WO2020175958A1 - 봉지 필름 - Google Patents

봉지 필름 Download PDF

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Publication number
WO2020175958A1
WO2020175958A1 PCT/KR2020/002899 KR2020002899W WO2020175958A1 WO 2020175958 A1 WO2020175958 A1 WO 2020175958A1 KR 2020002899 W KR2020002899 W KR 2020002899W WO 2020175958 A1 WO2020175958 A1 WO 2020175958A1
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WO
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Prior art keywords
weight
parts
encapsulation
film
film according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2020/002899
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English (en)
French (fr)
Inventor
한은구
김소영
이승민
양세우
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
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Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to JP2021550031A priority Critical patent/JP7317133B2/ja
Priority to US17/434,665 priority patent/US12391849B2/en
Priority to CN202080016073.3A priority patent/CN113474435B/zh
Publication of WO2020175958A1 publication Critical patent/WO2020175958A1/ko
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/10—Adhesives in the form of films or foils without carriers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F287/00—Macromolecular compounds obtained by polymerising monomers on to block polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
    • C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
    • C08F290/06—Polymers provided for in subclass C08G
    • C08F290/067—Polyurethanes; Polyureas
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
    • C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D153/00—Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
    • C09D153/02—Vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • 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
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/841—Self-supporting sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10—Organic polymers or oligomers
    • H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/10—Organic polymers or oligomers
    • H10K85/151—Copolymers
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer
    • 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
    • C09J2453/00—Presence of block copolymer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants

Definitions

  • organic electronic devices examples include photovoltaic devices, rectifiers, transmitters, and organic light emitting diodes (OLEDs).
  • OLEDs organic light emitting diodes
  • organic light-emitting diodes consume less power than conventional light sources, have a faster response speed, and are advantageous for thinner display devices or lighting.
  • OLED also has excellent space utilization, and is expected to be applied in various fields ranging from portable devices, monitors, laptops and TVs.
  • It provides an encapsulation film that has a rollable characteristic, does not undergo plastic deformation, and has excellent resilience, and an organic electronic device including the same.
  • the encapsulation film can be applied to an organic electronic device, and in one example, it is flexible (13 ⁇ 4 3 ⁇ 41 ⁇ , and a rollable (1 ⁇ 11 1 ⁇ ) organic electronic device with characteristics.
  • the encapsulation film can protect the device from moisture or oxygen by sealing the organic electronic device of the organic electronic device in a cured or uncured form of an adhesive film or an adhesive film.
  • the encapsulation film according to the above can effectively suppress cracks that may occur in the organic electronic device regardless of multiple folding or rolling processes, and it provides excellent resilience even after rolling while easing the stress generated by folding. Eggplants can have physical properties.
  • organic electronic device refers to an article or device having an element including a layer of organic material that generates an exchange of charges using holes and electrons between a pair of opposing electrodes, Examples include, but are not limited to, photovoltaic devices, rectifiers, transmitters, and organic light-emitting diodes (01 1). In one example of the present invention, the organic electronic device may be 01 High 1). .
  • the term adhesive is a term that encompasses not only a substance commonly referred to as an adhesive, but also a layer formed using a material called an adhesive or a material referred to as an adhesive.
  • the encapsulation film according to this application includes block copolymers and multifunctional oligomers.
  • the block copolymer may have a first block derived from a monomer having a glass transition temperature of 0 0 0 or higher.
  • the encapsulating film is 200% in the length direction under the condition of 25°0 temperature and 60% relative humidity. 2 times) After stretching and leaving for 24 hours, when the stretched force is removed and the length is measured after 1 hour, the degree of restoration may be within 0% of the existing length.
  • the length direction refers to the length direction in a polygonal encapsulating film. It can mean the direction of any one side, and in a specific example, it can mean the direction of the long side.
  • the degree of restoration is, for example, 109% or less, 108% or less, 107% or less, 106% or less, 105% or less, 104 % Or less, or 103% or less, and the lower limit is not particularly limited, and may be 98% or more, 100% or more, 101% or more, or 102% or more.
  • This application is flexible by controlling the degree of restoration of the encapsulation film. It is applied to an electronic device and can have a physical property that has excellent resilience even after rolling while easing the stress generated by folding.
  • the encapsulation film may include an encapsulation layer as described later, and the encapsulation composition constituting the encapsulation layer may have the following composition.
  • the encapsulation film is the block copolymer and the multifunctional oligomer. 30 to 90 respectively 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899
  • a monomer having a glass transition temperature of 0 or higher constituting the first block in the block copolymer, when a homopolymer is formed with the monomer, may be the glass transition temperature of the polymer. It may be a monomer with a transition temperature of 0 or more than 0.
  • the block copolymer may additionally include a second block, and the second block may have a lower glass transition temperature than the first block.
  • the second block may have a lower glass transition temperature than the first block.
  • the block may be derived from a monomer with a glass transition temperature of less than 0°0, -10°0 or less, -30°0 or less or -50°0.
  • the lower limit of the glass transition temperature of the monomer is not particularly limited and is -300.
  • the monomer constituting the first block may have a glass transition temperature of 0°0 or more, 50°0 or more, 70°0 or more, or 90°0 or more. Glass transition of the first block monomer
  • the upper temperature limit can be 300°(:. This application can realize excellent resilience in folding or rolling at the same time with moisture barrier properties by controlling the glass transition temperature of each block of the block copolymer.
  • block derived from a monomer can mean that a polymerized unit in a block of a copolymer is formed from a polymerization reaction of the monomer.
  • the monomer constituting the block copolymer may include, for example, an olefinic monomer. That is, at least one of the first block and the second block may contain an olefinic monomer.
  • the olefinic monomer may include, for example, ethylene, propylene, 1-butene, 2-butene, isobutylene, isoprene, styrene, or butadiene.
  • the olefinic compound may be a diene compound. .
  • the monomer constituting the first block or the second block may be, for example, a monomer having 2 to 12 carbon atoms, 3 to 10 or 3 to 8 carbon atoms.
  • the monomer constituting the first block or the second block may have 1 or 2 to 3 unsaturated hydrocarbon bonds.
  • the monomer constituting the second block may have an annular structure in the molecular structure. 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899
  • the monomer constituting the second block is contained in the molecular structure even after polymerization
  • the block copolymer according to this application may contain at least one unsaturated group in the molecular structure. That is, the monomer may contain one or more unsaturated groups in addition to the polymerization unit. However, the encapsulation described above. After curing the film, some or all of the unsaturated groups may be crosslinked with a polyfunctional oligomer or a reactive monomer.
  • the block copolymer is molded into a film
  • the polymer can have a possible weight average molecular weight (MW.Weight Average Molecular Weight), for example, the polymer is 10,000 g/mol to 2,000,000 g/mol, 20,000 to 1,500,000 g/mol, 30,000 to 1,000,000 g/mol, 40,000 To 80,000 g/mol, 50,000 to 500,000 g/mol, 80,000 to 300,000 g/mol, or 90,000 to 200,000 g/mol.
  • the term weight average molecular weight in this application is GPC (Gel permeation Chromatograph). It refers to the conversion value for listyrene by the standard set immediately.
  • the encapsulation film of this application may contain a multifunctional oligomer.
  • the multifunctional oligomer may be a curable oligomer, and the oligomer may be a thermosetting or photocurable oligomer.
  • the multifunctional oligomer may be a compound containing two or more active energy ray polymerizable functional groups.
  • the number of functional groups is not particularly limited, but may be in the range of 2 to 8.
  • the polyfunctional oligomer may have a weight average molecular weight in the range of 500 g/mol to 50,000 g/mol, unlike the monomers described below.
  • the lower limit of the weight average molecular weight of the polyfunctional oligomer is 800 g/mol, 1000 g/mol, 1200 g/mol, 1500g/mol, 2000g/mol, or 3000g/mol.
  • the upper limit of the weight average molecular weight of the multifunctional oligomer is 40,000g/mol, 35,000g/mol, 25,000g/mol, 15,000g/mol, 10,000g/ mol or 9,000 g/mol.
  • the polyfunctional oligomer may be an acrylic compound or a vinyl compound, but is not limited thereto.
  • This Joule source contains the above-described block copolymer and a specific content of the polyfunctional oligomer, thereby providing excellent restoration. Realizes durability and reliability in characteristics and harsh conditions.
  • the encapsulation film may further include a reactive monomer.
  • the reactive monomer may be a photocurable or thermosetting monomer.
  • the reactive monomer has a weight average molecular weight of less than 500 g/mol and 400 g. It may be less than /mol, in the range of 50 to 390 g/mol or 100 to 350 g/mol.
  • the reactive monomer may contain one or two or more functional groups.
  • the upper limit is not particularly limited and may contain up to 8 reactive functional groups.
  • the reactive monomer may include one or more active energy ray polymerizable functional groups. That is, the reactive monomer may be a monofunctional compound or a polyfunctional compound. In addition, the reactive monomer may be an acrylic compound or a vinyl compound. It can be a compound.
