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WO2020017622A1 - Composition photoréactive, cellule à cristaux liquides faisant appel à la composition photoréactive, et procédé de production de cellule à cristaux liquides - Google Patents

Composition photoréactive, cellule à cristaux liquides faisant appel à la composition photoréactive, et procédé de production de cellule à cristaux liquides Download PDF

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Publication number
WO2020017622A1
WO2020017622A1 PCT/JP2019/028391 JP2019028391W WO2020017622A1 WO 2020017622 A1 WO2020017622 A1 WO 2020017622A1 JP 2019028391 W JP2019028391 W JP 2019028391W WO 2020017622 A1 WO2020017622 A1 WO 2020017622A1
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WIPO (PCT)
Prior art keywords
liquid crystal
photoreactive
group
cell
compound
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Ceased
Application number
PCT/JP2019/028391
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English (en)
Japanese (ja)
Inventor
喜弘 川月
瑞穂 近藤
小野　浩司
友之 佐々木
一世 三宅
耕平 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Chemical Corp
Nagaoka University of Technology NUC
University of Hyogo
Original Assignee
Nissan Chemical Corp
Nagaoka University of Technology NUC
University of Hyogo
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Publication date
Application filed by Nissan Chemical Corp, Nagaoka University of Technology NUC, University of Hyogo filed Critical Nissan Chemical Corp
Priority to JP2020531375A priority Critical patent/JP7471577B2/ja
Publication of WO2020017622A1 publication Critical patent/WO2020017622A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/38—Polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • 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
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals

