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Photoreaction monomer and liquid crystal composition and liquid crystal panel thereof

A liquid crystal composition, photoreactive technology, applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of high monomer residue and image retention, achieve fast curing speed, and solve the effect of image retention.

Inactive Publication Date: 2013-03-13
SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to provide a photoreactive monomer with faster curing speed, so as to solve the phenomenon of image sticking caused by the high residual amount of the monomer

Method used

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  • Photoreaction monomer and liquid crystal composition and liquid crystal panel thereof
  • Photoreaction monomer and liquid crystal composition and liquid crystal panel thereof
  • Photoreaction monomer and liquid crystal composition and liquid crystal panel thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] In this embodiment, a photoreactive monomer is provided, which is included in the liquid crystal composition. The absorption wavelength of the ultraviolet absorption spectrum of the photoreactive monomer is between 300 and 450 nm, represented by the following molecular formula I:

[0076]

[0077] Wherein: the A group is a hard core, including at least one benzene ring; the P group is the polymerizable group, selected from acrylate groups.

[0078] According to a preferred embodiment of the present invention, the present invention also provides a liquid crystal composition for making a liquid crystal panel, said liquid crystal composition comprising: at least one photoreactive monomer represented by formula I, at least one liquid crystal molecules; and, at least one diluent.

[0079] The liquid crystal molecules are vertically aligned liquid crystal molecules (VA-LC), and the diluent is a liquid crystal compound containing one or more alkenyl groups.

[0080] The li...

Embodiment 2

[0082] In this embodiment, a photoreactive monomer is provided, which is included in the liquid crystal composition and represented by the following molecular formula i:

[0083]

[0084] in,

[0085] R 1 and R 2 The groups are independently selected from -H or -CH 3 one of

[0086] x 1 、X 2 and x 3 are independently selected from -H or -F.

[0087] Further, when the R 1 , R 2 、X 1 、X 2 and x 3 When the groups are all -H, the synthesis route of the photoreactive monomer of this embodiment is as follows:

[0088] ;

[0089] The preparation method is as follows:

[0090] Mix 4 millimoles (mmol) of 4,4'-dihydroxybiphenyl (compound 1), 1 mmol of 4-hydroxybenzoic acid, 0.1 mmol of 4-dimethylaminopyridine (DMAP) and 50 ml of tetrahydrofuran (THF) after dehydration Put it into a 250 mL double-neck bottle, pump it with a vacuum deoxygenation and water removal device, and fill it with nitrogen three times, then connect nitrogen to the dropping tube to make the react...

Embodiment 3

[0093] In this embodiment, a photoreactive monomer is provided, which is included in the liquid crystal composition and represented by the following molecular formula ii:

[0094]

[0095] in,

[0096] R 1 and R 2 The groups are independently selected from -H or -CH 3 one of

[0097] x 1 、X 2 and x 3 are independently selected from -H or -F.

[0098] Further, when the R 1 , R 2 、X 1 、X 2 and x 3 When the groups are all -H, the synthesis route of the photoreactive monomer of this embodiment is as follows:

[0099] ;

[0100] The preparation method is as follows:

[0101] Put 0.045 mol of p-iodophenol (compound 1), 0.064 mol of tert-butyldimethylsilyl chloride and 0.204 mol of imidazole into a 250 ml double-necked bottle, inject 60 ml of THF after dehydration, and stir for six hours. After suction and filtration, most of the solvent was removed by a rotary concentrator, and then extracted with EA and saturated brine. The collected filtrate was dehydrated with...

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Abstract

The invention discloses a photoreaction monomer and a liquid crystal composition and a vertical alignment liquid crystal panel with the same. According to the photoreaction monomer provided by the invention, by increasing the length of a hard core, the absorption wavelength range of the ultraviolet absorption spectrum of the monomer is superposed with the wavelength range of an ultraviolet lamp to a great extent, thus the curing speed of the photoreaction monomer disclosed by the invention is higher than that of the existing RM, and the phenomenon of image sticking caused by high amount of residues of the monomer is avoided.

Description

technical field [0001] The invention relates to a photoreactive monomer, in particular to a photoreactive monomer added with a trifluoromethyl group, a liquid crystal composition having the photoreactive monomer, and a vertical alignment liquid crystal panel. Background technique [0002] Liquid Crystal Display (LCD) is a flat-panel display device that uses the characteristics of liquid crystal materials to display images. Compared with other display devices, it has the advantages of thinness, low driving voltage and low power consumption. Mainstream products in the consumer market. [0003] The LCD panel is an important component of LCD monitors. After being used for a long time, the liquid crystal panel will be ionized due to the deterioration of the materials inside the panel, which will affect the display quality of the liquid crystal panel. The most common problem is image sticking on the surface. This problem of residual influence is related to the excessively high c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/90C07C69/54C07C67/14C09K19/56G02F1/1337
CPCC07C69/54C07C69/86C09K2019/0448C09K2019/123C09K2019/181C09K2019/2042C09K2019/3004
Inventor 谢忠憬
Owner SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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