JP3149525B2 - Polymer liquid crystal compound and liquid crystal device - Google Patents
Polymer liquid crystal compound and liquid crystal deviceInfo
- Publication number
- JP3149525B2 JP3149525B2 JP11488392A JP11488392A JP3149525B2 JP 3149525 B2 JP3149525 B2 JP 3149525B2 JP 11488392 A JP11488392 A JP 11488392A JP 11488392 A JP11488392 A JP 11488392A JP 3149525 B2 JP3149525 B2 JP 3149525B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polymer
- polymer liquid
- crystal compound
- present
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、新規な高分子液晶化合
物および表示および調光などに用いられる液晶素子に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel polymer liquid crystal compound and a liquid crystal device used for display and light control.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】光の
散乱遮光状態および非散乱状態を制御するタイプの液晶
素子は、動的散乱モードをはじめ、スメクチック液晶を
用いるもの、高分子分散型液晶、高分子液晶などいくつ
かのタイプの素子が知られている。このうち高分子液晶
を用いた素子は大型化が容易であり、曲面などの平面以
外の素子も可能であるなどの特徴のため注目されてい
る。2. Description of the Related Art A liquid crystal element of a type that controls a light scattering state and a non-scattering state of light includes a dynamic scattering mode, a device using a smectic liquid crystal, a polymer dispersed liquid crystal, Several types of devices are known, such as polymer liquid crystals. Among them, an element using a polymer liquid crystal has attracted attention because of its features such as easy upsizing and the possibility of using an element other than a flat surface such as a curved surface.
【０００３】しかしながら、これらの高分子液晶を用い
た液晶素子は、コントラストが概して低いという問題点
を有していた。本発明は上記の様な従来の高分子液晶を
用いた液晶素子の難点を解決し、遮光性の改善された液
晶素子を提供することを目的とする。However, the liquid crystal devices using these polymer liquid crystals have a problem that the contrast is generally low. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the conventional liquid crystal device using a polymer liquid crystal and to provide a liquid crystal device with improved light-shielding properties.
【０００４】[0004]
【課題を解決するための手段】本発明は、前記請求項１
に記載の一般式〔Ｉ〕で表わされる繰返し単位からな
る、数平均分子量５０００以上の高分子液晶化合物、お
よびこの高分子液晶化合物を少なくとも一方が透明な電
極付き基板間に挟持したことを特徴とする液晶素子に存
する。According to the present invention, there is provided the method of claim 1, wherein
Comprising a repeating unit represented by the general formula [I] described above, a polymer liquid crystal compound having a number average molecular weight of 5,000 or more, and at least one of the polymer liquid crystal compounds sandwiched between transparent electrode-attached substrates. Liquid crystal device.
【０００５】以下本発明を詳細に説明する。本発明の高
分子液晶は例えば下記の合成経路Hereinafter, the present invention will be described in detail. The polymer liquid crystal of the present invention can be prepared, for example, by the following synthetic route.
【０００６】[0006]
【化２】 Embedded image
【０００７】[0007]
【化３】 Embedded image
【０００８】[0008]
【化４】 Embedded image
【０００９】（式中、Ｒ′はアルキル基、Ｘ，ｍは前述
と同じ意味を示す）によりアクリル酸エステル基を有す
るモノマー〔II〕又は〔III 〕を合成し、常法により重
合させることにより製造することができる。重合はアゾ
ビスイソブチロニトリル（ＡＩＢＮ）などのアゾ系開始
剤、ベンゾイルパーオキシドなどの過酸化物系開始剤な
どの通常の開始剤を使用できる。また光重合法を採用し
ても良い。(Wherein R 'is an alkyl group and X and m have the same meanings as described above), and a monomer [II] or [III] having an acrylate group is synthesized and polymerized by a conventional method. Can be manufactured. For polymerization, a conventional initiator such as an azo initiator such as azobisisobutyronitrile (AIBN) and a peroxide initiator such as benzoyl peroxide can be used. Further, a photopolymerization method may be employed.
