WO2016010132A1 - 太陽電池バックシート用接着剤、太陽電池バックシート接着剤用ポリオール組成物、太陽電池バックシート、及び太陽電池モジュール - Google Patents
太陽電池バックシート用接着剤、太陽電池バックシート接着剤用ポリオール組成物、太陽電池バックシート、及び太陽電池モジュール Download PDFInfo
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- WO2016010132A1 WO2016010132A1 PCT/JP2015/070482 JP2015070482W WO2016010132A1 WO 2016010132 A1 WO2016010132 A1 WO 2016010132A1 JP 2015070482 W JP2015070482 W JP 2015070482W WO 2016010132 A1 WO2016010132 A1 WO 2016010132A1
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- adhesive
- resin
- hydroxyl group
- polyol
- solar
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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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/30—Coatings
- H10F77/306—Coatings for devices having potential barriers
- H10F77/311—Coatings for devices having potential barriers for photovoltaic cells
-
- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
- C08G18/3842—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring
- C08G18/3844—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring containing one nitrogen atom in the ring
- C08G18/3846—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring containing one nitrogen atom in the ring containing imide groups
-
- 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
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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
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- 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
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- 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
-
- 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
- C09J201/06—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
-
- 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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- 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
Definitions
- the present invention provides at least one hydroxyl group-containing resin (A) selected from polyester polyurethane polyol (A1), polyester polyol (A2), hydroxyl group-containing (meth) acrylic resin (A3), and fluororesin (A4), polyisocyanate. It is related with the adhesive which uses (B) and a cyclic amide compound (C) as an essential component, the polyol composition used for this adhesive, the solar cell backsheet using the said adhesive agent, and a solar cell module.
- Solar cells used for photovoltaic power generation constitute the heart of a photovoltaic power generation system that directly converts sunlight energy into electrical energy, and are made of semiconductors such as silicon.
- solar cell elements are wired in series and in parallel, and various types of packaging are performed to protect the elements over a long period of about 30 years.
- the unit incorporated in this package is called a solar cell module.
- the surface exposed to sunlight is covered with glass, the gap is filled with a sealing material made of thermoplastic resin, and the back surface is protected with a protective sheet (back sheet). It has become the composition.
- the thermoplastic resin used as such a sealing material is mainly an ethylene-vinyl acetate copolymer resin (hereinafter abbreviated as “EVA resin”) because of its high transparency and excellent moisture resistance. Used for.
- EVA resin ethylene-vinyl acetate copolymer resin
- the back protection sheet (back sheet) is required to have properties such as mechanical strength, weather resistance, heat resistance, moist heat resistance, and light resistance. Therefore, the PET film is used as a base film for the purpose of imparting light resistance. Sheets having a structure in which a white fluorine film containing an inorganic pigment is bonded to each other are widely used.
- polyisocyanate curable adhesives are widely used.
- a branched structure has been introduced into the molecular structure as an adhesive that can express a high level of adhesive performance even under harsh environments under humid heat conditions.
- Mw weight average molecular weight
- Mn wide molecular weight distribution
- An adhesive used as a curing agent is known (see Patent Document 1 below).
- Patent Document 1 exhibits excellent adhesion performance even in a wet and heat environment, the curing rate is low, and curing for several days is necessary for sufficient curing. Requires an aging process at 40 ° C. for about 3 to 5 days, which is a factor that reduces the productivity of the backsheet.
- the problem to be solved by the present invention is an adhesive for solar battery back sheet that is excellent in curing speed and can exhibit excellent adhesive performance with short-term aging, a polyol composition used in the adhesive, and the adhesive It is providing the solar cell backsheet using this, and the solar cell module using this sheet
- the present inventors have dramatically improved the curing rate by adding a cyclic amide compound in addition to the polyol component as the main component and the polyisocyanate component as the curing agent.
- the inventors have found that excellent adhesive strength is expressed by short-term aging, and have completed the present invention.
- the present invention provides at least one hydroxyl group-containing resin selected from polyester polyurethane polyol (A1), polyester polyol (A2), hydroxyl group-containing (meth) acrylic resin (A3) and hydroxyl group-containing hydroxyl group-containing fluororesin (A4) ( It is related with the adhesive for solar cell backsheets which uses A), a polyisocyanate (B), and a cyclic amide compound (C) as an essential component.
- the present invention also provides at least one hydroxyl group-containing resin selected from polyester polyurethane polyol (A1), polyester polyol (A2), hydroxyl group-containing (meth) acrylic resin (A3), and hydroxyl group-containing hydroxyl group-containing fluororesin (A4). It is related with the polyol composition for solar cell backsheet adhesives which has (A) and cyclic amide compound (C) as an essential component.
- the present invention is also a laminate film in which a first base sheet, an adhesive layer, and a second base sheet are laminated in this order, and the adhesive layer is composed of a cured product of the adhesive for a solar battery back sheet. It is related with the solar cell backsheet characterized by the above-mentioned.
- the present invention also provides a solar cell and a surface protective substrate on the light absorption side surface thereof, and the solar cell backsheet on the back side of the solar cell, and the gap between the surface protective substrate and the backsheet is disposed in the solar cell.
- the present invention relates to a solar cell module having a configuration sealed with a battery cell sealing material.
- the adhesive for solar cell backsheets which can express the outstanding adhesive performance by short-time aging, the polyol composition used for this adhesive, the sun using this adhesive
- a battery back sheet and a solar cell module using the sheet can be provided.
- organotin catalysts specifically, mainly dibutyltin dilaurate (DBTDL) or octyltin maleate are widely used as catalysts for urethanization reaction by polyisocyanate curing.
- DBTDL dibutyltin dilaurate
- octyltin maleate are widely used as catalysts for urethanization reaction by polyisocyanate curing.
- the adhesive for solar battery backsheet of the present invention is a two-component mixed adhesive having a hydroxyl group-containing resin (A) as a main agent and a polyisocyanate (B) as a curing agent. In addition to these, a cyclic amide compound (C) is added. It is characterized by using.
- the hydroxyl group-containing resin (A) used here is one or more selected from polyester polyurethane polyol (A1), polyester polyol (A2), hydroxyl group-containing (meth) acrylic resin (A3) and fluororesin (A4). It is done. This resin may be used individually by 1 type, and may use several resin.
- polyester polyurethane polyol (A1) examples include a resin obtained by reacting a polyol (a1), a polycarboxylic acid (a2), and a polyisocyanate (b1).
