WO2016104502A1 - 電池パック保護部材用熱可塑性エラストマー組成物 - Google Patents
電池パック保護部材用熱可塑性エラストマー組成物 Download PDFInfo
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- WO2016104502A1 WO2016104502A1 PCT/JP2015/085832 JP2015085832W WO2016104502A1 WO 2016104502 A1 WO2016104502 A1 WO 2016104502A1 JP 2015085832 W JP2015085832 W JP 2015085832W WO 2016104502 A1 WO2016104502 A1 WO 2016104502A1
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- component
- styrene
- thermoplastic elastomer
- elastomer composition
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- 229920000092 linear low density polyethylene Polymers 0.000 description 1
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- 229910003002 lithium salt Inorganic materials 0.000 description 1
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- RBQRWNWVPQDTJJ-UHFFFAOYSA-N methacryloyloxyethyl isocyanate Chemical compound CC(=C)C(=O)OCCN=C=O RBQRWNWVPQDTJJ-UHFFFAOYSA-N 0.000 description 1
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- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
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- 229920002577 polybenzoxazole Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 229920002743 polystyrene-poly(ethylene-ethylene/propylene) block-polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- MEZLKOACVSPNER-GFCCVEGCSA-N selegiline Chemical compound C#CCN(C)[C@H](C)CC1=CC=CC=C1 MEZLKOACVSPNER-GFCCVEGCSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
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- 229920001897 terpolymer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
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- 150000003568 thioethers Chemical class 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- 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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
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- 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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
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- 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
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/143—Fireproof; Explosion-proof
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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
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- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
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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
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- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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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
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- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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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
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- C08K2201/001—Conductive additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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 a thermoplastic elastomer composition. More specifically, it exhibits excellent flexibility in a wide temperature range from room temperature to low temperature, and is excellent in flame retardancy, thermal conductivity, electrical insulation, and electrolyte resistance, and is suitably used as a battery pack protective member. It relates to a thermoplastic elastomer composition that can be used.
- thermoplastic elastomers are progressing due to environmental issues such as inability to recycle materials.
- Thermoplastic elastomer compositions using hydrogenated styrene thermoplastic elastomers such as styrene-butadiene block copolymer (SBS) and styrene-isoprene block copolymer (SIS) are conventionally known (for example, However, Patent Documents 1 to 4) do not satisfy the strict requirements of battery pack protection members.
- a battery pack is a battery in which a plurality of single cells are connected, and is also called an assembled battery.
- Secondary batteries such as nickel cadmium batteries, nickel metal hydride batteries, and lithium ion secondary batteries, are often attached to devices as such battery packs.
- battery packs have been used for devices with higher rated voltage and rated load current.
- the usage environment, conditions, and methods of battery packs are becoming stricter, such as rapid charging of charging specifications and space saving of specifications for storing and fixing battery packs in devices. For this reason, the battery pack protective member is also required to satisfy various required characteristics at a higher level.
- a hard battery pack a combination of several single cells is stored in a plastic case storage case.
- a soft battery pack a combination of several single cells is covered with a shrink tube.
- the soft type has the advantage of saving space than the hard type. Therefore, a material that can be used as a protective member for a soft battery pack, in particular, a material that is excellent in shape followability to the battery pack body is required.
- Lithium ion secondary batteries have become widespread as mainstream storage batteries.
- Lithium ion secondary batteries are characterized by being capable of rapid charging and large current discharge compared to other storage batteries, but heat generation during charging and discharging is a problem in safety measures. Therefore, not only a lithium ion secondary battery body but also a battery pack protective member is required to have heat resistance, suppress heat generation and animal heat, and further promote heat dissipation.
- the battery pack protective member is required to be flexible and have rubber elasticity for the purpose of preventing damage to the storage battery body due to impact when dropped.
- lithium ion secondary battery packs have recently been actively installed in electric vehicles, hybrid vehicles, aircraft-related, various motor drive-related devices, etc., and their protective members are flexible even in low-temperature environments. And it is calculated
- lithium ion secondary batteries incorporate safety measures accessories such as temperature fuses, current fuses, and thermistors in the battery pack as countermeasures against ignition due to abnormal heating of the charger during charging and discharging and abnormal heating of the battery due to external short circuit.
- safety measures accessories such as temperature fuses, current fuses, and thermistors in the battery pack as countermeasures against ignition due to abnormal heating of the charger during charging and discharging and abnormal heating of the battery due to external short circuit.
- flame resistance is also required for the protection member of the battery pack.
- the lithium ion secondary battery In addition, depending on the environment, state, and method in which the lithium ion secondary battery is used, there is a possibility that gas will be generated due to decomposition of the electrolyte or the like. The generation of gas inside the battery may lead to battery rupture or electrolyte external leakage, leading to the risk of smoke generation and ignition. Therefore, the electrolyte solution resistance and flame retardancy are also required for the protection member of the battery pack.
- a heat conductive elastomer composition useful for a heat radiating member such as an electric or electronic component “from an aluminum hydroxide whose surface is coated with an organic coupling agent to an elastomer composition mainly composed of a styrene elastomer”.
- the thermal conductivity of the elastomer is improved by blending the thermal conductive filler made of magnesium oxide with the surface covered with inorganic and / or organic matter and magnesia clinker, which is an inactivated magnesium oxide.
- Patent Document 5 has been proposed (Patent Document 5).
- the battery pack protective member in particular, the battery pack protective member of the lithium ion secondary battery does not satisfy the strict requirements.
- An object of the present invention is to exhibit excellent flexibility in a wide temperature range from room temperature to low temperature, have flame retardancy of rank V-0 in a vertical combustion test of UL94 without using a halogen flame retardant, and
- An object of the present invention is to provide a thermoplastic elastomer composition that is excellent in thermal conductivity, electrical insulation, and electrolytic solution resistance and can be suitably used as a protective member for battery packs, particularly soft battery packs.
- thermoplastic elastomer composition As a result of earnest research, the present inventor has found that the above-mentioned problems can be achieved by a specific thermoplastic elastomer composition.
- the present invention (A) 20 to 80% by mass of a hydrogenated product of a copolymer of an aromatic vinyl compound and a conjugated diene compound; (B) It comprises 80 to 20% by mass of a non-aromatic rubber softener, Here, the sum total of the said component (a) and the said component (b) is 100 mass%, 100 mass parts of resin compositions; (C) modified resin 0.1 to 10 parts by mass; and (d) magnesium hydroxide 250 to 400 parts by mass; Is a thermoplastic elastomer composition for battery pack protection members.
- the second invention is the thermoplastic resin according to the first invention, wherein the component (c) contains a hydrogenated product of a copolymer of an aromatic vinyl compound and a conjugated diene compound modified with maleic anhydride. It is an elastomer composition.
