WO2011155771A2 - 내열성·고강도 아크릴계 공중합체, 및 이를 포함하는 광학필름 - Google Patents
내열성·고강도 아크릴계 공중합체, 및 이를 포함하는 광학필름 Download PDFInfo
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- WO2011155771A2 WO2011155771A2 PCT/KR2011/004212 KR2011004212W WO2011155771A2 WO 2011155771 A2 WO2011155771 A2 WO 2011155771A2 KR 2011004212 W KR2011004212 W KR 2011004212W WO 2011155771 A2 WO2011155771 A2 WO 2011155771A2
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- methacrylate
- acrylic copolymer
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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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- 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
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- 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
-
- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1806—C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate
Definitions
- the present invention relates to a heat resistant high strength acrylic copolymer, and an optical film comprising the same.
- twisting films are used for polarizing films, polarizer protective films, retardation films, plastic substrates, light guide plates, and the like.
- Twisted nematic (TN), super twisted nematic (STN) Various modes of liquid crystal display using vertical alignment (VA), in-plane switching (IPS) liquid crystal cells, and the like have been developed. All of these liquid crystal cells have inherent liquid crystal arrays, and have inherent optical anisotropy. In order to compensate for this optical anisotropy, films have been proposed in which various kinds of polymers are stretched to impart a retardation function.
- the liquid crystal display uses high birefringence characteristics and orientations of the liquid crystal molecules, the refractive index varies according to the viewing angle, and thus the color and brightness of the screen change.
- the refractive index varies according to the viewing angle, and thus the color and brightness of the screen change.
- a compensation film having a negative phase difference in the thickness direction is required to compensate for this.
- the front of the two polarizers orthogonal to each other do not pass light, but when the angle is inclined, the optical axis of the two polarizers are not orthogonal to cause light leakage.
- the display device using the liquid crystal requires both phase difference compensation in the thickness direction and plane direction difference compensation in order to widen the viewing angle.
- a requirement for retardation compensation films is that birefringence must be easily controlled.
- the birefringence of the film is made not only by the fundamental birefringence of the material but also by the orientation of the polymer chain in the film. Orientation of the polymer chain is mostly caused by the force applied from the outside or due to the inherent properties of the material, the method of aligning the molecule by the external force is to stretch the polymer film uniaxially or biaxially.
- N-TAC, V-TAC, and COP films have recently been used as compensation films or retardation films.
- these films have a problem of high cost and complicated manufacturing process.
- An object of the present invention for solving the problems of the prior art as described above is to provide an acrylic copolymer resin having excellent heat resistance while maintaining transparency.
- Still another object of the present invention is to provide a resin composition for an optical film comprising the acrylic copolymer resin and a resin containing an aromatic ring and / or an aliphatic ring in the main chain.
- Still another object of the present invention is to provide an optical film having excellent heat resistance and optical transparency including the resin composition for optical films, and a liquid crystal display device comprising the optical film.
- the present invention has been made to solve the above problems of the prior art,
- alkyl (meth) acrylate monomers 1) alkyl (meth) acrylate monomers; 2) (meth) acrylate monomers including aliphatic rings and / or aromatic rings; And 3) an acrylic copolymer for a polymerized optical film including a (meth) acrylamide monomer.
- the present invention also provides a compounding resin in which the acrylic copolymer for an optical film of the present invention and a resin containing an aromatic ring and / or an aliphatic ring in the main chain are mixed.
- the acrylic copolymer for an optical film according to the present invention is excellent in heat resistance while maintaining transparency.
- the optical film including the compounding resin containing the acrylic copolymer for the optical film is excellent in transparency and heat resistance, and excellent in workability, adhesion, retardation characteristics and durability.
- alkyl (meth) acrylate monomers 1) alkyl (meth) acrylate monomers; 2) (meth) acrylate monomers including aliphatic rings and / or aromatic rings; And 3) an acrylic copolymer for an optical film polymerized including a (meth) acrylamide monomer.
- the copolymer resin containing a monomer means that the monomer is polymerized and included as a repeating unit in the copolymer resin.
