WO2019003977A1 - 接着剤組成物及びそれを用いた熱融着性部材 - Google Patents
接着剤組成物及びそれを用いた熱融着性部材 Download PDFInfo
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- WO2019003977A1 WO2019003977A1 PCT/JP2018/023087 JP2018023087W WO2019003977A1 WO 2019003977 A1 WO2019003977 A1 WO 2019003977A1 JP 2018023087 W JP2018023087 W JP 2018023087W WO 2019003977 A1 WO2019003977 A1 WO 2019003977A1
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- 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
- C08G18/753—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 one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—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 one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- 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
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- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7831—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing biuret groups
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- 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
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- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
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- C—CHEMISTRY; METALLURGY
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- 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
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- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
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- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7843—Nitrogen containing -N-C=0 groups containing urethane groups
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
- C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
- C08J5/125—Adhesives in organic diluents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- 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
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- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
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- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
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- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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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
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/16—Metal
- C09J2400/163—Metal in the substrate
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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
- C09J2423/00—Presence of polyolefin
- C09J2423/006—Presence of polyolefin in the substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- 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 composition and a heat-sealable member using the same, and can be used in various industrial product fields such as the electric field, the automobile field and the industrial field, and belongs to these technical fields.
- the adhesive composition of the hot melt type is used as processed into a film or sheet and used as an adhesive film or sheet in which the adhesive composition is laminated on the surface of a member, in the electric field, the automobile field and the industrial field Etc. are used in various industrial product fields.
- Various adhesive compositions have been proposed to bond metal members such as iron, aluminum, titanium and other metals, and their alloys used in these fields and molded articles made of polyolefin with poor adhesion. It is done.
- Patent Document 1 discloses an adhesive composition in which a component composed of a carboxylic acid-containing polyolefin, a carboxylic acid-containing epoxy resin, a polyisocyanate compound, and, if necessary, an epoxy resin is dissolved and dispersed in an organic solvent. It is done.
- Patent Document 2 discloses an adhesive composition containing a polyolefin having a carboxyl group or an acid anhydride group, a polyfunctional isocyanate compound and a solvent, and having a glass transition temperature, a melting point and a melting energy of the above-mentioned polyolefin at specific values. It is done.
- the adhesive compositions described in Patent Documents 1 and 2 have room for improvement in adhesiveness at room temperature (hereinafter referred to as “normal temperature peel strength”) at 5 N / 15 mm or more, which is a practical range, Adhesiveness at high temperatures of about ° C. (hereinafter referred to as “hot peel strength”) is insufficient.
- hot peel strength Adhesiveness at high temperatures of about ° C.
- the packaging material does not contact the electrolyte during normal use, but is prepared for an electrolyte at a high temperature of about 80 ° C.
- Adhesiveness after immersion hereinafter referred to as "electrolytic solution resistance" is necessary, but there is a problem of being insufficient.
- the present invention has high room temperature peel strength of 20 N / 15 mm or more and high hot peel strength of 10 N / 15 mm or more, and is excellent in adhesiveness, and is also excellent in electrolyte resistance even when used in a lithium ion battery packaging material It is an object of the present invention to provide an agent composition and a thermally fusible member using the same.
- the present inventors contain an organic solvent, a polyolefin having an acid group and / or an acid anhydride group that dissolves in the organic solvent, and two specific isocyanate compounds.
- the adhesive composition was found to be excellent in adhesiveness at high temperature peel strength and hot peel strength, and excellent in electrolyte resistance even when used for a packaging material for lithium ion batteries, and completed the present invention. .
- An adhesive composition comprising an organic solvent, a polyolefin (A) having an acid group and / or an acid anhydride group that dissolves in the organic solvent, and an isocyanate compound, wherein the isocyanate compound has 4 to 7 carbon atoms
- an adhesive composition comprising a diisocyanate compound having a hydrogen group and / or a derivative thereof (B), and a diisocyanate compound having a hydrocarbon group having a carbon number of 8 to 14 and / or a derivative thereof (C).
- the diisocyanate compound having a hydrocarbon group having 4 to 7 carbon atoms is hexamethylene diisocyanate.
- the diisocyanate compound having a hydrocarbon group having 8 to 14 carbon atoms is a diisocyanate compound having at least one or more secondary isocyanate groups.
- the diisocyanate compound having a hydrocarbon group having 8 to 14 carbon atoms is isophorone diisocyanate.
- a derivative of the diisocyanate compound having a hydrocarbon group having 4 to 7 carbon atoms and / or a diisocyanate having a hydrocarbon group having 8 to 14 carbon atoms contains at least one bond selected from the group consisting of isocyanurate bond, buret bond, urethane bond and allophanate bond.
- the component (A) is a polyolefin graft-modified with an acidic group-containing monomer and / or an acid anhydride group-containing monomer, and the graft thereof The amount is 0.10 to 30% by weight.
- the component (A) is a polyolefin grafted with an ester of an alkyl alcohol having 8 to 18 carbon atoms and (meth) acrylic acid.
- the grafting amount is 0.10 to 20% by weight.
- the weight average molecular weight of the component (A) is 15,000 to 200,000.
- an adhesive layer formed by curing the adhesive composition of the present invention, a metal layer bonded to one side of the adhesive layer, and the other of the adhesive layer A thermally fusible member is provided, which comprises: a thermally fusible resin layer joined to the surface side.
- a packaging material for a lithium ion battery comprising the heat-sealable member of the present invention.
- an adhesive composition having high cold peel strength and high hot peel strength and excellent adhesion, and excellent electrolytic resistance even when used for a packaging material for lithium ion batteries, and heat using the same A cohesive member is obtained.
- the present invention is an adhesive composition containing an organic solvent, a polyolefin (A) having an acid group and / or an acid anhydride group that dissolves in the organic solvent, and an isocyanate compound, wherein the isocyanate compound has 4 carbon atoms
- the present invention relates to an adhesive composition which is a diisocyanate compound having a hydrocarbon group of ⁇ 7 and / or a derivative thereof (B) and a diisocyanate compound having a hydrocarbon group having a carbon number of 8 to 14 and / or a derivative thereof (C).
- acrylic acid and / or methacrylic acid is referred to as (meth) acrylic acid.
- Component (A) is a polyolefin having an acid group and / or an acid anhydride group.
- a polyolefin modified with an acidic group-containing monomer and / or an acid anhydride group-containing monomer is preferable in that the normal temperature peel strength and the hot peel strength are high.
- a polyolefin modified with (meth) acrylic acid ester is further preferable in that it is excellent in solubility in organic solvents and compatibility with other resins.
- polyolefin constituent monomer unit of the component (A) examples include ethylene, propylene, and ⁇ -olefins such as 1-butene, isobutylene, 1-hexene and 1-octene.
- ethylene, propylene and 1-butene are preferred because they can improve the hot peel strength and the electrolytic solution resistance. preferable.
- the acidic group examples include a carboxylic acid group, a sulfonic acid group, a phosphoric acid group and the like.
- a carboxylic acid group is preferable in that it is easily modified.
- the acid anhydride group examples include a carboxylic acid anhydride group, a sulfonic acid anhydride group, a phosphoric acid anhydride group and the like, and among these, it is easy to obtain raw materials and easy to modify With carboxylic anhydride groups being preferred.
- a known method can be adopted as a method of modification. For example, the addition reaction of an acidic group-containing monomer and / or an acid anhydride group-containing monomer to a polyolefin in the presence of a known radical polymerization initiator such as an organic peroxide or an aliphatic azo compound in melt kneading or an organic solvent Graft modification, and copolymerization of an acid group-containing monomer and / or an acid anhydride group-containing monomer with an olefin.
- a known radical polymerization initiator such as an organic peroxide or an aliphatic azo compound in melt kneading or an organic solvent Graft modification
- the component (A) may be further graft modified with a (meth) acrylic acid alkyl ester, and as the (meth) acrylic acid alkyl ester, an alkyl alcohol having 8 to 18 carbon atoms and (meth) acrylic acid may be used. Esterified compounds (hereinafter referred to as "(meth) acrylic acid long chain alkyl ester”) are preferable.
- examples of the polyolefin as a raw material include polyethylene, polypropylene, propylene and ethylene. Random copolymers of propylene and ethylene, random copolymers of ethylene and ⁇ -olefins, block copolymers of ethylene and ⁇ -olefins, random copolymers of propylene and ⁇ -olefins, and propylene And block copolymers of ⁇ -olefin and the like.
- a propylene-ethylene copolymer, propylene in that hot peel strength and electrolytic solution resistance can be improved.
- Polypropylene polymers such as -1-butene copolymer and propylene-ethylene-1-butene copolymer are preferable.
- the propylene unit in the polyolefin is 50% by weight or more.
- reaction aid examples include styrene, o-methylstyrene, p-methylstyrene, ⁇ -methylstyrene, divinylbenzene, hexadiene and dicyclopentadiene.
- stabilizer examples include hydroquinone, benzoquinone and nitrosophenyl hydroxy compound.
