WO2012090857A1 - 屋外用ウレタン接着剤 - Google Patents
屋外用ウレタン接着剤 Download PDFInfo
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- WO2012090857A1 WO2012090857A1 PCT/JP2011/079810 JP2011079810W WO2012090857A1 WO 2012090857 A1 WO2012090857 A1 WO 2012090857A1 JP 2011079810 W JP2011079810 W JP 2011079810W WO 2012090857 A1 WO2012090857 A1 WO 2012090857A1
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- Prior art keywords
- outdoor
- polyol
- urethane adhesive
- solar cell
- isocyanate
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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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4063—Mixtures of compounds of group C08G18/62 with other macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
- C08G18/4216—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols from mixtures or combinations of aromatic dicarboxylic acids and aliphatic dicarboxylic acids and dialcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4286—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones prepared from a combination of hydroxycarboxylic acids and/or lactones with polycarboxylic acids or ester forming derivatives thereof and polyhydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/7642—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
- C08G18/8029—Masked aromatic polyisocyanates
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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
- 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
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
- H10F19/85—Protective back sheets
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
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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
- C09J2475/00—Presence of polyurethane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2896—Adhesive compositions including nitrogen containing condensation polymer [e.g., polyurethane, polyisocyanate, etc.]
Definitions
- the present invention relates to an outdoor urethane adhesive. Furthermore, this invention relates to the solar cell backsheet obtained using the adhesive agent, and the solar cell module obtained using the solar cell backsheet.
- Outdoor materials such as barrier materials, roofing materials, solar cell panel materials, window materials, outdoor flooring materials, lighting protection materials, automobile members, and signboards are laminated materials in which a plurality of films are bonded with an adhesive.
- Examples of the film constituting the laminate include metal foils such as aluminum, copper, and steel plates, metal plates and metal vapor deposited films, plastic films such as polypropylene, polyvinyl chloride, polyester, fluororesin, and acrylic resin. .
- Solar cells are being put into practical use as useful energy resources.
- There are various types of solar cells and typical examples include silicon solar cells, compound solar cells, and organic solar cells.
- These solar cells are generally provided with a surface protective sheet on the side where sunlight enters for the purpose of protecting the surface.
- a back surface protection sheet (back sheet) is also provided on the surface opposite to the surface on which sunlight is incident for the purpose of protecting the solar cells.
- the back sheet 10 is a laminate of a plurality of films 11 and 12, and the films 11 and 12 are laminated via an adhesive 13.
- the back sheet 10 constitutes the solar cell module 1 together with the sealing material 20, the solar cells 30, and the glass plate 40 (see FIG. 3).
- the solar cell module 1 Since the solar cell module 1 is exposed outdoors for a long period of time, sufficient durability against high temperature, high humidity, and sunlight is required. In particular, when the performance of the adhesive 13 is low, the films 11 and 12 are peeled off, and the appearance of the back sheet 10 is impaired. For this reason, it is requested
- Patent Documents 1 to 3 disclose that a urethane-based adhesive is used for manufacturing a solar battery back sheet.
- Patent Document 1 discloses that a urethane adhesive for a solar battery back sheet is produced by reacting various polyols such as polyester polyol, acrylic polyol, and polycarbonate polyol with an isocyanate compound (Patent Document 1, paragraph numbers 0055 and 0056). Etc.).
- Patent Document 2 discloses an outdoor urethane-based adhesive using a specific polyester polyol and having improved durability (see Patent Document 2, Claims, Paragraph No. 0014, etc.). It is disclosed that by using a specific polyester polyol as an adhesive raw material, the hydrolysis resistance of a urethane adhesive is improved, and an adhesive effective for solar battery backsheet use can be obtained (Patent Document 2, paragraph Nos. 0070- 0072 etc.). Patent Document 3 discloses that an adhesive is prepared by blending an isocyanate curing agent with acrylic polyol (see Tables 1 and 2 of Patent Document 3), and that a solar cell backsheet is produced using these adhesives (Patent Document 3). 3 paragraph number 0107 etc.).
- Patent Documents 1 to 3 teach that the appearance of a solar cell module can be prevented by preparing a solar cell back sheet with an adhesive having excellent hydrolysis resistance and laminate strength.
- the durability performance required for the adhesive for solar battery backsheet is increasing year by year.
- the adhesives of Patent Documents 1 to 3 cannot be said to satisfy the extremely high level of required performance in recent years with respect to initial adhesion, adhesion after curing, and flexibility of the film after curing.
- a solar battery backsheet is produced with these adhesives, a plurality of films constituting the backsheet may be peeled off when the outdoor environment is severe.
- organic solar cells are being developed with lower production costs than solar cells using silicon or inorganic compound materials. Since the organic solar cell has a characteristic that it can be colored and flexible, a transparent film tends to be employed as a film constituting the solar cell backsheet. Therefore, the adhesive for solar battery back sheets is required not only to maintain the peel strength for a long period of time, but also to have a small color difference change even when exposed to ultraviolet rays for a long period of time and to be extremely excellent in weather resistance.
- the present invention has been made in order to solve such problems, and the problems are excellent in initial adhesiveness, adhesiveness after curing, and flexibility of the film after curing, preferably outdoor urethane bonding excellent in weather resistance. It is providing the solar cell module obtained using the agent, the solar cell backsheet obtained using the adhesive agent, and the solar cell backsheet.
- a urethane resin (A) obtained by reacting an isocyanate compound (a1) with a polyol (a2) having an ester bond,
- the isocyanate compound (a1) contains at least one selected from aliphatic isocyanates and alicyclic isocyanates,
- an outdoor urethane adhesive in which the polyol (a2) contains both a polyester polyol (a2-1) and an acrylic polyol (a2-2).
- the present invention provides:
- the acrylic polyol (a2-2) provides an outdoor urethane adhesive in which alkyl groups having a total of 4 or more carbon atoms are bonded to ester bonds.
- the polyester polyol (a2-1) is obtained by polycondensation of a dicarboxylic acid and a polyhydric alcohol, This polyhydric alcohol contains a branched aliphatic diol, and the branched side chain in one molecule of the branched aliphatic diol provides an outdoor urethane adhesive containing a total of 2 or more carbon atoms.
- the branched aliphatic diol described above provides an outdoor urethane adhesive that is at least one selected from 2-butyl-2-ethyl-1,3-propanediol and 2,4-diethyl-1,5-pentanediol To do.
- An outdoor urethane adhesive further comprising a hydroxyphenyliriazine compound is provided.
- the present invention provides a solar battery back sheet obtained by using the outdoor urethane adhesive.
- the present invention provides a solar cell module obtained by using the solar cell back sheet.
- the outdoor urethane adhesive according to the present invention is A urethane resin (A) obtained by reacting an isocyanate compound (a1) with a polyol (a2) having an ester bond,
- the isocyanate compound (a1) contains at least one selected from aliphatic isocyanates and alicyclic isocyanates,
- the polyol (a2) includes both components of the polyester polyol (a2-1) and the acrylic polyol (a2-2)
- the initial adhesiveness, the adhesiveness after curing, and the flexibility of the film after curing are improved, and these properties are excellent, making it suitable as an adhesive for solar cell backsheets.
- the outdoor urethane adhesive of the present invention is excellent in shear creep in the initial adhesion performance when the acrylic polyol (a2-2) has an alkyl group containing 4 or more carbon atoms in total combined with an ester bond. In the pressure cooker test for cured film properties, tack is difficult to develop.
- the polyester polyol (a2-1) is obtained by polycondensation of a dicarboxylic acid and a polyhydric alcohol, and the polyhydric alcohol contains a branched aliphatic diol, and the branched fat.
- the branched side chain in one molecule of the group diol contains 2 or more carbon atoms in total, the initial adhesive tack is excellent, and the cured film has excellent flexibility.
- the branched aliphatic diol is at least one selected from 2-butyl-2-ethyl-1,3-propanediol and 2,4-diethyl-1,5-pentanediol.
- it is excellent in tack in initial adhesion, excellent in flexibility of the cured film, and more suitable for solar cell backsheet applications.
- the outdoor urethane adhesive of the present invention further contains a hydroxyphenyltriazine-based compound, the change in color difference is reduced and the weather resistance is further improved, so that it is more suitable as an adhesive for solar cell backsheets.
- the solar cell backsheet according to the present invention is obtained using the above-mentioned outdoor urethane adhesive, even if it is exposed outdoors for a long period of time, the adhesive deteriorates, the film does not peel off, and the film does not discolor.
