WO2013051802A1 - Composition de résine pour un film optique, et film de retardement utilisant une telle composition - Google Patents

Composition de résine pour un film optique, et film de retardement utilisant une telle composition Download PDF

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Publication number
WO2013051802A1
WO2013051802A1 PCT/KR2012/007610 KR2012007610W WO2013051802A1 WO 2013051802 A1 WO2013051802 A1 WO 2013051802A1 KR 2012007610 W KR2012007610 W KR 2012007610W WO 2013051802 A1 WO2013051802 A1 WO 2013051802A1
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Prior art keywords
optical film
weight
molecular weight
film
styrene
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PCT/KR2012/007610
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English (en)
Korean (ko)
Inventor
박준욱
곽상민
엄준근
이남정
윤석일
Original Assignee
주식회사 엘지화학
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Priority claimed from KR1020120102983A external-priority patent/KR101418755B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to US13/981,595 priority Critical patent/US9297944B2/en
Priority to JP2014506354A priority patent/JP2014513815A/ja
Priority to CN201280018271.9A priority patent/CN103492479B/zh
Publication of WO2013051802A1 publication Critical patent/WO2013051802A1/fr

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Classifications

    • 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
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/08—Copolymers of styrene, e.g. AS or SAN, i.e. acrylonitrile styrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/08—Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Definitions

  • the present invention relates to a resin composition for an optical film and a compensation film using the same, and more particularly, to a resin composition for an optical film and a compensation film using the same having excellent mechanical properties and suitable optical properties for a compensation film for an IPS mode. It is about.
  • BACKGROUND ART Liquid crystal displays have a lower power consumption, smaller volume, and lighter weight than portable cathode ray tube displays.
  • a liquid crystal display has polarizing plates installed on both sides of a liquid crystal cell in which liquid crystal is filled, and the direction of liquid crystal alignment inside the liquid crystal cell changes depending on whether an electric field of the liquid crystal cell is applied, and thus light from the liquid crystal cell is selectively emitted from the polarizing plate. It is a device driven by being penetrated or blocked.
  • Double Domain Twisted Nematic TN
  • ASM axially symmetric aligned microcell
  • OBC optically compensated blend
  • VA vertical alignment
  • MVA multidomain VA
  • SE surround electrode
  • SE patterned VA
  • IPS in-plane switching
  • FFS fringe-field switching
  • the phase difference between the light incident perpendicularly to the liquid crystal cell and the light incident in the oblique direction is different.
  • the light incident in the oblique direction cannot be completely transmitted or blocked by the polarizing plate.
  • the contrast ratio is lowered, or the gray scale inversion is generated. Therefore, various compensation films are currently used to compensate for the phase difference due to the optical anisotropy of the liquid crystal cell, and the characteristics of the compensation film required according to the mode of the liquid crystal cell are different.
  • the optical anisotropy at the inclination angle in the non-driving state is not as large as that of other modes, and thus the optical viewing angle of a certain level or more can be secured only by using the optical isotropic protective film. It is known. However, also in this case, light leakage due to the angle change between the first polarizer and the second polarizer absorption axis at the inclination angle, and consequently, the contrast decrease.
  • the first and second polarizers located on both sides of the liquid crystal cell are arranged so that the absorption axes are perpendicular to each other, so that all of the light is blocked in the non-driven state in the front, but in the oblique direction, the angle between the two polarizer absorption axes is geometrically increased as the inclination angle increases. Because of the increase in light, light is not completely blocked and light leakage occurs.
  • the IPS mode liquid crystal display also needs to realize a perfect wide viewing angle.
  • the polarization between the polarizers according to the inclination angle must be compensated using an appropriate retardation film.
  • a phase difference compensation layer that satisfies the condition x > n z > n y is required.
  • n x , n y , and n z represent the refractive indices in each direction of the film
  • the x, y, and z directions represent the direction in which the refractive index is largest in the film plane, the direction perpendicular to the x direction in the plane, and the thickness direction, respectively. .
