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Optical pressure-sensitive adhesive sheet

An adhesive sheet and optical technology, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problems of metal film resistance value change, metal film corrosion, etc., to achieve Excellent non-corrosive effect

Active Publication Date: 2016-08-03
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when an adhesive sheet including an acrylic polymer or the like composed of a carboxyl group-containing monomer is used as an adhesive sheet to be pasted on the above-mentioned metal film and stored under humidified conditions, the Changes in the resistance value of the metal thin film, that is, the problem of corrosion of the metal thin film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0207] Tetrahydrodicyclopentadienyl methacrylate (DCPMA, tetrahydrodicyclopentadienyl methacrylate) 60 parts by weight, methyl methacrylate (MMA, methyl methacrylate) 40 Parts by weight, 3.5 parts by weight of α-thioglycerol as a chain transfer agent, and 100 parts by weight of toluene as a polymerization solvent were put into a four-necked flask, and they were stirred at 70° C. for 1 hour under a nitrogen atmosphere. Then, 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator was put into a four-necked flask, and reacted at 70°C for 2 hours, and then reacted at 80°C for 2 hours. Then, the reaction solution was put into a temperature environment of 130° C., and the toluene, the chain transfer agent, and the unreacted monomer were dried and removed to obtain a solid acrylic polymer (may be referred to as “acrylic polymer (A)”). In addition, the weight average molecular weight of an acrylic polymer (A) was 5100.

Embodiment 1

[0209] In a monomer mixture composed of 67 parts by weight of 2-ethylhexyl acrylate (2EHA), 15 parts by weight of N-vinyl-2-pyrrolidone (NVP), and 18 parts by weight of 2-hydroxyethyl acrylate (HEA), Mix 0.035 parts by weight of a photopolymerization initiator (trade name "Irgacure 651", manufactured by BASF Corporation) and 0.035 parts by weight of a photopolymerization initiator (trade name "Irgacure 184", manufactured by BASF Corporation), and then irradiate ultraviolet rays until the viscosity (BH viscometer, No. 5 Rotor, 10 rpm, measurement temperature 30° C.) to about 20 Pa·s to obtain a prepolymer composition in which a part of the above-mentioned monomer components were polymerized.

[0210] In the above-mentioned prepolymer composition, add 5 parts by weight of the above-mentioned acrylic polymer (A), 0.075 parts by weight of hexanediol diacrylate (HDDA) and a silane coupling agent (trade name "KBM-403", Shin-Etsu Chemical Industry Co., Ltd. Co., Ltd.) 0.3 parts by we...

Embodiment 2

[0214] A double-sided PSA sheet (substrate-less PSA sheet) was produced in the same manner as in Example 1 except that the thickness of the PSA layer was 100 μm. The thickness of the double-sided adhesive sheet (thickness excluding the release liner) was 100 μm.

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Abstract

An optical pressure-sensitive adhesive sheet for silver nanowire layer use includes a pressure-sensitive adhesive layer. The optical pressure-sensitive adhesive sheet is characterized in that the amount of acrylic acid ions extracted from the pressure-sensitive adhesive layer with pure water at 100 DEG C for 45 minutes is equal to or less than 5 [mu]g per gram of the pressure-sensitive adhesive layer, where the amount is measured by ion chromatography. The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer.

Description

technical field [0001] The present invention relates to an optical pressure-sensitive adhesive sheet. More specifically, it relates to an optical adhesive sheet used for a silver nanowire layer. Background technique [0002] In recent years, display devices such as liquid crystal displays (LCDs) and input devices such as touch panels used in combination with such display devices have been widely used in various fields. In these display devices, input devices, etc., the adhesive sheet which has an adhesive layer is used for the use of bonding an optical member. For example, a transparent pressure-sensitive adhesive sheet is used for bonding a touch panel and various display members or optical members (see, for example, Patent Documents 1 to 3). [0003] In the optical member used for the said display device, an input device, etc., there is concern about deterioration by ultraviolet rays. Therefore, ultraviolet absorbing properties (ultraviolet resistance, UV resistance) ma...

Claims

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Application Information

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IPC IPC(8): C09J4/02C09J4/06C09J133/08C09J7/02
CPCC09J4/06C09J7/255C09J133/08C09J2433/00C09J2203/326
Inventor 藤田雅人野中崇弘松田祥一友久宽
Owner NITTO DENKO CORP