JP2006282579A - Liquid crystalline (meth)acrylic compound having alkoxynaphthyl group and polymer thereof - Google Patents

Liquid crystalline (meth)acrylic compound having alkoxynaphthyl group and polymer thereof Download PDF

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JP2006282579A
JP2006282579A JP2005104625A JP2005104625A JP2006282579A JP 2006282579 A JP2006282579 A JP 2006282579A JP 2005104625 A JP2005104625 A JP 2005104625A JP 2005104625 A JP2005104625 A JP 2005104625A JP 2006282579 A JP2006282579 A JP 2006282579A
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liquid crystalline
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acrylic compound
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Takeshi Kataoka
健 片岡
Hitoshi Mazaki
仁詩 真崎
Toru Nakamura
徹 中村
Takashi Seki
隆史 關
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Eneos Corp
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Nippon Oil Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystalline (meth)acrylic compound having such an excellent aligning property that it exhibits a good aligning property at a lower temperature than conventional side-chain liquid crystalline polymers, and a (co)polymer derived from the compound. <P>SOLUTION: The liquid crystalline (meth)acrylic compound having an alkoxynaphthyl group is represented by formula (1) (wherein R is a methyl group or hydrogen; L<SB>1</SB>and L<SB>2</SB>are each a linking group such as -O- or the like; and M is a phenylene ring, a cyclohexylene ring or the like). The polymer derived from the compound is also provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、アルコキシナフチル基を有する新規な液晶性(メタ)アクリル化合物、および当該化合物から誘導される新規な側鎖型液晶性ポリマーに関する。   The present invention relates to a novel liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group, and a novel side chain liquid crystalline polymer derived from the compound.

近年、液晶材料を光学用途に使用するための研究開発が活発に行われている。例えば、液晶材料を固定化し、フィルム化させて得る液晶フィルムは、液晶ディスプレイの色補償や視野角拡大の用途に実用化されている(例えば、特許文献1参照。)。
液晶フィルムを作る方法は種々知られている。例えば、液晶材料の薄膜を基板上に形成させ、ガラス転移点(Tg)より高い温度で熱処理して液晶材料を配向させた後、冷却して配向を固定化し、次いで光照射や加熱などの外部刺激を与えて架橋する方法が挙げられる(例えば、特許文献2参照。)。この方法は、主鎖型液晶性ポリマーと比較して低Tgの側鎖型液晶性ポリマーを用いても、耐熱性に優れた液晶フィルムを製造できるため、優れた方法である。
この方法では、液晶材料の分子設計が、配向にムラのない均一な液晶フィルムを形成できるかどうかに影響を及ぼす。例えば、液晶材料として側鎖型液晶性ポリマーを用いる場合、側鎖の分子設計や構成するモノマーの配合比などを変えると、得られる液晶フィルムの配向状態は大きく変化する。
従来の側鎖型液晶性ポリマーでは、側鎖部分すなわちメソゲン部分にビフェニル骨格が主に使用されている。ビフェニル骨格はメソゲンとして典型的な骨格と知られているものの、液晶材料が均一に配向した液晶フィルムを形成するには、比較的高温下で処理せねばならないという問題があり、さらなる改良が望まれている。
特許第3248038号公報 特開2004−123597号公報
In recent years, research and development for using liquid crystal materials for optical applications has been actively conducted. For example, a liquid crystal film obtained by fixing a liquid crystal material and forming a film has been put to practical use for color compensation of liquid crystal displays and for widening the viewing angle (see, for example, Patent Document 1).
Various methods for producing a liquid crystal film are known. For example, a thin film of a liquid crystal material is formed on a substrate, the liquid crystal material is aligned by heat treatment at a temperature higher than the glass transition point (Tg), then cooled to fix the alignment, and then externally applied such as light irradiation or heating There is a method of crosslinking by giving a stimulus (for example, see Patent Document 2). This method is an excellent method because a liquid crystal film excellent in heat resistance can be produced even when a side chain type liquid crystalline polymer having a low Tg is used as compared with the main chain type liquid crystalline polymer.
In this method, the molecular design of the liquid crystal material affects whether a uniform liquid crystal film with uniform alignment can be formed. For example, when a side chain type liquid crystalline polymer is used as the liquid crystal material, the alignment state of the obtained liquid crystal film changes greatly if the molecular design of the side chain or the blending ratio of the constituent monomers is changed.
In a conventional side chain type liquid crystalline polymer, a biphenyl skeleton is mainly used in a side chain portion, that is, a mesogen portion. Although the biphenyl skeleton is known as a typical mesogen skeleton, there is a problem that the liquid crystal material must be processed at a relatively high temperature to form a uniformly oriented liquid crystal film, and further improvement is desired. ing.
Japanese Patent No. 3248038 JP 2004-123597 A

本発明は、従来の側鎖型液晶性ポリマーに比べ、配向性に優れ、より低温で良好な配向性を示す液晶性(メタ)アクリル化合物および当該化合物から誘導される(共)重合体を提供するものである。   The present invention provides a liquid crystalline (meth) acrylic compound that exhibits superior alignment and better alignment at a lower temperature than conventional side chain liquid crystalline polymers, and (co) polymers derived from the compounds. To do.