- a third invention is a hydrogenated product of a block copolymer of styrene and a conjugated diene compound in which the component (a) is (a-1) the content of structural units derived from styrene is 5 to 40% by mass. 20 to 100% by mass, and (a-2) a hydrogenated product of 80 to 0% by mass of a random copolymer of styrene and a conjugated diene compound in which the content of structural units derived from styrene is 5 to 40% by mass; Wherein the total of the component (a-1) and the component (a-2) is 100% by mass, according to the first or second invention.
- the fourth invention further includes (e) a thermally conductive filler containing one or more selected from the group consisting of magnesium oxide, magnesium silicate, magnesium carbonate, and boron nitride, with respect to 100 parts by mass of the resin composition.
- a thermally conductive filler containing one or more selected from the group consisting of magnesium oxide, magnesium silicate, magnesium carbonate, and boron nitride, with respect to 100 parts by mass of the resin composition.
- the thermoplastic elastomer composition according to any one of the first to third inventions, comprising 25 to 200 parts by mass.
- a fifth invention is a battery including the thermoplastic elastomer composition according to any one of the first to fourth inventions.
- thermoplastic elastomer composition of the present invention exhibits excellent flexibility in a wide temperature range from room temperature to low temperature, and has a flame retardancy of rank V-0 in a UL94 vertical combustion test without using a halogen flame retardant. And has excellent heat conductivity, electrical insulation, and electrolyte resistance. Therefore, it can be suitably used as a protective member for a battery pack, particularly a soft battery pack.
- thermoplastic elastomer composition of the present invention comprises (a) 20-80% by mass of a hydrogenated copolymer of an aromatic vinyl compound and a conjugated diene compound, and (b) a non-aromatic rubber softening material 80-
- the total of the component (a) and the component (b) is 100% by mass, and includes 100 parts by mass of the resin composition.
- Component (a) Hydrogenated product of copolymer of aromatic vinyl compound and conjugated diene compound
- the component (a) is a hydrogenated product of copolymer of aromatic vinyl compound and conjugated diene compound.
- the said component (a) contains the said component (b), the said component (d), and the said component (e) of an arbitrary component favorably, and functions to hold
- aromatic vinyl compound examples include styrene, t-butylstyrene, ⁇ -methylstyrene, p-methylstyrene, divinylbenzene, 1,1-diphenylstyrene, N, N-diethyl-p-aminoethylstyrene, vinyl. Examples thereof include toluene and p-tert-butylstyrene.
- these 1 type (s) or 2 or more types can be used. Of these, styrene is preferred as the aromatic vinyl compound.
- the content of the structural unit derived from the aromatic vinyl compound of the component (a) is preferably 70% by mass or less, more preferably 50% by mass or less, and still more preferably 40%, from the viewpoint of shape followability and flexibility. It is below mass%. Moreover, from a viewpoint of electrolyte solution resistance, Preferably it is 5 mass% or more.
- conjugated diene compound examples include butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene and the like.
- conjugated diene compound these 1 type, or 2 or more types can be used.
- conjugated diene compound butadiene, isoprene, and a combination of butadiene and isoprene are preferable.
- Hydrogenation rate of the component (a) (a carbon-carbon single bond is obtained by hydrogenation with respect to the number of double bonds between aliphatic carbons in the copolymer of the aromatic vinyl compound and the conjugated diene compound before hydrogenation)
- the ratio of the number of bonds is preferably 90 mol% or more, more preferably 95 mol% or more, from the viewpoint of long-term thermal stability of the thermoplastic elastomer composition.
- the hydrogenation rate as a mixture become the said range, when a component (a) is 2 or more types of mixtures.
- the component (a) is preferably composed of (a-1) styrene and a conjugated diene compound in which the content of the structural unit derived from styrene is 5 to 40% by mass from the viewpoint of rubber elasticity and moldability.
- the sum of the component (a-1) and the component (a-2) is 100% by mass.
- the component (a-1) is a hydrogen of block copolymer comprising at least one polymer block A mainly composed of an aromatic vinyl compound and at least one polymer block B mainly composed of a conjugated diene compound. It is an additive.
- Examples of the component (a-1) include those having a structure such as AB, ABA, BABA, and ABAABA. it can.
- the polymer block A is a polymer block composed only of an aromatic vinyl compound or a copolymer block of an aromatic vinyl compound and a conjugated diene compound.
- the content of the structural unit derived from the aromatic vinyl compound in the polymer block A is usually 50% by mass or more, from the viewpoint of electrolytic solution resistance and mechanical properties. , Preferably it is 70 mass% or more, More preferably, it is 90 mass% or more.
- the distribution of the structural unit derived from the conjugated diene compound in the polymer block A is not particularly limited and is arbitrary. When there are two or more polymer blocks A, these may have the same structure or different structures.
- the polymer block B is a polymer block composed only of a conjugated diene compound or a copolymer block of an aromatic vinyl compound and a conjugated diene compound.
- the content of structural units derived from the conjugated diene compound in the polymer block B is usually 50% by mass or more, preferably from the viewpoint of flexibility and mechanical properties. It is 70 mass% or more, More preferably, it is 90 mass% or more.
- the distribution of the structural unit derived from the aromatic vinyl compound in the polymer block B is not particularly limited and is arbitrary.
- the bonding mode between the conjugated diene compound and the conjugated diene compound (hereinafter sometimes abbreviated as microstructure) is not particularly limited and is arbitrary. When there are two or more polymer blocks B, these may have the same structure or different structures.
- the content of the structural unit derived from the aromatic vinyl compound in the component (a-1) is from the viewpoint of shape followability, flexibility, electrolytic solution resistance, shape stability of the molded product, and moldability. , Preferably 5 to 40% by mass, more preferably 10 to 30% by mass.
- the polystyrene-reduced mass average molecular weight (Mw) obtained from the differential molecular weight distribution curve measured by gel permeation chromatography of the component (a-1) is preferably 5,000 to 1,500,000, more preferably 10 , 5,000 to 550,000.
- the ratio (Mw / Mn) of the mass average molecular weight (Mw) to the number average molecular weight (Mn) is preferably 1 to 10.
- the aromatic vinyl compound is styrene, but if it is a small amount, it may contain an aromatic vinyl compound other than styrene.
- component (a-1) examples include styrene-ethylene / butene / styrene copolymer (SEBS), styrene / ethylene / propylene / styrene copolymer (SEPS), and styrene / ethylene / ethylene / propylene / styrene copolymer.
- SEEPS styrene-ethylene-butene / styrene copolymer
- SBBS styrene-butadiene-butylene-styrene copolymer
- SEBC styrene-ethylene-butene-crystalline ethylene block copolymer
- the component (a-1) Commercially available examples of the component (a-1) include “Septon (trade name)” by Kuraray Co., Ltd., “Clayton G (trade name)” by Clayton Polymer Japan Co., Ltd., and “Tuftec Polymer (product) by Asahi Kasei Corporation. Name) ".
