WO2016153294A1 - 접착제 조성물 - Google Patents
접착제 조성물 Download PDFInfo
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- WO2016153294A1 WO2016153294A1 PCT/KR2016/003004 KR2016003004W WO2016153294A1 WO 2016153294 A1 WO2016153294 A1 WO 2016153294A1 KR 2016003004 W KR2016003004 W KR 2016003004W WO 2016153294 A1 WO2016153294 A1 WO 2016153294A1
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/66—Substances characterised by their function in the composition
- C08L2666/78—Stabilisers against oxidation, heat, light or ozone
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
Definitions
- the present application relates to an adhesive composition, an organic electronic device including the same, and a manufacturing method of the organic electronic device.
- An organic electronic device refers to a device including an organic material layer that generates an exchange of electric charges using holes and electrons, and examples thereof include a photovoltaic device, a rectifier, Transmitters and organic light emitting diodes (OLEDs); and the like.
- organic light emitting diodes have low power consumption, fast response speed, and are advantageous for thinning a display device or lighting, as compared with conventional light sources.
- OLED has excellent space utilization, and is expected to be applied in various fields including various portable devices, monitors, notebooks, and TVs.
- Patent document 1 is an adhesive encapsulation composition film and an organic electroluminescent element, which is poor in workability with an adhesive based on PIB (polyisobutylene) and poor in high temperature and high humidity conditions.
- PIB polyisobutylene
- Patent Document 1 Korean Unexamined Patent No. 2008-0088606
- the present application is possible to form a structure that can effectively block the moisture or oxygen flowing into the organic electronic device from the outside to ensure the life of the organic electronic device, it is possible to implement the top-emitting organic electronic device, the water blocking An adhesive composition having excellent durability and excellent durability at high temperature and high humidity, and an organic electronic device including the same are provided.
- the present application relates to an adhesive composition.
- the adhesive composition may be, for example, an encapsulant applied to encapsulating or encapsulating an organic electronic device such as an OLED.
- the adhesive composition of the present application can be applied to encapsulating or encapsulating at least one side of the organic electronic device.
- the adhesive composition may be present at the periphery of the organic electronic device.
- organic electronic device means an article or device having a structure including an organic material layer that generates an exchange of electric charge using holes and electrons between a pair of electrodes facing each other.
- the photovoltaic device, a rectifier, a transmitter, and an organic light emitting diode (OLED) may be mentioned, but is not limited thereto.
- the organic electronic device may be an OLED.
- Exemplary adhesive compositions may comprise an olefinic resin, a thermosetting resin, a photocurable compound having a water vapor transmission rate of 50 g / m 2 ⁇ day or less.
- a thermosetting resin and a photocurable compound together with an olefin resin having a low moisture permeability, it is possible to provide excellent durability reliability at high temperature and high humidity while achieving excellent moisture barrier performance.
- the sealing of the side surface of the organic electronic device is subjected to a process of applying a liquid adhesive composition
- a liquid adhesive composition there is a conventional problem of difficult to maintain the desired encapsulation shape due to the high fluidity of the composition after application.
- the present application is to proceed to the curing by irradiating light to the adhesive composition applied to the desired position, the curing can be carried out after the thermal curing can proceed. Accordingly, the present application can maintain the applied adhesive composition in the desired encapsulation shape until main curing. That is, the present application may include a thermosetting resin and a photocurable compound together, thereby introducing a dual curing method, thereby allowing flow control at a high temperature after the adhesive composition is applied.
- the adhesive composition of the present application may include an olefin resin having a water vapor transmission rate of 50 g / m 2 ⁇ day or less.
- an olefin resin having a water vapor transmission rate of 50 g / m 2 ⁇ day or less refers to a water vapor transmission rate measured for the thickness direction of the film in a state in which the resin is manufactured in a film form formed of a resin layer having a thickness of 100 ⁇ m.
- Transmission Rate may refer to a resin measured below 50 g / m 2 ⁇ day.
- the water vapor transmission rate is 50 g / m 2 ⁇ day or less, 40 g / m 2 ⁇ day or less, 30 g / m 2 ⁇ day or less, 20 g / m 2 ⁇ day or less or 10 under 100 ° F. and 100% relative humidity. g / m 2 ⁇ day or less.
- exemplary olefinic resins of the present application include resins derived from mixtures of monomers, which mixtures may have at least 4 to 7 isoolefin monomer components or multiolefin monomer components.
- Isoolefins can be present, for example, in the range of 70 to 100 weight percent, or 85 to 99.5 weight percent, by total monomer weight.
- the multiolefin derived component may be present in the range of 0.5 to 30 weight percent, 0.5 to 15 weight percent, or 0.5 to 8 weight percent.
- Isoolefins are, for example, isobutylene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene, 1-butene, 2-butene, methyl vinyl ether, indene, Vinyltrimethylsilane, hexene, or 4-methyl-1-pentene can be exemplified.
- Multiolefins may have 4 to 14 carbon atoms, for example isoprene, butadiene, 2,3-dimethyl-1,3-butadiene, myrcene, 6,6-dimethyl-pulbene, hexadiene, cyclopentadiene, or Piperylylene can be exemplified.
- Other polymerizable monomers such as styrene and dichlorostyrene can also be homopolymerized or copolymerized.
- the olefin resin may include isobutylene homopolymer or copolymer.
- isobutylene-based olefinic resins or polymers may refer to olefinic resins or polymers comprising at least 70 mol% repeating units and one or more other polymerizable units from isobutylene.
- the olefinic resin may be butyl rubber or branched butyl rubber.
- Exemplary olefinic resins are copolymers of unsaturated butyl rubbers such as olefins or isoolefins with multiolefins.