  • the encapsulation film contains a reactive monomer
  • the block copolymer, the multifunctional oligomer and the reactive monomer are 30 to 90 parts by weight, 5 to 48 parts by weight, and 1 to 40 parts by weight, respectively. ; 35 to 85 parts by weight, 10 to 45 parts by weight, and 2 to 38 parts by weight; 42 to 80 parts by weight, 15 to 40 parts by weight and 3 to 33 parts by weight; or 47 to 70 parts by weight, 20 to 38 parts by weight, and 4 to 28 parts by weight.
  • the multifunctional oligomer when the encapsulation film is based on 100 parts by weight of the block copolymer, the multifunctional oligomer is 20 to 95 parts by weight, 30 to 93 parts by weight, 35 based on 100 parts by weight of the block copolymer. It may be included in the range of 90 to 90 parts by weight, 40 to 85 parts by weight, 43 to 83 parts by weight, 48 to 70 parts by weight, 49 to 60 parts by weight, 53 to 60 parts by weight, or 49 to 55 parts by weight.
  • the monomer is 3 to 70 parts by weight, 4 to 65 parts by weight, 5 to 60 parts by weight, 6 to 58 parts by weight, 7 to 53 parts by weight, 10 to 52 parts by weight, 13 to 48 parts by weight based on 100 parts by weight of the block copolymer. It may be included in the range of parts by weight, 15 to 32 parts by weight, 20 to 55 parts by weight, or 5 to 16 parts by weight.
  • the block copolymer is a bag constituting the encapsulation film.
  • This application has moisture barrier properties by adjusting the content ratio of each of the above compositions, and achieves a degree of crosslinking within a suitable range, thereby having the desired elasticity, thereby modifying In addition to resilience, it can achieve durability in harsh conditions.
  • the encapsulation film may additionally contain an tackifier, and the tackifier may be a hydrogenated cyclic olefin-based polymer.
  • the tackifier for example, petroleum resin Hydrogenated petroleum resins obtained by hydrogenating can be used. Hydrogenated petroleum resins can be partially or completely hydrogenated, and can be a mixture of such resins. These tackifiers are compatible with the encapsulation composition while still having moisture barrier properties. These excellent, low organic volatiles can be selected.
  • Specific examples of hydrogenated petroleum resins include hydrogenated terpene resins, hydrogenated ester resins or hydrogenated petroleum resins.
  • the weight average molecular weight may be about 200 to 5,00 / 1110 1.
  • the content of the tackifier can be appropriately adjusted as necessary.
  • the content of the tackifier is 5 weight relative to 0 parts by weight of the solid content of the bag composition. It may be included in a ratio of parts by weight to 0 parts by weight or 20 to 40 parts by weight.
  • the encapsulation composition is the above block copolymer, polyfunctional oligomer 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899
  • a curing agent or initiator may be additionally included.
  • a curing agent or a curing reaction capable of forming a crosslinked structure by reacting with the above-described block copolymer, polyfunctional oligomer or reactive monomer.
  • Initiating cation initiators or radical initiators may additionally be included.
  • the cationic initiator a cationic photopolymerization initiator or a cationic thermal initiator may be used.
  • the cation photopolymerization initiator is an onium salt or
  • An organometallic salt-based ionizing cation initiator or an organic silane or latent sulfonic acid-based or non-ionized cation photopolymerization initiator may be used.
  • an organometallic salt-based ionizing cation initiator or an organic silane or latent sulfonic acid-based or non-ionized cation photopolymerization initiator may be used.
  • an onium salt-based initiator a diaryliodonium salt (diaryliodonium salt) diaryliodonium salt), triarylsulfonium salt or
  • An aryldiazonium salt may be exemplified, an initiator of an organometallic salt series may be exemplified such as iron arene, and an initiator of an organosilane series may be exemplified by 0-nitrilebenzyltriarylsilyl ether ( o-ni ⁇ Beingzyl triaryl silyl ether), triaryl silyl peroxide or acyl silane can be exemplified, and the potential sulfuric acid-based initiator is a-sulfonyloxy ketone or a -Hydroxymethylbenzoin sulfonate may be exemplified, but is not limited thereto.
  • the initiator may be included in an amount of 0.01 parts by weight to 20 parts by weight, 0.04 parts by weight to W parts by weight, or 0.1 parts by weight to 5 parts by weight, based on 100 parts by weight of the solid content of the bag composition.
  • the encapsulation film of this application may contain a moisture absorbent, if necessary.
  • ⁇ Moisture adsorbent'' can be used as a generic term for a component capable of adsorbing or removing moisture or moisture introduced from the outside through a physical or chemical reaction, that is, a chemically reactive adsorbent or a physical adsorbent, and a mixture thereof is also used. Can be used.
  • the chemically reactive adsorbent chemically reacts with moisture, moisture, or oxygen introduced into the adhesive to adsorb moisture or moisture.
  • the physical adsorbent lengthens the path of moisture or moisture penetrating into the encapsulation structure. Penetration can be inhibited, and barrier properties to moisture and moisture can be maximized through interaction with the matrix structure of the adhesive resin and moisture-reactive adsorbents.
  • moisture adsorbents that can be used in this application are not particularly limited.
  • metal powders such as alumina, metal oxides, metal salts or phosphorus pentoxide (P 2 0 5 )
  • P 2 0 5 phosphorus pentoxide
  • zeolite, titania, zirconia or montmorillonite may be mentioned.
  • metal oxides in the above include alumina, lithium oxide (Li 2 O),
  • metal salts include lithium sulfate), sodium sulfate 3 ⁇ 480 4 ), calcium sulfate (0&30 4 ), magnesium sulfate (MgS0 4 ), cobalt sulfate (0 4 ), gallium sulfate 3 ⁇ 4 0 4 ) 3), titanium sulfate (off 0 4 ) 2 ) or nickel sulfate 0 4 )
  • Metal halides such as calcium bromide (0&3 ⁇ 4 2 ), cesium bromide, eight selenium bromide, eight vanadium bromide 0/3 ⁇ 4 3 ), magnesium bromide (MgBr 2 ), barium iodide fluoric acid 2 ) or magnesium iodide (MgI 2 ), etc.; or barium perchlorate W ( :10 4 ) 2 ) or
  • Metal chlorate such as magnesium perchlorate ((( : 104)2) , etc., but is not limited thereto.
  • an adhesive prepared in the form of a film with the above-described bag composition may have a thickness of 100 ⁇ or less, 80 01 or less, 50 01 or less or 30 01 depending on the type of organic electronic device to be applied. It can be formed into the following thin film, and in this case, a pulverizing process of a moisture adsorbent may be required.
  • a process such as a 3-roll mill, a bead mill, or a ball mill may be used.
  • the sealing film of this application contains a moisture absorbent, 100 parts by weight of the block copolymer
  • the moisture adsorbent may not be included as an optional component, preferably, by controlling the content of the moisture adsorbent to 5 parts by weight or more, the cured product can exhibit excellent moisture and moisture barrier properties. In addition, by controlling the content of the moisture adsorbent to 200 parts by weight or less, it is possible to form an encapsulation structure of a thin film while exhibiting excellent moisture barrier properties.
  • the encapsulation film of this application may contain a filler, preferably an inorganic filler, if necessary.
  • the filler lengthens the passage of moisture or moisture penetrating into the encapsulation structure, thereby inhibiting its penetration, and resin components. Moisture and moisture barrier properties can be maximized by interacting with the matrix structure and moisture adsorbents, etc.
  • the specific types of fillers that can be used in this application are not particularly limited, for example, silica, clay, or talc. One or more mixtures can be used.
  • a product surface-treated with an organic material may be used as the filler, or a coupling agent may be added to the filler.
  • the encapsulation film of the present application may include 0 to 50 parts by weight, 1 to 40 parts by weight, or 1 to 20 parts by weight of a filler based on 100 parts by weight of the block copolymer.
  • the filler may not be included in the adhesive as an optional ingredient.
  • the encapsulation film can be uniformly distributed with moisture adsorbents, etc.
  • a dispersant that can be used here, for example, a nonionic surfactant that has an affinity with the surface of a moisture adsorbent and has good compatibility with an adhesive resin can be used.
  • the encapsulation film may further include a silane coupling agent.
  • the silane coupling agent for example, 3-methacryloxypropyltrimethoxysilane,
  • the silane coupling agent can play a role of increasing the interfacial adhesion when the encapsulation composition is made into a film and applied.
  • the silane coupling agent for example, 0.1 to 10 parts by weight, 0.5 to 8 parts by weight, 0.8 to 5 parts by weight, 1 to 5 parts by weight, 1 part by weight based on ⁇ 0 parts by weight of the block copolymer Parts by weight to 4.5 parts by weight, or 1 to 2 parts by weight may be included.
  • the bag composition may contain a coupling agent, a crosslinking agent, a curable material, an ultraviolet stabilizer or an antioxidant It can be included in an appropriate range depending on the properties for which it is intended.