- polyol (a1) examples include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, diethylene glycol, triethylene glycol, tetra Aliphatic diols such as ethylene glycol, dipropylene glycol, tripropylene glycol and dimer diol; 3-methyl-1,5-pentanediol, 2,2,4-trimethyl-1,3-pentanediol, neopentyl glycol, methyl Pentanediol, dimethylbutanediol, 1,2,2-trimethyl-1,3-propanediol, 2,2-dimethyl-3-isopropyl-1,3-propanediol, 3-methyl-1,3-butanediol, 1,4-cyclohex Aliphatic diols having a branched structure
- Polyether diol obtained by addition polymerization of monomers such as lenoxide, styrene oxide, epichlorohydrin, tetrahydrofuran, cyclohexylene; trifunctional or higher functional aliphatic polyol such as trimethylolethane, trimethylolpropane, glycerin, hexanetriol, pentaerythritol;
- trifunctional or higher functional polyols such as lactone polyester polyols obtained by polycondensation reaction of the above trifunctional or higher aliphatic polyols with various lactones such as ⁇ -caprolactone.
- polycarboxylic acid (a2) examples include succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedicarboxylic acid, Aliphatic dicarboxylic acids such as tridecanedioic acid, fumaric acid, 1,3-cyclopentanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, maleic anhydride, dimer acid;
- Terephthalic acid isophthalic acid, 1,4-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, naphthalic acid, biphenyldicarboxylic acid, 1,2-bis (phenoxy) ethane-p, p '-Dicarboxylic acids and anhydrides or ester-forming derivatives of these dicarboxylic acids; p-hydroxybenzoic acid, p- (2-hydroxyethoxy) benzoic acid and aromatic dicarboxylic acids such as ester-forming derivatives of these dihydroxycarboxylic acids Aliphatic tribasic acids such as 1,2,5-hexanetricarboxylic acid and 1,2,4-cyclohexanetricarboxylic acid;
- aromatic tribasic acids such as trimellitic acid, trimellitic anhydride, 1,2,5-benzenetricarboxylic acid, 2,5,7-naphthalenetricarboxylic acid, and anhydrides thereof.
- polyisocyanate (b1) examples include organic compounds having at least two isocyanate groups in the molecule.
- aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate
- Aliphatic diisocyanates such as 6-hexamethylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), lysine diisocyanate, trimethylhexamethylene diisocyanate, 1,3- (isocyanatomethyl) cyclohexane
- Methane triisocyanate Trimethylol adduct of aliphatic diisocyanate, Trimethyl of aromatic diisocyanate Ruadakuto body, biuret of the aliphatic diisocyanate, biuret of the aromatic diisocyanate, an isocyanurate of the
- the polyester polyurethane polyol (A1) used in the present invention is obtained by reacting the polyol (a1), the polycarboxylic acid (a2), and the polyisocyanate (b1) by appropriately combining the compounds exemplified as appropriate. Among them, it has a branched structure in the molecule, the weight average molecular weight (Mw) is in the range of 25,000 to 200,000, and the molecular weight distribution (Mw / Mn) is 2.5 or more.
- a certain polyester polyurethane polyol (A′1) is preferable from the standpoint that not only the aging time is shortened but also an adhesive having good substrate adhesiveness under wet heat conditions is obtained.
- the polyester polyurethane polyol (A′1) has a weight average molecular weight (Mw) in the range of 25,000 to 200,000, the cured product exhibits high strength, and excellent initial adhesive strength.
- the adhesive has a viscosity suitable for coating.
- the weight average molecular weight (Mw) is in the range of 30,000 to 100,000 in that a resin composition having high initial adhesive strength and excellent base material adhesion under wet heat conditions can be obtained. It is preferable.
- the molecular weight distribution (Mw / Mn) of the polyester polyurethane polyol (A′1) is 2.5 or more, and the effect of improving the adhesion with the substrate due to the low molecular weight component, and the high molecular weight Since the effect of increasing the strength of the cured product resulting from the components is exhibited at the same time, the substrate has excellent adhesiveness under wet heat conditions and high initial adhesive strength.
- the molecular weight distribution (Mw / Mn) is preferably in the range of 3 to 25 and preferably in the range of 4 to 15 in that a resin composition that is more excellent in substrate adhesion under wet heat conditions can be obtained. More preferably, the range of 6 to 10 is particularly preferable.
- the weight average molecular weight (Mw) and the number average molecular weight (Mn) are values measured by gel permeation chromatography (GPC) under the following conditions.
- Measuring device HLC-8220GPC manufactured by Tosoh Corporation Column: TSK-GUARDCOLUMN SuperHZ-L manufactured by Tosoh Corporation + Tosoh Corporation TSK-GEL SuperHZM-M ⁇ 4 Detector: RI (differential refractometer)
- Data processing Multi-station GPC-8020model II manufactured by Tosoh Corporation Measurement conditions: Column temperature 40 ° C Solvent Tetrahydrofuran Flow rate 0.35 ml / min Standard; Monodisperse polystyrene Sample; Filtered 0.2% by mass tetrahydrofuran solution in terms of resin solids with a microfilter (100 ⁇ l)
- the hydroxyl value of the polyester polyurethane polyol (A′1) is preferably in the range of 5 to 30 mg KOH / g, more preferably in the range of 7 to 15 mg KOH / g, from the viewpoint of excellent substrate adhesion under wet heat conditions. It is more preferable that
- the polyester polyurethane polyol (A′1) is a trifunctional or higher functional compound in any of the polyol (a1), the polycarboxylic acid (a2), and the polyisocyanate (b1), for example, the polyol (a1).
- the trifunctional or higher polyol is used, the aliphatic tribasic acid or the aromatic tribasic acid and its anhydride are used as the polycarboxylic acid (a2), or the trifunctional or higher functional is used as the polyisocyanate (b1).
- a branched structure can be introduced into the molecule of the polyester polyurethane polyol (A′1) finally obtained by using the polyisocyanate.
- the polycarboxylic acid (a2) includes suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, 1,2, An aliphatic dicarboxylic acid or an aliphatic tricarboxylic acid having 5 to 13 carbon atoms, such as 5-hexanetricarboxylic acid or 1,2,4-cyclohexanetricarboxylic acid, and the aromatic dicarboxylic acid or aromatic tricarboxylic acid; Is preferable in that an adhesive having a viscosity excellent in substrate adhesion under wet heat conditions and suitable for coating can be obtained. Specifically, fats in the polycarboxylic acid (a2) are used.