- As the component (a-1) one or a mixture of two or more of these can be used.
- the component (a-2) is a hydrogenated product of a random copolymer of an aromatic vinyl compound and a conjugated diene compound.
- the content of the structural unit derived from the aromatic vinyl compound in the component (a-2) is from the viewpoint of shape following property, flexibility, electrolytic solution resistance, shape stability of the molded product, and molding processability. , Preferably 5 to 40% by mass, more preferably 10 to 30% by mass.
- the above component (a-2) was observed as a single peak in the range of ⁇ 50 ° C. to 0 ° C. Those are preferred.
- the selection range of the amount of the component (b) is expanded, and the balance between flexibility, particularly flexibility at low temperature, and followability to the battery pack shape is improved. be able to.
- the polystyrene-reduced mass average molecular weight (Mw) obtained from the differential molecular weight distribution curve measured by gel permeation chromatography of the component (a-2) is preferably 5,000 to 1,000,000, more preferably 10 , 350,000 to 350,000.
- the ratio (Mw / Mn) of the mass average molecular weight (Mw) to the number average molecular weight (Mn) is preferably 1 to 10.
- the aromatic vinyl compound is styrene, but if it is a small amount, it may contain an aromatic vinyl compound other than styrene.
- the component (a-2) one or a mixture of two or more thereof can be used.
- Component (b) Softener for non-aromatic rubber
- the component (b) functions to impart flexibility and shape following to the thermoplastic elastomer composition of the present invention and reduce extrusion load during molding. do.
- the component (b) is a non-aromatic mineral oil (hydrocarbon compound derived from petroleum or the like) or a synthetic oil (synthetic hydrocarbon compound), and is usually liquid, gel or gum at room temperature.
- the non-aromatic system means that the mineral oil is not classified into the aromatic system in the following classification (the aromatic carbon number is less than 30%).
- synthetic oils it means that no aromatic monomer is used.
- Mineral oil used as a rubber softener is a mixture of any one or more of paraffin chains, naphthene rings, and aromatic rings, and those having a naphthenic ring carbon number of 30 to 45% are naphthenic, Those having an aromatic carbon number of 30% or more are referred to as aromatic, and those that do not belong to naphthenic or aromatic systems and whose paraffin chain carbon number occupies 50% or more of the total carbon number are paraffinic. It is called and distinguished.
- component (b) examples include paraffinic mineral oils such as linear saturated hydrocarbons, branched saturated hydrocarbons, and derivatives thereof; naphthenic mineral oils; hydrogenated polyisobutylene, polyisobutylene, and polybutene. Synthetic oils; and the like.
- commercially available examples of the component (b) include isoparaffinic hydrocarbon oil “NA Solvent (trade name)” from Nippon Oil & Fats Co., Ltd., n-paraffinic process oil “PW-90 (trade name)” from Idemitsu Kosan Co., Ltd.
- paraffinic mineral oil is preferable from the viewpoint of compatibility, and paraffinic mineral oil having a small number of aromatic carbon atoms is more preferable. From the viewpoint of handleability, those which are liquid at room temperature are preferred.
- these 1 type, or 2 or more types of mixtures can be used.
- thermoplastic elastomer composition of the present invention is particularly flexible from the viewpoint of well-balanced expression of flame retardancy, thermal conductivity, electrical insulation, electrolytic solution resistance, flexibility, low temperature flexibility, and extrusion processability. From the viewpoints of properties, extrusion molding processability, and resistance to electrolytic solution, it contains 100 parts by mass of a resin composition comprising 20 to 80% by mass of the component (a) and 80 to 20% by mass of the component (b). Preferably, 100 parts by mass of a resin composition comprising 40 to 60% by mass of the component (a) and 60 to 40% by mass of the component (b) is included. Here, the sum total of the said component (a) and the said component (b) is 100 mass%.
- Component (c) Modified resin
- the component (c) is a modified product obtained by modifying a hydrophobic resin using a compound having a double bond between aliphatic carbons and a hydrophilic functional group.
- the component (c) has a structural unit derived from a compound having a double bond between aliphatic carbons and a hydrophilic functional group, it strongly interacts with the component (d) and the component (e). be able to. Moreover, since it has the structural unit derived from hydrophobic resin, it can interact strongly with the said component (a). Therefore, the said component (a), the said component (d), and the said component (e) can fully be mixed by using the said component (c).
- hydrophilic functional group examples include a carboxyl group, a carbonyl group, a hydroxyl group, a sulfonyl group, an amino group, a silanol group, an isocyanate group, a thiol group, an ether group, an ester group, and an epoxy group.
- the compound having a double bond between aliphatic carbons and a hydrophilic functional group has one or more of these.
- the hydrophilic functional group since the component (d) is an alkaline substance, acidic hydrophilic functional groups such as a carboxyalkyl group and a sulfonyl group are preferable. Moreover, since the said component (d) is a salt containing a hydroxide ion, the hydrophilic functional group which has reactivity with the salt containing hydroxide ions, such as a silanol group, an isocyanate group, and an epoxy group, is preferable.
- Examples of the compound having a double bond between aliphatic carbons and a hydrophilic functional group include, for example, an unsaturated carboxylic acid, a derivative of an unsaturated carboxylic acid, an unsaturated silane coupling agent, a double bond between aliphatic carbons, Examples thereof include a compound having an epoxy group, an unsaturated amine, a compound having a double bond between aliphatic carbons and an isocyanate, and a compound having a double bond between aliphatic carbons and a hydroxyl group.
- Examples of the unsaturated carboxylic acid include maleic acid, itaconic acid, fumaric acid, acrylic acid, and methacrylic acid.
- Examples of the unsaturated carboxylic acid derivatives include maleic acid monoester, maleic acid diester, maleic anhydride, itaconic acid monoester, itaconic acid diester, itaconic anhydride, fumaric acid monoester, fumaric acid diester, fumaric anhydride, acrylic Examples thereof include alkyl acrylates such as methyl acrylate, and alkyl methacrylates such as methyl methacrylate.
- the unsaturated silane coupling agent examples include vinyl-based silane coupling agents such as vinyltrimethoxysilane and vinyltriethoxysilane; 3-acryloxypropyltrimethoxysilane, and 3-methacryloxypropyltrimethoxysilane, (Meth) acrylic silane coupling agents such as 3-methacryloxypropyltriethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, and 3-methacryloxypropylmethyldiethoxysilane; and styryl such as p-styryltrimethoxysilane Silane coupling agents; and the like.
