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Liquid crystal sealing compound and liquid crystal display unit using same

A liquid crystal sealant and thermal curing agent technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of low liquid crystal pollution, poor display, poor storage stability and operation stability of liquid crystal sealant, and achieve Fast response, guaranteed degree of freedom, easy to create effects

Inactive Publication Date: 2016-09-07
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in general, thermal radical generators gradually generate radicals at room temperature, so there are problems such as poor storage stability and operational stability of liquid crystal sealants.
In addition, curing accelerators such as polyvalent carboxylic acids act as catalysts, react by themselves, are not captured by chemical bonding in cured products, dissolve in liquid crystals, and cause poor display
[0008] As described above, although people have actively developed liquid crystal sealing agents, liquid crystal sealing agents that have excellent thermal reactivity, good storage stability, and low liquid crystal contamination have not yet been realized.

Method used

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

Examples

Experimental program
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Embodiment

[0067] Hereinafter, the present invention will be described in more detail through synthesis examples and examples, but the present invention is not limited by the examples. In addition, unless otherwise specified, "parts" and "%" herein are mass standards.

Synthetic example 1

[0068] [Synthesis Example 1: Synthesis of Epoxy Acrylate of Bisphenol A Epoxy Resin]

[0069] Dissolve 282.5g of bisphenol A epoxy resin (product name: YD-8125, manufactured by Nippon Steel Chemical Co., Ltd.) in 266.8g of toluene, and add 0.8g of dibutyl hydroxytoluene as a polymerization inhibitor, and heat up to 60°C. Thereafter, 117.5 g of epoxy group 100% equivalent acrylic acid was added, and the temperature was raised to 80° C., 0.6 g of reaction catalyst trimethylammonium chloride was added there, and stirred at 98° C. for 30 hours to obtain a reaction liquid. The reaction solution was washed with water, and toluene was distilled off to obtain 395 g of the target bisphenol A epoxy acrylate (acrylated bisphenol A epoxy resin) (KAYARAD RTM R-93100)

Synthetic example 2

[0070] [Synthesis Example 2: Synthesis of anhydride adduct of bisphenol A epoxy acrylate]

[0071] Add 4.84g of bisphenol A type epoxy acrylate obtained in Synthesis Example 1, 0.049g of 4-dimethylaminopyridine, 6.07g of triethylamine, and 1000ml of dichloromethane. After stirring and dissolving at room temperature, add tetrahydro-ortho 18.3 g of phthalic anhydride was stirred at room temperature for 3 hours. After washing the obtained reaction solution with water six times, dichloromethane was distilled off to obtain 7 g of bisphenol A type epoxy acrylate having a carboxyl group in the molecule. LC MS (m / z) = 787 (m-H), IR1709cm -1 (COOH).

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Abstract

The purpose of the present invention is to provide a liquid crystal sealing material for use in a liquid crystal drop fill method. The sealing material can achieve a rapid thermal reaction, rarely contaminates a liquid crystal throughout the process, and exhibits excellent storage stability and excellent cured product properties such as moisture proof reliability. The liquid crystal sealing material is characterized by comprising (a) one or more curable resins selected from among epoxy resins, (meth)acrylated epoxy resins, and partially (meth)acrylated epoxy resins, each resin bearing active hydrogen in the molecule (with the proviso that the active hydrogen is exclusive of hydrogen contained in a hydroxyl group), and (b) a heat-curing agent.

Description

technical field [0001] The present invention relates to a liquid crystal sealing compound having favorable thermosetting properties. More specifically, it relates to a liquid crystal sealing agent which has good thermal curability, good storage stability, and excellent moisture resistance of a cured product, and a liquid crystal display unit sealed with the cured product. Background technique [0002] With the increase in size of liquid crystal display units in recent years, a so-called liquid crystal dropping method having high mass productivity has been proposed as one method of manufacturing liquid crystal display units (Patent Documents 1 and 2). Specifically, in a method of manufacturing such a liquid crystal display unit, liquid crystal is dropped inside a liquid crystal sealant bank formed on one substrate, and then the liquid crystal is sealed by laminating the other substrate. [0003] However, in the liquid crystal dropping method, since the uncured liquid crystal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1339
CPCG02F1/1339C08G59/4035C08L63/10
Inventor 太田英之西原荣一今冈大辅吉田早纪菅原坚太
Owner NIPPON KAYAKU CO LTD
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