JPH0359515A - Liquid crystal combined film - Google Patents
Liquid crystal combined filmInfo
- Publication number
- JPH0359515A JPH0359515A JP19392189A JP19392189A JPH0359515A JP H0359515 A JPH0359515 A JP H0359515A JP 19392189 A JP19392189 A JP 19392189A JP 19392189 A JP19392189 A JP 19392189A JP H0359515 A JPH0359515 A JP H0359515A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polyisocyanate
- water
- soluble polymer
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 71
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 15
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009835 boiling Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 12
- 238000004132 cross linking Methods 0.000 claims abstract description 5
- 230000001804 emulsifying effect Effects 0.000 claims abstract description 3
- 239000012528 membrane Substances 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 230000006866 deterioration Effects 0.000 abstract description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 4
- 125000005442 diisocyanate group Chemical group 0.000 abstract description 2
- 229940057995 liquid paraffin Drugs 0.000 abstract description 2
- 229920001451 polypropylene glycol Polymers 0.000 abstract description 2
- CDKDZKXSXLNROY-UHFFFAOYSA-N octylbenzene Chemical compound CCCCCCCCC1=CC=CC=C1 CDKDZKXSXLNROY-UHFFFAOYSA-N 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 17
- 229920000642 polymer Polymers 0.000 description 11
- 239000000758 substrate Substances 0.000 description 10
- 230000005684 electric field Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 4
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- WLPATYNQCGVFFH-UHFFFAOYSA-N 2-phenylbenzonitrile Chemical group N#CC1=CC=CC=C1C1=CC=CC=C1 WLPATYNQCGVFFH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- VXNSQGRKHCZUSU-UHFFFAOYSA-N octylbenzene Chemical compound [CH2]CCCCCCCC1=CC=CC=C1 VXNSQGRKHCZUSU-UHFFFAOYSA-N 0.000 description 3
- JGWWBSUUFGBHCH-UHFFFAOYSA-N 2-phenylpyrimidine-4-carbonitrile Chemical compound N#CC1=CC=NC(C=2C=CC=CC=2)=N1 JGWWBSUUFGBHCH-UHFFFAOYSA-N 0.000 description 2
- VQAOGHCFFZEABS-UHFFFAOYSA-N 3-phenylpyrazine-2-carbonitrile Chemical compound N#CC1=NC=CN=C1C1=CC=CC=C1 VQAOGHCFFZEABS-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000000807 solvent casting Methods 0.000 description 2
- 239000005264 High molar mass liquid crystal Substances 0.000 description 1
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001000 anthraquinone dye Substances 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐水性に優れた多孔質膜を用いた液晶複合膜
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal composite film using a porous film with excellent water resistance.
本発明で得られる液晶複合膜は、電圧や熱により光の透
過量を制御する液晶表示装置として用いることができる
。The liquid crystal composite film obtained by the present invention can be used as a liquid crystal display device that controls the amount of light transmitted by voltage or heat.
近年、ポリマー分散型液晶といわれる、新規な液晶膜技
術が開発され、フィルム状の大面積の光シャッタや、大
面積のデイスプレィ部材としての利用が進んでいる。In recent years, a new liquid crystal film technology called polymer-dispersed liquid crystal has been developed, and its use is progressing in film-like large-area optical shutters and large-area display members.
ｉｔ異方性が正で、正常の屈折率が、ポリマーの屈折率
とほぼ等しい液晶を用いて作成したポリマー分散型液晶
層を二枚の電極基板で挟んだ場合、電界ＯＦＦ状態では
光を散乱し、電界ＯＮ状態では光を透過させることが可
能となる。When a polymer-dispersed liquid crystal layer made using a liquid crystal with positive anisotropy and a normal refractive index approximately equal to the refractive index of the polymer is sandwiched between two electrode substrates, light will be scattered in the electric field OFF state. However, when the electric field is ON, light can be transmitted.
