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Adhesive composition, adhesive sheet and display body

A composition and adhesive technology, applied in the direction of non-polymer organic compound adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of electrode disconnection, short circuit, and the touch panel cannot be driven normally. achieve the effect of preventing and inhibiting migration

Active Publication Date: 2017-01-11
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this migration occurs, the touch panel cannot be driven normally
Especially recently, the miniaturization and narrow pitch of the electrodes are progressing, and the disconnection and short circuit of the electrodes due to migration are prone to occur.

Method used

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  • Adhesive composition, adhesive sheet and display body
  • Adhesive composition, adhesive sheet and display body
  • Adhesive composition, adhesive sheet and display body

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0091] (7) Preparation of adhesive composition

[0092] The adhesive composition P can be prepared by preparing (meth)acrylate polymer (A), and combining the obtained (meth)acrylate polymer (A) with a silane coupling agent (B) having a mercapto group and active energy The radiation curable component (C) is mixed, and it prepares by adding a crosslinking agent (D), a photoinitiator (E), and an additive as needed.

[0093] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomer units constituting a polymer by a normal radical polymerization method. The polymerization of a (meth)acrylate polymer (A) can be performed by a solution polymerization method etc. using a polymerization initiator as needed. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and two or more of them may be used in combination.

[0094] As a polymerization initiator, an az...

Embodiment 1

[0157] 1. Preparation of (meth)acrylate copolymer

[0158] A (meth)acrylate polymer (A) was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate. When the molecular weight of this (meth)acrylate polymer (A) was measured by the method mentioned later, it was 600,000 in weight average molecular weight (Mw).

[0159] 2. Preparation of Adhesive Composition

[0160] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step 1 (solid content conversion value; hereinafter the same), 3-mercaptopropyl trimethyl as the silane coupling agent (B) having a mercapto group Cocondensate of oxysilane and methyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "X-41-1810", oligomer type, mercapto group equivalent: 450 g / mole) 0.20 Parts by mass, ε-caprolactone-modified tris-(2-acryloyloxyethyl)isocyanurate (manufactured by Shin-Nakamura Chemical...

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Abstract

To provide an adhesive composition, an adhesive sheet and a display body capable of effectively preventing / suppressing migration. The adhesive composition forms the adhesive so as to bond a first display body constructing member with a second display body constituting member, wherein the first display body constituting member at least has stepped difference on the bonding surface; the first display body constructing members and / or the second display body constructing member at least have an electrode on the bonding surface; the adhesive composition contains a (meth) acrylate polymer (A), a silane coupling agent (B) having a mercapto group, and an active energy ray curable component (C).

Description

technical field [0001] The present invention relates to an adhesive composition and an adhesive sheet that can be used for displays such as touch panels, and a display using them. Background technique [0002] In recent years, various mobile electronic devices such as smartphones and tablet computers have increasingly used touch panels as displays. There are a resistive film type, a capacitive type, etc. as a form of a touch panel, and the capacitive type is mainly used for the above-mentioned mobile electronic device. [0003] Recently, the size of touch panels has been increased, and mesh-shaped metal electrodes, such as copper electrodes or silver electrodes, have been studied as electrode materials for these touch panels. However, when a conventional adhesive is used in contact with a metal electrode, especially a copper electrode or a silver electrode, ion migration (=electrochemical migration; hereinafter, simply referred to as "migration") may occur. Specifically, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J4/02C09J4/06C09J11/06C09J7/00G09F9/00
CPCG09F9/00C09J4/06C09J7/00C09J11/06C09J133/08C08K5/548C09J7/40C09J133/10
Inventor 小泽祐树荒井隆行高桥洋一
Owner LINTEC CORP