WO2017110913A1 - Composition d'adhésif à base de caoutchouc, couche d'adhésif à base de caoutchouc, film optique avec couche d'adhésif à base de caoutchouc, élément optique, dispositif d'affichage d'image et procédé de production d'une couche d'adhésif à base de caoutchouc - Google Patents

Composition d'adhésif à base de caoutchouc, couche d'adhésif à base de caoutchouc, film optique avec couche d'adhésif à base de caoutchouc, élément optique, dispositif d'affichage d'image et procédé de production d'une couche d'adhésif à base de caoutchouc Download PDF

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Publication number
WO2017110913A1
WO2017110913A1 PCT/JP2016/088191 JP2016088191W WO2017110913A1 WO 2017110913 A1 WO2017110913 A1 WO 2017110913A1 JP 2016088191 W JP2016088191 W JP 2016088191W WO 2017110913 A1 WO2017110913 A1 WO 2017110913A1
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WO
WIPO (PCT)
Prior art keywords
rubber
sensitive adhesive
adhesive layer
based pressure
film
Prior art date
Application number
PCT/JP2016/088191
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English (en)
Japanese (ja)
Inventor
良平 澤▲崎▼
淳 保井
章典 伊▲崎▼
真理 松本
幸大 宮本
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2016243991A external-priority patent/JP6873682B2/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to SG11201805047QA priority Critical patent/SG11201805047QA/en
Priority to CN201680072809.2A priority patent/CN108368401B/zh
Priority to KR1020187015789A priority patent/KR102580624B1/ko
Publication of WO2017110913A1 publication Critical patent/WO2017110913A1/fr

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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
    • 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
    • C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
    • 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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C09J123/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C09J123/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a rubber-based pressure-sensitive adhesive composition and a rubber-based pressure-sensitive adhesive layer formed from the rubber-based pressure-sensitive adhesive composition.
  • the present invention also relates to an optical film with a rubber-based adhesive layer in which the rubber-based adhesive layer is provided on an optical film, and an optical member including the optical film with a rubber-based adhesive layer.
  • this invention relates to the image display apparatus containing the said optical film with an adhesive layer and / or an optical member.
  • this invention relates to the manufacturing method of a rubber-type adhesive layer.
  • a single-sided protective polarizing film having a protective film only on one side of a polarizer is known as a polarizing film.
  • a single-sided protective polarizing film can be reduced in thickness and weight, there is a problem that the single-sided polarizer is not easily protected by the protective film, and thus is easily deteriorated by moisture or the like.
  • the polarizer may be similarly deteriorated by moisture or the like.
  • an organic EL panel mounted on an organic EL (Electro Luminescence) display device is very vulnerable to moisture and oxygen in the atmosphere, an optical film having a barrier layer and a barrier function is usually provided on the surface of the organic EL panel.
  • the adhesive layer for bonding them is required not to transmit moisture or the like (low moisture permeability).
  • an adhesive encapsulating composition containing a hydrogenated cyclic olefin polymer and a polyisobutylene resin for example, see Patent Document 1
  • an unsaturated bond Adhesive composition having a high barrier property including a conjugated diene-based uncrosslinked rubber, a crosslinked rubber composition containing a hydrogen abstraction type photopolymerization initiator (see, for example, Patent Document 2), and a butyl rubber containing a specific amount of isoprene (for example, see Patent Document 3).
  • Patent Documents 1 to 3 are described as having a moisture barrier property, a gas barrier property, and the like. However, when the pressure-sensitive adhesive layer described in these documents is stored in a high temperature environment, it floats or peels off. In some cases, such a problem occurs.
  • Patent Document 1 does not discuss the crosslinking of rubber-based resins, and Patent Documents 2 and 3 describe that rubber is crosslinked, but those that have unsaturated bonds are crosslinked. It is a cross-linking utilizing an unsaturated bond in rubber.
  • the present invention provides a rubber-based pressure-sensitive adhesive composition that can form a rubber-based pressure-sensitive adhesive layer having low moisture permeability and having high durability capable of suppressing the occurrence of problems such as floating and peeling even in a high temperature environment.
  • the purpose is to provide goods.
  • the present invention also includes a rubber-based pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition, an optical film with a pressure-sensitive adhesive layer provided with the rubber-based pressure-sensitive adhesive layer, and an optical including the optical film with the rubber-based pressure-sensitive adhesive layer.
  • An object is to provide a member.
  • Another object of the present invention is to provide an image display device including at least one selected from the group consisting of the optical film with a rubber-based pressure-sensitive adhesive layer and the optical member. It is another object of the present invention to provide a method for producing the rubber-based pressure-sensitive adhesive layer.
  • the present invention relates to a rubber-based pressure-sensitive adhesive composition
  • a rubber-based pressure-sensitive adhesive composition comprising polyisobutylene and a hydrogen abstraction type photopolymerization initiator.
  • the rubber-based pressure-sensitive adhesive composition of the present invention preferably contains 20 parts by weight or less of a polyfunctional radical polymerizable compound with respect to 100 parts by weight of the polyisobutylene.
  • the polyfunctional radically polymerizable compound is preferably a compound having at least two (meth) acryloyl groups.
  • the compound having at least two (meth) acryloyl groups is a bifunctional (meth) acrylate having two (meth) acryloyl groups and / or a trifunctional (meth) acrylate having three (meth) acryloyl groups. Is preferred.
  • the hydrogen abstraction type photopolymerization initiator is preferably a benzophenone compound.
  • the content of the hydrogen abstraction type photopolymerization initiator is preferably 0.001 to 10 parts by weight with respect to 100 parts by weight of the polyisobutylene.
  • the rubber-based pressure-sensitive adhesive composition of the present invention contains at least one tackifier selected from the group consisting of a tackifier containing a terpene skeleton, a tackifier containing a rosin skeleton, and a hydrogenated product thereof. It is preferable.
  • the rubber-based pressure-sensitive adhesive composition of the present invention can be crosslinked by irradiation with active energy rays.
  • the active energy ray is preferably ultraviolet light.
