WO2017047703A1 - Composition adhésive, couche adhésive, film optique ayant une couche adhésive fixée, élément optique, et dispositif d'affichage d'image - Google Patents

Composition adhésive, couche adhésive, film optique ayant une couche adhésive fixée, élément optique, et dispositif d'affichage d'image Download PDF

Info

Publication number
WO2017047703A1
WO2017047703A1 PCT/JP2016/077289 JP2016077289W WO2017047703A1 WO 2017047703 A1 WO2017047703 A1 WO 2017047703A1 JP 2016077289 W JP2016077289 W JP 2016077289W WO 2017047703 A1 WO2017047703 A1 WO 2017047703A1
Authority
WO
WIPO (PCT)
Prior art keywords
tackifier
pressure
sensitive adhesive
adhesive layer
film
Prior art date
Application number
PCT/JP2016/077289
Other languages
English (en)
Japanese (ja)
Inventor
良平 澤▲崎▼
淳 保井
章典 伊▲崎▼
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 JP2016177677A external-priority patent/JP6725373B2/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020187005240A priority Critical patent/KR102315599B1/ko
Priority to CN201680052402.3A priority patent/CN108026423B/zh
Publication of WO2017047703A1 publication Critical patent/WO2017047703A1/fr

Links

Images

Classifications

    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber 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
    • 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
    • C09J7/10—Adhesives in the form of films or foils without carriers
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • 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
    • 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
    • C09J125/00—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 an aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
    • C09J125/02—Homopolymers or copolymers of hydrocarbons
    • C09J125/04—Homopolymers or copolymers of styrene
    • C09J125/08—Copolymers of styrene
    • 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
    • C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
    • C09J193/04—Rosin
    • 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 pressure-sensitive adhesive composition and a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition. Moreover, this invention relates to the optical member containing the said optical film with an adhesive layer which provided the said adhesive layer in the optical film, and the said optical film with an adhesive layer. Furthermore, this invention relates to the image display apparatus containing the said optical film with an adhesive layer and / or an optical member.
  • a single-sided protective polarizing film having a transparent 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).
  • a low moisture-permeable pressure-sensitive adhesive layer for example, two types of isobutylene resins having different weight average molecular weights and a pressure-sensitive adhesive composition containing a hydrogenated petroleum resin having a specific softening point are included at a specific blending ratio.
  • An adhesive composition is known (see, for example, Patent Document 1).
  • the adhesive sealing composition which has the hydrogenated cyclic olefin type polymer and the polyisobutylene resin which has a specific weight average molecular weight is disclosed (for example, refer patent document 2).
  • the present invention provides a pressure-sensitive adhesive composition that can form a pressure-sensitive adhesive layer having low moisture permeability and having high durability that can suppress the occurrence of problems such as floating and peeling even in a high-temperature environment.
  • this invention provides the optical member containing the adhesive layer formed from the said adhesive composition, the optical film with an adhesive layer provided with the said adhesive layer, and the said optical film with an adhesive layer.
  • Objective. It is another object of the present invention to provide an image display device including at least one selected from the group consisting of the optical film with an adhesive layer and the optical member.
  • the present invention is a pressure-sensitive adhesive composition containing a rubber-based polymer (A) and a tackifier (B),
  • the rubber polymer (A) includes at least one rubber polymer selected from the group consisting of a styrene thermoplastic elastomer (A1) and an isobutylene polymer (A2) having a weight average molecular weight of 500,000 or more.
  • the tackifier (B) is a natural product-based tackifier (B1), a petroleum resin-based tackifier (B2).
  • the tackifier (B) is selected from the group consisting of a natural product-based tackifier (B1) and hydrogenated products thereof. It is related with the adhesive composition characterized by including the at least 1 sort (s) of tackifier selected.
  • the tackifier (B) contains a natural product tackifier (B1).
  • a natural product tackifier (B1) 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 can be used.
  • the tackifier (B) is a hydrogenated product.
  • the softening point of the tackifier (B) is 100 ° C. or higher.
  • the natural product-based tackifier (B1) includes a cyclohexanol skeleton.
  • the content of the tackifier (B) is 1 part by weight or more with respect to 100 parts by weight of the rubber-based polymer (A).
  • the pressure-sensitive adhesive composition is further selected from the group consisting of a polyisobutylene compound (C1) having a weight average molecular weight of 50,000 or less and a polyisoprene compound (C2) having a weight average molecular weight of 50,000 or less. It is preferable to include at least one softener (C).
  • the content of the softening agent (C) is 1 part by weight or more with respect to 100 parts by weight of the rubber-based polymer (A).
  • the present invention also relates to a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition.
  • the present invention also relates to an optical film with an adhesive layer, characterized by comprising an optical film and the adhesive layer provided on the optical film.
  • the optical film is preferably a polarizing film having a transparent protective film on at least one surface of the polarizer.
  • the polarizing film is preferably a single-sided protective polarizing film having a transparent protective film only on one side of the polarizer, and the pressure-sensitive adhesive layer is preferably laminated on the side of the polarizer that does not have a transparent protective film.
  • the optical film may be a brightness enhancement film.
