WO2019097887A1 - 接着剤、積層体、電池外装用包装材、電池ケース、及び電池ケースの製造方法 - Google Patents
接着剤、積層体、電池外装用包装材、電池ケース、及び電池ケースの製造方法 Download PDFInfo
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- WO2019097887A1 WO2019097887A1 PCT/JP2018/037239 JP2018037239W WO2019097887A1 WO 2019097887 A1 WO2019097887 A1 WO 2019097887A1 JP 2018037239 W JP2018037239 W JP 2018037239W WO 2019097887 A1 WO2019097887 A1 WO 2019097887A1
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- Prior art keywords
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- adhesive
- polyurethane
- component
- polyol
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- 238000000034 method Methods 0.000 title description 14
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- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 5
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- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 4
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- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 4
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- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- YLHXLHGIAMFFBU-UHFFFAOYSA-N methyl phenylglyoxalate Chemical compound COC(=O)C(=O)C1=CC=CC=C1 YLHXLHGIAMFFBU-UHFFFAOYSA-N 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- NXPPAOGUKPJVDI-UHFFFAOYSA-N naphthalene-1,2-diol Chemical compound C1=CC=CC2=C(O)C(O)=CC=C21 NXPPAOGUKPJVDI-UHFFFAOYSA-N 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- UMRZSTCPUPJPOJ-KNVOCYPGSA-N norbornane Chemical compound C1C[C@H]2CC[C@@H]1C2 UMRZSTCPUPJPOJ-KNVOCYPGSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 230000003204 osmotic effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- HPAFOABSQZMTHE-UHFFFAOYSA-N phenyl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)C1=CC=CC=C1 HPAFOABSQZMTHE-UHFFFAOYSA-N 0.000 description 1
- LYXOWKPVTCPORE-UHFFFAOYSA-N phenyl-(4-phenylphenyl)methanone Chemical compound C=1C=C(C=2C=CC=CC=2)C=CC=1C(=O)C1=CC=CC=C1 LYXOWKPVTCPORE-UHFFFAOYSA-N 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 150000003097 polyterpenes Chemical class 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- 125000005628 tolylene group Chemical group 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/095—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
-
- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6576—Compounds of group C08G18/69
- C08G18/6582—Compounds of group C08G18/69 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6588—Compounds of group C08G18/69 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/6715—Unsaturated monofunctional alcohols or amines
-
- 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
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/757—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09J175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an adhesive for laminating a metal foil and a resin film, a laminate, a battery case packaging material, a battery case, and a method of manufacturing the battery case.
- a compound containing lithium as a positive electrode material and a carbon material such as graphite or coke as a negative electrode material are used.
- an electrolytic solution in which a lithium salt such as LiPF 6 or LiBF 4 is dissolved as an electrolyte in an aprotic solvent having an osmotic power such as propylene carbonate or ethylene carbonate between the positive electrode and the negative electrode, or the aforementioned electrolytic solution and an electrolyte layer comprising a polymer gel impregnated with
- a packaging material for a battery exterior a laminate is known in which a heat resistant resin stretched film layer and an aluminum foil layer as an outer layer and a thermoplastic resin unstretched film layer as an inner layer are sequentially laminated.
- a solvent having a penetrating power such as an electrolyte passes through a film layer to be a sealant in the packaging material for a battery exterior
- an aluminum foil layer is produced.
- the laminate strength between the resin film layers may be reduced, which may cause the electrolytic solution to leak.
- an adhesive layer containing an aluminum foil layer and an inner layer a resin containing a functional group having reactivity with isocyanate, such as an acid anhydride group, a carboxy group, and a hydroxyl group, and a polyfunctional isocyanate compound.
- a battery packaging material has been developed that adheres through the
- Patent Document 1 discloses a modified polyolefin resin obtained by grafting an ethylenically unsaturated carboxylic acid or an anhydride thereof onto a homopolymer of propylene or a copolymer of propylene and ethylene, and a polyfunctional isocyanate compound.
- a method of forming an adhesive layer using a solvent type adhesive dissolved or dispersed in a solvent is described.
- Patent Document 2 describes an adhesive composition containing a polyolefin polyol and a polyfunctional isocyanate curing agent as essential components and further containing a thermoplastic elastomer and / or a tackifier.
- An adhesive composition which comprises a curing agent comprising one or more polyisocyanate compounds selected from the group consisting of isocyanate, crude diphenylmethane diisocyanate and polymeric diphenylmethane diisocyanate.
- the modified polyolefin resin described in Patent Document 1 changes with time during long-term storage and dissolution in a solvent, and the operability at the time of coating often becomes unstable. Moreover, there existed a possibility that variation might arise in the adhesive force of the adhesive layer formed. Furthermore, there is also a possibility that it may be inferior to the adhesive force in the high temperature which assumed vehicle use etc.
- Patent Document 2 and Patent Document 3 have relatively stable operability and adhesion at the time of application. However, when the adhesive layer is in contact with the electrolytic solution passing through the film layer to be the sealant in the packaging material for battery exterior, the adhesive strength is reduced, and the quality of the battery is degraded.
- Patent Documents 1 to 3 have a problem that when the aluminum foil layer and the film layer are bonded via the adhesive layer, it takes a long time to cure the adhesive layer.
- this invention makes it a subject to provide the adhesive for lamination of metal foil and a resin film which can manufacture the packaging material for battery exteriors whose hardening time is short and was excellent in heat resistance and electrolytic solution resistance.
- Another object of the present invention is to provide a laminate excellent in heat resistance and electrolyte resistance, a packaging material for electric packaging, and a battery case, which are manufactured using the adhesive.
- the present invention includes the following aspects.
- the polyurethane polyol (a1) is (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, and (3) a polyisocyanate compound.
- the polyurethane acrylate (a2) is (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (4) 2)
- the carboxy group-containing polyurethane (a3) is (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (5)
- [7] The composition according to any one of [1] to [6], wherein the (C) contains an active hydrogen group and an aliphatic monomer (c1) having one ethylenic unsaturated bond. adhesive.
- a packaging material for a battery exterior comprising the laminate according to any one of [10] to [12].
- a battery case comprising the battery exterior packaging material according to [13].
- a method for producing a battery case including deep drawing or stretch forming of the packaging material for a battery exterior according to [13].
- the present invention provides an adhesive for laminating a metal foil and a resin film, which can produce a battery case packaging material having a short curing time and excellent heat resistance and electrolytic solution resistance. Moreover, the laminated body excellent in heat resistance and electrolyte resistance manufactured using this adhesive agent, the packaging material for electric exteriors, and a battery case are provided.
- the present invention provides an adhesive for laminating metal foil and resin film.
- the adhesive of the present embodiment has (A) 1 to 20% by mass of polyurethane having at least one functional group selected from the group consisting of hydroxyl group, acryloyl group, and carboxy group, and (B) active hydrogen group. 30% to 90% by mass of a monomer having two or more ethylenically unsaturated bonds, 1 to 55% by mass of an aliphatic monomer having one (C) ethylenically unsaturated bond, (D) a polyisocyanate It contains 1 to 15% by mass of the compound, and 0.5 to 5% by mass of (E) a photoinitiator.
- the (B) has at least one cyclic structure selected from the group consisting of an alicyclic structure, an aromatic ring structure and a heterocyclic structure. Further, (C) has at least one group selected from the group consisting of a chain hydrocarbon group having 1 to 12 carbon atoms and an alicyclic group having 5 to 10 carbon atoms.
- adheresive layer refers to an adhesive layer obtained by curing the adhesive of the present embodiment.
- the component (A) is a polyurethane having at least one functional group selected from the group consisting of a hydroxyl group, an acryloyl group, and a carboxy group.
- the number average molecular weight of the polyurethane is preferably 1,000 to 50,000, and more preferably 3,000 to 30,000.
- the polyurethane as component (A) may be a polyurethane having a hydroxyl group as a functional group (hereinafter referred to as "hydroxyl-containing polyurethane").
- hydroxyl-containing polyurethane As a hydroxyl group containing polyurethane, polyurethane polyol (Hereinafter, it may be mentioned “polyurethane polyol (a1).") Is mentioned.
- the polyurethane polyol (a1) is obtained by copolymerizing (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, and (3) a polyisocyanate compound. You can get it.
- the polyurethane polyol (a1) is a copolymer of (1) polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, and (3) a polyisocyanate compound It can be said that
- the polyol is (1a) a polyolefin polyol having no alicyclic structure, and (1b) a polyester polyol having a structural unit derived from a hydrogenated dimer acid and a structural unit derived from a hydrogenated dimer diol It is preferable that it is at least 1 sort (s) selected from the group which consists of ,.
- the polyolefin polyol which does not contain an alicyclic structure may contain a polyolefin skeleton formed by polymerizing or copolymerizing one or more olefins, and two or more hydroxyl groups, and may not have an alicyclic structure.
- a polyolefin skeleton formed by polymerizing or copolymerizing one or more olefins, and two or more hydroxyl groups and may not have an alicyclic structure.
- polyolefin polyols containing no alicyclic structure examples include polydiene polyols such as polybutadiene polyols and polyisoprene polyols; graft polymers of these polydiene polyols and polyolefins; polydiene polyols mentioned above, graft polymers Etc .; and the like. These may be used alone or in combination of two or more. From the viewpoint of the electrolytic solution resistance of the adhesive layer, it is preferable that the polyolefin polyol not containing an alicyclic structure does not substantially contain an unsaturated hydrocarbon structure in the structure.
- the hydrogenated substance of the various polyolefin polyol mentioned above is mentioned, for example.
- these commercially available products include GI-1000, GI-2000, GI-3000 (manufactured by Nippon Soda Co., Ltd.), and Epol (manufactured by Idemitsu Kosan Co., Ltd.).
- the number average molecular weight of the polyolefin polyol not containing an alicyclic structure is preferably 1,000 to 10,000. If the number average molecular weight is 1,000 or more, the adhesive force of the adhesive layer is unlikely to be lowered even when in contact with the electrolytic solution. In addition, when the number average molecular weight is 10000 or less, the solubility of the polyurethane polyol (a1) becomes good, and the operability at the time of applying the adhesive becomes good.
- the number average molecular weight in the present specification is measured at room temperature under the following conditions using gel permeation chromatography (Shodex GPC System-11, “Shodex” (registered trademark) manufactured by Showa Denko KK), and polystyrene is standard polystyrene. It is a value determined using a calibration curve.
- polyester polyol having a structural unit derived from hydrogenated dimer acid and a structural unit derived from hydrogenated dimer diol
- dimer acid refers to a dimer acid obtained by reacting a C 14-22 fatty acid having 2 to 4 ethylenic unsaturated bonds at the unsaturated bonding site.
- hydrogenated dimer acid refers to a saturated dicarboxylic acid obtained by hydrogenating the carbon-carbon double bond of the dimer acid.
- EMPOL 1008 and EMPOL 1062 made by BASF Corporation
- hydrogenated dimer diol refers to a dimer obtained by reducing at least one member selected from the group consisting of the above dimer acid, the above hydrogenated dimer acid and its lower alcohol ester in the presence of a catalyst
- the main component is a diol component in which the carboxylic acid or carboxylate moiety of the acid is an alcohol. If the raw material has a carbon-carbon double bond, the double bond is further hydrogenated.
- Sovermol 908 made by BASF Corporation
- PRIPOL2033 made by Croda
- the polyester polyol having a constitutional unit derived from hydrogenated dimer acid and a constitutional unit derived from hydrogenated dimer diol comprises an acid component containing the hydrogenated dimer acid as an essential component, and the hydrogenated dimer diol as an essential component.
- the component polyol component can be produced by condensation in the presence of an esterification catalyst. Alternatively, it may also be produced by transesterification of a lower alkyl ester of an acid containing a hydrogenated dimer acid as an essential component and a polyol component containing the above hydrogenated dimer diol as an essential component in the presence of a transesterification catalyst. Can.
- a hydrocarbon having a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups in combination A saturated or unsaturated cyclic hydrocarbon structure and a hydrocarbon having two or more hydroxyl groups in combination are saturated or unsaturated
- the compound is not particularly limited as long as it is a compound having a cyclic hydrocarbon structure of and a 2 or more hydroxyl group, and the structure of the other part is a hydrocarbon.
- saturated cyclic hydrocarbon structure examples include cycloalkane structures such as cyclopentane ring, cyclohexane ring and cycloheptane ring; and saturated alicyclic structures having a cross-linked structure such as norbornane, adamantane and tricyclodecane.
- saturated cyclic hydrocarbon structure examples include cycloalkanediols such as cyclopentanediol and cyclohexanediol; and saturated alicyclic ones having a crosslinked structure such as norbornanediol and adamantanediol.
- Diol saturated alicyclic triol having a crosslinked structure such as adamantanetriol
- saturated alicyclic dimethanol such as cyclohexanedimethanol, tricyclodecanedimethanol
- the hydrocarbon having both a saturated cyclic hydrocarbon structure and two or more hydroxyl groups is preferably one containing a saturated alicyclic structure having a cross-linked structure, and preferred examples thereof include norbornane diol, adamantane diol, adamantane triol, Tricyclodecane dimethanol etc. are mentioned.
