Classifications

• • 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
  • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
  • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
  • C09J123/04—Homopolymers or copolymers of ethene
• • 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
• • 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
  • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
  • C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
• • 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
• • 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
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin 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
• • 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
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • 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
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/04—Homopolymers or copolymers of ethene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
  • C08L23/14—Copolymers of propene
• • 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
  • C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
  • C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/10—Adhesives in the form of films or foils without carriers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
  • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• • 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
• • 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
  • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only 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
  • H01M50/183—Sealing members
• • 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
• • 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
  • H01M50/197—Sealing members 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
  • H01M50/183—Sealing members
  • H01M50/19—Sealing members characterised by the material
  • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2203/00—Applications
  • C08L2203/20—Applications use in electrical or conductive gadgets
  • C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
• • 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
• • 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 resin composition and a film using the same.
• the lithium-ion battery packaging material is a bag-like composite of aluminum foil and resin film, which is lightweight and flexible in terms of battery shape and miniaturization.
• Laminated packaging materials that have
• the edges of the metal foils are heat-sealed with an adhesive polyolefin film to bond the metal foils together and ensure insulation.
• Patent Document 1 a substrate layer, a metal foil layer having a chemical conversion treatment layer on at least one side, an acid-modified polyolefin layer, a heat seal layer consisting of a high-melting point polypropylene layer and an ethylene-propylene random copolymer layer, It describes a battery packaging material which is at least sequentially laminated, wherein the high-melting point polypropylene layer is arranged closer to the metal foil layer than the ethylene-propylene random copolymer layer, and the melting point is 150° C. or higher. .
• Lithium-ion battery packaging films have the problem that the adhesive force between the adhesive polyolefin film and the metal foil is reduced when immersed in the electrolyte.
• the battery packaging film described in Patent Document 1 was insufficient in electrolytic solution resistance.
• the present invention is an adhesive resin composition capable of forming a battery packaging film and a lithium ion battery electrode sealing material having excellent electrolyte resistance, and a battery packaging film and a lithium ion battery electrode sealing material.
• An object of the present invention is to provide a single-layer or multilayer film exhibiting excellent electrolyte resistance.
• the present invention relates to, for example, the following [1] to [8].
• the content of the structure derived from the unsaturated carboxylic acid and/or derivative thereof in the adhesive resin composition is 0.05 to 1% by mass in terms of the content of the structure derived from maleic anhydride [1] ] to the adhesive resin composition according to any one of [3].
• a monolayer or multilayer film comprising at least one layer containing the adhesive resin composition according to any one of [1] to [4].
• At least one polymer (a-1) selected from the group consisting of ethylene homopolymers and copolymers of ethylene and at least one ⁇ -olefin selected from ⁇ -olefins having 3 to 20 carbon atoms is a modified ethylene polymer (a-2) modified with an unsaturated carboxylic acid and/or a derivative thereof, and has a melt flow rate of 0.1 measured at 190° C. under a load of 2.16 kg according to ASTM D1238.
• an adhesive resin composition comprising:
• the adhesive resin composition of the present invention it is possible to form a battery packaging film and a lithium ion battery electrode sealing material that are excellent in electrolyte resistance.
• the single-layer or multilayer film according to the present invention exhibits excellent electrolyte resistance when used as a packaging film for batteries and an electrode sealing material for lithium-ion batteries.
• An adhesive resin composition according to one embodiment of the present invention contains an ethylene polymer (A) and a soft propylene copolymer (B).
• An adhesive resin composition according to another embodiment of the present invention contains an ethylene-based polymer (A') and a soft propylene-based copolymer (B).
• the ethylene polymer (A) is at least selected from the group consisting of ethylene homopolymers and copolymers of ethylene and at least one ⁇ -olefin selected from ⁇ -olefins having 3 to 20 carbon atoms.
• the ethylene polymer (A′) is the modified ethylene polymer (a-2), and has a melt flow rate of 0.1 to 10 g measured at 190° C. under a load of 2.16 kg according to ASTM D1238. /10 min polymer (resin).
• the polymer (a-1) is at least selected from the group consisting of ethylene homopolymers and copolymers of ethylene and at least one ⁇ -olefin selected from ⁇ -olefins having 3 to 20 carbon atoms. It is one type of polymer.
• the copolymer of ethylene and at least one ⁇ -olefin selected from ⁇ -olefins having 3 to 20 carbon atoms preferably contains 50 to 99 mol%, more preferably 60 to 99 mol% of structural units derived from ethylene. preferably 1 to 50 mol%, more preferably 1 to 40 mol% (where the total of both is 100 mol%) of a structural unit derived from an ⁇ -olefin having 3 to 20 carbon atoms.
• Examples of the ⁇ -olefins include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene and 1-hexadecene. , 1-octadecene and 1-eicosene, and among these, propylene, 1-butene, 1-hexene and 1-octene are preferred.
