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Sealant for display and liquid crystal display using the same

A display and encapsulant technology, applied in the direction of instruments, adhesives, adhesive types, etc., can solve the problems of poor display, poor adhesion of liquid crystal sealants and alignment films, and reduced moisture resistance reliability, and achieve long-term reliability. Excellent resistance to heat and humidity, excellent reliability, and the effect of ensuring the degree of freedom

Inactive Publication Date: 2019-07-09
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in these methods, although the thermal reactivity is improved, there is a problem that the used thermal radical generator and curing accelerator themselves are eluted into the liquid crystal, causing display defects.
In addition, when a carboxylic acid is used as a curing accelerator, there is a problem that the carboxylic acid that is not incorporated into the curing system remains as it is, and the moisture resistance reliability is lowered.
[0007] In addition, due to the narrowing of the frame of the liquid crystal panel in recent years, the liquid crystal sealant is often drawn on the alignment film, and the liquid crystal sealant and the alignment film are poor in adhesiveness, so there is a problem that the liquid crystal panel peels off.
The rubbed alignment film that has been used in the past has the following problems: foreign matter is generated due to the rubbing that occurs during the rubbing process, or the alignment of liquid crystals becomes uneven. The change of the alignment film of the formula, but the adhesiveness of the alignment film of the photo-alignment treatment type and the liquid crystal sealant is generally weak, and the problem of peeling off the liquid crystal panel becomes significant.
For example, Patent Document 6 proposes a sealant that does not use an inorganic filler, but does not mention an alignment film of a photo-alignment treatment type.
Patent Document 7 proposes a sealing material containing an aliphatic epoxy compound having three or more epoxy groups in one molecule, but does not mention an alignment film of a photo-alignment treatment type.

Method used

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  • Sealant for display and liquid crystal display using the same
  • Sealant for display and liquid crystal display using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1

[0102] Heat and dissolve components (B) and (G) at 90°C in the proportions shown in Table 1 below, then cool to room temperature, and add components (A), (C), (D), (E), (F ), (H), were stirred, then dispersed by a three-roll machine, and filtered with a metal mesh (635 mesh), thereby preparing Examples 1-9 of the encapsulant for a display. Moreover, the comparative example 1 was prepared using component (O-4) instead of component (A).

[0103] [Evaluation]

[0104] [Adhesive Strength]

[0105] (Initial Adhesive Strength Blank Glass (Sugaras))

[0106] 1 g of glass fibers of 5 μm was added as a spacer to 100 g of liquid crystal sealing compound produced in an example and a comparative example, and mixed and stirred. Apply this liquid crystal sealant on a glass substrate in such a way that the corners of 1 cm x 1 cm are replicated, bond the facing glass substrates, and irradiate 3000 mJ / cm with a UV irradiation machine 2 UV rays, then put into an oven and thermally cured at ...

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Abstract

The invention relates to an encapsulant for displays. The purpose of the present invention is to provide a display sealing agent which has a fast reaction due to heat, has extremely low contaminationto a liquid crystal in a step, has excellent adhesiveness to an organic film such as an alignment film, and has little deterioration in performance due to a moisture-resistant reliability test. The display sealing agent contains (A) a compound having a carboxyl group bonded to an aromatic ring in the molecule thereof, and (B) a curable compound.

Description

technical field [0001] The present invention relates to an encapsulant for displays, which reacts quickly due to heat, has extremely low contamination of liquid crystals in the process, and has excellent adhesion to organic films such as alignment films. performance degradation is less. Background technique [0002] As for the sealing compound for displays, the sealing compound for liquid crystal displays, the sealing compound for organic electroluminescence displays, the adhesive agent for touch panels etc. are mentioned, for example. These materials are required to have excellent curability, high adhesiveness irrespective of the adherend, and excellent moisture and heat resistance reliability in common. [0003] For example, liquid crystal sealing compound is taken as an example, and it demonstrates below. [0004] In recent years, with the miniaturization of liquid crystal display elements, due to the metal wiring part of the array substrate of the liquid crystal displa...

Claims

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Application Information

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IPC IPC(8): C09J163/10C09J163/00C09J11/08C09J11/04C08G59/42C08G59/52C08G59/62C08G59/66G02F1/1339
CPCC08G59/4223C08G59/52C08G59/628C08G59/66C08L2203/206C08L2205/025C08L2205/035C09J11/04C09J11/08C09J163/10G02F1/1339C08L63/10C08L33/04C08K7/18C08L63/00C08F2/50C08F20/18C08F20/32C08J3/126C08K5/3445C08K5/54C08K3/013
Inventor 馆野将辉菅原坚太宫川直房落直之
Owner NIPPON KAYAKU CO LTD
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