JPH05203932A - Coating method with liquid crystal material and production of liquid crystal member - Google Patents

Abstract

PURPOSE:To easily form various liq. crystal members each having a uniform coating thickness of a liq. crystal in a high yield. CONSTITUTION:When coating by electrodeposition is carried out with a polymer binder soln., an electrophoretic liq. crystal material is finely dispersed in the soln. and a substrate to be coated as a principal electrode and a counter electrode are arranged in the soln. Electric current is then supplied to deposit the finely dispersed liq. crystal material on the entire surface or an arbitrary region of the substrate by an electrochemical reaction or electrical adsorption, the substrate is taken out and the solvent is removed by drying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a liquid crystal material, and more specifically, to a liquid crystal material which is finely dispersed in a binder solution, to which the liquid crystal material can be electrically applied by imparting an electrodeposition property to various liquid crystal members. The present invention relates to a method for applying a liquid crystal material and a method for manufacturing a liquid crystal member, which facilitates production and improves yield.

[0002]

2. Description of the Related Art A so-called polymer dispersed liquid crystal panel manufactured by applying liquid crystal dispersed in a binder aqueous solution onto a substrate is based on applying a solution containing a liquid crystal material to a panel electrode surface. There is. A general method for applying a liquid dispersion of fine oil droplets of a liquid crystal material or a liquid crystal liquid of a microcapsule type polymer dispersion to a panel surface is to use a solution containing a liquid crystal material by wire bar coating, knife coating, gieser, or another method. A liquid crystal panel is obtained by applying a uniform thickness to the panel surface so as to have a predetermined thickness, drying the solvent (water), and then bonding the counter electrode panel.

[0003]

The polymer-dispersed liquid crystal liquid is treated in an aqueous solution in order to facilitate the dispersion of fine oil droplets of liquid crystal and the production of microcapsules. It contains polyvinyl alcohol and other water-soluble polymer materials in appropriate amounts. Therefore, the liquid containing the liquid crystal material is an aqueous thixotropic solution. Therefore, the coating properties are generally poor, and it is not easy to form a uniform liquid crystal layer due to the inclusion of bubbles. Further, in order to set the thickness of the liquid crystal material layer to several μm to several tens of μm at the time of drying, there is a problem that it takes a sufficient time to dry for a long time. In order to use the polymer-dispersed liquid crystal panel as a high-quality display panel, there should be no dust, bubbles, coating unevenness, etc. in the liquid crystal material layer, and therefore defoaming of the coating liquid and difficulty of coating and drying are difficult. Therefore, it is the current situation that a high quality display panel cannot be manufactured at a low cost due to major problems in the manufacturing speed of the panel, the yield rate, and so on. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a liquid crystal material coating method capable of easily manufacturing various liquid crystal members having a uniform liquid crystal coating thickness with a high yield.

[0004]

The above object can be achieved by the present invention described below. That is, the present invention provides an electrodeposition coating method using a polymer binder solution, wherein the binder solution contains an electrophoretic liquid crystal material finely dispersed in the solution, and a main electrode serving as a coating substrate in the solution. It is characterized in that a counter electrode is arranged and electricity is applied, and the finely dispersed liquid crystal material is electrically adsorbed or electrochemically deposited on the entire surface or an arbitrary area of the coated substrate, and then the coated substrate is taken out and the solvent is dried and removed. And a method for producing a liquid crystal member, which comprises transferring the liquid crystal-containing layer to another object.

