WO2013051847A2 - 수지 조성물 및 이를 이용하여 형성된 광학 보상필름 - Google Patents
수지 조성물 및 이를 이용하여 형성된 광학 보상필름 Download PDFInfo
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- WO2013051847A2 WO2013051847A2 PCT/KR2012/008021 KR2012008021W WO2013051847A2 WO 2013051847 A2 WO2013051847 A2 WO 2013051847A2 KR 2012008021 W KR2012008021 W KR 2012008021W WO 2013051847 A2 WO2013051847 A2 WO 2013051847A2
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/18—Homopolymers or copolymers of nitriles
Definitions
- the present invention relates to a resin composition and an optical compensation film formed using the same, and more particularly, an alkyl (meth) acrylate-based unit, a styrene-based unit, a 3-6 membered heterocyclic unit substituted with at least one carbonyl group, and vinyl. It relates to a resin composition comprising a cyanide unit and an optical compensation film for IPS formed using the same.
- the liquid crystal display has a basic configuration in which polarizing plates are provided on both sides of the liquid crystal cell, and the orientation of the liquid crystal cell is changed depending on whether an electric field is applied to the driving circuit, thereby changing the characteristics of transmitted light emitted through the polarizing plate. Visualization takes place. At this time, the path and birefringence of the light change according to the incident angle of the incident light, because the liquid crystal is an anisotropic material having two different refractive indices.
- the liquid crystal display has a disadvantage in that the contrast ratio, which is a measure of how sharply the image is seen according to the viewing angle, changes, and gray scale inversion occurs, thereby reducing visibility.
- an optical compensation film for compensating for the optical phase difference generated in the liquid crystal cell is used in the liquid crystal display device, and a stretched birefringent polymer film is used as the optical compensation film.
- Examples of the material for the stretched birefringent polymer film include polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), maleimide-based copolymers and cyclic polyolefins (cyclic PO).
- PC polymethyl methacrylate
- PS polystyrene
- PC polycarbonate
- maleimide-based copolymers and cyclic PO are optically anisotropic polymer materials which have a large refractive index in the orientation direction when the molecular chains are stretched and aligned, that is, positive birefringence.
- PMMA and PS are optically anisotropic polymer materials in which the molecular chains are stretched orientated to increase the refractive index in a direction different from the orientation direction, that is, have negative birefringence.
- Polymer materials that are mainly used in optical compensation films for improving the viewing angle of liquid crystal displays include polycarbonate, maleimide-based copolymers and cyclic PO.
- TN Double Domain Twisted Nematic
- ASM axially symmetric aligned microcell
- OBC optically compensated blend
- VA Vertical alignment
- VA multidomain VA
- SE surrounding electrode
- SE patterned VA
- IPS in-plane switching
- FFS fringe-field switching
- one aspect of the present invention is to provide a resin composition for producing an optical compensation film excellent in optical properties and at the same time excellent in strength and heat resistance.
- Another aspect of the present invention is to provide an optical compensation film produced using the resin composition as described above.
- the resin composition comprises (a) an alkyl (meth) acrylate unit, (b) a styrene unit, (c) a 3-6 membered heterocyclic unit substituted with at least one carbonyl group, and (d) a vinyl cyanide unit. It is preferred to include combinations of binary or tertiary copolymers of units selected from the group.
- the alkyl moiety of the said (a) alkyl (meth) acrylate type unit is a methyl group or an ethyl group.
- the (b) styrene-based unit is preferably one or more selected from the group consisting of styrene substituted with one or more substituents selected from the group consisting of C 1-4 alkyl and halogen.
- the said (b) styrene type unit is 1 or more types chosen from the group which consists of (alpha) -methylstyrene, p-bromo styrene, p-methyl styrene, and p-chloro styrene.
- the (c) 3 to 6 membered heterocyclic unit substituted with at least one carbonyl group is preferably at least one selected from the group consisting of maleic anhydride, maleimide, glutaric anhydride, glutalimide, lactone and lactam. Do.