- a "(meth) acrylate type monomer” means a “acrylate type monomer” or a “methacrylate type monomer”.
- a "(meth) acrylamide monomer” includes a “acrylamide monomer” or a “methacrylamide monomer”.
- the acrylic copolymer may be a block copolymer or a random copolymer, but the copolymer form is not limited thereto.
- an alkyl (meth) acrylate monomer means both an alkyl acrylate monomer and an alkyl methacrylate monomer. It is preferable that the alkyl group of the said alkyl (meth) acrylate type monomer is C1-C10, It is more preferable that it is C1-C4, It is more preferable that it is a methyl group or an ethyl group.
- the alkyl methacrylate monomer is more preferably methyl methacrylate, but is not limited thereto.
- the content of the alkyl methacrylate monomer is preferably 50 to 98.9% by weight, more preferably 50 to 90% by weight.
- the content of the alkyl methacrylate monomer is within the above range, excellent transparency may be maintained while heat resistance.
- the (meth) acrylate monomer containing an aliphatic ring and / or an aromatic ring serves to increase compatibility with the resin containing an aromatic ring and / or an aliphatic ring in the main chain, and examples
- it may be a cycloalkyl (meth) acrylate monomer or an aryl (meth) acrylate monomer.
- the cycloalkyl group of the cycloalkyl (meth) acrylate monomer is preferably 4 to 12 carbon atoms, more preferably 5 to 8 carbon atoms, and most preferably a cyclohexyl group.
- the aryl group of the aryl (meth) acrylate monomer is preferably 6 to 12 carbon atoms, most preferably a phenyl group.
- (meth) acrylate monomers including the aliphatic ring and / or the aromatic ring include cyclopentyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, cyclohexyl acrylate and 2-phenoxyethyl acryl.
- cyclohexyl methacrylate or phenyl methacrylate are preferred, but not limited thereto.
- the content of the (meth) acrylate monomer containing the aliphatic ring and / or the aromatic ring is preferably more than 0% by weight and less than 50% by weight, more than 0% by weight and 30% by weight or less. More preferred.
- heat resistance can be sufficiently secured.
- the (meth) acrylamide-based monomer plays a role in making the copolymer of the present invention exhibit higher heat resistance and strength.
- the (meth) acrylamide-based monomers include, but are not limited to, N-substituted methacrylamide, methacrylamide including aliphatic rings and / or aromatic rings.
- Substituents of the N-substituted methacrylamide include, but are not limited to, ethyl, isopropyl, tert-butyl, cyclohexyl, benzyl, phenyl, and the like.
- the methacrylamide is preferably included 0.1 to 10% by weight.
- the weight average molecular weight of the acrylic copolymer resin is preferably 50,000 to 500,000 in terms of heat resistance, processability and productivity.
- Glass transition temperature (Tg) of the said acrylic copolymer resin becomes like this. Preferably it is 120 degreeC or more, More preferably, it is 130 degreeC or more.
- the glass transition temperature of the acrylic copolymer resin is not particularly limited, but may be 200 ° C. or less.
- the second aspect of the present invention relates to a compounding resin in which the acrylic copolymer of the first aspect of the present invention and a resin containing an aromatic ring and / or an aliphatic ring in the main chain are mixed.
- the resin composition as the resin containing an aromatic ring and / or an aliphatic ring in the main chain, for example, polycarbonate resin, polyarylate resin, polynaphthalene resin, polynorbornene resin, or the like can be used. Although it is more preferable that it is a carbonate resin, it is not limited only to this.
- the weight ratio of acrylic copolymer resin and resin which contains an aromatic ring and / or an aliphatic ring in a principal chain is 60-99.9: 0.1-40, and, as for the said resin composition, it is more preferable that it is 70-99: 1-30. .
- the resin composition may be prepared by blending the acrylic copolymer resin with a resin containing an aromatic ring and / or an aliphatic ring in the main chain according to a method well known in the art, such as compounding, and may be a colorant, flame retardant, reinforcing agent, 0.001 to 70 parts by weight of additives well known in the art, such as fillers, UV stabilizers, antioxidants and the like.