[0005]

[Function] An aqueous solution containing a thixotropic liquid crystal material,
As described above, the technique of highly accurately applying a coating having a thickness of several μm or more or an appropriate thickness is extremely difficult as a mass production means even though it is experimentally possible. On the other hand, in the present invention, by using the electrophoretic technique for coating the liquid crystal material, various liquid crystal members having a thick and uniform liquid crystal coating thickness can be easily provided with good yield.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the preferred embodiments. The electrical coating method used in the present invention is to form a coating film by electrically depositing a coating film forming material dissolved or dispersed in an aqueous solution on the main electrode plate (electrodeposition electrode) surface. As a similar technique which is practically used in such an electric coating method, there is an electrodeposition coating method of coating a metal plate with a paint, which is a method of dispersing a coloring pigment in a polymer solution to form a member for coating. As a main electrode plate, it is well known as a method of coloring and coating the member. In addition, the electrodeposition coating includes cation electrodeposition and anion electrodeposition depending on the ionic reaction depending on the polarity of the main electrode, and is classified depending on whether the electrodeposit material behaves as a cation or as an anion.

In the conventional electrodeposition coating, in order to firmly form a colored film containing a pigment, a polymeric material is cured by post-coating heat treatment or the like to increase the film strength and is put to practical use. The electrodeposition liquid used in the method of the present invention contains a liquid crystal material that is finely emulsified and dispersed in a binder aqueous solution, and differs from conventional electrodeposition coating methods in which pigments are dispersed in many points, I haven't seen any precedent yet. However, in the present invention, since the liquid crystal material finely dispersed in the binder solution can behave as a cation or anion, it has been found that electrodeposition can be made possible by the same principle. However, since the film strength of the formed film itself is not so necessary, it is not necessary to intensely cure the polymer material as the binder after coating,
If the treatment is carried out to such an extent that the solvent is completely removed, then the object of the present invention can be sufficiently achieved.

The liquid crystal material finely dispersed in the binder solution may be oil droplets of liquid crystal itself, or may be microcapsulated by various capsule wall materials. From the binder solution in which the liquid crystal material is finely dispersed, several methods can be adopted for electrodeposition laminating the liquid crystal material on the surface of the electrode plate which is the coating substrate.
The following method is mentioned as a preferable method. (1) A method of coprecipitating liquid crystal oil droplets or a capsule member on the main electrode surface in association with the electrodeposition behavior of the electrodepositable polymer substance (similar to electrodeposition coating). (2) A method of allowing the capsule wall material to have ionic dissociation property. (3) A method of imparting an apparent ion dissociation property by adsorbing an ion dissociative substance on the surface of the liquid crystal oil droplets or the capsule wall film material. (4) A method of encapsulating the capsule in a polymer micelle and oxidizing it on the counter electrode surface to release the capsule to the electrode surface (the micelle serves as a capsule carrier). (5) A method in which the capsule is dispersed in an electrically insulating solvent, a contact charge is generated on the surface of the capsule, and the surface of the counter electrode is electrophoresed.

The electrodeposition liquid used in the present invention comprises a medium and a liquid crystal material finely dispersed therein, and it is easy to finely disperse (emulsify) liquid crystal oil droplets or an encapsulated product thereof in the medium. .. For example, in accordance with a general emulsion preparation method, liquid crystal oil droplets or an encapsulated product thereof is mixed in an aqueous solution in the presence of a suitable emulsifier, and strong mechanical stirring or ultrasonic stirring, or other means of liquid crystal oil droplets or its An emulsion of the encapsulated product can be prepared. Further, a water-soluble polymer substance (for example, polyvinyl alcohol) coexisting as a binder may promote emulsion stably. The principle of emulsifying and dispersing a hydrophobic liquid material such as a liquid crystal material in an aqueous solution is
It is to stably exist around the oil droplets by the polar group coordination of an emulsifier or a coexisting water-soluble polymer substance. This principle is well known and widely used industrially, so detailed description is omitted. To do.