  • the present invention also relates to a rubber-based pressure-sensitive adhesive layer formed from the rubber-based pressure-sensitive adhesive composition.
  • the present invention also relates to an optical film and an optical film with a rubber-based pressure-sensitive adhesive layer comprising the rubber-based pressure-sensitive adhesive layer provided on the optical film.
  • the optical film is preferably a polarizing film having a protective film on at least one surface of a polarizer.
  • the polarizing film is a single-sided protective polarizing film having a protective film only on one side of the polarizer, and the rubber-based adhesive layer is laminated on the side not having the protective film of the polarizer.
  • the optical film is preferably a brightness enhancement film.
  • the present invention also relates to the rubber-based pressure-sensitive adhesive layer, 40 ° C., 92% R.D. H.
  • the present invention relates to an optical member including a film having a moisture permeability of 1 g / (m 2 ⁇ day) or less.
  • the present invention also relates to an image display device comprising at least one selected from the group consisting of the optical film with a rubber adhesive layer and the optical member.
  • the present invention relates to a method for producing a rubber-based pressure-sensitive adhesive layer, which is obtained by crosslinking the rubber-based pressure-sensitive adhesive composition by irradiation with active energy rays.
  • the rubber-based pressure-sensitive adhesive composition of the present invention contains polyisobutylene containing no double bond in the main chain and a hydrogen abstraction type photopolymerization initiator, a crosslinked structure is introduced by irradiation with active energy rays. It is possible to provide a rubber-based pressure-sensitive adhesive layer (having high durability) that can suppress the occurrence of defects (floating, peeling, etc.) even in a high-temperature environment while maintaining low moisture permeability. Can do.
  • the present invention can provide an optical film with a rubber adhesive layer, an optical member excellent in durability under a high temperature environment and excellent in low moisture permeability, and an image display device excellent in optical reliability. Furthermore, this invention can provide the manufacturing method of the rubber-type adhesive layer which has the said outstanding effect.
  • Rubber-based pressure-sensitive adhesive composition comprises polyisobutylene and a hydrogen abstraction type photopolymerization initiator.
  • polyisobutylene The polyisobutylene (PIB) is a homopolymer of isobutylene, and for example, commercially available products such as OPPANOL manufactured by BASF can be used. In the present invention, since polyisobutylene containing no double bond in the main chain is used, the weather resistance is excellent.
  • the weight average molecular weight (Mw) of the polyisobutylene is preferably 100,000 or more, more preferably 300,000 or more, further preferably 600,000 or more, and particularly preferably 700,000 or more. .
  • the upper limit of the weight average molecular weight is not particularly limited, but is preferably 5 million or less, more preferably 3 million or less, and even more preferably 2 million or less.
  • the content of the polyisobutylene is not particularly limited, but is preferably 50% by weight or more, more preferably 60% by weight or more in the total solid content of the rubber-based pressure-sensitive adhesive composition. It is further preferably 70% by weight or more, more preferably 80% by weight or more, further preferably 85% by weight or more, and particularly preferably 90% by weight or more.
  • the upper limit of the content of polyisobutylene is not particularly limited, and is preferably 99% by weight or less, and more preferably 98% by weight or less. It is preferable that polyisobutylene is contained in the above range because it is excellent in low moisture permeability.
  • the rubber-based pressure-sensitive adhesive composition of the present invention may contain a polymer, an elastomer, or the like other than the polyisobutylene.
  • copolymers of isobutylene and normal butylene for example, copolymers of isobutylene and isoprene (for example, butyl rubbers such as regular butyl rubber, chlorinated butyl rubber, brominated butyl rubber, and partially crosslinked butyl rubber), and vulcanization thereof
  • modified products for example, those modified with a functional group such as a hydroxyl group, a carboxyl group, an amino group, and an epoxy group
  • SEBS styrene-ethylene-butylene-styrene block copolymer
  • SIS Styrene-butadiene-styrene block copolymer
  • SBS Styrene-ethylene-propylene-st
  • a hydrogen abstraction type photopolymerization initiator is an active energy ray that is used to extract hydrogen from the polyisobutylene and react with polyisobutylene without cleavage of the initiator itself. It is something that can make points. By forming the reaction point, the crosslinking reaction of polyisobutylene can be started.
  • the photopolymerization initiator in addition to the hydrogen abstraction type photopolymerization initiator used in the present invention, there are also cleavage type photopolymerization initiators that generate radicals by cleavage of the photopolymerization initiator itself upon irradiation with active energy rays.
  • cleavage type photopolymerization initiators that generate radicals by cleavage of the photopolymerization initiator itself upon irradiation with active energy rays.
  • the main chain of polyisobutylene is cleaved by the photopolymerization initiator in which radicals are generated, and cannot be crosslinked.
  • polyisobutylene can be crosslinked as described above.
  • Examples of the hydrogen abstraction type photopolymerization initiator include acetophenone, benzophenone, methyl-4-phenylbenzophenone o-benzoylbenzoate, 4,4′-dichlorobenzophenone, hydroxybenzophenone, 4,4′-dimethoxybenzophenone, 4,4 '-Dichlorobenzophenone, 4,4'-dimethylbenzophenone, 4-benzoyl-4'-methyl-diphenyl sulfide, acrylated benzophenone, 3,3', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone, Benzophenone compounds such as 3,3′-dimethyl-4-methoxybenzophenone; thioxanes such as 2-isopropylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone Compounds such as 4,
  • the content of the hydrogen abstraction type photopolymerization initiator is preferably 0.001 to 10 parts by weight, more preferably 0.005 to 10 parts by weight with respect to 100 parts by weight of the polyisobutylene. More preferably, it is 0.01 to 10 parts by weight. It is preferable to include a hydrogen abstraction type photopolymerization initiator in the above-mentioned range since the crosslinking reaction can proceed to a target density.
  • a cleavage type photopolymerization initiator may be used together with the hydrogen abstraction type photopolymerization initiator as long as the effects of the present invention are not impaired.
  • the rubber-based pressure-sensitive adhesive composition of the present invention can further contain a polyfunctional radically polymerizable compound.
  • the polyfunctional radically polymerizable compound functions as a crosslinking agent for polyisobutylene.
