WO2007145339A1 - 液晶組成物、カラーフィルタおよび液晶表示装置 - Google Patents
液晶組成物、カラーフィルタおよび液晶表示装置 Download PDFInfo
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- WO2007145339A1 WO2007145339A1 PCT/JP2007/062170 JP2007062170W WO2007145339A1 WO 2007145339 A1 WO2007145339 A1 WO 2007145339A1 JP 2007062170 W JP2007062170 W JP 2007062170W WO 2007145339 A1 WO2007145339 A1 WO 2007145339A1
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- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3833—Polymers with mesogenic groups in the side chain
- C09K19/3842—Polyvinyl derivatives
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- C09K19/00—Liquid crystal materials
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
- C09K19/322—Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring
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- C09K19/38—Polymers
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
- C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
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- C09K2219/00—Aspects relating to the form of the liquid crystal [LC] material, or by the technical area in which LC material are used
- C09K2219/03—Aspects relating to the form of the liquid crystal [LC] material, or by the technical area in which LC material are used in the form of films, e.g. films after polymerisation of LC precursor
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
- G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
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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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/02—Number of plates being 2
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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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/07—All plates on one side of the LC cell
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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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/13—Positive birefingence
Definitions
- Liquid crystal composition Liquid crystal composition, color filter, and liquid crystal display device
- the present invention relates to a liquid crystal composition, a color filter having a retardation layer made of the liquid crystal composition, and a liquid crystal display device using the color filter.
- liquid crystal display devices have a great advantage of being thin and light and have low power consumption, and are therefore actively used in display devices such as personal computers, mobile phones, and electronic notebooks. These liquid crystal display devices perform light switching by utilizing the birefringence of the driving liquid crystal material. Therefore, the liquid crystal display device has a viewing angle dependency and a! / ⁇ ⁇ problem derived from the birefringence of the driving liquid crystal material. In order to solve this problem, various retardation layer forming films have been developed.
- This retardation layer-forming film is usually produced by stretching a film of polyacrylate, polycarbonate, triacetyl cellulose, etc., and is adhered to the outside of a liquid crystal cell in which a driving liquid crystal material is sandwiched between two substrates using an adhesive. Attached.
- the refractive index of the pressure-sensitive adhesive is different from the refractive index of the retardation layer forming film, there is a problem that light is scattered in the transmitted light.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2000-221506
- Patent Document 2 JP 2002-265421 A Patent Document 3: Japanese Patent Laid-Open No. 2002-308832
- the liquid crystal composition useful in the present invention is obtained by adding a specific silane coupling agent and an alcoholic polyfunctional compound together as an additive to a crosslinkable liquid crystal compound.
- a specific silane coupling agent and an alcoholic polyfunctional compound together as an additive to a crosslinkable liquid crystal compound.
- the vertical alignment and hardness of the retardation layer are improved, and by adding an epoxy compound, the durability of the retardation layer and the adhesion to the underlying layer are synergistically synergistic with the above additives (hereinafter referred to as the following). In the present invention, this is sometimes referred to as “base adhesion”).
- the present invention relates to one or more crosslinkable liquid crystal compounds and a sulfide silane coupling agent, a mercapto silane coupling agent, an amino silane coupling agent, or a (meth) ataryloyl silane coupling. Characterized in that it contains at least one silane coupling agent selected from agents, a polyfunctional compound having an alcoholic hydroxyl group and a polymerizable functional group in the molecular structure, and an epoxy compound.
- the gist of the liquid crystal composition is as follows.
- At least one of the crosslinkable liquid crystal compounds may have one or two or more (meth) atalyloyl groups in one molecule.
- the amino silane coupling agent may be a ketimine silane coupling agent.
- the polyfunctional compound may be a polyfunctional (meth) acrylate.
- the polyfunctional (meth) acrylate is 2-hydroxy-13. Dimethacryloxypropane, 2-hydroxy 1-3 dimethacryloxypropane, 2-hydroxy, 1-atari mouth oxy, 3-methacryloxy propane, ethylene bis [oxy (2-hydroxy propane 1,3-diyl)] dimethacrylate , (1-Methyl 1,2 ethanedyl) bis [oxy (2 hydroxy-1,3,1-propanedyl)] diatalylate, bisphenol A-glycidyl metatalylate, bisphenol A-glycidyl acrylate, pentaerythritol dia It may be one or more selected from the group consisting of acrylate monostearate.
- the polyfunctional (meth) acrylate may be pentaerythritol triacrylate.
- the polyfunctional (meth) acrylate may be dipentaerythritol hydroxypenta acrylate.
- the epoxy compound may be an alicyclic epoxy compound having an epoxy group in an alicyclic alkyl group.
- the epoxy compound may have two or more epoxy groups in the molecular structure.
- the liquid crystal composition of the present invention may contain the epoxy compound as a low molecular weight substance.
- the number average molecular weight of the epoxy compound may be 1000 or less.
- the silane coupling agent is 0.
- the liquid crystal composition of the present invention may contain the polyfunctional compound in an amount of 5 to 20% by weight in terms of a compound.
- the liquid crystal composition of the present invention may contain the epoxy compound in an amount of 1 to 20% by weight in terms of a compound.
- the present invention provides a color filter in which at least a colored layer and a retardation layer are laminated in this order or in reverse order directly or indirectly on a transparent substrate, wherein the retardation layer comprises
- the gist of the present invention is a color filter that is formed by cross-linking polymerization with each other.
- the present invention provides a color filter in which a colored layer and a retardation layer are laminated in this order directly or indirectly on a transparent substrate, wherein the retardation layer is described in claim 1.
- a liquid crystal composition is directly applied onto the colored layer to form a liquid crystal coating film, a crosslinkable liquid crystal compound contained in the liquid crystal coating film is oriented, and then the surface of the liquid crystal coating film is irradiated with active radiation.
- the gist of the present invention is a color filter formed by cross-linking polymerization of the crosslinkable liquid crystal compounds.
- the present invention provides a color filter in which a colored layer and a retardation layer are laminated in this order directly or indirectly on a transparent substrate, wherein the retardation layer has a value in terms of a formulation.
- the liquid crystal composition according to claim 1 which comprises a liquid crystal coating film by directly coating on the colored layer, and aligning the crosslinkable liquid crystal compound contained in the liquid crystal coating film.
- the present invention provides a color filter in which a colored layer and a retardation layer are laminated in this order directly or indirectly on a transparent substrate, wherein the retardation layer has a value in terms of a formulation.
- a color filter in which a colored layer and a retardation layer are laminated in this order directly or indirectly on a transparent substrate, wherein the retardation layer has a value in terms of a formulation.
- the liquid crystal composition according to claim 1 which comprises a liquid crystal coating film by directly coating on the colored layer, and aligning the crosslinkable liquid crystal compound contained in the liquid crystal coating film. Irradiate the surface of the liquid crystal coating film with boil.
- the crosslinkable liquid crystal compound is cross-linked with each other, and the cross-linked liquid crystal coating film is baked, and the peeling strength of the retardation layer is evaluated according to JISK5 600-5-6.
- the gist of the color filter is that it is 0 or 1.
- the retardation layer may be home-to-mouth pick oriented.
- the present invention provides the above-described color filter of the present invention and a driving circuit side substrate having at least a liquid crystal driving electrode on a transparent substrate, and the retardation layer and the liquid crystal driving electrode are both inside.
- the gist of the present invention is a liquid crystal display device which is disposed so as to face each other and in which a driving liquid crystal material is sealed between the color filter and the driving circuit side substrate.
- (Meth) atalyloyl group is used as a general term for the two functional groups of “ataryloyl group” and “methataroloyl group”.
- examples of the atalyloyl group include an allyloyloxy group (attalylate group)
- examples of the methacryloyl group include a methacryloyloxy group (methacrylate group).
- (meta) atelate” means “attalate” and “metatalate”.
- Liquid crystal composition refers to (a) at least a crosslinkable liquid crystal compound, a sulfido, mercapto, amino or (meth) attaroyl silane coupling agent, and an alcoholic multifunctional compound. And a composition (mixed form composition), which is a mixture containing other materials used for forming a retardation layer, and (b) the above mixture. It means both a composition (solution form composition) in the form of a solution prepared by dissolving or suspending it in a solvent as a component.
- the liquid crystal composition of the present invention which is the above-mentioned “composition in a solution state” is also referred to as a “liquid crystal composition solution” for convenience.
- Conversion to compound value means that when the liquid crystal composition of the present invention is a mixed composition, the total weight of each compound formulated as a substance constituting the mixture is 100.
- the weight power of the solution is the weight obtained by subtracting the weight of the solvent (i.e., dissolved or dissolved in the solvent). This means the weight ratio of each compound when the total weight of each compound before suspension is 100.
- the expression “% by weight” unless otherwise specified means a value in terms of a compound.
- the "retardation layer” means a layer having a retardation control function capable of optically compensating for changes in the retardation of light (retardation).
- “Home-orifice pick alignment” refers to an alignment state in which the optical axes of liquid crystal molecules constituting the retardation layer rise up perpendicularly or substantially perpendicularly to the substrate surface.
- “the retardation layer is homeotropically oriented” means that the liquid crystal molecules constituting the retardation layer are vertically aligned.
- the ideal homeotropic orientation of the retardation layer means the refractive index nx and y axis in the X axis direction when xyz orthogonal coordinates are assumed with the thickness direction of the retardation layer as the z axis.
- the liquid crystal composition of the present invention is coated on a substrate such as a glass substrate to form a liquid crystal coating film, the liquid crystal molecules contained therein are aligned, and then the liquid crystal coating film is cured.
- the phase difference layer is excellent in hardness and substrate adhesion to the underlayer. Therefore, a color filter in which a retardation layer is formed from the liquid crystal composition of the present invention and a liquid crystal display device using this color filter as a display side substrate are manufactured at low cost and have an excellent viewing angle improvement effect over a long period of time. When the hardness and adhesion to the substrate are exhibited, a wrinkle effect is achieved.
