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Liquid crystal sealing agent, and liquid crystal display cell using same

A liquid crystal sealant and organic solvent technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of poor contact, increased stress and thickening of liquid crystal sealant, and achieve excellent bonding strength and good contact , good moisture resistance effect

Inactive Publication Date: 2014-05-28
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, poor contact performance means that the thickening due to preheating is too large, the liquid crystal sealing agent is not crushed sufficiently, and the contact area with the counter substrate becomes small.
[0005] Moreover, what the latest liquid crystal display unit adopts is after forming a plurality of electrodes on a large glass substrate, after bonding and assembling the upper and lower substrates, and cutting into multiple processing steps of liquid crystal display units one by one, but due to the number of processing pieces It will also increase, and the size of the mother glass (substrate before cutting) will also increase, so the stress applied to the cured liquid crystal sealant will also increase

Method used

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  • Liquid crystal sealing agent, and liquid crystal display cell using same
  • Liquid crystal sealing agent, and liquid crystal display cell using same
  • Liquid crystal sealing agent, and liquid crystal display cell using same

Examples

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Embodiment

[0099] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to the examples. In addition, unless otherwise specified, "parts" and "%" in this article are based on mass.

[0100] [Preparation of Liquid Crystal Sealant]

[0101] Each resin component (component (a), component (c)) and an organic solvent (component (d)) were mixed in the ratio shown in Table 1 below, and heated and dissolved. After cooling to room temperature, appropriately add coupling agent (component (f), inorganic filler (component (g)), etc., acrylic polymer with core-shell structure (component (b)) as necessary, and add curing accelerator as necessary (Component (e)) uniformly mixed with a three-roll mill, and filtered using a metal mesh, and obtained the liquid crystal sealing compound of Examples 1-8 and Comparative Examples 1-4.

[0102] [gel time]

[0103] Using an automatic gelation tester (manufactured by Iyo Electronics Co., ...

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Abstract

Provided is a thermosetting liquid crystal sealing agent which offers excellent coating workability, contact performance against an opposing substrate, and even viscosity stability after preliminary heating, and also offers extremely excellent adhesive strength and flexibility after curing. This liquid crystal sealing agent contains a solid phenol novolac resin (a) having a softening point of 75 DEG C or less, an acrylic polymer (b) having a core / shell structure, an epoxy resin (c), and an organic solvent (d), the gel time at 150 DEG C being 50-200 seconds.

Description

technical field [0001] The present invention relates to a liquid crystal sealing compound and a liquid crystal display unit using the same. Background technique [0002] From small displays such as mobile phones and LCD monitors to large TVs, liquid crystal display units are currently used in a wide range of fields, and further growth is expected in the future. There are mainly two methods of manufacturing such a liquid crystal display unit, a liquid crystal injection method and a liquid crystal dropping method. The liquid crystal dropping method is a method of manufacturing a liquid crystal display unit by coating a liquid crystal sealant on a transparent glass substrate or a plastic substrate properly equipped with a transparent electrode and / or alignment film, and dropping liquid crystal on the inner side of its dam. Demand is expanding from the viewpoints of shortening tact time (the time taken for each process) and ease of upsizing. However, there is a problem in that...

Claims

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Application Information

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IPC IPC(8): G02F1/1339C08G59/62
CPCG02F1/1339G02F2202/28C08G59/62
Inventor 坂野常俊林原昌一三轮广明
Owner NIPPON KAYAKU CO LTD
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