- Examples of commercially available products thereof include adamantane triol (manufactured by Idemitsu Kosan, manufactured by Mitsubishi Gas Chemical Co., Ltd.), TCD alcohol DM (manufactured by Oxea Corporation), and the like.
- unsaturated cyclic hydrocarbon structures include cyclopentene ring, cyclohexene ring, cycloheptene ring, cycloalkene structure such as [4n] annulene; conjugated ring structure such as benzene, naphthalene, anthracene, azulene, and [4n + 2] annulene; Unsaturated alicyclic structures having a crosslinked structure such as pentadiene; and the like.
- hydrocarbon having an unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups examples include cyclohexene diol, biphenol, bisphenol, naphthalene diol, dicyclopentadienyl dimethanol and the like. These may be used alone or in combination of two or more.
- the hydrocarbon having a combination of unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups is preferably bisphenol, and preferred specific examples include bisphenol A, bisphenol B, bisphenol C, bisphenol E, bisphenol F, bisphenol G And bisphenol Z, and more preferably bisphenol A.
- the polyisocyanate compound is not particularly limited as long as it is a compound containing two or more isocyanato groups, or a multimer thereof.
- saturated oils such as 1,4-cyclohexane diisocyanate, isophorone diisocyanate, methylene bis (4-cyclohexylisocyanate), 1,3-bis (isocyanatomethyl) cyclohexane, 1,4-bis (isocyanatomethyl) cyclohexane, norbornane diisocyanate, etc.
- Cyclic diisocyanates aromatic diisocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, diphenylmethane-4,4'-diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate; Aliphatic diisocyanates such as hexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, 2,2,4-trimethylhexane methylene diisocyanate DOO; etc., as well as allophanatization multimers of the exemplified compounds, isocyanurate compound, and biuret-modified products and the like.
- the polyisocyanate compound is preferably a saturated alicyclic diisocyanate, and preferred specific examples thereof include 1,4-cyclohexane diisocyanate, isophorone diisocyanate, methylenebis (4-cyclohexylisocyanate), and 1,3-bis (isocyanatomethyl). Examples thereof include cyclohexane, 1,4-bis (isocyanatomethyl) cyclohexane, norbornane diisocyanate and the like. More preferably, isophorone diisocyanate, methylene bis (4-cyclohexyl isocyanate), norbornane diisocyanate and the like can be mentioned. As these commercial products, Desmodur I, Desmodur W (each manufactured by Bayer), IPDI, H12MDI (each manufactured by Degussa), etc. may be mentioned.
- the copolymerization of (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, and (3) a polyisocyanate compound is carried out by a known method of urethanization. be able to. From the viewpoint of shortening the reaction time, the copolymerization is preferably performed in the presence of a known urethanization catalyst such as dibutyltin dilaurate and dioctyltin dilaurate. For example, the method described in International Publication WO 2016/021279 can be used.
- the polyurethane as component (A) may be a polyurethane having an acryloyl group as a functional group (hereinafter referred to as "acryloyl group-containing polyurethane”).
- the acryloyl group-containing polyurethane includes polyurethane acrylate (hereinafter sometimes referred to as “polyurethane acrylate (a2)").
- the polyurethane acrylate (a2) is (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (4) one or more It can obtain by copolymerizing (meth) acrylate which has a hydroxyl group of That is, the polyurethane acrylate (a2) is a (1) polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (4) 1 It can also be said that the copolymer is a (meth) acrylate copolymer having at least one hydroxyl group.
- (meth) acrylate means methacrylate or acrylate.
- the (meth) acrylate having one or more hydroxyl groups is not particularly limited as long as it has one or more hydroxyl groups and has a (meth) acrylate skeleton.
- Examples of (meth) acrylates having one or more hydroxyl groups include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypentyl (meth) acrylate, hydroxyhexyl (Meth) acrylate, hydroxyoctyl (meth) acrylate, pentaerythritol tri, di or mono (meth) acrylate, hydroxyalkyl (meth) acrylate such as trimethylolpropane di or mono (meth) acrylate, and the like.
- 2-hydroxyethyl (meth) acrylate and hydroxybutyl (meth) acrylate are preferable from the viewpoint of reactivity.
- the copolymerization of the acrylates can be carried out by known methods. From the viewpoint of shortening the reaction time, the copolymerization is preferably performed in the presence of a known urethanization catalyst such as dibutyltin dilaurate and dioctyltin dilaurate.
- a known urethanization catalyst such as dibutyltin dilaurate and dioctyltin dilaurate.
- the polyurethane as component (A) may be a polyurethane having a carboxy group as a functional group (hereinafter referred to as "carboxy group-containing polyurethane”).
- carboxy group-containing polyurethane may be referred to as "carboxy group-containing polyurethane (a3)".
- the carboxy group-containing polyurethane comprises (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (5) one or more of It can be obtained by copolymerizing a compound having a hydroxyl group and one or more carboxy groups.
- the carboxy group-containing polyurethane comprises (1) a polyol, (2) a hydrocarbon having both a saturated or unsaturated cyclic hydrocarbon structure and two or more hydroxyl groups, (3) a polyisocyanate compound, and (5) one. It can also be said that it is a copolymer of a compound having the above hydroxyl group and one or more carboxy groups.
- a compound having one or more hydroxy groups and one or more carboxy groups is one or more hydroxy groups and one or more carboxy groups. It is not particularly limited as long as it has Examples of compounds having one or more hydroxyl groups and one or more carboxy groups include glycolic acid, 3-hydroxypropionic acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 2,2-dimethylol Aliphatic hydroxy acids such as propionic acid, 2,2-dimethylol butyric acid, malic acid, citric acid and the like. Among these, 2,2-dimethylol propionic acid and 2,2-dimethylol butyric acid are preferable from the viewpoint of reactivity.
- polyols (2) hydrocarbons having both saturated and unsaturated cyclic hydrocarbon structures and two or more hydroxyl groups, (3) polyisocyanate compounds, and (5) one or more hydroxyl groups and one or more
- the copolymerization of the compound having a carboxy group can be carried out by a known method. From the viewpoint of shortening the reaction time, the copolymerization is preferably performed in the presence of a known urethanization catalyst such as dibutyltin dilaurate and dioctyltin dilaurate.
- the content of the component (A) in the adhesive of the present embodiment is 1 to 20% by mass. By making content of (A) component into the said range, the adhesive bond layer excellent in electrolyte solution resistance can be formed. In addition, an adhesive having excellent coatability can be obtained.
- the content of the component (A) in the adhesive of the present embodiment is preferably 5 to 15% by mass.
- the component (A) one type may be used alone, or two or more types may be used in combination.
- the component (B) is a monomer having no active hydrogen group and having two or more ethylenic unsaturated bonds.
- the monomer of component (B) has at least one cyclic structure selected from the group consisting of an alicyclic structure, an aromatic ring structure and a heterocyclic structure.
- active hydrogen group means a group containing active hydrogen that can react with an isocyanato group, and specifically, it is a hydroxyl group, a carboxy group, and an amino group.
- the monomer as component (B) has at least two ethylenically unsaturated bonds, has no active hydrogen group, and is selected from the group consisting of an alicyclic structure, an aromatic ring structure and a heterocyclic structure It is not particularly limited as long as it has at least one cyclic structure.
- the ethylenically unsaturated bond of the component (B) is not particularly limited, but from the viewpoint of reactivity, those derived from a (meth) acryloyloxy group are preferable. That is, polyfunctional acrylate monomers are preferred.
- the "(meth) acryloyloxy group” means an acryloyloxy group or a methacryloyloxy group.
- cycloalkane structures such as a cyclopentane ring, a cyclohexane ring, and a cycloheptane ring; And the like.
- cycloalkane structures such as a cyclopentane ring, a cyclohexane ring, and a cycloheptane ring; And the like.
- a monomer which has such an alicyclic structure and does not have an active hydrogen group, and has two or more ethylenic unsaturated bonds tricyclodecane dimethanol diacrylate etc. are mentioned.
- Examples of commercially available products include A-DCP (manufactured by Shin-Nakamura Chemical Co., Ltd.).
- the aromatic ring structure that the monomer of component (B) may have may be a single ring or multiple rings, but a single ring aromatic ring structure such as a benzene ring is preferable.
- a monomer having such an aromatic ring structure and having no active hydrogen group and having two or more ethylenic unsaturated bonds bisphenols such as ethoxylated bisphenol A diacrylate and propoxylated bisphenol A diacrylate A diacrylate etc. are mentioned.
- the heterocyclic structure which the monomer of (B) component may have may be an aliphatic heterocyclic ring or a heteroaromatic ring, but an aliphatic heterocyclic ring is preferable.
- the aliphatic heterocycle include a dioxane ring and an isocyanurate ring.
- ethoxylated isocyanurate triacrylate ethoxylated isocyanurate triacrylate, ⁇ -caprolactone modified tris- (2-acryloxyethyl) ) Isocyanurate and the like.
- those having an alicyclic structure are preferable from the viewpoint of resistance to the electrolytic solution, and among these, tricyclodecanedimethanol diacrylate is more preferable.
- the content of the component (B) in the adhesive of the present embodiment is 30 to 90% by mass. By making content of (B) component into the said range, the adhesive bond layer excellent in heat resistance and electrolyte solution resistance can be formed. In addition, an adhesive having excellent coatability can be obtained.
- the content of the component (B) in the adhesive of the present embodiment is preferably 45 to 75% by mass. As the component (B), one type may be used alone, or two or more types may be used in combination.
- the component (C) is an aliphatic monomer having one ethylenically unsaturated bond.
- the ethylenically unsaturated aliphatic monomer as the component (C) is at least one selected from the group consisting of a chain hydrocarbon group having 1 to 12 carbon atoms and an alicyclic group having 5 to 10 carbon atoms. It has a group of species.
- the aliphatic monomer having one ethylenic unsaturated bond as the component (C) is an aliphatic monomer having one ethylenic unsaturated bond, and is a chain carbonization having 1 to 12 carbon atoms. It is not particularly limited as long as it has at least one group selected from the group consisting of a hydrogen group and an alicyclic group having 5 to 10 carbon atoms.
- An acryloyl group is mentioned as a group containing the ethylenically unsaturated bond which the aliphatic monomer which has one ethylenically unsaturated bond of (C) component may have.
- a compound containing an acryloyl group includes a compound containing an acrylamide group and a compound containing an acryloyloxy group.
- the chain hydrocarbon group having 1 to 12 carbon atoms which may be possessed by the aliphatic monomer having one ethylenic unsaturated bond of component (C) is branched even if it is linear or linear. May be As a linear hydrocarbon group, a linear alkyl group and a linear alkylene group can be mentioned.
- branched hydrocarbon groups include isopropyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, ethylhexyl, branched nonyl and the like.
- the alicyclic group having 5 to 10 carbon atoms which the aliphatic monomer having one ethylenically unsaturated bond of component (C) may have is a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group And the like; cycloalkyl groups having a cross-linked structure such as isobonyl group and dicyclopentenyl group; and the like.
- these chain hydrocarbon group or alicyclic group one or more hydrogen atoms may be substituted by a substituent.
- the above-mentioned active hydrogen group, the phosphorus containing group mentioned later, etc. are mentioned.
- the component (C) contains an active hydrogen group and is an aliphatic monomer (c1) having one ethylenically unsaturated bond, an aliphatic monomer containing phosphorus, and having one ethylenically unsaturated bond ( and at least one member selected from the group consisting of c2) and aliphatic monomers (c0) other than (c1) and (c2) and having one ethylenically unsaturated bond.
- the component (C) contains an active hydrogen group and is an aliphatic monomer having one ethylenically unsaturated bond (c1), and contains phosphorus and is an aliphatic monomer having one ethylenically unsaturated bond It is preferable to contain the aliphatic monomer (c0) which has one ethylenically unsaturated bond other than (c2).
- the component (c0) is an aliphatic monomer having one active hydrogen group and one phosphorus-free ethylenic unsaturated bond.
- component (c0) examples include ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, 2-ethylhexyl Aliphatic acrylates such as meta) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, branched nonyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate; cyclohexyl (meth) Alicyclic acrylates such as acrylate, isobornyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentanyl (meth) acrylate; and the like. These may be used alone or
- the component (C) preferably contains an active hydrogen group and contains an aliphatic monomer (c1) having one ethylenically unsaturated bond.
- the active hydrogen group contained in the component (c1) is preferably a hydroxyl group. Examples of the component (c1) include hydroxyl group-containing acrylates and hydroxyl group-containing acrylamides.
- hydroxyl group-containing acrylate examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypentyl (meth) acrylate, hydroxyhexyl (meth) acrylate and hydroxyoctyl Examples include hydroxyalkyl (meth) acrylates such as (meth) acrylates.
- Specific examples of the hydroxyl group-containing acrylamide include N-hydroxymethyl acrylamide, hydroxyalkyl acrylamide such as N-hydroxyethyl acrylamide, and the like. These may be used alone or in combination of two or more. Among these, N-hydroxyethyl acrylamide is preferable from the viewpoint of adhesion to a metal substrate.
- the component (C) preferably contains phosphorus and contains an aliphatic monomer (c2) having one ethylenically unsaturated bond.