- the acidic group-containing monomer as the raw material of the acidic group-containing monomer (A) component is a compound having an ethylenic double bond, a carboxylic acid group and the like in the same molecule, and various unsaturated monocarboxylic acid compounds, Examples thereof include unsaturated dicarboxylic acid compounds and unsaturated tricarboxylic acid compounds.
- unsaturated monocarboxylic acid compound examples include acrylic acid, methacrylic acid, crotonic acid and isocrotonic acid.
- unsaturated dicarboxylic acid compounds include maleic acid, itaconic acid, citraconic acid, tetrahydrophthalic acid, nadic acid and endic acid.
- Examples of unsaturated tricarboxylic acid compounds include aconitic acid and the like.
- unsaturated dicarboxylic acid compounds and unsaturated tricarboxylic acid compounds are preferable, and itaconic acid, maleic acid and aconitic acid are particularly preferable in that they are easily modified and excellent in adhesiveness.
- These acidic group-containing monomers may be used alone or in combination of two or more.
- the acid group-containing monomer used for modification When a part of the acid group-containing monomer used for modification is unreacted, it may be removed by a known method such as heating evaporation and reprecipitation purification, if necessary.
- the grafting amount is preferably 0.10 to 30% by weight based on the graft-modified product. 0.10 weight% or more is preferable, and 0.50 weight% or more is more preferable at the point which can maintain the solubility with respect to a solvent, and adhesiveness with respect to materials, such as a metal to-be-adhered body. Moreover, in the point which can acquire sufficient adhesiveness, 30 weight% or less is preferable, 20 weight% or less is more preferable, and 10 weight% or less is especially preferable.
- the grafting amount of the acidic group-containing monomer can be measured by a known method. For example, it can be determined by alkaline titration method or Fourier transform infrared spectroscopy.
- the acid anhydride group-containing monomer as a raw material of the acid anhydride group-containing monomer (A) component is a compound having an ethylenic double bond, a carboxylic acid anhydride group and the like in the same molecule, and the above unsaturated
- the acid anhydride of a monocarboxylic acid compound, the acid anhydride of the said unsaturated dicarboxylic acid compound, the acid anhydride of the said unsaturated tricarboxylic acid compound, etc. are mentioned.
- acid anhydride of the unsaturated monocarboxylic acid compound examples include acrylic acid anhydride, methacrylic acid anhydride, crotonic acid anhydride and isocrotonic acid anhydride.
- acid anhydrides of unsaturated dicarboxylic acid compounds include maleic anhydride, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, nadic anhydride and endic anhydride, etc. .
- acid anhydride of the unsaturated tricarboxylic acid compound examples include aconitic acid anhydride and the like.
- acid anhydrides of unsaturated dicarboxylic acid compounds and acid anhydrides of unsaturated tricarboxylic acid compounds are preferable in that they are easily modified and excellent in adhesiveness, and itaconic acid anhydride and maleic anhydride anhydride And aconitic acid anhydride are particularly preferred.
- These acid anhydride group-containing monomers may be used alone or in combination of two or more.
- the acid anhydride group-containing monomer used for modification When a part of the acid anhydride group-containing monomer used for modification is unreacted, it may be removed by a known method such as heating evaporation and reprecipitation purification, if necessary.
- the grafting amount is preferably 0.10 to 30% by weight with respect to the graft-modified product. 0.10 weight% or more is preferable, and 0.50 weight% or more is more preferable at the point which can maintain the solubility with respect to a solvent, and adhesiveness with respect to materials, such as a metal to-be-adhered body. Moreover, in the point which can acquire sufficient adhesiveness, 30 weight% or less is preferable, 20 weight% or less is more preferable, and 10 weight% or less is especially preferable.
- the grafting amount of the acid anhydride group-containing monomer can be measured by a known method. For example, it can be determined by alkaline titration method or Fourier transform infrared spectroscopy.
- (meth) acrylic acid long chain alkyl ester as a raw material of (meth) acrylic acid long chain alkyl ester (A) include octyl (meth) acrylate, lauryl (meth) acrylate, (meth) acrylic Octyl (meth) acrylate and (meth) acrylic acid in that they can be used to improve adhesion when using a poorly adherent nonpolar polyolefin resin as the adherend, such as tridecyl acid and stearyl (meth) acrylate. Preferred are lauryl and tridecyl (meth) acrylate.
- the grafting amount of the (meth) acrylic long-chain alkyl ester in the component (A) is preferably 0.10 to 20% by weight based on the graft modified product. 0.10 weight% or more is preferable at the point which can maintain the solubility with respect to the solvent of (A) component, compatibility with another resin, and adhesiveness favorably. In addition, 20% by weight or less is preferable, 10% by weight or less is more preferable, and 5.0% by weight or less is particularly preferable from the viewpoint of being able to maintain good adhesion.
- the grafting amount of the (meth) acrylic long-chain alkyl ester can be measured by a known method. For example, it can be determined by Fourier transform infrared spectroscopy or 1 H-NMR.
- the acidic group-containing monomer, the acid anhydride group-containing monomer, and a monomer other than the (meth) acrylic acid long-chain alkyl ester (hereinafter referred to as “the acid group-containing monomer Other monomers may be used in combination.
- the other monomers include (meth) acrylic acid esters other than the above, such as hydroxyethyl (meth) acrylate, benzyl (meth) acrylate, glycidyl (meth) acrylate and isocyanate-containing (meth) acrylic acid,
- the unsaturated monomer etc. which can be copolymerized with olefins, such as a styrene, a cyclohexyl vinyl ether, dicyclopentadiene, etc. are mentioned.
- the adhesion and solubility in solvents, and the grafting amount of the acid group-containing monomer, the acid anhydride group-containing monomer and the (meth) acrylic acid long chain alkyl ester can be further improved.
- the amount of the other monomer used does not exceed the total of the grafting amounts of the acid group-containing monomer, the acid anhydride group-containing monomer and the (meth) acrylic acid long chain alkyl ester.
- the component (A) may be a polyolefin having an acid group and / or an acid anhydride group, and an ethylenically unsaturated group, as long as the properties of the present invention are not impaired depending on the purpose.
- a method of introducing an ethylenically unsaturated group into the component (A) for example, a hydroxyl group-containing ethylenically unsaturated monomer such as hydroxyl ethyl (meth) acrylate for an acid group and / or an acid anhydride group, And a method of adding an epoxy group-containing ethylenic unsaturated monomer such as glycidyl (meth) acrylate.
- the weight average molecular weight of the component (A) is preferably 15,000 to 200,000. 15,000 or more is preferable and 30,000 or more is more preferable at the point which can improve normal temperature peel strength and electrolyte solution resistance. Moreover, in the point which can improve the solubility to the organic solvent in adhesive composition, 200,000 or less is preferable and 150,000 or less is more preferable.
- the weight average molecular weight is a value obtained by converting the molecular weight measured by gel permeation chromatography to polystyrene.
- the melting point of the component (A) is preferably 50 to 100 ° C. In the point which can acquire sufficient peel strength, 50 degreeC or more is preferable and 60 degreeC or more is more preferable. In addition, 100 ° C. or less is preferable, and 95 ° C. or less is more preferable in that sufficient storage stability at a low temperature can be obtained.
- the component (A) may be used alone or in combination of two or more.
- the content of the component (A) is preferably 80 to 100% by weight with respect to 100% by weight of the solid content of the adhesive composition, in terms of excellent hot peel strength and electrolytic solution resistance. More preferably, it is 90 to 100% by weight.
- isocyanate compound of the present invention a diisocyanate compound having a hydrocarbon group having 4 to 7 carbon atoms and / or a derivative thereof (B) and a diisocyanate compound having a hydrocarbon group having 8 to 14 carbon atoms and / or the same
- the derivative (C) is used in combination.
- the component (B) has the effect of improving the adhesion to the adherend, and the component (C) has good compatibility with the component (A), so it has a high function of raising the crosslink density of the cured product and is hot It has the effect of improving the peel strength.
- Component (B) is a diisocyanate compound having a hydrocarbon group of 4 to 7 carbon atoms (hereinafter referred to as “component (b)”) and / or a derivative thereof.
- component (b) examples include hexamethylene diisocyanate, pentamethylene diisocyanate, tetramethylene diisocyanate and the like, and the component (b) has a high effect of improving the adhesion to the adherend, and is particularly suitable. Methylene diisocyanate is preferred.
- the derivative of the component (b) is preferably a compound containing at least one bond selected from the group consisting of isocyanurate bond, buret bond, urethane bond and allophanate bond, and the effect of improving the adhesion to the adherend
- the compound having an isocyanurate bond is particularly preferable in that it is high and the cold peel strength and the electrolytic solution resistance can be improved.
- the derivative of the component (b) may have a urea bond and / or a uretdione bond.
- a commercial item can be used as a derivative of (b) component.
- Duranate TPA-100 made by Asahi Kasei Co., Ltd.
- Duranate MFA-75B made by Asahi Kasei Co., Ltd.
- Duranate TUL-100 made by Asahi Kasei Co., Ltd.
