WO2022210323A1 - 樹脂組成物および成形体 - Google Patents
樹脂組成物および成形体 Download PDFInfo
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- WO2022210323A1 WO2022210323A1 PCT/JP2022/014241 JP2022014241W WO2022210323A1 WO 2022210323 A1 WO2022210323 A1 WO 2022210323A1 JP 2022014241 W JP2022014241 W JP 2022014241W WO 2022210323 A1 WO2022210323 A1 WO 2022210323A1
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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
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08L71/12—Polyphenylene oxides
- C08L71/123—Polyphenylene oxides not modified by chemical after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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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
- 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
-
- 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
- C08L23/12—Polypropene
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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
- C08L53/00—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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08L71/12—Polyphenylene oxides
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
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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
- H01M50/184—Sealing members characterised by their shape or structure
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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
- H01M50/186—Sealing members characterised by the disposition of the sealing members
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
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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 resin compositions and molded articles.
- it relates to a resin composition containing polyphenylene ether resin as a main component.
- the present invention also relates to a resin composition suitable for forming gaskets for non-aqueous electrolyte batteries.
- Non-aqueous electrolyte batteries are a general term for batteries whose electrolyte is an organic solvent, and consist of rechargeable lithium-ion batteries and non-rechargeable lithium batteries.
- Non-aqueous electrolyte batteries have long been used as power sources for toys, flashlights, and other electric and electronic devices, and have been used for various purposes as high-voltage, high-capacity portable power sources.
- Lithium batteries in particular, are used as power sources for various electrical and electronic devices, and are often used in places where it is difficult to replace batteries, such as the back of electronic substrates, and are therefore required to have extremely high reliability.
- the lithium battery is filled with an electrolytic solution, and a gasket is provided to insulate the positive electrode from the negative electrode and prevent leakage of the electrolytic solution.
- the gasket is also required to be stable with respect to substances inside the battery such as electrolyte and electrolyte.
- materials for forming such a gasket for example, those described in Patent Document 1 and Patent Document 2 are known.
- a resin composition using a polypropylene resin and a polyphenylene ether resin the one described in Patent Document 3 is known.
- gaskets are required to have heat resistance because they are exposed to high temperatures.
- the gasket fails to function when heat and load are applied, it causes electrolyte leakage. Therefore, the gasket is required to follow stress even when the temperature rises.
- An object of the present invention is to solve such problems, and to provide a resin composition and a molded article capable of providing a molded article having sufficient toughness to withstand heat and load. intended to
- the polypropylene resin (b) is a polypropylene resin having a melt flow rate (MFR) of 8.0 g/10 minutes or less at a load of 2.16 kg and a temperature of 230 ° C. measured according to JISK7210, and the MFR of 10
- MFR melt flow rate
- ⁇ 6> The resin composition according to any one of ⁇ 1> to ⁇ 5>, further comprising (d) a polystyrene resin having a weight average molecular weight (Mw) of 3,000 to 20,000.
- Mw weight average molecular weight
- c2 isoprene polymer block
- the isoprene polymer block (c2) contains a block consisting of the following structural units, m is a positive integer, and (c) the vinyl aromatic compound block (c1) and the isoprene polymer block in the block copolymer
- FIG. 1 is a cross-sectional view showing a schematic configuration of a flat sealed battery using a gasket according to one embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a sealing plate (FIG. 2(a)) and an outer can (FIG. 2(b)) produced by press molding.
- FIG. 3 is a cross-sectional view showing a gasket integrally formed on the inner surface of the outer can by insert molding.
- FIG. 4 is a cross-sectional view showing a state before fitting the outer can (positive electrode can) to the sealing plate (negative electrode can) and crimping the side walls of the outer can.
- FIG. 5 is a partially enlarged cross-sectional view showing a state in which the outer can (positive electrode can) is fitted to the sealing plate (negative electrode can) and the sidewall of the outer can is crimped.
- the resin composition of the present embodiment contains (c ) contains 5.0 to 30.0 parts by mass of a block copolymer, and (c) the block copolymer is a hydrogenated product containing a vinyl aromatic compound block (c1) and an isoprene polymer block (c2). and (c) the content of the vinyl aromatic compound unit in the block copolymer is 50% by mass or more and less than 80% by mass.
- the isoprene polymer block (C2) has an ethylene-propylene alternating copolymer structure, it is presumed to exhibit excellent compatibility with polypropylene and ideal rubber-like properties.
- the blending ratio of the above components (a) to (c) and the ratio of vinyl aromatic compound units in the block copolymer (c) sufficient toughness is obtained even when heat and load are applied. It is presumed that a resin composition capable of providing a molded article having Details of the present embodiment will be described below.
- the resin composition of this embodiment contains a polyphenylene ether resin.
- a polyphenylene ether resin By containing a polyphenylene ether resin, a molded article having high heat resistance and mechanical strength inherent in the polyphenylene ether resin can be obtained.
- a known polyphenylene ether resin can be used, for example, a polymer having a structural unit represented by the following formula in its main chain .
- the polyphenylene ether resin may be either a homopolymer or a copolymer.
- R a are each independently a hydrogen atom, a halogen atom, a primary or secondary alkyl group, an aryl group, an aminoalkyl group, a halogenated alkyl group, a hydrocarbonoxy group, or a halogenated represents a hydrocarbonoxy group
- R b are each independently a hydrogen atom, a halogen atom, a primary or secondary alkyl group, an aryl group, a halogenated alkyl group, a hydrocarbonoxy group, or a halogenated hydrocarbon represents a hydrogen oxy group, provided that both R a are not hydrogen atoms.
- R a and R b are each independently preferably a hydrogen atom, a primary or secondary alkyl group, or an aryl group.
- Preferred examples of primary alkyl groups include methyl, ethyl, n-propyl, n-butyl, n-amyl, isoamyl, 2-methylbutyl, 2,3-dimethylbutyl, 2 -, 3- or 4-methylpentyl groups or heptyl groups.
- Suitable examples of secondary alkyl groups include, for example, isopropyl, sec-butyl and 1-ethylpropyl groups.
- R a is preferably a primary or secondary alkyl group having 1 to 4 carbon atoms or a phenyl group.
- Rb is preferably a hydrogen atom.
- Preferred (a) polyphenylene ether resin homopolymers include, for example, poly(2,6-dimethyl-1,4-phenylene ether), poly(2,6-diethyl-1,4-phenylene ether), poly (2,6-dipropyl-1,4-phenylene ether), poly(2-ethyl-6-methyl-1,4-phenylene ether), poly(2-methyl-6-propyl-1,4-phenylene ether) and polymers of 2,6-dialkylphenylene ethers such as Copolymers include 2,6-dimethylphenol/2,3,6-trimethylphenol copolymer, 2,6-dimethylphenol/2,3,6-triethylphenol copolymer, 2,6-diethylphenol /2,3,6-trimethylphenol copolymer, 2,6-dialkylphenol/2,3,6-trialkylphenol copolymer such as 2,6-dipropylphenol/2,3,6-trimethylphenol copolymer Polymer, graf
- Poly(2,6-dimethyl-1,4-phenylene ether), 2,6-dimethylphenol/2,3,6-trimethylphenol random copolymer is particularly used as the (a) polyphenylene ether resin in the present embodiment. is preferred.
- polyphenylene ether resins in which the number of terminal groups and the copper content are specified as described in JP-A-2005-344065 can also be preferably used.
- the polyphenylene ether resin preferably has an intrinsic viscosity of 0.2 to 0.8 dL/g, more preferably 0.3 to 0.6 dL/g, measured in chloroform at 30°C.
- the intrinsic viscosity is 0.2 dL/g or more, the mechanical strength of the resin composition tends to be further improved. tends to be easier.
- two or more (a) polyphenylene ether resins having different intrinsic viscosities may be used in combination to set the intrinsic viscosity within this range.
- the method for producing the (a) polyphenylene ether resin used in the present embodiment is not particularly limited.
- a method of oxidative polymerization can be employed, and the intrinsic viscosity can be controlled within a desired range by selecting the reaction conditions. Control of intrinsic viscosity can be achieved by selecting conditions such as polymerization temperature, polymerization time, amount of catalyst, and the like.