- a phosphorus containing group which (c2) component contains a phosphoric acid group is preferable.
- the component (c2) include aliphatic monomers containing an acryloyloxy group and a phosphate group.
- Specific examples of the aliphatic monomer having such a structure include phosphoric acid (acryloyloxy) alkyl such as 2-acryloyloxyethyl acid phosphate, 2-acryloyloxybutyl acid phosphate and the like. These may be used alone or in combination of two or more.
- the component (C) contains at least one selected from the group consisting of the components (c0), (c1), and (c2), but preferably contains two or more of them. It is more preferable to include.
- the component (c1): the component (c2) is 3: 1 to 1: 3.
- the content of the component (C) in the adhesive of the present embodiment is 1 to 55% by mass. By making content of (C) component into the said range, the adhesive bond layer excellent in heat resistance and electrolyte resistance can be formed. In addition, an adhesive having excellent coatability can be obtained.
- the content of the component (C) in the adhesive of the present embodiment is preferably 10 to 30% by mass.
- the content of the component (C) is the total content of the components (c0), (c1) and (c2).
- Component (D) is a polyisocyanate compound.
- the polyisocyanate compound as the component (D) is a compound containing two or more isocyanato groups, or a multimer thereof, provided that it does not fall under the components (A), (B) or (C), There is no particular restriction.
- a polyisocyanate compound the thing similar to the polyisocyanate compound mentioned by said " ⁇ (A) component> (polyurethane which has a hydroxyl group) (3) polyisocyanate compound""is mentioned.
- polyisocyanate compound as the component (D) include aliphatic diisocyanates such as hexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, 2,2,4-trimethylhexanemethylene diisocyanate; Saturated alicyclic diisocyanates such as cyclohexane diisocyanate, isophorone diisocyanate, methylene bis (4-cyclohexylisocyanate), 1,3-bis (isocyanatomethyl) cyclohexane, 1,4-bis (isocyanatomethyl) cyclohexane, norbornane diisocyanate, etc .; Isocyanate, 4,4'-diphenylmethane diisocyanate, polymethylene polyphenylisocyanate, xylylene diisocyanate, paraphenylenediiso And aromatic diisocyanates such as cyanate and 1,5-naphthalene di
- allophanatized multimers isocyanurate compounds, biuret modified products of the compounds exemplified above and the like can be mentioned. These may be used alone or in combination of two or more. Among these, isocyanurate of hexamethylene diisocyanate is preferable from the viewpoint of adhesion to a metal substrate.
- the content of the component (D) in the adhesive of the present embodiment is 1 to 15% by mass. By making content of (D) component into the said range, the adhesive bond layer excellent in heat resistance and electrolyte resistance can be formed.
- the content of the component (D) in the adhesive of the present embodiment is preferably 1 to 10% by mass.
- Component (E) is a photoinitiator.
- a photoinitiator as (E) component a well-known radical photopolymerization initiator can be used without a restriction
- the photo radical polymerization initiator refers to a compound which generates a radical upon irradiation with active energy rays such as ultraviolet rays, visible rays and electron beams.
- the photoinitiator as the component (E) is preferably a photo radical polymerization initiator that generates a radical upon irradiation with ultraviolet light.
- component (E) examples include benzyl dimethyl ketal, benzyl, benzoin, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropane- 1-one, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, oligo [2-hydroxy-2-methyl-1- [4-1- (methyl vinyl) ) Phenyl] propanone, 2-hydroxy-1- [4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] -phenyl] -2-methylpropan-1-one, 2-methyl-1- [4 -(Methylthio)] phenyl] -2-morpholinopropan-1-o , 2-benzyl-2-dimethylamino-1- (4-morpholinophen
- the content of the component (E) in the adhesive of the present embodiment is 0.5 to 5% by mass. By setting the content of the component (E) within the above range, the curability of the adhesive becomes good.
- the content of the component (E) in the adhesive of the present embodiment is preferably 1 to 3% by mass.
- the adhesive of the present embodiment may contain other components in addition to the components (A) to (E).
- the other components are not particularly limited, but include solvents, reaction accelerators, tackifiers, plasticizers, and ethylenically unsaturated monomers other than (A) to (C).
- the adhesive of the present embodiment may contain a solvent.
- the solvent is not particularly limited as long as it can dissolve or disperse the components (A) to (E).
- the solvent include aromatic organic solvents such as toluene and xylene; alicyclic organic solvents such as cyclohexane, methylcyclohexane and ethylcyclohexane; aliphatic organic solvents such as n-hexane and n-heptane, and ethyl acetate And ester-based organic solvents such as propyl acetate and butyl acetate; ketone-based organic solvents such as acetone, methyl ethyl ketone and methyl butyl ketone; and the like. These may be used alone or in combination of two or more.
- the adhesive of the present embodiment may contain a reaction accelerator to accelerate the polymerization reaction of the components (A) to (D).
- the reaction accelerator is not particularly limited, and known ones can be used.
- Examples of reaction accelerators include organic tin compounds such as dioctyl tin dilaurate and dioctyl tin diacetate; 2,4,6-tris (dimethylaminomethyl) phenol, dimethyl aniline, dimethyl para toluidine, N, N-di ( ⁇ Tertiary amines such as -hydroxyethyl) -p-toluidine; metals such as neodecanoate such as zinc neodecanoate; and the like.
- One of these reaction accelerators may be used alone, or two or more thereof may be used in combination.
- the adhesive of the present embodiment may contain a tackifier.
- the tackifier is not particularly limited, and known ones can be used.
- tackifiers include polyterpene resins and rosin resins in natural systems, and aliphatic (C5) resins obtained from decomposed oil fractions of naphtha and aromatics (C9) in petroleum systems. Examples include system resins, copolymer (C5 / C9) resins, and alicyclic resins.
- the hydrogenated resin which hydrogenated the double bond part of these resin is mentioned.
- One of these tackifiers may be used alone, or two or more thereof may be used in combination.
- the adhesive of the present embodiment may contain a plasticizer.
- the plasticizer is not particularly limited, and examples thereof include liquid rubbers such as polyisoprene and polybutene, and process oils.
- the adhesive of the present embodiment may contain a thermoplastic resin such as an acid-modified polyolefin resin or a thermoplastic elastomer as long as the effects of the present invention are not impaired.
- thermoplastic resins and thermoplastic elastomers include ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, SEBS (styrene-ethylene-butylene-styrene), SEPS (styrene-ethylene-propylene-styrene), etc. Can be mentioned.
- the adhesive of the present embodiment may contain an ethylenically unsaturated monomer other than the components (A) to (C).
- the adhesive of the present embodiment can be produced by mixing the components (A) to (E), adding other components as appropriate, and mixing.
- the ratio of the number of isocyanato groups contained in the component (D) to the total number of active hydrogens contained in the adhesive (NCO / active hydrogen) is preferably 1.5 or more.
- the ratio of NCO / active hydrogen is more preferably 1.5 to 5, further preferably 2.0 to 3.0.
- the adhesive of this embodiment does not contain the component (c1) as the component (C)
- the number of active hydrogens contained in the component (A) can be considered as the number of active hydrogens contained in the adhesive.
- the adhesive of the present embodiment contains the component (c1) as the component (C), the number of isocyanato groups contained in the component (D) relative to the total number of active hydrogens contained in the component (A) and the component (c1)
- the ratio (NCO / active hydrogen) is preferably 1.5 or more.
- the ratio of NCO / active hydrogen is more preferably 1.5 to 5, further preferably 2.0 to 3.0.
- An adhesive layer excellent in heat resistance and electrolytic solution resistance can be formed as NCO / active hydrogen is in a mentioned range.
- active hydrogen means hydrogen which can react with an isocyanato group among hydrogen contained in a hydroxyl group, a carboxy group, or an amino group.
- the adhesive of the present embodiment is characterized in that an adhesive layer excellent in electrolytic solution resistance can be formed.
- the cured adhesive sheet obtained by curing the adhesive of this embodiment is immersed in an electrolytic solution solvent (ethylene carbonate / diethylene carbonate, mass ratio 50/50) at 85 ° C. for 24 hours, and then 23
- an electrolytic solution solvent ethylene carbonate / diethylene carbonate, mass ratio 50/50
- the tensile strength at the time of performing a tensile strength test under conditions of a test speed of 100 mm / min in an atmosphere of ° C ⁇ 50% RH is 5 MPa or more.
- the tensile strength under the above conditions is more preferably 10 MPa or more.
- the upper limit of the tensile strength under the above conditions is not particularly limited, but may be 50 MPa or less, 40 MPa or less, or the like.
- the method for producing a cured adhesive sheet to be subjected to the tensile strength test is as follows. Both sides of a 40 mm ⁇ 80 mm ⁇ 300 ⁇ m frame mold are sandwiched between release PET films, and a resin is injected into the inside.
- the adhesive resin is obtained by irradiating an ultraviolet ray of UVA wavelength (320 to 390 nm) on one side with an integrated light quantity of 6,000 mJ / cm 2 and irradiating the total of 12,000 mJ / cm 2 to cure the adhesive.
- the cured product is cut into a shape of 40 mm ⁇ 15 mm ⁇ 300 ⁇ m.
- the adhesive of the present embodiment has good coatability to a metal foil, and can form an adhesive layer excellent in heat resistance and electrolyte resistance between the metal foil and the resin film. Therefore, it can be used suitably for manufacture of packaging materials for battery exteriors, such as a lithium ion battery.
- a metal foil and a resin film are laminated via an adhesive layer formed by curing the adhesive of the above-mentioned embodiment (hereinafter sometimes simply referred to as "the present adhesive").
- the present adhesive the adhesive of the above-mentioned embodiment
- the laminated body of this embodiment can be suitably used for manufacture of the packaging material for battery exteriors mentioned later.
- the metal foil plays a role of a barrier to water vapor and the like in the battery packaging material described later.
- a metal foil which has such a property aluminum foil is preferable.
- an O material (soft material) of a pure aluminum type or an aluminum-iron type alloy is generally used.
- the thickness of the metal foil is not particularly limited, but is preferably about 10 to 100 ⁇ m in order to ensure the processability and the barrier property to prevent the infiltration of oxygen and moisture into the package. When the thickness of the metal foil is 10 ⁇ m or more, breakage of the metal foil at the time of molding and generation of pin holes are suppressed. Therefore, when used as a battery exterior packaging material, the risk of oxygen and moisture entering the inner layer is reduced.
- the thickness of the metal foil is 100 ⁇ m or less, the thickness and mass of the packaging material are maintained in an appropriate range when used as a packaging material for a battery exterior.
- a metal foil having a thickness of about 30 to 50 ⁇ m is used, and one having a thickness of 40 to 50 ⁇ m is preferably used.
- the metal foil may be subjected to a chemical conversion treatment such as an undercoat treatment with a silane coupling agent or a titanium coupling agent, a chromate treatment, or the like in order to improve adhesion to a resin film and corrosion resistance.
- the resin film has a heat sealability in the packaging material for battery exterior described later, and plays a role of improving the chemical resistance of the highly corrosive lithium secondary battery to the electrolytic solution and the like.
- a resin film having such properties a heat fusible resin film is preferable.
- the material of the heat sealable resin film include polypropylene, polyethylene, maleic acid modified polypropylene, ethylene-acrylate copolymer, ionomer resin and the like. It is preferable that a resin film is a thing containing these heat sealable resin films.
- the thickness of the resin film is not particularly limited, but is preferably 9 to 100 ⁇ m, more preferably 20 to 80 ⁇ m, and still more preferably 40 to 80 ⁇ m.
- the resin film has a thickness of 9 ⁇ m or more, sufficient heat seal strength is obtained when it is used as a packaging material for a battery exterior, and corrosion resistance to an electrolytic solution and the like is improved.
- the thickness of the resin film is 100 ⁇ m or less, when used as a packaging material for battery exterior, the strength of the packaging material is sufficient and the formability is good.
- the adhesive layer plays a role of bonding the metal foil and the resin film.
- the adhesive layer is obtained by irradiating the present adhesive with active energy rays such as ultraviolet rays and curing the present adhesive.
- the thickness of the adhesive layer is not particularly limited as long as the metal foil and the resin film can be adhered, but it is preferably 0.5 to 10 ⁇ m, and more preferably 1 to 5 ⁇ m.
- metal foils and / or resin films are obtained from the present adhesive if metal foil and resin film are laminated via the adhesive layer obtained from the present adhesive. May be laminated through an adhesive layer.
- the laminate of the present embodiment includes not only one in which the metal foil and the resin film are laminated through only the adhesive layer, but also a layer other than the adhesive layer between the metal foil and the adhesive layer. Also includes for example, the laminate of the present embodiment may include an intermediate resin layer or the like described later between the metal foil and the adhesive layer.
- the present adhesive is applied to the surface of a metal foil, a resin film is laminated on the coated surface and pressure-bonded, and then an active energy ray such as ultraviolet light is irradiated to cure the present adhesive.
- an active energy ray such as ultraviolet light
- the laminate may be heated at 70 to 90 ° C. for about one hour after irradiation with active energy rays.
- the use of the laminated body of this embodiment is not specifically limited, A packaging use is mentioned as a suitable use.
