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Sealing material for liquid crystal dispensing method, transfer material and liquid crystal displays

A liquid crystal dropping and sealing agent technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as difference in sealing amplitude, shortening time, and liquid crystal pollution

Active Publication Date: 2012-07-18
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in this production method, there are problems such as positional deviation due to deformation due to heating, gap unevenness, and adhesion between the sealant and the substrate are reduced, or residual solvent thermally expands to generate air bubbles to cause gap unevenness or sealing. The amplitude difference, or the time required for sealing and curing is long, or the pre-baking process is complicated, or the time that can be used as a sealant due to solvent volatilization is shortened, or it takes time to inject liquid crystal, etc.
However, even when a liquid crystal display element is produced by the dropping technique using the above sealant, liquid crystal contamination may actually occur, and a liquid crystal display element with less color unevenness and high-quality images cannot be produced.

Method used

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  • Sealing material for liquid crystal dispensing method, transfer material and liquid crystal displays
  • Sealing material for liquid crystal dispensing method, transfer material and liquid crystal displays
  • Sealing material for liquid crystal dispensing method, transfer material and liquid crystal displays

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Mix 100 parts by weight of partially modified resin (2) synthesized, 2 parts by weight of photoradical initiator (manufactured by Chiba Seika Co., Ltd., IRGACURE OXEO1), 16 parts by weight of thermosetting agent (manufactured by Ajinomoto Fine Chemicals Co., Ltd., Amicure VDH), 30 parts by weight of spherical silica (manufactured by Admatechs, SO-C1) and 2 parts by weight of a silane coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., KBM403) as fillers, and a planetary agitator (manufactured by Thinky Corporation, あわとり内太郎) was stirred, and mixed uniformly with a ceramic three-roll machine to obtain a sealant for liquid crystal dropping technology.

Embodiment 2

[0100] Blend 50 parts by weight of synthetic epoxy acrylate (1), 50 parts by weight of partially modified resin (4) synthesized, 2 parts by weight of photoradical initiator (manufactured by Chiba Seika Co., Ltd., IRGACUREOXEO1), 16 parts by weight Thermosetting agent (manufactured by Ajinomoto Fine Chemicals Co., Ltd., Amicure VDH), 30 parts by weight of spherical silica (manufactured by Admatechs, SO-C1) as a filler, and 2 parts by weight of a silane coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., KBM403) was stirred with a planetary stirrer (manufactured by Thinky Corporation, Awatori Rentaro), and then uniformly mixed with a ceramic three-roll machine to obtain a sealing compound for liquid crystal dropping technology.

Embodiment 3

[0102] Mix 100 parts by weight of partially modified resin (2) synthesized, 5 parts by weight of photoradical initiator (manufactured by Chiba Seika Co., Ltd., IRGACURE OXEO1), 16 parts by weight of thermosetting agent (manufactured by Ajinomoto Fine Chemicals Co., Ltd., Amicure VDH), 30 parts by weight of spherical silica (manufactured by Admatechs, SO-C1) and 2 parts by weight of a silane coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., KBM403) as fillers, and a planetary agitator (manufactured by Thinky Corporation, あわとり内太郎) was stirred, and mixed uniformly with a ceramic three-roll machine to obtain a sealant for liquid crystal dropping technology.

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Abstract

The invention aims at providing a sealing material for liquid crystal dispensing method which dose not contaminate a liquid crystal when used in the production of liquid crystal displays by the dispenser method even if a component of the sealing material is dissolved in the liquid crystal and which makes it possible to produce liquid crystal displays excellent in display quality and reliability. A sealing material for liquid crystal dispensing method which contains both a curable resin and a photo-radical initiator, wherein the photo-radical initiator is one which does not precipitate from a liquid crystal as tested by dissolving the initiator completely in the liquid crystal in a concentration of 4wt% at 120 DEG C and allowing the resulting solution to stand at -20 DEG C for 144 hours and which exhibits an absorptivity of 50mL / gm or above as determined at 405nm in a solvent.

Description

technical field [0001] The present invention relates to a sealant for liquid crystal drop technology that prevents liquid crystal contamination even when sealant components are dissolved in liquid crystal when liquid crystal display elements are produced by drop technology, and can manufacture liquid crystal display elements with excellent display quality and reliability. The invention also relates to the upper and lower conduction material and the liquid crystal display element. Background technique [0002] In the conventional manufacturing method of a liquid crystal display element, at first, on either side of two transparent substrates with electrodes, a seal pattern having a liquid crystal injection port using a thermosetting sealant is formed by screen printing, and then a seal pattern is formed at 60 Pre-baking is carried out at ~100°C to dry the solvent in the sealant. Then, make the two substrates face each other through the separator and align them for lamination,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1339
CPCG02F1/1339
Inventor 山口真史
Owner SEKISUI CHEM CO LTD