KR102457646B1 - Adhesive composition for conductive member - Google Patents

Abstract

Provided is an adhesive composition for a conductive member that can prevent oxidative deterioration of an adherend when a conductive member such as an ITO film is pasted together even if the pressure-sensitive adhesive composition contains an acidic component such as a carboxyl group. In the pressure-sensitive adhesive composition containing a (meth)acrylic copolymer having a mass average molecular weight of 100,000 to 1.5 million, the (meth)acrylic copolymer contains (meth)acrylate or vinyl monomer containing a carboxyl group in an amount of 1.2% by mass to 15% by mass It is a copolymer consisting of a composition containing mass%, and the conductive member characterized in that it contains 1×10 ⁻⁴ to 8×10 ⁻¹ parts by mass of a phosphorous acid ester compound with respect to 100 parts by mass of the (meth)acrylic copolymer. A pressure-sensitive adhesive composition is proposed.

Description

Adhesive composition for conductive member

The present invention uses an image display panel such as a plasma display (PDP), a liquid crystal display (LED), an organic EL display (OLED), an inorganic EL display, an electrophoretic display (EPD), an interference modulation display (IMOD), for example. In an image display apparatus, a tin-doped indium oxide (referred to as "ITO") film or an indium gallium-zinc composite oxide (referred to as "IGZO") film, etc., to an adhesive composition for a conductive member suitable for bonding a conductive member it's about

Image display devices such as personal computers, mobile terminals (PDA), game machines, televisions (TVs), car navigation systems, touch panels, and pen tablets, for example, plasma displays (PDPs), liquid crystal displays (LEDs), organic EL displays (OLEDs) ), an inorganic EL display, an electrophoretic display (EPD), an interference modulation display (IMOD), etc., in an image display device using an image display panel having a flat or curved surface, in order to secure visibility or prevent damage, Without providing a space|gap, it is performed by bonding and integrating each component material with an adhesive sheet or a liquid adhesive.

For example, in an image display device having a configuration in which a touch panel is interposed between the viewing side of the liquid crystal module and the surface protection panel, an adhesive sheet or a liquid adhesive is disposed between the surface protection panel and the viewing side of the liquid crystal module Thus, a touch panel and other constituent members, for example, a touch panel and a liquid crystal module, and a touch panel and a surface protection panel are laminated and integrated.

A touch panel is normally equipped with the upper electrode plate and lower electrode plate which have a transparent conductive film formed from metal oxides, such as ITO and IGZO. These metal oxide films are highly corrosive, and are corroded by outgas of the adhesive material or acidic components derived from eluted components under high temperature or moist heat environment, and in some cases, there is a fear that the electrode is disconnected.

However, when determining the composition or preparation method of the pressure-sensitive adhesive sheet or liquid pressure-sensitive adhesive, in order to impart basic physical properties as an adhesive material such as adhesion and cohesive strength, it is generally carried out to introduce a high polar component such as a carboxyl group as a copolymer component or additive. . However, since such a highly polar component has an oxidizing action, the pressure-sensitive adhesive sheet may cause oxidative deterioration or the like of an adherend under an environment such as high temperature and high humidity or due to long-term storage. The oxidative deterioration of such an adherend needs to be particularly taken into consideration when a conductive member having a portion made of a conductive member such as an ITO film or an IGZO film is pasted together.

Then, in view of such a problem, the proposal of suppressing the oxidative deterioration of a to-be-adhered body by not introduce|transducing acidic components, such as a carboxyl group, into an adhesive composition is proposed. For example, in Patent Document 1 and the like, an acryl-based polymer having a mass average molecular weight of 400,000 to 1.6 million composed of an alkoxyalkyl acrylate (component A) and an acrylic monomer having a hydroxyl group (component B) as essential monomer components. This is disclosed.

In addition, in Patent Document 2, by blending a specific acrylic polymer and a specific amine compound having polarity, based on the fact that corrosion deterioration of the adherend can be effectively suppressed, polymerization or copolymerization using (meth)acrylic acid ester as a monomer is performed. The acrylic polymer comprising the formula (1)...CH ₂ =CH(R ₁ )-XN(R ₂ )(R ₃ ) (wherein R ₁ is hydrogen or a methyl group, R ₂ and R ₃ are each independently hydrogen or a hydrocarbon group having 1 to 6 carbon atoms, and X is C(=O)(R ₄ ), O(R ₄ ), COO(R ₄ ), OCO(R ₄ ), CONH(R ₄ ), C(= O), O, COO, any one of OCO and CONH, wherein R ₄ is a hydrocarbon group having 1 to 6 carbon atoms) has been disclosed.

Japanese Patent Laid-Open No. 2010-215923 Japanese Patent Laid-Open No. 2012-246407

As disclosed in Patent Document 1, when an acidic component such as a carboxyl group is not introduced into the pressure-sensitive adhesive composition, the adhesive property is lowered or optical properties such as transparency are lowered, so that an acidic component such as a carboxyl group is contained. It was difficult to maintain the characteristic of the conventional adhesive composition.

From there, the present invention provides a novel, excellent oxidation resistance capable of preventing oxidative deterioration of an adherend when a conductive member such as an ITO film is pasted together even if the pressure-sensitive adhesive composition contains an acidic component such as a carboxyl group. To provide a pressure-sensitive adhesive composition for a conductive member.

The present invention, in the pressure-sensitive adhesive composition containing a (meth)acrylic copolymer having a mass average molecular weight of 100,000 to 1.5 million, the (meth)acrylic copolymer is a (meth)acrylate or vinyl monomer containing a carboxyl group of 1.2 It is a copolymer which consists of a composition containing mass % - 15 mass %, Comprising: 1x10 ^{-4 -} 8x10 ^-1 mass part of a phosphorous acid ester compound is included with respect to 100 mass parts of said (meth)acrylic-type copolymers. A pressure-sensitive adhesive composition for a conductive member is proposed.