Definitions

  • the present invention relates to a photoreactive composition, a liquid crystal cell using the photoreactive composition, and a method for producing a liquid crystal cell.
  • Non-patent document 1 a liquid crystal alignment film that has been subjected to an alignment process to uniformly align the liquid crystal
  • the alignment treatment of the liquid crystal alignment film is performed by applying a liquid crystal alignment film and then rubbing the film surface with a roller wrapped with a cloth, which is generally called rubbing treatment. Rubbing, there is a problem that scratches and scraps due to rubbing reduce the display performance of the liquid crystal display element. Further, this alignment treatment requires a number of steps including a liquid crystal alignment film forming step, a liquid crystal alignment processing step, and a liquid crystal alignment film cleaning step, which complicates the manufacturing process. Therefore, if a liquid crystal cell in which the alignment of the liquid crystal can be controlled can be manufactured without using the liquid crystal alignment film, there is a great merit in terms of process and cost.
  • Patent Document 1 discloses a photoreactive liquid crystal composition that can provide an optical element and a display element without actually using a liquid crystal alignment film.
  • the photoreactive liquid crystal composition disclosed in Patent Document 1 has a photoreactive side chain that produces at least one type of reaction selected from the group consisting of (A) (A-1) photocrosslinking and (A-2) photoisomerization. And (B) a low-molecular liquid crystal.
  • A the photoreactive high-molecular liquid crystal
  • Patent Document 2 discloses a photoreactive liquid crystal composition having (A) a photoreactive compound having a siloxane skeleton and having a photoreactive group; and (B) a low-molecular liquid crystal.
  • an object of the present invention is to provide a photoreactive composition for producing a liquid crystal cell obtained by controlling the orientation of a liquid crystal in a liquid crystal bulk without using a liquid crystal alignment film. Further, an object of the present invention is to provide a photoreactive composition which has a high uniform mixing property with the low-molecular liquid crystal (B) and a low mixing amount without using a liquid crystal alignment film even when the mixing amount is small. It is an object of the present invention to provide a photoreactive compound capable of uniformly aligning molecular liquid crystals.
  • an object of the present invention is, in addition to or in addition to the above objects, a method of manufacturing a liquid crystal cell having a photoreactive composition, without using a liquid crystal alignment film, and by controlling the alignment of liquid crystals in a liquid crystal bulk. It is to provide an element obtained by control, specifically, a display element and an optical element.
  • a compound having at least one polymerizable group and a photoreactive site, and a polymer in which the polymerizable group is polymerized has liquid crystallinity.
  • the photoreactive site may have a group derived from cinnamic acid.
  • Y 1 represents a ring selected from a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a pyrrole ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms;
  • l represents an integer of 1 to 12, preferably 2 to 6.
  • m represents an integer of 0 to 2.
  • P and Q represent an alkyl group having 1 to 5 carbon atoms or an alkyloxy group having 1 to 5 carbon atoms, and s and t each represent an integer of 0 to 4. ) It is better represented by
  • At least one polymerizable group may be a (meth) acrylate group.
  • the compound may be a compound represented by the following formula MCB2A.
  • ⁇ 6> (A) a compound having at least one polymerizable group and a photoreactive site, and a polymer in which the polymerizable group is polymerized has liquid crystallinity; and (B) a low-molecular liquid crystal;
  • the photoreactive site may have a group derived from cinnamic acid.
  • the photoreactive site having a group derived from cinnamic acid is represented by the general formula (I) (where A, B, X, Y 1 , 1, m, n, P, Q, s, and t have the same definitions as above).
  • At least one polymerizable group may be a (meth) acrylate group.
  • the compound (A) may be represented by the above formula MCB2A.
  • I) a photoreactive composition comprising (A) a compound having at least one polymerizable group and a photoreactive site, wherein the polymer having the polymerizable group polymerized has liquid crystallinity; and (B) a low molecular weight liquid crystal.
  • Encapsulating in a cell II) heating the cell to a temperature at which the (B) low-molecular liquid crystal becomes an isotropic phase; III) a step of irradiating the heated cell with polarized light; and IV) a step of gradually cooling the heated cell to room temperature.
  • the “(A) compound”, “(B) low-molecular liquid crystal” and “photoreactive composition” have the same definition as above.
  • the present invention it is possible to provide a photoreactive composition for producing a liquid crystal cell obtained by controlling the orientation of a liquid crystal in a liquid crystal bulk without using a liquid crystal alignment film.
  • a photoreactive composition for producing a liquid crystal cell obtained by controlling the orientation of a liquid crystal in a liquid crystal bulk without using a liquid crystal alignment film.
  • (B) A photoreactive compound capable of uniformly aligning low-molecular liquid crystals can be provided.
  • a method of manufacturing a liquid crystal cell having a photoreactive composition without using a liquid crystal alignment film, and controlling the alignment of liquid crystals in a liquid crystal bulk.
  • a display element and an optical element can be provided.
  • FIG. 3 is a view showing a polarized UV-vis absorption spectrum of the quartz substrate in the liquid crystal cell Z-1 of Example 1.