- the glass transition temperature of the said resin composition is not specifically limited, It may be 200 degrees C or less.
- the weight average molecular weights of the said resin composition are 50,000-500,000 in terms of heat resistance, sufficient workability, productivity, etc.
- a third aspect of the invention relates to an optical film comprising the compounding resin.
- the optical film according to the present invention may have different retardation values depending on the content of the resin containing an aromatic ring and / or an aliphatic ring in the main chain, and thus may be used as a retardation compensation film or a protective film.
- the retardation compensation film may be used in the VA mode type or the TN mode type according to the retardation value.
- the optical film according to the present invention may have a plane direction retardation value (R in ) of 30 nm to 80 nm and a thickness direction retardation value (R th ) of -50 nm to -300 nm, in which case it may be used as a VA mode type retardation compensation film.
- the optical film according to the present invention may have a plane direction retardation value R in of 150 nm to 200 nm and a thickness direction retardation value R th of ⁇ 90 nm or less, that is, an absolute value of 90 or more of the thickness direction retardation value, in this case. It can be used as a TN mode retardation compensation film.
- the thickness direction retardation value (R th ) is more preferably -90nm to -150nm.
- the plane direction retardation value (R in ) of the optical film may be 30nm to 80nm
- the thickness direction retardation value R th may be -50 nm to -300 nm.
- the optical film according to the present invention can be used as a VA mode type phase difference compensation film.
- the plane direction retardation of the optical film may be 0 nm to 10 nm, preferably 0 nm to 5 nm, more preferably about 0 nm, and the thickness direction retardation value R th may be -10 nm to 10 nm, preferably -5 nm to 5 nm. And more preferably about 0 nm.
- the optical film according to the present invention can be used as a polarizer protective film.
- the 3) optical film may be prepared into a film according to a method well known in the art, such as 2) the resin composition of the solution caster method or extrusion method, of which the solution caster method is preferred.
- the stretching step may be performed in the longitudinal direction (MD) stretching or in the transverse direction (TD) stretching, or both.
- MD longitudinal direction
- TD transverse direction
- stretching both a longitudinal direction and a lateral direction after extending
- Stretching can be done in one step or stretched in multiple steps.
- stretching in a longitudinal direction extending
- the starting angle of the tenter is 10 degrees or less in total, suppressing the bowing phenomenon which arises at the time of a lateral stretch, and controls the angle of an optical axis regularly.
- the same boeing suppression effect can also be obtained by making transverse stretching into multiple stages.
- the stretching may be performed at a temperature of (Tg-20 ° C) to (Tg + 30 ° C) when the glass transition temperature of the resin composition is Tg.
- 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, at which the orientation of the polymer chain is relaxed and lost. Glass transition temperatures can be measured by differential scanning calorimetry (DSC). The temperature at the time of the stretching step is more preferably the glass transition temperature of the film.
- the drawing speed is preferably in the range of 1 to 100 mm / min in the case of a universal drawing machine (Zwick Z010) and in the range of 0.1 to 2 m / min in the case of a pilot drawing machine. It is preferable to stretch the film by applying an elongation of 5 to 300%.
- the optical film according to the present invention can be uniaxially or biaxially stretched by the above-described method, thereby adjusting the phase difference characteristics.
- the plane direction retardation value represented by Equation 1 below is preferably 0 nm to 200 nm, and the thickness direction retardation value represented by Equation 2 below is preferably 10 nm to -300 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 a refractive index in the vertical direction in the n x 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.
- the surface direction retardation value and the thickness direction retardation value may be adjusted according to the content of the resin including the aromatic ring and / or the aliphatic ring in the main chain.
- the planar retardation value R in of the optical film according to the present invention may be 20 nm to 80 nm, and the thickness direction retardation value R th may be -50 nm to -300 nm.
- the optical film according to the present invention can be used as a VA mode type phase difference compensation film.
- the plane direction retardation value R in of the optical film according to the present invention may be 0 nm to 10 nm, preferably 0 nm to 5 nm, more preferably about 0 nm, and the thickness direction retardation value R th is ⁇ 10 nm. It may be from 10nm, preferably -5nm to 5nm, more preferably about 0nm.