本発明者らは、前記課題について鋭意研究した結果、側鎖型液晶性ポリマーが均一に配向する温度を下げることのできるメソゲンとしてアルコキシナフチル基を導入した液晶性(メタ)アクリル化合物を見出し、本発明を完成するに至った。   As a result of intensive research on the above problems, the present inventors have found a liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group introduced as a mesogen capable of lowering the temperature at which the side chain liquid crystalline polymer is uniformly aligned. The invention has been completed.

すなわち本発明の第1は、下記式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物に関する。

Figure 2006282579
(式(1)中、Rはメチル基または水素を表し、LおよびLはそれぞれ個別に単結合、−O−、−O−CO−、−CO−O−のいずれかを表し、Mは式(2)のいずれかの基を表し、mは1〜10の整数を表し、nは0〜11の整数を表す。)
Figure 2006282579
That is, the first of the present invention relates to a (meth) acrylic compound having an alkoxynaphthyl group represented by the following formula (1).
Figure 2006282579
(In the formula (1), R represents a methyl group or hydrogen, L 1 and L 2 each independently represent a single bond, —O—, —O—CO—, —CO—O—, and M Represents any group of formula (2), m represents an integer of 1 to 10, and n represents an integer of 0 to 11.)
Figure 2006282579

本発明の第2は、前記式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物から誘導される式(3)で表されるユニットを含む側鎖型液晶性ポリマーに関する。

Figure 2006282579
(式(3)中、R、L、L、M、mおよびnは式(1)と同じである。) 2nd of this invention is related with the side chain type liquid crystalline polymer containing the unit represented by Formula (3) induced | guided | derived from the (meth) acrylic compound which has the alkoxy naphthyl group represented by said Formula (1).
Figure 2006282579
(In formula (3), R, L 1 , L 2 , M, m and n are the same as in formula (1).)

本発明の第3は、前記式(3)で示されるユニットを5〜100モル%含むことを特徴とする本発明の第2の側鎖型液晶性ポリマーに関する。
本発明の第4は、重量平均分子量が2,000〜100,000であることを特徴とする本発明の第2または本発明の第3に記載の側鎖型液晶性ポリマーに関する。
本発明の第5は、本発明の第2〜第4のいずれかに記載の側鎖型液晶性ポリマーを少なくとも10質量%以上含有することを特徴とする高分子液晶組成物に関する。
本発明の第6は、光カチオン発生剤および/または熱カチオン発生剤を含むことを特徴とする本発明の第5に記載の高分子液晶組成物に関する。
3rd of this invention is related with the 2nd side chain type liquid crystalline polymer of this invention characterized by including 5-100 mol% of units shown by said Formula (3).
A fourth aspect of the present invention relates to the side-chain liquid crystalline polymer according to the second aspect of the present invention or the third aspect of the present invention, which has a weight average molecular weight of 2,000 to 100,000.
A fifth aspect of the present invention relates to a polymer liquid crystal composition comprising at least 10% by mass or more of the side chain type liquid crystalline polymer according to any one of the second to fourth aspects of the present invention.
6th of this invention is related with the polymer liquid crystal composition of 5th of this invention characterized by including a photo cation generator and / or a thermal cation generator.

以下、本発明を詳細に説明する。
本発明のアルコキシナフチル基を有する液晶性(メタ)アクリル化合物は、下記式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物である。

Figure 2006282579
式(1)中、Rはメチル基または水素を表し、LおよびLはそれぞれ個別に単結合、−O−、−O−CO−、−CO−O−のいずれかを表し、Mは式(2)のいずれかの基を表し、mは1〜10の整数を表し、nは0〜11の整数を表す。 Hereinafter, the present invention will be described in detail.
The liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group of the present invention is a (meth) acrylic compound having an alkoxynaphthyl group represented by the following formula (1).
Figure 2006282579
In the formula (1), R represents a methyl group or hydrogen, L 1 and L 2 individually represent any of a single bond, —O—, —O—CO—, and —CO—O—, and M represents Represents any group of formula (2), m represents an integer of 1 to 10, and n represents an integer of 0 to 11.

Figure 2006282579
Figure 2006282579

すなわち、本発明の液晶性(メタ)アクリル化合物は、アルコキシナフチル基を有する芳香族基やシクロヘキシル基等がエステル結合で連なるメソゲン部分を、(メタ)アクリロイル基と結合させた構造をしている。   That is, the liquid crystalline (meth) acrylic compound of the present invention has a structure in which an aromatic group having an alkoxynaphthyl group, a cyclohexyl group, or the like is linked to a (meth) acryloyl group by an ester bond.