- the resin composition of the present embodiment preferably contains (a) a polyphenylene ether resin in a proportion of 38.0% by mass or more in the resin composition, more preferably 40.0% by mass or more, Furthermore, it may be 42.0% by mass or more.
- the content is at least the lower limit, it is possible to further improve the heat resistance (especially deflection temperature under load) and bending properties of the obtained molded product.
- the upper limit for example, it is preferably contained at a rate of 76.0% by mass or less, more preferably at a rate of 70.0% by mass or less, and further preferably at a rate of 65.0% by mass or less.
- the polyphenylene ether resin may be used singly or in combination of two or more. When two or more kinds are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment contains (b) a polypropylene resin.
- the (b) polypropylene resin used in the present embodiment is a propylene homopolymer, or a copolymer obtained by copolymerizing propylene with other ⁇ -olefins (e.g., ethylene, butene-1, hexene-1, etc.).
- the proportion of propylene is more than 50% by mass, preferably 80% by mass or more), and more preferably a propylene homopolymer.
- the polypropylene resin (b) is a polypropylene resin having a melt flow rate (MFR) of 8.0 g/10 minutes or less at a load of 2.16 kg and a temperature of 230 ° C. measured according to JISK7210, and the MFR is preferably 10.0 g/10 minutes or more of polypropylene resin.
- MFR melt flow rate
- the MFR of the polypropylene resin having an MFR of 8.0 g/10 min or less is preferably 2.0 g/10 min or more, more preferably 4.0 g/10 min or more, and 7.0 g/10 min or more. It is preferably 10 minutes or less, more preferably 6.5 g/10 minutes or less.
- the MFR of the polypropylene resin having an MFR of 10.0 g/10 min or more is preferably 11.0 g/10 min or more, more preferably 11.5 g/10 min or more.
- the difference between the MFR of the polypropylene resin having an MFR of 8.0 g/10 min or less and the MFR of 10.0 g/10 min or more is preferably 2.0 g/10 min or more, and 4.0 g/10 min. minutes or more, preferably 10.0 g/10 minutes or less, and more preferably 8.0 g/10 minutes or less.
- Such a range tends to result in a resin composition exhibiting both moldability and nominal tensile strain at high levels.
- the mass ratio of the polypropylene resin having an MFR of 8.0 g/10 min or less and the polypropylene resin having an MFR of 10.0 g/10 min or more is preferably 1:1 to 5:1, preferably 1.5:1. ⁇ 4:1 is more preferred, and 2:1 to 4:1 is even more preferred.
- only one type of polypropylene resin may be used, and when one type of polypropylene resin is used, it is preferable to use a polypropylene resin having an MFR of 2.0 to 16.0 g/10 minutes or less.
- the resin composition of the present embodiment contains (c) block copolymer in a proportion of 5.0 to 30.0 parts by mass with respect to a total of 100 parts by mass of (a) polyphenylene ether resin and (b) polypropylene resin.
- the (c) block copolymer is a hydrogenated product containing a vinyl aromatic compound block (c1) and an isoprene polymer block (c2), and (c) the block copolymer contains vinyl aromatic compound units.
- the amount is 50% by mass or more and less than 80% by mass. With such a structure, the tensile nominal strain can be increased even when the resulting molded article is exposed to high temperatures.
- the block copolymer contains a vinyl aromatic block (c1). Since the vinyl aromatic compound block (c1) has excellent compatibility with (a) polyphenylene ether resin, it can improve the dispersibility of (c) block copolymer in (a) polyphenylene ether resin, It is possible to improve the toughness and impact resistance of the entire resin composition or a molded article obtained from the resin composition. In addition, when an elastomer component is blended into the resin composition, the heat resistance tends to decrease. , the deterioration of the heat resistance of the resin composition can be effectively suppressed.
- the vinyl aromatic compound block (c1) is mainly composed of vinyl aromatic compound units (preferably styrene units), and preferably 90% by mass or more of the vinyl aromatic compound block (c1), more preferably 95% by mass or more, more preferably 98% by mass or more, are vinyl aromatic compound units.
- L 1 is a single bond or a divalent linking group, preferably a single bond or a divalent linking group with a formula weight of 14 to 100, and a single bond or a divalent link with a formula weight of 14 to 50.
- L 1 is a divalent linking group, it is preferably an aliphatic hydrocarbon group or a group consisting of a combination of an aliphatic hydrocarbon group and —O—.
- the formula weight means the mass (g) per mole of the portion corresponding to L1 of the aromatic vinyl compound.
- Ar 1 is an aromatic ring group, preferably a substituted or unsubstituted benzene ring group or naphthalene ring (preferably a benzene ring), more preferably an unsubstituted benzene ring group.
- the aromatic vinyl compound is preferably a compound with a molecular weight of 104-600, more preferably a compound with a molecular weight of 104-400.
- aromatic vinyl compounds include styrene, ⁇ -methylstyrene, o-methylstyrene, p-methylstyrene, vinylxylene, ethylstyrene, dimethylstyrene, p-tert-butylstyrene, vinylnaphthalene, methoxystyrene, monobromostyrene, Styrenic monomers (styrene derivatives) derived from dibromostyrene, fluorostyrene, tribromostyrene and the like can be mentioned, and styrene is particularly preferred.
- the (c) block copolymer also contains an isoprene polymer block (c2).
- the isoprene polymer block (c2) becomes an alternating copolymer structure of ethylene and propylene by hydrogenation, and is stretched softly, so that the nominal tensile strain can be effectively improved.
- the isoprene polymer block (c2) is mainly composed of isoprene units, and preferably accounts for 90% by mass or more, more preferably 95% by mass or more, and still more preferably 98% by mass of the isoprene polymer block (c2). % or more are isoprene units.
- the content of vinyl aromatic compound units in the (c) block copolymer is 50% by mass or more, preferably 55% by mass, and more preferably 60% by mass or more.
- the content of the vinyl aromatic compound unit in the block copolymer (c) is less than 80% by mass, preferably 75% by mass or less, more preferably 70% by mass or less, and 66 % by mass or less is more preferable.
- the vinyl aromatic compound unit is not limited to the vinyl aromatic compound unit contained in the vinyl aromatic compound block (c1), and the vinyl aromatic compound contained in any position of the block copolymer (c). It is intended to include units.
- the (c) block copolymer used in the present embodiment preferably has a vinyl aromatic compound block (c1) at least one end of the molecule, more preferably at both ends of the molecule.
- the isoprene polymer block (c2) contains a block composed of the following structural units, and m is a positive integer.
- the (c) block copolymer used in the present embodiment may contain regions other than the vinyl aromatic compound block (c1) and the isoprene polymer block (c2), but the ratio of the other region is , (c) It is preferably 20% by mass or less of the block copolymer, more preferably 15% by mass or less, further preferably 10% by mass or less, and even more preferably 5% by mass or less. It is preferably 3% by mass or less, even more preferably 2% by mass or less, and particularly preferably 1% by mass or less.
- block copolymers include hydrogenated styrene/isoprene copolymer (SEP), hydrogenated styrene/isoprene/styrene copolymer (SEPS), and styrene/isoprene/butylene/styrene copolymer.
- SEP hydrogenated styrene/isoprene copolymer
- SEPS hydrogenated styrene/isoprene/styrene copolymer
- SEPS coalesced hydrogenates
- SEPS styrene/isoprene/styrene copolymer hydrogenates
- the block copolymer (c) preferably contains a structure represented by the following formula (c), and the structure represented by the following formula (c) accounts for 80% by mass or more of the total preferably 85% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, even more preferably 97% by mass or more, and 98 It is even more preferable to account for 99% by mass or more, and particularly preferably 99% by mass or more.
- formula (c) (In the formula (c), l, m, and n are each positive numbers, and the sum of the unit represented by l and the unit represented by n has a mass ratio of styrene units of 50% by mass or more and 80% by mass. It is a value that is less than % by mass.)
- the (c) block copolymer preferably flows when measured under a load of 2.16 kg and a temperature of 230°C according to JISK7210.
