WO2021241074A1 - 光学部材用粘着テープ - Google Patents
光学部材用粘着テープ Download PDFInfo
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- WO2021241074A1 WO2021241074A1 PCT/JP2021/015910 JP2021015910W WO2021241074A1 WO 2021241074 A1 WO2021241074 A1 WO 2021241074A1 JP 2021015910 W JP2021015910 W JP 2021015910W WO 2021241074 A1 WO2021241074 A1 WO 2021241074A1
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- sensitive adhesive
- tape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Definitions
- the present invention relates to an adhesive tape for an optical member.
- the optical member protective tape and the holding tape are provided so that the release liner does not peel off between the optical member protecting tape and the holding tape. Strong adhesive strength between them is required.
- the holding tape is peeled off from the adhesive tape for the optical member attached to the adherend by peeling off the release liner, the tape for protecting the optical member and the holding tape are used so as not to damage the adherend. A weak adhesive force with the tape is required.
- An object of the present invention is an adhesive tape for an optical member having a release liner, an adhesive tape for protecting an optical member, and a holding tape in this order, and when the release liner is peeled off from the adhesive tape for the optical member, the optical A strong adhesive force can be exhibited between the optical member protective tape and the holding tape so that peeling does not occur between the member protecting tape and the holding tape, while the release liner is peeled off.
- the tape for protecting the optical member and the holding tape are placed so as not to damage the adherend. It is an object of the present invention to provide an adhesive tape for an optical member capable of exhibiting a weak adhesive force.
- the adhesive tape for an optical member is An adhesive tape (I) for protecting an optical member having an adhesive layer (1) on one surface of the base film (1) and a holding having an adhesive layer (2) on one surface of the base film (2).
- the tape (II) is directly laminated with the outermost surface of the adhesive tape (I) for protecting the optical member on the opposite side of the adhesive layer (1) and the adhesive layer (2), and the optical member is directly laminated.
- An adhesive tape for optical members, wherein the release liner (III) is directly laminated on the exposed surface of the adhesive layer (1) of the protective adhesive tape (I). Two or more of the optical member protective tapes (I) are laminated on one holding tape (II) in an arrangement having a gap.
- the pressure-sensitive adhesive layer (2) is composed of a radiation-curable pressure-sensitive adhesive that is cured by radiation.
- the adhesive force A of the pressure-sensitive adhesive layer (2) before being cured by radiation in an environment of a temperature of 23 ° C. and a humidity of 50% RH when the holding tape (II) is peeled off is 1 N / 25 mm or more.
- the adhesive force B when peeling off the holding tape (II) is 0.2 N / 25 mm or less.
- the holding tape (II) side of the adhesive tape for an optical member is attached to a glass plate with a double-sided adhesive tape so as not to be peeled off, and then the temperature is 23 ° C. and the humidity is 50% RH.
- the adhesive force C when peeling off the release liner (III) is smaller than the adhesive force A.
- the stick slip value in the displacement-force curve obtained when the adhesive force A is measured is 30% or less.
- the haze of the holding tape (II) is less than 10%.
- the pressure-sensitive adhesive composition forming the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) contains at least one selected from a (meth) acrylic resin and a urethane-based resin.
- the pressure-sensitive adhesive composition forming the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) contains a (meth) acrylic resin
- the pressure-sensitive adhesive composition is (i) (. Meta) A pressure-sensitive adhesive composition containing an acrylic resin (2a) and containing a compound having two or more radiopolymerizable functional groups, and (ii) one radiopolymerizable functional group in a part of a side chain. It is at least one selected from the pressure-sensitive adhesive composition containing the (meth) acrylic resin (2b) having the above.
- the (meth) acrylic resin (2a) contains 0% by weight to 50% by weight of a (meth) acrylic acid alkyl ester having an alkyl group having 8 or more carbon atoms in the side chain as an alkyl ester group. It is obtained by polymerizing a monomer composition containing%.
- the glass transition temperature calculated by the FOX formula of the (meth) acrylic resin is 260 K or less.
- the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) contains a photopolymerization initiator.
- an optical member adhesive tape having a release liner, an optical member protective adhesive tape, and a holding tape in this order
- the optical A strong adhesive force can be exhibited between the optical member protective tape and the holding tape so that peeling does not occur between the member protecting tape and the holding tape, while the release liner is peeled off.
- the holding tape is peeled off from the adhesive tape for the optical member attached to the adherend, the tape for protecting the optical member and the holding tape are placed so as not to damage the adherend. It is possible to provide an adhesive tape for an optical member capable of exhibiting a weak adhesive force.
- (meth) acrylic means at least one selected from the group consisting of acrylic and methacrylic
- (meth) acrylate means at least one selected from the group consisting of acrylate and methacrylate.
- (meth) acryloyl means at least one selected from the group consisting of acryloyl and methacryloyl.
- the adhesive tape for an optical member comprises an adhesive tape (I) for protecting an optical member having an adhesive layer (1) on one surface of the base film (1) and a base film (2).
- the holding tape (II) having the pressure-sensitive adhesive layer (2) on one surface is the outermost surface of the pressure-sensitive adhesive tape (I) for protecting the optical member on the opposite side of the pressure-sensitive adhesive layer (1), and the pressure-sensitive adhesive layer.
- Adhesive for optical members, which is directly laminated with (2) and the release liner (III) is directly laminated on the exposed surface of the adhesive layer (1) of the adhesive tape (I) for protecting the optical member. It is a tape, and two or more of the optical member protective tapes (I) are laminated on one holding tape (II) in an arrangement having a gap.
- the adhesive tape for an optical member is as described above, and more simply, a release liner (III), an adhesive layer (1), a base film (1), and an adhesive layer.
- 1) and the base film (1) are components of the adhesive tape (I) for protecting the optical member, and the adhesive layer (2) and the base film (2) are components of the holding tape (II).
- the outermost surface of the pressure-sensitive adhesive tape (I) for protecting the optical member on the opposite side of the pressure-sensitive adhesive layer (1) and the pressure-sensitive adhesive layer (2) are directly laminated to form the pressure-sensitive adhesive layer (1).
- the release liner (III) is directly laminated on the exposed surface, and two or more of the optical member protective tapes (I) are laminated on one holding tape (II) in an arrangement having a gap.
- each of the release liner (III), the pressure-sensitive adhesive layer (1), the base film (1), the pressure-sensitive adhesive layer (2), and the base film (2) It may be composed of only one layer, or may be composed of two or more layers.
- the adhesive tape for an optical member according to the embodiment of the present invention may have any suitable other layer as long as it has the above-mentioned configuration, as long as the effect of the present invention is not impaired.
- the other layer may be only one kind or two or more kinds.
- the total number of other layers may be only one layer or two or more layers. Examples of the other layer include an antistatic layer described later.
- the number of layers of the adhesive tape for optical members according to the embodiment of the present invention is preferably 3 to 8 layers, more preferably 3 to 6 layers, depending on the number of the above other layers. It is more preferably 3 to 5 layers, particularly preferably 3 to 4 layers, and most preferably 3 layers.
- the number of layers of the adhesive tape for optical members according to the embodiment of the present invention is preferably 5 to 10 layers, more preferably 5 to 8 layers, depending on the number of the above other layers. It is more preferably 5 to 7 layers, particularly preferably 5 to 6 layers, and most preferably 5 layers.
- the adhesive tape for optical members of the present invention is, as shown in FIG. 1, in the adhesive tape 1000 for optical members, the release liner (III) 30, the adhesive layer (1) 11, and the base film ( 1) 12, the pressure-sensitive adhesive layer (2) 21, and the base film (2) 22 are directly laminated in this order, and the pressure-sensitive adhesive layer (1) 11 and the base film (1) 12 are adhesive for protecting optical members.
- the tape (I) 100 is formed, the adhesive layer (2) 21 and the base film (2) 22 form a holding tape (II) 200, and one holding tape (II) 200 has two or more optical members.
- the protective tape (I) 100 is laminated in an arrangement having a gap L.
- the spacing L is preferably 0.1 mm to 5.0 mm, more preferably 0.2 mm to 3.0 mm, still more preferably 0.3 mm to 2.0 mm, and particularly preferably 0.5 mm to 0.5 mm. It is 1.5 mm, most preferably 0.7 mm to 1.5 mm.
- the release liner (III), the pressure-sensitive adhesive layer (1), the base film (1), the pressure-sensitive adhesive layer (2), and the base film (2) are respectively.
- the antistatic layer may be provided on at least one surface thereof.
- the adhesive tape (I) for protecting optical members may have an antistatic layer on at least one surface thereof.
- the holding tape (II) may have an antistatic layer on at least one surface thereof.
- the adhesive layer (1) may contain a conductive component.
- the conductive component may be only one kind or two or more kinds.
- the adhesive layer (2) may contain a conductive component.
- the conductive component may be only one kind or two or more kinds.
- the pressure-sensitive adhesive layer (2) is composed of a radiation-curable pressure-sensitive adhesive that is cured by radiation. The details of the pressure-sensitive adhesive layer (2) will be described later.
- the adhesive layer (2) before being cured by radiation is adhered when the holding tape (II) is peeled off in an environment of a temperature of 23 ° C. and a humidity of 50% RH.
- the force A is 1N / 25mm or more, preferably 1.2N / 25mm to 50N / 25mm, more preferably 1.5N / 25mm to 30N / 25mm, and even more preferably 2N / 25mm to 25N / 25mm. It is more preferably 2N / 25mm to 20N / 25mm, particularly preferably 2N / 25mm to 15N / 25mm, and most preferably 2N / 25mm to 10N / 25mm.
- the adhesive force B of the pressure-sensitive adhesive layer (2) when peeling off the holding tape (II) in an environment of a temperature of 23 ° C. and a humidity of 50% RH is 0.2 N / 25 mm or less, preferably 0. It is 2N / 25mm to 0.001N / 25mm, more preferably 0.2N / 25mm to 0.002N / 25mm, still more preferably 0.2 / 25mm to 0.005N / 25mm, and particularly preferably 0.
- the holding tape (II) side is attached to a glass plate with a double-sided adhesive tape so as not to be peeled off, and then the mold is released in an environment of a temperature of 23 ° C. and a humidity of 50% RH.
- the adhesive force C when peeling off the liner (III) is preferably smaller than the adhesive force A. Since the adhesive force C is smaller than the adhesive force A, when the release liner is peeled off from the adhesive tape for the optical member, the peeling between the optical member protective tape and the holding tape may be less likely to occur. ..
- the stick slip value in the displacement-force curve obtained at the time of measuring the adhesive force A is preferably 30% or less, more preferably 25% or less. It is more preferably 22% or less, and particularly preferably 20% or less.
- the stick slip value in the displacement-force curve obtained at the time of measuring the adhesive force A is the maximum value (A MAX ) and the minimum value (A MIN ) between the maximum of the initial force and the completion of the measurement.
- a MAX- A the maximum value
- a MIN the minimum value
- the adhesive force drops sharply immediately after a slight peeling in the deformation of the adhesive tape in all directions such as the bending direction.
- the ratio of the adhesive force A to the adhesive force B is preferably (adhesive force A / adhesive force B)> 10, and more preferably (the adhesive force B).
- the adhesive tape for an optical member according to the embodiment of the present invention has a total light transmittance of preferably 20% or more, more preferably 30% to 100%, still more preferably 50% to 100%, and particularly. It is preferably 83% to 100%, and most preferably 85% to 100%. The method for measuring the total light transmittance will be described later.
- the adhesive tape for an optical member according to the embodiment of the present invention has a haze of preferably 20% or less, more preferably 0% to 20%, still more preferably 0% to 15%, and particularly preferably 0. % To 12%, most preferably 0% to 10%.
- the method for measuring the haze will be described later.
- the adhesive tape for optical members according to the embodiment of the present invention can be used for various purposes.
- the adhesive tape for an optical member according to the embodiment of the present invention is preferably for sticking to a foldable member or a rollable member in that the effect of the present invention can be utilized more effectively.
- a typical example of a foldable member or a rollable member is an OLED.
- the thickness of the release liner (III) is preferably 1 ⁇ m to 300 ⁇ m, more preferably 10 ⁇ m to 200 ⁇ m, still more preferably 20 ⁇ m to 150 ⁇ m, and particularly preferably 20 ⁇ m to 150 ⁇ m, in that the effect of the present invention can be more exhibited. It is preferably 35 ⁇ m to 100 ⁇ m, and most preferably 50 ⁇ m to 80 ⁇ m. If the thickness of the release liner (III) is too small compared to the above range, the curl suppressing effect may be reduced. If the thickness of the release liner (III) is too large compared to the above range, the adhesive tape for an optical member according to the embodiment of the present invention may easily float when bent.
- the release liner (III) contains a resin base film (IIIa).
- the resin base film (IIIa) examples include plastic films composed of polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); polyethylene (PE) and polypropylene (A plastic film composed of an olefin resin containing ⁇ -olefins such as PP), polymethylpentene (PMP), ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer (EVA) as monomer components; polyvinyl chloride.
- polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); polyethylene (PE) and polypropylene
- PE polyethylene
- PE polypropylene
- a plastic film composed of an olefin resin containing ⁇ -olefins such as PP), polymethylpentene (PMP), ethylene-propylene copolymer
- the resin base film (IIIa) may have only one layer or two or more layers.
- the resin base film (IIIa) may be a stretched one.
- the resin base film (IIIa) may be surface-treated.
- the surface treatment include corona treatment, plasma treatment, chromic acid treatment, ozone exposure, flame exposure, high-voltage impact exposure, ionizing radiation treatment, coating treatment with an undercoat agent, and the like.
- the resin base film (IIIa) may contain any suitable additive as long as the effect of the present invention is not impaired.
- the release liner (III) may have a release layer (IIIb) in order to enhance the releasability from the pressure-sensitive adhesive layer (1).
- a release layer (IIIb) typically the side of the release layer (IIIb) is directly laminated to the pressure-sensitive adhesive layer (1).
- any suitable forming material can be adopted as long as the effect of the present invention is not impaired.
- forming materials include silicone-based mold release agents, fluorine-based mold release agents, long-chain alkyl-based mold release agents, fatty acid amide-based mold release agents, and the like. Among these, a silicone-based mold release agent is preferable.
- the release layer (IIIb) can be formed as a coating layer.
- any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired.
- Such a thickness is preferably 10 nm to 2000 nm, more preferably 10 nm to 1500 nm, still more preferably 10 nm to 1000 nm, and particularly preferably 10 nm to 500 nm.
- the release layer (IIIb) may be only one layer or two or more layers.
- silicone-based release layer examples include an addition reaction type silicone resin.
- the addition reaction type silicone resin include KS-774, KS-775, KS-778, KS-779H, KS-847H, and KS-847T manufactured by Shin-Etsu Chemical Co., Ltd .; TPR-manufactured by Toshiba Silicone. 6700, TPR-6710, TPR-6721; SD7220, SD7226 manufactured by Toray Dow Corning; and the like.
- the coating amount (after drying) of the silicone-based release layer is preferably 0.01 g / m 2 to 2 g / m 2 , more preferably 0.01 g / m 2 to 1 g / m 2, and even more preferably 0.01 g / m 2 to 1 g / m 2. It is 0.01 g / m 2 to 0.5 g / m 2 .
- the release layer (IIIb) is formed, for example, by applying the above-mentioned forming material on any suitable layer by a conventionally known coating method such as reverse gravure coat, bar coat, die coat, etc., and then usually 120 to It can be carried out by curing by applying a heat treatment at about 200 ° C. Further, if necessary, heat treatment and activation energy ray irradiation such as ultraviolet irradiation may be used in combination.
- the release liner (III) may have an antistatic layer (IIIc).
- any appropriate thickness can be adopted as long as the effect of the present invention is not impaired.
- Such a thickness is preferably 1 nm to 1000 nm, more preferably 5 nm to 900 nm, still more preferably 7.5 nm to 800 nm, and particularly preferably 10 nm to 700 nm.
- the antistatic layer (IIIc) may be only one layer or two or more layers.
- any appropriate antistatic layer can be adopted as long as it can exert an antistatic effect, as long as the effect of the present invention is not impaired.
- Such an antistatic layer is preferably an antistatic layer formed by coating an arbitrary suitable base material layer with a conductive coating liquid containing a conductive polymer. Specifically, for example, it is an antistatic layer formed by coating a conductive coating liquid containing a conductive polymer on a resin base film (IIIa). Specific coating methods include a roll coating method, a bar coating method, and a gravure coating method.
- any suitable conductive polymer can be adopted as long as the effect of the present invention is not impaired.