As the liquid crystal microencapsulation method, the general microencapsulation technique applied to other materials can be used as it is. General microencapsulation methods include chemical fabrication methods, physicochemical fabrication methods, and physical
There is a mechanical manufacturing method. Chemical preparation methods include interfacial polymerization method using synthetic reaction, in situ polymerization method, and in-liquid curing coating method that causes physical property change of polymer. The interfacial polymerization method is a method in which a water-soluble monomer and an oil-soluble monomer are selected as two kinds of monomers that undergo polycondensation or polyaddition reaction, and either one is dispersed and reacted at the interface. in situ
The polymerization method is a method in which a reactant (monomer or initiator) is supplied from one of the inside and the outside of the core material to cause the reaction on the surface of the capsule wall film. The in-liquid hardening coating method (orifice method) is a method of encapsulating a core material with a wall film material in advance and then hardening the wall film in a hardening liquid. As the physicochemical preparation method, there are a coacervation method using phase separation, an interfacial precipitation method (in-liquid concentration method, in-liquid drying method, secondary emulsion method), and a melt dispersion method.

The coacervation method can be used in either an aqueous solution system or an organic solvent system. In an aqueous solution system, a simple coacervation method in which phase separation is caused by a decrease in solubility and a complex coacervation method in which phase separation is caused by an electrical interaction can be used. The organic solvent system utilizes the phase separation phenomenon due to changes in solubility and temperature. The interfacial precipitation method is a method capable of encapsulation under mild conditions without violent reaction or rapid pH change. For example, an aqueous solution in which a liquid crystal core material is dispersed is dispersed in a solvent solution of a hydrophobic polymer. After that, it is further dispersed in a protective colloid solution. The melt dispersion method uses a wax-like substance such as wax or polyethylene as a wall film material, and is a method in which a core material is dispersed in a liquid together with the wax-like substance under heating and then cooled.

Spraying as a physical / mechanical manufacturing method
Drying method, air suspension coating method, vacuum deposition coating method, etc. can be mentioned, but since the liquid crystal that is the core material is a liquid at room temperature and it is premised that an emulsion that adjusts its size is prepared, the preparation of liquid crystal capsules. Not legal as a law. The electrophoretic emulsified liquid crystal solution or capsule dispersion solution used in the present invention can be prepared by applying the various basic liquid crystal emulsified oil drop methods and encapsulation methods described above. It is necessary to properly select the characteristics of the liquid crystal emulsion or the capsule dispersion solution depending on how to electrically migrate, and the characteristics shown in the above (1) to (5) are used under those characteristics. Thus, an electrodeposition laminated coating layer is formed on the surface of the main electrode plate which is the coating substrate. The methods are outlined below.

(1) Co-deposition method of liquid crystal material by electrodepositable polymer substance: When a polymer substance is electrodeposited from a solution of electrodepositable polymer substance, coexisting finely dispersed liquid crystal oil droplets or encapsulated liquid crystals are formed. By the method of co-electrodeposition on the electrode plate surface, the polymer material to be electrodeposited serves as a binder for the liquid crystal material to stabilize the coating film (see electrodeposition coating). As the organic polymer substance used for electrodeposition, various substances such as natural resin type, synthetic oil type, alkyd resin type, ester resin type, acrylic resin type and epoxy resin type can be used. Since the polymer material for electrodeposition serves as a matrix polymer of the polymer dispersion type liquid crystal display device, it is necessary that it has excellent optical properties, electrical properties and durability. In particular, the matrix polymer must be optically transparent, and acrylic resins and vinyl resins are preferred. The refractive index of the matrix polymer needs to be close to the refractive index of the polymer encapsulating the liquid crystal, and it is preferable that both the matrix polymer and the encapsulating polymer have a refractive index of 1.3 to 1.7.
Further, an acrylic resin is preferably used from the viewpoint of weather resistance.

Such an acrylic resin must have an ion dissociative function from the viewpoint of electrodeposition and dispersion of liquid crystals or liquid crystal capsules, and is obtained by copolymerizing with a monomer having an ion dissociative group. Be done. Representative dissociative groups include carboxylic acid groups and sulfonic acid groups. Examples of the monomer having an ion dissociative group include (meth) acrylic acid, styrenesulfonic acid, 2-sulfoethyl (meth) acrylate, ω-carboxy-polycaprolactone mono (meth) acrylate, monohydroxyethyl phthalate (meth) acrylate, and amber. An acid monohydroxyethyl (meth) acrylate etc. are mentioned. These may be copolymerized with any acrylic monomer or any vinyl monomer in an appropriate ratio.