  • the present invention also provides an optical member comprising the optical film with the pressure-sensitive adhesive layer and a brightness enhancement film, the 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 relates to an image display device comprising at least one selected from the group consisting of the optical film with an adhesive layer and the optical member.
  • the pressure-sensitive adhesive composition of the present invention has a problem (floating or peeling) even in a high temperature environment while maintaining low moisture permeability by adding a specific tackifier (B) to a specific rubber polymer (A). Etc.) can be suppressed (high durability).
  • the present invention can provide an optical film with an adhesive layer, an optical member, and an image display device excellent in optical reliability, which are excellent in durability under a high temperature environment and excellent in low moisture permeability.
  • the pressure-sensitive adhesive composition of the present invention contains a rubber-based polymer (A) and a tackifier (B),
  • the rubber polymer (A) includes at least one rubber polymer selected from the group consisting of a styrene thermoplastic elastomer (A1) and an isobutylene polymer (A2) having a weight average molecular weight of 500,000 or more.
  • the tackifier (B) is a natural product-based tackifier (B1), a petroleum resin-based tackifier (B2).
  • the tackifier (B) is selected from the group consisting of a natural product-based tackifier (B1) and hydrogenated products thereof. It contains at least one selected tackifier.
  • the rubber-based polymer (A) used in the present invention is a polymer that exhibits rubber elasticity in a temperature range near room temperature.
  • the styrene-based thermoplastic elastomer (A1) and the isobutylene-based polymer (A2) having a weight average molecular weight (Mw) of 500,000 or more (hereinafter sometimes simply referred to as “isobutylene-based polymer (A2)”)
  • styrenic thermoplastic elastomer (A1) examples include styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-isoprene-styrene block copolymer (SIS), and styrene-butadiene-styrene block copolymer.
  • SEBS styrene-ethylene-butylene-styrene block copolymer
  • SIS styrene-isoprene-styrene block copolymer
  • styrene-butadiene-styrene block copolymer examples include styrene-butadiene-styrene block copolymer.
  • SBS Styrene-ethylene-propylene-styrene block copolymer
  • SIS Styrene-ethylene-propylene block copolymer
  • SEP styrene-isoprene block copolymer
  • SIBS styrene-isobutylene-styrene block copolymer
  • SBR styrene-butadiene rubber
  • SEPS styrene-ethylene-propylene-styrene block copolymers
  • SIBS styrene-isobutylene-styrene block copolymer
  • thermoplastic elastomer (A1) for example, commercially available products such as SEPTON and HYBRAR manufactured by Kuraray Co., Ltd., Tuftec manufactured by Asahi Kasei Chemicals Co., Ltd., and SIBSTAR manufactured by Kaneka Co., Ltd. can be used.
  • the weight average molecular weight of the styrenic thermoplastic elastomer (A1) is not particularly limited, but is preferably about 50,000 to 500,000, more preferably about 50,000 to 300,000. More preferably, it is about 50,000 to 250,000. It is preferable that the weight average molecular weight of the styrene-based thermoplastic elastomer (A1) is in the above range because both the cohesive force and viscoelasticity of the polymer can be achieved.
  • the styrene content in the styrenic thermoplastic elastomer (A1) is not particularly limited, but is preferably about 5 to 70% by weight, for example, and more preferably about 5 to 40% by weight. Preferably, it is about 10 to 20% by weight.
  • the styrene content in the styrene-based thermoplastic elastomer (A1) is in the above range, it is preferable because viscoelasticity by the soft segment can be secured while maintaining the cohesive force by the styrene site.
  • Examples of the isobutylene polymer (A2) include those containing isobutylene as a constituent monomer and having a weight average molecular weight of 500,000 or more.
  • the isobutylene polymer (A2) may be a homopolymer of isobutylene (polyisobutylene, PIB), and a copolymer having isobutylene as a main monomer (that is, a copolymer in which isobutylene is copolymerized in a proportion exceeding 50 mol%).
  • Examples of such a copolymer include a copolymer of isobutylene and normal butylene, a copolymer of isobutylene and isoprene (for example, butyl rubbers such as regular butyl rubber, chlorinated butyl rubber, brominated butyl rubber, and partially crosslinked butyl rubber), These vulcanizates and 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) can be used.
  • polyisobutylene (PIB) is preferable because it does not contain a double bond in the main chain and is excellent in weather resistance.
  • isobutylene polymer (A2) for example, commercially available products such as OPPANOL manufactured by BASF can be used.
  • the weight average molecular weight of the isobutylene polymer (A2) is 500,000 or more, preferably 600,000 or more, and more 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.
  • content of the said rubber-type polymer (A) is not specifically limited, It is preferable that it is 30 weight% or more in the total solid of an adhesive composition, and it is more preferable that it is 40 weight% or more. Preferably, it is more preferably 50% by weight or more, and particularly preferably 60% by weight or more.
  • the upper limit of the content of the rubber-based polymer (A) is not particularly limited, and is preferably 95% by weight or less, and more preferably 90% by weight or less.
  • the content thereof is preferably 30% by weight or more in the total solid content of the pressure-sensitive adhesive composition, 35 More preferably, it is more than 40% by weight.
  • the upper limit is not particularly limited, but is preferably about 90% by weight or less, and more preferably about 70% by weight or less.
  • the content thereof is preferably 60% by weight or more in the total solid content of the pressure-sensitive adhesive composition, 70% by weight. % Or more, more preferably 80% by weight or more.
  • the upper limit value is not particularly limited, but is preferably about 98% by weight or less, and more preferably about 90% by weight or less.
  • the pressure-sensitive adhesive composition of the present invention can also contain a rubber polymer other than the rubber polymer (A).
  • a rubber polymer other than the rubber polymer (A) Specifically, butyl rubber (IIR), butadiene rubber (BR), acrylonitrile-butadiene rubber (NBR), EPR (binary ethylene-propylene rubber), EPT (ternary ethylene-propylene rubber), acrylic rubber, urethane