- an organic solar cell using an organic compound in a light absorption layer has been developed, and it is required that the organic solar cell has coloring and flexibility. Therefore, since the film which comprises the back sheet
- the outdoor urethane adhesive according to the present invention includes (A) a urethane resin obtained by reacting a specific isocyanate compound (a1) with a specific polyol (a2).
- Isocyanate compound (a1) contains at least 1 sort (s) selected from aliphatic isocyanate and alicyclic isocyanate, and it is preferable in particular that this invention contains aliphatic isocyanate.
- the “isocyanate compound (a1)” does not mean that it is composed only of an aliphatic isocyanate and an alicyclic isocyanate.
- the isocyanate compound (a1) contains an aromatic isocyanate. May be included.
- an isocyanate compound (a1) does not contain an ethylenic double bond (for example, ethylene group, butylene group, etc.) from a viewpoint of a weather resistance.
- isocyanates are classified into aliphatic isocyanates, alicyclic isocyanates, and aromatic isocyanates as described above.
- the isocyanate compound (a1) which is a constituent of the present invention, includes aliphatic isocyanates and alicyclic isocyanates. Since it contains at least 1 sort (s) selected from these, it is not comprised only with aromatic isocyanate.
- aliphatic isocyanate is a compound having a chain-like hydrocarbon chain in which an isocyanate group is directly bonded to the hydrocarbon chain, and having no cyclic hydrocarbon chain. Refers to a compound.
- the “aliphatic isocyanate” may have an aromatic ring, but the aromatic ring and the isocyanate group are not directly bonded. In the present specification, the aromatic ring is not included in the cyclic hydrocarbon chain.
- the “alicyclic isocyanate” is a compound that has a cyclic hydrocarbon chain and may have a chain hydrocarbon chain.
- the isocyanate group may be directly bonded to the cyclic hydrocarbon chain or may be directly bonded to the chain hydrocarbon chain that may be included.
- the “alicyclic isocyanate” may have an aromatic ring, but the aromatic ring and the isocyanate group are not directly bonded.
- Aromatic isocyanate refers to a compound having an aromatic ring and having an isocyanate group directly bonded to the aromatic ring. Therefore, even if an aromatic ring is present in the molecule, a compound in which the isocyanate group is not directly bonded to the aromatic ring is classified as an aliphatic isocyanate or an alicyclic isocyanate.
- 4,4′-diphenylmethane diisocyanate corresponds to an aromatic isocyanate because the isocyanate group is directly bonded to the aromatic ring.
- xylylene diisocyanate OCN—CH 2 —C 6 H 4 —CH 2 —NCO
- the aromatic ring may be condensed with two or more benzene rings.
- Examples of the aliphatic isocyanate include 1,4-diisocyanatobutane, 1,5-diisocyanatopentane, 1,6-diisocyanatohexane (hereinafter referred to as HDI), 1,6-diisocyanato-2,2,4.
- Examples include -trimethylhexane, methyl 2,6-diisocyanatohexanoate (lysine diisocyanate), 1,3-bis (isocyanatomethyl) benzene (xylylene diisocyanate), and the like.
- alicyclic isocyanate examples include 5-isocyanato-1-isocyanatomethyl-1,3,3-trimethylcyclohexane (isophorone diisocyanate), 1,3-bis (isocyanatomethyl) cyclohexane (hydrogenated xylylene diisocyanate).
- Bis (4-isocyanatocyclohexyl) methane hydrochloride
- 1,4-diisocyanatocyclohexane examples include 5-isocyanato-1-isocyanatomethyl-1,3,3-trimethylcyclohexane (isophorone diisocyanate), 1,3-bis (isocyanatomethyl) cyclohexane (hydrogenated xylylene diisocyanate).
- Bis (4-isocyanatocyclohexyl) methane hydrochloride
- 1,4-diisocyanatocyclohexane 1,4-diisocyanatocyclohex
- the isocyanate compound (a1) may contain an aromatic isocyanate as long as the urethane adhesive targeted by the present invention can be obtained.
- aromatic isocyanates include 4,4′-diphenylmethane diisocyanate, p-phenylene diisocyanate, m-phenylene diisocyanate, and the like. These isocyanate compounds can be used alone or in combination.
- HDI, isophorone diisocyanate, and xylylene diisocyanate are preferable, and an HDI trimer, an isophorone diisocyanate trimer, and a xylylene diisocyanate monomer are particularly preferable.
- the polyol (a2) having an ester bond includes both a polyester polyol and an acrylic polyol.
- the polyol (a2) which has an ester bond does not contain an ethylenic double bond from a weather-resistant viewpoint.
- the “polyester polyol” refers to a “main chain type” polyester and a compound having an ester bond and a hydroxyl group in the “main chain”. This hydroxyl group is usually located at the end of the main chain and acts as a functional group that reacts with an isocyanate group.
- the polyester polyol is generally obtained by a condensation polymerization reaction between a polyhydric alcohol and a dicarboxylic acid and its anhydride.
- dicarboxylic acids include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, 2-methylsuccinic acid, 2-methyladipic acid 3-methyladipic acid, 3-methylpentanedioic acid, 2-methyloctanedioic acid, 3,8-dimethyldecanedioic acid, 3,7-dimethyldecanedioic acid, phthalic acid, terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid Examples include acids, trimellitic acid, trimesic acid, cyclohexanedicarboxylic acid and the like. These are used alone or in combination. Examples of
- the polyhydric alcohol preferably has 1 to 3 functional groups, and particularly preferably contains a bifunctional polyol, so-called diol.
- diol include linear aliphatic diols such as ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol, and decanediol; 2-butyl-2-ethyl-1,3-propanediol, 2,4-diethyl-1,5-pentanediol, 2,2-dimethyl-1,3-propanediol, 3,3-dimethyl-1,5 -Pentanediol, 2-methyl-2-ethyl-1,3-propanediol, 3-methyl-3-ethyl-1,5-pentanediol, 2-methyl-2-propyl
- the polyhydric alcohol preferably contains a branched aliphatic diol, and the branched side chains in one molecule of the branched aliphatic diol preferably contain 2 or more carbon atoms in total.
- Branched aliphatic diols whose branched side chains in one molecule contain a total of 2 or more carbon atoms are 2-butyl-2-ethyl-1,3-propanediol and 2,4-diethyl-1,5. -Preferably at least one selected from pentanediol.
- acrylic polyol refers to a compound obtained by addition polymerization reaction of (meth) acrylate having a hydroxyl group, and has an ester bond in the “side chain”.
- the “acrylic polyol” may be a homopolymer of (meth) acrylate having a hydroxyl group or a copolymer with “other polymerizable monomer”. The hydroxyl group of the acrylic polyol reacts with the isocyanate group.
- Examples of the “(meth) acrylate having a hydroxyl group” include, for example, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, glycerin mono (meth) acrylate, 4-hydroxy A butyl acrylate etc. can be illustrated.
- “Other polymerizable monomers” are “radical polymerizable monomers having an ethylenic double bond” other than “(meth) acrylate having a hydroxyl group”. Specifically, (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dicyclopentanyl (meth) Examples include acrylate, isobornyl (meth) acrylate, styrene, vinyltoluene and the like.
- the acrylic polyol preferably has an alkyl group containing 4 or more carbon atoms in total bonded to an ester bond.
- the ratio of the ester bond to which the alkyl group having 4 or more carbon atoms is bonded is preferably 50% or more of the ester bond of the acrylic polyol.
- the outdoor urethane adhesive is excellent in shear creep in the initial adhesive performance and pressure cooker in cured film characteristics. Tack is difficult to develop in the test.
- the chemical structure of the alkyl group bonded to the ester bond of the acrylic polyol is based on “(meth) acrylate having a hydroxyl group” and “other polymerizable monomer” which are “raw material monomers” of the acrylic polymer. That is, in the present invention, it is preferable that 50 parts by weight or more of monomers in which alkyl groups containing 4 or more carbon atoms in total are bonded to ester bonds per 100 parts by weight of “raw monomer” of the acrylic polymer.
- the outdoor urethane adhesive is more excellent in shear creep in the initial adhesion performance and cured film. In the pressure cooker test in characteristics, tack is difficult to develop.
- the polyol (a2) having an ester bond may contain a polyether polyol as long as the outdoor urethane adhesive targeted by the present invention can be obtained.
- the polyether polyol include polyoxytetramethylene glycol (PTMG), polyoxypropylene glycol (PPG), and polyoxyethylene glycol (PEG).
- the (A) urethane resin according to the present invention can be obtained by reacting an isocyanate compound (a1) with a polyol (a2) having an ester bond.
- the reaction can be performed by a known method, and can be usually performed by mixing the isocyanate compound (a1) and the polyol (a2) having an ester bond.