- vinyl-based silane coupling agents such as vinyltrimethoxysilane and vinyltriethoxysilane
- 3-acryloxypropyltrimethoxysilane 3-methacryloxypropyltrimethoxysilane
- (Meth) acrylic silane coupling agents such as 3-methacryloxypropyltriethoxysilane, 3-
- Examples of the compound having a double bond between aliphatic carbons and an epoxy group include glycidyl methacrylate, glycidyl acrylate, 4-epoxy-1-butene, 6-epoxy-1-hexene, and 8-epoxy-1- Examples include octene, 10-epoxy-1-decene, and 4-hydroxybutyl (meth) acrylate glycidyl ether.
- Examples of the unsaturated amine include allylamine (3-amino-1-propene) and 6-amino-1-hexene.
- Examples of the compound having a double bond between aliphatic carbons and an isocyanate include 2-isocyanatoethyl methacrylate and 2-isocyanatoethyl acrylate.
- Examples of the compound having a double bond between aliphatic carbons and a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, ( Hydroxyalkyl (meth) acrylates such as 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate; 3-buten-1-ol, 5-hexene- Hydroxyl group-containing ⁇ -olefins such as 1-ol and 7-octen-1-ol;
- maleic anhydride and unsaturated amine are preferable as the compound having a double bond between aliphatic carbons and a hydrophilic functional group.
- (meth) acrylic means acryl or methacryl.
- hydrophobic resin modified with a compound having a double bond between aliphatic carbons and a hydrophilic functional group examples include, for example, a polyethylene resin, a polypropylene resin, a polyolefin elastomer, and an aromatic vinyl compound.
- examples thereof include a copolymer with a diene compound and a hydrogenated product of a copolymer of an aromatic vinyl compound and a conjugated diene compound.
- polyethylene resin examples include high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, ethylene and ⁇ -olefin (eg, propylene, 1-butene, 1-pentene, 1-hexene, And copolymers with 1-octene and the like (including random copolymers and block copolymers).
- high density polyethylene medium density polyethylene
- low density polyethylene low density polyethylene
- linear low density polyethylene ethylene
- ⁇ -olefin eg, propylene, 1-butene, 1-pentene, 1-hexene, And copolymers with 1-octene and the like (including random copolymers and block copolymers).
- polypropylene resin examples include propylene homopolymers and copolymers (random copolymers) of propylene and ⁇ -olefins (eg, ethylene, 1-butene, 1-pentene, 1-hexene, and 1-octene). Polymers, and block copolymers).
- olefin elastomer examples include copolymers (random copolymers and blocks) of ethylene and ⁇ -olefin (for example, propylene, 1-butene, 1-pentene, 1-hexene, and 1-octene). Copolymers), and ethylene, ⁇ -olefins (eg, propylene, 1-butene, 1-pentene, 1-hexene, and 1-octene), and non-conjugated dienes (eg, 1,4- And terpolymers of hexadiene, 5-ethylidene-2-norbornene, 5-vinylnorbornene, and dicyclopentadiene).
- ⁇ -olefin for example, propylene, 1-butene, 1-pentene, 1-hexene, and 1-octene
- Copolymers and ethylene, ⁇ -olefins (eg, propylene, 1-butene, 1-pentene,
- Examples of the copolymer of the aromatic vinyl compound and the conjugated diene compound include styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS). it can.
- SBS styrene-butadiene-styrene block copolymer
- SIS styrene-isoprene-styrene block copolymer
- Examples of the hydrogenated product of the copolymer of the aromatic vinyl compound and the conjugated diene compound include those exemplified in the description of the component (a).
- the said component (c) uses the 1 type (s) or 2 or more types of mixture of the said hydrophobic resin, the 1 type (s) or 2 or more types of mixture of the compound which has the said double bond of aliphatic carbons, and a hydrophilic functional group. Then, it can be obtained by modifying by any method (grafting polymerization of the compound having a double bond between aliphatic carbons and a hydrophilic functional group on the hydrophobic resin composition).
- component (c) examples include maleic anhydride-modified polyethylene, acrylic acid-modified polyethylene, maleic anhydride-modified polypropylene, and maleic anhydride-modified styrene-ethylene / butene-styrene copolymer.
- Commercial examples of the component (c) include, for example, “Admer (trade name)” from Mitsui Chemicals, “Yumex (trade name)” from Sanyo Chemical Co., Ltd., and “Tuftec M1913 (product) from Asahi Kasei Chemicals Corporation. Name) ".
- the component (c) is preferably a hydrogenated copolymer of an aromatic vinyl compound modified with maleic anhydride and a conjugated diene compound from the viewpoint of miscibility.
- these 1 type, or 2 or more types of mixtures can be used.
- the blending amount of the component (c) is 0.1 to 10 parts by mass, preferably 100 to 10 parts by mass with respect to a total of 100 parts by mass of the component (a) and the component (b) from the viewpoints of miscibility and molding processability. Is 1 to 8 parts by mass.
- Component (d) Magnesium hydroxide
- the component (d) plays an important role to impart flame retardancy. It also has the effect of improving the thermal conductivity of the composition. Magnesium hydroxide is suitable for imparting flame retardancy to a resin composition for battery pack protection members because it is more excellent in electrical insulation than ordinary flame retardants such as halogen flame retardants and phosphorus flame retardants. Magnesium hydroxide having various particle sizes and surface-treated products are commercially available, and any component of magnesium hydroxide may be used as the component (d).
- the compounding amount of the component (d) is such that the total amount of the component (a) and the component (b) is 100 parts by mass, flame retardancy and thermal conductivity, and the productivity of the thermoplastic elastomer composition and molded product. From the viewpoint of balance, the amount is 250 to 400 parts by mass, preferably 260 to 380 parts by mass.
- thermoplastic elastomer composition of the present invention preferably further comprises component (e) a thermally conductive filler.
- Thermally conductive fillers can be generally classified into those having conductivity and those having electrical insulation. There are various types of surface treatments that take into account the miscibility with the resin, and they are properly used according to the purpose. Further, the shape includes powder, fiber, scale, and the like. Among these, from the characteristics required for the battery pack protection member, the component (e) is preferably a thermally conductive filler having high electrical insulation. Moreover, the non-fibrous thing is preferable from the problem of thermal conductivity anisotropy. More preferably, it is powdery. Specifically, as the component (e), magnesium silicate, magnesium oxide, magnesium carbonate, boron nitride and the like are preferable. As said component (e), these 1 type (s) or 2 or more types can be used preferably.
- the blending amount thereof is preferably 100 parts by mass with respect to a total of 100 parts by mass of the component (a) and the component (b) from the viewpoint of balance between electrical insulation and thermal conductivity.
- the amount is 25 to 200 parts by mass, more preferably 100 to 180 parts by mass.
- thermoplastic elastomer composition of the present invention may further contain a component (f1) polyphenylene ether resin.