  • examples thereof include rubber, polyurethane-based thermoplastic elastomers; polyester-based thermoplastic elastomers; blend-based thermoplastic elastomers such as polymer blends of polypropylene and EPT (ternary ethylene-propylene rubber).
  • Tackifier (B) examples include a natural product-based tackifier (B1), a petroleum resin-based tackifier (B2), and hydrogenated products thereof. These tackifiers (B) are selected according to the rubber polymer (A). That is, when the styrene thermoplastic elastomer (A1) is used, as the tackifier (B), a natural product tackifier (B1), a petroleum resin tackifier (B2), and hydrogenation thereof. At least one selected from the group consisting of things is used.
  • the tackifier (B) is at least one selected from the group consisting of a natural product tackifier (B1) and hydrogenated products thereof. Is used.
  • the pressure-sensitive adhesive composition of the present invention has a pressure-sensitive adhesive layer having high adhesion to various adherends and having high durability even in a high-temperature environment. Can be formed.
  • the rubber-based polymer (A) is used, as the tackifier (B), a natural product-based tackifier (B1) containing a hydroxyl group and having high moisture permeability, such as terpene phenol. ) Can be used. That is, in the present invention, by using a specific rubber-based polymer (A) and a specific tackifier (B), durability in a high temperature environment can be improved while maintaining low moisture permeability. It is.
  • Examples of the natural product-based tackifier (B1) include tackifiers containing a terpene skeleton, tackifiers containing a rosin skeleton, and hydrogenated products thereof.
  • the description relating to the natural product-based tackifier (B1) is a concept including the hydrogenated product.
  • tackifiers containing a terpene skeleton include terpene polymers such as ⁇ -pinene polymers, ⁇ -pinene polymers, and dipentene polymers, and modified terpene polymers (phenol-modified, styrene-modified, aromatic-modified). Modified terpene resin, etc.).
  • modified terpene resin 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 hydrogenated products of terpene polymers and other modified terpene resins and hydrogenated products of terpene phenol resins. Among these, from the viewpoint of compatibility with the rubber-based pressure-sensitive adhesive and pressure-sensitive adhesive properties, hydrogenated products of terpene phenol resins are preferable.
  • 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.
  • Examples of the petroleum resin tackifier (B2) include aromatic petroleum resins, aliphatic petroleum resins, alicyclic petroleum resins (aliphatic cyclic petroleum resins), aliphatic / aromatic petroleum resins, Aliphatic / alicyclic petroleum resins, hydrogenated petroleum resins, coumarone resins, coumarone indene resins and the like can be mentioned.
  • aromatic petroleum resin examples include vinyl group-containing aromatic hydrocarbons having 8 to 10 carbon atoms (styrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, ⁇ -methylstyrene, ⁇ -methylstyrene, indene, methylindene, etc.) are used alone or in combination of two or more.
  • aromatic petroleum resins (so-called “C9 petroleum resins”) obtained from fractions such as vinyl toluene and indene (so-called “C9 petroleum fractions”) are preferable.
  • aliphatic petroleum resin examples include olefins having 4 to 5 carbon atoms and dienes (olefins such as butene-1, isobutylene and pentene-1; butadiene, piperylene (1,3-pentadiene), isoprene and the like. Examples thereof include polymers in which only one type or two or more types of diene are used.
  • aliphatic petroleum resins so-called “C4 petroleum resins” and “C5 series” obtained from fractions such as butadiene, piperylene and isoprene (so-called “C4 petroleum fraction”, “C5 petroleum fraction”, etc.) Petroleum resin "etc. are preferred.
  • alicyclic petroleum resin for example, an alicyclic polymer obtained after cyclizing and dimerizing an aliphatic petroleum resin (so-called “C4 petroleum resin”, “C5 petroleum resin” or the like).
  • a hydrocarbon polymer a polymer of a cyclic diene compound (cyclopentadiene, dicyclopentadiene, ethylidene norbornene, dipentene, ethylidenebicycloheptene, vinylcycloheptene, tetrahydroindene, vinylcyclohexene, limonene, or the like)
  • aromatic hydrocarbon resins and alicyclic hydrocarbon resins obtained by hydrogenating the aromatic rings of the following aliphatic / aromatic petroleum resins.
  • examples of the aliphatic / aromatic petroleum resin include styrene-olefin copolymers.
  • examples of the aliphatic / aromatic petroleum resin include so-called “C5 / C9 copolymer petroleum resin”.
  • the description relating to the petroleum resin-based tackifier (B2) is a concept including the hydrogenated product.
  • examples of the natural product-based tackifier (B1) include: Clearon series, Polystar series, Yashara Chemical Co., Ltd., Superester series, Arakawa Chemical Co., Ltd. Cell series, pine crystal series, etc. are mentioned, and as the petroleum resin-based tackifier (B2), for example, commercially available products such as Alcon series manufactured by Arakawa Chemical Industries, Ltd. can be used.
  • the hydrogenation may be a partially hydrogenated product that is partially hydrogenated, and all double bonds in the compound are hydrogenated. It may be a complete hydrogenation product. In the present invention, a completely hydrogenated product is preferred from the viewpoints of adhesive properties, weather resistance and hue.
  • a natural product tackifier (B1) can be suitably used as the tackifier (B).
  • the natural product-based tackifier (B1) preferably contains a cyclohexanol skeleton from the viewpoint of adhesive properties. Although the detailed principle is unknown, it is considered that the cyclohexanol skeleton is more compatible with the rubber polymer as the base polymer 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 (B) 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 softening point of the tackifier (B) is 80 ° C. or higher because the tackifier can be maintained without being softened even at high temperatures.
  • the upper limit value of the softening point of the tackifier (B) 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. Therefore, for example, it is preferably about 200 ° C. or lower, and preferably about 180 ° C. or lower.
  • 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 of the tackifier (B) is not particularly limited, but is preferably 50,000 or less, preferably 30,000 or less, 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 (B) is not particularly limited, but is preferably 500 or more, more preferably 1000 or more, and further preferably 2000 or more. preferable. It is preferable that the weight-average molecular weight of the tackifier (B) is in the above range since compatibility with the rubber polymer is good and problems such as whitening do not occur.