- a conductive polymer include a conductive polymer obtained by doping a ⁇ -conjugated conductive polymer with a polyanion.
- the ⁇ -conjugated conductive polymer include chain conductive polymers such as polythiophene, polypyrrole, polyaniline, and polyacetylene.
- polyanion examples include polystyrene sulfonic acid, polyisoprene sulfonic acid, polyvinyl sulfonic acid, polyallyl sulfonic acid, ethyl acrylate sulfonic acid, polymethacrylic carboxylic acid and the like.
- the conductive polymer may be only one kind or two or more kinds.
- release liner (III) includes a resin base film (IIIa) and a release layer (IIIb) in this order.
- this embodiment comprises a resin substrate film (IIIa) and a release layer (IIIb).
- release liner (III) includes a resin base film (IIIa), an antistatic layer (IIIc) and a release layer (IIIb) in this order.
- this embodiment comprises a resin substrate film (IIIa), an antistatic layer (IIIc) and a release layer (IIIb).
- release liner (III) includes an antistatic layer (IIIc), a resin base film (IIIa), an antistatic layer (IIIc), and a release layer (IIIb) in this order.
- this embodiment comprises an antistatic layer (IIIc), a resin substrate film (IIIa), an antistatic layer (IIIc) and a release layer (IIIb).
- Adhesive layer (1) As the pressure-sensitive adhesive layer (1), any suitable pressure-sensitive adhesive layer may be adopted as long as the effects of the present invention are not impaired.
- the thickness of the pressure-sensitive adhesive layer (1) is preferably 0.5 ⁇ m to 150 ⁇ m, more preferably 1 ⁇ m to 100 ⁇ m, still more preferably 3 ⁇ m to 80 ⁇ m, in that the effect of the present invention can be more exhibited. It is particularly preferably 5 ⁇ m to 50 ⁇ m, and most preferably 5 ⁇ m to 30 ⁇ m.
- the pressure-sensitive adhesive layer (1) is preferably at least one selected from the group consisting of an acrylic pressure-sensitive adhesive (1), a urethane-based pressure-sensitive adhesive (1), a rubber-based pressure-sensitive adhesive (1), and a silicone-based pressure-sensitive adhesive (1). Consists of seeds.
- the pressure-sensitive adhesive layer (1) is more preferably an acrylic pressure-sensitive adhesive (1) in that the effects of the present invention can be more exhibited.
- the pressure-sensitive adhesive layer (1) can be formed by any suitable method. Examples of such a method include a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition (1), urethane-based pressure-sensitive adhesive composition (1), rubber-based pressure-sensitive adhesive composition (1), silicone-based pressure-sensitive adhesive composition). (At least one selected from the group consisting of (1)) is applied onto an arbitrary suitable base material (for example, base material film (1)), heated and dried as necessary, and cured as necessary. Then, a method of forming the pressure-sensitive adhesive layer on the base material can be mentioned.
- Examples of such an application method include a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, an air knife coater, a spray coater, a comma coater, a direct coater, and a roll brush coater. Method can be mentioned.
- the pressure-sensitive adhesive layer (1) may contain another component (1).
- the other component (1) may be only one kind or two or more kinds.
- any suitable other component may be adopted as long as the effect of the present invention is not impaired.
- examples of such other components (1) include other polymer components, cross-linking accelerators, cross-linking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, oil-soluble phenols, etc.).
- Anti-aging agents inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, UV absorbers, antioxidants, light stabilizers, chain transfer agents, plasticizers, softeners, Examples thereof include surfactants, conductive components, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat-resistant stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.
- a conductive component is typically mentioned.
- the conductive component may be only one kind or two or more kinds.
- any suitable conductive component can be adopted as long as the effect of the present invention is not impaired. Examples of such conductive components include ionic liquids, ionic conductive polymers, ionic conductive fillers, and electrically conductive polymers.
- Acrylic adhesive (1) is formed from the acrylic pressure-sensitive adhesive composition (1).
- the acrylic pressure-sensitive adhesive composition (1) contains a (meth) acrylic resin (1).
- the (meth) acrylic resin (1) may be of only one type or of two or more types.
- the content ratio of the (meth) acrylic resin (1) in the acrylic pressure-sensitive adhesive composition (1) is preferably 60% by weight to 99.9% by weight, more preferably 65% by weight in terms of solid content. It is 99.9% by weight, more preferably 70% by weight to 99.9% by weight, particularly preferably 75% by weight to 99.9% by weight, and most preferably 80% by weight to 99.9% by weight. %.
- any appropriate (meth) acrylic resin can be adopted as long as the effects of the present invention are not impaired.
- the weight average molecular weight of the (meth) acrylic resin (1) is preferably 300,000 to 2.5 million, more preferably 350,000 to 2 million, and even more preferably, in that the effects of the present invention can be more exhibited. Is 400,000 to 1.8 million, particularly preferably 500,000 to 1.5 million.
- the acrylic pressure-sensitive adhesive composition (1) may contain a cross-linking agent. By using a cross-linking agent, the cohesive force of the acrylic pressure-sensitive adhesive (1) can be improved, and the effect of the present invention can be further exhibited.
- the cross-linking agent may be only one kind or two or more kinds.
- the cross-linking agent examples include a polyfunctional isocyanate-based cross-linking agent, an epoxy-based cross-linking agent, a melamine-based cross-linking agent, a peroxide-based cross-linking agent, a urea-based cross-linking agent, a metal alkoxide-based cross-linking agent, a metal chelate-based cross-linking agent, and a metal salt.
- examples thereof include a system-based cross-linking agent, a carbodiimide-based cross-linking agent, an oxazoline-based cross-linking agent, an aziridine-based cross-linking agent, and an amine-based cross-linking agent.
- at least one selected from the group consisting of a polyfunctional isocyanate-based cross-linking agent and an epoxy-based cross-linking agent is preferable in that the effects of the present invention can be further exhibited.
- polyfunctional isocyanate-based cross-linking agent examples include lower aliphatic polyisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, and 1,6-hexamethylene diisocyanate; cyclopentylene diisocyanate, cyclohexylene diisocyanate, and the like.
- Alicyclic polyisocyanates such as isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate; 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, etc.
- Aromatic polyisocyanates and the like examples include trimethylolpropane / tolylene diisocyanate adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name “Coronate L”) and trimethylolpropane / hexamethylene diisocyanate adduct (Nippon Polyurethane Industry Co., Ltd.).
- epoxy-based cross-linking agent examples include N, N, N', N'-tetraglycidyl-m-xylene diamine, diglycidyl aniline, and 1,3-bis (N, N-diglycidylamino).
- any appropriate content can be adopted as long as the effect of the present invention is not impaired.
- a content is preferably 30 parts by weight or less with respect to the solid content (100 parts by weight) of the (meth) acrylic resin (1) in that the effect of the present invention can be more exhibited. It is more preferably 0.05 parts by weight to 20 parts by weight, further preferably 0.1 parts by weight to 18 parts by weight, particularly preferably 0.5 parts by weight to 15 parts by weight, and most preferably. It is 0.5 parts by weight to 10 parts by weight.
- the acrylic pressure-sensitive adhesive composition (1) may contain any suitable other component as long as the effect of the present invention is not impaired.
- suitable other components include polymer components other than the (meth) acrylic resin (1), cross-linking accelerators, cross-linking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, etc.). Oil-soluble phenols, etc.), anti-aging agents, inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, UV absorbers, antioxidants, light stabilizers, chain transfer agents, etc.
- plasticizers examples thereof include plasticizers, softeners, surfactants, antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat-resistant stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.
- the number of carbon atoms of the alkyl group of the (component a) alkyl ester moiety is preferably 1 to 12 in that the effect of the present invention can be more exhibited.
- the (meth) acrylic resin (A) preferably has 1 to 12 carbon atoms in the alkyl group of the alkyl ester moiety as the (component a) in that the effects of the present invention can be further exhibited (the component a).
- the acrylic resin (A) is more preferably a (meth) acrylic acid alkyl ester in which the alkyl group of the alkyl ester moiety has 1 to 8 carbon atoms as the (a component) and OH as the (b component).
- (meth) acrylic resin (A) formed by polymerization from the composition (A) containing acrylic acid without containing a (meth) acrylic acid ester having a group, and more preferably as (component a).
- the (a component) and (b component) may be independently one type or two or more types, respectively.
- Examples of the (meth) acrylic acid alkyl ester (component a) in which the alkyl group of the alkyl ester moiety has 1 to 12 carbon atoms include methyl (meth) acrylic acid, ethyl (meth) acrylic acid, and (meth) acrylic acid.
- n-propyl isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, (meth) acrylate Pentyl, (meth) hexyl acrylate, (meth) heptyl acrylate, (meth) octyl acrylate, (meth) 2-ethylhexyl acrylate, (meth) isooctyl acrylate, (meth) nonyl acrylate, (meth) acrylic Examples thereof include isononyl acid acid, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, and dodecyl (meth) acrylate.
- methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate are preferable in that the effects of the present invention can be further exhibited. More preferably, it is methyl acrylate, ethyl acrylate, n-butyl acrylate, or 2-ethylhexyl acrylate.
- At least one (b component) selected from the group consisting of (meth) acrylic acid ester having an OH group and (meth) acrylic acid for example, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and the like.
- examples thereof include (meth) acrylic acid ester having an OH group such as hydroxybutyl (meth) acrylic acid, and (meth) acrylic acid.
- hydroxyethyl (meth) acrylate and (meth) acrylic acid are preferable, and hydroxyethyl acrylate and acrylic acid are more preferable, in that the effects of the present invention can be more exhibited.
- the composition (A) may contain a copolymerizable monomer other than the component (a) and the component (b).
- the copolymerizable monomer may be only one kind or two or more kinds.
- Examples of such a copolymerizable monomer include (meth) acrylic acid alkyl esters in which the alkyl group of the alkyl ester moiety has 1 to 3 carbon atoms; itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, and the like.
- Carboxyl group-containing monomers such as these acid anhydrides (eg, acid anhydride group-containing monomers such as maleic anhydride, itaconic anhydride); (excluding (meth) acrylic acid); (meth) acrylamide, N, N.
- acid anhydrides eg, acid anhydride group-containing monomers such as maleic anhydride, itaconic anhydride
- acrylic acid excluding (meth) acrylic acid
- acrylamide N, N.
- -Amid group-containing monomers such as dimethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, N-hydroxyethyl (meth) acrylamide; (meth) ) Amino group-containing monomers such as aminoethyl acrylate, dimethylaminoethyl (meth) acrylate, t-butylaminoethyl (meth) acrylate; epoxy groups such as glycidyl (meth) acrylate and methyl glycidyl (meth) acrylate.
- Monomer-containing monomer such as acrylonitrile and methacrylonitrile; N-vinyl-2-pyrrolidone, (meth) acryloylmorpholine, N-vinylpiperidone, N-vinylpiperazine, N-vinylpyrrole, N-vinylimidazole, vinylpyridine , Vinyl pyrimidine, vinyl oxazole and other heterocyclic-containing vinyl monomers; sulfonic acid group-containing monomers such as sodium vinyl sulfonate; phosphate group-containing monomers such as 2-hydroxyethylacryloyl phosphate; and imides such as cyclohexyl maleimide and isopropyl maleimide.
- Group-containing monomer isocyanate group-containing monomer such as 2-methacryloyloxyethyl isocyanate; (meth) acrylic acid ester having an alicyclic hydrocarbon group such as cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, and isobornyl (meth) acrylate.
- (Meta) acrylic acid ester having an aromatic hydrocarbon group such as phenyl (meth) acrylate, phenoxyethyl (meth) acrylate, benzyl (meth) acrylate; vinyl ester such as vinyl acetate and vinyl propionate; styrene, vinyl toluene
- Aromatic vinyl compounds such as; olefins and dienes such as ethylene, butadiene, isoprene, isobutylene; vinyl ethers such as vinyl alkyl ether; vinyl chloride; and the like.
- a polyfunctional monomer can also be adopted.
- the polyfunctional monomer means a monomer having two or more ethylenically unsaturated groups in one molecule.
- any suitable ethylenically unsaturated group can be adopted as long as the effect of the present invention is not impaired.
- examples of such an ethylenically unsaturated group include radically polymerizable functional groups such as a vinyl group, a propenyl group, an isopropenyl group, a vinyl ether group (vinyloxy group) and an allyl ether group (allyloxy group).
- polyfunctional monomer examples include hexanediol di (meth) acrylate, butanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol.
- Examples thereof include (meth) acrylate, vinyl (meth) acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate.
- a polyfunctional monomer may be only one kind, or may be two or more kinds.
- (meth) acrylic acid alkoxyalkyl ester can also be adopted.
- the (meth) acrylate alkoxyalkyl ester include (meth) acrylate 2-methoxyethyl, (meth) acrylate 2-ethoxyethyl, (meth) acrylate methoxytriethylene glycol, and (meth) acrylate 3-. Examples thereof include methoxypropyl, 3-ethoxypropyl (meth) acrylate, 4-methoxybutyl (meth) acrylate, and 4-ethoxybutyl (meth) acrylate.
- the (meth) acrylic acid alkoxyalkyl ester may be only one kind or two or more kinds.
- the content of the (meth) acrylic acid alkyl ester (component a) in which the alkyl group of the alkyl ester moiety has 1 to 12 carbon atoms is a (meth) acrylic resin (meth) in that the effects of the present invention can be further exhibited.
- the total amount (100% by weight) of the monomer components constituting A) it is preferably 30% by weight or more, more preferably 35% by weight to 99% by weight, and further preferably 40% by weight to 98% by weight. It is more preferably 50% by weight to 98% by weight, further preferably 60% by weight to 98% by weight, further preferably 70% by weight to 98% by weight, still more preferably 80% by weight to 98% by weight. %, More preferably 90% by weight to 98% by weight, particularly preferably 92% by weight to 98% by weight, and most preferably 92% by weight to 95% by weight.
- the alkyl ester moiety in the total amount (100% by weight) of the (meth) acrylic acid alkyl ester (component a) having 1 to 12 carbon atoms in the alkyl group of the alkyl ester moiety can further exert the effect of the present invention.
- the content ratio of the (meth) acrylic acid alkyl ester in which the alkyl group has 2 to 12 carbon atoms is preferably 30% by weight.
- the above is more preferably 35% by weight to 100% by weight, further preferably 40% by weight to 100% by weight, still more preferably 45% by weight to 100% by weight, still more preferably 50% by weight to 50% by weight.
- % To 100% by weight, most preferably 95% by weight to 100% by weight.
- the content of at least one (b component) selected from the group consisting of (meth) acrylic acid ester having an OH group and (meth) acrylic acid is (meth) acrylic in that the effect of the present invention can be more exhibited. It is preferably 1% by weight or more, more preferably 1% by weight to 30% by weight, still more preferably 2% by weight to 20% by weight, based on the total amount (100% by weight) of the monomer components constituting the system resin (A). It is% by weight, more preferably 2% by weight to 15% by weight, particularly preferably 3% by weight to 10% by weight, and most preferably 3% by weight to 7% by weight.
- composition (A) may contain any suitable other components as long as the effects of the present invention are not impaired.
- suitable other components include polymerization initiators, chain transfer agents, solvents and the like.
- any appropriate content may be adopted as long as the effect of the present invention is not impaired.
- the polymerization initiator a thermal polymerization initiator, a photopolymerization initiator (photoinitiator), or the like can be adopted depending on the type of the polymerization reaction.
- the polymerization initiator may be only one kind or two or more kinds.
- the thermal polymerization initiator can be preferably used when the (meth) acrylic resin (A) is obtained by solution polymerization.
- a thermal polymerization initiator examples include an azo-based polymerization initiator, a peroxide-based polymerization initiator (for example, dibenzoyl peroxide, tert-butyl permalate, etc.), a redox-based polymerization initiator, and the like. ..
- the azo-based initiator disclosed in JP-A-2002-69411 is particularly preferable.
- Such an azo-based polymerization initiator is preferable in that the decomposition product of the polymerization initiator does not easily remain in the (meth) acrylic resin (A) as a portion that causes the generation of heat-generating gas (out gas).
- the azo-based polymerization initiator include 2,2'-azobisisobutyronitrile (hereinafter, may be referred to as AIBN) and 2,2'-azobis-2-methylbutyronitrile (hereinafter, referred to as AMBN). , 2,2'-azobis (2-methylpropionic acid) dimethyl, 4,4'-azobis-4-cyanovalerian acid and the like.
- the photopolymerization initiator can be preferably used when the (meth) acrylic resin (A) is obtained by active energy ray polymerization.
