JP3228348B2 - Polymer liquid crystal compound, liquid crystal composition and liquid crystal element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer liquid crystal compound, a polymer liquid crystal composition, and a liquid crystal device using the same.

The polymer liquid crystal compound and the polymer liquid crystal composition of the present invention can be used as optoelectronic materials and optical device materials typified by displays and memories.

[0003]

2. Description of the Related Art As a conventional liquid crystal element, for example,
“Applied Physics Letters” by M. Schadt and W. Helfrich (“Applied Physic”).
Vol. 18, No. 4, Issued Feb. 15, 1971, pp. 127-128, "Voltage Dependent Optical Activity of a Twisted Nematic Liquid Crystal" (“Voltage Dependent
Optical Activity of a Twi
sted Nematic Liquid Cryst
al "), the twisted nematic (twi
A device using a liquid crystal (stable nematic) is known. However, the TN liquid crystal has a problem in that crosstalk occurs in time-division driving using a matrix electrode structure having a high pixel density, so that the number of pixels is limited.

In addition, applications as displays have been limited due to slow electric field response and poor viewing angle characteristics. Further, there is a problem that a process of forming a thin film transistor in each pixel is extremely complicated and it is difficult to form a large-area display element.

As an improvement over the conventional liquid crystal device, the use of a bistable liquid crystal device has been proposed by Clark and Lagerw.
all). (JP-A-56-107
No. 216, U.S. Pat. No. 4,367,924, etc.)
As the liquid crystal having the bistability, a ferroelectric liquid crystal having a chiral smectic C phase (Sm ^* C) or an H phase (Sm ^* H) is generally used. The ferroelectric liquid crystal has a very fast response speed because of spontaneous polarization, and can exhibit a bistable state with memory properties. Further, since the viewing angle characteristics are excellent, it is considered that the material is suitable as a display material having a large capacity and a large area. However, when actually forming a liquid crystal cell, it is difficult to form a monodomain over a wide area, and there is a technical problem in producing a large-screen display element.

Further, there is known an example in which a polymer liquid crystal is used as a memory medium. For example, V. Shibaev (V.
Shibaev), S. Kostromin (S. Kost)
romin), N. Pla'te,
S. Ivaov, V. Vestrov, I. Yakovlev (I.
"Polymer Communications", written by Yakovlev.
ns "), Vol. 24, pp. 364-365," Thermotropic Liquid Crystalline Polymers. 14 "
("Thermotropic Liquid Cry
stalline Polymers. 14 ").

However, this method has not been put to practical use due to the problems of poor contrast because of the use of light scattering for reading, and a delay in response speed due to polymerization.

Attempts have also been made to produce large-area liquid crystal devices using polymer liquid crystals, but the molecular weight is not sufficiently large, which has the disadvantage of hindering an increase in area.

On the other hand, attempts have been made to use polymer liquid crystals as optical thin films by utilizing the optical anisotropy of liquid crystals and the film properties of polymers. (Japanese Unexamined Patent Publication No. 63-303385, etc.) From the same concept, attempts have been made to use a polymer liquid crystal as an alignment film of a liquid crystal element. (Japanese Patent Laid-Open No. 2
However, in such an attempt, since the molecular weight of the polymer liquid crystal was not sufficiently large,
There is a drawback in that the film is not sufficiently formed to be warped or to be compatible with the liquid crystal.

[0010] In order to make up for such disadvantages, attempts have been made to use crosslinked polymer liquid crystals. [polymer
Science and Technology (Plenum) 198
However, since the structure of the cross-linking component is different from that of the liquid crystal, there is a disadvantage that the liquid crystallinity is hindered.

[0011]

DISCLOSURE OF THE INVENTION The present invention has found a novel reactive liquid crystalline compound which avoids such disadvantages of the prior art, and uses the reactive liquid crystalline compound to form a film. Excellent, good responsiveness, a large-area liquid crystal element is possible, and it is also possible to obtain an electro-optical thin film having excellent optical characteristics, a polymer liquid crystal compound using the compound, a polymer composition It is an object of the present invention to provide a used liquid crystal element.

[0012]

That is, a first invention of the present invention is a reactive liquid crystalline compound represented by the following general formula [1]:
Is a polymer liquid crystal compound having a polymer component .

