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Composition for forming dye polarizer and dye polarizer

A technology of polarizer and composition, which is applied in the field of compositions for forming dye-type polarizers and dye-type polarizers, and achieves the effects of good heat resistance, high orientation, and prevention of randomization

Active Publication Date: 2016-08-31
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this experiment has not been successful, and therefore, a dye-type polarizing plate that exhibits excellent heat resistance to maintain excellent orientation of a dye layer and a high degree of polarization when exposed to high-temperature heat has been continuously demanded

Method used

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  • Composition for forming dye polarizer and dye polarizer
  • Composition for forming dye polarizer and dye polarizer
  • Composition for forming dye polarizer and dye polarizer

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0173] : Synthesis of Curable Anisotropic Dye (Chemical Formula 1a)

[0174] Formaldehyde (1.2eq) and sodium bisulfate (1eg) were added to water and stirred for 1 hour. Aniline (1 eq) was added to the solution and stirred at 60°C for 16 hours. After the reaction, the solution was cooled to a temperature below 0°C, thereby precipitating unpurified product dissolved in the solvent, then filtered, washed with ethyl acetate, and dried in a vacuum oven. Thus, Intermediate 1 was prepared.

[0175] A DMF solution of 4-hydroxyethylaniline (1 eq) was mixed with sodium nitrite (1.1 eq) dissolved in distilled water, and 1N HCl was slowly added thereto at 0°C, followed by stirring for about 1 hour. The stirred solution was added dropwise to a solution of Intermediate 1 (1 eq) and sodium acetate (3.5 eq) dissolved in 40 ml distilled water. At this time, the temperature was maintained at 0°C, and after the dropwise addition, stirring was performed for about 4 hours. After stirring, the ...

preparation Embodiment 2

[0180] : Synthesis of Curable Anisotropic Dye (Chemical Formula 1b)

[0181] Formaldehyde (1.2eq) and sodium bisulfate (1eg) were added to water and stirred for 1 hour. Aniline (1 eq) was added to the solution and stirred at 60°C for 16 hours. After the reaction, the solution was cooled to a temperature below 0°C, thereby precipitating unpurified product dissolved in the solvent, then filtered, washed with ethyl acetate, and dried in a vacuum oven. Thus, Intermediate 1 was prepared.

[0182] A DMF solution of 4-hydroxyethyl-3-fluoro-aniline (1 eq) was mixed with sodium nitrite (1.1 eq) dissolved in distilled water, and 1 N HCl was slowly added thereto at 0 °C, followed by stirring for about 1 Hour. The stirred solution was added dropwise to a solution of Intermediate 1 (1 eq) and sodium acetate (3.5 eq) dissolved in 40 ml distilled water. At this time, the temperature was maintained at 0°C, and after the dropwise addition, stirring was performed for about 4 hours. After s...

preparation Embodiment 3

[0187] : Synthesis of Curable Anisotropic Dye (Chemical Formula 1c)

[0188] Formaldehyde (1.2eq) and sodium bisulfate (1eg) were added to water and stirred for 1 hour. Aniline (1 eq) was added to the solution and stirred at 60°C for 16 hours. After the reaction, the solution was cooled to a temperature below 0°C, thereby precipitating unpurified product dissolved in the solvent, then filtered, washed with ethyl acetate, and dried in a vacuum oven. Thus, Intermediate 1 was prepared.

[0189] A DMF solution of 4-hydroxyethylaniline (1 eq) was mixed with sodium nitrite (1.1 eq) dissolved in distilled water, and 1N HCl was slowly added thereto at 0°C, followed by stirring for about 1 hour. The stirred solution was added dropwise to a solution of Intermediate 1 (1 eq) and sodium acetate (3.5 eq) dissolved in 40 ml distilled water. At this time, the temperature was maintained at 0°C, and after the dropwise addition, stirring was performed for about 4 hours. After stirring, the ...

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Abstract

The present invention relates to a composition for forming a dye polarizer and the dye polarizer, wherein the composition allows a dye polarizer simultaneously exhibiting excellent polarizability, heat-resistance, and dichroic ratio to be provided. The composition for forming dye polarizer includes: a solid-type anisotropic dye having a particular chemical structure; and an orientation aid having a certain chemical structure.

Description

technical field [0001] The present invention relates to a composition for forming a dye-type polarizing plate, which can be used to provide a dye-type polarizer simultaneously exhibiting excellent polarization degree, heat resistance, and dichroic ratio, and a dye-type polarizing plate piece. Background technique [0002] A film-type polarizer (also referred to as a sheet polarizer) is generally an optical member capable of polarizing light in a specific direction, and is widely used in display devices such as liquid crystal displays and the like. For example, the film-type polarizing plate is widely used in liquid crystal displays to selectively transmit only light of a specific direction among light emitted from a backlight and light passing through a liquid crystal layer, and to control polarization. [0003] As the film-type polarizing plate, a polarizing plate using a stretched polyvinyl alcohol (PVA) film dyed with a dichroic dye has been used very frequently in liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B35/021G02B5/30
CPCC09B35/021G02B5/26G02B5/3033C09B69/106C09B29/12C09B31/043C09B31/062C09B31/18G02B1/08
Inventor 柳东雨全成浩徐庆昌张炯玭
Owner LG CHEM LTD
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