- the photopolymerization initiator include a benzoin ether-based photopolymerization initiator, an acetophenone-based photopolymerization initiator, an ⁇ -ketol-based photopolymerization initiator, an aromatic sulfonyl chloride-based photopolymerization initiator, and a photoactive oxime-based photopolymerization initiator.
- Examples thereof include agents, benzoin-based photopolymerization initiators, benzyl-based photopolymerization initiators, benzophenone-based photopolymerization initiators, ketal-based photopolymerization initiators, thioxanthone-based photopolymerization initiators, and the like.
- benzoin ether-based photopolymerization initiator examples include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethan-1-one, and anisole.
- examples include methyl ether.
- examples of the acetophenone-based photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenylketone, 4-phenoxydichloroacetophenone, and 4- (t-butyl). Examples include dichloroacetophenone.
- Examples of the ⁇ -ketol-based photopolymerization initiator include 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2-methylpropane-1-one, and the like. ..
- Examples of the aromatic sulfonyl chloride-based photopolymerization initiator include 2-naphthalene sulfonyl chloride and the like.
- Examples of the photoactive oxime-based photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime.
- Examples of the benzoin-based photopolymerization initiator include benzoin and the like.
- Examples of the benzyl-based photopolymerization initiator include benzyl and the like.
- Examples of the benzophenone-based photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, ⁇ -hydroxycyclohexylphenylketone and the like.
- Examples of the ketal-based photopolymerization initiator include benzyldimethyl ketal and the like.
- thioxanthone-based photopolymerization initiator examples include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone.
- a (meth) acrylic acid ester having a cyclic structure in the molecule is preferably contained as a monomer component in that the effects of the present invention can be more exhibited.
- the cyclic structure (ring) of the (meth) acrylic acid ester having a cyclic structure in the molecule (hereinafter, may be referred to as “ring-containing (meth) acrylic acid ester”) is an aromatic ring or a non-aromatic ring. It may be any of.
- the aromatic ring include an aromatic carbocycle (for example, a monocyclic carbocycle such as a benzene ring, a condensed carbocycle such as a naphthalene ring), and various aromatic heterocycles.
- non-aromatic ring examples include a non-aromatic alicyclic ring (non-aromatic alicyclic ring) (for example, a cycloalkane ring such as a cyclopentane ring, a cyclohexane ring, a cycloheptane ring, and a cyclooctane ring; Cycloalkene rings such as cyclohexene rings; etc.), non-aromatic bridging rings (eg, bicyclic hydrocarbon rings such as pinan, pinen, bornan, norbornane, norbornane; tricyclic or higher aliphatic hydrocarbons such as adamantan; Rings (bridged hydrocarbon rings, etc.), non-aromatic heterocycles (eg, epoxy rings, oxorane rings, oxetane rings, etc.), and the like.
- non-aromatic alicyclic ring for example, a cycloal
- Examples of the aliphatic hydrocarbon ring having three or more rings include a dicyclopentanyl group, a dicyclopentenyl group, an adamantyl group, a tricyclopentanyl group, and a tricyclopentenyl group. And so on.
- (meth) acrylic such as (meth) acrylic acid cyclopentyl, (meth) acrylic acid cyclohexyl, (meth) acrylic acid cycloheptyl, and (meth) acrylic acid cyclooctyl.
- Acid cycloalkyl ester (meth) acrylic acid ester having a bicyclic aliphatic hydrocarbon ring such as (meth) acrylate isobornyl; dicyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate , Tricyclopentanyl (meth) acrylate, 1-adamantyl (meth) acrylate, 2-methyl-2-adamantyl (meth) acrylate, 2-ethyl-2-adamantyl (meth) acrylate, etc.
- adamantyl (meth) acrylate 2-methyl-2-adamantyl (meth) acrylate
- 2-ethyl-2-adamantyl (meth) acrylate etc.
- (Meta) acrylic acid ester having a hydrogen ring (meth) acrylic acid aryl ester such as (meth) phenylacrylic acid, (meth) acrylic acid aryloxyalkyl ester such as (meth) phenoxyethyl acrylate, (meth) acrylic Examples thereof include (meth) acrylic acid esters having an aromatic ring such as (meth) acrylic acid arylalkyl esters such as benzyl acid acid.
- the ring-containing (meth) acrylic acid ester is preferably a non-aromatic ring-containing (meth) acrylic acid ester, and more preferably cyclohexylacrylic acid (CHA) or cyclohexyl methacrylate (CHMA).
- DCPA Dicyclopentanyl acrylate
- DCPMA dicyclopentanyl methacrylate
- DCPA dicyclopentanyl methacrylate
- DCPA dicyclopentanyl methacrylate
- DCPMA dicyclopentany
- the ring-containing (meth) acrylic acid ester may be one kind or two or more kinds.
- the content of the ring-containing (meth) acrylic acid ester is preferable with respect to the total amount (100% by weight) of the monomer components constituting the (meth) acrylic resin (B) in that the effect of the present invention can be more exhibited. Is 10% by weight or more, more preferably 20% by weight to 90% by weight, still more preferably 30% by weight to 80% by weight, and particularly preferably 40% by weight to 70% by weight.
- Examples of the (meth) acrylic acid alkyl ester having a linear or branched alkyl group include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, and isopropyl (meth) acrylate.
- Examples thereof include (meth) acrylic acid alkyl esters.
- the (meth) acrylic acid alkyl ester having a linear or branched alkyl group methyl methacrylate (MMA) and lauryl (meth) acrylic acid are preferable.
- the (meth) acrylic acid alkyl ester having a linear or branched alkyl group may be one kind or two or more kinds.
- the content of the (meth) acrylic acid alkyl ester having a linear or branched alkyl group is the total amount of the monomer components constituting the (meth) acrylic resin (B) in that the effect of the present invention can be further exhibited.
- (100% by weight) it is preferably 10% by weight or more, more preferably 20% by weight to 90% by weight, still more preferably 25% by weight to 80% by weight, and particularly preferably 30% by weight. It is about 70% by weight, and most preferably 30% by weight to 60% by weight.
- the composition (B) may contain a copolymerizable monomer other than the ring-containing (meth) acrylic acid ester and the (meth) acrylic acid alkyl ester having a linear or branched alkyl group.
- the copolymerizable monomer may be only one kind or two or more kinds. Examples of such copolymerizable monomers include 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, methoxytriethylene glycol (meth) acrylate, and 3-methoxy (meth) acrylate.
- (Meta) acrylic acid alkoxyalkyl esters such as propyl, 3-ethoxypropyl (meth) acrylic acid, 4-methoxybutyl (meth) acrylic acid, 4-ethoxybutyl (meth) acrylic acid; 2-hydroxy (meth) acrylic acid Ethyl, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxy (meth) acrylate Hydroxyl group (hydroxyl) -containing monomers such as hexyl, vinyl alcohol, and allyl alcohol; (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N -Amid group-containing monomers such as butoxymethyl (meth) acrylamide and N-hydroxyethyl (meth) acrylamide;
- Amino group-containing monomers such as acrylonitrile, methacrylnitrile and the like; sulfonic acid group-containing monomers such as sodium vinylsulfonate; phosphate group-containing monomers such as 2-hydroxyethylacryloyl phosphate; 2-methacryloyloxy. Examples thereof include isocyanate group-containing monomers such as ethyl isocyanate; and imide group-containing monomers such as cyclohexylmaleimide and isopropylmaleimide;
- a polyfunctional monomer can also be adopted.
- the polyfunctional monomer means a monomer having two or more ethylenically unsaturated groups in one molecule.
- any suitable ethylenically unsaturated group can be adopted as long as the effect of the present invention is not impaired.
- examples of such an ethylenically unsaturated group include radically polymerizable functional groups such as a vinyl group, a propenyl group, an isopropenyl group, a vinyl ether group (vinyloxy group) and an allyl ether group (allyloxy group).
- polyfunctional monomer examples include hexanediol di (meth) acrylate, butanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol.
- Examples thereof include (meth) acrylate, vinyl (meth) acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate.
- a polyfunctional monomer may be only one kind, or may be two or more kinds.
- composition (B) may contain any suitable other components as long as the effects of the present invention are not impaired.
- suitable other components include polymerization initiators, chain transfer agents, solvents and the like.
- any appropriate content may be adopted as long as the effect of the present invention is not impaired.
- the polymerization initiator a thermal polymerization initiator, a photopolymerization initiator (photoinitiator), or the like can be adopted depending on the type of the polymerization reaction.
- the polymerization initiator may be only one kind or two or more kinds.
- thermal polymerization initiator and photopolymerization initiator [A-2-1-1.
- photoinitiator [A-2-1-1.
- the description in the section of the preferred embodiment 1] of the (meth) acrylic resin (1) can be incorporated.
- the urethane-based pressure-sensitive adhesive (1) As the urethane-based pressure-sensitive adhesive (1), any suitable urethane-based pressure-sensitive adhesive such as a known urethane-based pressure-sensitive adhesive described in JP-A-2017-039859 can be used as long as the effect of the present invention is not impaired. Can be adopted.
- the urethane-based pressure-sensitive adhesive (1) is, for example, a urethane-based pressure-sensitive adhesive formed from a urethane-based pressure-sensitive adhesive composition, wherein the urethane-based pressure-sensitive adhesive composition is a group consisting of a urethane prepolymer and a polyol. It contains at least one selected from the above and a cross-linking agent.
- the urethane-based pressure-sensitive adhesive (1) may be of only one type or of two or more types.
- the urethane-based pressure-sensitive adhesive (1) may contain any suitable component as long as the effect of the present invention is not impaired.
- Rubber adhesive (1) As the rubber-based pressure-sensitive adhesive (1), any suitable rubber-based pressure-sensitive adhesive such as a known rubber-based pressure-sensitive adhesive described in JP-A-2015-074771 can be used as long as the effect of the present invention is not impaired. Can be adopted.
- the rubber-based pressure-sensitive adhesive (1) may be of only one type or may be two or more types.
- the rubber-based pressure-sensitive adhesive (1) may contain any suitable component as long as the effect of the present invention is not impaired.
- silicone-based pressure-sensitive adhesive (1) any suitable silicone-based pressure-sensitive adhesive such as a known silicone-based pressure-sensitive adhesive described in JP-A-2014-047280 can be used as long as the effect of the present invention is not impaired. Can be adopted.
- the silicone-based pressure-sensitive adhesive (1) may be of only one type or of two or more types.
- the silicone-based pressure-sensitive adhesive (1) may contain any suitable component as long as the effect of the present invention is not impaired.
- any appropriate thickness may be adopted depending on the intended purpose as long as the effect of the present invention is not impaired.
- Such a thickness is preferably 20 ⁇ m to 500 ⁇ m, more preferably 20 ⁇ m to 300 ⁇ m, still more preferably 20 ⁇ m to 200 ⁇ m, and particularly preferably 20 ⁇ m to 20 ⁇ m in that the effects of the present invention can be more exhibited. It is 100 ⁇ m, most preferably 20 ⁇ m to 80 ⁇ m.
- the base film (1) includes a resin base film (1a).
- the base film (1) may have a conductive layer (1b).
- the conductive layer (1b) can be arranged, for example, between the pressure-sensitive adhesive layer (1) and the resin base film (1a).
- the conductive layer (1b) may be only one layer or two or more layers.
- the conductive layer (1b) can be provided by forming it on any suitable substrate.
- a resin base material film (1a) is preferable.
- the conductive layer (1b) is formed by any suitable thin film forming method such as a vacuum deposition method, a sputtering method, an ion plating method, a spray pyrolysis method, a chemical plating method, an electroplating method, or a combination method thereof.
- a conductive layer is formed on any suitable substrate (preferably a resin substrate film (1a)).
- the vacuum vapor deposition method and the sputtering method are preferable from the viewpoints of the forming speed of the conductive layer, the formability of the large area film, and the productivity.
- the material for forming the conductive layer (1b) is, for example, a metal-based material made of gold, silver, platinum, palladium, copper, aluminum, nickel, chromium, titanium, iron, cobalt, tin, an alloy thereof, or the like; A metal oxide-based material composed of indium oxide, tin oxide, titanium oxide, cadmium oxide, a mixture thereof and the like; another metal compound composed of copper iodide and the like; and the like are used.
- any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired.
- a thickness is, for example, preferably 30 ⁇ to 600 ⁇ when formed from a metal-based material, and preferably 80 ⁇ to 5000 ⁇ when formed from a metal oxide-based material.
- the surface resistance value of the conductive layer (1b) is preferably 1.0 ⁇ 10 10 ⁇ / ⁇ or less, more preferably 1.0 ⁇ 10 9 ⁇ / ⁇ or less, and further preferably 1.0 ⁇ 10 It is 8 ⁇ / ⁇ or less, and particularly preferably 1.0 ⁇ 10 7 ⁇ / ⁇ or less.
- a corona discharge is applied to the surface of the substrate (preferably the resin substrate film (1a)).
- Adhesion between the conductive layer and the base material (preferably the resin base material film (1a)) is subjected to any appropriate pretreatment such as treatment, ultraviolet irradiation treatment, plasma treatment, spatter etching treatment, and undercoat treatment. Can also be increased.
- the base film (1) may have an antistatic layer (1c).
- the antistatic layer (1c) is typically between the pressure-sensitive adhesive layer (1) and the resin base film (1a) and / or between the resin base film (1a) and the pressure-sensitive adhesive layer (2). Can be placed in.
- the antistatic layer (1c) may be only one layer or two or more layers.
- any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired.
- Such a thickness is preferably 1 nm to 1000 nm, more preferably 5 nm to 900 nm, still more preferably 7.5 nm to 800 nm, and particularly preferably 10 nm to 700 nm.
- the surface resistance value of the antistatic layer (1c) is preferably 1.0 ⁇ 10 10 ⁇ / ⁇ or less, more preferably 8.0 ⁇ 10 9 ⁇ / ⁇ or less, and further preferably 5.0 ⁇ . It is 10 9 ⁇ / ⁇ or less, and particularly preferably 1.0 ⁇ 10 9 ⁇ / ⁇ or less.
- any appropriate antistatic layer can be adopted as long as it can exert an antistatic effect, as long as the effect of the present invention is not impaired.
- ⁇ A-1 As such an antistatic layer (1c), ⁇ A-1.
- the description of the antistatic layer (IIIc) in the release liner (III) >> section may be incorporated.
- the pressure-sensitive adhesive layer (2) is composed of a radiation-curable pressure-sensitive adhesive that is cured by radiation.
- the radiation-curable pressure-sensitive adhesive is a pressure-sensitive adhesive that is cured by radiation.
- Examples of the radiation include radio waves, infrared rays, visible rays, ultraviolet rays, X-rays, gamma rays, and the like. From the viewpoint of ease of handling, ultraviolet rays and electron beams are preferable, and ultraviolet rays are more preferable.
- a high-pressure mercury lamp, a low-pressure mercury lamp, a black light, or the like can be used to irradiate ultraviolet rays. Examples of the irradiation amount of radiation for curing include 50 mJ / cm 2 or more.
- the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) is preferably a pressure-sensitive adhesive that is cured by irradiating an ultraviolet ray having a light amount of 500 mJ / cm 2 with a high-pressure mercury lamp.
- the thickness of the pressure-sensitive adhesive layer (2) is preferably 0.5 ⁇ m to 150 ⁇ m, more preferably 1 ⁇ m to 100 ⁇ m, still more preferably 2 ⁇ m to 80 ⁇ m, in that the effect of the present invention can be more exhibited. It is particularly preferably 3 ⁇ m to 50 ⁇ m, and most preferably 5 ⁇ m to 24 ⁇ m.
- the pressure-sensitive adhesive composition forming the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) preferably contains at least one selected from a (meth) acrylic resin and a urethane-based resin. That is, the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) is preferably at least one selected from the group consisting of the acrylic pressure-sensitive adhesive (2) and the urethane-based pressure-sensitive adhesive (2).
- the pressure-sensitive adhesive composition forming the acrylic pressure-sensitive adhesive (2) is the acrylic-based pressure-sensitive adhesive composition (2)
- the pressure-sensitive adhesive composition forming the urethane-based pressure-sensitive adhesive (2) is the urethane-based pressure-sensitive adhesive composition. It is a thing (2).
- the pressure-sensitive adhesive layer (2) preferably contains a polymerizable carbon-carbon double bond.
- This polymerizable carbon-carbon double bond is preferably a radically polymerizable carbon-carbon double bond.
- a three-dimensional network structure is formed in the pressure-sensitive adhesive layer (2), and the pressure-sensitive adhesive layer (2) is formed.