- the (c) vinyl cyanide unit is preferably at least one selected from the group consisting of alkyl esters of acrylic acid, methacrylic acid, acrylic acid and methacrylic acid, methacrylonitrile, acrylamide and acrylonitrile.
- the said resin composition contains phenoxy resin further.
- the phenoxy resin is preferably mixed at 0.1 to 5 parts by weight based on 100 parts by weight of the total resin composition.
- the copolymer is a binary copolymer consisting of (A) (a) alkyl (meth) acrylate units and (c) at least one carbonyl group substituted with 3 to 6 membered heterocyclic units and (B) (b) styrene It is preferable that it is a combination of the binary copolymer which consists of a system unit and (d) vinyl cyanide unit.
- the copolymer (A) is 50 to 99 parts by weight of the (a) alkyl (meth) acrylate-based unit, preferably 80 to 97 parts by weight, and more preferably 85 to 100 parts by weight of the (A) copolymer. 95 parts by weight, and (c) 1 to 50 parts by weight, preferably 3 to 20 parts by weight, based on 100 parts by weight of (A) copolymer of 3 to 6 membered heterocyclic units substituted with at least one carbonyl group Preferably it contains 5 to 15 parts by weight.
- the copolymer (B) comprises 50 to 99 parts by weight, preferably 65 to 95 parts by weight, more preferably 70 to 90 parts by weight of (b) styrene-based units, based on 100 parts by weight of the (B) copolymer and (d) 1 to 50 parts by weight, preferably 5 to 35 parts by weight, more preferably 10 to 30 parts by weight of the vinyl cyanide unit, based on 100 parts by weight of the (B) copolymer.
- the (A) copolymer and the (B) copolymer are preferably mixed in a weight ratio of 70:30 to 90:10.
- the said resin composition is a compounding resin.
- an optical film formed using the resin composition is provided.
- the value of the thickness direction retardation (R th ) represented by the following formula 1 is -50 to -250
- the value of the plane direction retardation (R in ) represented by the following formula 2 is 50 to 200
- n x is the refractive index of the largest refractive index in the plane direction of the film
- n y is the refractive index of the vertical direction of the n x direction in the plane direction of the film
- n z is the refractive index of the thickness direction
- d is the film Means the thickness
- the optical film is preferably an optical film which is a retardation film for an in-plane switching (IPS) mode liquid crystal display device.
- IPS in-plane switching
- the resin composition according to the present invention can provide an optical film having excellent optical properties and excellent optical transparency, low haze, excellent mechanical strength and heat resistance, and thus the optical film formed by using the resin composition of the present invention It can be applied to information and electronic devices such as display devices, and is particularly suitable as a compensation film used in IPS mode.
- the (a) alkyl (meth) acrylate-based unit gives a negative in-plane retardation (R in ) and a negative thickness direction retardation (R th ) to the film in the stretching process to a weak degree
- the (b) The styrene-based unit can give a strong negative in-plane retardation R in and a negative thickness direction retardation R th
- (c) 3 to 6 membered heterocyclic units substituted with at least one carbonyl group may provide excellent heat resistance to the film produced by the resin composition
- (d) vinyl cyanide units may provide excellent chemical resistance. Can be.
- the negative in-plane retardation means that the refractive index is greatest in the direction perpendicular to the stretching direction
- the positive in-plane retardation means that the refractive index is greatest in the stretching direction
- the negative thickness retardation is the refractive index in the thickness direction. It means larger than the direction average refractive index
- a positive thickness direction retardation means that in-plane average refractive index is larger than thickness direction refractive index.
- the retardation characteristics of the optical film produced therefrom may vary depending on the composition, the stretching direction, the stretching ratio and the stretching method of the respective components. Therefore, in the present invention, by adjusting the composition and the stretching method of the respective components, it is possible to produce a compensation film, particularly applicable to the LCD IPS mode.
