WO2017196001A1 - 액정 배향제 조성물, 액정 배향막의 제조 방법, 이를 이용한 액정 배향막 및 액정 표시소자 - Google Patents
액정 배향제 조성물, 액정 배향막의 제조 방법, 이를 이용한 액정 배향막 및 액정 표시소자 Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
- G02F1/133723—Polyimide, polyamide-imide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/56—Aligning agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/02—Alignment layer characterised by chemical composition
- C09K2323/025—Polyamide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/02—Alignment layer characterised by chemical composition
- C09K2323/027—Polyimide
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
Definitions
- Liquid crystal aligning agent composition The manufacturing method of a liquid crystal aligning film, The liquid crystal aligning film and liquid crystal display element using the same
- the present invention relates to a liquid crystal aligning agent composition, a method of manufacturing a liquid crystal aligning film, a liquid crystal aligning film and a liquid crystal display device using the same, which not only have excellent orientation and stability, but also have enhanced electrical properties such as voltage holding retention.
- the liquid crystal alignment film plays a role of orienting the liquid crystal in a constant direction.
- the liquid crystal alignment layer serves as a director in the arrangement of the liquid crystal molecules, so that the liquid crystal is moved by an electric field to form an image when the liquid crystal is moved to form an image.
- it is essential to orient the liquid crystal uniformly.
- a rubbing method is used in which a polymer film such as polyimide is applied to a substrate such as glass, and the surface is rubbed in a predetermined direction using fibers such as nylon or polyester.
- the rubbing method may generate fine dust or electrostatic charge (ESD) when the fiber and the polymer film are rubbed, which may cause serious problems in manufacturing the liquid crystal panel.
- polyimide is formed through a high temperature heat treatment process and subjected to light irradiation to perform alignment treatment.
- a large amount of energy is required, so that it is difficult to secure actual productivity, and there is a limit that an additional heat treatment process is also required to secure alignment stability after light irradiation. .
- the present invention is to provide a liquid crystal aligning agent composition that not only has excellent orientation and stability, but also has enhanced electrical characteristics such as voltage holding integrity.
- this invention is providing the manufacturing method of the liquid crystal aligning film using the said liquid crystal aligning agent composition.
- the present invention also provides a liquid crystal display device comprising the liquid crystal alignment film and the liquid crystal alignment film produced according to the method for producing the liquid crystal alignment film.
- a first polymer comprising a repeating unit represented by the following formula (1) and at least one repeating unit selected from the group consisting of repeating units represented by 3, and a second comprising a repeating unit represented by the following formula (4)
- the liquid crystal aligning agent composition containing the polymer for liquid crystal aligning agents is provided.
- the present invention comprises the steps of applying the liquid crystal aligning agent composition to a substrate to form a coating film;
- Drying the coating film Irradiating the coating film immediately after the drying step with an alignment treatment; It provides a method for producing a liquid crystal alignment film comprising; step of curing the alignment-treated coating film by heat treatment.
- this invention provides the liquid crystal aligning film manufactured according to the manufacturing method of the said liquid crystal aligning film.
- this invention provides the liquid crystal display element containing the said liquid crystal aligning film.
- a liquid crystal aligning agent composition comprising at least one repeating unit selected from the group consisting of a repeating unit represented by the following Chemical Formula 2 and a repeating unit represented by the following Chemical Formula 3 and a repeating unit represented by the following Chemical Formula 1
- a liquid crystal aligning agent composition comprising a polymer for aligning agent and a polymer for second liquid crystal aligning agent comprising a repeating unit represented by the following formula (4):
- R 1 and R 2 are each independently hydrogen or carbon number
- R 3 and R 4 are each independently hydrogen or carbon number
- X 1 is a tetravalent organic group represented by the following Chemical Formula 5,
- R 5 to R 8 are each independently hydrogen or an alkyl group having 1 to 6 carbon atoms
- X 2 to X 4 are each independently a tetravalent organic group derived from a hydrocarbon having 4 to 20 carbon atoms, at least one H of the tetravalent organic groups is substituted with halogen, or at least one -CH 2 -valent oxygen or sulfur A tetravalent organic group replaced by _0-, -CO-, -S-, -SO—, -SO2- or -C0NH- so that the atoms are not directly connected,
- Y 1 to Y 4 are each independently a divalent organic group.