- Duranate TSA And -100 manufactured by Asahi Kasei Corp.
- Coronate HX manufactured by Tosoh Corp.
- Takenate D-170N manufactured by Mitsui Chemicals, Inc.
- Duranate 24A-100 manufactured by Asahi Kasei Corp.
- Duranate 21S-75E manufactured by Asahi Kasei Corp.
- Takenate D-165NN manufactured by Mitsui Chemical Co., Ltd.
- Des Module N3200 made by Sumika Bayer Urethane Co., Ltd.
- Duranate P301-75E (made by Asahi Kasei Co., Ltd.) which is an adduct of hexamethylene diisocyanate and trimethylol propane, and Sumidur HT (made by Sumika Bayer Urethane Co., Ltd.) etc. Can be mentioned.
- Desmodur XP2580 (made by Sumika Bayer Urethane Co., Ltd.) etc. are mentioned.
- component (C) is a diisocyanate compound having a hydrocarbon group having 8 to 14 carbon atoms (hereinafter referred to as “component (c)”) and / or a derivative thereof.
- component (c) examples include diisocyanate compounds having one secondary isocyanate group such as isophorone diisocyanate and norbornane diisocyanate, and secondary isocyanate groups such as 4,4'-methylenebis (cyclohexyl isocyanate) and the like. And diisocyanate compounds having no secondary isocyanate group such as dodecane diisocyanate and 1,3-bis (isocyanatomethyl) cyclohexane.
- diisocyanate compounds having one secondary isocyanate group such as isophorone diisocyanate and norbornane diisocyanate
- secondary isocyanate groups such as 4,4'-methylenebis (cyclohexyl isocyanate) and the like.
- diisocyanate compounds having no secondary isocyanate group such as dodecane diisocyanate and 1,3-bis (isocyanatomethyl) cyclohexane.
- a diisocyanate compound having at least one or more secondary isocyanate groups is preferable in that the effect of improving the electrolytic solution resistance is high, and among these, isophorone diisocyanate is particularly preferable.
- a compound containing at least one bond selected from the group consisting of isocyanurate bond, buret bond, urethane bond and allophanate bond is preferable, and it is high in the effect of improving the hot peel strength.
- Particularly preferred are compounds containing an isocyanurate bond.
- the derivative of the component (c) may have a urea bond and / or a uretdione bond.
- a commercial item can be used as a derivative of (c) component.
- Examples of commercially available compounds having a compound having an isocyanurate bond include Desmodur Z4470 BA (manufactured by Sumika Bayer Urethane Co., Ltd.) and Duranate T4900-70B (manufactured by Asahi Kasei Co., Ltd.).
- Desmodur Z4470 BA manufactured by Sumika Bayer Urethane Co., Ltd.
- Duranate T4900-70B manufactured by Asahi Kasei Co., Ltd.
- Desmodule XP2565 made by Sumika Bayer Urethane Co., Ltd.
- the weight ratio of the component (A) to the isocyanate compound in the adhesive composition of the present invention is not particularly limited, but the equivalent ratio of the isocyanate group of the isocyanate compound to the carboxylic acid group of the component (A) (NCO / OH) Is preferably 0.01 to 12.0. 0.01 or more is preferable, 0.04 or more is more preferable, and 0.1 or more is particularly preferable in that the initial adhesiveness can be excellent. In addition, 12.0 or less is preferable and 9.0 is more preferable in that it can form a cured product having a sufficient crosslinking density and excellent flexibility.
- the component (B) is preferably 10 to 80% by weight, more preferably 20 to 50% by weight, and from the point of being highly effective in raising the crosslink density of the cured product and improving hot peel strength (C).
- the content of the component is preferably 20 to 90% by weight, more preferably 50 to 80% by weight.
- Organic solvent In the adhesive composition of the present invention, the organic solvent is blended for the purpose of dissolving the component (A).
- organic solvent examples include aromatic organic solvents such as toluene and xylene, aliphatic organic solvents such as n-hexane, alicyclic organic solvents such as cyclohexane, methylcyclohexane and ethylcyclohexane, acetone, methyl ethyl ketone and the like Ketone-based organic solvents, alcohol-based organic solvents such as methanol and ethanol, ester-based organic solvents such as ethyl acetate and butyl acetate, and propylene glycol ethers such as propylene glycol methyl ether, propylene glycol ethyl ether and propylene glycol t-butyl ether And organic solvents and the like.
- aromatic organic solvents such as toluene and xylene
- aliphatic organic solvents such as n-hexane
- alicyclic organic solvents such as cyclohexane, methylcycl
- the organic solvent may be used alone or in combination of two or more.
- organic solvent preferred is an organic solvent which is easy to evaporate and remove by removing the adhesive composition, and in particular, a mixed solvent of an alicyclic organic solvent and an ester or ketone organic solvent. Is preferred. Further, it is preferable not to use an aromatic organic solvent from the viewpoint of the solubility of the component (A) and environmental problems.
- the weight ratio of the organic solvent to the component (A) is not particularly limited, and this weight ratio can be set according to the types of the organic solvent and the modified polyolefin resin.
- the content of the component (A) is preferably 5 to 25% by weight, particularly preferably 10 to 20% by weight, based on 100% by weight of the total of the organic solvent and the component (A). With such a content, the adhesive composition can be easily applied to the adherend, and the workability is excellent.
- the adhesive composition of the present invention contains an organic solvent and the components (A) to (C), but various components can be blended according to the purpose.
- curing catalysts As other components, specifically, curing catalysts, styrenic thermoplastic elastomers, tackifiers, antioxidants, hindered amine light stabilizers, ultraviolet light absorbers, antistatic agents, flame retardants, colorants, dispersants, There may be mentioned adhesion promoters, antifoaming agents, leveling agents, plasticizers, lubricants and fillers.
- the curing catalyst can be blended for the purpose of promoting the crosslinking reaction between the component (A) and the isocyanate compound to obtain excellent adhesion performance.
- the adhesive composition of the present invention preferably further contains a curing catalyst from the viewpoint of ease of curing and adhesion performance, and as the curing catalyst, organotin compounds, tertiary amines and the like are preferred.
- organotin compound examples include dibutyltin dilaurate, dibutyltin dimaleate, dioctyltin dilaurate, and dialkyl tin fatty acids having 3 to 10 carbon atoms in the alkyl group such as dioctyltin dimaleate.
- tertiary amines include tetraalkylethylenediamines such as tetramethylethylenediamine; N, N'-dialkylbenzylamines such as dimethylbenzylamine; triethylenediamine, pentamethyldiethylenetriamine, N-ethylmorphylin, N-methyl moles And phylin, 1-methyl-4-dimethylamine ethyl piperazine and diazabicycloundecene.
- tetraalkylethylenediamines such as tetramethylethylenediamine
- N, N'-dialkylbenzylamines such as dimethylbenzylamine
- triethylenediamine pentamethyldiethylenetriamine
- N-ethylmorphylin N-methyl moles And phylin
- 1-methyl-4-dimethylamine ethyl piperazine and diazabicycloundecene 1-methyl-4-dimethylamine ethyl piperazine and di
- an organotin compound and a tertiary amine can also be used in combination.
- the content of the curing catalyst is preferably 0.001 to 5 parts by weight with respect to 100 parts by weight of the total amount of the components (A) to (C).
- the styrene-based thermoplastic elastomer can be blended for the purpose of improving adhesion.
- styrene-based thermoplastic elastomer examples include styrene-butadiene copolymer, epoxy-modified styrene-butadiene copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene / propylene-styrene block copolymer (described below) , “SEPS”), styrene-ethylene / butylene-styrene block copolymer (hereinafter “SEBS”), styrene-isoprene / butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, etc.
- Styrene resin etc. are mentioned, and even if it is a thing which does not have an acidic group and an acid anhydride group, it may have an acid group and / or an acid anhydride group
- a publicly known method can be adopted as a modification method for introducing an acidic group and / or an acid anhydride group.
- graft modification such as melt-kneading the acid group-containing monomer and / or the acid anhydride group-containing monomer with the styrene resin in the presence of a radical polymerization initiator such as an organic peroxide or an aliphatic azo compound Etc.
- a known method can be employed as a modification method for introducing an amino group.
- terminal modification such as addition of an amino group-containing compound to the living end of the styrene resin obtained by living anionic polymerization, or in the presence of a radical polymerization initiator such as an organic peroxide or aliphatic azo compound.
- graft modification such as melt-kneading an amine compound having an unsaturated bond such as-(1-cyclohexenyl) ethylamine with the styrene resin.
- SEPS and SEBS are preferable in that they can improve adhesion.
- Tackifiers Tackifiers can be formulated for the purpose of improving adhesion.
- tackifiers known ones can be used, and polyterpene resins, rosin resins, aliphatic petroleum resins, alicyclic petroleum resins, copolymer petroleum resins, hydrogenated petroleum resins and the like are listed.
- polyterpene resins include ⁇ -pinene polymers, ⁇ -pinene polymers, and copolymers of these with phenol or bisphenol A and the like.