ポリマー分散型液晶としては、液晶微粒滴を水溶性ポリ
マーでカプセル状に包含したＮＣＡＰ（Ｎｅｍａｔｉｃ
Ｃｕｒｖｉｌｉｎｅａｒ Ａｌｉｇｎｅｄ Ｐｈａｓ
ｅ：ネマチック曲線式整列相）液晶（特公表昭５８−５
０１６３１号公報）、ラテックス取り込み液晶（特開昭
６０−２５２６８７号公報）、液晶微小滴をエポキシ樹
脂中に分散した物質（特公表昭６１−５０２１２８号公
報）、あるいは溶媒キャスト法により調製した網目構造
の液晶複合膜（Ｐｏｌｙｍｅｒ Ｐｒｅｐｒｉｎｔｓ、
Ｊａｐａｎ ｖｏｌ、３７＋Ｎｏ、８＋２４５０（１９
８８） ３等が知られている。As a polymer-dispersed liquid crystal, NCAP (Nematic
Curvilinear Aligned Phas
e: Nematic curve type aligned phase) liquid crystal (Special publication 1985-5)
01631), latex-incorporated liquid crystal (Japanese Unexamined Patent Publication No. 60-252687), a material in which liquid crystal microdroplets are dispersed in epoxy resin (Japanese Unexamined Patent Publication No. 61-502128), or a network structure prepared by a solvent casting method. liquid crystal composite film (Polymer Preprints,
Japan vol, 37+No, 8+2450 (19
88) 3rd class is known.
前記特公表昭５８−５０１６３１号公報に記載されてい
るような水溶性ポリマーを用いて得られるＮＣＡＰ液晶
は、コントラストは良好だがポリマーが吸湿性のため、
電気的特性の長期の安定性に問題がある。NCAP liquid crystal obtained using a water-soluble polymer as described in the above-mentioned Japanese Patent Publication No. 58-501631 has good contrast, but because the polymer is hygroscopic,
There are problems with long-term stability of electrical characteristics.
一方、特開昭６０−２５２６８７号公報に記載された方
法では、ポリマーと液晶とを有機溶媒に溶解した溶液を
基板上に展開し、溶媒を蒸発除去するため、液晶組成物
中の低沸点成分が蒸発し液晶の組成が°変化するという
問題点がある。On the other hand, in the method described in JP-A-60-252687, a solution in which a polymer and a liquid crystal are dissolved in an organic solvent is spread on a substrate, and the solvent is evaporated and removed. There is a problem in that the liquid crystal composition evaporates and the composition of the liquid crystal changes.
また特公表昭６１−５０２１２８号公報記載のエポキシ
樹脂モノマーや、紫外線硬化樹脂モノマーと液晶との混
合物を基板間に挟み、重合、硬化させ液晶を相分離させ
てポリマー中に分散させて得られたポリマー分散型液晶
、あるいは溶媒キャスト法により調整した液晶複合膜に
おいては、液晶の一部が、ポリマー中にごく微小滴（径
が０．５μｍ以下）の状態で分散され、この液晶は、通
常の電界では応答しないため電界ＯＮ時のＯＦＦ時に対
する比（以下コントラスト比と略記する）が不十分であ
り、光の透過吸収機能を十分に発揮しないばかりでなく
、電界ＯＮ時の透過光量も少なくなるという問題点があ
った。また例えば紫外線を使用した場合には液晶やコン
トラスト比を改善するために添加された二色性染料の劣
化が起こったりするなどの問題点があった。In addition, epoxy resin monomers described in Japanese Patent Publication No. 61-502128, or mixtures of ultraviolet curable resin monomers and liquid crystals are sandwiched between substrates, polymerized and cured, and liquid crystals are phase-separated and dispersed in the polymer. In polymer-dispersed liquid crystals or liquid crystal composite films prepared by solvent casting, part of the liquid crystal is dispersed in the polymer in the form of very small droplets (diameter of 0.5 μm or less), and this liquid crystal is Since it does not respond to an electric field, the ratio when the electric field is ON compared to when the electric field is OFF (hereinafter abbreviated as contrast ratio) is insufficient, and not only does the light transmission and absorption function not fully demonstrate, but also the amount of transmitted light when the electric field is ON is small. There was a problem. Furthermore, for example, when ultraviolet light is used, there are problems such as deterioration of the liquid crystal and dichroic dye added to improve the contrast ratio.