- a coating film is formed, and then converted into a polyimide through a high temperature heat treatment process. Irradiation was performed and orientation treatment was performed.
- an additional heat treatment process is performed to secure alignment stability after light irradiation.
- Many of these light irradiation energy and additional high temperature heat treatment process is very disadvantageous in terms of process cost and processing time, so there was a limit to apply to the actual mass production process.
- the present inventors through an experiment, essentially include a repeating unit represented by Chemical Formula 1, and further include at least one repeating unit selected from the group consisting of a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3. Since the first polymer includes a predetermined amount of imide repeating units imidized already, when a mixture of a polymer for a first liquid crystal aligning agent and a polymer for a second liquid crystal aligning agent including the repeating unit represented by Formula 4 is used. After the coating film is formed, the anisotropy can be generated by directly irradiating light without a high temperature heat treatment step, and then the heat treatment can be completed to align the alignment film. Therefore, the light irradiation energy can be greatly reduced, and a single heat treatment step is included. In addition to the excellent orientation and stability in a simple process, Properties was also confirmed that it is possible to manufacture an excellent liquid crystal alignment film, and completed the invention.
- Hydrocarbons having 4 to 20 carbon atoms include alkanes having 4 to 20 carbon atoms, alkenes having 4 to 20 carbon atoms, alkynes having 4 to 20 carbon atoms, cycloalkanes having 4 to 20 carbon atoms, and carbon atoms.
- a cycloalkene of 4 to 20, an arene of 6 to 20 carbon atoms, or one or more of these cyclic hydrocarbons is a fused r ing sharing two or more atoms, or one of them More than one hydrocarbon chemically It may be a combined hydrocarbon.
- hydrocarbons having 4 to 20 carbon atoms include n-butane, cyclobutane, 1-methylcyclobutane, 1,3-dimethylcyclobutane, 1,2,3,4-tetramethylcyclobutane cyclopentane, cyclonucleic acid, Cycloheptane, cyclooctane, cyclonuxene, 1-methyl-3-ethylcyclonuxene, bicyclonuclear chamber, benzene, biphenyl, diphenylmethane, 2, 2-diphenylpropane, 1-ethyl-1, 2, 3, 4-tetrahydronaphthalene, 1, 6- diphenylnucleic acid, etc. can be illustrated.
- the alkyl group having 1 to 10 carbon atoms may be a straight chain, branched chain or cyclic alkyl group. Specifically, the alkyl group having 1 to 10 carbon atoms is a straight chain alkyl group having 1 to 10 carbon atoms; Linear alkyl groups having 1 to 5 carbon atoms; Branched or cyclic alkyl groups having 3 to 10 carbon atoms; Or a branched or cyclic alkyl group having 3 to 6 carbon atoms.
- the alkyl group having 1 to 10 carbon atoms is methyl group, ethyl group, n-propyl group, i so-propyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, i so- A pentyl group, neo-pentyl group, a cyclonuclear group, etc. can be illustrated.
- the alkoxy group having 1 to 10 carbon atoms may be a straight chain, branched chain or cyclic alkoxy group. Specifically, the alkoxy group having 1 to 10 carbon atoms is a straight alkoxy group having 1 to 10 carbon atoms; Linear alkoxy groups having 1 to 5 carbon atoms; Branched or cyclic alkoxy groups having 3 to 10 carbon atoms; Or a branched or cyclic alkoxy group having 3 to 6 carbon atoms.
- examples of the alkoxy group having 1 to 10 carbon atoms include methoxy group, ethoxy group, n-propoxy group, i so -propoxy group, n-butoxy group, i so -butoxy group, tert-butoxy group and n-phene group.
- the time period, isofene special time group, a neo-phenoxy group, a cyclonucleooxy group, etc. can be illustrated.
- the fluoroalkyl group having 1 to 10 carbon atoms may have one or more hydrogens of the alkyl group having 1 to 10 carbon atoms substituted with fluorine, and the fluoroalkoxy group having 1 to 10 carbon atoms may have at least one hydrogen of the alkoxy group having 1 to 10 carbon atoms. May be substituted with fluorine.