- the liquid crystal composition of the present invention improves the vertical alignment of the liquid crystal molecules by adding a sulfide, mercapto, amino or (meth) acryloyl silane coupling agent to the crosslinkable liquid crystal compound. To do. Therefore, even if it is difficult to obtain a good vertical alignment of liquid crystal molecules, such as when the surface of a base layer such as a colored layer is subjected to a cleaning treatment or a surface modification treatment, the vertical alignment is difficult.
- the liquid crystal molecules can be vertically aligned without using a film.
- the compatibility between the crosslinkable liquid crystal compound and the silane coupling agent is improved.
- the retardation layer formed by polymerizing and fixing the liquid crystal molecules contained in the liquid crystal composition, and the underlayer Speaking of power only from the viewpoint of improving adhesion for example, a method of separately forming an adhesive layer between the two can also be adopted.
- a method of separately forming an adhesive layer between the two it is necessary to perform a step of coating and fixing the adhesive layer on the base layer prior to the formation of the retardation layer.
- the thickness of the color filter and the entire liquid crystal display device is increased, and the adhesive layer is scattered by the adhesive layer, which may deteriorate the optical characteristics of the color filter and the like.
- the number of steps for preparing the retardation layer is increased, the thickness of the retardation layer is increased, and the optical properties are decreased.
- the retardation layer obtained using the liquid crystal composition of the present invention is excellent in alignment stability as described above, it exhibits an excellent retardation control function and is effective in improving the viewing angle of a liquid crystal display device.
- a big contribution That is, there is no light leakage when the color filter of the present invention is observed with a polarizing microscope between a pair of linear polarizing plates installed in a cross-col state.
- this color filter when this color filter is used in a liquid crystal display device, a dark display (black display) without light leakage and a bright display (white display) with high brightness are obtained, and a high-quality display with a high contrast ratio is obtained. It is possible to provide.
- FIG. 1 is a longitudinal sectional view showing an embodiment of a color filter of the present invention.
- FIG. 2 is a longitudinal sectional view showing an example of a liquid crystal display device using the color filter of the present invention.
- FIG. 3 is a diagram showing a phase difference measurement direction of a sample.
- the crosslinkable liquid crystal composition of the present invention may include (1) a crosslinkable liquid crystal compound, (2) a sulfide-based silane coupling agent, and mercapto. At least one silane coupling agent selected from a silane coupling agent, (3) a polyfunctional compound having an alcoholic hydroxyl group and a polymerizable functional group in the molecular structure, and (4) an epoxy compound (5) ) It is added to a solvent.
- a crosslinkable nematic liquid crystal As the crosslinkable liquid crystal compound used in the liquid crystal composition of the present invention, a crosslinkable nematic liquid crystal can be used.
- the crosslinkable nematic liquid crystal for example, a (meth) acryloyl group, an epoxy group, or And monomers, oligomers, polymers, etc. having at least one polymerizable group such as a group or isocyanate group.
- one compound or two or more kinds of compounds represented by the following general formula (1) shown in Chemical Formula 1 or the following general formula (2) shown in Chemical Formula 2 is used.
- a mixture, one compound or a mixture of two or more of the compounds shown in Chemical Formula 3 or Chemical Formula 4 or a combination thereof can be used.
- at least one kind of the crosslinkable nematic liquid crystal compound constituting the crosslinkable liquid crystal compound in the present invention has one or more (meth) attalyloyl groups in one molecule.
- a sulfide-type, mercapto-type, amino-type, or (meth) ataryloyl-type silane coupling agent is added to a liquid crystal composition containing a crosslinkable liquid crystal compound.
- a retardation layer is formed on the surface of an underlayer such as a substrate using the liquid crystal composition of the present invention, the crosslinkable liquid crystal compound constituting the retardation layer is well aligned with respect to the underlayer. Is possible.
- the mechanism by which the above-described good vertical alignment is realized by the present invention is not clear. However, the following can be considered with the above mechanism.
- the silane coupling agent is present in the coating film by being dispersed. And the silane cutlet Due to the presence of the crosslinking agent, the crosslinkable liquid crystal compound constituting the coating film is well aligned vertically. More specifically, the silane coupling agent is not only the orientation of the crosslinkable liquid crystal compound existing in the interface region between the coating film and the underlayer, or in the interface region between the coating film and the air layer. It also has a good effect on the orientation of the crosslinkable liquid crystal compound existing in the intermediate region.
- the crosslinkable liquid crystal compound present in the intermediate region of the coating film Shows a good home-to-mouth pick orientation due to the presence of the silane coupling agent. Then, the cross-linkable liquid crystal compound existing in the interface region between the coating film and the underlayer and the interface region between the coating film and the air layer is favorably controlled by the good homeotropic pick orientation of the cross-linkable liquid crystal compound in the intermediate region. It is considered to be home-to-mouth pick orientation.
- R 1 and R 2 each represent hydrogen or a methyl group.
- at least one of R 1 and R 2 is hydrogen, and it is more preferable that both are hydrogen.
- X in the general formula (1) and Y in the general formula (2) are any of hydrogen, chlorine, bromine, iodine, an alkyl group having 1 to 4 carbon atoms, a methoxy group, a cyano group, and a -tro group. Also good.
- X and Y are preferably chlorine or a methyl group.
- the crosslinkable liquid crystal compound represented by the general formulas (1) and (2) has an alkylene group between a (meth) attaylyloxy group located at both ends of the molecular chain and an aromatic ring located in the middle.
- a and b, and d and e, which indicate the chain length of the alkylene group, can be individually determined as integers in the range of 2 to 12, and are preferably in the range of 4 to 10. More preferably, it is in the range of 9.
- the compound of the general formula (1) or the compound of the general formula (2) in which a and b, or d and e are each 13 or more tends to have a low isotropic phase transition temperature (TI).
- these compounds of the general formula (1) or (2) have a liquid crystallinity temperature range (temperature range in which the liquid crystal phase is maintained) when a and b or d and e are each 13 or more.
- TI isotropic phase transition temperature
- these compounds of the general formula (1) or (2) have a liquid crystallinity temperature range (temperature range in which the liquid crystal phase is maintained) when a and b or d and e are each 13 or more.
- TI isotropic phase transition temperature
- the retardation amount and orientation characteristics of the retardation layer are determined by the birefringence ⁇ of the crosslinkable liquid crystal compound and the thickness of the retardation layer.
- ⁇ of the crosslinkable liquid crystal compound is preferably about 0.03 to 0.20, more preferably about 0.05 to 0.15.
- the crosslinkable liquid crystal compound is preferably blended so as to be 70% by weight or more, preferably 75% by weight or more, in terms of the formulation.
- the total of components such as a silane coupling agent, a polyfunctional compound, an epoxy compound, and a photopolymerization initiator added to the crosslinkable liquid crystal compound is It is preferable not to exceed 30% by weight in terms of the formulation.
- the addition amount of the crosslinkable liquid crystal compound is not limited to the above range.
- the addition amount of the crosslinkable liquid crystal compound may be appropriately determined in consideration of the addition amount of other additives. For example, in the case of obtaining a so-called negative C plate generally formed by adding a chiral agent to be described later, it does not exclude that the amount of the crosslinkable liquid crystal compound added is less than 70% by weight.
- the optical axis of the liquid crystal molecules faces the normal direction of the retardation layer, and an anomaly greater than the ordinary refractive index.
- a so-called positive C plate having a light refractive index in the normal direction of the retardation layer can be formed.
- a vertical alignment film is previously formed on the application surface of the liquid crystal composition.
- a vertical alignment aid is mixed in the liquid crystal composition.
- Examples of vertical alignment aids include surface coupling agents having vertically aligned alkyl or fluorocarbon chains such as lecithin and quaternary ammonium surfactants, HTAB (hexadecyl-trimethylammonium bromide) , DMOAP (N, N-dimethyl-1-N-octadecyl-3-aminopropyltrimethoxysilyl chloride), N-perfluorooctylsulfol-3-aminopropyltrimethylammodium, long-chain alkyl alcohol, A silane polymer etc. can be mentioned.
- surface coupling agents having vertically aligned alkyl or fluorocarbon chains such as lecithin and quaternary ammonium surfactants, HTAB (hexadecyl-trimethylammonium bromide) , DMOAP (N, N-dimethyl-1-N-octadecyl-3-aminopropyltrimethoxy
- the surface of a substrate or the like on which a colored layer is formed on a glass substrate by adding a specific silane coupling agent described later to the crosslinkable liquid crystal compound.
- the liquid crystal composition of the present invention is applied, aligned, and cured, the liquid crystal molecules in the liquid crystal composition are stably aligned vertically regardless of the surface properties of the substrate without using an alignment film. be able to.
- the liquid crystal composition of the present invention is directly applied to the covering substrate surface, and the liquid crystal contained in the composition The retardation layer can be formed without disturbing the molecular orientation.
- the inventors' knowledge has clarified that the effect of stabilizing the homeotopic orientation is synergistically enhanced by adding the vertical alignment aid.
- the specific mechanism of the synergistic effect is not necessarily clear, but at least a part of the amino-based silane coupling agent added to the liquid crystal composition is coupled with the vertical alignment aid, so that the base in the retardation layer can be obtained. It is presumed that the regulating force to vertically align the liquid crystal molecules is exerted not only on the liquid crystal molecules facing the material interface and the air interface but also on the whole including the intermediate part of the retardation layer.
- a so-called negative C plate having a normal direction of the retardation layer can be formed.
- a crosslinkable nematic liquid crystal compound a chiral nematic liquid crystal compound having a cholesteric regularity added with a chiral agent can be preferably used.
- a chiral agent is a low molecular weight compound having an optically active site in a molecule.
- the molecular weight of the chiral agent added to the liquid crystal composition of the present invention is preferably 1500 or less.