- the contents to be packaged in this laminate include liquids containing acids, alkalis, organic solvents and the like, such as putties (thickening putty, thinning putty etc.), paints (oil-based paint etc.), lacquers (lacquers) Examples include clear lacquers, and solvent-based ones such as automotive compounds.
- this laminated body is suitable for packaging the electrolyte solution of a lithium ion battery, it can be used suitably as a packaging material for battery exteriors.
- the metal foil is an aluminum foil
- the resin film contains a heat fusible resin film
- an outer layer made of a heat resistant resin film is provided outside the aluminum foil. .
- the present invention provides a battery case packaging material including the laminate of the above-mentioned embodiment (hereinafter sometimes simply referred to as "the present laminate").
- the packaging material for battery exteriors of this embodiment provides the outer layer which consists of a heat resistant resin film on the outer side of the metal foil of this laminated body.
- a first intermediate resin layer and / or a second intermediate resin layer or the like as needed.
- Specific examples of preferred embodiments include the following configurations (1) to (8). In the following configuration, the metal foil layer, the adhesive layer, and the resin film layer are the same as those in the present laminate.
- outer layer It is preferable to use a resin film excellent in heat resistance, moldability, insulation and the like for the outer layer.
- stretched films of polyamide (nylon) resin or polyester resin are generally used.
- the thickness of the resin film of the outer layer is preferably about 9 to 50 ⁇ m.
- the thickness of the resin film of the outer layer is more preferably about 10 to 40 ⁇ m, and still more preferably 20 to 30 ⁇ m.
- the film of the outer layer when the stretching direction of the stretched film is 0 °, the film is cut out in a predetermined size so that each of the three directions of 0 °, 45 ° and 90 ° is in the stretching direction,
- the tensile strength is 150 N / mm 2 or more, preferably 200 N / mm 2 or more, more preferably 250 N / mm 2 or more
- the tensile elongation in three directions is 80% or more, preferably It is preferable to use a material which is 100% or more, more preferably 120% or more, in order to obtain a sharper shape.
- tensile strength being 150 N / mm ⁇ 2 > or more, or the elongation by tension
- tensile_strength being 80% or more.
- the values of tensile strength and tensile elongation are values up to breakage in a tensile test of a film (length of test piece 150 mm ⁇ width 15 mm ⁇ thickness 9 to 50 ⁇ m, tensile speed 100 mm / min). The test pieces are cut out in three directions.
- first intermediate resin layer polyamide resin, polyester resin, polyethylene resin or the like is used for the purpose of improving the mechanical strength of the battery exterior packaging material.
- the first intermediate resin layer may be either a single-layer resin film or a multi-layer resin film (produced by coextrusion of two layers, coextrusion of three layers, or the like).
- a heat bondable extruded resin such as a polyamide resin, a polyester resin, a polyethylene resin, or polypropylene is used mainly for the purpose of improving the electrolyte resistance.
- the second intermediate resin layer may be either a single layer resin film or a multiple layer resin film.
- the thicknesses of the first intermediate resin layer and the second intermediate resin layer are not particularly limited, but in the case where these are provided, they are usually about 0.1 to 30 ⁇ m.
- a coat layer may be provided on the outer layer.
- the coating layer is formed by coating a gas barrier polymer on the outer layer, depositing an inorganic metal such as aluminum metal or silicon oxide / aluminum oxide on the outer layer, and coating a thin film of metal and inorganic substance on the outer layer.
- the battery packaging material of the present embodiment is excellent in electrolytic solution resistance, heat resistance, and water vapor and other gas barrier properties, and is preferably used to manufacture a battery case for a secondary battery, particularly a lithium ion battery. Used.
- the present invention provides a battery case including the battery exterior packaging material of the above-described embodiment (hereinafter, sometimes simply referred to as “the battery exterior packaging material”).
- the battery case of the present embodiment can be manufactured by molding the battery outer packaging material. Since the packaging material for a battery exterior is excellent in moldability, the battery case of the present embodiment can be easily obtained by molding according to a known method. Although the method of molding is not particularly limited, when it is molded by deep drawing or stretch molding, a battery case with high complex shape and dimensional accuracy can be produced. Therefore, the present invention also provides a method for producing a battery case, which comprises deep drawing or stretch forming the battery packaging material.
- the battery case of the present embodiment is excellent in electrolytic solution resistance, heat resistance, and water vapor and other gas barrier properties, and is suitably used as a battery case for a secondary battery, particularly a lithium ion battery.
- Synthesis Example 1 Synthesis of Polyurethane Polyol (a1-1) In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 138.7 g of GI-1000 (Nippon Soda's hydrogenated polybutadiene polyol), and TCD alcohol DM 15.4 g (Oxea Tricyclodecane Dimethanol), 36.5 g Desmodur W (Methylene bis (4-cyclohexylisocyanate) manufactured by Bayer), 190 Biscote # 155 (cyclohexyl acrylate manufactured by Osaka Organic Chemical Industry Co., Ltd.) .6 g, 0.19 g of hydroquinone monomethyl ether (manufactured by Wako Pure Chemical Industries, Ltd.), and 0.04 g of KS-1260 (dibutyltin dilaurate manufactured by Sakai Chemical Industry Co., Ltd.) are added and stirred at 80 to 85 ° C.
- GI-1000 Nippo
- Synthesis Example 2 Synthesis of Polyurethane Polyol (a1-2) In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 138.7 g of GI-1000 (Nippon Soda Co., Ltd.
- Synthesis Example 3 Synthesis of Polyurethane Polyol (a1-3) In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 142.5 g of Priplast 3197 (hydrogenated dimer acid polyester polyol manufactured by Croda), and TCD alcohol DM 13.6 g (Oxea Tricyclodecanedimethanol), 31.4 g Desmodur W (Methylene bis (4-cyclohexylisocyanate) manufactured by Bayer) 93.4 Biscoat # 155 (cyclohexyl acrylate manufactured by Osaka Organic Chemical Industry Co., Ltd.) 93.
- Synthesis Example 4 Synthesis of Polyurethane Acrylate (a2-1) In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 122.4 g of GI-1000 (Nippon Soda Co., Ltd.
- Synthesis Example 5 Synthesis of Polyurethane Polyol (a1-4) In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 138.7 g of GI-1000 (Nippon Soda's hydrogenated polybutadiene polyol), and TCD alcohol DM 15.4 g (Oxea Tricyclodecane Dimethanol), 28.7 g Cosmonate NBDI (Mitsui Chemicals, norbornane diisocyanate), 182.8 g Biscoat # 155 (Cyclohexyl acrylate from Osaka Organic Chemical Industry) 0.18 g of hydroquinone monomethyl ether (manufactured by Wako Pure Chemical Industries, Ltd.) and 0.04 g of KS-1260 (dibutyltin dilaurate manufactured by Sakai Chemical Industry Co., Ltd.) are charged, and the temperature is raised to 80-85 ° C.
- GI-1000 Nippon Soda's hydrogenated poly
- GI-1000 Hydrogenated polybutadiene polyol manufactured by Nippon Soda Co., Ltd. (theoretical amount of hydroxyl groups: 1.23 mmol / g)
- Priplast 3197 Crodiator hydrogenated dimer acid polyester polyol (theoretical amount of hydroxyl groups: 1.05 mmol / g)
- TCD alcohol DM Tricyclodecanedimethanol manufactured by Oxea (theoretical hydroxyl content: 10.2 mmol / g)
- Desmodur W Bayer manufactured methylene bis (4-cyclohexyl isocyanate) (NCO content: 7.63 mmol / g)
- Cosmonate NBDI Mitsui Chemicals, Inc.
- Norbornane diisocyanate NCO content: 9.71 mmol / g
- -HEA 2-hydroxyethyl acrylate (theoretical hydroxyl content: 8.62 mmol / g) manufactured by Osaka Organic Chemical Industry Ltd.
- Hydroquinone monomethyl ether manufactured by Wako Pure Chemical Industries KS-1260: dibutyltin dilaurate manufactured by Sakai Chemical Industry Co., Ltd.
- Example 1 14.5 g (solid content) of the polyurethane polyol (a1-1) synthesized in Synthesis Example 1 as component (A), NK ester A-DCP as component (B) (manufactured by Shin-Nakamura Chemical Co., Ltd., tricyclopentadimethanol) 54.0 g of acrylate), 20.0 g of biscoat # 155 as component (c0) in component (C) (including acrylic monomer in polyurethane polyol solution), HEAA (KJ Chemical Co., Ltd., N) as component (c1) 1.4 g of hydroxyethyl acrylamide), 1.4 g of light acrylate P-1A (2-acryloyloxyethyl acid phosphate, manufactured by Kyoeisha Chemical Co., Ltd.) as component (c2), and Duranate TKA-100 (Asahi Kasei Corporation) as component (D) Chemicals Inc., hexamethylene diisocyanate isocyanine 5.7 g
- Examples 2 to 9, Comparative Examples 1 to 6 Adhesive compositions of Examples 2 to 9 and Comparative Examples 1 to 6 were prepared in the same manner as Example 1 except that the formulations shown in Table 1 were used.
- NCO / active hydrogen ratio The NCO / active hydrogen ratio of the adhesive compositions of Examples 1 to 9 and the adhesive compositions of Comparative Examples 1 to 6 was determined from the following equation.
- active hydrogen means hydrogen which can react with an isocyanato group among hydrogens contained in a hydroxyl group, a carboxy group or an amino group.
- Outer layer Stretched polyamide film (thickness 25 ⁇ m)
- Adhesive for outer layer Adhesive for urethane-based dry lamination (manufactured by Toyo Moreton Co., Ltd .: AD 502 / CAT 10, coating amount 3 g / m 2 (during application))
- Aluminum foil layer Aluminum foil of aluminum-iron alloy (AA standard 8079-O material, thickness 40 ⁇ m)
- Adhesive for inner layer Adhesive composition of Examples 1 to 9 or Comparative Examples 1 to 6 (coating amount: thickness 2 ⁇ m)
- Inner layer Unstretched polypropylene film (40 ⁇ m thick)
- the adhesive composition is applied to a thickness of 2 ⁇ m using a bar coater on the aluminum foil layer of the laminate having the structure of the outer layer / the outer layer adhesive layer / the aluminum foil layer, and the inner layer using a roll press at 80 ° C.
- the unstretched polypropylene film of material was stuck together.
- the adhesive composition was cured by ultraviolet irradiation. After curing, heating was performed by leaving it for 1 hour in an atmosphere of 80 ° C.
- UV irradiation conditions were performed on condition of the following.
- UV irradiation device Heraeus LH6, D-bulb irradiation intensity 2,400 mW / cm 2 (UVA 320 to 390 nm) conveyor speed 10 m / min Integrated light quantity 600mJ / cm 2
- T-shaped peel strength in a normal state T-shaped peel strength in an atmosphere at 85 ° C., and immersion in an electrolytic solution solvent, with respect to the packaging material for battery exterior prepared using the adhesive composition of Examples 1 to 9 or Comparative Examples 1 to 6.
- the subsequent T-peel strength was measured.
- the conditions and method of measurement are as described in (1) to (3) below.
- ⁇ Method of preparing cured adhesive sheet test piece The preparation of a cured adhesive sheet used as a test piece for film strength was performed by the following method. A frame of 40 mm ⁇ 80 mm ⁇ 300 ⁇ m was sandwiched between release PET films, and the adhesive compositions of Examples 1 to 9 or Comparative Examples 1 to 6 were injected therein. Bonding by irradiating ultraviolet rays on both sides 10 times (total light amount 6,000 mJ / cm 2 ) at an irradiation intensity of 2,400 mW / cm 2 and conveyor speed 10 m / min on one side and irradiating a total of 12,000 J / cm 2 The agent composition was allowed to cure. The resulting cured adhesive was cut into a 40 mm ⁇ 15 mm ⁇ 300 ⁇ m shape to give a test piece of film strength.
- TKA-100 isocyanurate compound of hexamethylene diisocyanate manufactured by Asahi Kasei Corporation (NCO content: 5.35 mmol / g )
- Component SB-PI 718 2, 4, 6-trimethyl benzoyl diphenyl phosphine oxide manufactured by SHUANG-BANGINDUSTRIAL Other components
- BiCAT Z manufactured by Shepherd Chemical, zinc neodecanoate A-400: Shin-Nakamura Chemical Co.
- Polyethylene glycol # 400 diacrylate EBECRYL 600 bisphenol A type epoxy acrylate manufactured by Daicel Ornex
- the adhesive composition of Comparative Example 1 was inferior to the adhesive composition of Examples 1 to 9 in T-shaped peel strength after immersion in an electrolytic solution solvent. Moreover, in the adhesive composition of Comparative Example 1, the cured product was brittle, and a cured adhesive sheet could not be produced, so the film strength could not be measured.
- the adhesive composition of Comparative Example 2 is inferior to the adhesive compositions of Examples 1 to 9 in T-peel strength under an atmosphere at 85 ° C. and T-peel strength after immersion in a solvent of an electrolytic solution.
- the adhesive composition of Comparative Example 3 was inferior to the adhesive composition of Examples 1 to 9 in the T-shaped peel strength after immersion in an electrolytic solution solvent and the film strength after immersion in an electrolytic solution solvent.
