JPH0954311A - Production of liquid crystal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process for producing a liquid crystal device capable of easily removing the light controllable layer forming material parts sticking thereto at the time of injection. SOLUTION: This process for production comprises forming a light controllable layer contg. a liquid crystal material and a transparent solid material between two sheets of substrates, at least one of which have electrode layers by injecting the light controllable layer forming material contg. the liquid crystal material, polymerizable compsn. and polymn. initiator into a cell formed by sealing two sheets of the substrates and the peripheral edges of the substrates exclusive of the injection port part with a sealant, then polymerizing the photopolymerizable compsn. by irradiating the compsn. with active rays. The peripheral edges of the cell where the light controllable layer forming material stick in contact therewith are previously coated with a peelable material or material removable by dissolving and thereafter, the light controllable layer forming material is injected therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal device capable of forming a large area, and more specifically, to electrically control the blocking, opening, and limiting, blocking, and transmitting of light or illumination light. It is used as a screen for blocking the view of a building window or a show window, or as a curtain for lighting control, and displays characters and figures, and switches the display electrically with high-speed response. Accordingly, the present invention relates to a method for manufacturing a liquid crystal device used as a high information display such as a display or a projection device of an OA apparatus, an advertisement board, a guide board, a decorative display board, or the like.

[0002]

2. Description of the Related Art Bright and bright without the need for a polarizing plate and alignment treatment.
As a large-sized and inexpensive liquid crystal device having high contrast, Japanese Patent Publication No. 58-501631 and USP 4,43
5,047, JP-A-61-501345, JP-A-62-48789, etc., are prepared by encapsulating a liquid crystal to disperse liquid crystal droplets in a polymer and forming the polymer into a film. Liquid crystal devices having a light control layer are known.

In the technology disclosed in the above specification, liquid crystal molecules encapsulated by polyvinyl alcohol are present in the presence of an electric field if they have a positive dielectric anisotropy in the thin layer. Below, the liquid crystal molecules are aligned in the direction of the electric field, and when the ordinary refractive index n _o of the liquid crystal and the refractive index n _{p of the} polymer are equal, transparency is exhibited. When an electric field is removed, the liquid crystal molecules are returned to the random sequence, the refractive index of the liquid crystal droplets is deviated from the n _o, the liquid crystal droplets scatter light at the boundary surface, since blocking the transmission of light, Ususotai is It becomes cloudy.

As described above, there are several known techniques in which a polymer containing dispersed encapsulated liquid crystals is used as a thin film, for example, as described in JP-A-61-5.
No. 02128, a liquid crystal dispersed in an epoxy resin, Japanese Patent Application No. 61-305528 and Japanese Patent Laid-Open No. 6-305528.
JP-A-2-2231 discloses that a liquid crystal and a photocurable resin are phase-separated by irradiating a liquid mixture of a photocurable resin and a liquid crystal with ultraviolet rays to form a light control layer in which the liquid crystal is dispersed in the resin. How to do each is reported.

A driving voltage in a liquid crystal device having such a light control layer needs to be about 20 V or higher, and in many cases, a high voltage of 40 V or higher is required.

Further, light scattering performance required for a liquid crystal device,
In order to obtain light transmission performance, it is necessary to optimize the matching and mismatch between the refractive indices of the liquid crystal material and the resin component, and there is a limit in selecting a combination of the liquid crystal material and the resin material.

From these problems, Japanese Patent Laid-Open No. 1-198725 discloses that it enables low voltage driving characteristics, high contrast and time division driving, which are important characteristics required for practical use of the liquid crystal device as described above. Publication and Japanese Patent Application Laid-Open No. 2
No. 85822, the liquid crystal material forms a continuous layer,
A liquid crystal device having a light control layer formed by forming a three-dimensional network polymer substance in the continuous layer is disclosed.

In such a liquid crystal device, a light modulating layer forming material containing a liquid crystal material, a photopolymerizable composition and a photopolymerization initiator is interposed between two transparent substrates having an electrode layer.
By polymerizing the photopolymerizable composition by irradiating active light in the isotropic liquid state of the light control layer forming material,
It is possible to manufacture a high-performance liquid crystal device having a light control layer composed of a liquid crystal material and a transparent polymer substance as described above.

