CN104342041A - Adhesive composition, adhesive tape and adhesive sheet - Google Patents

Adhesive composition, adhesive tape and adhesive sheet Download PDF

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Publication number
CN104342041A
CN104342041A CN201410391854.7A CN201410391854A CN104342041A CN 104342041 A CN104342041 A CN 104342041A CN 201410391854 A CN201410391854 A CN 201410391854A CN 104342041 A CN104342041 A CN 104342041A
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China
Prior art keywords
mentioned
binder composition
weight
binder
binder layer
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Granted
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CN201410391854.7A
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Chinese (zh)
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CN104342041B (en
Inventor
设乐浩司
冈本昌之
徐创矢
安藤雅彦
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Nitto Denko Corp
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Nitto Denko Corp
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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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • 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
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks

Abstract

The invention relates to an adhesive composition, an adhesive tape and an adhesive sheet. The invention aims at providing an adhesive composition which can form an adhesive layer having excellent damp resistance and ensuring adhesive tension (adhesive force) without performing solidification treatment. The adhesive composition has an acrylic acid-based monomer mixture or a partial polymer thereof and an isobutylene-based polymer, and is characterized in that moisture permeability of the adhesive layer formed by the adhesive composition is below 100 g/m2*day.

Description

Binder composition, self adhesive tape or adhesive sheet
Technical field
The present invention relates to binder composition and self adhesive tape or adhesive sheet.
Background technology
In the past, sticked with glue agent or tackiness agent as damp proof, the known composition (such as, see patent documentation 1,2,3) containing epoxy resin.But the composition containing epoxy resin is pasting after on adherend, need to heat-treat or the solidification treatment such as UV treatment (UV process) to guarantee adhesive power, to be heated or ultraviolet adherend or base material are difficult to use for easily not resistance to.In addition, be difficult to guarantee adhesive power when relaxing condition of cure or not implementing solidification treatment.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2010-126699 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2012-151109 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2007-112956 publication
Summary of the invention
Invent problem to be solved
Therefore, the object of the present invention is to provide to be formed and can guarantee adhesive power (bounding force) when not implementing solidification treatment and the binder composition of the excellent binder layer of moisture resistance.
In addition, another object of the present invention is to provide have and can guarantee adhesive power (bounding force) when not implementing solidification treatment and the self adhesive tape of the excellent binder layer of moisture resistance or adhesive sheet after laminating.
For the means of dealing with problems
Present inventor has performed research extensively and profoundly, found that, for the binder composition containing acrylic monomer mixture or its partial polymer and isobutylene-based polymer, when being set as the binder layer formed by this binder composition, can be formed and can guarantee adhesive power (bounding force) when not implementing solidification treatment and the excellent binder layer of moisture resistance, thus complete the present invention.
That is, the invention provides a kind of binder composition, it contains acrylic monomer mixture or its partial polymer and isobutylene-based polymer, it is characterized in that,
The binder layer formed by described binder composition, the Water Vapour Permeability that measured by following method is 100g/m 2below it,
The measuring method of Water Vapour Permeability: use the test sample above obtained by the binder layer formed by described binder composition (thickness 50 μm) being fitted to triacetylcellulose film (thickness 25 μm), according to the Water Vapour Permeability test method of JIS Z 0208, under following condition, measure Water Vapour Permeability:
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours.
The adhesive power of the binder layer formed by described binder composition is preferably more than 1.0N/25mm.
The content of described isobutylene-based polymer is preferably more than 15 weight parts relative to described acrylic monomer mixture or its partial polymer 100 weight part.
The binder layer formed by described binder composition preferably has crosslinking structure.
The gel fraction of the binder layer formed by described binder composition is preferably more than 20 % by weight.
In addition, the invention provides a kind of self adhesive tape or adhesive sheet, it is characterized in that, there is the binder layer formed by above-mentioned binder composition.
Invention effect
Binder composition of the present invention has above-mentioned formation, therefore can be formed and can guarantee adhesive power (bounding force) when not implementing solidification treatment and the excellent binder layer of moisture resistance.
In addition, self adhesive tape of the present invention or adhesive sheet have the binder layer formed by above-mentioned binder composition, therefore can guarantee adhesive power (bounding force) when not implementing solidification treatment after laminating and moisture resistance is excellent.
Embodiment
[binder composition]
Binder composition of the present invention is at least containing acrylic monomer mixture or its partial polymer and isobutylene-based polymer.In binder composition of the present invention, isobutylene-based polymer is dissolved or dispersed in acrylic monomer mixture or its partial polymer.Binder composition of the present invention is preferably the acrylic pressure-sensitive adhesive compositions containing acrylic monomer mixture or its partial polymer.In addition, the acrylic adhesive layer that the binder layer formed by binder composition of the present invention is preferably formed by acrylic pressure-sensitive adhesive compositions.
In this specification sheets, " acrylic monomer mixture " refers to the mixture (or single thing) that only comprises monomer component and containing the mixture (or single thing) of at least one acrylic monomer as monomer component." partial polymer of acrylic monomer mixture " refers to the composition that one or more monomer components in monomer component contained in acrylic monomer mixture are partially polymerized.In the partial polymer of acrylic monomer mixture, also to comprise in monomer component and acrylic monomer mixture the partially polymerized and mixture of partial polymer that obtains of one or more contained monomer components.
In addition, in this specification sheets, binder composition is the implication of the composition for the formation of binder layer, comprises the implication of the composition for the formation of tackiness agent.
Binder composition of the present invention is not particularly limited, can be the composition at least containing acrylic monomer mixture and isobutylene-based polymer, also can be at least containing the partial polymer of acrylic monomer mixture and the composition of isobutylene-based polymer.Particularly, from the viewpoint of making isobutylene-based polymer be dissolved or dispersed in acrylic monomer mixture or its partial polymer equably, binder composition of the present invention is preferably the composition at least containing acrylic monomer mixture and isobutylene-based polymer.
In binder composition of the present invention except acrylic monomer mixture or its partial polymer, isobutylene-based polymer, can also containing arbitrary compositions such as Photoepolymerizationinitiater initiaters described later.Such as, when binder composition of the present invention is the composition at least containing acrylic monomer mixture and isobutylene-based polymer, in binder composition of the present invention except acrylic monomer mixture and isobutylene-based polymer, also can contain Photoepolymerizationinitiater initiater.In addition, when binder composition of the present invention is the composition at least containing the partial polymer of acrylic monomer mixture and isobutylene-based polymer, except the partial polymer of acrylic monomer mixture and isobutylene-based polymer, also can contain Photoepolymerizationinitiater initiater.
In binder composition of the present invention, acrylic monomer mixture or its partial polymer are relative to the total amount (gross weight of binder composition of the present invention, 100 % by weight) ratio is not particularly limited, from the viewpoint of the sufficient tackiness guaranteed adherend, be preferably more than 30 % by weight, be more preferably more than 50 % by weight.
(acrylic monomer mixture or its partial polymer)
Acrylic monomer mixture is the mixture (single thing) of one or more monomer components, containing at least one acrylic monomer.Aforesaid propylene acrylic monomer mixture only can contain acrylic monomer, also can containing the monomer beyond acrylic monomer and acrylic monomer.As the monomer beyond such acrylic monomer, be not particularly limited, polar functionalities monomer described later or polyfunctional monomer etc. can be enumerated.In addition, the monomer (being sometimes referred to as " other copolymerisable monomer ") beyond (methyl) described later alkyl acrylate, polar functionalities monomer and polyfunctional monomer can be enumerated.Such as, acrylic monomer mixture can be the mixture also containing polar functionalities monomer, polyfunctional monomer except acrylic monomer.
In aforesaid propylene acrylic monomer mixture, be not particularly limited, preferably containing such as (methyl) alkyl acrylate.Above-mentioned (methyl) alkyl acrylate may be used singly or two or more in combination.
In addition, " (methyl) vinylformic acid " refers to " vinylformic acid " and/or " methacrylic acid " (side in " vinylformic acid " and " methacrylic acid " or two sides), below equally.
In addition, " alkyl " refers to straight or branched alkyl if not otherwise specified.
As above-mentioned (methyl) alkyl acrylate, be not particularly limited, can enumerate and such as there is (methyl) alkyl acrylate ((methyl) vinylformic acid C that carbonatoms is the alkyl of 1 ~ 24 1-24alkyl ester).
As above-mentioned (methyl) vinylformic acid C 1-24alkyl ester, is not particularly limited, and can enumerate such as: (methyl) methyl acrylate, (methyl) ethyl propenoate, (methyl) propyl acrylate, (methyl) isopropyl acrylate, (methyl) n-butyl acrylate, (methyl) isobutyl acrylate, (methyl) sec-butyl acrylate, (methyl) tert-butyl acrylate, (methyl) amyl acrylate, (methyl) isoamyl acrylate, (methyl) Ethyl acrylate, (methyl) heptylacrylate, (methyl) Octyl acrylate, (methyl) 2-EHA, (methyl) Isooctyl acrylate monomer, (methyl) vinylformic acid ester in the ninth of the ten Heavenly Stems, (methyl) vinylformic acid ester in the different ninth of the ten Heavenly Stems, (methyl) dodecylacrylate, (methyl) tridecyl acrylate, (methyl) vinylformic acid tetradecyl ester, (methyl) vinylformic acid pentadecyl ester, the different pentadecyl ester of (methyl) vinylformic acid, (methyl) aliphatic acrylate, (methyl) vinylformic acid isocetyl ester etc.