- the adhesive strength of 2) is reduced. As a result, the adhesive tape for optical members can exhibit excellent light peelability by irradiation.
- the pressure-sensitive adhesive layer (2) can be formed by any suitable method.
- a method for example, an adhesive composition (at least one selected from the group consisting of an acrylic pressure-sensitive adhesive composition (2) and a urethane-based pressure-sensitive adhesive composition (2)) is used as an arbitrary suitable base material.
- an adhesive composition at least one selected from the group consisting of an acrylic pressure-sensitive adhesive composition (2) and a urethane-based pressure-sensitive adhesive composition (2)
- a suitable base material for example, a method of applying on a base film (2)), heating and drying as necessary, and curing as necessary to form an adhesive layer on the base material can be mentioned.
- Examples of such an application method include a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, an air knife coater, a spray coater, a comma coater, a direct coater, and a roll brush coater. Method can be mentioned.
- the pressure-sensitive adhesive layer (2) may contain other components (2).
- the other component (2) may be only one kind or two or more kinds.
- any suitable other component may be adopted as long as the effect of the present invention is not impaired.
- Acrylic adhesive (2) > The acrylic pressure-sensitive adhesive (2) is formed from the acrylic pressure-sensitive adhesive composition (2).
- the acrylic pressure-sensitive adhesive composition (2) contains a (meth) acrylic resin (2).
- the (meth) acrylic resin (2) may be of only one type or of two or more types.
- the content ratio of the (meth) acrylic resin (2) in the acrylic pressure-sensitive adhesive composition (2) is preferably 60% by weight to 99.9% by weight, more preferably 65% by weight in terms of solid content. It is 99.9% by weight, more preferably 70% by weight to 99.9% by weight, particularly preferably 75% by weight to 99.9% by weight, and most preferably 80% by weight to 99.9% by weight. %.
- the acrylic pressure-sensitive adhesive composition (2) may contain a cross-linking agent. By using a cross-linking agent, the cohesive force of the acrylic pressure-sensitive adhesive (2) can be improved, and the effect of the present invention can be further exhibited.
- the cross-linking agent may be only one kind or two or more kinds.
- the cross-linking agent examples include a polyfunctional isocyanate-based cross-linking agent, an epoxy-based cross-linking agent, a melamine-based cross-linking agent, a peroxide-based cross-linking agent, a urea-based cross-linking agent, a metal alkoxide-based cross-linking agent, a metal chelate-based cross-linking agent, and a metal salt.
- examples thereof include a system-based cross-linking agent, a carbodiimide-based cross-linking agent, an oxazoline-based cross-linking agent, an aziridine-based cross-linking agent, and an amine-based cross-linking agent.
- at least one selected from the group consisting of a polyfunctional isocyanate-based cross-linking agent and an epoxy-based cross-linking agent is preferable in that the effects of the present invention can be further exhibited.
- polyfunctional isocyanate-based cross-linking agent examples include lower aliphatic polyisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, and 1,6-hexamethylene diisocyanate; cyclopentylene diisocyanate, cyclohexylene diisocyanate, and the like.
- Alicyclic polyisocyanates such as isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate; 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, etc.
- Aromatic polyisocyanates and the like examples include trimethylolpropane / tolylene diisocyanate adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name “Coronate L”) and trimethylolpropane / hexamethylene diisocyanate adduct (Nippon Polyurethane Industry Co., Ltd.).
- epoxy-based cross-linking agent examples include N, N, N', N'-tetraglycidyl-m-xylene diamine, diglycidyl aniline, and 1,3-bis (N, N-diglycidylamino).
- any appropriate content can be adopted as long as the effect of the present invention is not impaired.
- a content is preferably 30 parts by weight or less with respect to the solid content (100 parts by weight) of the (meth) acrylic resin (2), for example, in that the effect of the present invention can be more exhibited. It is more preferably 0.05 parts by weight to 20 parts by weight, further preferably 0.1 parts by weight to 18 parts by weight, particularly preferably 0.15 parts by weight to 15 parts by weight, and most preferably. It is 0.2 parts by weight to 10 parts by weight.
- the acrylic pressure-sensitive adhesive composition (2) preferably contains a photopolymerization initiator. That is, the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) contains a photopolymerization initiator.
- the content ratio of the photopolymerization initiator with respect to 100 parts by weight of the (meth) acrylic resin (2) in the acrylic pressure-sensitive adhesive composition (2) is preferably 0. It is 01 parts by weight to 20 parts by weight, more preferably 0.1 parts by weight to 10 parts by weight, still more preferably 0.5 parts by weight to 10 parts by weight, and particularly preferably 0.7 parts by weight to 5 parts by weight. It is a part by weight.
- the content ratio of the photopolymerization initiator to 100 parts by weight of the (meth) acrylic resin (2) in the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) further enhances the effect of the present invention.
- it is preferably 0.01 parts by weight to 20 parts by weight, more preferably 0.1 parts by weight to 10 parts by weight, and further preferably 0.5 parts by weight to 10 parts by weight.
- it is 0.7 parts by weight to 5 parts by weight.
- the photopolymerization initiator can be preferably used to cure the (meth) acrylic resin (2) with radiation.
- the photopolymerization initiator include a benzoin ether-based photopolymerization initiator, an acetophenone-based photopolymerization initiator, an ⁇ -ketol-based photopolymerization initiator, an aromatic sulfonyl chloride-based photopolymerization initiator, and a photoactive oxime-based photopolymerization initiator.
- Examples thereof include agents, benzoin-based photopolymerization initiators, benzyl-based photopolymerization initiators, benzophenone-based photopolymerization initiators, ketal-based photopolymerization initiators, thioxanthone-based photopolymerization initiators, and the like.
- benzoin ether-based photopolymerization initiator examples include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethan-1-one, and anisole.
- examples include methyl ether.
- examples of the acetophenone-based photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexylphenylketone, 4-phenoxydichloroacetophenone, and 4- (t-butyl). Examples include dichloroacetophenone.
- Examples of the ⁇ -ketol-based photopolymerization initiator include 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2-methylpropane-1-one, and the like. ..
- Examples of the aromatic sulfonyl chloride-based photopolymerization initiator include 2-naphthalene sulfonyl chloride and the like.
- Examples of the photoactive oxime-based photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime.
- Examples of the benzoin-based photopolymerization initiator include benzoin and the like.
- Examples of the benzyl-based photopolymerization initiator include benzyl and the like.
- Examples of the benzophenone-based photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, ⁇ -hydroxycyclohexylphenylketone and the like.
- Examples of the ketal-based photopolymerization initiator include benzyldimethyl ketal and the like.
- thioxanthone-based photopolymerization initiator examples include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, and dodecylthioxanthone.
- IGM Resins B. V examples thereof include the trade names "Omnirad 651", “Omnirad 184", “Omnirad 369", “Omnirad 819”, “Omnirad 2959”, “Omnirad 127” and the like.
- the acrylic pressure-sensitive adhesive composition (2) may contain any suitable other component as long as the effect of the present invention is not impaired.
- suitable other components include polymer components other than the (meth) acrylic resin (2), cross-linking accelerators, cross-linking catalysts, silane coupling agents, tackifier resins (rosin derivatives, polyterpene resins, petroleum resins, etc.). Oil-soluble phenols, etc.), anti-aging agents, inorganic fillers, organic fillers, metal powders, colorants (pigments, dyes, etc.), foils, UV absorbers, antioxidants, light stabilizers, chain transfer agents, etc.
- plasticizers examples thereof include plasticizers, softeners, surfactants, antistatic agents, conductive agents, stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat-resistant stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.
- the pressure-sensitive adhesive composition forming the radiation-curable pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2) preferably contains a (meth) acrylic resin, and the pressure-sensitive adhesive composition is (i) (meth) acrylic-based.
- the acrylic pressure-sensitive adhesive composition (2) preferably contains (i) (meth) acrylic resin (2a) and a pressure-sensitive adhesive containing a compound having two or more radiopolymerizable functional groups. It is at least one selected from a composition and a pressure-sensitive adhesive composition containing (ii) a (meth) acrylic resin (2b) having one or more radiopolymerizable functional groups in a part of a side chain.
- the acrylic pressure-sensitive adhesive composition (2) more preferably contains (i) (meth) acrylic resin (2a) and contains a radiation-polymerizable functional group. It is a pressure-sensitive adhesive composition containing two or more compounds. This is because the raw material used for synthesizing the (meth) acrylic resin (2b) is expensive, and in order to synthesize the (meth) acrylic resin (2b), prepolymer polymerization and side chains are used. This is because the process is complicated because an addition reaction for introducing a radiopolymerizable functional group is required in a part thereof.
- the acrylic pressure-sensitive adhesive composition (2) is preferably a (meth) acrylic resin having one or more radiation-polymerizable functional groups in a part of the (ii) side chain. It is a pressure-sensitive adhesive composition containing (2b).
- a pressure-sensitive adhesive composition containing a (meth) acrylic resin (2a) and containing a compound having two or more radiopolymerizable functional groups tends to have an increased adhesive strength during patch storage. This is because the compound having two or more radiopolymerizable functional groups is not incorporated into the cross-linking of the acrylic resin and flows in the pressure-sensitive adhesive.
- a preferred embodiment 1 of the acrylic pressure-sensitive adhesive composition (2) is a pressure-sensitive adhesive composition containing a (meth) acrylic resin (2a) and containing a compound having two or more radiation-polymerizable functional groups. ..
- the (meth) acrylic resin (2a) may be of only one type or may be of two or more types.
- the compound having two or more radiopolymerizable functional groups may be only one kind or two or more kinds.
- the total content ratio of the (meth) acrylic resin (2a) and the compound having two or more radiopolymerizable functional groups in the acrylic pressure-sensitive adhesive composition (2) is preferably 60 in terms of solid content. It is from% to 99.9% by weight, more preferably 65% by weight to 99.9% by weight, still more preferably 70% by weight to 99.9% by weight, and particularly preferably 75% by weight to 99% by weight. It is 9% by weight, most preferably 80% by weight to 99.9% by weight.
- the above (meth) acrylic resin (2a) includes ⁇ A-2-1.
- the description of the (meth) acrylic resin (1) in the section of the acrylic pressure-sensitive adhesive (1)> can be incorporated.
- the (meth) acrylic resin (2a) preferably contains (meth) acrylic acid alkyl ester having an alkyl group having 8 or more carbon atoms in the side chain as an alkyl ester group in an amount of 0% by weight to 50% by weight. It is obtained by polymerizing a monomer composition.
- the (meth) acrylic resin (2a) simply contains (meth) acrylic acid alkyl ester having an alkyl group having 8 or more carbon atoms in the side chain as an alkyl ester group in an amount of 0% by weight to 50% by weight.
- the content of the (meth) acrylic acid alkyl ester as a base is more preferably 0% by weight to 40% by weight, further preferably 0% by weight to 30% by weight, still more preferably 0% by weight to 20% by weight. %, Particularly preferably 0% by weight to 10% by weight, and most preferably substantially 0% by weight.
- Examples of the compound having two or more radiopolymerizable functional groups include a compound in which (meth) acrylic acid or (meth) acrylate having a carboxyl group is added to the epoxy group of the compound having two or more epoxy groups. Examples thereof include monomers having a hydroxyl group. Specific examples of the compound having two or more such radiation-polymerizable functional groups include ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, and tripropylene glycol.
- Diglycidyl ether polypropylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,5-pentanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,9-nonanediol diglycidyl ether, Examples thereof include neopentyl glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, and glycerin diglycidyl ether.
- a commercially available product may be used as the compound having two or more radiopolymerizable functional groups.
- examples of such commercially available products include “epoxy ester” series such as “epoxy ester 3000MK”, “epoxy ester 200PA” and “epoxy ester 70PA” manufactured by Kyoeisha Chemical Co., Ltd., and trade names manufactured by Nagase ChemteX.
- examples include the "Denacol acrylate” series such as "DA-314" and the "Shikou” series such as “Shikou UV-1700B” and “Shikou UV-3000B” manufactured by Nippon Synthetic Chemical Co., Ltd.
- the content ratio of the compound having two or more radiopolymerizable functional groups to 100 parts by weight of the (meth) acrylic resin (2a) is the effect of the present invention. Is preferably 1 part by weight to 200 parts by weight, more preferably 20% by weight to 150% by weight, still more preferably 30% by weight to 100% by weight, and particularly preferably 30. It is from% by weight to 75% by weight.
- the glass transition temperature calculated by the FOX formula of the (meth) acrylic resin (2a) is preferably 260 K or less, more preferably 250 K or less. It is more preferably 240K or less, and particularly preferably 230K or less. If the glass transition temperature calculated by the FOX formula of the (meth) acrylic resin (2a) is within the above range, the pressure-sensitive adhesive layer before being cured by radiation in the pressure-sensitive adhesive tape for optical members according to the embodiment of the present invention. It is possible to suppress the occurrence of stick slip when the holding tape (II) is peeled off in the environment of (2) at a temperature of 23 ° C. and a humidity of 50% RH.
- a preferred embodiment 2 of the acrylic pressure-sensitive adhesive composition (2) is a pressure-sensitive adhesive composition containing a (meth) acrylic resin (2b) having one or more radiation-polymerizable functional groups in a part of a side chain. ..
- the (meth) acrylic resin (2b) may be of only one type or may be of two or more types.
- the content ratio of the (meth) acrylic resin (2b) in the acrylic pressure-sensitive adhesive composition (2) is preferably 60% by weight to 99.9% by weight, more preferably 65 in terms of solid content. It is from% by weight to 99.9% by weight, more preferably 70% by weight to 99.9% by weight, particularly preferably 75% by weight to 99.9% by weight, and most preferably 80% by weight to 99% by weight. 9% by weight.
- the glass transition temperature calculated by the FOX formula of the (meth) acrylic resin (2b) is preferably 260 K or less, more preferably 259 K or less. It is more preferably 258K or less. If the glass transition temperature calculated by the FOX formula of the (meth) acrylic resin (2b) is within the above range, the pressure-sensitive adhesive layer before being cured by radiation in the pressure-sensitive adhesive tape for optical members according to the embodiment of the present invention. It is possible to suppress the occurrence of stick slip when the holding tape (II) is peeled off in the environment of (2) at a temperature of 23 ° C. and a humidity of 50% RH.
- the glass transition temperature calculated by the FOX formula is based on the Tg of the homopolymer of each monomer constituting the polymer and the mass fraction (copolymerization ratio based on the mass) of the monomer.
- a value obtained from a Fox equation. Therefore, the Tg of the polymer can be adjusted by appropriately changing the composition of the constituent monomer components (that is, the type and amount ratio of the monomers used for synthesizing the polymer).
- the Tg of the homopolymer the value described in the publicly known material shall be adopted.
- Tg of the homopolymer examples include the following values. 2-Ethylhexyl acrylate -70 ° C n-Butyl acrylate -55 ° C Ethyl acrylate-22 ° C Methyl acrylate 8 °C Methyl methacrylate 105 ° C Cyclohexyl acrylate 15 ° C Cyclohexyl methacrylate 66 ° C Isobornyl acrylate 94 ° C Isobornyl methacrylate 180 ° C N, N-dimethylaminoethyl acrylate 18 ° C N, N-dimethylaminoethyl methacrylate 18 ° C.
- N N-diethylaminoethyl acrylate 20 ° C N, N-diethylaminoethyl methacrylate 20 ° C.
- a homopolymer solution having a solid content concentration of 33% by mass.
- this homopolymer solution is cast-coated on a release liner and dried to prepare a test sample (sheet-shaped homopolymer) having a thickness of about 2 mm.
- This test sample is punched into a disk shape with a diameter of 7.9 mm, sandwiched between parallel plates, and subjected to shear strain at a frequency of 1 Hz using a viscoelasticity tester (ARES, manufactured by Leometrics) in the temperature range of ⁇ 70 to 150 ° C.
- the viscoelasticity is measured in a shear mode at a heating rate of 5 ° C./min, and the peak top temperature of tan ⁇ is defined as Tg of the homopolymer.
- the (meth) acrylic resin (2b) is a (meth) acrylic resin having one or more radiation-polymerizable functional groups in a part of the side chain.
- a (meth) acrylic resin (2b) is a compound having a functional group capable of reacting with the functional group and a radiopolymerizable functional group after copolymerizing a monomer having a functional group with the base polymer in advance (2b). Examples thereof include a method of condensing or an addition reaction of a radiocurable monomer) while maintaining the radiocurability of a photopolymerizable functional group.