- the mixing method is not particularly limited as long as the (A) urethane resin according to the present invention can be obtained.
- (B) hydroxyphenyl triazine-based compound is a kind of triazine derivative, which is a compound in which a hydroxyphenyl derivative is bonded to a carbon atom of the triazine derivative, and is generally a hydroxyphenyl triazine-based compound.
- the outdoor urethane adhesive targeted by the present invention it is not particularly limited.
- Examples of such (B) hydroxyphenyltriazine compounds include compounds represented by the following formulas (1) to (5) and isomers thereof, which are preferred, but are not limited thereto. There is no.
- (B) hydroxyphenyltriazine compound a commercially available product can be used.
- it is commercially available from BASF Corporation as Tinuvin 400, Tinuvin 405, Tinuvin 479, Tinuvin 477, Tinuvin 460 (all trade names), and the like.
- Tinuvin 479 trade name
- (B) Hydroxyphenyltriazine compounds can be used alone or in combination.
- the (B) hydroxyphenyltriazine compounds of the chemical formulas (1) to (5) are generally used as ultraviolet absorbers, and as long as the outdoor urethane adhesive targeted by the present invention can be obtained, A UV absorber can be used in combination.
- examples of “other ultraviolet absorbers” include benzotriazole compounds, oxalic acid anilide compounds, malonic acid ester compounds, and the like, and commercially available products can be used.
- the outdoor urethane adhesive of the present invention preferably further contains (C) a silane compound in addition to the component (A) and the component (B).
- a silane compound for example, (meth) acryloxyalkyltrialkoxysilanes, (meth) acryloxyalkylalkylalkoxysilanes, vinyltrialkoxysilanes, vinylalkylalkoxysilanes, epoxysilanes Mercaptosilanes and isocyanurate silanes can be used, but are not limited to these silane compounds.
- (Meth) acryloxyalkyltrialkoxysilanes include, for example, 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxypropyltriethoxysilane, 4- (meth) acryloxyethyltrimethoxy A silane etc. can be illustrated.
- (Meth) acryloxyalkylalkylalkoxysilanes include, for example, 3- (meth) acryloxypropylmethyldimethoxysilane, 3- (meth) acryloxypropylmethyldiethoxysilane, 3- (meth) acryloxypropylethyl Examples include diethoxysilane and 3- (meth) acryloxyethylmethyldimethoxysilane.
- Examples of the “vinyl trialkoxysilanes” include vinyltrimethoxysilane, vinyltriethoxysilane, vinyldimethoxyethoxysilane, vinyltri (methoxyethoxy) silane, vinyltri (ethoxymethoxy) silane and the like.
- Examples of “vinylalkylalkoxysilanes” include vinylmethyldimethoxysilane, vinylethyldi (methoxyethoxy) silane, vinyldimethylmethoxysilane, vinyldiethyl (methoxyethoxy) silane, and the like.
- Epoxysilanes can be classified into, for example, glycidyl silanes and epoxycyclohexyl silanes.
- the “glycidyl silane” has a glycidoxy group, and specifically includes, for example, 3-glycidoxypropylmethyldiisopropenoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyl. Examples include triethoxysilane and 3-glycidoxypropyldiethoxysilane.
- the “epoxycyclohexyl silane” has a 3,4-epoxycyclohexyl group, and specifically includes, for example, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxy (Cyclohexyl) ethyltriethoxysilane and the like.
- Examples of “mercaptosilanes” include 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, and the like.
- Examples of “isocyanurate silanes” include tris (3- (trimethoxysilyl) propyl) isocyanurate.
- These (C) silane compounds can improve the weather resistance of the adhesive containing (B) hydroxyphenyltriazine in addition to improving the peel strength. In the present invention, it is particularly preferable to add epoxy silanes because the performance of the outdoor urethane adhesive is remarkably improved.
- the outdoor urethane adhesive of the present invention preferably further contains at least one selected from (D) a hindered phenol compound and (E) a hindered amine compound.
- the “(D) hindered phenol compound” is generally regarded as a hindered phenol compound, and is not particularly limited as long as the outdoor urethane adhesive targeted by the present invention can be obtained.
- a commercially available hindered phenol compound can be used.
- As a hindered phenol-type compound brand name IRGANOX1010, IRGANOX1035, IRGANOX1076, IRGANOX1135, IRGANOX1330 (all are brand names), etc. can be used, for example.
- the hindered phenol compound is added to the adhesive as an antioxidant, and may be used in combination with, for example, a phosphite antioxidant, a thioether antioxidant, an amine antioxidant, or the like.
- the “(E) hindered amine compound” is generally regarded as a hindered amine compound, and is not particularly limited as long as the outdoor urethane adhesive targeted by the present invention can be obtained.
- a commercially available hindered amine compound can be used.
- As a hindered amine compound for example, tinuvin 765, tinuvin 111FDL, tinuvin 123, tinuvin 144, tinuvin 152, tinuvin 292, and tinuvin 5100 (all trade names) can be used.
- the hindered amine compound is added to the adhesive as a light stabilizer and can be used in combination with, for example, a benzotriazole light stabilizer, a benzoate light stabilizer, a benzotriazole light stabilizer, or the like.
- the outdoor urethane adhesive according to the present invention can further contain other components as long as the desired outdoor urethane adhesive can be obtained.
- the time when the “other components” are added to the outdoor urethane adhesive is not particularly limited as long as the desired outdoor urethane resin is obtained.
- Other components may be added together with the isocyanate compound (a1) and the polyol (a2), for example, when the (A) urethane resin is synthesized. First, the isocyanate compound (a1) and the polyol (a2) are added. And (A) after synthesizing the urethane resin, (B) the hydroxyphenyltriazine compound may be added together.
- examples of the “other components” include tackifier resins, pigments, plasticizers, flame retardants, catalysts, and waxes.
- examples of the “tackifying resin” include styrene resins, terpene resins, aliphatic petroleum resins, aromatic petroleum resins, rosin esters, acrylic resins, and polyester resins (excluding polyester polyols).
- examples of the “pigment” include titanium oxide and carbon black.
- plasticizer examples include dioctyl phthalate, dibutyl phthalate, diisononyl adipate, dioctyl adipate, mineral spirit, and the like.
- flame retardant examples include halogen flame retardants, phosphorus flame retardants, antimony flame retardants, metal hydroxide flame retardants, and the like.
- Catalysts include metal catalysts such as tin catalysts (trimethyltin laurate, trimethyltin hydroxide, dibutyltin dilaurate, dibutyltin maleate, etc.), lead catalysts (lead oleate, lead naphthenate, lead octenoate, etc.) ), Other metal catalysts (such as naphthenic acid metal salts such as cobalt naphthenate), and amine-based catalysts such as triethylenediamine, tetramethylethylenediamine, tetramethylhexylenediamine, diazabicycloalkenes, dialkylaminoalkylamines, etc. Can be illustrated.
- wax such as paraffin wax and microcrystalline wax is preferable.
- the outdoor urethane adhesive of the present invention is produced by mixing the above-described components (A) and (B), and optionally added components (C), (D), (E) and other components. be able to.
- the mixing method is not particularly limited as long as the outdoor urethane adhesive targeted by the present invention can be obtained.
- the order of mixing the components is not particularly limited.
- the outdoor urethane adhesive according to the present invention can be produced without requiring a special mixing method and a special mixing order. And the obtained outdoor urethane adhesive is excellent in both adhesive strength and weather resistance.
- outdoor material application such as a barrier material, a roof material, a solar cell module, a window material, an outdoor flooring material, a lighting protection material, an automobile member, and a signboard.
- outdoor materials include a laminate in which a plurality of films are bonded together.
- the film include a film in which metal is vapor-deposited on a plastic substrate (metal vapor-deposited film) and a film in which metal is not vapor-deposited (plastic film).
- the adhesives for manufacturing solar cell modules are required to have particularly high levels of strength and weather resistance. Since the outdoor urethane adhesive of the present invention is excellent in both peel strength and weather resistance, it is suitable as an adhesive for solar battery backsheets.
- the outdoor urethane adhesive of the present invention is applied to a film.
- a coating method it can be performed by various methods such as gravure coating, wire bar coating, air knife coating, die coating, lip coating, and comma coating.
- a plurality of films coated with the outdoor urethane adhesive of the present invention are bonded together to complete a solar battery back sheet.
- FIG. 1 is a cross-sectional view of the solar cell backsheet of the present invention.
- the solar battery back sheet 10 is formed of two films and an outdoor urethane adhesive 13 therebetween, and the two films 11 and 12 are bonded together by the outdoor urethane adhesive 13.
- the films 11 and 12 may be the same material or different materials. In FIG. 1, two films 11 and 12 are bonded together, but three or more films may be bonded together.
