Composition for forming cured film, orientation material and retardation material

A curing film and composition technology, applied in the direction of instruments, polarizing elements, optics, etc., can solve the problems of low contrast ratio, difficulty in improving contrast ratio and brightness, response speed, etc., and achieve high-efficiency formation and excellent vertical orientation Effect

Active Publication Date: 2021-02-19
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The characteristic of IPS-LCD is that since there is no inclination in the vertical direction of the liquid crystal molecules, there is little brightness change / color change due to the viewing angle, but as disadvantages, it is difficult to improve the contrast ratio, brightness, and response speed.
For example, as disclosed in Patent Document 1, for the IPS-LCD at the initial stage of the proposal, the compensation film for the viewing angle is not used. For such an IPS-LCD without the compensation film for the viewing angle, the light leakage is relatively large in the dark state due to the inclination angle. , thus has the disadvantage of showing low contrast ratio values ​​of

Method used

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  • Composition for forming cured film, orientation material and retardation material
  • Composition for forming cured film, orientation material and retardation material
  • Composition for forming cured film, orientation material and retardation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～18、 comparative example 1～4

[0394] On the substrates shown in Table 2 or Table 3, each cured film-forming composition of Examples 1-18 and Comparative Examples 1-4 was coated with a wet film thickness of 4 μm using a bar coater. Then, heat drying was performed in a heat circulation oven at a temperature of 110° C. for 60 seconds to form a cured film on each base material.

[0395] On this cured film, a polymerizable liquid crystal solution RMS03-015 for vertical alignment manufactured by Merck Co., Ltd. was applied with a wet film thickness of 6 μm using a bar coater. The coating film on the substrate is 600mJ / cm 2 Exposure is performed to produce a phase difference material.

[0396] The incident angle dependence of the in-plane phase difference was measured using Otsuka Electronics Co., Ltd. phase difference measurement device RETS100 about these produced phase difference materials. The case where the in-plane retardation value was 0 at an incident angle of 0° and the in-plane retardation at an incid...

Embodiment 1～15、 comparative example 1～2

[0399] On the substrates shown in Table 2, each cured film-forming composition of Examples and Comparative Examples was coated with a wet film thickness of 4 μm using a bar coater. Then, heat drying was performed in a heat circulation oven at a temperature of 110° C. for 60 seconds to form cured films on the substrates.

[0400] On this cured film, a polymerizable liquid crystal solution RMS03-015 for vertical alignment manufactured by Merck Co., Ltd. was applied with a wet film thickness of 6 μm using a bar coater. The coating film on the substrate is 600mJ / cm 2 Exposure is performed to produce a phase difference material.

[0401] Incisions were formed with a cutter blade on this phase difference material at intervals of 1 mm vertically and horizontally so as to form 5×5 blocks. On this incision, a cellophane tape peel test was performed using a Scotch tape. In evaluation, the case where all 25 pieces remained without peeling off was made into (circle), and the case where...

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Abstract

The present invention provides a composition for forming a cured film, which is used to provide an excellent vertical alignment, and possess transparency, solvent resistance, and adhesion to a substrate and a polymerizable liquid crystal layer required for an optical compensation film, An alignment material that can stably align polymerizable liquid crystals vertically even on a resin film under low-temperature, short-time firing conditions. As a method for solving the problem of the present invention, it relates to a cured film forming composition characterized by containing (A) a compound having a carboxyl group and a vertical alignment group having one or more epoxy groups on the side chain or end of the carboxyl group. Either or both of a polymer obtained by reacting epoxy groups of a polymer, (B) a crosslinking agent, and (C) an adhesion promoter, and (D) a polymer having a thermally crosslinkable group Orientation material, characterized in that it is obtained by using the composition; phase difference material, characterized in that it is obtained by using the composition.

Description

technical field [0001] The present invention relates to a cured film-forming composition suitable for a vertical alignment material that vertically aligns liquid crystal molecules. In particular, the present invention relates to an IPS liquid crystal display device (In-plane Switching LCD) for improving liquid crystal display devices (liquid crystal display; LCD), specifically filled with liquid crystals having positive dielectric anisotropy (Δε>0). ; The composition for forming a cured film, an orientation material, and a phase difference material useful for a +C plate (positive C plate) used for viewing angle characteristics of an in-plane orientation conversion LCD). Background technique [0002] IPS-LCD is characterized in that since there is no inclination in the vertical direction of the liquid crystal molecules, there is little brightness change / color change due to the viewing angle, but the disadvantages include that it is difficult to improve the contrast ratio, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337C08G59/16C08G59/40C08L63/00G02B5/30
CPCC08G59/40C08L63/00G02F1/1337G02B5/30C08G59/62
Inventor 伊藤润菅野裕太畑中真
Owner NISSAN CHEM IND LTD
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