WO2017003268A1 - Composition de cristaux liquides de type invité-hôte - Google Patents

Composition de cristaux liquides de type invité-hôte Download PDF

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WO2017003268A1
WO2017003268A1 PCT/KR2016/007194 KR2016007194W WO2017003268A1 WO 2017003268 A1 WO2017003268 A1 WO 2017003268A1 KR 2016007194 W KR2016007194 W KR 2016007194W WO 2017003268 A1 WO2017003268 A1 WO 2017003268A1
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Prior art keywords
liquid crystal
group
polarizing element
dye
crystal composition
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PCT/KR2016/007194
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English (en)
Korean (ko)
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이지연
김신영
박문수
이대희
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주식회사 엘지화학
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Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2017506996A priority Critical patent/JP6500286B2/ja
Priority to CN201680002662.XA priority patent/CN106715649B/zh
Priority to US15/504,972 priority patent/US10495797B2/en
Priority claimed from KR1020160084188A external-priority patent/KR102118367B1/ko
Publication of WO2017003268A1 publication Critical patent/WO2017003268A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/60—Pleochroic dyes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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

Definitions

  • the present application relates to the use of a guest host type liquid crystal composition, a polarizing element and a polarizing element.
  • the polarizing element used in the display device may be, for example, a polyvinyl alcohol (PVA) film in which iodine is salted and a protective film for protecting the same, for example, a triacetylcellulose (TAC) film. It is formed in a composite film structure.
  • PVA polyvinyl alcohol
  • TAC triacetylcellulose
  • a coated polarizing element using a dichroic dye has a poor heat resistance and therefore, a dye at a high temperature condition.
  • the absorption spectrum is changed due to the decomposition of molecules, which limits its use in display devices. Accordingly, in the field of display devices, research on the development of a coating type polarizing device capable of securing heat resistance has been increasing.
  • the present application provides the use of a guest host type liquid crystal composition, a polarizer and a polarizer.
  • the present application relates to a guest host type liquid crystal composition.
  • An exemplary guest host type liquid crystal composition may include a polymerizable liquid crystal compound and a dichroic dye that do not include an acryloyl based polymerizable functional group.
  • the guest host type liquid crystal composition may mean, for example, a liquid crystal composition having a characteristic capable of forming a polarizing element exhibiting an anisotropic light absorption effect.
  • the guest-host type liquid crystal composition is, for example, as described later, dichroic dyes are arranged together in accordance with the arrangement of the polymerizable liquid crystal compound to absorb light parallel to the alignment direction of the dye and transmit the vertical light, The polarizing element which shows an isotropic light absorption effect can be formed.
  • the liquid crystal composition of the present application may exhibit excellent heat resistance even after polymerization to the liquid crystal layer.
  • the liquid crystal composition may satisfy Equation 1 below.
  • W may mean the maximum absorption wavelength of the dye immediately after the polymerizable liquid crystal compound is polymerized
  • H is the dye of the dye after maintaining the liquid crystal composition polymerized with the liquid crystal compound at 100 ° C for 100 hours It may mean the maximum absorption wavelength. That is, in the liquid crystal composition, the absolute value of the maximum absorption wavelength change rate of the dye under the high temperature condition calculated by Equation 1 may be 20 or less.
  • the maximum absorption wavelength change rate of the dye calculated by Equation 1 may be, more specifically, within a range of ⁇ 17.5, a range of ⁇ 15, a range of ⁇ 12.5, or a range of ⁇ 10.
  • the rate of change of the maximum absorption wavelength of the dye can be calculated by measuring the absorption spectrum of the dye layer described in the Examples described later.
  • the "polymerizable liquid crystal compound” may mean a compound including a site capable of exhibiting liquid crystallinity, for example, a mesogen skeleton, and the like, and including one or more polymerizable functional groups.
  • the liquid crystal composition of the present application may include a polymerizable liquid crystal compound that does not include an acryloyl series polymerizable functional group as the polymerizable functional group.