The content of above-mentioned (methyl) alkyl acrylate in aforesaid propylene acrylic monomer mixture is not particularly limited, such as, more than 10 % by weight (such as 10 ~ 100 % by weight) are preferably relative to aforesaid propylene acrylic monomer amount of the mixture (100 % by weight), be more preferably more than 20 % by weight, more preferably more than 30 % by weight.In addition, time in aforesaid propylene acrylic monomer mixture containing two or more (methyl) alkyl acrylate, the content of above-mentioned (methyl) alkyl acrylate refers to the total amount of the content of all (methyl) alkyl acrylates contained in aforesaid propylene acrylic monomer mixture.
As mentioned above, in aforesaid propylene acrylic monomer mixture, from the viewpoint of the tackiness that binder layer obtains the viewpoint of cohesive force of appropriateness, binder layer obtains appropriateness, polar functionalities monomer can be contained.As above-mentioned polar functionalities monomer, be not particularly limited, can enumerate such as: the carboxyl group-containing monomers such as (methyl) vinylformic acid, methylene-succinic acid, toxilic acid, fumaric acid, β-crotonic acid, iso-crotonic acid (also comprise maleic anhydride etc. and contain anhydride group monomer); Hydroxyl (hydroxy) monomers such as (methyl) hydroxyalkyl acrylate, vinyl alcohol, vinyl carbinol such as (methyl) vinylformic acid 2-hydroxy methacrylate, (methyl) vinylformic acid 3-hydroxy propyl ester, (methyl) vinylformic acid 4-hydroxybutyl, the own ester of (methyl) vinylformic acid 6-hydroxyl; The amide-containing monomers such as (methyl) acrylamide, N, N-dimethyl (methyl) acrylamide, N-methylol (methyl) acrylamide, N-methoxymethyl (methyl) acrylamide, N-butoxymethyl (methyl) acrylamide, N-hydroxyethyl (methyl) acrylamide; The emulsion stabilities such as (methyl) acrylate, (methyl) acrylate, (methyl) tbutylaminoethylacrylate; (methyl) glycidyl acrylate, (methyl) vinylformic acid methylglycidyl esters etc. are containing epoxy based monomers; The cyano-containing such as vinyl cyanide, methacrylonitrile monomer; NVP, (methyl) acryloyl morpholine and vinyl pyridine, N-vinylpiperidone, vinyl pyrimidine, N-vinyl piperazine, N-vinyl pyrrole, N-vinyl imidazole, vinyl azoles etc. are containing heterocyclic vinyl base class monomer; Sodium vinyl sulfonates etc. are containing sulfonic group monomer; The phosphorous acid-based monomers such as acryl phosphoric acid 2-hydroxy methacrylate; N-cyclohexylmaleimide, isopropylmaleimide etc. are containing imide monomer; 2-methylacryoyloxyethyl isocyanic ester etc. are containing isocyanate group monomer; Deng.Above-mentioned polar functionalities monomer may be used singly or two or more in combination.
Wherein, from the viewpoint of the adhesion characteristic to glass, above-mentioned polar functionalities monomer is preferably carboxyl group-containing monomer, hydroxyl monomer, is more preferably vinylformic acid (AA), vinylformic acid 2-hydroxy methacrylate (HEA), vinylformic acid 4-hydroxybutyl (4HBA).
In aforesaid propylene acrylic monomer mixture, the content of above-mentioned polar functionalities monomer is not particularly limited, and such as, is preferably 0 ~ 75 % by weight, is more preferably 0 ~ 50 % by weight relative to aforesaid propylene acrylic monomer amount of the mixture (100 % by weight).In addition, time in aforesaid propylene acrylic monomer mixture containing two or more polar functionalities monomer, the content of above-mentioned polar functionalities monomer refers to the total amount of the content of all polar functionalities monomers contained in aforesaid propylene acrylic monomer mixture.
In addition, as mentioned above, from can easily carrying out the viewpoint of the adjustment of the gel fraction of binder layer by crosslinked and binder layer can be made not allow runny viewpoint to consider by crosslinked, in aforesaid propylene acrylic monomer mixture, polyfunctional monomer can be contained.Above-mentioned polyfunctional monomer refers in a part the monomer with two or more ethylenically unsaturated group.As above-mentioned ethylenically unsaturated group, be not particularly limited, can enumerate such as: the free redical polymerization functional groups such as vinyl, propenyl, pseudoallyl, vinyl ether (vinyloxy group), allyl ether (allyloxy).In addition, above-mentioned (methyl) alkyl acrylate, (methyl) alkoxyalkyl acrylate, polar functionalities monomer and other copolymerisable monomer are the monomer (monofunctional monomer) only in a part with an ethylenically unsaturated group.
As above-mentioned polyfunctional monomer, be not particularly limited, can enumerate such as: hexylene glycol two (methyl) acrylate (1, 6-hexylene glycol two (methyl) acrylate), butyleneglycol two (methyl) acrylate, (gathering) ethylene glycol bisthioglycolate (methyl) acrylate, (gathering) propylene glycol two (methyl) acrylate, neopentyl glycol two (methyl) acrylate, tetramethylolmethane two (methyl) acrylate, tetramethylolmethane three (methyl) acrylate, Dipentaerythritol six (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, tetramethylol methane three (methyl) acrylate, (methyl) allyl acrylate, (methyl) vinyl acrylate, Vinylstyrene, epoxy acrylate, polyester acrylate, urethane acrylate etc.Wherein, preferred Viscoat 295.In addition, above-mentioned polyfunctional monomer may be used singly or two or more in combination.
The content of above-mentioned polyfunctional monomer is not particularly limited, such as, relative to aforesaid propylene acrylic monomer amount of the mixture (100 % by weight), be preferably 0.0001 ~ 5 % by weight, be more preferably 0.001 ~ 3 % by weight, more preferably 0.005 ~ 1 % by weight.In addition, time in aforesaid propylene acrylic monomer mixture containing two or more polyfunctional monomer, the content of above-mentioned polyfunctional monomer refers to the total amount of the content of all polyfunctional monomers contained in aforesaid propylene acrylic monomer mixture.
As mentioned above, in aforesaid propylene acrylic monomer mixture, other copolymerisable monomer (monomer beyond above-mentioned (methyl) alkyl acrylate, above-mentioned polar functionalities monomer, above-mentioned polyfunctional monomer) can be contained as monomer component.As other copolymerisable monomer above-mentioned, can enumerate such as: (methyl) alkoxyalkyl acrylates such as (methyl) vinylformic acid 2-methoxy acrylate, (methyl) vinylformic acid 2-ethoxy ethyl ester, (methyl) methoxyethyl triglycol ester, (methyl) vinylformic acid 3-methoxyl group propyl ester, (methyl) vinylformic acid 3-oxyethyl group propyl ester, (methyl) vinylformic acid 4-methoxybutyl, (methyl) vinylformic acid 4-Ethoxybutyl; (methyl) glycidyl acrylate, (methyl) vinylformic acid methylglycidyl esters etc. are containing epoxy based monomers; Sodium vinyl sulfonates etc. are containing sulfonic group monomer; Phosphorous acid-based monomers; (methyl) vinylformic acid ring pentyl ester, (methyl) cyclohexyl acrylate, (methyl) isobornyl acrylate etc. have (methyl) acrylate of alicyclic hydrocarbon radical; (methyl) phenyl acrylate, (methyl) acrylate, (methyl) benzyl acrylate etc. have (methyl) acrylate of aryl; The vinyl ester such as ethyl acetate, propionate; The aromatic ethenyl compound such as vinylbenzene, Vinyl toluene; Olefines or the dienes such as ethene, propylene, divinyl, isoprene, iso-butylene; The vinyl ethers such as vinyl alkyl ethers; Vinylchlorid etc.In addition, other copolymerisable monomer may be used singly or two or more in combination.
Aforesaid propylene acrylic monomer mixture, is not particularly limited, such as can by above-mentioned monomer component mixing (preferred Homogeneous phase mixing) being prepared.
The partial polymer of aforesaid propylene acrylic monomer mixture is by obtaining aforesaid propylene acrylic monomer polymerization of mixtures.As polymerization process, be not particularly limited, can preferably enumerate such as: by irradiating the polymerization that active energy beam carries out.In addition, from the viewpoint of the inhibition suppressing oxygen to cause, preferably avoid contacting with oxygen being polymerized.Such as, preferably carry out in a nitrogen atmosphere being polymerized or using release liner starvation to be polymerized.