- the melt flow rate is preferably 0.1 g/10 minutes or more, more preferably 0.15 g/10 minutes or more, and even more preferably 0.3 g/10 minutes or more.
- the MFR is preferably 7.0 g/10 min or less, more preferably 5.0 g/10 min or less, even more preferably 3.0 g/10 min or less, and 2.0 g /10 minutes or less is more preferable, and it may be 1.0 g/10 minutes or less.
- the resin composition of the present embodiment contains (c ) contains 5.0 to 30.0 parts by mass of a block copolymer.
- the mass ratio of (a) polyphenylene ether resin and (b) polypropylene resin ((a):(b)) is preferably 50.0 to 70.0 parts by mass: 50.0 to 30.0 parts by mass. , 50.0 to 65.0 parts by mass: more preferably 50.0 to 35.0 parts by mass, 50.1 to 61.0 parts by mass: 49.9 to 39.0 parts by mass More preferably, it is 50.1 to 59.9 parts by mass: 49.9 to 40.1 parts by mass.
- the content of the (c) block copolymer in the resin composition of the present embodiment is 5.0 parts by mass or more with respect to a total of 100 parts by mass of the (a) polyphenylene ether resin and (b) the polypropylene resin, It is preferably 6.0 parts by mass or more, more preferably 7.0 parts by mass or more, even more preferably 8.0 parts by mass or more, and even more preferably 9.0 parts by mass or more. , 10.0 parts by mass or more, 11.0 parts by mass or more, or 12.0 parts by mass or more. By adjusting the content to be at least the above lower limit, it is possible to impart superior toughness and impact resistance to the resin composition.
- the content of the (c) block copolymer in the resin composition of the present embodiment is 30.0 parts by mass or less with respect to a total of 100 parts by mass of the (a) polyphenylene ether resin and (b) the polypropylene resin. It is preferably 28.0 parts by mass or less, more preferably 27.0 parts by mass or less, may be 25.0 parts by mass or less, or may be 23.0 parts by mass or less. , 20.0 parts by mass or less.
- the content is 30.0 parts by mass or less with respect to a total of 100 parts by mass of the (a) polyphenylene ether resin and (b) the polypropylene resin. It is preferably 28.0 parts by mass or less, more preferably 27.0 parts by mass or less, may be 25.0 parts by mass or less, or may be 23.0 parts by mass or less. , 20.0 parts by mass or less.
- the mass ratio ((b)/(c)) of the polypropylene resin (b) and the block copolymer (c) is preferably 1.0 or more, more preferably 1.5 or more. It is preferably 2.0 or more, more preferably 2.5 or more, and may be 3.0 or more. When the content is at least the above lower limit, there is a tendency that the nominal tensile strain and impact resistance of the resulting molded article at high temperatures are further improved.
- the above (b)/(c) is preferably 5.0 or less, more preferably 4.7 or less, may be 4.3 or less, and further is 3.8 or less. There may be.
- the resin composition of the present embodiment may contain only one type of (a) polyphenylene ether resin, (b) polypropylene resin, and (c) block copolymer, or may contain two or more types. You can When two or more types are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment further contains (d) a polystyrene resin having a weight average molecular weight (Mw) of 3,000 to 20,000 (hereinafter sometimes referred to as "(d) low molecular weight polystyrene"). You can stay. (d) By including low-molecular-weight polystyrene, the tensile nominal strain of the resulting molded article can be increased, and the impact resistance can be further improved.
- the low molecular weight polystyrene preferably has a glass transition temperature (Tg) of, for example, 20 to 60°C, more preferably 30 to 52°C.
- Tg glass transition temperature
- Low-molecular-weight polystyrene is preferably mainly composed of styrene units, more preferably 80% by mass or more of styrene units, and even more preferably 90% by mass or more of styrene units.
- Low molecular weight polystyrene has a weight average molecular weight (Mw) of 3,000 or more, preferably 5,000 or more, more preferably 8,000 or more.
- the weight average molecular weight (Mw) of (d) low molecular weight polystyrene is preferably 20,000 or less, more preferably 15,000 or less, and even more preferably 12,000 or less.
- Mw weight average molecular weight
- the content is equal to or less than the upper limit, the fluidity of the polyphenylene ether resin is increased, the dispersibility of the polyphenylene ether domains is improved, and the toughness and impact resistance of the resulting molded article tend to be improved.
- the content thereof is preferably 0.5 parts by mass or more, and 1.0 parts by mass or more, relative to 100 parts by mass of the resin composition. It is more preferably 1.5 parts by mass or more, even more preferably 2.0 parts by mass or more, and may be 2.5 parts by mass or more.
- the content is at least the above lower limit, the fluidity of the polyphenylene ether resin is increased, the dispersibility of the polyphenylene ether domains is improved, and the toughness and impact resistance of the obtained molded article tend to be improved.
- the content of the (d) low-molecular-weight polystyrene is preferably 10.0 parts by mass or less, more preferably 8.0 parts by mass or less, and 5.0 parts by mass with respect to 100 parts by mass of the resin composition. It is more preferably 4.5 parts by mass or less, and may be 4.0 parts by mass or less. When the content is equal to or less than the above upper limit, it tends to be possible to more effectively suppress deterioration of mechanical properties such as heat resistance and tensile properties and bending properties.
- the resin composition of the present embodiment may contain only one type of (d) low-molecular-weight polystyrene, or may contain two or more types. When two or more types are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment may contain stabilizers such as heat stabilizers and antioxidants.
- stabilizers include phenol-based stabilizers, amine-based stabilizers, phosphorus-based stabilizers, thioether-based stabilizers, and the like. Among them, phosphorus-based stabilizers and phenol-based stabilizers are preferred in the present invention. Any known phosphorus stabilizer can be used.
- phosphorus oxoacids such as phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, and polyphosphoric acid
- acid pyrophosphate metal salts such as sodium acid pyrophosphate, potassium acid pyrophosphate, and calcium acid pyrophosphate
- Group 1 or Group 2B metal phosphates such as potassium phosphate, sodium phosphate, cesium phosphate, and zinc phosphate; Especially preferred.
- organic phosphonite compounds include tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylenediphosphonite, tetrakis(2,5-di-t-butylphenyl)-4,4' -biphenylene diphosphonite, tetrakis(2,3,4-trimethylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,3-dimethyl-5-ethylphenyl)-4,4'-biphenylene diphosphonite night, tetrakis(2,6-di-t-butyl-5-ethylphenyl)-4,4'-biphenylenediphosphonite, tetrakis(2,3,4-tributylphenyl)-4,4'-biphenylenediphosphonite night, tetrakis(2,4,6-tri-t-butylphenyl)-4,4'-
- a hindered phenol stabilizer is preferably used as the phenol stabilizer.
- Specific examples of hindered phenol stabilizers include pentaerythritol tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3-(3,5-di-tert- Butyl-4-hydroxyphenyl)propionate, thiodiethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], N,N'-hexane-1,6-diylbis[3-( 3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], 2,4-dimethyl-6-(1-methylpentadecyl)phenol, diethyl [[3,5-bis(1,1-dimethylethyl )-4-hydroxyphenyl]methyl]phosphate, 3,3′,3′′,5,5
- pentaerythritol tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate preferable.
- hindered phenol-based stabilizers include, for example, "Irganox (registered trademark; hereinafter the same) 1010" and “Irganox 1076" manufactured by BASF, "ADEKA STAB AO-50" and “ADEKA STAB AO-60” and the like.
- the content of the stabilizer in the resin composition of the present embodiment is usually 0.001 parts by mass or more, preferably 0.005 parts by mass or more, more preferably 0.01 parts by mass with respect to 100 parts by mass of the resin composition. or more, and usually 1 part by mass or less, preferably 0.50 parts by mass or less, more preferably 0.30 parts by mass or less.
- the resin composition of the present embodiment may contain only one stabilizer, or may contain two or more stabilizers. When two or more types are included, the total amount is preferably within the above range.
- the resin composition of this embodiment may contain a coloring agent.
- a coloring agent By including a coloring agent, it is possible to impart a tint to the molded article obtained, and there is a tendency for the design to be improved.