- the olefin resin included in the adhesive composition of the present invention poly (isobutylene-co-isoprene), polyisoprene, polybutadiene, polyisobutylene, poly (styrene-co-butadiene), natural rubber, butyl rubber, and Mixtures of these can be exemplified.
- the olefinic resins useful in the present application may be prepared by any suitable means known in the art, and the present invention is not limited thereto by the method of making the olefinic resin.
- the olefin resin may be a low molecular weight polyisobutylene resin.
- the olefin resin may have a weight average molecular weight of 100,000 or less and 500 or more or 55,000 or more.
- the present application can implement the adhesive composition suitable for the coating and encapsulation process by controlling the weight average molecular weight of the olefin resin in the above range.
- the adhesive composition may have a liquid form and may be appropriately applied to the side bag of the organic electronic device described below.
- the olefin resin may be a resin having at least one or more reactive functional groups reactive with the aforementioned thermosetting resin.
- the reactive functional group included in the olefin resin may be a polar functional group.
- the kind of the reactive functional group is not particularly limited, and examples thereof include acid anhydride groups, carboxyl groups, epoxy groups, amino groups, hydroxy groups, isocyanate groups, oxazoline groups, oxetane groups, cyanate groups, phenol groups, hydrazide groups, Or an amide group.
- olefinic resin having the reactive functional group examples include succinic anhydride modified polyisobutylene, maleic anhydride modified liquid polyisobutylene, maleic anhydride modified liquid polyisoprene, epoxy modified polyisoprene, and hydroxyl group modified liquid. Polyisoprene or allyl modified liquid polyisoprene.
- the present application may provide an adhesive having a physical property such as moisture barrier properties, durability reliability, etc. which are desired in the present application after curing by forming a crosslinked structure with the thermosetting resin which the olefin resin as described above will be described later.
- the adhesive composition may include a thermosetting resin.
- the thermosetting resin may be a resin including at least one thermosetting functional group.
- the specific kind of curable resin that can be used in the present application is not particularly limited, and for example, various thermosetting resins known in the art may be used.
- thermosetting resin means a resin that can be cured through an appropriate heat application or aging process
- photocurable compound refers to a resin that can be cured by irradiation of electromagnetic waves. it means.
- thermosetting resin in the present application is not particularly limited as long as it has the aforementioned characteristics.
- a resin containing at least one thermosetting functional group such as epoxy group, glycidyl group, isocyanate group, hydroxy group, carboxyl group or amide group.
- specific types of the resin may include an acrylic resin, a polyester resin, an isocyanate resin or an epoxy resin, but is not limited thereto.
- an epoxy acrylate or a urethane acrylate may be exemplified. Can be.
- thermosetting resin aromatic or aliphatic; Or an epoxy resin of linear or branched chain type can be used.
- an epoxy resin having an epoxy equivalent of 180 g / eq to 1,000 g / eq may be used as containing two or more functional groups.
- an epoxy resin having an epoxy equivalent in the above range it is possible to effectively maintain properties such as adhesion performance and glass transition temperature of the cured product.
- epoxy resins include cresol novolac epoxy resins, bisphenol A epoxy resins, bisphenol A novolac epoxy resins, phenol novolac epoxy resins, tetrafunctional epoxy resins, biphenyl epoxy resins, and triphenol methane types.
- a kind or mixture of an epoxy resin, an alkyl modified triphenol methane epoxy resin, a naphthalene type epoxy resin, a dicyclopentadiene type epoxy resin, or a dicyclopentadiene modified phenol type epoxy resin is mentioned.
- an epoxy resin containing a cyclic structure in a molecular structure can be used as the thermosetting resin, for example, an alicyclic epoxy resin can be used.
- the cycloaliphatic epoxy resin has excellent compatibility with an olefinic resin or a photocurable compound, and may be cured without phase separation to realize uniform crosslinking of the adhesive.
- the thermosetting resin may be included in 10 to 70 parts by weight based on 100 parts by weight of the olefin resin.
- the curable compound may be included in an amount of 15 to 65 parts by weight, 20 to 60 parts by weight, or 26 to 55 parts by weight based on 100 parts by weight of the olefin resin.
- the present application may provide an adhesive composition excellent in durability and long-term reliability by controlling the content of the thermosetting resin in the above range.
- the adhesive composition may include a thermosetting agent.
- a thermosetting agent an appropriate kind may be selected and used according to the kind of the functional group contained in the thermosetting resin or the thermosetting resin.
- the curing agent may be a curing agent of an epoxy resin known in the art, for example, an amine curing agent, an imidazole curing agent, a phenol curing agent, a phosphorus curing agent or an acid anhydride curing agent.
- an epoxy resin known in the art, for example, an amine curing agent, an imidazole curing agent, a phenol curing agent, a phosphorus curing agent or an acid anhydride curing agent.
- One kind or more than one kind may be used, but is not limited thereto.
- thermosetting agent an imidazole compound which is solid at room temperature and has a melting point or decomposition temperature of 80 ° C. or more may be used.
- an imidazole compound which is solid at room temperature and has a melting point or decomposition temperature of 80 ° C. or more may be used.
- the content of the thermosetting agent may be selected according to the composition of the composition, for example, the kind or proportion of the thermosetting resin.
- the thermosetting agent may include 1 part by weight to 30 parts by weight, 5 parts by weight to 28 parts by weight, or 5 parts by weight to 27 parts by weight with respect to 100 parts by weight of the thermosetting resin.
- the weight ratio may be adjusted according to the type and ratio of the thermosetting resin or the functional group of the thermosetting resin, or the crosslinking density to be implemented.
- the thermosetting agent may be a latent curing agent such as imidazole-isocyanuric acid adduct, amine-epoxy adduct, boron trifluoride-amine complex or encapsulated imidazole. That is, the radical initiator to be described later may be an optical radical initiator, and the present application, since light irradiation proceeds first to control initial fluidity in the curing process of the adhesive composition, the thermosetting agent is a latent curing agent in the step of applying heat after light irradiation. As a result, the thermosetting resin can be cured.
