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Method for producing liquid crystal composition

A technology of liquid crystal composition and manufacturing method, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as excessive investment, inability to completely eliminate adverse effects, and achieve high reliability and less variation in physical property values. , the effect of less generation of impurities

Active Publication Date: 2012-12-05
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the method described in the cited document can be manufactured at a relatively low temperature, heating is required, and the adverse effects caused by heating cannot be completely eliminated, and auxiliary equipment for heating is also necessary.
[0005] In addition, the method described in the cited document has the problem that a large-scale device accompanied by decompression is necessary
In this way, to manufacture liquid crystal compositions under reduced pressure, in order to meet the needs of enlarged equipment and increased liquid crystal compositions, there is nothing to do with excessive investment.

Method used

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  • Method for producing liquid crystal composition
  • Method for producing liquid crystal composition
  • Method for producing liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (Example 1) Manufacture of Liquid Crystal Composition

[0039] The manufacture of the liquid crystal composition (STN1, liquid crystal upper limit temperature 95.1 degreeC) which consists of the following compounds was performed. [Chem 2]

[0040]

[0041] Weigh each of the above-mentioned compounds in the recorded amount, and place them in a 150-milliliter detachable flask. The detachable flask was placed in a microwave generator, irradiated with microwaves at a power of 1 kW, and heated. After 10 minutes of irradiation, the irradiation of microwaves was stopped, the detachable flask was cooled, and it was taken out from the microwave irradiation apparatus to obtain 100 g of STN1 in a nematic liquid crystal state.

[0042] Measure the specific resistance of the prepared liquid crystal composition, which is 1.1×10 11 Ω cm. In addition, when the prepared liquid crystal composition was analyzed by a gas chromatograph, no substance other than the complex compound wa...

Embodiment 2

[0052] (Example 2) Manufacture of Liquid Crystal Composition

[0053] The manufacture of the liquid crystal composition (TFT1, liquid crystal upper limit temperature 68.0 degreeC) which consists of the following compounds was performed.

[0054] [Chem 3]

[0055]

[0056] Weigh each of the above-mentioned compounds in the recorded amount, and place them in a 150-milliliter detachable flask. The detachable flask was placed in a microwave generator, irradiated with microwaves at a power of 1 kW, and heated. After 10 minutes of irradiation, the irradiation of microwaves was stopped, the detachable flask was cooled, and it was taken out from the microwave irradiation apparatus to obtain 100 g of TFT1 in a nematic liquid crystal state.

[0057] Measure the specific resistance of the prepared liquid crystal composition, which is 1.5×10 14 Ω cm. In addition, the prepared liquid crystal composition was analyzed by a gas chromatograph, and as a result, no substances other than t...

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Abstract

Disclosed is a method for producing a liquid crystal composition which is useful as a constituting member of a liquid crystal display device. This method for producing a liquid crystal composition is characterized in that two or more kinds of liquid crystal compounds, at least one of which has a melting point higher than 30°C, are irradiated with a microwave. This method for producing a liquid crystal composition enables to efficiently produce a liquid crystal composition wherein two or more kinds of liquid crystal compounds are mixed in a short time. A liquid crystal composition produced by this method has high reliability from the viewpoint of specific resistance.

Description

technical field [0001] The present invention relates to a method for producing a liquid crystal composition useful as a component of a liquid crystal display element. Background technique [0002] Liquid crystal display elements are used in various measuring instruments represented by clocks and desktop computers, display panels for automobiles, word processors, electronic notebooks, printers, computers, televisions, etc. As the liquid crystal display method, the representative TN (twisted nematic) type, STN (super twisted nematic) type, DS (dynamic light scattering) type, GH (guest-host) type or FLC (ferroelectric) type capable of high-speed response can be mentioned. LCD), etc. Moreover, as a driving method, it has also changed from the previous static driving to a common multi-channel driving; furthermore, a simple matrix method and recently an active matrix method are being put into practical use. [0003] The liquid crystal composition used in these occasions is usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/137G02F1/13C09K19/02C09K19/18
CPCC09K19/2007C09K19/3068C09K19/46C09K19/18C09K19/3059C09K19/00C09K19/02
Inventor 栗泽和树金亲昌和小谷邦彦
Owner DIC CORP