  • the encapsulation film according to this application may include an encapsulation layer including the encapsulation composition described above.
  • the encapsulation film may have a single-layer structure or a multi-layer structure of two or more layers.
  • the encapsulation film is two or more layers. It may include a multi-layered encapsulation layer of more than one layer, the two or more encapsulation layer compositions may be the same or different, and at least one or more of the multi-layered structures may include the aforementioned encapsulation composition.
  • the structure of the encapsulation film in this application is not particularly limited, but as an example, a base film or a release film (hereinafter sometimes referred to as "first film"); And on the base film or release film. It may have a structure including the encapsulation layer to be formed.
  • the encapsulation film of this application may further include a base film or a release film (hereinafter sometimes referred to as "second film") formed on the encapsulation layer.
  • second film a release film
  • the specific types of the first film that can be used in this application are 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899 is not limited.
  • a general polymer film in this field can be used as the first film above.
  • a base material or release film polyethylene terephthalate film,
  • Polytetrafluoroethylene film polyethylene film, polypropylene film, polybutene film, polybutadiene film, vinyl chloride copolymer film, polyurethane film, ethylene-vinyl acetate film, ethylene-propylene copolymer film,
  • Ethylene-ethyl acrylate copolymer film, ethylene-methyl acrylate copolymer film, or polyimide film may be used.
  • appropriate release treatment may be performed on one or both sides of the base film or release film of this application.
  • the releasing agent used for the release treatment of the base film include alkyd, silicon, fluorine, unsaturated esters, saliolefins or waxes, and in terms of heat resistance, alkyd, silicon, or fluorine-based releasing agents are used. It is desirable, but not limited to this.
  • the type of the second film (hereinafter sometimes referred to as "cover film") that can be used in this application is not particularly limited.
  • the second film within the categories exemplified in the above-described first film, the same or different types as the first film may be used.
  • the second film may also be used with an appropriate release treatment performed.
  • the thickness of the base film or release film (first film) as described above is not particularly limited, and may be appropriately selected according to the application applied.
  • the thickness of the first film in this application May be 10 to 500, preferably about 20 to 200 ⁇ . If the thickness is less than 10 ⁇ , there is a risk that deformation of the base film may easily occur in the manufacturing process, and if it exceeds 500, the economy is deteriorated.
  • the thickness of the second film in this application is not particularly limited.
  • the thickness of the second film may be set to be the same as that of the first film.
  • the thickness of the second film may be set relatively thinner than the first film in consideration of fairness, etc. have.
  • the thickness of the encapsulation layer included in the encapsulation film of this application is not particularly limited, and may be appropriately selected according to the following conditions in consideration of the purpose to which the film is applied.
  • the thickness of the sealing layer included in the sealing film of this application is 5 to 200 /L,
  • it may be about 10 ⁇ to 150 01.
  • the encapsulation film of this application is the base film, and may include a metal layer.
  • the base film may not be peeled off unlike the release film.
  • the metal layer is, for example, 3 ⁇ 111 to 500//111, 10 ⁇ 111 to 450 ⁇ 01, 20 ⁇ 01 to 400//111, 30 ⁇ 01 to 350 ⁇ 01 or 40 ;
  • the metal layer may have a thickness range of from 200 //111 .
  • the metal layer may have a metal layer disposed on the metal foil 1 & 11) of the thin film or on the polymer base layer.
  • the above-described encapsulation layer is attached to the metal layer. It is located on the opposite side of the surface and can act as a protective layer.
  • the metal layer is a metal, oxide, metal nitride, metal carbide, 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899
  • the metal layer may contain an alloy in which one or more metal elements or non-metal elements are added to one metal, for example, Invar.
  • the metal layer may include iron, chromium, copper, aluminum nickel, iron oxide, chromium oxide, silicon oxide, aluminum oxide, titanium oxide, phosphorus oxide, and oxidation. Tin, indium tin oxide, tantalum oxide, zirconium oxide, niobium oxide, and combinations thereof.
  • the organic electronic device may be a flexible organic electronic device or a rollable organic electronic device.
  • the organic electronic device may include the above-described encapsulation film. As shown in FIG. 1, the organic electronic device includes a substrate (1), an organic electronic device (2) formed on the substrate, and the
  • FIG. 1 is an exemplary structure in which the encapsulation film includes an encapsulation layer 3 and a metal layer 4.
  • the organic electronic device present on the upper portion of the substrate region includes a first electrode layer and a second electrode layer, and may also include an organic layer present between the first and second electrode layers.
  • the first and second electrode layers may be hole-injectable or electron-injectable electrode layers commonly used in organic electronic devices.
  • One of the first and second electrode layers is formed of a hole-injectable electrode layer, and the other is an electron-injectable electrode layer.
  • One of the first and second electrode layers may be formed as a transparent electrode layer, and the other may be formed as a reflective electrode layer.
  • An organic layer is present between the first and second electrode layers.
  • the organic layer is at least
  • It may include two light-emitting units.
  • light generated from the light-emitting unit can be emitted toward the transparent electrode layer through a process that is reflected by the reflective electrode layer.
  • the specific structure of this organic layer is not particularly limited.
  • various materials and methods for forming the hole or electron injection electrode layer and organic layer for example, a light-emitting unit, an electron injection or transport layer, and a hole injection or transport layer. This is known, and all of the above methods can be applied to the manufacture of the organic electronic device.
  • the organic electronic device of this application may include a protective layer.
  • the protective layer may include a protective layer.
  • the electrode may be composed of a conventional material in the present technical field, and for example, an inorganic layer and an organic layer may be alternately stacked as an inorganic material or deposited with a new 20 3 or the like.
  • This application also relates to a method of manufacturing the above organic electronic device.
  • the manufacturing method may include applying the above-described encapsulation film on a substrate having an organic electronic device formed thereon to cover the organic electronic device.
  • the encapsulation film may be cured before or after covering the organic electronic device.
  • curing may mean that the encapsulation composition of the present invention forms a crosslinked structure through heating or irradiation processes and is manufactured in the form of adhesive or adhesive.
  • the manufacturing method of this application is to form an electrode by vacuum deposition or sputtering on a polymer film used as a substrate, and on the electrode, for example, a luminescent property consisting of a hole transport layer, a light emitting layer, and an electron transport layer.
  • an electrode layer may be additionally formed on the top of the organic electronic device to form an organic electronic device.
  • the above-described encapsulation film is placed on the surface of the substrate subjected to the above process to completely encapsulate the device. Subsequently, the encapsulation film can be heated using a laminating machine or the like to provide fluidity and compression.
  • the organic electronic device can also be manufactured in other ways, for example, the manufacturing of the device is proceeded in the same way as above, but the order of the process or the conditions can be changed.
  • It provides an encapsulation film that has a rollable characteristic, does not undergo plastic deformation, and has excellent resilience, and an organic electronic device including the same.
  • 1 is a cross-sectional view showing an exemplary organic electronic device.
  • Shin-Etsu was added in an amount of 0.5 parts by weight, and then diluted with toluene so that the solid content was about 40% by weight, to prepare a bag composition coating solution.
  • the prepared solution was coated on the release side of the release PET and dried in a 110 O C oven for 3 minutes to form a 50/ffli-thick sealing layer to prepare a sealing film.
  • Styrene-butadiene-styrene copolymer (SBS, Mw: 100,000 g/mol, LG Chem) as a block copolymer, urethane acrylate oligomer as a polyfunctional oligomer (CN9021NS, Mw: 5000 g/mol, Satomer) and Except that trimethyrol propane triacrylate (TMPTA, Aldrich) was added to the reaction vessel at a weight ratio of 50:25:25 (SBS: CN9021NS: TMPTA), respectively, in the same manner as in Example 1, the bag composition and An encapsulation film was prepared.
  • SBS Styrene-butadiene-styrene copolymer
  • urethane acrylate oligomer as a polyfunctional oligomer
  • TMPTA trimethyrol propane triacrylate
  • SBS Styrene-butadiene-styrene copolymer
  • urethane acrylate oligomer as a polyfunctional oligomer
  • LA lauryl acrylate
  • SBS:CN9021NS:LA lauryl acrylate
  • an encapsulation composition and encapsulation film were prepared in the same manner as in Example 1.
  • An encapsulation composition and encapsulation film were prepared in the same manner as in Example 1, except that isobutylene-isoprene rubber (IIR, Exxon) was used.
  • IIR isobutylene-isoprene rubber
  • SBS Styrene-butadiene-styrene copolymer
  • urethane acrylate oligomer as a polyfunctional oligomer
  • Trimethylolpropane as a reactive monomer
  • Triacrylate (TMPTA, Aldrich) 20:60:20 (SBS: 2020/175958 1»(:1 ⁇ 1 ⁇ 2020/002899
  • CN9021NS TMPTA
  • ultraviolet rays of lJ/cm 2 or more were irradiated.