In this method of manufacturing a liquid crystal device, a dimming layer forming material is injected into an empty cell in which two substrates with electrodes are preliminarily provided with an injection port and the peripheral portion is fixed with a sealant, and the substrate with electrodes is injected. A method is employed in which a material for forming a light control layer is interposed therebetween, a photo-curable sealing agent is further applied to the injection port portion, and then an active ray such as an ultraviolet ray is irradiated.

[0010]

SUMMARY OF THE INVENTION In this method,
At the time of injection, the light control layer forming material containing the polymerizable composition adheres to the outer peripheral portion of the injection port, and the polymerizable compound is cured by the irradiation of ultraviolet rays, and it is difficult to remove the adhered material on that part. Met. In particular, this phenomenon is remarkable in an empty cell having a large area. That is, in an empty cell having a relatively small area, it is possible to inject only a necessary amount to be injected without adhering to the outer peripheral edge portion of the injection port portion,
In the case of an empty cell having a relatively large area, a large amount is required to be injected, and it is possible to use a dispenser or the like to inject without adhering to the outer peripheral portion of the injection port. In terms of yield, it is not usually used.

An object of the present invention is to provide a method for manufacturing a liquid crystal device, which can easily remove the light control layer forming material portion attached at the time of injection.

[0012]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have completed the present invention.

That is, in order to solve the above problems, the present invention is to seal two substrates having at least one transparent electrode layer and a peripheral portion of the substrates with a sealant except for an injection port. The photopolymerizable composition is prepared by injecting into the cell a light control layer forming material containing (1) a liquid crystal material, (2) a polymerizable composition and (3) a polymerization initiator, and then irradiating with actinic rays. In a method of manufacturing a liquid crystal device in which a dimming layer containing a liquid crystal material and a transparent solid substance is formed between two substrates by polymerizing, a peripheral portion of a cell to which the dimming layer forming material contacts and adheres is previously peeled off. Provided is a method for producing a liquid crystal device, which comprises injecting a light control layer forming material after coating with a possible material or a material capable of being dissolved and removed.

The light control layer forming material is injected to the outer peripheral portion of the cell end by injecting the light control layer forming material after coating the peripheral portion of the cell to which the light control layer forming material is attached by contact with a peelable material in advance. Direct attachment is prevented, and by removing the releasable material after the injection is completed, the adhered matter can be easily removed regardless of wiping, solvent cleaning, or other cleaning. In addition, after coating the peripheral portion of the cell to which the light control layer forming material is attached by contact with a material that can be dissolved and removed in advance, by injecting the light control layer forming material, after irradiating with actinic rays, washing with a solvent, The material that can be dissolved and removed and the deposit can be easily removed at the same time.

The substrate used in the present invention may be a rigid material such as glass or metal, or a flexible material such as a plastic film. The two substrates should face each other and should be spaced apart from each other at an appropriate interval, and at least one of them must be transparent so that the light control layer sandwiched between the two can be seen from the outside world. I have to. However, complete transparency is not essential. If the liquid crystal device is used to act on light passing from one side of the device to the other, both substrates are provided with the appropriate transparency. Appropriate transparent and opaque electrodes may be disposed on the entire or partial surface of the substrate depending on the purpose.

A dimming layer made of a liquid crystal material and a transparent solid substance is interposed between the two substrates, and the two substrates are normally spaced apart from each other, as in a known liquid crystal device. It is also possible to interpose a holding spacer.

As the spacer, for example, Mylar,
Various types of liquid crystal cells such as alumina and polymer beads can be used.

The liquid crystal material used in the present invention does not need to be a single liquid crystal compound, and may be a mixture containing two or more liquid crystal compounds or a substance other than the liquid crystal compound. Any material which is generally recognized as a liquid crystal material in this technical field may be used, and a material having a positive dielectric anisotropy is preferable. As a liquid crystal to be used, a nematic liquid crystal, a smectic liquid crystal, and a cholesteric liquid crystal are preferable, and a nematic liquid crystal is particularly preferable. In order to improve the performance, a cholesteric liquid crystal, a chiral nematic liquid crystal, a chiral smectic liquid crystal, a chiral compound, a dichroic dye, or the like may be appropriately contained.

The liquid crystal material used in the present invention is preferably a compounded composition comprising at least one compound selected from the group of compounds shown below. The properties of the liquid crystal material, that is, the phase transition between isotropic liquid and liquid crystal Temperature, melting point, viscosity, refractive index anisotropy (Δ
n), the dielectric anisotropy (Δε), the solubility with the polymerizable composition, and the like can be taken into consideration and appropriately selected and blended.