- the chiral agent is used for the purpose of inducing a helical pitch in the positive-axis nematic regularity expressed by the crosslinkable liquid crystal compounds shown in the above chemical formulas 1 to 4.
- the chiral agent the following compounds shown in Chemical formula 5 can be exemplified.
- it is compatible with the crosslinkable liquid crystal compounds shown in Chemical Formulas 1 to 4 in a solution state or in a molten state, and can induce a helical pitch without impairing the liquid crystal properties of the crosslinkable liquid crystal compound.
- it is not limited to the compound shown in Chemical formula 5.
- those having crosslinkable functional groups at both ends of the molecule are preferred for obtaining optical elements because of their good heat resistance.
- Chiral agents that can be used in the present invention include an asymmetric point on a heteroatom such as a compound having one or more asymmetric carbons, a chiral amine, a chiral sulfoxide, and the like. And compounds having axial asymmetry such as cumulene and binaphthol.
- a commercially available chiral nematic liquid crystal compound more specifically, S-811 manufactured by Merck can be used.
- the nematic regularity of the crosslinkable liquid crystal compound may be destroyed or the orientation may be lowered.
- the curability of the crosslinkable liquid crystal compound is decreased, and the electrical reliability of the retardation layer formed by curing the crosslinkable liquid crystal compound is improved. There is a risk of lowering. Further, when a large amount of chiral agent having an optically active site is used, the cost increases. Therefore, as the chiral agent used in the present invention, it is preferable to select a chiral agent having a large effect of inducing a helical pitch in the orientation of the liquid crystalline polymer. Specifically, the following general formulas (3) to (5) are preferred. It is preferable to use a low molecular weight compound having an axial asymmetry in the molecule.
- R 4 represents hydrogen or a methyl group.
- Z in the general formulas (3) and (4) is one of (i) to (xxiv) shown in the following chemical formulas 6 and 7. Of these, any one of formulas (i), (ii), (iii), (v) and (vii) is preferred.
- f and g represent the number of repeating alkylene groups. More preferably, f and g are in the range of 2 to 12 which may be the same or different.
- the compound of the general formula (3) in which f is 0 or 1 and the compound of the general formula (4) in which g is 0 or 1 are not preferable because they lack stability, are readily hydrolyzed, and have high crystallinity immediately. .
- the compound of the general formula (3) in which f is 13 or more and the compound of the general formula (4) in which g is 13 or more are not preferable because of low melting point (Tm).
- Tm low melting point
- H in the general formula (5) is preferably an integer of 2 to 5.
- Z in the formulas (i) and (ii) shown in the following chemical formula 6 is hydrogen, chlorine, bromine, iodine, an alkyl group having 1 to 4 carbon atoms, a methoxy group, and a cyano group. Or-Toro!
- the optimum range of the chiral agent is determined by the helical pitch to be induced in the liquid crystal molecules constituting the crosslinkable liquid crystal compound and the liquid crystal molecules contained in the retardation layer to be finally obtained. It is determined appropriately in consideration of the degree of cholesteric regularity of the liquid crystal and depends on the type of liquid crystal molecules. Very different. Specifically, the chiral agent is generally from 0.01 to 30% by weight, preferably from 0.1 to 20% by weight, more preferably from 0.5 to 15% by weight in terms of the compound. It is blended as follows. A particularly preferable amount of the chiral agent is 1 to 15% by weight with respect to the compound.
- the cholesteric regularity may not be sufficiently imparted to the liquid crystal molecules contained in the liquid crystal composition.
- the content of the chiral agent exceeds 30% by weight, the alignment performance of the liquid crystal molecules in the liquid crystal composition is hindered, and the curing rate decreases when the liquid crystal molecules are crosslinked and polymerized to cure the liquid crystal composition. And may cause problems such as a reduction in crosslink density.
- the blending amount of the chiral agent is within the above-mentioned preferable numerical range, both the orientation of the negative C plate and the crosslinking curability can be sufficiently enhanced, and good optical properties of the retardation layer can be obtained.
- the chiral agent used in the present invention does not necessarily have crosslinkability.
- a crosslinkable chiral agent that can be polymerized with the above-described crosslinkable liquid crystal compound and fix the cholesteric regularity.
- the optical axis of the liquid crystal molecules is parallel to the phase difference layer, and the ordinary ray refraction is performed.
- a so-called positive A plate having an extraordinary ray refractive index larger than the refractive index in the in-plane direction of the retardation layer can be formed.
- the liquid crystal composition is loaded with a leveling agent for suppressing the surface free energy of the liquid crystal molecules with respect to the air interface or by applying the alignment regulating force by the horizontal alignment film subjected to the rubbing treatment to the liquid crystal molecules. By adding calorie, liquid crystal molecules can be aligned horizontally.
- a silane coupling agent is blended in the liquid crystal composition of the present invention.
- the silane coupling agent include a silane coupling agent having a sulfide group (ie, a sulfide-based silane coupling agent) as a functional group in the molecular structure, and a silane coupling agent having a mercapto group.
- a silane coupling agent having an amino group that is, an amino-based silane coupling agent
- a silane having a (meth) atalyloyl group or a mixture of two or more.
- the hardness of the retardation layer and the substrate adhesion are combined with a polyfunctional compound having an alcoholic hydroxyl group described later. The effect of improving is demonstrated.
- the effect of improving the vertical alignment property of the crosslinkable liquid crystal compound can also be enjoyed.
- Specific sulfid silane coupling agents used in the present invention include, for example, bis [3- (triethoxysilyl) propyl] tetrasulfide (KBE-846 manufactured by Shin-Etsu Chemical Co., Ltd.), bis [ 3- (triethoxysilyl) propyl] disulfide (SIB1824.6 from Gelest), bis [m- (2-triethoxysilylethyl) tolyl] polysulfide (SIB1820.5 from Gelest), and the like.
- KBE-846 manufactured by Shin-Etsu Chemical Co., Ltd.
- SIB1824.6 bis [ 3- (triethoxysilyl) propyl] disulfide
- SIB1820.5 bis [m- (2-triethoxysilylethyl) tolyl] polysulfide
- Specific mercapto silane coupling agents used in the present invention include, for example, 3-mercaptopropylmethyldimethoxysilane (KBM-802 manufactured by Shin-Etsu Chemical Co., Ltd.), 3-mercaptopropyltrimethoxysilane (Shin-Etsu).
- KBM-803 manufactured by Egakusha
- TSL8380 manufactured by Toshiba Silicone
- 3-mercaptopropyltriethoxysilane SIM6475.0 manufactured by Gelest
- 11-mercaptodecyltrimethoxysilane SIM6480.0 manufactured by Gelest
- Examples include mercaptomethylmethyl ethoxysilane (Gelest SIM6473.0), S- (otatanyl) mercaptopropyltriethoxysilane (Gelest SIM6704.0).
- the amino-based silane coupling agent used in the present invention includes, in addition to the compounds classified as so-called primary amine, secondary amine, and tertiary amine, Also included are compounds having a structure in which a group is reversibly masked. Specific examples of the “compound having a structure in which an amino group is reversibly masked in the molecule” include ketimine silane coupling agents. The “structure in which the amino group is reversibly masked” specifically includes a ketimine structure. The ketimine structure includes the ketone group in a compound having a ketone group and the amino group in a compound having a primary amino group. It is a structure formed by reaction with a group.
- Specific amino silane coupling agents used in the present invention include, for example, N-2
- a retardation layer is formed using the liquid crystal composition of the present invention, it is possible to form a retardation layer that is remarkably excellent in transparency.
- a ketimine-based silane coupling agent is preferably used among the plurality of amino-based silane coupling agents.
- ketimine-based silane coupling agent examples include 3 triethoxysilyl N- (1,3 dimethylpropylidene) propylamine (KBE-9103 manufactured by Shin-Etsu Chemical Co., Ltd.), 3 —Trimethoxysilyl—N— (Jetyl-methylidene) propylamine, 3-Trimethoxysilyl—N— (1-ethyl-propylidene) propylamine, 3 Trimethoxysilyl—N— (1-ethyl-pentylidene) propylamine, 3 Trimethoxysilyl— N— (1 methyl-butylidene) propylamine, 3 trimethoxysilyl—N— (1,3 dimethyl-butylidene) propylamine, 3 trimethoxysilyl—N— (2,2, dimethyl-pentylidene) propylamine, 3 trimethoxy Silyl mono-N— (1,2-methyl monopropy
- Specific examples of the (meth) atalyloyl-based silane coupling agent used in the present invention include 3-methacryloxypropylmethyldimethoxysilane (KBM-502 manufactured by Shin-Etsu Chemical Co., Ltd., TSL8375 manufactured by Toshiba Silicone), 3—Methacryloxypropyltrimethoxysilane (KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd., TSL8370 manufactured by Toshiba Silicone), 3—Methacryloxypropylmethyl jetoxysilane (KBE-502 manufactured by Shin-Etsu Chemical Co., Ltd.), 3— Methacryloxypropyltriethoxysilane (KBE-503 manufactured by Shin-Etsu Chemical Co., Ltd.), 3-Atalyloxypropyltrimethoxysilane (KBM-5103 manufactured by Shin-Etsu Chemical Co., Ltd.), (3-Atalyloxypropyl) trimethoxysilane (Geles
- Two or more different silane coupling agents may be used in combination. Specifically, two or more types of sulfide, mercapto, amino, or (meth) attalyloyl silane coupling agents selected from the same silane coupling agent may be used in combination, or You can select one or more types of silane coupling agents from different systems and use them in combination!
- the compounding amount of the silane coupling agent is 0.01 to 20% by weight, preferably 0.01 to 5% by weight, more preferably 0.01 to 2% by weight in terms of the amount of the liquid crystal composition. %, More preferably 0.1 to 2% by weight.
- crosslinkable liquid crystal compound used in the liquid crystal composition of the present invention and the silane coupling agent are preferably in the range of 100, 0.00 to 5.5, more preferably in the range of 100: 0.00. 01 to: L 1, particularly preferably ⁇ , 100: 0. 01 to 0.5.