As the active energy beam irradiated during above-mentioned active energy beam polymerization (photopolymerization), can enumerate such as: ionizing ray, the ultraviolets etc. such as alpha-ray, β ray, gamma-rays, neutron ray, electron rays, particularly preferably ultraviolet.In addition, the irradiation energy, irradiation time, illuminating method etc. of active energy beam are not particularly limited, as long as Photoepolymerizationinitiater initiater can be made to activate, thus the polyreaction of monomer occur.
During above-mentioned active energy beam polymerization (photopolymerization), the polymerization starters such as Photoepolymerizationinitiater initiater (light trigger) can be used.Above-mentioned polymerization starter may be used singly or two or more in combination.
As above-mentioned Photoepolymerizationinitiater initiater, be not particularly limited, can enumerate such as: benzoin ethers Photoepolymerizationinitiater initiater, acetophenones Photoepolymerizationinitiater initiater, α-one alcohols Photoepolymerizationinitiater initiater, aromatic sulfonyl class Photoepolymerizationinitiater initiater, photolytic activity oximes Photoepolymerizationinitiater initiater, bitter almond oil camphor class Photoepolymerizationinitiater initiater, dibenzoyl class Photoepolymerizationinitiater initiater, benzophenone Photoepolymerizationinitiater initiater, ketal class Photoepolymerizationinitiater initiater, thioxanthene ketone Photoepolymerizationinitiater initiater etc.
As above-mentioned benzoin ethers Photoepolymerizationinitiater initiater, can enumerate such as: benzoin methylether, ethoxybenzoin, bitter almond oil camphor propyl ether, benzoin iso-propylether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethane-1-ketone, anisoin methyl ether etc.As above-mentioned acetophenones Photoepolymerizationinitiater initiater, can enumerate such as: 2,2-diethoxy acetophenone, 2,2-dimethoxy-2-phenyl acetophenone, 1-hydroxycyclohexyl phenyl ketone, 4-phenoxydichloroacetophenone, 4-(tertiary butyl) dichloroacetophenone etc.As above-mentioned α-one alcohols Photoepolymerizationinitiater initiater, can enumerate such as: 2-methyl-2-hydroxypropiophenonepreparation, 1-[4-(2-hydroxyethyl) phenyl]-2-methylpropane-1-ketone etc.As above-mentioned aromatic sulfonyl class Photoepolymerizationinitiater initiater, can enumerate such as: 2-naphthalic sulfonic chloride etc.As above-mentioned photolytic activity oximes Photoepolymerizationinitiater initiater, can enumerate such as: 1-phenyl-1,2-propanedione-2-(O-ethoxycarbonyl) oxime etc.As above-mentioned bitter almond oil camphor class Photoepolymerizationinitiater initiater, can enumerate such as: bitter almond oil camphor etc.As above-mentioned dibenzoyl class Photoepolymerizationinitiater initiater, can enumerate such as: dibenzoyl etc.As above-mentioned benzophenone Photoepolymerizationinitiater initiater, can enumerate such as: benzophenone, benzoylbenzoic acid, 3,3 '-dimethyl-4-methoxy benzophenone, polyvinyl benzophenone, Alpha-hydroxy cyclohexyl phenyl ketone etc.As above-mentioned ketal class Photoepolymerizationinitiater initiater, can enumerate such as: dibenzoyl dimethyl ketal etc.As above-mentioned thioxanthene ketone Photoepolymerizationinitiater initiater, can enumerate such as: thioxanthone, CTX, 2-methyl thioxanthone, 2,4-dimethyl thioxanthone, isopropyl thioxanthone, 2,4-diisopropylthioxanthone, dodecyl thioxanthone etc.
The usage quantity of above-mentioned Photoepolymerizationinitiater initiater is not particularly limited, and relative to monomer component total amount 100 weight part, is preferably 0.005 ~ 1 weight part, is more preferably 0.01 ~ 0.5 weight part.
The percent polymerization of the partial polymer of aforesaid propylene acrylic monomer mixture is not particularly limited, such as, be preferably less than 20 % by weight, be more preferably less than 15 % by weight.
The percent polymerization of the partial polymer of acrylic monomer mixture is obtained in the following manner.
A part for sampling part polymkeric substance is as sample.Its weight obtained by this sample of accurate weighing, as " weight of the partial polymer before drying ".Then, by sample 130 DEG C of dryings 2 hours, its weight obtained by the dried sample of accurate weighing, as " weight of dried polymkeric substance ".Then, the weight by the sample reduced 130 DEG C of dryings 2 hours is obtained, as " weight reduction " (volatile matter, unreacted monomer weight) by " weight of the partial polymer before drying " and " weight of dried polymkeric substance ".
By obtained " weight of the partial polymer before drying " and " weight reduction ", obtained the percent polymerization (% by weight) of partial polymer by following formula.
Percent polymerization (% by weight)=[1-(weight reduction)/(weight of the partial polymer before drying)] × 100 of the partial polymer of monomer component
(isobutylene-based polymer)
Binder composition of the present invention contains aforesaid propylene acrylic monomer mixture or its partial polymer and isobutylene-based polymer.Therefore, the Water Vapour Permeability of the binder layer formed by binder composition of the present invention is little.Infer this is because, isobutylene-based polymer self be not easy to make water vapor through, and the isobutylene-based polymer in this binder layer wants the path etc. by blocking, extend or reduce water vapor during binder layer at water vapor, thus water vapor is hindered to pass through binder layer.
Above-mentioned isobutylene-based polymer (polyisobutene) is at least containing the polymkeric substance of monomer constitutional units deriving from iso-butylene.That is, above-mentioned isobutylene-based polymer is the polymkeric substance obtained by the polymerizing monomer components comprising iso-butylene.In addition, above-mentioned isobutylene-based polymer also can at least having the polymkeric substance of polyisobutene skeleton in main chain or side chain.Above-mentioned isobutylene-based polymer may be used singly or two or more in combination.
Above-mentioned isobutylene-based polymer can be the homopolymer of iso-butylene, also can be the multipolymer (isobutylene copolymers) of iso-butylene and other monomer.In above-mentioned isobutylene copolymers, as other monomer with isobutylene copolymers, be not particularly limited, the monomer such as with olefinic double bond can be enumerated.As the above-mentioned monomer with olefinic double bond, can enumerate such as: the alpha-olefin of carbonatoms 2 ~ 20 (such as, ethene, propylene etc.), aromatic ethenyl compound (such as, the styrene compound such as vinylbenzene, vinyl toluene etc.), 1,3-butadiene compounds (such as, 1,3-butadiene, isoprene etc.) etc.Wherein, the viewpoint of the cohesive force that is easy to get calmly is considered, optimization styrene compounds.The monomer component forming above-mentioned isobutylene-based polymer may be used singly or two or more in combination.
As above-mentioned isobutylene-based polymer, be not particularly limited, can enumerate such as: the segmented copolymer etc. of the polymer blocks (such as, the styrenic polymer block, isoprenoid polymer blocks etc. of styrene compound) of isoprene-isobutylene rubber (polymkeric substance of iso-butylene and isoprene), iso-butylene and the random copolymers of n-butene, the polymer blocks of iso-butylene and other monomer.Wherein, preferably have styrenic polymer block as hard segment, there is styreneisobutylene segmented copolymer (SIB segmented copolymer), the styreneisobutylene-styrene block copolymer (SIBS segmented copolymer) of isobutene polymer block as soft chain segment.
Above-mentioned SIBS segmented copolymer can use commercially available product, can enumerate such as: trade(brand)name " SIBSTAR-062M " (Co., Ltd. カ ネ カ manufactures), trade(brand)name " SIBSTAR-062T " (Co., Ltd. カ ネ カ manufactures), trade(brand)name " SIBSTAR-072T " (Co., Ltd. カ ネ カ manufactures) etc.
The ratio forming iso-butylene in the monomer of above-mentioned isobutylene-based polymer is not particularly limited, from the viewpoint of the moisture resistance of binder layer, be preferably more than 30 % by weight (such as 30 ~ 100 % by weight) relative to the whole monomer component total amounts (100 % by weight) forming above-mentioned isobutylene-based polymer, be more preferably more than 50 % by weight (such as 50 ~ 100 % by weight).
In binder composition of the present invention, the content of above-mentioned isobutylene-based polymer is not particularly limited, and relative to aforesaid propylene acrylic monomer mixture or its partial polymer 100 weight part, is preferably more than 15 % by weight (such as 15 ~ 100 weight parts).When the content of above-mentioned isobutylene-based polymer is more than 15 % by weight, for the binder layer that binder composition is formed, easily obtain more excellent moisture resistance.In addition, when the content of above-mentioned isobutylene-based polymer is below 100 % by weight, in the binder layer formed by binder composition, there is sufficient tackiness, even and if at high temperature also easily obtain excellent cohesive force.In addition, the flowing of binder layer can effectively be suppressed, therefore preferably.