  • the sample prepared in Experimental Example 2 was allowed to stand for 1000 hours at 85 O C and 85% relative humidity to observe the change.
  • the film was deposited to a thickness of W0 nm, and the sealing films of Examples and Comparative Examples were applied to cover all of the calcium. After bonding with a cover glass having a size of 100 mm x 100 mm on the film, it was cured under the curing conditions described above. The specimens were observed in a constant temperature and humidity chamber at 85 O C and 85% relative humidity to observe that the calcium became transparent due to the oxidation reaction caused by moisture permeation. The time it took for the moisture to penetrate 3 mm (to become transparent) was measured. 2020/175958 1»(:1/10 ⁇ 020/002899

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Abstract

본 출원은 봉지 필름 및 이를 포함하는 유기전자장치에 관한 것으로서, 우수한 수분 차단 특성을 구현할 뿐만 아니라, 플랙서블하고 롤러블한 특성을 가지면서 소성 변형이 일어나지 않고 우수한 복원력을 가지는 봉지 필름 및 이를 포함하는 유기전자장치를 제공한다.

Description

2020/175958 1»（：1^1{2020/002899 명세서
발명의명칭:봉지필름
기술분야
[1] 과字!츰워들과의상호이용
[2] 본출원은 2019년 2월 28일자한국특허출원제 10-2019-0024260호에기초한 우선권의이익을주장하며,해당한국특허출원의문헌에개시된 모든내용은 본명세서의일부로서포함된다.
[3] 기숨분야
[4] 본출원은봉지필름,이를포함하는유기전자장치,및이를포함하는
유기전자장치에관한것이다.
배경기술
[5] 유기전자장치 (OED; organic electronic device)는정공및전자를이용하여
전하의교류를발생하는유기재료층을포함하는장치를의미한다.
유기전자장치의 예로는,광전지장치 (photovoltaic device),정류기 (rectifier), 트랜스미터 (transmitter)및유기발광다이오드 (OLED; organic light emitting diode) 등을들수있다·
[6] 하나의구체예에서 ,유기발광다이오드 (OLED: Organic Light Emitting Didoe)는 기존광원에비하여,전력소모량이적고,응답속도가빠르며,표시장치또는 조명의박형화에유리하다. OLED는또한,공간활용성이우수하여,각종휴대용 기기,모니터,노트북및 TV에걸친다양한분야에서적용될것으로기대되고 있다.
[7] 최근디스플레이분야에서는제품의플렉서블화및롤러블화가중요시되고 있다.또한, OLED의상용화및용도확대에있어서,가장주요한문제점은 내구성문제이다. OLED에포함된유기재료및금속전극등은수분등의외부적 요인에의해매우쉽게산화된다.이에따라,최근연구는플렉서블또는롤러블 디스플레이에일정변형을가해주더라도소성변형이일어나지않고우수한 복원력을가지며 ,동시에우수한수분차단성능을가지는디스플레이에대해 논의중이다.
발명의상세한설명
기술적과제
[8] 본출원은우수한수분차단특성을구현할뿐만아니라,플랙서블하고
롤러블한특성을가지면서소성변형이일어나지않고우수한복원력을가지는 봉지필름및이를포함하는유기전자장치를제공한다.
과제해결수단
[9] 이하에서첨부하는도면을참조하여본발명의구현예들을보다구체적으로 설명하기로한다.또한,본발명을설명함에있어서,관련된공지의범용적인 2020/175958 1»（：1^1{2020/002899
2 기능또는구성에대한상세한설명은생략한다.또한,첨부되는도면은본 발명의이해를돕기위한개략적인것으로본발명을보다명확하게설명하기 위해서설명과관계없는부분은생략하였다.도면에서여러층및영역을 명확하게표현하기위하여두께또는크기를확대하여나타내었다.도면에 표시된두께，크기 ,비율등에의해본발명의범위가제한되지아니한다.
[1이 본출원은봉지필름에관한것이다.상기봉지필름은유기전자장치에적용될 수있고,일예시에서플렉서블（1¾ ¾1句하고,롤러블（1切11 1句한특성을가지는 유기전자장치에적용될수있다.예를들어,상기봉지필름은접착필름또는 점착필름의경화또는미경화형태로상기유기전자장치의유기전자소자를 전면으로밀봉하여수분또는산소로부터상기소자를보호할수있다.본 출원에따른봉지필름은,상기유기전자장치에적용된후,여러번의폴딩또는 롤링공정에도불구하고유기전자장치에발생할수있는크랙을효과적으로 억제할수있고,폴딩함에따라발생하는응력을완화하면서롤링후에도우수한 복원력을가지는물성을가질수있다.
[11] 본명세서에서,용어 「유기전자장치」 는서로대향하는한쌍의전극사이에 정공및전자를이용하여전하의교류를발생하는유기재료층을포함하는 소자를갖는물품또는장치를의미하며,그예로는,광전지장치 ,정류기 , 트랜스미터및유기발광다이오드（01止1））등을들수있으나,이에제한되는것은 아니다.본발명의하나의 예시에서상기유기전자장치는 01고1）일수있다.
[12] 본명세서에서용어접착제는,통상적으로접착제로호칭되고있는물질은 물론소위점착제로호칭되는소재또는점접착제로호칭되는소재등을 사용하여형성된층도포괄하는용어이다.
[13] 본출원에따른봉지필름은블록공중합체및다관능성올리고머를포함한다. 상기블록공중합체는유리전이온도가 0ᄋ 0이상인단량체로부터유도되는제 1 블록을가질수있다.또한,상기봉지필름은 25°0온도및 60%상대습도 조건에서길이방향으로 200%（기존길이의 2배）연신하여 24시간방치후, 연신한힘을제거하고 1시간이후길이를측정했을때,복원되는정도가기존 길이의 0%이내일수있다.상기에서,길이방향이란다각형형상의봉지 필름에서의어느한변의방향을의미할수있고,구체예에서,장변의방향을 의미할수있다.상기복원정도는예를들어, 109%이하, 108%이하, 107%이하, 106%이하, 105%이하, 104%이하,또는 103%이하일수있고,하한은특별히 제한되지않고, 98%이상, 100%이상, 101%이상또는 102%이상일수있다.본 출원은상기봉지필름의복원정도를조절함으로써,플렉서블유기전자장치에 적용되어폴딩됨에따라발생하는응력을완화하면서롤링후에도우수한 복원력을가지는물성을가질수있다.
[14] 상기봉지필름은후술하는바와같이봉지층을포함할수있고,상기봉지층을 구성하는봉지조성물은다음의조성을가질수있다.하나의예시에서,상기 봉지필름은상기블록공중합체및다관능성올리고머를각각 30내지 90 2020/175958 1»（：1^1{2020/002899
3 중량부및 5내지 48중량부; 35내지 85중량부및 내지 45중량부; 42내지 80 중량부및 15내지 40중량부또는 47내지 70중량부및 20내지 38중량부의 비율로포함할수있다.
[15] 기존의올레핀계수지는투습도가낮은성질을갖고,경화물의탄성이낮아 후술하는수분흡착제를다량포함할수있어서,수분차단성은매우
우수했으나,복원력이부족하여변형후원래상태로복원이어려운단점이 있었다.다만,복원력을높이기위해수지성분으로서경화후탄성이높은 수지를사용하게될경우,수분차단성이저하되는문제를갖는다.본줄원은 상기언급하고있는봉지필름을유기전자장치에적용함에따라,외부로부터 유입되는수분또는산소를차단하면서도폴딩또는롤링에도불구하고우수한 복원력및가혹조건에서의내구신뢰성을구현할수있다.
[16] 본명세서에서정의되는단량체의유리전이온도는상기의단량체가단독
중합체로중합되었을때,그중합체의유리전이온도일수있다.즉,상기블록 공중합체에서제 1블록을구성하는유리전이온도가 0 이상인단량체는,상기 단량체로단독중합체를형성했을때,중합체의유리전이온도가 0ᄋ 0이상이되는 단량체일수있다.
[17] 본출원의구체예에서,상기블록공중합체는제 2블록을추가로포함할수 있고,상기제 2블록은제 1블록보다유리전이온도가더낮을수있다.일 예시에서 ,상기제 2블록은유리전이온도가 0°0미만, -10°0이하, -30°0이하 또는 -50°0이하인단량체로부터유도될수있다.상기단량체의유리전이온도의 하한은특별히한정되지않으며 -300ᄋ（:일수있다.또한,상기제 1블록을 구성하는단량체는유리전이온도가 0°0이상, 50°0이상, 70°0이상또는 90°0 이상일수있다.상기제 1블록단량체의유리전이온도상한은 300ᄋ（：일수있다. 본출원은상기블록공중합체의각블록의유리전이온도를조절함으로써,수분 차단성과함께동시에폴딩또는롤링에서의우수한복원력을구현할수있다.
[18] 본출원에서용어 「단량체로부터유도된블록」 이란,공중합체의블록에서 중합단위가상기단량체의중합반응으로부터이루어진것을의미할수있다.