- the radical initiator to be described later may be an optical radical initiator
- the adhesive composition may include a photocurable compound.
- the photocurable compound may be a radical photocurable compound.
- the radical photocurable compound may include, for example, a polyfunctional polymerizable compound having high compatibility with the above-described olefin resin and thermosetting resin and capable of forming a specific crosslinked structure.
- the crosslinked structure may be a crosslinked structure formed by application of heat, a crosslinked structure formed by irradiation of active energy rays, or a crosslinked structure formed by aging at room temperature.
- active energy rays not only microwaves, infrared rays (IR), ultraviolet rays (UV), X rays and gamma rays, but also alpha-particle beams and proton beams , Particle beams such as neutron beams or electron beams, and the like, and typically may be ultraviolet rays or electron beams.
- the photocurable compound may be a polyfunctional active energy ray polymerizable compound
- the multifunctional active energy ray polymerizable compound may, for example, participate in a polymerization reaction by irradiation of active energy rays.
- 2 or more functional groups such as a functional group containing an ethylenically unsaturated double bond, such as an acryloyl group, a methacryloyl group, an acryloyloxy group, or a methacryloyloxy group, an epoxy group, or an oxetane group It may mean a compound to.
- the multifunctional active energy ray polymerizable compound may be a bifunctional or higher compound.
- multifunctional active energy ray polymerizable compound for example, multifunctional acrylate (MFA) may be used.
- MFA multifunctional acrylate
- the photocurable compound may satisfy the following Formula 1.
- R 1 is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 2 or more
- X represents a residue derived from a straight, branched or cyclic alkyl group having 3 to 30 carbon atoms or an alkenyl group.
- X is, for example, a ring having 3 to 30 carbon atoms, 4 to 28 carbon atoms, 6 to 28 carbon atoms, 8 to 22 carbon atoms, or 12 to 20 carbon atoms. It may be a residue derived from a type alkyl group or alkenyl group.
- X when X is a residue derived from a linear alkyl group or an alkenyl group, X may be a residue derived from a straight alkyl group or alkenyl group having 3 to 30 carbon atoms, 6 to 25 carbon atoms or 8 to 20 carbon atoms. have.
- X when X is a residue derived from a branched alkyl or alkenyl group, X is a residue derived from a branched alkyl or alkenyl group having 3 to 30 carbon atoms, 4 to 28 carbon atoms, 5 to 25 carbon atoms, or 6 to 20 carbon atoms. It may be a flag.
- the term “residue derived from an alkyl group or an alkenyl group” may mean a residue composed of an alkyl group or an alkenyl group as a residue of a specific compound.
- X when n is 2, X may be an alkylene group or an alkylidene group.
- X when n is 3 or more, X may be bonded to the (meth) acryloyl group of Formula 1 by desorbing two or more hydrogens of an alkyl group or an alkenyl group.
- n may be 2 to 20.
- alkyl group or “alkenyl group” includes 1 to 30 carbon atoms, 1 to 25 carbon atoms, 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, and 1 to 8 carbon atoms. Or an alkyl group or alkenyl group having 1 to 4 carbon atoms.
- the alkyl group or alkenyl group may have a linear, branched or cyclic structure, and may be optionally substituted with one or more substituents.
- alkylene group or “alkylidene group” includes 2 to 30 carbon atoms, 2 to 25 carbon atoms, 2 to 20 carbon atoms, 2 to 16 carbon atoms, and 2 to 12 carbon atoms. It may mean an alkylene group or an alkylidene group having 2 to 10 carbon atoms or 2 to 8 carbon atoms.
- the alkylene group or alkylidene group may have a linear, branched or cyclic structure, and may be optionally substituted with one or more substituents.
- alkoxy group may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified.
- the alkoxy group may be linear, branched or cyclic.
- the alkoxy group may be optionally substituted with one or more substituents.
- the photocurable compound is 10 parts by weight to 100 parts by weight, 10 parts by weight to 80 parts by weight, 13 parts by weight to 60 parts by weight, 14 parts by weight to 40 parts by weight, or 14 parts by weight to 20 parts by weight of the olefin resin. It may be included in parts by weight.
- the present application may provide a cured adhesive of the extent to maintain the encapsulation structure during the temporary curing by adjusting the content of the photocurable compound in the above range.
- the polyfunctional active energy ray-polymerizable compound which can be polymerized by irradiation of the active energy ray is polybutadiene dimethacrylate, 1,4-butanediol di (meth) acrylate, 1,3-butyl Lene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,8-octanediol di (meth) acrylate, 1,12-dodecanediol di (meth) acrylic Latex, neopentylglycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, cyclohexane-1,4-dimethanol di (meth) acrylate, tricyclodecane dimethanol (meth) di Acrylate, dimethylol dicyclopentane di (meth) acrylate, neopentylglycol modified trimethyl
- the adhesive composition may include a radical initiator with the photocurable compound.
- the radical initiator may be a photoradical initiator.
- Specific types of the photoinitiator may be appropriately selected in consideration of the curing rate and the possibility of yellowing. For example, a benzoin type, a hydroxy ketone type, an amino ketone type, or a phosphine oxide type photoinitiator etc.
- benzoin benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether , Benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylanino acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2 -Hydroxy-2-methyl-1-phenylpropane-1one, 1-hydroxycyclohexylphenylketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1- On, 4- (2-hydroxyethoxy) phenyl-2- (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-
- the content of the photoradical initiator may be changed depending on the type and ratio of the functional group of the photocurable compound, the crosslinking density to be implemented, and the like.