- Alkenyl groups having 2 to 10 carbon atoms may be linear, branched or cyclic alkenyl groups. Specifically, an alkenyl group having 2 to 10 carbon atoms has a straight chain alkenyl group having 2 to 10 carbon atoms, a straight chain alkenyl group having 2 to 5 carbon atoms, a branched alkenyl group having 3 to 10 carbon atoms, a branched alkenyl group having 3 to 6 carbon atoms, and 5 carbon atoms It may be a cyclic alkenyl group of 10 to 10 or a cyclic alkenyl group of 6 to 8 carbon atoms. More specifically, examples of the alkenyl group having 2 to 10 carbon atoms include an ethenyl group, propenyl group, butenyl group, pentenyl group or cyclonuxenyl group.
- Halogen may be fluorine (F), chlorine (C1), bromine (Br) or iodine (I).
- a multivalent organic group derived from any compound refers to a moiety in a form in which a plurality of hydrogen atoms attached to any compound have been removed.
- a tetravalent organic group derived from cyclobutane means a moiety in a form in which any four hydrogen atoms bonded to cyclobutane are removed.
- ⁇ * in the formula means a residue of a form in which hydrogen of the site is removed.
- * ⁇ ⁇ ⁇ means any one of residues in the form of four hydrogen atoms bonded to carbons 1, 2, 3 and 4 of cyclobutane, that is, a tetravalent organic group derived from cyclobutane. .
- Y 1 to Y 4 may each independently be a divalent organic group represented by Formula 6 below:
- R 9 and R 10 each independently represent a halogen, a cyano group, an alkyl group having 1 to 3 carbon atoms, an alkenyl group having 2 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a fluoroalkyl group having 1 to 3 carbon atoms, or a carbon group having 1 to 3 carbon atoms
- Fluoroalkoxy group, p and q are each independently an integer between 0 and 4,
- Z is an integer between 1 and 10
- k and m are each independently an integer between 1 and 3
- n is an integer between 0 and 3.
- Hydrogen is bonded to carbon which is not substituted with R 9 or R 10 in Formula 6, and when p or q is an integer between 2 and 4, a plurality of R 9 or R10 may be the same or different substituents.
- N in 6 may be an integer from 0 to 3 or an integer of 0 or 1.
- X 1 is a tetravalent organic group represented by Formula 5
- X 2 to X 4 are each independently a tetravalent and organic group derived from a hydrocarbon having 4 to 20 carbon atoms, Black is -0-, -co-, -S-, -so-, so that at least one H of the tetravalent ' organic group is substituted with halogen or at least one -CH 2 -is not directly connected to oxygen or sulfur atoms; It may be a tetravalent organic group replaced with S0 2 -or -C0NH-.
- X 2 to X 4 may be each independently a tetravalent organic group described in Chemical Formula 7.
- R 5 to R 8 are each independently hydrogen or an alkyl group having 1 to 6 carbon atoms
- L 2 is a single bond, -0—, -CO-, -S-, -SO-, -S0 2- , -CR n R 12- , -C0NH-,-COO—,-(CH 2 ) Z- , -0 (CH 2 ) z 0-, -C00- (CH 2 ) z -0C0-, phenylene or any combination thereof
- R 11 and R 12 are each independently hydrogen, of 1 to 10 carbon atoms
- An alkyl group or a fluoroalkyl group, z is an integer from 1 to 10.
- the polymer for a first liquid crystal aligning agent used in the method for producing a liquid crystal alignment film of the embodiment may include a repeating unit represented by the formula (1), which is an imide repeating unit, among the repeating units represented by the formulas (1), (2) and (3). 10 mol% to 74 mol%, preferably 20 mol% to 60 mol%, based on the total repeating units.