- Comparative Example 4 is an adhesive composition in which a diacrylate having a polyethylene glycol skeleton is blended instead of the component (B), but the compatibility with the component (A) is poor and the adhesive composition is separated. Therefore, the battery outer packaging material and the cured adhesive sheet could not be prepared, and the peel strength and the film strength could not be measured.
- Comparative Example 5 is an adhesive composition in which an epoxy acrylate is blended instead of the component (B), but the compatibility with the component (A) is poor and the adhesive composition is separated. In addition, because of the high viscosity, the battery case packaging material and the cured adhesive sheet could not be prepared, and the peel strength and the film strength could not be measured.
- the comparative example 6 is an adhesive composition which mix
- the metal foil of the present invention and the UV curable adhesive composition for resin film lamination are excellent in productivity, and have excellent adhesion even after immersion in an electrolytic solution or under high temperature, and in particular, an aluminum foil and a heat fusible resin It is suitable for joining with a film.
- the laminate of the present invention is suitably used as a packaging material for a battery exterior used for the preparation of a secondary battery such as a lithium ion battery since it is excellent in heat resistance and electrolyte resistance, and this laminate is molded
- a battery case excellent in heat resistance and electrolyte resistance can be manufactured. And, by using the battery case, it is possible to manufacture a safe secondary battery having a long life.
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Abstract
Description
本願は、2017年11月16日に、日本に出願された特願2017-220686号に基づき優先権を主張し、その内容をここに援用する。
〔1〕(A)水酸基、アクリロイル基、及びカルボキシ基からなる群より選択される、少なくとも1種の官能基を有するポリウレタン1~20質量%、(B)活性水素基を有さず、エチレン性不飽和結合を2つ以上有する単量体30~90質量%、(C)エチレン性不飽和結合を1つ有する脂肪族単量体1~55質量%、(D)ポリイソシアネート化合物1~15質量%、及び(E)光開始剤0.5~5質量%を含む、金属箔と樹脂フィルムのラミネート用接着剤であって、前記(B)は、脂環構造、芳香環構造及びヘテロ環構造からなる群より選択される、少なくとも1種の環状構造を有し、前記(C)は、炭素原子数1~12の鎖状炭化水素基、及び炭素原子数5~10の脂環式基からなる群より選択される少なくとも1種の基を有する、接着剤。
〔2〕前記(A)が、ポリウレタンポリオール(a1)、ポリウレタンアクリレート(a2)、及びカルボキシ基含有ポリウレタン(a3)からなる群より選択される少なくとも1種を含む、〔1〕に記載の接着剤。
〔3〕前記ポリウレタンポリオール(a1)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基とを併せ持つ炭化水素、及び(3)ポリイソシアネート化合物、を共重合せしめて得られるポリウレタンポリオールである、〔2〕に記載の接着剤。
〔4〕前記ポリオールが、(1a)脂環構造を含まないポリオレフィンポリオール、並びに(1b)水添ダイマー酸から誘導される構成単位及び水添ダイマージオールから誘導される構成単位を有するポリエステルポリオール、からなる群より選択される少なくとも1種である、〔3〕に記載の接着剤。
〔5〕前記ポリウレタンアクリレート(a2)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(4)1つ以上の水酸基を有する(メタ)アクリレート、を共重合せしめて得られるポリウレタンアクリレートである、〔2〕に記載の接着剤。
〔6〕前記カルボキシ基含有ポリウレタン(a3)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(5)1つ以上の水酸基と1つ以上のカルボキシ基とを有する化合物、を共重合せしめて得られるカルボキシ基含有ポリウレタンである、〔2〕に記載の接着剤。
〔7〕前記(C)が、活性水素基を含み、エチレン性不飽和結合を1つ有する脂肪族単量体(c1)を含む、〔1〕~〔6〕のいずれか一項に記載の接着剤。
〔8〕前記(C)が、リンを含有し、エチレン性不飽和結合を1つ有する脂肪族単量体(c2)を含む、〔1〕~〔7〕のいずれか一項に記載の接着剤。
〔9〕前記(A)及び前記(c1)に含まれる活性水素の合計数に対する、前記(D)に含まれるイソシアナト基数の比率(NCO/活性水素)が、1.5以上であることを特徴とする、〔7〕又は〔8〕に記載の接着剤。
〔10〕金属箔と樹脂フィルムとが、〔1〕~〔9〕のいずれか一項に記載の接着剤を硬化させてなる接着剤層を介して積層された、積層体。
〔11〕前記金属箔がアルミニウム箔であり、前記樹脂フィルムが熱融着性樹脂フィルムを含む、〔10〕に記載の積層体。
〔12〕前記金属箔の厚さが10~100μmであり、前記樹脂フィルムの厚さが9~100μmである、〔10〕又は〔11〕に記載の積層体。
〔13〕〔10〕~〔12〕のいずれか一項に記載の積層体を含む、電池外装用包装材。
〔14〕〔13〕に記載の電池外装用包装材を含む、電池ケース。
〔15〕〔13〕に記載の電池外装用包装材を深絞り成形又は張り出し成形することを含む、電池ケースの製造方法。
一実施形態において、本発明は、金属箔と樹脂フィルムのラミネート用接着剤を提供する。本実施形態の接着剤は、(A)水酸基、アクリロイル基、及びカルボキシ基からなる群より選択される、少なくとも1種の官能基を有するポリウレタン1~20質量%、(B)活性水素基を有さず、エチレン性不飽和結合を2つ以上有する単量体30~90質量%、(C)エチレン性不飽和結合を1つ有する脂肪族単量体1~55質量%、(D)ポリイソシアネート化合物1~15質量%、及び(E)光開始剤0.5~5質量%を含む。前記(B)は、脂環構造、芳香環構造及びヘテロ環構造からなる群より選択される、少なくとも1種の環状構造を有する。また、前記(C)は、炭素原子数1~12の鎖状炭化水素基、及び炭素原子数5~10の脂環式基からなる群より選択される少なくとも1種の基を有する。
以下、「接着剤層」という場合、本実施形態の接着剤を硬化させて得られる接着剤層を指す。
(A)成分は、水酸基、アクリロイル基、及びカルボキシ基からなる群より選択される、少なくとも1種の官能基を有するポリウレタンである。前記ポリウレタンの数平均分子量は、1,000~50,000が好ましく、3,000~30,000がより好ましい。
(A)成分としてのポリウレタンは、官能基として水酸基を有するポリウレタンであり得る(以下、「水酸基含有ポリウレタン」という。)。水酸基含有ポリウレタンとしては、ポリウレタンポリオール(以下、「ポリウレタンポリオール(a1)」という場合がある。)が挙げられる。
ポリウレタンポリオール(a1)は、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基とを併せ持つ炭化水素、及び(3)ポリイソシアネート化合物、を共重合せしめて得ることができる。すなわち、ポリウレタンポリオール(a1)は、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基とを併せ持つ炭化水素、及び(3)ポリイソシアネート化合物の共重合体であるともいえる。
前記ポリオールは、(1a)脂環構造を含まないポリオレフィンポリオール、並びに(1b)水添ダイマー酸から誘導される構成単位、及び水添ダイマージオールから誘導される構成単位を有するポリエステルポリオール、からなる群より選択される少なくとも1種であることが好ましい。
脂環構造を含まないポリオレフィンポリオールは、1種又は2種以上のオレフィンを重合又は共重合させてなるポリオレフィン骨格と、2つ以上の水酸基とを含み、かつ脂環構造を有さないものであれば、特に制限されない。脂環構造を含まないポリオレフィンポリオールの例としては、ポリブタジエンポリオール、ポリイソプレンポリオールなどのポリジエンポリオール;、それらのポリジエンポリオールとポリオレフィンとのグラフト重合物;以上に挙げたポリジエンポリオール、グラフト重合物などの水素添加物;等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。接着剤層の耐電解液性の観点からは、脂環構造を含まないポリオレフィンポリオールは、構造中に実質的に不飽和炭化水素構造を含まないことが好ましい。脂環構造を含まないポリオレフィンポリオールの好ましい例としては、例えば、上記に挙げた各種ポリオレフィンポリオールの水素添加物が挙げられる。これらの市販品としては、例えば、GI-1000、GI-2000、GI-3000(以上、日本曹達製)、エポール(出光興産製)等が挙げられる。
カラム:昭和電工株式会社製、KF-806L
カラム温度:40℃
試料:試料ポリマーの0.2質量%テトラヒドロフラン溶液
流量:2ml/分
溶離液:テトラヒドロフラン
検出器:示差屈折率計(RI)
本明細書において、「ダイマー酸」とは、エチレン性不飽和結合を2~4個有する炭素原子数14~22の脂肪酸を、不飽和結合部で反応して得られる二量体酸をいう。本明細書において、「水添ダイマー酸」とは、前記ダイマー酸の炭素-炭素二重結合を水素化して得られる飽和ジカルボン酸をいう。水添ダイマー酸の市販品としては、例えば、EMPOL1008およびEMPOL1062(BASF社製)、PRIPOL1009等(クローダ社製)等が挙げられる。
飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素は、飽和又は不飽和の環式炭化水素構造と、2つ以上の水酸基とを有し、その他の部分の構造が炭化水素からなる化合物であれば、特に制限されない。
ポリイソシアネート化合物は、イソシアナト基を2つ以上含有する化合物、又はその多量体であれば、特に制限はされない。例えば、1,4-シクロヘキサンジイソシアネート、イソホロンジイソシアネート、メチレンビス(4-シクロヘキシルイソシアネート)、1,3-ビス(イソシアナトメチル)シクロヘキサン、1,4-ビス(イソシアナトメチル)シクロヘキサン、ノルボルナンジイソシアネートなどの飽和脂環式ジイソシアネート;2,4-トリレンジイソシアネート、2,6-トリレンジイソシアネート、ジフェニルメタン-4,4′-ジイソシアネート、1,3-キシリレンジイソシアネート、1,4-キシリレンジイソシアネートなどの芳香族ジイソシアネート;ヘキサメチレンジイソシアネート、2,4,4-トリメチルヘキサメチレンジイソシアネート、2,2,4-トリメチルヘキサンメチレンジイソシアネートなどの脂肪族ジイソシアネート;等、並びに前記例示した化合物のアロファネート化多量体、イソシアヌレート化物、及びビウレット変性物等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。
ポリイソシアネート化合物は、好ましくは、飽和脂環式ジイソシアネートであり、好ましい具体例としては、1,4-シクロヘキサンジイソシアネート、イソホロンジイソシアネート、メチレンビス(4-シクロヘキシルイソシアネート)、1,3-ビス(イソシアナトメチル)シクロヘキサン、1,4-ビス(イソシアナトメチル)シクロヘキサン、ノルボルナンジイソシアネート等が挙げられる。より好ましくは、イソホロンジイソシアネート、メチレンビス(4-シクロヘキシルイソシアネート)、ノルボルナンジイソシアネート等が挙げられる。これらの市販品としては、デスモジュールI、デスモジュールW(それぞれバイエル社製)、IPDI、H12MDI(それぞれデグッサ社製)等が挙げられる。