The pressure-sensitive adhesive composition for a conductive member proposed by the present invention contains 1.2% by mass to 15% by mass of a predetermined (meth)acrylic copolymer as a base resin, that is, a (meth)acrylate or vinyl monomer containing a carboxyl group (meth) By including a predetermined amount of the phosphorous acid ester compound in the acrylic copolymer, even if the pressure-sensitive adhesive composition contains an acidic component such as a carboxyl group, oxidative deterioration of the conductive member as an adherend can be prevented, and a surprising corrosion inhibitory effect can be obtained. can perform Therefore, the pressure-sensitive adhesive composition for a conductive member proposed by the present invention can be used as a suitable pressure-sensitive adhesive composition for bonding various conductive members.

1 is a view for explaining the evaluation test method of corrosion resistance reliability performed in the embodiment to be described later, (A) is a top view of the ITO pattern of the ITO glass substrate for corrosion resistance reliability evaluation, (B) is, The top view which shows the state which coat|covered the adhesive sheet on the ITO glass substrate for corrosion-resistant reliability evaluation, (C) is sectional drawing of the sample for corrosion-resistant reliability evaluation.

Next, it demonstrates based on the example for implementing this invention. However, the present invention is not limited to the embodiments described below.

<This pressure-sensitive adhesive composition>

The pressure-sensitive adhesive composition according to the present embodiment (hereinafter, referred to as "the present pressure-sensitive adhesive composition") is a (meth)acrylic copolymer, a phosphorous acid ester compound, a crosslinking agent as needed, a crosslinking initiator as needed, and optionally It is an adhesive composition which further contains other materials according to it.

(phosphorous acid ester compound)

Since the phosphorous acid ester compound itself does not have corrosive properties and can stabilize acid components such as carboxyl groups, a predetermined amount of the phosphorous acid ester compound is added to the present pressure-sensitive adhesive composition using a predetermined (meth)acrylic copolymer as the base resin. By mixing , even if the present pressure-sensitive adhesive composition contains an acid component, oxidative deterioration of the conductive member as an adherend can be prevented. can do.

It is preferable that the phosphorous acid ester compound which this adhesive composition contains is a phosphorous acid ester compound represented by following formula (1).

Formula (1) ... P[-OR] ₃ (In the formula, R is a hydrocarbon such as a substituted or unsubstituted aromatic, alicyclic, and alkyl group. A plurality of R may be the same or different from each other, and a plurality of adjacent Rs are They may combine to form a saturated or unsaturated ring structure.)

Moreover, the compound containing two or more structural units represented by said Formula (1) may be sufficient.

As a result of mixing and testing various phosphorous acid ester compounds represented by the above formula (1) in a pressure-sensitive adhesive composition having a predetermined (meth)acrylic copolymer as the base resin, it was confirmed that any phosphorous acid ester compound exhibits an oxidative deterioration preventing effect. .

Among them, examples of the phosphorous acid ester compound contained in the pressure-sensitive adhesive composition include triphenyl phosphite, trisnonylphenyl phosphite, tricrezyl phosphite, tristearyl phosphite, triethyl phosphite, tris(2-ethylhexyl phosphite), Tridecyl phosphite, trilauryl phosphite, tris(tridecyl) phosphite, trioleyl phosphite, diphenyl diphenyl phosphite (2-ethylhexyl), diphenyl monodecyl phosphite, diphenyl monodecyl phosphite (tridecyl), tetraphenyldipropylene Dipropylene glycol diphosphite, tetraphenyl (tetratridecyl) pentaerythritol tetraphosphite, tetra (C12 to C15 alkyl) -4,4-isopropylidenediphenyl diphosphite, tris (2,4-di-t-phosphorous acid) butylphenyl), tris(4-nonylphenyl)phosphite, 3,9-bis(nonylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(4-nonylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(decyloxy)- 2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(tridecyloxy)-2,4,8,10-tetraoxa-3 ,9-diphosphaspiro[5,5]undecane, 3,9-bis(stearyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane , 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 3,9-bis {2,4-bis(1-methyl-1-phenylethyl)phenoxy}-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, 2,2' -Methylenebis(4,6-di-tert-butyl-1-phenyloxy)phosphite, 4,4'-isopropylidenediphenol C12-15 alcohol phosphite, distearylpentaerythritol diphosphite, 2,4 ,8,10-tetrakis(1,1-dimethylethyl)-6-{(2-ethylhexyl)oxy}-12H-dibenzo[d,g][1,3,2]dioxaphosphosine, 2 ,4,8,10-tetrakis(1,1-dimethylethyl)-6-(tridecyloxy)-12H-dibene crude [d,g][1,3,2]dioxaphosphosine, 1,1'-biphenyl-4,4'-diylbis[phosphorous acid bis(2,4-di-t-butylphenyl)]; Hydrogenated bisphenol A/pentaerythritol phosphite polymer, hydrogenated bisphenol A phosphite polymer, diethyl phosphite, bis(2-ethylhexyl) phosphite, dilauryl phosphite, dioleyl phosphite, diphenyl phosphite, etc. are particularly preferable.

Among them, when considering the physical properties of the phosphorous acid ester compound contained in the present pressure-sensitive adhesive composition, for example, considering compatibility with the acrylic resin composition, an aliphatic phosphorous acid ester (for example, the phosphorous acid ester compound of Example 2) Tridecyl phosphite or 3,9-bis(decyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane of Example 3) is preferable. Further, in consideration of hydrolysis resistance, aromatic phosphite (for example, tris(2,4-di-t-butylphenyl) phosphite as the phosphite compound of Example 1) is preferable. Moreover, when the balance of solubility and hydrolysis resistance is considered, the compound which has both an aliphatic ester group, such as diphenyl mono(tridecyl) phosphorous acid and an aromatic ester group is preferable.

In the present pressure-sensitive adhesive composition, the content ratio of the phosphorous acid ester compound is 100 (meth)acrylic copolymer as a base resin from the viewpoint of more effectively suppressing oxidative deterioration of conductive members such as ITO film without impairing adhesion performance. It is preferable to contain the phosphorous acid ester compound in the ratio of 0.0001 (1x10 ^-4 ) to 0.8 (8x10 ^-1 ) mass parts with respect to mass part, Especially, 0.0005 mass part or more or 0.7 mass part or less, especially, It is more preferable to contain in the ratio of 0.001 mass part or more or 0.6 mass part or less.