- the content of the group polybasic acid is preferably in the range of 20 to 50 mol%.
- the raw material of the polyester polyurethane polyol (A) is methanoic acid, ethanoic acid, propanoic acid, butanoic acid, pentanoic acid.
- Monocarboxylic acids such as hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, and benzoic acid may be used.
- the polyol (a1) is preferably an adhesive having excellent coatability, and the content of the aliphatic alcohol in the polyol (a1) component is preferably 50 mol% or more, and 80 mol % Or more is more preferable.
- the polyisocyanate (b1) used when the polyester polyurethane polyol (A′1) is produced the polyfunctional polyhydric acid having a trifunctional or higher functionality is obtained in that a resin composition having excellent adhesive strength under wet heat conditions can be obtained. It is preferable to use an isocyanate compound, and a nurate type polyisocyanate compound is more preferable. Moreover, it is preferable to use together the said diisocyanate compound and the said polyisocyanate compound more than trifunctional in the point which becomes easy to adjust the resin composition to the viscosity suitable for coating.
- the mass ratio [diisocyanate compound / trifunctional or higher polyisocyanate compound] of the two is that the resin composition has excellent substrate adhesion under wet heat conditions and exhibits a viscosity suitable for coating.
- a range of 50/50 to 5/95 is preferred.
- the polyester polyurethane polyol (A1) can be produced by reacting the polyol (a1) with the polycarboxylic acid (a2) in the presence of an esterification catalyst in the temperature range of 150 to 270 ° C. And a method of reacting the polyester polyol with the polyisocyanate (b1) in the presence of a urethanization catalyst in a temperature range of 50 to 100 ° C.
- polyester polyol (A2) for example, any polyester resin obtained by reacting the polyol (a1) with the polycarboxylic acid (a2) can be used. Among them, a branched structure is formed in the molecule.
- the adhesiveness to the base material when used as an adhesive for a two-component laminate is good, and curing
- the adhesive strength after curing is good when the molecular weight distribution (Mw / Mn) is 4.7 or less.
- a polyester polyol having a branched structure in the molecule having a weight average molecular weight (Mw) in the range of 10,000 to 100,000, and a molecular weight distribution (Mw / Mn) in the range of 3.0 to 4.7.
- Mw weight average molecular weight
- Mw / Mn molecular weight distribution
- an aliphatic diol having a branched structure in the molecular structure is used as the polyol (a1)
- an aliphatic dicarboxylic acid having 8 to 13 carbon atoms is used as the polycarboxylic acid (a2).
- One example is a method using an aromatic polybasic acid having three or more carboxylic acids in one molecule.
- the branched alkylene diol used as the polyol (a1) is, for example, 3-methyl-1,5-pentanediol, 2,2,4-trimethyl-1,3-pentanediol, neopentyl glycol, methylpentanediol, Dimethylbutanediol, 1,2,2-trimethyl-1,3-propanediol, 2,2-dimethyl-3-isopropyl-1,3-propanediol, 3-methyl-1,3-butanediol, 1,4 -Alkylene diols having a tertiary or quaternary carbon atom in the molecular structure such as cyclohexanediol, 1,4-cyclohexanedimethanol, hydrogenated bisphenol A and the like.
- neopentyl glycol is particularly preferable from the viewpoint of excellent heat and heat resistance.
- Examples of the aliphatic dicarboxylic acid having 8 to 13 carbon atoms include suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, 1,2,5-hexanetricarboxylic acid, 1,2 , 4-cyclohexanetricarboxylic acid, and the like.
- the aliphatic dicarboxylic acid having 8 to 13 carbon atoms can reduce the viscosity of the resulting polyester polyol and can improve the adhesion to the substrate, This is preferable from the viewpoint of improving the appearance of the sheet after lamination.
- the polycarboxylic acid (a2) includes an aliphatic dicarboxylic acid or an aromatic tricarboxylic acid together with an aliphatic dicarboxylic acid having 8 to 13 carbon atoms. Is preferable in that an adhesive having a viscosity excellent in substrate adhesion under wet heat conditions and suitable for coating can be obtained. Specifically, fats in the polycarboxylic acid (a2) are used. The content of the group polybasic acid is preferably in the range of 20 to 50 mol%.
- polyester polyol (A′2) methanoic acid, ethanoic acid, propanoic acid, butanoic acid, pentanoic acid are used as raw materials for the polyester polyol (A′2).
- Monocarboxylic acids such as hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, and benzoic acid may be used.
- the polyester polyol (A2) can be produced by reacting the polyol (a1) with the polycarboxylic acid (a2) in the presence of an esterification catalyst in the temperature range of 150 to 270 ° C.
- an esterification catalyst in the temperature range of 150 to 270 ° C.
- the esterification catalyst used here include organic tin compounds, inorganic tin compounds, organic titanium compounds, and organic zinc compounds.
- the hydroxyl group-containing (meth) acrylic resin (A3) used in the present invention includes, for example, a hydroxyl group-containing acrylic monomer such as 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate, methyl (meth) acrylate, ethyl (meth) ) Acrylates, 2-propyl (meth) acrylates, n-propyl (meth) acrylates, butyl (meth) acrylates, 2-ethyl hesyl (meth) acrylates and the like obtained by copolymerization of (meth) acrylic acid alkyl esters Can be mentioned.
- a hydroxyl group-containing acrylic monomer such as 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate, methyl (meth) acrylate, ethyl (meth) ) Acrylates, 2-propyl (meth) acrylates, n-propyl (meth) acrylates, buty
- examples of the hydroxyl fluorine resin (A4) include a hydroxyl group-containing acrylic monomer such as 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate, vinyl fluoride [VF], tetrafluoroethylene [TFE], fluoride fluoride.
- a hydroxyl group-containing acrylic monomer such as 2-hydroxyethyl acrylate or 2-hydroxyethyl methacrylate, vinyl fluoride [VF], tetrafluoroethylene [TFE], fluoride fluoride.
- Rf 2 is copolymerized with at least one fluorine-containing ethylenic monomer is selected from the group consisting of alkyl perfluorovinyl ether derivative represented by the perfluoroalkyl group) having 1 to 5 carbon atoms Resin obtained in this way. Further, together with these monomers, (meth) acrylic acid acrylic ester or monochloroethylene may be copolymerized. Since these fluororesins are excellent in weather resistance, heat resistance, water vapor permeability, transparency, etc., they prevent deterioration of the material due to sunlight or the like, and are excellent in light transmittance.