- the resin composition of the present invention comprises (a) an alkyl (meth) acrylate unit, (b) a styrene unit, (c) a 3 to 6 membered heterocyclic unit substituted with at least one carbonyl group, and (d) vinyl cyanide Combinations of binary or tertiary copolymers of units selected from the group consisting of units, more particularly the copolymers comprise (A) (a) alkyl (meth) acrylate based units and (c) at least one It is preferable that it is a combination of the binary copolymer which consists of a 3-6 membered heterocyclic unit substituted by the carbonyl group of (B), and the binary copolymer which consists of (B) (b) styrene type unit and (d) vinyl cyanide unit.
- a copolymer means that an element referred to herein as a 'unit' is polymerized into a monomer to be included as a repeating unit in the copolymer resin, wherein the copolymer is a block copolymer or random air. It may be a copolymer, but the copolymerized form is not limited thereto.
- the copolymer (A) is 50 to 99 parts by weight of the (a) alkyl (meth) acrylate-based unit, preferably 80 to 97 parts by weight, and more preferably 85 to 100 parts by weight of the (A) copolymer. 95 parts by weight, (c) 1 to 50 parts by weight, preferably 3 to 20 parts by weight, based on 100 parts by weight of (A) the copolymer of 3 to 6 membered heterocyclic units substituted with at least one carbonyl group Preferably 5 to 15 parts by weight.
- the copolymer (B) comprises 50 to 99 parts by weight, preferably 65 to 95 parts by weight, more preferably 70 to 90 parts by weight of (b) styrene-based units, based on 100 parts by weight of the (B) copolymer and (d) 1 to 50 parts by weight, preferably 5 to 35 parts by weight, more preferably 10 to 30 parts by weight of the vinyl cyanide unit, based on 100 parts by weight of the (B) copolymer.
- the styrene-based unit is contained less than 50 parts by weight, there is a problem that the processing of the resin composition is not easy, when contained in excess of 95 parts by weight there is a problem that the color of the resin composition is severely discolored, (d) When the vinyl cyanide unit is included in less than 1 part by weight may have a compatibility problem that does not mix well with the (A) copolymer, and when included in excess of 50 parts by weight may cause carbides during processing of the resin composition there is a problem.
- the resin composition of the present invention consists of a combination of the (A) copolymer and (B) copolymer
- the (A) copolymer and (B) copolymer are respectively mixed in a weight ratio of 70:30 to 90:10. It is desirable to be. If (A) the copolymer is contained in a smaller amount than this, there is a problem that the expression of the phase difference of the film is limited, if it is included in an amount exceeding this, there may be a problem in the compatibility of the (A) copolymer and (B) copolymer have.
- the resin composition of the present invention preferably further comprises a phenoxy clock resin, wherein the phenoxy resin is 5 to 10,000, preferably 5 to 7,000, more preferably at least one unit represented by the following formula (1) It is preferable to include 5 to 5,000, and they may be included in the form of random, alternating or block.
- the phenoxy resin preferably has a number average molecular weight of 1,500 to 2,000,000 g / mol.
- the number average molecular weight is less than 1,500 g / mol, there is a problem of inhibiting film physical properties, and if the number average molecular weight exceeds 2,000,000 g / mol, there is a problem of compatibility with the copolymer of the present invention.
- the phenoxy clock resin is preferably mixed in an amount of 1 to 5 parts by weight based on 100 parts by weight of the total resin composition, and the phenoxy clock resin serves to control the phase difference of the film generated during stretching, so that the phenoxy resin is less than 1 part by weight. If included, there is a problem that the effect of phase expression is not large, and if it exceeds 5 parts by weight there is a problem that mixing is not easy. In the case of containing a phenoxy resin, it is possible to manufacture a film having improved strength.
- the meaning of (a) 'alkyl (meth) acrylate-based unit' means including both 'alkyl acrylate-based unit' and 'alkyl methacrylate-based unit'.
- the alkyl moiety of the alkyl (meth) acrylate-based unit preferably has 1 to 10 carbon atoms, more preferably 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group.
- the alkyl methacrylate-based unit is more preferably methyl methacrylate, but is not limited thereto.