((meth)acrylic copolymer)

In the present pressure-sensitive adhesive composition, the (meth)acrylic copolymer as the base resin contains a straight-chain or branched alkyl (meth)acrylate having 4 to 18 carbon atoms in the side chain, and a (meth)acrylate or vinyl monomer containing a carboxyl group. A copolymer consisting of a composition comprising copolymers are mentioned.

At this time, as a C4-C18 linear or branched alkyl (meth)acrylate of a side chain, for example, n-butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, t-Butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, neopentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, heptyl (meth) ) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, t-butylcyclo Hexyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate ) acrylate, cetyl (meth) acrylate, stearyl (meth) acrylate, isostearyl (meth) acrylate, isobornyl (meth) acrylate, 3,5,5-trimethylcyclohexane (meth) acrylic a rate, dicyclopentanyl (meth)acrylate, dicyclopentenyl (meth)acrylate, dicyclopentenyloxyethyl (meth)acrylate, etc. are mentioned. You may use these 1 type or in combination of 2 or more type.

It is preferable to contain 30 mass parts or more and 90 mass parts or less of a C4-C18 linear or branched alkyl (meth)acrylate of a side chain with respect to 100 mass parts of copolymers, Especially 35 mass parts or more or 88 mass parts. It is more preferable to contain especially 40 mass parts or more or 85 mass parts or less of parts or less.

The (meth)acrylate or vinyl monomer containing a carboxyl group is, with respect to 100 parts by mass of the copolymer, 1.2 parts by mass or more and 15 parts by mass or less, 1.5 parts by mass or more or 10 parts by mass or less from the viewpoint of obtaining excellent adhesive properties, Especially, it is preferable to contain 2 mass parts or more or 8 mass parts or less especially.

On the other hand, the (meth)acrylate or vinyl monomer containing a hydroxyl group is preferably contained in an amount of 0 parts by mass or more or 30 parts by mass or less with respect to 100 parts by mass of the copolymer, and among them, 0 parts by mass or more or 25 parts by mass or less, the It is still more preferable to contain especially 0 mass parts or more or 20 mass parts or less among them.

Moreover, it is preferable to contain 0 mass parts or more and 70 mass parts or less of (meth)acrylate or vinyl monomer of C1-C3 of a side chain with respect to 100 mass parts of copolymers, Especially, it is 3 mass parts or more or 65 mass parts. It is more preferable to contain 5 parts by mass or more or 60 parts by mass or less in particular.

In addition to those mentioned above, acid anhydride group-containing monomers such as maleic anhydride and itaconic anhydride, epoxy groups such as glycidyl (meth)acrylate, glycidyl α-ethylacrylate, and 3,4-epoxybutyl (meth)acrylate Amino group-containing (meth)acrylic acid ester monomers such as dimethylaminoethyl (meth)acrylate and diethylaminoethyl (meth)acrylate, (meth)acrylamide, N-t-butyl (meth)acrylamide, N- A monomer containing an amide group, such as methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, diacetone (meth) acrylamide, maleic acid amide, maleimide, etc. Heterocyclic basic monomers such as , vinylpyrrolidone, vinylpyridine, and vinylcarbazole, styrene, t-butylstyrene, α-methylstyrene, vinyltoluene, acrylonitrile, methacrylonitrile, vinyl acetate, propionic acid Various vinyl monomers, such as vinyl and an alkylvinyl ether, can also be used suitably as needed.

In addition, the "vinyl monomer" in this specification points out the monomer compound which has polymerizable 2 bond groups other than a (meth)acryloyl group.

Specific examples of the (meth)acrylic copolymer include 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, isostearyl (meth) acrylate, butyl (meth) acrylate, Monomer components (a), such as acrylate, ethyl (meth)acrylate, and methyl (meth)acrylate, (meth)acrylic acid which has a carboxyl group, 2-(meth)acryloyloxyethyl hexahydrophthalic acid, 2-( Meth) acryloyloxypropyl hexahydrophthalic acid, 2- (meth) acryloyloxyethyl phthalic acid, 2- (meth) acryloyloxypropyl phthalic acid, 2- (meth) acryloyloxyethyl maleic acid, 2- Monomer components, such as (meth)acryloyloxypropyl maleic acid, 2-(meth)acryloyloxyethyl succinic acid, 2-(meth)acryloyloxypropyl succinic acid, crotonic acid, fumaric acid, maleic acid, itaconic acid ( b), hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, glycerol (meth) acrylate, monomethyl maleate, Monomethyl conic acid, vinyl acetate, glycidyl (meth) acrylate, (meth) acrylamide, (meth) acrylonitrile, fluorinated (meth) acrylate, a monomer component (c) such as silicone (meth) acrylate The (meth)acrylic acid ester copolymer obtained by making it copolymerize is mentioned.

As the (meth)acrylic copolymer, a (meth)acrylic copolymer formed by copolymerizing acrylic acid, such as a (meth)acrylic copolymer, which is a copolymer of a monomer having a carboxyl group and a (meth)acrylic acid ester, is used. While it is rich in adhesive strength and can exhibit desirable physical properties as an adhesive, when applied to an adherend having a conductive member such as an ITO film under the influence of an acid component, the adherend may be oxidatively deteriorated and corroded. However, as mentioned above, in the case of this pressure-sensitive adhesive composition, since the phosphorous acid ester compound is contained, the problem of such corrosion is reduced.

The mass average molecular weight of the (meth)acrylic copolymer is preferably 100,000 to 1.5 million, especially 150,000 or more or 1.3 million or less, and particularly preferably 200,000 or more or 1.2 million or less.

When it is desired to obtain an adhesive composition having high cohesive force, the mass average molecular weight is 700,000 to 1.5 million, particularly 800,000 or more, or 1.3 million from the viewpoint of obtaining cohesive force by entanglement of molecular chains as much as the molecular weight of the base polymer is large. It is preferable that it is below. On the other hand, when it is desired to obtain an adhesive composition with high fluidity|liquidity and stress relaxation property, it is preferable that a mass average molecular weight is 100,000 to 700,000, especially 200,000 or more or 600,000 or less.

In addition, since it is difficult to use a base polymer having a large molecular weight when a solvent is not used when molding an adhesive sheet or the like, the (meth)acrylic copolymer has a mass average molecular weight of 100,000 to 700,000, particularly 200,000 or more. Or 600,000 or less, Especially, it is especially preferable that it is 250,000 or more or 500,000 or less.