さらに、二色性染料を液晶と共に使用した場合、前記し
たいずれの方法においても、二色性染料を溶かした液晶
の一部が、ポリマー中にごく微小滴の状態で分散され、
この液晶及び二色性染料は、通常の電界では応答しない
ため前記と同様の問題点が生じていた。Furthermore, when a dichroic dye is used together with a liquid crystal, in any of the methods described above, a portion of the liquid crystal in which the dichroic dye is dissolved is dispersed in the polymer in the form of very small droplets.
These liquid crystals and dichroic dyes do not respond to a normal electric field, resulting in the same problems as described above.
本発明は、上記問題点を解決した液晶複合膜に関する。 The present invention relates to a liquid crystal composite film that solves the above problems.
本発明は、水溶性ポリマー水溶液と過剰のポリイソシア
ナートとの混合物、または水溶性ポリマー水溶液、ポリ
イソシアナート及び高沸点化合物の混合物を乳化、架橋
させた後、未反応のポリイソシアナートまたは高沸点化
合物を除去して得られた耐水性の多孔質膜に液晶を含浸
させてなることを特徴とする液晶複合膜に関する。The present invention emulsifies and crosslinks a mixture of a water-soluble polymer aqueous solution and excess polyisocyanate, or a mixture of a water-soluble polymer aqueous solution, polyisocyanate, and a high-boiling point compound, and then removes unreacted polyisocyanate or a high-boiling point compound. The present invention relates to a liquid crystal composite membrane characterized by impregnating a water-resistant porous membrane obtained by removing a compound with liquid crystal.
本発明で使用する水溶性のポリマーとしては、ポリビニ
ルアルコール、ポリプロピレングリコールが好適である
。As the water-soluble polymer used in the present invention, polyvinyl alcohol and polypropylene glycol are suitable.
また本発明で使用するポリイソシアナートの具体例とし
て′Ｇよ、ヘキサメチレンジイソシアナートのようなジ
イソシアナート、〔○ＣＮ （ＣＨ２）６〕、Ｎ のよ
うなトリイソシアナートが使用される。Specific examples of polyisocyanates used in the present invention include diisocyanates such as 'G', hexamethylene diisocyanate, and triisocyanates such as [○CN (CH2)6] and N2.
本発明で使用する高沸点化合物としては、架橋時に揮発
しにくいものが好ましく、例えば流動パラフィン、オク
チルベンゼン等を好適に挙げることができる。The high boiling point compound used in the present invention is preferably one that does not easily volatilize during crosslinking, such as liquid paraffin, octylbenzene, and the like.
本発明の液晶複合膜は例えば以下のような方法により製
造することができる。The liquid crystal composite film of the present invention can be manufactured, for example, by the following method.
水溶性ポリマー水溶液と過剰のポリイソシアナートとの
混合物、または水溶性ポリマー水溶液、ポリイソシアナ
ート及び高沸点化合物からなる混合物を乳化後、基板に
塗布し、水を蒸発して得た膜を加熱により架橋させ、耐
水性を付与した後、メタノール、アセトン、ヘキサンの
ような低沸点溶剤で前記高沸点化合物及び未反応のポリ
イソシアナートを抽出、除去することによって耐水性の
多孔質膜が得られる。水溶性ポリマーに対するポリイソ
シアネートや高沸点化合物の混合割合を適宜選定するこ
とにより、所望の空隙率、平均孔径を有する多孔質膜を
製造することができる。After emulsifying a mixture of a water-soluble polymer aqueous solution and excess polyisocyanate, or a mixture consisting of a water-soluble polymer aqueous solution, polyisocyanate, and a high-boiling point compound, it is applied to a substrate, and the film obtained by evaporating water is heated. After crosslinking and imparting water resistance, a water resistant porous membrane is obtained by extracting and removing the high boiling point compound and unreacted polyisocyanate with a low boiling point solvent such as methanol, acetone, or hexane. By appropriately selecting the mixing ratio of polyisocyanate and high boiling point compound to the water-soluble polymer, a porous membrane having a desired porosity and average pore diameter can be produced.