- FIG. 2 shows another embodiment of the solar battery back sheet according to the present invention.
- a foil film 11 a is formed between the film 11 and the outdoor urethane adhesive 13.
- the film 11 is a plastic film
- the form in which the metal thin film 11a is formed on the surface of the film 11 is shown.
- the metal thin film 11a can be formed on the surface of the plastic film 11, for example, by vapor deposition.
- the film 11 and the film 12 on which the metal thin film 11a is formed are attached via an outdoor urethane adhesive 13, 2 can be obtained.
- Examples of the metal deposited on the plastic film include aluminum, steel and copper. By subjecting the plastic film to vapor deposition, barrier properties can be imparted to the film. As the vapor deposition material, silicon oxide or aluminum oxide is used.
- the base plastic film 11 may be transparent, or may be colored white or black.
- a plastic film made of polyvinyl chloride, polyester, fluororesin, or acrylic resin is used, but a polyethylene terephthalate film or a polybutylene terephthalate film is used to impart heat resistance, weather resistance, rigidity, insulation, and the like. It is particularly preferred.
- the films 11 and 12 may be transparent or colored. The deposited thin film 11a and the film 12 of the film 11 are attached using the outdoor urethane adhesive 13 of the present invention, and the films 11 and 12 are often laminated by a dry laminating method.
- FIG. 3 shows a cross-sectional view of an example of the solar cell module of the present invention.
- the solar cell module 1 of the present invention generates a desired voltage by connecting a glass plate 40, a sealing material 20 such as ethylene vinyl acetate resin (EVA), generally a plurality of solar cells 30, These members 10, 20, 30 and 40 can be obtained by overlapping the back sheet 10 and fixing them with the spacer 50.
- EVA ethylene vinyl acetate resin
- the back sheet 10 is a laminate of a plurality of films 11 and 12, even if the back sheet 10 is exposed to the outdoors for a long period of time, the films 11 and 12 do not peel off. Is required.
- the solar electronic cell 30 is often manufactured using silicon, but may be manufactured using an organic resin containing a pigment.
- the solar cell module 1 is an organic (dye-sensitized) solar cell module. Since organic (pigment-sensitized) solar cells are required to be colored, transparent films are often used as the films 11 and 12 constituting the solar cell backsheet 10. Therefore, the solar cell backsheet adhesive 13 is required to have extremely small color difference change and excellent weather resistance even when exposed outdoors for a long period of time.
- a urethane resin (A) obtained by reacting an isocyanate compound (a1) with a polyol (a2) having an ester bond,
- the isocyanate compound (a1) contains at least one selected from aliphatic isocyanate and alicyclic isocyanate
- Polyol (a2) is an outdoor urethane adhesive containing both polyester polyol (a2-1) and acrylic polyol (a2-2).
- the polyester polyol (a2-1) is obtained by polycondensation of a dicarboxylic acid and a polyhydric alcohol, 3.
- Aliphatic isocyanate and alicyclic isocyanate (a1-1) Aliphatic isocyanate: 1,6-diisocyanatohexane (HDI) trimer (isocyanurate) ⁇ Sumidule N3300 manufactured by Sumika Bayer Urethane Co., Ltd.
- Polyester polyol (a2-1-1) ⁇ Polyester polyol obtained using 2-butyl-2-ethyl-1,3-propanediol as a polyhydric alcohol> What was synthesize
- (A2-1-2) ⁇ Polyester polyol obtained using 2,4-dibutyl-1,5-pentanediol as the polyhydric alcohol> HS 2N-226P (trade name) manufactured by Toyokuni Oil Co., Ltd .: Polyester polyol comprising phthalic anhydride and 2,4-dibutyl-1,5-pentanediol
- Acrylic polyol (a2-2-1) Isacrylyl H270 (trade name) manufactured by Estrone Chemical Co., Ltd .: obtained from methyl methacrylate, butyl acrylate, butyl methacrylate, 2-hydroxyethyl methacrylate, butyl acrylate and butyl methacrylate ( Acrylic polyol having a total content of 4) of alkyl groups bonded to ester bonds of 70% by weight
- MMA Methyl methacrylate
- BA Butyl acrylate
- CHMA Cyclohexyl methacrylate
- BA Butyl methacrylate
- GMA Glycidyl methacrylate
- HEMA 2-hydroxyethyl methacrylate
- HEMA 2-hydroxyethyl methacrylate
- B Hydroxyphenyltriazine compound (B-1) Tinuvin 479 (trade name) manufactured by BASF: 2- [4- (octyl-2-methylethanoate) oxy-2-hydroxyphenyl] -4,6- [Bis (2,4-dimethylphenyl)]-1,3,5-triazine
- B ′ Other ultraviolet absorbers (B′-1) Tinuvin 234 (trade name) manufactured by BASF: 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl] -2H -Benzotriazole
- C Silane compound (C-1) Silaace S530 (trade name) manufactured by Chisso Corporation: 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane
- the outdoor urethane adhesives of Examples 1 to 9 and Comparative Examples 1 to 6 below were produced using the above components, and the performance of the obtained outdoor urethane adhesives was evaluated. A manufacturing method and an evaluation method are shown below.
- Example 1 Manufacture of outdoor urethane adhesive> As shown in Table 1, (a1-1) 8.23 g of Sumidur N3300 (trade name) manufactured by Sumika Bayer Urethane Co., Ltd., 22.38 g of polyester polyol (a2-1-1), (B′-1) 1.46 g of Tinuvin 234 (trade name) manufactured by BASF (C-1) 0.68g of Chisso Ace S530 (trade name) (D-1) 0.19 g of Irganox 1330 (trade name) manufactured by BASF (E-1) 0.19 g of Tinuvin 765 (trade name) manufactured by BASF Were weighed and mixed, and then ethyl acetate was added to these mixtures to prepare a 30% solids solution. This preparation solution was used as an outdoor urethane adhesive, and the following tests were conducted.
- the outdoor urethane adhesive of Example 1 was applied to a transparent polyethylene terephthalate (PET) sheet (O300EW36 (trade name) manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) so that the solid weight would be 10 g / m 2. Dry at 10 ° C. for 10 minutes. Thereafter, the surface of the PET sheet adhesive-coated surface was covered with a surface-treated transparent polyolefin film (Linear Low Density Polyethylene Film LL-XUMN # 30 (trade name) manufactured by Futamura Chemical Co., Ltd.), and a flat press machine ( Both films were pressed with ASF-5 (trade name) manufactured by Shindo Metal Industry Co., Ltd. at a pressing pressure of 1.0 MPa at 50 ° C. for 30 minutes. Thereafter, the obtained film laminate was cut into a width of 15 mm and a length of 95 mm to obtain a sample for confirming shear creep.
- PET polyethylene terephthalate
- the surface of the PET sheet adhesive-coated surface was covered with a surface-treated transparent polyolefin film (Linear Low Density Polyethylene Film LL-XUMN # 30 (trade name) manufactured by Futamura Chemical Co., Ltd.), and a flat press machine ( Both films were pressed with ASF-5 (trade name) manufactured by Shindo Metal Industry Co., Ltd. at a pressing pressure of 1.0 MPa at 50 ° C. for 30 minutes. Thereafter, the film was cured at 40 ° C. for 1 week, and the obtained film laminate was cut into a width of 15 mm to be a cured adhesive performance confirmation sample, and a 25 mm square cut was taken as a yellowing degree confirmation sample.
- a surface-treated transparent polyolefin film Linear Low Density Polyethylene Film LL-XUMN # 30 (trade name) manufactured by Futamura Chemical Co., Ltd.
- ASF-5 trade name
- Shindo Metal Industry Co., Ltd. at a pressing pressure of 1.0 MPa at 50
- ⁇ Preparation of cured film characteristics confirmation sample >> The outdoor urethane adhesive of Example 1 was poured into a polyethylene cup so as to have a thickness of 3.3 mm, and was cured as it was at room temperature for 1 day, followed by a week at 40 ° C. to obtain a cured film having a thickness of 1 mm. Then, it was cut into 5 mm width and 30 mm length to obtain a cured film characteristic confirmation sample.
- Adhesion performance after curing >> Using the tensile strength tester (Tensilon RTM-250 (trade name) manufactured by Orientec Co., Ltd.), the film laminate (15 mm width) was subjected to a peel test at a room temperature of 100 mm / min and a tensile speed of 180 °. It was.