  • Such a birefringent retardation film cannot be implemented by a general uniaxial / biaxial stretching process, and therefore, a three-dimensional method such as a method of inducing excessive width shrinkage during stretching using a shrink film and a method of applying a strong electric field to the stretched film Special methods for controlling the refractive index have been proposed, but until now, there have been limitations in the continuous production of wide films due to various technical and equipment problems.
  • Representative structures include structures in which liquid crystals are vertically aligned on an A-plate prepared by uniaxially stretching a polymer film having an amount of birefringence such as polycarbonate or a cycloolefin-based polymer.
  • the liquid crystal alignment layer since the rod-shaped low molecular weight or high molecular weight liquid crystal molecules are precisely coated on the transparent support with a thickness of several micro levels, the coating process costs are incurred and the relative difference is caused by the slight difference in the coating thickness.
  • there are various problems such as a large retardation nonuniformity and an optical defect due to foreign matter such as dust remaining on the surface of the coating substrate film or present in the liquid crystal solution.
  • the present invention is to solve the above problems, to provide a resin composition for an optical film and a compensation film using the same, which is excellent in mechanical properties, particularly toughness, and has an optical property suitable for the compensation film for IPS mode.
  • the present invention in one aspect, 40 to 94% by weight acrylic resin; 5 to 40% by weight of a styrene-acrylonitrile copolymer having a weight average molecular weight of less than 1 million; And it provides a composition for an optical film comprising 1 to 20% by weight of ultra high molecular weight styrene-acrylonitrile copolymer having a weight average molecular weight of 1 million to 9 million.
  • the content of acrylonitrile may be 15 to 26% by weight.
  • the content of acrylonitrile may be 15 to 26% by weight.
  • the acrylic resin may be a copolymer of a (meth) acrylic monomer and a cyclic monomer.
  • the cyclic monomer may be maleic anhydride, maleimide, glutaric anhydride, glutalimide, lactam, or derivatives thereof.
  • the styrene-acrylonitrile copolymer having a weight average molecular weight of less than 1 million may include alpha-methyl styrene units.
  • the ultra high molecular weight styrene-acrylonitrile copolymer having the weight average molecular weight of 1 to 9 million may include alpha-methyl styrene units.
  • the acrylic resin may also comprise styrene units, in particular alpha-methyl styrene units.
  • the present invention provides an optical film produced by biaxially stretching the composition for an optical film.
  • the stretching may be performed in the range of Tg ⁇ Tg + 20 °C of the composition.
  • the biaxial stretching may be performed in MD stretching ratio 1.5 ⁇ 2.0 times, TD stretching ratio 2.0 ⁇ 4.0 times.
  • the optical film of the present invention may have a thickness of 20 ⁇ 150um.
  • the optical film may have an in-plane retardation value of 50 to 200 nm.
  • R th / R in value of the optical film may be 1.0 to 2.0.
  • the optical film may have a light transmittance of 90% or more and a haze value of 2.5% or less.
  • optical film of the present invention having the above characteristics can be usefully used as an IPS-LCD compensation film.
  • the resin composition for optical films of this invention When the resin composition for optical films of this invention is used, it is possible to manufacture the optical film with little haze, excellent optical transparency, and greatly improved toughness. Therefore, when the polarizing plate is manufactured using a conventional acrylic film as a protective film, the slicing, pressing, bending, and surface protruding of the protective film may cause the occurrence of unevenness or breakage due to local irregularities in the interface adhesive layer between the polarizer and the protective film. The defective rate is greatly improved.
  • the optical characteristic suitable as an IPS mode compensation film can be obtained.
  • the resin composition for an optical film of this invention is (1) 40-94 weight% (meth) acrylic-type resin (2) 5-40 weight% of styrene-acrylonitrile copolymers with a weight average molecular weight less than 1 million, and (3) weight average It is characterized by comprising 1 to 20% by weight of ultra high molecular weight styrene-acrylonitrile copolymer having a molecular weight of 1 to 9 million.