この方法により得られる多孔質膜を液晶複合膜として用
いる場合には、空隙率が５０〜８０％、空隙部の平均孔
径としては、１〜５μｍ程度のものが好適である。When the porous membrane obtained by this method is used as a liquid crystal composite membrane, it is preferable that the porosity is 50 to 80% and the average pore diameter of the pores is about 1 to 5 μm.
本発明の液晶複合膜に、前記多孔質膜を使用して以下の
ような方法により製造することができる。The liquid crystal composite film of the present invention can be manufactured by the following method using the porous film.
前記多孔質膜に、液晶、あるいは二色性染料を溶解した
液晶をｌ〜７６０ｍｍＨｇ程度の減圧下に含浸させる。The porous membrane is impregnated with a liquid crystal or a liquid crystal in which a dichroic dye is dissolved under reduced pressure of about 1 to 760 mmHg.
含浸させる際には液晶等が劣化しない程度に加温して流
動性を高めることが好ましい。When impregnating, it is preferable to increase fluidity by heating to an extent that the liquid crystal etc. do not deteriorate.
本発明によれば、液晶、あるいは二色性染料及び液晶が
前記多孔質膜の空隙部にのみ充填された液晶複合膜が得
られる。According to the present invention, a liquid crystal composite membrane can be obtained in which only the voids of the porous membrane are filled with liquid crystal or dichroic dye and liquid crystal.
本発明において使用される液晶としては、特に限定され
ないが、好ましくはシアノビフェニル系、シアノフェニ
ルピリミジン系、シアノフェニルピラジン系液晶等の誘
電異方性が大きく、かつ屈折率異方性の大きなネマチッ
ク液晶が使用される。The liquid crystal used in the present invention is not particularly limited, but preferably nematic liquid crystals with large dielectric anisotropy and large refractive index anisotropy such as cyanobiphenyl, cyanophenylpyrimidine, and cyanophenylpyrazine liquid crystals. is used.
特に屈折率異方性や誘電異方性の大きいシアノフェニル
ピリミジン系液晶及び／またはシアノフェニルピラジン
系液晶をシアノビフェニル系液晶に対して数重量％程度
、好ましくは５重量％以上添加した液晶混合物を多孔質
膜中の連通ずる空隙部に含浸させて得られた液晶複合膜
から液晶表示装置を作製した場合、コントラスト比が良
好であり、また二色性染料を使用する場合、その溶解性
が大きいため、低温下でも染料の析出がなく、優れたコ
ントラスト比を維持することができる。In particular, a liquid crystal mixture in which cyanophenylpyrimidine liquid crystal and/or cyanophenylpyrazine liquid crystal having large refractive index anisotropy and dielectric anisotropy is added to the cyanobiphenyl liquid crystal in an amount of about several percent by weight, preferably 5 percent by weight or more. When a liquid crystal display device is manufactured from a liquid crystal composite film obtained by impregnating the continuous voids in a porous film, the contrast ratio is good, and when a dichroic dye is used, its solubility is high. Therefore, there is no dye precipitation even at low temperatures, and an excellent contrast ratio can be maintained.
また本発明においてコントラストを高くするために二色
性染料を使用するのが好ましいが、その具体例としては
、アゾ系、アントラキノン系等の複数の二色性染料を適
当な割合に混合して得られる黒色二色性染料等を挙げる
ことができる。Further, in the present invention, it is preferable to use dichroic dyes in order to increase the contrast, and a specific example thereof is a dye obtained by mixing a plurality of dichroic dyes such as azo dyes and anthraquinone dyes in an appropriate ratio. Examples include black dichroic dyes.