- polyester polyurethane polyol (A1) and polyester polyol (A2) are particularly preferred from the viewpoint of good initial adhesive strength.
- a polyester polyol (A′2) having a weight average molecular weight (Mw) in the range of 10,000 to 100,000 and a molecular weight distribution (Mw / Mn) in the range of 3.0 to 4.7 is particularly preferable from the viewpoint of being excellent.
- the polyisocyanate (B) used in the present invention functions as a curing agent in the adhesive for solar cell backsheets of the present invention, and is a raw material for the polyester polyurethane polyol (A1) and polyester polyol (A2) described above.
- the polyisocyanate (b1) mentioned above can be used.
- aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate; 1,6-hexamethylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, 4,4′-methylene bis (cyclohexyl isocyanate), Aliphatic diisocyanates such as lysine diisocyanate, trimethylhexamethylene diisocyanate, 1,3- (isocyanatomethyl) cyclohexane; triphenylmethane triisocyanate, trimethylol adduct of the aliphatic diisocyanate, trimethylol adduct of the aromatic diisocyanate, Bullet body of the aliphatic diisocyanate, Bullet body of the aromatic diisocyanate, Aliphatic Isocyanurate of isocyanate, three or more functional groups of the polyisocyanate of isocyanate
- trifunctional or higher polyisocyanate compounds are preferred in the present invention because they are excellent in initial adhesive strength and strength retention after heat and humidity resistance.
- an isocyanurate of an aliphatic diisocyanate is used as the trifunctional or higher polyisocyanate compound, although the heat and moisture resistance after curing is good, the compound itself has low curability, so the cyclic amide in the present invention The effect of shortening the aging due to the use of the compound (C) appears remarkably, and as a result, the curability and the heat-and-moisture resistance can be combined at a high level.
- the equivalent ratio [NCO / OH] of the hydroxyl group of the polyol resin (A) to the isocyanate group of the polyisocyanate (B) is preferably 0.5 to 6.0.
- the equivalent ratio [NCO / OH] of the isocyanate groups of the polyisocyanate (B) to the total hydroxyl groups derived from the resin of the adhesive is 0.9.
- a range of ⁇ 3.5 is preferable from the viewpoint of excellent adhesive strength after curing and moist heat resistance.
- examples of the cyclic amide compound (C) used in the present invention include ⁇ -valerolactam, ⁇ -caprolactam, ⁇ -enanthollactam, ⁇ -capryllactam, ⁇ -propiolactam and the like.
- the effect speed of the adhesive is increased and the time of the aging process can be shortened.
- the production of the back sheet is usually performed using a polyisocyanate curing type urethane adhesive
- the aging process takes about 3 to 5 days at a temperature of 40 to 50 ° C.
- a sufficient level of adhesive strength can be developed in 1 day at 0 ° C.
- ⁇ -caprolactam is preferable.
- the cyclic amide compound (C) has a remarkable effect of improving the initial adhesive strength and the adhesive strength after wet heat when it is 0.05 to 8 parts by mass per 100 parts by mass of the hydroxyl group-containing resin (A). It is preferable from the point of appearance.
- an epoxy resin (D) in combination with the above-described components since the water resistance of the adhesive is improved and the adhesive strength after wet heat becomes better.
- Such an epoxy resin (D) has an epoxy equivalent of 170 to 700 g / eq.
- the liquid or solid epoxy resin is preferable.
- a solid epoxy resin those having a softening point of 50 to 90 ° C. are easy to handle and easy to adjust the adhesive, and appropriately contain a hydroxyl group in the epoxy resin structure. This is preferable from the viewpoint of good adhesive strength.
- the blending ratio of the epoxy resin (D) is preferably in the range of 1 to 20 parts by mass with respect to 100 parts by mass (solid content) of the polyol resin (A).
- epoxy resin (D) examples include bisphenol type epoxy resins such as bisphenol A type epoxy resin and bisphenol F type epoxy resin; biphenyl type epoxy resins such as biphenyl type epoxy resin and tetramethylbiphenyl type epoxy resin; dicyclopentadiene; -Phenol addition reaction type epoxy resin and the like. These may be used alone or in combination of two or more. Among these, a bisphenol type epoxy resin is preferable in that a resin composition excellent in base material adhesion under wet heat conditions and initial adhesive strength can be obtained.
- the adhesive of the present invention may be used in combination with the polycarbonate diol (E) to improve the water resistance of the adhesive and to have a good adhesive strength retention after heat and humidity.
- This is preferable.
- a polycarbonate diol (E) having a number average molecular weight (Mn) in the range of 500 to 3,000 has a moderately high hydroxyl group concentration and a marked improvement in the crosslinking density during curing.
- those having a number average molecular weight (Mn) in the range of 800 to 2,000 are more preferable.
- the hydroxyl group-containing aliphatic polycarbonate (E) has a hydroxyl value in the range of 20 to 300 mgKOH / g, in particular in the range of 40 to 250 mgKOH / g, in that it becomes a resin composition with better curability. More preferred. Moreover, it is preferable that it is polycarbonate diol at the point which is excellent in the base-material adhesiveness on wet heat conditions.
- the hydroxyl group-containing polycarbonate (E) can be produced, for example, by a polycondensation reaction of a polyhydric alcohol and a carbonylating agent.
- any of the compounds exemplified as the polyol (a1) which is a raw material of the above-described polyol can be used.
- examples of the carbonylating agent used in the production of the hydroxyl group-containing polycarbonate (E) include ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, and diphenyl carbonate. These may be used alone or in combination of two or more.
- the mixing ratio of the hydroxyl group-containing polycarbonate (E) is preferably in the range of 1 to 20 parts by mass with respect to 100 parts by mass (solid content) of the polyol resin (A).
- the above-described adhesive of the present invention is a two-component mixed adhesive having a hydroxyl group-containing resin (A) as a main agent and a polyisocyanate (B) as a curing agent, and a cyclic amide compound (C) is added thereto.
- the cyclic amide compound (C) may be mixed with the main agent and the curing agent when using the adhesive, but is previously blended with the hydroxyl group-containing resin (A) which is a polyol component.
- the polyol composition (X) Preparing the polyol composition (X) and blending it with the polyisocyanate (B), which is a curing agent component at the time of use, in addition to excellent workability at the time of use, storage of the main component and the curing agent component, respectively. It is preferable from the viewpoint that stability is also good.
