before or after adhering to the polarizer.
  • 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 may be attached to another general purpose film such as TAC.
  • 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, when 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 of the polarizing plate of the present invention may be 1H or more, 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 generate a stack when it is wound around the cylindrical mandrel having a diameter of 15mm, 12mm, or 5mm.
  • 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 a6 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 a mobile communication terminal, a smart phone, other mobile devices, a display device, an electronic blackboard, an outdoor billboard, and various display units.
  • the polarizing plate may be a twisted nematic (TN), super twisted nematic (STN) liquid crystal, an in-plane switching (IPS), a super-IP S, or a fringe field switching (FFS). It may be a polarizing plate for a horizontal alignment mode such as, or may be a polarizing plate for a vertical alignment mode.
  • TN twisted nematic
  • STN super twisted nematic
  • IPS in-plane switching
  • FFS fringe field switching
  • It may be a polarizing plate for a horizontal alignment mode such as, or may be a polarizing plate for a vertical alignment mode.
  • TMPTA Trimethylolpropane triacrylate 50g, DPCA120 (Nippon
  • TMPTA 50g, DPCA12030g, TA604AU Japanese oil and fat, ethylten oxide modified
  • Trifunctional acrylate 49% elongation measured by ASTM D638, 15 g of Mw 2,300), 5 g of polyrotasein of Preparation Example 1, 6 g of photoinitiator (trade name Darocur TPO), 3 g of UV absorber (trade name Chimassorb 81), MEK lOg Combined to prepare a coating solution and bar coating on PET release film. It was dried for 2 minutes at 60 ° C, and then irradiated with black UV in a nitrogen atmosphere to obtain a protective film having a thickness of 25.
  • the coating solution was prepared by mixing 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 / / m. Comparative Example 1
  • 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 / using an acrylic adhesive, and the PET release film was peeled off.
  • Example 6 One side of the PVA film was attached to the protective film of Example 2 and the other side was attached a TAC film of 40 thickness to prepare a polarizing plate in the same manner as in Example 4.
  • Example 6 One side of the PVA film was attached to the protective film of Example 2 and the other side was attached a TAC film of 40 thickness to prepare a polarizing plate in the same manner as in Example 4.
  • 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
  • One side of the PVA film was attached to a TAC film formed with a coating of Comparative Example 1 and the other side was attached to a TAC film of 40 thickness to prepare a polarizing plate in the same manner as in Example 4.
  • Comparative Example 3 A polarizing plate was prepared by laminating a TAC film having a thickness of 40 on both sides of the PVA film by laminating with the PVA film so that the thickness of the adhesive layer was approximately 1 using an acrylic adhesive.
  • the transmittance and the haze were measured using a Hazemeter (HM 150).
  • the retardation value was measured using a phase difference measuring instrument (Axoscan).
  • the surface of the polarizing plate was reciprocated five times with a load of 500 g according to the measurement standard JIS K5400, and then the hardness without grooves was confirmed.
  • Each polarizing plate was cut into 10 cm ⁇ 10 cm, and stored at room temperature 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.
  • 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.

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/KR2014/002615 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 WO2014157964A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2016505401A JP6455993B2 (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
CN201480019011.2A CN105073797B (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
US14/781,006 US10330829B2 (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
US16/432,517 US11143796B2 (en) 2013-03-27 2019-06-05 Resin composition for a polarizer protective film
US16/432,564 US11150386B2 (en) 2013-03-27 2019-06-05 Polarizer protective film comprising a cured resin

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR10-2013-0033001 2013-03-27
KR20130033001 2013-03-27
KR20130033003 2013-03-27
KR10-2013-0033003 2013-03-27
KR1020140035586A KR101600582B1 (ko) 2013-03-27 2014-03-26 편광자 보호 필름용 수지 조성물
KR1020140035587A KR101586843B1 (ko) 2013-03-27 2014-03-26 편광자 보호 필름, 이를 포함하는 편광판 및 편광판의 제조방법
KR10-2014-0035587 2014-03-26
KR10-2014-0035586 2014-03-26

Related Child Applications (3)

Application Number Title Priority Date Filing Date
US14/781,006 A-371-Of-International US10330829B2 (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
US16/432,517 Division US11143796B2 (en) 2013-03-27 2019-06-05 Resin composition for a polarizer protective film
US16/432,564 Division US11150386B2 (en) 2013-03-27 2019-06-05 Polarizer protective film comprising a cured resin

Publications (1)

Publication Number Publication Date
WO2014157964A1 true WO2014157964A1 (fr) 2014-10-02

Family

ID=51624827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2014/002615 WO2014157964A1 (fr) 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

Country Status (1)