- the evaluation criteria are as follows. A: Peel strength is 9 N / 15 mm or more B: Peel strength is 6 N / 15 mm or more and less than 9 N / 15 mm X: Peel strength is less than 6 N / 15 mm
- Example 2 to 9 and Comparative Examples 1 to 6 the components were blended in the compositions described in Tables 1 to 4, and an outdoor urethane adhesive was produced in the same manner as in Example 1. Production and evaluation methods of the film laminate 1 and the film laminate 2 were also performed in the same manner as in Example 1.
- the adhesives of Examples 1 to 9 include (a1) and (a2) which are constituent elements of the present application, initial (before curing) adhesiveness, post-curing adhesiveness, and curing Excellent overall balance of film properties. Therefore, it was proved that the adhesives of Examples 1 to 9 are suitable as an outdoor urethane adhesive, and particularly suitable as a solar cell backsheet adhesive.
- the adhesives of Examples 2 to 9 contain a hydroxyphenyltriazine-based ultraviolet absorber, the yellowing degree is ⁇ , the weather resistance is remarkably improved, and the organic type (dye sensitization) It is extremely useful as a back sheet adhesive for solar cells.
- the adhesives of Comparative Examples 1 to 6 do not include either (a1) or (a2), which is a constituent requirement of the present application.
- the adhesiveness, cured film characteristics, and yellowing degree are inferior. Therefore, the adhesive of the comparative example is not preferable as an outdoor urethane adhesive, and cannot be used for a solar battery back sheet that is exposed outdoors for a long period of time.
- the (a2) polyol contains both polyester polyol and acrylic polyol components, thereby improving the initial (before curing) adhesiveness, post-curing adhesiveness, and cured film properties of the urethane adhesive. It was.
- the present invention provides an outdoor urethane adhesive.
- the outdoor urethane adhesive according to the present invention is used for outdoor materials such as barrier materials, roofing materials, solar cell modules, window materials, outdoor flooring materials, lighting protection materials, automobile members, signboards, etc., and particularly solar cell backsheets. Suitable for manufacturing.
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Abstract
Description
特許文献1は、ポリエステルポリオール、アクリルポリオール、ポリカーボネートポリオール等の各種ポリオールとイソシアネート化合物とを反応させ、太陽電池バックシート用ウレタン系接着剤を製造することを開示する(特許文献1段落番号0055、0056等参照)。
特許文献3は、アクリルポリオールにイソシアネート硬化剤を配合して接着剤を製造し(特許文献3表1、表2参照)、これら接着剤で太陽電池バックシートを作製する旨を開示する(特許文献3段落番号0107等参照)。
イソシアネート化合物(a1)とエステル結合を有するポリオール(a2)が反応して得られるウレタン樹脂(A)を含み、
イソシアネート化合物(a1)が脂肪族イソシアネート及び脂環式イソシアネートから選択される少なくとも1種を含み、
ポリオール(a2)がポリエステルポリオール(a2-1)とアクリルポリオール(a2-2)の両方を含む屋外用ウレタン接着剤を提供する。
アクリルポリオール(a2-2)は、合計で4以上の炭素原子を含むアルキル基がエステル結合と結合している屋外用ウレタン接着剤を提供する。
本発明は、別の態様において、ポリエステルポリオール(a2-1)がジカルボン酸と多価アルコールの重縮合により得られ、
この多価アルコールは、分岐状脂肪族ジオールを含み、その分岐状脂肪族ジオールの1分子中の分岐した側鎖は、合計で2以上の炭素原子を含む屋外用ウレタン接着剤を提供する。
上述の分岐脂肪族ジオールは、2-ブチル-2-エチル-1,3-プロパンジオール及び2,4-ジエチル-1,5-ペンタンジオールから選ばれる少なくとも1種である屋外用ウレタン接着剤を提供する。
本発明は、更に好ましい態様として、
ヒドロキシフェニリトリアジン系化合物を更に含む屋外用ウレタン接着剤を提供する。
本発明は、好ましい要旨において、上記太陽電池バックシートを用いて得られる太陽電池モジュールを提供する。
イソシアネート化合物(a1)とエステル結合を有するポリオール(a2)が反応して得られるウレタン樹脂(A)を含み、
イソシアネート化合物(a1)が脂肪族イソシアネート及び脂環式イソシアネートから選択される少なくとも1種を含み、
ポリオール(a2)がポリエステルポリオール(a2-1)とアクリルポリオール(a2-2)の両成分を含むことによって、
初期接着性、硬化後の接着性及び硬化後の皮膜の柔軟性が向上し、これらの特性に優れ、太陽電池バックシート用接着剤として好適である。
本発明に係る屋外用ウレタン接着剤は、ポリエステルポリオール(a2-1)がジカルボン酸と多価アルコールの重縮合により得られ、この多価アルコールが、分岐状脂肪族ジオールを含み、その分岐状脂肪族ジオールの1分子中の分岐した側鎖は、合計で2以上の炭素原子を含む場合、初期接着性のタックに優れ、硬化皮膜の特性において、柔軟性に優れる。
本発明の屋外用ウレタン接着剤は、ヒドロキシフェニルトリアジン系化合物を更に含む場合、色差変化が少なくなり、耐候性がより向上するので、太陽電池バックシート用接着剤として更により適する。
近年、光吸収層に有機化合物を用いた有機系太陽電池が開発されており、有機系太陽電池に着色性や柔軟性を持たせることが要求されている。従って、有機系太陽電池のバックシートを構成するフィルムが透明化する傾向があるので、色差変化が小さく、柔軟性のある本発明の太陽電池バックシートは、かかる点からも有用である。
本発明に係る太陽電池モジュールは、上記太陽電池バックシートを用いて得られるので、外観に優れ、更に耐久性能にも優れる。
イソシアネート化合物(a1)は、脂肪族イソシアネート及び脂環式イソシアネートから選択される少なくとも1種を含み、特に、本発明では、脂肪族イソシアネートを含むことが好ましい。
尚、本明細書では、芳香環は環状の炭化水素鎖に含まれない。
尚、芳香環は、二つ以上のベンゼン環が縮環していてもよい。
これらのイソシアネート化合物は、単独で又は組み合わせて使用することができる。特に、HDI、イソホロンジイソシアネート及びキシリレンジイソシアネートが好ましく、特に、HDIの3量体、イソホロンジイソシアネートの3量体及びキシリレンジイソシアネートの単量体が好ましい。
本発明において「ポリエステルポリオール」とは、「主鎖型」ポリエステルであって、「主鎖」にエステル結合と水酸基を有する化合物をいう。この水酸基は、主鎖の末端に通常位置し、イソシアネート基と反応する官能基として作用する。