- rosin-based resin examples include natural rosin, polymerized rosin and ester derivatives thereof.
- a specific example of the aliphatic petroleum resin is also referred to as a C5 resin, and is generally a resin synthesized from the C5 fraction of petroleum.
- the alicyclic petroleum resin is also referred to as a C9 resin, and is generally a resin synthesized from a C9 fraction of petroleum.
- copolymerized petroleum resin examples include C5 / C9 copolymer resin and the like.
- Hydrogenated petroleum resins are generally produced by hydrogenation of the various petroleum resins described above.
- the content of the tackifier is preferably 1 to 20% by weight, more preferably 1 to 10% by weight with respect to 100% by weight of the adhesive composition, in terms of excellent hot water resistance. is there.
- Adhesive Composition The adhesive composition of the present invention comprises an organic solvent and the components (A) to (C) as essential components.
- the viscosity at 25 ° C. of the adhesive composition of the present invention is preferably 10 to 5,000 mPa ⁇ s. In the point which is excellent in coating property, 10 mPa * s or more is preferable. Moreover, in the point which is excellent in leveling property, 5,000 mPa * s or less is preferable, and 1,000 mPa * s or less is more preferable.
- the adhesive composition of the present invention is suitable for adhesion between a polyolefin resin molded product and another member (a metal member, a resin member, etc.), and polyolefins such as polyolefin resin films, etc. It can also be used for adhesion between a resin film and a metal foil made of aluminum or the like, adhesion between a polyolefin resin film, and a metal layer in a composite film provided with a resin layer and a metal layer.
- the adhesive layer obtained from the adhesive composition of the present invention is preferably used as a packaging material for lithium ion batteries because it has high room temperature peel strength and high hot peel strength and is excellent in adhesiveness and has high electrolytic solution resistance. Can.
- the adhesive composition of the present invention can be produced by a known method.
- the solution obtained by dissolving the component (A) in an organic solvent and the other components excluding the isocyanate compound are mixed, and then the obtained mixture is mixed with the isocyanate compound.
- the temperature at the time of mixing is generally 40 ° C. or less, preferably 10 ° C. to 30 ° C.
- Heat fusible member The heat fusible member of the present invention comprises an adhesive layer formed by curing the adhesive composition of the present invention, a metal layer bonded to one side of the adhesive layer, and an adhesive layer. And a thermally fusible resin layer bonded to the other side.
- a schematic view of the heat fusible member of the present invention is shown in FIGS. 1 and 2. That is, the thermally fusible member 1 of FIG. 1 includes the thermally fusible resin layer 11, the adhesive layer 12, and the metal layer 13 sequentially. Further, the heat-fusible member 1 of FIG. 2 includes a heat-fusible resin layer 11, an adhesive layer 12, a metal layer 13 and another layer 14 in order.
- the shape of the heat-sealable member of the present invention may be appropriately set according to the application etc., and is not particularly limited, and film-like, sheet-like, plate-like, angle-like and rod-like may be mentioned.
- the thermally fusible resin layer is a layer that contains a resin that can be melted by heat and fuse the material that forms the layer on the one side and the material that forms the layer on the other side.
- the heat-fusible resin layer is preferably a layer containing a resin that melts at a temperature of 50 ° C. to 200 ° C.
- resin which has such a property polyolefin resin, a polyamide resin, a polyester resin, etc. are mentioned. Among these, polyolefin resins are preferable because they can be heat-sealed with sufficient strength.
- a polyolefin resin a polypropylene is preferable. In particular, in the case where a heat fusible member is used to be integrated with another member, non-oriented polypropylene is more preferable because the dimensional change (shrinkage) is small.
- the above-mentioned heat sealable resin layer is, if necessary, a lubricant, a filler, a heat stabilizer, an antioxidant, an ultraviolet absorber, an antistatic agent, a flame retardant, a coloring agent, a dispersant, an adhesion imparting agent, etc.
- the layer may contain an additive of
- the thickness of the heat-fusible resin layer is not particularly limited depending on the material of the resin and the like, but in the case of a layer containing non-oriented polypropylene, for example, preferably 10 to 200 ⁇ m, more preferably 20 to 100 ⁇ m. It is. If the thickness of the layer containing non-oriented polypropylene is 10 to 200 ⁇ m, it is not easily broken, and a heat-sealed composite product such as a highly durable sealed container can be obtained.
- the above-mentioned adhesive layer is a layer formed by curing the adhesive composition of the present invention.
- the thickness of the adhesive layer is not particularly limited, but is preferably 1 to 20 ⁇ m, particularly preferably 2 to 10 ⁇ m. When the thickness of the adhesive layer is 1 to 20 ⁇ m, processing such as bending when the heat-sealable member is in the form of a sheet, for example, is easy.
- the above metal layer is a layer containing a metal or an alloy.
- metals or alloys include aluminum, iron, titanium, magnesium, copper, nickel, chromium and other metals, and alloys thereof. Among these, aluminum is preferable because of its excellent processability.
- the thickness of the metal layer is not particularly limited depending on the material and the like. When the metal layer is made of, for example, aluminum, it is preferably 20 to 100 ⁇ m, particularly preferably 20 to 80 ⁇ m, and further preferably 30 to 60 ⁇ m.
- the heat-sealable member of the present invention includes a metal layer, as shown in FIG. 2, another layer 14 can be provided on the surface of the metal layer 13.
- the material which comprises another layer contains resin from a viewpoint of protecting a metal layer.
- the other layers are preferably resin layers.
- the resin is not particularly limited, and may be a polyamide resin, a polyester resin, or the like.
- the transparency of the resin layer is not particularly limited, but when the resin layer is transparent or translucent, excellent appearance can be obtained when the heat-sealed composite product is a sealed container or the like.
- the thickness of the other layer is not particularly limited, and is preferably 30 to 60 ⁇ m, particularly preferably 30 to 50 ⁇ m.
- the heat-sealable member using the adhesive composition of the present invention has high room temperature peel strength and high hot peel strength, is excellent in adhesiveness, and is also excellent in resistance to solvents such as electrolytic solution, so that its structure is maintained At the same time, deterioration of the contents can be prevented.
- the method of producing the heat-bonding member shown in FIG. 1 is as follows. (1) The adhesive composition is applied to the surface of a metal foil, metal film or the like for forming the metal layer 13, and then the organic solvent in the composition is removed to form the adhesive layer 12, and then, A method of pressure bonding while bringing a resin film for forming a heat fusible resin layer 11 (hereinafter referred to as “heat fusible resin film”) in contact with the surface on which the adhesive layer 12 is formed and heating while heating. (2) The adhesive composition is applied to the surface of the heat-fusible resin film, and then the organic solvent in the composition is removed to form the adhesive layer 12, and then the adhesive layer 12 is formed. A method in which a metal foil or the like for forming the metal layer 13 is brought into contact with the rough surface and pressure-bonded while heating.
- the manufacturing method of the heat-fusible member shown by FIG. 2 is as follows. (3) The adhesive composition is applied to the surface of the metal layer 13 in a composite film having a resin layer constituting another layer 14 and the metal layer 13 formed by vapor deposition or the like on one side of the resin layer. Then, the organic solvent in the composition is removed to form the adhesive layer 12, and then the surface on which the adhesive layer 12 is formed is brought into contact with the heat fusible resin film, and pressure bonding is performed while heating. how to. (4) The adhesive composition is applied to the surface of the heat-fusible resin film, and then the organic solvent in the composition is removed to form the adhesive layer 12, and then the adhesive layer 12 is formed.
- the adhesive composition is often applied to the surface of the metal layer in a composite film provided with a metal layer forming material such as a metal foil or a metal layer and another layer (resin layer), but is not particularly limited.
- a metal foil it is preferable to use an aluminum foil having a thickness of 20 to 100 ⁇ m.
- a metal layer contains aluminum and another layer (resin layer) contains a polyamide resin, a polyester resin, etc.
- a polyolefin resin film, a polyamide resin film, a polyester resin film, etc. can be used as a heat sealing
- These resin films can be films obtained by film forming methods such as an extrusion method, a cast molding method, a T-die method and an inflation method.
- the thickness of the heat fusible resin film is usually 10 to 200 ⁇ m.
- a polyolefin resin film is preferable in that it can be easily heat-sealed to complete a heat-sealable member and heat-sealed at the time of producing a heat-sealed composite product.
- a non-oriented polypropylene film is particularly preferable in that a heat-sealed composite product such as a sealing container having excellent durability can be obtained.
- the preferred thickness is 10 to 200 ⁇ m, more preferably 20 to 100 ⁇ m.
- the adhesive composition can be applied by a conventionally known method, and can be applied using, for example, a bar coater and a gravure coater.
- the thickness of the coating and the drying temperature thereof are not particularly limited.
- the drying temperature of the coating film is not particularly limited, and is preferably 30 ° C. to 100 ° C. from the viewpoint of workability.
- the two members can be bonded without heating, but in the case of producing the heat-fusible member of the present invention
- a method such as pressure bonding can be applied to the above while heating to a temperature taking into consideration the melting point and the melt viscosity of the resin component based on the modified polyolefin resin.