- Examples of such a combination of functional groups include a carboxyl group and an epoxy group (particularly, a glycidyl group), a carboxyl group and an aziridyl group, and a hydroxyl group and an isocyanate group.
- a combination of a hydroxyl group and an isocyanate group is preferable because of the ease of reaction tracking.
- the functional group may be on either side of the base polymer or the radiation-curable monomer as long as the combination of these functional groups produces a base polymer having a radiopolymerizable functional group.
- a combination in which the base polymer has a hydroxyl group and the radiation curable monomer has an isocyanate group is suitable.
- the (meth) acrylic resin (A) in the section of the preferred embodiment 1] of the (meth) acrylic resin (1) that is, the alkyl group of the (component a) alkyl ester moiety has 1 to 12 carbon atoms (1 to 12).
- composition (A) comprising at least one selected from the group consisting of (meth) acrylic acid alkyl esters, (b component) OH groups (meth) acrylic acids and (meth) acrylic acids.
- Examples of the (meth) acrylic resin (A) include those that employ a monomer having a functional group (for example, a carboxyl group, a hydroxyl group, etc.) as at least one of the monomers used.
- Examples of the radiation-curable monomer for obtaining the (meth) acrylic resin (2b) include trimethylolpropanetri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and tetraethylene.
- the radiation curable monomer may be only one kind or two or more kinds.
- the reaction ratio between the base polymer and the radiation-curable monomer for obtaining the (meth) acrylic resin (2b) is preferably 1 part by weight to 100 parts by weight with respect to 100 parts by weight of the base polymer. , More preferably 5 parts by weight to 70 parts by weight, still more preferably 10 parts by weight to 50 parts by weight.
- the urethane-based pressure-sensitive adhesive composition (2) contains a urethane-based resin (2).
- the urethane resin (2) may be of only one type or may be of two or more types.
- the content ratio of the base polymer in the urethane-based pressure-sensitive adhesive composition (2) is preferably 30% by weight or more, more preferably 30% by weight to 100% by weight, still more preferably 40% by weight to 99% by weight. It is particularly preferably 50% by weight to 97% by weight, and most preferably 60% by weight to 95% by weight.
- the base polymer in the urethane-based pressure-sensitive adhesive composition (2) may be only one kind or two or more kinds.
- the materials may be collectively added into the reaction vessel for reaction, or some materials may be added into the reaction vessel during the reaction to control the reaction. You may.
- the heating temperature can be set to any suitable value depending on the boiling point of the solvent used.
- the heating temperature is preferably 40 ° C to 100 ° C.
- the deactivation of the isocyanate-based cross-linking agent can be prevented.
- any suitable polymerization inhibitor may be added as needed.
- any suitable reaction catalyst may be further added in order to facilitate the reaction.
- the amount of the catalyst used may be appropriately set according to the amount of various materials used for the reaction and the like.
- a preferred embodiment 1 of the urethane-based pressure-sensitive adhesive composition (2) contains a urethane-based resin (2) as a base polymer, a compound having a polymerizable carbon-carbon double bond, and an isocyanate-based cross-linking agent.
- the urethane resin (2) may be of only one type or may be of two or more types.
- the compound having a polymerizable carbon-carbon double bond may be only one kind or two or more kinds.
- the isocyanate-based cross-linking agent may be only one kind or two or more kinds.
- Urethane resin (2) As the urethane-based resin (2) in the first embodiment, any suitable urethane-based resin can be adopted as long as the effects of the present invention are not impaired.
- a urethane-based resin (2) a urethane-based resin (one-shot method urethane resin (2)) formed from a composition containing a polyol (A) and a polyfunctional isocyanate compound (B) is preferable.
- it is a urethane-based resin (prepolymer method urethane resin (2)) formed from a composition containing a urethane prepolymer (C) and a polyfunctional isocyanate compound (B).
- the urethane-based resin (2) may contain any suitable other component as long as the effect of the present invention is not impaired.
- suitable other components include resin components other than the urethane resin (2), tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antiaging agents, and the like.
- examples thereof include conductive agents, ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.
- Such other components may be only one kind or two or more kinds.
- the urethane-based resin (one-shot urethane resin (2)) formed from the composition containing the polyol (A) and the polyfunctional isocyanate compound (B) is specifically more preferably the polyol (A). It is a polyurethane resin obtained by curing a composition containing a functional isocyanate compound (B).
- the polyol (A) may be only one kind or two or more kinds.
- the polyfunctional isocyanate compound (B) may be only one kind or two or more kinds.
- any suitable polyol (A) can be adopted as long as the effect of the present invention is not impaired.
- examples of such a polyol (A) include dihydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, and hexamethylene glycol; trihydric alcohols such as trimethylolpropane and glycerin; and tetrahydric alcohols such as pentaerythritol.
- Polyether polyol obtained by addition polymerization of ethylene oxide, propylene oxide, tetrahydrofuran, etc .
- Divalent alcohols such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, hexamethylene glycol, dipropylene glycol, 1,4- Polyester polyol consisting of a polycondensate of alcohols such as butanediol, 1,6-hexanediol and neopentylglycol and divalent basic acids such as adipic acid, azelaic acid and sebatic acid; hydroxyethyl (meth) acrylate, hydroxy Acrylic polyols such as copolymers of monomers having hydroxyl groups such as propyl (meth) acrylates and copolymers of hydroxyl group-containing substances and acrylic monomers; carbonate polyols; epoxy polyols such as amine-modified epoxy resins; caprolactone polyols; etc.
- examples of the polyether polyol include water, low molecular weight polyols (ethylene glycol, propylene glycol, glycerin, trimethylolpropane, pentaerythritol, etc.), bisphenols (bisphenol A, etc.), and dihydroxybenzene (catechol, resorcin). , Hydroquinone, etc.) as an initiator, and examples thereof include polyether polyols obtained by addition-polymerizing alkylene oxides such as ethylene oxide, propylene oxide, and butylene oxide. Specific examples thereof include polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol and the like.
- the polyester polyol can be obtained by, for example, an esterification reaction between a polyol component and an acid component.
- the polyol component include ethylene glycol, diethylene glycol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, and 2-butyl-2-ethyl-1.
- the acid component examples include succinic acid, methylsuccinic acid, adipic acid, piceric acid, azelaic acid, sebacic acid, 1,12-dodecanedioic acid, 1,14-tetradecanedioic acid, dimer acid, 2-methyl-1, 4-Cyclohexanedicarboxylic acid, 2-ethyl-1,4-cyclohexanedicarboxylic acid, terephthalic acid, isophthalic acid, phthalic acid, isophthalic acid, terephthalic acid, 1,4-naphthalenedicarboxylic acid, 4,4'-biphereldicarboxylic acid , These acid anhydrides and the like.
- the number average molecular weight Mn of the polyol (A) is preferably 300 to 100,000, more preferably 400 to 75,000, still more preferably 450 to 50,000, and particularly preferably 500 to 30,000.
- polyfunctional isocyanate compound (B) any suitable polyfunctional isocyanate compound that can be used in the urethanization reaction can be adopted.
- examples of such a polyfunctional isocyanate compound (B) include a polyfunctional aliphatic isocyanate compound, a polyfunctional alicyclic isocyanate, and a polyfunctional aromatic isocyanate compound.
- the equivalent ratio of NCO group to OH group in the polyol (A) and the polyfunctional isocyanate compound (B) is preferably 5.0 or less, more preferably 0.1 to 3.0, as the NCO group / OH group. It is more preferably 0.2 to 2.5, particularly preferably 0.3 to 2.25, and most preferably 0.5 to 2.0.
- the content ratio of the polyfunctional isocyanate compound (B) is preferably 1.0% by weight to 30% by weight, more preferably 1.5% by weight, based on the polyol (A). % To 27% by weight, more preferably 2.0% by weight to 25% by weight, particularly preferably 2.3% by weight to 23% by weight, and most preferably 2.5% by weight to 20% by weight. Is.
- any appropriate method can be adopted as long as the effect of the present invention is not impaired, such as a urethanization reaction method using bulk polymerization or solution polymerization.
- a catalyst is preferably used to cure the composition containing the polyol (A) and the polyfunctional isocyanate compound (B). Examples of such a catalyst include organometallic compounds and tertiary amine compounds.
- the composition containing the polyol (A) and the polyfunctional isocyanate compound (B) may contain any suitable other components as long as the effects of the present invention are not impaired.
- a urethane-based resin (prepolymer method urethane resin (2)) formed from a composition containing a urethane prepolymer (C) and a polyfunctional isocyanate compound (B) is obtained by using a so-called "urethane prepolymer" as a raw material.
- a urethane prepolymer a so-called "urethane prepolymer” as a raw material.
- Any suitable urethane-based resin can be used as long as it is a urethane-based resin.
- Examples of the prepolymer method urethane resin (2) include urethane-based resins formed from a composition containing a polyurethane polyol as a urethane prepolymer (C) and a polyfunctional isocyanate compound (B).
- the urethane prepolymer (C) may be of only one type or may be two or more types.
- the polyfunctional isocyanate compound (B) may be only one kind or two or more kinds.
- the polyurethane polyol as the urethane prepolymer (C) is preferably a polyester polyol (a1) or a polyether polyol (a2) alone or in a mixture of (a1) and (a2) in the presence of a catalyst or. It is formed by reacting with an organic polyisosianate compound (a3) under no catalyst.
- a1 polyester polyol
- a2 polyether polyol
- a3 organic polyisosianate compound
- the molecular weight of the polyester polyol (a1) can be from low molecular weight to high molecular weight.
- the number average molecular weight is preferably 100 to 100,000. If the number average molecular weight is less than 100, the reactivity becomes high and gelation may occur easily. If the number average molecular weight exceeds 100,000, the reactivity may be lowered, and the cohesive force of the polyurethane polyol itself may be reduced.
- the amount of the polyester polyol (a1) used is preferably 0 mol% to 90 mol% in the polyol constituting the polyurethane polyol.
- the molecular weight of the polyether polyol (a2) can be from low molecular weight to high molecular weight.
- the number average molecular weight is preferably 100 to 100,000. If the number average molecular weight is less than 100, the reactivity becomes high and gelation may occur easily. If the number average molecular weight exceeds 100,000, the reactivity may be lowered, and the cohesive force of the polyurethane polyol itself may be reduced.
- the amount of the polyether polyol (a2) used is preferably 0 mol% to 90 mol% in the polyol constituting the polyurethane polyol.
- polyether polyol (a2) only a bifunctional polyether polyol may be used, or a polyether having a number average molecular weight of 100 to 100,000 and having at least 3 or more hydroxyl groups in one molecule. Part or all of the polyol may be used. When a part or all of the polyether polyol (a2) having a number average molecular weight of 100 to 100,000 and having at least 3 or more hydroxyl groups in one molecule is used, it has adhesive strength and removability. The balance can be good. In such a polyether polyol, if the number average molecular weight is less than 100, the reactivity becomes high and gelation may easily occur.
- the number average molecular weight of such a polyether polyol is more preferably 100 to 10000.
- organic polyisocyanate compound (a3) any suitable organic polyisocyanate compound can be used.
- organic polyisocyanate compound (a3) include aromatic polyisocyanates, aliphatic polyisocyanates, aromatic aliphatic polyisocyanates, and alicyclic polyisocyanates.
- Any suitable catalyst can be used as the catalyst that can be used to obtain the polyurethane polyol.
- a catalyst include tertiary amine compounds and organometallic compounds.
- a method for obtaining a polyurethane polyol for example, 1) a method of charging a polyester polyol, a polyether polyol, a catalyst, and an organic polyisocyanate into a flask in full quantity, and 2) a method of charging a polyester polyol, a polyether polyol, and a catalyst into a flask and charging an organic polyisocianate.
- the method 2) is preferable in controlling the reaction.
- Any suitable solvent can be used to obtain the polyurethane polyol.
- a solvent include methyl ethyl ketone, ethyl acetate, toluene, xylene, acetone and the like.
- toluene is preferable.
- polyfunctional isocyanate compound (B) As the polyfunctional isocyanate compound (B), the above-mentioned description of the polyfunctional isocyanate compound (B) can be incorporated.
- composition containing the urethane prepolymer (C) and the polyfunctional isocyanate compound (B) may contain any suitable other components as long as the effects of the present invention are not impaired.
- a so-called "urethane prepolymer” is used as a raw material. Any suitable manufacturing method can be adopted as long as it is a method for manufacturing a polyurethane resin.
- the number average molecular weight Mn of the urethane prepolymer (C) is preferably 3000 to 1,000,000.
- the equivalent ratio of NCO group to OH group in the urethane prepolymer (C) and the polyfunctional isocyanate compound (B) is preferably 5.0 or less, more preferably 0.01 to 3 as the NCO group / OH group. It is 0.0, more preferably 0.02 to 2.5, particularly preferably 0.03 to 2.25, and most preferably 0.05 to 2.0.
- the polyfunctional isocyanate compound (B) is preferably 0.01% by weight to 30% by weight, more preferably 0% by weight, based on the urethane prepolymer (C). It is 03% by weight to 20% by weight, more preferably 0.05% by weight to 15% by weight, particularly preferably 0.075% by weight to 10% by weight, and most preferably 0.1% by weight to 8% by weight. It is% by weight.
- the compound having a polymerizable carbon-carbon double bond is preferably a group consisting of a compound having a bifunctional or higher functional polymer-carbon double bond and a functional group-containing monomer having a polymerizable carbon-carbon double bond. At least one selected from.
- the compound having a bifunctional or higher polymerizable carbon-carbon double bond a compound having any appropriate bifunctional or higher polymerizable carbon-carbon double bond is adopted as long as the effect of the present invention is not impaired. obtain.
- the compound having such a bifunctional or higher polymerizable carbon-carbon double bond include trimethylolpropanetri (meth) acrylate, pentaerythritol tri (meth) acrylate, tetraethylene glycol di (meth) acrylate, and 1 , 6-Hexanediol (meth) acrylate, neopentyl glycol di (meth) acrylate, dipentaerythritol hexa (meth) acrylate and other (meth) acrylic acids and polyhydric alcohol esters; ester acrylate oligomers; 2-propenyl Cyanurates such as -3-butenyl cyanurate, tris (2-methacryloxyethyl) isocyanurate,
- the content ratio of the compound having a bifunctional or higher polymerizable carbon-carbon double bond in the urethane-based pressure-sensitive adhesive composition (2) is preferably 100 parts by weight of the urethane-based resin (2) as the base polymer. It is 1 part by weight to 70 parts by weight, more preferably 3 parts by weight to 50 parts by weight, further preferably 6 parts by weight to 55 parts by weight, and particularly preferably 10 parts by weight to 50 parts by weight.
- any appropriate functional group-containing monomer having a polymerizable carbon-carbon double bond can be adopted as long as the effect of the present invention is not impaired.
- the functional group-containing monomer having such a polymerizable carbon-carbon double bond include (meth) acrylic acid in the epoxy group of a compound having two or more epoxy groups, or (meth) having a carboxyl group. Examples thereof include a monomer having a hydroxyl group, such as a compound to which an acrylate is added.
- polyol having such a polymerizable carbon-carbon double bond examples include ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, and tripropylene glycol.
- Diglycidyl ether polypropylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,5-pentanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,9-nonanediol diglycidyl ether, Examples thereof include neopentyl glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, and glycerin diglycidyl ether.
- a commercially available product may be used as the functional group-containing monomer having a polymerizable carbon-carbon double bond.
- commercially available products include "epoxy ester” series such as “epoxy ester 3000MK”, “epoxy ester 200PA” and “epoxy ester 70PA” manufactured by Kyoeisha Chemical Co., Ltd., and trade names manufactured by Nagase ChemteX.
- examples include the "Denacol acrylate” series such as "DA-314" and the "Shikou” series such as “Shikou UV-1700B” and “Shikou UV-3000B” manufactured by Nippon Synthetic Chemical Co., Ltd.
- the content ratio of the polyol having a polymerizable carbon-carbon double bond in the urethane-based pressure-sensitive adhesive composition (2) is preferably 1 part by weight to 70 parts by weight with respect to 100 parts by weight of the urethane-based resin as the base polymer. It is more preferably 3 parts by weight to 50 parts by weight, further preferably 6 parts by weight to 55 parts by weight, and particularly preferably 10 parts by weight to 50 parts by weight.
- Isocyanate-based cross-linking agent any suitable isocyanate-based cross-linking agent can be adopted as long as the effects of the present invention are not impaired.
- examples of such isocyanate-based cross-linking agents include aromatic diisocyanates, aliphatic diisocyanates, alicyclic diisocyanates, and dimers and trimers of these diisocyanates.
- isocyanate-based cross-linking agent a commercially available product may be used.
