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Mixture of monomer and liquid crystal, polymer/liquid crystal composite material and liquid crystal element

A mixture and liquid crystal technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as uneven concentration

Inactive Publication Date: 2013-06-19
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, it is preferable that the N of the mixture of the monomer and the liquid crystal * -Polymerization is often carried out near the BP transition temperature, but concentration unevenness may be observed in composite materials of polymers and liquid crystals obtained by polymerization near this temperature

Method used

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  • Mixture of monomer and liquid crystal, polymer/liquid crystal composite material and liquid crystal element
  • Mixture of monomer and liquid crystal, polymer/liquid crystal composite material and liquid crystal element
  • Mixture of monomer and liquid crystal, polymer/liquid crystal composite material and liquid crystal element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0206] Preparation of compound (2-1)

[0207]

[0208] A base is used to etherify a phenol derivative and a halogen derivative, and an appropriate formyl chloride is allowed to act on the obtained compound to obtain the target compound.

[0209] In the formula, R a It has the meaning given by formula (2-1), and n is 1-30.

[0210] Preparation of compound (2-2)

[0211]

[0212] Hydrogen reduction is performed using a catalyst such as palladium in a compound obtained by acting on a Wittig reagent corresponding to a derivative of benzaldehyde. Next, an alcohol derivative is obtained by allowing a reducing agent such as LAH to act on the aldehyde derivative obtained by deprotecting the protecting group. Finally, the desired compound can be obtained by reacting the alcohol derivative with an appropriate formyl chloride.

[0213] In the formula, R a It has the meaning given by formula (2-2), and n is 1-30.

[0214] Preparation of compound (2-3)

[0215]

[0216] ...

example

[0281] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples.

[0282] In the examples of this specification, I represents the non-liquid crystal isotropic phase, N represents the nematic phase, and N * Indicates a chiral nematic phase, BP indicates a blue phase, and BPX indicates an optically isotropic liquid crystal phase in which diffracted light of two or more colors is not observed. In this specification, the I-N phase transition point is sometimes referred to as the N-I point. sometimes I-N * The phase transition point is called N * -I point. The I-BP phase transition point is sometimes referred to as the BP-I point.

[0283] Synthesis examples of monofunctional monomers used in the present invention are shown below.

example 1

[0284] Example 1: Synthesis of 8-(4-pentylphenoxy)-octyl acrylate

[0285]

[0286] 4-amylphenol (24.3g, 148.2mmol) was dissolved in dimethylformamide (Dimethylformamide, DMF) (100ml), then 8-chlorooctyl alcohol (24.4g, 148.2mmol), potassium carbonate (41.0g , 296.4mmol), and heated and stirred at 80° C. for 30 hours under a nitrogen atmosphere. After completion of the reaction, water was added to further make the solution acidic, and then toluene was added for extraction. After washing with water and a saturated aqueous sodium chloride solution, it was dried over anhydrous magnesium sulfate, and the solvent was concentrated under reduced pressure. Purification was carried out by silica gel column chromatography to obtain compound (S-01) (28.3 g, 65%).

[0287] Compound (S-01) (15.0 g, 51.3 mmol) was dissolved in tetrahydrofuran (THF) (130 ml), and then triethylamine (8.6 ml, 61.6 mmol) was added. After cooling to 0°C, acryloyl chloride (5.0ml, 61.6mmol) was added dropwi...

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Abstract

The invention provides a mixture of monomer and liquid crystal to improve a uneven concentration case of a polymer / liquid crystal composite material. Thus, the invention provides a liquid crystal element, which is made of the polymer / liquid crystal composite material obtained by polymerizing the mixture of monomer and liquid crystal. The mixture of monomer and liquid crystal is characterized in that: the polymer / liquid crystal composite material is obtained by mixing more than one kind of polymerized monomer represented by a general formula (1) into an optical isotropic liquid crystal compositions containing a non-Chiral liquid crystal component A and a chiral compound k. In the formula (1), such as Ra represents straight chain alkyl with 1~30 carbon atoms, Rb represents straight chain subalkyl with 1~30 carbon atoms, ring A1 represents 1,4-phenylene, X1 represents -O-,P1 represents acryloyl.

Description

technical field [0001] The invention relates to a mixture of a monomer containing a monofunctional monocyclic monomer and a liquid crystal, a composite material of a polymer and a liquid crystal, and a liquid crystal element. Background technique [0002] Similar to the isotropic phase in the nematic liquid crystal material (hereinafter sometimes referred to as "non-liquid crystal isotropic phase"), in the blue phase, which is a kind of optically isotropic liquid crystal phase, electric bipolarity is also observed. Refraction value (birefringence value caused when an electric field is applied to an isotropic medium) Δn E A phenomenon proportional to the square of the electric field E, the Kerr effect [Δn E =KλE 2 (K: Kerr coefficient (Kerr constant), λ: wavelength)]. [0003] In recent years, the mode in which electric birefringence is manifested by applying an electric field to an optically isotropic liquid crystal phase such as a blue phase and a polymer-stabilized blue...

Claims

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Application Information

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IPC IPC(8): C09K19/52G02F1/1343
Inventor 高田章博佐郷弘毅
Owner JNC CORP
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