- the optical radical initiator may be blended in a ratio of 0.1 part by weight to 20 parts by weight or 0.1 part by weight to 15 parts by weight with respect to 100 parts by weight of the photocurable compound. According to the present invention, by controlling the photoradical initiator in the above content range, an appropriate crosslinking structure can be introduced into the adhesive composition, thereby realizing flow control at a high temperature.
- the adhesive composition of the present application may include 40 to 90 parts by weight of an olefin resin having a water vapor transmission rate of 50 g / m 2 ⁇ day or less, 5 to 50 parts by weight of a thermosetting resin, and 1 to 40 parts by weight of a photocurable compound. .
- the adhesive composition may include 50 to 80 parts by weight of an olefinic resin having a water vapor transmission rate of 50 g / m 2 ⁇ day or less, 10 to 40 parts by weight of the thermosetting resin, and 5 to 30 parts by weight of the photocurable compound.
- the present application by adjusting the content range of each component of the adhesive composition as described above, it is possible to provide excellent durability reliability at high temperature and high humidity while at the same time realizing excellent moisture barrier performance.
- the adhesive composition of the present application may include a moisture adsorbent as needed.
- moisture adsorbent may be used as a generic term for components that can adsorb or remove moisture or moisture introduced from the outside through physical or chemical reactions. That is, it means a moisture reactive adsorbent or a physical adsorbent, and mixtures thereof may also be used.
- the moisture reactive adsorbent chemically reacts with moisture, moisture, or oxygen introduced into the resin composition or the cured product to adsorb moisture or moisture.
- the physical adsorbent may inhibit the penetration by lengthening the movement path of moisture or moisture that penetrates into the resin composition or the cured product thereof, and interacts with the matrix composition of the resin composition or the cured product and the moisture reactive adsorbent and the like. Maximize moisture barrier.
- the specific kind of water adsorbent that can be used in the present application is not particularly limited, and, for example, in the case of the water reactive adsorbent, there may be mentioned one kind or a mixture of two or more kinds of metal oxides, metal salts or phosphorus pentoxide (P 2 O 5 ). In the case of a physical adsorbent, zeolite, zirconia or montmorillonite may be mentioned.
- the metal oxides include lithium oxide (Li 2 O), sodium oxide (Na 2 O), barium oxide (BaO), calcium oxide (CaO), magnesium oxide (MgO), and the like.
- Examples include lithium sulfate (Li 2 SO 4 ), sodium sulfate (Na 2 SO 4 ), calcium sulfate (CaSO 4 ), magnesium sulfate (MgSO 4 ), cobalt sulfate (CoSO 4 ), gallium sulfate (Ga 2 (SO 4 ) 3 ), sulfates such as titanium sulfate (Ti (SO 4 ) 2 ) or nickel sulfate (NiSO 4 ), etc., calcium chloride (CaCl 2 ), magnesium chloride (MgCl 2 ), strontium chloride (SrCl 2 ), yttrium chloride (YCl 3 ) , Copper chloride (CuCl 2 ), cesium fluoride (CsF), tantalum flu
- a moisture adsorbent such as the metal oxide may be blended into the composition in a state in which the adsorbent is properly processed.
- a grinding step of the moisture adsorbent may be required, and a process such as a three roll mill, a bead mill or a ball mill may be used for grinding the moisture adsorbent.
- the adhesive composition of the present application may include a moisture adsorbent in an amount of 5 parts by weight to 100 parts by weight, 5 to 90 parts by weight, 5 parts by weight to 80 parts by weight, or 10 to 50 parts by weight with respect to 100 parts by weight of the olefin resin. Can be.
- the adhesive composition of the present application preferably by controlling the content of the moisture adsorbent to 5 parts by weight or more, the adhesive composition or its cured product can be made to exhibit excellent moisture and moisture barrier properties.
- the content of the moisture adsorbent to 100 parts by weight or less when forming the sealing structure of the thin film, it is possible to exhibit excellent moisture barrier properties.
- the adhesive composition of the present application may be in the range of 1.35 to 5.
- V 0.5 is the viscosity of the adhesive composition measured by a Brookfield viscometer at a temperature of 25 °C, a rotation speed of 0.5 rpm and a spindle RV-7
- V 5 is a temperature of 25 °C
- the thixotropic index may be in the range of 1.35 to 5 or 1.39 to 3.3.
- the term thixotropy may refer to a property having fluidity when the composition is in a stationary state but does not have fluidity.
- the present application by controlling the thixotropy index of the adhesive composition as described above, while providing an encapsulation structure having an excellent moisture barrier performance through the olefin resin, at the same time the inflow of air bubbles into the encapsulant in the encapsulation process of the organic electronic device It is possible to prevent problems such as clogging of the nozzle during application of the composition, thereby improving processability and productivity.
- the adhesive composition may have a viscosity measured according to torque at a temperature of 25 ° C., a rotational speed of 0.5 rpm and a Brookfield viscometer at spindle RV-7 in a range of 100,000 cPs to 1,000,000 cPs. have.
- the viscosity in the present application can be measured on the RV-7 spindle using DV-II + Pro as Brookfield viscometer, unless otherwise specified, and the conditions of the temperature of 25 ° C. and the rotational speed of 0.5 rpm In the range from 100,000 cPs to 1,000,000 cPs, 200,000 cPs to 900,000 cPs or 300,000 cPs to 800,000 cPs.
- the present application by controlling the room temperature viscosity of the composition to 100,000 cPs or more, it is possible to prevent the sedimentation of the material, for example, moisture adsorbents or inorganic fillers, etc. present in the composition, by applying the composition in a desired position to encapsulate In forming the structure, it may be possible to implement and maintain the desired shape.
- the adhesive composition may further comprise an inorganic filler.