- the polyfunctional compound used in the liquid crystal composition of the present invention is a molecule containing two or more polymerizable functional groups in the molecular structure, and the polyfunctional compound is an alcoholic compound in the molecular structure. Those having a hydroxyl group can be preferably used.
- the number of alcoholic hydroxyl groups contained in this polyfunctional compound is preferably 1 to 3.
- the ability to be 1 or 2 is effective because it effectively makes the alignment of liquid crystal molecules difficult to disturb. preferable.
- Examples of the polymerizable functional group in the polyfunctional compound include a (meth) acrylate group, an epoxy group, and an oxetane group. Because of its high reactivity, polyfunctional (meth) acrylates that contain (meth) acrylates as polymerizable functional groups are preferred.
- Examples of the polyfunctional (meth) acrylate having an alcoholic hydroxyl group include monomers, oligomers and polymers having at least one alcoholic hydroxyl group in one molecule.
- alcoholic polyfunctional (meth) acrylate one compound or a mixture of two or more of the compounds shown in the following chemical formula 8 can be used.
- R 1 represents an organic hydrocarbon structure having one or more carbon atoms
- R 2 represents hydrogen or a methyl group, respectively.
- Fig. 8 Specific examples of the compounds shown in Fig. 8 include 2-hydroxy 1-3 dimethacryloxypropan, 2-hydroxy 1-3 dimethacryloxypropane, 2-hydroxy, 1-atari mouth oxy, 3— Methacryloxypropane, ethylenebis [oxy (2-hydroxypropane-1,3-diyl)] dimethatalylate, (1-methyl-1,2-ethanediyl) bis [oxy (2-hydroxy-1,3-propanediyl)] diatalylate, bis Mention may be made of phenol A-glycidyl metatalylate, bisphenol A-glycidyl attalate, pentaerythritol diacrylate monostearate, pentaerythritol tritalate, dipentaerythritol hydroxypentaacrylate.
- the molecular weight of the polyfunctional compound to be blended in the liquid crystal composition of the present invention is not particularly limited, but the molecular weight is preferably 1000 or less from the viewpoint of compatibility with the crosslinkable liquid crystal compound.
- the polyfunctional compound needs to be added within a range that does not significantly impair the alignment of the liquid crystal, and is 5.0 to 20% by weight, preferably 10 to 15% by weight in terms of the formulation of the liquid crystal composition. % So that it becomes%.
- the addition amount is 5.0% by weight or more, the hardness of the retardation layer can be sufficiently improved, and by setting this amount to 20% by weight or less, the disorder in aligning the crosslinkable liquid crystal is prevented. The possibility of occurrence is suppressed.
- an alicyclic epoxy compound having an epoxy group in the alicyclic alkyl group is particularly preferably used. According to the knowledge of the present inventors, when the alicyclic epoxy compound is added as compared with the chain epoxy compound, the substrate adhesion of the retardation layer formed by polymerizing and curing the liquid crystal composition is further improved. It was found that it can be improved favorably.
- liquid crystal composition of the present invention which has two or more epoxy groups in the molecular structure, exhibits the effect of particularly preferably improving the substrate adhesion. Therefore, the liquid crystal composition of the present invention having both good vertical alignment properties and high hardness at the time of polymerization and curing becomes more useful by using such an epoxy compound.
- the epoxy compound used in the present invention is preferably contained in the liquid crystal composition as a low molecular weight substance (monomer, oligomer).
- a low molecular weight substance monomer, oligomer.
- an epoxy polymer (polymer) compound having an average degree of polymerization of 10 or more is used, sufficient compatibility with the crosslinkable liquid crystal compound cannot be obtained, and the polymer does not exhibit the orientation of the liquid crystal molecules. There is a risk of hindering. This On the other hand, if you use a low molecular weight epoxy compound, there will be no power!
- the effect of improving the adhesion of the retardation layer to the base material is improved compared to the case of using the polymer. It is preferable because it becomes higher per total amount.
- the low molecular weight epoxy compound used in the present invention preferably has an average degree of polymerization of 1 or more and less than 10, particularly an average degree of polymerization of 1, that is, a monomer (monomer). preferable.
- the low molecular weight substance of the epoxy compound suitably used in the present invention is defined by the number average molecular weight, it is preferably 1000 or less, and more preferably 800 or less.
- the compounding amount of the epoxy compound is preferably 1 to 20% by weight, preferably 5 to: LO% by weight, in terms of the compound in the liquid crystal composition.
- the compounding amount of the epoxy compound is preferably 1 to 20% by weight, preferably 5 to: LO% by weight, in terms of the compound in the liquid crystal composition.
- the crosslinkable liquid crystal compound contained in the liquid crystal composition is photopolymerizable and is When polymerizing and curing by exposure to any active radiation, a photopolymerization initiator is preferably added to the liquid crystal composition.
- the photopolymerization initiator is formed by coating the liquid crystal composition of the present invention on an underlayer such as a substrate to form a liquid crystal coating film, and orienting liquid crystal molecules contained in the film in a predetermined direction.
- the liquid crystal coating film is irradiated with actinic radiation to cross-link liquid crystal molecules to form a retardation layer, it functions as an initiator for cross-linking the liquid crystal molecules.
- a radical polymerization initiator is a compound that generates free radicals by the energy of actinic radiation.
- examples of the radical polymerizable initiator include benzophenone derivatives such as benzoin and benzophenone or derivatives thereof; xanthone and thixanthone derivatives; chlorosulfonyl, chloromethyl polynuclear aromatic compounds, chloromethyl heterocyclic compounds, and the like.
- halogen-containing compounds such as chloromethylbenzophenones; triazines; fluorenones; haloalkanes; redox couples of photoreductive dyes and reducing agents; organic sulfur compounds; peracid compounds Etc. can be used.
- photopolymerization initiators include Irgacure 184, Irgacure 369, Irgacure 651, Irgacure 907 (all manufactured by Chinoku 'Specialty' Chemicals), Darocur I (Merck). ), Ade force 1717 (Asahi Denki Kogyo Co., Ltd.), 2, 2 '-screw (o-black mouth file) 1, 4, 5, 4, one tetrafel 1, 2, 1, Ketone-based and biimidazole-based compounds such as biimidazole (manufactured by Kurokin Kasei Co., Ltd.) are preferred.
- These photopolymerization initiators can be used alone or in combination of two or more. When two or more types are used in combination, it is better to combine photopolymerization initiators having different absorption wavelengths so as not to impede the respective absorption spectral characteristics.
- the photopolymerization initiator needs to be added within a range that does not significantly impair the orientation of the crosslinkable liquid crystal compound. Specifically, it is 0.01 to 15% by weight, preferably 0.1 to 12% by weight, more preferably 0.1 to 10% by weight, and particularly preferably 0. A photopolymerization initiator may be added so as to be 5 to 10% by weight.
- a polymerization inhibitor, a sensitizer, Z, a surfactant, and the like can be added in the range where the object of the present invention is not impaired.
- polymerization inhibitors examples include p-benzoquinone, hydroquinone, p-t-butylcatechol, di-t-butyl'paracresol, 2,4,6-tri-t-butylphenol, hydroxy monomethyl ether, ⁇ -naphthol or aceto-azine. Acetate can be used.
- a crosslinkable liquid crystal compound a sulfido, mercapto, amino, or (meth) atalyloyl silane coupling agent, an alcoholic polyfunctional compound, an epoxy compound, and light
- the content of the polymerization initiator can be appropriately adjusted depending on the specific compound selected from each of the above-described numerical ranges indicating the preferable content and the type of solvent described later. For example, the amount of each formulation contained in the liquid crystal composition, against formulations conversion value, (a) a crosslinkable liquid crystal compounds containing a (meth) Atariroiru group from 93.89 to 70 weight 0/0, (b) 0.
- the liquid crystal composition of the present invention is preferably used as a solution obtained by dissolving the above-mentioned compound components in a solvent in order to improve the coating property to the underlayer.
- the solvent is not particularly limited as long as it can dissolve compound components such as the above-mentioned crosslinkable liquid crystal compounds and silane coupling agents and does not impair the performance of the counterpart material to be applied. It ’s not something that ’s done.
- Specific solvents include hydrocarbons such as benzene, toluene, xylene, n-butylbenzene, ethylbenzene, and tetralin; ethers such as methoxybenzene, 1,2-dimethoxybenzene, and diethylene glycol dimethyl ether; acetone, Ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, 2, 4 pentanedione; ethyl acetate, ethylene glycol monomethyl ether acetate, propylene glycol nole monomethinoatenoacetate, propylene glycol nolemonoethylenotenoarea Esters such as cetate and butyrolatatatone; Amide solvents such as 2-pyrrolidone, N-methyl-2-pyrrolidone, dimethylformamide, dimethylacetamide, etc .; Cloform form, dichloromethane,
- a single solvent alone may result in insufficient solubility of a compound component such as a crosslinkable liquid crystal compound, or may affect the other material to which the liquid crystal composition solution is applied. In some cases, these inconveniences can be avoided by using a mixture of two or more solvents.
- the solvents described above examples of the solvent that can be suitably used alone include hydrocarbon solvents and glycol monoether acetate solvents.
- a preferable mixed solvent in which two or more kinds are used in combination includes a combination of ethers or ketones and glycols.
- the concentration of the compound component of the liquid crystal composition solution varies depending on the solubility of the compound component used in the liquid crystal composition in the solvent, the layer thickness desired for the retardation layer, and the like. Specifically, it is preferable to be in the range of 1 to 60% by weight, preferably 3 to 40% by weight.
- the concentration can be determined by multiplying the weight of the liquid crystal composition solution by subtracting the weight of the solvent and the total weight of the liquid crystal composition solution and multiplying by 100.
- the liquid crystal composition of the present invention can be used for forming a retardation layer for adjusting a viewing angle in a liquid crystal display device.