(tackifying resin)
In binder composition of the present invention, improve tackiness further from the viewpoint of the binder layer formed by binder composition, also can contain tackifying resin.As above-mentioned tackifying resin, be not particularly limited, can enumerate such as: alicyclic saturated hydrocarbon resinoid, petroleum resinoid, terpenoid resin, coumarone-indenes resinoid, styrene resin, rosin based resin, alkyl phenolic resin, xylene resin etc.Above-mentioned tackifying resin can be the tackifying resin (such as, carrying out hydrogenation to tackifying resins such as alicyclic saturated hydrocarbon resinoid, rosin based resin, petroleum resin, terpenoid resin, coumarone-indenes resinoid, styrene resin, alkyl phenolic resin, xylene resins and the derivative (hydrogenation type rosin based resin, hydrogenation type petroleum resinoid, hydrogenation type terpenoid resin etc.) obtained) of hydrogenation type.Above-mentioned tackifying resin may be used singly or two or more in combination.
In binder composition of the present invention, the content of above-mentioned tackifying resin is not particularly limited, relative to aforesaid propylene acrylic monomer mixture or its partial polymer 100 weight fraction, be preferably 1 ~ 50 weight part, be more preferably 1.5 ~ 40 weight parts, more preferably 2 ~ 30 weight parts.When the content of above-mentioned tackifying resin is more than 1 weight part, for the binder layer formed by binder composition, easily obtain excellent tackiness, therefore preferably.In addition, when the content of above-mentioned tackifying resin is below 50 weight parts, for the binder layer formed by binder composition, cohesive force is not easy to decline, therefore preferably.
In the scope not damaging effect of the present invention, binder composition of the present invention also can contain acrylic acid or the like oligopolymer.Acrylic acid or the like oligopolymer works as adhesion-promoting components, therefore can improve tackiness.Aforesaid propylene acid based oligomerization thing may be used singly or two or more in combination.
In the scope not damaging effect of the present invention, binder composition of the present invention also can contain silane coupling agent.Time in binder composition of the present invention containing silane coupling agent, for the binder layer formed by binder composition, tackiness (to the tackiness of glass under the tackiness particularly under hot and humid environment, hot and humid environment) improves further.Above-mentioned silane coupling agent may be used singly or two or more in combination.
As above-mentioned silane coupling agent, be not particularly limited, can preferably enumerate: γ-glycidoxypropyltrime,hoxysilane, γ-glycidoxypropyl group triethoxyl silane, gamma-amino propyl trimethoxy silicane, N-phenyl amino propyl Trimethoxy silane etc.
In binder composition of the present invention, the content of above-mentioned silane coupling agent is not particularly limited, and relative to aforesaid propylene acrylic monomer mixture or its partial polymer 100 weight part, is preferably 0.01 ~ 1 weight part, is more preferably 0.03 ~ 0.5 weight part.
From the viewpoint be adjusted to by the gel fraction of the binder layer formed by binder composition in suitable scope, make the binder layer formed by binder composition be not easy flowing thus the consideration of easy to handle viewpoint, in binder composition of the present invention, also can contain linking agent.As above-mentioned linking agent, be not particularly limited, can enumerate such as: isocyanates linking agent, epoxies linking agent, melamine class linking agent, peroxide linking agent, ureas linking agent, metal alkoxide class linking agent, metallo-chelate class linking agent, metallic salt linking agent, carbodiimide class linking agent, azoles quinoline class linking agent, aziridines linking agent, amine cross-linking agent etc.Wherein, preferred isocyanate class linking agent, epoxies linking agent.Above-mentioned linking agent may be used singly or two or more in combination.
As above-mentioned isocyanates linking agent (polyfunctional isocyanate compound), can enumerate such as: 1, the lower aliphatic polyisocyanates such as 2-ethylidene diisocyanate, tetramethylene vulcabond, 1,6-hexamethylene diisocyanate; The alicyclic polyisocyanates classes such as cyclopentylene diisocyanate, cyclohexylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenation of benzene dimethylene diisocyanate; 2,4 toluene diisocyanate, 2,6-tolylene diisocyanates, 4, the aromatic polyisocyanate such as 4 '-diphenylmethanediisocyanate, xylylene diisocyanate class.In addition, [Nippon Polyurethane Industry Co., Ltd. manufactures can to enumerate TriMethylolPropane(TMP)/tolylene diisocyanate affixture, trade(brand)name " コ ロ ネ ー ト L "], TriMethylolPropane(TMP)/hexamethylene diisocyanate affixture [Nippon Polyurethane Industry Co., Ltd. manufacture, trade(brand)name " コ ロ ネ ー ト HL "] etc.
As above-mentioned epoxies linking agent (multi-functional epoxy compound), can enumerate such as: N, N, N ', N '-four glycidyl group m-xylene diamine, diglycidylaniline, two (N, the N-diglycidyl amino methyl) hexanaphthene of 1,3-, 1,6-hexylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl base ether, propylene glycol diglycidyl ether, polyethylene glycol diglycidyl base ether, polypropylene glycol diglycidyl ether, the many glycidyl ethers of sorbyl alcohol, the many glycidyl ethers of glycerine, the many glycidyl ethers of tetramethylolmethane, the many glycidyl ethers of Polyglycerine, the many glycidyl ethers of anhydrous sorbitol, trimethylolpropane polyglycidyl ether, hexanodioic acid 2-glycidyl ester, o-phthalic acid diglycidyl ester, three (2-hydroxyethyl) triglycidyl isocyanurate, Resorcinol diglycidyl ether, bisphenol-S diglycidyl base ether, and there is in molecule the epoxy resin etc. of two or more epoxy group(ing).In addition, the commercially available products such as trade(brand)name " テ ト ラ ッ De C " (Mitsubishi Gas Chemical Co., Ltd's manufacture) can also be enumerated.
In binder composition of the present invention, the content of above-mentioned linking agent is not particularly limited, control in suitable scope from the viewpoint of by the gel fraction of the binder layer formed by binder composition, relative to aforesaid propylene acrylic monomer mixture or its partial polymer 100 weight part, be preferably 0.001 ~ 30 weight part, be more preferably 0.005 ~ 25 weight part, more preferably 0.01 ~ 20 weight part.
In the scope not damaging effect of the present invention, in binder composition of the present invention, additive can be contained.As above-mentioned additive, can enumerate such as: crosslinking accelerator, antiaging agent, weighting agent, tinting material (pigment, dyestuff etc.), UV light absorber, antioxidant, chain-transfer agent, softening agent, tenderizer, tensio-active agent, antistatic agent etc.Above-mentioned additive may be used singly or two or more in combination.
As the preparation method of binder composition of the present invention, be not particularly limited, can enumerate such as: by aforesaid propylene acrylic monomer mixture or its partial polymer, isobutylene-based polymer, any composition (such as, above-mentioned Photoepolymerizationinitiater initiater, above-mentioned tackifying resin, aforesaid propylene acid based oligomerization thing, above-mentioned silane coupling agent, above-mentioned linking agent, above-mentioned additive etc.) mixing of adding as required.
Such as, when binder composition of the present invention is containing acrylic monomer mixture and isobutylene-based polymer, composition also containing Photoepolymerizationinitiater initiater, such composition can by prepare the mixing of acrylic monomer mixture, isobutylene-based polymer and Photoepolymerizationinitiater initiater.
In addition, binder composition of the present invention is partial polymer containing acrylic monomer mixture and isobutylene-based polymer, composition also containing Photoepolymerizationinitiater initiater time, such composition can by prepare the mixing of the partial polymer of acrylic monomer mixture, isobutylene-based polymer and Photoepolymerizationinitiater initiater.As mentioned above, the partial polymer of acrylic monomer mixture is formed by making acrylic monomer mixture partially polymerized, such as containing the partial polymer of acrylic monomer mixture and isobutylene-based polymer, composition also containing Photoepolymerizationinitiater initiater, can pass through first by partially polymerized for the composition at least containing acrylic monomer mixture and Photoepolymerizationinitiater initiater, and then add Photoepolymerizationinitiater initiater to prepare.In addition, at least containing the partial polymer of acrylic monomer mixture and the composition of isobutylene-based polymer, by first making acrylic monomer mixture partially polymerized, and then acrylic monomer or polyfunctional monomer etc. can be added prepare.
The viscosity of binder composition of the present invention is not particularly limited, and from the viewpoint of making the easier viewpoint of the operation of binder composition, improving coating further, is preferably 0.1 ~ 100Pas, is more preferably 0.5 ~ 50Pas.
In addition, the viscosity in this specification sheets refers to and uses BH viscometer as viscometer, at rotor: No. 5 rotor, rotating speed: 10rpm, mensuration temperature: the viscosity measured under the condition of 30 DEG C.
In addition, the viscosity of aforesaid propylene acrylic monomer mixture is low, therefore has the tendency being difficult to coating on base material or supporter etc. as the composition of main component containing acrylic monomer mixture.But viscosity also containing isobutylene-based polymer, therefore can easily remain in above-mentioned scope by binder composition of the present invention except acrylic monomer mixture or its partial polymer.
In binder composition of the present invention, above-mentioned isobutylene-based polymer is easily dissolved in aforesaid propylene acrylic monomer mixture or its partial polymer, also viscosity can be remained in above-mentioned scope even if therefore do not add solvent.That is, binder composition of the present invention can not contain solvent.Time in binder layer of the present invention not containing solvent, do not need the heat drying after being coated with, more easily form binder layer.In addition, environment aspect and security are also excellent.
