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Polymerizable liquid crystal composition

A technology of polymerizable liquid crystal and composition, applied in liquid crystal materials, nonlinear optics, instruments, etc., can solve the problems of narrow viewing angle, light-dark contrast ratio, large phase retardation change, etc.

Inactive Publication Date: 2014-07-02
DONGJIN SEMICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, twisted nematic (TN) liquid crystals have a large change in phase retardation depending on the direction of light, and thus have disadvantages of narrow viewing angle and contrast ratio (CR) characteristics

Method used

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  • Polymerizable liquid crystal composition
  • Polymerizable liquid crystal composition
  • Polymerizable liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of 4,4'-bis(acryloyloxy)biphenyl (4,4'-bis(acryloyloxy)biphenyl)

[0049] Add acrylic acid (23.2g, 0.321mol) and dichloromethane (200ml) into a 500mL round bottom flask equipped with an ice bath, and add two drops of DMF dropwise. Then, oxalyl chloride (oxalic chloride) (40.8 g, 0.321 mol) was slowly added thereto, followed by stirring at room temperature for 6 hours. After adding triethylamine (40 g, 0.327 mol) and 4,4'-biphenyl (10 g, 0.053 mol), the reaction was carried out at room temperature for 24 hours. The solvent of the reaction mixture was evaporated and separated by column chromatography (n-hexene:ethyl acetate=10:1) to obtain a white solid compound.

Embodiment 2

[0051] In this example, the characteristics when the polymerizable liquid crystal composition of the present invention is used for an optical film will be understood.

[0052] In this embodiment, a polymerizable liquid crystal composition comprising the following composition is mixed:

[0053] The following polymeric mesogen compound (1) 60.0wt%;

[0054]

[0055] The following polymeric mesogen compound (2) 30.0wt%;

[0056]

[0057] 5.0 wt% of the following liquid crystal compound (3) prepared in Example 1; and

[0058]

[0059] Photoinitiator (Irgacure 907, manufactured by Ciba Geigy AG) 5.0 wt%.

[0060] Above-mentioned compound (1) is obtained by the method described in WO93 / 22397; Above-mentioned compound (2) is obtained by the method described in European Patent No. EP0331233B1; Above-mentioned photoinitiator Irgacure907 has following chemical formula:

[0061]

[0062] In order to utilize the above-mentioned polymerizable liquid crystal composition to pr...

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PUM

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Abstract

The present invention relates to a polymerizable liquid crystal composition, and more specifically, to a polymerizable liquid crystal composition which exhibits thermal stability and has a wide temperature range of a liquid crystal phase region if used in an optical film and is effective with respect to costs. The present invention is a polymerizable liquid crystal composition formed by mixing a polymerizable mesogenic compound with a liquid crystal compound in which a core structure does not have a connecting group and the liquid crystal compound has one or more cyclic structures connected by a single bond or a polycyclic structure, thereby showing excellent compatibility between liquid crystal materials and chemical stability, and maintaining a liquid crystal phase over a wide temperature range. In addition, it is possible to manufacture an optical film having excellent alignment and chemical resistance when using the polymerizable liquid crystal composition in a liquid crystal optical film. Further, the polymerizable liquid crystal composition is effective with respect to costs since a preparation method thereof is relatively simple.

Description

technical field [0001] The present invention relates to a polymerizable liquid crystal composition, and more particularly, to a cost-effective polymerizable liquid crystal composition having the characteristics of thermal stability and a wide temperature range of the liquid crystal phase region when used on an optical film thing. Background technique [0002] In recent years, with the rapid development of the information and communication field, the importance of displays for displaying various information has increased. However, there is a certain limit in the cathode ray tube (Cathode Ray Tube), which is one of the existing display devices, and it cannot cope with the current trend of weight reduction and thinning. Then, in response to this trend, liquid crystal displays (LCD: Liquid Crystal Display), plasma displays (PDP: Plasma Display Panel), electroluminescent displays (ELD: Electro Luminescence Display), etc. have been developed as flat panel displays, and are being ...

Claims

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Application Information

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IPC IPC(8): C09K19/10C09K19/38G02B5/00G02F1/13
CPCC09K19/2007C09K19/322C09K2019/2035C09K19/32G02B1/04C09K2019/122C09K2019/2078C09K2019/0448C09K19/12
Inventor 李成奎崔珍郁尹志昊
Owner DONGJIN SEMICHEM CO LTD