  • the amount of the tackifier (B) added is preferably 250 parts by weight or less, more preferably 200 parts by weight or less, based on 100 parts by weight of the rubber-based polymer (A). It is preferably 150 parts by weight or less.
  • the amount of the natural product-based tackifier (B1) added is 100 parts by weight of the rubber-based polymer (A).
  • the amount is preferably 100 parts by weight or less, more preferably 85 parts by weight or less, further preferably 50 parts by weight or less, and particularly preferably 45 parts by weight or less.
  • the lower limit of the addition amount of the tackifier (B) is not particularly limited, but is preferably 1 part by weight or more, and more preferably 5 parts by weight or more.
  • the rubber-based polymer (A) contains a styrene-based thermoplastic elastomer (A1)
  • a natural product-based tackifier (B1) and / or a petroleum resin-based tackifier (B2) is used as the tackifier (B).
  • the amount of the natural product-based tackifier (B1) added is preferably 100 parts by weight or less and more preferably 85 parts by weight or less with respect to 100 parts by weight of the styrene-based thermoplastic elastomer (A1).
  • the amount is preferably 70 parts by weight or less, and more preferably 45 parts by weight or less.
  • the lower limit of the amount of the natural product-based tackifier (B1) added is not particularly limited, but is preferably 0.5 parts by weight or more, and more preferably 1 part by weight or more. The amount is more preferably 10 parts by weight or more, and particularly preferably 20 parts by weight or more.
  • the added amount of the natural product-based tackifier (B1) may be 0 parts by weight. .
  • the addition amount of the petroleum resin-based tackifier (B2) is preferably 150 parts by weight or less and 100 parts by weight or less with respect to 100 parts by weight of the styrene-based thermoplastic elastomer (A1). More preferably, it is 70 parts by weight or less, further preferably 50 parts by weight, and further preferably 30 parts by weight.
  • the lower limit value of the addition amount of the petroleum resin tackifier (B2) is not particularly limited, but is preferably 0.5 parts by weight or more, more preferably 1 part by weight or more, The amount is more preferably 5 parts by weight or more, and further preferably 10 parts by weight or more.
  • the natural product type tackifier (B1) is contained as the tackifier (B)
  • the petroleum resin type tackifier (B2) may be added in an amount of 0 part by weight.
  • the rubber polymer (A) contains a styrenic thermoplastic elastomer (A1), a natural product tackifier (B1) and a petroleum resin tackifier (B2) are used as the tackifier (B).
  • a natural product tackifier (B1) it is preferable to use a petroleum resin-based tackifier (B2) in view of compatibility with the styrene moiety.
  • the addition amount of the natural product tackifier (B1) is preferably 0.5 to 150 parts by weight, more preferably 0.5 to 150 parts by weight with respect to 100 parts by weight of the styrenic thermoplastic elastomer (A1). 100 parts by weight is preferable, and the amount of petroleum resin tackifier (B2) added is preferably 0.5 to 150 parts by weight, and more preferably 0.5 to 100 parts by weight.
  • a natural product tackifier (B1) is used as the tackifier (B).
  • the amount of the natural product-based tackifier (B1) added is preferably 40 parts by weight or less, more preferably 30 parts by weight or less, with respect to 100 parts by weight of the isobutylene polymer (A2). More preferably, it is 20 parts by weight or less.
  • the lower limit of the addition amount of the tackifier (B) is not particularly limited, but is preferably 0.5 parts by weight or more, more preferably 1 part by weight or more, and 5 parts by weight. More preferably, it is the above.
  • the addition of the said petroleum resin-type tackifier (B2) to an adhesive composition is arbitrary, but the addition The amount is preferably 40 parts by weight or less, more preferably 20 parts by weight or less, and may be 0 part by weight with respect to 100 parts by weight of the isobutylene polymer (A2).
  • tackifiers other than the natural product-based tackifier (B1) and petroleum resin-based tackifier (B2) can be added to the pressure-sensitive adhesive composition of the present invention.
  • the addition amount of the other tackifier is preferably 100 parts by weight or less with respect to 100 parts by weight of the rubber-based polymer (A).
  • Additives other than those described above may be added to the pressure-sensitive adhesive composition of the present invention as long as the effects of the present invention are not impaired. Although it does not specifically limit as an additive, It is preferable from a viewpoint of an adhesive characteristic to add a softener (C).
  • the elastic modulus in the low temperature region of the pressure-sensitive adhesive layer may increase, and for example, certain characteristics such as impact resistance may deteriorate.
  • the softener (C) in the pressure-sensitive adhesive composition the elastic modulus of the rubber-based polymer (A) can be lowered due to its plastic effect, and as a result, the tackifier (B ) Is preferable because the occurrence of the above-described problems can be suppressed.
  • the softener (C) is selected from the group consisting of a polyisobutylene compound (C1) having a weight average molecular weight of 50,000 or less and a polyisoprene compound (C2) having a weight average molecular weight of 50,000 or less. There may be mentioned at least one softener.
  • the weight average molecular weight of the softener (C) is 50,000 or less, and more preferably 40,000 or less.
  • the lower limit of the weight average molecular weight of the softening agent (C) is not particularly limited, but is preferably 500 or more, and more preferably 1000 or more.
  • the polyisobutylene compound (C1) may be a compound composed of only isobutylene (polyisobutylene), and a copolymer containing isobutylene as a main monomer (that is, a copolymer containing isobutylene in a proportion exceeding 50 mol%). Thing).
  • copolymers include copolymers of isobutylene and normal butylene, 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).
  • Vulcanizates and modified products thereof for example, those modified with a functional group such as a hydroxyl group, a carboxyl group, an amino group, and an epoxy group.