- the coloring agent may be a pigment or a dye, but is preferably a pigment.
- Pigments include inorganic pigments (black pigments such as carbon black, red pigments such as iron oxide red, orange pigments such as molybdate orange, white pigments such as titanium oxide), organic pigments (yellow pigments, orange pigments, red pigments, blue pigments, etc.). pigments, green pigments, etc.), and inorganic pigments are preferred, white pigments are more preferred, and titanium oxide is even more preferred.
- the colorant When the colorant is blended with the resin composition of the present embodiment, it may be blended as a masterbatch.
- the resin composition in the present embodiment contains a colorant, the content thereof is preferably 0.01 parts by mass or more, preferably 0.1 parts by mass or more, with respect to 100 parts by mass of the resin composition. More preferably, it is 0.5 parts by mass or more.
- the content of the coloring agent is preferably 10.0 parts by mass or less, more preferably 5.0 parts by mass or less, and 3.0 parts by mass or less with respect to 100 parts by mass of the resin composition. is more preferable.
- the resin composition of the present embodiment may contain only one colorant, or may contain two or more colorants. When two or more types are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment may contain other components than those described above. Specifically, thermoplastic resins such as polyamide resins, polyester resins, polyphenylene sulfide resins, liquid crystal polyester resins, polycarbonate resins, polyacetal resins, polyacrylonitrile resins, acrylic resins, polyethylene resins, epoxy resins, melamine resins, silicone resins, etc. and thermosetting resins. These thermoplastic resins and thermosetting resins can also be used in combination of two or more. Moreover, the resin composition of the present embodiment may contain a resin additive.
- flame retardants phosphorus flame retardants, halogen flame retardants, organometallic flame retardants, etc.
- internal lubricants fatty acid metal salts, polyethylene wax, etc.
- heat stabilizers zinc oxide, etc.
- dyes e.g., dyes, IR-ray diffraction, IR-ray diffraction, etc.
- a release agent sicone oil, fatty acid, fatty acid ester, etc.
- weather resistance improver nucleating agent
- impact resistance improver plasticizer
- fluidity improver and the like
- the total of (a) polyphenylene ether resin, (b) polypropylene resin, (c) block copolymer, and (d) low molecular weight polystyrene is the resin component contained in the resin composition. accounts for preferably 95% by mass or more, more preferably 97% by mass or more, and even more preferably 99% by mass or more.
- the total of (a) polyphenylene ether resin, (b) polypropylene resin, (c) block copolymer, and (d) low molecular weight polystyrene is 96 mass of the resin composition. % or more, more preferably 98 mass % or more, and even more preferably 99 mass % or more.
- the resin composition of the present embodiment contains (a) a polyphenylene ether resin, (b) a polypropylene resin, and (c) a block copolymer, and other components that are optionally blended in a total of 100% by mass. adjusted to be Furthermore, the resin composition of the present embodiment includes (a) a polyphenylene ether resin, (b) a polypropylene resin, (c) a block copolymer, (d) a low molecular weight polystyrene resin, (e) a stabilizer, and (f) ) The total amount of the pigments is preferably 95% by mass or more, more preferably 97% by mass or more, and even more preferably 99% by mass or more, of the resin composition.
- any method is employed as the method for producing the resin composition of the present embodiment.
- each component such as (a) polyphenylene ether resin, (b) polypropylene resin, (c) block copolymer is mixed using a mixing means such as a V-type blender to prepare a batch blended product, followed by venting
- a mixing means such as a V-type blender to prepare a batch blended product, followed by venting
- a method of pelletizing by melt-kneading with an extruder can be used.
- a two-stage kneading method some components are sufficiently mixed in advance, melt-kneaded in an extruder with a vent to produce pellets, and then the pellets and other components are mixed and extruded with a vent.
- a method of melting and kneading with a machine can be mentioned.
- the resin composition of the present embodiment can particularly satisfy the following characteristics.
- the resin composition of the present embodiment preferably has a deflection temperature under load (DTUL) according to ISO-75-1 when molded into an ISO3167:93A type test piece, preferably 100 ° C. or higher, and 101 ° C. or higher. is preferred. Although the upper limit of the deflection temperature under load is not particularly defined, it is practically 120° C. or less, and may be 108° C. or less.
- the resin composition of the present embodiment preferably has a nominal tensile strain X (%) at 23° C. according to ISO-527-1 when molded into an ISO3167:93A test piece of 10.0% or more.
- the resin composition of the present embodiment preferably has a nominal tensile strain Y (%) at 150 ° C. according to ISO-527-1 when molded into an ISO3167:93A type test piece is 10.0% or more. , more preferably 15.0% or more, may be 20.0% or more, further 45.0% or more, and particularly 50.0% or more.
- the upper limit of the tensile nominal strain Y (%) at 150 ° C. according to ISO-527-1 is practically 90.0% or less, and even 70.0% or less satisfies the required performance. It is.
- the resin composition of the present embodiment has a nominal tensile strain X (%) at 23 ° C. according to ISO-527-1 when molded into an ISO3167:93A type test piece, and 150 according to ISO-527-1. It is preferable that the nominal tensile strain Y (%) at °C satisfies Y ⁇ X. By satisfying Y ⁇ X, even if the molded article obtained from the resin composition is exposed to high temperatures, it does not break and can change its shape according to the stress.
- YX is preferably greater than 0%, more preferably 1% or more, even more preferably 2% or more, and may be 40% or more, or even 50%. % or more, particularly 60% or more. Also, YX is practically 95% or less.
- the deflection temperature under load and the nominal tensile strain are measured according to the methods described in Examples below.
- the resin composition of the present embodiment is widely used in applications where polyphenylene ether resins, particularly blends of polyphenylene ether resins and styrene-based elastomers, are generally used.
- Examples include automobile exterior/outer panel parts, automobile interior parts, and automobile underhood parts.
- coating materials for electric wires and cables obtained by coating metal conductors or optical fibers, fuel cases for solid methanol batteries, secondary battery tanks, fuel cell water pipes, water cooling tanks, boiler exterior cases, ink peripherals for inkjet printers It can be used as a lithium-ion battery separator obtained by stretching parts/members and chassis, molded bodies such as water pipes and joints, and sheets/films.
- the resin composition of the present embodiment has excellent heat resistance, and the rate of change in nominal tensile strain at high temperature relative to room temperature (for example, X/Y above) can be 0% or more, so it can follow stress even at high temperature. It can change shape as a result, and is preferably used for forming gaskets for non-aqueous electrolyte batteries.
- non-aqueous electrolyte batteries include lithium batteries and lithium ion batteries, with lithium batteries being more preferred.
- a coin-type lithium battery is shown as one embodiment of a flat sealed battery to which the gasket for non-aqueous electrolyte batteries of the present embodiment is applied.
- the present embodiment can be applied not only to lithium batteries but also to gaskets for various non-aqueous electrolyte batteries.
- the coin-type battery 1 includes an exterior can 2 that is a bottomed cylindrical positive electrode can having a side wall 21, and an exterior can 2 that covers the opening of the exterior can 2 and is disposed inside the exterior can 2.
- a non-aqueous electrolyte (not shown) is enclosed in addition to the power generation element 5.
- the outer can 2 is made of a metal material such as stainless steel, and is formed into a cylindrical shape with a bottom by press molding.
- the outer can 2 has a circular bottom portion 22 and a cylindrical side wall 21 formed continuously with the bottom portion 22 on the outer periphery thereof.
- the side wall 21 is formed in a tapered shape that expands outward with respect to the bottom surface portion 22 in a vertical cross-sectional view before being crimped toward the sealing plate 3 .
- the opening end side of the side wall 21 is bent inward and crimped against the outer peripheral portion of the sealing plate 3 .
- the root part becomes almost vertical.
- the sealing plate 3 is also made of a metal material such as stainless steel, similarly to the outer can 2, and is formed into a cylindrical shape with a bottom by press molding.
- the sealing plate 3 has a circular flat portion 32 and a cylindrical cylindrical portion 31 formed continuously with the flat portion 32 on the outer periphery thereof.
