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Adhesive composition, adhesive agent, adhesive sheet and display

A display and adhesive technology, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problem that the touch panel cannot be driven normally, and achieve the effect of inhibiting migration

Active Publication Date: 2020-06-12
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such migration occurs, the touch panel cannot be driven normally

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] (5) Preparation of adhesive composition

[0074] Adhesive composition P can be prepared by the following method: prepare (meth)acrylate polymer (A), the obtained (meth)acrylate polymer (A) and the silane coupling agent (B) ) and mix, while adding crosslinking agent (C) and additives as required.

[0075] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomer units constituting the 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.

[0076] As a polymerization initiator, an azo compound, an organic peroxide, etc. are mentioned, and 2 or more types may be used together. Examples of az...

Embodiment 1

[0131] 1. Preparation of (meth)acrylate copolymer

[0132] 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).

[0133] 2. Preparation of Adhesive Composition

[0134] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step 1 (value converted into solid content; the same applies below), 3-mercaptopropane as a silane coupling agent (B) having a mercapto group Cocondensate of methyltrimethoxysilane and methyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "X-41-1810", oligomer type, mercapto group equivalent: 450 g / mole ) 0.05 parts by mass, and 0.23 parts by mass of trimethylolpropane-modified toluene diisocyanate (manufactured by ...

Embodiment 2～10、 comparative example 1～10

[0150] Except that the type and ratio of the silane coupling agent (silane coupling agent (B) and other silane coupling agents with mercapto groups) and the ratio of the crosslinking agent (C) are changed as shown in Table 1, the same as in Example 1 An adhesive sheet was produced in the same manner. In addition, regarding Comparative Examples 7 to 10, N,N-bis(2-ethylhexyl)-(4 or 5)-methyl-1H-benzotriazole-1-methylamine (manufactured by BASF Corporation, trade name "IRGMET 39") was used as a rust inhibitor and was blended in the adhesive composition in the proportion shown in Table 1.

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Abstract

The present invention provides an adhesive composition for forming an adhesive for bonding a first display structural member and a second display structural member having a level difference at least on the surface of the bonded side, wherein the first display The structural member and / or the second display structural member has an electrode at least on the surface of the side to be bonded, and the above-mentioned adhesive composition contains a (meth)acrylate polymer (A) and a silane coupling agent (B) having a mercapto group . According to the adhesive obtained from this adhesive composition, migration on the above-mentioned electrodes can be effectively prevented and suppressed.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive, an adhesive sheet, and a display using them, which can be used for displays such as touch panels. Background technique [0002] In recent years, in various mobile electronic devices such as smart phones and tablet computer terminals, touch panels are often used as displays. As touch panel methods, there are a resistive film method, a capacitive method, and the like, and in the above-mentioned mobile electronic devices, a capacitive method is mainly used. [0003] Recently, the size of the touch panel is being increased, and as an electrode material for such a touch panel, a mesh-shaped metal electrode such as a copper electrode or a silver electrode is being studied. 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 "migrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/04C09J7/10C09J7/30C09J11/06G06F3/041
CPCC09J11/06G06F3/041C09J133/00C09J133/066C09J133/04C09J7/40
Inventor 小泽祐树荒井隆行高桥洋一
Owner LINTEC CORP