- the (b) styrene-based unit may use an unsubstituted styrene unit, but includes styrene substituted with one or more substituents selected from the group containing aliphatic hydrocarbons and hetero atoms in the benzene ring or vinyl group of the styrene, More specifically, units substituted with one or more substituents selected from the group containing C 1-4 alkyl and halogen can be used, more preferably ⁇ -methylstyrene, p-bromo styrene, p-methyl styrene and One or more types selected from the group consisting of p-chloro styrene can be used.
- the (c) 3 to 6 membered heterocyclic unit substituted with at least one carbonyl group may be selected from the group consisting of maleic anhydride, maleimide, glutaric anhydride, glutalimide, lactone and lactam.
- the (d) vinyl cyanide unit may be selected from the group consisting of alkyl esters of acrylic acid, methacrylic acid, acrylic acid and methacrylic acid, methacrylonitrile, acrylamide and acrylonitrile.
- the resin composition according to the present invention may be prepared by blending the above components according to methods well known in the art such as compounding compound, and the melt mixing of the above components may be performed using an extruder or the like.
- the resin composition may include additives well known in the art such as lubricants, antioxidants, UV stabilizers, heat stabilizers, etc. which are generally used.
- the optical film according to the present invention can be formed using the above resin composition. Specifically, after obtaining the resin composition, the optical film according to the present invention may be prepared, including forming a film, and may further include uniaxially or biaxially stretching the film.
- any method known in the art may be used, and specifically, an extrusion molding method may be used.
- the resin composition is dried in vacuo to remove moisture and dissolved oxygen, and then fed from a raw material hopper to a single or twin extruder substituted with nitrogen, and melted at a high temperature to obtain raw material pellets, and thus obtained raw material pellets.
- the method may further include uniaxially or biaxially stretching the film.
- the optical film formed using the resin composition of the present invention preferably has a thickness of 5 to 300 ⁇ m, but is not limited thereto.
- the optical transmittance of the optical film is 90% or more, and the haze characteristic is 2.5%. Or less, preferably 1% or less, and more preferably 0.5% or less. When 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 glass transition temperature of the optical film which concerns on this invention it is more preferable that it is 120 degreeC or more.
- the glass transition temperature of the resin composition may be 200 ° C. or less, but is not limited thereto. If the glass transition temperature is less than 110 ° C, there is a problem that the deformation of the film is likely to occur under high temperature and high humidity conditions due to lack of heat resistance, thereby resulting in non-uniform compensation characteristics of the film.
- the weight average molecular weight of the resin composition is preferably 50,000 to 500,000 in terms of heat resistance, processability, productivity and the like.
- the optical film according to the present invention is preferably a retardation film for IPS, and may have different retardation values depending on the content of (a) alkyl (meth) acrylate units or (b) styrene units.
- the ratio of the absolute value of the phase difference value in the thickness direction to the phase difference value in the surface direction is preferably 0.4 to 1.5, and the optical film according to the present invention is 550.
- the value of the thickness direction retardation (R th ) represented by Equation 1 is -50 to -250
- the value of the plane direction retardation (R in ) represented by Equation 2 is 50 to 200
- n x is the refractive index of the largest refractive index in the plane direction of the film
- n y is the refractive index of the vertical direction of the n x direction in the plane direction of the film
- n z is the refractive index of the thickness direction
- d is the film Means the thickness
- the raw material hopper is a resin composition obtained by uniformly mixing poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A) and styrene-acrylonitrile copolymer resin (B) in a weight ratio of 90:10. From the extruder to a nitrogen-substituted 24 ⁇ extruder was melted at 250 °C to prepare a raw material pellet (pellet). The prepared resin was measured for glass transition temperature (Tg) using DSC, the results are shown in Table 1 below.
- N-cyclohexylmaleimide-co-methylmethacrylate resin had a content of N-cyclohexylmaleimide of 6.5 wt% according to NMR analysis.
- the raw material hopper is a resin composition obtained by uniformly mixing poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A) and styrene-acrylonitrile copolymer resin (B) in a weight ratio of 80:20. From the extruder to a nitrogen-substituted 24 ⁇ extruder was melted at 250 °C to prepare a raw material pellet (pellet). The prepared resin was measured for glass transition temperature (Tg) using DSC, the results are shown in Table 1 below. The same thing as Example 1 was used for the styrene-acrylonitrile copolymer resin and the poly (N-cyclohexylmaleimide-co-methylmethacrylate) resin.
