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Adhesive composition, adhesive, adhesive sheet, and display

A composition and adhesive technology, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problem of poor touch panel drive and achieve excellent colorless transparency and anti-foaming properties, the effect of suppressing changes in resistance value

Active Publication Date: 2020-11-10
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a conventional adhesive is used in contact with the above-mentioned metal electrodes, the resistance value of the metal electrodes changes over time or under high-temperature and high-humidity conditions, and poor driving of the touch panel may occur.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] 1. Preparation of (meth)acrylate polymer (A)

[0169] 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 using the method mentioned later, the weight average molecular weight (Mw) was 600,000.

[0170] 2. Preparation of adhesive composition

[0171] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above-mentioned step 1 (solid content conversion value; the same below) was mixed with the following structural formula (3) as the compound (B)

[0172]

[0173] (In the formula, n is 8), 1.0 parts by mass of the compound represented by the following structural formula (2) as the compound (C)

[0174]

[0175] (where, R 1 and R 2 is 2-ethylhexyl, R 3 0.2 parts by mass of a compound represented by methyl), 0.4 parts by mass of trimethyl...

Embodiment 2～6、 comparative example 1～3

[0190] [Examples 2-6, Comparative Examples 1-3, Reference Example 1]

[0191] In addition to the type and ratio of each monomer constituting the (meth)acrylate polymer (A), the compounding amount of the compound (B), the compounding amount of the compound (C), the compounding amount of the crosslinking agent (D), and Except having changed the kind of silane coupling agent (E) as shown in Table 1, it carried out similarly to Example 1, and produced the adhesive sheet. In addition, in Comparative Example 2, 2,2-dihydroxy-4-methoxybenzophenone, which is an ultraviolet absorber (benzophenones), was used instead of the compound (B).

[0192] Here, the above-mentioned weight average molecular weight (Mw) is a weight average molecular weight in terms of polystyrene measured (GPC measurement) under the following conditions using gel permeation chromatography (GPC).

[0193]

[0194] ・GPC measuring device: HLC-8020 manufactured by TOSOH CORPORATION

[0195] ・GPC column (passed in t...

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Abstract

The present invention provides an adhesive composition, an adhesive, an adhesive sheet, and a display body capable of suppressing changes in the resistance value of metal wiring and having excellent colorless transparency and anti-foaming properties. The adhesive composition contains a (meth)acrylate polymer (A), a compound (B) having a skeleton represented by the following structural formula (1), and a compound (C) having a skeleton represented by the following structural formula (2). ), in formula (2), R 1 and R 2 Each independently is an alkyl group having 1 to 20 carbon atoms optionally having a substituent or a heteroatom, an aryl group having 6 to 14 carbon atoms optionally having a substituent or a heteroatom, or a hydrogen atom. In addition, R 3 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom.

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, touch panels have been increasingly used as displays in various mobile electronic devices such as smartphones and tablet terminals. There are a resistive film type, a capacitive type, etc. as a touch panel system, and the above-mentioned portable electronic equipment mainly adopts a capacitive type. [0003] Recently, as an electrode material for touch panels, metal electrodes composed of mesh metal wiring, such as silver electrodes, have been studied instead of transparent conductive films composed of tin-doped indium oxide (ITO), especially silver electrodes. Electrodes made of nanowires are considered to be powerful electrodes. However, when a conventional adhesive is used in contact with the above-mentioned metal electrodes, the resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/30
CPCC09J7/00C09J11/06C09J133/08C08K5/5435C08K5/3475C08K5/205C09J2433/00C09J7/40C09J133/10B32B7/12B32B2457/20
Inventor 高桥洋一荒井隆行小泽祐树
Owner LINTEC CORP
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