- the optical film according to the present invention can be used as a polarizer protective film.
- the optical film according to the present invention When the optical film according to the present invention is applied to a liquid crystal display device, it may be provided on only one side of the liquid crystal panel (one sheet type) or may be provided on both sides of the liquid crystal panel (two sheets type). Although one sheet type is illustrated in FIG. 3 and two sheet types are illustrated in FIG. 4, the scope of the present invention is not limited thereto.
- the plane retardation value R in of the optical film is 30 nm to 80 nm, preferably 35 nm to 70 nm, more preferably about 40 nm to 60 nm. It is preferable that the thickness direction retardation value R in is -270 nm or less, that is, the thickness direction retardation value is preferably 270 or more in absolute value.
- the plane retardation value R in of the optical film is 30 nm to 80 nm, preferably 35 nm to 70 nm, and more preferably about 40 nm to 60 nm.
- the thickness direction retardation value R in is preferably -100 nm or less, that is, the thickness direction retardation value is preferably 100 or more in absolute value.
- the brittleness of the optical film according to the present invention can be measured by dropping a steel sphere having a particle diameter of 15.9 mm and a weight of 16.3 g on a test film to measure a height at which a hole is formed in the film, and the optical film according to the present invention has the height Preferably it is 600 mm or more, More preferably, it is 700 mm or more.
- the haze value of the optical film which concerns on this invention is 1% or less, It is more preferable that it is 0.5% or less, It is further more preferable that it is 0.1% or less.
- the physical property evaluation method in the Example of this invention is as follows.
- Weight average molecular weight (Mw) The prepared resin was dissolved in tetrahydrofuran and measured by gel osmosis chromatography (GPC).
- Tg glass transition temperature: Measured using a DSC (Differential Scanning Calorimeter) from TA Instrument.
- Haze value (transparency): The haze value was measured using HAZEMETER HM-150 of Murakami color Research Laboratory.
- An acrylic copolymer resin was prepared from 89 parts by weight of methyl methacrylate, 10 parts by weight of phenyl methacrylate, and 1 part by weight of methacrylate.
- the resin with glass transition temperature of 130 degreeC and molecular weight 110,000 was obtained.
- 99 parts by weight of this resin was prepared by compounding with 1 part by weight of polycarbonate to prepare a final resin composition. After producing this resin composition into the film by the solution casting method, extending
- An acrylic copolymer resin was prepared from 87 parts by weight of methyl methacrylate, 10 parts by weight of phenyl methacrylate, and 3 parts by weight of methacrylate.
- the resin with a glass transition temperature of 132 degreeC and molecular weight of 105,000 was obtained.
- 98.5 parts by weight of this resin was prepared by compounding with 1.5 parts by weight of polycarbonate to prepare a final resin composition.
- stretching was performed at the glass transition temperature and the phase difference value of the film was measured.
- the plane retardation value / thickness retardation value was 0.9 / -0.7.
- An acrylic copolymer resin was prepared from 90 parts by weight of methyl methacrylate, 5 parts by weight of phenyl methacrylate, and 5 parts by weight of methacrylate. As a result of measuring the glass transition temperature and molecular weight of manufactured resin, the resin of glass transition temperature 135 degreeC and molecular weight 120,000 was obtained.
- the final compounding resin was prepared by compounding 99.2 parts by weight of this resin with 0.8 parts by weight of polycarbonate. After producing this compounding resin into a film by the solution casting method, extending
- methyl methacrylate, a (meth) acrylate monomer containing an aromatic ring, and methacrylamide acrylic copolymer resin were prepared.
- the contents of the methyl methacrylate, the (meth) acrylate monomer containing an aromatic ring, and methacrylamide used in each of Examples 4 to 12 were as shown in Table 1 below, and the obtained acrylic system
- the glass transition temperature and weight average molecular weight of the copolymer resin were also shown in Table 2 below.
- the obtained acrylic copolymer resin and polycarbonate are mixed in the ratios shown in Table 3 below, the compounding resin is prepared into a film by a solution casting method, followed by stretching at a glass transition temperature, and retardation value of the film. Was measured. The results were as shown in Table 4 below.