- Tg glass transition temperature
- the raw material hopper is a resin composition obtained by uniformly mixing poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A) and styrene-acrylonitrile copolymer resin (B) at a weight ratio of 70:30. From the extruder to a nitrogen-substituted 24 ⁇ extruder was melted at 250 °C to prepare a raw material pellet (pellet). The prepared resin was measured for glass transition temperature (Tg) using DSC, the results are shown in Table 1 below. The same thing as Example 1 was used for the styrene-acrylonitrile copolymer resin and the poly (N-cyclohexylmaleimide-co-methylmethacrylate) resin.
- Tg glass transition temperature
- Poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A), styrene-acrylonitrile copolymer resin (B) and phenoxy resin (C) are uniformly mixed in a weight ratio of 75: 20: 5
- One resin composition was fed from a raw material hopper to an extruder in a nitrogen-substituted 24 ⁇ extruder and melted at 250 ° C to prepare raw material pellets.
- the prepared resin was measured for glass transition temperature (Tg) using DSC, the results are shown in Table 1 below.
- Tg glass transition temperature
- a resin composition obtained by uniformly mixing poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A) and phenoxy resin (C) in a weight ratio of 80:20 was supplied from a raw material hopper to an extruder.
- the raw material pellets were supplied to a substituted extruder of 24 ⁇ and melted at 250 ° C. to prepare a raw pellet.
- the prepared resins were measured for glass transition temperature (Tg) using DSC, and the results are shown in Table 1 below. .
- the raw material hopper is a resin composition obtained by uniformly mixing poly (N-cyclohexylmaleimide-co-methylmethacrylate) (A) and styrene-maleic anhydride copolymer resin (D) at a weight ratio of 80:20. From the extruder to a nitrogen-substituted 24 ⁇ extruder was melted at 250 °C to prepare a raw pellet (pellet), the resin was measured using a DSC glass transition temperature (Tg), the results Table 1 shows.
- A N-cyclohexylmaleimide-co-methylmethacrylate
- D styrene-maleic anhydride copolymer resin
- Example 1 A B 90:10 122
- the biaxially stretched film was produced in the ratio shown in Table 2 in the MD and TD direction by using this film using the experimental film drawing equipment at the temperature conditions about 2-10 degreeC higher than the glass transition temperature of resin.
- the plane direction retardation value and the thickness direction retardation value of the film are shown in Table 2 below.
- the optical film produced by the resin composition of the present invention is a phase difference film for a liquid crystal display device of the IPS mode in which the thickness direction retardation value is required to be a negative value ((-) R th ). It can be seen that the development is large enough to be used in the manufacture, and that the value can be controlled by adjusting the draw ratio or draw temperature.
- the raw material pellets obtained in ⁇ Example 2>, ⁇ Example 4> and ⁇ Comparative Example 2> were respectively vacuum dried and melted with an extruder at 250 ° C, and then passed through a coat hanger type T-die.
- a film having a thickness of 150 ⁇ m was produced through a chrome plating casting roll, a drying roll, and the like.
- the biaxially oriented film was prepared using the resin composition in a ratio shown in Table 3 in the MD and TD directions at a temperature condition of about 2 to 10 ° C. higher than the glass transition temperature of the resin using an experimental film stretching equipment.
- the surface direction retardation value and the thickness direction retardation value of the film are shown in Table 3 below.
- Comparative Example 2 The optical film produced by the resin composition did not satisfy the negative value in the thickness direction retardation value, and thus, it was confirmed that the optical film was not suitable for use as a retardation film for IPS mode viewing angle compensation.
- the phenoxy resin is introduced as in ⁇ Example 4> it can be seen that the falling impact height indicating the strength of the film can implement the effect compared to Example 2.