[19] 하나의예시에서，상기블록공중합체를이루는단량체는예를들어 ,올레핀계 단량체를포함할수있다.즉,상기제 1블록및제 2블록중적어도하나는 올레핀계단량체를포함할수있다.상기올레핀계단량체는예를들어,에틸렌, 프로필렌, 1 -부텐, 2 -부텐,이소부틸렌,이소프렌，스티렌또는부타디엔을포함할 수있다.일구체예에서,상기올레핀계화합물은디엔화합물일수있다.
[2이 상기제 1블록을구성하는단량체및제 2블록을구성하는단량체각각은
전술한유리전이온도를만족하는한그종류는특별히제한되지않는다.상기제 1블록또는제 2블록을구성하는단량체는예를들어,탄소수 2내지 12, 3내지 10또는 3내지 8의단량체일수있다.또한,상기제 1블록또는제 2블록을 구성하는단량체는 1또는 2내지 3의불포화탄화수소결합을가질수있다. 상기제 2블록을구성하는단량체는분자구조내에환형구조를가질수있다. 2020/175958 1»（：1^1{2020/002899
4 또한,상기 제 2블록을구성하는단량체는중합후에도분자구조내에
불포화기를가질수있고,또한,분자구조내에방향족기를가질수있다.
[21] 상기단량체의종류에따라,본출원에따른블록공중합체는분자구조내에 불포화기를적어도하나이상포함할수있다.즉,상기 단량체는중합단위 이외에불포화기를하나이상포함할수있다.다만,상기봉지필름경화후에는 상기불포화기중일부또는전부가다관능성올리고머또는반응성모노머와 가교되어 있을수있다.
[22] 본출원은상기의블록공중합체를사용함으로써 ,공정성 ,가교도및복원
성능과같은물성을유지할수있어유기전자장치에 적용시 필름자체의 내구성을확보할수있다.
[23] 본출원에서상기블록공중합체는봉지조성물이필름형상으로성형이
가능한정도의중량평균분자량 (MW.Weight Average Molecular Weight)을가질수 있다.예를들면,상기고분자는 10,000 g/mol내지 2,000,000 g/mol, 20,000내지 1,500,000 g/mol, 30,000내지 1,000,000 g/mol, 40,000내지 80,000 g/mol, 50,000 내지 500,000 g/mol, 80,000내지 300,000 g/mol또는 90,000내지 200,000 g/mol 정도의중량평균분자량을가질수있다.본출원에서용어중량평균분자량은, GPC(Gel permeation Chromatograph)로즉정한표준를리스티렌에 대한환산 수치를의미한다.
[24] 전술한바와같이,본출원의봉지필름은다관능성올리고머를포함할수있다. 상기다관능성올리고머는경화성올리고머일수있고,상기올리고머는열경화 또는광경화성올리고머일수있다.
[25] 하나의 예시에서 ,상기다관능성올리고머는활성에너지선중합성 관능기를 2개 이상포함하는화합물일수있다.상기관능기의수는특별히 제한되지 않으나, 2내지 8의 범위내일수있다.또한,상기다관능성올리고머는후술하는 모노머와달리중량평균분자량이 500g/mol내지 50,000g/mol의범위 내일수 있다.상기다관능성올리고머의중량평균분자량의하한은 800g/mol, 1000g/mol, 1200g/mol, 1500g/mol, 2000g/mol또는 3000g/mol일수있다.또한,상기다관능성 올리고머의중량평균분자량의상한은 40,000g/mol, 35,000g/mol, 25,000g/mol, 15,000g/mol, 10,000g/mol또는 9,000g/mol일수있다.상기다관능성올리고머는 아크릴화합물또는비닐화합물일수있으나,이에 한정되는것은아니다.본 줄원은상기의다관능성올리고머를전술한블록공중합체와특정함량 포함함으로써,우수한복원특성 및가혹조건에서의내구신뢰성을구현한다.
[26] 하나의 예시에서 ,봉지 필름은반응성모노머를추가로포함할수있다.상기 반응성모노머는광경화성또는열경화성모노머일수있다.예시적인,반응성 모노머는중량평균분자량이 500 g/mol미만, 400 g/mol미만, 50내지 390 g/mol 또는 100내지 350 g/mol의 범위내에 있을수있다.
[27] 일예시에서 ,상기 반응성모노머는관능기를 1개또는 2개 이상포함할수
있으며,상한은특별히 한정되지 않고 8개 이하의반응성 관능기를포함할수 2020/175958 1»（：1^1{2020/002899
5 있다.하나의 예시에서,상기반응성모노머는활성에너지선중합성관능기를 하나이상포함할수있다.즉,상기반응성모노머는단관능성화합물또는 다관능성화합물일수있다.또한,상기반응성모노머는아크릴화합물또는 비닐화합물일수있다.
[28] 본출원의구체예에서,상기봉지필름이반응성모노머를포함할경우,블록 공중합체 ,다관능성올리고머및반응성모노머는각각 30내지 90중량부, 5 내지 48중량부및 1내지 40중량부; 35내지 85중량부, 10내지 45중량부및 2 내지 38중량부; 42내지 80중량부, 15내지 40중량부및 3내지 33중량부;또는 47내지 70중량부, 20내지 38중량부및 4내지 28중량부포함될수있다.
[29] 일예시에서 ,상기봉지필름은상기블록공중합체를 100중량부기준으로할 때,상기다관능성올리고머는블록공중합체 100중량부에대하여 20내지 95 중량부, 30내지 93중량부, 35내지 90중량부, 40내지 85중량부, 43내지 83 중량부, 48내지 70중량부, 49내지 60중량부, 53내지 60중량부또는 49내지 55 중량부의범위내로포함될수있다.또한,상기반응성모노머는상기블록 공중합체 100중량부에대하여 3내지 70중량부, 4내지 65중량부, 5내지 60 중량부, 6내지 58중량부, 7내지 53중량부, 10내지 52중량부, 13내지 48 중량부, 15내지 32중량부, 20내지 55중량부또는 5내지 16중량부의범위내로 포함될수있다.또한상기블록공중합체는상기봉지필름을구성하는봉지
Figure imgf000006_0001
\ %또는 45 \ %내지 55 \ %의범위내로포함될수있다.본출원은상기각 조성의함량비율을조절함으로써 ,수분차단성을가지면서도적정범위의 가교도를구현하여목적하는탄성을가지며,이로써변형후복원력과함께가혹 조건에서의내구신뢰성을함께구현할수있다.
[3이 하나의예시에서，필요한경우,상기봉지필름은점착부여제를추가로포함할 수있으며,상기점착부여제는수소화된환형올레핀계중합체일수있다.점착 부여제로는,예를들면,석유수지를수소화하여얻어지는수소화된석유수지를 사용할수있다.수소화된석유수지는부분적으로또는완전히수소화될수 있으며，그러한수지들의혼합물일수도있다.이러한점착부여제는봉지 조성물과상용성이좋으면서도수분차단성이우수하고,유기휘발성분이낮은 것을선택할수있다.수소화된석유수지의구체적인예로는,수소화된 테르펜계수지,수소화된에스테르계수지또는수소화된
다이사이클로펜타디엔계수지등을들수있다.상기점착부여제의
중량평균분자량은약 200내지 5,00 /11101일수있다.상기점착부여제의 함량은필요에따라적절하게조절할수있다.예를들면,점착부여제의함량은 봉지조성물의고형분 0중량부대비 5중량부내지 0중량부또는 20내지 40중량부의비율로포함될수있다.
[31] 본줄원의구체예에서 ,봉지조성물은상기블록공중합체 ,다관능성올리고머 2020/175958 1»（：1^1{2020/002899
6 또는반응성모노머의종류에따라서,경화제또는개시제를추가로포함할수 있다.예를들어 ,전술한블록공중합체,다관능성올리고머또는반응성 모노머와반응하여 ,가교구조등을형성할수있는경화제또는경화반응을 개시시킬수있는양이온개시제또는라디칼개시제를추가로포함할수있다. 양이온개시제로는양이온광중합개시제또는양이온열개시제를사용할수 있다.
[32] 하나의 예시에서 ,양이온광중합개시제로는,오늄염 (onium salt)또는
유기금속염 (organometallic salt)계열의 이온화양이온개시제또는유기실란 또는잠재성황산 (latent sulfonic acid)계열이나비이온화양이온광중합 개시제를사용할수있다.오늄염 계열의 개시제로는,디아릴이오도늄 염 (diaryliodonium salt),트리아릴술포늄염 (triarylsulfonium salt)또는
아릴디아조늄염 (aryldiazonium salt)등이 예시될수있고,유기금속염 계열의 개시제로는철아렌 (iron arene)등이 예시될수있으며,유기실란계열의 개시제로는, 0-니트릴벤질트리아릴실리 에테르 (o-ni仕 obenzyl triaryl silyl ether), 트리아릴실리퍼옥시드 (triaryl silyl peroxide)또는아실실란 (acyl silane)등이 예시될수있고,잠재성 황산계열의 개시제로는 a-설포닐옥시 케톤또는 a-히드록시메틸벤조인설포네이트등이 예시될수있으나,이에제한되는것은 아니다.