【００１０】また重合は溶媒の使用もしくは不使用下で
行ないうるが、ベンゼン、トルエン、エチルベンゼンな
どの溶媒を用いて溶液重合を行なうことにより再現性よ
く実施できる。このようにして得られた高分子液晶化合
物を透明電極を有する透明な基板間に挟持して本発明の
液晶素子を構成出来る。The polymerization can be carried out with or without the use of a solvent, but can be carried out with good reproducibility by carrying out a solution polymerization using a solvent such as benzene, toluene or ethylbenzene. The liquid crystal device of the present invention can be constituted by sandwiching the polymer liquid crystal compound thus obtained between transparent substrates having transparent electrodes.
【００１１】この場合、セル・ギャップは数ミクロンな
いし数百ミクロンの範囲で選択できるが、通常は１５〜
７０ミクロンの範囲で好適に実施しうる。本発明の液晶
素子は高い遮光性を有する散乱状態を示し、これに電圧
を印加すると透明状態となる。透明状態は電圧をｏｆｆ
状態としても保持され、これを液晶温度範囲以上に加熱
して冷却すると散乱状態にもどる。In this case, the cell gap can be selected in the range of several microns to several hundreds of microns, but is usually 15 to 100 μm.
It can be suitably carried out in the range of 70 microns. The liquid crystal element of the present invention shows a scattering state having a high light-shielding property, and becomes transparent when a voltage is applied thereto. Transparent state turns off voltage
It is maintained as a state, and when it is heated above the liquid crystal temperature range and cooled, it returns to the scattering state.
【００１２】このような本発明の液晶素子の特性を利用
した表示素子等への応用としては、電気あるいは熱によ
る書込みモードへの応用が考えられる。これらのうち、
代表的なモードとしては、透明状態とした液晶セルにレ
ーザー光により書込む、熱書込みモードのライトバルブ
が挙げられる。このような液晶素子に用いる高分子液晶
組成物としては、本発明の高分子液晶化合物を単独であ
るいは複数種を配合して用いてもよく、更に他の成分と
して赤外線吸収色素あるいは二色性色素等の公知の添加
物を配合してもよく、また単分子の液晶化合物あるいは
液晶組成物を配合してもよい。As an application to a display element or the like utilizing the characteristics of the liquid crystal element of the present invention, an application to an electric or thermal writing mode can be considered. Of these,
A typical mode is a light valve in a thermal writing mode in which a transparent liquid crystal cell is written by a laser beam. As the polymer liquid crystal composition used in such a liquid crystal element, the polymer liquid crystal compound of the present invention may be used alone or in combination of two or more kinds, and as another component, an infrared absorbing dye or a dichroic dye is used. Or other known additives, or a monomolecular liquid crystal compound or liquid crystal composition.
【００１３】[0013]
【実施例】本発明を以下の実施例により更に具体的に説
明するが、本発明はこれら実施例により何ら限定されな
い。 〔実施例１〕前記一般式〔II〕において、Ｒ′及びＸが
ブトキシ基、ｎが６であるモノマーをベンゼン中でＡＩ
ＢＮを加えて７０℃で５時間重合させて溶媒を留去し、
下記の繰り返し単位からなる高分子液晶化合物（ガラス
転移温度（Ｔｇ）−２３℃，ネマチックからアイソトロ
ピックへ変化する温度（ＴN-I)＝６１℃；ゲルパーミエ
ーションクロマトグラフィー（ＧＰＣ）による平均分子
量測定値：数平均分子量（ＭＮ）＝７５５８，重量平均
分子量（ＭＷ）＝１２３０３）を得た。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. [Example 1] In the above general formula [II], a monomer in which R 'and X are a butoxy group and n is 6 was subjected to AI in benzene.
BN was added and the mixture was polymerized at 70 ° C. for 5 hours to distill off the solvent.
