Sealant for liquid crystal element, vertical conduction material, and liquid crystal element
A liquid crystal element and sealant technology, applied in chemical instruments and methods, instruments, optics, etc., can solve the problems of insufficient sealant, liquid crystal deterioration, insufficient curing, etc.
Pending Publication Date: 2020-10-13
SEKISUI CHEM CO LTD
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Problems solved by technology
[0005] However, in the narrow bezel design, the sealant is placed directly under the black matrix. Therefore, when the dripping process is performed, the light irradiated when the sealant is photocured is blocked, and the light may not reach the inside of the sealant. and curing becomes insufficient
If the curing of the sealant becomes insufficient in this way, there is a problem that the uncured sealant component is eluted into the liquid crystal, and the curing reaction by the eluted sealant component advances in the liquid crystal, resulting in contamination of the liquid crystal.
[0006] In addition, in general, as a method of photocuring the sealant, irradiation with ultraviolet rays is performed, but especially in the liquid crystal dropping process, since the sealant is cured after dropping the liquid crystal, there is a problem that the liquid crystal is degraded by irradiation of ultraviolet rays.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～9 and comparative example 1～5
[0164] According to the compounding ratios described in Tables 1 and 2, each material was mixed using a planetary mixer (manufactured by Thinky Corporation, "Defoaming Rentaro"), and then further mixed using a three-roll machine, thereby preparing Examples 1 to 9 and comparative The sealing compound for liquid crystal elements of Examples 1-3.
[0165]
[0166] The following evaluation was performed about each sealing compound for liquid crystal elements obtained in the Example and the comparative example. The results are shown in Tables 1 and 2.
[0167] (thixotropic index)
[0168] For each sealing compound for liquid crystal elements obtained in the examples and comparative examples, using an E-type viscometer (manufactured by Toki Sangyo Co., Ltd., "VISCOMETER TV-22") at 25°C, 0.5rpm conditions and 25°C, 5.0rpm Viscosity was measured under conditions.
[0169] The thixotropic index was calculated by dividing the viscosity measured on the condition of 25 degreeC and 0....
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Abstract
The purpose of the present invention is to provide a sealant for a liquid crystal display element, whereby the sealant has excellent deep curing properties with respect to long-wavelength light, and whereby penetration of liquid crystal into the sealant or contamination of the liquid crystal by the sealant can be suppressed. Another purpose of the present invention is to provide a vertical conduction material and a liquid crystal element, which are obtained using the sealant for a liquid crystal element. The present invention is a sealant for a liquid crystal element, containing a curable resin and a photopolymerization initiator, the photopolymerization initiator including a thioxanthone compound and an oxime ester compound.
Description
technical field [0001] This invention relates to the sealing compound for liquid crystal elements which is excellent in deep curability with respect to light of a long wavelength, and can suppress insertion of a liquid crystal into a sealing compound, and liquid-crystal contamination by a sealing compound. Moreover, this invention relates to the vertical conduction material and liquid crystal element which used this sealing compound for liquid crystal elements. Background technique [0002] In recent years, as a method of manufacturing liquid crystal elements such as liquid crystal display units, from the viewpoint of shortening the tact time and optimizing the amount of liquid crystals used, the combination of light and heat as disclosed in Patent Document 1 and Patent Document 2 has been used. The liquid crystal dropping method called the dropping method of the curing type sealant. [0003] In the dropping process, first, a frame-shaped seal pattern is formed on one of tw...
Claims
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IPC IPC(8): G02F1/1339C08F2/50C08F299/02C09K3/10
CPCG02F1/1339C08F299/02C08F2/50C09K3/10C08F222/32C08F220/343
Inventor 山胁大辉樋口勋夫高桥骏介柴田大辅
Owner SEKISUI CHEM CO LTD