(crosslinking agent, crosslinking initiator)

This adhesive composition may mix|blend a crosslinking agent and a crosslinking initiator as needed, and can also prepare it so that a (meth)acrylic-type copolymer may be bridge|crosslinked.

For example, when crosslinking the above (meth)acrylic acid ester (co)polymer, a crosslinking agent capable of chemical bonding with a reactive group such as a hydroxyl group or a carboxyl group introduced into the acrylic acid ester (co)polymer is added, and heating or curing is performed. A method of reacting, and a method of adding a reaction initiator such as a polyfunctional (meth)acrylate having two or more (meth)acryloyl groups as a crosslinking agent and a photocrosslinking initiator, and crosslinking by ultraviolet irradiation or the like. In addition, using a polyfunctional vinyl monomer having two or more vinyl groups other than a (meth)acryloyl group, and a reaction initiator such as a photoinitiator or a thermal polymerization initiator, a (meth)acrylic acid ester (co)polymer by light or heat irradiation, etc. It is also possible to cross-link

Among them, the crosslinking method by light irradiation such as ultraviolet rays is preferable from the viewpoint of maintaining high cohesive force and adhesive properties derived from polar components without reacting and consuming polar functional groups such as carboxyl groups in the pressure-sensitive adhesive composition.

Examples of the crosslinking agent include at least a (meth)acryloyl group, an epoxy group, an isocyanate group, a carboxyl group, a hydroxyl group, a carbodiimide group, an oxazoline group, an aziridine group, a vinyl group, an amino group, an imino group, and an amide group. The crosslinking agent which has 1 type of crosslinkable functional group is mentioned, You may use 1 type or in combination of 2 or more type. Further, the crosslinkable functional group may be protected by a deprotectable protecting group.

Moreover, when bridge|crosslinking by light irradiation, it is preferable to contain a photoinitiator. The radical generating mechanism by the photoinitiator is largely classified into two types: the α cleavage type that cleaves and decomposes its own single bond to generate a radical, and the hydrogen extraction type that generates radicals by excitation of hydrogen from a compound in the system. Among these, it is preferable to use a hydrogen extraction type photocrosslinking initiator.

As the hydrogen extraction type photocrosslinking initiator, either an intermolecular hydrogen extraction type photocrosslinking initiator or an intramolecular hydrogen extraction type photocrosslinking initiator may be used.

It is preferable to mix|blend 0.01-10 mass parts of content of a crosslinking agent with respect to 100 mass parts of said (meth)acrylic-type copolymers from a viewpoint of balancing softness|flexibility and cohesive force as an adhesive composition, and especially 0.05 mass part or more or 8 mass parts Part or less, especially, it is especially preferable that it is 0.1 mass part or more or 5 mass parts or less.

When using the organic type crosslinking agent which has a (meth)acryloyl group, it is preferable to further add a photoinitiator. This is because radicals are generated by irradiation with light and become the starting point of the polymerization reaction in the system.

The addition amount of the photoinitiator is not particularly limited, and generally 0.1 to 10 parts by mass, particularly 0.2 parts by mass or more or 5 parts by mass or less, especially 0.5 parts by mass or more with respect to 100 parts by mass of the (meth)acrylic copolymer. Or it is especially preferable to adjust in the ratio of 3 mass parts or less. However, in balance with other factors, you may exceed this range.

In addition to the above, an antioxidant may be added as needed. As the antioxidant, for example, 2,2'-methylenebis(4-methyl-6-t-butylphenol), hexamethylene glycol-bis(3,5-di-t-butyl-4-hydroxyhydrocinnamate) ), tetrakis [methylene (3,5-di-t-butyl-4-hydroxyhydrocinnamate)] methane, triethylene glycol-bis-3-(3-t-butyl-4-hydroxy-5- Methylphenyl)propionate, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxy-benzyl)benzene, n-octadecyl-3-(4 '-Hydroxy-3',5'-di-t-butylphenol)propionate, 4,4'-methylenebis(2,6-di-t-butylphenol), 4,4'-butylidene and hindered phenol-based antioxidants such as -bis-(6-t-butyl-3-methyl-phenol), and various antioxidants such as sulfur-based and amine-based antioxidants.

Moreover, you may contain suitably the well-known component mix|blended with a normal adhesive composition. For example, light stabilizer, ultraviolet absorber, polymerization inhibitor, anti-fogging agent, metal deactivator, rust inhibitor, anti-aging agent, moisture absorbent, foaming agent, defoaming agent, inorganic particles, viscosity modifier, tackifying resin, photosensitizer, fluorescence It is possible to suitably contain various additives, such as an agent, and a reaction catalyst (a tertiary amine type compound, a quaternary ammonium type compound, a tin laurate compound, etc.).

Although this adhesive composition can also be prepared using a solvent, it can also be prepared as a hot-melt-type adhesive composition which does not use a solvent.

When the hot-melt pressure-sensitive adhesive composition does not use a solvent, it can have a thickness more than that of the pressure-sensitive adhesive composition using a solvent, so that it can have a sufficient thickness to fill the voids between the constituent members of the image display device.

The molding method of the pressure-sensitive adhesive sheet is not particularly limited. For example, the molten pressure-sensitive adhesive composition can be molded into a sheet shape using coating, cast molding, rolling molding, or the like. After apply|coating the mixture of an adhesive composition and an organic solvent to a base material, you may shape|mold into a sheet shape using the method of removing a solvent.

<Features>

This pressure-sensitive adhesive composition has an effect of preventing oxidative deterioration. Therefore, the rate of change [((Ω/Ω ₀ )-1)×100] of the ITO resistance value measured by the following methods (1) to (2) can be less than 5%, especially less than 3%.

(1) An ITO glass substrate for evaluation in which an adhesive composition for a conductive member is formed in a sheet shape having a thickness of 150 µm to obtain an adhesive sheet, and an ITO wiring made of indium oxide (ITO) is formed on a glass substrate , the adhesive sheet is bonded to form ITO wiring with an adhesive sheet.