- the cylindrical portion 31 includes a base end portion 31a that expands in diameter from the edge of the flat portion 32, a stepped portion 31b that further expands in diameter from the base end portion 31a, and an open portion that extends substantially vertically downward from the stepped portion 31b. 31c. As shown in FIG. 1, the opening end of the side wall 21 of the outer can 2 is bent and crimped against the stepped portion 31b.
- the gasket 4 is formed in a ring shape by insert molding from the inner opening end of the side wall 21 of the outer can 2 to the edge of the upper surface of the bottom surface portion 22 .
- the outer can 2 and the sealing plate 3 are respectively formed by press molding (see FIGS. 2(a) and 2(b)), and then the gasket 4 is integrally formed on the inner surface side of the side wall 21 of the outer can 2 by injection molding (see FIG. 2(a) and (b)). 3).
- the gasket 4 may be insert-molded with the sealing plate 3 , or may be molded independently and assembled between the outer can 2 and the sealing plate 3 .
- the outer seal wall portion 41 of the gasket 4 is in close contact with the entire inner surface of the side wall 21 of the outer can 2 and is formed with a uniform thickness except for the root portion, and is formed in a substantially cylindrical shape. It is Further, since the outer seal wall portion 41 is injection-molded along the taper of the side wall 21 of the outer can 2, the outer seal wall portion 41 is formed in a tapered shape as a whole so that the inner diameter increases toward the opening end side. .
- the outer seal wall portion 41 By caulking the side wall 21 of the outer can 2, the outer seal wall portion 41 covers the open portion 31c and the stepped portion 31b of the cylindrical portion 31 of the sealing plate 3, and is pressed against the stepped portion 31b side of the base end portion 31a. . 1 and 5, the portion of the outer seal wall portion 41 that faces the stepped portion 31b of the cylindrical portion 31 when the outer can 2 is crimped to the sealing plate 3 is the portion of the outer can 2. It is compressed by the open end of the side wall 21 and the stepped portion 31b of the tubular portion 31 . As a result, the outer seal wall portion 41 seals between the outer can 2 and the sealing plate 3 .
- annular recess 43 and an annular rib 44 are formed in the bottom seal portion 42 of the gasket 4 , and the annular recess 43 is formed to have a groove width substantially equal to the thickness of the open portion 31 c of the cylindrical portion 31 of the sealing plate 3 . .
- the groove width of the annular concave portion 43 may be larger than the thickness of the open portion 31c of the tubular portion 31, or may be slightly narrower.
- the annular rib 44 preferably has a height of more than 0% and 80% or less of the total height of the gasket 4 . More preferably, the height of the annular rib 44 is 10% or more and 50% or less of the total height of the gasket 4 .
- the sealing plate 3 By press-fitting the tip of the open portion 31c of the tubular portion 31 of the sealing plate 3 into the annular recess 43, the sealing plate 3 can be easily positioned with respect to the outer can 2, and the tip of the tubular portion 31 can be inserted into the annular recess 43. Since the parts are press-fitted, the space between the outer can 2 and the sealing plate 3 is reliably sealed. Moreover, the strength of the gasket 4 is also improved by the annular rib 44 .
- the power generating element 5 includes a positive electrode material 51 (electrode material) formed by molding a positive electrode active material or the like into a disc shape, a negative electrode material 52 formed by forming a negative electrode active material metal lithium or a lithium alloy into a disc shape, and a separator 53 made of non-woven fabric. It has As shown in FIG. 1 , the positive electrode material 51 is positioned inside the outer can 2 , and the negative electrode material 52 is positioned inside the sealing plate 3 . A separator 53 is arranged between the positive electrode material 51 and the negative electrode material 52 .
- the positive electrode material 51 contains manganese dioxide as a positive electrode active material.
- the positive electrode material 51 is formed in a disk shape from a positive electrode mixture prepared by mixing manganese dioxide with graphite, a tetrafluoroethylene-hexafluoropropylene copolymer, and hydroxypropyl cellulose, and has a predetermined rigidity and It is held by a positive electrode ring 54 made of conductive stainless steel or the like.
- the positive electrode ring 54 includes a cylindrical portion 54a that contacts the side surface of the positive electrode material 51, and an annular flange portion 54b that extends inward from the cylindrical portion 54a from one end side of the cylindrical portion 54a and contacts the bottom surface of the positive electrode material 51. and are integrally formed.
- the positive electrode ring 54 having such a configuration can restrict deformation of the positive electrode material 51 in the positive electrode ring 54 in the radial direction and toward one end side. Since the other end of the cylindrical portion 54a of the positive electrode ring 54 is open, the positive electrode material 51 can freely expand. Therefore, even if the thickness of the negative electrode material 52 is reduced during discharge, the positive electrode material 51 expands along the positive electrode ring 54 toward the negative electrode material 52, thereby preventing separation between the positive electrode material 51 and the negative electrode material 52. can.
- the separator 53 is configured using a nonwoven fabric made from polybutylene terephthalate fibers. This separator 53 is impregnated with a non-aqueous electrolyte in the coin-type battery 1 .
- the non-aqueous electrolyte is, for example, a solution obtained by dissolving LiClO 4 in a mixed solution of propylene carbonate and 1,2-dimethoxyethane.
- the resin composition of the present embodiment is also preferably used to form molded articles other than gaskets for non-aqueous electrolyte batteries that require similar or similar performance.
- the molded article of this embodiment is formed from the resin composition of this embodiment.
- the method for producing the molded article is not particularly limited, and any molding method commonly used for resin compositions can be employed. Examples include injection molding, ultra-high speed injection molding, injection compression molding, two-color molding, hollow molding such as gas assist, molding using heat insulating molds, and rapid heating molds. Molding method, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method, press molding method, A blow molding method and the like can be mentioned. A molding method using a hot runner system can also be used.
- a general injection molding machine for plastic processing is used.
- an in-line screw type injection molding machine may be used in which a plasticizing section that heats and melts the material and a weighing section that accumulates the melted material for pouring into the mold are integrated, or the plasticizing section and the weighing section may be used. may be used.
- the mold clamping size of the injection molding machine it is necessary to have a mold clamping force that can secure the pressure at which the mold is closed and the mold does not open due to the pressure of the material injected from the weighing unit. If the mold clamping force is weak, the mold will open slightly and a molding defect called burr will occur. The generation of burrs is not preferable because the sealing performance of the battery is remarkably deteriorated.
- the mold used in this embodiment is selected from those constructed from commonly used mold structures.
- the mold consists of a fixed side and a movable side.
- On the fixed side there is a spool where the material melted from the plasticizing section of the injection molding machine is injected into the mold, a runner that is a flow path between the spool and the product section, and a gate that is the interface between the runner and the product section.
- the movable side is formed with a product portion and a protruding portion for facilitating removal of the product after the molten material has cooled and solidified in the product portion.
- the product part is preferably processed so that when the fixed mold part and the movable mold part are brought into close contact with each other, the fixed side product part and the movable side product part have the shape of a gasket.
- the melted resin composition flows from the spool and spreads to the product portion, then cools and solidifies, the movable mold portion separates from the fixed mold portion, and the projecting portion of the movable mold portion forms a metal mold. It is preferably molded by being extruded from a mold.
- the mold temperature is 60° C. or higher and 120° C. or lower.
- the mold temperature is 60° C. or higher and 120° C. or lower.
- the mold temperature is more preferably 80 to 120° C. in order to obtain a gasket with high long-term reliability of the battery.
- the runner part of the gasket mold of this embodiment is cooled and taken out together with the gasket cooling, the hot runner system maintains the molten state from the spool to the gate, and the molten state is maintained up to a part of the runner. It is selected from the semi-hot runner method. Unnecessary runners are generated when cold runner or semi-hot runner molds are used. If the runner is pulverized to a size similar to that of the pellets using a pulverizer, it can be reused by mixing with the pellets as a pulverized material to the extent that the physical properties required for the gasket can be maintained.
- the gate used for the gasket mold of this embodiment is a pin gate or a submarine gate that automatically disconnects the gate and the product portion when the movable mold portion opens, and the product portion and the runner when the movable mold portion opens.