  • the polyfunctional radical polymerizable compound is a compound having at least two radical polymerizable functional groups having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group.
  • Specific examples of the polyfunctional radical polymerizable compound include, for example, tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,9-nonanediol.
  • the content of the polyfunctional radically polymerizable compound is preferably 20 parts by weight or less, more preferably 15 parts by weight or less, and further preferably 10 parts by weight or less based on 100 parts by weight of the polyisobutylene.
  • the lower limit value of the content of the polyfunctional radical polymerizable compound is not particularly limited. For example, it is preferably 0.1 parts by weight or more with respect to 100 parts by weight of the polyisobutylene, More preferably, it is more than 1 part by weight, and still more preferably 1 part by weight. It is preferable from a viewpoint of durability of the obtained rubber-type adhesive layer that content of a polyfunctional radically polymerizable compound exists in the said range.
  • the molecular weight of the polyfunctional radically polymerizable compound is not particularly limited, but is preferably about 1000 or less, and more preferably about 500 or less.
  • the rubber-based pressure-sensitive adhesive composition of the present invention is at least one selected from the group consisting of a tackifier containing a terpene skeleton, a tackifier containing a rosin skeleton, and a hydrogenated product thereof.
  • a tackifier can be included.
  • tackifier containing the terpene skeleton examples include terpene polymers such as ⁇ -pinene polymer, ⁇ -pinene polymer and dipentene polymer, and modified terpene polymers (phenol-modified, styrene-modified, aromatic). Modified terpene resin and the like).
  • modified terpene resin examples include terpene phenol resin, styrene modified terpene resin, aromatic modified terpene resin, hydrogenated terpene resin (hydrogenated terpene resin) and the like.
  • Examples of the hydrogenated terpene resin herein include a hydride of a terpene polymer and other modified terpene resins and hydrogenated terpene phenol resins.
  • a hydrogenated product of terpene phenol resin is preferable from the viewpoint of compatibility with the rubber-based pressure-sensitive adhesive composition and pressure-sensitive adhesive properties.
  • tackifier containing the rosin skeleton examples include rosin resin, polymerized rosin resin, hydrogenated rosin resin, rosin ester resin, hydrogenated rosin ester resin, rosin phenol resin, and the like.
  • rosin resin polymerized rosin resin
  • hydrogenated rosin resin rosin ester resin
  • hydrogenated rosin ester resin rosin phenol resin
  • gum rosin, wood rosin Unmodified rosin such as tall oil rosin (raw rosin), hydrogenated, disproportionated, polymerized, other chemically modified modified rosin, and derivatives thereof can be used.
  • tackifier for example, commercially available products such as the Clearon series, Polystar series, Superester series, Pencel series, Pine Crystal series, etc. manufactured by Yashara Chemical Co., Ltd. may be used. it can.
  • the hydrogenation may be a partially hydrogenated product that has been partially hydrogenated, and all the double bonds in the compound are fully hydrogenated. It may be a hydrogenated product. In the present invention, a completely hydrogenated product is preferred from the viewpoints of adhesive properties, weather resistance and hue.
  • the tackifier preferably contains a cyclohexanol skeleton from the viewpoint of adhesive properties. Although the detailed principle is unknown, it is thought that the cyclohexanol skeleton is more compatible with the base polymer polyisobutylene than the phenol skeleton.
  • a tackifier containing a cyclohexanol skeleton for example, hydrogenated products such as terpene phenol resin and rosin phenol resin are preferable, and complete hydrogenated products such as terpene phenol resin and rosin phenol resin are more preferable.
  • the softening point (softening temperature) of the tackifier is not particularly limited, but is preferably about 80 ° C. or higher, and more preferably about 100 ° C. or higher. It is preferable that the tackifier has a softening point of 80 ° C. or higher because the tackifier can be kept soft without being softened even at high temperatures.
  • the upper limit value of the softening point of the tackifier is not particularly limited, but if the softening point becomes too high, the molecular weight becomes higher, the compatibility deteriorates, and problems such as whitening may occur.
  • the temperature is preferably about 200 ° C. or less, and preferably about 180 ° C. or less.
  • the softening point of the tackifier resin here is defined as a value measured by a softening point test method (ring ball method) defined in either JIS K5902 or JIS K2207.
  • the weight average molecular weight (Mw) of the tackifier is not particularly limited, but is preferably 50,000 or less, preferably 30,000 or less, and more preferably 10,000 or less, It is more preferably 8000 or less, and particularly preferably 5000 or less.
  • the lower limit of the weight average molecular weight of the tackifier is not particularly limited, but is preferably 500 or more, more preferably 1000 or more, and further preferably 2000 or more. It is preferable that the weight average molecular weight of the tackifier is in the above range because the compatibility with polyisobutylene is good and problems such as whitening do not occur.
  • the addition amount of the tackifier is preferably 40 parts by weight or less, more preferably 30 parts by weight or less, and further preferably 20 parts by weight or less with respect to 100 parts by weight of the polyisobutylene. .
  • the lower limit of the addition amount of the tackifier is not particularly limited, but is preferably 0.1 parts by weight or more, more preferably 1 part by weight or more, and 5 parts by weight or more. More preferably.
  • a tackifier other than the tackifier containing the terpene skeleton and the tackifier containing the rosin skeleton can be added to the rubber-based pressure-sensitive adhesive composition of the present invention.
  • the tackifier include petroleum resin-based tackifiers.
  • the petroleum-based tackifier include aromatic petroleum resins, aliphatic petroleum resins, alicyclic petroleum resins (aliphatic cyclic petroleum resins), aliphatic / aromatic petroleum resins, aliphatic / aliphatic resins. Examples thereof include cyclic petroleum resins, hydrogenated petroleum resins, coumarone resins, coumarone indene resins, and the like.
  • the petroleum resin tackifier can be used within a range that does not impair the effects of the present invention.
  • it can be used in an amount of about 30 parts by weight or less with respect to 100 parts by weight of the polyisobutylene.
  • An organic solvent can be added as a diluent to the rubber-based pressure-sensitive adhesive composition.