- the polyol composition (X) preferably further contains an epoxy resin (D) and / or a polycarbonate diol (E).
- the blending amount is preferably in the range of 1 to 20 parts by mass with respect to 100 parts by mass (solid content) of the hydroxyl group-containing resin (A).
- the adhesive for solar cell backsheet of the present invention described in detail above may be used in combination with a pigment.
- usable pigments are not particularly limited.
- extender pigments, white pigments, black pigments, gray pigments, red pigments described in the Paint Material Handbook 1970 edition (edited by the Japan Paint Industry Association) examples thereof include organic pigments and inorganic pigments such as pigments, brown pigments, green pigments, blue pigments, metal powder pigments, luminescent pigments, and pearl pigments, and plastic pigments.
- colorants include various types, and examples of organic pigments include various insoluble azo pigments such as Bench Gin Yellow, Hansa Yellow, Raked 4R, etc .; Soluble properties such as Raked C, Carmine 6B, Bordeaux 10 and the like. Azo pigments;
- Various (copper) phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green; various chlorine dyeing lakes such as rhodamine lake and methyl violet lake; various mordant dye pigments such as quinoline lake and fast sky blue; anthraquinone pigment; Various vat dyes such as thioindigo pigments and perinone pigments; various quinacridone pigments such as Cincacia Red B; various dioxazine pigments such as dioxazine violet; various condensed azo pigments such as chromoftal; aniline Black etc. are mentioned.
- inorganic pigments include various chromates such as chrome lead, zinc chromate, and molybdate orange; various ferrocyan compounds such as bitumen; titanium oxide, zinc white, mapico yellow, iron oxide, bengara, chrome oxide Various metal oxides such as green and zirconium oxide; various sulfides or selenides such as cadmium yellow, cadmium red and mercury sulfide;
- Various sulfates such as barium sulfate and lead sulfate; Various silicates such as calcium silicate and ultramarine blue; Various carbonates such as calcium carbonate and magnesium carbonate; Various phosphates such as cobalt violet and manganese purple; Aluminum Various metal powder pigments such as powder, gold powder, silver powder, copper powder, bronze powder and brass powder; flake pigments of these metals, mica flake pigments; mica flake pigments coated with metal oxides, mica-like iron oxide Examples thereof include metallic pigments such as pigments and pearl pigments; graphite and carbon black.
- extender pigments examples include precipitated barium sulfate, powder, precipitated calcium carbonate, calcium bicarbonate, cryolite, alumina white, silica, hydrous finely divided silica (white carbon), ultrafine anhydrous silica (Aerosil), and silica sand (silica). Sand), talc, precipitated magnesium carbonate, bentonite, clay, kaolin, ocher and the like.
- plastic pigment examples include Grandol PP-1000 and PP-2000S manufactured by DIC Corporation.
- the pigment used in the present invention since it is excellent in durability, weather resistance and design, inorganic oxides such as titanium oxide and zinc white as a white pigment, and carbon black as a black pigment are more preferable.
- the mass ratio of the pigment used in the present invention is preferably 1 to 400 parts by mass, more preferably 10 to 300 parts by mass with respect to 100 parts by mass of the adhesive component, because it is excellent in adhesion, blocking resistance and the like. .
- the adhesive of the present invention may contain other additives other than those described above.
- the additive include an additive generally used for an adhesive for forming a film or a coating film.
- additives include leveling agents; inorganic fine particles such as colloidal silica and alumina sol; organic fine particles based on polymethyl methacrylate; antifoaming agents; anti-sagging agents; wetting and dispersing agents; silane coupling agents; Ultraviolet absorber; Metal deactivator; Peroxide decomposing agent; Flame retardant; Reinforcing agent; Plasticizer; Lubricant; Rust inhibitor; Fluorescent brightener; Inorganic heat absorber; Agents; dehydrating agents; and the like.
- the above-mentioned various pigments and other additives are preferably prepared as a main agent premix blended with the polyol composition (X), and this is mixed with the polyisocyanate compound (B) when using the adhesive. Can be prepared.
- the adhesive of the present invention is applied to the first base sheet, and after drying, the second second sheet is dried.
- the method of bonding a base material sheet is mentioned.
- the method of applying the adhesive of the present invention to the first base sheet is a comma coater, roll knife coater, die coater, roll coater, bar coater, gravure roll coater, reverse roll coater, blade coater, gravure coater. And a method performed by a coating apparatus such as a micro gravure coater.
- the coating width can be freely adjusted by decks attached to both ends of the die or the lip part.
- the application of the adhesive for two-component laminating to a plastic substrate is possible.
- the amount is preferably about 1 to 50 ⁇ m in terms of dry film thickness.
- the coating amount of the adhesive on the first substrate film is preferably in the range of 0.5 to 6.0 g / m 2 , particularly 1.0 to 4.0 g / m 2 .
- the adhesive is cured in 6 to 24 hours at room temperature or under heating, and practical physical properties can be expressed.
- the solar battery back sheet thus obtained is a composite sheet having a layer structure of the first base sheet, an adhesive layer composed of a cured product of the adhesive of the present invention, and a second base sheet. .
- the first base sheet or the first base sheet used here is, for example, a polyester resin sheet such as a polyethylene terephthalate sheet, a polybutylene terephthalate sheet, or a polynaphthalene terephthalate; a polyethylene sheet, a polypropylene sheet, or a polycyclopentadiene sheet.
- a polyester resin sheet such as a polyethylene terephthalate sheet, a polybutylene terephthalate sheet, or a polynaphthalene terephthalate
- a polyethylene sheet, a polypropylene sheet, or a polycyclopentadiene sheet is, for example, a polyester resin sheet such as a polyethylene terephthalate sheet, a polybutylene terephthalate sheet, or a polynaphthalene terephthalate.
- Polyolefin sheet polyvinyl fluoride sheet, polyvinylidene fluoride sheet, polytetrafluoroethylene sheet, tetrafluoroethylene-6 fluoropropylene copolymer (FEP) sheet, ethylene-4 fluoroethylene copolymer (ETFE) Fluorine resin sheets such as sheets and ethylene-tetrafluoroethylene copolymer sheets; and acrylic resin sheets such as polyacrylonitrile and polymethyl methacrylate.
- the solar cell backsheet of the present invention is preferably a polyester resin sheet, particularly a polyethylene terephthalate sheet as the first base sheet from the viewpoint of film rigidity and cost, and a fluororesin sheet as the second base sheet.