- the retardation layer can be provided in an optical element typified by a color filter of a liquid crystal display device, for example.
- the color filter of the present invention provided with the retardation layer will be exemplarily described based on the drawings.
- FIG. 1 shows an embodiment of a color filter 1 according to the present invention
- 2 is a transparent substrate
- 3 is a colored layer
- 4 is a retardation layer formed of the liquid crystal composition of the present invention.
- the color filter 1 includes a black matrix 5 (BM), a red (R) sub-pixel 6, a green (G) sub-pixel 7, and a blue (B) sub-pixel 8 on a transparent substrate 2.
- the colored layer 3 is formed, and the retardation layer 4 formed using the liquid crystal composition of the present invention is laminated on the surface of the colored layer 3.
- the transparent substrate 2 preferably has optical transparency and is optically isotropic. However, as the transparent substrate 2, a substrate in which an optically anisotropic or light-shielding region is locally provided can be used as necessary.
- the light transmittance of the transparent substrate 2 can be appropriately selected according to the use of the color filter.
- organic base materials in addition to inorganic base materials such as glass, silicon, and quartz, organic base materials as listed below can be used.
- organic substrates include acrylics such as polymethyl methacrylate, polyamide, polyacetal, polybutylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, or syndiotactic polystyrene, poly-phenylene sulfide, polyether ketone, Polyetheretherketone, fluorine resin, polyether-tolyl, etc., polycarbonate, modified polyphenylene ether, polycyclohexene, polynorbornene-based resin, etc., or polysulfone, polyethersulfone, polypropylene, polyarylate , Polyamideimide, polyetherimide, polyetherketone, or thermoplastic polyimide.
- a material having a general plastic force can be used as the transparent substrate 2.
- the color filter of the present invention when used in a liquid crystal display device, it is preferable to use an alkali-free glass as the transparent substrate 2 without containing an alkali component in the glass.
- the thickness of the transparent substrate 2 is appropriately determined according to the use of the color filter, and for example, a thickness of about 5 ⁇ m to 3 mm is used.
- a light-blocking or light-absorbing black matrix (BM) 5 is formed in advance in a stripe shape or a mosaic shape. Good.
- a colored resist of each color of RGB is applied onto the transparent substrate 2 by a photolithography method or an ink jet method, and further heated and baked to thereby produce red (R) sub-pixels 6 and green (G ) Sub-pixel 7 and blue (B) sub-pixel 8 are sequentially provided to form the colored layer 3.
- the colored resist can be obtained by dispersing coloring materials of various colors such as pigments in a solvent.
- the colored layer 3 is generally subjected to a surface modification treatment such as a UV cleaning treatment or a corona treatment in order to remove impurities on the surface and improve the wettability with respect to the liquid crystal composition.
- a surface modification treatment such as a UV cleaning treatment or a corona treatment
- the wettability of the liquid crystal molecules contained therein can be improved.
- the ultraviolet irradiation amount is 500 mj / cm 2 to 3000 mj / cm 2 , more preferably 900 mjZcm 2 to 3000 mjZcm 2 .
- the wettability of the surface of the colored layer is preferably improved, but the surface property of the colored layer 3 changes greatly.
- a liquid crystal coating film was formed by directly applying the liquid crystal composition to the surface of the colored layer washed with an ultraviolet irradiation amount of 900 mjZcm 2 or more using a conventional liquid crystal composition without providing a vertical alignment film.
- the liquid crystal molecules in the liquid crystal composition can be obtained without the presence of the vertical alignment film even on the surface of the colored layer washed with the ultraviolet irradiation amount of 900 mjZcm 2 or more. Can be well aligned vertically.
- a retardation layer in which liquid crystal molecules are stably vertically aligned that is, a high-quality positive C plate can be provided.
- the liquid crystal composition of the present invention is applied to form a liquid crystal coating film.
- the liquid crystal composition can be applied by various printing methods such as gravure printing method, offset printing method, relief printing method, screen printing method, transfer printing method, electrostatic printing method, plateless printing method, gravure coating method, roll coating method.
- Method, knife coating method, air knife coating method, bar coating method, date coating method, kiss coating method, spray coating method, die coating method, comma coating method, inkjet method, spin coating method, slit coating method, etc. are used as appropriate. be able to.
- the solvent is vaporized by drying under normal pressure or reduced pressure, and orientation is imparted to the liquid crystal molecules contained in the liquid crystal coating film.
- the liquid crystal molecules in the liquid crystal coating film are vertically aligned and cross-linked.
- Let Giving vertical alignment to liquid crystal molecules means heating the liquid crystal coating film by means of heating with infrared rays, etc., and setting the temperature of the liquid crystal coating film to the crosslinkable liquid crystal contained in the liquid crystal phase. Above the temperature (liquid crystal phase transition temperature), the crosslinkable liquid crystal becomes an isotropic phase (liquid phase). Temperature (isotropic phase transition temperature).
- the vertical alignment is improved by blending a sulfido, mercapto, amino or (meth) attalyloyl silane coupling agent into a crosslinkable liquid crystal compound. It was clear that we could do it. Therefore, even when the surface of the colored layer 3 is subjected to UV cleaning treatment or surface modification treatment with an ultraviolet irradiation amount of 900 mjZcm 2 or more as described above, the liquid crystal composition applied directly on the surface Sufficient vertical alignment is given to the liquid crystal molecules contained in.
- liquid crystal composition of the present invention high cleanliness of the colored layer 3 by UV cleaning treatment or surface modification treatment, substrate adhesion, and high optical characteristics due to good alignment of liquid crystal molecules. It is possible to achieve both the functions of the C plate. Furthermore, a color filter 1 having such a positive C plate provided inside the liquid crystal cell by a so-called in-cell type can be obtained.
- the liquid crystal coating film is irradiated with actinic radiation having a photosensitive wavelength such as liquid crystal molecules and a photopolymerization initiator contained in the liquid crystal composition. It can be made to progress.
- the wavelength of the active radiation applied to the liquid crystal coating film is appropriately selected according to the absorption wavelength of the liquid crystal composition.
- the active radiation irradiated in the present invention ultraviolet rays having a wavelength of 200 to 500 nm may be used.
- a high pressure mercury lamp, a xenon lamp, a metal halide lamp, or the like is used.
- the amount of irradiation light may vary depending on the type and composition of the crosslinkable liquid crystal compound and the type and amount of the photopolymerization initiator, for example, about 10 to 3000 mjZcm 2 .
- the active radiation applied to the liquid crystal coating film is not limited to monochromatic light, but may be light having a certain wavelength range including the photosensitive wavelength of the liquid crystal composition.
- the liquid crystal coating film forms the retardation layer 4 and the color filter 1 is manufactured.
- the thickness of the retardation layer 4 is not particularly limited as long as a desired amount of retardation is exhibited. In general, the thickness of the retardation layer 4 is preferably about 0.5 to about LO / z m in consideration of productivity and the like.
- the liquid crystal coating film is used as the retardation layer 4, the liquid crystal coating film is irradiated with actinic radiation to advance the cross-linking polymerization reaction of the liquid crystal molecules, and the liquid crystal coating film is further baked. May be. By performing such a firing step, the retardation layer 4 can be further cured, and the color filter 1 in which the surface of the retardation layer 4 is cured can be obtained.
- the firing step can be performed by placing the substrate that has undergone the crosslinking step in the retardation layer 4 in an oven or the like heated to a certain temperature and heating the substrate.
- the firing step can be performed using a commercially available oven such as Azwan “Hot Air Circulating Oven KLO-60M” in an air atmosphere and at atmospheric pressure.
- the firing temperature and firing time can be appropriately determined depending on the thickness of the substrate including the retardation layer 4, the thickness of the retardation layer 4 itself, the type of the crosslinkable liquid crystal compound used, and the like.
- the firing time is preferably 0.5 hours or more and 2.5 hours or less, and the firing temperature is preferably 200 ° C. or more and 250 ° C. or less.
- the firing time in the firing step exceeds 2.5 hours, yellowing or the like may occur in the substrate, which may reduce the transmittance of the substrate.
- the firing time is less than 0.5 hour, the substrate Adhesiveness, heat resistance, and curing degree of the resin may be low, and sufficient durability may not be obtained.
- a liquid crystal composition is applied onto the transparent substrate 2, and this is aligned and fixed to form the retardation layer 4, thereby forming a so-called in-cell type.
- the retardation layer 4 can be obtained.
- the entire color filter 1 can be made thinner compared to the conventional method in which a retardation film formed into a sheet is attached to the outside of the liquid crystal cell with an adhesive or the like, and light scattering by the adhesive is also possible.
- the retardation layer 4 is protected by the transparent substrate 2, effects such as improvement of heat resistance and suppression of moisture absorption deformation can be obtained.
- the pencil hardness of the retardation layer 4 is preferably 2H or more according to the evaluation standard of JISK5600-5-4. Specifically, the pencil hardness of the phase difference layer 4 is measured by the following test method.
- the sample substrate on which the phase difference layer to be measured for hardness is formed is placed on a lead brush hardness tester with a pencil with a flat tip.
- the pencil hardness tester should be set so that when the tip of the pencil touches the surface of the sample substrate at an angle of 45 ⁇ 1 °, the pencil force is Og. Then, apply a load of 750 ⁇ 10g to the pencil. After the tip of the pencil is placed on the sample substrate, the sample substrate is moved 7 mm at a speed of 0.5 mm to LmmZsec in a direction in which the pencil is inclined 45 ⁇ 1 °.
- the state of the surface portion (test portion) of the sample substrate is inspected with the naked eye to examine the type of indentation on the pencil.
- an indentation of a pencil that is, a case where a scar occurs in the retardation layer
- no indentation occurs. If indentations occur, classify and define them as shown in (a) to (c) below, depending on the situation.
- This pencil hardness test specifies the hardness of a pencil at which a scar having a length of at least 3 mm as an indentation of any one of the above is generated at the test site.