- Films prepared using the raw material pellets obtained in ⁇ Comparative Example 3> and ⁇ Example 2> were biaxially oriented in the MD and TD directions at a temperature of about 2 to 10 ° C. higher than the glass transition temperature of the resin using an experimental film drawing equipment.
- the film was prepared by stretching, and Table 4 shows the stretching conditions and the surface direction and thickness direction retardation values of the stretched film, respectively.
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Abstract
Description
시료 | 수지 조성 | 중량비 | 유리전이온도(Tg,℃) |
실시예 1 | A:B | 90:10 | 122 |
실시예 2 | A:B | 80:20 | 119 |
실시예 3 | A:B | 70:30 | 116 |
실시예 4 | A:B:C | 75:20:5 | 118 |
비교예 1 | A | 100 | 124 |
비교예 2 | A:C | 80:20 | 114 |
비교예 3 | A:D | 80:20 | 130 |
시료 | 연신온도(℃) | 연신율(%) | 위상차(nm) | 두께(㎛) | ||
MD | TD | Rin | Rth | |||
실시예 2 | 127 | 10 | 122 | 116.4 | -104.2 | 60 |
실시예 2 | 127 | 10 | 142 | 130.2 | -110.1 | 60 |
실시예 2 | 127 | 10 | 163 | 144.8 | -118.8 | 60 |
실시예 2 | 127 | 10 | 168 | 146.5 | -119.4 | 60 |
실시예 2 | 127 | 24 | 112 | 96.7 | -111.9 | 60 |
실시예 2 | 127 | 24 | 122 | 106.5 | -114.1 | 60 |
실시예 2 | 127 | 24 | 153 | 127.0 | -119.0 | 60 |
실시예 2 | 127 | 24 | 163 | 133.3 | -121.7 | 60 |
실시예 2 | 127 | 32 | 112 | 99.7 | -120.5 | 60 |
실시예 2 | 127 | 32 | 122 | 114.0 | -127.4 | 60 |
실시예 2 | 127 | 32 | 153 | 130.4 | -133.0 | 60 |
실시예 2 | 127 | 32 | 163 | 136.9 | -135.1 | 60 |
실시예 2 | 127 | 32 | 168 | 144.1 | -139.5 | 60 |
실시예 2 | 127 | 41 | 112 | 88.5 | -114.8 | 60 |
실시예 2 | 127 | 41 | 132 | 103.3 | -120.0 | 61 |
실시예 2 | 127 | 41 | 142 | 114.3 | -129.5 | 62 |
실시예 2 | 127 | 41 | 163 | 129.8 | -137.2 | 63 |
실시예 2 | 127 | 41 | 168 | 132.9 | -137.1 | 64 |
비교예 1 | 132 | 41 | 112 | 24.3 | -31.6 | 60 |
비교예 1 | 132 | 41 | 132 | 26.4 | -33.7 | 61 |
비교예 1 | 132 | 41 | 142 | 29.8 | -35.2 | 60 |
비교예 1 | 132 | 41 | 168 | 29.3 | -36.3 | 60 |
시료 | 연신율(%) | 위상차(nm) | 두께(㎛) | 낙구 충격높이(mm) | ||
MD | TD | Rin | Rth | |||
실시예 2 | 41 | 112 | 88.5 | -114.8 | 60 | 547 |
실시예 4 | 50 | 100 | 74.7 | -103.4 | 60 | 623 |
비교예 2 | 50 | 75 | 27 | 110 | 60 | 704 |
비교예 2 | 50 | 100 | 58 | 126 | 60 | 736 |
비교예 2 | 75 | 100 | 25 | 133 | 60 | 789 |
시료 | 연신 온도(℃) | 연신율(%) | 위상차(nm) | 두께(㎛) | ||
MD | TD | Rin | Rth | |||
비교예 3 | 134 | 20 | 121 | 107 | -118.1 | 60 |