- the polymer for the first liquid crystal aligning agent including a specific content of the imide repeating unit represented by Formula 1 since the polymer contains a predetermined amount of imide repeating units imidized already, high temperature heat treatment Even if the process is omitted and the light is directly irradiated, a liquid crystal alignment layer having excellent orientation and stability and excellent voltage retention and electrical characteristics can be produced. If the repeating unit represented by the formula (1) is included less than the content range does not exhibit a sufficient orientation characteristics, the orientation stability may be lowered, if the content of the repeating unit represented by the formula (1) exceeds the above range solubility Problems may appear that are difficult to produce a stable alignment liquid coatable. Accordingly, it is preferable to include the repeating unit represented by Chemical Formula 1 in the above-described content range because it is possible to provide a polymer for a liquid crystal aligning agent having excellent storage stability, electrical characteristics, orientation characteristics, and orientation stability.
- the polymer for the first liquid crystal aligning agent may include a repeating unit represented by the formula (2) or a repeating unit represented by the formula (3) in an appropriate amount according to the desired properties.
- the repeating unit represented by Formula 2 may include 0 mol% to 40 mol%, preferably 0 mol% to 30% based on the total repeating units represented by Formulas 1 to 3. Since the repeating unit represented by the formula (2) has a low rate of conversion to imide during the high silver heat treatment process after light irradiation, when exceeding the above range, the overall imidation ratio may be insufficient and the orientation stability may be lowered. Therefore, the repeating unit represented by the formula (2) has a suitable solubility within the above-described range for the liquid crystal aligning agent capable of realizing a high imidation rate with excellent process characteristics Polymers may be provided.
- the repeating unit represented by Chemical Formula 3 may include 0 mol3 ⁇ 4> to 95 mol%, preferably 10 mol% to 90 mol% based on the total repeating units represented by Chemical Formulas 1 to 3. It is possible to provide a polymer for a liquid crystal aligning agent that exhibits excellent coating properties within such a range and excellent in process characteristics and can realize a high imidation ratio.
- the polymer for the second liquid crystal aligning agent used in the method for producing a liquid crystal aligning film of the embodiment is mixed with the polymer for the first liquid crystal aligning agent which is a partially imidized polymer and used as the liquid crystal aligning agent, so that only the first liquid crystal aligning polymer Compared with the case of use, electrical characteristics of the alignment layer such as voltage holding rat io can be greatly improved.
- X 4 in the repeating unit represented by Chemical Formula 4 is preferably derived from an aromatic structure in terms of improving voltage holding integrity.
- R 9 and R 10 are each independently a short functional group having 3 or less carbon atoms or do not include R 9 and R 10 which are branched structures (P and q are 0). This is more preferable.
- the polymer for the first liquid crystal aligning agent and the polymer for the second liquid crystal aligning agent may be mixed at a weight ratio of about 15:85 to 85:15, preferably about 20:80 to 80:20.
- the first liquid crystal aligning agent since the first liquid crystal aligning agent includes a predetermined amount of imide repeating units imidized, the first liquid crystal aligning agent generates anisotropy by immediately irradiating light without a high temperature heat treatment process after forming a coating film, and then heat treatment is performed. There is a characteristic that the alignment film can be completed, and the polymer for the second liquid crystal aligning agent has a feature of improving electrical characteristics such as voltage retention.
- the 2nd liquid crystal may be used for the outstanding light reaction characteristic and liquid crystal aligning property which the polymer for 1st liquid crystal aligning agent has. Since the excellent electrical properties of the alignment agent polymer can be complemented with each other, a liquid crystal alignment film having more excellent alignment and electrical properties at the same time It can manufacture.
- a method of manufacturing a liquid crystal alignment layer may be provided.
- the method of manufacturing the liquid crystal alignment layer may include a first unit including at least one repeating unit selected from a group consisting of a repeating unit represented by Formula 2 and a repeating unit represented by Formula 3, and a repeating unit represented by Formula 1
- the liquid crystal aligning agent composition containing the polymer for liquid crystal aligning agents, and the polymer for 2nd liquid crystal aligning agents containing the repeating unit represented by General formula (4) is apply
- the method of applying the liquid crystal aligning agent composition to the substrate is not particularly limited, and for example, screen printing, offset printing, flexographic printing, inkjet, or the like may be used.
- the liquid crystal aligning agent composition may be a solution obtained by dissolving or dispersing the polymer for the first liquid crystal aligning agent and the polymer for the crab 2 liquid crystal aligning agent in an organic solvent.