  • the acryloyl-based polymerizable functional group may be, for example, a meaning representing a functional group polymerizable by a radical reaction, and for example, may include acryloyl group or methacryloyl group.
  • the liquid crystal composition of the present application may include, as a main component, a polymerizable liquid crystal compound that does not contain an acryloyl based polymerizable functional group.
  • a polymerizable liquid crystal compound that does not contain an acryloyl based polymerizable functional group.
  • the term “main ingredient” means that at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, or at least about 95% by weight of the composition is included in the composition. can do.
  • a cationically polymerizable liquid crystal compound As a polymerizable liquid crystal compound which does not contain an acryloyl type polymerizable functional group, a cationically polymerizable liquid crystal compound can be used, for example.
  • the cationic polymerizable liquid crystal compound may mean, for example, a liquid crystal compound having at least one or more functional groups polymerizable by a cationic polymerization reaction.
  • an epoxy group can be illustrated, for example.
  • the cationically polymerizable liquid crystal compound is, for example, a monofunctional polymerizable liquid crystal compound containing one epoxy group or two or more epoxy groups, for example, 2 to 10, 2 to 8, 2 It may be a multi-functional polymerizable liquid crystal compound containing 6 to 6, 2 to 5, 2 to 4, 2 to 3 or two.
  • the compound represented by following formula (1) can be used, for example.
  • A is a single bond, -COO- or -OCO-
  • R 1 to R 10 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, nitro group, epoxy group, cyano group,- OQP or a substituent of Formula 2, wherein at least one of R 1 to R 10 is an epoxy group, a cyano group, -OQP or a substituent of Formula 2, or two adjacent substituents of R 1 to R 5 or R 6 to R 10 Two adjacent substituents are connected to each other to form a benzene substituted with -OQP, wherein Q is an alkylene group or an alkylidene group, and P is an epoxy group:
  • B is a single bond, -COO-, or -OCO-
  • R 11 To R 15 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, nitro group, epoxy group, cyano group or -OQP, wherein at least one of R 11 to R 15 is an epoxy group, cyano group, or -OQP Or R 11 Two adjacent substituents of R to R 15 are connected to each other to form a benzene substituted with —OQP, wherein Q is an alkylene group or an alkylidene group, and P is an epoxy group.
  • adjacent two substituents may be linked to each other to form benzene substituted with -OQP, which may mean that two adjacent substituents are connected to each other to form a naphthalene skeleton substituted with -OQP as a whole. have.
  • single bond refers to a case in which a separate atom is not present in a portion represented by A or B.
  • A is a single bond in Formula 1
  • benzene on both sides of A may be directly connected to form a biphenyl structure.
  • alkyl group is a straight or branched chain alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, or 3 to 20 carbon atoms, It may mean a cycloalkyl group having 3 to 16 carbon atoms or 4 to 12 carbon atoms.
  • the alkyl group may be optionally substituted with one or more substituents.
  • alkoxy group may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
  • the alkoxy group may be linear, branched or cyclic.
  • the alkoxy group may be optionally substituted with one or more substituents.
  • alkylene group or alkylidene group may mean an alkylene group or an alkylidene group having 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified.
  • the alkylene group or alkylidene group may be linear, branched or cyclic.
  • the alkylene group or alkylidene group may be optionally substituted with one or more substituents.
  • an alkenyl group in the present specification may mean an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified.
  • the alkenyl group may be linear, branched or cyclic.
  • the alkenyl group may be optionally substituted with one or more substituents.
  • an alkyl group, an alkoxy group, an alkenyl group, an oxo group, an oxetanyl group, a thiol group, an epoxy group, or a cyano group, etc. can be illustrated, Preferably it is substituted by an epoxy group It is good to be
  • the liquid crystal composition may also include a dichroic dye as described above.
  • the dye may refer to a material capable of intensively absorbing and / or modifying light in at least part or the entire range, for example, in the visible light region, for example, in the 400 nm to 700 nm wavelength range
  • Dichroic dye may refer to a material capable of anisotropic absorption of light in at least part or the entire range of the visible light region.
  • the dichroic dye for example, a known dye known to be capable of forming a so-called guest host type liquid crystal device, for example, a known dye known to have a property that can be oriented according to the orientation of the polymerizable liquid crystal compound is selected. Can be used.