各構成単位について説明する。
式(1)において、LおよびLはそれぞれ独立に、単結合、−O−、−CO−O−、−O−CO−のいずれかを表し、Mは式(2)から選ばれるいずれかの官能基を表す。mは1〜10の整数を表し、nは0〜11の整数を示す。
式(1)中の「−(CH−」において、mは1〜10、好ましくは1〜6である。アルコキシナフチル基部分の「−(CH−」については、nは0〜11、好ましくは0〜5である。炭化水素鎖の長さは長すぎると側鎖型液晶性ポリマーが均一に配向しづらくなり、さらに液晶フィルムとした場合の耐熱性を下げたりして好ましくない。
Each structural unit will be described.
In Formula (1), L 1 and L 2 each independently represent any of a single bond, —O—, —CO—O—, and —O—CO—, and M is any selected from Formula (2). These functional groups are represented. m represents an integer of 1 to 10, and n represents an integer of 0 to 11.
"- (CH 2) m -" in formula (1) in, m is 1-10, preferably 1-6. Arco alkoxy naphthyl group moiety "- (CH 2) n -" For, n is 0 to 11, preferably 0-5. If the length of the hydrocarbon chain is too long, the side chain type liquid crystalline polymer is difficult to be uniformly oriented, and the heat resistance in the case of a liquid crystal film is lowered, which is not preferable.

本発明のアルコキシナフチル基を有する液晶性(メタ)アクリル化合物は、通常の有機化学合成法で合成できるもので、特に制限されるものではない。例えば、ウィリアムソンのエーテル合成や、脱水縮合剤を用いたエステル合成などの手段で、アルコキシナフチル基を有する液晶性(メタ)アクリル化合物を合成できる。   The liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group of the present invention can be synthesized by an ordinary organic chemical synthesis method and is not particularly limited. For example, a liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group can be synthesized by means such as Williamson's ether synthesis or ester synthesis using a dehydrating condensing agent.

次に、本発明の側鎖型液晶性ポリマーについて説明する。
本発明の側鎖型液晶性ポリマーは、前記式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物から誘導される下記式(3)で表されるユニットを含む側鎖型液晶性ポリマーである。

Figure 2006282579
Next, the side chain type liquid crystalline polymer of the present invention will be described.
The side chain type liquid crystalline polymer of the present invention is a side chain type liquid crystal containing a unit represented by the following formula (3) derived from a (meth) acrylic compound having an alkoxynaphthyl group represented by the formula (1). Polymer.
Figure 2006282579

式(3)で表されるユニットを含む側鎖型液晶性ポリマーは、式(1)で表されるアルコキシナフチル基を有する液晶性(メタ)アクリル化合物を、ラジカル反応で単独重合もしくは他の共重合可能な化合物と共重合すれば容易に合成できる。
重合条件は、特に限定されるものではなく、通常のラジカル重合の条件を採用すればよい。共重合可能な化合物は、ラジカル重合性があり、本発明の式(1)で表される液晶性(メタ)アクリル化合物と共重合できる化合物であれば、特に限定されるものではないが、得られたポリマーの液晶性が高い方が好ましいため、メソゲンを有する(メタ)アクリル化合物が望ましい。
The side chain type liquid crystalline polymer containing a unit represented by the formula (3) is obtained by homopolymerizing or otherwise copolymerizing a liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group represented by the formula (1) by a radical reaction. It can be easily synthesized by copolymerizing with a polymerizable compound.
Polymerization conditions are not particularly limited, and normal radical polymerization conditions may be employed. The copolymerizable compound is not particularly limited as long as it is a compound that has radical polymerizability and can be copolymerized with the liquid crystalline (meth) acrylic compound represented by the formula (1) of the present invention. Since it is preferable that the obtained polymer has high liquid crystallinity, a (meth) acrylic compound having a mesogen is desirable.

式(3)で表されるユニットを含む側鎖型液晶性ポリマーは、式(3)で表されるユニットを5〜100モル%含むものが好ましく、10〜100モル%含むものが特に好ましい。式(3)で表されるユニットが少ないと、均一に配向する温度が十分に低くならないため好ましくない。重合平均分子量は、通常は2,000〜100,000で、4,000〜40,000が特に好ましい。重合平均分子量が低すぎると側鎖型液晶性ポリマーの粘度が低くなり、十分な膜厚を有する液晶フィルムが得られないため好ましくない。   The side chain type liquid crystalline polymer containing the unit represented by the formula (3) preferably contains 5 to 100 mol% of the unit represented by the formula (3), and particularly preferably contains 10 to 100 mol%. If the number of units represented by the formula (3) is small, the temperature at which the uniform orientation is performed is not sufficiently low, which is not preferable. The polymerization average molecular weight is usually from 2,000 to 100,000, particularly preferably from 4,000 to 40,000. If the polymerization average molecular weight is too low, the viscosity of the side chain type liquid crystalline polymer becomes low, and a liquid crystal film having a sufficient film thickness cannot be obtained.

