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Liquid crystal sealing agent and liquid crystal display cell using the same

A liquid crystal display unit, liquid crystal sealant technology, applied in the direction of adhesives, adhesive types, epoxy resin glue, etc., can solve the problem of unrevealed polyvalent carboxylic acid liquid crystal sealant, pollution of liquid crystal display area, reduction of liquid crystal resistivity, etc. problems, to achieve excellent low-temperature curability, long storage period, and non-polluting effects

Active Publication Date: 2009-07-15
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the liquid crystal dropping method, because the uncured liquid crystal sealing agent is directly contacted with the liquid crystal, the main problem is that the components of the liquid crystal sealing agent are extracted into the liquid crystal and pollute the display area of ​​the liquid crystal. From the perspective of the reliability of the liquid crystal display unit, a low-pollution liquid crystal sealant is required
The disadvantage of cationic polymerized liquid crystal sealant is poor reliability, because the cationic components generated during photocuring will contaminate the liquid crystal and reduce the resistivity of the liquid crystal
In addition, there is a problem with the radical polymerization type liquid crystal sealant that the cure shrinkage is large during photocuring, resulting in insufficient adhesive strength
[0009] Meanwhile, regarding resin compositions using dihydrazide compounds, Patent Document 2 discloses that polyvalent carboxylic acids are effective as curing accelerators for curable systems consisting of epoxy resins and dihydrazide curing agents, but this patent document does not disclose Possibility of using such polyvalent carboxylic acids as liquid crystal sealants

Method used

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  • Liquid crystal sealing agent and liquid crystal display cell using the same
  • Liquid crystal sealing agent and liquid crystal display cell using the same
  • Liquid crystal sealing agent and liquid crystal display cell using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 75 parts by weight of epoxy acrylate resin KAYARAD R-94220 (produced by Nippon Kayaku Co., Ltd.; bisphenol F epoxy resin of epoxy acrylate), 25 parts by weight of epoxy resin RE-203 (produced by Nippon Kayaku Co. ., Ltd. production; Epoxy equivalent is 233 grams / equivalent, the bisphenol S type epoxy resin of ethylene oxide-addition), 5 parts by weight photoinitiator KAYACURE RPI-4 (by Nippon Kayaku Co., Ltd. ( NipponKayaku Co., Ltd.) production; 2-isocyanatoethylacrylate methyl ester and 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropan-1-one reaction product) and 1.5 parts by weight of a silane coupling agent Sila-Ace S-510 (produced by Chisso Corp.; 3-glycidoxypropyltrimethoxysilane) were mixed to obtain a resin solution . Then, using a ball mill, 17.5 parts by weight of Nanotec Alumina SPC (manufactured by CI Kasei Co., Ltd.; spherical alumina with an average particle size of 50 nm) was used as a filler and 3 parts by weight of butadiene-formazine Alkyl acryl...

Embodiment 2

[0064] With 75 parts by weight of epoxy acrylate resin KAYARAD R-94220 (produced by Nippon Kayaku Co., Ltd.; bisphenol F epoxy resin of epoxy acrylate), 25 parts by weight of epoxy resin RE-203 (by Nippon Kayaku Co., Ltd. Company production; Epoxy equivalent is 233 grams / equivalent, the bisphenol S type epoxy resin of oxirane-addition), 5 weight parts photoinitiators KAYACURE RPI-4 (produced by Nippon Kayaku Co., Ltd.; 2- The reaction product of methyl isocyanatoethacrylate and 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropan-1-one) and

[0065] 1.5 parts by weight of a silane coupling agent Sila-Ace S-510 (manufactured by Chisso Corp.; 3-glycidoxypropyltrimethoxysilane) was mixed to obtain a resin solution. Then, using a ball mill, 17.5 parts by weight of Nanotec Alumina SPC (manufactured by CI Chemical Industry Co., Ltd.; spherical alumina with an average particle size of 50 nm) as a filler and 3 parts by weight of butadiene-alkylmethacrylate-styrene copolymerized A s...

Embodiment 3

[0067] With 75 parts by weight of epoxy acrylate resin KAYARAD R-94220 (produced by Nippon Kayaku Co., Ltd.; bisphenol F epoxy resin of epoxy acrylate), 25 parts by weight of epoxy resin RE-203 (by Nippon Kayaku Co., Ltd. Company production; Epoxy equivalent is 233 grams / equivalent, the bisphenol S type epoxy resin of oxirane-addition), 5 weight parts photoinitiators KAYACURE RPI-4 (produced by Nippon Kayaku Co., Ltd.; 2- The reaction product of methyl isocyanatoethacrylate and 2-hydroxy-1-[4-(2-hydroxyethoxy) phenyl]-2-methylpropan-1-one) and 1.5 parts by weight of silane coupling Sila-Ace S-510 (manufactured by Chisso Corp.; 3-glycidoxypropyltrimethoxysilane) was mixed to obtain a resin solution. Then, using a ball mill, 17.5 parts by weight of Nanotec Alumina SPC (manufactured by CI Chemical Industry Co., Ltd.; spherical alumina with an average particle size of 50 nm) as a filler and 3 parts by weight of butadiene-alkylmethacrylate-styrene copolymerized A substance (produc...

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Abstract

To provide a liquid crystal sealing agent which shows excellent curability at low temperatures, is less likely to contaminate a liquid crystal, and has a long pot-life, good coating workability on a substrate, good laminating property, and good adhesion strength, and also provide a liquid crystal sealing agent which is useful in the one drop fill of a thermocurable liquid crystal. A liquid crystal sealing agent comprising (a) a dihydrazide compound, (b) one or more members selected from an epoxy resin, a (meth)acrylated epoxy resin and a partially (meth)acrylated epoxy resin as a curable resin component, and (c) a polycarboxylic acid as a curing-accelerating agent.

Description

technical field [0001] The invention relates to a liquid crystal sealing agent and a liquid crystal display unit made by using the sealing agent. More specifically, the present invention relates to a liquid crystal sealant suitable for manufacturing a liquid crystal display unit by a liquid crystal dropping process, and a liquid crystal display unit manufactured by this method. Background technique [0002] In recent years, along with the increase in size of liquid crystal display units, a so-called liquid crystal dropping method having higher mass productivity has been widely used as a method of manufacturing liquid crystal display units. In the liquid crystal dropping method, liquid crystal is dropped into a bank of a liquid crystal sealing material formed on a substrate, and another substrate is laminated thereon, thereby manufacturing a liquid crystal display unit in which the liquid crystal is sealed. However, in the liquid crystal dropping method, because the uncured ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1339C09K3/10
CPCC09J163/00C08G59/42G02F1/1339C09K3/10
Inventor 浅野丰文木田昌博并木务落直之太田英之今泉雅裕平野雅浩
Owner NIPPON KAYAKU CO LTD
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