In addition, the viscosity of binder composition of the present invention can by coordinating example as the various component of polymer such as acrylic rubber, thickening property additive regulate.
Isobutylene-based polymer does not generally have cross-linking set, therefore can not form crosslinking structure, easily flows when high temperature, the poor durability sometimes under high temperature.In addition, isobutylene-based polymer in most cases viscosity, poor adhesion.But binder composition of the present invention contains acrylic monomer mixture or its partial polymer and isobutylene-based polymer, moisture resistance and the excellent binder layer of tackiness therefore can be formed.In addition, when binder layer has crosslinking structure, the weather resistance under high temperature can be improved especially.
For binder composition of the present invention, the Water Vapour Permeability measured by following method of the binder layer formed by binder composition is 100g/m 2below it, be preferably 80g/m 2below it, be more preferably 60g/m 2below it.
The measuring method of Water Vapour Permeability: use the test sample above obtained by the binder layer formed by binder composition (thickness 50 μm) being fitted to triacetylcellulose film (thickness 25 μm), according to the Water Vapour Permeability test method of JIS Z 0208, under following condition, measure Water Vapour Permeability:
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours.
In addition, in this specification sheets, sometimes by " Water Vapour Permeability measured by aforesaid method of the binder layer formed by binder composition " of binder composition referred to as " Water Vapour Permeability of the present invention ".
For binder composition of the present invention, Water Vapour Permeability of the present invention is 100g/m 2below it, therefore there is excellent moisture resistance.
[self adhesive tape or adhesive sheet]
Self adhesive tape of the present invention or adhesive sheet have the binder layer formed by binder composition of the present invention.That is, self adhesive tape of the present invention or adhesive sheet preferably have acrylic adhesive tape or the adhesive sheet of the acrylic adhesive layer formed by acrylic pressure-sensitive adhesive compositions.In this specification sheets, sometimes by self adhesive tape of the present invention or adhesive sheet referred to as " self adhesive tape of the present invention ".In addition, sometimes the binder layer formed by binder composition of the present invention is called " binder layer of the present invention ".
Self adhesive tape of the present invention can be that only one side is the single-sided adhesive tape of adhesive layer surface (adhesive face), can be also the double-faced adhesive tape of adhesive layer surface for two sides.Self adhesive tape of the present invention, is not particularly limited, and considers from for viewpoints such as adherend laminatings each other, is preferably double-faced adhesive tape.
Self adhesive tape of the present invention can for not have the self adhesive tape of base material (substrate layer), so-called " without base material type " self adhesive tape (being sometimes referred to as " without base material self adhesive tape "), can for having the self adhesive tape (being sometimes referred to as " band base material self adhesive tape ") of base material yet.As above-mentioned without base material self adhesive tape, can enumerate such as: only comprise the double-faced adhesive tape of binder layer of the present invention (binder layer formed by binder composition of the present invention) or comprise the double-faced adhesive tape etc. of the binder layer (being sometimes referred to as " other binder layer ") beyond binder layer of the present invention and binder layer of the present invention.As the above-mentioned self adhesive tape with base material, can enumerate such as: there is in the one side side of base material the single-sided adhesive tape of binder layer of the present invention, there is in the side, two sides of base material the double-faced adhesive tape of binder layer of the present invention or in an one side side of base material, there is binder layer of the present invention and there is in another one side side the double-faced adhesive tape etc. of other binder layer.
In addition, above-mentioned " base material (substrate layer) " refer to by self adhesive tape of the present invention for (pasting) adherend (optical component etc.) time paste part on adherend together with binder layer, the release liner (partition) peeled off when not comprising use (stickup) of self adhesive tape.
Wherein, self adhesive tape of the present invention is from tackling various mode in use, do not limit the mode of use, the viewpoint that can increase the selection of using method is considered, preferably without base material self adhesive tape, that more preferably only comprise binder layer of the present invention, that not there is base material double-faced adhesive tape (without base material double-faced adhesive tape).
(binder layer of the present invention)
Binder layer of the present invention is formed by binder composition of the present invention.The formation method of binder layer of the present invention is not particularly limited, and can enumerate such as: by binder composition of the present invention coating (coating) on the suitable supporter such as base material or release liner, and irradiate active energy beam.In addition, as required, heat drying can be carried out after coating.
In addition, time above-mentioned coating (coating), known coating method can be used.Such as usual coating machine can be used, gravure roll coating machine, reverse roll coating machine, touch roll coating machine, immersion roll-coater, metering bar coater, knife coater, spraying machine, comma coater, directly coating machine etc. can be used particularly.
When irradiating active energy beam after being coated with binder composition of the present invention, as the active energy beam irradiated, can enumerate such as: ionizing ray, the ultraviolets etc. such as alpha-ray, β ray, gamma-rays, neutron ray, electron rays, particularly preferably ultraviolet.In addition, the irradiation energy, irradiation time, illuminating method etc. of active energy beam are not particularly limited.
Binder layer of the present invention is at least containing the base polymer acrylic polymers of polymkeric substance (that is, based on) and the isobutylene-based polymer that derive from acrylic monomer mixture or its partial polymer.Binder layer of the present invention is not particularly limited, such as binder layer entirety can be the formation of evenly composition, also can by the part had within the adhesive layer containing more isobutylene-based polymer (such as, the part of the isobutylene-based polymer containing more than 60 ~ 80 % by weight) (being sometimes referred to as " isobutylene-based polymer part ") and containing the more part deriving from the acrylic polymers of polymkeric substance based on aforesaid propylene acrylic monomer mixture or its partial polymer (such as, the part of the base polymer containing more than 60 ~ 80 % by weight) formation of (being sometimes referred to as " acrylic polymer fraction ") formed.
Usually, binder layer is in most cases overall by formed uniformly, and entirety has uniform characteristic.Binder layer of the present invention (binder layer formed by binder composition of the present invention) preferably has the many parts of isobutylene-based polymer (such as, above-mentioned isobutylene-based polymer part) and based on the acrylic polymers of polymkeric substance many part (such as, the above-mentioned acrylic polymer fraction) structure of disperseing with atomic little distribution.That is, binder layer of the present invention preferably has the isolating construction (structure be separated) of acrylic polymers and isobutylene-based polymer as phase structure.When binder layer of the present invention has such structure, compared with uniform situation, moisture resistance, cohesive force (cohesive force particularly during high temperature) and each characteristic of tackiness can be obtained with higher level.That is, overall as binder layer, coherency when can realize moisture resistance, tackiness and high temperature with high level.This is because the Water Vapour Permeability of isobutylene-based polymer is low, and particularly moisture resistance is excellent, on the other hand, the Water Vapour Permeability of acrylic polymers is high, and moisture resistance is poor, but cohesive force particularly high temperature time cohesive force excellent, tackiness is excellent.In addition, binder composition of the present invention contains tackifying resin, and when binder layer of the present invention has such structure, tackifying resin is moderately distributed in the many parts of isobutylene-based polymer and the many part both sides of acrylic polymers.Therefore, when binder layer of the present invention contains tackifying resin, overall as binder layer, tackiness improves further and does not reduce moisture resistance.As the tackifying resin easily obtaining such characteristic, can enumerate such as: saturated hydrocarbons resin.
The ratio of the part (isobutylene-based polymer part as escribed above) that above-mentioned isobutylene-based polymer is many and the many part (acrylic polymer fraction as escribed above) of aforesaid propylene acids polymers, can be regulated by the content of above-mentioned isobutylene-based polymer, the illumination etc. of active energy beam in the content of aforesaid propylene acids mixture or its partial polymer in the percent polymerization of the such as partial polymer of acrylic monomer mixture, binder composition, binder composition.
The thickness of binder layer of the present invention is not particularly limited, and from the viewpoint of obtaining the viewpoint of excellent tackiness and suppressing the flowing of binder layer, is preferably 5 ~ 200 μm, is more preferably 10 ~ 100 μm.
In addition, binder layer of the present invention preferably has crosslinking structure.That is, the binder layer formed by binder composition of the present invention preferably has crosslinking structure.When having crosslinking structure, the thermostability of binder layer improves further.Such as, even if (under the temperature environment of such as 80 DEG C ~ 100 DEG C) is also not easy to produce binder layer flowing thus the problems such as stripping in high temperature environments.Crosslinking structure can obtain by using such as polyfunctional monomer or linking agent.
The gel fraction of binder layer of the present invention (binder layer formed by binder composition of the present invention) is not particularly limited, the flowing of the binder layer under the viewpoint, suppression high temperature of thermostability, be preferably more than 20 % by weight (such as 20 ~ 99.9 % by weight), be more preferably more than 30 % by weight (such as 30 ~ 99.9 % by weight), more preferably more than 50 % by weight (such as 50 ~ 99.9 % by weight), are more preferably more than 60 % by weight (such as 60 ~ 99.9 % by weight) further.
Above-mentioned gel fraction (the insoluble component content of solvent) is obtained in the following manner.