以下に製造例を示し、図面を参照して未発明をさらに詳
細に説明する。Manufacturing examples will be shown below, and the invention will be explained in further detail with reference to the drawings.
製造例１
１０％ＰＶＡ水’ＲＨ２０ｇ、ヘキサメチレンジイソシ
アナート２．０ｇ、オクチルベンゼン５．０ｇを攪拌し
乳化した。９０μｍのドクターブレードを用いて透明電
極３ａが配設されたガラス基板２ａの！極面上に乳化液
を塗布、乾燥（５０″Ｃ，１時間）して、厚さ１５μｍ
の膜を形成した。エタノールでオクチルベンゼンを抽出
して、空隙率約６０％、平均孔径３μｍの多孔質膜を得
た。この多孔質膜を純水に浸漬したが、ポリマーの溶解
はみられなかった。Production Example 1 20 g of 10% PVA water'RH, 2.0 g of hexamethylene diisocyanate, and 5.0 g of octylbenzene were stirred and emulsified. The glass substrate 2a on which the transparent electrode 3a is arranged using a 90 μm doctor blade! Apply the emulsion on the polar surface and dry it (50″C, 1 hour) to a thickness of 15 μm.
A film was formed. Octylbenzene was extracted with ethanol to obtain a porous membrane with a porosity of about 60% and an average pore diameter of 3 μm. This porous membrane was immersed in pure water, but no dissolution of the polymer was observed.
次いでシアノビフェニル系液晶（Ｅ−４４；メルク・ジ
ャパン社製）に３．０重量％の黒色二色性染料（Ｓ−３
０１；三井東圧染料社製）を溶かした液晶を５ｍｍＨｇ
の減圧下に、前記多孔質膜上に垂らし多孔質膜中の連通
する空隙部にのみ液晶及び二色性染料を含浸、充填させ
て液晶複合膜４を得た。Next, 3.0% by weight of a black dichroic dye (S-3) was added to a cyanobiphenyl liquid crystal (E-44; manufactured by Merck Japan).
01; Liquid crystal (manufactured by Mitsui Toatsu Dye Co., Ltd.) dissolved at 5 mmHg
A liquid crystal composite membrane 4 was obtained by impregnating and filling only the communicating voids in the porous membrane with liquid crystal and dichroic dye by dropping them onto the porous membrane under reduced pressure.
次いで透明電極３ｂが配設された基板２ｂを前記基板２
ａの電極３ａ面と対向するように前記液晶複合膜４を挟
持し、余分の液晶を除去した後、基板周囲を接着剤でシ
ールし液晶表示装置１を作製した。第１図に該液晶表示
装置の縦断面図を示す。上下電極間に、交流電圧を印加
し透過光量の変化を調べた。５０■電圧印加時のコント
ラスト比は１８であった。Next, the substrate 2b on which the transparent electrode 3b is disposed is attached to the substrate 2.
The liquid crystal composite film 4 was sandwiched so as to face the electrode 3a surface of a, and after removing excess liquid crystal, the periphery of the substrate was sealed with an adhesive to produce a liquid crystal display device 1. FIG. 1 shows a longitudinal sectional view of the liquid crystal display device. An alternating current voltage was applied between the upper and lower electrodes to examine changes in the amount of transmitted light. The contrast ratio when a voltage of 50 µm was applied was 18.