- a polyester resin sheet particularly a polyethylene terephthalate sheet as the first base sheet from the viewpoint of film rigidity and cost
- a fluororesin sheet as the second base sheet.
- the layer configuration of the solar battery back sheet may have the layer configuration of the first base sheet / adhesive layer / second base sheet.
- the fluororesin sheet functions as a weather resistant resin layer, and at the same time, an ethylene vinyl acetate resin ( From the viewpoint of excellent adhesiveness with EVA resin, those having a layer structure of fluororesin sheet / adhesive layer / polyester resin sheet / adhesive layer / fluororesin sheet in order from the sealing material side are preferable.
- a polyolefin sheet may be used as a base material sheet in contact with the sealing material. In that case, a polyolefin sheet / adhesive layer / polyester resin sheet / adhesive layer / fluororesin sheet layer in that order from the sealing material side. What is comprised is preferable.
- the thickness of the first base sheet or the second base sheet for the back sheet is not particularly limited and is preferably in the range of 10 to 400 ⁇ m, for example. Since the adhesive of the present invention can be applied in a small amount and dried at a low temperature for a short time, it exhibits excellent adhesion without giving any influence such as warping or settling on the substrate, and can impart excellent weather resistance. It is preferably in the range of ⁇ 300 ⁇ m.
- the solar cell module using the above-described solar cell backsheet of the present invention includes, for example, a solar cell and a surface protective substrate on the light absorption side surface, and a backsheet on the back side of the solar cell, and the surface protection What has the structure by which the gap
- the solar cell back sheet of this invention can be used as this back sheet.
- examples of the battery surface protecting material include a glass plate, a plastic plate of polycarbonate or polyacrylate, and the like.
- a glass plate is preferable.
- white glass with high transparency is preferable among the glass plates.
- ethylene vinyl acetate resin can be used for the sealing agent used for the solar cell module of the present invention.
- solar cells include single crystal silicon solar cell elements, polycrystalline silicon solar cell elements, single-junction type, tandem structure type amorphous silicon solar cell elements, gallium arsenide (GaAs), and the like.
- III-V compound semiconductor solar cell elements such as indium phosphorus (InP), II-VI compound semiconductor solar cell elements such as cadmium tellurium (CdTe), copper / indium / selenium (CIS), copper / indium / Gallium / selenium-based (CIGS-based), copper / indium / gallium / selenium / sulfur-based (CIGSS-based)
- I-III-VI group compound semiconductor solar cell elements dye-sensitized solar cell elements, organic solar cell elements Etc.
- a method for manufacturing such a solar cell module includes, for example, an ethylene vinyl acetate resin (EVA) sheet serving as a sealing material, a plurality of solar cells, an ethylene vinyl acetate resin (EVA) sheet, and a book on a battery surface protection material.
- EVA ethylene vinyl acetate resin
- the reaction was stopped when the acid value became 1.0 mgKOH / g or less, cooled to 100 ° C., and diluted to 80% solid content with ethyl acetate.
- 124 parts of hexamethylene diisocyanurate modified isocyanurate (Sumijoule N-3300; manufactured by Sumika Bayer Urethane Co., Ltd.) and 25 parts of hexamethylene diisocyanate were charged, and dry nitrogen was allowed to flow into the flask while stirring.
- the urethanization reaction was performed by heating to ⁇ 80 ° C.
- polyester polyurethane polyol A resin solution having a solid content of 62% obtained by diluting this with ethyl acetate is designated as polyester polyurethane polyol (A1).
- polyester polyol A resin solution having a solid content of 62% obtained by diluting this with ethyl acetate is designated as polyester polyol (B1).
- Adhesive composition ⁇ -caprolactam (Ube Industries) as the cyclic amide compound (C), JER1001 (epoxy equivalent 450-500 g / eq., Softening point 64 ° C., molecular weight 900, manufactured by Mitsubishi Chemical) as the epoxy resin (D), polycarbonate resin As (E), Plaxel CD210 (manufactured by Daicel Chemical Industries) having a number average molecular weight of about 1000 and a hydroxyl value of about 110 was used, and an adhesive main agent was prepared according to Table 1.
- Example adhesives 1 to 7 and comparative adhesives 1 to 3 were prepared by mixing together the main ingredients and curing agents containing polyester polyurethane polyol resin, epoxy resin and polycarbonate resin in the formulations shown in Tables 1 and 2. did.
- surface is a solid content mass part
- curing agent is a compounding quantity with respect to 100 mass parts of main agents.
- a 125 ⁇ m-thick PET film (Toray Co., Ltd. X10S) was used as the original fabric, and each of the above adhesive compositions was applied to 5 to 6 g / m 2 (dry mass) to obtain a 25 ⁇ m-thick film as a bonding film.
- a sample for evaluation was obtained using a fluorine film (Asahi Glass Co., Ltd. Aflex 25PW). The sample for evaluation was subjected to evaluation after aging at 40 ° C. for 24 hours.
- Adhesive strength Evaluation sample obtained through an aging process at 40 ° C. for 24 hours, using a tensile tester (manufactured by SHIMADZU; AGS500NG), strength at a peeling speed of 300 mm / min (N / 15 mm, T-type peeling) was evaluated as adhesive strength. The adhesive strength was measured after initial (after aging) and after exposure for 25 hours, 50 hours, and 75 hours in a 100% environment at 121 ° C. Initial strength: The initial adhesive strength was evaluated according to the following criteria.
- the retention rate of adhesive strength after 75 hours was evaluated according to the following criteria.
- the two-component mixed adhesive composition for laminating containing the polyol resin (A), polyisocyanate (B), and cyclic amide compound (C) of the present invention can be used as an adhesive for solar battery backsheets. .
