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Liquid crystal sealant and liquid crystal display unit using same

A liquid crystal sealant, liquid crystal technology, applied in the directions of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor display, decreased adhesive strength, low liquid crystal pollution, etc. Achieve the effects of excellent storage stability, enhanced adhesive strength, and good display characteristics

Inactive Publication Date: 2016-03-02
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the liquid crystal dripping method has the following problems: since the uncured liquid crystal sealing agent is in contact with the liquid crystal, the components of the liquid crystal sealing agent are dissolved (eluted) in the liquid crystal at this time, and the resistance value of the liquid crystal is lowered, resulting in cracks near the sealing. poor display
[0008] However, the addition of curing accelerators such as these thermal radical initiators and polycarboxylic acids has disadvantages such as increasing the curing shrinkage rate due to the effect of increasing the reaction speed, thereby reducing the adhesive strength or worsening the storage stability.
[0009] As mentioned above, although great efforts have been made to develop a liquid crystal sealing agent for the liquid crystal dropping method, liquid crystal sealing with good adhesive strength and storage stability while achieving low liquid crystal contamination has not yet been realized. agent

Method used

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  • Liquid crystal sealant and liquid crystal display unit using same

Examples

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Embodiment

[0082] Hereinafter, the present invention will be described in more detail using synthesis examples and examples, but the present invention is not limited to the examples. It should be noted that, unless otherwise specified, "parts" and "%" herein are based on mass.

Synthetic example 1

[0084] [Synthesis of resorcinol diglycidyl ether]

[0085] [Process 1]

[0086] Add 5,500 g of resorcinol, 37,000 g of epichlorohydrin, and 500 g of tetramethylammonium chloride into a flask equipped with a thermometer, dropping funnel, cooling tube, and stirrer, dissolve under stirring, and heat up to 70°C. Next, 4000 g of flaky sodium hydroxide was added stepwise over 100 minutes, and post-reaction was performed at 70° C. for 1 hour. After completion of the reaction, 15,000 g of water was added to wash with water, and excess epichlorohydrin and the like were distilled off from the oil layer at 130° C. under reduced pressure. 22200 g of methyl isobutyl ketone was added and dissolved in the residue, and the temperature was raised to 70°C. Add 1000g of 30% sodium hydroxide aqueous solution under stirring, react for 1 hour, then wash with water 5550g three times, and distill off methyl isobutyl ketone under reduced pressure at 180°C to obtain resorcinol disulfide Glyceryl eth...

Synthetic example 2

[0088] [Synthesis of acrylated product of resorcinol diglycidyl ether]

[0089] 181.2 g of resorcinol diglycidyl ether obtained in Synthesis Example 1 above was dissolved in 266.8 g of toluene, 0.8 g of dibutylhydroxytoluene as a polymerization inhibitor was added thereto, and the temperature was raised to 60°C. Thereafter, after adding 117.5 g of acrylic acid of 100% equivalent of the epoxy group, the temperature was raised to 80° C., 0.6 g of trimethylammonium chloride was added there as a reaction catalyst, and stirred at 98° C. for about 30 hours. The obtained reaction liquid was washed with water, and toluene was distilled off to obtain 253 g of the target acrylated product of resorcinol diglycidyl ether.

[0090] [Refer to Synthesis Example 1]

[0091] [Synthesis of Acrylate of Bisphenol A Epoxy Resin]

[0092] Bisphenol A type epoxy resin 282.5g (product name: YD-8125, Nippon Steel Chemical Co., Ltd. system) is dissolved in toluene 266.8g, adds therein 0.8g of dibutyl...

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Abstract

The invention relates to a liquid crystal sealant and a liquid crystal display unit using the same. The liquid crystal sealant is cured by light and / or heat and can be applied to a liquid crystal instillation method. The sealant is less pollutant for liquid crystal, and thus the liquid crystal display unit becomes finer, can be driven by low voltage, can respond rapidly, and has a long service life. Due to excellent adhesive strength, the liquid crystal panel has the advantages of vibration resistance, impact resistance, dustproof property, and durability. The liquid crystal sealant for liquid crystal instillation method comprises (A) epoxy compounds and (B) organic filling materials according to a weight ratio of 1:6-1:20.

Description

technical field [0001] The present invention relates to a liquid crystal sealing compound for a liquid crystal dropping method that is cured with light and / or heat. More specifically, the present invention relates to a liquid crystal sealing agent for a liquid crystal dropping method that has low liquid crystal contamination, high adhesive strength, and does not peel off upper and lower substrates during photocuring and / or thermal curing during panel production. Background technique [0002] With the increase in size of liquid crystal display units in recent years, a so-called liquid crystal dropping method with higher mass productivity has been proposed as a method of manufacturing liquid crystal display units (see Patent Document 1 and Patent Document 2). Specifically, it is the manufacturing method of the liquid crystal display unit which seals a liquid crystal by bonding the other board|substrate together after liquid crystal is dripped inside the bank of the liquid crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/08C09J11/06G02F1/1339
Inventor 木村早纪坂野常俊
Owner NIPPON KAYAKU CO LTD
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