[33] 하나의 예시에서 ,개시제는,상기봉지조성물의고형분 100중량부에 대하여 , 0.01중량부내지 20중량부, 0.04중량부내지 W중량부또는 0.1중량부내지 5 중량부로포함될수있다.
[34] 본출원의봉지필름은필요에따라,수분흡착제를포함할수있다.용어
「수분흡착제」 는물리적또는화학적 반응등을통해,외부로부터유입되는 수분또는습기를흡착또는제거할수있는성분을총칭하는의미로사용될수 있다.즉,화학반응성흡착제또는물리적흡착제를의미하며,그혼합물도사용 가능하다.
[35] 상기화학반응성흡착제는접착제내부로유입된습기,수분또는산소등과 화학적으로반응하여수분또는습기를흡착한다.상기물리적흡착제는봉지 구조로침투하는수분또는습기의 이동경로를길게하여그침투를억제할수 있고,접착수지의 매트릭스구조및수분반응성흡착제등과의상호작용을 통해수분및습기에 대한차단성을극대화할수있다.
[36] 본출원에서사용할수있는수분흡착제의구체적인종류는특별히 제한되지 않으며,예를들면,화학반응성흡착제의경우,알루미나등의금속분말, 금속산화물,금속염또는오산화인 (P205)등의 일종또는이종이상의혼합물을 들수있고,물리적흡착제의경우,제올라이트,티타니아,지르코니아또는 몬모릴로나이트등을들수있다.
[37] 상기에서금속산화물의구체적인예로는,알루미나,산화리튬 (Li20),
산화나트륨 (Na20),산화바륨 (BaO),산화칼슘 (CaO)또는산화마그네슘 (MgO) 2020/175958 1»（：1^1{2020/002899
7 등을들수있고,금속염의예로는,황산리튬山切어),황산나트륨어¾804), 황산칼슘 (0&304),황산마그네슘 (MgS04),황산코발트 ( 04),황산갈륨 ¾ 04) 3),황산티탄 (끄 04)2)또는황산니켈어 04)등과같은황산염,
Figure imgf000008_0001
염화마그네슘 (MgCl2),염화스트론튬(¾(¾),염화이트륨 (¾),염화구리 (( (：12), 불화세슘 (081:),불화탄탈륨 불화니오븀(에 5),브롬화리튬(니¾),
브롬화칼슘 (0&¾2),브롬화세슘片 八브롬화셀레늄 八브롬화바나듐 0/¾3 ),브롬화마그네슘 (MgBr2),요오드화바륨여산2)또는요오드화마그네슘 (MgI2) 등과같은금속할로겐화물;또는과염소산바륨여 (：104)2)또는
과염소산마그네슘 ( ((：104)2)등과같은금속염소산염등을들수있으나,이에 제한되는것은아니다.
[38] 본출원에서는상기금속산화물등과같은수분흡착제를적절히가공한
상태로조성물에배합할수있다.예를들어,전술한봉지조성물을필름형태로 제조한접착제를,적용하고자하는유기전자장치의종류에따라두께가 100 ^ 이하, 80 01이하, 50 01이하또는 30 01이하의박막으로형성할수있고,이경우 수분흡착제의분쇄공정이필요할수있다.수분흡착제의분쇄에는, 3롤밀, 비드밀또는볼밀등의공정이이용될수있다.
[39] 본출원의봉지필름은수분흡착제를,상기블록공중합체 100중량부에
대하여, 5중량부내지 200중량부, 8내지 190중량부, 중량부내지 180 중량부, 20내지 150중량부, 50내지 130중량부, 60내지 100중량부또는 70 내지 90중량부의양으로포함할수있다.수분흡착제는임의적성분으로서 포함되지않을수있으나,바람직하게수분흡착제의함량을 5중량부이상으로 제어함으로써,경화물이우수한수분및습기차단성을나타내도록할수있다. 또한,수분흡착제의함량을 200중량부이하로제어하여 ,박막의봉지구조를 형성하면서도,우수한수분차단특성을나타내도록할수있다.
[4이 본명세서에서는,특별히달리규정하지않는한,단위 「중량부」 는각
성분간의중량비율을의미한다.
[41] 본출원의봉지필름은필요에따라,필러,바람직하게는무기필러를포함할수 있다.필러는봉지구조로침투하는수분또는습기의이동경로를길게하여그 침투를억제할수있고,수지성분의매트릭스구조및수분흡착제등과의상호 작용을통해수분및습기에대한차단성을극대화할수있다.본출원에서 사용할수있는필러의구체적인종류는특별히제한되지않으며,예를들면, 실리카,클레이,또는탈크등의일종또는이종이상의혼합을사용할수있다.
[42] 본출원에서는또한,필러및유기바인더와의결합효율을높이기위하여,상기 필러로서유기물질로표면처리된제품을사용하거나,추가적으로커플링제를 첨가하여사용할수있다.
[43] 본출원의봉지필름은,블록공중합체 100중량부에대하여 0중량부내지 50 중량부, 1중량부내지 40중량부,또는 1중량부내지 20중량부의필러를포함할 수있다.본출원에서,필러는임의적성분으로서접착제에포함되지않을수 2020/175958 1»（：1^1{2020/002899
8 있으나, 1중량부이상으로제어하여,우수한수분또는습기차단성 및기계적 물성을가지는봉지구조를제공할수있다.또한,본출원에서필러 함량을 50 중량부이하로제어함으로써，필름형태의제조가가능하며 ,박막으로형성된 경우에도우수한수분차단특성을나타내는경화물을제공할수있다.
[44] 또한,하나의 예시에서봉지필름은수분흡착제등이균일하게분산될수
있도록분산제를추가로포함할수있다.여기서사용될수있는분산제로는, 예를들면,수분흡착제의표면과친화력이 있고,접착수지와상용성이좋은 비이온성 계면활성제등을사용할수있다.
[45] 하나의 예시에서 ,상기봉지필름은실란커플링제를추가로포함할수있다. 상기실란커플링제는예를들어, 3 -메타크릴록시프로필트리메톡시실란,
3 -메타크릴록시프로필트리에톡시실란, 3 -아크릴록시프로필트리메톡시실란,
3 -아크릴록시프로필트리에톡시실란, 3 -메타크릴록시 메틸트리에톡시실란,
3 -메타크릴록시 메틸트리메톡시실란, 3 -아크릴록시프로필메틸디메톡시실란, 메타크릴록시 메틸메틸디메톡시실란,메타크릴록시 메틸메틸디에톡시실란, 메타크릴록시프로필메틸디메톡시실란,메타크릴록시프로필
메틸디에톡시실란,메타크릴록시프로필디메틸메톡시실란또는메타크릴록시 프로필디메틸에톡시실란일수있다.상기실란커플링제는봉지조성물이 필름으로제조되어 적용될경우,계면점착력을상승시키는역할을할수있다. 상기실란커플링제는예를들어,상기블록공중합체 ^0중량부에 대하여 0.1 중량부내지 10중량부, 0.5내지 8중량부, 0.8중량부내지 5중량부, 1중량부 내지 5중량부, 1중량부내지 4.5중량부,또는 1중량부내지 2중량부포함될수 있다.
[46] 본출원에 따른봉지 필름에는상술한구성외에도전술한발명의 효과에
영향을미치지 않는범위에서 ,용도,수지성분의종류및후술하는접착제층의 제조공정에따라다양한첨가제가포함될수있다.예를들어,봉지조성물은 커플링제,가교제,경화성물질,자외선안정제또는산화방지제등을목적하는 물성에 따라적정 범위의함량으로포함할수있다.
[47] 본출원에 따른봉지 필름은전술한봉지조성물을포함하는봉지층을포함할 수있다.상기에서봉지 필름은단일층구조또는 2층이상의다층구조일수 있다.예를들어,상기봉지 필름은 2층이상의다층구조의봉지층을포함할수 있고,상기 2개 이상의봉지층조성은동일하거나상이할수있으며,다층구조 중적어도한층이상이 전술한봉지조성물을포함할수있다.
[48] 본출원의봉지필름의구조는특별히 제한되는것은아니나,일례로,기재필름 또는이형필름（이하, 「제 1필름」 이라칭하는경우가있다.）;및상기 기재필름 또는이형필름상에 형성되는상기봉지층을포함하는구조를가질수있다.
[49] 본출원의봉지필름은,또한상기봉지층상에 형성된기재필름또는이형 필름（이하, 「제 2필름」 이라칭하는경우가있다.）을추가로포함할수있다.