- Polyphenylene ether resin is an engineering plastic with excellent heat resistance, electrical characteristics, and chemical resistance, and is known to be completely compatible with polystyrene, but on the other hand, it has poor fluidity and is difficult to mold. Therefore, it is generally used as a styrene-modified polyphenylene ether resin blended with a polystyrene resin for the purpose of improving molding processability, fluidity, and impact resistance.
- thermoplastic elastomer composition of the present invention By adding 2 to 8 parts by mass of the component (f1) to the total 100 parts by mass of the component (a) and the component (b) in the thermoplastic elastomer composition of the present invention.
- the liquid property, particularly the resistance to dissolution in a high-temperature electrolyte can be improved.
- a polyphenylene ether resin or a styrene-modified polyphenylene ether resin may be used as the component (f1).
- thermoplastic elastomer composition of the present invention may further contain a component (f2) polypropylene resin.
- a component (f2) polypropylene resin By including 1 to 10 parts by mass of the component (f2) with respect to 100 parts by mass in total of the component (a) and the component (b), the resistance to electrolytic solution and moldability can be improved. .
- component (f2) examples include propylene homopolymers, and copolymers of propylene and ⁇ -olefins (for example, ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, etc.) Including random copolymers and block copolymers).
- ⁇ -olefins for example, ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, etc.
- random copolymers and block copolymers random copolymers and block copolymers.
- the melting point (Tm) of the above component (f2) measured by a differential scanning calorimeter (DSC) is preferably 120 to 167 ° C. from the viewpoint of electrolytic solution resistance and molding processability.
- the melting point (Tm) measured by a differential scanning calorimeter (DSC) is a diamond DSC type differential scanning calorimeter manufactured by PerkinElmer Japan Co., Ltd., held at 230 ° C. for 5 minutes and ⁇ 10 at 10 ° C./min.
- Highest in the second melting curve (melting curve measured in the last heating process) measured with a program that cools to 0 ° C., holds at ⁇ 10 ° C. for 5 minutes, and heats up to 230 ° C. at 10 ° C./min
- the melt mass flow rate of the component (f2) (measured in accordance with ASTM D-1238 at 230 ° C. and a load of 21.18 N) is 0.1 to 10 g / 10 min from the viewpoint of improving the appearance of the molded product. Those are preferred.
- thermoplastic elastomer composition of the present invention may further contain a component (f3) polyvinyl acetate resin.
- a component (f3) polyvinyl acetate resin By including 1 to 10 parts by mass of the component (f3) with respect to a total of 100 parts by mass of the component (a) and the component (b), the moldability can be improved.
- component (f3) examples include vinyl acetate homopolymers and monomers copolymerizable with vinyl acetate and vinyl acetate (for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, and 1-hexene).
- ⁇ -olefins such as octene; unsaturated carboxylic acids such as methacrylic acid, acrylic acid, maleic acid, fumaric acid, and itaconic acid; unsaturated carboxylic acid derivatives such as methacrylic acid ester, acrylic acid ester and maleic anhydride; and chloride And a copolymer with vinyl; etc.).
- the component (f3) is preferably an ethylene vinyl acetate copolymer having a content of structural units derived from vinyl acetate of 20 to 60% by mass.
- these 1 type, or 2 or more types of mixtures can be used.
- the heat-curable elastomer composition of the present invention can further contain inorganic fillers other than the component (d) and the component (e) as desired.
- the inorganic filler has an economic advantage due to the increase in the amount.
- the inorganic filler include calcium carbonate, talc, mica, clay, barium sulfate, natural silicic acid, synthetic silicic acid (white carbon), titanium oxide, and carbon black.
- the compounding quantity of the said inorganic filler can be arbitrarily set in the limit which is not contrary to the objective of this invention.
- thermosetting elastomer composition of the present invention may further include various anti-blocking agents, sealability improvers, rubber softeners, heat stabilizers, antioxidants, and ultraviolet rays as desired.
- various anti-blocking agents, sealability improvers, rubber softeners, heat stabilizers, antioxidants, and ultraviolet rays as desired.
- Absorbers, antistatic agents, lubricants, crystal nucleating agents, colorants and the like can be included. These blending amounts can be arbitrarily set as long as they do not contradict the object of the present invention.
- antioxidants examples include 2,6-di-tert-p-butyl-p-cresol, 2,6-di-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, 4,4 Examples thereof include phenolic antioxidants such as -dihydroxydiphenyl and tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, phosphite antioxidants, and thioether antioxidants. Of these, phenolic antioxidants and phosphite antioxidants are preferred.
- thermoplastic elastomer composition of the present invention can be produced by melt-kneading the above components (a) to (d) and other optional components in any order or simultaneously.
- the method of melt kneading is not particularly limited, and a known method can be used.
- a single screw extruder, a twin screw extruder, a roll, a mixer, or various kneaders can be used.
- a mixer or kneader for example, it is preferable to perform melt-kneading under conditions of a discharge temperature of 170 to 240 ° C.
- melt kneading at a screw rotation speed of 50 to 500 rpm and a kneading temperature of 170 to 240 ° C., for example.
- press sheets having thicknesses of 2 mm, 3 mm, and 6 mm were obtained.
- the manufacturability of the above steps was evaluated according to the following criteria. The following tests (3) to (8) were conducted. The results are shown in any one of Tables 1-7.
- X There was at least one of the following problems during the above process. -Melt kneading with a pressure kneader is not stable due to overload. ⁇ Cannot granulate. ⁇ Decomposition gas generation.
- Extrusion processability Using a 40mm single screw extruder equipped with a screw with a compression ratio (CR) of 2.7 and a tube mold with 7mm outer diameter and 1mm thickness, screw rotation 15rpm, mold outlet resin temperature The tube was subjected to extrusion molding under the conditions of 230 ° C. and a pulling rate (calculated as the ratio of the thickness dimension of the mold to the thickness of the obtained tube) 1.3. Extrusion processability and the appearance of the molded product were evaluated according to the following criteria. (6-1) Uneven thickness: ⁇ : There is no uneven thickness, and a product according to the dimensions is obtained. (Triangle
- X Discharge unevenness (surging) is noticeable and uneven thickness is severe.
- Electrolytic solution resistance The state of the press sheet after the 1 mm thick press sheet obtained above was immersed in a lithium hexafluorophosphate aqueous solution (lithium salt concentration: 1 mol / liter) at a temperature of 80 ° C. for 2 hours was visually observed. Moreover, about the sample containing polyphenylene ether resin, the same test was done also on the conditions immersed for 2 hours at 100 degreeC. The evaluation criteria are as follows. ⁇ : No change at all. ⁇ : The sheet shape is slightly changed or swollen. X: A part of sheet
- Durometer hardness According to JIS K6253-3: 2012, a 15-second value of type A was measured. The sample used was the 6 mm thick press sheet obtained above. (Evaluation criteria) 80 or less was considered acceptable.