[0013]

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(In the formula, R ¹ represents a hydrogen atom, an alkyl group or a halogen group. U, V, W, X and Y are the same or different and are each a single bond, -O-, -OCO- or -COO- A represents 0 or 1. b,
f represents the same or different integers from 0 to 15; c, d and e are the same or different 0
Represents an integer from 1 to 2. )

The second invention of the present invention is a polymer liquid crystal composition containing the polymer liquid crystal compound of the first invention .

The third invention of the present invention relates to a polymer liquid crystal composition containing a polymer liquid crystal compound obtainable by using a liquid crystal compound having a structure represented by the general formula [1]. A liquid crystal element characterized by being used.

Hereinafter, the present invention will be described in detail. The reactive liquid crystalline compound used in the first invention of the present invention is a compound having a structure represented by the general formula [1]. In the general formula [1], both terminals are reactive functional groups,
The vicinity of the center is a mesogen, and what connects the mesogen and the reactive functional group is a flexible spacer. Specific examples of the reactive liquid crystal compound include a compound represented by the following structure.

[0018]

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[0019]

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[0020]

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[0021]

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Needless to say, the reactive liquid crystalline compound of the present invention is not limited to the above specific examples. A method for synthesizing a typical reactive liquid crystalline compound of the present invention is described below.

[0023]

Embedded image DCC stands for dicyclocarboximide.

Next, the polymer liquid crystal compound of the first invention of the present invention is a polymer liquid crystal compound having a reactive liquid crystal compound having a structure represented by the general formula [1] as a polymerization component. As a method for producing the polymer liquid crystal compound, there is generally mentioned a method of polymerizing a reactive liquid crystal compound represented by the general formula [1] with another reactive liquid crystal compound. Specific production methods include the following methods, but, of course, are not limited to the following methods.

1) A method in which a reactive liquid crystalline compound having a polymerizable functional group and a compound having a structure represented by the general formula [1] are obtained by performing radical polymerization or ionic polymerization in a solution state. 2) A polymer having a main chain having a reactive site is graft-polymerized with a reactive liquid crystalline compound having a functional group reactive with the polymer and a compound having a structure represented by the general formula [1]. How to get in response to. 3) A reactive liquid crystalline compound having a polymerizable functional group and a compound having a structure represented by the general formula [1] undergo a polymerization reaction by performing UV irradiation or the like in a liquid crystal state, a molten state, a solid state, or a solution state. How to get.

In the polymer liquid crystal compound of the present invention, the reactive liquid crystal having the structure represented by the general formula [1] is used in an arbitrary ratio. In addition, a reactive compound having no liquid crystallinity can be copolymerized and used. Functional compounds such as reactive dyes may be copolymerized and used.

Specific examples of the other reactive liquid crystalline compounds used in the above polymerization methods 1) to 3) include the following compounds, but are not limited to the following compounds.

[0028]

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[0029]

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[0030]

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Specific examples of the high molecular compound having a main chain having a reactive site used in the polymerization method 2) include a compound having a repeating unit shown below.

[0032]

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In the case of (E), it can be produced by graft-reacting a liquid crystal compound having a vinyl group in the presence of a catalyst. Similarly, in the case of (F) and (G),
It can be produced by reacting a liquid crystalline compound having a reactive functional group in a graft manner.

The number average molecular weight of the high-molecular liquid crystal compound of the present invention is from 2,000 to 10,000,000, preferably from 20,000 in view of sufficient film properties and stable film properties.
00 to 10,000,000.

Next, a second invention of the present invention is a polymer liquid crystal composition containing the polymer liquid crystal compound of the first invention . Other components contained in the polymer liquid crystal composition include a low molecular compound, a low molecular liquid crystal compound, a high molecular compound, a high molecular liquid crystal compound and the like. Further, it may contain a dye, a stabilizer, a UV absorber and the like.

Specific examples of the low-molecular liquid crystal compound include the following, but are not limited to the following.

[0037]

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[0038]

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[0039]

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[0040]

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[0041]

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[0042]

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[0043]

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[0044]

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(20) Merck Z-1625 nematic temperature range -10 to 60 ° C (21) BDH E-7 nematic temperature range -10 to 60 ° C (22) Roche R-200 nematic temperature range 0 to 65 ° C (23) Dainippon Ink D-X01A Nematic Temperature Range -26 to 68 ° C (24) Merck ZLI-2008 Tcl =
64 ° C. (25) Merck ZLI-1840 Tcl =
90 ° C (26) DIC TN403 Tcl =
82 ° C

Specific examples of the polymer liquid crystal compound include , but are not limited to, the following.