  • Such dichroic dyes may also be used, for example, dyes having a maximum absorbance in the visible region, for example 400 nm to 700 nm.
  • Such dyes may include, but are not limited to, for example, one or more dyes of cyan dye, anthraquinone dye, acridine dye, cyanine dye, and naphthalene dye.
  • a dichroic ratio that is, a value obtained by dividing the absorption of polarization parallel to the long axis direction of the anisotropic dye by the absorption of polarization parallel to the direction perpendicular to the long axis direction is 5 or more, 6 or more, Dye which is 7 or more, 8 or more, 9 or more, or 10 or more can be used.
  • the dye may satisfy the dichroic ratio at at least some of the wavelengths or at any one within the wavelength range of the visible region, for example, in the wavelength range of about 380 nm to 700 nm or about 400 nm to 700 nm.
  • the upper limit of the dichroic ratio may be, for example, about 20 or less, 18 or less, 16 or less, or about 14 or less.
  • the content of the dichroic dye in the liquid crystal composition may be appropriately selected within a range that does not impair the desired physical properties.
  • the dichroic dye may be included in a ratio within the range of 0.1 parts by weight to 20 parts by weight with respect to 100 parts by weight of the polymerizable liquid crystal compound.
  • the dichroic dye is 0.1 part by weight, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, or more, based on 100 parts by weight of the polymerizable compound, It may be included in the range of 7 parts by weight or more, 8 parts by weight, 9 parts by weight or 10 parts by weight or more, and 20 parts by weight or less, 19 parts by weight or less, 18 parts by weight or less, relative to 100 parts by weight of the polymerizable compound. It may be included in the range of up to 16 parts by weight, up to 15 parts by weight, up to 14 parts by weight, up to 13 parts by weight, up to 12 parts by weight or up to 11 parts by weight.
  • the liquid crystal composition may further include a cationic initiator when the cationic polymerizable liquid crystal compound is included as the polymerizable liquid crystal compound.
  • cation initiators include ionization cation initiators of onium salts or organometallic salts, or nonionization cation initiators such as organic silanes or latent sulfonic acid series or other non-ionizing compounds. Can be used.
  • onium salt-based initiator include a diaryliodonium salt, a triarylsulfonium salt, an aryldiazonium salt, and the like. As the zero, iron arene and the like can be exemplified.
  • organosilane-based initiator examples include o-nitrobenzyl triaryl silyl ether and triaryl silyl peroxide.
  • an acyl silane (acyl silane) may be exemplified
  • a latent sulfuric acid-based initiator may be exemplified by a-sulfonyloxy ketone or a-hydroxymethylbenzoin sulfonate, but is not limited thereto.
  • a mixture of an iodine-based initiator and a photosensitizer may be used as the cationic initiator.
  • photosensitizers include anthracene compounds, pyrene compounds, carbonyl compounds, organic sulfur compounds, persulfides, redox compounds, azo and diazo compounds, halogen compounds or photoreducing dyes.
  • the content of the cationic initiator may be appropriately adjusted according to the degree of polymerization desired, for example, it may be included in a ratio within the range of 0.1 parts by weight to 20 parts by weight of 100 parts by weight of the cationic polymerizable liquid crystal compound.
  • the ionic initiator is 0.1 part by weight, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight or more, based on 100 parts by weight of the polymerizable compound, It may be included in the range of 7 parts by weight or more, 8 parts by weight, 9 parts by weight or 10 parts by weight or more, and 20 parts by weight or less, 19 parts by weight or less, 18 parts by weight or less, relative to 100 parts by weight of the polymerizable compound. It may be included in the range of up to 16 parts by weight, up to 15 parts by weight, up to 14 parts by weight, up to 13 parts by weight, up to 12 parts by weight or up to 11 parts by weight.
  • the present application also relates to a polarizing element.
  • the polarizing element may include, for example, the polymer layer of the guest host liquid crystal composition described above. That is, a polarizing element can contain the polymeric layer of the host guest type liquid crystal composition containing the polymeric liquid crystal compound and dichroic dye which do not contain an acryloyl type polymeric functional group. Therefore, the content of the polymerizable liquid crystal compound and the dichroic dye in the polarizing device may be the same as described in the item of the liquid crystal composition.