そのようなジカルボン酸として、例えば、シュウ酸、マロン酸、コハク酸、グルタル酸、アジピン酸、ピメリン酸、スベリン酸、アゼライン酸、セバシン酸、ドデカン二酸、2-メチルコハク酸、2-メチルアジピン酸、3-メチルアジピン酸、3-メチルペンタン二酸、2-メチルオクタン二酸、3,8-ジメチルデカン二酸、3,7-ジメチルデカン二酸、フタル酸、テレフタル酸、イソフタル酸、ナフタレンジカルボン酸、トリメリト酸、トリメシン酸、シクロヘキサンジカルボン酸等が例示される。これらは、単独又は組み合わせて使用される。
カルボン酸無水物として、例えば、無水酢酸、無水プロピオン酸、無水コハク酸、無水マレイン酸、無水フタル酸が挙げられる。これらは、単独で用いても、複数種類を用いても良い。
ジオールとして、例えば、エチレングリコール、プロピレングリコール、ブタンジオール、ペンタンジオール、ヘキサンジオール、ヘプタンジオール、オクタンジオール、ノナンジオール、デカンジオール等の直鎖状脂肪族ジオール;
2-ブチル-2-エチル-1,3-プロパンジオール、2,4-ジエチル-1,5-ペンタンジオール、2,2-ジメチル-1,3-プロパンジオール、3,3-ジメチル-1,5-ペンタンジオール、2-メチル-2-エチル-1,3-プロパンジオール、3-メチル-3-エチル-1,5-ペンタンジオール、2-メチル-2-プロピル-1,3-プロパンジオール、3-メチル-3-プロピル-1,5-ペンタンジオール、2-メチル-2-ブチル-1,3-プロパンジオール、3-メチル-3-ブチル1,5-ペンタンジオール、2,2-ジエチル-1,3-プロパンジオール、3,3-ジエチル-1,5-ペンタンジオール、2-エチル-2-ブチル-1,3-プロパンジオール、3-エチル-3-ブチル-1,5-ペンタンジオール、2-エチル-2-プロピル-1,3-プロパンジオール、3-エチル-3-プロピル-1,5-ペンタンジオール、2,2-ジブチル-1,3-プロパンジオール、3,3-ジブチル-1,5-ペンタンジオール、2,2-ジプロピル-1,3-プロパンジオール、3,3-ジプロピル-1,5-ペンタンジオール、2-ブチル-2-プロピル-1,3-プロパンジオール、3-ブチル-3-プロピル-1,5-ペンタンジオール、2-エチル-1,3-プロパンジオール、2-プロピル-1,3-プロパンジオール、2-ブチル-1,3-プロパンジオール、3-エチル-1,5-ペンタンジオール、3-プロピル-1,5-ペンタンジオール、3-ブチル-1,5-ペンタンジオール、3-オクチル-1,5-ペンタンジオール、3-ミリスチル-1,5-ペンタンジオール、3-ステアリル-1,5-ペンタンジオール、2-エチル-1,6-ヘキサンジオール、2-プロピル-1,6-ヘキサンジオール、2-ブチル-1,6-ヘキサンジオール、5-エチル-1,9-ノナンジオール、5-プロピル-1,9-ノナンジオール、5-ブチル-1,9-ノナンジオール等の分岐脂肪族ジオール;
等を例示できる。
本発明では、多価アルコールは、分岐状脂肪族ジオールを含み、その分岐状脂肪族ジオールの1分子中の分岐した側鎖は、合計で2以上の炭素原子を含むことが好ましい。
1分子中の分岐した側鎖が、合計で2以上の炭素原子を含む分岐状脂肪族ジオールは、2-ブチル-2-エチル-1,3-プロパンジオール及び2,4-ジエチル-1,5-ペンタンジオールから選らばれる少なくとも1種であることが好ましい。
上述の分岐脂肪族ジオールを用いることによって、本発明の屋外用ウレタン接着剤は硬化皮膜の特性において、柔軟性により優れる。
「アクリルポリオール」は、水酸基を有する(メタ)アクリレートの単独重合体でも、「その他の重合性単量体」との共重合体であってもよい。アクリルポリオールの水酸基がイソシアネート基と反応する。
すなわち、本発明では、アクリルポリマーの“原料モノマー”100重量部当たり、合計で4以上の炭素原子を含むアルキル基がエステル結合と結合しているモノマーは50重量部以上含まれることが好ましい。合計で4以上の炭素原子を含むアルキル基がエステル結合と結合しているモノマーが50重量部以上含まれる場合、屋外用ウレタン接着剤は、よりいっそう、初期接着性能におけるせん断クリープに優れ、硬化皮膜特性におけるプレッシャークッカー試験でタックが発現し難くなる。
化学式(1)~(5)の(B)ヒドロキシフェニルトリアジン系化合物は、一般に、紫外線吸収剤として使用されており、本発明が目的とする屋外用ウレタン接着剤を得ることができる限り、他の紫外線吸収剤を組み合わせて使用することができる。「他の紫外線吸収剤」として、例えば、ベンゾトリアゾール系化合物、シュウ酸アニリド系化合物、マロン酸エステル系化合物等を例示することができ、市販されているものを使用することができる。
本発明では、(C)シラン化合物として、例えば、(メタ)アクリロキシアルキルトリアルコキシシラン類、(メタ)アクリロキシアルキルアルキルアルコキシシラン類、ビニルトリアルコキシシラン類、ビニルアルキルアルコキシシラン類、エポキシシラン類、メルカプトシラン類及びイソシアヌレートシラン類を用いることができるが、これらのシラン化合物のみに限定されることはない。
「(メタ)アクリロキシアルキルアルキルアルコキシシラン類」として、例えば、3-(メタ)アクリロキシプロピルメチルジメトキシシラン、3-(メタ)アクリロキシプロピルメチルジエトキシシラン、3-(メタ)アクリロキシプロピルエチルジエトキシシラン、3-(メタ)アクリロキシエチルメチルジメトキシシラン等を例示できる。
「ビニルアルキルアルコキシシラン類」として、例えば、ビニルメチルジメトキシシラン、ビニルエチルジ(メトキシエトキシ)シラン、ビニルジメチルメトキシシラン、ビニルジエチル(メトキシエトキシ)シラン等を例示できる。
「エポキシシクロヘキシル系シラン」は、3,4-エポキシシクロヘキシル基を有するもので、具体的には、例えば、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、2-(3,4-エポキシシクロヘキシル)エチルトリエトキシシラン等を例示できる。
「イソシアヌレートシラン類」として、例えば、トリス(3-(トリメトキシシリル)プロピル)イソシアヌレート等を例示できる。
これら(C)シラン化合物は、剥離強度を向上させることに加え、(B)ヒドロキシフェニルトリアジンが含まれた接着剤の耐候性を向上させることができる。本発明では、特に、エポキシシラン類を添加すると、屋外用ウレタン接着剤の性能が著しく向上するので好ましい。
「(D)ヒンダードフェノール系化合物」とは、一般にヒンダードフェノール系化合物とされるものであり、本発明が目的とする屋外用ウレタン接着剤を得られる限り、特に制限されるものではない。
(E)ヒンダードアミン系化合物は、市販されているものを使用することができる。(E)ヒンダードアミン系化合物として、例えば、チヌビン765、チヌビン111FDL、チヌビン123、チヌビン144、チヌビン152、チヌビン292及びチヌビン5100(いずれも商品名)等を使用することができる。ヒンダードアミン系化合物は、光安定剤として接着剤に添加され、例えば、ベンゾトリアゾール系光安定剤、ベンゾエート系光安定剤、ベンゾトリアゾール系光安定剤等と組み合わせて使用することができる。
「その他の成分」を、屋外用ウレタン接着剤に添加する時期は、目的とする屋外用ウレタン樹脂が得られる限り、特に制限されるものではない。その他の成分は、例えば、(A)ウレタン樹脂を合成する際に、イソシアネート化合物(a1)及びポリオール(a2)と一緒に添加しても良く、また、まずイソシアネート化合物(a1)とポリオール(a2)とを反応させて(A)ウレタン樹脂を合成した後、(B)ヒドロキシフェニルトリアジン系化合物を加えるときに、一緒に添加してもよい。
「粘着付与樹脂」として、例えば、スチレン系樹脂、テルペン系樹脂、脂肪族石油樹脂、芳香族石油樹脂、ロジンエステル、アクリル樹脂及びポリエステル樹脂(ポリエステルポリオールを除く)等を例示できる。
「顔料」として、例えば、酸化チタン及びカーボンブラック等を例示できる。
「難燃剤」として、例えば、ハロゲン系難燃剤、リン系難燃剤、アンチモン系難燃剤及び、金属水酸化物系難燃剤等を例示できる。
「ワックス」として、パラフィンワックスやマイクロクリスタリンワックス等のワックスが好ましい。
図1は、本発明の太陽電池バックシートの断面図である。太陽電池バックシート10は、2枚のフィルムとその間の屋外用ウレタン接着剤13から形成されており、2枚のフィルム11及び12は、屋外用ウレタン接着剤13によって貼り合わされている。フィルム11及び12は、同一の材料であっても、異なる材料であってもよい。図1では、2枚のフィルム11及び12は、貼り合わされているが、3枚以上のフィルムが貼り合わされていてもよい。
フィルム11の蒸着薄膜11aとフィルム12とは、本発明の屋外用ウレタン接着剤13を用いて貼り付けられるが、フィルム11及び12は、ドライラミネート法によって積層されることが多い。
太陽電子セル30は、シリコンを用いて製造されることが多いが、色素を含んだ有機樹脂を用いて製造されることもある。その場合、太陽電池モジュール1は、有機系(色素増感)太陽電池モジュールとなる。有機系(色素増感)太陽電池には着色性が要求されるので、太陽電池バックシート10を構成するフィルム11及び12として透明フィルムが使用されることが多い。従って、太陽電池バックシート用接着剤13には、長期間屋外で曝されたとしても、色差変化が極めて小さく、耐候性に優れていることが要求される。
1.イソシアネート化合物(a1)とエステル結合を有するポリオール(a2)が反応して得られるウレタン樹脂(A)を含み、
イソシアネート化合物(a1)は脂肪族イソシアネート及び脂環式イソシアネートから選択される少なくとも1種を含み、
ポリオール(a2)は、ポリエステルポリオール(a2-1)とアクリルポリオール(a2-2)の両方を含む屋外用ウレタン接着剤。