Country Link
WO (1) WO2014157964A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017048288A (ja) * 2015-09-01 2017-03-09 Ｋｊケミカルズ株式会社 モデル材用活性エネルギー線硬化性樹脂組成物
CN107850712A (zh) * 2015-09-15 2018-03-27 株式会社Lg化学 偏光元件保护膜、包括其的偏光板和包括偏光板的液晶显示装置
US20190094612A1 (en) * 2016-05-02 2019-03-28 Lg Chem, Ltd. Polarizing plate, and liquid crystal display comprising same
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009204725A (ja) * 2008-02-26 2009-09-10 Fujifilm Corp ハードコートフィルム、偏光板、および画像表示装置
KR20090101763A (ko) * 2008-03-24 2009-09-29 동우 화인켐 주식회사 광제어 초박형 편광판 및 이를 구비한 액정표시장치
JP2010072111A (ja) * 2008-09-16 2010-04-02 Dainippon Printing Co Ltd 偏光子保護用光学フィルム、偏光板、及び画像表示装置
JP2012078541A (ja) * 2010-09-30 2012-04-19 Fujifilm Corp 光学フィルム、偏光板、画像表示装置、及び光学フィルムの製造方法
JP2012098721A (ja) * 2010-10-08 2012-05-24 Fujifilm Corp 光学フィルムの製造方法、及びその製造方法で製造された光学フィルム、並びにそれを有する偏光板、及び画像表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009204725A (ja) * 2008-02-26 2009-09-10 Fujifilm Corp ハードコートフィルム、偏光板、および画像表示装置
KR20090101763A (ko) * 2008-03-24 2009-09-29 동우 화인켐 주식회사 광제어 초박형 편광판 및 이를 구비한 액정표시장치
JP2010072111A (ja) * 2008-09-16 2010-04-02 Dainippon Printing Co Ltd 偏光子保護用光学フィルム、偏光板、及び画像表示装置
JP2012078541A (ja) * 2010-09-30 2012-04-19 Fujifilm Corp 光学フィルム、偏光板、画像表示装置、及び光学フィルムの製造方法
JP2012098721A (ja) * 2010-10-08 2012-05-24 Fujifilm Corp 光学フィルムの製造方法、及びその製造方法で製造された光学フィルム、並びにそれを有する偏光板、及び画像表示装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017048288A (ja) * 2015-09-01 2017-03-09 Ｋｊケミカルズ株式会社 モデル材用活性エネルギー線硬化性樹脂組成物
CN107850712A (zh) * 2015-09-15 2018-03-27 株式会社Lg化学 偏光元件保护膜、包括其的偏光板和包括偏光板的液晶显示装置
CN107850712B (zh) * 2015-09-15 2021-03-12 株式会社Lg化学 偏光元件保护膜、包括其的偏光板和包括偏光板的液晶显示装置
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
US20190094612A1 (en) * 2016-05-02 2019-03-28 Lg Chem, Ltd. Polarizing plate, and liquid crystal display comprising same
JP2019512723A (ja) * 2016-05-02 2019-05-16 エルジー・ケム・リミテッド 偏光板およびこれを含む液晶ディスプレイ装置
US10739636B2 (en) * 2016-05-02 2020-08-11 Lg Chem, Ltd. Polarizing plate, and liquid crystal display comprising same

Similar Documents

Publication Publication Date Title
JP6317746B2 (ja) ハードコーティングフィルムを含む偏光板
CN110452405B (zh) 制备硬涂膜的方法
TWI500669B (zh) 硬塗膜
KR101586843B1 (ko) 편광자 보호 필름, 이를 포함하는 편광판 및 편광판의 제조방법
KR101748409B1 (ko) 편광자 보호 필름용 수지 조성물, 편광자 보호 필름, 및 이를 포함하는 편광판
US11125918B2 (en) 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
US11143796B2 (en) Resin composition for a polarizer protective film
JP2015533677A (ja) ハードコーティングフィルム
JP2015531021A (ja) ハードコーティング組成物
JP2016538160A (ja) プラスチックフィルム積層体
JP2016516846A (ja) プラスチックフィルム
WO2014157964A1 (fr) 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
KR101656454B1 (ko) 편광자 보호 필름 및 이를 포함하는 편광판
KR101586845B1 (ko) 편광자 보호 필름, 이를 포함하는 편광판 및 편광판의 제조방법
WO2014157963A1 (fr) 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
KR101600582B1 (ko) 편광자 보호 필름용 수지 조성물
WO2016018103A1 (fr) Composition de résine pour film protecteur de polariseur, film protecteur de polariseur, et plaque polarisante le comprenant
KR101600584B1 (ko) 편광자 보호 필름용 수지 조성물

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201480019011.2

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14772833

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016505401

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 14781006

Country of ref document: US

122 Ep: pct application non-entry in european phase

Ref document number: 14772833

Country of ref document: EP

Kind code of ref document: A1