- a filler may be included to control the thixotropic index of the adhesive composition, apart from the moisture adsorbent described above.
- the adhesive composition should have a thixotropic index controlled in a specific range, and the method of controlling the thixotropic index within the above range is not particularly limited.
- the adhesive composition may include an inorganic filler in an appropriate amount.
- the specific kind of filler that can be used in the present application is not particularly limited, and for example, one kind or a mixture of two or more kinds of clay, talc, alumina, calcium carbonate or silica may be used.
- a product surface-treated with an organic material may be used as the filler, or a coupling agent may be additionally added.
- the adhesive composition of the present application may include an inorganic filler in an amount of 0 to 50 parts by weight, 1 to 40 parts by weight, or 1 to 20 parts by weight based on 100 parts by weight of the olefin resin.
- the present application by controlling the inorganic filler to preferably 1 part by weight or more, it is possible to provide a sealing structure having excellent moisture or moisture barrier properties and mechanical properties.
- the present invention can provide a cured product exhibiting excellent moisture barrier properties even when formed into a thin film by controlling the inorganic filler content to 50 parts by weight or less.
- the BET surface area of the inorganic filler may be in the range of 35 to 500m 2 / g, 40 to 400m 2 / g, 50 to 300m 2 / g or 60 to 200m 2 / g.
- the specific surface area was measured using the BET method, specifically, by adding a sample of 1 g of the inorganic filler to the tube, it can be measured using ASAP2020 (Micromeritics, USA) without pretreatment at -195 ° C. The average value can be obtained by measuring three times on the same sample.
- the present application may provide an encapsulant that can easily implement the encapsulation structure shape desired in the present application by adjusting the specific surface area of the inorganic filler within the above range.
- the adhesive composition according to the present application may include various additives in a range that does not affect the effects of the above-described invention.
- the resin composition may include an antifoaming agent, a coupling agent, a tackifier, an ultraviolet stabilizer, an antioxidant, or the like in an appropriate range of content depending on the desired physical properties.
- the adhesive composition may further comprise an antifoaming agent.
- the present application may include a defoaming agent, thereby implementing the defoaming characteristics in the above-described application process of the adhesive composition, it is possible to provide a reliable sealing structure.
- the kind of antifoamer is not specifically limited as long as the physical property of the adhesive composition required by this application is satisfied.
- the adhesive composition may be liquid at room temperature, for example about 25 ° C.
- the adhesive composition may be a liquid type of a solventless type.
- the photocurable compound may act as a reactive diluent in a liquid composition of a solventless type.
- the adhesive composition may be applied to encapsulating the organic electronic device, and specifically, may be applied to encapsulating the side surface of the organic electronic device.
- the adhesive composition has a liquid form at room temperature, so that the device may be encapsulated in such a manner that the composition is applied to the side of the organic electronic device.
- An exemplary, adhesive composition may have a viscosity of 700 Pa ⁇ s to 5,000 Pa ⁇ s after light irradiation. Within the above viscosity range, the adhesive composition can maintain the shape of the desired encapsulation structure. In one example, the viscosity of the adhesive composition may be measured after irradiating the adhesive composition with light having a wavelength range of the UV-A range of 3 J / cm 2 light amount. In addition, the viscosity of the adhesive composition may be a viscosity measured according to the shear stress at a temperature of 25 °C, 10% strain and frequency conditions of 1Hz. In one example, the viscosity of the composition may be 700 Pa.s to 4,000 Pa.s, 800 Pa.s to 3,000 Pa.s or 900 Pa.s to 2,000 Pa.s.
- UV-A region may mean a wavelength range of 315 nm to 400 nm.
- the light having a wavelength range in the UV-A region herein means light including any wavelength in the wavelength range of 315 nm to 400 nm, or includes two or more wavelengths in the wavelength range of 315 nm to 400 nm. It can mean light.
- the adhesive composition may form the encapsulation structure of the organic electronic device by irradiating the light and then applying heat to perform the main curing.
- the thermal curing may proceed to 40 °C to 100 °C.
- the physical property that the UV curable adhesive composition can be hardened without changing the shape is required. That is, it is necessary to prevent the phenomenon which the adhesive composition spreads at high temperature.
- the adhesive composition may be temporarily cured by irradiating light having a wavelength range in the UV-A region with a light amount of 3 J / cm 2 as described above, and the temporarily cured resin composition may be 80
- the viscosity according to the shear stress at a temperature of °C, 10% strain and a frequency of 1Hz may be 500 Pa ⁇ s to 2,000 Pa ⁇ s.
- the viscosity may be, for example, 500 Pa ⁇ s to 1,800 Pa ⁇ s, 500 Pa ⁇ s to 1,600 Pa ⁇ s or 600 Pa ⁇ s to 1,500 Pa ⁇ s.
- the adhesive composition of the present application can be effectively applied to the side bag of the organic electronic device by satisfying the viscosity range as described above.
- the present application also relates to an organic electronic device.
- Exemplary organic electronic devices include a substrate 21, as shown in FIG. An organic electronic element 23 formed on the substrate 21; And a side encapsulation layer 10 formed on the periphery of the substrate 21 to surround side surfaces of the organic electronic device 23 and including the adhesive composition described above.
- the exemplary organic electronic device may further include a front encapsulation layer 11 covering the entire surface of the organic electronic device 23.
- the front encapsulation layer and the side encapsulation layer may be coplanar.
- “same” may mean substantially the same.
- substantially the same in the same plane means that it may have an error of ⁇ 5 ⁇ m or ⁇ 1 ⁇ m in the thickness direction.
- the front encapsulation layer may encapsulate the upper surface of the device, and may encapsulate the upper surface as well as the side surface together.
- the side encapsulation layer may be formed on the side of the device, but may not directly contact the side of the organic electronic device.