  • copolymer means that two or more kinds of monomers are included as repeating units, and the form thereof is not particularly limited, and any type of copolymer, for example, an alternating copolymer, a block copolymer, It should be understood as a concept that includes both random copolymers and graft copolymers.
  • the said (1) (meth) acrylic-type resin is for ensuring optical characteristics and durability, and in this invention, what is well-known in the said technical field can be used as said (meth) acrylic-type resin.
  • a homo or copolymer of a (meth) acrylic monomer, a copolymer of a (meth) acrylic monomer and an aromatic vinyl monomer, a copolymer of a (meth) acrylic monomer, an aromatic vinyl monomer and an acid anhydride, and a (meth) acrylic series Copolymers of monomers and cyclic monomers and the like may be used, and among these, particularly preferred is a copolymer of a (meth) acrylic monomer and a cyclic monomer.
  • the (meth) acrylic monomer is sufficient as long as it is a compound having a double bond between the carbonyl group of the ester group and the conjugated (conjugated) carbons, and its substituent is not particularly limited.
  • the (meth) acrylic monomers described herein are meant to include not only acrylates but also acrylate derivatives, and should be understood as concepts including alkylacrylates, alkylmethacrylates, alkylbutacrylates, and the like.
  • the (meth) acrylic monomers include at least one acrylic type selected from the group consisting of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, methyl methacrylate, and ethyl acrylate.
  • Monomers may be used, in particular the use of methyl methacrylate (MMA) is most preferred.
  • aromatic vinyl monomer it is preferable to use a monomer having a structure in which a benzene nucleus or vinyl group is substituted or unsubstituted with at least one C 1 to C 5 alkyl group or halogen group.
  • a monomer having a structure in which a benzene nucleus or vinyl group is substituted or unsubstituted with at least one C 1 to C 5 alkyl group or halogen group for example, one or more styrene monomers selected from the group consisting of styrene, ⁇ -methylstyrene, p-methylstyrene, vinyltoluene and the like are preferable.
  • Carboxylic anhydride can be used as said acid anhydride, and monovalent, divalent or more polyvalent carboxylic anhydride can be used.
  • maleic anhydride maleimide, glutaric anhydride, glutalimide, lactam, or derivatives thereof
  • a maleimide monomer is more preferable.
  • the maleimide monomers include, but are not limited to, N-cyclohexylmaleimide, N-phenylmaleimide, N-methylmaleimide, N-butylmaleimide or derivatives thereof, and in particular, N-cyclohexyl Most preferred are maleimides or derivatives thereof.
  • the content of the cyclic monomer in the copolymer of the (meth) acrylic monomer and the cyclic monomer is 1 to 50% by weight, which is advantageous to lower the haze value of the film.
  • the said acrylic resin contains the copolymer which has a styrene unit, especially an alpha-methyl styrene unit.
  • a heat resistance improving effect can be obtained.
  • the content of the acrylic resin is about 40 to 94% by weight, more preferably about 50 to 90% by weight based on the total content of the composition.
  • the content of the acrylic resin is less than 40% by weight, high transparency and high durability of the acrylic polymer may not be sufficiently expressed.
  • the content of the acrylic resin exceeds 94% by weight, it may be difficult to produce a desired phase difference film due to the lack of retardation expression. .
  • the acrylic resin composition preferably has a weight average molecular weight of about 50,000 to about 500,000, and a glass transition temperature is preferably 100 ° C. or more and less than 200 ° C.
  • a glass transition temperature is less than 100 °C, the heat resistance is insufficient to easily cause deformation and retardation change of the film during the manufacturing process of the polarizing plate, when the temperature is 200 °C or more generally poor melt processability.
  • composition of this invention contains the styrene-acrylonitrile copolymer (2) whose weight average molecular weight is less than 1 million.