(2) Measure in advance the resistance value (Ω ₀ ) of the ITO wiring at room temperature in the ITO wiring with the adhesive sheet, and store the ITO wiring with the adhesive sheet for 800 hours under a 65° C. 90% RH environment, The resistance value (Ω) after the said storage of the ITO wiring in the said ITO wiring with an adhesive sheet is measured.

<Form of this pressure-sensitive adhesive composition>

The present pressure-sensitive adhesive composition may be in a liquid form, a gel form, or a paste form. Moreover, a sheet shape may be sufficient.

The adhesive sheet ("this adhesive sheet") obtained by forming this adhesive composition into a film can be manufactured as follows.

For example, the present pressure-sensitive adhesive composition is formed on the release-treated surface of a release film for processes such as release PET, to the desired thickness, and if necessary, heat or ultraviolet irradiation is performed to carry out a crosslinking reaction. can be obtained by

It is preferable that this adhesive sheet is optically transparent. That is, it is preferable that it is a transparent adhesive sheet. Here, "optically transparent" means that the total light transmittance is 80% or more, preferably 85% or more, and more preferably 90% or more.

Moreover, it is preferable that the thickness of this adhesive sheet is 10 micrometers - 500 micrometers, Especially, it is more preferable that they are 15 micrometers or more or 400 micrometers or less, Especially, it is still more preferable that they are especially 20 micrometers or more or 350 micrometers or less.

As described above, this PSA sheet can also be used as a PSA sheet laminate having a structure formed by laminating release films on both the front and back sides of the sheet.

<Use of this pressure-sensitive adhesive composition>

The pressure-sensitive adhesive composition is, for example, a personal computer, a mobile terminal (PDA), a game machine, a television (TV), a car navigation device, a touch panel, an image display device such as a pen tablet, for example, a plasma display (PDP), a liquid crystal display ( In an image display apparatus using an image display panel such as LED), organic EL display (OLED), inorganic EL display, electrophoretic display (EPD), and interference modulation display (IMOD), each constituent member, in particular, a conductive member, Among them, it is preferable for bonding a constituent member provided with a conductive member containing ITO (indium oxide). Among them, from the viewpoint of corrosion reliability that does not oxidatively deteriorate the adherend, it is particularly preferable for pasting a touch panel provided with an electrode that is prone to oxidative deterioration, such as a transparent conductive material such as an ITO film or an IGZO film.

For example, the transparent conductive laminate for touch panels using this adhesive sheet can be manufactured.

Specifically, in an image display device having a configuration in which a touch panel is interposed between the viewing side of the liquid crystal module and the surface protection panel, it is disposed between the surface protection panel and the viewing side of the liquid crystal module, the touch panel and other constituent members, for example, a touch panel and a liquid crystal module, and is particularly useful for bonding a touch panel and a surface protection panel. That is, it is preferable to arrange and install between the surface protection panel in an image display device and the visual recognition side of a liquid crystal module, and to use it in order to stick and integrate two members, In this case, Among the members, it is more preferable that at least one member is a touch panel.

Incidentally, an upper electrode plate and a lower electrode plate each having a transparent conductive film formed from a metal oxide such as ITO or IGZO are provided in a normal touch panel. These metal oxide films are highly corrosive, and are corroded by outgas of the adhesive material or acidic components derived from eluted components under high temperature or moist heat environment, and in some cases, there is a fear that the electrode is disconnected.

However, as described above, since this pressure-sensitive adhesive sheet has a reduced corrosive action, it is preferable to adhere one side of the PSA sheet in contact with the touch panel, and adhere it with another member at the other side.

As the surface protection panel, a synthetic resin plate made of polycarbonate-based resin, acrylic resin, alicyclic polyolefin-based resin, styrene-based resin, polyvinyl chloride-based resin, phenol-based resin, melamine-based resin, and epoxy-based resin, or a glass plate and the like.

For example, in an image display device having a configuration in which a touch panel is interposed between the viewing side of a liquid crystal module and a surface protection panel, the touch panel is bonded to another structural member using this adhesive sheet An image display device having a configuration (referred to as &quot;this image display device&quot;) can be configured.

As described above, since the present image display device has a configuration formed by attaching and integrating the present pressure-sensitive adhesive sheet with reduced corrosive action in contact with the touch panel, the transparent conductive film made of a metal oxide such as ITO or IGZO is the pressure-sensitive adhesive sheet It has the advantage that there is no fear of being corroded by the acidic component etc. originating in , so that the electrode is disconnected.

<Explanation of phrases, etc.>

In general, "sheet" refers to a product that is thin and flat in terms of the definition in JIS and whose thickness is small and flat compared to the length and width. It is a thin and flat product with an arbitrarily limited maximum thickness, and is usually supplied in the form of a roll (Japanese Industrial Standards JISK6900). However, the boundary between the sheet and the film is not clear, and there is no need to distinguish between the two in the context of the present invention. ' shall also include "film".

In addition, when expressing "panel", such as an image display panel, a protective panel, etc., it includes a plate body, a sheet, and a film.

In the present specification, when described as "X to Y" (X and Y are arbitrary numbers), unless otherwise stated, "preferably greater than X" or "preferably greater than X" or "preferably greater than X" or "preferably X or more and Y or less". It also includes the meaning of "it is usually smaller than Y".

In addition, when "X or more" (X is an arbitrary number), unless otherwise specified, includes the meaning of "preferably greater than X", and "Y or less" (Y is any number) , unless otherwise specified, also includes the meaning of "preferably smaller than Y".

<Example>

Hereinafter, it demonstrates in more detail by an Example and a comparative example. However, the present invention is not limited thereto.

[Example 1]

With respect to 1 kg of copolymer (A-1, mass average molecular weight 400,000) consisting of 76 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of vinyl acetate, and 4 parts by mass of acrylic acid, tris(2,4-phosphorous acid) as a phosphorous acid ester compound 5 g of di-t-butylphenyl) (B-1) ("Irgafos 168" by BASF Corporation), 20 g of 4-methylbenzophenone was added and mixed uniformly as a photoinitiator, and the adhesive composition (1) was obtained. The copolymer (A-1) was a copolymer containing 4 mass % of the (meth)acrylate or vinyl monomer containing a carboxyl group.