(measuring method of gel fraction)
Get about 0.1g binder layer, with porous tetrafluoroethylene sheet (trade(brand)name " NTF1122 ", the Nitto Denko Corp manufactures) parcel of mean pore size 0.2 μm, then tighten with kite string, measure weight now, using this weight as the front weight of dipping.In addition, before this dipping, weight is the gross weight of acrylic adhesive layer (above-mentioned got binder layer), tetrafluoroethylene sheet and kite string.In addition, the total weight of tetrafluoroethylene sheet and kite string is measured, using this weight as packing bag weight.
Then, by binder layer tetrafluoroethylene sheet parcel and the object tightened with kite string and obtain (being called " sample ") puts into the 50ml container being full of ethyl acetate, and 23 DEG C leave standstill 7 days.Then, take out sample (after ethyl acetate process) from container, transfer in aluminum cup, in drying machine, remove ethyl acetate, then gravimetry 130 DEG C of dryings 2 hours, using this weight as the rear weight of dipping.
Further, the insoluble component content of solvent is calculated by following formula.
The insoluble component content of solvent (% by weight)=(a-b)/(c-b) × 100
In above formula, a is weight after dipping, and b is packing bag weight, and c is weight before dipping.
In addition, binder layer of the present invention, from the viewpoint of obtaining excellent moisture resistance, the Water Vapour Permeability obtained by following measuring method is 100g/m 2it following (preferably 85g/m 2below it, be more preferably 70g/m 2it is following).
The measuring method of Water Vapour Permeability: use the test sample above obtained by binder layer (thickness 50 μm) being fitted to triacetylcellulose film (thickness 25 μm), according to the Water Vapour Permeability test method (agar diffusion method) of JIS Z 0208, under following condition, measure Water Vapour Permeability.More specifically, can be measured by the method recorded in " measuring method of Water Vapour Permeability " of (evaluation) described later.
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours.
In addition, the adhesive power of binder layer of the present invention (measure temperature: 23 DEG C, relative humidity 50%RH, draw speed: 300mm/ minute, peel angle: the stripping conditions of 180 °, to sheet glass) be not particularly limited, be preferably more than 1.0N/25mm, be more preferably more than 3.0N/25mm, more preferably more than 5.0N/25mm.By adhesive power in above-mentioned scope, aforesaid propylene acrylic binder layer is not implemented solidification treatment and has excellent tackiness.
The adhesive power of aforesaid propylene acrylic binder layer more specifically can be measured by the method recorded in " mensuration of adhesive power " of (evaluation) described later.
(base material)
As mentioned above, self adhesive tape of the present invention can at least having the band base material self adhesive tape of binder layer of the present invention and substrate layer.As above-mentioned base material, be not particularly limited, can preferably enumerate such as: plastic basis material (polymeric substrate).In addition, base material for the base material (single layer of substrate material) be made up of one deck, also can have two-layer above stepped construction (laminated substrate).
As the material forming above-mentioned plastic basis material, be not particularly limited, can enumerate such as: the polyester such as polyethylene terephthalate, PEN, polybutylene terephthalate, PBN; The polyolefine such as polyethylene, polypropylene, ethylene-propylene copolymer; Polyvinyl alcohol; Polyvinylidene dichloride; Polyvinyl chloride; Vinyl chloride vinyl acetate copolymer, polyvinyl acetate; Polymeric amide; Polyimide; The cellulose family such as triacetyl cellulose, diacetyl cellulose; Fluorine resin; Polyethers; Polyetheramides; Polyether-ether-ketone; Polyphenylene sulfide; The polystyrene resins such as polystyrene; Polycarbonate; Polyethersulfone; The acrylic resins etc. such as polymethylmethacrylate.In addition, above-mentioned materials may be used singly or two or more in combination.
Wherein, as the material forming above-mentioned plastic basis material, good from the viewpoint of the balance of intensity, operability (treatability), cost, dimensional stability, anchor force, preferred polyester or cellulose family, acrylic resin etc., more preferably polyethylene terephthalate (PET), triacetyl cellulose (TAC), polymethylmethacrylate (PMMA).That is, above-mentioned base material is preferably polyethylene terephthalate base material, triacetyl cellulose base material, polymethyl methacrylate base material.
Above-mentioned base material can implement surface treatment as required.As above-mentioned surface treatment, can enumerate such as: chromic acid process, be exposed to ozone, be exposed to flame, be exposed to high-voltage electric shock, process etc. that ionizing ray process etc. is undertaken by chemistry or physical method.In addition, can implement for improving the adhering prime treatment with binder layer.
In addition, from the viewpoint of the scratch resistance (scratch resistance) improving surface, above-mentioned base material can be implemented firmly to be coated with process.When implementing hard painting process to the surface of above-mentioned base material, substrate surface protectiveness (substrate surface is not easy the character producing cut) improves.In addition, produce from the viewpoint of suppression electrostatic, base material can implement anti-electrostatic process.
Above-mentioned base material can for such as to a face in order to improve and binder layer adhesivity and implement prime treatment, another face is implemented firmly be coated with the base material processed.
(other layer)
Self adhesive tape of the present invention, except binder layer of the present invention, base material, in the scope not damaging effect of the present invention, can have other layer (such as, middle layer, undercoat etc.).
(release liner)
As mentioned above, in self adhesive tape of the present invention, adhesive face can be protected by release liner.As above-mentioned release liner, be not particularly limited, can preferably enumerate known or usual release liner.Specifically, can preferably enumerate: by polyester resins such as polyethylene terephthalate (PET), PEN (PEN), polybutylene terephthalates (PBT); Polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), ethylene-propylene copolymer, vinyl-vinyl acetate copolymer (EVA) etc. are using alpha-olefin as the olefine kind resin of monomer component; Polyvinyl chloride (PVC); Vinyl acetate esters resin; Polycarbonate (PC); Polyphenylene sulfide (PPS); The amides resins such as polymeric amide (nylon), fully aromatic polyamide (aramid); Polyimide based resin; Polyether-ether-ketone (PEEK); The olefine kind resins such as polyethylene (PE), polypropylene (PP); The plastics film that the fluorine resins such as tetrafluoroethylene, polychlorotrifluoroethylene, fluorinated ethylene propylene, poly(vinylidene fluoride), tetrafluoraoethylene-hexafluoropropylene copolymer, chlorine vinyl fluoride-vinylidene fluoride copolymer etc. are formed.
In addition, as above-mentioned release liner, at least one low tackiness release liner etc. that there is the release liner of peel ply (lift-off processing layer) on the surface, comprise the low tackiness release liner of fluoropolymer, comprise non-polar polymer that can be set forth in release liner base material.In addition, the release liner base material (that is, release liner base material itself) without peel ply can be enumerated.As above-mentioned fluoropolymer, be not particularly limited, can enumerate such as: tetrafluoroethylene, polychlorotrifluoroethylene, fluorinated ethylene propylene, poly(vinylidene fluoride), tetrafluoraoethylene-hexafluoropropylene copolymer, chlorine vinyl fluoride-vinylidene fluoride copolymer etc.In addition, as above-mentioned non-polar polymer, be not particularly limited, can enumerate such as: the olefine kind resins etc. such as polyethylene (PE), polypropylene (PP).Wherein, at least one being preferably used in release liner base material has the release liner of peel ply on the surface, does not have the release liner base material of peel ply (that is, release liner base material itself).
As above-mentioned release liner base material, be not particularly limited, can plastics film etc. be enumerated.As such plastics film, can enumerate such as: by polyester resins such as polyethylene terephthalate (PET), PEN (PEN), polybutylene terephthalates (PBT); Polyethylene (PE), polypropylene (PP), polymethylpentene (PMP), ethylene-propylene copolymer, vinyl-vinyl acetate copolymer (EVA) etc. are using alpha-olefin as the olefine kind resin of monomer component; Polyvinyl chloride (PVC); Vinyl acetate esters resin; Polycarbonate (PC); Polyphenylene sulfide (PPS); The amides resins such as polymeric amide (nylon), fully aromatic polyamide (aramid); Polyimide based resin; The plastics film that polyether-ether-ketone (PEEK) etc. are formed.Wherein, consider from viewpoints such as processibility, availability, workability, dirt resistance, costs, the plastics film preferably formed by polyester resin, more preferably PET film.
As the stripping treatment agent forming above-mentioned peel ply, be not particularly limited, can enumerate such as: the stripping treatment agents such as polysiloxane-based stripping treatment agent, fluorine-containing type stripping treatment agent, chain alkyl class stripping treatment agent, moly-sulfide.Wherein, from the viewpoint of stripping control, ageing stability, preferred polysiloxane-based stripping treatment agent.In addition, stripping treatment agent may be used singly or two or more in combination.
Above-mentioned release liner can be manufactured by known customary way.In addition, the thickness of above-mentioned release liner is not particularly limited.
(manufacture method)
The manufacture method of self adhesive tape of the present invention is not particularly limited, and can use known formation method.Such as, when self adhesive tape of the present invention is band base material self adhesive tape, binder layer of the present invention can be formed make by binder composition of the present invention by least one side, face at above-mentioned base material.In addition, self adhesive tape of the present invention be comprise binder layer of the present invention without base material self adhesive tape when, can by being formed binder layer of the present invention to make by binder composition of the present invention on release liner.