- the heating condition and the pressure bonding condition are, for example, a temperature of 180 ° C., a pressure of 0.3 MPa, and a pressure bonding time of 2 seconds.
- the conditions (hereinafter referred to as “aging conditions") for promoting the crosslinking reaction of the component (A) and the isocyanate compound to complete the heat-fusible member are not particularly limited, and the material of the metal foil and It is preferable to set according to the material of a heat-fusible resin film, a melting temperature, etc., the composition of an adhesive bond layer, etc. Aging conditions may be heating at 40 ° C.
- curing may be used together with active energy ray curing such as ultraviolet rays and electron beams.
- the heat sealable members of the present invention can be used in various industrial product fields, such as the electric field, the automobile field, the industrial field and other fields.
- Examples of applications in the field of electricity include: packaging materials for secondary batteries such as lithium ion batteries and lithium ion polymer batteries, mobile devices, displays by attaching decorative sheets in television housings, white goods housings, etc., metal members And bonding of resin and sealing of electronic parts.
- secondary batteries such as lithium ion batteries and lithium ion polymer batteries
- mobile devices displays by attaching decorative sheets in television housings, white goods housings, etc.
- metal members And bonding of resin and sealing of electronic parts.
- Examples of applications in the automotive field include adhesion of exterior materials consisting of metal members / resins in interior and exterior members such as pillars, moldings, door trims, spoilers and roofs, real leather, fabrics, instrument panel foam sheets and decorative sheets and bases There is adhesion of material.
- Examples of applications in the industrial field include adhesion between films of multilayer films such as industrial packaging materials and barrier films.
- Examples of applications in other fields include adhesion of logistics materials, housing materials, household sundries and sports goods.
- lithium ion battery packaging materials are preferable because they have high room temperature peel strength and high hot peel strength and excellent adhesion and high electrolytic solution resistance. .
- component A1 A reaction product
- reaction mixture 1.5 parts by weight of aconitic acid anhydride, 3 parts by weight of octyl acrylate, and 0.5 parts by weight of benzoyl peroxide were added dropwise over 3 hours, respectively, and allowed to react for 1 hour.
- the reaction mixture is cooled to room temperature, and the crude reaction product is poured into a large excess of acetone to remove unreacted aconitic acid anhydride and octyl acrylate to obtain a reaction product (hereinafter referred to as "A2 component").
- A2 component reaction product
- Weight average molecular weight device HLC-8220GPC (manufactured by Tosoh Corporation) Column: Two TSKgel GMHXL (made by Tosoh Corporation) Column temperature: 40 ° C Eluent: Tetrahydrofuran 1.00 ml / min Detector: RI The molecular weight measured by GPC was converted based on the molecular weight of polystyrene.
- Graft amount of A1 (% by weight) acid number ⁇ 99.1 ⁇ 100 / (1000 ⁇ 56.1 ⁇ 2)
- Graft amount of A2 (% by weight) acid number ⁇ 157.1 ⁇ 100 / (1000 ⁇ 56.1 ⁇ 3)
- Graft amount of A3 (% by weight) acid number ⁇ 113.1 ⁇ 100 / (1000 ⁇ 56.1 ⁇ 2)
- Method of Measuring Acid Value The acid value indicates the number of milligrams of potassium hydroxide required to neutralize the acid contained in 1 g of the sample, and was measured according to JIS K 0070: 1992.
- 0.2 g of a sample to be measured is precisely weighed in a stoppered Erlenmeyer flask, 20 ml of tetrahydrofuran is added, and the solution is dissolved while heating to obtain a sample solution. Then, add a few drops of 1 w / v% phenolphthalein ethanol solution as an indicator to this sample solution, and use a 0.1 mol / L ethanol solution of potassium hydroxide as a titrant to maintain a pink color lasting for 10 seconds The titration was performed until it exhibited, and the acid value was calculated according to the following equation.
- Acid value (mg KOH / g) (T ⁇ F ⁇ 56.1 ⁇ 0.1) / W
- T represents a titration amount (mL)
- F represents a factor of the titration solution
- W represents a sampling amount (g).
- the infrared absorption spectra of the above three types of films are measured by Fourier transform infrared spectroscopy, and the absorbance ratios Y 1 , Y 2 and Y 3 are determined according to the following equation, and calibration with respect to the concentrations C 1 , C 2 and C 3 I made a line.
- Absorbance ratio Y (absorbance derived from ester carbonyl stretching vibration (1730 ⁇ 10 cm ⁇ 1 )) / (absorbance derived from CH deflection vibration (1380 ⁇ 10 cm ⁇ 1 ) of CH 3 ) Y 1 : Y at concentration C 1 Y 2 : Y at concentration C 2 Y 3 : Y at concentration C 3
- the infrared spectra of the reaction products A1 to A3 are measured to determine the absorbance ratios Y A1 (Y of the reaction product A1), Y A2 (Y of the reaction product A2) and Y A3 (Y of the reaction product A3).
- the grafting amount of the (meth) acrylic long-chain alkyl ester of the reactants A1 to A3 was calculated according to the following equation based on the calibration curve.
- Examples 1 to 14 and Comparative Examples 1 to 8 1) Preparation of adhesive composition
- the component (A) and the organic solvent shown in the following Table 2 were charged into a flask having an inner volume of 300 ml provided with a condenser and a stirrer, and stirred at 60 ° C. for 10 minutes to obtain a solution. After cooling to room temperature, a reaction accelerator was added to the solution and mixed to obtain a liquid resin composition. Subsequently, the isocyanate compound (B) component and / or (C) component shown in Table 2 were mix
- Table 2 mean parts by weight.
- the abbreviations in Table 2 mean the following.
- ⁇ DBTL Dibutyltin dilaurate, manufactured by ADEKA Co., Ltd., Adekastab BT-11 TPA 100: An isocyanurate of hexamethylene diisocyanate (having a hydrocarbon group having 6 carbon atoms), Duranate TPA-100 manufactured by Asahi Kasei Co., Ltd.
- N3200 a burette of hexamethylene diisocyanate (having a hydrocarbon group having 6 carbon atoms), Desmodur N3200 manufactured by Sumika Bayer Urethane Co., Ltd.
- ⁇ HT An adduct of hexamethylene diisocyanate (having a hydrocarbon group having 6 carbon atoms) and trimethylolpropane, Sumizole HT manufactured by Sumika Bayer Urethane Co., Ltd.
- XP2580 an allophanate of hexamethylene diisocyanate (having a hydrocarbon group having 6 carbon atoms), Desmodure XP2580 manufactured by Sumika Bayer Urethane Co., Ltd.
- HDI hexamethylene diisocyanate (having a hydrocarbon group having 6 carbon atoms)
- TMDI tetramethylene diisocyanate (having a hydrocarbon group of 4 carbon atoms)
- Z4470 An isocyanurate of isophorone diisocyanate (having a hydrocarbon group having 10 carbon atoms), Desmodur Z4470 BA manufactured by Sumika Bayer Urethane Co., Ltd.
- XP2565 allophanate of isophorone diisocyanate (having a hydrocarbon group having 10 carbon atoms), Desmodur XP2565 manufactured by Sumika Bayer Urethane Co., Ltd.
- D 140 N An adduct of isophorone diisocyanate (having a hydrocarbon group having 10 carbon atoms) and trimethylolpropane, Takenate D-140 N manufactured by Mitsui Chemicals, Inc.
- EPDC 1241 A mono-adduct of isophorone diisocyanate (having a hydrocarbon group having 10 carbon atoms) and hydroxyethyl acrylate, Evanic Japan Ltd.
- the bonding conditions at this time were a temperature of 180 ° C., a pressure of 0.3 MPa, and a pressure bonding time of 2 seconds. Thereafter, the integrated product was placed in a hot air circulating oven adjusted to 40 ° C. for 3 days to obtain a test piece.
- Adhesiveness [Normal temperature peel strength] The test piece is cut to a width of 15 mm, and the normal temperature peel strength (measurement temperature 25 ° C.) between the aluminum foil and CPP is measured by a T peel test (tensile speed 100 mm / min), and evaluated at the following three levels. went. The results are shown in Table 2.
- Electrolyte resistant solution As electrolyte solution, ethylene carbonate, diethyl carbonate and dimethyl carbonate are mixed in a ratio of 1: 1: 1 (weight ratio), to which lithium hexafluorophosphate is added at a concentration of 1 mol / L. Was used. After immersing the test piece in an electrolytic solution at 80 ° C. for 8 days, the normal temperature peel strength (measurement temperature 25 ° C.) between the aluminum foil and CPP is measured by a T peel test (tensile speed 100 mm / min), and The evaluation was made on three levels. The results are shown in Table 2. ⁇ : 15 N / 15 mm or more ⁇ : 10 N / 15 mm or more, less than 15 N / 15 mm ⁇ : less than 10 N / 15 mm
- the adhesive composition of the present invention has high room temperature peel strength of at least 20 N / 15 mm and high hot peel strength of at least 10 N / 15 mm. In addition to the above, the electrolyte resistance was also excellent.