- examples of commercially available polyisocyanates include the product name "Takenate 600" manufactured by Mitsui Chemicals, the product name “Duranate TPA100” manufactured by Asahi Kasei Chemicals, and the product names "Coronate L” and “Coronate HL” manufactured by Nippon Polyurethane Industry Co., Ltd. , “Coronate HK”, “Coronate HX”, “Coronate 2096” and the like.
- the content ratio of the isocyanate-based cross-linking agent in the urethane-based pressure-sensitive adhesive composition (2) is preferably 0.1 part by weight to 50 parts by weight with respect to 100 parts by weight of the urethane-based resin (2) as the base polymer. , More preferably 0.5 parts by weight to 40 parts by weight, further preferably 1 part by weight to 35 parts by weight, and particularly preferably 3 parts by weight to 30 parts by weight.
- the urethane-based pressure-sensitive adhesive composition (2) may contain any suitable other components as long as the effects of the present invention are not impaired.
- suitable other components include resin components other than urethane resins, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antioxidants, conductive agents, and the like.
- examples thereof include ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like.
- the other components may be only one kind or two or more kinds.
- a preferred embodiment 2 of the urethane-based pressure-sensitive adhesive composition (2) is a monomer composition containing a monomer in which the urethane-based resin (2) as a base polymer has at least two functional groups capable of reacting with polyisocyanate and an isocyanate group. At least one selected from the monomer having at least two functional groups capable of reacting with the polyisocyanate and the isocyanate group obtained by polymerizing the above has a polymerizable carbon-carbon double bond.
- the urethane resin (2) may be of only one type or may be of two or more types.
- the urethane-based pressure-sensitive adhesive composition (2) preferably contains an isocyanate-based cross-linking agent.
- the isocyanate-based cross-linking agent may be only one kind or two or more kinds.
- the isocyanate-based cross-linking agent is ⁇ A-4-2-1-3.
- the explanation in the section of "Isocyanate-based cross-linking agent" may be incorporated.
- the urethane resin (2) may contain any suitable component as long as the effect of the present invention is not impaired.
- suitable component include resin components other than urethane-based resins, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antioxidants, conductive agents, and ultraviolet absorbers.
- resin components other than urethane-based resins include resin components other than urethane-based resins, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, antioxidants, conductive agents, and ultraviolet absorbers.
- agents, antioxidants, light stabilizers, surface lubricants, leveling agents, corrosion inhibitors, heat-resistant stabilizers, polymerization inhibitors, lubricants, solvents, catalysts and the like Such a component may be only one kind or two or more kinds.
- the urethane resin (2) is obtained by polymerizing a monomer composition containing a polyisocyanate and a monomer having at least two functional groups capable of reacting with an isocyanate group. At this time, if at least one of the polyisocyanate and the monomer having at least two functional groups capable of reacting with the isocyanate group has a polymerizable carbon-carbon double bond, the polymerizable carbon-in the urethane resin (2). A carbon double bond is introduced.
- the total content of the monomers having at least two groups is preferably 1% by weight to 70% by weight, more preferably 3% by weight to 60% by weight, still more preferably 5% by weight to 50% by weight. Yes, and particularly preferably 10% by weight to 40% by weight.
- the polymerizable carbon-carbon double bond is preferably one in which the base polymer can form a three-dimensional network structure by irradiation with radiation, and preferably at least one selected from an acryloyl group and a methacryloyl group. It is a polymerizable carbon-carbon double bond possessed by a seed group.
- any suitable polyisocyanate can be adopted as long as the effect of the present invention is not impaired.
- examples of such polyisocyanates include aromatic diisocyanates, aliphatic diisocyanates, alicyclic diisocyanates, and dimers and trimers of these diisocyanates.
- Specific examples of such polyisocyanate include tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, and 1,5-naphthylylene.
- examples of the trimer include isocyanurate type, burette type, and allophanate type.
- the polyisocyanate may be only one kind or two or more kinds.
- diisocyanate having two isocyanate groups in one molecule is preferable in that the effect of the present invention can be further exhibited.
- the content of diisocyanate in the polyisocyanate used for producing the base polymer is preferably 50% by weight to 100% by weight, more preferably 75% by weight to 100% by weight, still more preferably 90% by weight to 100% by weight. %, Particularly preferably 95% by weight to 100% by weight.
- any appropriate polyisocyanate having a polymerizable carbon-carbon double bond can be adopted as long as the effect of the present invention is not impaired.
- the polyisocyanate having such a polymerizable carbon-carbon double bond include a polyisocyanate having a polymerizable carbon-carbon double bond-containing group such as a vinyl group, an acryloyl group, and a methacryloyl group.
- the polyisocyanate having a polymerizable carbon-carbon double bond-containing group can be obtained, for example, by subjecting the polyisocyanate to an addition reaction with a compound having a polymerizable carbon-carbon double bond-containing group.
- the polyisocyanate having a polymerizable carbon-carbon double bond-containing group may be only one kind or two or more kinds. Further, a polyisocyanate having a polymerizable carbon-carbon double bond-containing group and a polyisocyanate not having a polymerizable carbon-carbon double bond-containing group may be used in combination.
- Examples of the compound having a polymerizable carbon-carbon double bond-containing group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and (meth). ) 6-Hydroxyhexyl acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl ( Hydroxy group-containing monomers such as meta) acrylate; (meth) acrylamide and the like can be mentioned.
- polyisocyanate a commercially available product may be used.
- examples of commercially available polyisocyanates include the product name "Takenate 600" manufactured by Mitsui Chemicals, the product name “Duranate TPA100” manufactured by Asahi Kasei Chemicals, and the product names "Coronate L” and “Coronate HL” manufactured by Nippon Polyurethane Industry Co., Ltd. , “Coronate HK”, “Coronate HX”, “Coronate 2096” and the like.
- any suitable functional group-containing monomer can be adopted as long as the effect of the present invention is not impaired.
- any functional group capable of reacting with the isocyanate group any functional group may be used as long as it can undergo an addition reaction with the isocyanate group and the polyisocyanate and the functional group-containing monomer can form a polymer.
- the functional group capable of reacting with the isocyanate group is preferably at least one selected from the group consisting of a hydroxyl group, an amino group, and a carboxyl group.
- the functional groups of the functional group-containing monomers may be all the same functional group or different functional groups.
- the functional group capable of reacting with the isocyanate group a hydroxyl group is preferable because the reaction can be easily controlled. Therefore, as the functional group-containing monomer, a polyol is preferable.
- the functional group-containing monomer may be only one kind or two or more kinds.
- any suitable polyol can be adopted as long as the effect of the present invention is not impaired.
- the low molecular weight polyol include dihydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, butylene glycol and hexamethylene glycol; trihydric alcohols such as trimethylolpropane and glycerin; and tetrahydric alcohols such as pentaerythritol; Can be mentioned.
- the high molecular weight polyol examples include a polyether polyol obtained by addition polymerization of ethylene oxide, propylene oxide, tetrahydrofuran and the like; the above dihydric alcohol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, and the like.
- a polyester polyol composed of a polycondensate of an alcohol such as neopentyl glycol and a divalent basic acid such as adipic acid, azelaic acid, and sebatic acid; it has a hydroxyl group such as hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate.
- acrylic polyols such as copolymers of monomers and copolymers of hydroxyl group-containing substances and acrylic monomers
- carbonate polyols epoxy polyols such as amine-modified epoxy resins
- caprolactone polyols and the like.
- the polyol a divalent alcohol, a polyether polyol, and a polyester polyol are preferable.
- a monomer having a functional group other than a hydroxyl group may be used in combination.
- the monomer having a functional group other than the hydroxyl group include a monomer having an amino group such as hexamethylenediamine, isophoronediamine, dichlorodiaminodiphenylmethane, diethyltoluenediamine, poly (propylene glycol) diamine, and ⁇ -aminoethyl alcohol; , Monomers having a carboxyl group such as sebacic acid, isophthalic acid, terephthalic acid; and the like.
- a monomer having at least two functional groups capable of reacting with an isocyanate group having a polymerizable carbon-carbon double bond (a functional group-containing monomer having a polymerizable carbon-carbon double bond)
- the effect of the present invention is not impaired.
- functional group-containing monomers having any suitable polymerizable carbon-carbon double bond can be employed.
- the functional group-containing monomer having such a polymerizable carbon-carbon double bond include a functional group-containing monomer having a polymerizable carbon-carbon double bond-containing group such as a vinyl group, an acryloyl group, and a methacryloyl group. Be done.
- the functional group-containing monomer having such a polymerizable carbon-carbon double bond include glycerin monomethacrylate, trimethylolpropane monoallyl ether, trimethylolethanemono (meth) acrylate, and trimethylolpropane.
- examples thereof include mono (meth) acrylate, pentaerythritol mono (meth) acrylate, pentaerythritol di (meth) acrylate, dipentaerythritol tetra (meth) acrylate, and dipentaerythritol tri (meth) acrylate.
- ⁇ A-4-2-1-2 As a functional group-containing monomer having a polymerizable carbon-carbon double bond, ⁇ A-4-2-1-2.
- the description of the functional group-containing monomer having a polymerizable carbon-carbon double bond in the section "Compounds having a polymerizable carbon-carbon double bond" can be incorporated.
- the ratio of NCO equivalent / functional group equivalent (hereinafter, NCO / functional group ratio) is preferably 0.5 to 2.0.
- the NCO / functional group ratio is less than 0.5 or more than 2.0, the molecular weight of the obtained base polymer may be low and the cohesive force may be low.
- the cohesive force of the obtained base polymer is low, an appropriate cohesive force can be ensured by adding a cross-linking agent separately.
- the NCO / functional group ratio is larger than 1 and the isocyanate group remains at the terminal of the base polymer, immediately before the completion of the polymerization, from the viewpoint of preventing modification due to the reaction between the isocyanate group and water during storage of the pressure-sensitive adhesive composition. It is preferable to add a functional group-containing monomer to the terminal to modify the terminal.
- the monomer added immediately before the completion of the polymerization may be the same monomer as the functional group-containing monomer used for the polymerization of the base polymer, or may be a different monomer.
- the polymerization reaction of the monomer component used for producing the urethane resin (2) may be carried out in bulk or diluted with a solvent.
- a solvent any suitable solvent can be adopted as long as the effect of the present invention is not impaired.
- examples of such a solvent include ethyl acetate, toluene, n-butyl acetate, n-hexane, cyclohexane, methyl ethyl ketone, methyl isobutyl ketone and the like.
- Toluene or ethyl acetate is preferable as the solvent because the viscosity of the obtained solution of the base polymer can be appropriately adjusted.
- the solvent may be appropriately added during the polymerization reaction in order to adjust the viscosity of the obtained base polymer solution.
- Base film (2) The thickness of the base film (2) is preferably 10 ⁇ m to 300 ⁇ m, more preferably 20 ⁇ m to 200 ⁇ m, still more preferably 30 ⁇ m to 150 ⁇ m, and particularly preferably, in that the effect of the present invention can be more exhibited. Is 35 ⁇ m to 100 ⁇ m, most preferably 35 ⁇ m to 80 ⁇ m.
- the base film (2) includes a resin base film (2a).
- the base film (2) may have a conductive layer (2b).
- the conductive layer (2b) can be arranged between the pressure-sensitive adhesive layer (2) and the resin base film (2a).
- the conductive layer (2b) may be only one layer or two or more layers.
- the base film (2) may have an antistatic layer (2c).
- the antistatic layer (2c) may be disposed between the pressure-sensitive adhesive layer (2) and the resin base film (2a) and / or on the opposite side of the pressure-sensitive adhesive layer (2) of the resin base film (2a). ..
- the antistatic layer (2c) may be only one layer or two or more layers.
- any appropriate thickness can be adopted according to the purpose as long as the effect of the present invention is not impaired.
- Such a thickness is preferably 1 nm to 1000 nm, more preferably 5 nm to 900 nm, still more preferably 7.5 nm to 800 nm, and particularly preferably 10 nm to 700 nm.
- the antistatic layer (2c) may contain any suitable other component as long as the effect of the present invention is not impaired.
- the adhesive tape for an optical member according to the embodiment of the present invention can be produced by any suitable method as long as the effect of the present invention is not impaired.
- the adhesive tape for an optical member according to the embodiment of the present invention includes a release liner (III), an adhesive layer (1), and a base film (a base film (1). 1), the pressure-sensitive adhesive layer (2), and the base film (2) are provided in this order.
- the pressure-sensitive adhesive layer (1) and the base film (1) are constituent elements of the pressure-sensitive adhesive tape (I) for protecting optical members, and the pressure-sensitive adhesive layer (2) and the base film (2) are holding tapes.
- the outermost surface of the adhesive tape (I) for protecting the optical member on the opposite side of the adhesive layer (1), which is a component of (II), and the adhesive layer (2) are directly laminated to form the adhesive.
- the release liner (III) is directly laminated on the exposed surface of the agent layer (1), and two or more of the optical member protective tapes (I) are laminated with a gap on one holding tape (II). The case where it is done will be described.
- One embodiment of the method for manufacturing an adhesive tape for an optical member according to an embodiment of the present invention has a release liner (III), an adhesive layer (1), and a base film (1) in this order.
- the laminated body (X) composed of the constituent elements that is, the laminated body of the release liner (III) and the adhesive tape (I) for protecting the optical member
- the adhesive layer (2), and the base film (2) are arranged in this order.
- Each holding tape (II) composed of these components is manufactured, and then one holding tape (II) is arranged with two or more optical member protective tapes (I) having a gap.
- the surface of the base film (1) of the laminated body (X) and the surface of the adhesive layer (2) of the holding tape (II) are attached so as to be.
- the laminate (X) is, for example, a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition (1), urethane-based pressure-sensitive adhesive composition (1), rubber-based) that forms a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (1).
- a pressure-sensitive adhesive composition (acrylic pressure-sensitive adhesive composition (1), urethane-based pressure-sensitive adhesive composition (1), rubber-based) that forms a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (1).
- At least one selected from the group consisting of the pressure-sensitive adhesive composition (1) and the silicone-based pressure-sensitive adhesive composition (1) is applied onto the base film (1), and if necessary, heated and dried to be necessary.
- the holding tape (II) is, for example, a group consisting of a pressure-sensitive adhesive composition (preferably an acrylic pressure-sensitive adhesive (2) and a urethane-based pressure-sensitive adhesive (2)) for forming a pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer (2). (At least one selected from) is applied onto the base film (2), heated and dried as necessary, and cured as necessary, and the pressure-sensitive adhesive layer is applied on the base film (2). Form (2).
- any suitable separator for example, the release liner (III)
- the optical member protective tape (I) was cut into a width of 40 mm ⁇ a length of 150 mm (tape piece A), a width of 40 mm ⁇ a length of 70 mm (tape piece B), and a width of 40 mm ⁇ a length of 30 mm (tape piece C).
- the holding tape (II) was cut into a width of 50 mm and a length of 180 mm (tape piece D).
- the exposed adhesive surface of the tape piece C is attached to the release-treated surface of the release liner (manufactured by Mitsubishi Chemical Corporation; MRF38) cut into a width of 50 mm and a length of 180 mm, and then has a gap of 5 mm in the length direction.
- the exposed adhesive surface of the tape piece B was attached as described above.
- the release liner of the tape piece D was peeled off, and the exposed adhesive surface was collectively attached to the surfaces of the tape piece B and the tape piece C opposite to the adhesive layer by a hand roller so as not to have air bubbles. Then, an unnecessary outer peripheral portion was cut and removed to obtain a sample F of an adhesive tape for an optical member. This was used as an adhesive tape for an optical member for a peeling liner peeling test.
- a double-sided tape (Nitto Denko Co., Ltd., No. 5000NS) was attached to a glass plate, the release paper was peeled off, and a holding work for measurement was created in which the adhesive surface of the double-sided tape was exposed.
- Sample E of the adhesive tape for optical members was cut to a width of 25 mm, the release liner was peeled off, and the exposed adhesive surface was attached to the adhesive surface side of the double-sided tape of the holding work for measurement.
- the holding work for measurement was attached to the testing machine, and the holding tape was peeled off at a speed of 300 mm / min and a peeling angle of 180 degrees, and the adhesive strength was measured.
- the horizontal axis output at the time of evaluation is the peeling time (indicating the moving distance) and the vertical axis is the force chart. It was designated as A.
- ⁇ Measurement of adhesive strength B> Except for the fact that UV irradiation was carried out before the peeling test, the measurement was carried out in the same manner as the measurement of the adhesive force A, and the adhesive force was determined to be B.
