Liquid crystal sealing agent, method for manufacturing liquid crystal display panel using the liquid crystal sealing agent, and liquid crystal display panel

A liquid crystal sealant and a general formula technology, applied in chemical instruments and methods, other chemical processes, optics, etc., can solve problems such as reduced bonding strength, low liquid crystal solubility, and reduced quality of liquid crystal display panels

Active Publication Date: 2009-08-19
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the uncured part remains in the cured product of the liquid crystal sealant, not only the liquid crystal will be contaminated, but also the bonding strength between the substrate constituting the liquid crystal display panel and the cured product of the liquid crystal sealant will decrease, resulting in a possibility of lowering the quality of the liquid crystal display panel very high
Therefore, from the viewpoint of preventing contamination of the liquid crystal and improving the adhesive strength, it is expected to propose a liquid crystal sealing agent that cures to every corner in a short time and suppresses the uncured portion in the cured product to a minimum. Small to such a degree, the curability is high and good, and the solubility to liquid crystal is low

Method used

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  • Liquid crystal sealing agent, method for manufacturing liquid crystal display panel using the liquid crystal sealing agent, and liquid crystal display panel
  • Liquid crystal sealing agent, method for manufacturing liquid crystal display panel using the liquid crystal sealing agent, and liquid crystal display panel
  • Liquid crystal sealing agent, method for manufacturing liquid crystal display panel using the liquid crystal sealing agent, and liquid crystal display panel

Examples

Experimental program
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Effect test

preparation example Construction

[0364] (Preparation method of liquid crystal sealant)

[0365] The method of preparing the liquid crystal sealing compound of this invention is not specifically limited, A well-known technique can be used. In addition, examples of means for mixing the components of the liquid crystal sealing agent include twin-arm mixers, roll kneaders, twin-screw extruders, ball mill kneaders, and planetary mixers, but are not particularly limited, and known kneading The machine will do. The liquid crystal sealing agent mixed appropriately by any method is filtered with a filter to remove impurities. Then, after vacuum defoaming treatment, it is sealed and filled into glass bottles or plastic containers, and stored and transported as needed.

[0366] (Manufacturing method of liquid crystal display panel)

[0367] Next, the method of manufacturing the liquid crystal display panel of the present invention will be described. The liquid crystal sealing compound of the above-mentioned present ...

Embodiment

[0383] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples of the present invention. However, this invention is not limited to the form shown below.

[0384] (a) Compounds containing (meth)acryloyl and glycidyl groups in the molecule and having a number average molecular weight of 500-2000

[0385] As (a) component, the compound synthesize|combined in the following synthesis examples 1-10 was used, respectively. Among them, the compounds synthesized in Synthesis Examples 1 to 4 correspond to the first (a) component, and the compounds synthesized in Synthesis Examples 7 to 10 correspond to the second (a) component. In addition, the compounds synthesized in Synthesis Examples 5 and 6 have predetermined organic groups in their molecules, but their number average molecular weights are outside the range of 500 to 2,000.

[0386] In each synthesis example, the acid value of the reaction mixture sampled at any stag...

Synthetic example 1

[0389] In Synthesis Example 1, compound A1 containing a (meth)acryloyl group and a glycidyl group was synthesized by reacting glycerin acrylate methacrylate-modified phthalic acid with bisphenol F diglycidyl ether.

[0390] First, in a 500ml four-necked flask equipped with a stirrer, a gas inlet tube, a thermometer, and a condenser tube, 74 g (0.5 mol) of phthalic anhydride, 271 g (0.5 mol) of glycerol acrylate methacrylate, and 0.7 g of tributylammonium bromide and 0.5 g of phenothiazine as a polymerization inhibitor were mixed, heated to 80° C., and reacted for 1 hour, and then heated to 130° C., and reacted for 2 hours.

[0391] 276 g (0.4 mol) of the reaction product, bisphenol F type epoxy resin (EPOTOHTOYDF-8170C, manufactured by Tohto Chemical Co., Ltd.) 125 g (0.4 mol), 0.6 g of tributylammonium bromide as a catalyst, and 0.6 g of tributylammonium bromide as a catalyst. Add 0.1 g of hydroquinone monomethyl ether as a polymerization agent into a 500 ml four-necked flask...

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Abstract

This invention provides a liquid crystal sealing agent which can be applied to liquid crystal display panels. The liquid crystal sealing agent comprises (a) a compound containing a (meth)acryloyl group and a glycidyl group in its molecule and having a number average molecular weight of 500 to 2000, (b) a heat latent curing agent, (c) a radical polymerization initiator, and (d) a filler. The component (a), despite its high molecular weight, has high reactivity and latent curability, and thus simultaneously has a low level of solubility in liquid crystals, a high level of curability, and a high level of viscosity stability. Accordingly, the manufacture of a liquid crystal display panel using the liquid crystal sealing agent is advantageous in that, while maintaining the high level of productivity, the strength of adhesion between a substrate and a cured product of the liquid crystal sealing agent is high and the contamination of the liquid crystal can be suppressed on a low level, resulting in the manufacture of liquid crystal display panels which can realize a high level of display and a high quality.

Description

technical field [0001] This invention relates to the manufacturing method of a liquid crystal sealing compound, the liquid crystal display panel using the same, and a liquid crystal display panel. Background technique [0002] In recent years, with the advancement of broadband and the development of small electronic devices such as digital cameras and mobile phones, the demand for liquid crystal display panels as flat panel displays has been extremely expanded in terms of thinness, light weight, and low power consumption. A liquid crystal display panel has a structure in which liquid crystal is sealed between two transparent substrates bonded with a liquid crystal sealant, and is a device that displays images by adjusting the modulation of light transmitted through the substrate by controlling the orientation of the liquid crystal by applying a voltage to the liquid crystal . [0003] In the past, liquid crystal display panels were mainly manufactured by liquid crystal inje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1339C07D301/08C07D303/26C08F20/32
CPCC08F220/32C07D301/08C07D303/26C09K3/10G02F1/1339
Inventor 宫胁孝久种市大树成濑洋市川真一郎川崎登高木正利
Owner MITSUI CHEM INC
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