- HSBR Hydrogenated product
- Dynalon 1320P “Dynalon 1320P (trade name)” of a random copolymer of styrene and a conjugated diene compound from JSR Corporation. Content of structural unit derived from styrene 10% by mass, durometer hardness (type A, 15 sec value) 41, Mw 300,000, Mw / Mn 1.1, dynamic fixed viscoelasticity measured according to JIS K7244-4: 1999 In the characteristic test, the peak of the tensile loss tangent is observed as a single peak around -25 ° C.
- Component (b) (B-1) Paraffin oil “PW-90 (trade name)” from Idemitsu Kosan Co., Ltd.
- (C-4) An amine-modified styrene-ethylene butene-styrene block copolymer “Tuftec MP10 (trade name)” manufactured by Asahi Kasei Chemicals Corporation.
- (C-5) Ethylene glycidyl methacrylate-modified polypropylene “Modiper A4300 (trade name)” manufactured by NOF Corporation.
- (E-1) Magnesium oxide “Rf-50 (trade name)” from Ube Material Corporation. Average particle size 50 ⁇ m. The particle surface is treated with vinylalkoxysilane.
- (E-2) Magnesium silicate (Mg 3 Si 4 O 10 (OH) 2 ) “Talc P-4 (trade name)” manufactured by Nippon Talc Co., Ltd. Average particle diameter 4.5 ⁇ m.
- (E-3) Magnesium oxide “Starmag SL-WR (trade name)” manufactured by Kamishima Chemical Co., Ltd. Average particle size 9.8 ⁇ m.
- (E-4) Magnesium oxide “Rf-70 (trade name)” from Ube Material Corporation. Average particle size 70 ⁇ m.
- the particle surface is treated with vinylalkoxysilane.
- E-5 Magnesium carbonate “MSPS (trade name)” by Kamishima Chemical Co., Ltd.
- E-6 Boron nitride “SGB (trade name)” from Denki Kagaku Kogyo Co., Ltd.
- thermoplastic elastomer composition of the present invention has a good balance of flame retardancy, high thermal conductivity, electrical insulation, electrolytic solution resistance, flexibility, flexibility at low temperatures, composition manufacturability, and extrusion processability. It is expressed and can be suitably used as a protective member for a battery pack.
- the comparative example is inferior to at least one of flame retardancy, high thermal conductivity, electrical insulation, electrolytic solution resistance, flexibility, flexibility at low temperature, manufacturability of the composition, and extrusion processability. This is insufficient for a battery pack protective member.
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Abstract
Description
(a)芳香族ビニル化合物と共役ジエン化合物との共重合体の水素添加物20~80質量%と、
(b)非芳香族系ゴム用軟化材80~20質量%とからなり、
ここで上記成分(a)と上記成分(b)との合計は100質量%である、樹脂組成物100質量部;
(c)変性樹脂 0.1~10質量部;及び
(d)水酸化マグネシウム 250~400質量部;
を含む、電池パック保護部材用熱可塑性エラストマー組成物である。
上記成分(a)は芳香族ビニル化合物と共役ジエン化合物との共重合体の水素添加物である。上記成分(a)は、上記成分(b)、上記成分(d)、及び任意成分の上記成分(e)を良好に包含し、機械的物性を保持する働きをする。
上記成分(b)は、本発明の熱可塑性エラストマー組成物に柔軟性、及び形状追随性を付与し、成形加工時の押出負荷を低減する働きをする。
上記成分(c)は、脂肪族炭素同士の二重結合と親水性官能基を有する化合物を用いて疎水性樹脂を変性した変性体である。
上記成分(d)は、難燃性を付与するために重要な役割を担う。また組成物の熱伝導性を向上させる効果も有する。水酸化マグネシウムは、通常の難燃剤、例えばハロゲン系難燃剤やリン系難燃剤よりも電気絶縁性に優れているため、電池パック保護部材向け樹脂組成物の難燃性付与に好適である。水酸化マグネシウムには種々の粒子径のものや表面処理されたものが市販されているが、上記成分(d)としては、いずれの性状の水酸化マグネシウムを用いてもよい。
本発明の熱可塑性エラストマー組成物は、好ましくは、成分(e)熱伝導性充填材を更に含む。熱伝導性充填材は、通常、導電性を有するものと電気絶縁性を有するものとに分類することができる。また樹脂への混合性を考慮した各種の表面処理タイプがあり、目的に応じて使い分けられている。更に形状としては、粉状、繊維状、鱗片状等がある。これらの中で電池パック保護部材に求められる特性から、上記成分(e)としては、高い電気絶縁性を有する熱伝導性充填材が好ましい。また熱伝導性の異方性の問題から非繊維状のものが好ましい。より好ましくは粉状である。具体的には、上記成分(e)としては、珪酸マグネシウム、酸化マグネシウム、炭酸マグネシウム、及び窒化硼素などが好ましい。上記成分(e)としては、これらの1種又は2種以上を好ましく用いることができる。