  • Such a polarizing element may exhibit excellent heat resistance.
  • the polarizer may satisfy Equation 1 below. Details of the following Equation 1 may also be applied in the same manner described in the item of the liquid crystal composition.
  • Equation 1 W is the maximum absorption wavelength of the dye immediately after the polymerizable liquid crystal compound is polymerized, and H is the maximum absorption wavelength of the dye after holding the liquid crystal composition polymerized with the liquid crystal compound at 100 ° C. for 100 hours.
  • the polymerization layer may be, for example, a coating layer of a polarizing material including a polymerizable liquid crystal compound and a dichroic dye that do not include an acryloyl based polymerizable functional group.
  • the polymerizable liquid crystal compound may be, for example, a cationic polymerizable liquid crystal compound, more specifically, a liquid crystal compound having a cationically polymerizable functional group such as an epoxy group.
  • Such a polarizing device may be manufactured by, for example, a simple coating process, so that the polarizing device may be manufactured at low cost, and thinning of the device may be achieved through a simplified structure.
  • the thickness of the polymerization layer may be appropriately selected depending on the intended use of the polarizing element, and for example, 0.5 ⁇ m to 10 ⁇ m, 1 ⁇ m to 9 ⁇ m, 2 ⁇ m to 8 ⁇ m, 3 ⁇ m to 7 ⁇ m or 4 ⁇ m It may have a thickness of 6 ⁇ m, but is not limited thereto.
  • the polymerization layer may include, for example, a polymerizable liquid crystal compound in a polymerized state.
  • that the polymerizable liquid crystal compound is included in a polymerized state may mean a state in which the liquid crystal compound is polymerized to form a skeleton such as a main chain or a side chain of the liquid crystal polymer in the layer.
  • the polymerization layer may also contain a polymerizable liquid crystal compound in a horizontally aligned state.
  • the horizontal alignment indicates that the optical axis of the polymerized layer including the polymerized liquid crystal compound is about 0 degrees to about 25 degrees, about 0 degrees to about 15 degrees, about 0 degrees to about 10 degrees, about the plane of the polymerized layer.
  • the optical axis may mean, for example, a fast axis or a slow axis when incident light passes through the corresponding area.
  • the dichroic dye may also be included in the polymerized layer in a state oriented along the alignment direction of the polymerizable liquid crystal compound.
  • the polarizer may further include an alignment layer, and the alignment layer may be disposed adjacent to the polymerization layer.
  • FIG. 1 exemplarily shows a polarizing element including a polymerized layer 101 and an alignment layer 102 adjacent to the polymerized layer.
  • an oriented film if it has an orientation capability with respect to the liquid crystal compound and / or dichroic dye in an adjacent polymer layer, it can select and use without a restriction
  • the alignment layer may be, for example, a photoalignment layer, and the photoalignment layer may include a photoalignment compound.
  • the term photo-orientation compound may refer to a compound which is aligned in a predetermined direction through irradiation of light and orientates adjacent liquid crystal compounds and the like in the alignment direction in a predetermined direction.
  • the alignment compound may be a monomolecular compound, a monomeric compound, an oligomeric compound, or a high molecular compound.
  • the photoalignable compound may be a compound including a photosensitive moiety.
  • Various photo-alignment compounds that can be used for the alignment of the liquid crystal compound are known.
  • Photo-alignment compounds include, for example, compounds aligned by trans-cis photoisomerization; Compounds aligned by photo-destruction, such as chain scission or photo-oxidation; Compounds ordered by photocrosslinking or photopolymerization such as [2 + 2] addition cyclization ([2 + 2] cycloaddition), [4 + 4] addition cyclization or photodimerization; Compounds aligned by photo-Fries rearrangement or compounds aligned by ring opening / closure reaction may be used.
  • azo compounds or stilbenes such as sulfated diazo dyes or azo polymers
  • cyclobutane tetracarboxylic dianhydride cyclobutane-1,2,3,4-tetracarboxylic dianhydride
  • aromatic polysilane or polyester polystyrene or polyimide and the like
  • polystyrene or polyimide and the like can be exemplified.
  • a compound aligned by photocrosslinking or photopolymerization a cinnamate compound, a coumarin compound, a cinnanam compound, a tetrahydrophthalimide compound, a maleimide compound , Benzophenone compounds, diphenylacetylene compounds, compounds having chalconyl residues (hereinafter referred to as chalconyl compounds) or compounds having anthracenyl residues (hereinafter referred to as anthracenyl compounds) as photosensitive residues;