비교예 3 | 134 | 20 | 162 | 141 | -132.6 | 60 |
비교예 3 | 134 | 20 | 182 | 163 | -134.8 | 60 |
비교예 3 | 134 | 26 | 101 | 88 | -116.2 | 60 |
비교예 3 | 134 | 26 | 121 | 96 | -116.6 | 60 |
비교예 3 | 134 | 26 | 131 | 112 | -127.1 | 60 |
비교예 3 | 134 | 26 | 141 | 115 | -124.2 | 60 |
비교예 3 | 134 | 26 | 172 | 136 | -136.3 | 60 |
비교예 3 | 134 | 26 | 177 | 136 | -132.2 | 60 |
비교예 3 | 134 | 31 | 101 | 68 | -104.3 | 60 |
비교예 3 | 134 | 31 | 101 | 68 | -104.3 | 60 |
비교예 3 | 134 | 31 | 121 | 90 | -121.0 | 60 |
비교예 3 | 134 | 31 | 141 | 108 | -128.1 | 60 |
비교예 3 | 134 | 31 | 167 | 125 | -134.2 | 60 |
비교예 3 | 134 | 31 | 172 | 129 | -134.4 | 60 |
비교예 3 | 134 | 31 | 172 | 129 | -136.1 | 60 |
비교예 3 | 134 | 31 | 177 | 135 | -136.3 | 60 |
비교예 3 | 134 | 31 | 182 | 137 | -133.7 | 60 |
비교예 3 | 134 | 41 | 101 | 67 | -118.7 | 60 |
비교예 3 | 134 | 41 | 121 | 77 | -122.4 | 60 |
비교예 3 | 134 | 41 | 152 | 104 | -134.3 | 60 |
비교예 3 | 134 | 41 | 162 | 117 | -142.2 | 60 |
비교예 3 | 134 | 41 | 177 | 128 | -143.3 | 60 |
비교예 3 | 134 | 41 | 182 | 128 | -140.1 | 60 |
실시예 2 | 127 | 41 | 112 | 88.5 | -114.8 | 60 |
실시예 2 | 127 | 41 | 132 | 103.3 | -120.0 | 61 |
실시예 2 | 127 | 41 | 142 | 114.3 | -129.5 | 62 |
실시예 2 | 127 | 41 | 163 | 129.8 | -137.2 | 63 |
Claims (23)
- (a)알킬(메트)아크릴레이트계 단위, (b)스티렌계 단위, (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위 및 (d)비닐 시아나이드 단위를 포함하는 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 (a)알킬(메트)아크릴레이트계 단위, (b)스티렌계 단위, (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위 및 (d)비닐 시아나이드 단위로 이루어진 그룹으로부터 선택된 단위의 2원 또는 3원 공중합체의 조합을 포함하는 수지 조성물.
- 제1항에 있어서,상기 (a)알킬(메트)아크릴레이트계 단위의 알킬 부(moiety)는 메틸기 또는 에틸기인 수지 조성물.
- 제1항에 있어서,상기 (b)스티렌계 단위는 스티렌의 벤젠고리 또는 비닐기가 C1-4알킬 및 할로겐을 포함하는 기로부터 선택되는 하나 이상의 치환기로 치환된 스티렌으로 이루어진 군으로부터 선택되는 1종 이상인 수지 조성물.
- 제1항에 있어서,상기 (b)스티렌계 단위는 α-메틸스티렌, p-브로모 스티렌, p-메틸 스티렌 및 p-클로로 스티렌으로 이루어진 군으로부터 선택되는 1종 이상인 수지 조성물.
- 제1항에 있어서,상기 (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리계 단위는 말레산 무수물, 말레이미드, 글루탈산 무수물, 글루탈이미드, 락톤 및 락탐으로 이루어진 군으로부터 선택되는 수지 조성물.
- 제1항에 있어서,상기 (d)비닐 시아나이드 단위는 아크릴산, 메타크릴산, 아크릴산 및 메타크릴산의 알킬에스테르, 메타크릴로니트릴, 아크릴아미드 및 아크릴로니트릴로 이루어진 그룹으로부터 선택되는 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 페녹시계 수지를 추가로 포함하는 수지 조성물.
- 제8항에 있어서,상기 페녹시계 수지는 전체 수지 조성물 100 중량부에 대해 1 내지 5 중량부로 혼합된 수지 조성물.