- the front encapsulation layer can be encapsulated in direct contact with the top and side surfaces of the device. That is, the side encapsulation layer may be positioned at the periphery of the substrate in a plan view of the organic electronic device without contacting the device.
- peripheral part means a peripheral edge portion. That is, in the above, the peripheral portion of the substrate may mean a peripheral portion of the substrate.
- the material constituting the side encapsulation layer is not particularly limited, but may include the adhesive composition described above.
- the front encapsulation layer may include an encapsulation resin
- the encapsulation resin may be an acrylic resin, an epoxy resin, a silicone resin, a fluorine resin, a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a poly Vinyl chloride resins, polycarbonate resins, polyphenylene sulfide resins, polyamide resins, or mixtures thereof.
- the components constituting the front encapsulation layer may be the same as or different from the adhesive composition described above.
- the front encapsulation layer since the front encapsulation layer is in direct contact with the device, the front encapsulation layer may not include or contain a small amount of the above-described moisture adsorbent.
- the front encapsulation layer may be included in an amount of 0 to 20 parts by weight based on 100 parts by weight of the encapsulation resin.
- the organic electronic device may include a reflective electrode layer formed on the substrate, an organic layer formed on the reflective electrode layer and including at least a light emitting layer, and a transparent electrode layer formed on the organic layer.
- the organic electronic device 23 may be an organic light emitting diode.
- the organic electronic device according to the present application may be a top emission type, but is not limited thereto, and may be applied to a bottom emission type.
- the organic electronic device may further include a protective film protecting the organic electronic device between the front encapsulation layer or the side encapsulation layer and the organic electronic device.
- the present application relates to a method for manufacturing an organic electronic device.
- the manufacturing method comprises the steps of applying the above-described adhesive composition on the periphery of the substrate 21 on which the organic electronic device 23 is formed to surround the side of the organic electronic device (23); And irradiating light to the adhesive composition and applying heat to the adhesive composition. Applying the adhesive composition may be a step of forming the above-described side encapsulation layer 10.
- the substrate 21 on which the organic electronic device 23 is formed for example, to form a reflective electrode or a transparent electrode on the substrate 21, such as glass or film, by vacuum deposition or sputtering, and the It can be prepared by forming an organic material layer on the reflective electrode.
- the organic material layer may include a hole injection layer, a hole transport layer, a light emitting layer, an electron injection layer and / or an electron transport layer.
- a second electrode is further formed on the organic material layer.
- the second electrode may be a transparent electrode or a reflective electrode.
- the above-described side encapsulation layer 10 is applied to side-cover the organic electronic device 23 on the periphery of the substrate 21.
- a method of forming the side encapsulation layer 10 is not particularly limited, and the above-described adhesive composition may be used on the side of the substrate 21 by screen printing, dispenser coating, or the like.
- the front encapsulation layer 11 may be applied to encapsulate the entire surface of the organic electronic device 23.
- a method known in the art may be applied, and for example, a liquid crystal drop injection process may be used.
- a curing process may be performed on the front or side encapsulation layer encapsulating the organic electronic device.
- the curing process (main curing) may be performed in, for example, a heating chamber or a UV chamber, and is preferably performed. Can proceed in both ways. Conditions in the present curing may be appropriately selected in consideration of the stability of the organic electronic device.
- the composition may be irradiated with light to induce crosslinking.
- Irradiating the light may include irradiating light having a wavelength range in the UV-A region with a light amount of 0.3 to 6 J / cm 2 or a light amount of 0.5 to 5 J / cm 2 .
- the shape of the encapsulation structure which can be the basis, can be realized by temporarily curing through light irradiation.
- the adhesive composition may be in progress hardening.
- the present application is possible to form a structure that can effectively block the moisture or oxygen flowing into the organic electronic device from the outside to ensure the life of the organic electronic device, it is possible to implement the top-emitting organic electronic device, the water blocking It provides an adhesive composition and an organic electronic device comprising the same excellent adhesive durability reliability while implementing the properties.
- FIG. 1 is a cross-sectional view illustrating an organic electronic device according to one example of the present invention.
- alicyclic epoxy resin Mitsubishi Chemical, YX8000, epoxy equivalent: 205 g /
- trimethyrol propane triacrylate (Sartomer, SR351) as a photocurable compound
- Bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure 819, BASF) as a radical initiator was added in an amount of 1 part by weight based on 100 parts by weight of the main component (olefin resin, thermosetting resin, and photocurable compound).
- an imidazole series curing agent (2P4MZ, 2-phenyl-4-methylimidazole, Shikoku) as a thermosetting agent was added in an amount of 5 parts by weight based on 100 parts by weight of the main component
- epoxy silane (glycidyl) Oxypropyl trimethoxysilane, KBM403, Shinetsu) was added to the container in an amount of 1 part by weight based on 100 parts by weight of the main component.
- Fumed silica (Aerosil, Evonik, R805, particle size about 10 ⁇ 20nm) as an inorganic filler was added to the container in an amount of 3 parts by weight based on 100 parts by weight of the main component.
- calcium oxide (CaO, Aldrich, particle size: 1 ⁇ 5 ⁇ m) as a moisture adsorbent was added to the container additionally 20 parts by weight based on 100 parts by weight of the main component.
- the mixing vessel was prepared using a Planetary mixer (Kurabo, KK-250s) to prepare a uniform composition solution.
- An adhesive composition was prepared in the same manner as in Example 1, except that the mixture was added to the mixing vessel at a weight ratio and 25 parts by weight of the moisture adsorbent and 2 parts by weight of the inorganic filler were added to the mixing vessel.
- An adhesive composition was prepared in the same manner as in Example 2, except that the moisture adsorbent was added to the mixing container in a content of 30 parts by weight.
