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Nematic liquid crystal composition

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., which can solve the problems of low viscosity and achieve the effects of low rotational viscosity, high reliability and excellent liquid crystallinity

Active Publication Date: 2015-03-11
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these liquid crystal compositions have not yet achieved sufficiently low viscosity

Method used

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  • Nematic liquid crystal composition
  • Nematic liquid crystal composition
  • Nematic liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、 comparative example 1 and comparative example 2

[0152] The physical property values ​​of the prepared liquid crystal composition of the present invention (real 1) and the liquid crystal compositions prepared for comparison (ratio 1) and (ratio 2) are shown below.

[0153] [Table 2]

[0154]

[0155] The compositions of (ratio 1) and (ratio 2) do not contain the compound represented by the general formula (LCO). The composition of (Example 1) has a very low viscosity and good storage stability at -25°C, so it can provide a liquid crystal display device having a stable nematic phase in a low temperature range, and it can be seen that the combination of the present invention is very excellent.

Embodiment 2

[0157] The prepared liquid crystal composition and its physical property values ​​are shown below.

[0158] [table 3]

[0159]

Embodiment 3

[0161] The prepared liquid crystal composition and its physical property values ​​are shown below.

[0162] [Table 4]

[0163]

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PUM

PropertyMeasurementUnit
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Abstract

Provided is a liquid crystal composition with positive dielectric anisotropy, as a liquid crystal composition that: neither reduces nor increases a refractive index anisotropic and nematic phase isotropic liquid phase transition temperature; has sufficiently low viscosity; and has positive dielectric anisotropy, with no display defects. The liquid crystal composition contains one or more types of compounds selected from the compounds represented by general formula (LC0); contains one or more types of compounds selected from the group of compounds represented by general formula (LC1) to general formula (LC5); and further contains one or more types of compounds in which at least one of A21 to A42 present in general formula (LC2) to general formula (LC4) is a tetrahydropyran-2,5-diyl group.

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a positive dielectric constant anisotropy (Δε) useful as an electro-optic liquid crystal display material. Background technique [0002] Liquid crystal display devices are used in various measuring instruments represented by clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, and advertising display boards. As liquid crystal display methods, there are TN (twisted nematic) type, STN (super twisted nematic) type, VA type characterized by vertical alignment using TFT (thin film transistor), and IPS (in-plane display) characterized by horizontal alignment. Conversion) type / FFS type, etc. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external factors such as moisture, air, heat, light, etc., and to display a liquid crystal phase as much as possibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/42C09K19/12C09K19/14C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34G02F1/13
CPCC09K2019/3021C09K2019/3063C09K2019/3037C09K19/322C09K19/3059C09K2019/0466C09K19/44C09K2019/304C09K2019/3015C09K19/42C09K2019/3077C09K2019/3422C09K2019/3036C09K19/2014C09K2019/123C09K2019/3004C09K2019/301C09K2019/3016C09K2019/3019G02F1/13706C09K19/0208C09K19/0216C09K19/3402C09K19/542C09K19/56
Inventor 金亲昌和竹内清文大泽政志东条健太楠本哲生
Owner DIC CORP