  • the diluent is not particularly limited, and examples thereof include toluene, xylene, n-heptane, dimethyl ether, and the like. These may be used alone or in combination of two or more. it can. Among these, toluene is preferable.
  • the addition amount of the diluent is not particularly limited, but it is preferably added to the rubber-based pressure-sensitive adhesive composition at about 50 to 95% by weight, and more preferably about 70 to 90% by weight. When the addition amount of the diluent is within the above range, it is preferable from the viewpoint of coatability to a support or the like.
  • Additives other than those described above can be added to the rubber-based pressure-sensitive adhesive composition of the present invention as long as the effects of the present invention are not impaired.
  • the additive include a softening agent, a crosslinking agent (for example, polyisocyanate, epoxy compound, alkyl etherified melamine compound, etc.), filler, anti-aging agent, ultraviolet absorber and the like.
  • the kind, combination, addition amount, and the like of the additive added to the rubber-based pressure-sensitive adhesive composition can be appropriately set according to the purpose.
  • the content (total amount) of the additive in the rubber-based pressure-sensitive adhesive composition is preferably 30% by weight or less, more preferably 20% by weight or less, and still more preferably 10% by weight or less.
  • Rubber-based pressure-sensitive adhesive layer The rubber-based pressure-sensitive adhesive layer of the present invention is formed from the rubber-based pressure-sensitive adhesive composition. The manufacturing method of the rubber-type adhesive layer of this invention is mentioned later.
  • the thickness of the rubber-based pressure-sensitive adhesive layer of the present invention is not particularly limited and can be appropriately set according to the use, but is preferably 250 ⁇ m or less, more preferably 100 ⁇ m or less, More preferably, it is 50 ⁇ m or less.
  • the lower limit of the thickness of the pressure-sensitive adhesive layer is not particularly limited, but is preferably 1 ⁇ m or more and more preferably 5 ⁇ m or more from the viewpoint of durability.
  • Moisture permeability of rubber SL adhesive layer of the present invention is not particularly limited, is preferably 50g / (m 2 ⁇ day) or less, 30g / (m 2 ⁇ day ) , more preferably less 20 g / (m 2 ⁇ day) or less is more preferable, and 15 g / (m 2 ⁇ day) or less is particularly preferable.
  • the lower limit value of moisture permeability is not particularly limited, but ideally, it is preferable that water vapor is not permeated at all (that is, 0 g / (m 2 ⁇ day)).
  • the moisture permeability of the rubber-based pressure-sensitive adhesive layer is in the above range, when the pressure-sensitive adhesive layer is applied to an optical film such as a polarizing film, it is possible to suppress moisture from being transferred to the optical film, It is preferable because deterioration due to the above can be suppressed.
  • the moisture permeability is 40 ° C. and 92% R.D. when the rubber adhesive layer has a thickness of 50 ⁇ m.
  • the water vapor transmission rate (moisture permeability) under the conditions can be measured by the method described in the examples.
  • the gel fraction of the pressure-sensitive adhesive layer of the present invention is not particularly limited, but is preferably about 10 to 98%, more preferably about 25 to 98%, further preferably about 45 to 90%, and more preferably 60 to It is particularly preferably about 85%. It is preferable for the gel fraction to be in the above range since both durability and adhesive strength can be achieved.
  • the measuring method of a gel fraction can be measured by the method as described in an Example.
  • Method for producing rubber-based pressure-sensitive adhesive layer includes a step of crosslinking the polyisobutylene by irradiating the rubber-based pressure-sensitive adhesive composition with active energy rays.
  • the irradiation with the active energy ray is usually performed by applying the rubber-based pressure-sensitive adhesive composition to various supports and irradiating the obtained coating layer.
  • the active energy ray may be irradiated directly on the coating layer (without bonding other members, etc.), or after bonding various members such as an optical film such as a separator or glass to the coating layer. May be.
  • active energy rays may be irradiated through the optical film or various members, and the optical film or various members are peeled off, and the peeled surface is used. You may irradiate an active energy ray.
  • Various methods are used as a method for applying the rubber-based pressure-sensitive adhesive composition. Specifically, for example, by roll coat, kiss roll coat, gravure coat, reverse coat, roll brush, spray coat, dip roll coat, bar coat, knife coat, air knife coat, curtain coat, lip coat, die coater, etc. Examples thereof include an extrusion coating method.
  • the coating layer of the rubber-based pressure-sensitive adhesive composition is irradiated with active energy rays, but when the rubber-based pressure-sensitive adhesive composition contains an organic solvent as a diluent, It is preferable to remove the solvent and the like by heat drying after application and before irradiation with active energy rays.
  • the heating and drying temperature is not particularly limited, but is preferably about 30 ° C. to 90 ° C., more preferably about 60 ° C. to 80 ° C. from the viewpoint of reducing the residual solvent.
  • As the drying time an appropriate time can be adopted as appropriate.
  • the drying time is preferably about 5 seconds to 20 minutes, more preferably 30 seconds to 10 minutes, and further preferably 1 minute to 8 minutes.
  • Examples of the active energy rays include visible light, ultraviolet rays, and electron beams. Among these, ultraviolet rays are preferable.
  • the irradiation condition of ultraviolet rays is not particularly limited, and can be set to any appropriate condition depending on the composition of the rubber-based pressure-sensitive adhesive composition to be crosslinked.
  • the integrated irradiation light amount is 100 mJ / cm 2. ⁇ 2000 mJ / cm 2 is preferred.
  • a peeled sheet (separator) can be used as the support.
  • constituent material of the separator examples include plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films, porous materials such as paper, cloth, and nonwoven fabric, nets, foam sheets, metal foils, and laminates thereof. Although an appropriate thin leaf body etc. can be mentioned, a plastic film is used suitably from the point which is excellent in surface smoothness.
  • plastic film examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, and ethylene.
  • plastic film examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, and ethylene.
  • -Vinyl acetate copolymer film and the like.
  • the thickness of the separator is usually about 5 to 200 ⁇ m, preferably about 5 to 100 ⁇ m.
  • An antistatic treatment such as a mold can also be performed.