- the adhesive compositions of Comparative Examples 1 to 8 contain the component (A), but contain only the component (B) or the component (C) as an isocyanate compound, so the room temperature peel strength or Either of the hot peel strength was low and the adhesion was inferior.
- the present invention relates to an adhesive composition and a heat-sealable member using the same, and can be used in various industrial product fields such as the electric field, the automobile field and the industrial field, and belongs to these technical fields.
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Abstract
Description
これら分野で用いられる、鉄、アルミニウム、チタン及びその他金属等、並びにそれらの合金等の金属部材と、接着性に乏しいポリオレフィンからなる成形体とを接着するために、各種の接着剤組成物が提案されている。
特許文献1には、カルボン酸含有ポリオレフィンと、カルボン酸含有エポキシ樹脂と、ポリイソシアネート化合物と、必要に応じてエポキシ樹脂とからなる成分を有機溶剤に溶解、分散させてなる接着剤組成物が開示されている。
特許文献2には、カルボキシル基又は酸無水物基を有するポリオレフィン、多官能イソシアネート化合物及び溶剤を含有し、上記ポリオレフィンのガラス転移温度、融点及び融解エネルギーが特定の値である接着剤組成物が開示されている。
また、これらの接着剤組成物を用いてリチウムイオン電池用包装材料を製造した場合、当該包装材料は通常の使用時には電解液に接触しないものの、異常時に備えて80℃程度の高温の電解液に浸漬した後の接着性(以下、「耐電解液性」という。)が必要であるが、不十分という問題があった。
本発明は、常温剥離強度が20N/15mm以上、かつ、熱間剥離強度が10N/15mm以上と高く接着性に優れる上、リチウムイオン電池用包装材料に用いた場合でも耐電解液性に優れる接着剤組成物及びそれを用いた熱融着性部材を提供することを目的とする。
有機溶剤、当該有機溶剤に溶解する酸性基及び/又は酸無水物基を有するポリオレフィン(A)、並びにイソシアネート化合物を含有する接着剤組成物であって、前記イソシアネート化合物が炭素数4~7の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(B)、並びに炭素数8~14の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(C)を含む接着剤組成物を提供する。
上記本発明の接着剤組成物の好ましい実施形態によれば、前記炭素数4~7の炭化水素基を有するジイソシアネート化合物はヘキサメチレンジイソシアネートである。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記炭素数8~14の炭化水素基を有するジイソシアネート化合物は、2級のイソシアネート基を少なくとも1個以上有するジイソシアネート化合物である。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記炭素数8~14の炭化水素基を有するジイソシアネート化合物はイソホロンジイソシアネートである。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記炭素数4~7の炭化水素基を有するジイソシアネート化合物の誘導体及び/又は前記炭素数8~14の炭化水素基を有するジイソシアネート化合物の誘導体は、イソシアヌレート結合、ビュレット結合、ウレタン結合及びアロファネート結合からなる群より選択される少なくとも1つの結合を含む。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記(A)成分は、酸性基含有モノマー及び/又は酸無水物基含有モノマーでグラフト変性されたポリオレフィンであって、そのグラフト量が0.10~30重量%である。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記(A)成分は、炭素数8~18のアルキルアルコールと(メタ)アクリル酸とのエステル化物でグラフト変性されたポリオレフィンであって、そのグラフト量が0.10~20重量%である。
上記本発明の接着剤組成物の他の好ましい実施形態によれば、前記(A)成分の重量平均分子量は、15,000~200,000である。
上記本発明の他の局面によれば、上記本発明の接着剤組成物が硬化してなる接着剤層と、当該接着剤層の一面側に接合された金属層と、当該接着剤層の他面側に接合された熱融着性樹脂層とを備えることを特徴とする熱融着性部材が提供される。
上記本発明のさらに他の局面によれば、上記本発明の熱融着性部材を含むリチウムイオン電池用包装材料が提供される。
以下、(A)成分、(B)成分、(C)成分、有機溶剤、その他成分、接着剤組成物、接着剤組成物の製造方法、熱融着性部材、熱融着性部材の製造方法及び用途について説明する。
尚、本明細書においては、アクリル酸及び/又はメタクリル酸を(メタ)アクリル酸と表す。
(A)成分は、酸性基及び/又は酸無水物基を有するポリオレフィンである。
(A)成分の原料となる酸性基含有モノマーとしては、エチレン性二重結合及びカルボン酸基等とを、同一分子内に持つ化合物であり、各種の不飽和モノカルボン酸化合物、 不飽和ジカルボン酸化合物及び不飽和トリカルボン酸化合物等が挙げられる。
(A)成分の原料となる酸無水物基含有モノマーとしては、エチレン性二重結合及びカルボン酸無水物基等とを、同一分子内に持つ化合物であり、前記不飽和モノカルボン酸化合物の酸無水物、前記不飽和ジカルボン酸化合物の酸無水物及び前記不飽和トリカルボン酸化合物の酸無水物等が挙げられる。
(A)成分の原料となる(メタ)アクリル酸長鎖アルキルエステルの具体例としては、(メタ)アクリル酸オクチル、(メタ)アクリル酸ラウリル、(メタ)アクリル酸トリデシル、及び(メタ) アクリル酸ステアリル等が挙げられ、難接着性非極性ポリオレフィン樹脂を被着体とする場合の接着性を向上できる点で、(メタ)アクリル酸オクチル、(メタ)アクリル酸ラウリル及び(メタ)アクリル酸トリデシルが好ましい。
(A)成分にエチレン性不飽和基を導入する方法としては、例えば、酸性基及び/又は酸無水物基に対して、ヒドロキシルエチル(メタ)アクリレート等の水酸基含有エチレン性不飽和単量体、及び(メタ)アクリル酸グリシジル等のエポキシ基含有エチレン性不飽和単量体を付加させる方法等が挙げられる。
本発明のイソシアネート化合物としては、炭素数4~7の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(B)と、炭素数8~14の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(C)を併用する。
(B)成分は、炭素数4~7の炭化水素基を有するジイソシアネート化合物(以下、「(b)成分」という。)及び/又はその誘導体である。
イソシアヌレート結合を有する化合物の市販品としては、デュラネートTPA-100(旭化成(株)製)、デュラネートMFA-75B(旭化成(株)製)、デュラネートTUL-100(旭化成(株)製)、デュラネートTSA-100(旭化成(株)製)、コロネ-トHX(東ソー(株)製)、及びタケネートD-170N(三井化学(株)製)等が挙げられる。
ビュレット結合を有する化合物の市販品としては、デュラネート24A-100(旭化成(株)製)、デュラネート21S-75E(旭化成(株)製)、タケネートD-165NN(三井化学(株)製)、及びデスモジュールN3200(住化バイエルウレタン(株)製)等が挙げられる。
ウレタン結合を有する化合物の市販品としては、ヘキサメチレンジイソシアネートとトリメチロールプロパンとのアダクト体であるデュラネートP301-75E(旭化成(株)製)及びスミジュールHT(住化バイエルウレタン(株)製)等が挙げられる。
アロファネート結合を有する化合物の市販品としては、デスモジュールXP2580(住化バイエルウレタン(株)製)等が挙げられる。
(C)成分は、炭素数8~14の炭化水素基を有するジイソシアネート化合物(以下、「(c)成分」という。)及び/又はその誘導体である。
イソシアヌレート結合を有する化合物の市販品としては、デスモジュールZ4470 BA(住化バイエルウレタン(株)製)及びデュラネートT4900-70B(旭化成(株)製)等が挙げられる。
アロファネート結合を有する化合物の市販品としては、デスモジュールXP2565(住化バイエルウレタン(株)社製)等が挙げられる。
ウレタン結合を有する化合物の市販品としては、イソホロンジイソシアネートのトリメチロールプロパンとのアダクト体であるタケネートD-140N(三井化学(株)製)、イソホロンジイソシアネートとヒドロキシエチルアクリレートとのモノアダクト体であるVESTANAT EP-DC1241(エボニックジャパン(株)製)等が挙げられる。