  • a solid line indicates an absorption spectrum in a direction parallel to a polarization electric field of polarized ultraviolet light applied to the liquid crystal cell, and a dotted line indicates an absorption spectrum in a direction perpendicular to the polarization electric field.
  • FIG. 9 is a view showing a polarized UV-vis absorption spectrum of a quartz substrate in a liquid crystal cell Z-2 of Example 2.
  • a solid line indicates an absorption spectrum in a direction parallel to a polarization electric field of polarized ultraviolet light applied to the liquid crystal cell
  • a dotted line indicates an absorption spectrum in a direction perpendicular to the polarization electric field.
  • the present application provides a photoreactive compound, a photoreactive composition, a liquid crystal cell using the photoreactive composition, and a method for manufacturing a liquid crystal cell.
  • a photoreactive compound of the present invention is a compound having at least one polymerizable group and a photoreactive site, and a polymer obtained by polymerizing with the polymerizable group exhibits liquid crystallinity.
  • the “polymer” of the “polymer obtained by polymerization with a polymerizable group” or the “polymer polymerized by a polymerizable group” refers to a photoreactive compound as a monomer, It refers to a polymer obtained by polymerizing two or more of the monomers by the polymerization reaction of the “polymerizable group”, and includes a so-called dimer or more, ie, a so-called oligomer.
  • ⁇ Photoreactive site >> The photoreactive site is preferably a site that causes at least one reaction selected from the group consisting of (A-1) photocrosslinking and (A-2) photoisomerization.
  • the structure of the photoreactive site is not particularly limited, but has a structure that causes the reaction shown in the above (A-1) and / or (A-2), and (A-1) has a structure that causes a photocrosslinking reaction. Is preferred.
  • (A-1) The structure that causes a photocrosslinking reaction is preferable in that the structure after the reaction can stably maintain the orientation of the photoreactive compound for a long period of time even when exposed to external stress such as heat.
  • Examples of the photoreactive group serving as a photoreactive site include the following structures and derivatives thereof, but are not limited thereto.
  • the photoreactive compound i) react with light in a wavelength range of 250 nm to 400 nm, and a polymer in which a polymerizable group is polymerized exhibit liquid crystallinity in a temperature range of 50 to 300 ° C.
  • the photoreactive compound preferably has ii) a photoreactive group that reacts with light in the wavelength range of 250 nm to 400 nm, in particular, polarized ultraviolet light.
  • the photoreactive compound is polymerized by heating or the like, it is preferable that the photoreactive compound has a mesogen group because it shows liquid crystallinity in a temperature range of 50 to 300 ° C. and can stabilize the alignment of the liquid crystal.
  • Examples of the mesogen component include, but are not limited to, a biphenyl group, a terphenyl group, a phenylcyclohexyl group, a phenylbenzoate group, and an azobenzene group.
  • the structure of the polymerizable group of the photoreactive compound includes, for example, a radical polymerizable group such as (meth) acrylate, itaconate, fumarate, maleate, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide, norbornene, and siloxane. At least one member selected from the group can be used, but is not limited thereto.
  • the photoreactive site may have a group derived from cinnamic acid.
  • the photoreactive site having a group derived from cinnamic acid is preferably represented by the following general formula (I).
  • Y 1 represents a ring selected from a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a pyrrole ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms;
  • l represents an integer of 1 to 12, preferably 2 to 6.
  • m represents an integer of 0 to 2.
  • P and Q represent an alkyl group having 1 to 5 carbon atoms or an alkyloxy group having 1 to 5 carbon atoms, and s and t each represent an integer of 0 to 4.
  • the photoreactive compound of the present invention has at least one polymerizable group.
  • the “polymerizable group” refers to a group that can become a growth active species by heat or light and can proceed in a chain reaction.
  • the polymerizable group for example, at least one selected from the group consisting of (meth) acrylate group, radical polymerizable group such as itaconate, fumarate, maleate, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide, norbornene, and siloxane.
  • radical polymerizable group such as itaconate, fumarate, maleate, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide, norbornene, and siloxane.
  • One type may be mentioned, but not limited thereto.
  • the at least one polymerizable group is preferably at least one selected from the group consisting of a (meth) acrylate group, itaconate, fumarate, maleate, ⁇ -methylene- ⁇ -butyrolactone, and styrene, and more preferably It is preferably at least one selected from the group consisting of a (meth) acrylate group, itaconate, ⁇ -methylene- ⁇ -butyrolactone, and styrene.
  • (meth) acrylate is a polymerizable group in which polymerization proceeds in the step (B) of heating the low-molecular liquid crystal to a temperature at which the low-molecular liquid crystal becomes an isotropic phase in the above-mentioned step II) (details will be described later). Is good.
  • the photoreactive compound of the present invention is a compound having at least one polymerizable group and a photoreactive site, and a polymer obtained by polymerizing with the polymerizable group exhibits liquid crystallinity.
  • liquid crystallinity refers to a property of being in a liquid crystal state at a certain temperature.
  • the photoreactive compound of the present invention is preferably a compound represented by the following formula MCB2A.
  • the present application provides a photoreactive composition.