Next, a peeling-treated polyethylene terephthalate film (manufactured by Mitsubishi Resin Co., Ltd., Diafoil MRV, thickness 100 μm) and a peeling-treated polyethylene terephthalate film (Mitsubishi Resin Company, Diafoil MRQ, thickness 75 μm), the pressure-sensitive adhesive composition Through (1), it was shaped into a sheet shape using a laminator so that it might become 150 micrometers in thickness.

The pressure-sensitive adhesive composition (1) was cured by irradiating ultraviolet light to the pressure-sensitive adhesive composition (1) through the polyethylene terephthalate film subjected to the peeling treatment so that the light having a wavelength of 365 nm reached 2000 mJ/cm 2 , and the pressure-sensitive adhesive sheet (1) was created. .

[Example 2]

Tridecyl phosphite (B-2) as a phosphorous acid ester compound with respect to 1 kg of copolymer (A-2, mass average molecular weight 300,000) which consists of 81 mass parts of butyl acrylate, 15 mass parts of methyl methacrylate, and 4 mass parts of acrylic acid. (Adekastave 3010 manufactured by Adeka Corporation) 1 g, glycerin dimethacrylate (C-1) (Shin-Nakamura Chemical Company, NK Ester 701) 50 g as a crosslinking agent, Irgacure 184 (BASF Corporation) as a photoinitiator 10 g and 2 g of Irganox 1010 (manufactured by BASF) as an antioxidant were added and mixed uniformly to obtain a pressure-sensitive adhesive composition (2). The copolymer (A-2) was a copolymer containing 4 mass % of the (meth)acrylate or vinyl monomer containing a carboxyl group.

Next, the pressure-sensitive adhesive composition (2) is molded into a sheet shape to a thickness of 150 µm on a polyethylene terephthalate film (manufactured by Mitsubishi Resin Co., Ltd., Diafoil MRV, thickness 100 µm) subjected to peeling treatment, and then polyethylene terephthalate subjected to peeling treatment A phthalate film (manufactured by Mitsubishi Resin Co., Ltd., Diafoil MRQ, thickness: 75 µm) was coated. Through the polyethylene terephthalate film subjected to the peeling treatment, the pressure-sensitive adhesive composition was irradiated with ultraviolet rays so that light having a wavelength of 365 nm reached 1000 mJ/cm 2 , and cured to obtain the pressure-sensitive adhesive sheet (2).

[Example 3]

Phosphorous acid ester with respect to 1 kg of solid content of the ethyl acetate diluted solution of the acrylic copolymer (A-3, mass average molecular weight 500,000) which consists of 74 mass parts of butyl acrylate, 24 mass parts of 2-ethylhexyl acrylate, and 2 mass parts of acrylic acid. As a compound, 3,9-bis(decyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (B-3) ("JPE-10" manufactured by Johoku Chemical Corporation) '), 0.5 g of TETRAD-X(C-2) (manufactured by Mitsubishi Gas Chemicals) was added as an amine-based crosslinking agent, and mixed uniformly to prepare a pressure-sensitive adhesive composition (3). The copolymer (A-3) was a copolymer containing 2 mass % of the (meth)acrylate or vinyl monomer containing a carboxyl group.

Next, on a polyethylene terephthalate film (Mitsubishi Resins Co., Ltd., Diafoil MRV, thickness 100 µm) subjected to peeling treatment, the pressure-sensitive adhesive composition (3) is applied so that the thickness after drying becomes 50 µm, and then at 70°C for 5 minutes It dried and obtained the 50-micrometer-thick sheet-shaped adhesive composition. After laminating|stacking three layers of this and making it 150 micrometers in thickness, the polyethylene terephthalate film (Mitsubishi Resin Co., Ltd. make, Diafoil MRQ, thickness 75 micrometers) was coat|covered. This was cured at room temperature (23°C) for 7 days, the crosslinking agent was reacted, and the adhesive sheet 3 was created.

[Example 4]

With respect to 1 kg of solid content of a commercially available acrylic copolymer (A-4, mass average molecular weight 1.3 million) of a pressure-sensitive adhesive solution (Sokken Chemical Co., Ltd., SK Dyne 1882, solid content concentration of about 17%), tris(2) phosphorous acid as a phosphorous acid ester compound 0.7 g of ,4-di-t-butylphenyl) (B-1) ("Irgafos 168" manufactured by BASF), 1.85 g of L-45 (C-3) (manufactured by Soken Chemical Co., Ltd.) as an isocyanate-based crosslinking agent, and 0.5 g of E-5XM (C-4) (manufactured by Soken Chemical Co., Ltd.) as an epoxy-based crosslinking agent was added and mixed uniformly to prepare a pressure-sensitive adhesive composition (4). The copolymer (A-4) was a copolymer containing 3 +/- 1 mass % of the (meth)acrylate or vinyl monomer containing a carboxyl group.

Next, on a polyethylene terephthalate film (Mitsubishi Resin Co., Ltd., Diafoil MRV, thickness 100 µm) subjected to peeling treatment, the pressure-sensitive adhesive composition (4) is applied so that the thickness after drying becomes 50 µm, and then at 70°C for 5 minutes It dried and obtained the 50-micrometer-thick sheet-shaped adhesive composition. After laminating|stacking three layers of this and making it 150 micrometers in thickness, the polyethylene terephthalate film (Mitsubishi Resin Co., Ltd. make, Diafoil MRQ, thickness 75 micrometers) was coat|covered. This was cured at room temperature (23°C) for 7 days, the crosslinking agent was reacted, and the adhesive sheet 4 was created.

[Comparative Example 1]

The pressure-sensitive adhesive composition (5) and the pressure-sensitive adhesive sheet (5) were prepared in the same manner as in Example 1 except that the phosphorous acid ester compound (B-1) was not added.

[Comparative Example 2]

The adhesive composition (6) and the adhesive sheet (6) were created similarly to Example 2 except the compounding quantity of the phosphorous acid ester compound (B-2) ("adekastave 3010" made by Adeka Corporation) having been 10 g.

[Comparative Example 3]

In place of the phosphorous acid ester compound (B-1), a mixture (B-4) of octadecyl dihydrogen phosphate and bisoctadecyl phosphate (“adecastab AX-71” manufactured by ADEKA Corporation), which are phosphoric acid ester compounds, was used. Other than that, similarly to Example 1, the adhesive composition 7 and the adhesive sheet 7 were created.