- a gate system generally used in injection molding such as a side gate from which the part is taken out integrally, is preferably used. In the case of the side gate method, the transmission force is high because the melted material spreads all over the product, but on the other hand, the process of separating the product and the runner increases, so there may be cases where the gasket has an ultra-thin part. , suitable for materials with low fluidity.
- the gasket of this embodiment can be achieved by selecting a disk gate whose entire inner diameter portion is the gate portion. can be made. If side gates or disk gates must be selected, productivity can be improved by adding an in-mold gate cut structure to the movable mold portion.
- the gate position for producing the gasket of this embodiment is provided at a location other than the inner diameter wall portion, the outer diameter wall portion, and the bottom surface, which are the sealing portions of the battery.
- Raw material (a) PX100F Polyphenylene ether resin, polyxylenol Singapore (b-1) Novatec PPMH4 Polypropylene resin manufactured by Japan Polypropylene Co., Ltd., measured according to JISK7210, load 2.16 kg and temperature 230 ° C.
- MFR Melt flow rate
- b-2 (hereinafter the same for MFR) 5.0 g / 10 minutes (b-2) Novatec PPMA3Q Nippon Polypropylene Co., Ltd., polypropylene resin, MFR 11.0 g/10 minutes (b-3) Novatec PPFY6C Japan Polypropylene Co., Ltd., polypropylene resin, MFR 2.4 g/10 minutes (c-1) Septon 2104 Kuraray Co., Ltd., SEPS, styrene content 65% by mass, MFR 0.4 g / 10 minutes (c-2) Septon 2004F Kuraray Co., Ltd., SEPS, styrene content 18% by mass, MFR 5.0 g / 10 minutes (c-3) Tuftec H1041 Asahi Kasei Corporation, SEBS, styrene content 30% by mass, MFR 5.0 g / 10 minutes (c-4) Tuftec H1043 Asahi Kasei Corporation, SEBS,
- load deflection temperature at a load of 1.80 MPa (unit: ° C.) was measured.
- Nominal tensile strain change rate (%) [(Nominal tensile strain (%) at 150 ° C. - Nominal tensile strain (%) at 23 ° C.)] / Nominal tensile strain (%) at 23 ° C.] ⁇ 100
- Notched Charpy impact strength (kJ/m 2 )>
- the ISO test piece obtained above is cut in accordance with ISO-179-1 and ISO179-2, cut off the gripping parts at both ends, and notch (notch) in the center, notched Charpy impact A test piece was molded.
- the notched Charpy impact strength at 23 ° C. (unit: kJ / m 2 ) was measured in accordance with ISO-179-1 and ISO179-2 as impact resistance evaluation. .
- the resin composition of this embodiment had a high deflection temperature under load. Furthermore, the nominal tensile strain at room temperature and high temperature was high, and in particular, the nominal tensile strain at 150°C was higher than the nominal tensile strain at 23°C. Furthermore, various mechanical strengths were also excellent. Therefore, the resin composition of the present embodiment is preferably used for moldings such as gaskets for non-aqueous electrolyte batteries, which are required to have heat resistance and high toughness even when subjected to heat and load.
- a molded article having sufficient toughness can be obtained even when heat and load are applied. Therefore, according to the present embodiment, it is possible to obtain a gasket for a non-aqueous electrolyte battery that is excellent in heat resistance and mechanical properties while having good moldability. Non-aqueous electrolyte batteries need to be more strictly prevented from moisture intrusion than aqueous secondary batteries. A gasket for electrolyte batteries is obtained.
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Abstract
Description
また、ポリプロピレン樹脂とポリフェニレンエーテル樹脂を用いた樹脂組成物として、特許文献3に記載のものが知られている。
本発明はかかる課題を解決することを目的とするものであって、成形体に熱および荷重がかかっても、十分に対応できる靭性を有する成形体を提供可能な樹脂組成物および成形体を提供することを目的とする。
具体的には、下記手段により、上記課題は解決された。
<1>(a)ポリフェニレンエーテル樹脂50.0~80.0質量部と(b)ポリプロピレン樹脂50.0~20.0質量部の合計100質量部に対して、(c)ブロック共重合体を5.0~30.0質量部を含み、
前記(c)ブロック共重合体は、ビニル芳香族化合物ブロック(c1)とイソプレン重合体ブロック(c2)とを含む水素添加物であり、
前記(c)ブロック共重合体中のビニル芳香族化合物単位の含有量が50質量%以上80質量%未満である、樹脂組成物。
<2>前記樹脂組成物を、ISO3167:93A型試験片(4mm厚)に成形したときのISO-75-1に準じた荷重たわみ温度が100℃以上である、<1>に記載の樹脂組成物。
<3>前記樹脂組成物を、ISO3167:93A型試験片(4mm厚)に成形したときのISO-527-1に準じた23℃における引張り呼び歪X(%)と、ISO-527-1に準じた150℃における引張り呼び歪Y(%)がY≧Xを満たす、<1>または<2>に記載の樹脂組成物。