  • the styrene-acrylonitrile copolymer (hereinafter, referred to as 'low molecular weight styrene-acrylonitrile copolymer') having a weight average molecular weight of less than 1 million is used to impart negative birefringence to the optical film, and the content thereof is the whole composition
  • the content is about 5 to 40% by weight, preferably 10 to 30% by weight. If the content of the low molecular weight styrene-acrylonitrile copolymer is less than 5% by weight, the desired retardation value cannot be obtained. If the content of the low-molecular weight styrene-acrylonitrile copolymer is less than 5% by weight, the glass transition temperature of the entire resin composition is lowered, which adversely affects heat resistance and durability. Because it can.
  • the content of acrylonitrile is preferably about 15 to 26% by weight, more preferably about 18 to 24% by weight.
  • the content of acrylonitrile in the low molecular weight styrene-acrylonitrile copolymer is within the above range, a film having no haze and excellent transparency can be obtained, and when the content is too high, compatibility with the acrylic resin may deteriorate. Because.
  • the resin composition of this invention contains the ultrahigh molecular weight styrene- acrylonitrile copolymer (3) whose weight average molecular weight is 1 million or more.
  • the ultra-high molecular weight styrene-acrylonitrile copolymer is for improving the toughness of the resin composition, the content of which is about 1 to 20% by weight, more preferably about 2 to 10% by weight based on the total content of the composition It is good. If the content of the ultra-high molecular weight styrene-acrylonitrile copolymer is less than 1% by weight, the effect of improving toughness is insignificant, and if it is more than 20% by weight, the melt viscosity of the resin composition may increase rapidly, resulting in poor workability.
  • the content of acrylonitrile nitrile is preferably about 15 to 26% by weight, preferably about 18 to 24% by weight. This is because when the content of acrylonitrile is in the above range, there is no haze, and a film having excellent transparency can be obtained, and when the content is too high, compatibility with the acrylic resin may deteriorate.
  • the styrene unit includes substituted or unsubstituted styrene, and may be, for example, styrene, alpha-methyl styrene, or vinyl phenol. It is not limited to this. In particular, when the alpha-methyl styrene unit is included, the effect of improving heat resistance is excellent.
  • the resin composition for an optical film of the present invention can be prepared by blending the above components according to methods well known in the art, such as compounding method using a melt extruder.
  • a heat stabilizer, a lubricant, an antioxidant, a UV stabilizer, etc. may be further added to the resin composition within a range that does not impair the physical properties of the composition.
  • the resin composition for an optical film of the present invention as described above can be prepared into an optical film using a film production method well known in the art, such as solution casing method or extrusion method, for example, vacuum drying the resin composition After removing moisture and dissolved oxygen, supplying the extruder to a single or twin extruder substituted with nitrogen from the raw material hopper, melting at high temperature to obtain raw material pellets, and vacuum drying the obtained raw material pellets from the raw material hopper to the extruder. After melting with a single extruder substituted with nitrogen, it is passed through a coat hanger-type T-die, and through the chrome-plated casting rolls, drying rolls, etc. to produce a film, the film thus produced is biaxial for phase difference expression Stretched. At this time, an improvement agent etc. can be added as needed.
  • a film production method well known in the art such as solution casing method or extrusion method, for example, vacuum drying the resin composition
  • the stretching may be sequentially performed in the longitudinal direction (MD) stretching or in the transverse direction (TD) stretching, or may be performed simultaneously.
  • the stretching may be carried out in one step, or may be carried out in multiple steps.
  • the stretching is preferably performed at a temperature of about Tg ° C to (T + 20) ° C when the glass transition temperature of the resin composition is Tg, more preferably (Tg + 2) ° C to (T + 15). It is preferably carried out at a temperature of about °C. This is because when the stretching temperature is less than Tg, there is a high risk of breakage, and when the stretching temperature is higher than (T + 20) ° C, the phase difference expression property is lowered.