- An acrylic copolymer resin was prepared from 90 parts by weight of methyl methacrylate and 10 parts by weight of phenyl methacrylate. As a result of measuring the glass transition temperature and molecular weight of manufactured resin, the resin with a glass transition temperature of 124 degreeC and a weight average molecular weight 100,000 was able to be obtained. This resin and polycarbonate were mixed in a weight ratio of 90:10, and compounded to prepare a final compounding resin. After the compounding resin was prepared into a film by a solution casting method, stretching was performed at the glass transition temperature, and the retardation value of the film was measured. As a result, the plane retardation value / thickness retardation value was 1.4 / -0.7.
- Acrylic copolymer resin was prepared from 80 parts by weight of methyl methacrylate and 20 parts by weight of phenyl methacrylate. As a result of measuring the glass transition temperature and molecular weight of manufactured resin, the resin with a glass transition temperature of 119 degreeC and a weight average molecular weight of 90,000 was obtained. This resin and polycarbonate were mixed in a weight ratio of 90:10, and compounded to prepare a final compounding resin. After the compounding resin was prepared into a film by a solution casting method, stretching was performed at the glass transition temperature, and the retardation value of the film was measured. As a result, the plane retardation value / thickness retardation value was 48 / -105.
- the falling ball test was performed to measure the strength of the films prepared in Examples 1, 2, 3, and Comparative Example 1.
- the experimental method was measured by dropping steel balls having a particle diameter of 15.9 mm and a weight of 16.3 g on the film to measure the height at which the holes were formed in the film. The measured height is shown in Table 5 below.
- the acrylic copolymer of the present invention was confirmed that the glass transition temperature is higher than that of the comparative example, excellent heat resistance.
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Abstract
Description
Claims (21)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN201180028518.0A CN102933624B (zh) | 2010-06-08 | 2011-06-08 | 具有高耐热性和高强度的丙烯酸类共聚物以及包含该丙烯酸类共聚物的光学膜 |
JP2013514115A JP5779822B2 (ja) | 2010-06-08 | 2011-06-08 | 光学フィルム |
US13/702,911 US8765896B2 (en) | 2010-06-08 | 2011-06-08 | Acrylic copolymer with high heat resistance and high strength, and optical film comprising the same |
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KR10-2010-0053980 | 2010-06-08 | ||
KR1020100053980A KR101304592B1 (ko) | 2010-06-08 | 2010-06-08 | 내열성·고강도 아크릴계 공중합체, 및 이를 포함하는 광학필름 |
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WO2011155771A2 true WO2011155771A2 (ko) | 2011-12-15 |
WO2011155771A3 WO2011155771A3 (ko) | 2012-05-03 |
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US (1) | US8765896B2 (ko) |
JP (1) | JP5779822B2 (ko) |
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Cited By (2)
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KR20140020763A (ko) * | 2012-08-09 | 2014-02-19 | 스미또모 가가꾸 가부시키가이샤 | 광학 재료용 수지 조성물 및 그 제조 방법 |
JP2018028098A (ja) * | 2012-08-09 | 2018-02-22 | 住友化学株式会社 | 光学材料用樹脂組成物およびその製造方法 |
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KR101304592B1 (ko) * | 2010-06-08 | 2013-09-05 | 주식회사 엘지화학 | 내열성·고강도 아크릴계 공중합체, 및 이를 포함하는 광학필름 |
TWI651356B (zh) * | 2014-01-23 | 2019-02-21 | 可樂麗股份有限公司 | 薄膜 |
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CN102933624A (zh) | 2013-02-13 |
US8765896B2 (en) | 2014-07-01 |
JP5779822B2 (ja) | 2015-09-16 |
CN102933624B (zh) | 2015-11-25 |
KR20110134152A (ko) | 2011-12-14 |
US20130144023A1 (en) | 2013-06-06 |
WO2011155771A3 (ko) | 2012-05-03 |
JP2013534942A (ja) | 2013-09-09 |
KR101304592B1 (ko) | 2013-09-05 |
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