  • chalconyl compounds compounds having chalconyl residues
  • anthracenyl compounds compounds having anthracenyl residues
  • examples of the compounds aligned by the optical freeze rearrangement include aromatic compounds such as benzoate compounds, benzoamide compounds, and methacrylamidoaryl methacrylate compounds.
  • the compound aligned by the ring-opening / ring-closure reaction such as a spiropyran compound A [4 + 2] ⁇ electron system ([4 + 2] ⁇ electronic system), but may be exemplified by compounds such as sorting by a ring opening / ring-closure reaction of, without being limited thereto.
  • the photo-alignment compound may be a monomolecular compound, a monomeric compound, an oligomeric compound, or a high molecular compound, or may be in the form of a blend of the photo-alignment compound and the polymer.
  • the oligomeric or polymeric compound as described above may have a residue derived from the above-described photoalignable compound or a photosensitive residue described above in the main chain or in the side chain.
  • Polymers having residues or photosensitive residues derived from photo-alignment compounds or that can be mixed with the photo-alignment compounds include polynorbornene, polyolefins, polyarylates, polyacrylates, poly (meth) acrylates, poly Examples include mead, poly (amic acid), polymaleimide, polyacrylamide, polymethacrylamide, polyvinyl ether, polyvinyl ester, polystyrene, polysiloxane, polyacrylonitrile or polymethacrylonitrile It may be, but is not limited thereto.
  • Polymers that may be included in the oriented compound include, for example, polynorbornene cinnamate, polynorbornene alkoxy cinnamate, polynorbornene allylyloxy cinnamate, polynorbornene fluorinated cinnamate, polynorbornene chlorinated cinnamate or Polynorbornene discinnamate and the like can be exemplified, but is not limited thereto.
  • the polarizing element may further include a base layer, and the base layer may be formed on one surface of the polymerization layer, for example.
  • 2 exemplarily illustrates a polarizer including a polymer layer 101 and a base layer 201 formed on one surface of the polymer layer.
  • the polarizing element further includes both the base layer and the alignment layer, as shown in FIG. 3, the base layer 201, the alignment layer 102, and the polymerization layer 101 may be sequentially included.
  • a base material layer a well-known raw material can be used without a restriction
  • inorganic films, plastic films, etc. such as a glass film, a crystalline or amorphous silicon film, a quartz, or an Indium Tin Oxide (ITO) film, can be used.
  • an optically anisotropic base material layer such as an optically isotropic base material layer or a retardation layer can be used.
  • plastic substrate layer examples include triacetyl cellulose (TAC); COP (cyclo olefin copolymer) such as norbornene derivatives; Poly (methyl methacrylate); PC (polycarbonate); PE (polyethylene); PP (polypropylene); PVA (polyvinyl alcohol); DAC (diacetyl cellulose); Pac (Polyacrylate); PES (poly ether sulfone); PEEK (polyetheretherketon PPS (polyphenylsulfone), PEI (polyetherimide); PEN (polyethylenemaphthatlate); PET (polyethyleneterephtalate); PI (polyimide); PSF (polysulfone); PAR (polyarylate) or amorphous fluorine resin
  • the substrate layer may include a coating layer of a silicon compound such as gold, silver, silicon dioxide or silicon monoxide, or a coating layer such as an antireflection layer, if necessary.
  • This application also relates to a manufacturing method of a polarizing element.
  • the manufacturing method of the polarizing element may include, for example, polymerizing the above-described liquid crystal composition coated on one surface of the substrate layer.
  • the base layer and the liquid crystal composition in the manufacturing method the contents described in the items of the liquid crystal composition and the polarizing element may be equally applied.
  • the coating method of the liquid crystal composition on the substrate layer is not particularly limited, and known coating methods such as roll coating, printing, inkjet coating, slit nozzle method, bar coating, comma coating, spin coating or gravure coating, for example. By coating through.
  • the polymerization method of the liquid crystal composition is not particularly limited and may be carried out by a known liquid crystal compound polymerization method.
  • the polymerizable liquid crystal compound is a liquid crystal composition having a cationically polymerizable functional group
  • it may be polymerized by a known cation polymerization reaction.
  • it may be carried out by maintaining a suitable temperature or irradiating a suitable active energy ray so that the cationic polymerization reaction can be initiated. If the maintenance at the appropriate temperature and the irradiation of the active energy ray is required at the same time, the process can be carried out sequentially or simultaneously.