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Abstract
Description
また、ポリイソシアネート硬化によるウレタン化反応の触媒として、有機スズ触媒、具体的には、主にジブチル錫ジラウレート(DBTDL)またはオクチル錫マレアート等が広く用いられているが、近年、有機スズ触媒はその毒性問題が指摘されているところ、本発明によれば斯かるスズ系触媒を用いることなく、硬化性を高めることができる。
トリデカン二酸、フマル酸、1,3-シクロペンタンジカルボン酸、1,4-シクロヘキサンジカルボン酸、無水マレイン酸、ダイマー酸等の脂肪族ジカルボン酸;
カラム ;東ソー株式会社製 TSK-GUARDCOLUMN SuperHZ-L
+東ソー株式会社製 TSK-GEL SuperHZM-M×4
検出器 ;RI(示差屈折計)
データ処理;東ソー株式会社製 マルチステーションGPC-8020modelII
測定条件 ;カラム温度 40℃
溶媒 テトラヒドロフラン
流速 0.35ml/分
標準 ;単分散ポリスチレン
試料 ;樹脂固形分換算で0.2質量%のテトラヒドロフラン溶液をマイクロフィルターでろ過したもの(100μl)
とあるのは「質量部」を示す。
攪拌棒、温度センサー、精留管を有するフラスコに、ネオペンチルグリコール1131部、イソフタル酸737部、無水フタル酸342部、セバシン酸534部、無水トリメリット酸20部及び有機チタン化合物1.3部を仕込み、乾燥窒素をフラスコ内にフローさせ攪拌しながら230~250℃に加熱しエステル化反応を行った。酸価が1.0mgKOH/g以下となったところで反応を停止し、100℃まで冷却後、酢酸エチルで固形分80%に希釈した。次いで、ヘキサメチレンジイソシアヌレートのイソシアヌレート変性体(スミジュール N-3300;住化バイエルウレタン株式会社製)124部、ヘキサメチレンジイソシアネート25部を仕込み、乾燥窒素をフラスコ内にフローさせ攪拌しながら70~80℃に加熱しウレタン化反応を行った。イソシアネート含有率0.3%以下となったところで反応を停止し、数平均分子量が5700、重量平均分子量が35000、分子量分布(Mw/Mn)が6.1、水酸基価が10(mgKOH/g)のポリエステルポリウレタンポリオールを得た。これを酢酸エチルで希釈して得られた固形分62%の樹脂溶液をポリエステルポリウレタンポリオール(A1)とする。
攪拌棒、温度センサー、精留管を有するフラスコに、ネオペンチルグリコール828部、イソフタル酸588部、無水フタル酸274部、セバシン酸407部、無水トリメリット酸15部及び有機チタン化合物1.0部を仕込み、乾燥窒素をフラスコ内にフローさせ攪拌しながら230~250℃に加熱しエステル化反応を行った。酸価が1.0mgKOH/g以下となったところで反応を停止し、数平均分子量が6700、重量平均分子量が22000、分子量分布(Mw/Mn)が3.3、水酸基価が12(mgKOH/g)のポリエステルポリオールを得た。これを酢酸エチルで希釈して得られた固形分62%の樹脂溶液をポリエステルポリオール(B1)とする。
環状アミド化合物(C)としてε-カプロラクタム(宇部興産社製)、エポキシ樹脂(D)としてJER1001(エポキシ当量450~500g/eq.、軟化点64℃、分子量900,三菱化学社製)、ポリカーボネート樹脂(E)として数平均分子量約1000、水酸基価約110であるプラクセルCD210(ダイセル化学社製)を用い、表1にしたがい、接着剤主剤を調製した。
接着剤硬化剤のポリイソシアネート(B)として、ヌレートタイプのヘキサメチレンジイソシアネート スミジュールN3300(住友バイエルウレタン社製)を使用した。
表1、表2に示す配合で、ポリエステルポリウレタンポリオール樹脂、エポキシ樹脂及びポリカーボネート樹脂を含有する主剤、硬化剤を一括混合して、実施例接着剤1~7、比較例接着剤1~3を調製した。尚、表中の配合量は固形分質量部であり、硬化剤の配合量は、主剤100質量部に対する配合量である。
原反として125μm厚のPETフィルム(東レ(株)X10S)を用い、上記の各接着剤組成物を5~6g/m2(乾燥質量)に塗装して、貼合用フィルムとして25μm厚のフッ素フィルム(旭硝子(株)アフレックス25PW)を用い、評価サンプルを得た。評価サンプルは、40℃、24時間、エージングした後、評価に供した。
原反として、125μm厚のPETフィルム(東レ(株)X10S)を用い、上記の各接着剤組成物を5~6g/m2(乾燥質量)に塗装して、貼合用フィルムとして25μm厚のフッ素フィルム(旭硝子(株)アフレックス25PW)を用い、評価用サンプルを得た。評価用サンプルは、40℃、24時間、エージングした後、評価に供した。
接着力:40℃、24時間のエージング工程を経て得られた評価サンプルについて、引っ張り試験機(SHIMADZU社製;AGS500NG)で、剥離速度スピード300mm/minでの強度(N/15mm、T型剥離)を接着力として評価した。初期(エージング後)、及び、121℃℃100%環境下の25時間、50時間、75時間暴露後の接着力に測定した。
初期強度:初期の接着力を下記の基準にて評価した。
◎:7.0N/15mm以上、
○:6.0N/15mm以上7.0N/15mm未満、
△:5.0N/15mm以上6.0N/15mm未満、
×:5.0 N/15mm未満
耐湿熱性:初期の接着力に対する121℃100%75時間後の接着力の保持率を、下記の基準にて評価した。
◎:80%以上、
○:60%以上80%未満、
△:40%以上60%未満、
×:40%未満
Claims (15)
- ポリエステルポリウレタンポリオール(A1)、ポリエステルポリオール(A2)、水酸基含有(メタ)アクリル樹脂(A3)及び水酸基含有水酸基含有フッ素樹脂(A4)から選ばれる1種以上の水酸基含有樹脂(A)、ポリイソシアネート(B)、及び環状アミド化合物(C)を必須成分とすることを特徴とする太陽電池バックシート用接着剤。
- 更にエポキシ樹脂(D)及び/又はポリカーボネートジオール(E)を含有する請求項1に記載の太陽電池バックシート用接着剤。
- 前記樹脂(A)及び環状アミド化合物(C)を必須成分とするポリオール組成物(X)と、ポリイソシアネート(B)とから構成される2液混合接着剤である請求項1記載の太陽電池バックシート用接着剤。
- 前記ポリオール混合物(X)が、水酸基含有樹脂(A)及び環状アミド化合物(C)に加え、更にエポキシ樹脂(D)及び/又はポリカーボネートジオール(E)を含有する請求項3記載の太陽電池バックシート用接着剤。
- 前記環状アミド化合物(C)が、δ-バレロラクタム、ε-カプロラクタム、ω-エナントールラクタム、η-カプリルラクタム、及び、β-プロピオラクタムからなる群から選ばれる1種以上である請求項1記載の太陽電池バックシート用接着剤。
- 水酸基含有樹脂(A)がポリエステルポリウレタン樹脂(A1)であって、かつ、該ポリエステルポリウレタン樹脂(A1)が、分子内に分岐構造を有し、重量平均分子量(Mw)が25,000~200,000の範囲であり、かつ、分子量分布(Mw/Mn)が2.5以上であるポリエステルポリウレタンポリオールである請求項1記載の太陽電池バックシート用接着剤。
- 水酸基含有樹脂(A)がポリエステル樹脂(A2)であって、かつ、該ポリエステル樹脂(A2)が、分子内に分岐構造を有し、重量平均分子量(Mw)が10,000~100,000の範囲、分子量分布(Mw/Mn)が3.0~4.7の範囲にあるポリエステルポリオールである請求項1記載の太陽電池バックシート用接着剤。
- ポリイソシアネート(B)が、3官能以上のポリイソシアネート化合物である請求項1記載の太陽電池バックシート用接着剤。
- 前記環状アミド化合物(C)の含有量が、水酸基含有樹脂(A)100質量部に対して0.05~10質量部となる割合である請求項1記載の太陽電池バックシート用接着剤。