[5이 본출원에서사용할수있는상기 제 1필름의구체적인종류는특별히 2020/175958 1»（：1^1{2020/002899 한정되지않는다.본출원에서는상기제 1필름으로서,예를들면,이분야의 일반적인고분자필름을사용할수있다.본출원에서는,예를들면,상기기재 또는이형필름으로서,폴리에틸렌테레프탈레이트필름,
폴리테트라플루오르에틸렌필름,폴리에틸렌필름,폴리프로필렌필름, 폴리부텐필름,폴리부타디엔필름,염화비닐공중합체필름,폴리우레탄필름, 에틸렌-비닐아세테이트필름,에틸렌-프로필렌공중합체필름,
에틸렌-아크릴산에틸공중합체필름,에틸렌-아크릴산메틸공중합체필름또는 폴리이미드필름등을사용할수있다.또한,본출원의상기기재필름또는이형 필름의일면또는양면에는적절한이형처리가수행되어있을수도있다.기재 필름의이형처리에사용되는이형제의 예로는알키드계,실리콘계,불소계, 불포화에스테르계,쓸리올레핀계또는왁스계등을사용할수있고,이중 내열성측면에서알키드계,실리콘계또는불소계이형제를사용하는것이 바람직하지만,이에제한되는것은아니다.
[51] 또한,본출원에서사용될수있는제 2필름（이하, 「커버필름」 이라칭하는 경우가있다.）의종류역시특별히한정되지않는다.예를들면,본출원에서는, 상기제 2필름으로서,전술한제 1필름에서 예시된범주내에서,제 1필름과 동일하거나,상이한종류를사용할수있다.또한,본출원에서는상기제 2 필름에도역시적절한이형처리가수행되어사용될수있다.
[52] 본출원에서상기와같은기재필름또는이형필름（제 1필름）의두께는특별히 한정되지않고,적용되는용도에따라서적절히선택될수있다.예를들면,본 출원에서상기제 1필름의두께는 10 내지 500 ,바람직하게는 20 내지 200 ^정도일수있다.상기두께가 10 ^미만이면제조과정에서기재필름의 변형이쉽게발생할우려가있고, 500 를초과하면,경제성이떨어진다.
[53] 또한,본출원에서상기제 2필름의두께역시특별히제한되지않는다.본
출원에서는,예를들면,상기제 2필름의두께를제 1필름과동일하게설정할 수도있다.본출원에서는또한,공정성등을고려하여제 2필름의두께를제 1 필름에비하여상대적으로얇게설정할수도있다.
[54] 본출원의봉지필름에포함되는봉지층의두께는특별히제한되지않고，상기 필름이적용되는용도를고려하여하기의조건에따라적절하게선택할수있다. 본출원의봉지필름에포함되는봉지층의두께는 5 내지 200 /패,
바람직하게는 10 ^내지 150 01정도일수있다.
[55] 한편,본출원의봉지필름은상기기재필름으로서,메탈층을포함할수있다. 상기기재필름은이형필름과달리박리되지않을수있다.메탈층은예를들어, 3^111내지 500//111, 10^111내지 450^01, 20^01내지 400//111, 30^01내지 350^01또는 40;· 내지 200//111의두께범위를가질수있다.상기메탈층은박막의메탈포일 1 &11）또는고분자기재층상에메탈층이배치되어 있을수있다.상기고분자 기재층은전술한봉지층이메탈층과부착되는면의반대면에위치하여 보호층의역할을할수있다.메탈층은금속,산화금속,질화금속,탄화금속, 2020/175958 1»（：1^1{2020/002899
10 옥시질화금속,옥시붕화금속,및그의배합물중에서어느하나를포함할수 있다.예컨대,메탈층은하나의금속에 1이상의금속원소또는비금속원소가 첨가된합금을포함할수있고,예를들어,인바 (11 따),스테인레스스틸 1¾)을 포함할수있다.또한,하나의 예시에서메탈층은철,크롬,구리,알루미늄니켈, 산화철,산화크롬,산화실리콘,산화알루미늄,산화티타늄,산화인둠,산화주석, 산화주석인듐,산화탄탈룸,산화지르코늄,산화니오븀,및그들의배합물을 포함할수있다.
[56]
[57] 본줄원은또한,유기전자장치에관한것이다.상기유기전자장치는늘렉서블 유기전자장치또는롤러블유기전자장치일수있다.상기유기전자장치는 전술한봉지필름을포함할수있다.예시적인유기전자장치는,도 1에도시된 바와같이 ,기판 (1),상기기판상에형성된유기전자소자 (2)및상기
유기전자소자 (2)의전면을봉지하는봉지필름 (3)을포함할수있다.도 1은 예시적으로봉지필름이봉지층 (3)및메탈층 (4)을포함하는구조이다.
[58] 기판영역의상부에존재하는유기전자소자는제 1전극층과제 2전극층을 포함하고,제 1및제 2전극층의사이에존재하는유기층을또한포함할수있다. 제 1및제 2전극층은,유기전자장치에서통상사용되는정공주입성또는전자 주입성전극층일수있다.제 1및제 2전극층중어느하나는정공주입성 전극층으로형성되고,다른하나는전자주입성전극층으로형성될수있다.제 1 및제 2전극층중어느하나는투명전극층으로형성되고,다른하나는반사 전극증으로형성될수있다.
[59] 제 1및제 2전극층의사이에는유기층이존재한다.상기유기층은적어도
2개의발광유닛을포함할수있다.이와같은구조에서발광유닛에서발생한 광은반사전극층에의해반사되는과정등을거쳐서투명전극층측으로방출될 수있다.
[6이 유기층의구체적인구조는특별히제한되지않는다.이분야에서는정공또는 전자주입전극층과유기층,예를들면,발광유닛,전자주입또는수송층,정공 주입또는수송층을형성하기위한다양한소재및그형성방법이공지되어 있으며 ,상기유기전자장치의제조에는상기와같은방식이모두적용될수 있다.
[61] 또한,본출원의유기전자소자는보호층을포함할수있다.상기보호층은
전극의손상을방지할수있는것으로서,본기술분야의통상의소재로구성될 수있으며,예를들어,무기물로서 또는신203등을증착한무기층및 유기층이교대적층되어 있을수있다.
[62]
[63] 본출원은또한,상기유기전자장치의제조방법에관한것이다.
[64] 상기제조방법은상부에유기전자소자가형성된기판상에전술한봉지봉지 필름이상기유기전자소자를커버하도록적용하는단계를포함할수있다.상기 2020/175958 1»（：1^1{2020/002899
11 봉지필름은상기유기전자소자를커버하기전또는후에경화될수있다.
[65] 본명세서에서용어 「경화」 란가열또는 조사공정등을거쳐본발명의 봉지조성물이가교구조를형성하여점착제또는접착제의형태로제조하는 것을의미할수있다.
[66] 본출원의제조방법은기판으로사용되는고분자필름상에진공증착또는 스퍼터링등의방법으로전극을형성하고,상기전극상에예를들면,정공 수송층,발광층및전자수송층등으로구성되는발광성유기재료의층을 형성한후에그상부에전극층을추가로형성하여유기전자소자를형성할수 있다.이어서,상기공정을거친기판에서소자가형성된면에상기소자를전면 봉지하도록전술한봉지필름을위치시킨다.이어서라미네이트기등을 사용하여상기봉지필름을가열하여유동성을부여한상태에서압착할수있다.
[67] 상기에서유기전자장치의제조방식의하나의예시를언급하였으나,상기
유기전자장치는다른방식으로도제조될수있다.예를들면,상기와같은 방식으로장치의제조를진행하되,공정의순서내지는조건등이변경될수 있다.
발명의효과
[68] 본출원은우수한수분차단특성을구현할뿐만아니라,플랙서블하고
롤러블한특성을가지면서소성변형이일어나지않고우수한복원력을가지는 봉지필름및이를포함하는유기전자장치를제공한다.
도면의간단한설명
[69] 도 1은예시적인유기전자장치를나타내는단면도이다.
이 [부호의설명]
] 1:기판
2] 2:유기전자소자
3] 3:봉지층또는봉지필름
4] 4:메탈층
발명의실시를위한최선의형태
5] 이하본발명에따르는실시예및본발명에따르지않는비교예를통하여본 발명을보다상세히설명하나,본발명의범위가하기제시된실시예에의해 제한되는것은아니다.
6]
7] 실시예 1
Figure imgf000012_0001
CN9021NS:TMPTA）의중량비율로반응용기에투입하고,광개시제로서 2020/175958 1»（：1^1{2020/002899
12
1 -hydroxy-cyclohexylphenyl ketone (Irgarcure 184, Ciba사)를 5중량부,수분 흡착제로서 CaO(Aldrich사)를 50중량부및실란커플링제 (KBM-5103,
Shin-Etsu사)를 0.5중량부로투입한뒤,톨루엔으로고형분이 40중량%정도가 되도록희석하여봉지조성물코팅용액을제조하였다.
9] 상기준비된용액을이형 PET의이형면에도포하고 110OC오븐에서 3분간 건조하여두께 50/ffli의봉지층을형성하여봉지필름을제조하였다.
