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Liquid crystal sealing compound and liquid crystal display unit using the liquid crystal sealing compound

A technology of liquid crystal display unit and liquid crystal sealant, which is applied in the directions of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc. Realization and other problems, to achieve the effect of low liquid crystal pollution and excellent general characteristics

Active Publication Date: 2021-12-24
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the liquid crystal dropping method has the following problems: since the liquid crystal sealing agent in an uncured state is in contact with the liquid crystal, the components of the liquid crystal sealing agent are dissolved (eluted) into the liquid crystal at this time and the resistance value of the liquid crystal is lowered, causing cracks near the sealing. poor display
However, a liquid crystal sealing agent for a liquid crystal dropping method having sufficient performance for adapting to the above-mentioned flexible substrate has not yet been realized.

Method used

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  • Liquid crystal sealing compound and liquid crystal display unit using the liquid crystal sealing compound

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Embodiment

[0118] Hereinafter, the present invention will be described in further detail through examples, but the present invention is not limited to the examples. In addition, unless otherwise stated, "part" and "%" herein are mass basis.

Synthetic example 1

[0119] [Synthesis Example 1: Synthesis of full acryloyl compound of bisphenol A epoxy resin]

[0120] 282.5g bisphenol A type epoxy resin (product name: YD-8125, Nippon Steel Chemical Co., Ltd. manufacture) is dissolved in 266.8g toluene, adds 0.8g therein as the dibutyl hydroxytoluene of polymerization inhibitor, and The temperature was raised to 60°C. Then, 117.5 g of 100% equivalent of epoxy group acrylic acid was added, the temperature was further raised to 80° C., 0.6 g of trimethylammonium chloride was added as a reaction catalyst, and stirred at 98° C. for about 30 hours to obtain a reaction liquid. This reaction liquid was washed with water, and toluene was distilled off to obtain 395 g of the target bisphenol A type epoxy acrylate.

Synthetic example 2

[0121] [Synthesis Example 2: Synthesis of Partial Acryloyl Compound of Bisphenol A-type Epoxy Resin]

[0122] 836 g of bisphenol A epoxy resin (RE-310S manufactured by Nippon Kayaku Co., Ltd.) was dissolved in 1000 g of toluene, 3 g of dibutylhydroxytoluene was added as a polymerization inhibitor, and the temperature was raised to 60°C. Then, 165 g of acrylic acid (manufactured by Nippon Shokubai Co., Ltd.) and 5 g of a 40% aqueous solution of tripropylammonium hydroxide as a reaction catalyst were added with 50% equivalents of epoxy groups, and stirred at 98° C. for about 10 hours to obtain The reaction solution. This reaction liquid was washed with water, and toluene was distilled off to obtain 995 g of the intended partially acryloylated bisphenol A epoxy resin.

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Abstract

The present invention relates to a liquid crystal sealing compound and a liquid crystal display unit using the liquid crystal sealing compound. The present invention proposes a liquid crystal sealing agent for liquid crystal dropping method that can be applied to flexible displays and curved displays, and has excellent general properties such as low liquid crystal contamination and adhesive strength, and a liquid crystal display unit with excellent reliability. A liquid crystal sealing agent for liquid crystal dropping method, wherein, the liquid crystal sealing compound for liquid crystal dropping method contains at least one (A) compound having a urethane bond in the molecule, and the liquid crystal sealing agent for liquid crystal dropping method The cured product of the sealant has a glass transition temperature measured by the DMA method of 90° C. or lower, and a tan δ of 0.5 or higher.

Description

technical field [0001] The present invention relates to a liquid crystal sealing compound used in a liquid crystal dropping method. More specifically, it relates to a liquid crystal dropping that can be applied to flexible displays and curved displays and has excellent general properties such as low liquid crystal contamination and adhesive strength. Use liquid crystal sealant. Background technique [0002] With the increase in size of liquid crystal display units in recent years, a so-called liquid crystal dropping method with higher mass productivity has been proposed as a method of manufacturing liquid crystal display units (see Patent Document 1 and Patent Document 2). Specifically, it is a method of manufacturing a liquid crystal display unit in which a liquid crystal is dripped inside a bank of a liquid crystal sealing agent formed on one substrate, and the other substrate is bonded together to seal the liquid crystal. [0003] However, the liquid crystal dropping met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/06C09J11/08G02F1/1339G02F1/1341
CPCG02F1/1339G02F1/1341C09J11/04C09J11/06C09J11/08C09J175/14C08L2205/035C08L2205/03C08L2203/206C08L2205/02C08L63/10C08L33/04C08L63/00C08K13/02C08K5/544C08K5/5435C09K3/1021
Inventor 武藤正嘉内藤正弘竹居祥行田上胜大
Owner NIPPON KAYAKU CO LTD
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