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Sealant

A technology of sealant and tackifier, used in instruments, electrical components, circuits, etc., can solve problems such as deterioration of display components

Pending Publication Date: 2020-10-20
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, display devices using display elements such as organic electroluminescent elements (hereinafter referred to as organic EL elements) have been developed, but display elements are generally easily degraded by moisture and oxygen in the atmosphere

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0116] ·Preparation method of sealant

[0117] The sealing agent can be obtained by mixing the above-mentioned components, and mixing them using a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, or a three-roller, for example. In addition, it is more preferable to mix (D) cationic polymerization initiator after mixing components other than (D) cationic polymerization initiator from a viewpoint of mixing a sealing agent stably.

[0118] ·Application of sealant

[0119] The said sealing agent is suitable for sealing of various elements, such as an organic EL element, an LED element, a semiconductor element, and a solar cell element, for example. However, the use is not limited to the surface sealing of an element, For example, it can also be used as a liquid crystal sealing compound of a liquid crystal display device, etc. Moreover, since it is especially excellent in light transmittance, it is suitable as a surface sealing agent for d...

Embodiment

[0129] Hereinafter, the present invention will be described in more detail with reference to examples. The scope of the present invention is not limitedly interpreted by these examples.

[0130] 1. Sealant material

[0131] (A) Alicyclic epoxy compound

[0132] Celloxide CEL8010 (manufactured by Daicel, compound represented by the following formula (estimated), oxygen atom content 16.49%, molecular weight 194)

[0133] [chemical 7]

[0134]

[0135] (B) Oxetane compound

[0136] ・OXT-212 (manufactured by Toagosei Co., Ltd., 3-ethyl-3-[(2-ethylhexyloxy)methyl]oxetane (abbreviation: ethylhexyloxetane), oxygen atom Content rate 14.04%, molecular weight 228)

[0137] [chemical 8]

[0138]

[0139] (C) Tackifier

[0140] ·Styrenic oligomer A

[0141] Homopolymer of isopropenyltoluene (IPT) (styrene-based oligomer, weight average molecular weight: 1200, number average molecular weight: 800)

[0142] ·Styrenic oligomer B

[0143] Homopolymer of isopropenyltoluene (IPT...

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Abstract

The purpose of the present invention is to provide: a sealant that has a viscosity which is suitable for application in an inkjet method, and a cured product of which has a low dielectric constant; and a method of manufacturing a display device using the sealant. For this purpose, the sealant comprises (A) a cycloaliphatic epoxy compound and (B) an oxetane compound. The sealant has a viscosity measured by an E-type viscometer under the conditions of 25 DEG and 20 rpm of 10 to 30 mPa.s, and a cured product thereof cured under UV-LEDs having a wavelength of 395 nm, at an illuminance of 1000 mW / cm2 and a cumulative amount of light of 1500 mJ / cm2 has a dielectric constant at a frequency of 100 kHz of 3.0 or less.

Description

technical field [0001] The present invention relates to a sealant. Background technique [0002] In recent years, display devices using display elements such as organic electroluminescent elements (hereinafter referred to as organic EL elements) have been developed, but display elements are generally easily degraded by moisture and oxygen in the atmosphere. Therefore, in various display devices, generally, the display element is sealed by a sealing layer (surface sealing). In addition, sealing agents are also used to seal various elements such as solar cell elements and semiconductor elements. [0003] For example, in a device including various elements such as an organic EL element, elements such as an organic EL element may be surface-sealed with a cured product of a sealant containing a curable resin. Conventionally, a sealant is usually applied (printed) by a screen printing method. However, in recent years, in order to realize the flexibility of the device, it is req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/04H01L27/32H01L51/50C08K5/1525C08L63/00C09K3/10G09F9/30
CPCH05B33/04C08K5/1525C08L63/00C09K3/10G09F9/30H10K59/8722C08G59/24C09K3/1006H01L23/293H01L33/56
Inventor 山本祐五富田裕介
Owner MITSUI CHEM INC