- organic solvent examples include ⁇ , ⁇ -dimethylformamide, ⁇ , ⁇ -dimethylacetamide, ⁇ -methyl ⁇ 2-pyrrolidone, ⁇ -methylcaprolactam, 2-pyridone,
- the liquid crystal aligning agent composition may further include other components in addition to the polymer for the liquid crystal aligning agent and the organic solvent.
- the liquid crystal aligning agent composition when applied, it improves the uniformity and surface smoothness of the film thickness, or improves the adhesion between the photo-alignment film and the substrate, or change the dielectric constant or conductivity of the photo-alignment film
- black may further include an additive that may increase the compactness of the photoalignment layer.
- additives may be exemplified by various solvents, surfactants, silane compounds, dielectrics or crosslinkable compounds. '
- substrate is dried. Drying the coating film may be a method such as heating, vacuum evaporation of the coating film, it is preferably carried out at 50 ° C to 150 ° C, or 60 ° C to 140 ° C.
- the manufacturing method of the liquid crystal aligning film of the said one Embodiment performs an alignment process by irradiating light to the coating film immediately after the said drying step.
- the "coating film immediately after the drying step” means immediately irradiating light without the step of performing heat treatment at a temperature higher than the drying step after the drying step, and other steps other than the heat treatment may be added.
- liquid crystal aligning film using a liquid crystal aligning agent containing a polyamic acid or a polyamic acid ester
- light is emitted.
- the liquid crystal aligning film is manufactured using the liquid crystal aligning agent of the above-described embodiment does not include the heat treatment step, and immediately after irradiating the alignment by irradiation with light, By curing, even under small light irradiation energy A liquid crystal aligning film with enhanced orientation and stability can be produced.
- the light irradiation in the alignment process may be to irradiate the polarized ultraviolet rays of 150 ⁇ to 450 ran wavelength.
- the intensity of exposure varies depending on the type of polymer, and it is possible to 3 ⁇ 4 the energy of 10 mJ / cin 2 to 10 J / cin 2 , preferably the energy of 30 mJ / cin 2 to 2 J / cin 2 .
- a polarizing device using a substrate coated with a dielectric anisotropic material on the surface of a transparent substrate such as quartz glass, soda lime glass, soda lime free glass, 2 a polarizing plate on which fine aluminum or metal wire is deposited, or 3
- An alignment treatment is performed by irradiating polarized ultraviolet rays selected from polarized ultraviolet rays by a method of passing or reflecting through a Brewster polarizer or the like by reflection of quartz glass.
- the polarized ultraviolet rays may be irradiated perpendicularly to the substrate surface, or may be irradiated at an inclined angle at a specific angle. In this way, the alignment ability of the liquid crystal molecules is imparted to the coating film.
- the curing of the alignment-treated coating film may be performed after light irradiation in a method of manufacturing a liquid crystal alignment film using a polymer for a liquid crystal alignment agent that includes a polyamic acid or a polyamic acid ester. Is applied to a substrate, and is subjected to a heat treatment step performed to imidize the liquid crystal aligning agent composition before irradiating light or while irradiating light.
- the heat treatment may be carried out by a heating means such as a hot plate, hot air circulation furnace, infrared furnace, it is preferable to be carried out at 150 ° C to 300 ° C, or 200 ° C to 250 ° C.
- a liquid crystal alignment layer manufactured according to the method of manufacturing the liquid crystal alignment layer of the embodiment may be provided.
- the first liquid crystal essentially includes a repeating unit represented by Formula 1, and includes at least one repeating unit selected from the group consisting of a repeating unit represented by Formula 2 and a repeating unit represented by Formula 3.
- Repeating formula represented by the formula (4) and the polymer for the alignment agent When the polymer for 2nd liquid crystal aligning agents containing a unit is mixed and used, the liquid crystal aligning film in which the orientation and stability were strengthened can be manufactured.
- a liquid crystal display device including the liquid crystal alignment layer described above may be provided.
- the liquid crystal alignment layer may be introduced into the liquid crystal cell by a known method, and the liquid crystal cell may likewise be introduced into the liquid crystal display device by a known method.
