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Alignment layer composition, alignment layer prepared with the same, preparation method of alignment layer, optical film containing the same, and display device including the optical film

A technology of composition and compound, applied in the field of alignment film composition, alignment film prepared with alignment film composition, preparation of alignment film, optical film including alignment film and display device including optical film, capable of solving liquid crystal alignment Instability, limited adhesion between liquid crystals and substrates, etc., to achieve the effects of avoiding delamination, excellent vertical alignment, and excellent adhesion

Active Publication Date: 2012-05-16
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the adhesion between the liquid crystal and the substrate has great limitations, and the alignment of the liquid crystal is fundamentally unstable, resulting in various defects.

Method used

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  • Alignment layer composition, alignment layer prepared with the same, preparation method of alignment layer, optical film containing the same, and display device including the optical film
  • Alignment layer composition, alignment layer prepared with the same, preparation method of alignment layer, optical film containing the same, and display device including the optical film
  • Alignment layer composition, alignment layer prepared with the same, preparation method of alignment layer, optical film containing the same, and display device including the optical film

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0124] The components used in the conductive alignment film composition of the vertical alignment optical film were mixed in the composition ratio shown in Table 1.

[0125] [Table 1]

[0126] components

Composition ratio (wt%)

pentaerythritol acrylate (1)

57.6

Urethane Acrylate Oligomer (2)

38.4

BHT (3)

0.1

Irgacure 184 TM(4)

3.9

[0127] (1) Pentaerythritol acrylate: SR444DTM, available from Sartomer Co. Inc.,

[0128] (2) Urethane acrylate oligomer: SC2100 TM , purchased from Miwon Commercial Co., Ltd.,

[0129] (3) BHT (Butylated hydroxytoluene, Butylated hydroxytoluene): antioxidant, purchased from Sigma-Aldrich

[0130] (4)Irgacure184 TM : photoinitiator, purchased from Ciba-Geigy

[0131] Based on the total solution of 100wt%, the mixture was diluted to 10wt with a mixed solvent of 40wt% ethanol (Ethanol), 30wt% 1-propanol (1-Propanol) and 30wt% methyl ethyl ketone (MethylEthylKetone) ...

preparation example 2

[0133] Prepare an alignment composition (solution) in the same manner as Preparation Example 1 of the alignment film composition, except that the 3-(dimethylamino)propyl group represented by the formula 6-2 is added in an amount of 1 wt % Used as an amino-based coupling agent.

preparation example 3

[0135] An alignment composition (solution) was prepared in the same manner as Preparation Example 1 of the alignment film composition, except that the diethylamine represented by the formula 6-3 was used as an amino group-based coupling agent.

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Abstract

The present invention relates to a liquid crystal alignment layer composition showing excellent adhesive strength to a substrate and a liquid crystal layer and excellent homeotropic alignment of liquid crystals, a liquid crystal alignment layer prepared with the same, a preparation method of the liquid crystal alignment layer, an optical film including the liquid crystal alignment layer, and a display device including the same. According to the present invention, provided are a liquid crystal alignment layer composition which comprises 1-50 wt% of a photocurable resin binder, 0.01-5 wt% of an amine compound selected from the group consisting of primary and secondary amino-based coupling agents, 0.1-5 wt% of a photoinitiator, and the remainder solvent; a method for preparing a liquid crystal alignment layer by coating the substrate with the liquid crystal alignment layer composition, removing the solvent, and curing the liquid crystal alignment layer composition; an alignment layer which is prepared with the liquid crystal alignment layer composition of the present invention; an optical film which comprises the substrate, the alignment layer, and a liquid crystal layer formed on the alignment layer; and a display device including the optical film.; The liquid crystal alignment layer formed with the liquid crystal alignment layer composition of the present invention has excellent adhesive strength to the substrate and to an upper liquid crystal layer, and provides excellent homeotropic alignment to liquid crystals. The optical film of the present invention can be applied to a polarizer by itself and can be very helpfully used as a retardation film or a view angle compensation film in various types of LCD modes such as IPS mode and the like.

Description

technical field [0001] This application claims priority from Korean Patent Application 2009-30940 filed April 9, 2009 and Korean Patent Application 2010-30369 filed April 2, 2010 at the Korean Intellectual Property Office, the disclosures of which are incorporated by reference this manual. [0002] The present invention relates to an alignment film composition, an alignment film prepared from the composition, a method for preparing the alignment film, an optical film comprising the alignment film, and an optical film comprising the alignment film The display device of the present invention, more specifically, relates to an alignment film composition for vertically aligning liquid crystals, which exhibits excellent adhesive strength to a substrate and vertical alignment to liquid crystals, an alignment film prepared with the composition Film, a method for preparing the alignment film, an optical film including the alignment film, and a display device including the optical film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/06C08K5/17C09K19/56G02B5/02G02F1/1337
CPCG02B5/3016C08G18/672C09D167/07C08K5/544C08F222/1006C08F290/067C08K5/17G02B5/3083G02F1/133636C08K5/0025C08L75/14G02F1/133788C09K2323/02C08F222/103C08K5/0008
Inventor 李大熙朴文洙
Owner LG CHEM LTD
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