  • the release property from the pressure-sensitive adhesive layer can be further improved by appropriately performing a release treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the separator.
  • the thickness and moisture permeability of the rubber-based pressure-sensitive adhesive layer obtained by the production method of the present invention are as described above.
  • optical film with pressure-sensitive adhesive layer The optical film with a rubber-based pressure-sensitive adhesive layer of the present invention has an optical film and the rubber-based pressure-sensitive adhesive layer provided on the optical film.
  • the rubber-based pressure-sensitive adhesive layer is applied to the optical film by irradiating active energy rays. Can be formed on top.
  • an optical film with a rubber-based pressure-sensitive adhesive layer can be formed by forming a rubber-based pressure-sensitive adhesive layer on a support or the like and transferring the rubber-based pressure-sensitive adhesive layer onto the optical film.
  • the release-treated sheet used in the production of the optical film with a rubber-based pressure-sensitive adhesive layer can be used as it is as a separator for the optical film with a rubber-based pressure-sensitive adhesive layer, and the process can be simplified.
  • optical film those used for forming various image display devices such as a liquid crystal display device are used, and the type thereof is not particularly limited.
  • a polarizing film is mentioned as an optical film.
  • a polarizing film having a protective film on one or both sides of the polarizer is generally used.
  • a single-sided protective polarizing film is preferable from the viewpoint of reducing the thickness.
  • the polarizer is not particularly limited, and various types can be used.
  • polarizers include dichroic iodine and dichroic dyes on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • examples thereof include polyene-based oriented films such as those obtained by adsorbing substances and uniaxially stretched, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer composed of a polyvinyl alcohol film and a dichroic substance such as iodine is preferable.
  • the thickness of these polarizers is not particularly limited, but is generally about 5 to 80 ⁇ m.
  • a polarizer obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching it can be produced, for example, by dyeing polyvinyl alcohol in an aqueous iodine solution and stretching it 3 to 7 times the original length. If necessary, it can be immersed in an aqueous solution of potassium iodide or the like which may contain boric acid, zinc sulfate, zinc chloride or the like. Further, if necessary, the polyvinyl alcohol film may be immersed in water and washed before dyeing.
  • the polyvinyl alcohol film In addition to washing the polyvinyl alcohol film surface with stains and antiblocking agents by washing the polyvinyl alcohol film with water, the polyvinyl alcohol film is also swollen to prevent unevenness such as uneven coloring. is there. Stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be dyed with iodine after stretching. The film can be stretched even in an aqueous solution of boric acid or potassium iodide or in a water bath.
  • a thin polarizer having a thickness of 10 ⁇ m or less.
  • the thickness is preferably 1 to 7 ⁇ m.
  • Such a thin polarizer is preferable in that the thickness unevenness is small, the visibility is excellent, the dimensional change is small, the durability is excellent, and the thickness of the polarizing film can be reduced.
  • the thin polarizer typically, Japanese Patent Application Laid-Open No. 51-069644, Japanese Patent Application Laid-Open No. 2000-338329, International Publication No. 2010/100917 pamphlet, Japanese Patent Application Laid-Open No. 2014-59328, and Japanese Patent Application Laid-Open No. 2014-59328 are disclosed.
  • the thin polarizing film described in 2012-73563 gazette can be mentioned.
  • These thin polarizing films can be obtained by a production method including a step of stretching and dyeing a polyvinyl alcohol-based resin (hereinafter also referred to as PVA-based resin) layer and a stretching resin substrate in the state of a laminate. With this production method, even if the PVA-based resin layer is thin, it can be stretched without problems such as breakage due to stretching by being supported by the stretching resin substrate.
  • PVA-based resin polyvinyl alcohol-based resin
  • the material for forming the protective film provided on one or both sides of the polarizer is preferably a material excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy and the like.
  • polyester polymers such as polyethylene terephthalate and polyethylene naphthalate
  • cellulose polymers such as diacetyl cellulose and triacetyl cellulose
  • acrylic polymers such as polymethyl methacrylate
  • styrene such as polystyrene and acrylonitrile / styrene copolymer (AS resin)
  • AS resin acrylonitrile / styrene copolymer
  • polyethylene, polypropylene, polyolefins having a cyclo or norbornene structure polyolefin polymers such as ethylene / propylene copolymers, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, sulfone polymers , Polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxymethylene polymer, epoxy polymer, or Examples of the polymer that forms the protective film include blends of the polymer.
  • the protective film can also be formed as a cured layer of an acrylic, urethane, acrylic urethane, epoxy, silicone, or other thermosetting or ultraviolet curable resin.
  • a protective film made of the same polymer material may be used on the front and back, or a protective film made of a different polymer material or the like may be used.
  • the thickness of the protective film can be determined as appropriate, but is generally about 1 to 500 ⁇ m from the viewpoints of workability such as strength and handleability, and thin film properties.
  • the polarizer and the protective film are usually in close contact with each other through an aqueous adhesive or the like.
  • the water-based adhesive include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl-based latex, a water-based polyurethane, and a water-based polyester.
  • examples of the adhesive between the polarizer and the protective film include an ultraviolet curable adhesive and an electron beam curable adhesive.
  • the electron beam curable polarizing film adhesive exhibits suitable adhesion to the various protective films.
  • the adhesive used in the present invention can contain a metal compound filler.
  • the surface of the protective film to which the polarizer is not adhered may be subjected to a treatment for the purpose of hard coat layer, antireflection treatment, sticking prevention, diffusion or antiglare.
  • the pressure-sensitive adhesive layer 3 has the protective film 5 of the polarizer 4. It is preferable that it is formed on the non-side (that is, the polarizer 4 side).
  • the polarizer 4 and the pressure-sensitive adhesive layer 3 are not necessarily in contact with each other, but are preferably in contact with each other from the viewpoint that the effects of the present invention can be remarkably exhibited.
  • examples of the optical film other than the polarizing film include a reflection plate, an anti-transmission plate, a retardation plate (including wavelength plates such as 1/2 and 1/4), a viewing angle compensation film, and a brightness enhancement film.