- the pencil hardness test is performed twice. If the results of the two times differ by one unit or more, they are discarded and the test is performed again. In other words, in the first pencil hardness test, when the pencil hardness is 2H, the scar length is 3 mm or more, and in the second pencil hardness test, when the pencil hardness is 5H, Discard the results and test again.
- the color filter 1 of the present invention capable of improving the adhesion strength with the transparent substrate 2 and the colored layer 3 is 0 or 1 according to the evaluation standard of the phase difference layer 4 after the accelerated life test of JISK5600 5-6. That is, it is preferably 1 or less.
- the heating life test shall be performed for 1 hour at 100 ° C and 100% RH using an accelerated life tester EHS-411M manufactured by Tabai.
- a specific peel test is performed as follows. First, an accelerated life test is performed on the sample substrate coated with the retardation layer 4. Next, in an environment where the temperature is 23 ⁇ 2 ° C and the humidity is 50 ⁇ 5%, the phase difference layer 4 is cut six times (cross cut) at intervals of lmm in each direction in the form of an orthogonal lattice. A grid is provided. Next, use a tape with an adhesive strength of 10 ⁇ 1 N per width of 25 mm and width of 25 mm, affix it in a grid shape so that the longitudinal direction of the tape is parallel to either side of the grid, and rub with your fingers. wear. Furthermore, the edge of the tape is picked up, and the state of the lattice after peeling off for 0.5 to 1 second at an angle of about 60 ° with respect to the non-adhesive surface of the tape is evaluated in the following 6 levels.
- Evaluation Criteria 0 The edge of the cut retardation layer is completely smooth, and there is no peeling of any lattice.
- Evaluation criteria 1 Force with a small peeling in the retardation layer at the intersection of cuts The condition where the cross-cut part is affected is less than 5%.
- Evaluation criteria 2 A state in which the phase difference layer is peeled off along the edge of the cut phase difference layer and at Z or the intersection.
- the cross-cut part is clearly affected by more than 5%, but not more than 15%.
- Criterion 3 The phase difference layer is partially or completely peeled along the cut edge, and various partial forces of the Z or cross-cut grating eyes are partially or completely The phase difference layer is peeled off.
- the cross-cut part will be affected by the delamination with a force that clearly exceeds 15% and does not exceed 35%.
- Evaluation criteria 4 The retardation layer is partially or completely peeled along the cut edge, and Z or several eyes are partially or completely peeled off the retardation layer. State. The cross-cut portion is clearly affected by more than 35% but more than 65% There is nothing to do.
- Evaluation Criteria 5 The degree of peeling exceeds the above Evaluation Criteria 4 (including the state in which the entire cross-cut case is peeled off).
- a protective layer 9 and a spacer 10 may be sequentially provided on the surface of the retardation layer 4 as necessary.
- the protective layer 9 is made of a transparent resin material made of an acrylic, amide or ester polymer containing a polyfunctional acrylate, or an acrylic, amide or ester polymer containing a polyfunctional epoxy. It can be formed by applying a transparent resin paint having material strength to the surface of the retardation layer 4 and then drying and curing it. For the curing of the protective layer 9, for example, a method of irradiating with UV light can be employed according to the properties of the transparent resin material.
- Spacer 10 is a photocurable photosensitive coating material having a material strength such as an acrylic, amide or ester polymer containing a polyfunctional acrylate, and is composed of a retardation layer 4, a protective layer 9, Alternatively, it is applied onto the transparent substrate 2 and dried, and then the paint is exposed and cured through a mask pattern corresponding to the position where the spacer 10 is to be formed, and then the uncured portion is removed by etching. Further, it is formed by firing the whole.
- a material strength such as an acrylic, amide or ester polymer containing a polyfunctional acrylate
- the color filter 1 may include another retardation control layer or the like between the transparent substrate 2 and the retardation layer 4 or on the retardation layer 4.
- another phase difference control layer for example, a positive A plate formed by aligning and fixing a liquid crystal material formed so that the optical axis is parallel to the surface of the transparent substrate 2 can be mentioned.
- another functional layer 20 may be provided on the opposite side of the retardation layer 4 across the transparent substrate 2.
- the functional layer 20 include a transparent conductive film that forms an electric field with a driving electrode described later, a phase difference control layer such as the positive or negative C plate or positive A plate, or a polarizing plate. can do.
- the color filter 1 of the present invention includes a display-side substrate of the liquid crystal display device 11 and Can be used.
- a liquid crystal cell 15 is formed by sealing a driving liquid crystal material 14 between the color filter 1 and the driving circuit side substrate 13.
- the color filter 1 is used as the display-side substrate 12 installed on the viewer side (corresponding to the upper side in the figure) of the liquid crystal display device 11.
- the retardation layer 4 provided in the color filter 1 constitutes a positive C plate in which liquid crystal molecules are fixed in a state of being vertically aligned with respect to the transparent substrate 2 as described above.
- the phase difference layer 4 is disposed so as to be sandwiched between the transparent substrate 2 of the color filter 1 and the transparent substrate 31 constituting the driving circuit side substrate 13 and forms a so-called in-cell type.
- the linearly polarizing plate 23 of the display side substrate 12 and the linearly polarizing plate 32 of the driving circuit side substrate 13 are arranged so that their transmission axes are orthogonal to each other. It is arranged.
- the driving circuit side substrate 13 includes a driving circuit 33 on the in-cell side of the transparent substrate 31 (side on which the driving liquid crystal material 14 is sealed), and a liquid crystal driving electrode whose voltage load is controlled thereby. 3 and 4 are provided.
- the display-side substrate 12 includes a transparent conductive film 21, a positive A plate 22, and a linearly polarizing plate 23 on the observer side of the transparent substrate 2 as the functional layer 20.
- composition A having the following composition.
- Composition A was blended with BHT (2,6 di-tert-butyl-4-hydroxytoluene) as a polymerization inhibitor, Irgacure 907 as a polymerization initiator, and dodecanol as an additive.
- Composition A was prepared according to the description in JP-T-2004-524385.
- the weight ratio of each substance in the composition A shown below is the weight ratio of each substance to the total weight of the composition A.
- a glass substrate (Corning Co., 1737 glass) with a size of 100 x 100mm and a thickness of 0.7mm was used as a clean transparent substrate after appropriate cleaning treatment.
- Spin coater (Mikasa Co., Ltd.) 1H—360S), and the liquid crystal composition is spin-coated on a glass substrate. And then dried under reduced pressure.
- UV irradiation device with an ultra-high pressure mercury lamp (trade name TOSCURE 751 manufactured by Harrison Toshiba Lighting Co., Ltd.)
- UV light with a wavelength of 365 nm was irradiated at 20 mWZcm 2 for 10 seconds to crosslink the crosslinkable liquid crystal.
- the obtained retardation layer was measured for the orientation state, hardness, substrate adhesion and transparency of the liquid crystal molecules as follows.
- the alignment state of the liquid crystal molecules constituting the retardation layer was evaluated by measuring the retardation produced when light having a wavelength of 589 nm passed through the retardation layer as follows.
- the phase difference was measured using RETS-1250AV manufactured by Otsuka Electronics.
- the phase difference was assumed to have an X axis and a y axis orthogonal to each other on the surface of the retardation layer, and a z axis perpendicular to the X axis and the y axis. Then, the retardation value of the retardation layer was measured from the direction inclined in the X-axis direction and the direction inclined in the y-axis direction at a specific wavelength.
- the phase difference that occurs in the optical element between the case of measuring in the direction tilted in the X-axis direction and the case of measuring in the direction tilted in the y-axis direction is V. It was measured whether or not the force showed symmetry with reference to.
- phase difference shows symmetry in both the X-axis direction and the y-axis direction, and the phase difference value in the z-axis direction is 4 nm or less.
- the phase difference shows symmetry in both the X-axis direction and the y-axis direction, or the value of the phase difference in the z-axis direction satisfies 4 nm or less.
- phase difference is disturbed in symmetry in both the X-axis direction and the y-axis direction, and the value of the phase difference in the z-axis direction is greater than 4 nm.
- the hardness of the retardation layer formed on the optical element was measured by measuring the pencil hardness according to JIS K5600-5-4.
- the hardness of the retardation layer formed on the obtained optical element was evaluated as follows. The results are shown in Table 1.
- Pencil hardness is equal to or harder than 2H (pencil hardness is 2H or more)... ⁇
- Pencil hardness is softer than that of 2H Harder than or equivalent to that of B ⁇ ⁇ Pencil hardness is softer than that of B X
- the substrate adhesion of the retardation layer formed on the optical element is measured according to JIS K5600-5-6, using the peel strength after an accelerated life test of 1 hour at a temperature of 100 ° C and a humidity of 100%. Carried out. The measured peel strength was evaluated as follows. The results are shown in Table 1.
- Evaluation criteria based on measurement of peel strength is 0 or 1 (ie, 1 or less)
- the transparency of the retardation layer formed on the optical element was evaluated by measuring the haze in the thickness direction of the retardation layer.
- the haze of the retardation layer was measured according to JIS K7136.
- “NDH-2000” manufactured by Nippon Denshoku Industries Co., Ltd. was used as a measuring instrument. The results are shown in Table 1.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that the conversion value of the multifunctional composite compound was 10% by weight. Table 1 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that bisphenol A-glycidyl methacrylate (epoxy ester 3000M manufactured by Kyoeisha) was used as the multifunctional compound. Went. Table 1 shows the evaluation results. [0139] (Example 1 4)
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that pentaerythritol triatalylate (M-305 manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. The evaluation results are shown in Table 1.
- a retardation layer was prepared in the same manner as in Example 1 except that 1% by weight of bis [3- (triethoxysilyl) propyl] disulfide (SIB1824.6 from Gelest) was used as the sulfido-based silane coupling agent. . Table 1 shows the evaluation results.