  • polyisobutylene is preferable because it does not contain a double bond in the main chain and has excellent weather resistance.
  • the polyisoprene compound (C2) may be a compound consisting of isoprene alone (polyisoprene), and a copolymer having isoprene as a main monomer (that is, a copolymer having a proportion of isoprene exceeding 50 mol%).
  • a copolymer include butadiene-isoprene-styrene random copolymer, isoprene-styrene random copolymer, and hydrogenated polyisoprene.
  • hydrogenated polyisoprene is preferable from the viewpoint of the plasticizing effect on the rubber-based polymer.
  • softener (C) for example, commercially available products such as HV-300 manufactured by JX Nippon Mining & Energy, Kuraprene LIR-200 manufactured by Kuraray Co., Ltd. can be used.
  • the amount of the softening agent (C) added is not particularly limited, but is preferably 50 parts by weight or less, and 30 parts by weight or less with respect to 100 parts by weight of the rubber-based polymer (A). More preferably, it is more preferably 25 parts by weight or less.
  • the lower limit of the addition amount of the softening agent (C) is not particularly limited, but is preferably 0 part by weight or more, more preferably 1 part by weight or more, and 5 parts by weight or more. More preferably.
  • an organic solvent can be added as a diluent to the pressure-sensitive adhesive composition.
  • a diluent for example, toluene, xylene, dimethyl ether etc. can be mentioned, These can be used individually by 1 type or in mixture of 2 or more types. Among these, toluene is preferable.
  • the addition amount of the diluent is not particularly limited, but is preferably added to the pressure-sensitive adhesive composition at about 50 to 95% by weight, 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.
  • the pressure-sensitive adhesive composition may further contain any appropriate additive.
  • the additive include 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 pressure-sensitive adhesive composition can be appropriately set according to the purpose.
  • the content (total amount) of the additive in the 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.
  • Adhesive layer The adhesive layer of this invention was formed from the said adhesive composition.
  • An adhesive layer can be formed by apply
  • Various methods are used as a method for applying the 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 heating and drying temperature is preferably about 30 ° C to 200 ° C, more preferably 40 ° C to 180 ° C, and further preferably 80 ° C to 150 ° C. By setting the heating temperature in the above range, an adhesive layer having excellent adhesive properties can be obtained.
  • 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.
  • 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 of the pressure-sensitive adhesive layer of the present invention is not particularly limited, and can be appropriately set depending on the application, but is preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less, and 20 ⁇ m or less. More preferably.
  • 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.
  • the moisture permeability of the pressure-sensitive adhesive layer is not particularly limited, is preferably 100g / (m 2 ⁇ 24h) or less, more preferably 60g / (m 2 ⁇ 24h) or less, 50 g / (m 2 ⁇ 24h) or less is more preferable, 30g / (m 2 ⁇ 24h) or less is more preferable, and 20g / (m 2 ⁇ 24h) or less is particularly preferable.
  • the lower limit value of the moisture permeability is not particularly limited, but ideally, it is preferable that water vapor is not transmitted at all (that is, 0 g / (m 2 ⁇ 24 h)).
  • the moisture permeability of the 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, and deterioration of the optical film due to moisture. Etc. can be suppressed.
  • the moisture permeability is 40 ° C. and 92% R.D. when the pressure-sensitive 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.
  • optical film with a pressure-sensitive adhesive layer of the present invention comprises an optical film and the pressure-sensitive adhesive layer provided on the optical film.
  • the pressure-sensitive adhesive layer is formed on the optical film by applying the pressure-sensitive adhesive composition on the optical film and removing the solvent by heat drying or the like. be able to.
  • an adhesive layer can be formed on a support body etc., the said adhesive layer can be transcribe
  • the release-treated sheet used in the production of the optical film with the pressure-sensitive adhesive layer can be used as it is as a separator of the optical film with the 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 transparent protective film on one side or both sides of a polarizer is generally used, but in the present invention, a single-sided protective polarizing film is preferable from the viewpoint of thinning.
  • 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 a polyvinyl alcohol-based resin (hereinafter also referred to as PVA-based resin) layer and a stretching resin base material in a laminated state and a step of dyeing. 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
  • 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 transparent protective film include polymer blends.
  • the transparent protective film can also be formed as a cured layer of thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, and silicone.
  • thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, and silicone.
  • 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 transparent protective film include an ultraviolet curable adhesive and an electron beam curable adhesive.
  • the electron beam curable polarizing film adhesive exhibits suitable adhesiveness to the various transparent protective films.
  • the adhesive used in the present invention can contain a metal compound filler.
  • the surface of the transparent protective film to which the polarizer is not bonded 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 is a transparent protective film 5 of the polarizer 4.
  • 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 optical film can be activated.
  • Various methods can be employed for the activation treatment, such as corona treatment, low-pressure UV treatment, plasma treatment, and the like.
  • 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.
  • the weight average molecular weight (Mw) was measured by a gel permeation chromatography method (GPC method), and an HLC-8120 (manufactured by Tosoh Corp.) column with an inner diameter of 6.0 mm and a length of 150 mm (manufactured by Tosoh Corp., TSKgel SuperHZM-).