- a UV irradiator (UM-810 manufactured by Nitto Seiki Co., Ltd.) using a high-pressure mercury lamp as a light source was used, and the light intensity was set to 500 mJ / cm 2 .
- a double-sided tape (Nitto Denko Co., Ltd., No. 5000NS) was attached to a glass plate, the release paper was peeled off, and a holding work for measurement was created in which the adhesive surface of the double-sided tape was exposed.
- Sample E of the adhesive tape for optical members was cut to a width of 25 mm, and the base material surface side of the holding tape was attached to the adhesive surface of the double-sided tape of the holding work for measurement.
- the holding work for measurement was attached to the testing machine, and the release liner was peeled off at a speed of 300 mm / min and a peeling angle of 180 degrees, and the peeling force was measured. The result was defined as the adhesive force C.
- haze (%) (Td / Tt) x 100 (Td: diffusion transmittance, Tt: Calculated by total light transmittance).
- TETRAD-C manufactured by Mitsubishi Gas Chemicals Co., Ltd.
- Ethyl acetate was added and mixed in a dispa for 5 minutes. The mixture was statically defoamed until the bubbles of the mixed solution became invisible, and applied to the opposite side of the antistatic treatment layer of the PET film with an applicator so that the thickness after drying was 13 ⁇ m. After application, it is dried at 135 ° C.
- the solvent used was 40 ethyl acetate with respect to the total amount of the monomer so that the amount of the monomer and the thermal polymerization initiator 2,2'-azobis-isobutyronitrile (manufactured by Kishida Chemical Co., Ltd.) was 0.2% by weight based on the total amount of the monomer. It was added so as to be% by weight. Nitrogen substitution was carried out at room temperature for 1 hour while stirring the charged mixture. Then, while stirring under the inflow of nitrogen, the solution temperature in the experimental apparatus was controlled to be 60 ° C. ⁇ 2 ° C. in a water bath, and the temperature was maintained for 12 hours for Examples 1 to 5 and Comparative Example 1. An acrylic polymer solution for holding tape was obtained.
- the solution temperature in the experimental apparatus was controlled to be 60 ° C. ⁇ 2 ° C. by a water bath, and the mixture was held for 12 hours to obtain an intermediate polymer solution.
- toluene was added dropwise to control the temperature during the polymerization.
- ethyl acetate was added dropwise to prevent a rapid increase in viscosity due to hydrogen bonds due to polar groups in the side chains.
- the obtained intermediate polymer solution was cooled to room temperature, the nitrogen introduction tube was changed to an air introduction tube, and air substitution was carried out for 1 hour.
- the mixture was statically defoamed until the bubbles of the mixed solution became invisible, and applied to the corona-treated surface of the PET film with an applicator so that the thickness after drying was 13 ⁇ m. After application, it is dried at 135 ° C for 5 minutes, and the release-treated surface of the release liner (MRF38, manufactured by Mitsubishi Chemical Corporation) is attached to the dried adhesive layer side with a hand roller and aged at 50 ° C for 1 week. , Obtained a holding tape.
- each abbreviation shown in Table 1 means the following.
- MA Methyl acrylate (manufactured by Toagosei Co., Ltd.)
- EA Ethyl acrylate (manufactured by Toagosei Co., Ltd.)
- BA n-butyl acrylate (manufactured by Toagosei Co., Ltd.)
- 2EHA 2-Ethylhexyl acrylate (manufactured by Toagosei Co., Ltd.)
- 2HEA 2-hydroxyethyl acrylate (trade name "Aclicks ⁇ HEA" (manufactured by Toagosei Corporation)
- AA Acrylic acid (manufactured by Toagosei Co., Ltd.)
- LMA Dodecylmethacrylate (trade name: Exepearl "L-MA” manufactured by Kao Corporation)
- HEMA 2-Hydroxyethyl methacrylate (trade name "Acryester HO" manufactured
- the adhesive tape for an optical member according to the embodiment of the present invention can be suitably used for attaching to a foldable member or a rollable member, and as a typical example of the foldable member or the rollable member, an OLED or the like can be used. Can be mentioned.
- Adhesive tape for optical member 100 Adhesive tape for optical member protection (I) 200 Retaining tape (II) 11 Adhesive layer (1) 12 Base film (1) 21 Adhesive layer (2) 22 Base film (2) 30 Release liner (III) L gap
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Abstract
Description
基材フィルム(1)の一方の面に粘着剤層(1)を有する光学部材保護用粘着テープ(I)と、基材フィルム(2)の一方の面に粘着剤層(2)を有する保持テープ(II)とが、該光学部材保護用粘着テープ(I)の該粘着剤層(1)の反対側の最外面と、該粘着剤層(2)とが直接に積層され、該光学部材保護用粘着テープ(I)が有する該粘着剤層(1)の露出面に離型ライナー(III)が直接に積層された、光学部材用粘着テープであって、
1つの該保持テープ(II)に、2つ以上の該光学部材保護用テープ(I)が間隙を有する配置で積層されており、
該粘着剤層(2)が放射線により硬化する放射線硬化型粘着剤から構成され、
放射線により硬化する前の該粘着剤層(2)の、温度23℃、湿度50%RHの環境における、該保持テープ(II)を剥離する際の粘着力Aが1N/25mm以上であり、
高圧水銀ランプによって、保持テープ(II)の粘着剤層(2)の反対側から、500mJ/cm2の光量の紫外線を照射して硬化した後の該粘着剤層(2)の、温度23℃、湿度50%RHの環境における、該保持テープ(II)を剥離する際の粘着力Bが0.2N/25mm以下である。
本発明の実施形態による光学部材用粘着テープは、基材フィルム(1)の一方の面に粘着剤層(1)を有する光学部材保護用粘着テープ(I)と、基材フィルム(2)の一方の面に粘着剤層(2)を有する保持テープ(II)とが、該光学部材保護用粘着テープ(I)の該粘着剤層(1)の反対側の最外面と、該粘着剤層(2)とが直接に積層され、該光学部材保護用粘着テープ(I)が有する該粘着剤層(1)の露出面に離型ライナー(III)が直接に積層された、光学部材用粘着テープであって、1つの該保持テープ(II)に、2つ以上の該光学部材保護用テープ(I)が間隙を有する配置で積層されている。
離型ライナー(III)の厚みとしては、本発明の効果をより発現させ得る点で、好ましくは1μm~300μmであり、より好ましくは10μm~200μmであり、さらに好ましくは20μm~150μmであり、特に好ましくは35μm~100μmであり、最も好ましくは50μm~80μmである。離型ライナー(III)の厚みが上記範囲に比べて小さすぎると、カールの抑制効果が低下するおそれがある。離型ライナー(III)の厚みが上記範囲に比べて大きすぎると、屈曲時に本発明の実施形態による光学部材用粘着テープの浮きが起こりやすくなるなどのおそれがある。
粘着剤層(1)は、本発明の効果を損なわない範囲で、任意の適切な粘着剤層を採用し得る。
アクリル系粘着剤(1)は、アクリル系粘着剤組成物(1)から形成される。
(メタ)アクリル系樹脂(1)の好ましい実施形態1としては、本発明の効果をより発現させ得る点で、好ましくは、(a成分)アルキルエステル部分のアルキル基の炭素数が1~12である(メタ)アクリル酸アルキルエステル、(b成分)OH基を有する(メタ)アクリル酸エステルおよび(メタ)アクリル酸からなる群から選ばれる少なくとも1種、を含む組成物(A)から重合によって形成される(メタ)アクリル系樹脂(A)である。
(メタ)アクリル系樹脂(1)の好ましい実施形態2としては、本発明の効果をより発現させ得る点で、好ましくは、分子内に環状構造を有する(メタ)アクリル酸エステルをモノマー成分として含む組成物(B)から重合によって形成される(メタ)アクリル系樹脂(B)であり、より好ましくは、分子内に環状構造を有する(メタ)アクリル酸エステル、および、直鎖または分岐鎖状のアルキル基を有する(メタ)アクリル酸アルキルエステルをモノマー成分として含む組成物(B)から重合によって形成される(メタ)アクリル系樹脂(B)である。
ウレタン系粘着剤(1)としては、本発明の効果を損なわない範囲で、例えば、特開2017-039859号公報などに記載の公知のウレタン系粘着剤など、任意の適切なウレタン系粘着剤を採用し得る。このようなウレタン系粘着剤(1)としては、例えば、ウレタン系粘着剤組成物から形成されるウレタン系粘着剤であって、該ウレタン系粘着剤組成物が、ウレタンプレポリマーおよびポリオールからなる群から選ばれる少なくとも1種と架橋剤とを含むものである。ウレタン系粘着剤(1)は、1種のみであってもよいし、2種以上であってもよい。ウレタン系粘着剤(1)は、本発明の効果を損なわない範囲で、任意の適切な成分を含有し得る。
ゴム系粘着剤(1)としては、本発明の効果を損なわない範囲で、例えば、特開2015-074771号公報などに記載の公知のゴム系粘着剤など、任意の適切なゴム系粘着剤を採用し得る。ゴム系粘着剤(1)は、1種のみであってもよいし、2種以上であってもよい。ゴム系粘着剤(1)は、本発明の効果を損なわない範囲で、任意の適切な成分を含有し得る。
シリコーン系粘着剤(1)としては、本発明の効果を損なわない範囲で、例えば、特開2014-047280号公報などに記載の公知のシリコーン系粘着剤など、任意の適切なシリコーン系粘着剤を採用し得る。シリコーン系粘着剤(1)は、1種のみであってもよいし、2種以上であってもよい。シリコーン系粘着剤(1)は、本発明の効果を損なわない範囲で、任意の適切な成分を含有し得る。
基材フィルム(1)の厚みとしては、本発明の効果を損なわない範囲で、目的に応じて、任意の適切な厚みを採用し得る。このような厚みとしては、本発明の効果をより発現させ得る点で、好ましくは20μm~500μmであり、より好ましくは20μm~300μmであり、さらに好ましくは20μm~200μmであり、特に好ましくは20μm~100μmであり、最も好ましくは20μm~80μmである。
粘着剤層(2)は、放射線により硬化する放射線硬化型粘着剤から構成される。ここで、放射線硬化型粘着剤とは、放射線により硬化する粘着剤である。
アクリル系粘着剤(2)は、アクリル系粘着剤組成物(2)から形成される。
アクリル系粘着剤組成物(2)の好ましい実施形態1としては、(メタ)アクリル系樹脂(2a)を含み、且つ、放射線重合性官能基を2個以上有する化合物を含む粘着剤組成物である。(メタ)アクリル系樹脂(2a)は、1種のみであってもよいし、2種以上であってもよい。放射線重合性官能基を2個以上有する化合物は、1種のみであってもよいし、2種以上であってもよい。
アクリル系粘着剤組成物(2)の好ましい実施形態2としては、側鎖の一部に放射線重合性官能基を1個以上有する(メタ)アクリル系樹脂(2b)を含む粘着剤組成物である。(メタ)アクリル系樹脂(2b)は、1種のみであってもよいし、2種以上であってもよい。
2-エチルヘキシルアクリレート -70℃
n-ブチルアクリレート -55℃
エチルアクリレート -22℃
メチルアクリレート 8℃
メチルメタクリレート 105℃
シクロヘキシルアクリレート 15℃
シクロヘキシルメタクリレート 66℃
イソボルニルアクリレート 94℃
イソボルニルメタクリレート 180℃
N,N-ジメチルアミノエチルアクリレート 18℃
N,N-ジメチルアミノエチルメタクリレート 18℃
N,N-ジエチルアミノエチルアクリレート 20℃
N,N-ジエチルアミノエチルメタクリレート 20℃
酢酸ビニル 32℃
2-ヒドロキシエチルアクリレート -15℃
スチレン 100℃
アクリル酸 106℃
メタクリル酸 228℃
ウレタン系粘着剤(2)は、ウレタン系粘着剤組成物(2)から形成される。
ウレタン系粘着剤組成物(2)の好ましい実施形態1は、ベースポリマーとしてのウレタン系樹脂(2)、重合性炭素-炭素二重結合を有する化合物、イソシアネート系架橋剤を含む。ウレタン系樹脂(2)は、1種のみであってもよいし、2種以上であってもよい。重合性炭素-炭素二重結合を有する化合物は、1種のみであってもよいし、2種以上であってもよい。イソシアネート系架橋剤は、1種のみであってもよいし、2種以上であってもよい。
実施形態1におけるウレタン系樹脂(2)としては、本発明の効果を損なわない範囲で、任意の適切なウレタン系樹脂を採用し得る。このようなウレタン系樹脂(2)としては、好ましくは、ポリオール(A)と多官能イソシアネート化合物(B)を含有する組成物から形成されるウレタン系樹脂(ワンショット法ウレタン樹脂(2))、または、ウレタンプレポリマー(C)と多官能イソシアネート化合物(B)を含有する組成物から形成されるウレタン系樹脂(プレポリマー法ウレタン樹脂(2))である。
重合性炭素-炭素二重結合を有する化合物としては、好ましくは、2官能以上の重合性炭素-炭素二重結合を有する化合物および重合性炭素-炭素二重結合を有する官能基含有モノマーからなる群から選ばれる少なくとも1種である。
イソシアネート系架橋剤としては、本発明の効果を損なわない範囲で、任意の適切なイソシアネート系架橋剤を採用し得る。このようなイソシアネート系架橋剤としては、例えば、芳香族ジイソシアネート、脂肪族ジイソシアネート、脂環族ジイソシアネート、ならびに、これらのジイソシアネートの二量体および三量体等が挙げられる。
実施形態1においては、ウレタン系粘着剤組成物(2)は、本発明の効果を損なわない範囲で、任意の適切なその他の成分を含んでいてもよい。このようなその他の成分としては、例えば、ウレタン系樹脂以外の樹脂成分、粘着付与剤、無機充填剤、有機充填剤、金属粉、顔料、箔状物、軟化剤、老化防止剤、導電剤、紫外線吸収剤、酸化防止剤、光安定剤、表面潤滑剤、レベリング剤、腐食防止剤、耐熱安定剤、重合禁止剤、滑剤、溶剤、触媒などが挙げられる。その他の成分は、1種のみであってもよいし、2種以上であってもよい。