Examples of such liquid crystal materials include benzoic acid ester type, cyclohexylcarboxylic acid ester type, biphenyl type, terphenyl type, phenylcyclohexane type, biphenylcyclohexane type, pyrimidine type, pyridine type, dioxane type, cyclohexane cyclohexane ester type. , Various cyclohexylethane-based, tolan-based, alkenyl-based liquid crystal compounds are used.

Examples of the liquid crystal material used in the present invention include 4-substituted benzoic acid 4'-substituted phenyl ester and 4
-Substituted cyclohexanecarboxylic acid 4'-substituted phenyl ester, 4-substituted cyclohexanecarboxylic acid 4'-substituted biphenyl ester, 4- (4-substituted cyclohexanecarbonyloxy) benzoic acid 4'-substituted phenyl ester, 4- (4-substituted Cyclohexyl) benzoic acid 4'-substituted phenyl ester, 4- (4-substituted cyclohexyl)
Benzoic acid 4'-substituted cyclohexyl ester, 4-substituted 4'-substituted biphenyl, 4-substituted phenyl 4'-substituted cyclohexane, 4-substituted 4 "-substituted terphenyl, 4-
Substituted biphenyl 4'-substituted cyclohexane, 2- (4-
Substituted phenyl) -5-substituted pyrimidine and the like can be mentioned.

The content of the liquid crystal material and the polymerizable composition in the light control layer forming material is preferably in the range of 60:40 to 95: 5 by weight, particularly preferably in the range of 75:25 to 85:15. If the amount of the liquid crystal material is more or less than this range, the dispersed state of the liquid crystal material and the transparent solid substance will not be uniform, and the dimming function due to light scattering tends not to be exhibited, which is not preferable.

The transparent solid substance formed in the light control layer is
The liquid crystal material may be dispersed in the form of liquid droplets in the polymer, but one having a three-dimensional network structure is more preferable.

It is preferable that the transparent solid substance is formed in a three-dimensional network in a continuous layer of the liquid crystal material, and by forming a disordered alignment state of the liquid crystal material, an optical interface is formed and The strong scattering of can be expressed.

As the transparent solid substance, synthetic resin is suitable. As a material that gives a three-dimensional network structure, a photocurable resin obtained by polymerizing a polymerizable composition composed of a polymer-forming monomer or oligomer or a mixture thereof is suitable.

As a method for forming a transparent solid substance having a three-dimensional network structure in a continuous layer of a liquid crystal material, the light control layer forming material enclosed in the panel is kept active in an isotropic liquid state. A method of irradiating light rays to polymerize the polymerizable composition can be mentioned.

As the polymer-forming monomer, for example,
Styrene, chlorostyrene, α-methylstyrene, divinylbenzene: Substituents include methyl, ethyl, propyl, butyl, amyl, 2-ethylhexyl, octyl, nonyl, dodecyl, hexadecyl, octadecyl,
Having groups such as cyclohexyl, benzyl, methoxyethyl, butoxyethyl, phenoxyethyl, allyl, methallyl, glycidyl, 2-hydroxyethyl, 2-hydroxypropyl, 3-chloro-2-hydroxypropyl, dimethylaminoethyl, diethylaminoethyl, etc. Acrylate, methacrylate or fumarate; ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, 1,3-butylene glycol, tetramethylene glycol, hexamethylene glycol, neopentyl glycol, trimethylolpropane, glycerin, pentaerythritol, etc. ) Acrylate or poly (meth) acrylate; vinyl acetate, vinyl butyrate or vinyl benzoate,
Acrylonitrile, cetyl vinyl ether, limonene,
Cyclohexene, diallyl phthalate, diallyl isophthalate, 2-, 3- or 4-vinyl pyridine, acrylic acid, methacrylic acid, acrylamide, methacrylamide, N-hydroxymethyl acrylamide or N-hydroxyethyl methacrylamide and their alkyl ether compounds, Dimethyl or tri (meth) acrylate of triol obtained by adding 3 mol or more of ethylene oxide or propylene oxide to 1 mol of trimethylolpropane, or 2 mol or more of ethylene oxide or propylene oxide to 1 mol of neopentyl glycol. Di (meth) acrylate of diol obtained by 2
Reaction product of 1 mol of hydroxyethyl (meth) acrylate with 1 mol of phenyl isocyanate or n-butyl isocyanate, poly (meth) acrylate of dipentaerythritol, tris- (hydroxyethyl)
-Poly (meth) acrylate of isocyanuric acid, poly (meth) acrylate of tris- (hydroxyethyl) -phosphoric acid, mono (meth) acrylate or di (meth) acrylate of di- (hydroxyethyl) -dicyclopentadiene, pivalin Acid neopentyl glycol di (meth)
Examples thereof include acrylate, caprolactone-modified hydroxypivalic acid neopentyl glycol di (meth) acrylate, straight-chain aliphatic di (meth) acrylate, and polyolefin-modified neopentyl glycol di (meth) acrylate.