2.アクリルポリオール(a2-2)は、合計で4以上の炭素原子を含むアルキル基がエステル結合と結合している、上記1に記載の屋外用ウレタン接着剤。
3.ポリエステルポリオール(a2-1)は、ジカルボン酸と多価アルコールとの重縮合により得られ、
該多価アルコールは、分岐状脂肪族ジオールを含み、その分岐状脂肪族ジオールの1分子中の分岐した側鎖は、合計で2以上の炭素原子を含む、上記1又は2に記載の屋外用ウレタン接着剤。
4.上記分岐脂肪族ジオールは、2-ブチル-2-エチル-1,3-プロパンジオール及び2,4-ジエチル-1,5-ペンタンジオールから選択される少なくとも1種である上記3に記載の屋外用ウレタン接着剤。
5.(B)ヒドロキシフェニリトリアジン系化合物を、更に含む上記1~4のいずれかに記載の屋外用ウレタン接着剤。
6.上記1~5のいずれかに記載の屋外用ウレタン接着剤を用いて得られる太陽電池バックシート。
7.上記6に記載の太陽電池バックシートを用いて得られる太陽電池モジュール。
実施例及び比較例で使用した屋外用ウレタン接着剤の原料を以下に記載する。
(a1-1)脂肪族イソシアネート:1,6-ジイソシアナトヘキサン(HDI)の3量体(イソシアヌレート)<住化バイエルウレタン社製のスミジュールN3300(商品名)NCO%=21.8%>
(a1-2)脂肪族イソシアネート:キシリレンジイソシアネート(XDI)<三井化学社製のタケネート500(商品名)、NCO%=44.7%>
(a1-3)脂肪族イソシアネート:キシリレンジイソシアネート(XDI)のTMPアダクト<三井化学社製のタケネートD-110N(商品名)(不揮発分:75%)の固形分、NCO%=15.7%(固形分として)>
注)表の数値は固形分値
(a1-4)脂環式イソシアネート:イソホロンジイソシアネート(IPDI)の3量体(イソシアヌレート)<エボニックデグサ社製のVESTANAT T1890/100(商品名)、NCO%=17.3%>
(a1’-1)ポリメリックMDI:住化バイエルウレタン社製のスミジュール44V-10(商品名)、NCO%=31.0%)
(a2-1)ポリエステルポリオール
(a2-1-1)<多価アルコールとして2-ブチル-2-エチル-1,3-プロパンジオールを使用して得たポリエステルポリオール>
以下の要領で合成して得たものを使用した。
攪拌器、温度計、窒素導入管、冷却管を備え付けた4つ口フラスコにイソフタル酸(和光純薬工業(株)製)201g、無水フタル酸(和光純薬工業(株)製)100.1g、セバシン酸(和光純薬工業(株)製)250g、ポリカプロラクトンポリオール(製品名Capa2043、Perstorp社製)39.5g、2-ブチル-2-エチル-1,3-プロパンジオール(Perstorp社製)601.1g、トリメチロールプロパン(和光純薬工業(株)製)8.21gを仕込み130℃に昇温後、チタンテトライソプロポキシド(和光純薬工業(株)製)0.2gを加え、更に昇温、脱水を行ない、220℃で減圧反応を行なうことにより所望のポリエステルポリオールを得た。
豊国製油社製のHS 2N-226P(商品名):無水フタル酸、2,4-ジブチル-1,5-ペンタンジオールからなるポリエステルポリオール
(a2-2-1)エストロンケミカル社製のイソクリルH270(商品名):メチルメタクリレート、ブチルアクリレート、ブチルメタクリレート、2-ヒドロキシエチルメタクリレートから得られ、ブチルアクリレートとブチルメタクリレート(エステル結合に結合したアルキル基の炭素数が4)の合計の含有量が70重量%であるアクリルポリオール
以下の要領で合成して得たものを使用した。
攪拌翼、温度計、及び還流冷却管を備えた四つ口フラスコに、酢酸エチル;[和光純薬(株)製]150gを仕込み、約80℃で還流させた。このフラスコ内に、重合開始剤として2,2-アゾビスイソブチロニトリルを1g加え、以下記載の単量体の混合物を1時間30分かけてフラスコ内に連続的に滴下した。さらに2時間加熱した後、不揮発分が32.2%のアクリルポリオール(a2-2-2)溶液を得た。
・メチルメタクリレート(MMA);和光純薬(株)製、10g
・ブチルアクリレート(BA);和光純薬(株)製、20g
・シクロヘキシルメタクリレート(CHMA);和光純薬(株)製、40g
・ブチルメタクリレート(BA);和光純薬(株)製、22g
・グリシジルメタクリレート(GMA);和光純薬(株)製、2g
・2-ヒドロキシエチルメタクリレート(HEMA);和光純薬(株)製、6g
注)表の数値は固形分値
注)表の数値は固形分値
(B-1)BASF社製のチヌビン479(商品名):2-[4-(オクチル-2-メチルエタノエート)オキシ-2-ヒドロキシフェニル]-4,6-[ビス(2,4-ジメチルフェニル)]-1,3,5-トリアジン
(B’-1)BASF社製のチヌビン234(商品名):2-[2-ヒドロキシ-3,5-ビス(α,α-ジメチルベンジル)フェニル]-2H-ベンゾトリアゾール
(C-1)チッソ社製のサイラエースS530(商品名):2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン
(D-1)BASF社製のイルガノックス1330(商品名):1,3,5-トリメチル-2,4,6-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン
(E-1)BASF社製のチヌビン765(商品名):セバシン酸ビス(1,2,2,6,6-ペンタメチル-4-ピペリジル
<屋外用ウレタン接着剤の製造>
表1に示すように、(a1-1)住化バイエルウレタン社製のスミジュールN3300(商品名)を8.23g、ポリエステルポリオール(a2-1-1)を22.38g、
(B’-1)BASF社製のチヌビン234(商品名)を1.46g、
(C-1)チッソ社製のサイラエースS530(商品名)を0.68g
(D-1)BASF社製のイルガノックス1330(商品名)を0.19g
(E-1)BASF社製のチヌビン765(商品名)を0.19g
を秤量して混合した後、これら混合物に酢酸エチルを添加して固形分30%の溶液を調製した。この調製液を屋外用ウレタン接着剤とし、以下の試験を行った。
<初期粘着性確認サンプルの作製>
実施例1の屋外用ウレタン接着剤を透明ポリエチレンテレフタレート(PET)シート(三菱化学ポリエステルフィルム社製のO300EW36(商品名))に固形分重量が10g/m2となるように塗布し、80℃で10分間乾燥させ初期粘着性確認サンプルとした。
先ず、実施例1の屋外用ウレタン接着剤を透明ポリエチレンテレフタレート(PET)シート(三菱化学ポリエステルフィルム社製のO300EW36(商品名))に固形分重量が10g/m2となるように塗布し、80℃で10分間乾燥させた。
その後、PETシートの接着剤塗布面に、表面処理透明ポリオレフィンフィルム(フタムラ化学社製のリニアローデンシティポリエチレンフィルム LL-XUMN #30(商品名))の表面処理された面を被せ、平面プレス機(神藤金属工業社製のASF-5(商品名))で圧締圧1.0MPa 50℃で30分間、両フィルムをプレスした。その後、得られたフィルム積層物を15mm幅、95mm長に切り出して耐せん断クリープ確認サンプルとした。
先ず、実施例1の屋外用ウレタン接着剤を透明ポリエチレンテレフタレート(PET)シート(三菱化学ポリエステルフィルム社製のO300EW36(商品名))に固形分重量が10g/m2となるように塗布し、80℃で10分間乾燥させた。
その後、PETシートの接着剤塗布面に、表面処理透明ポリオレフィンフィルム(フタムラ化学社製のリニアローデンシティポリエチレンフィルム LL-XUMN #30(商品名))の表面処理された面を被せ、平面プレス機(神藤金属工業社製のASF-5(商品名))で圧締圧1.0MPa 50℃で30分間、両フィルムをプレスした。その後、40℃で1週間養生し、得られたフィルム積層物を15mm幅に切り出して硬化後接着性能確認サンプルとし、25mm角に切り出したものを黄変度確認サンプルとした。
実施例1の屋外用ウレタン接着剤をポリエチレン製のカップに3.3mmの厚さになるように注ぎ込み、そのまま室温で1日養生した後に40℃で1週間し、厚さ1mmの硬化皮膜を得て、それを5mm幅、30mm長に切り出して硬化皮膜の特性確認サンプルとした。
屋外用ウレタン接着剤の評価を以下の方法で行った。
<<初期(硬化前)接着性能>>
<初期粘着性>
前述初期粘着性確認サンプルの塗工面を指触し、初期粘着性の程度を確認した。
◎: 十分なタックあり(初期粘着性良好)、
○: タックあり(初期粘着性良好)、
×: タックがほとんど見られない(初期粘着性不良)
前述耐せん断クリープ確認サンプルの表面処理透明ポリオレフィンフィルム側に30gのおもりをぶら下げ、室温で20時間放置し、ポリオレフィルムのズレを測定した。
◎: ズレ 4mm未満、
○: ズレ 4mm以上8mm未満
×: ズレ 8mm以上
前述フィルム積層物(15mm幅)を、引っ張り強度試験機(オリエンテック社製のテンシロンRTM-250(商品名))を用いて、室温環境下、100mm/min、引っ張り速度180°の剥離試験を行った。評価基準は以下のとおりである。
◎:剥離強度が9N/15mm以上
○:剥離強度が6N/15mm以上9N/15mm未満
×:剥離強度が6N/15mm未満
<柔軟性>
前述硬化皮膜の特性確認サンプルを長軸側の端部を重ね合わせる形で折り曲げ、柔軟性を確認した。
○: 折れない
×: 折れる
前述硬化皮膜の特性確認サンプルをプレッシャークッカー試験機(ヤマト科学社製 オートクレーブSP300(商品名))に投入し、120℃、0.1MPa加圧環境下300時間後の接着剤硬化皮膜表面のタックの指蝕にて有無を確認した。
◎: 全くタック発現なし、
○: ごく若干のタック発現、
×: 顕著なタック発現