(physical property)
Self adhesive tape of the present invention, is not particularly limited, and from the viewpoint of obtaining excellent moisture resistance, the Water Vapour Permeability of being tried to achieve by following measuring method is preferably 100g/m 2below it, be more preferably 80g/m 2below it, more preferably 60g/m 2below it.
The measuring method of Water Vapour Permeability: using the test sample above obtained by self adhesive tape being fitted to triacetylcellulose film (thickness 25 μm), according to the Water Vapour Permeability test method of JIS Z 0208, measuring Water Vapour Permeability under following condition:
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours.
The adhesive power of self adhesive tape of the present invention (measure temperature: 23 DEG C, relative humidity 50%RH, draw speed: 300mm/ minute, peel angle: the stripping conditions of 180 °, to sheet glass) be not particularly limited, be preferably more than 1.0N/25mm, be more preferably more than 3.0N/25mm, more preferably more than 5.0N/25mm.By adhesive power in above-mentioned scope, self adhesive tape of the present invention is not implemented solidification treatment and has excellent tackiness.
The adhesive power of self adhesive tape of the present invention more specifically can be measured by the method recorded in " mensuration of adhesive power " of (evaluation) described later.
The thickness of self adhesive tape of the present invention is not particularly limited, and is preferably 5 ~ 200 μm, is more preferably 10 ~ 100 μm.
Self adhesive tape of the present invention has binder layer of the present invention, therefore after laminating, does not implement solidification treatment and can play sufficient tackiness to adherend, and moisture resistance is excellent.In addition, adherend can be protected from moisture.
Self adhesive tape of the present invention is not implemented solidification treatment and can be played the sufficient adhesive power of adherend and moisture resistance is excellent, therefore, may be used for the protection purposes etc. of the adherend not tolerating humidity.Such as, self adhesive tape of the present invention can use as protective film.
Self adhesive tape of the present invention has above-mentioned characteristic, therefore may be used for such as electrically or electronics etc. (such as, to be not resistance toly heated, humidity, ultraviolet electrically or electronics etc.).Particularly, can be preferred for electrically or electronic equipment manufacturing time surface protection purposes, electrically or electronics uses time surface protection purposes etc.In addition, optical applications (the surface protection purposes etc. when surface protection purposes, optical goods or optical component when such as, optical goods or optical component manufacture use) can be preferred for.
As above-mentioned electric installation, be not particularly limited, can enumerate such as: home appliance, the air-conditioner outdoor units etc. such as televisor, refrigerator, washing machine, suction cleaner.In addition, as above-mentioned electronics, be not particularly limited, can enumerate such as: the mobile equipments such as the image display device such as liquid-crystal display, plasma display, mobile phone, smart mobile phone, tablet PC (plate computer), notebook computer, portable data assistance (PDA), portable music player, portable game machine, portable television.
Above-mentioned optical goods refer to the goods utilizing optical characteristics (such as, polarizability, light refraction, light scattering, light reflective, transmitance, light absorption, optical diffraction, opticity, visuality etc.) in these goods.As above-mentioned optical goods, can enumerate such as: input units such as display unit or contact panel such as liquid crystal indicator, PDP (Plasmia indicating panel), Electronic Paper or by these display unit and the appropriately combined device etc. of input unit.
Above-mentioned optical component refers to the component with above-mentioned optical characteristics.As above-mentioned optical component, can enumerate such as: form above-mentioned display unit (image display device), the component used in the component of the equipment such as above-mentioned input unit (optical device) or these equipment, such as polarization plates can be enumerated, wavelength plate, polarizer, optical compensating film, brightness enhancement film, light guiding plate, reflective film, antireflective film, transparent conductive film (ito thin film), appearance design film, decorating film, surface protection board, prism, lens, colored filter, transparency carrier, and their components (sometimes they being referred to as " optical thin film ") etc. of being laminated.In addition, above-mentioned " plate " and " film " comprises the forms such as tabular, film like, sheet separately, and such as, " polarization film " comprises " polarization plates ", " polaroid ".In addition, " optical component " in the present invention plays the component (appearance design film, decorating film, surface protective film etc.) of the effect of decoration or protection while being also included within as mentioned above and keeping the visuality of the display part in display unit or input unit and excellent outward appearance.
More specifically, self adhesive tape of the present invention can be preferred for the surface protection purposes of thin layer display member (such as using the contact panel etc. of LCD), thin layer display unit (such as LCD or the colored filter that wherein uses), pattern recognition component, thin layer optical thin film (such as polarization plates etc.), electronics (particularly sheet electron equipment) etc.
Embodiment
Below, the present invention will be described in more detail to enumerate embodiment and comparative example, but the present invention is by any restriction of these examples.
(embodiment 1)
By butyl acrylate (BA) 80 weight part, the mixing of vinylformic acid (AA) 0.8 weight part, obtain acrylic monomer mixture.
In this acrylic monomer mixture 80 weight part, add styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062M ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 48000, vinylbenzene containing ratio 20%) 20 weight parts, Viscoat 295 (TMPTA, polyfunctional monomer) 0.08 weight part, alicyclic saturated hydrocarbon resinoid (trade(brand)name " ア Le コ Application P125 ", Arakawa Chemical Industries, Ltd. manufactures) 6 weight parts, 1-hydroxycyclohexyl phenyl ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure184 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part and 2, 2-dimethoxy-1, 2-diphenylethane-1-ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure651 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part, and Homogeneous phase mixing, thus obtain acrylic pressure-sensitive adhesive compositions.
Aforesaid propylene acrylic binder composition is applied to release liner (trade(brand)name " MRF#38 ", Mitsubishi Plastics Inc manufacture) on the face of lift-off processing, the thickness making the binder layer formed is 50 μm, thus forms acrylic pressure-sensitive adhesive compositions layer.Then, at the surface of acrylic pressure-sensitive adhesive compositions layer laminating release liner (" MRE#38 ", Mitsubishi Plastics Inc manufactures).Then, using black lamp (Toshiba Corporation's manufacture) to irradiate 360 seconds illumination is 5mW/cm 2ultraviolet, make acrylic pressure-sensitive adhesive compositions layer photocuring, thus formed acrylic adhesive layer.
In addition, ultraviolet illumination uses industrial UV detector (trade(brand)name " UVR-T1 ", Co., Ltd. ト プ コ Application テ Network ノ Ha ウ ス manufactures, and has peak response at about 350nm) to regulate.
So, made acrylic adhesive tape (two sides of binder layer by release liner protect without base material type double-faced adhesive tape).
(embodiment 2)
By butyl acrylate (BA) 38 weight part, 2-EHA (2EHA) 38 weight part, the mixing of vinylformic acid (AA) 4 weight part, obtain acrylic monomer mixture.
In this acrylic monomer mixture 80 weight part, add styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062M ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 48000, vinylbenzene containing ratio 20%) 20 weight parts, Viscoat 295 (TMPTA, polyfunctional monomer) 0.08 weight part, alicyclic saturated hydrocarbon resinoid (trade(brand)name " ア Le コ Application P115 ", Arakawa Chemical Industries, Ltd. manufactures) 18 weight parts, 1-hydroxycyclohexyl phenyl ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure184 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part and 2, 2-dimethoxy-1, 2-diphenylethane-1-ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure651 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part, and Homogeneous phase mixing, thus obtain acrylic pressure-sensitive adhesive compositions.
Aforesaid propylene acrylic binder composition is applied to release liner (trade(brand)name " MRF#38 ", Mitsubishi Plastics Inc manufacture) on the face of lift-off processing, the thickness making the binder layer formed is 50 μm, thus forms acrylic pressure-sensitive adhesive compositions layer.Then, at the surface of acrylic pressure-sensitive adhesive compositions layer laminating release liner (" MRE#38 ", Mitsubishi Plastics Inc manufactures).Then, using black lamp (Toshiba Corporation's manufacture) to irradiate 360 seconds illumination is 5mW/cm 2ultraviolet, make acrylic pressure-sensitive adhesive compositions layer photocuring, thus formed acrylic adhesive layer.
In addition, ultraviolet illumination uses industrial UV detector (trade(brand)name " UVR-T1 ", Co., Ltd. ト プ コ Application テ Network ノ Ha ウ ス manufactures, and has peak response at about 350nm) to regulate.
So, made acrylic adhesive tape (two sides of binder layer by release liner protect without base material type double-faced adhesive tape).
(embodiment 3)
By 2-EHA (2EHA) 59.1 weight part, the mixing of vinylformic acid (AA) 5.9 weight part, obtain acrylic monomer mixture.
In this acrylic monomer mixture 80 weight part, add styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062T ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 60,000, vinylbenzene containing ratio 20%) 35 weight parts, Viscoat 295 (TMPTA, polyfunctional monomer) 0.3 weight part, alicyclic saturated hydrocarbon resinoid (trade(brand)name " ア Le コ Application P125 ", Arakawa Chemical Industries, Ltd. manufactures) 10.5 weight parts, 1-hydroxycyclohexyl phenyl ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure184 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part and 2, 2-dimethoxy-1, 2-diphenylethane-1-ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure651 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part, and Homogeneous phase mixing, thus obtain acrylic pressure-sensitive adhesive compositions.