液晶性高分子組成物に含まれる、本発明の側鎖型液晶性ポリマーの含有量は10質量%以上が好ましく、より好ましくは30質量%以上、さらに好ましくは50質量%以上含むものが望ましい。本発明の側鎖型液晶性ポリマーの含有量が少ないと、均一に配向する温度が十分に低くならないため好ましくない。   The content of the side chain type liquid crystalline polymer of the present invention contained in the liquid crystalline polymer composition is preferably 10% by mass or more, more preferably 30% by mass or more, and still more preferably 50% by mass or more. If the content of the side-chain liquid crystalline polymer of the present invention is small, the temperature for uniform alignment is not sufficiently low, which is not preferable.

本発明の液晶性高分子組成物には、光カチオン発生剤および/または熱カチオン発生剤などの外部刺激でカチオンを発生し得る化合物を配合するのが好ましい。   The liquid crystalline polymer composition of the present invention preferably contains a compound capable of generating cations by an external stimulus such as a photo cation generator and / or a thermal cation generator.

光カチオン発生剤とは、適当な波長の光を照射することによりカチオンを発生できる化合物を意味し、有機スルフォニウム塩系、ヨードニウム塩系、フォスフォニウム塩系などを例示することが出来る。これら化合物の対イオンとしては、アンチモネート、フォスフェート、ボレートなどが好ましく用いられる。具体的な化合物としては、ArSbF 、ArBF 、ArPF (ただし、Arはフェニル基または置換フェニル基を示す。)などが挙げられる。また、スルホン酸エステル類、トリアジン類、ジアゾメタン類、β−ケトスルホン、イミノスルホナート、ベンゾインスルホナートなども用いることができる。 The photo cation generator means a compound capable of generating a cation by irradiating with light having an appropriate wavelength, and examples thereof include organic sulfonium salt systems, iodonium salt systems, and phosphonium salt systems. Antimonates, phosphates, borates and the like are preferably used as counter ions of these compounds. Specific examples of the compound include Ar 3 S + SbF 6 , Ar 3 P + BF 4 and Ar 2 I + PF 6 (wherein Ar represents a phenyl group or a substituted phenyl group). In addition, sulfonate esters, triazines, diazomethanes, β-ketosulfone, iminosulfonate, benzoinsulfonate, and the like can also be used.

熱カチオン発生剤とは、適当な温度に加熱されることによりカチオンを発生できる化合物であり、例えば、ベンジルスルホニウム塩類、ベンジルアンモニウム塩類、ベンジルピリジニウム塩類、ベンジルホスホニウム塩類、ヒドラジニウム塩類、カルボン酸エステル類、スルホン酸エステル類、アミンイミド類、五塩化アンチモン−塩化アセチル錯体、ジアリールヨードニウム塩−ジベンジルオキシ銅、ハロゲン化ホウ素−三級アミン付加物などを挙げることができる。   The thermal cation generator is a compound capable of generating a cation when heated to an appropriate temperature, for example, benzylsulfonium salts, benzylammonium salts, benzylpyridinium salts, benzylphosphonium salts, hydrazinium salts, carboxylic acid esters Examples thereof include sulfonic acid esters, amine imides, antimony pentachloride-acetyl chloride complexes, diaryliodonium salts-dibenzyloxycopper, and boron halide-tertiary amine adducts.

これらのカチオン発生剤の液晶性高分子組成物中への添加量は、用いる側鎖型液晶性ポリマーを構成するメソゲン部分やスペーサー部分の構造や、液晶の配向条件などにより異なるため一概には言えないが、側鎖型液晶性ポリマーに対し、通常100質量ppm〜20質量%、好ましくは1000質量ppm〜10質量%、より好ましくは0.2質量%〜7質量%、最も好ましくは0.5質量%〜5質量%の範囲である。100質量ppmよりも少ない場合には、発生するカチオンの量が十分でなく重合が進行しないおそれがあり、また20質量%よりも多い場合には、液晶フィルム中に残存するカチオン発生剤の分解残存物等が多くなり耐光性などが悪化するおそれがあるため好ましくない。   The amount of these cation generators added to the liquid crystalline polymer composition varies depending on the structure of the mesogen portion and spacer portion constituting the side chain type liquid crystalline polymer used, the alignment conditions of the liquid crystal, etc. Although not 100 mass ppm to 20 mass%, preferably 1000 mass ppm to 10 mass%, more preferably 0.2 mass% to 7 mass%, most preferably 0.5 mass% to the side chain type liquid crystalline polymer. It is in the range of mass% to 5 mass%. If the amount is less than 100 mass ppm, the amount of cations generated may not be sufficient and polymerization may not proceed. If the amount is more than 20 mass%, the remaining cation generator remains in the liquid crystal film. It is not preferable because there is a risk that the light resistance and the like may deteriorate due to an increase in the number of objects.