(A)成分としてのポリウレタンは、官能基としてアクリロイル基を有するポリウレタンであり得る(以下、「アクリロイル基含有ポリウレタン」という。)。アクリロイル基含有ポリウレタンとしては、ポリウレタンアクリレート(以下、「ポリウレタンアクリレート(a2)」という場合がある。)が挙げられる。
ポリウレタンアクリレート(a2)は、(1)ポリオール、(2)飽和または不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(4)1つ以上の水酸基を有する(メタ)アクリレート、を共重合せしめて得ることができる。すなわち、ポリウレタンアクリレート(a2)は、(1)ポリオール、(2)飽和または不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(4)1つ以上の水酸基を有する(メタ)アクリレートの共重合体であるともいえる。
本明細書において、「(メタ)アクリレート」とは、メタクリレート又はアクリレートを意味する。
1つ以上の水酸基を有する(メタ)アクリレートは、1つ以上の水酸基を有し、(メタ)アクリレート骨格を有するものであれば、特に制限されない。1つ以上の水酸基を有する(メタ)アクリレートの例としては、2-ヒドロキシエチル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレート、ヒドロキシペンチル(メタ)アクリレート、ヒドロキシヘキシル(メタ)アクリレート、ヒドロキシオクチル(メタ)アクリレート、ペンタエリスリトールトリ、ジ又はモノ(メタ)アクリレート、トリメチロールプロパンジ又はモノ(メタ)アクリレートなどのヒドロキシアルキル(メタ)アクリレート等が挙げられる。
これらの中でも、反応性の観点から、2-ヒドロキシエチル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレートが好ましい。
(A)成分としてのポリウレタンは、官能基としてカルボキシ基を有するポリウレタンであり得る(以下、「カルボキシ基含有ポリウレタン」という。)。以下、カルボキシ基含有ポリウレタンを、「カルボキシ基含有ポリウレタン(a3)」という場合がある。
カルボキシ基含有ポリウレタンは、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(5)1つ以上の水酸基と1つ以上のカルボキシ基とを有する化合物、を共重合せしめて得ることができる。すなわち、カルボキシ基含有ポリウレタンは、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(5)1つ以上の水酸基と1つ以上のカルボキシ基とを有する化合物の共重合体であるともいえる。
1つ以上の水酸基と1つ以上のカルボキシ基とを有する化合物は、1つ以上の水酸基と1つ以上のカルボキシ基とを有するものであれば、特に制限されない。1つ以上の水酸基と1つ以上のカルボキシ基を有する化合物の例としては、グリコール酸、3-ヒドロキシプロピオン酸、2-ヒドロキシ酪酸、3-ヒドロキシ酪酸、4-ヒドロキシ酪酸、2,2-ジメチロールプロピオン酸、2,2-ジメチロール酪酸、リンゴ酸、クエン酸などの脂肪族ヒドロキシ酸が挙げられる。
これらの中でも、反応性の観点から、2,2-ジメチロールプロピオン酸、2,2-ジメチロール酪酸が好ましい。
(A)成分は、1種を単独で使用してもよく、2種以上を併用してもよい。
(B)成分は、活性水素基を有さず、エチレン性不飽和結合を2つ以上有する単量体である。(B)成分の単量体は、脂環構造、芳香環構造及びヘテロ環構造からなる群より選択される、少なくとも1種の環状構造を有する。
(B)成分のエチレン性不飽和結合は、特に限定されないが、反応性の面から(メタ)アクリロイルオキシ基に由来するものが好ましい。即ち、多官能アクリレート単量体が好ましい。「(メタ)アクリロイルオキシ基」とは、アクリロイルオキシ基又はメタクリロイルオキシ基を意味する。
(B)成分は、1種を単独で使用してもよく、2種以上を併用してもよい。
(C)成分は、エチレン性不飽和結合を1つ有する脂肪族単量体である。(C)成分のエチレン性不飽和脂肪族単量体は、炭素原子数1~12の鎖状炭化水素基、及び炭素原子数5~10の脂環式基からなる群より選択される少なくとも1種の基を有する。
(C)成分のエチレン性不飽和結合を1つ有する脂肪族単量体が有し得る炭素原子数1~12の鎖状炭化水素基は、直鎖状であっても、分岐鎖状であってもよい。直鎖状炭化水素基としては、直鎖状アルキル基、及び直鎖状アルキレン基が挙げられる。具体的には、例えば、メチル基、メチレン基、エチル基、エチレン基、プロピル基、プロピレン基、ブチル基、ブチレン基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基等が挙げられる。分岐鎖状炭化水素基としては、例えば、イソプロピル基、イソブチル基、sec-ブチル基、tert-ブチル基、ペンチル基、イソペンチル基、ネオペンチル基、エチルヘキシル基、分岐ノニル基等が挙げられる。
(C)成分のエチレン性不飽和結合を1つ有する脂肪族単量体が有し得る炭素原子数5~10の脂環式基としては、シクロペンチル基、シクロヘキシル基、シクロヘプチル基、シクロオクチル基などのシクロアルキル基;イソボニル基、ジシクロペンテニル基などの架橋構造を有する脂環式基;等が挙げられる。
これらの鎖状炭化水素基又は脂環式基は、1つ以上の水素原子が置換基で置換されていてもよい。置換基としては、前述の活性水素基、後述するリン含有基等が挙げられる。
(C)成分は、活性水素基を含み、エチレン性不飽和結合を1つ有する脂肪族単量体(c1)、及びリンを含有し、エチレン性不飽和結合を1つ有する脂肪族単量体(c2)以外の、エチレン性不飽和結合を1つ有する脂肪族単量体(c0)を含むことが好ましい。
(c0)成分は、活性水素基及びリンを含まないエチレン性不飽和結合を1つ有する脂肪族単量体である。(c0)成分の具体例としては、エチル(メタ)アクリレート、プロピル(メタ)アクリレート、ブチル(メタ)アクリレート、ペンチル(メタ)アクリレート、ヘキシル(メタ)アクリレート、ヘプチル(メタ)アクリレート、2-エチルヘキシル(メタ)アクリレート、ノニル(メタ)アクリレート、イソノニル(メタ)アクリレート、分岐ノニル(メタ)アクリレート、デシル(メタ)アクリレート、イソデシル(メタ)アクリレート、ラウリル(メタ)アクリレート等の脂肪族アクリレート;シクロヘキシル(メタ)アクリレート、イソボルニル(メタ)アクリレート、ジシクロペンテニル(メタ)アクリレート、ジシクロペンタニル(メタ)アクリレート等の脂環式アクリレート;等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。
これらの中でも、耐電解液性及び反応性の観点から、シクロヘキシルアクリレート、イソボルニルアクリレートが好ましい。
(C)成分は、活性水素基を含み、エチレン性不飽和結合を1つ有する脂肪族単量体(c1)を含むことが好ましい。(c1)成分が含む活性水素基としては、水酸基が好ましい。(c1)成分の例としては、水酸基含有アクリレート、水酸基含有アクリルアミド等が挙げられる。水酸基含有アクリレートの具体例としては、2-ヒドロキシエチル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレート、ヒドロキシペンチル(メタ)アクリレート、ヒドロキシヘキシル(メタ)アクリレート、ヒドロキシオクチル(メタ)アクリレートなどのヒドロキシアルキル(メタ)アクリレート等が挙げられる。水酸基含有アクリルアミドの具体例としては、N-ヒドロキシメチルアクリルアミド、N-ヒドロキシエチルアクリルアミドなどのヒドロキシアルキルアクリルアミド等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。
これらの中でも、金属基材への接着性の観点から、N-ヒドロキシエチルアクリルアミドが好ましい。
(C)成分は、リンを含有し、エチレン性不飽和結合を1つ有する脂肪族単量体(c2)を含むことが好ましい。(c2)成分が含むリン含有基としては、リン酸基が好ましい。(c2)成分の例としては、アクリロイルオキシ基とリン酸基とを含む脂肪族単量体が挙げられる。そのような構造を含む脂肪族単量体の具体例としては、2-アクリロイルオキシエチルアシッドフォスフェート、2-アクリロイルオキシブチルアシッドフォスフェートなどのリン酸(アクリロイルオキシ)アルキル等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。
(C)成分が、(c0)成分及び(c1)成分を含む場合、(c0)成分の含有量(質量)と(c1)成分の含有量(質量)との比率(質量比)としては、例えば、(c0)成分:(c1)成分=50:1~1:1が挙げられる。好ましくは、(c0)成分:(c1)成分=30:1~5:1である。
また、(C)成分が、(c0)成分及び(c2)成分を含む場合、(c0)成分の含有量(質量)と(c2)成分の含有量(質量)との比率(質量比)としては、例えば、(c0)成分:(c2)成分=100:1~1:1が挙げられる。好ましくは、(c0)成分:(c2)成分=50:1~10:1である。
また、(C)成分が、(c1)成分及び(c2)成分を含む場合、(c1)成分の含有量(質量)と(c2)成分の含有量(質量)との比率(質量比)としては、例えば、(c1)成分:(c2)成分=5:1~1:5が挙げられる。好ましくは、(c1)成分:(c2)成分=3:1~1:3である。
(D)成分は、ポリイソシアネート化合物である。(D)成分としてのポリイソシアネート化合物は、イソシアナト基を2つ以上含有する化合物、又はその多量体であり、(A)成分、(B)成分又は(C)成分に該当しないものであれば、特に制限はされない。ポリイソシアネート化合物としては、上記「<(A)成分>(水酸基を有するポリウレタン)(3)ポリイソシアネート化合物」で挙げたポリイソシアネート化合物と同様のものが挙げられる。(D)成分としてのポリイソシアネート化合物の具体例としては、ヘキサメチレンジイソシアネート、2,4,4-トリメチルヘキサメチレンジイソシアネート、2,2,4-トリメチルヘキサンメチレンジイソシアネートなどの脂肪族ジイソシアネート;1,4-シクロヘキサンジイソシアネート、イソホロンジイソシアネート、メチレンビス(4-シクロヘキシルイソシアネート)、1,3-ビス(イソシアナトメチル)シクロヘキサン、1,4-ビス(イソシアナトメチル)シクロヘキサン、ノルボルナンジイソシアネートなどの飽和脂環式ジイソシアネート;トリレンジイソシアネート、4,4'-ジフェニルメタンジイソシアネート、ポリメチレンポリフェニルイソシアネート、キシリレンジイソシアネート、パラフェニレンジイソシアネート、1,5-ナフタレンジイソシアネートなどの芳香族ジイソシアネート;等が挙げられる。また、前記例示した化合物のアロファネート化多量体、イソシアヌレート化物、ビウレット変性物等が挙げられる。これらは、1種を単独で、又は2種以上を混合して使用することができる。
これらの中でも、金属基材への接着性の観点から、ヘキサメチレンジイソシアネートのイソシアヌレート化物が好ましい。
(E)成分は、光開始剤である。(E)成分としての光開始剤は、公知の光ラジカル重合開始剤を特に制限なく用いることができる。なお、光ラジカル重合開始剤は、紫外線、可視光線、電子線などの活性エネルギー線の照射によってラジカルを発生する化合物をいう。(E)成分としての光開始剤は、紫外線照射によりラジカルを発生する光ラジカル重合開始剤が好ましい。
(E)成分の具体例としては、ベンジルジメチルケタール、ベンジル、ベンゾイン、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテル、ベンゾインイソブチルエーテル、1-ヒドロキシシクロヘキシルフェニルケトン、2-ヒドロキシ-2-メチル-1-フェニルプロパン-1-オン、1-[4-(2-ヒドロキシエトキシ)-フェニル]-2-ヒドロキシー2-メチルー1-プロパンー1-オン、オリゴ[2-ヒドロキシー2-メチルー1-[4-1-(メチルビニル)フェニル]プロパノン、2-ヒドロキシー1-[4-[4-(2-ヒドロキシー2-メチループロピオニル)-ベンジル]-フェニル]-2-メチルプロパンー1-オン、2-メチル-1-[4-(メチルチオ)]フェニル]-2-モルフォリノプロパン-1-オン、2-ベンジルー2-ジメチルアミノー1-(4-モルフォリノフェニル)ブタンー1-オン、2-ジメチルアミノー2-(4-メチルベンジル)-1-(4-モルフォリン-4-イルーフェニル)-ブタンー1-オン、アデカオプトマーN-1414(旭電化製)、フェニルグリオキシリックアシッドメチルエステル、エチルアントラキノン及びフェナントレンキノンなどの芳香族ケトン化合物;ベンゾフェノン、2-メチルベンゾフェノン、3-メチルベンゾフェノン、4-メチルベンゾフェノン、2,4,6-トリメチルベンゾフェノン、4-フェニルベンゾフェノン、4-(メチルフェニルチオ)フェニルフェニルメタン、メチル-2-ベンゾフェノン、1-[4-(4-ベンゾイルフェニルスルファニル)フェニル]-2-メチル-2-(4-メチルフェニルスルフォニル)プロパンー1-オン、4,4‘-ビス(ジメチルアミノ)ベンゾフェノン、4,4‘-ビス(ジエチルアミノ)ベンゾフェノン、N,N′-テトラメチル-4,4′-ジアミノベンゾフェノン、N,N′-テトラエチル-4,4′-ジアミノベンゾフェノン及び4-メトキシ-4′-ジメチルアミノベンゾフェノンなどのベンゾフェノン系化合物;ビス(2,4,6-トリメチルベンゾイル)-フェニルホスフィンオキサイド、2,4,6-トリメチルベンゾイルジフェニルフォスフィンオキサイド、エチルー(2,4,6-トリメチルベンゾイル)フェニルフォスフィネート及びビス(2,6-ジメトキシベンゾイル)-2,4,4-トリメチルペンチルフォスフィンオキサイドなどのアシルホスフィンオキサイド化合物;チオキサントン、2-クロロチオキサントン、2,4-ジエチルチオキサントン、イソプロピルチオキサントン、1-クロロー4-プロピルチオキサントン、3-[3,4-ジメチルー9-オキソー9H-チオキサントンー2-イル]オキシ]-2-ヒドロキシプロピルーN,N,N―トリメチルアンモニウムクロライド及びフロロチオキサントンなどのチオキサントン系化合物;等が挙げられる。