Preferred examples of comonomers include glycidyl (meth) acrylate, normal-butyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth). Acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, cetyl (meth) acrylate, pentadecyl (meth) acrylate, stearyl (meth) acrylate, behenyl (meth) acrylate, hydroxypropyl mono ( (Meth) acrylate, polyethylene glycol mono (meth) acrylate, methoxyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate Over DOO, polyethylene glycol - polypropylene glycol mono (meth) acrylate, polyethylene glycol - polytetramethylene glycol mono (meth) acrylate, polypropylene glycol - polytetramethylene glycol mono (meth) acrylate, (iso) octyl (meth) acrylate,
(Iso) nonyl (meth) acrylate, (iso) propyl (meth) acrylate, phenylcarbitol (meth) acrylate, nonylphenylcarbitol (meth) acrylate, nonylphenoxypropyl (meth)
Acrylate, dicyclopentynyloxyethyl (meth) acrylate, polycaprolactone (meth) acrylate, 2-hydroxy-3-phenoxy (meth) acrylate, tertiary butylcyclohexyl (meth)
Examples thereof include acrylate, styrene, α-methylstyrene, vinyl acetate and vinylpyrrolidone.

Maleated oil-based and polybutadiene-based resins have long been known as anion type resins, and the curing of the resin is based on an oxidative polymerization reaction. Therefore, there is a feature that the resin cures when left in the air. The cation type is widely used for general electrodeposition coating, and many epoxy resin types are used alone or modified. An isocyanate crosslinking agent is often used for curing. In addition, there are many so-called polyamino resin resins such as polybutadiene resin, melamine resin, and acrylic resin. There are oxidative polymerization, thermal polymerization, photo-crosslinking curing method, etc. depending on the property of the polymer substance used to cure the organic polymer film electrodeposited with the liquid crystal material, and the liquid crystal material is stably applied to the main electrode plate surface. It has a fixed role. (2) Ion-dissociative capsule method: When a chemical preparation method is used, the liquid crystal capsule itself can be made to possess ion-dissociative property by using a monomer having an ion-dissociative group or an initiator. In the case of the interfacial polymerization method, the ion dissociative group can be introduced into the capsule wall film by using a material having the ion dissociative group in an aqueous solution. in s
Also in the case of the in situ polymerization method, an ionic surfactant having radical reactivity may be used and polymerization may be carried out with a water-soluble polymerization initiator such as potassium persulfate which is a dispersion medium. Further, regarding the physicochemical production method, an ionic dissociable capsule can be obtained by previously introducing an ionic dissociative group into the wall membrane material in the coacervation method or the interfacial precipitation method.

The cation or anion ion-dissociable capsules dispersed in the aqueous solution are oxidized or reduced on the electrode surface having a polarity opposite to that of the capsule, and the ions are electrodeposited on the electrode surface to form the coating film of the liquid crystal capsule. Form. (3) Method of adsorbing ion dissociative substance on liquid crystal oil droplet or capsule wall film surface: Adsorb an ion dissociative substance on the surface of liquid crystal oil droplet or capsule wall film already formed, The behavior can be made. That is,
When using physical adsorption, a polymer having an ionic surfactant or an ion dissociative group as an ion dissociative substance, for example, a copolymer containing (meth) acrylic acid, styrene sulfonic acid, etc., is used as a protective colloid. Good.
This protective colloid is basically the same as the structure of the copolymer shown in the above-mentioned (1) co-deposition method, but can act as a protective colloid depending on the copolymer composition and the blending amount of the neutralizing agent. .. When chemical adsorption is used, a material having a functional group such as a carboxyl group or an amino group is used as the material for the capsule wall film, and it is obtained by introducing and adding an ion dissociative substance having reactivity with them. You can These methods are effective for liquid crystal oil droplets that originally cannot be introduced with an ion-dissociable group, or when it is difficult to directly introduce an ion-dissociable group into the wall film material when encapsulating.