本発明の熱可塑性エラストマー組成物には、更に、成分(f1)ポリフェニレンエーテル系樹脂を含ませることができる。ポリフェニレンエーテル樹脂は、耐熱性、電気的特性、及び耐薬品性に優れたエンジニアリングプラスチックであり、ポリスチレンと完全相溶することは公知であるが、一方で、流動性が悪く成形加工が困難であるという欠点を有しているため、成形加工性、流動性、及び耐衝撃性の改良を目的として、ポリスチレン系樹脂を配合したスチレン変性ポリフェニレンエーテル樹脂として使用されるのが一般的である。本発明の熱可塑性エラストマー組成物に、更に上記成分(f1)を、上記成分(a)と上記成分(b)との合計100質量部に対し、2~8質量部含ませることにより、耐電解液性、特に高温の電解液に対する耐溶解性を高めることができる。上記成分(f1)としては、ポリフェニレンエーテル樹脂を用いてもよく、スチレン変性ポリフェニレンエーテル樹脂を用いてもよい。
本発明の熱可塑性エラストマー組成物には、更に、成分(f2)ポリプロピレン系樹脂を含ませることができる。上記成分(f2)を、上記成分(a)と上記成分(b)との合計100質量部に対し、1~10質量部含ませることにより、耐電解液性や成形加工性を高めることができる。
本発明の熱可塑性エラストマー組成物には、更に、成分(f3)ポリ酢酸ビニル系樹脂を含ませることができる。上記成分(f3)を、上記成分(a)と上記成分(b)との合計100質量部に対し、1~10質量部含ませることにより、成形加工性を高めることができる。
20L容量加圧ニーダーを使用し、表1~7の何れか1に示す配合比の配合物を、排出温度175℃の条件で溶融混練した。得られた組成物を、ダイス設定温度210℃の条件でホットカット法によりペレットを得た。続いて得られたペレットを用い、加熱プレス機を使用し、温度220℃、予熱時間3分、加圧時間3分の条件で熱プレス後、直ちに温度30℃、加圧時間3分の条件で冷プレスして厚み1mmのプレスシートを得た。また同様にして2mm、3mm、6mmの各厚みのプレスシートをそれぞれ得た。以上の工程の製造性を下記の基準で評価した。また下記の試験(3)~(8)を行った。結果を表1~7の何れか1に示す。
(1)製造性:
〇:特に問題なく、各厚みの良好なプレスシートを得ることができた。
△:特に問題なく、各厚みのプレスシートを得ることができた。しかし、プレスシートには変色が認められた。
×:上記工程中に下記の少なくとも何れか1の不具合があった。
・加圧ニーダーによる溶融混練が過負荷で安定しない。
・造粒ができない。
・分解ガス発生。
・プレスシートの著しい変色。
(評価基準) ○評価であるものを合格とした。
(2)二軸押出機のトルク:
○:全く問題なし。
△:トルクが上限近くに達する。
×:オーバートルクによりスクリュウの回転数変動(押出量変動)又は停止が認められる。
(評価基準) ○評価であるものを合格とした。
(3)電気絶縁性:
JIS K6271:2008に従い、サンプルとして上記で得た1mm厚のプレスシートを用い、二重リング法で測定した。
(評価基準) 10の14乗Ωcm以上を合格とした。
測定装置として京都電子工業株式会社「Kemtherm QTM―D3(商品名)」を使用し、サンプルとして上記で得た6mm厚のプレスシートを用い、25℃(室温)の条件で、JIS R2616:2001に規定の熱線法により測定を行った。熱伝導の方向は試験片の厚さ方向である。
(評価基準) 1.2W/(m・K)以上を合格とした。
UL94の垂直燃焼試験法に従い測定した。サンプルには上記で得た1mm厚のプレスシートを用いた。
(評価基準) ランクがV-0であるものを合格とした。
40mm単軸押出機に圧縮比(CR)2.7のスクリュウ、及び7mm外径、1mm厚のチューブ成形金型を装着した装置を使用し、スクリュウ回転15r.p.m、金型出口樹脂温度230℃、引落率(得られたチューブの厚みに対する金型の厚み寸法の割合として算出する。)1.3の条件で、チューブの押出成形加工を行った。以下の基準で押出成形加工性と成形品の外観を評価した。
(6-1)偏肉:
○:偏肉が無く、寸法通りのものが得られる。
△:吐出ムラ(サージング)が若干認められ、部分的に偏肉が発生する。
×:吐出ムラ(サージング)が顕著に認められ、偏肉が激しい。
(6-2)押出トルク;
○:全く問題なし。
△:負荷が高く、トルクが上限近くに達する。
×:オーバートルクによりスクリュウの回転数変動(押出量変動)が認められる。
(6-3)成形品(チューブ)の外観:
〇:チューブ表面に肌荒れ等の外観不良は認められない。
△:チューブ表面に部分的に肌荒れ等の外観不良が認められる。
×:チューブ表面に顕著な肌荒れ等の外観不良が認められる。
(評価基準) ○評価であるものを合格とした。
上記試験(6)で成形した押出チューブを、長さ40mmに裁断し、温度23℃、相対湿度50%の環境下で24時間以上状態調整を行った後、同環境下でチューブを単三電池に、チューブと電池との間に隙間が生じないように装着した。
○:容易に装着できる。チューブと電池との間に隙間は生じない。
△:装着し難い。しかし、チューブと電池との間に隙間は生じない。
×:装着ができない、又は装着が非常に困難であり、チューブと電池との間に隙間が生じる。
(評価基準) ○評価であるものを合格とした。
上記試験(7)で得たチューブを単三電池に装着した装着体を、70℃の環境中に24時間曝し、温度23℃、相対湿度50%の環境下で24時間以上状態調整を行った後、チューブと電池との間に隙間が生じているか否かを目視観察した。なお上記試験(7)が×評価の場合は、試験を省略した。
○:問題なし
△:チューブと電池との間に微小な隙間が生じた。
×:チューブと電池との間に隙間が生じた。
(評価基準) ○評価であるものを合格とした。
上記試験(8)の試験後の装着体を、更に、-30℃の環境下に24時間曝し、温度23℃、相対湿度50%の環境下で24時間以上状態調整を行った後、チューブと電池との間に隙間が生じているか否かを目視観察した。なお上記試験(7)が×評価の場合、及び上記試験(8)が×評価の場合は、試験を省略した。
○:問題なし
△:チューブと電池との間に微小な隙間が生じた。
×:チューブと電池との間に隙間が生じた。
(評価基準) ○評価であるものを合格とした。
ヘキサフルオロリン酸リチウム水溶液(リチウム塩濃度1モル/リットル)に、上記で得た1mm厚プレスシートを、温度80℃で2時間、浸漬した後のプレスシートの状態を目視観察した。またポリフェニレンエーテル樹脂を含むサンプルについては、100℃で2時間浸漬する条件でも同様の試験を行った。評価基準は以下の通りである。
○:全く変化なし。
△:シート形状が若干変化、もしくは膨潤が認められる。
×:シートの一部が溶解した。
(評価基準) ○評価であるものを合格とした。
JIS K6253-3:2012に従い、タイプAの15秒値を測定した。サンプルには、上記で得た6mm厚プレスシートを用いた。
(評価基準) 80以下を合格とした。
上記試験(6)で成形したチューブを、70℃のギアオーブン中に168時間入れ、その後のチューブ表面のベタツキを目視、及び触感により、以下の基準で評価した。
○:成形品表面にベタツキを感じない。
△:若干ベタツキがある。
×:ベタツキがあり、手で触ると手に汚れが付く。
(評価基準) ×評価ではないものを合格とした。
成分(a):
(a-1-1)クラレ株式会社のスチレン-エチレン・プロピレン-スチレンブロック共重合体「セプトン2063(商品名)」。スチレンに由来する構造単位の含有量13質量%、デュロメータ硬さ(タイプA 15秒値)36、Mw65,000、Mw/Mn 1.3。
(a-1-2)クラレ株式会社のスチレン-エチレン・プロピレン-スチレンブロック共重合体「セプトン4033(商品名)」。スチレンに由来する構造単位の含有量30質量%、デュロメータ硬さ(タイプA、15秒値)76、Mw130,000、Mw/Mn 1.3。
