Sealant for liquid crystal and liquid-crystal display cell made with the same

A sealant, liquid crystal technology, applied in chemical instruments and methods, optics, instruments, etc., can solve the problems of poor liquid crystal orientation, reduce the reliability of display panels, and display irregularities, and achieve the effect of good reliability.

Active Publication Date: 2009-02-11
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such partially acrylated bisphenol-based epoxy resin substances have a problem in that they are likely to be eluted when they come into contact with liquid crystals, or when they come into contact with liquid crystals and are heated, resulting in poor alignment of liquid crystals, The display is irregular, which reduces the reliability of the display board

Method used

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  • Sealant for liquid crystal and liquid-crystal display cell made with the same
  • Sealant for liquid crystal and liquid-crystal display cell made with the same
  • Sealant for liquid crystal and liquid-crystal display cell made with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The epoxy acrylate A of 80 weight parts synthesis embodiment 1, the epoxy resin EBPS-300 of 20 weight parts (epoxy equivalent: 233g / eq, bisphenol S type epoxy resin, Nippon Kayaku Co., Ltd.'s product), 1.8 parts by weight of radical photopolymerization initiator 3,6-bis(2-methyl-2-morpholinopropionyl)-9-n-octylcarbazole (AdekaOptomerN-1414; product of Asahi Denka Kogyo) , 1.2 parts by weight of aminosilane coupling agent (KBM-603, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, the product of Shin-etsu Silicone) was heated and dissolved at 90°C to obtain a resin solution . The mixture was cooled to room temperature, then added 5 parts by weight of isophthalic dihydrazide (trade name IDH-S; the jet milled pulverized grade material provided by Otsuka Chemistry Inc., and further finely pulverized with a jet mill; melting point 224 ° C, active Hydrogen equivalent 48.5 g / eq; average particle diameter 1.7 micrometers; maximum particle diameter 7 micrometers), 30 parts by wei...

Embodiment 2

[0091] 80 parts by weight of epoxy acrylate A, 20 parts by weight of epoxy resin EBPS-300 (epoxy equivalent: 233g / eq, bisphenol S type epoxy resin, Nippon Kayaku Co., Ltd. product), 1.8 parts by weight of radical photopolymerization initiator 3,6-bis(2-methyl-2-morpholinopropionyl)-9-n-octylcarbazole (AdekaOptomerN-1414; product of Asahi Denka Kogyo) 1.2 parts by weight of an aminosilane coupling agent (KBM-603, N-β(aminoethyl)γ-aminopropyltrimethoxysilane, a product of Shin-etsu Silicone) was heated and dissolved at 90°C to prepare a resin solution. The mixture was cooled to room temperature, and then 6.5 parts by weight of Amicure-VDH (1,3-bis(hydrazinocarboethyl)-5-isopropylhydantoin, a product finely pulverized by a jet mill from Ajinomoto Fine Techno was added ), 30 parts by weight of alumina (SPC Aluminum, a product of C.I.Kasei, Inc., with an average particle diameter of 1.0 μm), and 7 parts by weight of core-shell rubber particles: Paraloid EXL-2655 (a product of Kureh...

experiment Embodiment 2

[0097] Next, liquid crystal contamination test (UV-irradiation and thermal curing), adhesive strength test and glass transition temperature test were carried out on the liquid crystal sealants prepared in Examples 1 and 2 and Comparative Examples 1 and 2.

[0098] Liquid crystal contamination test (UV-irradiation and thermal curing)

[0099] Next, the resistivity of the contact liquid crystal is tested as an index of the liquid crystal contamination property.

[0100] 0.1 g of a sealant for liquid crystal was put in a sample tube, and 1 mL of liquid crystal (MLC-6866-100; product of Merck) was added thereto. After irradiating the mixture with 2000 mJ / cm2 of ultraviolet light with a UV radiation instrument, the sample tube was placed in an oven and kept at 120° C. for 1 hour; after that, it was allowed to stand at room temperature for 0.5 hour. After these processes, only the liquid crystals were taken out from the treated sample tubes, and the components eluted into the liqui...

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Abstract

A sealant for liquid crystals which is extremely less apt to contaminate liquid crystals and has high adhesion strength. It is characterized by comprising as essential ingredients (a) a radiation-curable resin represented by the general formula (1), (b) a photopolymerization initiator, and (c) an inorganic filler having an average particle diameter of 3 [mu]m or smaller. [Chemical Formula 1] (In the formula, R<1> represents hydrogen or methyl; R<2> represents hydrogen, halogeno, hydroxy, C1-10 monovalent alkyl which is linear, branched, or cyclic, or C1-10 alkoxy; m is an integer of 1 to 4 and the m's may be the same or different; R<3> represents hydrogen or methyl; and n, which indicates the number of repeating units, is a positive number in the range of 0 to 20.

Description

technical field [0001] The invention relates to a sealant for liquid crystals and a liquid crystal display unit (display cell) made using the sealant. More specifically, the present invention relates to a sealant for liquid crystals, which can be used to manufacture liquid crystal display units, by dropping liquid crystals inside a photo-thermal curing type sealant for liquid crystals, the sealant being in It is formed on a substrate, and then bonded to another substrate to cure the liquid crystal sealant to seal the liquid crystal. The present invention also relates to a liquid crystal display unit manufactured using the sealant. Background technique [0002] In recent years, as the size of liquid crystal display units has increased, a higher productivity so-called liquid crystal dropping technique has been proposed as a process for manufacturing liquid crystal display units (see Japanese Patent Application Laid-Open Nos. 63-179323 and 10-239694) . Specifically, it is a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1339C09K3/10C08F299/02
Inventor 落直之浅野豊文今泉雅裕工藤勝西原栄一小柳敬夫市村纯夫平野雅浩
Owner NIPPON KAYAKU CO LTD
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