(4) Micelle transport method for capsules: In this method, it is not necessary to employ a special encapsulation method,
Basically, a liquid crystal and a protective colloid having an ionic surfactant or an ion dissociative group may be dispersed in water.
However, it is generally necessary to miniaturize the capsule particles. In this method, when an organic pigment is dispersed in an aqueous surfactant solution and the surfactant is electrochemically oxidized on the electrode substrate, the dispersed pigment aggregates and precipitates to form a pigment thin film on the electrode surface. And is named the micelle electrolysis method (Reference: JP-A-48-26825, JP-A-63-243298, Tetsuo Saji, Surface Vol.30 No.4 (1
991). Chem. Lett., 693 (1988). Bull. Chem. Soc. Jan.,
Vol62, 2992 (1989). Electrochem. Soc., Vol.136. 2953
(1989). J. Am. Chem. Soc., Vol 103, 450 (1991). Etc.). This method is established by substituting a liquid crystal capsule for an organic pigment by applying the micelle electrolysis method.

When a ferrocene-containing nonionic surfactant (commercially available) is added to an aqueous solution containing fine capsules,
Capsules can be well dispersed. This is because the capsule can be incorporated into the micelle structure formed by the surfactant (or adsorbed on the surface of the capsule wall film) and can be dispersed in a complete aqueous solution. When the main electrode substrate is placed in this aqueous solution and electrolyzed under the oxidation potential, the micelles are oxidized and the surfactant adsorbed on the capsule surface is desorbed. At this time, the capsules cannot maintain the dispersed state and aggregate and settle on the surface of the main electrode. The oxidized surfactant is attracted to the opposite electrode and reduced, and the original active state in which micelles can be formed is restored. Therefore, since the behavior of the surfactant is cyclically performed, it is as if the micelle were transporting the capsule. According to this method, a dense and high-quality capsule film can be formed, but a drawback is that it takes a long time to obtain a desired film thickness (for example, 10 μm). In addition, liquid crystal oil droplets cannot be used because the binder cannot be present after electrodeposition and therefore a film cannot be formed.

(5) Electrophoresis method of charged capsules: Generally, particles dispersed in an electrically insulating solvent generate a constant contact potential due to the correlation between the solvent and the particles. This principle is a well-known phenomenon used in liquid development methods in electrophotography and electrostatic printing. Using this principle, it is possible to form a coating film by electrophoresis of liquid crystal capsules. The charged capsules may be formed by microencapsulating a liquid crystal material by a general method and performing solvent substitution with an electrically insulating solvent, mixing an ion dissociative substance in the capsule core material, or imparting ion dissociation property. In the latter case, when an ion-dissociative substance is mixed in the liquid crystal liquid, which is the core material, the wall membrane has semi-permeability, and therefore counter ions can be emitted to the outside of the capsule. An electric double layer is formed and charges are generated on the capsule surface. However, the coexistence of the liquid crystal and the ion-dissociative substance is not preferable (the mechanism of electrostatic charge generation is often opaque and cannot be fully theoreticalized).

In any case, since the capsules in the electrically insulating solvent exist as charged particles, they can migrate to the electrode surface having an electric charge opposite to the electric charge to electrostatically form a film. As is clear from the above description, liquid crystal oil droplets or liquid crystal microcapsules suitable for each electrodeposition (electrodeposition) are prepared, and the liquid crystal material is applied onto an appropriate electrode member which is a coating substrate. Electrolytically adsorbed or electrochemically deposited by reaction,
A high-performance polymer-dispersed liquid crystal film coating film required for a liquid crystal panel can be stably formed. In the actual manufacture of a panel used for a liquid crystal display, since the display area of the panel is made of ITO or other conductive material, if the panel is directly used as a main electrode for liquid crystal material electrodeposition, the panel surface A polymer dispersed liquid crystal material having a film thickness necessary for the above can be formed by coating. The state of the liquid crystal in this case is in the form of oil drops, capsules, continuous irregular shapes, or the like.