  • H / HZ4000 / HZ3000 / HZ2000 connected in series, tetrahydrofuran is used as the eluent, concentration is 1 g / L, flow rate is 0.6 ml / min, temperature is 40 ° C., sample injection volume is 20 ⁇ l, and detection The detector was an RI detector.
  • TSK standard polystyrene manufactured by Tosoh Corporation was used to prepare a calibration curve for molecular weight.
  • Production Example 1 (Production of polarizing film)
  • 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.
  • a polyvinyl alcohol adhesive so that the thickness of the adhesive layer is 0.1 ⁇ m on the surface of the polarizing film (polarizer, thickness: 5 ⁇ m) of the optical film laminate according to the polarizer
  • a protective film (a (meth) acrylic resin film having a lactone ring structure having a thickness of 20 ⁇ m and subjected to corona treatment) was bonded, followed by drying at 50 ° C. for 5 minutes. Subsequently, the amorphous PET base material was peeled off to produce a piece protective polarizing film using a thin polarizer.
  • Example 1 100 parts by weight of a styrene-ethylene-propylene-styrene block copolymer (SEPS, trade name: SEPTON 2063, styrene content: 13%, manufactured by Kuraray Co., Ltd.) as a rubber polymer (A) and a tackifier (B ) Hydrogenated terpene phenol (trade name: YS Polyster TH130, softening point: 130 ° C., hydroxyl value: 60, manufactured by Yasuhara Chemical Co., Ltd.), 40.4 parts by weight, petroleum-based tackifier (trade name: Picolastic A5, Vinyl toluene-based tackifier, softening point: 5 ° C., Eastman Kodak Co., Ltd.
  • SEPS styrene-ethylene-propylene-styrene block copolymer
  • softening agent (C) polybutene (trade name: HV-300, weight average molecular weight: 3000, JX Nippon Oil & Energy Co., Ltd.)
  • Toluene solution (adhesive solution) containing 21.3 parts was adjusted so that the solid content was 30% by weight.
  • a composition (solution) was prepared.
  • 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. Subsequently, 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 20 ⁇ m was produced. Also, 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 is in contact with the pressure-sensitive adhesive layer. Were pasted together. The polyester film coated on both sides of the pressure-sensitive adhesive layer functions as a release liner (separator).
  • One release liner of the pressure-sensitive adhesive sheet was peeled off, and the pressure-sensitive adhesive layer and the polarizer were laminated on the polarizer of the polarizing film obtained in Production Example 1 to obtain a polarizing film with a pressure-sensitive adhesive layer. .
  • 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 transparent protective film / polarizer / adhesive layer / separator.
  • Example 1 a polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that each component of the pressure-sensitive adhesive composition was changed to the composition described in Tables 1 and 2.
  • Comparative Example 8 production of acrylic pressure-sensitive adhesive layer
  • a separable flask equipped with a thermometer, a stirrer, a reflux condenser and a nitrogen gas introduction tube 99 parts by weight of butyl acrylate (BA), 1 part by weight of 4-hydroxybutyl acrylate (4HBA) as a monomer component, and a polymerization initiator
  • BA butyl acrylate
  • 4HBA 4-hydroxybutyl acrylate
  • a polymerization initiator After 0.2 parts by weight of azobisisobutyronitrile and ethyl acetate as a polymerization solvent were added so as to have a solid content of 20%, nitrogen substitution was performed for about 1 hour while flowing nitrogen gas and stirring. Thereafter, the flask was heated to 60 ° C.
  • an acrylic polymer having a weight average molecular weight (Mw) of 1.1 million.
  • solid content 100 parts by weight
  • 0.8 parts by weight of trimethylolpropane tolylene diisocyanate (trade name: Coronate L, manufactured by Nippon Polyurethane Industry Co., Ltd.) as an isocyanate-based crosslinking agent
  • silane coupling agent An acrylic pressure-sensitive adhesive composition was prepared by adding 0.1 parts by weight (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.).
  • a polarizing film with a pressure-sensitive adhesive layer was obtained in the same manner as in Example 1 except that the acrylic pressure-sensitive adhesive composition was used.
  • 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 surface was bonded to a triacetylcellulose 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 triacetylcellulose film, thickness 25 ⁇ m, manufactured by Konica Minolta Co., Ltd.
  • moisture permeability water vapor permeability
  • cup method conforming to JIS Z 0208
  • Measurement temperature 40 ° C
  • Relative humidity 92%
  • Measurement time 24 hours
  • a constant temperature and humidity chamber was used for the measurement.
  • a tape piece having a length of 100 mm and a width of 25 mm was obtained using the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples.
  • one release liner is peeled off from the tape piece to expose the adhesive surface, and the PET film (thickness: 25 ⁇ m) is bonded to the adhesive surface of the tape piece, and (release liner / adhesive layer / A single-sided adhesive tape with a substrate (length: 100 mm, width: 25 mm) laminated in the order of PET film) was produced.
  • the release liner was peeled from the single-sided adhesive tape with the substrate to obtain a measurement sample. Then 23 ° C., 50% R.D. H.
  • a glass plate (trade name: soda lime glass # 0050, manufactured by Matsunami Glass Industry Co., Ltd.) is bonded to the exposed adhesive surface (measurement surface) of the measurement sample, and the 2 kg roller is reciprocated once. Crimped. And 23 degreeC, 50% R. H. For 30 minutes.
  • a tensile tester (trade name: TCM-1kNB, manufactured by Minebea Co., Ltd.)
  • TCM-1kNB trade name: TCM-1kNB, manufactured by Minebea Co., Ltd.
  • the peel strength (N / 25 mm) was measured. Measurement was performed at 23 ° C. and 50% R.D. H. In the atmosphere, the peeling angle was 180 ° and the tensile speed was 300 mm / min.
  • ⁇ Durability> The separator of the polarizing film with the pressure-sensitive adhesive layer obtained in Examples and Comparative Examples was peeled off, the test piece was bonded to a glass plate, and the state after being put in an environment of 85 ° C. for 300 hours was visually or magnified (20 times) ). 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.
  • HYBRAR 7311 Styrene-ethylene-propylene-styrene block copolymer (SEPS, trade name: HYBRAR 7311, styrene content 12%, manufactured by Kuraray Co., Ltd.)