- Acid anhydride-modified polyisobutylene as olefin resin (BASF, Glissopal SA, Mn 1000 g / mol), aromatic epoxy resin (DIC, Epiclon 850, epoxy equivalent: 184 g / eq, viscosity: 11000 cPs) as a thermosetting resin, and
- olefin resin BASF, Glissopal SA, Mn 1000 g / mol
- aromatic epoxy resin DIC, Epiclon 850, epoxy equivalent: 184 g / eq, viscosity: 11000 cPs
- Alicyclic epoxy resin (Mitsubishi Chemical, YX8000, Epoxy equivalent: 205 g / eq, Viscosity: 18500 cPs) and aromatic epoxy resin (DIC, Epiclon 850, Epoxy equivalent: 184 g / eq, Viscosity: 11000 cPs) at room temperature.
- DIC Epiclon 850
- Viscosity: 11000 cPs Into the mixing vessel at a weight ratio of 50 (YX8000: Epiclon850).
- an imidazole series curing agent (2P4MZ, 2-phenyl-4-methylimidazole, Shikoku) was added to the container in an amount of 5 parts by weight based on 100 parts by weight of the main components (alicyclic epoxy resin and aromatic epoxy resin).
- Epoxy silane (glycidyloxypropyl trimethoxysilane, KBM403, Shinetsu) was added to the container in an amount of 1 part by weight based on 100 parts by weight of the main component.
- Fumed silica (Aerosil, Evonik, R805, particle size 10 ⁇ 20nm) as an inorganic filler was added to the container in an amount of 3 parts by weight based on 100 parts by weight of the main component.
- calcium oxide (CaO, Aldrich, particle size: 1 ⁇ 5 ⁇ m) as a moisture adsorbent was added to the container additionally 20 parts by weight based on 100 parts by weight of the main component.
- the mixing vessel was prepared using a Planetary mixer (Kurabo, KK-250s) to prepare a uniform composition solution.
- An adhesive composition was prepared in the same manner as in Comparative Example 1, except that 18500 cPs) was added to the mixed container at a weight ratio of 70:30 (PB2400: YX8000).
- Bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure819, BASF Co., Ltd.) as a radical initiator was added in an amount of 1 part by weight based on 100 parts by weight of the main component (olefin resin, and photocurable compound).
- Epoxy silane (glycidyloxypropyl trimethoxysilane, KBM403, Shinetsu) was added to the container in an amount of 1 part by weight based on 100 parts by weight of the main component.
- Fumed silica (Aerosil, Evonik, R805, particle size 10 ⁇ 20nm) as an inorganic filler was added to the container in an amount of 3 parts by weight based on 100 parts by weight of the main component.
- calcium oxide (CaO, Aldrich, particle size: 1 ⁇ 5 ⁇ m) as a moisture adsorbent was added to the container additionally 20 parts by weight based on 100 parts by weight of the main component.
- the mixing vessel was prepared using a Planetary mixer (Kurabo, KK-250s) to prepare a uniform composition solution.
- the adhesive compositions prepared in Examples and Comparative Examples were injected into a syringe and degassed, then applied to the periphery (circumference) of the glass substrate, and covered with a cover substrate.
- the specimen was then prepared by irradiating the applied adhesive composition with light in the UV-A wavelength region at 5 J / cm 2 and heating at 100 ° C. for 3 hours. Thereafter, while maintaining the specimen in a constant temperature and humidity chamber at 85 ° C. and 85% relative humidity for about 100 hours, it was observed whether there was any lifting, bubbles, or haze at the interface between the glass substrate and the adhesive. When visually observed, any one of floating, bubbles or hazes occurred at the interface between the glass substrate and the pressure-sensitive adhesive, and X was shown in some cases, ⁇ in some cases, and O in the case of no occurrence.
- Calcium tests were conducted to indirectly evaluate the accelerated condition life of OLED devices to which the adhesive compositions of Examples and Comparative Examples were applied. Specifically, 7 spots of calcium (Ca) are deposited on a glass substrate having a size of 100 mm ⁇ 100 mm and have a thickness of 5 mm ⁇ 5 mm and a thickness of 100 nm, and the adhesive compositions of Examples and Comparative Examples are deposited by using a dispenser.
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Abstract
Description
고온고습 접착내구신뢰성 | 소자수명 가속평가 | |
실시예1 | O | O |
실시예2 | O | O |
실시예3 | O | O |
실시예4 | △ | △ |
비교예1 | X | X |
비교예2 | O | X |
비교예3 | X | X |
Claims (19)
- 투습도가 50 g/m2·day 이하인 올레핀계 수지, 열경화성 수지 및 광경화성 화합물을 포함하는 유기전자소자 봉지용 접착제 조성물.
- 제 1 항에 있어서, 올레핀계 수지는 중량평균분자량이 10만 이하인 접착제 조성물.
- 제 1 항에 있어서, 올레핀계 수지는 열경화성 수지와 반응성을 갖는 반응성 관능기를 적어도 하나 이상 가지는 접착제 조성물.
- 제 3 항에 있어서, 열경화성 수지와 반응성을 갖는 관능기는 산무수물기, 카르복실기, 에폭시기, 아미노기, 히드록실기, 이소시아네이트기, 옥사졸린기, 옥세탄기, 시아네이트기, 페놀기, 하이드라지드기 또는 아미드기를 포함하는 접착제 조성물.
- 제 1 항에 있어서, 열경화성 수지는 열경화성 관능기를 하나 이상 포함하는 수지인 접착제 조성물.
- 제 5 항에 있어서, 열경화성 관능기는 에폭시기, 이소시아네이트기, 히드록시기, 카복실기 또는 아미드기를 포함하는 접착제 조성물.