• the ⁇ -olefin may be of one type or two or more types.
• Examples of the polymer (a-1) include polyethylene, ethylene/propylene copolymers, and ethylene/propylene/ ⁇ -olefin copolymers having 4 to 20 carbon atoms.
• Examples of the method for producing the polymer (a-1) are not particularly limited, and include a known method using a known catalyst such as a high pressure method or a Ziegler-Natta catalyst or a metallocene catalyst. .
• the polymer (a-1) may be a commercial product.
• the ethylene polymer (A) includes a modified ethylene polymer (a-2) obtained by modifying the polymer (a-1) with an unsaturated carboxylic acid and/or a derivative thereof.
• the ethylene-based polymer (A') is the modified ethylene-based polymer (a-2) and has a melt flow rate of 0 when measured at 190°C under a load of 2.16 kg according to ASTM D1238. .1 to 10 g/10 min.
• Examples of unsaturated carboxylic acids and/or derivatives thereof include unsaturated compounds having one or more carboxy groups in one molecule, esters of compounds having carboxy groups and alkyl alcohols, R—CO—O—CO—R′ ( R and R' are each independently a hydrocarbon group.
• Examples of unsaturated groups possessed by unsaturated compounds include vinyl groups, vinylene groups, and unsaturated cyclic hydrocarbon groups.
• the unsaturated carboxylic acid and/or its derivative may be used singly or in combination of two or more. Among these, unsaturated dicarboxylic acids and their acid anhydrides are preferred, and maleic acid, nadic acid and their acid anhydrides are particularly preferred.
• the amount of structures derived from the unsaturated carboxylic acid and/or its derivative in the ethylene polymer (A) and the amount of the structure derived from the unsaturated carboxylic acid and/or its derivative in the ethylene polymer (A') is preferably 0.01 to 5% by mass in terms of the amount of structures derived from maleic anhydride (that is, assuming that the unsaturated carboxylic acid and/or its derivative is maleic anhydride). , More preferably 0.05 to 3.5% by mass, still more preferably 0.05 to 2.0% by mass, particularly preferably 0.05 to 1% by mass (of the ethylene polymer (A) amount is 100% by mass).
• the amount of the structure derived from the unsaturated carboxylic acid and/or its derivative is within the above range, it is possible to obtain a resin composition having well-balanced moldability and adhesiveness.
• the method for obtaining the polymer (a-2) by modifying the polymer (a-1) with an unsaturated carboxylic acid and/or a derivative thereof is not particularly limited, and conventional methods such as a solution method and a melt-kneading method can be used.
• a known graft polymerization method can be employed. For example, a method in which the polymer (a-1) is melted and an unsaturated carboxylic acid and/or derivative thereof is added thereto for graft reaction, or the polymer (a-1) is dissolved in a solvent to form a solution. , and a method of adding an unsaturated carboxylic acid and/or a derivative thereof thereto for graft reaction.
• MFR The melt flow rate (hereinafter also referred to as “MFR”) of the ethylene polymer (A) (according to ASTM D1238, 190° C., 2.16 kg load) is preferably 0.1 to 15 g/10 minutes, more It is preferably in the range of 0.5 to 12 g/10 minutes, more preferably 1 to 10 g/10 minutes, even more preferably 1 to 6 g/10 minutes.
• MFR of the ethylene polymer (A') is (according to ASTM D1238, 190°C, 2.16 kg load) 0.1 to 10 g/10 min, more preferably 0.5 to 8 g/10 min, more preferably It is in the range of 1-10 g/10 min, even more preferably 1-6 g/10 min.
• the composition of the present invention has a good balance between flexibility and mechanical strength, and has high adhesive strength.
• Both the density of the ethylene polymer (A) and the density of the ethylene polymer (A′) are preferably 0.87 to 0.97 g/cm 3 , more preferably 0. 0.90 to 0.93 g/cm 3 , more preferably 0.91 to 0.92 g/cm 3 .
• the content of the modified ethylene polymer (a-2) in the ethylene polymer (A) is preferably 10 to 100% by mass, more preferably 15 to 100% by mass, still more preferably 15 to 25% by mass. is.
• the ethylene-based polymer (A) may contain an ethylene-based polymer other than the modified ethylene-based polymer (a-2).
• Examples of the ethylene polymer other than the modified ethylene polymer (a-2) include the unmodified polymer (a-1).
• the soft propylene-based copolymer (B) has a structural unit derived from propylene and a structural unit derived from at least one ⁇ -olefin selected from ⁇ -olefins having 2 or 4 to 20 carbon atoms. and the content of structural units derived from at least one ⁇ -olefin selected from ⁇ -olefins having 2 or 4 to 20 carbon atoms is 40 mol % or less.