- a retardation layer was prepared in the same manner as in Example 1-1 except that a colored layer was formed between the glass substrate and the retardation layer using the following colored resist, and the orientation state, hardness, and The substrate adhesion was evaluated. Table 1 shows the evaluation results.
- the colored resist is applied onto the transparent substrate by spin coating, pre-betated at 90 ° C for 3 minutes, alignment exposure (lOOmjZcm 2 ), and then post-bed at 230 ° C for 30 minutes. And a red colored layer having a thickness of 2.0 m was formed. Subsequently, using a product name OC-2506 manufactured by Iwasaki Electric Co., Ltd. as an ultraviolet cleaning device, the colored layer was subjected to ultraviolet cleaning at an energy of 900 mi / cm 2 with ultraviolet light having a wavelength of 254 nm.
- a retardation layer was prepared and evaluated in the same manner as in Example 11 except that the conversion value of the multifunctional compound with respect to the blend was 3.0% by weight. Table 1 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that the conversion value of the multifunctional compound to the compound was 25% by weight. Table 1 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that the conversion value of the alicyclic epoxy compound with respect to the compound was 0.05% by weight. Table 1 shows the evaluation results.
- a retardation layer was produced and evaluated in the same manner as in Example 1-1, except that the equivalent value of the alicyclic epoxy compound was changed to 25% by weight. Table 1 shows the evaluation results.
- Example 11 was repeated except that 20 wt% of ethylene glycol diglycidyl ether (Evolite 40E manufactured by Kyoeisha) was used instead of the alicyclic epoxy compound. A retardation layer was prepared and evaluated. Table 1 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1 except that the polyfunctional compound was not used. Table 1 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1, except that an alicyclic epoxy compound was used. Table 1 shows the evaluation results.
- a colored layer and a retardation layer were prepared in the same manner as in Example 1-7, except that a sulfide-based silane coupling agent was used, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. It was. Table 1 shows the evaluation results.
- Example 1-1 As Example 1-1, except that 20% by weight of trimethylolpropane tritalylate (M-309 manufactured by Toagosei Co., Ltd.) having no alcoholic hydroxyl group in the molecular structure was used as the polyfunctional compound. A retardation layer was prepared and evaluated. Table 1 shows the evaluation results.
- Example 1-1 except that 20% by weight of 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane (KBM-303 manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the sulfido silane coupling agent. In the same manner as above, a retardation layer was prepared and evaluated. Table 1 shows the evaluation results.
- Example 1-7 except that 20% by weight of 2- (3,4 epoxycyclohexyl) ethyltrimethoxysilane (KBM-303, Shin-Etsu Chemical Co., Ltd.) was used in place of the sulfido silane coupling agent.
- KBM-303 2- (3,4 epoxycyclohexyl) ethyltrimethoxysilane
- a colored layer and a retardation layer were prepared in the same manner as described above, and the alignment state, hardness, and substrate adhesion of the retardation layer were evaluated. Table 1 shows the evaluation results.
- Example 2-1 A phase difference was obtained in the same manner as in Example 1-1 except that 3-mercapto-pyrumethyldimethoxysilane (KBM-802, manufactured by Shin-Etsu Chemical Co., Ltd.), which is a mercapto-based silane coupling agent, was used as the silane coupling agent. Layers were prepared and evaluated. Table 2 shows the evaluation results.
- KBM-802 3-mercapto-pyrumethyldimethoxysilane
- a retardation layer was produced and evaluated in the same manner as in Example 2-1, except that the compound-converted value of the multifunctional compound was 10% by weight. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that bisphenol A-glycidyl methacrylate (epoxy ester 3000M manufactured by Kyoeisha) was used as the multifunctional compound. Went. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that pentaerythritol triatalylate (M-305 manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. The evaluation results are shown in Table 2.
- a retardation layer was prepared in the same manner as in Example 2-1, except that 1% by weight of 3-mercaptopropyltrimethoxysilane (Shin-Etsu Chemical Co., Ltd. ⁇ -803) was used as the mercapto-based silane coupling agent. .
- Table 2 shows the evaluation results.
- a retardation layer was produced in the same manner as in Example 2-1, except that a colored layer similar to that in Example 1-7 was formed between the glass substrate and the retardation layer, and the orientation state, hardness, The substrate adhesion was evaluated. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that the converted value of the multifunctional compound was 25% by weight. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that the conversion value of the alicyclic epoxy compound with respect to the compound was 0.05% by weight. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that the conversion value of the alicyclic epoxy compound to the compound was 25% by weight. Table 2 shows the evaluation results.
- Example 2-1 Except for using 20% by weight of hydroquinone diglycidyl ether (Denacol EX-203 manufactured by Nagase ChemteX Corporation), which is an aromatic epoxy compound, instead of the alicyclic epoxy compound, the same procedure as in Example 2-1 was performed. A retardation layer was prepared and evaluated. The evaluation results are shown in Table 1.
- Example 2-1 except that 20% by weight of ethylene glycol diglycidyl ether (Evolite 40E manufactured by Kyoeisha Engineering Co., Ltd.), which is a linear epoxy compound, was used instead of the alicyclic epoxy compound. Then, a retardation layer was prepared and evaluated. Table 2 shows the evaluation results.
- ethylene glycol diglycidyl ether (Evolite 40E manufactured by Kyoeisha Engineering Co., Ltd.), which is a linear epoxy compound, was used instead of the alicyclic epoxy compound.
- Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 1 except that the polyfunctional compound was not used. Table 2 shows the evaluation results. [0175] (Comparative Example 2-2)
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that an alicyclic epoxy compound was used. Table 2 shows the evaluation results.
- a colored layer and a retardation layer were prepared in the same manner as in Example 2-7 except that a mercapto-based silane coupling agent was used, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. It was. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that 20% by weight of trimethylolpropane tritalylate (M-309, manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. Went. Table 2 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 2-1, except that pentaerythritol tetraatalylate (Light Esterate PE-4A manufactured by Kyoeisha Co., Ltd.) was used as the multifunctional compound. Went. Table 2 shows the evaluation results.
- Example 2-1 In the same manner as in Example 2-1, except that 1.0% by weight of 3-glycidoxypropyltrimethoxysilane (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd.) was used instead of the mercapto-based silane coupling agent. A phase difference layer was prepared and evaluated. Table 2 shows the evaluation results.
- KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd.
- Example 2-7 Colored in the same manner as Example 2-7, except that 1.0% by weight of 3-glycidoxypropyltrimethoxysilane (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd.) was used instead of the mercapto-based silane coupling agent.
- KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd.
- a layer and a retardation layer were prepared, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. Table 2 shows the evaluation results.
- N-2 (aminoethinore) 3-aminopropylmethyldimethoxysilane (KBM-602 manufactured by Shin-Etsu Chemical Co., Ltd.), which is an amino silane coupling agent, is 0.01% by weight in terms of the compound combination.
- a retardation layer was prepared and evaluated in the same manner as in Example 1-1 except that it was used. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that the conversion value of the polyfunctional compound was 10% by weight. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that bisphenol A-glycidyl methacrylate (epoxy ester 3000M manufactured by Kyoeisha) was used as the multifunctional compound. Went. Table 3 shows the evaluation results.
- Example 1 except that 0.01% by weight of 3-triethoxysilyl mono- (1,3-dimethyl-butylidene) propylamine (Shin-Etsu Chemical Co., Ltd. 9103) was used as an amino-based silane coupling agent.
- a retardation layer was produced in the same manner as in 3-1. Table 3 shows the evaluation results.
- Example 3-1 except that 0.01% by weight of ⁇ -2 (aminoethyl) 3-aminopropyltrimethoxysilane (Shin-Etsu Chemical Co., Ltd. ⁇ -603) was used as an amino-based silane coupling agent A retardation layer was produced in the same manner. Table 3 shows the evaluation results.
- a retardation layer was formed in the same manner as in Example 3-1, except that 0.01% by weight of 3-aminopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., 903) was used as the amino silane coupling agent. Produced. Table 3 shows the evaluation results.
- a retardation layer was produced in the same manner as in Example 3-1, except that the same colored layer as in Example 1-7 was formed between the glass substrate and the retardation layer, and the orientation state, hardness, The substrate adhesion was evaluated. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that the converted value of the multifunctional compound was 25% by weight. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that the conversion value of the alicyclic epoxy compound with respect to the compound was 0.05% by weight. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that the conversion value of the alicyclic epoxy compound was 25% by weight. Table 3 shows the evaluation results.
- Example 3-1 Except for using 20% by weight of hydroquinone diglycidyl ether (Denacol EX-203 manufactured by Nagase ChemteX Corporation), which is an aromatic epoxy compound, instead of the alicyclic epoxy compound, the same procedure as in Example 3-1 was performed. A retardation layer was prepared and evaluated. The evaluation results are shown in Table 3.
- Example 3-1 except that 20% by weight of ethylene glycol diglycidyl ether (Evolite 40E manufactured by Kyoeisha Engineering Co., Ltd.), which is a linear epoxy compound, was used in place of the alicyclic epoxy compound. Then, a retardation layer was prepared and evaluated. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that the polyfunctional compound was not used. Table 3 shows the evaluation results. [0200] (Comparative Example 3-2)
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that an alicyclic epoxy compound was used. Table 3 shows the evaluation results.
- a colored layer and a retardation layer were prepared in the same manner as in Example 3-7 except that an amino-based silane coupling agent was used, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. Went. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that 20% by weight of trimethylolpropane tritalylate (M-309, manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. Went. Table 3 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 3-1, except that pentaerythritol tetraatalylate (Kyoeisha Co., Ltd. Light Atarilate PE-4A) was used as the multifunctional compound. Went. Table 3 shows the evaluation results.
- a phase difference was obtained in the same manner as in Example 3-1, except that 10.0% by weight of 3-chloropropyl methoxytrimethoxysilane (KBM-703 manufactured by Shin-Etsu Chemical Co., Ltd.) was used instead of the amino silane coupling agent. Layers were prepared and evaluated. Table 3 shows the evaluation results.