次に、本発明の液晶性高分子組成物を用いた液晶フィルムの製造方法について説明する。液晶フィルムの製造方法としてはこれらに限定されるものではないが、液晶材料を配向基板上に展開し、当該液晶性高分子組成物を配向させた後、加熱処理および/または光照射することにより当該配向状態を固定化することにより製造できる。
配向基板としては、ポリイミド、ポリフェニレンスルフィド、ポリフェニレンオキシド、ポリエーテルケトン、ポリスルホン、ポリエチレンナフタレート、ポリエチレンテレフタレート、ポリアリレート、トリアセチルセルロース等のフィルムが例示できる。
Next, a method for producing a liquid crystal film using the liquid crystalline polymer composition of the present invention will be described. Although it does not limit as a manufacturing method of a liquid crystal film, after developing a liquid crystal material on the orientation board | substrate and orienting the said liquid crystalline polymer composition, it is by heat-processing and / or light irradiation. It can manufacture by fixing the said orientation state.
Examples of the alignment substrate include films of polyimide, polyphenylene sulfide, polyphenylene oxide, polyether ketone, polysulfone, polyethylene naphthalate, polyethylene terephthalate, polyarylate, triacetyl cellulose, and the like.

当該液晶性高分子組成物を配向基板上で均一に配向させるためには、用いる液晶性高分子組成物の液晶発現温度範囲で熱処理すればよい。熱処理の条件としては、用いる液晶性高分子組成物の液晶相挙動温度(転移温度)により最適条件や限界値が異なるため一概には言えないが、通常10〜250℃、好ましくは40℃〜180℃の範囲であり、当該液晶性高分子組成物のTg以上の温度、さらに好ましくはTgより10℃以上高い温度で熱処理するのが好ましい。あまり低温では、液晶配向が充分に進行しないおそれがあり、また高温では液晶性高分子組成物中のカチオン重合性反応基や配向基板に悪影響を与えるおそれがある。また、熱処理時間については、通常3秒〜30分、好ましくは10秒〜10分の範囲である。3秒より短い熱処理時間では、液晶配向が充分に完成しないおそれがあり、また30分を超える熱処理時間では、生産性が悪くなるため、どちらの場合も好ましくない。   In order to uniformly align the liquid crystalline polymer composition on the alignment substrate, the liquid crystalline polymer composition may be heat-treated within the liquid crystal expression temperature range of the liquid crystalline polymer composition to be used. The conditions for the heat treatment cannot be generally stated because the optimum conditions and limit values differ depending on the liquid crystal phase behavior temperature (transition temperature) of the liquid crystalline polymer composition to be used, but are usually 10 to 250 ° C., preferably 40 to 180 ° C. It is preferable that the heat treatment be performed at a temperature in the range of ° C. and higher than the Tg of the liquid crystalline polymer composition, more preferably 10 ° C. higher than the Tg. If the temperature is too low, the liquid crystal alignment may not proceed sufficiently, and if the temperature is high, the cationic polymerizable reactive group in the liquid crystalline polymer composition and the alignment substrate may be adversely affected. Moreover, about heat processing time, it is 3 seconds-30 minutes normally, Preferably it is the range of 10 seconds-10 minutes. If the heat treatment time is shorter than 3 seconds, the liquid crystal alignment may not be completed sufficiently, and if the heat treatment time exceeds 30 minutes, the productivity is deteriorated.

本発明のアルコキシナフチル基を有する液晶性(メタ)アクリル化合物およびその(共)重合体は、従来の側鎖型液晶性ポリマーに比べ配向性に優れ、より低温で良好な配向性を示す。   The liquid crystalline (meth) acrylic compound having an alkoxynaphthyl group and its (co) polymer of the present invention are excellent in alignment as compared with conventional side-chain liquid crystalline polymers, and exhibit good alignment at lower temperatures.