本発明の接着剤組成物において、有機溶剤は、(A)成分を溶解する目的で配合する。
本発明の接着剤組成物は、有機溶剤、及び前記(A)~(C)成分を含有するものであるが、目的に応じて種々の成分を配合することができる。
尚、後記するその他の成分は、例示した化合物の1種のみを使用しても良く、2種以上を併用しても良い。
硬化触媒は、(A)成分と、イソシアネート化合物との架橋反応を促進し、優れた接着性能を得る目的で配合することができる。
スチレン系熱可塑性エラストマーは、接着力を向上する目的で配合することができる。
粘着付与剤は、接着力を向上する目的で配合することができる。
本発明の接着剤組成物は、有機溶剤、及び前記(A)~(C)成分を必須成分として含有するものである。
本発明の接着剤組成物は、公知の方法で製造できる。
本発明の熱融着性部材は、本発明の接着剤組成物が硬化してなる接着剤層と、接着剤層の一面側に接合された金属層と、接着剤層の他面側に接合された熱融着性樹脂層とを備える。
本発明の熱融着性部材の概略図は、図1及び図2に示される。即ち、図1の熱融着性部材1は、熱融着性樹脂層11と、接着剤層12と、金属層13とを、順次備える。また、図2の熱融着性部材1は、熱融着性樹脂層11と、接着剤層12と、金属層13と、他の層14とを、順次備える。
図1に示される熱融着性部材の製造方法は、以下の通りである。
(1)接着剤組成物を、金属層13形成用の金属箔、金属製フィルム等の表面に塗布し、その後、組成物中の有機溶剤を除去して接着剤層12を形成し、次いで、接着剤層12が形成された面に、熱融着性樹脂層11形成用樹脂フィルム(以下、「熱融着性樹脂フィルム」という。)を接触させて、加熱しながら、圧着する方法。
(2)接着剤組成物を、熱融着性樹脂フィルムの表面に塗布し、その後、組成物中の有機溶剤を除去して接着剤層12を形成し、次いで、接着剤層12が形成された面に、金属層13形成用の金属箔等を接触させて、加熱しながら圧着する方法。
(3)接着剤組成物を、他の層14を構成する樹脂層と、この樹脂層の一面側に、蒸着等により形成された金属層13とを有する複合フィルムにおける金属層13の表面に塗布し、その後、組成物中の有機溶剤を除去して接着剤層12を形成し、次いで、接着剤層12が形成された面と、熱融着性樹脂フィルムを接触させて、加熱しながら圧着する方法。
(4)接着剤組成物を、熱融着性樹脂フィルムの表面に塗布し、その後、組成物中の有機溶剤を除去して接着剤層12を形成し、次いで、接着剤層12が形成された面に、他の層14を構成する樹脂層と、この樹脂層の一面側に、蒸着等により形成された金属層13とを有する複合フィルムにおける金属層13が形成された面を接触させて、加熱しながら圧着する方法。
(5)上記(1)又は(2)の方法により得られた積層体における金属層13の表面に、他の層14形成用フィルムを押出成形する方法。
本発明の熱融着性部材は、電気分野、自動車分野、産業分野及びその他分野の様々な工業用製品分野において使用することができる。
1)製造例1〔(A)成分の製造〕
二軸押出機(L/D=42、φ=58mm)に、プロピレン-エチレン-1-ブテン共重合体(プロピレン成分72モル%、エチレン成分7モル%、1-ブテン成分21モル%、重量平均分子量120,000、Tm=100℃)100重量部、無水マレイン酸2.3重量部、メタクリル酸ラウリル4重量部、2,5-ジメチル-2,5-ジ(t-ブチルパーオキシ)ヘキサン1.5重量部を投入した。滞留時間は10分、バレル温度は180℃(第1バレル~第7バレル)として反応し、第7バレルにて脱気を行い、残留する未反応の無水マレイン酸 及びメタクリル酸ラウリルを除去し、反応物(以下、「A1成分」という。)を得た。
攪拌機、冷却管、及び滴下漏斗を取り付けた四つ口フラスコ中で、プロピレン-エチレン共重合体(プロピレン成分97モル%、エチレン成分3モル%、重量平均分子量250,000、Tm=125℃)100重量部をトルエン400重量部中に加熱溶解させた後、系内の温度を110℃に保持して撹拌しながらジクミルパーオキサイド1重量部を滴下し、その後1時間減成処理した。次に、無水アコニット酸1.5重量部、アクリル酸オクチル3重量部、過酸化ベンゾイル0.5重量部をそれぞれ3時間かけて滴下し、さらに1時間反応させた。反応後、室温に冷却した後、粗反応物を大過剰のアセトン中に投入して未反応の無水アコニット酸及びアクリル酸オクチルを除去し、反応物(以下、「A2成分」という。)を得た。
製造例1と同様の二軸押出機に、プロピレン-エチレン-1-ブテン共重合体(プロピレン成分68モル%、エチレン成分8モル%、1-ブテン成分24モル%、重量平均分子量50,000、Tm=70℃)100重量部、無水イタコン酸8重量部、アクリル酸トリデシル5重量部、ラウロイルパーオキサイド2重量部を投入した。滞留時間は10分、バレル温度は170℃(第1バレル~第7バレル)として反応し、第7バレルにて脱気を行い、残留する未反応の無水イタコン酸及びアクリル酸トリデシルを除去し、反応物(以下、「A3成分」という。)を得た。
製造例1~同3で得られた反応物A1~A3について、後記する方法に従い、重量平均分子量、融点、酸性基含有モノマー及び/又は酸無水物基含有モノマーのグラフト量、並びに(メタ)アクリル酸長鎖アルキルエステルのグラフト量を測定した。
それらの結果を表1に示す。
装置 :HLC-8220GPC(東ソー(株)製)
カラム :TSKgel GMHXL2本(東ソー(株)製)
カラム温度 :40℃
溶離液 :テトラヒドロフラン 1.00ml/分
検出器 :RI
GPCにより測定した分子量をポリスチレンの分子量を基準にして換算した。
JIS K 7121(1987年制定)の規定に準じ、示差走査熱量計を用いて、昇温速度10℃/分で測定し、結晶化した温度を融点(以下「Tm」)とした。
酸無水物基含有モノマーのグラフト量は、後記する測定により得られた酸価から次式で定義される。
グラフト量(重量%)=酸価×M×100/(1000×56.1×V)
M=(酸無水物基含有モノマーの分子量)+(酸無水物基含有モノマー中の不飽和基 の数)×1.008
・無水マレイン酸の場合、M=99.1
・無水アコニット酸の場合、M=157.1
・無水イタコン酸の場合、M=113.1
V=酸無水物基含有モノマーを加水分解した時の酸性基の価数
・無水マレイン酸の場合、V=2
・無水アコニット酸の場合、V=3
・無水イタコン酸の場合、V=2
前記反応物A1~A3の酸無水物基含有モノマーのグラフト量は、次式に従って算出した。
A1のグラフト量(重量%)=酸価× 99.1×100/(1000×56.1×2)
A2のグラフト量(重量%)=酸価×157.1×100/(1000×56.1×3)
A3のグラフト量(重量%)=酸価×113.1×100/(1000×56.1×2)
◆酸価の測定方法
酸価は、試料1g中に含まれる酸を中和するのに要する水酸化カリウムのミリグラム数を示し、JIS K 0070:1992に準じて測定した。
具体的には、共栓付三角フラスコに測定する試料0.2gを精秤し、テトラヒドロフラン20mlを加え、加温しながら溶解させて試料溶液を得る。次いで、この試料溶液に、指示薬として1w/v%のフェノールフタレインエタノール溶液を数滴加え、滴定液として0.1mol/Lの水酸化カリウムのエタノール溶液を用いて、10秒間持続する淡紅色を呈するまで滴定を行い、次式に従って酸価を算出した。
酸価(mgKOH/g)=(T×F×56.1×0.1)/W
ここで、上記計算式において、Tは滴定量(mL)、Fは滴定液のファクター、Wは試料採取量(g)をそれぞれ表す。
まず、製造例1と同様の二軸押出機を用いて、前記反応物A1~A3の原料であるポリオレフィンに対して、前記反応物A1~A3の原料である(メタ)アクリル酸長鎖アルキルエステル(濃度(重量%):C1、C2及びC3)を混合した後、熱プレスを用いて、(メタ)アクリル酸長鎖アルキルエステル濃度が異なるフィルム3種類(厚み:100μm)を得た。
フーリエ変換赤外分光法により、前記3種類のフィルムの赤外吸収スペクトルを測定して、次式に従って吸光度比Y1、Y2及びY3を求め、濃度C1、C2及びC3に対する検量線を作成した。
吸光度比Y=(エステルカルボニル伸縮振動(1730±10cm-1)に由来する吸光度)/(CH3のC-H変角振動(1380±10cm-1)に由来する吸光度)
Y1:濃度C1の時のY
Y2:濃度C2の時のY
Y3:濃度C3の時のY
ついで、前記反応物A1~A3の赤外スペクトルを測定して、吸光度比YA1(反応物A1のY)、YA2(反応物A2のY)及びYA3(反応物A3のY)を求め、反応物A1~A3の(メタ)アクリル酸長鎖アルキルエステルのグラフト量は、前記検量線を基に次式に従って算出した。
A1のグラフト量(重量%)=(YA1-b)/a
A2のグラフト量(重量%)=(YA2-b)/a
A3のグラフト量(重量%)=(YA3-b)/a
a=(3f-d×e)/(3c-d2)
b=(c×e-f×d)/(3c-d2)
c=C1 2+C2 2+C3 2
d=C1+C2+C3
e=Y1+Y2+Y3
f=C1Y1+C2Y2+C3Y3
1)接着剤組成物の調製
コンデンサー及び攪拌機が付設された内容積300mlのフラスコに、下記表2に示す(A)成分及び有機溶剤を仕込み、60℃で10分間撹拌し、溶液を得た。室温まで冷却した後、この溶液に、反応促進剤を添加して更に混合し、液状の樹脂組成物を得た。