- Example 3-7 Colored layer in the same manner as in Example 3-7, except that 10.0% by weight of 3-chloropropyl methoxytrimethoxysilane (KBM-703 manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the amino silane coupling agent.
- KBM-703 manufactured by Shin-Etsu Chemical Co., Ltd.
- a retardation layer was prepared, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. Table 3 shows the evaluation results.
- a retardation layer was produced and evaluated in the same manner as in Example 3-1, except that no silane coupling agent was used. Table 3 shows the evaluation results.
- Example 3 Orientation Hardness Substrate Adhesion Haze Example 3 1 ⁇ ⁇ ⁇ 0.8 Example 3-2 ⁇ ⁇ ⁇ 1.1 Example 3-3 ⁇ ⁇ ⁇ 0.8 Example 3-4 ⁇ ⁇ 0 8 Example 3 5 ⁇ ⁇ ⁇ 0.8 Example 3-6 ⁇ ⁇ ⁇ 0.5 Example 3 7 ⁇ ⁇ ⁇ 0.8 Example 3-8 ⁇ 1.5 Example 3-9 ⁇ ⁇ ⁇ 0.0 8 Example 3 1 0 ⁇ @
- Comparative example 3-4 X X 1.3 Comparative example 3-5 X X 0.8 0.8 Comparative example 3-6 X ⁇ ⁇ 3.1 Comparative example 3-7 X ⁇ ⁇
- Example 1-1 As Example 1-1, except that 3-methacryloxypropylmethyl jetoxysilane (KBE-502, manufactured by Shin-Etsu Chemical Co., Ltd.), which is a (meth) atalyloyl silane coupling agent, was used as the silane coupling agent. Similarly, a retardation layer was produced and evaluated. The evaluation results are shown in Table 4.
- a retardation layer was prepared and evaluated in the same manner as in Example 41 except that the equivalent value of the alcoholic polyfunctional molecule was changed to 10% by weight. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that bisphenol A-glycidyl methacrylate (epoxy ester 3000M manufactured by Kyoeisha) was used as the multifunctional compound. Went. Table 4 shows the evaluation results. [0211] (Example 4 4)
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that pentaerythritol triatalylate (M-305 manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. Table 4 shows the evaluation results.
- Retardation was carried out in the same manner as in Example 4-1, except that 1% by weight of 3-methacryloxypropyltriethoxysilane (Shin-Etsu Chemical Co., Ltd. ⁇ -503) was used as the (meth) atallyloyl silane coupling agent. A layer was made. Table 4 shows the evaluation results.
- a retardation layer was produced in the same manner as in Example 4-1, except that a colored layer similar to that in Example 1-7 was formed between the glass substrate and the retardation layer, and the orientation state, hardness, The substrate adhesion was evaluated. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 41 except that the conversion value of the multifunctional compound with respect to the blend was 3.0% by weight. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that the converted value of the multifunctional compound was 25% by weight. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that the conversion value of the alicyclic epoxy compound with respect to the compound was 0.05% by weight. Table 4 shows the evaluation results.
- Example 4-1 Except that the alicyclic epoxy compound compound-converted value was 25% by weight, Example 4-1 and Similarly, a retardation layer was produced and evaluated. Table 4 shows the evaluation results.
- Example 41 was used except that 20 wt% of ethylene glycol diglycidyl ether (Evolite 40E manufactured by Kyoeisha) was used instead of the alicyclic epoxy compound. A retardation layer was prepared and evaluated. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that the polyfunctional compound was not used. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that an alicyclic epoxy compound was used. Table 4 shows the evaluation results.
- a colored layer and a retardation layer were prepared in the same manner as in Example 4-7, except that a (meth) atalyloyl silane coupling agent was used, and the orientation state, hardness, and substrate adhesion of the retardation layer were prepared. Was evaluated. Table 4 shows the evaluation results.
- a retardation layer was prepared and evaluated in the same manner as in Example 4-1, except that 20% by weight of trimethylolpropane tritalylate (M-309, manufactured by Toagosei Co., Ltd.) was used as the polyfunctional compound. The went. Table 1 shows the evaluation results.
- a retardation layer was prepared in the same manner as in Example 4-1, except that pentaerythritol tetraatalylate (Kyoeisha Co., Ltd., Light Atarylate PE-4A) was used as the multifunctional compound.
- Retardation layer in the same manner as in Example 4-1, except that butyl trimethoxysilane (KBM-1003 manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the (meth) atallyloyl silane coupling agent. Were prepared and evaluated. Table 4 shows the evaluation results.
- a colored layer and a layer were formed in the same manner as in Example 47 except that butyl trimethoxysilane (KBM-1003 manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the (meth) atarylloyl-based silane coupling agent.
- KBM-1003 manufactured by Shin-Etsu Chemical Co., Ltd.
- a retardation layer was prepared, and the orientation state, hardness, and substrate adhesion of the retardation layer were evaluated. Table 4 shows the evaluation results.
- the retardation layer obtained from the liquid crystal composition according to each example of the present invention satisfactorily maintains the vertical alignment of the liquid crystal molecules contained therein. It can be seen that both hardness, base material adhesion and transparency can be improved. On the other hand, in the comparative example, the vertical alignment property of the liquid crystal molecules, the hardness of the retardation layer, the substrate adhesion or the transparency was poor.
- the addition of a sulfido, mercapto, amino, or (meth) attalyloyl silane coupling agent to the liquid crystal composition of the present invention improves the vertical alignment of the liquid crystal molecules, and the alcoholic polyfunctionality. It is understood that the hardness and the substrate adhesion of the retardation layer are synergistically improved by adding both the ionic compound and the alicyclic epoxy compound.
- Example 3 comprising a retardation layer formed using a liquid crystal composition containing a ketimine-based silane coupling agent was also used.
- Haze is generally understood as an index indicating the transparency of a retardation layer. Only haze Although it is not an index for determining the performance of a color filter, a display device using a color filter having a low haze and a retardation layer can obtain a high contrast ratio and a viewing angle improvement effect, and can produce a high-quality image. Can be provided.
- Example 3-6 and Example 3-9 the haze value was higher than that in Comparative Example 3-8, and Comparative Example 1-6 2-6, 3-6, and 4-6, it was suggested that the presence of the silane coupling agent in the liquid crystal composition increased haze.
- the color filter of the present invention uses a liquid crystal composition to which a silane coupling agent other than the silane coupling agent specified in the present invention is added. It was suggested that there is an effect of suppressing the haze lower than that of the color filter having the retardation layer formed.
- Examples 3-6 and Example 3 containing a ketimine silane coupling agent were added.
- the present invention achieves the intended purpose of improving the adhesion of the retardation layer to the substrate surface.
- the intended purpose of the present invention is particularly favorably achieved from the viewpoint of solving the above-mentioned problem of improving adhesion and suppressing haze to a low value. It can be achieved and desirable.
- the crosslinkable liquid crystal composition of the present invention can form a retardation layer exhibiting a good homeotropic orientation on the underlayer without the presence of a vertical alignment film. Therefore, for example, in a display device such as a liquid crystal display device, it is possible to reduce light scattering by reducing the thickness of the liquid crystal cell, and at the same time, providing a high-quality image display.
Abstract
Description
Claims
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US12/085,655 US7799391B2 (en) | 2006-06-15 | 2007-06-15 | Liquid crystal composition, color filter and liquid crystal display |
JP2008521281A JPWO2007145339A1 (ja) | 2006-06-15 | 2007-06-15 | 液晶組成物、カラーフィルタおよび液晶表示装置 |
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JP2006-166438 | 2006-06-15 | ||
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JP2019065230A (ja) * | 2017-10-04 | 2019-04-25 | Jnc株式会社 | 液晶媒体及び液晶表示素子の製造方法 |
TWI733845B (zh) * | 2016-07-01 | 2021-07-21 | 日商富士軟片股份有限公司 | 影像感測器用彩色濾光片、影像感測器及影像感測器用彩色濾光片的製造方法 |
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TWI491303B (zh) * | 2009-06-29 | 2015-07-01 | 群創光電股份有限公司 | 影像顯示系統 |
JP5827161B2 (ja) | 2012-03-28 | 2015-12-02 | 富士フイルム株式会社 | コレステリック液晶性混合物、フィルム、赤外反射板、積層体および合わせガラス |
WO2014042389A1 (ko) * | 2012-09-17 | 2014-03-20 | 전북대학교산학협력단 | 액정 수직배향 유도제 및 이를 이용하여 제조된 액정표시장치 |
KR101976215B1 (ko) * | 2012-09-17 | 2019-05-07 | 전북대학교산학협력단 | 액정 수직배향 유도제 및 이를 이용하여 제조된 액정표시장치 |
WO2016006738A1 (ko) * | 2014-07-10 | 2016-01-14 | 전북대학교산학협력단 | 액정 수직배향 유도제 및 이를 이용하여 제조된 액정 표시장치 |
CN105001878B (zh) * | 2015-07-31 | 2017-08-29 | 江苏和成新材料有限公司 | 一种可聚合手性液晶组合物及其应用 |
CN111373018B (zh) | 2017-12-22 | 2023-08-08 | 株式会社Lg化学 | 液晶组合物及其用途 |
CN112285977B (zh) * | 2020-12-28 | 2021-03-02 | 北京瑞波科技术有限公司 | 一种位相延迟装置及其制备方法、显示设备 |
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JP2003306491A (ja) * | 2002-04-18 | 2003-10-28 | Fuji Photo Film Co Ltd | 光学活性イソソルビド誘導体及びその製造方法、光反応型キラル剤、液晶組成物、液晶カラーフィルター、光学フィルム及び記録媒体、並びに液晶の螺旋構造を変化させる方法、液晶の螺旋構造を固定化する方法 |
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JP7056061B2 (ja) | 2017-10-04 | 2022-04-19 | Jnc株式会社 | 液晶媒体及び液晶表示素子の製造方法 |
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