[8이
[81] 실시예 2
[82] 블록공중합체로서스티렌-부타디엔-스티렌공중합체 (SBS, Mw: 10만 g/mol, LG화학),다관능성올리고머로서우레탄아크릴레이트올리고머 (CN9021NS, Mw: 5000g/mol, Satomer사)및트리메티롤프로판트리아크릴레이트 (TMPTA, Aldrich사)을각각 50:25:25(SBS: CN9021NS:TMPTA)의중량비율로반응용기에 투입한것을제외하고,실시예 1과동일한방법으로봉지조성물및봉지필름을 제조하였다.
[83]
[84] 실시예 3
[85] 블록공중합체로서스티렌-부타디엔-스티렌공중합체 (SBS, Mw: 10만 g/mol, LG화학),다관능성올리고머로서우레탄아크릴레이트올리고머 (CN9021NS, Mw: 5000g/mol, Satomer사)및반응성모노머로서라우릴아크릴레이트 (LA, Aldrich사)을각각 60:35:5(SBS:CN9021NS:LA)의중량비율로반응용기에 투입한것을제외하고,실시예 1과동일한방법으로봉지조성물및봉지필름을 제조하였다.
[86]
[87] 비교예 1
[88] 다관능성올리고머로서 CN9021NS대신,단관능성올리고머인우레탄
아크릴레이트올리고머 (CN1073NS, Mw: 3000g/mol)을사용한것을제외하고, 실시예 1과동일한방법으로봉지조성물및봉지필름을제조하였다.
[89]
[9이 비교예 2
[91] 스티렌-부타디엔-스티렌블록공중합체대신,랜덤공중합체
이소부틸렌-이소프렌고무 (IIR, Exxon사)를사용한것을제외하고,실시예 1과 동일한방법으로봉지조성물및봉지필름을제조하였다.
[92]
[93] 비교예 3
[94] 블록공중합체로서스티렌-부타디엔-스티렌공중합체 (SBS, Mw: 10만 g/mol, LG화학),다관능성올리고머로서우레탄아크릴레이트올리고머 (CN9021NS, Mw: 5000g/mol, Satomer사)및반응성모노머로서트리메티롤프로판
트리아크릴레이트 (TMPTA, Aldrich사)을각각 20:60:20(SBS: 2020/175958 1»（：1^1{2020/002899
13
CN9021NS:TMPTA）의중량비율로반응용기에투입한것을제외하고,실시예 1과동일한방법으로봉지조성물및봉지필름을제조하였다.
[95]
[96] 상기제조된봉지필름의물성에대해하기와같이평가하였다.물성의평가는 상기봉지필름을경화한후진행하였고,열경화의
Figure imgf000014_0001
경화, UV경화의경우 lJ/cm2이상자외선을조사하였다.
[97]
[98] 실험예 1 -복원특성
[99] 실시예및비교예에서제조한봉지필름을, 25OC온도및 60%상대습도
조건에서길이방향으로 200%（기존길이의 2배）연신하여 24시간방치후, 연신한힘을제거하고 1시간이후길이를측정했을때,복원되는정도를 평가하였다.
0이
[101] 실험예 2 -내열내구성
[102] 실시예및비교예에서제조한필름을 Soda lime glass에라미네이션하고, Soda lime glass를진공합착하여샘플을제조하였다.제조된샘플에대해 85OC오븐에 W00시간방치하여변화를관찰하였다.글라스기판과봉지필름사이의기포가 발생하였는지관찰하였다.육안으로보았을때,글라스기판과봉지필름사이의 기포가하나라도발생한경우 X,발생하지않은경우 0로표시하였다.
[103]
[104] 실험예 3 -내습열내구성
[105] 실험예 2에서제조한샘플에대해 85OC및 85%상대습도하에서 1000시간 방치하여변화를관찰하였다.
[106] 글라스기판과봉지필름사이의계면에서들뜸이발생하였는지관찰하였다. 육안으로보았을때,글라스기판과봉지필름사이의계면에서들뜸이하나라도 발생한경우 X,발생하지않은경우 0로표시하였다.
[107]
[108] 실험예 4 -수분차단성능
[109] 100mm X 100mm크기의글라스기판상에칼슘을 5mm x 5mm의크기및
W0nm의두께로증착하고,상기칼슘을모두덮도록실시예및비교예의봉지 필름을적용하였다.상기필름상에 100mm x 100mm크기의커버글라스로합착 후,앞서기재한경화조건으로경화하였다.상기얻어진시편들을 85OC및 85% 상대습도의항온항습챔버에서관찰하여수분침투로인한산화반응에의하여 칼슘이투명해지는것을관찰한다.수분이 3mm침투하는데（투명화되는데） 걸리는시간을측정하였다. 2020/175958 1»（：1/10公020/002899
14
이 [표 1]
Figure imgf000015_0001
[111]

Claims

2020/175958 1»（：1^1{2020/002899
15 청구범위
［청구항 1］ 유리전이온도가 0ᄋ 0이상인단량체로부터유도되는제 1블록을갖는 블록공중합체및다관능성올리고머를포함하고, 25°0온도및 60%상대 습도조건에서길이 방향으로 200%（기존길이의 2배）연신하여 24시간 방치후,연신한힘을제거하고 1시간이후길이를측정했을때,복원되는 정도가기존길이의 0%이내인봉지 필름.
［청구항 2］ 제 1항에 있어서,블록공중합체 및다관능성올리고머는각각 30내지 90 중량부및 5내지 48중량부의비율로포함되는봉지 필름.
［청구항 3］ 제 1항에 있어서,블록공중합체는제 2블록을추가로포함하고,상기제
2블록은제 1블록보다유리전이온도가더낮은봉지필름.
［청구항 4］ 제 3항에 있어서 ,제 2블록은유리전이온도가 0°0미만인단량체로부터 유도되는봉지필름.
［청구항 5］ 제 1항에 있어서,제 1블록은유리전이온도가 50°0내지 300°0인
단량체로부터유도되는봉지 필름.
［청구항 6］ 제 1항에 있어서,블록공중합체는분자구조내에불포화기를적어도 하나이상포함하는봉지필름.
［청구항 7］ 제 1항에 있어서,블록공중합체는중량평균분자량이 10,000 ^0\내지
2,000,000은如이의 범위내에 있는봉지 필름.
［청구항 8］ 제 1항에 있어서,다관능성올리고머는활성에너지선중합성 관능기를 2 이상포함하는봉지 필름.
［청구항 9］ 제 1항에 있어서,다관능성올리고머는중량평균분자량이 50 /11101내지
50,00 /11101범위내에 있는봉지 필름.
［청구항 ］ 제 1항에 있어서,다관능성올리고머는아크릴화합물또는비닐
화합물을포함하는봉지 필름.
［청구항 11］ 제 1항에 있어서,반응성모노머를추가로포함하는봉지필름.
［청구항 12］ 제 11항에 있어서,반응성모노머는활성에너지선중합성 관능기를하나 이상포함하는봉지 필름.
［청구항 제 11항에 있어서,반응성모노머는단관능성또는다관능성의아크릴 화합물또는비닐화합물을포함하는봉지필름.
［청구항 14］ 제 10항에 있어서,블록공중합체,다관능성올리고머 및반응성
모노머는각각 30내지 90중량부, 5내지 48중량부및 1내지 40중량부의 비율로포함되는봉지 필름.
［청구항 15］ 제 1항에 있어서,다관능성올리고머는블록공중합체 100중량부에
대하여 20내지 95중량부의 범위내로포함되는봉지 필름.
［청구항 16］ 제 1항에 있어서,수분흡착제를추가로포함하는봉지필름.
［청구항 17］ 제 16항에 있어서,수분흡착제는블록공중합체 100중량부에 대하여 5 내지 200중량부의 범위내로포함되는봉지 필름. 2020/175958 1»（：1^1{2020/002899
16
［청구항 18］ 제 1항에 있어서,경화제또는개시제를추가로포함하는봉지 필름.
［청구항 19］ 제 1항에 있어서,실란커플링제를추가로포함하는봉지필름.
［청구항 2이 제 1항에 있어서,봉지층을포함하고,상기봉지층은단일층또는 2층 이상의다층구조인봉지필름.
［청구항 21］ 기판;상기기판상에 형성된유기전자소자;및상기유기전자소자의 전면을봉지하는제 1항에 따른봉지 필름을포함하는유기전자장치. ［청구항 22］ 상부에유기전자소자가형성된기판상에 제 1항에따른봉지봉지 필름이상기유기전자소자를커버하도록적용하는단계를포함하는 유기전자장치의 제조방법.
PCT/KR2020/002899 2019-02-28 2020-02-28 봉지 필름 Ceased WO2020175958A1 (ko)

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FR3150209B1 (fr) * 2023-06-22 2025-07-04 Arkema France Composition photopolymérisable adhésive pour l’encapsulation de dispositifs électroniques ou optoélectroniques

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