Composition for forming an alignment layer, and alignment layer and phase difference film manufactured using same

A technology of composition and alignment layer, applied in the direction of polarizing element, etc., can solve the problems of interlayer peeling, low bonding strength of retardation film, etc.

Inactive Publication Date: 2014-06-11
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, since the retardation film has low bonding strength between layers, this causes a possibility of delamination between layers in the method of first bonding the retardation film to the substrate with an adhesive and then removing the protective film therefrom. question

Method used

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  • Composition for forming an alignment layer, and alignment layer and phase difference film manufactured using same
  • Composition for forming an alignment layer, and alignment layer and phase difference film manufactured using same
  • Composition for forming an alignment layer, and alignment layer and phase difference film manufactured using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 7 and comparative example 1 and 2

[0276] Using the composition shown in the following Table 1, by mixing all the alignment agent, viscosity enhancer, photoinitiator (Irgacure907, manufactured by BASF Co.) and organic solvent (toluene) (unit is g), to prepare each Compositions for the preparation of alignment layers.

[0277] Table 1

[0278]

[0279] sample preparation

[0280] After saponifying each of the compositions prepared in Examples 1 to 7 and Comparative Examples 1 and 2, respectively, the treated compositions were applied to a TAC film (manufactured by Fuji Co.) into which hydroxyl groups had been introduced on the surface, and The coated film was dried at 100° C. for 1 minute, and the dried film was exposed to light to induce a curing reaction, thereby preparing an alignment layer. After coating a photocurable liquid crystal composition (RMS) containing a liquid crystal compound (having a carbon-carbon unsaturated bond at the terminal) to the resulting alignment layer, the coated film was dri...

Embodiment 8 to 14 and comparative example 3 and 4

[0282] With the composition shown in the following Table 2, by mixing all the liquid crystal compound (RMS), viscosity enhancing agent, alignment agent (Irgacure907, manufactured by BASF Co.) and organic solvent (toluene) (unit is g), to Each composition for preparing the liquid crystal layer was prepared.

[0283] Further, with the composition shown in Table 2, by mixing all the alignment agent, adhesion enhancer, photoinitiator (Irgacure907, manufactured by BASF Co.) and organic solvent (toluene) (unit is g), To prepare the composition for preparing the alignment layer.

[0284] Table 2

[0285]

[0286] sample preparation

[0287] After saponifying each of the compositions prepared in Examples 8 to 14 and Comparative Examples 3 and 4, respectively, the treated compositions were applied to a TAC film (manufactured by Fuji Co.) into which hydroxyl groups had been introduced on the surface, and The coated film was dried at 100° C. for 1 minute, and the dried film was e...

experiment example

[0289]

[0290] Of the patterns A and B of the prepared retardation film, the orientation angle of the pattern A was measured using an instrument WPA-100L obtained from Rukeo Co.

[0291] ◎: 45°±3 (for pattern A), 135°±3 (for pattern B)

[0292] ○: 45°±less than 6 ((for pattern A), 135°±less than 6 (for pattern B)

[0293] ×: 45°±6 or more (for pattern A), 135°±6 or more (for pattern B)

[0294]

[0295] Rr: phase retardation of the retardation film prepared in Comparative Example 1 (Table 3) or Comparative Example 3 (Table 4)

[0296] Rs: Phase retardation of the corresponding retardation film

[0297] ◎: 0.97

[0298] ○: 0.95

[0299] △: 0.90

[0300] ×: Rs / Rr is 1.1 or more, or Rs / Rr is 0.90 or less

[0301]

[0302] The formed pattern was observed through an optical microscope, and pattern picking was evaluated according to the following criteria of degrees of pattern picking.

[0303] ◎: Pa...

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Abstract

The present invention relates to a composition for forming an alignment layer and to an alignment layer manufactured using same. More particularly, the present invention relates to a composition for forming an alignment layer for aligning liquid crystal compounds. The composition includes an adhesion-reinforcing agent including an isocyanate group and a (meth)acrylate group at an end portion for forming a bond with a reactive group in the liquid crystal compound. While curing the composition for forming the alignment layer, a chemical bond may be formed with another layer formed at the side portion so as to manufacture a phase difference film having very strong interlayer adhesion.

Description

technical field [0001] The present invention relates to a composition for preparing an alignment layer, an alignment layer prepared therefrom, and a retardation film including the alignment layer having excellent interlayer bonding. Background technique [0002] Factors that perceive a stereoscopic effect can be classified into physiological factors and empirical factors. Generally, the three-dimensional image display technology adopts the principle of binocular parallax as the main factor of perceived solidity in the near range. [0003] Such a principle of binocular parallax is characterized in that after taking one image as if viewed from the left eye and another image as if viewed from the right eye at different angles by at least two stereoscopic image cameras, the captured images are transferred separately to the observer's eyes. The above-mentioned method is possible by receiving matter at different angles through the retina in two eyes of a person, and combining th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/02C08K5/29C08J5/18G02B5/30
CPCC08K5/29C08J5/18C08L101/02
Inventor 宋昺勋赵敏成崔凤珍
Owner DONGWOO FINE CHEM CO LTD
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