When an ITO film is used as a main electrode for electrodeposition, a cation type neutralizing agent changes the surface crystal at the time of electrodeposition to form a blackish brown opaque substrate having a high resistance value, and therefore an anion type is used. Is preferred. When the cation type is used, it is necessary to provide a transparent and extremely thin protective layer on the surface of the ITO film. Also, a conductive substrate for electrodeposition not used for the panel (may be patterned if necessary)
After forming a suitable coating film of the liquid crystal material, the liquid crystal containing layer may be transferred to a predetermined position on the surface of another panel member. According to this method, the anion type electrodeposition method can be used, and the width of the electrodeposition resin that can be selected is expanded. In addition, only good coatings can be selectively formed into panels, and it is not necessary to prepare electrical wiring for electrodeposition on the panel surface one by one, and electrodeposition substrates can be used repeatedly. There are many advantages such as being able to carry out a simple and rational process.

[0023]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. In addition, unless otherwise specified, “parts” and “%” in the text are based on weight. Example 1 Anionic acrylic resin 55 parts, ethyl cellosolve 15
Liquid crystal material for PDLC (Product No. BL) in an acrylic resin aqueous solution consisting of 1 part, isopropyl alcohol 3 parts, triethylamine (neutralizing agent) about 1 part, and pure water 1,000 parts.
(009: manufactured by Merck Ltd.) was added and an emulsion of liquid crystal was prepared under vigorous stirring. This emulsion was put in an electrodeposition bath, a platinum plate was used as the negative electrode, and an I electrode was used as the main electrodeposition electrode for the positive electrode.
Using a glass plate for a panel on which a TO transparent conductive film was formed, electrodeposition was performed at room temperature and a voltage of 20 to 60 V for an appropriate time.
A polymer dispersed liquid crystal film having a thickness of μm was formed. Then, the glass plate for a panel was pulled up and dried at about 50 ° C., and finally a white polymer dispersed liquid crystal film having a thickness of 8 μm was formed. Another conductive transparent substrate was overlaid and adhered to the liquid crystal film surface of this panel, and when a DC voltage of 20 V was applied, the liquid crystal film became transparent, and when the voltage application was cut off, it returned to white, so polymer dispersion It was confirmed that the mold liquid crystal film was formed.

Example 2 55 parts of cationic acrylic resin, 15 parts of ethyl cellosolve
Part, isopropyl alcohol 3 parts, acetic acid (neutralizing agent) about 1
And 10 parts of pure water, 10 parts of a liquid crystal material for PDLC (Product No. BL009: manufactured by Merck Ltd.) was added to an acrylic resin aqueous solution to prepare an emulsion of liquid crystal under vigorous stirring. This emulsion was put in an electrodeposition bath, a platinum plate was used as the positive electrode, and a 0.1 mm thick stainless steel plate having a smooth surface was used as the main electrode for the negative electrode. An electrodeposited region pattern of a liquid crystal material was previously formed on the main electrode plate surface with an electrically insulating photoresist by a conventional method. Next, a commercially available silicone resin liquid used for peeling was sufficiently diluted and immersed to form a thin peeling layer that did not affect electrodeposition. Using this main electrode, a polymer dispersed liquid crystal film having a thickness of 10 μm was formed according to the previous example. On the other hand, a photosensitive acrylic resin adhesive was spin-coated to a thickness of 0.3 μm on the ITO film surface of a glass substrate having an ITO transparent conductive layer having the same pattern as the main electrode to form a polymer-dispersed liquid crystal film-formed main film. Align the electrode plate with the ITO film pattern on the glass surface and make close contact with it, and then press-bond it evenly with a rubber roller from the back surface,
The main electrode was peeled off and the electrodeposited polymer-dispersed liquid crystal film was transferred to the glass surface. After the transfer to the glass surface, the above test was conducted to confirm that the object of the present invention was achieved.
Also, the main electrode could be used repeatedly.

