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Display sealant and liquid crystal display

A display and sealant technology, which is applied in the direction of instruments, adhesives, adhesive types, etc., can solve the problems that products with sufficient performance have not yet been realized, and achieve the effect of excellent bonding strength

Pending Publication Date: 2020-09-22
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, products with sufficient performance to accommodate such flexible substrates have not yet been realized

Method used

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  • Display sealant and liquid crystal display
  • Display sealant and liquid crystal display

Examples

Experimental program
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Effect test

Embodiment

[0110] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to an Example. In addition, "parts" and "%" herein are based on mass unless otherwise specified.

Synthetic example 1

[0112] In the flask equipped with a thermometer, a cooling tube, and a stirring device, 555.5 g of dimer alcohol (PRIPOL (PRIPOL) 2033, hydroxyl value 202.0 mgKOH / g manufactured by Croda (CRODA) company), 555.5 g, isophorone di 333.5 g of isocyanate (VESTANAT IPDI manufactured by Evonik, molecular weight 222.3) was reacted at 80°C.

[0113] The isocyanate content at this time was determined by adding excess amine and performing back titration with hydrochloric acid, and it was confirmed that the value was within the range of plus or minus 2% of the remaining isocyanate content obtained from the calculated value.

[0114] Next, 0.5 g of methquinone (polymerization inhibitor), 119.6 g of 2-hydroxyethyl acrylate (molecular weight: 116.1), and 0.3 g of dibutyltin dilaurate (catalyst) were added, stirred at 80° C., and reacted until infrared rays absorbed The absorption spectrum of the isocyanate group in the spectrum (2280cm -1 ) disappeared, and a urethane acrylate with a weight...

Synthetic example 2

[0116] In a flask equipped with a thermometer, a cooling pipe, and a stirrer, 2244.4 g of dimer acid polyester polyol (PRIPLAST 3199 manufactured by CRODA, hydroxyl value 50.0 mgKOH / g) is charged , 444.6 g of isophorone diisocyanate (VESTANAT IPDI by Evonik, molecular weight 222.3) was reacted at 80 degreeC.

[0117] The isocyanate content at this time was determined by adding excess amine and performing back titration with hydrochloric acid, and it was confirmed that the value was within the range of plus or minus 2% of the remaining isocyanate content obtained from the calculated value.

[0118] Next, 1.5 g of methaquinone (polymerization inhibitor), 239.2 g of 2-hydroxyethyl acrylate (molecular weight: 116.1), and 0.9 g of dibutyltin dilaurate (catalyst) were added, stirred at 80° C., and reacted until infrared absorption The absorption spectrum of the isocyanate group in the spectrum (2280cm -1 ) disappeared, and a urethane acrylate with a weight average molecular weight ...

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Abstract

The present invention relates to a display sealant, which can also be applied to a flexible display or a curved display. The present invention relates to the display sealant, and more specifically, toa sealing agent for a display containing a compound having a specific structure in the molecule. The sealant for a display has excellent adhesion strength with an adherend, has both flexibility and low moisture permeability, and is therefore useful as a sealant for a display or a flexible display or a curved display, which particularly requires adhesion to an organic film. A sealing agent for displays, which contains (A) a urethane (meth) acrylate that is obtained by reacting (a) a polyol, (b) an organic polyisocyanate and (c) a hydroxyl group-containing (meth) acrylate, and which contains, as component (a), a dimer alcohol or a polyester diol containing a dimer alcohol and a polycarboxylic acid.

Description

technical field [0001] The present invention relates to a sealant for displays which can also be applied to flexible displays or curved displays. Since this sealing compound for displays can balance flexibility and low moisture permeability, it is useful as a sealing compound for flexible displays or curved displays in particular. [0002] Furthermore, since the sealant rich in flexibility like the present invention has excellent adhesive strength with an adherend, it is also useful for applications requiring high adhesive strength. Background technique [0003] As for the sealing agent for displays, the sealing agent for liquid crystal displays, the sealing agent for organic electroluminescent (Electro-Luminescence, EL) displays, the adhesive agent for touch panels, etc. are mentioned, for example. What these materials have in common is that they need to have excellent hardenability, and at the same time, there is little outgassing so as not to cause damage to the display ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J175/14C09J11/06C09J11/08G02F1/1339
CPCC09J163/10C09J11/06C09J11/08G02F1/1339C08L2205/035C08L2205/025C08L2205/03C08L2203/206C08L75/14C08L33/04C08K5/34924C08G18/6633C08G18/48C08G18/348G02F1/13398
Inventor 武藤正嘉小渊香津美内藤正弘木田昌博田上胜大
Owner NIPPON KAYAKU CO LTD
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