- 제2항에 있어서,상기 공중합체는 (A)(a)알킬(메트)아크릴레이트계 단위와 (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위로 이루어진 2원 공중합체 및 (B)(b)스티렌계 단위와 (d)비닐 시아나이드 단위로 이루어진 2원 공중합체의 조합인 수지 조성물.
- 제10항에 있어서,상기 (A)공중합체는 (A)공중합체 100 중량부에 대해 (a)알킬(메트)아크릴레이트계 단위 50 내지 99 중량부 및 (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위 1 내지 50 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (A)공중합체는 (A)공중합체 100 중량부에 대해 (a)알킬(메트)아크릴레이트계 단위 80 내지 97 중량부 및 (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위 3 내지 20 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (A)공중합체는 (A)공중합체 100 중량부에 대해 (a)알킬(메트)아크릴레이트계 단위 85 내지 95 중량부 및 (c)적어도 하나의 카르보닐기로 치환된 3 내지 6원소 헤테로고리 단위 5 내지 15 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (B)공중합체는 (B)공중합체 100 중량부에 대해 (b)스티렌계 단위 50 내지 99 중량부 및 (d)비닐 시아나이드 단위 1 내지 50 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (B)공중합체는 (B)공중합체 100 중량부에 대해 (b)스티렌계 단위 65 내지 95 중량부 및 (d)비닐 시아나이드 단위 5 내지 35 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (B)공중합체는 (B)공중합체 100 중량부에 대해 (b)스티렌계 단위 70 내지 90 중량부 및 (d)비닐 시아나이드 단위 10 내지 30 중량부를 포함하는 수지 조성물.
- 제10항에 있어서,상기 (A)공중합체와 (B)공중합체가 70:30 내지 90:10의 중량비로 혼합되는 수지 조성물.
- 제1항에 있어서,상기 수지 조성물은 컴파운딩 수지인 수지 조성물.
- 제1항 내지 제18항 중 어느 한 항의 수지 조성물을 이용하여 형성된 광학필름.
- 제19항에 있어서,상기 광학필름은 550 nm 파장의 빛에서 하기 식 1로 표현되는 두께 방향 위상차(Rth)의 값이 -50 내지 -250인 광학필름:[식 1] Rth=[(nx+ny)/2 - nz]×d여기서, nx는 필름의 면 방향에 있어서 가장 굴절율이 큰 방향의 굴절율이고,ny는 필름의 면 방향에 있어서 nx 방향의 수직 방향의 굴절율이며,nz는 두께 방향의 굴절율이고,d는 필름의 두께를 의미한다.
- 제19항에 있어서,상기 광학필름은 550 nm 파장의 빛에서 하기 식 2로 표현되는 면 방향 위상차(Rin)의 값이 50 내지 200인 광학필름:[식 2] Rin=(nx-ny)×d여기서, nx는 필름의 면 방향에 있어서 가장 굴절율이 큰 방향의 굴절율이고,ny는 필름의 면 방향에 있어서 nx 방향의 수직 방향의 굴절율이며,nz는 두께 방향의 굴절율이고,d는 필름의 두께를 의미한다.
- 제19항에 있어서,상기 광학필름은 550 nm 파장의 빛에서 하기 식 2로 표현되는 면 방향 위상차와 하기 식 1로 표현되는 두께 방향 위상차의 비(Rin/Rth)의 절대 값이 0.4 내지 1.5 인 광학필름:[식 1] Rth=[(nx+ny)/2 - nz]×d[식 2] Rin=(nx-ny)×d여기서, nx는 필름의 면 방향에 있어서 가장 굴절율이 큰 방향의 굴절율이고,ny는 필름의 면 방향에 있어서 nx 방향의 수직 방향의 굴절율이며,nz는 두께 방향의 굴절율이고,d는 필름의 두께를 의미한다.
- 제19항에 있어서,상기 광학필름은 평면내-스위칭(IPS) 모드 액정표시장치용 위상차 필름인 광학필름.
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