  • the irradiation of the active energy ray may be performed using, for example, a high pressure mercury lamp, an electrodeless lamp or a xenon lamp, and the like, and the conditions such as the wavelength, light intensity, or light quantity of the active energy ray to be irradiated are
  • the polymerization of the cationic polymerizable liquid crystal compound can be selected in a range that can be appropriately made.
  • polarizing element a liquid crystal display device, an organic electroluminescence (EL) display device, an inorganic EL display device, a field emission display device (FED), a surface field emission display device (SPED), an electronic paper Display device using (electronic ink or electrophoretic element), plasma display device, projection display device (for example, display having a diffraction light valve (GLV) display device, digital micro mirror device (Digital Light Processing)) Device] and a piezoelectric ceramic display device, but are not limited thereto.
  • a display device a liquid crystal display device, an organic electroluminescence (EL) display device, an inorganic EL display device, a field emission display device (FED), a surface field emission display device (SPED), an electronic paper Display device using (electronic ink or electrophoretic element), plasma display device, projection display device (for example, display having a diffraction light valve (GLV) display device, digital micro mirror device (Digital Light Processing)) Device] and a piezoelectric ceramic display device
  • the liquid crystal display may be, for example, a transmissive liquid crystal display, a transflective liquid crystal display, a reflective liquid crystal display, a direct view liquid crystal display, or a projection liquid crystal display.
  • a display device may be a display device for displaying a two-dimensional image or a stereoscopic display device for displaying a three-dimensional image.
  • the method of configuring such a display device is not particularly limited, and a conventional method may be applied as long as the polarizer is used.
  • the guest-host liquid crystal composition of the present application can manufacture a polarizing element by a simple coating process, thereby reducing manufacturing cost and making it possible to reduce the weight of the polarizing element, and excellent heat resistance without changing the transmission spectrum in the absorption spectrum even under severe conditions such as a high temperature environment.
  • the polarizing element which shows stability can be manufactured.
  • Such a polarizing element can be applied to various display devices such as a liquid crystal display device, an EL display device, a field emission display device, a display device using electronic paper, a projection display device, or a piezoelectric ceramic display device.
  • 1 to 3 are schematic diagrams of exemplary polarizing elements.
  • the composition for forming a photo-alignment film was coated so that the thickness after drying was about 200 mm 3, and dried in an oven at 80 ° C. for 2 minutes.
  • the composition for forming the photo-alignment film 2 parts by weight of poly (5-norbornene-2-methyl (4-methoxy cinnamate)), 1 part by weight of dipentaerythritol hexaacrylate as a polar binder, and a photoinitiator ( Igacure 907, manufactured by Ciba-Geigy Co., Ltd.) was used to prepare an alignment film precursor composition prepared by dissolving 0.5 parts by weight of the solvent (toluene) to about 96.8 parts by weight. After drying the composition for forming a photo-alignment film was irradiated with ultraviolet (100 mW / cm 2 ) at a rate of 3 m / min to perform an alignment treatment.
  • ultraviolet 100 mW / cm 2
  • a polarizing device was manufactured in the same manner as in Example 1, except that Acrylate RM (LC242, manufactured by BASF), which is a radical polymerizable liquid crystal compound, was used as the polymerizable liquid crystal compound.
  • Acrylate RM LC242, manufactured by BASF
  • Example 1 and Comparative Example 1 were cut into 10 mm ⁇ 10 mm (horizontal ⁇ vertical) sizes to prepare specimens, and then the absorbances of the polarizers were measured using N & K Analyer devices. After standing at 100 ° C. for 100 hours at 100 ° C., the absorbance according to the wavelength was measured again.
  • the absorption spectra of the polarizing elements of Example 1 and Comparative Example 1 thus measured are shown in FIG. 4.
  • Example 1 As shown in FIG. 4, before heat resistance, the polarizing elements of Example 1 and Comparative Example 1 exhibit similar absorption spectra. However, after heat resistance, the polarizing element of Example 1 maintains the absorption spectrum while the polarizing element of Comparative Example 1 can be seen that the wavelength showing the maximum absorbance is changed from about 580 nm to about 400 nm.
  • Test Example 2 heat resistant Optical properties evaluation