  • a reflection plate an anti-transmission plate
  • a retardation plate including wavelength plates such as 1/2 and 1/4
  • a viewing angle compensation film and a brightness enhancement film.
  • What becomes an optical layer which may be used for formation of a liquid crystal display device etc. is mentioned.
  • a brightness enhancement film can be suitably used as an optical film. These can be used alone as an optical film, or can be laminated on the polarizing film for practical use to use one layer or two or more layers.
  • the pressure-sensitive adhesive layer can be formed after forming an anchor layer or a transparent resin layer on the surface of the optical film or polarizer, or after performing various easy adhesion treatments such as corona treatment and plasma treatment. Moreover, you may perform an easily bonding process on the surface of an adhesive layer.
  • optical member of the present invention includes the optical film with the pressure-sensitive adhesive layer, an optical member including a brightness enhancement film (hereinafter referred to as “first optical member”), the pressure-sensitive adhesive layer, 40 ° C., and 92% R. . H.
  • first optical member an optical member including a brightness enhancement film
  • the optical member (henceforth "the 2nd optical member") containing the film whose water vapor transmission rate is 1 g / (m ⁇ 2 > * day) or less can be mentioned.
  • the first optical member is formed by further laminating a brightness enhancement film via the pressure-sensitive adhesive layer of the optical film with the pressure-sensitive adhesive layer.
  • a polarizing film with an adhesive layer As an optical film with an adhesive layer in a 1st optical member, it is preferable that it is a polarizing film with an adhesive layer.
  • the optical member 10 which has the polarizing film 2, the adhesive layer 3, and the brightness enhancement film 6 can be mentioned.
  • such an optical member 10 may have other layers.
  • FIG. 3 as shown in FIG.
  • the prism sheet 7 can be further laminated through (not shown) or the like.
  • the prism sheet 7 typically has a substrate and a prism portion.
  • a double-sided protective polarizing film may be sufficient.
  • Such an optical member is preferably used as a polarizing plate on the backlight side of the liquid crystal display device.
  • the reflective polarizing plate is a linearly polarized light separation type polarizing plate.
  • Typical examples include grid-type polarizing plates, multilayer thin film laminated polarizing plates of two or more materials having different refractive indexes, vapor-deposited multilayer thin films having different refractive indexes, and birefringent multilayer thin films of two or more materials having different refractive indexes.
  • Laminated body two or more kinds of resin laminates using two or more kinds of resins having a refractive index difference, a polarizing plate that separates by reflecting / transmitting linearly polarized light in an orthogonal axis direction (linearly polarized light separation)
  • a linearly polarized light separation type reflection polarizing plate is preferably used.
  • a reflective polarizing plate for example, those commercially available under the trade name “D-BEF” manufactured by 3M or the product name “Nipox APCF” manufactured by Nitto Denko Corporation may be used.
  • the film having a moisture permeability of 1 g / m 2 ⁇ day or less examples include a barrier layer used in an organic EL device.
  • the barrier layer used in the organic EL device include polymers such as polyethylene trifluoride, poly (ethylene trifluorochloride) (PCTFE), polyimide, polycarbonate, polyethylene terephthalate, alicyclic polyolefin, and ethylene-vinyl alcohol copolymer.
  • Examples thereof include a layer, a laminate thereof, and a polymer layer coated with an inorganic thin film such as silicon oxide, silicon nitride, aluminum oxide, and diamond-like carbon by using a film forming method such as sputtering.
  • An optical member having such a low moisture-permeable film can be suitably used for an organic EL device, and specifically can be used as a sealing member for an organic EL element.
  • Image display device The image display device of the present invention is characterized by including one or more kinds selected from the group consisting of the polarizing film with an adhesive layer and the optical member.
  • Examples of the image display device include a liquid crystal display device and an organic EL display device.
  • the image display device of the present invention only needs to include the optical film or optical member with the pressure-sensitive adhesive layer of the present invention, and other configurations can be the same as those of the conventional image display device.
  • the image display device of the present invention includes the optical film or optical member with the pressure-sensitive adhesive layer, it has high optical reliability.
  • Production Example 1 (Production of Polarizing Film (1))
  • a laminate in which a 9 ⁇ m-thick polyvinyl alcohol (PVA) layer is formed on an amorphous polyethylene terephthalate (PET) substrate is stretched by air-assisted stretching at a stretching temperature of 130 ° C.
  • a colored laminate is produced by dyeing the stretched laminate, and the colored laminate is further stretched in boric acid in water at a stretching temperature of 65 ° C. so that the total stretch ratio becomes 5.94 times.
  • An optical film laminate comprising a 4 ⁇ m thick PVA layer stretched together was produced.
  • the PVA molecules in the PVA layer formed on the amorphous PET substrate by such two-stage stretching are oriented in the higher order, and the iodine adsorbed by the dyeing is oriented in the one direction as the polyiodine ion complex.
  • an optical film laminate including a PVA layer having a thickness of 5 ⁇ m constituting a highly functional polarizing film (polarizer) was produced.
  • polarizing film thickness: 5 ⁇ m
  • protection is performed.
  • a film a (meth) acrylic resin film having a lactone ring structure having a thickness of 20 ⁇ m and subjected to corona treatment
  • drying was performed at 50 ° C. for 5 minutes.
  • the amorphous PET base material was peeled off to produce a piece protective polarizing film (polarizing film (1)) using a thin polarizer.
  • Production Example 2 (Production of Polarizing Film (2)) A 30 ⁇ m-thick polyvinyl alcohol film was stretched up to 3 times while being dyed for 1 minute in an iodine solution of 0.3% concentration at 30 ° C. between rolls having different speed ratios. Thereafter, the total draw ratio was stretched to 6 times while being immersed in an aqueous solution containing 60% at 4% concentration of boric acid and 10% concentration of potassium iodide for 0.5 minutes. Next, after washing by immersing in an aqueous solution containing potassium iodide at 30 ° C. and 1.5% concentration for 10 seconds, drying was performed at 50 ° C. for 4 minutes to obtain a polarizer having a thickness of 12 ⁇ m.
  • Both protective polarizing films were produced by bonding with a polyvinyl alcohol-based adhesive (adhesive layer thickness: 0.1 ⁇ m).
