Liquid crystal display element sealing compound, vertical conduction material, and liquid crystal display element
A liquid crystal display element and sealant technology, applied in chemical instruments and methods, other chemical processes, instruments, etc., can solve problems such as deterioration, brittle impact resistance, and poor softness of cured products, and achieve moisture permeability prevention Excellent, excellent softness effect
Active Publication Date: 2022-07-29
SEKISUI CHEM CO LTD
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Problems solved by technology
However, if a large amount of filler is added to improve the moisture permeability prevention, the cured product may become less flexible and brittle, or the impact resistance may be deteriorated, and it is difficult for conventional sealants to balance impact resistance, flexibility, and moisture permeability resistance.
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～6、 comparative example 1～4
[0130] After mixing each material with a planetary mixer (manufactured by THINKY, "あわとりLentaro") according to the mixing ratios described in Tables 1 and 2, it was further mixed with a three-roll mill to prepare Examples 1 to 6, The sealing compound for liquid crystal display elements of Comparative Examples 1-4.
[0131] Each obtained sealing compound for liquid crystal display elements was irradiated with 100 mW / cm using a metal halide lamp 2 After 30 seconds of ultraviolet rays (wavelength: 365 nm), the cured product was obtained by heating at 120° C. for 1 hour. About the obtained cured product, using a dynamic viscoelasticity measuring apparatus (manufactured by IT Measurement & Control Co., Ltd., "DVA-200"), a test piece with a width of 5 mm, a thickness of 0.35 mm, a clamping width of 25 mm, and a heating rate of 10° C. / The storage elastic modulus at 25°C was measured under the conditions of minutes and a frequency of 5 Hz. The results are shown in Tables 1 and 2.
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Abstract
An object of this invention is to provide the sealing compound for liquid crystal display elements excellent in impact resistance, flexibility, and moisture permeability prevention. Moreover, the objective of this invention is to provide the vertical conduction material and liquid crystal display element which were produced using this sealing compound for liquid crystal display elements. The present invention is a sealant for liquid crystal display elements, comprising a curable resin, a polymerization initiator and / or a thermal curing agent, and an inorganic filler having a hydrophobic group on the surface, and the inorganic filler having a hydrophobic group on the surface is The content ratio is 15% by weight or more, and the storage elastic modulus of the cured product at 25°C is 2.0 GPa or less.
Description
technical field [0001] The present invention relates to a sealing compound for liquid crystal display elements excellent in impact resistance, flexibility, and moisture permeability prevention. Moreover, this invention relates to the vertical conduction material and liquid crystal display element produced using this sealing compound for liquid crystal display elements. Background technique [0002] In recent years, as a method of manufacturing a liquid crystal display element such as a liquid crystal display unit, from the viewpoints of shortening tact time and optimizing the amount of liquid crystal used, a liquid crystal called a dropping process as disclosed in Patent Document 1 and Patent Document 2 has been used. In the dropping method, a photothermal combined curing type sealant containing a curable resin, a photopolymerization initiator, and a thermal curing agent is used in the dropping process. [0003] In the dropping process, first, a frame-shaped sealing pattern...
Claims
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IPC IPC(8): G02F1/1339C09K3/10
CPCC09K3/10G02F1/1339
Inventor 柴田大辅
Owner SEKISUI CHEM CO LTD