(In the following formulas (31) to (43), 15> n
≧ 1. )

[0048]

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[0049]

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(In the following formulas (44) to (46), p = 5 to
1000, p ₁ + p ₂ = 5 to 1000, q = 1 to 1
6, q ₁ = _{1 to} 16, and q ₂ = _{1 to} 16. )

[0051]

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(In the formulas (45) and (46), R represents 1 carbon atom.
And 12 to 12 alkyl groups or alkoxy groups. (In the following formulas (47) to (75), * indicates an asymmetric carbon center, and n is 5 to 1000.)

[0053]

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[0054]

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[0055]

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[0056]

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[0057]

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[0058]

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[0059]

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[0060]

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[0061]

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The content of the polymer liquid crystal compound in the polymer liquid crystal composition of the present invention is usually 5 wt% or more, preferably 10 wt% or more. If it is less than 5 wt%, sufficient film properties and stable film properties may not be obtained.

The polymer liquid crystal compound of the first invention of the present invention,
When the polymer liquid crystal composition of the second invention exhibits a nematic liquid crystal phase, it can be used for a liquid crystal element using the same switching mode as a conventional TN liquid crystal. In the case of showing a chiral smectic liquid crystal phase, it can be used for a liquid crystal element using a ferroelectric switching mode having bistability. Further, it can be used in a liquid crystal element or as a liquid crystal element as an electro-optic thin film having the electro-optic property of a nematic liquid crystal phase or a smectic liquid crystal phase with a fixed orientation.

The third invention of the present invention relates to a polymer liquid crystal composition containing a polymer liquid crystal compound obtainable by using a liquid crystal compound having a structure represented by the general formula [1]. This is the liquid crystal element used.

One example of the polymer liquid crystal device of the present invention is a method of coating the polymer liquid crystal compound or the polymer liquid crystal composition of the present invention on a substrate made of any material such as glass, plastic or metal. A film is formed, but I
A transparent electrode such as a TO film or a patterned electrode can be formed.

FIGS. 1A and 1B show an example of the polymer liquid crystal device of the present invention. FIG. 1A is a plan view of the polymer liquid crystal device of the present invention, and FIG. FIG.
FIG. 1 shows an example in which the polymer liquid crystal compound of the present invention is applied to a display device.

In FIG. 1, the polymer liquid crystal device of the present invention has a pair of substrates 1 and 1 'made of a glass plate or a plastic plate (at least one of the substrates has birefringence).
Are held at predetermined intervals by spacers 4 and have a cell structure bonded with an adhesive 6 to seal the pair of substrates 1 and 1 ′. (For example, a scanning voltage application electrode group in a matrix electrode structure) is formed in a predetermined pattern such as a strip pattern. Also, the substrate 1 '
An electrode group (for example, a signal voltage application electrode group in a matrix electrode structure) formed of a plurality of transparent electrodes 2 ′ crossing the above-mentioned transparent electrode 2 is formed on the substrate.

The substrates 1, 1 'on which such transparent electrodes 2, 2' are provided include, for example, silicon monoxide, silicon dioxide, aluminum oxide, zirconia, magnesium fluoride, cerium oxide, cerium fluoride, silicon nitride. Material, silicon carbide, boron nitride and other inorganic insulating materials, polyvinyl alcohol, polyimide, polyamide imide, polyester imide, polyparaxylerin, polyester, polycarbonate, polyvinyl acetal, polyvinyl chloride, polyamide, polystyrene, cellulose resin, melamine resin Orientation control films 5, 5 'formed by using an organic insulating material such as urea resin or acrylic resin can be provided.

The orientation control films 5 and 5 'are obtained by forming a film of the above-mentioned inorganic insulating material or organic insulating material and then rubbing the surface thereof in one direction with velvet, cloth or paper. Can be In another preferred embodiment of the present invention, the substrate 1 of an inorganic insulating material such as SiO or SiO _2,
The orientation control films 5, 5 'can be obtained by forming a film on 1' by oblique evaporation.

In another embodiment, the surface of the substrate 1, 1 'made of glass or plastic or the substrate 1, 1'
After a film of the above-mentioned inorganic insulating material or organic insulating material is formed thereon, the surface of the film is etched by an oblique etching method, whereby an orientation control effect can be imparted to the surface.