[Comparative Example 4]

Glycerin dimethacrylate (C-1) (Shin-Nakamura Chemical) as a crosslinking agent to 1 kg of a copolymer (A-5, mass average molecular weight 700,000) comprising 70 parts by mass of 2-ethylhexyl acrylate and 30 parts by mass of vinyl acetate 10 g of Irgacure 184 as 50 g and a photoinitiator of NK ester 701) manufactured by the company, was added, it mixed uniformly, and the adhesive composition (8) was obtained.

The pressure-sensitive adhesive composition (8) was molded into a sheet shape to a thickness of 150 µm on a polyethylene terephthalate film (Mitsubishi Resin Co., Ltd., Diafoil MRV, thickness 100 µm) subjected to a peeling treatment, and then a polyethylene terephthalate film (Mitsubishi) The resin company make, dia foil MRQ, thickness 75 micrometers) was coat|covered. Through the polyethylene terephthalate film subjected to the peeling treatment, the pressure-sensitive adhesive composition was irradiated with ultraviolet rays so that the light having a wavelength of 365 nm reached 1000 mJ/cm 2 , and cured to obtain the pressure-sensitive adhesive sheet 8 .

[Comparative Example 5]

A sample was prepared with reference to the Examples of Japanese Patent Laid-Open No. 2013-18892. That is, a dilute ethyl acetate solution (A-6) of a copolymer comprising 60 parts by mass of methoxyethyl acrylate, 34 parts by mass of butyl acrylate, 4 parts by mass of 2-hydroxyethyl acrylate, and 2 parts by mass of dimethylaminoethyl acrylate (A-6) 3 g of trimethylolpropane adduct-type hexamethylene diisocyanate (C-5) was mixed with respect to 1 kg of solid content of 1 kg, and the adhesive composition (9) was obtained.

The obtained pressure-sensitive adhesive composition (9) is coated on a polyethylene terephthalate film (manufactured by Mitsubishi Resin Co., Ltd., Diafoil MRV, thickness 100 μm) subjected to peeling treatment so that the thickness after drying becomes 50 μm, and dried at 80° C. for 2 minutes to obtain a solvent was removed to form a pressure-sensitive adhesive layer. After laminating|stacking three layers of this and making it 150 micrometers in thickness, the polyethylene terephthalate film (Mitsubishi Resin Co., Ltd. make, Diafoil MRQ, thickness 75 micrometers) was coat|covered. It cured at 23 degreeC for 7 days, and the adhesive sheet 9 was created.

<Evaluation>

[adhesiveness]

With respect to the pressure-sensitive adhesive sheets produced in Examples and Comparative Examples, one release film was peeled off, and a polyethylene terephthalate film (manufactured by Toyobo Seki Corporation; trade name "Cosmoshine A4300", thickness 100 µm) as a backing film was roll-pressed with a hand roller. did. This was cut into the rectangular shape of 10 mm width x 100 mm length, and the adhesive surface which peeled and exposed the remaining peeling film was roll-sticked to soda-lime glass using the hand roller. After curing in the state for 24 hours, the adhesive sheet is peeled from the glass while pulling the backing film at an angle forming 180° at a peeling rate of 60 mm/min, the tensile strength is measured with a load cell, and the glass of the adhesive sheet The 180 ° peel strength was measured and shown in Table 1 as "glass adhesive force".

[Optical Reliability]

The release film on one side of the pressure-sensitive adhesive sheet prepared in Examples and Comparative Examples was peeled off, and a PET film (manufactured by Toyobo Seki Co., Ltd., Cosmoshine A4300, 100 µm) was affixed to the exposed surface with a hand roller. Next, after the said adhesive sheet was cut out to 50 mm x 80 mm, the remaining peeling film was peeled off, it affixed on the 0.5-mm-thick soda-lime glass with a hand roller, and the sample for optical reliability evaluation was created.

About the said sample for evaluation, the total light transmittance was measured according to JISK7361-1 using haze meter NDH5000 (made by a Nippon Denshoku Industries company).

In addition, the sample for evaluation was stored for 3 days under a moist heat condition of 65°C and 90% RH, taken out, and after 2 hours, a haze meter NDH5000 (manufactured by Nippon Denshoku Industries Co., Ltd.) was used for the sample for optical reliability evaluation, according to JIS K7136. The haze value was measured according to it, and it showed in Table 1 as "wet heat haze."

A haze value over 10 % "x (poor)" and haze value judged a thing which is 10 % or less as "(circle) (good)".

[Corrosion Resistance Reliability]

On a glass substrate (60 mm x 45 mm), a shuttle line of indium oxide (ITO) is formed so as to reciprocate 10.5 at a thickness of 15 to 20 nm, a line width of 70 µm, a line length of 46 mm, and a line spacing of 30 µm, and the shuttle line. An ITO pattern (length about 97 cm) was formed by forming a square of 2 mm in width and height made of ITO at both ends of the ITO glass substrate for evaluation of corrosion resistance reliability (refer to Fig. 1 (A)).

Peel off the release film on one side of the adhesive sheets 1 to 9 (thickness 150 µm) prepared in Examples and Comparative Examples, and apply a PET film (Toyobo Seki Co., Ltd., Cosmo Shine A4100, 125 µm) to the exposed surface with a hand roller. stuck Next, after the pressure-sensitive adhesive sheet is cut to 40 mm × 45 mm, the remaining release film is peeled off, and as shown in FIG. An adhesive sheet was affixed to the board|substrate with a hand roller, and the sample for corrosion-resistant reliability evaluation (ITO wiring with an adhesive sheet) was created (refer FIG. 1(C)).

The resistance value (Ω ₀ ) at room temperature of the ITO wiring in this sample for corrosion-resistant reliability evaluation (ITO wiring with an adhesive sheet) was measured beforehand.

On the other hand, the sample for evaluation of corrosion resistance (ITO wiring with an adhesive sheet) was stored for 800 hours at 65°C and 90% RH environment, and after storage, ITO in the sample for evaluation of corrosion resistance (ITO wiring with an adhesive sheet) The resistance value (Ω) of the wiring was measured.