- the liquid crystal alignment layer may be prepared by mixing a polymer including a repeating unit represented by Formula 1 and a polymer including a repeating unit represented by Formula 4 to realize excellent stability with excellent physical properties. Accordingly, a liquid crystal display device capable of exhibiting high reliability is provided.
- a liquid crystal aligning agent composition and a method for producing a liquid crystal aligning film are provided which can provide a liquid crystal aligning film which is excellent in orientation and stability through a simple process, and which also has excellent voltage retention and electrical characteristics.
- Diamine DA-1 was synthesized according to the following reaction formula 1.
- Diamine DA-4 was synthesized according to the following reaction formula 2.
- Cyclobutane ⁇ 1,2,3,4 ⁇ tetracarboxylic acid instead of pyromellitic acid anhydride A DA-5 having the above structure was prepared by the preparation example except that dianhydride (CBDA) was used.
- composition of P-6 was quantitatively analyzed as follows.
- the obtained PA-6 solution was coated on a glass substrate, and then subjected to imidization by heat treatment at 300 ° C. for 2 hours.
- the imidation ratio of the material obtained through this process was defined as 100%, and this was analyzed by comparing CN peakUSSOcnf 1 ) of the imide shown in the IR spectrometer with P-6 obtained through the chemical imidization process.
- the 1520cm "1 aromatic peak is set as a standard for normalizing, and the magnitude (I) of CN peaks appearing in the 1380011 -1 bands of PA-6 and P-6 is integrated and substituted into Equation 1 below.
- the imidation ratio was quantified by doing this.
- Imidation ratio (>) [(Il380, P-6 ⁇ ⁇ 520, ⁇ - ⁇ ) / (11380, ⁇ -6 ⁇ 300 ⁇ 11520, ⁇ -6 @ 300)] *
- ⁇ - 6 is ON peak that appears in the 1380cm- 1 vs. ⁇ -6 In size and, I 1520, P eu 6 and the 1520cm- aromat ic greater peak 7] may appear on one, I i380, PA-6 @ 300 ⁇ PA-6 of the material subjected to heat treatment at 300 ° C 1380cm- 1
- the size of CN peak in I 1520 , PA - 6 @ 300 is the size of aromatic peak in 1520cm "1 of the material heat-treated PA-6 at 300 ° C.
- PA-6 was prepared in the same manner as in Synthesis example 6, where 13.0 g of acetic anhydride and 11.5 g of pyridine were used.
- Polymer P-8 was prepared in the same manner as in Synthesis Example 1, except that 5.52 g was added.
- the number average molecular weight (Mn) is 22, 000 g / mc) l
- Synthesis Example 1 5.00g of 4,4'-methylene dianiline (4,4'-methylenedianiline) and 5.05g of 4,4'-oxydianiline (4,4'-oxydiani line) were first dissolved in NMP 221.4g. Thereafter, polymer Q-1 was prepared in the same manner as in Synthesis Example 1, except that 14.55 g of 4,4'-biphthalic anhydride (4,4'-biphthalic anhydride) was added. As a result of confirming the molecular weight of ⁇ -l through GPC, the number average molecular weight (Mn) was 25,000 g / 1 ⁇ 2) l, the weight average molecular weight (Mw) was 40,000 g / m. Synthesis Example 11: Preparation of polymer Q-2 for liquid crystal aligning agent
- Og and the polymer Q-2 l .Og obtained in Synthesis Example 11 were dissolved in a mixed solvent of 30 g of NMP and 8 g of n-butoxyethanol to obtain a 5 wt% solution.
- the obtained solution was filtered under pressure with the filter whose pore size of poly (tetrafluorene ethylene) material is 0.2 m, and liquid crystal aligning agent A-3 was manufactured.
- Og was dissolved in a mixed solvent of 30 g of NMP and 8 g of n-butoxyethanol to obtain a 5 wt% solution.
- the obtained solution was made into poly (tetrafluoreneethylene)
- the liquid crystal aligning agent B-1 was manufactured by pressure filtration with the filter whose pore size of material is 0.2 / mm ⁇ 3>. Comparative Example 2
- Og was dissolved in 30 g of NMP and n-butoxyethane in 8 g of a mixed solvent to obtain a 5 wt% solution. Then, the obtained solution was filtered under pressure with a filter having a pore size of poly (tetrafluoreneethylene) of 0.2 m to prepare a liquid crystal aligning agent C-4.