  • the glass transition temperature refers to a region from the temperature at which the storage modulus of the resin composition begins to decrease, and thus the loss modulus becomes larger than the storage modulus, to a temperature at which the orientation of the polymer chain is relaxed and disappears, and the differential scanning calorimeter (DSC) Can be measured by
  • a transverse direction (TD) draw ratio is larger than a longitudinal direction (MD) draw ratio. More specifically, the longitudinal direction (MD) stretching ratio may be 1.5 to 2.0 times. It is preferable that a transverse direction (TD) draw ratio is about 2.0 to 4.0 times. If the longitudinal draw ratio is less than 1.5, toughness and lateral tear strength become weak, and if it exceeds 2.0, in-plane retardation expression is greatly reduced.
  • the draw ratio refers to the ratio of the length after drawing to the length before drawing, that is (length after drawing / length before drawing), but in the case of a roll-to-roll longitudinal drawing when calculated in an actual continuous process
  • the ratio of the roll speed after stretching to the previous roll speed is used as the stretching ratio
  • the ratio of the outlet width to the tenter inlet width is usually defined as the stretching ratio.
  • the stretching speed is not particularly limited, it is preferable to perform the stretching operation in the range of 1 to 10 m / min in the case of small-scale stretching equipment having a width of 800 mm or less and in the range of 5 to 80 m / min in the case of further mass production equipment.
  • the optical film of this invention manufactured by the above method is not specifically limited, It is preferable that the final thickness after extending
  • the thickness of the film is less than 20 ⁇ m, element shrinkage, element cracks, curls, and the like tend to occur after polarizing plate lamination.
  • a separate protective film a large number of integrated polarizing plates having a compensation film functioning as a protective film has been manufactured.
  • the film thickness is too thin, there is a problem that it is difficult to support the polarizing element. .
  • the thickness is more than 150 ⁇ m large amount of heat is required for uniform stretching, high-speed stretching is not only difficult and economical.
  • the optical transmittance of the optical film is 90% or more, haze (haze) characteristics may be in the range of 2.5% or less, preferably 1% or less, more preferably 0,5% or less.
  • haze haze characteristics
  • the transmittance of the optical film is less than 90% and the haze is more than 2.5%, the brightness of the liquid crystal display device in which such an optical film is used may decrease.
  • the optical film of the present invention having the above characteristics can be used as a compensation film for improving the viewing angle of the IPS mode liquid crystal display.
  • the stretched film should have an appropriate retardation value.
  • the value can be controlled by adjusting the stretching conditions such as the styrene-acrylonitrile copolymer content in the resin, the stretching temperature and the stretching ratio.
  • the in-plane retardation value R in is preferably about 50 to 200 nm, and more preferably about 70 to 160 nm.
  • the thickness direction retardation value R th of the optical film is the same as the in-plane retardation value when only uniaxial stretching is performed, and when biaxial stretching is performed, the in-plane retardation value is closer to the same ratio as the draw ratio in the MD and TD directions. It becomes small and the thickness direction retardation value becomes large.
  • the ratio (R th / R in ) of the thickness retardation value and the planar retardation value is preferably 1.0 to 2.5, more preferably 1.0 to 2.0.
  • planar retardation value R in refers to a value defined by the following [Formula 1]
  • thickness direction retardation value R th refers to a value defined by the following [Formula 2].
  • measurement reference wavelength of the said planar phase difference value and the thickness direction phase difference value is 550 nm.
  • n x is a refractive index of the direction of the largest refractive index in the plane direction of the film
  • n y is the refractive index of the vertical direction of the nx direction in the plane direction of the film
  • n z is the refractive index in the thickness direction
  • d is the thickness of the film.
  • Retardation The retardation measurement of the film was measured by Axoscan of Axometrics.