(a-1-3)クラレ株式会社のスチレン-エチレン・プロピレン-スチレンブロック共重合体「セプトン2104(商品名)」。スチレンに由来する構造単位の含有量65質量%、デュロメータ硬さ(タイプA、15秒値)98、Mw91,000、Mw/Mn 1.3。
(a-2-1)JSR株式会社のスチレンと共役ジエン化合物とのランダム共重合体の水素添加物(HSBR)「ダイナロン1320P(商品名)」。スチレンに由来する構造単位の含有量10質量%、デュロメータ硬さ(タイプA、15秒値)41、Mw300,000、Mw/Mn1.1、JIS K7244-4:1999に従い測定した動的固定粘弾性特性の試験において引張損失正接のピークが単一のピークとして-25℃近辺に観察される。
(a’-1)デュポン・ダウ・エラストマージャパンのポリエチレン系プラストマー(エチレン・オクテン-1ランダム共重合体)「エンゲージ8150(商品名)」。デュロメータ硬さ(タイプA、15秒値)75。
(b-1)出光興産株式会社のパラフィンオイル「PW-90(商品名)」。
(c-1)旭化成ケミカルズ株式会社の無水マレイン酸変性スチレン-エチレン・ブテン-スチレンブロック共重合体「M1913(商品名)」。デュロメータ硬さ(タイプA 15秒値)84。
(c-2)デュポン株式会社の無水マレイン酸変性ポリエチレン「N493(商品名)」。
(c-3)三井化学株式会社の無水マレイン酸変性ポリプロピレン「アドマーQE800(商品名)」。」
(c-4)旭化成ケミカルズ株式会社のアミン変性スチレン-エチレン・ブテン-スチレンブロック共重合体「タフテックMP10(商品名)」。
(c-5)日油株式会社のエチレングリシジルメタクリレート変性ポリプロピレン「モディパーA4300(商品名)」。
(d-1)神島化学工業株式会社の合成水酸化マグネシウム「マグシーズBN―6(商品名)」。平均粒子径 1.0μm。粒子表面を脂肪酸で処理。
(d-2)神島化学工業株式会社の合成水酸化マグネシウム「マグシーズS-6(商品名)」。平均粒子径1.0μm。粒子表面をシラン化合物と脂肪酸とで処理。
(d-3)協和化学工業株式会社の合成水酸化マグネシウム「キスマ5P(商品名)」。平均粒子径0.82μm。粒子表面をシラン系カップリング剤で処理。
(d’-1)昭和電工株式会社の水酸化アルミニウム「H42M(商品名)」。平均粒子径1.0μm。粒子表面をシラン化合物と脂肪酸とで処理。
(e-1)宇部マテリアル株式会社の酸化マグネシウム「Rf-50(商品名)」。平均粒子径50μm。粒子表面をビニルアルコキシシランで処理。
(e-2)日本タルク株式会社の珪酸マグネシウム(Mg3Si4O10(OH)2)「タルクP-4(商品名)」。平均粒子径4.5μm。
(e-3)神島化学工業株式会社の酸化マグネシウム「スターマグSL-WR(商品名)」。平均粒子径9.8μm。
(e-4)宇部マテリアル株式会社の酸化マグネシウム「Rf-70(商品名)」。平均粒子径70μm。粒子表面をビニルアルコキシシランで処理。
(e-5)神島化学工業株式会社の炭酸マグネシウム「MSPS(商品名)」
(e-6)電気化学工業株式会社の窒化硼素「SGB(商品名)」
(f1-1)旭化成ケミカルズ株式会社のスチレン変性ポリフェニレンエーテル樹脂(PPO)「ザイロンX9102(商品名)」。
(f2-1)日本ポリプロ株式会社のポリプロピレン系樹脂(PP)「FW4BT(商品名)」。融点139℃、メルトマスフローレート6.5g/10分。
(f3-1)三井デュポンポリケミカル株式会社のエチレン-酢酸ビニル共重合体「V9000(商品名)」。酢酸ビニルに由来する構成単位の含有量41質量%、デュロメータ硬さ(タイプA、15秒値)54。
Claims (5)
- (a)芳香族ビニル化合物と共役ジエン化合物との共重合体の水素添加物20~80質量%と、
(b)非芳香族系ゴム用軟化材80~20質量%とからなり、
ここで上記成分(a)と上記成分(b)との合計は100質量%である、樹脂組成物100質量部;
(c)変性樹脂 0.1~10質量部;及び
(d)水酸化マグネシウム 250~400質量部;
を含む、電池パック保護部材用熱可塑性エラストマー組成物。 - 上記成分(c)が、無水マレイン酸を用いて変性された芳香族ビニル化合物と共役ジエン化合物との共重合体の水素添加物を含む、請求項1に記載の熱可塑性エラストマー組成物。
- 上記成分(a)が、
(a-1)スチレンに由来する構成単位の含有量が5~40質量%であるスチレンと共役ジエン化合物とのブロック共重合体の水素添加物 20~100質量%と、
(a-2)スチレンに由来する構成単位の含有量が5~40質量%であるスチレンと共役ジエン化合物とのランダム共重合体の水素添加物 80~0質量%とからなり、
ここで上記成分(a-1)と上記成分(a-2)との合計は100質量%である、
請求項1又は2に記載の熱可塑性エラストマー組成物。 - 更に、(e)酸化マグネシウム、珪酸マグネシウム、炭酸マグネシウム、及び窒化硼素からなる群から選択される1以上を含む熱伝導性充填材を、上記樹脂組成物100質量部に対し、25~200質量部含む、請求項1~3の何れか1項に記載の熱可塑性エラストマー組成物。
- 請求項1~4の何れか1項に記載の熱可塑性エラストマー組成物を含む、電池。
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KR102191602B1 (ko) * | 2018-01-26 | 2020-12-15 | 주식회사 엘지화학 | 간극 충전재 |
JP7235045B2 (ja) * | 2018-04-03 | 2023-03-08 | 日本ゼオン株式会社 | 非水系二次電池機能層用バインダー組成物、非水系二次電池機能層用スラリー組成物、非水系二次電池部材、および非水系二次電池 |
WO2023195743A1 (ko) * | 2022-04-04 | 2023-10-12 | 주식회사 엘지화학 | 리튬이차전지용 절연층 조성물 및 이를 포함하는 리튬이차전지 |
CN115692845B (zh) * | 2022-10-31 | 2024-02-02 | 重庆大学 | 一种不含氟以外卤素可充镁电池电解液及其制备方法和应用 |
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- 2015-12-22 KR KR1020177020876A patent/KR20170122722A/ko unknown
- 2015-12-22 CN CN201580070219.1A patent/CN107431146A/zh active Pending
- 2015-12-22 US US15/539,252 patent/US20170342235A1/en not_active Abandoned
- 2015-12-22 EP EP15873070.5A patent/EP3240059A4/en not_active Withdrawn
- 2015-12-22 JP JP2016566387A patent/JPWO2016104502A1/ja active Pending
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JPWO2016104502A1 (ja) | 2017-11-02 |
CN107431146A (zh) | 2017-12-01 |
EP3240059A1 (en) | 2017-11-01 |
KR20170122722A (ko) | 2017-11-06 |
EP3240059A4 (en) | 2018-08-29 |
US20170342235A1 (en) | 2017-11-30 |
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