  • the photoreactive composition of the present invention comprises (A) a compound having at least one polymerizable group and a photoreactive site, and a polymer in which the polymerizable group is polymerized has liquid crystallinity; and (B) a low-molecular liquid crystal.
  • the compound (A) is the above-mentioned "photoreactive compound", and the details are as described above.
  • (B) low molecular liquid crystal As the (B) low-molecular liquid crystal contained in the photoreactive composition of the present invention, a nematic liquid crystal or a ferroelectric liquid crystal conventionally used for a liquid crystal display device or the like can be used as it is.
  • (B) cyanobiphenyls such as 4-cyano-4'-n-pentylbiphenyl and 4-cyano-4'-n-heptyloxybiphenyl as low-molecular liquid crystals; cholesteryl acetate, cholesteryl benzoate and the like; Cholesteryl esters; carbonic esters such as 4-carboxyphenylethyl carbonate and 4-carboxyphenyl-n-butyl carbonate; phenyl esters such as phenyl benzoate and biphenyl phthalate; benzylidene-2-naphthylamine, 4 ′ Schiff bases such as -n-butoxybenzylidene-4-acetylaniline; benzidines such as N, N'-bisbenzylidenebenzidine and p-dianisalbenzidine; 4,4'-azoxydianisole, 4,4 ' A-di-n-butoxyazoxybenzene Kishibenzen like;
  • the weight ratio of (A) the photoreactive compound to (B) the low-molecular liquid crystal is 0.3: It is 99.7 to 15:85, preferably 0.5: 99.5 to 10:90, and more preferably 0.7: 99.3 to 7:93.
  • the density of the polymer matrix after the photoreactive compound (A) has reacted with polarized ultraviolet light has a desired value
  • the low-molecular liquid crystal (B) upon application of a voltage has a desired response. It is good in such points as performing.
  • the photoreactive composition of the present invention may contain components other than (A) the photoreactive compound described above and (B) a low-molecular liquid crystal.
  • other components include polymerizable compounds having at least one polymerizable group that does not exhibit photoreactivity, and photooxidants such as hindered amines and hindered phenols. Not limited.
  • the present invention provides a liquid crystal cell formed using the above-described photoreactive composition and a method for producing the same.
  • the liquid crystal cell of the present invention can be formed by filling the above-mentioned photoreactive composition in the cell.
  • the liquid crystal cell of the present invention can be manufactured by the following steps.
  • the method for producing a liquid crystal cell of the present invention comprises: I) a photoreactive composition comprising (A) a compound having at least one polymerizable group and a photoreactive site, wherein the polymer having the polymerizable group polymerized has liquid crystallinity; and (B) a low molecular weight liquid crystal.
  • Step I) is a step of enclosing the photoreactive composition in a cell.
  • the cells are provided as spaces formed between parallel spaced substrates. At least one of the substrates spaced apart in parallel is made of a substrate that transmits the polarized light to be described later.
  • the substrate is a substrate that transmits the polarized light described below and transmits the polarized light.
  • the substrate is not particularly limited as long as it has resistance to the temperature increase in the step II). Examples thereof include glass; acrylic, polycarbonate, PET, and polyamide. And a plastic such as polyimide.
  • the substrate may have flexibility depending on the liquid crystal cell to be formed.
  • the substrate forms various films on the space side, for example, films formed from polyvinyl alcohol, polyether, polyethylene, PET, polyamide, polyimide, acrylic, polycarbonate, polyurea, etc., depending on the liquid crystal cell to be formed. You may.
  • the film used here preferably has, for example, the following effects. That is, in the step II) described below, in order to induce a photoreaction of the (A) photoreactive compound, the (A) photoreactive compound is so polarized that the molecular long axis of the (A) photoreactive compound absorbs polarized light.
  • the reactive compound is preferably arranged in the liquid crystal cell.
  • the polarization direction of the polarized ultraviolet light is set so that the direction of the incident light is close to (A) the direction of the molecular long axis of the photoreactive compound. Exposure to ultraviolet light is preferred. For example, when the polarized ultraviolet light is exposed from the normal direction of the liquid crystal cell, it is preferable that the molecular long axis of the (A) photoreactive compound in the photoreactive composition is arranged in a direction parallel to the substrate surface.
  • the film of the substrate is not limited to a material as long as it is such a film.
  • the molecular long axis of the photoreactive compound (A) is not in a direction parallel to the above-described substrate surface, it is necessary to determine the incident angle of the polarized ultraviolet light in accordance with the arrangement of the molecular long axis. Good.
  • Step II) is a step of heating the cell to a temperature at which (B) the low-molecular liquid crystal becomes an isotropic phase.
  • the “isotropic phase” refers to a state in which the low-molecular liquid crystal has exceeded the clearing point and has become a liquid.
  • the temperature at which the liquid crystal becomes an isotropic phase depends on (B) the low-molecular liquid crystal used. For example, if the (B) low-molecular liquid crystal is ZLI-4792 manufactured by Merck Co., Ltd., the temperature rise temperature is 93 ° C. or higher. Preferably it is.
  • the temperature at which the low-molecular liquid crystal becomes an isotropic phase is a temperature at which the polymerizable group of the (A) photoreactive compound can react
  • the polymerized (A) photoreactive compound is deposited on the substrate interface. This is preferable because the efficiency of the polarized light reaction in the step III) is improved and the alignment of the low-molecular liquid crystal is improved.