<4>前記ポリプロピレン樹脂(b)と前記ブロック共重合体(c)の質量比率((b)/(c))が1.0~5.0である、<1>~<3>のいずれか1つに記載の樹脂組成物。
<5>前記ポリプロピレン樹脂(b)は、JISK7210に準じて測定した、荷重2.16kgおよび温度230℃におけるメルトフローレイト(MFR)が8.0g/10分以下のポリプロピレン樹脂と、前記MFRが10.0g/10分以上のポリプロピレン樹脂とを含む、<1>~<4>のいずれか1つに記載の樹脂組成物。
<6>さらに、(d)重量平均分子量(Mw)が3,000~20,000であるポリスチレン樹脂を含む、<1>~<5>のいずれか1つに記載の樹脂組成物。
<7>前記イソプレン重合体ブロック(c2)が下記構成単位からなるブロックを含み、mは正の整数である、<1>~<6>のいずれか1つに記載の樹脂組成物。
式(c)
<10>非水電解液電池用ガスケット形成用である、<1>~<9>のいずれか1つに記載の樹脂組成物。
<11>リチウム電池向けガスケット形成用である、<1>~<9>のいずれか1つに記載の樹脂組成物。
<12><1>~<11>のいずれか1つに記載の樹脂組成物から形成された成形体。
なお、本明細書において「~」とはその前後に記載される数値を下限値および上限値として含む意味で使用される。
本明細書において、各種物性値および特性値は、特に述べない限り、23℃におけるものとする。
本明細書において、重量平均分子量は、特に述べない限り、GPC(ゲルパーミエーションクロマトグラフィ)法により測定したポリスチレン換算値である。
本明細書で示す規格が年度によって、測定方法等が異なる場合、特に述べない限り、2021年1月1日時点における規格に基づくものとする。
すなわち、(a)ポリフェニレンエーテル樹脂を主要成分として用いることにより、(a)ポリフェニレンエーテル樹脂が本来的に有している高い耐熱性や機械的強度を効果的に発揮させることができると推測される。また、(b)ポリプロピレン樹脂を配合することにより、延性が向上し、引張り呼び歪を高くすることができると推測される。さらに、(c)ブロック共重合体によって靭性と耐衝撃性を高くすることができると推測される。そして、(c)ブロック共重合体のビニル芳香族化合物ブロック(c1)部分が、(a)ポリフェニレンエーテル樹脂と相溶しやすいことから、(c)ブロック共重合体が(a)ポリフェニレンエーテル樹脂中に分散しやすくなり、剛直な(a)ポリフェニレンエーテル樹脂領域に靭性と耐衝撃性能を付与することができると推測される。加えて、イソプレン重合体ブロック(C2)はエチレンープロピレンの交互共重合構造をとるため、ポリプロピレンに対する相溶性にも優れると共に、理想的なゴム的な性質を示すと推測される。特に、上記(a)~(c)成分の配合比率と、(c)ブロック共重合体におけるビニル芳香族化合物単位の割合を精密に調整することにより、熱および荷重がかかっても、十分な靭性を有する成形体を提供可能な樹脂組成物が提供できたと推測される。
以下、本実施形態の詳細を説明する。
本実施形態の樹脂組成物は、ポリフェニレンエーテル樹脂を含む。ポリフェニレンエーテル樹脂を含むことにより、ポリフェニレンエーテル樹脂が本来的に有する高い耐熱性や機械的強度を有する成形体が得られる。
本実施形態の樹脂組成物に用いられる(a)ポリフェニレンエーテル樹脂は、公知のポリフェニレンエーテル樹脂を用いることができ、例えば、下記式で表される構成単位を主鎖に有する重合体が例示される。(a)ポリフェニレンエーテル樹脂は、単独重合体または共重合体のいずれであってもよい。
本実施形態において、(a)ポリフェニレンエーテル樹脂は1種を単独で用いてもよく、2種以上を混合して用いてもよい。2種以上含む場合は、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、(b)ポリプロピレン樹脂を含む。ポリプロピレン樹脂を含むことにより、得られる成形体の延性を向上させることができる。
本実施形態で用いる(b)ポリプロピレン樹脂は、プロピレンホモポリマーであるか、プロピレンと他のα-オレフィン(例えば、エチレン、ブテン-1、ヘキセン-1等)を共重合して得られる共重合体(ただし、プロピレンの割合が50質量%超であり、80質量%以上であることが好ましい)であることが好ましく、プロピレンホモポリマーがより好ましい。
(b)ポリプロピレン樹脂の詳細は、特許第5797710号公報の段落0045~0050の記載、特許2966526号のポリプロピレン樹脂の記載、特開2002-060562号公報の段落0014~0017の記載を参酌でき、これらの内容は本明細書に組み込まれる。
前記MFRが8.0g/10分以下のポリプロピレン樹脂のMFRは、2.0g/10分以上であることが好ましく、4.0g/10分以上であることがより好ましく、また、7.0g/10分以下であることが好ましく、6.5g/10分以下であることがより好ましい。また、前記MFRが10.0g/10分以上のポリプロピレン樹脂のMFRは、11.0g/10分以上であることが好ましく、11.5g/10分以上であることがより好ましく、また、22.0g/10分以下であることが好ましく、16.0g/10分以下であることがより好ましい。さらに、前記MFRが8.0g/10分以下のポリプロピレン樹脂と前記MFRが10.0g/10分以上のMFRの差は、2.0g/10分以上であることが好ましく、4.0g/10分以上であることがより好ましく、また、10.0g/10分以下であることが好ましく、8.0g/10分以下であることがより好ましい。このような範囲とすることにより、成形性と引張呼び歪を共に高い水準で示す樹脂組成物となる傾向にある。
前記MFRが8.0g/10分以下のポリプロピレン樹脂と前記MFRが10.0g/10分以上のポリプロピレン樹脂の質量比率は、1:1~5:1であることが好ましく、1.5:1~4:1であることがより好ましく、2:1~4:1であることがさらに好ましい。
なお、本実施形態においては、ポリプロピレン樹脂が1種のみでもよく、ポリプロピレン樹脂が1種の場合、前記MFRが2.0~16.0g/10分以下のポリプロピレン樹脂を用いることが好ましい。
本実施形態の樹脂組成物は、(c)ブロック共重合体を(a)ポリフェニレンエーテル樹脂と(b)ポリプロピレン樹脂の合計100質量部に対して、5.0~30.0質量部の割合で含む。(c)ブロック共重合体は、ビニル芳香族化合物ブロック(c1)とイソプレン重合体ブロック(c2)とを含む水素添加物であり、(c)ブロック共重合体中のビニル芳香族化合物単位の含有量が50質量%以上80質量%未満である。このような構成とすることにより、得られる成形体が高温下に晒されても、引張り呼び歪を高くすることができる。
(c)ブロック共重合体は、ビニル芳香族化合物ブロック(c1)を含む。ビニル芳香族化合物ブロック(c1)は、(a)ポリフェニレンエーテル樹脂との相溶性に優れるため、(c)ブロック共重合体の(a)ポリフェニレンエーテル樹脂中への分散性を向上させることができ、樹脂組成物全体ないし樹脂組成物から得られる成形体の靭性と耐衝撃性を向上させることができる。また、樹脂組成物にエラストマー成分を配合すると、耐熱性が低下する傾向にあるが、本実施形態で用いる(c)ブロック共重合体は、ビニル芳香族化合物ブロック(c1)を主成分とするため、樹脂組成物の耐熱性の低下を効果的に抑制できる。
ビニル芳香族化合物としては、ビニル基と芳香環基を有する化合物であり、CH2=CH-L1-Ar1で表される化合物であることが好ましい。ここで、L1は単結合または2価の連結基であり、単結合または式量14~100の2価の連結基であることが好ましく、単結合または式量14~50の2価の連結基であることがより好ましく、単結合であることがさらに好ましい。L1が2価の連結基の場合、脂肪族炭化水素基または、脂肪族炭化水素基と-O-との組み合わせからなる基であることが好ましい。ここで、式量とは、芳香族ビニル化合物のL1に相当する部分の1モル当たりの質量(g)を意味する。Ar1は芳香環基であり、置換または無置換の、ベンゼン環基またはナフタレン環(好ましくはベンゼン環)であることが好ましく、無置換のベンゼン環基であることがさらに好ましい。
芳香族ビニル化合物としては、スチレン、α-メチルスチレン、o-メチルスチレン、p-メチルスチレン、ビニルキシレン、エチルスチレン、ジメチルスチレン、p-tert-ブチルスチレン、ビニルナフタレン、メトキシスチレン、モノブロモスチレン、ジブロモスチレン、フルオロスチレン、トリブロモスチレン等に由来するスチレン系モノマー(スチレン誘導体)が挙げられ、特にスチレンが好ましい。
イソプレン重合体ブロック(c2)は、イソプレン単位を主成分とするものであり、イソプレン重合体ブロック(c2)の好ましくは90質量%以上が、より好ましくは95質量%以上が、さらに好ましくは98質量%以上がイソプレン単位である。
ここで、ビニル芳香族化合物単位とは、ビニル芳香族化合物ブロック(c1)に含まれるビニル芳香族化合物単位に限られず、(c)ブロック共重合体のいずれかの位置に含まれるビニル芳香族化合物単位を含む趣旨である。
本実施形態で用いる(c)ブロック共重合体は、また、イソプレン重合体ブロック(c2)が下記構成単位からなるブロックを含み、mは正の整数であることも好ましい。
(c)ブロック共重合体の具体例としては、スチレン/イソプレン共重合体水素添加物(SEP)、スチレン/イソプレン/スチレン共重合体水素添加物(SEPS)、スチレン/イソプレン/ブチレン/スチレン共重合体水素添加物(SEEPS)が好ましく、スチレン/イソプレン/スチレン共重合体水素添加物(SEPS)がより好ましい。