Landscapes

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

Abstract

La présente invention concerne une composition adhésive contenant un polymère à base de caoutchouc (A) et un agent donnant du collant (B), le polymère à base de caoutchouc (A) comprenant au moins un polymère à base de caoutchouc sélectionné dans le groupe constitué d'un élastomère thermoplastique à base de styrène (A1) et d'un polymère à base d'isobutylène (A2) ayant un poids moléculaire moyen en poids de 500 000 ou plus. Le polymère à base de caoutchouc comprend au moins l'un sélectionné dans le groupe constitué d'un agent donnant du collant à base de matière naturelle (B1), d'un agent donnant du collant à base de résine de pétrole (B2) et leurs produits hydrogénés, lors de l'incorporation de l'élastomère thermoplastique à base de styrène (A1) ; et comprend au moins l'un sélectionné dans le groupe constitué d'un agent donnant du collant à base de matière naturelle (B1) et ses produits hydrogénés, lors de l'incorporation du polymère à base d'isobutylène (A2). Cette composition adhésive présente une faible perméabilité à l'humidité, et est capable de former une couche adhésive qui, même dans des environnements de température élevée, est suffisamment durable pour ne pas souffrir de problèmes tels que la déstratification ou le décollement.
PCT/JP2016/077289 2015-09-16 2016-09-15 Composition adhésive, couche adhésive, film optique ayant une couche adhésive fixée, élément optique, et dispositif d'affichage d'image WO2017047703A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020187005240A KR102315599B1 (ko) 2015-09-16 2016-09-15 점착제 조성물, 점착제층, 점착제층을 갖는 광학 필름, 광학 부재 및 화상 표시 장치
CN201680052402.3A CN108026423B (zh) 2015-09-16 2016-09-15 粘合剂组合物、粘合剂层、带粘合剂层的光学膜、光学构件和图像显示装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-183197 2015-09-16
JP2015183197 2015-09-16
JP2016177677A JP6725373B2 (ja) 2015-09-16 2016-09-12 粘着剤組成物、粘着剤層、粘着剤層付光学フィルム、光学部材、及び画像表示装置
JP2016-177677 2016-09-12