- a comb-shaped IPS (in-pl ane swi tching) mode IT0 electrode pattern with a thickness of 60 nm, electrode width and spacing between electrodes is formed on a rectangular glass substrate measuring 2.5cm x 2.7cm.
- the liquid crystal aligning agent was apply
- the substrate on which the liquid crystal aligning agent was applied was placed on a hot plate of about 70 ° C., and dried for 3 minutes to evaporate the solvent.
- ultraviolet rays having a wavelength of 254 nm were applied using an exposure machine with a line polarizer attached to each of the upper and lower coating films. Irradiation with an exposure dose of OJ / ciif was carried out.
- the orientation-treated upper and lower plates were baked (cured) for 30 minutes in an oven at about 230 ° C. to obtain a coating film having a film thickness of 0.1.
- a sealing agent impregnated with three sized ball spacers was applied to the edges of the upper plate except for the liquid crystal injection hole.
- the alignment films formed on the upper and lower plates face each other and are aligned so that the alignment directions are parallel to each other.
- the upper and lower plates are bonded to each other to cure the sealing agent, thereby preparing empty cells.
- a liquid crystal was injected into the empty cell to prepare a liquid crystal cell of IPS mode.
- the polarizing plates were attached to the upper and lower plates of the liquid crystal cell manufactured as described above to be perpendicular to each other. At this time, the polarization axis of the polarizing plate attached to the lower plate was to be parallel to the alignment axis of the liquid crystal cell. And the liquid crystal cell with a polarizing plate was put on the backlight of brightness 7,000cd / m ⁇ 2> , and light leakage was observed visually. At this time, if the alignment characteristics of the liquid crystal alignment layer are excellent and the liquid crystals are well arranged, light is not passed through the upper and lower flat plates attached vertically to each other, and the light is darkly observed without defects. In this case, the alignment characteristic is 'good', and when light leakage such as liquid crystal flow marks or bright spots is observed, it is shown in Table 1 as 'bad'.
- the liquid crystal aligning stability was evaluated using the liquid crystal sal attached to the polarizing plate manufactured for said (1) liquid crystal aligning property evaluation.
- the liquid crystal cell attached to the polarizing plate was attached on the backlight of 7,000cd / m 2 and the luminance of the black state was measured using the PR-880 equipment, which is a luminance brightness measurement equipment. Then, the liquid crystal cell was driven for 24 hours at 5V at room temperature. Then, the brightness of the black state was measured in the same manner as described above with the voltage of the liquid crystal cell turned off.
- the difference between the initial luminance L0 measured before driving the liquid crystal cell and the later luminance L1 measured after driving was divided by the initial luminance L0 value and multiplied by 100 to calculate the luminance variation rate.
- the calculated luminance fluctuation rate is closer to 0%, which means that the orientation stability is excellent. If the luminance fluctuation rate is less than 10%, it is shown in Table 1 as 'excellent', 10% or more less than 2 'normal', 20% or more 'bad'.
- the substrate on which the liquid crystal aligning agent was applied was placed on a hot plate of about 70 ° C., dried for 3 minutes to evaporate the solvent.
- ultraviolet rays of 254 nm were irradiated with a U / ciif exposure dose using an exposure machine in which upper and lower plates were coated with linear photons.
- the upper and lower substrates subjected to the alignment treatment were baked and cured in an oven at 230 ° C. for 30 minutes to obtain a coating film having a film thickness of 0.1.
- a sealing agent impregnated with a ball spacer of 4.5 was applied to the upper and lower edges of the glass except for the liquid crystal injection hole.
- VHR voltage retention preservation ratio
- the first liquid crystal aligning jeyong polymer and the second liquid crystal alignment films of Examples 1 to 7 using a liquid crystal aligning agent composition containing both a liquid crystal alignment jeyong polymer is a liquid crystal alignment properties, and stability of the present invention
- Table 1 Comparative Examples 1 to 2 show good results in both the voltage holding retention ratio and the case of using only one type of the polymer for the first liquid crystal aligning agent and the polymer for the second liquid crystal aligning agent, or using a polymer having a different form from that for the first liquid crystal aligning agent.