  • the configuration of the polarizing film (2) was hard coat / triacetyl cellulose film / adhesive layer / polarizer / adhesive layer / cycloolefin resin film.
  • an acrylic polymer having a weight average molecular weight (Mw) of 1.1 million.
  • Mw weight average molecular weight
  • An acrylic pressure-sensitive adhesive composition (A) was prepared by adding 0.1 parts by weight (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.).
  • the obtained pressure-sensitive adhesive composition (solution) was applied to the release-treated surface of a 38 ⁇ m-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) with one side peeled with silicone. Formed. Next, the coating layer was dried at 155 ° C. for 3 minutes to form an acrylic pressure-sensitive adhesive layer (A) having a thickness of 20 ⁇ m, and a pressure-sensitive adhesive sheet composed of a polyester film / acrylic pressure-sensitive adhesive layer (A) was produced.
  • a pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet is applied to the protective film of the polarizing film (1) obtained in Production Example 1 (a (meth) acrylic resin film having a lactone ring structure having a thickness of 20 ⁇ m subjected to corona treatment).
  • a polarizing film (3) having a constitution of polyester film (separator) / acrylic pressure-sensitive adhesive layer (A) / protective film / adhesive layer / polarizer was obtained.
  • Example 1 (Preparation of rubber composition) 100 parts by weight of polyisobutylene (trade name: OPPANOL B80, Mw: about 750,000, manufactured by BASF) and tricyclodecane dimethanol diacrylate (trade name: NK ester A-DCP, 2) as a polyfunctional radical polymerizable compound Toluene solution containing 5 parts by weight of functional acrylate, molecular weight: 304 (manufactured by Shin-Nakamura Chemical Co., Ltd.) and 0.5 part of benzophenone (manufactured by Wako Pure Chemical Industries, Ltd.) as a hydrogen abstraction type photopolymerization initiator (The pressure-sensitive adhesive solution was adjusted so that the solid content was 15% by weight to prepare a rubber-based pressure-sensitive adhesive composition (solution).
  • polyisobutylene trade name: OPPANOL B80, Mw: about 750,000, manufactured by BASF
  • NK ester A-DCP tricyclodecane dimethanol diacrylate
  • the obtained rubber-based pressure-sensitive adhesive composition (solution) was applied to a release-treated surface of a 38 ⁇ m-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) with one side being peel-treated with silicone. A layer was formed. Subsequently, the coating layer was dried at 80 ° C. for 3 minutes to form a rubber-based pressure-sensitive adhesive layer, and a pressure-sensitive adhesive sheet having a thickness of 50 ⁇ m was produced.
  • a 38 ⁇ m-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) having one surface peeled with silicone is used.
  • the layers were bonded so that the layers were in contact.
  • the polyester film coated on both surfaces of the rubber pressure-sensitive adhesive layer functions as a release liner (separator).
  • One separator was peeled off, and ultraviolet rays were irradiated at room temperature from the side where the separator was peeled off to obtain a rubber-based pressure-sensitive adhesive sheet comprising a rubber-based pressure-sensitive adhesive layer / separator.
  • the UV irradiation was a light amount of 1000 mJ / cm 2 .
  • Examples 2 to 22, Comparative Examples 1 to 3, 5 A rubber-based pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that the composition and film thickness described in Table 1 were used.
  • Comparative Example 4 (Production of acrylic adhesive sheet)
  • the acrylic pressure-sensitive adhesive composition (A) produced in Production Example 3 was applied to a release-treated surface of a 38 ⁇ m-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) having one surface peeled with silicone. Thus, a coating layer was formed. Next, the coating layer was dried at 120 ° C. for 3 minutes to form a pressure-sensitive adhesive layer, and a pressure-sensitive adhesive sheet having a thickness of 50 ⁇ m was prepared.
  • the adhesive surface of the pressure-sensitive adhesive sheet is a 38 ⁇ m thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Resin Co., Ltd.) having one surface peeled with silicone, and the peel-treated surface and the pressure-sensitive adhesive layer are in contact with each other.
  • an acrylic pressure-sensitive adhesive sheet was obtained.
  • the polyester film coated on both sides of the pressure-sensitive adhesive layer functions as a release liner (separator).
  • ⁇ Durability 1 (polarizing film (1))>
  • the polarizing film (1) obtained in Production Example 1 and the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples were laminated such that the polarizer of the polarizing film (1) and the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet were in contact with each other.
  • a polarizing film with an adhesive layer was obtained.
  • the release liner of the pressure-sensitive adhesive layer was left as a separator.
  • the structure of the obtained polarizing film with an adhesive layer was protective film / adhesive layer / polarizer / adhesive layer / separator.
  • the separator of the obtained polarizing film with an adhesive layer is peeled off, the test piece is bonded to a glass plate, and the state after being put in an environment of 95 ° C. for 500 hours is observed visually or using a magnifying glass (20 times). did. Evaluation was performed according to the following evaluation criteria. A: Even when confirmed with a loupe, no defects (foaming, peeling, etc.) occurred. ⁇ : Although a defect could not be confirmed by visual observation, some defect occurred to the extent that there was no problem in use when confirmed with a loupe. X: Defects could be confirmed visually.
  • ⁇ Durability 2 (polarizing film (2))>
  • the polarizing film (2) obtained in Production Example 2 and the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples are respectively in contact with the cycloolefin resin film of the polarizing film (2) and the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet.
  • a polarizing film with a pressure-sensitive adhesive layer was obtained.
  • the release liner of the pressure-sensitive adhesive layer was left as a separator.
  • the structure of the obtained polarizing film with an adhesive layer was hard coat / triacetyl cellulose film / adhesive layer / polarizer / adhesive layer / cycloolefin resin film / adhesive layer / separator.
  • ⁇ Durability 3 (Polarizing film (3))>
  • the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet obtained in Examples and Comparative Examples and a 20 ⁇ m linearly polarized light separating film (trade name: D-BEF, manufactured by 3M Company) were bonded to produce a brightness enhancement film with a pressure-sensitive adhesive layer.