- エポキシ樹脂(D)の配合割合が、樹脂(A)100質量部に対して1~20質量部となる割合である請求項2記載の太陽電池バックシート用接着剤。
- ポリカーボネートジオール(E)の配合割合が、水酸基含有樹脂(A)100質量部に対して1~20質量部となる割合である請求項2記載の太陽電池バックシート用接着剤。
- ポリエステルポリウレタンポリオール(A1)、ポリエステルポリオール(A2)、水酸基含有(メタ)アクリル樹脂(A3)、及び水酸基含有水酸基含有フッ素樹脂(A4)から選ばれる1種以上の水酸基含有樹脂(A)及び環状アミド化合物(C)を必須成分とする太陽電池バックシート接着剤用ポリオール組成物。
- 前記ポリオール混合物(X)中の前記環状アミド化合物(C)の含有量が、水酸基含有樹脂(A)100質量部に対して0.05~10質量部となる割合である請求項12記載の太陽電池バックシート接着剤用ポリオール組成物。
- 第一の基材シート、接着層、第二の基材シートの順に積層されたラミネートフィルムであって、前記接着層が請求項1~11の何れかに記載の太陽電池バックシート用接着剤の硬化物から構成されていることを特徴とする太陽電池バックシート。
- 太陽電池セルとその吸光側表面に表面保護基材、太陽電池セルの背面側に請求項14記載のバックシートが配設され、その表面保護基材とバックシートとの間隙を太陽電池セル用封止材で封止された構成を有することを特徴とする太陽電池モジュール。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016534498A JPWO2016010132A1 (ja) | 2014-07-18 | 2015-07-17 | 太陽電池バックシート用接着剤、太陽電池バックシート接着剤用ポリオール組成物、太陽電池バックシート、及び太陽電池モジュール |
| CN201580038830.6A CN106661417A (zh) | 2014-07-18 | 2015-07-17 | 太阳能电池背板用粘接剂、太阳能电池背板粘接剂用多元醇组合物、太阳能电池背板和太阳能电池模块 |
| US15/327,199 US20170179309A1 (en) | 2014-07-18 | 2015-07-17 | Adhesive for solar-cell back sheet, polyol composition for solar-cell back sheet adhesive, solar-cell back sheet, and solar cell module |
| EP15822046.7A EP3170878A4 (en) | 2014-07-18 | 2015-07-17 | Adhesive for solar-cell backsheet, polyol composition for solar-cell backsheet adhesive, solar-cell backsheet, and solar cell module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014147723 | 2014-07-18 | ||
| JP2014-147723 | 2014-07-18 |
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| WO2016010132A1 true WO2016010132A1 (ja) | 2016-01-21 |
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Country Status (6)
| Country | Link |
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| US (1) | US20170179309A1 (ja) |
| EP (1) | EP3170878A4 (ja) |
| JP (1) | JPWO2016010132A1 (ja) |
| CN (1) | CN106661417A (ja) |
| TW (1) | TW201610058A (ja) |
| WO (1) | WO2016010132A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2018117082A1 (ja) * | 2016-12-20 | 2019-03-14 | Dic株式会社 | ポリエステルポリオール、反応型接着剤、および積層体 |
| KR20190097954A (ko) * | 2018-02-13 | 2019-08-21 | 주식회사 엘지화학 | 반도체용 접착 필름 |
| JP2020176226A (ja) * | 2019-04-19 | 2020-10-29 | 東洋インキScホールディングス株式会社 | 接着剤組成物及びその製造方法、積層フィルム並びに包装体 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6057041B1 (ja) * | 2015-03-13 | 2017-01-11 | Dic株式会社 | ポリオール組成物、接着性コーティング剤、その硬化物、接着性シート、及び太陽電池モジュール |
| CN108695402A (zh) * | 2018-05-30 | 2018-10-23 | 苏州中来光伏新材股份有限公司 | 一种太阳能电池背板及其制备方法 |
| JPWO2020095484A1 (ja) * | 2018-11-06 | 2021-02-25 | Dic株式会社 | 粘着剤組成物及び表面保護フィルム |
| CN109735279B (zh) * | 2018-12-11 | 2021-04-20 | 上海维凯光电新材料有限公司 | 用于太阳能背板的抗黄变粘合剂 |
| EP4155333A1 (en) * | 2021-09-23 | 2023-03-29 | Bostik SA | Adhesive compositions, layered articles and photovoltaic sheets |
| CN114685751A (zh) * | 2022-04-12 | 2022-07-01 | 浙江晶科能源有限公司 | 化合物及其制备方法、光伏组件 |
| TWI848280B (zh) * | 2022-04-15 | 2024-07-11 | 國精化學股份有限公司 | 聚偏二氟乙烯材黏合用的聚氨酯黏合劑 |
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| KR20190097954A (ko) * | 2018-02-13 | 2019-08-21 | 주식회사 엘지화학 | 반도체용 접착 필름 |
| KR102215110B1 (ko) * | 2018-02-13 | 2021-02-09 | 주식회사 엘지화학 | 반도체용 접착 필름 |
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Also Published As
| Publication number | Publication date |
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| JPWO2016010132A1 (ja) | 2017-04-27 |
| US20170179309A1 (en) | 2017-06-22 |
| TW201610058A (zh) | 2016-03-16 |
| EP3170878A1 (en) | 2017-05-24 |
| CN106661417A (zh) | 2017-05-10 |
| EP3170878A4 (en) | 2018-04-04 |
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