Polymer liquid crystal compound composed of the following repeating units (glass transition temperature (Tg) -23 ° C, temperature at which nematic changes to isotropic (TN-I) = 61 ° C; average molecular weight measurement by gel permeation chromatography (GPC)) (Value: number average molecular weight (MN) = 7558, weight average molecular weight (MW) = 12303).
【００１４】[0014]
【化５】 Embedded image
【００１５】〔実施例２〕実施例１と同様の方法で下記
の繰り返し単位からなる高分子液晶化合物（Ｔｇ＝−２
℃，スメクチックＡからネマチックへ変化する温度（Ｔ
SA-N）＝３０℃，ＴN-I ＝５９℃）を得た。Example 2 In the same manner as in Example 1, a polymer liquid crystal compound (Tg = -2) comprising the following repeating units
℃, temperature at which smectic A changes to nematic (T
(SA-N) = 30 ° C., TN-I = 59 ° C.).
【００１６】[0016]
【化６】 Embedded image
【００１７】〔実施例３〕上記の実施例と同様にして、
以下の表に示される高分子液晶化合物を得た。[Embodiment 3] In the same manner as in the above embodiment,
Polymer liquid crystal compounds shown in the following table were obtained.
【００１８】[0018]
【表１】 [Table 1]
【００１９】〔実施例４〕実施例Ｎｏ．３−１１の高分
子液晶化合物を透明電極を有するガラス基板間に挟持し
て、ギャップ５０ミクロンの液晶素子を構成した。本素
子は遮光性の高い散乱状態を示し、５０Ｖの電圧印加で
０．５秒以内に透明状態となった。透明状態の素子を９
０℃に加熱して冷却すると遮光性の高い散乱状態にもど
った。[Embodiment 4] A liquid crystal device having a gap of 50 microns was formed by sandwiching the polymer liquid crystal compound of 3-11 between glass substrates having transparent electrodes. This element showed a scattering state with a high light-shielding property, and became transparent within 0.5 seconds when a voltage of 50 V was applied. 9 transparent elements
When heated to 0 ° C. and cooled, it returned to a scattering state with high light-shielding properties.
【００２０】[0020]
【発明の効果】本発明の高分子液晶化合物を用いること
により遮光性の高い液晶ライトバルブなどの液晶素子を
構成することができる。By using the polymer liquid crystal compound of the present invention, a liquid crystal element such as a liquid crystal light valve having a high light-shielding property can be formed.
【図１】本発明の液晶素子の模式的な断面図である。FIG. 1 is a schematic sectional view of a liquid crystal element of the present invention.
１ 透明基板 ２ 透明電極 ３ 高分子液晶化合物 DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 Transparent electrode 3 Polymer liquid crystal compound
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−54204（ＪＰ，Ａ) 特開 昭64−56709（ＪＰ，Ａ) 特開 昭61−182644（ＪＰ，Ａ) Ｍｏｌ．Ｃｒｙｓｔ．Ｌｉｑ．Ｃｒｙ ｓｔ．Ｓｃｉ．Ｔｅｃｈｎｏｌ．，Ｓｅ ｃｔ．Ａ．（1995）［258］ｐ．51−60 Ｍｏｌ．Ｃｒｙｓｔ．Ｌｉｑ．Ｃｒｙ ｓｔ．Ｓｃｉ．Ｔｅｃｈｎｏｌ．，Ｓｅ ｃｔ．Ａ．（1994）［241］ｐ．119− 129 Ｊ．Ｍａｔｅｒ．Ｃｈｅｍ．（1993) ３［３］，ｐ．241−245 (58)調査した分野(Int.Cl.7，ＤＢ名) C08F 20/00 - 20/70 C08F 120/00 - 120/70 C08F 220/00 - 220/70 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-54204 (JP, A) JP-A-64-56709 (JP, A) JP-A-61-182644 (JP, A) Mol. Cryst. Liq. Cry st. Sci. Technol. , Sect. A. (1995) [258] p. 51-60 Mol. Cryst. Liq. Cry st. Sci. Technol. , Sect. A. (1994) [241] p. 119-129 J.C. Mater. Chem. (1993) 3 [3], p. 241-245 (58) Field surveyed (Int.Cl. 7 , DB name) C08F 20/00-20/70 C08F 120/00-120/70 C08F 220/00-220/70
Claims (2)
位からなる数平均分子量５０００以上の高分子液晶化合
物。 【化１】 （式中、Ｒはアルコキシ基、Ｘはアルコキシ基、シアノ
基、ｍは０または１、ｎは２〜１８を示す。）1. A high-molecular liquid crystal compound comprising a repeating unit represented by the following general formula [I] and having a number average molecular weight of 5,000 or more. Embedded image (In the formula, R represents an alkoxy group, X represents an alkoxy group, a cyano group, m represents 0 or 1, and n represents 2 to 18.)