It is preferable that the alignment control films 5 and 5 'also function as an insulating film at the same time. Therefore, the thickness of the alignment control film is generally set in the range of 100 to 1 μm, preferably 500 to 5000 °. can do. This insulating layer also has the advantage of preventing the generation of current generated due to impurities and the like contained in the polymer liquid crystal layer 3 in a very small amount. Therefore, the liquid crystal compound does not deteriorate even if the operation is repeated. .

In the polymer liquid crystal device of the present invention, an alignment control film may be provided only on one side of the substrate 1 or the substrate 1 'in contact with the polymer liquid crystal layer containing the polymer liquid crystal compound.

The polymer liquid crystal compound and the composition thereof can obtain good alignment not only by the alignment method using an alignment film but also by the following alignment method. As a method for ensuring the molecular arrangement, a stretching method such as uniaxial stretching, biaxial stretching, or inflation stretching, or rearrangement by shearing is preferable. Those which do not have film properties by themselves and are difficult to stretch can be co-stretched by sandwiching them with a film to obtain a desired orientation.

Next, examples of polymer films that can be used as the substrates 1 and 1 'include, but are not limited to, the following. That is, low-density polyethylene film, high-density polyethylene film (Mitsui Toatsu Chemical Hiblon, etc.), polypropylene film (Toray Trefane, etc.), polyester film (DuPont Mylar, etc.), polyvinyl alcohol film (Nippon Synthetic Chemical Industry, Hiselon, etc.), polyamide Film (Toyo Gosei Film Reifan, etc.),
Polycarbonate film (Teijin Teijin Panlite etc.), Polyimide film (Dupont KAPTON)
Etc.), polyvinyl chloride film (Mitsubishi Hishilex, etc.), polytetrafluoroethylene film (Mitsui Fluorochemical Teflon, etc.), polyacryl film (Sumitomo Bakelite Sumilite), polystyrene film (Asahi Dow Stylosheet), polyvinylidene chloride Film (Asahi Dow Saran Film), cellulose film, polyvinyl fluoride film (Dupont Tedlar) and the like.

In the present invention, a polarizing film, a polarizing beam splitter or the like can be used as the polarizers 7 and 7 '.

In the polymer liquid crystal display device of the present invention, when performing display using the effect of heating, a thermal head or a laser beam can be used.

As the laser light, gas lasers such as He—Ne gas laser, Ar ²⁺ gas laser, N ₂ gas laser, ruby laser, glass laser, YAG
It is desirable to use a solid laser such as a laser, a semiconductor laser, or the like. Further, a semiconductor laser having a wavelength range of 600 nm to 1600 nm is preferably used. Particularly preferably, a semiconductor laser having a wavelength range of 600 to 900 nm is used. The use of the second and third harmonics of these laser beams makes it possible to shorten the wavelength.

When a laser beam is used, a light absorbing layer is separately provided, or the light absorbing layer is dispersed and dissolved in a display layer. When the display surface is affected by the light absorbing layer or the light absorbing agent, it is desirable that the light absorbing layer or the light absorbing agent does not absorb light in the visible light region.

Examples of the laser light absorbing compound to be added to the polymer liquid crystal layer include an azo compound, a bisazo compound,
Trisazo compounds, anthraquinone compounds, naphthoquinone compounds, phthalocyanine compounds, naphthalocyanine compounds, tetrabenzoporphyrin compounds,
There are aminium salt compounds, diimonium salt compounds, metal chelate compounds and the like.

Of the above-mentioned laser light absorbing compounds, compounds for semiconductor lasers have absorption in the near infrared region, are useful as stable light absorbing dyes, and have good compatibility or dispersibility with high molecular liquid crystal compounds. In addition, some have dichroism, and if these dichroic compounds are mixed in a polymer liquid crystal, a thermally stable host-guest type memory and display medium can be obtained. . Further, the polymer liquid crystal compound may contain two or more of the above compounds.

Further, the above compound may be combined with other near infrared absorbing dyes or dichroic dyes. Representative examples of near infrared absorbing dyes that are suitably combined include cyanine, merocyanine, phthalocyanine, tetrahydrocholine, dioxazine, anthraquinone, triphenodithiazine, xanthene, triphenylmethane, pyrylium, croconium, azulene and triphenylamine. And the like.

The amount of the compound to be added to the polymer liquid crystal compound is about 0.1 to 20% by weight, preferably 0.5 to 10%.