製造例２
１０％ＰＶＡ水溶ｉ２０ ｇ、ヘキサメチレンジイソシ
アナート７．０ｇを攪拌し乳化した。９０μｍのドクタ
ーブレードを用いて透明電極３ａが配設されたガラス基
板２ａの電極面上に乳化液を塗布、乾燥（５０’Ｃ，３
０分）して、厚さ１５μｍの膜を形成した。エタノール
で未反応のへキサメチレンジイソシアナートを抽出して
、空隙率約６５％、平均孔径３μｍの多孔質膜を得た。Production Example 2 20 g of 10% PVA aqueous solution and 7.0 g of hexamethylene diisocyanate were stirred and emulsified. Using a 90 μm doctor blade, the emulsion was applied onto the electrode surface of the glass substrate 2a on which the transparent electrode 3a was disposed, and dried (50'C, 3
0 minutes) to form a film with a thickness of 15 μm. Unreacted hexamethylene diisocyanate was extracted with ethanol to obtain a porous membrane with a porosity of about 65% and an average pore diameter of 3 μm.
この多孔質膜を純水に浸漬したが、ポリマーの溶解はみ
られなかった。この多孔質膜を用いて製造例１と同様に
して液晶表示装置を作製した。５０Ｖ電圧印加時のコン
トラスト比は１８であった。This porous membrane was immersed in pure water, but no dissolution of the polymer was observed. A liquid crystal display device was produced in the same manner as in Production Example 1 using this porous film. The contrast ratio when a voltage of 50 V was applied was 18.
本発明の多孔質膜を使用した液晶複合膜は、三次元に架
橋された構造の多孔質膜中の連通ずる空隙部に、液晶、
または液晶及び二色性染料を含浸させて作製するため、
耐水性に優れ、しかも液晶、二色性染料の劣化、変質等
の問題がない。The liquid crystal composite membrane using the porous membrane of the present invention has liquid crystal,
Or to make it by impregnating it with liquid crystal and dichroic dye,
It has excellent water resistance, and there are no problems such as deterioration or deterioration of liquid crystals or dichroic dyes.
また本発明の液晶複合膜は、液晶、あるいは液晶及び二
色性染料がポリマー中に微小滴となって分散含有される
ことがなく、ポリマー中の連通する空隙部にのみ充填さ
れるため、この液晶複合膜を用いた液晶表示装置はコン
トラスト比が高い。In addition, in the liquid crystal composite film of the present invention, the liquid crystal or the liquid crystal and the dichroic dye are not dispersed and contained in the polymer as minute droplets, but are filled only into the communicating voids in the polymer. A liquid crystal display device using a liquid crystal composite film has a high contrast ratio.
第１図は本発明の液晶複合膜を用いて作製した液晶表示
装置の縦断面図である。
１：液晶表示装置、２ａ、２ｂ：基板、３ａ。
３ｂ：電極、４：液晶複合膜FIG. 1 is a longitudinal cross-sectional view of a liquid crystal display device manufactured using the liquid crystal composite film of the present invention. 1: Liquid crystal display device, 2a, 2b: Substrate, 3a. 3b: Electrode, 4: Liquid crystal composite film
Claims (1)
混合物、または水溶性ポリマー水溶液、ポリイソシアナ
ート及び高沸点化合物の混合物を乳化、架橋させた後、
未反応のポリイソシアナートまたは高沸点化合物を除去
して得られた耐水性の多孔質膜に液晶を含浸させてなる
ことを特徴とする液晶複合膜。After emulsifying and crosslinking a mixture of a water-soluble polymer aqueous solution and excess polyisocyanate, or a mixture of a water-soluble polymer aqueous solution, polyisocyanate, and a high boiling point compound,
A liquid crystal composite membrane comprising a water-resistant porous membrane obtained by removing unreacted polyisocyanate or high-boiling point compounds and impregnated with liquid crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193921A JP2567704B2 (en) | 1989-07-28 | 1989-07-28 | Liquid crystal composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1193921A JP2567704B2 (en) | 1989-07-28 | 1989-07-28 | Liquid crystal composite film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0359515A true JPH0359515A (en) | 1991-03-14 |
| JP2567704B2 JP2567704B2 (en) | 1996-12-25 |
Family
ID=16315957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1193921A Expired - Lifetime JP2567704B2 (en) | 1989-07-28 | 1989-07-28 | Liquid crystal composite film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567704B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342545A (en) * | 1992-03-06 | 1994-08-30 | Sharp Kabushiki Kaisha | Polymer dispersion type liquid crystal display element and reflection type liquid crystal display device |