  • Step III) is a step of irradiating polarized light to the cell in a heated state.
  • the polarization depends on (A) the photoreactive compound used, (B) the low-molecular liquid crystal used, the substrate used, and the like, but polarized ultraviolet light having a wavelength in the range of 100 nm to 400 nm can be used.
  • an optimal wavelength is selected via a filter or the like depending on the type of the coating film to be used.
  • polarized ultraviolet light having a wavelength in the range of 290 nm to 400 nm can be selected and used so that a photocrosslinking reaction can be selectively induced.
  • the ultraviolet light for example, light emitted from a high-pressure mercury lamp can be used.
  • the photoreactive compound (A) in the liquid crystal cell has an orientation according to the polarized ultraviolet light. Further, (B) the low-molecular liquid crystal is oriented according to the orientation of (A) the photoreactive compound. Thereby, (A) the photoreactive compound and (B) the low-molecular liquid crystal have an orientation according to polarized ultraviolet rays.
  • the step IV) is a step of gradually cooling the cell in the heated state to room temperature.
  • the photoreactive composition obtained by mixing the (A) photoreactive compound and (B) the low molecular liquid crystal may be cooled at the time of slow cooling.
  • the orientation of the low-molecular liquid crystal is improved.
  • the step (B) of raising the temperature of the liquid crystal cell to a temperature at which the low-molecular liquid crystal becomes an isotropic phase and irradiating the cell in that state with non-polarized ultraviolet light can be provided.
  • the liquid crystal cell obtained from the photoreactive composition of the present invention by the above method or the like can be used for various optical elements, for example, a display element, an optical element, a light control element, and the like.
  • Example 1 To 1 part by weight of the compound represented by the above formula MCB2A, 99 parts by weight of ZLI-4792 (manufactured by Merck Ltd.) were mixed to prepare a photoreactive composition X-1. Photoreactive composition X-1 showed no precipitation of MCB2A on ZLI-4792, confirming that it was uniformly mixed.
  • a cell was prepared separately from the preparation of the photoreactive composition X-1.
  • the cells were arranged in parallel to form a cell.
  • the photoreactive composition X-1 was injected into the prepared cell by a capillary method. Thereafter, the temperature of the cell was raised to 100 ° C., and while the temperature was maintained at that temperature, 313 nm linearly polarized ultraviolet light (10 mW / cm 2 ) was irradiated with 0.2 J / cm 2 using a high-pressure mercury lamp. After the light irradiation, the resultant was gradually cooled to room temperature at 20 ° C./min to obtain a liquid crystal cell Y-1.
  • Example 2 With respect to 0.9 parts by weight of the compound represented by the above formula MCB2A, 99 parts by weight of ZLI-4792 (manufactured by Merck), 0.1 parts by weight of EGDA shown by the following formula, and IRGACURE 819 (manufactured by BASF) were added. 01 parts by weight were mixed to prepare a photoreactive composition X-2.
  • the photoreactive composition X-2 did not show any precipitation of MCB2A on ZLI-4792, confirming that it was uniformly mixed.
  • the photoreactive composition X-2 was injected into the cell fabricated in the same manner as in Example 1, and the temperature was increased, linearly polarized ultraviolet rays were irradiated, and the film was gradually cooled as in Example 1. Thus, a liquid crystal cell Y-2 was obtained. However, instead of irradiating the linearly polarized ultraviolet light of 313 nm (10 mW / cm 2 ) of Example 1 with 0.2 J / cm 2 , the linearly polarized ultraviolet light was irradiated with “linearly polarized ultraviolet light of 405 nm (10 mW / cm 2 )”. For 18 J / cm 2 .
  • Photoreactive composition X-3 did not show any precipitation of Si-1 on ZLI-4792, confirming that it was uniformly mixed.
  • the photoreactive composition X-3 was injected into the cell prepared in the same manner as in Example 1, as in Example 1, and the temperature was increased, linearly polarized ultraviolet rays were irradiated, and then cooled as in Example 1. Thus, a liquid crystal cell Y-3 was obtained.
  • “313 nm linearly polarized ultraviolet light (10 mW / cm 2 ) with 0.2 J / cm 2 ” in Example 1 “313 nm linearly polarized ultraviolet light (50 mW / cm 2 )” was used.
  • Example 1 instead of irradiating “313 nm linearly polarized ultraviolet light (10 mW / cm 2 ) with 0.2 J / cm 2 ” in Example 1, “313 nm linearly polarized ultraviolet light (50 mW / cm 2 )” was used.

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Abstract

L'invention concerne une composition photoréactive permettant de produire une cellule à cristaux liquides qui est obtenue en contrôlant l'orientation des cristaux liquides à l'intérieur de la masse de cristaux liquides sans utiliser de film d'orientation de cristaux liquides. L'invention concerne la composition photoréactive qui comprend : (A) un composé comprenant au moins un groupe polymérisable et une fraction photoréactive, un polymère obtenu par polymérisation du groupe polymérisable ayant une cristallinité liquide ; et (B) un cristal liquide de faible masse moléculaire.
PCT/JP2019/028391 2018-07-20 2019-07-19 Composition photoréactive, cellule à cristaux liquides faisant appel à la composition photoréactive, et procédé de production de cellule à cristaux liquides Ceased WO2020017622A1 (fr)

Priority Applications (1)

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JP2020531375A JP7471577B2 (ja) 2018-07-20 2019-07-19 光反応性組成物、光反応性組成物を用いた液晶セル、及び液晶セルの製造方法

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JP2018-136600 2018-07-20
JP2018136600 2018-07-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021235088A1 (fr) * 2020-05-21 2021-11-25 Jsr株式会社 Élément à cristaux liquides et son procédé de production

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