The above polymer liquid crystal device can use the same switching mode as a conventional TN type liquid crystal when exhibiting a nematic liquid crystal phase, and can exhibit bistable ferroelectricity when exhibiting a chiral smectic liquid crystal phase. A switching mode can be used. When a chiral smectic liquid crystal phase is used and a ferroelectric switching mode is used, it is necessary to eliminate the helix in order to realize bistability in the device, and for that purpose, the film thickness must be made sufficiently thin. is there. Specifically, the thickness may be set to 10 μm or less.

Another typical example of the liquid crystal device according to the fourth aspect of the present invention is a thin film utilizing the electrical and optical anisotropy of a fixed orientation and utilizing the thin film. Element.

Such a thin film is formed, for example, by reacting the compound having the structure represented by the general formula [1] of the first invention of the present invention with a reactive liquid crystalline compound such as a) to w) shown above. A liquid crystal composition containing a compound is rubbed with a polyimide rubbing film or SiO ₂
It can be obtained by applying the composition on a substrate having an orientation control film such as an oblique deposition film, orienting it in a liquid crystal state, and then irradiating ultraviolet rays or the like and polymerizing and curing. Additives such as a photoinitiator, a dye and an antioxidant can be added to the liquid crystal composition containing the compound having the structure represented by the general formula [1] and other reactive liquid crystal compounds.

Since such a thin film has a large birefringence due to the optical characteristics of the liquid crystal, a polarizing plate,
It can be used for a quarter-wave plate, an optical recording medium, and the like.
By masking at the time of exposure, patterning is possible, and it can be used as an optical waveguide. Since the film thickness can be made extremely thin as compared with an optical thin film usually used, there is an advantage that the transmittance is remarkably large, and the application range is very wide.

[0087]

The reactive liquid crystalline compound having a structure represented by the general formula [1] of the present invention is a bifunctional, cross-linkable compound having a chemical structure with high liquid crystallinity, and has a molecular long axis. It has a large polar group of two cyano groups in the vertical direction. For this reason, the use of the reactive liquid crystal compound makes it possible to make the polymer liquid crystal compound crosslinked and polymerized without impairing the liquid crystallinity. Further, an electro-optical thin film having excellent characteristics can be easily produced.

[0088]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.

Synthesis Example 1

[0090]

Embedded image Synthesis of

13.6 g of 6-chloro-hexanol
And 11.0 g of p-hydroxybenzoic acid were heated and refluxed together with KOH in an aqueous ethanol solution for 10 hours. Dilute hydrochloric acid was added, and the precipitate was collected by filtration. Recrystallization from ethanol yielded 9.5 g of p- (6-hydroxyhexyloxy) benzoic acid (a).

9.5 g of p- (6-hydroxyhexyloxy) benzoic acid (a) and 10.0 g of acrylic acid were added with sulfuric acid in toluene in the presence of hydroquinone to give 50 g.
Heated to reflux for an hour. The solvent was distilled off, recrystallized, and p-
8.1 g of (6-acryloyloxyhexyloxy) benzoic acid (b) was obtained.

3.5 g of p- (6-acryloyloxyhexyloxy) benzoic acid (b) was heated to reflux in 5 ml of thionyl chloride and 20 ml of toluene for 2 hours in the presence of 2,6-di-t-butylphenol. To this, 10 ml of anhydrous THF and 1 ml of anhydrous pyridine were added, and 0 to 5 ° C was added.
Then, a solution of 1.0 g of 2,3-dicyano-p-hydroquinone in anhydrous THF was added. 1 hour at 5 ° C, 1 hour at room temperature,
Stirred at 50 ° C. for 15 hours. Dilute hydrochloric acid was added, followed by continuous extraction with ethyl acetate. The solvent was distilled off, and the residue was purified by column chromatography to obtain 2.1 g of the desired compound (I). FIG. 2 shows the IR spectrum of the compound (I).

Example 1 0.046 g of the compound (I) obtained in Synthesis Example 1 and 1.00 g of the compound (II) represented by the following structure were mixed with DMF.
The polymerization was carried out at 55 ° C. for 40 hours using AIBN as a polymerization initiator (II).

[0095]

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The reprecipitation was repeated in methanol to obtain 0.72 g of a polymer (2a).

Mn = 26,300 Mw = 102,200 (measured by GPC) Phase transition temperature

[0098]

(Equation 1)

The ¹ H-NMR of the polymer (2a) is shown in FIG.

Example 2 0.057 g of compound (I) and 1.00 g of compound (II)
Was subjected to a polymerization reaction in the same manner as in Example 1 . Purification was performed in the same manner to obtain 0.68 g of a polymer (3a).