Example 3 A ferrocene derivative-based nonionic micellizing agent (surfactant: ferrocenyl PEG, manufactured by Dojindo Chemical Co., Ltd.) was added to an aqueous solution in which capsules containing liquid crystal, which will be described later, are dispersed (3 mM / 1000 ml) and thoroughly ultrasonically stirred to prepare a dispersion. Then, the glass plate with the ITO film of Example 1 was used as the main electrode, the platinum plate was used as the counter electrode, the saturated carmelo electrode was used as the reference electrode, and LiBr was used as the supporting electrolyte.
(0.05mM) is added to make an electrolytic solution, voltage + 0.9V
Electrolysis was performed for 1 hour to form a liquid crystal capsule film on the ITO film surface. The capsules used above were manufactured as follows. 10 parts of polymethylene polyphenylisocyanate (Millionate MR-400) was dissolved in 50 parts of nematic liquid crystal (E-44, manufactured by Merck Limited). Then, it was added to a polyoxyethylene octadecylamine (Nymeen S-215, manufactured by NOF CORPORATION) aqueous solution containing diethylenetriamine, and ultrasonically dispersed. This emulsion solution was left at 60 ° C. for 5 hours to produce liquid crystal microcapsules.

Example 4 Nematic liquid crystal (E-44, manufactured by Merck Limited)
A solution of 5 parts styrene and 1 part divinylbenzene dissolved in 20 parts was used as a reactive surfactant New Frontier A.
229E (Daiichi Kogyo Seiyaku Co., Ltd.) 1 part and cationic reactive surfactant New Frontier C-1615 (Daiichi Kogyo Seiyaku Co., Ltd.) 0.3 part were dissolved in 2,000 parts of pure water. It was added and ultrasonic dispersion was performed. Next, the temperature was maintained at 50 ° C. under a nitrogen stream, 0.01 parts of potassium persulfate and 0.01 parts of sodium hydrogen sulfite were added, and static polymerization was performed for 6 hours to prepare ionized capsules (cationic). It was found that this emulsion can be used for electrodeposition in the same manner as in Example 1 to form a polymer-dispersed liquid crystal film, and electrodeposition coating by reaction addition of an ion dissociative substance is possible.

[0027]

[Effect] According to the method of the present invention as described above, a polymer dispersion type (capsule type) liquid crystal panel, which has been conventionally difficult to be applied satisfactorily, is provided with technical elements such as electrodeposition (or electrodeposition) and electrophoresis. It can be easily and easily manufactured by using it.
Another advantage of the method of the present invention is that a large-sized liquid crystal display or a patterned liquid crystal display can be manufactured stably and easily, so that an inexpensive display can be provided.

Claims (5)

[Claims] 1. An electrodeposition coating method using a polymer binder solution, wherein the binder solution contains a liquid crystal material finely dispersed in the solution, and a main electrode and a counter electrode serving as coating substrates are arranged in the solution. Then, the finely dispersed liquid crystal material is electrically adsorbed or electrochemically deposited on the entire surface or an arbitrary area of the coated substrate, and then the coated substrate is taken out and the solvent is dried and removed. Application method. 2. The coating method according to claim 1, wherein the liquid crystal material is emulsified with a surfactant. 3. The coating method according to claim 1, wherein the liquid crystal material is microencapsulated. 4. The coating method according to claim 1, wherein the liquid crystal material is electrophoretic. 5. A method for manufacturing a liquid crystal member according to claim 1, wherein the liquid crystal containing layer formed on the coated substrate is transferred to another object.