以下に実施例により本発明を具体的に説明するが、本発明はこれらに限定されるものではない。
なお、実施例で用いた各分析方法は以下の通りである。
(1)H−NMRの測定
化合物を重水素化クロロホルムに溶解し、400MHzのH−NMR(VARIAN社製INOVA400)で測定した。
(2)GPCの測定
化合物をテトラヒドロフランに溶解し、東ソー社製8020GPCシステムで、TSK−GEL SuperH1000、SuperH2000、SuperH3000、SuperH4000を直列につなぎ、溶出液としてテトラヒドロフランを用いて測定した。分子量の較正にはポリスチレンスタンダードを用いた。
(3)相挙動の観察
相挙動はメトラー社製ホットステージ上で、試料を加熱しつつ、オリンパス光学社製BH2偏光顕微鏡で観察した。
相転移温度は、Perkin−Elmer社製示差走査熱量計DSC7により測定した。
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
In addition, each analysis method used in the Example is as follows.
(1) Measurement of 1 H-NMR The compound was dissolved in deuterated chloroform, and measured by 1 H-NMR of 400 MHz (INOVA400 manufactured by Varian).
(2) Measurement of GPC The compound was dissolved in tetrahydrofuran, and TSK-GEL SuperH1000, SuperH2000, SuperH3000, and SuperH4000 were connected in series with a Tosoh 8020GPC system and measured using tetrahydrofuran as an eluent. Polystyrene standards were used for molecular weight calibration.
(3) Observation of phase behavior The phase behavior was observed with a BH2 polarizing microscope manufactured by Olympus Optics while heating the sample on a hot stage manufactured by Mettler.
The phase transition temperature was measured with a differential scanning calorimeter DSC7 manufactured by Perkin-Elmer.

[参考例1]
スキーム1に従い、4−(2−アクリロイロキシ−エトキシ)フェノールを合成した。

Figure 2006282579
[Reference Example 1]
According to Scheme 1, 4- (2-acryloyloxy-ethoxy) phenol was synthesized.
Figure 2006282579

[参考例2]
スキーム2に従い、2−ヘキシルオキシ−6−ナフタレンカルボン酸を合成した。

Figure 2006282579
[Reference Example 2]
According to Scheme 2, 2-hexyloxy-6-naphthalenecarboxylic acid was synthesized.
Figure 2006282579

[参考例3]
特許文献2を参考に、アルコキシナフチル基をもたない液晶性アクリル化合物1(下記式(4)で示される化合物)を合成した。

Figure 2006282579
[Reference Example 3]
With reference to Patent Document 2, a liquid crystalline acrylic compound 1 having no alkoxy naphthyl group (a compound represented by the following formula (4)) was synthesized.
Figure 2006282579

[参考例4]
特許文献2を参考に、アルコキシナフチル基を持たない液晶性アクリル化合物2(下記式(5)で示される化合物)を合成した。

Figure 2006282579
[Reference Example 4]
With reference to Patent Document 2, a liquid crystalline acrylic compound 2 having no alkoxy naphthyl group (a compound represented by the following formula (5)) was synthesized.
Figure 2006282579

[参考例5]
液晶性ポリアクリレート1を、特許文献2を参考に合成した。
参考例3で合成した液晶性アクリル化合物1(9.9g,24mmol)、参考例4で合成した液晶性アクリル化合物2(2.6g,6.0mmol)をDMF(85ml)に100℃で溶解させた。この溶液に2,2−アゾビスイソブチロニトリル(0.25g)を添加し、窒素下100℃で6時間重合した後、メタノール(700ml)に再沈させ精製し、液晶性ポリアクリレート1を得た。ホットステージ観察より、160℃以上でほぼ均一なネマチック相が観察された。
[Reference Example 5]
Liquid crystalline polyacrylate 1 was synthesized with reference to Patent Document 2.
The liquid crystalline acrylic compound 1 (9.9 g, 24 mmol) synthesized in Reference Example 3 and the liquid crystalline acrylic compound 2 (2.6 g, 6.0 mmol) synthesized in Reference Example 4 were dissolved in DMF (85 ml) at 100 ° C. It was. 2,2-Azobisisobutyronitrile (0.25 g) was added to this solution, polymerized at 100 ° C. for 6 hours under nitrogen, purified by reprecipitation in methanol (700 ml), and liquid crystalline polyacrylate 1 was obtained. Obtained. From the hot stage observation, a substantially uniform nematic phase was observed at 160 ° C. or higher.

[参考例6]
液晶性ポリアクリレート2を、特許文献2を参考に合成した。
参考例3で合成した液晶性アクリル化合物1(1.0g,2.5mmol)をDMF(20ml)に100℃で溶解させた。この溶液に2,2−アゾビスイソブチロニトリル(25mg)を添加し、窒素下100℃で6時間重合した後、メタノール(60ml)に再沈させ精製し、液晶性ポリアクリレート2を得た。ホットステージ観察より、140℃以上でほぼ均一なネマチック相が観察された。
[Reference Example 6]
Liquid crystalline polyacrylate 2 was synthesized with reference to Patent Document 2.
Liquid crystalline acrylic compound 1 (1.0 g, 2.5 mmol) synthesized in Reference Example 3 was dissolved in DMF (20 ml) at 100 ° C. 2,2-Azobisisobutyronitrile (25 mg) was added to this solution, polymerized at 100 ° C. for 6 hours under nitrogen, and then purified by reprecipitation in methanol (60 ml) to obtain liquid crystalline polyacrylate 2. . From the hot stage observation, a substantially uniform nematic phase was observed at 140 ° C. or higher.