ウレタン系粘着剤組成物(2)の好ましい実施形態2は、ベースポリマーとしてのウレタン系樹脂(2)が、ポリイソシアネートおよびイソシアネート基と反応し得る官能基を少なくとも2個有するモノマーを含むモノマー組成物を重合して得られ、該ポリイソシアネートおよび該イソシアネート基と反応し得る官能基を少なくとも2個有する該モノマーから選ばれる少なくとも1種が重合性炭素-炭素二重結合を有する。ウレタン系樹脂(2)は、1種のみであってもよいし、2種以上であってもよい。
基材フィルム(2)の厚みは、本発明の効果をより発現させ得る点で、好ましくは10μm~300μmであり、より好ましくは20μm~200μmであり、さらに好ましくは30μm~150μmであり、特に好ましくは35μm~100μmであり、最も好ましくは35μm~80μmである。
本発明の実施形態による光学部材用粘着テープは、本発明の効果を損なわない範囲で、任意の適切な方法によって製造し得る。
光学部材保護用テープ(I)を幅40mm×長さ150mm(テープ片A)、幅40mm×長さ70mm(テープ片B)、幅40mm×長さ30mm(テープ片C)、に切断した。
保持テープ(II)を幅50mm×長さ180mm(テープ片D)に切断した。
〈粘着力A、B、Cの測定用の光学部材用粘着テープの作製〉
テープ片Dの離型ライナーを剥離し、暴露した粘着剤面をテープ片Aの粘着剤層と反対面にハンドローラーで気泡が無いよう貼付した。その後、不要な外周部を切断除去し光学部材用粘着テープのサンプルEを得た。これを粘着力A、B、Cの測定用の光学部材用粘着テープとした。
〈剥離ライナー剥離試験用光学部材用粘着テープの作製〉
テープ片B、テープ片Cの離型ライナーをそれぞれ剥離した。幅50mm×長さ180mmに切断した離型ライナー(三菱ケミカル社製;MRF38)の離型処理面に、テープ片Cの暴露した粘着剤面を貼付、その後、長さ方向に5mmの隙間を有するようにテープ片Bの暴露した粘着剤面を貼付した。テープ片Dの離型ライナーを剥離し、暴露した粘着剤面をテープ片Bおよびテープ片Cの粘着剤層と反対面にハンドローラーで気泡が無いように一括して貼付した。その後、不要な外周部を切断除去し、光学部材用粘着テープのサンプルFを得た。これを剥離ライナー剥離試験用光学部材用粘着テープとした。
ガラス板に、両面テープ(日東電工社製、No.5000NS)を貼付し、離型紙を剥離し、両面テープの粘着剤面を暴露した測定用保持ワークを作成した。光学部材用粘着テープのサンプルEを25mm幅に切断し、離型ライナーを剥離して暴露された粘着剤面を測定用保持ワークの両面テープの粘着剤面側に貼付した。測定用保持ワークを試験機に取り付け、保持テープを速度300mm/分、剥離角度180度で剥離し、粘着力を測定した。評価時に出力された横軸が剥離時間(移動距離を示す)と縦軸が力のチャートにおいて、一番初めの力の極大から測定完了の間での最大値と最小値の平均値を粘着力Aとした。
剥離試験前にUV照射を実施した以外は、粘着力Aの測定と同様に行い、粘着力Bとした。なお、UV照射は、高圧水銀ランプを光源とするUV照射機(日東精機社製、UM-810)を使用し、光量は500mJ/cm2とした。
ガラス板に、両面テープ(日東電工社製、No.5000NS)を貼付し、離型紙を剥離し、両面テープの粘着剤面を暴露した測定用保持ワークを作成した。光学部材用粘着テープのサンプルEを25mm幅に切断し、保持テープの基材面側を測定用保持ワークの両面テープの粘着剤面に貼付した。測定用保持ワークを試験機に取り付け、離型ライナーを速度300mm/分、剥離角度180度で剥離し、剥離力を測定した。その結果を粘着力Cとした。
粘着力Aの評価時に出力された横軸が剥離時間(移動距離を示す)と縦軸が力のチャートにおいて、一番初めの力の極大から測定完了の間での最大値(AMAX)と最小値(AMIN)の値を読み取り、AMAXがAの1.3倍以上またはAMINがAの0.7倍以下となった場合をスティックスリップ有り(不良)、上記範囲内(すなわち、スティックスリップ値が30%以下)であった場合をスティックスリップ無し(良好)とした。
光学部材用粘着テープのサンプルFを幅50mm、長さ方向はテープ片B、テープ片Cのエッジから約5mm内側で切断しサンプルを得た。本サンプルを保持テープ側から両面テープを介してガラスに固定した。テープ片C側の剥離ライナーに略同幅の剥離用テープ(日東電工社製、BT-315)を約10mm貼付し、剥離角度は略180度、速度は3m/分で剥離した。その際に、保持テープと光学部材用粘着テープが剥離した場合を不良、剥離が無かった場合を良好とした。
ヘイズメーターHM-150((株)村上色彩技術研究所製)を使用し、JIS-K-7136に準拠し、ヘイズ(%)=(Td/Tt)×100(Td:拡散透過率、Tt:全光線透過率)により算出した。
(光学部材保護用テープ用アクリルポリマーの作製)
1L丸底セパラブルフラスコ、セパラブルカバー、分液ロート、温度計、窒素導入管、リービッヒ冷却器、バキュームシール、攪拌棒、攪拌翼が装備された重合用実験装置に、アクリル酸n-ブチル(東亜合成株式会社社製)100重量部、アクリル酸(東亜合成株式会社社製)5重量部、熱重合開始剤2,2’-アゾビス-イソブチロニトリル(キシダ化学社製)をモノマー総量に対し0.2重量%となるように、溶媒は、酢酸エチルをモノマー総量に対して40重量%となるように投入した。
投入した混合物を攪拌しながら、常温で窒素置換を1時間実施した。その後、窒素流入下、攪拌しながら、ウオーターバスにて実験装置内溶液温度が60℃±2℃となるように制御しつつ、12時間保持し、光学部材保護用テープ用アクリルポリマーの溶液を得た。
なお、重合途中に、重合中の温度制御のために、トルエンを滴下した。また、側鎖の極性基等による水素結合による急激な粘度上昇を防止するために、酢酸エチルを滴下した。
(光学部材保護用テープの作製)
厚み75μmのPETフィルム(三菱ケミカル社製、T100-75S)に背面帯電防止処理を施した基材フィルムを準備した。上述の光学部材保護用テープ用粘着剤用アクリルポリマーの固形分100重量部に対して、TETRAD―C(三菱瓦斯化学株式会社製)を0.05重量部添加し、固形分が25重量%となるよう酢酸エチルを追加しディスパにて5分間混合した。混合液の気泡が目視出来なくなるまで静置脱泡し、PETフィルムの帯電防止処理層の反対側に乾燥後の厚みが13μmとなるようアプリケーターで塗布した。塗布後135℃で5分間乾燥し、乾燥した粘着剤層側に離型ライナー(三菱ケミカル社製;MRF38)の離型処理面をハンドローラーで貼付し、50℃で1週間エージング処理を施し、光学部材保護用テープを得た。
(実施例1~5および比較例1のための保持テープ用アクリルポリマーの作製)
1L丸底セパラブルフラスコ、セパラブルカバー、分液ロート、温度計、窒素導入管、リービッヒ冷却器、バキュームシール、攪拌棒、攪拌翼が装備された重合用実験装置に、表1に記載のアクリルモノマー、熱重合開始剤2,2’-アゾビス-イソブチロニトリル(キシダ化学社製)をモノマー総量に対し0.2重量%となるように、溶媒は、酢酸エチルをモノマー総量に対して40重量%となるように投入した。
投入した混合物を攪拌しながら、常温で窒素置換を1時間実施した。その後、窒素流入下、攪拌しながら、ウオーターバスにて実験装置内溶液温度が60℃±2℃となるように制御しつつ、12時間保持し、実施例1~5および比較例1のための保持テープ用アクリルポリマー溶液を得た。
なお、重合途中に、重合中の温度制御のために、トルエンを滴下した。また、側鎖の極性基等による水素結合による急激な粘度上昇を防止するために、酢酸エチルを滴下した。
(実施例6のための保持テープ用アクリルポリマーの作製)
1L丸底セパラブルフラスコ、セパラブルカバー、分液ロート、温度計、窒素導入管、リービッヒ冷却器、バキュームシール、攪拌棒、攪拌翼が装備された重合用実験装置に、ドデシルメタクリレート(LMA、商品名エキセパールL-MA;花王社製)100重量部、2-ヒドロキシエチルメタクリレート(HEMA、商品名アクリエステルHO;三菱化学社製)10.2重量部、熱重合開始剤2,2’-アゾビス-イソブチロニトリル(キシダ化学社製)をモノマー総量に対し0.2重量%となるように、溶媒は、トルエンをモノマー総量に対して50重量%となるように投入した。
投入した混合物を攪拌しながら、常温で窒素置換を1時間実施した。その後、窒素流入下、攪拌しながら、ウオーターバスにて実験装置内溶液温度が60℃±2℃となるように制御しつつ、12時間保持し、中間重合物溶液を得た。
なお、重合途中に、重合中の温度制御のために、トルエンを滴下した。また、側鎖の極性基等による水素結合による急激な粘度上昇を防止するために、酢酸エチルを滴下した。
得られた中間重合物溶液を室温まで冷却し、窒素導入管を空気導入管に変え、空気置換を1時間実施した。次いで、メタクリル酸2-イソシアナトエチル(カレンズMOI:昭和電工社製)9.8重量部、ジラウリン酸ジブチルスズIV(和光純薬工業社製)0.01重量部を添加し、空気流入下で50℃に24時間攪拌及び保持して、実施例6のための保持テープ用アクリルポリマーの溶液を得た。
(保持テープの作製)
厚み38μmの片面コロナ処理PETフィルム(三菱ケミカル社製、T100C-38)を準備した。固形分が25重量%となるよう酢酸エチルを追加し、ディスパにて5分間混合した。混合液の気泡が目視出来なくなるまで静置脱泡し、PETフィルムのコロナ処理面に、乾燥後の厚みが13μmとなるようアプリケーターで塗布した。塗布後、135℃で5分間乾燥し、乾燥した粘着剤層側に離型ライナー(三菱ケミカル社製、MRF38)の離型処理面をハンドローラーで貼付し、50℃で1週間エージング処理を施し、保持テープを得た。
なお、表1に示す各略号は下記を意味する。
MA:アクリル酸メチル(東亜合成株式会社社製)
EA:アクリル酸エチル(東亜合成株式会社社製)
BA:アクリル酸n-ブチル(東亜合成株式会社社製)
2EHA:アクリル酸2-エチルヘキシル(東亜合成株式会社社製)
2HEA:アクリル酸2-ヒドロキシエチル(商品名「アクリックスβHEA」(東亜合成株式会社社製)
AA:アクリル酸(東亜合成株式会社社製)
LMA:ドデシルメタクリレート(商品名エキセパール「L-MA」花王株式会社製)
HEMA:2-ヒドロキシエチルメタクリレート(商品名「アクリエステルHO」三菱ケミカル株式会社製)
酢酸エチル:酢酸エチル(昭和電工株式会社製)
トルエン:トルエン(東ソー株式会社製)
AIBN:アゾビスイソブチロニトリル(キシダ化学社製)
エポキシエステル3000MK(共栄社化学株式会社製)
TETRAD―C:多官能エポキシ樹脂(三菱瓦斯化学株式会社製)
ダイアホイルT100C38;ポリエチレンテレフタレートフィルム(三菱ケミカル社製)
ダイアホイルMRF25;剥離ライナー(三菱ケミカル社製)
Omnirad651;光重合開始剤(IGM Resins ITALIA S.r.l社製)
(光学部材用粘着テープの作製)
前述の<各種測定用の光学部材用粘着テープの作製>にしたがって、光学部材用粘着テープを作製した。
結果を表2に示した。
100 光学部材保護用粘着テープ(I)
200 保持テープ(II)
11 粘着剤層(1)
12 基材フィルム(1)
21 粘着剤層(2)
22 基材フィルム(2)
30 離型ライナー(III)
L 間隙
Claims (10)
- 基材フィルム(1)の一方の面に粘着剤層(1)を有する光学部材保護用粘着テープ(I)と、基材フィルム(2)の一方の面に粘着剤層(2)を有する保持テープ(II)とが、該光学部材保護用粘着テープ(I)の該粘着剤層(1)の反対側の最外面と、該粘着剤層(2)とが直接に積層され、該光学部材保護用粘着テープ(I)が有する該粘着剤層(1)の露出面に離型ライナー(III)が直接に積層された、光学部材用粘着テープであって、
1つの該保持テープ(II)に、2つ以上の該光学部材保護用テープ(I)が間隙を有する配置で積層されており、
該粘着剤層(2)が放射線により硬化する放射線硬化型粘着剤から構成され、
放射線により硬化する前の該粘着剤層(2)の、温度23℃、湿度50%RHの環境における、該保持テープ(II)を剥離する際の粘着力Aが1N/25mm以上であり、
高圧水銀ランプによって、保持テープ(II)の粘着剤層(2)の反対側から、500mJ/cm2の光量の紫外線を照射して硬化した後の該粘着剤層(2)の、温度23℃、湿度50%RHの環境における、該保持テープ(II)を剥離する際の粘着力Bが0.2N/25mm以下である、
光学部材用粘着テープ。 - 前記光学部材用粘着テープの前記保持テープ(II)側をガラス板に両面粘着テープで剥がれないように貼り合わせた後、温度23℃、湿度50%RHの環境における、前記離型ライナー(III)を剥離する際の粘着力Cが、前記粘着力Aよりも小さい、請求項1に記載の光学部材用粘着テープ。
- 前記粘着力Aの測定時に得られる変位-力曲線におけるスティックスリップ値が30%以下である、請求項1または2に記載の光学部材用粘着テープ。
- (前記粘着力A/前記粘着力B)>5である、請求項1から3までのいずれかに記載の光学部材用粘着テープ。
- 前記保持テープ(II)のヘイズが10%未満である、請求項1から4までのいずれかに記載の光学部材用粘着テープ。
- 前記粘着剤層(2)を構成する放射線硬化型粘着剤を形成する粘着剤組成物が、(メタ)アクリル系樹脂およびウレタン系樹脂から選ばれる少なくとも1種を含む、請求項1から5までのいずれかに記載の光学部材用粘着テープ。
- 前記粘着剤層(2)を構成する放射線硬化型粘着剤を形成する粘着剤組成物が(メタ)アクリル系樹脂を含み、該粘着剤組成物が、(i)(メタ)アクリル系樹脂(2a)を含み、且つ、放射線重合性官能基を2個以上有する化合物を含む粘着剤組成物、および、(ii)側鎖の一部に放射線重合性官能基を1個以上有する(メタ)アクリル系樹脂(2b)を含む粘着剤組成物、から選ばれる少なくとも1種である、請求項6に記載の光学部材用粘着テープ。
- 前記(メタ)アクリル系樹脂(2a)が、側鎖の炭素数が8以上のアルキル基をアルキルエステル基として有する(メタ)アクリル酸アルキルエステルを0重量%~50重量%で含む単量体組成物を重合して得られる、請求項7に記載の光学部材用粘着テープ。
- 前記(メタ)アクリル系樹脂のFOXの式で算出されるガラス転移温度が260K以下である、請求項6から8までのいずれかに記載の光学部材用粘着テープ。
- 前記粘着剤層(2)を構成する放射線硬化型粘着剤が光重合開始剤を含む、請求項1から9までのいずれかに記載の光学部材用粘着テープ。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4253899A (en) * | 1979-03-08 | 1981-03-03 | Avery International Corporation | Method of making matrix free thin labels |
JPH0420581A (ja) * | 1990-05-14 | 1992-01-24 | Furukawa Electric Co Ltd:The | 表面保護用紫外線硬化性粘着シート及び表面保護方法 |
JP2016157859A (ja) * | 2015-02-25 | 2016-09-01 | 古河電気工業株式会社 | ウエハ加工用テープ |
WO2019130741A1 (ja) * | 2017-12-26 | 2019-07-04 | 日東電工株式会社 | 光学部材用表面保護シート |
JP2019116610A (ja) * | 2017-12-26 | 2019-07-18 | 日東電工株式会社 | 光学部材用表面保護シート |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4151838B2 (ja) * | 2003-01-27 | 2008-09-17 | 日東電工株式会社 | 光学用保護テープ |
JP4318743B1 (ja) * | 2008-10-07 | 2009-08-26 | 昭和高分子株式会社 | 紫外線硬化型再剥離性粘着剤組成物及びこれを用いた粘着シート |
JP2013100447A (ja) * | 2011-10-11 | 2013-05-23 | Oji Holdings Corp | 多層両面粘着シート、積層体、およびタッチパネル付表示装置 |
WO2015198775A1 (ja) * | 2014-06-27 | 2015-12-30 | Dic株式会社 | 紫外線硬化型粘着剤組成物、粘着フィルム、及び、粘着フィルムの製造方法 |
JP6419548B2 (ja) * | 2014-11-27 | 2018-11-07 | 日東電工株式会社 | 表面保護フィルム、表面保護フィルムの製造方法、及び、光学部材 |
KR20170023717A (ko) * | 2015-08-24 | 2017-03-06 | 닛토덴코 가부시키가이샤 | 표면 보호 필름을 갖는 광학 부재 |
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JP6367848B2 (ja) | 2016-02-10 | 2018-08-01 | 株式会社ジャパンディスプレイ | 表示装置及びその製造方法 |
JP2017212038A (ja) | 2016-05-23 | 2017-11-30 | 株式会社ジャパンディスプレイ | 表示装置 |
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JP2019116609A (ja) * | 2017-12-26 | 2019-07-18 | 日東電工株式会社 | 光学部材用表面保護シート |
JP7255241B2 (ja) * | 2018-03-09 | 2023-04-11 | 三菱ケミカル株式会社 | 活性エネルギー線硬化性剥離型粘着剤組成物および剥離型粘着シート |
JP7105633B2 (ja) * | 2018-06-28 | 2022-07-25 | 日東電工株式会社 | 粘着剤組成物、粘着シート、及び、光学部材 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4253899A (en) * | 1979-03-08 | 1981-03-03 | Avery International Corporation | Method of making matrix free thin labels |
JPH0420581A (ja) * | 1990-05-14 | 1992-01-24 | Furukawa Electric Co Ltd:The | 表面保護用紫外線硬化性粘着シート及び表面保護方法 |
JP2016157859A (ja) * | 2015-02-25 | 2016-09-01 | 古河電気工業株式会社 | ウエハ加工用テープ |
WO2019130741A1 (ja) * | 2017-12-26 | 2019-07-04 | 日東電工株式会社 | 光学部材用表面保護シート |
JP2019116610A (ja) * | 2017-12-26 | 2019-07-18 | 日東電工株式会社 | 光学部材用表面保護シート |
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