次いで、当該樹脂組成物に対し、表2に示すイソシアネート化合物(B)成分及び/又は(C)成分を表2に示す割合で配合して混合し、接着剤組成物を得た。
なお、後記の試験片の作製に際して、イソシアネート化合物を配合後、1時間以内に、接着剤組成物を使用した。
又、表2における略号は下記を意味する。
・DBTL:ジブチルスズジラウレート、(株)ADEKA製、アデカスタブBT-11
・TPA100:ヘキサメチレンジイソシアネート(炭素数6の炭化水素基を有する)のイソシアヌレート体、旭化成(株)製デュラネートTPA-100
・N3200:ヘキサメチレンジイソシアネート(炭素数6の炭化水素基を有する)のビュレット体、住化バイエルウレタン(株)製デスモジュールN3200
・HT:ヘキサメチレンジイソシアネート(炭素数6の炭化水素基を有する)とトリメチロールプロパンとのアダクト体、住化バイエルウレタン(株)製スミジュールHT
・XP2580:ヘキサメチレンジイソシアネート(炭素数6の炭化水素基を有する)のアロファネート体、住化バイエルウレタン(株)製デスモジュールXP2580
・HDI:ヘキサメチレンジイソシアネート(炭素数6の炭化水素基を有する)
・TMDI:テトラメチレンジイソシアネート(炭素数4の炭化水素基を有する)
・Z4470:イソホロンジイソシアネート(炭素数10の炭化水素基を有する)のイソシアヌレート体、住化バイエルウレタン(株)製デスモジュール Z4470 BA
・XP2565:イソホロンジイソシアネート(炭素数10の炭化水素基を有する)のアロファネート体、住化バイエルウレタン(株)製デスモジュール XP2565
・D140N:イソホロンジイソシアネート(炭素数10の炭化水素基を有する)とトリメチロールプロパンとのアダクト体、三井化学(株)製タケネートD-140N
・EPDC1241:イソホロンジイソシアネート(炭素数10の炭化水素基を有する)とヒドロキシエチルアクリレートとのモノアダクト体、エボニックジャパン(株)製VESTANAT EP-DC1241
・IPDI:イソホロンジイソシアネート(炭素数10の炭化水素基を有する)
・DDDI:ドデカンジイソシアネート(炭素数12の炭化水素基を有する)
(1)粘度
B型回転粘度計(東機産業(株)製)を用いて、温度25℃±0.5℃の条件で測定した。
アルミニウム箔(サイズ:100mm×200mm、厚さ:40μm、表面処理:化成処理)に、接着剤組成物をバーコーターで塗布し、その後、80℃で60秒間、更に180℃で20秒間乾燥させ、接着剤組成物に含有されていた有機溶剤を除去して膜厚4μmの接着剤層を形成した。
次いで、接着剤層の表面に、熱融着性樹脂フィルムとして無延伸ポリプロピレンフィルム(厚さ80μm、以下「CPP」という。)を貼合し、熱傾斜試験機を用いて、アルミニウム箔の面から加圧して圧着させた。このときの接着条件は、温度180℃、圧力0.3MPa、圧着時間2秒とした。
その後、この一体化物を40℃に調温された熱風循環式オーブンに3日間収容し、試験片を得た。
前記3.3)で得られた試験片を用い、後記する評価を行った。
[常温剥離強度]
前記試験片を15mm幅に裁断し、アルミニウム箔とCPPとの間の常温剥離強度(測定温度25℃)を、T剥離試験(引張速度100mm/分)で測定し、以下の3水準で評価を行った。それらの結果を表2に示す。
◎:20N/15mm以上
〇:10N/15mm以上、20N/15mm未満
×:10N/15mm未満
[熱間剥離強度]
前記試験片を15mm幅に裁断し、アルミニウム箔とCPPとの間の熱間剥離強度(測定温度80℃)を、T剥離試験(引張速度100mm/分)で測定し、以下の3水準で評価を行った。それらの結果を表2に示す。
◎:15N/15mm以上
〇:10N/15mm以上、15N/15mm未満
×:10N/15mm未満
電解液として、炭酸エチレン、炭酸ジエチル、炭酸ジメチルを1:1:1(重量比)で混合し、これに1mol/Lの濃度でヘキサフルオロリン酸リチウムを添加したものを用いた。
前記試験片を80℃の電解液中に8日間浸漬した後、アルミニウム箔とCPPとの間の常温剥離強度(測定温度25℃)をT剥離試験(引張速度100mm/分)で測定し、以下の3水準で評価を行った。それらの結果を表2に示す。
◎:15N/15mm以上
〇:10N/15mm以上、15N/15mm未満
×:10N/15mm未満
実施例1~14の結果から明らかなように、本発明の接着剤組成物は、常温剥離強度が20N/15mm以上と高く、熱間剥離強度も10N/15mm以上と高く接着性に優れる上、耐電解液性にも優れるものであった。
これに対して、比較例1~8の接着剤組成物は、(A)成分を含むものの、イソシアネート化合物として(B)成分又は(C)成分のいずれか一方しか含まないため、常温剥離強度又は熱間剥離強度のいずれかが低く接着性に劣った。
Claims (10)
- 有機溶剤、当該有機溶剤に溶解する酸性基及び/又は酸無水物基を有するポリオレフィン(A)、並びにイソシアネート化合物を含有する接着剤組成物であって、前記イソシアネート化合物が炭素数4~7の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(B)、並びに炭素数8~14の炭化水素基を有するジイソシアネート化合物及び/又はその誘導体(C)を含む接着剤組成物。
- 前記炭素数4~7の炭化水素基を有するジイソシアネート化合物がヘキサメチレンジイソシアネートである請求項1に記載の接着剤組成物。
- 前記炭素数8~14の炭化水素基を有するジイソシアネート化合物が、2級のイソシアネート基を少なくとも1個以上有するジイソシアネート化合物である請求項1又は請求項2に記載の接着剤組成物。
- 前記炭素数8~14の炭化水素基を有するジイソシアネート化合物がイソホロンジイソシアネートである請求項1~請求項3のいずれか1項に記載の接着剤組成物。
- 前記炭素数4~7の炭化水素基を有するジイソシアネート化合物の誘導体及び/又は前記炭素数8~14の炭化水素基を有するジイソシアネート化合物の誘導体が、イソシアヌレート結合、ビュレット結合、ウレタン結合及びアロファネート結合からなる群より選択される少なくとも1つの結合を含む請求項1~請求項4のいずれか1項に記載の接着剤組成物。
- 前記(A)成分が、酸性基含有モノマー及び/又は酸無水物基含有モノマーでグラフト変性されたポリオレフィンであって、そのグラフト量が0.10~30重量%である請求項1~請求項5のいずれか1項に記載の接着剤組成物。
- 前記(A)成分が、炭素数8~18のアルキルアルコールと(メタ)アクリル酸とのエステル化物でグラフト変性されたポリオレフィンであって、そのグラフト量が0.10~20重量%である請求項1~請求項6のいずれか1項に記載の接着剤組成物。
- 前記(A)成分の重量平均分子量は、15,000~200,000である請求項1~請求項7のいずれか1項に記載の接着剤組成物。
- 請求項1~請求項8のいずれか1項に記載の接着剤組成物が硬化してなる接着剤層と、当該接着剤層の一面側に接合された金属層と、当該接着剤層の他面側に接合された熱融着性樹脂層とを備えることを特徴とする熱融着性部材。
- 請求項9に記載の熱融着性部材を含むリチウムイオン電池用包装材料。
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JP7428178B2 (ja) | 2019-03-29 | 2024-02-06 | 株式会社レゾナック | 接着剤用組成物、蓄電装置用外装材及びその製造方法 |
US12018189B2 (en) | 2019-03-29 | 2024-06-25 | Resonac Corporation | Composition for adhesives, outer package material for electricity storage devices, and method for producing same |
WO2021131812A1 (ja) * | 2019-12-23 | 2021-07-01 | 東亞合成株式会社 | 接着剤組成物、熱融着性部材、及び、二次電池包材 |
CN114867806A (zh) * | 2019-12-23 | 2022-08-05 | 东亚合成株式会社 | 粘合剂组合物、热熔接性构件及二次电池用包装材料 |
WO2021256416A1 (ja) * | 2020-06-16 | 2021-12-23 | 東亞合成株式会社 | 接着剤組成物 |
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TWI754073B (zh) | 2022-02-01 |
US20200131413A1 (en) | 2020-04-30 |
JP2021191854A (ja) | 2021-12-16 |
CN110799612A (zh) | 2020-02-14 |
EP3647386A4 (en) | 2021-03-17 |
JPWO2019003977A1 (ja) | 2020-04-23 |
TW201905144A (zh) | 2019-02-01 |
JP6930588B2 (ja) | 2021-09-01 |
EP3647386A1 (en) | 2020-05-06 |
KR102498477B1 (ko) | 2023-02-10 |
KR20200021930A (ko) | 2020-03-02 |
CN110799612B (zh) | 2021-07-20 |
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