• ⁇ -olefins having 2 or 4 to 20 carbon atoms include ethylene, 3-methyl-1-butene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1 -decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like, preferably ethylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene , ethylene, 1-butene, and 1-octene are more preferred.
• the content of structural units derived from propylene is 60 mol% or more, preferably 60 to 95 mol%, more preferably 60 to 93 mol%, and at least one selected from ⁇ -olefins having 2 or 4 to 20 carbon atoms.
• the content of the structural unit derived from the ⁇ -olefin of is 40 mol % or less, preferably 5 to 40 mol %, more preferably 7 to 40 mol % (where the total of both is 100 mol %).
• the MFR of the soft propylene-based copolymer (B) measured according to ASTM D1238 at 230°C under a load of 2.16 kg is preferably 1 from the viewpoint of dispersibility in the ethylene-based polymer (A). ⁇ 100 g/10 min, more preferably 2-50 g/10 min.
• the density of the soft propylene-based copolymer (B) measured according to JIS K7112 is preferably 850 to 900 g/cm 3 , more preferably 860 to 890 g/cm 3 from the viewpoint of flexibility. .
• the soft propylene-based copolymer (B) can be produced by a conventionally known method, for example, the method described in International Publication WO2004/087775.
• the soft propylene-based copolymer (B) may be a commercial product.
• All or part of the copolymer (B) may or may not be modified with an unsaturated carboxylic acid and/or a derivative thereof.
• the amount of structures derived from unsaturated carboxylic acid and/or derivatives thereof in the copolymer (B) is converted to the amount of structures derived from maleic anhydride. and (i.e., assuming that the unsaturated carboxylic acid and/or its derivative is maleic anhydride), preferably 0.01 to 5% by weight, more preferably 0.05 to 3.5% by weight. and more preferably 0.05 to 1% by mass (assuming the amount of copolymer (B) is 100% by mass).
• the amount of the structure derived from the unsaturated carboxylic acid and/or its derivative is within the above range, it is possible to obtain a resin composition having well-balanced moldability and adhesiveness.
• the method for modifying the unmodified copolymer (B) with an unsaturated carboxylic acid and/or a derivative thereof is not particularly limited, and the polymer (a-1) is modified to obtain the polymer (a-2 ) can be used.
• the adhesive resin composition of the present invention may contain additives as long as the effects of the present invention are not impaired.
• additives include antioxidants, ultraviolet absorbers, neutralizers, nucleating agents, light stabilizers, antistatic agents, anti-blocking agents, lubricants, odor adsorbents, antibacterial agents, moisture absorbers, pigments, and inorganic substances.
• organic fillers and polymers other than the ethylene-based polymer (A) and the soft propylene-based copolymer (B) may be used.
• the content of the ethylene polymer (A) and the soft propylene copolymer (B) in the adhesive resin composition of the present invention is 60 to 95 parts by weight and 5 to 40 parts by weight, preferably 65 to 90 parts by weight and 10 to 35 parts by weight, more preferably 70 to 85 parts by weight, and 15 to 30 parts by mass.
• the resin composition of the present invention exhibits high adhesiveness, especially after immersion in an electrolytic solution, and a film comprising a layer obtained from the composition of the present invention is , the deterioration of adhesion due to immersion in the electrolytic solution is unlikely to occur.
• the MFR (according to ASTM D1238, 190°C, 2.16 kg load) of the adhesive resin composition of the present invention is 1 to 20 g/10 minutes, preferably 1 to 15 g/10 minutes, more preferably 1 to 10 g/10 minutes. minutes.
• the MFR exceeds 20 g/10 minutes, the composition becomes thinner during heat sealing, and the adhesive layer formed from the composition becomes thinner, resulting in a decrease in adhesive strength. If it is lower than this, the wettability to the adherend decreases, resulting in a decrease in adhesive strength.
• the density (according to JIS K7112) of the adhesive resin composition of the present invention is preferably 0.85 to 0.95 g/cm 3 , more preferably 0.89 to 0.92 g/cm 3 , still more preferably 0.89 to 0.92 g/cm 3 . 89 to 0.91 g/cm 3 .
• the amount of the structure derived from the unsaturated carboxylic acid and/or derivative thereof (the amount of graft modification) in the adhesive resin composition of the present invention is converted into the amount of the structure derived from maleic anhydride (i.e., unsaturated carboxylic acid Assuming that the acid and/or its derivative is maleic anhydride), it is preferably 0.05-1% by weight, more preferably 0.10-1% by weight.
• the adhesive resin composition of the present invention except that the ethylene-based polymer (A) or ethylene-based polymer (A') and the soft propylene-based copolymer (B) are used as raw materials, is a conventionally known It can be manufactured by a method. For example, it can be produced by melt-kneading the above components.
