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Sealing material for liquid-crystal dropping process, vertical-conduction material, and liquid-crystal display element

A liquid crystal dropping and sealant technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of poor pot life, poor liquid crystal pollution, poor pot life, etc.

Active Publication Date: 2009-04-22
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydantoin-skeleton hydrazides actually belong to the category of substances that have poor pot life, are easily eluted into liquid crystals, and are inferior to other hydrazides in contaminating liquid crystals.
[0006] In addition, sealants containing adipic acid dihydrazide (ADH) and sebacic acid dihydrazide (SDH), which are general hydrazides, as thermosetting agents have the following problem. Small light leakage occurs near the cured product of the sealant of the liquid crystal display element
[0007] For this problem, for example, a sealant containing 1,3-bis(hydrazinocarbonethyl) 5-isopropylhydantoin (VDH) or isophthalic acid dihydrazide (IDH) as a thermal curing agent can Prevents small light leakage from many places near the cured sealant of the liquid crystal display element produced by the dropping technique, but there are problems of poor pot life and poor thermosetting properties

Method used

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  • Sealing material for liquid-crystal dropping process, vertical-conduction material, and liquid-crystal display element
  • Sealing material for liquid-crystal dropping process, vertical-conduction material, and liquid-crystal display element
  • Sealing material for liquid-crystal dropping process, vertical-conduction material, and liquid-crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] 40 parts by weight of partially acrylated epoxy resin (made by Daicel-UCB company, UVAC1561), 20 parts by weight of bisphenol A epoxy acrylate resin (made by Daicel-UCB company, EB3700), free radical polymerization initiator (Ciba Specialty Chemicals Co., Ltd., Irgacure 651) was blended in 2 parts by weight, heated and melted at 80° C., and then stirred using a planetary stirrer to obtain a mixture.

[0108] 15 parts by weight of spherical silica (manufactured by Admatex Co., Ltd., SO-C1), 5 parts by weight of a thermosetting agent (manufactured by Japan FineChem Co., Ltd., OADH: oxalic acid dihydrazide), and a coupling agent ( Shin-Etsu Chemical Co., Ltd., KBM403) was blended in 1 part by weight, stirred by a planetary mixer, and then dispersed by a ceramic three-roller mill to obtain a sealant.

[0109] Disperse 1 part by weight of spacer particles (Micropearl SP-2055 manufactured by Sekisui Chemical Industry Co., Ltd.) in 100 parts by weight of the obtained sealant, ...

Embodiment 2

[0112] A liquid crystal display element was obtained in the same manner as in Example 1 except that the thermosetting agent was changed from OADH to MDH (malonic acid dihydrazide, manufactured by Nippon FineChem Corporation).

Embodiment 3

[0114] A liquid crystal display element was obtained in the same manner as in Example 1, except that the thermosetting agent was changed from OADH to MADH (malic acid dihydrazide, manufactured by Nippon FineChem Co., Ltd.).

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Abstract

A sealing material for use in liquid-crystal dropping processes which has an excellent pot-life, has the excellent property of not contaminating liquid crystals, and enables the production of a liquid-crystal display of high picture quality; a vertical-conduction material; and a liquid-crystal display element. The sealing material for use in liquid-crystal dropping processes comprises a (meth)acrylic resin and / or a resin having a cyclic ether group and a heat-curing agent having a structure represented by the following general formula (1). [Chemical formula 1] (1) In the general formula (1), X is a structure represented by (CHR)n, wherein R represents OH and / or H and n is 0 to 3.

Description

technical field [0001] The present invention relates to a sealant for liquid crystal dropping technology, a vertical conduction material, and a liquid crystal display element that are excellent in pot life, excellent in stain resistance of liquid crystal, and capable of manufacturing a liquid crystal display device with high display quality. Background technique [0002] In recent years, liquid crystal display panels have been widely used as display panels of various devices such as thin televisions, personal computers, and mobile phones. [0003] For the production method of liquid crystal display elements such as liquid crystal display panels, for the purpose of shortening the production tact time, the conventional vacuum injection method is changing to the so-called dropping technology using a sealant composed of a curable resin composition. Liquid crystal drop method. In the dropping technique, first, a rectangular seal pattern is formed by dispensing on one of the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1339G02F1/1345C09K3/10
CPCC08G59/1466C08L71/00C09J4/06C09J133/062G02F2001/13415C08G59/4035G02F1/1339C09J133/14C08L2666/14G02F1/13415C09K3/10G02F1/13
Inventor 松田正则
Owner SEKISUI CHEM CO LTD
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