  • Toughness Folded in the MD and TD direction of the film was measured by the occurrence of fracture when pressed by hand. The test was performed five times, and when all five failures were not issued, it was evaluated as good, good when one break occurred, and poor when two or more breaks occurred.
  • the unstretched film of width 800mm was produced using the T-die film making machine with 250 degreeC and 250 rpm conditions with the said resin composition.
  • the unstretched film was stretched 1.4 times in a roll-to-roll manner in the MD direction at a temperature of Tg + 5 ° C., and then stretched 2.8 times in the TD direction using a tenter stretching machine at the same temperature.
  • the retardation value, transmittance, haze and toughness of the obtained final stretched film were measured, and the measurement results are shown in [Table 1].
  • the stretched film had a high retardation value of R in and R th of 113 nm and 169 nm, and also had good transmittance and Haze. In particular, when both the MD and TD directions were folded, it was confirmed that the film was not broken and the toughness was excellent.
  • a stretched film was prepared under the same conditions as in Example 1 except that the input weight ratios of PMMA 830HR, SAN80HF, and ultrahigh molecular weight Blendex-869 were 79: 18: 3, and the retardation value, transmittance, haze, and toughness were measured. The measurement results are shown in [Table 1]. As shown in Table 1, all of the retardation value, the optical characteristic and the toughness were good.
  • Styrene-acrylonitrile copolymer was used in place of SAN80HF and SAN82TR (LG Chemical Co., Ltd., acrylonitrile content 19% by weight) was used to set the weight ratio of PMMA830HR, SAN82TR and ultra high molecular weight Blendex-869 to 80: 15: 5, and MD.
  • TD direction draw ratios were 1.6 times and 3.2 times, respectively, except that stretched films were prepared under the same conditions as in Example 1, and the retardation value, transmittance, haze and toughness were measured. The measurement results are shown in [Table 1]. As shown in Table 1, all of the retardation value, the optical characteristic and the toughness were good.
  • a stretched film was produced in the same manner as in Example 1 except that the input weight ratio of PMMA 830HR, SAN80HF, and ultrahigh molecular weight Blendex-869 was 93: 4: 3, and the draw ratio in the MD and TD directions was 1.5 times 3.0 times, respectively, and the phase difference value was , Transmittance, haze and toughness were measured.
  • the measurement results are shown in [Table 1]. As shown in Table 1, the transparency and toughness were excellent, but the phase difference was not largely expressed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)

Abstract

Selon un aspect, la présente invention concerne une composition pour un film optique comportant: entre 40 et 94 % en poids d'une résine acrylique ; entre 5 et 40 % d'un copolymère styrène-acrylonitrile ayant une masse moléculaire moyenne en poids inférieure à 1,000,000 ; et entre 1 et 20 % en poids d'un copolymère de masse moléculaire très élevée ayant une masse moléculaire moyenne en poids entre 1,000,000 et 9,000,000, ainsi qu'un film optique utilisant une telle composition.
PCT/KR2012/007610 2011-10-05 2012-09-21 Composition de résine pour un film optique, et film de retardement utilisant une telle composition WO2013051802A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/981,595 US9297944B2 (en) 2011-10-05 2012-09-21 Resin composition for optical film and compensation film using the same
JP2014506354A JP2014513815A (ja) 2011-10-05 2012-09-21 光学フィルム用樹脂組成物及びこれを用いた補償フィルム
CN201280018271.9A CN103492479B (zh) 2011-10-05 2012-09-21 用于光学膜的树脂组合物及使用该组合物的补偿膜

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KR20110101279 2011-10-05
KR10-2011-0101279 2011-10-05
KR1020120102983A KR101418755B1 (ko) 2011-10-05 2012-09-17 광학 필름용 수지 조성물 및 이를 이용한 보상필름
KR10-2012-0102983 2012-09-17

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Citations (5)

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KR20020054688A (ko) * 2000-12-28 2002-07-08 안복현 진공성형성이 우수한 스티렌계 열가소성 수지 조성물
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