Publications (1)

Publication Number Publication Date
WO2017047703A1 true WO2017047703A1 (fr) 2017-03-23

Family

ID=58288922

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/077289 WO2017047703A1 (fr) 2015-09-16 2016-09-15 Composition adhésive, couche adhésive, film optique ayant une couche adhésive fixée, élément optique, et dispositif d'affichage d'image

Country Status (1)

Country Link
WO (1) WO2017047703A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018080213A (ja) * 2016-11-14 2018-05-24 アイカ工業株式会社 粘着性組成物及び粘着性シート
WO2019022000A1 (fr) * 2017-07-24 2019-01-31 積水化学工業株式会社 Film de résine et stratifié contenant une plaque en verre
CN110462470A (zh) * 2017-03-28 2019-11-15 日东电工株式会社 带粘合剂层的偏振膜、内嵌型液晶面板用带粘合剂层的偏振膜、内嵌型液晶面板及液晶显示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013216853A (ja) * 2012-03-16 2013-10-24 Nitto Denko Corp 粘着剤組成物および粘着シート
WO2014132780A1 (fr) * 2013-02-28 2014-09-04 綜研化学株式会社 Composition adhésive sensible à la pression optique, feuille adhésive sensible à la pression optique, dispositif d'affichage d'images, et dispositif d'entrée/sortie
JP2015155490A (ja) * 2014-02-19 2015-08-27 日東電工株式会社 粘着シート

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013216853A (ja) * 2012-03-16 2013-10-24 Nitto Denko Corp 粘着剤組成物および粘着シート
WO2014132780A1 (fr) * 2013-02-28 2014-09-04 綜研化学株式会社 Composition adhésive sensible à la pression optique, feuille adhésive sensible à la pression optique, dispositif d'affichage d'images, et dispositif d'entrée/sortie
JP2015155490A (ja) * 2014-02-19 2015-08-27 日東電工株式会社 粘着シート

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018080213A (ja) * 2016-11-14 2018-05-24 アイカ工業株式会社 粘着性組成物及び粘着性シート
CN110462470A (zh) * 2017-03-28 2019-11-15 日东电工株式会社 带粘合剂层的偏振膜、内嵌型液晶面板用带粘合剂层的偏振膜、内嵌型液晶面板及液晶显示装置
WO2019022000A1 (fr) * 2017-07-24 2019-01-31 積水化学工業株式会社 Film de résine et stratifié contenant une plaque en verre
JPWO2019022000A1 (ja) * 2017-07-24 2020-05-28 積水化学工業株式会社 樹脂膜及びガラス板含有積層体
JP7060515B2 (ja) 2017-07-24 2022-04-26 積水化学工業株式会社 樹脂膜及びガラス板含有積層体

Similar Documents

Publication Publication Date Title
JP6725373B2 (ja) 粘着剤組成物、粘着剤層、粘着剤層付光学フィルム、光学部材、及び画像表示装置
JP7372275B2 (ja) 粘着剤層付偏光フィルム、光学部材、及び画像表示装置
WO2018042879A1 (fr) Composition adhésive autocollante à base de caoutchouc, couche adhésive autocollante à base de caoutchouc, film adhésif autocollant, film optique avec couche adhésive autocollante à base de caoutchouc, élément optique et dispositif d'affichage d'image
JP2015155490A (ja) 粘着シート
WO2017047703A1 (fr) Composition adhésive, couche adhésive, film optique ayant une couche adhésive fixée, élément optique, et dispositif d'affichage d'image
KR20200130837A (ko) 편광판 및 그것을 이용한 화상 표시 장치
JP6873682B2 (ja) 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
WO2013021830A1 (fr) Ruban adhésif
KR102223585B1 (ko) 점착성 수증기 배리어성 적층체 및 화상 표시장치
WO2017110913A1 (fr) 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
KR20200129150A (ko) 적층체, 복합 편광판 및 화상 표시 장치
WO2019176719A1 (fr) Stratifié, plaque de polarisation composite, et dispositif d'affichage d'image
WO2019176718A1 (fr) Plaque de polarisation, et dispositif d'affichage d'image utilisant cette plaque de polarisation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16846574

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20187005240

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16846574

Country of ref document: EP

Kind code of ref document: A1