Then, the ITO resistance value, that is, the change rate (%) of the resistance value between the wire ends [((Ω/Ω ₀ )-1)×100] was calculated and shown in Table 1 as "resistance value change".

The change rate of the resistance value judged the thing of 5 % or more as "x (poor)" and less than 5 % as "(circle) (good)".

[Review]

Since the adhesive compositions (1-4) obtained by Examples 1-4 contained the phosphorous acid ester compound while having the outstanding adhesive characteristic, it was excellent in corrosion-resistance reliability.

On the other hand, since Comparative Example 1 did not contain the phosphorous acid ester compound, it was inferior in corrosion resistance reliability.

In Comparative Example 2, since the phosphorous acid ester compound was added in an excessive amount, it resulted in impairing the corrosion resistance reliability on the contrary. Moreover, the optical reliability also tended to deteriorate slightly by adding a phosphorous acid ester compound excessively.

In Comparative Example 3, a phosphoric acid ester compound was added instead of the phosphorous acid ester compound. In this comparative example 3, the resistance value increase suppression effect of the ITO wiring similar to an Example was not acquired.

In Comparative Example 4, in order to ensure corrosion resistance reliability, a pressure-sensitive adhesive composition containing no polar group causing electrode corrosion was used instead of adding a phosphorous acid ester compound. By not having a polar group, corrosion-resistance reliability was acquired, but adhesive force and moist heat and whitening resistance were not acquired.

Although the comparative example 5 aimed at coexistence of corrosion resistance and heat-and-moisture whitening resistance with polar groups other than an acidic group, it came into the result inferior to an Example with adhesive force.

From the above Examples and the test results conducted by the present inventors so far, a (meth)acrylic copolymer containing 1.2% by mass to 15% by mass of a predetermined (meth)acrylic copolymer, that is, a (meth)acrylate or vinyl monomer containing a carboxyl group With respect to the copolymer, when the phosphorous acid ester compound is contained in a ratio of 1×10 ⁻⁴ to 8×10 ⁻¹ parts by mass with respect to 100 parts by mass of the (meth)acrylic copolymer, oxidative deterioration occurs even if the pressure-sensitive adhesive composition contains an acidic component. found that it can be prevented.

Moreover, as a phosphorous acid ester compound at this time, it was also found that a more preferable effect can be acquired if it is a phosphorous acid ester compound represented by following formula (1).

Formula (1) ... P [-OR] ₃ (R in the formula is a hydrocarbon such as a substituted or unsubstituted aromatic, alicyclic or alkyl group. A plurality of R may be the same or different from each other, and a plurality of adjacent Rs are They may combine to form a saturated or unsaturated ring structure.)

Claims (9)

In the pressure-sensitive adhesive composition containing a (meth)acrylic copolymer having a mass average molecular weight of 100,000 to 1.5 million,
The (meth)acrylic copolymer is a copolymer having a composition containing 1.2 to 15 mass% of (meth)acrylate or vinyl monomer containing a carboxyl group,
1×10 ^-4 to 8×10 ^-1 parts by mass of a phosphorous acid ester compound with respect to 100 parts by mass of the (meth)acrylic copolymer,
The phosphorous acid ester compound is an aromatic phosphorous acid ester compound and/or an alicyclic phosphorous acid ester compound. The pressure-sensitive adhesive composition for a conductive member. The method of claim 1,
The conductive member of the pressure-sensitive adhesive composition for a conductive member is a transparent conductive film comprising ITO (tin-doped indium oxide), the pressure-sensitive adhesive composition for a conductive member. The method of claim 1,
The (meth)acrylic copolymer is a (meth)acrylate or vinyl monomer containing 30 parts by mass or more and 90 parts by mass or less of a linear or branched alkyl (meth)acrylate having 4 to 18 carbon atoms in the side chain, and a carboxyl group. 1.2 parts by mass or more and 15 parts by mass or less, 0 parts by mass or more and 30 parts by mass or less of a (meth)acrylate or vinyl monomer containing a hydroxyl group, and a (meth)acrylate or vinyl monomer having 1 to 3 carbon atoms in the side chain It is a copolymer which consists of a composition containing 0 mass parts or more and 70 mass parts or less, The adhesive composition for conductive members characterized by the above-mentioned. The method of claim 1,
Based on 100 parts by mass of the (meth)acrylic copolymer, (meth)acryloyl group, epoxy group, isocyanate group, carboxyl group, hydroxyl group, carbodiimide group, oxazoline group, aziridine group, vinyl group, amino group, imino group and 0.01 to 10 parts by mass of a crosslinking agent having at least one functional group selected from an amide group. The method of claim 1,
An adhesive composition for a conductive member comprising 0.1 to 10 parts by mass of a photoinitiator with respect to 100 parts by mass of the (meth)acrylic copolymer. The method of claim 1,
A pressure-sensitive adhesive composition for a conductive member, characterized in that the rate of change [((Ω/Ω ₀ )-1)×100] of the ITO resistance value measured by the following method is less than 5%.
(1) The pressure-sensitive adhesive composition for a conductive member is formed into a sheet shape having a thickness of 150 µm to obtain an adhesive sheet, and an ITO wiring made of indium oxide (ITO) is formed on a glass substrate to form an ITO glass substrate for evaluation, the pressure-sensitive adhesive sheet are bonded together to create ITO wiring with an adhesive sheet.
(2) Measure in advance the resistance value (Ω ₀ ) of the ITO wiring at room temperature in the ITO wiring with the adhesive sheet, and store the ITO wiring with the adhesive sheet for 800 hours under a 65° C. 90% RH environment, The resistance value (Ω) after the said storage of the ITO wiring in the said ITO wiring with an adhesive sheet is measured. The adhesive sheet for electrically-conductive members of 10 micrometers - 500 micrometers in thickness which consists of the adhesive composition for electrically-conductive members in any one of Claims 1-6. An adhesive sheet laminate for a conductive member having a configuration in which a release film is laminated on both sides of the adhesive sheet for a conductive member according to claim 7, respectively. A transparent conductive laminate for a touch panel using the adhesive sheet for a conductive member according to claim 7 .

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