[実施例1]
下記スキーム3に従い、アルコキシナフチル基を有する液晶性アクリル化合物3を合成した。
参考例1に従い合成した4−(2−アクリロイロキシ−エトキシ)フェノール(10g,50mmol)、参考例2に従い合成した6−ヘキシロキシ−2−ナフタレンカルボン酸(14g,50mmol)、4−ジメチルアミノピリジン(DMAP)、2,6−ジ−t−ブチル−4−メチルフェノール(BHT)およびジクロロメタン(100ml)の溶液を氷浴で冷却し、これに1,3−ジシクロヘキシルカルボジイミド(DCC)(11g,55mmol)のジクロロメタン(10ml)溶液を滴下し、0℃で1時間次いで室温で10時間撹拌した。生じた沈殿物をろ別し、1N塩酸水溶液、飽和炭酸水素ナトリウム水溶液および飽和食塩水の順に洗浄し、次いで無水硫酸マグネシウムで乾燥させた後、溶液を濃縮した。得られた白色固体をエタノールで再結晶して、目的とするアルコキシナフチル基を有する液晶性アクリル化合物3(16g,収率71%)を得た。
得られた液晶性アクリル化合物3のH−NMRスペクトルを図1に示す。なお、図中の×は不純物のピークを表す。ホットステージ観察より、スライドガラス上で80℃以上の温度でホメオトロピック相が発現することを確認した。
[Example 1]
According to the following scheme 3, a liquid crystalline acrylic compound 3 having an alkoxynaphthyl group was synthesized.
4- (2-acryloyloxy-ethoxy) phenol (10 g, 50 mmol) synthesized according to Reference Example 1, 6-hexyloxy-2-naphthalenecarboxylic acid (14 g, 50 mmol) synthesized according to Reference Example 2, 4-dimethylaminopyridine (DMAP) ), 2,6-di-t-butyl-4-methylphenol (BHT) and dichloromethane (100 ml) were cooled in an ice bath to which 1,3-dicyclohexylcarbodiimide (DCC) (11 g, 55 mmol) was added. Dichloromethane (10 ml) solution was added dropwise and stirred at 0 ° C. for 1 hour and then at room temperature for 10 hours. The resulting precipitate was filtered off, washed with 1N hydrochloric acid aqueous solution, saturated aqueous sodium hydrogen carbonate solution and saturated brine in this order, and then dried over anhydrous magnesium sulfate, and then the solution was concentrated. The obtained white solid was recrystallized from ethanol to obtain a target liquid crystalline acrylic compound 3 having an alkoxynaphthyl group (16 g, yield 71%).
The 1 H-NMR spectrum of the obtained liquid crystalline acrylic compound 3 is shown in FIG. In the figure, x represents an impurity peak. From the hot stage observation, it was confirmed that a homeotropic phase was developed at a temperature of 80 ° C. or higher on the slide glass.

Figure 2006282579
Figure 2006282579

[実施例2]
実施例1で合成した液晶性アクリル化合物3(1.2g,2.5mmol)をDMF(20ml)に100℃で溶解させた。この溶液に2,2−アゾビスイソブチロニトリル(25mg)を添加し、窒素下100℃で6時間重合した後、メタノール(60ml)に再沈させ精製し、側鎖型液晶性ポリアクリレート3を得た。
側鎖型液晶性ポリアクリレート3のH−NMRスペクトルを図2に示す。なお、図中の×は不純物のピークを表す。ホットステージ観察より、140℃以上で均一なネマチック相が観察された。
[Example 2]
Liquid crystalline acrylic compound 3 (1.2 g, 2.5 mmol) synthesized in Example 1 was dissolved in DMF (20 ml) at 100 ° C. 2,2-Azobisisobutyronitrile (25 mg) was added to this solution, polymerized at 100 ° C. for 6 hours under nitrogen, purified by reprecipitation in methanol (60 ml), and side chain type liquid crystalline polyacrylate 3 Got.
The 1 H-NMR spectrum of the side chain type liquid crystalline polyacrylate 3 is shown in FIG. In the figure, x represents an impurity peak. From the hot stage observation, a uniform nematic phase was observed at 140 ° C. or higher.