Mn = 31,600 Mw = 129,500 Phase transition temperature

[0102]

(Equation 2) ¹ H-NMR of the polymer (3a) is shown in FIG.

Comparative Example 1 1.00 g of the compound (II) was polymerized and purified in the same manner as in Example 1 to obtain a polymer A.

Mn = 12,400 Mw = 21,000 Phase transition temperature

[0105]

(Equation 3)

Example 3 A 7 wt% DMF solution of the polymers (2a) and (3a) was applied to a glass substrate provided with a polyimide rubbing film. 100
After drying and annealing at 40 ° C. for 40 hours, polymers (2a) and (3a) were obtained as uniformly oriented thin films without irregularities.

Comparative Example 2 For polymer A, as in Example 3 , 7 wt% DMF
The solution was applied to a glass substrate with a polyimide rubbing film.
After drying and annealing at 100 ° C for 40 hours,
Unlike the polymers (2a) and (3a), wrinkles were observed at several places.

Example 4 The following components

[0109]

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Was melted and applied to a glass substrate provided with a polyimide rubbing film. The film was held in a nematic liquid crystal state and was uniaxially oriented. When irradiated with a 150 W ultraviolet lamp from a distance of 30 cm and polymerized and cured, a thin film having uniform uniaxial orientation was obtained.

Example 5 The polymer (2a) obtained in Example 1 and the compound (II)
Was used to prepare the two compositions shown in Table 1 below.

[0112]

[Table 1]

The polymer (2a), the three compounds of X and Y, and the composition were respectively applied to an ITO transparent electrode substrate on which a polyimide rubbing alignment film was formed, and ITO was applied from the upper surface.
The transparent electrode substrate was brought into close contact to form a cell. When an AC electric field of 20 V / μm was turned on and off in the nematic phase, a response of molecules following the electric field was observed under a polarizing microscope.

[0114]

As has been described above, according to the present invention, according to the present invention, the anti
By using a polymer liquid crystal compound and a polymer composition using a responsive liquid crystal compound, it is possible to realize a large-area liquid crystal device with excellent film properties, good responsiveness, and improved optical characteristics. There is an effect that an excellent electro-optical thin film can be obtained.

[Brief description of the drawings]

FIG. 1 shows an example of a polymer liquid crystal device of the present invention.
(A) is a plan view of the polymer liquid crystal device of the present invention, and FIG.
Is a sectional view taken along the line AA '.

FIG. 2 is an IR spectrum of Compound (I) of Synthesis Example 1 .

FIG. 3 ¹ H-NMR of polymer (2a) of Example 1
Is a diagram showing a (CDCl _3).

FIG. 4 shows ¹ H-NMR of polymer (3a) of Example 2 .
Is a diagram showing a (CDCl _3).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 'Substrate 2, 2' Transparent electrode 3 Polymer liquid crystal layer 4 Spacer 5, 5 'Orientation control film 6 Adhesive 7, 7' Polarizer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // C07C 255/55 C07C 255/55 (72) Inventor Takeo Eguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References Table 2-502099 (JP, A) CHEM. SOC. PERKIN TRANS. 1 (1990) No. 8, p. 116-1177 (58) Fields investigated (Int. Cl. ⁷ , DB name) CA (STN) CAOLD (STN) REGISTRY (STN)

Claims (4)

(57) [Claims] 1. A polymer liquid crystal compound having a reactive liquid crystal compound represented by the following general formula [1] as a polymerization component. Embedded image (Wherein, R ¹ represents a hydrogen atom, an alkyl group, or a halogen group. U, V, W, X, and Y are the same or different and are each a single bond, —O—, —OCO—, or —COO—
Represents a represents 0 or 1. b and f represent the same or different integers from 0 to 15.
c, d, and e each represent the same or different integers from 0 to 2. ) 2. A nematic polymer liquid crystal compound having a reactive liquid crystal compound represented by the following general formula [1] as a polymerization component. Embedded image (Wherein, R ¹ represents a hydrogen atom, an alkyl group, or a halogen group. U, V, W, X, and Y are the same or different, a single bond, —O—, —OCO—, or —COO—
Represents a represents 0 or 1. b and f represent the same or different integers from 0 to 15.
c, d, and e each represent the same or different integers from 0 to 2. ) 3. A polymer liquid crystal composition comprising the polymer liquid crystal compound according to claim 1. 4. A liquid crystal device comprising the polymer liquid crystal composition according to claim 3.