| JPH06308466A (en) * | 1993-04-21 | 1994-11-04 | Nec Corp | Polymer liquid crystal composite film and liquid crystal optical element using the same |
| JPH06308465A (en) * | 1993-04-21 | 1994-11-04 | Nec Corp | Polymer liquid crystal composite film, its production and liquid crystal optical element using the same |
| US5394256A (en) * | 1991-10-30 | 1995-02-28 | Sharp Kabushiki Kaisha | Encapsulated liquid crystal in liquid crystal material where one liquid crystal has positive birefringence and dielectric anisotropy, the other has only one positive of birefringence and dielectric anisotropy |
| US5473450A (en) * | 1992-04-28 | 1995-12-05 | Sharp Kabushiki Kaisha | Liquid crystal display device with a polymer between liquid crystal regions |
| US5535026A (en) * | 1994-07-20 | 1996-07-09 | Sharp Kabushiki Kaisha | Liquid crystal display device with a polymer between liquid crystal regions made by a heating and cooling process |
| US5724110A (en) * | 1994-05-27 | 1998-03-03 | Sharp Kabushiki Kaisha | Liquid crystal panel and method for producing the same in which the seal section is formed from a mixture of liquid crystal and resin |
| US5784134A (en) * | 1994-02-23 | 1998-07-21 | Sharp Kabushiki Kaisha | Liquid crystal display device and a method of fabricating the device using transparent-electrodes as a photomask |
| JP2005512142A (en) * | 2001-12-13 | 2005-04-28 | ソニー インターナショナル （ヨーロッパ） ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of forming composite material |
-
1989
- 1989-07-28 JP JP1193921A patent/JP2567704B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394256A (en) * | 1991-10-30 | 1995-02-28 | Sharp Kabushiki Kaisha | Encapsulated liquid crystal in liquid crystal material where one liquid crystal has positive birefringence and dielectric anisotropy, the other has only one positive of birefringence and dielectric anisotropy |
| US5342545A (en) * | 1992-03-06 | 1994-08-30 | Sharp Kabushiki Kaisha | Polymer dispersion type liquid crystal display element and reflection type liquid crystal display device |
| US5473450A (en) * | 1992-04-28 | 1995-12-05 | Sharp Kabushiki Kaisha | Liquid crystal display device with a polymer between liquid crystal regions |
| JPH06308466A (en) * | 1993-04-21 | 1994-11-04 | Nec Corp | Polymer liquid crystal composite film and liquid crystal optical element using the same |
| JPH06308465A (en) * | 1993-04-21 | 1994-11-04 | Nec Corp | Polymer liquid crystal composite film, its production and liquid crystal optical element using the same |
| US5784134A (en) * | 1994-02-23 | 1998-07-21 | Sharp Kabushiki Kaisha | Liquid crystal display device and a method of fabricating the device using transparent-electrodes as a photomask |
| US5724110A (en) * | 1994-05-27 | 1998-03-03 | Sharp Kabushiki Kaisha | Liquid crystal panel and method for producing the same in which the seal section is formed from a mixture of liquid crystal and resin |
| US5535026A (en) * | 1994-07-20 | 1996-07-09 | Sharp Kabushiki Kaisha | Liquid crystal display device with a polymer between liquid crystal regions made by a heating and cooling process |
| JP2005512142A (en) * | 2001-12-13 | 2005-04-28 | ソニー インターナショナル （ヨーロッパ） ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of forming composite material |
| JP2005512141A (en) * | 2001-12-13 | 2005-04-28 | ソニー インターナショナル （ヨーロッパ） ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method of forming composite material |
| US8153192B2 (en) | 2001-12-13 | 2012-04-10 | Sony Deutschland Gmbh | Method of forming a composite |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2567704B2 (en) | 1996-12-25 |
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