- 제 1 항에 있어서, 열경화성 수지는 올레핀계 수지 100중량부에 대하여 10 내지 70중량부로 포함되는 접착제 조성물.
- 제 1 항에 있어서, 열경화제를 추가로 포함하는 접착제 조성물.
- 제 8 항에 있어서, 열경화제는 잠재성 경화제인 접착제 조성물.
- 제 9 항에 있어서, 열경화제는 열경화성 수지 100중량부에 대하여 1 내지 30 중량부로 포함되는 접착제 조성물.
- 제 1 항에 있어서, 광경화성 화합물은 다관능성의 활성 에너지선 중합성 화합물인 접착제 조성물.
- 제 1 항에 있어서, 광경화성 화합물은 올레핀계 수지 100 중량부에 대하여 10 내지 100 중량부로 포함되는 접착제 조성물.
- 제 1 항에 있어서, 광경화성 화합물 100 중량부에 대하여 0.1 내지 20 중량부의 광라디칼 개시제를 추가로 포함하는 접착제 조성물.
- 제 1 항에 있어서, 수분 흡착제를 추가로 포함하는 접착제 조성물.
- 제 14 항에 있어서, 수분 흡착제는 올레핀계 수지 100 중량부에 대하여 5 내지 100중량부로 포함되는 접착제 조성물.
- 제 1 항에 있어서, 올레핀계 수지, 열경화성 수지 및 광경화성 화합물은 각각 40 내지 90 중량부, 5 내지 50 중량부 및 1 내지 40 중량부로 포함되는 접착제 조성물.
- 기판; 기판 상에 형성된 유기전자소자; 및 상기 기판의 주연부 상에 상기 유기전자소자의 측면을 둘러싸도록 형성되고, 제 1 항에 따른 접착제 조성물을 포함하는 측면 봉지층을 포함하는 유기전자장치.
- 제 17 항에 있어서, 유기전자소자의 전면을 커버하는 전면 봉지층을 추가로 포함하고, 상기 전면 봉지층 및 측면 봉지층은 동일 평면상에 존재하는 유기전자장치.
- 상부에 유기전자소자가 형성된 기판의 주연부 상에 제 1 항의 접착제 조성물을 상기 유기전자소자의 측면을 둘러싸도록 도포하는 단계; 상기 접착제 조성물에 광을 조사하는 단계; 및 상기 접착제 조성물에 열을 가하는 단계를 포함하는 유기전자장치의 제조 방법.
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CN201680027384.3A CN107592877B (zh) | 2015-03-24 | 2016-03-24 | 粘合剂组合物 |
US15/560,917 US10336919B2 (en) | 2015-03-24 | 2016-03-24 | Adhesive composition |
EP16769112.0A EP3275941B1 (en) | 2015-03-24 | 2016-03-24 | Adhesive composition |
JP2017549728A JP6716146B2 (ja) | 2015-03-24 | 2016-03-24 | 接着剤組成物 |
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EP (1) | EP3275941B1 (ko) |
JP (2) | JP6716146B2 (ko) |
KR (1) | KR101740184B1 (ko) |
CN (1) | CN107592877B (ko) |
TW (1) | TWI589688B (ko) |
WO (1) | WO2016153294A1 (ko) |
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EP3549994A4 (en) * | 2016-11-30 | 2020-08-05 | Nitto Denko Corporation | ADHESIVE COMPOSITION, ADHESIVE LAYER, AND ADHESIVE SHEET |
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US10351736B2 (en) * | 2015-03-24 | 2019-07-16 | Lg Chem, Ltd. | Adhesive composition |
JP6557352B2 (ja) * | 2015-03-24 | 2019-08-07 | エルジー・ケム・リミテッド | 接着剤組成物 |
CN111094429B (zh) | 2017-09-12 | 2022-12-27 | 株式会社Lg化学 | 封装组合物 |
KR102159493B1 (ko) * | 2017-11-28 | 2020-09-25 | 주식회사 엘지화학 | 접착제 조성물 |
EP3725860B1 (en) * | 2017-12-18 | 2024-07-03 | Lg Chem, Ltd. | Composition for encapsulation |
CN112088579A (zh) * | 2018-05-18 | 2020-12-15 | 日本瑞翁株式会社 | 印刷用树脂溶液和器件结构体的制造方法 |
US20220213358A1 (en) * | 2019-05-22 | 2022-07-07 | 3M Innovative Properties Company | Polyisobutylene Adhesive Comprising Multifunctional Component with (Meth)Acryl or Vinyl Ether Groups |
CN113840889B (zh) * | 2019-06-05 | 2024-08-06 | 株式会社Lg化学 | 用于封装的组合物 |
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EP3549994A4 (en) * | 2016-11-30 | 2020-08-05 | Nitto Denko Corporation | ADHESIVE COMPOSITION, ADHESIVE LAYER, AND ADHESIVE SHEET |
US11560499B2 (en) | 2016-11-30 | 2023-01-24 | Nitto Denko Corporation | Adhesive composition, adhesive layer and adhesive sheet |
Also Published As
Publication number | Publication date |
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US20180051193A1 (en) | 2018-02-22 |
US10336919B2 (en) | 2019-07-02 |
CN107592877B (zh) | 2021-04-13 |
KR101740184B1 (ko) | 2017-05-25 |
JP2020111755A (ja) | 2020-07-27 |
EP3275941B1 (en) | 2021-10-13 |
JP6716146B2 (ja) | 2020-07-01 |
EP3275941A1 (en) | 2018-01-31 |
TW201704435A (zh) | 2017-02-01 |
JP2018513888A (ja) | 2018-05-31 |
KR20160114540A (ko) | 2016-10-05 |
TWI589688B (zh) | 2017-07-01 |
EP3275941A4 (en) | 2018-06-13 |
CN107592877A (zh) | 2018-01-16 |
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