くとも一方が透明な電極付き基板間に挟持したことを特
徴とする液晶素子。2. A liquid crystal device, wherein at least one of the polymer liquid crystal compounds according to claim 1 is sandwiched between transparent substrates with electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11488392A JP3149525B2 (en) | 1992-05-07 | 1992-05-07 | Polymer liquid crystal compound and liquid crystal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11488392A JP3149525B2 (en) | 1992-05-07 | 1992-05-07 | Polymer liquid crystal compound and liquid crystal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05310840A JPH05310840A (en) | 1993-11-22 |
| JP3149525B2 true JP3149525B2 (en) | 2001-03-26 |
Family
ID=14649064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11488392A Expired - Fee Related JP3149525B2 (en) | 1992-05-07 | 1992-05-07 | Polymer liquid crystal compound and liquid crystal device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3149525B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6444277B1 (en) | 1993-01-28 | 2002-09-03 | Applied Materials, Inc. | Method for depositing amorphous silicon thin films onto large area glass substrates by chemical vapor deposition at high deposition rates |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996010209A1 (en) * | 1994-09-28 | 1996-04-04 | Mitsui Toatsu Chemicals, Inc. | Polymeric liquid-crystal element and process for producing the same |
| JP5040259B2 (en) * | 2005-12-08 | 2012-10-03 | Ｊｎｃ株式会社 | Lateral α-substituted acrylate compound and polymer thereof |
| US7919648B2 (en) | 2005-12-08 | 2011-04-05 | Chisso Corporation | Lateral α-substituted acrylate compound and polymer thereof |
| CN102976971A (en) * | 2012-12-24 | 2013-03-20 | 厦门大学 | Synthesis method of polyacrylate side chain liquid crystal polymer monomer |
| JP6102423B2 (en) * | 2013-03-29 | 2017-03-29 | Dic株式会社 | Polymerizable compound and optical element |
-
1992
- 1992-05-07 JP JP11488392A patent/JP3149525B2/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| Ｊ．Ｍａｔｅｒ．Ｃｈｅｍ．（１９９３）３［３］，ｐ．２４１−２４５ |
| Ｍｏｌ．Ｃｒｙｓｔ．Ｌｉｑ．Ｃｒｙｓｔ．Ｓｃｉ．Ｔｅｃｈｎｏｌ．，Ｓｅｃｔ．Ａ．（１９９４）［２４１］ｐ．１１９−１２９ |
| Ｍｏｌ．Ｃｒｙｓｔ．Ｌｉｑ．Ｃｒｙｓｔ．Ｓｃｉ．Ｔｅｃｈｎｏｌ．，Ｓｅｃｔ．Ａ．（１９９５）［２５８］ｐ．５１−６０ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6444277B1 (en) | 1993-01-28 | 2002-09-03 | Applied Materials, Inc. | Method for depositing amorphous silicon thin films onto large area glass substrates by chemical vapor deposition at high deposition rates |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05310840A (en) | 1993-11-22 |
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