これらの中でも、ビス(2,4,6-トリメチルベンゾイル)-フェニルホスフィンオキサイド、2,4,6-トリメチルベンゾイルジフェニルフォスフィンオキサイド、エチルー(2,4,6-トリメチルベンゾイル)フェニルフォスフィネート、ビス(2,6-ジメトキシベンゾイル)-2,4,4-トリメチルペンチルフォスフィンオキサイド等のアシルホスフィンオキサイド化合物が、紫外線吸収剤等を含有し透過性が低いフィルム越しに活性エネルギー線を照射する場合でも硬化性が良好なため、好ましい。
本実施形態の接着剤は、上記(A)~(E)成分に加えて、その他の成分を含んでいてもよい。その他成分としては、特に限定されないが、溶剤、反応促進剤、粘着付与剤、可塑剤、(A)~(C)以外のエチレン性不飽和単量体等が挙げられる。
本実施形態の接着剤は、上記(A)~(C)成分以外のエチレン性不飽和単量体を含んでいてもよい。
本実施形態の接着剤が、(C)成分として(c1)成分を含む場合、(A)成分及び(c1)成分に含まれる活性水素の合計数に対する、(D)成分に含まれるイソシアナト基数の比率(NCO/活性水素)が、1.5以上であることが好ましい。前記NCO/活性水素の比率は、1.5~5であることがより好ましく、2.0~3.0であることがさらに好ましい。
NCO/活性水素が前記範囲内であると、耐熱性及び耐電解液性に優れた接着剤層を形成することができる。
なお、「活性水素」とは、水酸基、カルボキシ基、又はアミノ基に含まれる水素のうち、イソシアナト基と反応し得る水素を意味する。
40mm×80mm×300μmの枠型の両面を離型PETフィルムで挟み、内部に樹脂を注入する。UVA波長(320~390nm)の紫外線を片面につき積算光量6,000mJ/cm2で両面に照射し、合計12,000mJ/cm2を照射する事により接着剤を硬化させ、得られた接着剤樹脂硬化物を40mm×15mm×300μmの形状に切断する。
一実施形態において、本発明は、金属箔と樹脂フィルムとが、上記実施形態の接着剤(以下、単に「本接着剤」ということがある。)を硬化させてなる接着剤層を介して積層された、積層体を提供する。
本実施形態の積層体は、後述する電池外装用包装材の製造に、好適に用いることができる。
金属箔は、後述する電池外装用包装材において、水蒸気等に対するバリア性の役割を担う。そのような性質を有する金属箔としては、アルミニウム箔が好ましい。前記アルミニウム箔の材質としては、純アルミニウム系又はアルミニウム-鉄系合金のO材(軟質材)が一般的に使用される。
金属箔の厚さは、特に限定されないが、加工性の確保及び酸素や水分の包装内への浸入を防止するバリア性確保のために、10~100μm程度が好ましい。金属箔の厚さが10μm以上であると、成形時における金属箔の破断や、ピンホールの発生が抑制される。
そのため、電池外装用包装材として用いた場合に、酸素や水分が内層に浸入するリスクが低減される。一方、金属箔の厚さが100μm以下であると、電池外装用包装材として用いた場合に、包装材の厚さや質量が適度な範囲に維持される。金属箔は、一般的に、30~50μm程度の厚さのものが使用され、40~50μmの厚さのものを使用することが好ましい。
金属箔には、樹脂フィルムとの接着性向上や耐食性向上のため、シランカップリング剤やチタンカップリング剤等のアンダーコート処理、クロメート処理等の化成処理を行ってもよい。
樹脂フィルムは、後述する電池外装用包装材において、ヒートシール性を有し、腐食性の強いリチウム二次電池の電解液等に対する耐薬品性を向上させる役割を担う。そのような性質を有する樹脂フィルムとしては、熱融着性樹脂フィルムが好ましい。熱融着性樹脂フィルムの材質としては、ポリプロピレン、ポリエチレン、マレイン酸変性ポリプロピレン、エチレン-アクリレート共重合体、アイオノマー樹脂等が挙げられる。樹脂フィルムは、これらの熱融着性樹脂フィルムを含むものであることが好ましい。
樹脂フィルムの厚さは、特に限定されないが、9~100μmが好ましく、20~80μmがより好ましく、40~80μmがさらに好ましい。樹脂フィルムの厚さが9μm以上であると、電池外装用包装材として用いた場合に、十分なヒートシール強度が得られ、電解液等に対する耐食性が良好となる。樹脂フィルムの厚さが100μm以下であると、電池外装用包装材として用いた場合に、包装材の強度が十分でありかつ、成形性が良好となる。
接着層は、上記金属箔と樹脂フィルムとを接着する役割を担う。接着層は、本接着剤に紫外線等の活性エネルギー線を照射し、本接着剤を硬化させることにより得られる。
接着層の厚さは、金属箔と樹脂フィルムとを接着できれば特に限定されないが、0.5~10μmが好ましく、1~5μmがより好ましい。
また、この積層体は、リチウムイオン電池の電解液を包装するのに好適であることから、電池外装用包装材として好適に用いることができる。電池外装用包装材として用いる場合は、金属箔がアルミニウム箔であり、かつ樹脂フィルムが熱融着性樹脂フィルムを含み、またアルミニウム箔の外側に耐熱性樹脂フィルムからなる外層が設けられることが好ましい。
一実施形態において、本発明は、上記実施形態の積層体(以下、単に「本積層体」ということがある。)を含む、電池外装用包装材を提供する。
(1)外層/金属箔層/接着剤層/樹脂フィルム層
(2)外層/第1中間樹脂層/金属箔層/接着剤層/樹脂フィルム層
(3)外層/金属箔層/第2中間樹脂層/接着剤層/樹脂フィルム層
(4)外層/第1中間樹脂層/金属箔層/第2中間樹脂層/接着剤層/樹脂フィルム層
(5)コート層/外層/金属箔層/接着剤層/樹脂フィルム層
(6)コート層/外層/第1中間樹脂層/金属箔層/接着剤層/樹脂フィルム層
(7)コート層/外層/金属箔層/第2中間樹脂層/接着剤層/樹脂フィルム層
(8)コート層/外層/第1中間樹脂層/金属箔層/第2中間樹脂層/接着剤層/樹脂フィルム層
外層には、耐熱性、成形性、絶縁性等に優れた樹脂フィルムを用いることが好ましい。
例えば、ポリアミド(ナイロン)樹脂又はポリエステル樹脂の延伸フィルム等が一般的に使用される。
外層の樹脂フィルムの厚さは、9~50μm程度であることが好ましい。外層の樹脂フィルムの厚さが9μm未満の場合、包装材の成形を行うときに延伸フィルムの伸びが不足し、金属箔(アルミニウム箔等)にネッキングが生じ、成形不良が起こり易い。一方、外層の樹脂フィルムの厚さが50μmを超えても、特段、成形性の効果が向上することはなく、逆に体積エネルギー密度を低下させる。外層の樹脂フィルムの厚さは、10~40μm程度であることがより好ましく、20~30μmであることがさらに好ましい。
第1中間樹脂層としては、ポリアミド樹脂、ポリエステル樹脂又はポリエチレン樹脂等が電池外装用包装材の機械的強度を向上させる目的で使用される。第1中間樹脂層は、単層の樹脂フィルム、複層の樹脂フィルム(2層の共押出し又は3層の共押出し等により製造する)のいずれであってもよい。
第2中間樹脂層としては、第1中間樹脂層と同様にポリアミド樹脂、ポリエステル樹脂又はポリエチレン樹脂やポリプロピレン等の熱接着性押出し樹脂が、主として耐電解液性を向上させる目的で使用される。第2中間樹脂層は、単層の樹脂フィルム、複層の樹脂フィルムのいずれであってもよい。
第1中間樹脂層及び第2中間樹脂層の厚さは、特に限定されないが、これらを設ける場合は、通常0.1~30μm程度である。
本実施形態の電池外装用包装材は、外層の上にコート層を設けてもよい。コート層の形成法としては、ガスバリア性のポリマーを外層上にコートする方法、アルミニウム金属や酸化ケイ素・酸化アルミニウム等の無機酸化物を外層上に蒸着し、金属及び無機物の薄膜を外層上にコートする方法などがある。コート層を設けることにより、水蒸気及びその他のガスバリア性がより優れた電池外装用包装材が得られる。
[電池ケース]
一実施形態において、本発明は、上記実施形態の電池外装用包装材(以下、単に「本電池外装用包装材」ということがある。)を含む、電池ケースを提供する。
攪拌装置、温度計及びコンデンサーを備えた反応容器中に、GI-1000(日本曹達製水添ポリブタジエンポリオール)を138.7g、並びにTCDアルコールDM(オクセア社製トリシクロデカンジメタノール)を15.4g、デスモジュールW(バイエル社製メチレンビス(4-シクロヘキシルイソシアネート))を36.5g、ビスコート#155(大阪有機化学工業社製シクロヘキシルアクリレート)を190.6g、ヒドロキノンモノメチルエーテル(和光純薬工業製)を0.19g、及びKS-1260(堺化学工業製ジブチルスズジラウレート)を0.04g投入し、撹拌しながら、オイルバスを用いて80~85℃に昇温した。その後、2.5時間撹拌しながら反応を継続する事で、水酸基含有ポリウレタン(a1-1)のシクロヘキシルアクリレート溶液(50%wt)を得た。なお、原材料から求められるポリウレタンポリオール(a1-1)の理論水酸基量は0.258mmol/g(固形分)となる。
攪拌装置、温度計及びコンデンサーを備えた反応容器中に、GI-1000(日本曹達社製水添ポリブタジエンポリオール)を138.7g、並びにTCDアルコールDM(オクセア社製トリシクロデカンジメタノール)を15.4g、デスモジュールW(バイエル社製メチレンビス(4-シクロヘキシルイソシアネート))を36.5g、ビスコート#155(大阪有機化学工業社製シクロヘキシルアクリレート)を95.3g、IBXA(大阪有機化学工業社製イソボルニルアクリレート)を95.3g、ヒドロキノンモノメチルエーテル(和光純薬工業製)を0.19g、及びKS-1260(堺化学工業製ジブチルスズジラウレート)を0.04g投入し、撹拌しながら、オイルバスを用いて80~85℃に昇温した。その後、2.5時間撹拌しながら反応を継続する事で、ポリウレタンポリオール(a1-2)のシクロヘキシルアクリレート/イソボルニルアクリレート溶液(50%wt)を得た。なお、原材料から求められるポリウレタンポリオール(a1-2)の理論水酸基量は0.258mmol/g(固形分)となる。
攪拌装置、温度計及びコンデンサーを備えた反応容器中に、Priplast3197(クローダ社製水添ダイマー酸ポリエステルポリオール)を142.5g、並びにTCDアルコールDM(オクセア社製トリシクロデカンジメタノール)を13.6g、デスモジュールW(バイエル社製メチレンビス(4-シクロヘキシルイソシアネート))を31.4gビスコート#155(大阪有機化学工業社製シクロヘキシルアクリレート)を93.8g、IBXA(大阪有機化学工業社製イソボルニルアクリレート)を93.8g、ヒドロキノンモノメチルエーテル(和光純薬工業製)を0.19g、及びKS-1260(堺化学工業製ジブチルスズジラウレート)を0.04g投入し、撹拌しながら、オイルバスを用いて80~85℃に昇温した。その後、2.5時間撹拌しながら反応を継続する事で、ポリウレタンポリオール(a1-3)のシクロヘキシルアクリレート/イソボルニルアクリレート溶液(50%wt)を得た。なお、原材料から求められるポリウレタンポリオール(a1-3)の理論水酸基量は0.261mmol/g(固形分)となる。
攪拌装置、温度計及びコンデンサーを備えた反応容器中に、GI-1000(日本曹達社製水添ポリブタジエンポリオール)を122.4g、並びにTCDアルコールDM(オクセア社製トリシクロデカンジメタノール)を13.6g、デスモジュールW(バイエル社製メチレンビス(4-シクロヘキシルイソシアネート))を44.2g、ビスコート#155(大阪有機化学工業社製シクロヘキシルアクリレート)92.9g、IBXA(大阪有機化学工業社製イソボルニルアクリレート)を92.9g、ヒドロキノンモノメチルエーテル(和光純薬工業製)を0.19g、及びKS-1260(堺化学工業製ジブチルスズジラウレート)を0.04g投入し、撹拌しながら、オイルバスを用いて80~85℃に昇温した。その後、2.5時間撹拌しながら反応を継続した。その後、HEA(大阪有機化学工業社製2-ヒドロキシエチルアクリレート)を5.6g投入し、2.5時間撹拌しながら反応を継続する事で、ポリウレタンアクリレート(a2-1)のシクロヘキシルアクリレート/イソボルニルアクリレート溶液(50%wt)を得た。なお、原材料から求められるポリウレタンアクリレート(a2-1)の理論水酸基量は0mmol/g(固形分)となる。
攪拌装置、温度計及びコンデンサーを備えた反応容器中に、GI-1000(日本曹達製水添ポリブタジエンポリオール)を138.7g、並びにTCDアルコールDM(オクセア社製トリシクロデカンジメタノール)を15.4g、コスモネートNBDI(三井化学社製、ノルボルナンジイソシアネート)を28.7g、ビスコート#155(大阪有機化学工業社製シクロヘキシルアクリレート)を182.8g、ヒドロキノンモノメチルエーテル(和光純薬工業製)を0.18g、及びKS-1260(堺化学工業製ジブチルスズジラウレート)を0.04g投入し、撹拌しながら、オイルバスを用いて80~85℃に昇温した。その後、2.5時間撹拌しながら反応を継続する事で、水酸基含有ポリウレタン(a1-4)のシクロヘキシルアクリレート溶液(50%wt)を得た。なお、原材料から求められるポリウレタンポリオール(a1-4)の理論水酸基量は0.269mmol/g(固形分)となる。