前述フィルム積層物(25mm角)のポリオレフィンフィルム側を照射面として、UV照射試験機(岩崎電気社製のアイスーパーUVテスター W13(商品名)))にセットし、照度1000W/m2、60℃50%RHの条件下で15時間の照射を行った。色差計にて照射前後の色差(Δb)を測定し、黄変度を評価した。評価基準は以下のとおりである。
◎:Δbが10未満
○:Δbが10以上 15未満
×:Δbが15以上
特に、実施例2~9の接着剤は、ヒドロキシフェニルトリアジン系の紫外線吸収剤を含むので、黄変度が◎になっており、耐候性が著しく向上しており、有機系(色素増感)太陽電池用バックシート接着剤として極めて有用である。
このように、(a2)ポリオールがポリエステルポリオールとアクリルポリオールの両成分を含むことによって、ウレタン接着剤の初期(硬化前)接着性、硬化後接着性、硬化皮膜の特性が向上することが実証された。
[関連出願]
尚、本出願は、2010年12月28日に日本国でされた出願番号2010-292442を基礎出願とするパリ条約第4条に基づく優先権を主張する。この基礎出願の内容は、参照することによって、本明細書に組み込まれる。
10 バックシート
11 フィルム
11a 蒸着薄膜
12 フィルム
13 接着剤層
20 封止材(EVA)
30 太陽電池セル
40 ガラス板
50 スペーサ
Claims (6)
- イソシアネート化合物(a1)とエステル結合を有するポリオール(a2)が反応して得られるウレタン樹脂(A)を含み、
イソシアネート化合物(a1)は脂肪族イソシアネート及び脂環式イソシアネートから選択される少なくとも1種を含み、
ポリオール(a2)は、ポリエステルポリオール(a2-1)とアクリルポリオール(a2-2)の両方を含む屋外用ウレタン接着剤。 - アクリルポリオール(a2-2)は、合計で4以上の炭素原子を含むアルキル基がエステル結合と結合している、請求項1に記載の屋外用ウレタン接着剤。
- ポリエステルポリオール(a2-1)は、ジカルボン酸と多価アルコールとの重縮合により得られ、
該多価アルコールは、分岐状脂肪族ジオールを含み、その分岐状脂肪族ジオールの1分子中の分岐した側鎖は、合計で2以上の炭素原子を含む、請求項1又は2に記載の屋外用ウレタン接着剤。 - (B)ヒドロキシフェニリトリアジン系化合物を、更に含む請求項1~3のいずれかに記載の屋外用ウレタン接着剤。
- 請求項1~4のいずれかに記載の屋外用ウレタン接着剤を用いて得られる太陽電池バックシート。
- 請求項5に記載の太陽電池バックシートを用いて得られる太陽電池モジュール。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR112013016313A BR112013016313A2 (pt) | 2010-12-28 | 2011-12-22 | agente adesivo de uretano para outdoor |
| KR1020137016726A KR20140014097A (ko) | 2010-12-28 | 2011-12-22 | 옥외용 우레탄 접착제 |
| EP11853024.5A EP2679650A4 (en) | 2010-12-28 | 2011-12-22 | FOREIGN-urethane |
| CN201180062796.8A CN103282459B (zh) | 2010-12-28 | 2011-12-22 | 室外聚氨酯胶黏剂 |
| US13/924,651 US20130276858A1 (en) | 2010-12-28 | 2013-06-24 | Outdoor urethane adhesive |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010292442A JP2012140494A (ja) | 2010-12-28 | 2010-12-28 | 屋外用ウレタン接着剤 |
| JP2010-292442 | 2010-12-28 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/924,651 Continuation US20130276858A1 (en) | 2010-12-28 | 2013-06-24 | Outdoor urethane adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012090857A1 true WO2012090857A1 (ja) | 2012-07-05 |
Family
ID=46382963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/079810 Ceased WO2012090857A1 (ja) | 2010-12-28 | 2011-12-22 | 屋外用ウレタン接着剤 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20130276858A1 (ja) |
| EP (1) | EP2679650A4 (ja) |
| JP (1) | JP2012140494A (ja) |
| KR (1) | KR20140014097A (ja) |
| CN (1) | CN103282459B (ja) |
| BR (1) | BR112013016313A2 (ja) |
| WO (1) | WO2012090857A1 (ja) |
Cited By (4)
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| JP2014017431A (ja) * | 2012-07-11 | 2014-01-30 | Toray Ind Inc | 太陽電池表面保護シート及びそれを有する太陽電池モジュール |
| JP2015199946A (ja) * | 2014-03-31 | 2015-11-12 | 荒川化学工業株式会社 | 銅薄膜付基材用アンダーコート剤、銅薄膜付基材及びその製造方法、並びに導電性フィルム及び電極フィルム |
| JP2015199947A (ja) * | 2014-03-31 | 2015-11-12 | 荒川化学工業株式会社 | 銅薄膜付基材用アンダーコート剤、銅薄膜付基材及びその製造方法、並びに導電性フィルム及び電極フィルム |
| JP2022055658A (ja) * | 2020-09-29 | 2022-04-08 | Dic株式会社 | 反応性接着剤、積層フィルム、及び包装材 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102887988B (zh) * | 2012-10-24 | 2014-11-05 | 阿特斯(中国)投资有限公司 | 一种光伏背板胶黏剂及其制备方法 |
| CN105428445B (zh) * | 2014-08-26 | 2017-06-06 | 明冠新材料股份有限公司 | 一种太阳能光伏电池组件透明背板复合膜及其制备方法 |
| JP2016089034A (ja) * | 2014-11-05 | 2016-05-23 | Dic株式会社 | ポリエステルポリイソシアネート、これを用いる2液型ウレタン系接着剤用硬化剤、2液型ウレタン系接着剤、積層フィルム及び太陽電池のバックシート |
| JP2016089035A (ja) * | 2014-11-05 | 2016-05-23 | Dic株式会社 | ポリエステルポリイソシアネート、これを用いる2液型ウレタン系接着剤用硬化剤、2液型ウレタン系接着剤、積層フィルム及び太陽電池のバックシート |
| CN104497954B (zh) * | 2014-12-13 | 2016-08-24 | 乐凯胶片股份有限公司 | 一种胶黏剂组合物及太阳能电池背膜 |
| CN110257000A (zh) * | 2019-06-28 | 2019-09-20 | 北京知淘科技有限责任公司 | 一种太阳能光伏组件背板用胶黏剂及其制备方法 |
| CN114163965B (zh) * | 2021-12-24 | 2023-07-14 | 沈阳化工研究院有限公司 | 一种太阳能背板用双组分无溶剂聚氨酯胶粘剂 |
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| JP2015199946A (ja) * | 2014-03-31 | 2015-11-12 | 荒川化学工業株式会社 | 銅薄膜付基材用アンダーコート剤、銅薄膜付基材及びその製造方法、並びに導電性フィルム及び電極フィルム |
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| JP2022055658A (ja) * | 2020-09-29 | 2022-04-08 | Dic株式会社 | 反応性接着剤、積層フィルム、及び包装材 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140014097A (ko) | 2014-02-05 |
| US20130276858A1 (en) | 2013-10-24 |
| BR112013016313A2 (pt) | 2018-07-03 |
| EP2679650A1 (en) | 2014-01-01 |
| CN103282459A (zh) | 2013-09-04 |
| CN103282459B (zh) | 2016-03-16 |
| JP2012140494A (ja) | 2012-07-26 |
| EP2679650A4 (en) | 2016-09-07 |
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