[実施例3]
参考例3で合成した液晶性アクリル化合物1(7.4g,18mmol)、参考例4で合成した液晶性アクリル化合物2(2.6g,6.0mmol)、実施例1で合成した液晶性アクリル化合物3(2.8g,6.0mmol)をDMF(85ml)に100℃で溶解させた。この溶液に2,2−アゾビスイソブチロニトリル(0.25g)を添加し、窒素下100℃で6時間撹拌した後、メタノール(0.70L)に再沈させ精製し、側鎖型液晶性ポリアクリレート4を得た。
得られた液晶性ポリアクリレート4のH−NMRスペクトルを図3に示す。なお、図中の×は不純物のピークを表す。
DSC測定より、Tgは66℃であった。
得られた液晶性ポリアクリレート4の重量平均分子量はMw=6890であった。
ホットステージ観察より、150℃以上で均一なネマチック相が観察された。
[Example 3]
Liquid crystalline acrylic compound 1 synthesized in Reference Example 3 (7.4 g, 18 mmol), liquid crystalline acrylic compound 2 synthesized in Reference Example 4 (2.6 g, 6.0 mmol), liquid crystalline acrylic compound synthesized in Example 1 3 (2.8 g, 6.0 mmol) was dissolved in DMF (85 ml) at 100 ° C. 2,2-Azobisisobutyronitrile (0.25 g) was added to this solution, stirred for 6 hours at 100 ° C. under nitrogen, purified by reprecipitation in methanol (0.70 L), and side-chain liquid crystals. Polyacrylate 4 was obtained.
The 1 H-NMR spectrum of the obtained liquid crystalline polyacrylate 4 is shown in FIG. In the figure, x represents an impurity peak.
Tg was 66 ° C. from DSC measurement.
The weight average molecular weight of the obtained liquid crystalline polyacrylate 4 was Mw = 6890.
From the hot stage observation, a uniform nematic phase was observed at 150 ° C. or higher.

実施例1で得られた液晶性アクリル化合物3のH−NMRスペクトルを示す。横軸はテトラメチルシラン(TMS)基準の化学シフト(ppm)である。The 1 H-NMR spectrum of the liquid crystalline acrylic compound 3 obtained in Example 1 is shown. The horizontal axis represents the chemical shift (ppm) based on tetramethylsilane (TMS). 実施例2で得られた液晶性ポリアクリレート3のH−NMRスペクトルを示す。横軸はテトラメチルシラン(TMS)基準の化学シフト(ppm)である。The 1 H-NMR spectrum of the liquid crystalline polyacrylate 3 obtained in Example 2 is shown. The horizontal axis represents the chemical shift (ppm) based on tetramethylsilane (TMS). 実施例3で得られた液晶性ポリアクリレート4のH−NMRスペクトルを示す。横軸はテトラメチルシラン(TMS)基準の化学シフト(ppm)である。The 1 H-NMR spectrum of the liquid crystalline polyacrylate 4 obtained in Example 3 is shown. The horizontal axis represents the chemical shift (ppm) based on tetramethylsilane (TMS).

Claims (6)

式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物。
Figure 2006282579
(式(1)中、Rはメチル基または水素を表し、LおよびLはそれぞれ個別に単結合、−O−、−O−CO−、−CO−O−のいずれかを表し、Mは式(2)のいずれかの基を表し、mは1〜10の整数を表し、nは0〜11の整数を表す。)
Figure 2006282579
A (meth) acrylic compound having an alkoxynaphthyl group represented by the formula (1).
Figure 2006282579
(In the formula (1), R represents a methyl group or hydrogen, L 1 and L 2 each independently represent a single bond, —O—, —O—CO—, —CO—O—, and M Represents any group of formula (2), m represents an integer of 1 to 10, and n represents an integer of 0 to 11.)
Figure 2006282579
前記式(1)で表されるアルコキシナフチル基を有する(メタ)アクリル化合物から誘導される式(3)で表されるユニットを含む側鎖型液晶性ポリマー。
Figure 2006282579
(式(3)中、R、L、L、M、mおよびnは式(1)と同じである。)
The side chain type liquid crystalline polymer containing the unit represented by Formula (3) induced | guided | derived from the (meth) acrylic compound which has the alkoxy naphthyl group represented by said Formula (1).
Figure 2006282579
(In formula (3), R, L 1 , L 2 , M, m and n are the same as in formula (1).)
前記式(3)で示されるユニットを5〜100モル%含むことを特徴とする請求項2に記載の側鎖型液晶性ポリマー。   The side chain type liquid crystalline polymer according to claim 2, comprising 5 to 100 mol% of a unit represented by the formula (3). 重量平均分子量が2,000〜100,000であることを特徴とする請求項2または請求項3に記載の側鎖型液晶性ポリマー。   The side chain type liquid crystalline polymer according to claim 2 or 3, wherein the weight average molecular weight is 2,000 to 100,000. 請求項2〜4のいずれかの項に記載の側鎖型液晶性ポリマーを少なくとも10質量%以上含有することを特徴とする高分子液晶組成物。   A polymer liquid crystal composition comprising at least 10% by mass of the side chain type liquid crystalline polymer according to any one of claims 2 to 4. 光カチオン発生剤および/または熱カチオン発生剤を含むことを特徴とする請求項5に記載の高分子液晶組成物。   6. The polymer liquid crystal composition according to claim 5, comprising a photo cation generator and / or a thermal cation generator.
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