・GI-1000:日本曹達社製水添ポリブタジエンポリオール(理論水酸基量:1.23mmol/g)
・Priplast3197:クローダ社製水添ダイマー酸ポリエステルポリオール(理論水酸基量:1.05mmol/g)
・TCDアルコールDM:オクセア社製トリシクロデカンジメタノール(理論水酸基量:10.2mmol/g)
・デスモジュールW:バイエル社製メチレンビス(4-シクロヘキシルイソシアネート)(NCO含有量:7.63mmol/g)
・コスモネートNBDI:三井化学社製ノルボルナンジイソシアネート(NCO含有量:9.71mmol/g)
・HEA:大阪有機化学工業社製2-ヒドロキシエチルアクリレート(理論水酸基量:8.62mmol/g)
・ヒドロキノンモノメチルエーテル:和光純薬工業製
・KS-1260:堺化学工業製ジブチルスズジラウレート
(A)成分として合成例1で合成したポリウレタンポリオール(a1-1)を14.5g(固形分)、(B)成分としてNKエステル A-DCP(新中村化学社製、トリシクロペンタンジメタノールジアクリレート)を54.0g、(C)成分における(c0)成分としてビスコート#155を20.0g(ポリウレタンポリオール溶液中のアクリルモノマー分を含む)、(c1)成分としてHEAA(KJケミカル社製、N-ヒドロキシエチルアクリルアミド)を1.4g、(c2)成分としてライトアクリレートP-1A(共栄社化学製、2-アクリロイルオキシエチルアシッドフォスフェート)を1.4g、(D)成分としてデュラネートTKA-100(旭化成ケミカルズ株式会社製、ヘキサメチレンジイソシアネートのイソシアヌレート体)を5.7g、(E)成分としてSB-PI 718(SHUANG-BANGINDUSTRIAL社製、及び2,4,6-トリメチルベンゾイルジフェニルフォスフィンオキサイド)を2.7g、並びにその他成分としてBiCAT Z(Shepherd Chemical社製、ネオデカン酸亜鉛)を0.3g加えて、金属箔と樹脂フィルムのラミネート用接着剤組成物を調製した。
表1に示す配合としたこと以外は、実施例1と同様にして、実施例2~9及び比較例1~6の接着剤組成物を調製した。
上記実施例1~9の接着剤組成物及び比較例1~6の接着剤組成物のNCO/活性水素の比率を、以下の式から求めた。なお、本明細書において、「活性水素」とは、水酸基、カルボキシ基、又はアミノ基に含まれる水素のうち、イソシアナト基と反応し得る水素を意味する。
上記実施例1~9又は比較例1~6の接着剤組成物を用いて、以下のような外層/外層用接着剤層/アルミニウム箔層/内層用接着剤層/内層(樹脂フィルム層)の構造を有する電池外装用包装材を、ドライラミネーション方式で製造した。
外層用接着剤:ウレタン系ドライラミネート用接着剤(東洋モートン株式会社製:AD502/CAT10、塗布量3g/m2(塗布時))
アルミニウム箔層:アルミニウム-鉄系合金のアルミニウム箔(AA規格8079-O材、厚さ40μm)
内層用接着剤:実施例1~9又は比較例1~6の接着剤組成物(塗布量:厚さ2μm)
内層:未延伸ポリプロピレンフィルム(厚さ40μm)
外層/外層用接着剤層/アルミニウム箔層の構造を有する積層体のアルミ箔層上に、バーコーターを用いて、2μm厚みに接着剤組成物を塗布し、80℃でロールプレスを用いて内層材の未延伸ポリプロピレンフィルムを貼り合わせた。その後、紫外線照射により接着剤組成物を硬化させた。硬化後、80℃雰囲気下において1時間放置する事により加熱を行った。なお、UV照射条件は以下の条件で行った。
UV照射装置:ヘレウス社製LH6、Dバルブ使用
照射強度 2,400mW/cm2(UVA320~390nm)コンベア速度10m/min
積算光量 600mJ/cm2
実施例1~9又は比較例1~6の接着剤組成物を用いて作製した電池外装用包装材について、常態T字剥離強度、85℃雰囲気下でのT字剥離強度、及び電解液溶媒浸漬後のT字剥離強度を測定した。測定の条件、方法は下記の(1)~(3)の通りである。
長さ150mm×幅15mmの試験片及びオートグラフAG-X(株式会社島津製作所製)を用いて、23℃×50%RH雰囲気下において試験速度100mm/minで剥離させ、アルミニウム箔層と未延伸ポリプロピレンフィルム層間の180°剥離強度を測定した。
長さ150mm×幅15mmの試験片及びオートグラフAG-X(株式会社島津製作所製)を用いて、85℃雰囲気下に放置し、試験片の温度が85℃になった後に試験速度100mm/minで剥離させ、アルミニウム箔層と未延伸ポリプロピレンフィルム層間の180°剥離強度を測定した。
長さ150mm×幅15mmの試験片を電解液溶媒(エチレンカーボネート/ジエチルカーボネート、質量比50/50)に浸漬し、85℃雰囲気下に24時間放置した後に取り出し、上記(1)と同様にしてアルミニウム箔層と未延伸ポリプロピレンフィルム層間の180°剥離強度を測定した。
実施例1~9又は比較例1~6の接着剤組成物の電解液溶媒浸漬後の被膜強度を測定するために、前記接着剤組成物を用いて、硬化接着剤シートを作製した。
作製した硬化接着剤シートの長さ40mm×幅15mmの試験片を、電解液溶媒(エチレンカーボネート/ジエチルカーボネート、質量比50/50)に浸漬し、85℃雰囲気下に24時間放置した後に取り出し、23℃×50%RH雰囲気下で試験速度100mm/分で引張強度を測定した。
被膜強度の試験片として用いた硬化接着剤シートの作製は、以下の方法で行った。
40mm×80mm×300μmの枠型を離型PETフィルムで挟み、内部に実施例1~9又は比較例1~6の接着剤組成物を注入した。紫外線を片面につき照射強度2,400mW/cm2、コンベア速度10m/minで10回(積算光量6,000mJ/cm2)を両面に照射し、合計12,000J/cm2を照射する事により接着剤組成物を硬化させた。得られた接着剤硬化物を40mm×15mm×300μmの形状に切断し、被膜強度の試験片とした。
上記剥離強度及び被膜強度の測定結果を表1~3に示す。
(B)成分
・A-DCP:新中村化学工業社製トリシクロデカンジメタノールジアクリレート
(C)成分
(c0)成分
・ビスコート#155:大阪有機化学工業社製シクロヘキシルアクリレート・IBXA:大阪有機化学工業社製イソボルニルアクリレート
(c1)成分
・HEAA:KJケミカルズ社製N-ヒドロキシエチルアクリルアミド(理論水酸基量:8.70mmol/g)
(c2)成分
・P-1A:共栄社化学社製2-アクリロイルオキシブチルアシッドフォスフェート
(D)成分
・TKA-100:旭化成社製ヘキサメチレンジイソシアネートのイソシアヌレート化物(NCO含有量:5.35mmol/g)
(E)成分
・SB-PI 718:SHUANG-BANGINDUSTRIAL社製2,4,6-トリメチルベンゾイルジフェニルフォスフィンオキサイドその他成分
・BiCAT Z:Shepherd Chemical社製、ネオデカン酸亜鉛・A-400:新中村化学社製ポリエチレングリコール#400 ジアクリレート・EBECRYL 600:ダイセルオルネクス社製ビスフェノールAタイプエポキシアクリレート
比較例2の接着剤組成物は、実施例1~9の接着剤組成物と比較して、85℃雰囲気下でのT字剥離強度、及び電解液溶媒浸漬後のT字剥離強度が劣っていた。
比較例3の接着剤組成物は、実施例1~9の接着剤組成物と比較して、電解液溶媒浸漬後のT字剥離強度、及び電解液溶媒浸漬後の被膜強度が劣っていた。
比較例4は、(B)成分に替えて、ポリエチレングリコール骨格のジアクリレートを配合した接着剤組成物であるが、(A)成分との相溶性が劣り分離した。そのため、電池外装用包装材及び硬化接着剤シートを作製できず、剥離強度及び被膜強度は測定できなかった。
比較例5は、(B)成分に替えて、エポキシアクリレートを配合した接着剤組成物であるが、(A)成分との相溶性が劣り分離した。また、高粘度のため、電池外装用包装材及び硬化接着剤シートを作製できず、剥離強度及び被膜強度は測定できなかった。
比較例6は、(A)成分を過剰に配合した接着剤組成物であるが、粘度が高く、塗工性に劣っていた。そのため、電池外装用包装材及び硬化接着剤シートを作製できず、剥離強度及び被膜強度は測定できなかった。
Claims (15)
- (A)水酸基、アクリロイル基、及びカルボキシ基からなる群より選択される、少なくとも1種の官能基を有するポリウレタン1~20質量%、
(B)活性水素基を有さず、エチレン性不飽和結合を2つ以上有する単量体30~90質量%、
(C)エチレン性不飽和結合を1つ有する脂肪族単量体1~55質量%、
(D)ポリイソシアネート化合物1~15質量%、及び
(E)光開始剤0.5~5質量%
を含む、金属箔と樹脂フィルムのラミネート用接着剤であって、
前記(B)は、脂環構造、芳香環構造及びヘテロ環構造からなる群より選択される、少なくとも1種の環状構造を有し、
前記(C)は、炭素原子数1~12の鎖状炭化水素基、及び炭素原子数5~10の脂環式基からなる群より選択される少なくとも1種の基を有する、
接着剤。 - 前記(A)が、ポリウレタンポリオール(a1)、ポリウレタンアクリレート(a2)、及びカルボキシ基含有ポリウレタン(a3)からなる群より選択される少なくとも1種を含む、請求項1に記載の接着剤。
- 前記ポリウレタンポリオール(a1)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基とを併せ持つ炭化水素、及び(3)ポリイソシアネート化合物、を共重合せしめて得られるポリウレタンポリオールである、請求項2に記載の接着剤。
- 前記ポリオールが、(1a)脂環構造を含まないポリオレフィンポリオール、並びに(1b)水添ダイマー酸から誘導される構成単位及び水添ダイマージオールから誘導される構成単位を有するポリエステルポリオール、からなる群より選択される少なくとも1種である、請求項3に記載の接着剤。
- 前記ポリウレタンアクリレート(a2)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(4)1つ以上の水酸基を有する(メタ)アクリレート、を共重合せしめて得られるポリウレタンアクリレートである、請求項2に記載の接着剤。
- 前記カルボキシ基含有ポリウレタン(a3)が、(1)ポリオール、(2)飽和又は不飽和の環式炭化水素構造と2つ以上の水酸基を併せ持つ炭化水素、(3)ポリイソシアネート化合物、及び(5)1つ以上の水酸基と1つ以上のカルボキシ基とを有する化合物、を共重合せしめて得られるカルボキシ基含有ポリウレタンである、請求項2に記載の接着剤。
- 前記(C)が、活性水素基を含み、エチレン性不飽和結合を1つ有する脂肪族単量体(c1)を含む、請求項1~6のいずれか一項に記載の接着剤。
- 前記(C)が、リンを含有し、エチレン性不飽和結合を1つ有する脂肪族単量体(c2)を含む、請求項1~7のいずれか一項に記載の接着剤。
- 前記(A)及び前記(c1)に含まれる活性水素の合計数に対する、前記(D)に含まれるイソシアナト基数の比率(NCO/活性水素)が、1.5以上であることを特徴とする、請求項7又は8に記載の接着剤。
- 金属箔と樹脂フィルムとが、請求項1~9のいずれか一項に記載の接着剤を硬化させてなる接着剤層を介して積層された、積層体。
- 前記金属箔がアルミニウム箔であり、前記樹脂フィルムが熱融着性樹脂フィルムを含む、請求項10に記載の積層体。
- 前記金属箔の厚さが10~100μmであり、前記樹脂フィルムの厚さが9~100μmである、請求項10又は11に記載の積層体。
- 請求項10~12のいずれか一項に記載の積層体を含む、電池外装用包装材。
- 請求項13に記載の電池外装用包装材を含む、電池ケース。
- 請求項13に記載の電池外装用包装材を深絞り成形又は張り出し成形することを含む、電池ケースの製造方法。
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CN114787213A (zh) * | 2019-12-13 | 2022-07-22 | 日东新兴有限公司 | 固化性组合物 |
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CN114787213A (zh) * | 2019-12-13 | 2022-07-22 | 日东新兴有限公司 | 固化性组合物 |
JP7052913B1 (ja) | 2021-06-30 | 2022-04-12 | 東洋インキScホールディングス株式会社 | 蓄電デバイス用包装材、蓄電デバイス用容器及び蓄電デバイス |
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CN110621754B (zh) | 2021-03-05 |
EP3628717A4 (en) | 2020-07-22 |
PL3628717T3 (pl) | 2022-04-19 |
US20200189236A1 (en) | 2020-06-18 |
TWI758553B (zh) | 2022-03-21 |
JP6526368B1 (ja) | 2019-06-05 |
KR20190121865A (ko) | 2019-10-28 |
EP3628717B1 (en) | 2021-12-22 |
JPWO2019097887A1 (ja) | 2019-11-14 |
CN110621754A (zh) | 2019-12-27 |
KR102069476B1 (ko) | 2020-01-22 |
EP3628717A1 (en) | 2020-04-01 |
US10766229B2 (en) | 2020-09-08 |
TW201923012A (zh) | 2019-06-16 |
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