• the adhesive resin composition of the present invention comprises the ethylene polymer (A) or the ethylene polymer (A') in a continuous phase, and the soft propylene copolymer (B) dispersed in the continuous phase. in the dispersed phase, forming a finely dispersed structure (so-called sea-island structure).
• a finely dispersed structure so-called sea-island structure.
• the polymer (a-1) also constitutes a continuous phase like the ethylene polymer (A) and the ethylene polymer (A').
• the average particle diameter of the dispersed phase measured by the method described below is preferably 0.001 to 10 ⁇ m.
• the upper limit of the average particle size of the dispersed phase is more preferably 8 ⁇ m, still more preferably 6 ⁇ m, particularly preferably 5 ⁇ m, and the lower limit is preferably 0.09 ⁇ m.
• the diameter is the particle size
• the shape of the dispersed phase is elliptical
• the length of the major axis is the particle size.
• the area of the dispersed phase is obtained, the diameter of a perfect circle having the same area as that area is obtained, and this is taken as the particle size.
• the average particle diameter of the dispersed phase is 0.001 ⁇ m or more, a sufficient cavitation effect can be obtained, and the electrolyte resistance is good.
• the dispersed phase has an average particle size of 10 ⁇ m or less, when the dispersed phase is present at the adhesion interface, it does not impede the adhesiveness of the continuous phase, and the composition of the present invention exhibits good adhesiveness.
• the proportion of dispersed phases having a diameter of 0.001 to 5 ⁇ m is preferably 80% or more, more preferably 85% or more, still more preferably 90% or more, and particularly preferably 95% or more. , most preferably 100%.
• the ratio is 80% or more, the composition has excellent adhesiveness.
• the single-layer or multilayer film of the present invention is characterized by including at least one layer containing the above-described adhesive resin composition of the present invention.
• Examples of specific embodiments of the monolayer or multilayer film of the present invention include: At least one layer containing the adhesive resin composition of the present invention, and at least one layer other than the layer containing the adhesive resin composition, wherein the layer containing the adhesive resin composition is The multilayer film in contact with the other layer, and at least one layer containing the adhesive resin composition of the present invention, and at least one layer selected from a metal-containing layer, a polyolefin layer and a polar resin layer, A multilayer film in which a layer containing an adhesive resin composition is in contact with at least one layer selected from the metal-containing layer, the polyolefin layer and the polar resin layer.
• the other layers include metal-containing layers, polyolefin layers and polar resin layers.
• the metal-containing layer examples include an aluminum layer (for example, aluminum foil), a copper layer, and a stainless steel layer.
• polystyrene layer examples include a polypropylene layer, a poly-4-methylpentene layer, and a polyethylene layer.
• polar resin layers examples include polyamide layers, EVOH layers, PET layers, and PBT layers.
• a layer containing the adhesive resin composition of the present invention can be produced by molding the adhesive resin composition of the present invention, for example, by melt extrusion molding. Accordingly, the monolayer or multilayer film of the present invention can be produced by casting, inflation, extrusion lamination, and the like.
• the single-layer or multilayer film of the present invention can be preferably used as a battery packaging film such as a lithium battery packaging film or as an electrode sealing material for lithium ion batteries.
• MFR Melt flow rate
• the MFR of the soft propylene-based copolymer was measured according to ASTM D1238 under the conditions of a temperature of 230°C and a load of 2.16 kg.
• the "MFR of the ethylene-based polymer (A)" refers to a value calculated by the logarithmic addition rule.
• Density was measured according to JIS K7112 (density gradient tube method).
• the density value of the ethylene-based polymer (A) is a weighted average value of the density values of the respective ethylene-based polymers.
• an ethylene-based polymer having a density value of x contains A mass% based on the content of the entire ethylene-based polymer (A), and an ethylene-based polymer having a density value of y is an ethylene-based polymer
• the density value of the ethylene polymer (A) when it contains (100-A)% by mass based on the content of the entire coalescence (A) is (x ⁇ A + y ⁇ (100-A)) / 100 is.
• the same calculation is performed when three or more types of ethylene-based polymers are included.
• the ethylene-based polymer (A') is similarly calculated.
• ⁇ Amount of graft modification The amount of structure derived from maleic anhydride (amount of graft modification) was determined by measuring the intensity of the peak at 1790 cm ⁇ 1 derived from the structure with an infrared absorption spectrometer, and quantifying it using a calibration curve prepared in advance.
• the obtained film was overlapped with an aluminum foil having a thickness of 200 ⁇ m and a width of 15 mm, and heat-sealed using a heat sealer under the conditions of a sealing temperature of 130 ° C., a sealing pressure of 0.2 MPa, and a sealing time of 4 seconds, to obtain a composite ( A multilayer film) was produced. Two composites were produced.

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• 2022
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