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Adhesive sheet for metal surface bonding

A technology of adhesive sheet and metal surface, which is applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc. Water-based reduction and other problems, to achieve the effect of corrosion prevention

Active Publication Date: 2014-01-01
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the hydrophilicity of the adhesive layer of the adhesive sheet containing no acid component is lowered, there is a problem that the adhesive layer becomes cloudy under high temperature and high humidity.

Method used

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  • Adhesive sheet for metal surface bonding
  • Adhesive sheet for metal surface bonding
  • Adhesive sheet for metal surface bonding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] After adding 0.1 part by mass of an isocyanate-based crosslinking agent (Coronate HX manufactured by Nippon Polyurethane Co., Ltd., solid content: 75%) to 100 parts by mass of the above-mentioned adhesive composition (a), and stirring for 15 minutes, the silicone compound was placed on the opposite side. On a polyester film having a thickness of 50 μm after peeling treatment (hereinafter #75 peeling film), it was applied so that the thickness after drying would be 50 μm, and dried at 75° C. for 5 minutes. The obtained pressure-sensitive adhesive sheet was bonded to a polyester film with a thickness of 38 μm (the following #38 release film) whose one surface was released with a silicone compound. Thereafter, it was aged at 23° C. for 7 days to obtain a substrate-free PSA sheet having a thickness of 50 μm and a gel percentage of 50%.

Embodiment 2

[0120] Except having used 0.08 mass parts of isocyanate type crosslinking agents, it carried out similarly to Example 1, and obtained the adhesive sheet of 40% of gel percentages.

Embodiment 3

[0122] Except having changed 100 mass parts of adhesive compositions (a) into 100 mass parts of adhesive compositions (b), it carried out similarly to Example 1, and obtained the adhesive sheet of 50% of gel percentages.

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Abstract

An adhesive sheet to be bonded to a metal surface, which comprises an adhesive layer that is formed of an acrylic adhesive that uses a (meth)acrylic acid ester copolymer. The content of a (meth)acrylic acid alkoxyalkyl ester monomer (A) is 50% by mass or more and the content of a (meth)acrylic acid alkyl ester (B) having an acryl group with 1-4 carbon atoms is 5-45% by mass in the monomer components constituting the (meth)acrylic acid ester copolymer, while the content of a carboxyl group-containing monomer is 1% or less in the monomer components constituting the (meth)acrylic acid ester copolymer. Consequently, the adhesive sheet for metal surface bonding is capable of reducing white turbidity and metal corrosion under high temperature high humidity conditions.

Description

technical field [0001] The invention relates to an adhesive sheet attached to a metal surface. Background technique [0002] In recent years, touch sensors have begun to be mounted on electronic devices. Touch sensors for electronic devices are mainly equipped with a resistive film type touch panel that mainly detects the pressure at the time of input, and a capacitive touch panel that uses static electricity from the human body at the time of input to detect the input part. Starting from the versatility of the input method, the electrostatic capacitance method is gradually becoming the mainstream. In a touch panel, a transparent metal film having a conductive layer provided on a transparent film substrate or glass is used. In a capacitive touch panel, the surface of the metal layer of the transparent metal film is bonded with that of a double-sided adhesive sheet. The surface of the adhesive layer is fixed in contact with each other. [0003] The metal layer of the trans...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J133/14
CPCC09J7/02C09J133/14C09J133/062C09J7/00C09J2203/318C09J7/30C09J7/385
Inventor 山川大辅北出祐也高桥佑辅
Owner DIC CORP
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