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  • Polarising Elements (AREA)

Abstract

La présente invention concerne une composition de cristaux liquides, un élément de polarisation, et une utilisation de l'élément de polarisation. Une composition de cristaux liquides de type invité-hôte de la présente application permet de produire un élément de polarisation par l'intermédiaire d'un simple procédé de revêtement, ce qui permet de réduire le coût de fabrication, permettant à un élément de polarisation d'être léger et mince, et la production d'un élément de polarisation présentant une excellente stabilité de résistance à la chaleur sans changement dans le spectre d'absorption ou le spectre de transmission même dans une condition difficile telle qu'un environnement à haute température. L'élément de polarisation peut être appliqué à divers dispositifs d'affichage tel qu'un dispositif d'affichage à cristaux liquides, un dispositif d'affichage EL, un dispositif d'affichage à émission de champ, un dispositif d'affichage mettant en œuvre un papier électronique, un dispositif d'affichage de type projection, ou un dispositif d'affichage céramique piézo-électrique.
PCT/KR2016/007194 2015-07-02 2016-07-04 Composition de cristaux liquides de type invité-hôte WO2017003268A1 (fr)

Priority Applications (3)

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JP2017506996A JP6500286B2 (ja) 2015-07-02 2016-07-04 偏光素子
CN201680002662.XA CN106715649B (zh) 2015-07-02 2016-07-04 宾主型液晶组合物
US15/504,972 US10495797B2 (en) 2015-07-02 2016-07-04 Guest-host type liquid crystal composition

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KR10-2015-0094600 2015-07-02
KR20150094600 2015-07-02
KR1020160084188A KR102118367B1 (ko) 2015-07-02 2016-07-04 게스트호스트형 액정 조성물
KR10-2016-0084188 2016-07-04

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JP2018120150A (ja) * 2017-01-27 2018-08-02 Jnc株式会社 異方性光変換材料用の組成物
WO2018213819A1 (fr) * 2017-05-19 2018-11-22 Kent State University Couche d'alignement photostable par blanchiment
CN111149048A (zh) * 2017-10-31 2020-05-12 株式会社Lg化学 透射率可变装置

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US5773178A (en) * 1996-09-13 1998-06-30 Japan Synthetic Rubber Co, Ltd. Process for producing a patterned anisotropic polymeric film
KR20080097232A (ko) * 2006-02-28 2008-11-04 니폰 오일 코포레이션 (신 니혼 세키유 가부시키 가이샤) 디옥세탄 화합물, 양이온 중합성 조성물, 광학필름 및 액정표시장치
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KR20150039122A (ko) * 2013-10-01 2015-04-09 주식회사 엘지화학 편광 소자

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018120150A (ja) * 2017-01-27 2018-08-02 Jnc株式会社 異方性光変換材料用の組成物
WO2018213819A1 (fr) * 2017-05-19 2018-11-22 Kent State University Couche d'alignement photostable par blanchiment
CN111149048A (zh) * 2017-10-31 2020-05-12 株式会社Lg化学 透射率可变装置
CN111149048B (zh) * 2017-10-31 2022-09-27 株式会社Lg化学 透射率可变装置

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