  • the brightness-enhancing film with the pressure-sensitive adhesive layer and the polarizing film (3) obtained in Production Example 3 are the same as the pressure-sensitive adhesive layer of the brightness-enhancing film with the pressure-sensitive adhesive layer and the polarizing film (3) obtained in Production Example 3. It laminated
  • the release liner of the pressure-sensitive adhesive layer was left as a separator.
  • the composition of the obtained polarizing film with a pressure-sensitive adhesive layer was as follows: polyester film (separator) / acrylic pressure-sensitive adhesive layer (A) / protective film / adhesive layer / polarizer / Example, pressure-sensitive adhesive layer obtained in Comparative Example / It was a brightness enhancement film.
  • the polarizing film was laminated on the adherend (glass plate) in the durability test via the pressure-sensitive adhesive layers obtained in Examples and Comparative Examples, respectively.
  • the adherend (glass plate) and the polarizing film of the durability test were laminated through the acrylic pressure-sensitive adhesive layer (A) obtained in Production Example 3. .
  • ⁇ Gel fraction> The total weight of the kite string and a porous membrane made of tetrafluoroethylene resin having a pore diameter of 0.2 ⁇ m (trade name: NITOFLON NTF1122, manufactured by Nitto Denko Corporation) was measured in advance (W a (mg)). About 1 g of the pressure-sensitive adhesive layer was collected from the obtained pressure-sensitive adhesive sheet, wrapped in a purse-like shape in the porous membrane, and the mouth was tied with a string, and the weight of the wrap was measured (W b (mg)). This packet was placed in a 50-mL screw bottle, and the screw bottle was filled with toluene.
  • a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer thickness of 50 ⁇ m was formed according to the method described in the examples.
  • One release liner of the pressure-sensitive adhesive sheet was peeled off to expose the pressure-sensitive adhesive surface, and the pressure-sensitive adhesive sheet was bonded to a triacetyl cellulose film (TAC film, thickness: 25 ⁇ m, manufactured by Konica Minolta Co., Ltd.). Then, the other release liner was peeled off to obtain a measurement sample.
  • TAC film triacetyl cellulose film, thickness: 25 ⁇ m, manufactured by Konica Minolta Co., Ltd.
  • A-DCP Tricyclodecane dimethanol diacrylate (trade name: NK ester A-DCP, bifunctional acrylate, molecular weight: 304, manufactured by Shin-Nakamura Chemical Co., Ltd.)
  • DCP Tricyclodecane dimethanol dimethacrylate (trade name: NK ester DCP, bifunctional methacrylate, molecular weight: 332, manufactured by Shin-Nakamura Chemical Co., Ltd.)
  • A-TMPTA trimethylolpropane triacrylate (trade name: NK ester A-TMPT, trifunctional acrylate, molecular weight: 296, manufactured by Shin-Nakamura Chemical Co., Ltd.)
  • Benzophenone Hydrogen abstraction type photopolymerization initiator Irgacure 184: Cleavage type photoinitiator, 1-hydroxycyclohexyl pheny

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention concerne une composition d'adhésif à base de caoutchouc qui contient un polyisobutylène et un initiateur de photopolymérisation de type à transfert d'hydrogène. Cette composition d'adhésif à base de caoutchouc est capable de former une couche d'adhésif à base de caoutchouc très durable et apte à supprimer la formation de défauts tels que la séparation et la perte d'adhérence dans un environnement à haute température, tout en ayant une faible perméabilité à la vapeur d'eau.
PCT/JP2016/088191 2015-12-25 2016-12-21 Composition d'adhésif à base de caoutchouc, couche d'adhésif à base de caoutchouc, film optique avec couche d'adhésif à base de caoutchouc, élément optique, dispositif d'affichage d'image et procédé de production d'une couche d'adhésif à base de caoutchouc WO2017110913A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SG11201805047QA SG11201805047QA (en) 2015-12-25 2016-12-21 Rubber-based pressure-sensitive-adhesive composition, rubber-based pressure-sensitive-adhesive layer, rubber-based pressure-sensitive-adhesive layer attached optical film, optical member, image display device, and method for producing rubber-based pressure-sensitive-adhesive layer
CN201680072809.2A CN108368401B (zh) 2015-12-25 2016-12-21 橡胶类粘合剂组合物、橡胶类粘合剂层、带橡胶类粘合剂层的光学膜、光学构件、图像显示装置、以及橡胶类粘合剂层的制造方法
KR1020187015789A KR102580624B1 (ko) 2015-12-25 2016-12-21 고무계 점착제 조성물, 고무계 점착제층, 고무계 점착제층을 갖는 광학 필름, 광학 부재, 화상 표시 장치 및 고무계 점착제층의 제조 방법

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JP2016243991A JP6873682B2 (ja) 2015-12-25 2016-12-16 ゴム系粘着剤組成物、ゴム系粘着剤層、ゴム系粘着剤層付光学フィルム、光学部材、画像表示装置、及びゴム系粘着剤層の製造方法
JP2016-243991 2016-12-16

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JP2010009027A (ja) * 2008-05-27 2010-01-14 Nitto Denko Corp 粘着型偏光板、画像表示装置およびそれらの製造方法
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JP2010009027A (ja) * 2008-05-27 2010-01-14 Nitto Denko Corp 粘着型偏光板、画像表示装置およびそれらの製造方法
JP2010260933A (ja) * 2009-04-30 2010-11-18 Bridgestone Corp 免震構造体用ゴム組成物
JP2013022920A (ja) * 2011-07-25 2013-02-04 Lintec Corp ガスバリアフィルム積層体および電子部材
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KR20200098976A (ko) * 2019-02-13 2020-08-21 서울대학교산학협력단 내열성이 향상된 유사-상호침투 중합체 네트워크 구조의 고무 점착 필름, 이의 제조방법 및 이를 포함하는 점착 필름
KR102208996B1 (ko) 2019-02-13 2021-01-28 서울대학교산학협력단 내열성이 향상된 유사-상호침투 중합체 네트워크 구조의 고무 점착 필름, 이의 제조방법 및 이를 포함하는 점착 필름

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