As the polymer-forming oligomer, for example, epoxy (meth) acrylate, polyester (meth) acrylate, polyurethane (meth) acrylate, polyether (meth) acrylate and the like can be used.

As the polymerization initiator, for example, 2-hydroxy-2-methyl-1-phenylpropan-1-one (“Darocur 1173” manufactured by Merck), 1-hydroxycyclohexyl phenyl ketone (manufactured by Ciba Geigy). Irgacure 184 "), 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane-1-
On (Merck "Darocur 1116"), benzyl dimethyl ketal (Ciba Geigy "Irgacure 651"), 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone-1 (Ciba)・ Geigy's "Irgacure 907"), 2,4-diethylthioxanthone (Nippon Kayaku's "Kayacure DET"
X ") and ethyl p-dimethylaminobenzoate (" Kayacure-EPA "manufactured by Nippon Kayaku Co., Ltd.), isopropylthioxanthone (" Kantacure ITX "manufactured by Ward Prekinsopp) and ethyl p-dimethylaminobenzoate And the like.

Examples of the actinic ray include ultraviolet rays, EB (electron beam), and visible rays.
It is preferable to use ultraviolet rays from the viewpoint of curability.

The thickness of the light control layer of the liquid crystal device obtained by the production method of the present invention is preferably in the range of 5 to 100 μm,
The range of 8 to 50 μm is particularly preferred.

In order to interpose the dimming layer forming material between the two substrates, the dimming layer forming material is placed in an empty cell composed of two substrates whose peripheral portion excluding the injection hole portion is hardened with a sealing material. Inject and do.

The releasable material used for previously covering the peripheral portion of the cell to which the light control layer forming material contacts and adheres is such that the light control layer forming material does not enter the gap between the releasable material and the cell surface. Any material can be used as long as it has adhesiveness with the cell surface, can be easily peeled from the cell, and does not adversely affect the characteristics of the light control layer-forming material. “Cellophane tape” (cellophane adhesive tape manufactured by Nichiban Co., Ltd.), a film-like material having an adhesive layer such as a vinyl tape, and a material having a film-forming property are mentioned. Further, even a material which is difficult to peel off can be used if the release agent is easily applied by previously applying a release agent to the cell surface.

As a method for forming a peelable coating film, a coating film-forming polymerizable monomer, oligomer or a compounded composition thereof is added with a polymerization initiator, if necessary, and then diluted with a diluent. Applying to the outer peripheral edge of the cell edge, then supplying energy for polymerization such as heating or light, by a method of polymerizing or curing, or a solution of a solvent-soluble resin capable of forming a coating film in a solvent, Similarly, a solvent casting method in which the composition is applied, dried and then cured is exemplified.

The polymerized cured products and resins used in these methods preferably have good adhesion to the substrate and good releasability. As such properties, the tensile strength is 100 kg / cm ² or more. A material having an elongation of 30% or less is preferable, and a tensile strength is 300 kg / c.
A material having an elongation of 10% or less and a m ² or more is particularly preferable.