- the liquid crystal aligning film of 3 showed the poor result in some or all of the said evaluation items.
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US15/765,434 US11347110B2 (en) | 2016-05-13 | 2017-04-21 | Composition for liquid crystal alignment agent, manufacturing method of liquid crystal alignment film, liquid crystal alignment film using the same and liquid crystal display device |
CN201780003594.3A CN108138051B (zh) | 2016-05-13 | 2017-04-21 | 用于液晶取向剂的组合物、液晶取向膜的制造方法、使用其的液晶取向膜和液晶显示装置 |
JP2018519849A JP6790336B2 (ja) | 2016-05-13 | 2017-04-21 | 液晶配向剤組成物、液晶配向膜の製造方法、これを用いた液晶配向膜および液晶表示素子 |
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WO2019044795A1 (ja) * | 2017-08-29 | 2019-03-07 | 日産化学株式会社 | 液晶配向剤、液晶配向膜及び液晶表示素子 |
JPWO2019044795A1 (ja) * | 2017-08-29 | 2020-10-15 | 日産化学株式会社 | 液晶配向剤、液晶配向膜及び液晶表示素子 |
JP7196847B2 (ja) | 2017-08-29 | 2022-12-27 | 日産化学株式会社 | 液晶配向剤、液晶配向膜及び液晶表示素子 |
US20210040390A1 (en) * | 2018-11-20 | 2021-02-11 | Lg Chem, Ltd. | Liquid crystal alignment composition, method of preparing liquid crystal alignment film, and liquid crystal alignment film, and liquid crystal display using the same |
JP2021517272A (ja) * | 2018-11-20 | 2021-07-15 | エルジー・ケム・リミテッド | 液晶配向剤組成物、それを用いた液晶配向膜の製造方法、それを用いた液晶配向膜および液晶表示素子 |
JP7102541B2 (ja) | 2018-11-20 | 2022-07-19 | エルジー・ケム・リミテッド | 液晶配向剤組成物、それを用いた液晶配向膜の製造方法、それを用いた液晶配向膜および液晶表示素子 |
US11512255B2 (en) | 2018-11-20 | 2022-11-29 | Lg Chem, Ltd. | Liquid crystal alignment composition, method of preparing liquid crystal alignment film, and liquid crystal alignment film, and liquid crystal display using the same |
US11667844B2 (en) | 2018-11-20 | 2023-06-06 | Lg Chem, Ltd. | Liquid crystal alignment composition, method of preparing liquid crystal alignment film, and liquid crystal alignment film, and liquid crystal display using the same |
US20210139782A1 (en) * | 2019-01-17 | 2021-05-13 | Lg Chem, Ltd. | Liquid crystal alignment agent composition, method of preparing liquid crystal alignment film, and liquid crystal alignment film, and liquid crystal display using the same |
US11667843B2 (en) * | 2019-01-17 | 2023-06-06 | Lg Chem, Ltd. | Liquid crystal alignment agent composition, method of preparing liquid crystal alignment film, and liquid crystal alignment film, and liquid crystal display using the same |
US11561438B2 (en) | 2019-01-21 | 2023-01-24 | Lg Chem, Ltd. | Liquid crystal alignment agent composition, and liquid crystal alignment film, and liquid crystal display using the same |
Also Published As
Publication number | Publication date |
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US20180298284A1 (en) | 2018-10-18 |
KR20170127966A (ko) | 2017-11-22 |
JP6790336B2 (ja) | 2020-11-25 |
TW201739792A (zh) | 2017-11-16 |
KR101856725B1 (ko) | 2018-05-10 |
WO2017196001A8 (ko) | 2017-12-14 |
JP2018538563A (ja) | 2018-12-27 |
CN108138051A (zh) | 2018-06-08 |
CN108138051B (zh) | 2021-08-20 |
TWI643886B (zh) | 2018-12-11 |
US11347110B2 (en) | 2022-05-31 |
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