Aforesaid propylene acrylic binder composition is applied to release liner (trade(brand)name " MRF#38 ", Mitsubishi Plastics Inc manufacture) on the face of lift-off processing, the thickness making the binder layer formed is 75 μm, thus forms acrylic pressure-sensitive adhesive compositions layer.Then, at the surface of adhesive composition layer laminating release liner (" MRE#38 ", Mitsubishi Plastics Inc manufactures).Then, using black lamp (Toshiba Corporation's manufacture) to irradiate 360 seconds illumination is 5mW/cm 2ultraviolet, make acrylic pressure-sensitive adhesive compositions layer photocuring, thus formed acrylic adhesive layer.
In addition, ultraviolet illumination uses industrial UV detector (trade(brand)name " UVR-T1 ", Co., Ltd. ト プ コ Application テ Network ノ Ha ウ ス manufactures, and has peak response at about 350nm) to regulate.
So, made acrylic adhesive tape (two sides of binder layer by release liner protect without base material type double-faced adhesive tape).
(comparative example 1)
By 2-EHA (2EHA) 85 weight part, the mixing of vinylformic acid (AA) 5 weight part, obtain acrylic monomer mixture.
This acrylic monomer mixture is put in four-hole boiling flask.Then, drop into 1-hydroxycyclohexyl phenyl ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure184 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part and 2,2-dimethoxy-1,2-diphenylethane-1-ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure651 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part, and to nitrogen injection in four-hole boiling flask.Then, in a nitrogen atmosphere, irradiation ultraviolet radiation, there is photopolymerization, thus obtain viscosity (BH type viscometer, No. 5 rotors, 10rpm, 30 DEG C) be the partially polymerized monomer slurry (partial polymer of acrylic monomer mixture) of about 15Pas.
In this partially polymerized monomer slurry 80 weight part, add styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062T ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 60,000, vinylbenzene containing ratio 20%) 10 weight parts, Viscoat 295 (TMPTA, polyfunctional monomer) 0.3 weight part, 1-hydroxycyclohexyl phenyl ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure184 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part and 2, 2-dimethoxy-1, 2-diphenylethane-1-ketone (Photoepolymerizationinitiater initiater, trade(brand)name " Irgacure651 ", BASF Amada Co., Ltd. manufactures) 0.05 weight part, and Homogeneous phase mixing, thus obtain acrylic pressure-sensitive adhesive compositions.
Aforesaid propylene acrylic binder composition is applied to release liner (trade(brand)name " MRF#38 ", Mitsubishi Plastics Inc manufacture) on the face of lift-off processing, the thickness making the binder layer formed is 45 μm, thus forms acrylic pressure-sensitive adhesive compositions layer.Then, at the surface of adhesive composition layer laminating release liner (" MRE#38 ", Mitsubishi Plastics Inc manufactures).Then, using black lamp (Toshiba Corporation's manufacture) to irradiate 360 seconds illumination is 5mW/cm 2ultraviolet, make acrylic pressure-sensitive adhesive compositions layer photocuring, thus formed acrylic adhesive layer.
In addition, ultraviolet illumination uses industrial UV detector (trade(brand)name " UVR-T1 ", Co., Ltd. ト プ コ Application テ Network ノ Ha ウ ス manufactures, and has peak response at about 350nm) to regulate.
So, made acrylic adhesive tape (two sides of binder layer by release liner protect without base material type double-faced adhesive tape).
(measuring method of the Water Vapour Permeability of binder composition)
Binder composition is applied to release liner (trade(brand)name " MRF#38 ", Mitsubishi Plastics Inc manufacture) on the face of lift-off processing, the thickness making the binder layer formed is 50 μm, thus forms adhesive composition layer.Then, at the surface of adhesive composition layer laminating release liner (" MRE#38 ", Mitsubishi Plastics Inc manufactures).Then, using black lamp (Toshiba Corporation's manufacture) to irradiate 360 seconds illumination is 5mW/cm 2ultraviolet, make adhesive composition layer photocuring, thus formed binder layer.So, the adhesive sheet that the two sides obtaining binder layer is protected by release liner.
In addition, ultraviolet illumination uses industrial UV detector (trade(brand)name " UVR-T1 ", Co., Ltd. ト プ コ Application テ Network ノ Ha ウ ス manufactures, and has peak response at about 350nm) to regulate.
Then, this adhesive sheet release liner is peeled off, adhesive face is exposed, fit to triacetylcellulose film (TAC film, thickness 25 μm, Konica-Minolta Co., Ltd manufactures) on, make the self adhesive tape be laminated with the order of release liner, binder layer, TAC film.Then, from this self adhesive tape, release liner is peeled off, thus obtain working sample.
Then, use this test sample, under the following conditions, measure Water Vapour Permeability (water vapour permeability) by Water Vapour Permeability test method (agar diffusion method, based on JIS Z 0208).
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours
In addition, constant temperature and humidity cabinet is used during mensuration.
(evaluation)
Adhesive power etc. is measured for the self adhesive tape obtained in the above embodiments and comparative example.Measurement result is as shown in table 1.
(mensuration of adhesive power)
The bonding strap of length 100mm, width 25mm is obtained by self adhesive tape.Then, from bonding strap, a release liner is peeled off and adhesive face is exposed, this adhesive face of bonding strap is fitted PET film (thickness 25 μm), makes the band base material single-sided adhesive tape (length 100mm, width 25mm) be laminated with the order of release liner, binder layer, PET film.From this band base material single-sided adhesive tape, release liner is peeled off, thus obtain test sample.
Then, 23 DEG C, under the environment of 50%RH, the adhesive face (mensuration face) exposed of test sample to be fitted sheet glass (" soda-lime glass #0050 ", Song Langxiaozi Industrial Co., Ltd manufacture), once come and go by making 2kg roller and crimp.Then, 23 DEG C, place 30 minutes in the environment of 50%RH.
After placement, use tensile testing machine (trade(brand)name " TCM-1kNB ", ミ ネ ベ ア company manufactures), carry out 180 ° of stripping tests of peeling off test sample from sheet glass, measure the 180 ° of peel adhesion (180 degree of peel adhesion) (N/25mm) to sheet glass.Be determined at 23 DEG C, under the environment of 50%RH, carry out under the condition of peel angle 180 °, draw speed 300mm/ minute.
(measuring method of gel fraction)
The gel fraction of binder layer is measured by above-mentioned method.
Table 1
In above-mentioned table 1, " isolating construction " in phase structure one hurdle of acrylic adhesive layer refers in acrylic adhesive layer, acrylic polymers and isobutylene-based polymer are not a phase on the whole, but acrylic polymers and isobutylene-based polymer are separated.
In above-mentioned table 1, following is expressed as following implication.
BA: butyl acrylate
2EHA: 2-EHA
AA: vinylformic acid
TMPTA: Viscoat 295
SIBSTAR-062M: styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062M ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 48000, vinylbenzene containing ratio 20%)
SIBSTAR-062T: styreneisobutylene-styrene copolymer (trade(brand)name " SIBSTAR-062T ", Co., Ltd. カ ネ カ manufactures, weight-average molecular weight 60,000, vinylbenzene containing ratio 20%)
ア Le コ Application P115: alicyclic saturated hydrocarbon resinoid (trade(brand)name " ア Le コ Application P115 ", Arakawa Chemical Industries, Ltd. manufactures)
ア Le コ Application P125: alicyclic saturated hydrocarbon resinoid (trade(brand)name " ア Le コ Application P125 ", Arakawa Chemical Industries, Ltd. manufactures)

Claims (6)

1. a binder composition, it contains acrylic monomer mixture or its partial polymer and isobutylene-based polymer, it is characterized in that,
The binder layer formed by described binder composition, the Water Vapour Permeability that measured by following method is 100g/m 2below it,
The measuring method of Water Vapour Permeability: use the test sample above obtained by the binder layer formed by described binder composition (thickness 50 μm) being fitted to triacetylcellulose film (thickness 25 μm), according to the Water Vapour Permeability test method of JIS Z 0208, under following condition, measure Water Vapour Permeability:
Measure temperature: 40 DEG C
Relative humidity: 90%
Minute: 24 hours.
2. binder composition as claimed in claim 1, wherein, the adhesive power of the binder layer formed by described binder composition is more than 1.0N/25mm.
3. binder composition as claimed in claim 1 or 2, wherein, the content of described isobutylene-based polymer is more than 15 weight parts relative to described acrylic monomer mixture or its partial polymer 100 weight part.
4. the binder composition according to any one of claims 1 to 3, wherein, the binder layer formed by described binder composition has crosslinking structure.
5. the binder composition according to any one of Claims 1 to 4, wherein, the gel fraction of the binder layer formed by described binder composition is more than 20 % by weight.
6. self adhesive tape or an adhesive sheet, is characterized in that, has the binder layer that the binder composition according to any one of Claims 1 to 5 is formed.
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