Such a photo-curable monomer or oligomer is preferably a non-polar one, and preferably has a cross-linked structure in order to reduce the solubility in liquid crystal, and for that purpose, it is a polyfunctional monomer. It is desirable that an oligomer is blended. Examples of such a monomer, an oligomer or a compounded composition thereof include “KAYARAD HX-220” manufactured by Nippon Kayaku Co., Ltd.,
"Kayarad R-526", "Kayarad R-55
1 "," Kayarad R-712 "," Kayarad T
PA-320 "," Kayarad TPA-330 ",
"Kayarad HBA-024E", "Kayarad D
PCA-20 "," Kayarad DPCA-30 ",
"Kayarad D-310", "Kayarad D-33
0 "," M-315 "," M-31 "manufactured by Toagosei Co., Ltd.
0 "," M-6500 "," M-6100 "," M-6 "
200 "," M-6250 "," NK "made by Shin Nakamura Chemical Co., Ltd.
Ester APG-200 "," NK Ester APG-
400 "," NK Ester APG-700 "," NK
Ester A-BPE-4 "," NK Ester BPE
-100 "," NK Ester BPE-200 "," N
K ester BPE-500 "," BP manufactured by Kyoei Chemical Co., Ltd. "
-4PA "," BP-4EA "," BP-2PA ",
"BA-134", "Light Ester BLP-2E
"M", "Light Ester 1 / 10DC", "Photomer 4028", "Photomer 407" manufactured by San Nopco Ltd.
2 "," Photomer 4094 "," Photomer 412 "
6 "," Photomer 4127 "," Photomer 414 "
9 "," 3051 "," 304 "manufactured by ThreeBond Co., Ltd.
2 "," 3062D "," 3026 "," 3054 ",
Sekisui Fine Chemical's "Photorec A-70"
4 ”,“ Photorec A-714 ”and the like.

As the resin used for the coating film formed by the solvent casting method, a general-purpose acrylic resin, styrene resin, polycarbonate or the like is used.

When the thermal polymerization method is used, it is also useful to use a coating film forming material which matches the curing conditions of the thermosetting sealing material in the production of empty cells and to be able to form a coating film simultaneously with the production of empty cells. .

From the viewpoint of workability, an ultraviolet curable material is preferable. When the ultraviolet curing method is used, the surface curability is impaired due to the influence of air, and an uncured portion often remains. In that case, curing may be performed in an atmosphere of an inert gas such as nitrogen.

Durability, which is a practical problem in general films and coating films for paints, does not matter and can be used only once.
Therefore, the number of polymer species used can be expanded.

As the material which can be dissolved and removed when the peripheral portion of the cell to which the light control layer forming material is contact-adhered is previously coated, the material used in the commonly used resist method is effective, and it is applied and cured. After that, a material that can be washed off with a specific solvent, water, etc. after the intended use may be used.

For example, for polyvinyl alcohol applied and dried on the peripheral portion of the cell to which the light control layer forming material is contacted and adhered, the light control layer forming material is injected, and a sealing material is applied to the injection port, followed by irradiation with actinic rays. After forming the light control layer by the above method and sealing the injection port, by washing with a cleaning liquid such as water, it can be dissolved and removed together with the polymerized cured product of the light control layer forming material adhered to the peripheral portion of the injection port.

[0043]

EXAMPLES The present invention will be described in more detail below with reference to examples. However, the invention is not limited to these examples.

In the following examples, "parts" and "%" represent "parts by weight" and "% by weight", respectively. In addition, each of the evaluation characteristics means the following symbols and contents.

(1) T ₀ : white turbidity; light transmittance (%) when applied voltage is 0 (2) T ₁₀₀ : transparency; light when the applied voltage is increased and the light transmittance almost stops increasing. Transmittance (%) (3) V ₉₀ : Saturation voltage; same as above _Applied voltage (V _rms ) at which the light transmittance is 90%. Further, the illuminance of ultraviolet rays is the photodetector UVD manufactured by Ushio Inc.
It measured using the Unimeter with -365PD (UIT-101).

Example 1 One of two 1.1 mm-thick transparent glass substrates with ITO electrodes formed on one substrate.
Spacers composed of 2 micron polymer beads (Micropearl SP210 manufactured by Sekisui Fine Chemical Co., Ltd.) were scattered, and a sealing agent "DSA-00" was applied to the peripheral portion of the other substrate.
1 "(manufactured by Rodick Co., Ltd.) is applied to the central portion of the end portion in the short side direction except for the injection port portion having a size of about 5 mm, the two substrates are bonded together, and then baked and cured to 20 cm × Thirty
An empty cell with a cm square and a cell thickness of 12 μm was produced.

Next, the ultraviolet curable resin composition "PHOTOREC A" was applied to the side of the empty cell that was dipped in the light control layer forming material at the time of injection and around the cell surface up to about 10 mm from the end. -704-180 "(manufactured by Sekisui Fine Chemical Co., Ltd.) was applied and then cured by irradiation with ultraviolet rays to form a peelable coating film.

"PN-001" (manufactured by Rodic) 79% as a liquid crystal composition, "Kayarad HX-620" (photocaprolactone-modified hydroxypivalate neopentylglycol diacrylate manufactured by Nippon Kayaku) as a photopolymerizable composition. A dimming layer forming material comprising 10.2%, 10.0% of lauryl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 0.8% of "Irgacure 651" (benzyl dimethyl ketal manufactured by Ciba-Geigy) as a photopolymerization initiator was prepared. Then
Place in a liquid crystal dish in a vacuum chamber, and immerse the empty cell in a liquid crystal tank while keeping the temperature of the empty cell that has been evacuated in advance at 40 ° C., then leak the vacuum and gradually return to normal pressure. The light control layer forming material was injected into the.

In this way, the light control layer forming material was injected.
After taking out the cell, "Photorec A-704-18
0 "(manufactured by Sekisui Fine Chemical Co.)
After peeling off the coating, the photocurable sealing agent "Sleebo"
3030 "(manufactured by ThreeBond) and applied at 36 ° C
Illuminance of the substrate irradiation surface is 40 mW / cm ² 
UV light for 30 seconds to irradiate the light control layer forming material
The photopolymerizable composition and the photocurable sealing agent are hardened to give a cloudiness.
A liquid crystal device having an opaque light control layer was obtained.

The relationship between the applied voltage and the light transmittance of the liquid crystal device thus obtained was measured, and as a result, T ₀ = 2.9%,
T ₁₀₀ = 87.5% and V ₉₀ = 8.8 V _rms .

In this liquid crystal device, there was no part other than the end face of the injection port to which the light control layer forming material was attached.

(Example 2) The same empty cell as that used in Example 1 was used, and on the side of the empty cell to be dipped in the light control layer forming material at the time of injection, from the end to about 10 mm, poly A solution obtained by mixing methyl methacrylate (Dianal BR Resin BR-55 manufactured by Mitsubishi Rayon Co., Ltd.) and chloroform in a weight ratio of 1:10 was applied, and the mixture was dried and solidified until chloroform was almost completely volatilized to form a peelable film. Formed.

After injecting the light control layer forming material in the same manner as in Example 1, a photo-curable sealing agent "Three Bond 30" was introduced into the injection port.
51 "is applied, and while maintaining the temperature at 36 ° C., the substrate is irradiated with ultraviolet rays having an illuminance of 40 mW / cm ² for 30 seconds to obtain a photopolymerizable composition in the light control layer forming material and a photocurable sealing material. The agent was cured to obtain a liquid crystal device having a dull opaque light control layer. After that, when the solidified polymethylmethacrylate was washed off with chloroform, there was no portion where the cured product of the light control layer forming material adhered to the outer surface of the cell.

(Comparative Example 1) In Example 1, the dimming layer forming material was injected without forming a peelable coating film made of "PHOTOREC A-704-180" (manufactured by Sekisui Fine Chemical Co., Ltd.). The light control layer forming material adhered to the portion 5 mm from the injection end face. Without wiping off the light control layer forming material adhering to the cell peripheral portion, a photo-curable sealing agent "Three Bond 3051" was applied to the injection port portion and irradiated with ultraviolet rays, the cured product adhered to the cell outer surface. The portion was washed with ethanol, but a considerable amount of the cured product remained without being removed.

[0055]

According to the manufacturing method of the present invention, the light control layer forming material adhered to the peripheral portion of the substrate at the time of injection can be easily removed, so that the manufacturing process of the liquid crystal device becomes efficient and the productivity is greatly improved. . Therefore, the present invention is useful as a method for manufacturing a liquid crystal device.

Claims (3)

[Claims] 1. A cell in which at least one substrate having an electrode layer is transparent and a peripheral portion of the substrate is sealed with a sealant except for an injection port, (1) a liquid crystal material, (2) )
After injecting a light control layer forming material containing a polymerizable composition and (3) a polymerization initiator, the photopolymerizable composition is polymerized by irradiating with an actinic ray to polymerize the liquid crystal material between two substrates. And a liquid crystal device manufacturing method for forming a dimming layer containing a transparent solid substance, wherein the peripheral portion of the cell to which the dimming layer forming material contacts and adheres is previously coated with a peelable material or a material capable of being dissolved and removed. Then, a method for manufacturing a liquid crystal device, which comprises injecting a light control layer forming material. 2. The method for manufacturing a liquid crystal device according to claim 1, wherein the actinic rays are ultraviolet rays. 3. The method for producing a liquid crystal device according to claim 1, wherein the light control layer forming material is irradiated with an actinic ray in an isotropic liquid state.