より具体的には、(c)ブロック共重合体は、下記式(c)で表される構造を含むことが好ましく、下記式(c)で表される構造が全体の80質量%以上を占めることが好ましく、85質量%以上を占めることがより好ましく、90質量%以上を占めることがさらに好ましく、95質量%以上を占めることが一層好ましく、97質量%以上を占めることがより一層好ましく、98質量%以上を占めることがさらに一層好ましく、99質量%以上を占めることが特に一層好ましい。
式(c)
本実施形態の樹脂組成物は、(a)ポリフェニレンエーテル樹脂50.0~80.0質量部と(b)ポリプロピレン樹脂50.0~20.0質量部の合計100質量部に対して、(c)ブロック共重合体を5.0~30.0質量部を含む。
本実施形態の樹脂組成物は、(a)ポリフェニレンエーテル樹脂、(b)ポリプロピレン樹脂、および、(c)ブロック共重合体を、それぞれ、1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、さらに、(d)重量平均分子量(Mw)が3,000~20,000であるポリスチレン樹脂(以下、「(d)低分子量ポリスチレン」ということがある)を含んでいてもよい。(d)低分子量ポリスチレンを含むことにより、得られる成形体の引張り呼び歪をより高くできると共に、耐衝撃性をより向上させることができる。
(d)低分子量ポリスチレンは、スチレン単位を主成分とするものであることが好ましく、スチレン単位が80質量%以上を占めることがより好ましく、スチレン単位が90質量%以上を占めることがさらに好ましい。
(d)低分子量ポリスチレンは、その重量平均分子量(Mw)が3,000以上であり、5,000以上であることが好ましく、8,000以上であることがさらに好ましい。前記下限値以下では、樹脂組成物全体の引張、曲げ特性といった機械特性が低下する傾向にある。また、(d)低分子量ポリスチレンの重量平均分子量(Mw)は、20,000以下であることが好ましく、15,000以下であることがより好ましく、12,000以下であることがさらに好ましい。前記上限値以下とすることにより、ポリフェニレンエーテル樹脂の流動性を高め、ポリフェニレンエーテルドメインの分散性が改善し、得られる成形体の靭性と耐衝撃性が向上する傾向にある。
本実施形態の樹脂組成物は、(d)低分子量ポリスチレンを1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、熱安定剤や酸化防止剤等の安定剤を含んでいてもよい。
安定剤としては、フェノール系安定剤、アミン系安定剤、リン系安定剤、チオエーテル系安定剤などが挙げられる。中でも本発明においては、リン系安定剤およびフェノール系安定剤が好ましい。
リン系安定剤としては、公知の任意のものを使用できる。具体例を挙げると、リン酸、ホスホン酸、亜リン酸、ホスフィン酸、ポリリン酸などのリンのオキソ酸;酸性ピロリン酸ナトリウム、酸性ピロリン酸カリウム、酸性ピロリン酸カルシウムなどの酸性ピロリン酸金属塩;リン酸カリウム、リン酸ナトリウム、リン酸セシウム、リン酸亜鉛など第1族または第2B族金属のリン酸塩;有機ホスフェート化合物、有機ホスファイト化合物、有機ホスホナイト化合物などが挙げられるが、有機ホスホナイト化合物が特に好ましい。
本実施形態の樹脂組成物は、安定剤を1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、着色剤を含んでいてもよい。着色剤を含むことにより、得られる成形体に色味を持たせることができ、意匠性が向上する傾向にある。
着色剤としては、顔料であっても染料であってもよいが、顔料であることが好ましい。
顔料は、無機顔料(カーボンブラックなどの黒色顔料、酸化鉄赤などの赤色顔料、モリブデートオレンジなどの橙色顔料、酸化チタンなどの白色顔料)、有機顔料(黄色顔料、橙色顔料、赤色顔料、青色顔料、緑色顔料など)などが挙げられ、無機顔料が好ましく、白色顔料がより好ましく、酸化チタンがさらに好ましい。
着色剤を本実施形態の樹脂組成物に配合する場合、マスターバッチ化して配合してもよい。
本実施形態における樹脂組成物が着色剤を含む場合、その含有量は、樹脂組成物100質量部に対し、0.01質量部以上であることが好ましく、0.1質量部以上であることがより好ましく、0.5質量部以上であることがさらに好ましい。また、前記着色剤の含有量は、樹脂組成物100質量部に対し、10.0質量部以下であることが好ましく、5.0質量部以下であることがより好ましく、3.0質量部以下であることがさらに好ましい。
本実施形態の樹脂組成物は、着色剤を1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、上記以外の他の成分を含んでいてもよい。
具体的には、ポリアミド樹脂、ポリエステル樹脂、ポリフェニレンサルファイド樹脂、液晶ポリエステル樹脂、ポリカーボネート樹脂、ポリアセタール樹脂、ポリアクリロニトリル樹脂、アクリル樹脂、ポリエチレン樹脂等の熱可塑性樹脂や、エポキシ樹脂、メラミン樹脂、シリコーン樹脂等の熱硬化性樹脂等が挙げられる。これらの熱可塑性樹脂および熱硬化性樹脂は、2種以上を組み合わせて使用することもできる。
また、本実施形態の樹脂組成物は、樹脂添加剤を含んでいてもよい。具体的には、難燃剤(リン系難燃剤、ハロゲン系難燃剤、有機金属系難燃剤等)、内部潤滑剤(脂肪酸金属塩、ポリエチレンワックス等)、熱安定剤(酸化亜鉛等)、染料、離型剤(シリコーンオイル、脂肪酸、脂肪酸エステル等)、耐候性改良剤、増核剤、耐衝撃改良剤、可塑剤、流動性改良剤等を含んでいてもよい。これらの成分を含有する場合、その含有量は、合計で、樹脂組成物の0.01~5質量%の範囲とすることが好ましい。
本実施形態の樹脂組成物は、さらに、(a)ポリフェニレンエーテル樹脂、(b)ポリプロピレン樹脂、(c)ブロック共重合体、および、(d)低分子量ポリスチレンの合計が、樹脂組成物の96質量%以上を占めることが好ましく、98質量%以上を占めることがより好ましく、99質量%以上を占めることがさらに好ましい。
本実施形態の樹脂組成物の製造方法としては、任意の方法が採用される。
例えば、(a)ポリフェニレンエーテル樹脂、(b)ポリプロピレン樹脂、(c)ブロック共重合体等の各成分をV型ブレンダー等の混合手段を用いて混合し、一括ブレンド品を調製した後、ベント付き押出機で溶融混練してペレット化する方法が挙げられる。あるいは、二段階練込法として、予め、一部の成分を、十分混合後、ベント付き押出機で溶融混練りしてペレットを製造した後、そのペレットと他の成分を混合し、ベント付き押出機で溶融混練する方法が挙げられる。
本実施形態の樹脂組成物は、特に以下の特性を満たすものとすることができる。
本実施形態の樹脂組成物は、ISO3167:93A型試験片に成形したときのISO-75-1に準じた荷重たわみ温度(DTUL)が100℃以上であることが好ましく、101℃以上であることが好ましい。前記荷重たわみ温度の上限は、特に定めるものではないが、120℃以下が実際的であり、108℃以下であってもよい。
本実施形態の樹脂組成物は、ISO3167:93A型試験片に成形したときのISO-527-1に準じた23℃における引張り呼び歪X(%)が、10.0%以上であることが好ましく、15.0%以上であることがより好ましく、20.0%以上であってもよく、さらには25.0%以上、特には30.0%以上であってもよい。また、ISO-527-1に準じた23℃における引張り呼び歪X(%)の上限は、70.0%以下が実際的であり、50.0%以下であっても十分に要求性能を満たすものである。
本実施形態の樹脂組成物は、ISO3167:93A型試験片に成形したときのISO-527-1に準じた150℃における引張り呼び歪Y(%)が、10.0%以上であることが好ましく、15.0%以上であることがより好ましく、20.0%以上であってもよく、さらには45.0%以上、特には50.0%以上であってもよい。また、ISO-527-1に準じた150℃における引張り呼び歪Y(%)の上限は、90.0%以下が実際的であり、70.0%以下であっても十分に要求性能を満たすものである。
さらに、本実施形態の樹脂組成物は、ISO3167:93A型試験片に成形したときのISO-527-1に準じた23℃における引張り呼び歪X(%)と、ISO-527-1準じた150℃における引張り呼び歪Y(%)がY≧Xを満たすことが好ましい。Y≧Xとすることにより、樹脂組成物から得られる成形体が高温下に晒されても、折れたりせず、応力に追従して形状が変化しうるため、ガスケットに使用しても電解液の漏れなどを効果的に抑制できる。
本実施形態では、Y-Xは0%超であることが好ましく、1%以上であることがより好ましく、2%以上であることがさらに好ましく、40%以上であってもよく、さらには50%以上、特には60%以上であってもよい。また、Y-Xは95%以下が実際的である。
荷重たわみ温度および引張り呼び歪は、後述する実施例に記載の方法に従って測定される。
本実施形態の樹脂組成物は、ポリフェニレンエーテル樹脂、特に、ポリフェニレンエーテル樹脂とスチレン系エラストマーのブレンド物が一般的に用いられる用途に広く用いられる。
例えば、自動車外装・外板部品、自動車内装部品、自動車アンダーフード部品が挙げられる。具体的には、バンパー、フェンダー、ドアパネル、モール、エンブレム、エンジンフード、ホイルカバー、ルーフ、スポイラー、エンジンカバー等の外装・外板部品、アンダーフード部品や、インストゥルメントパネル、コンソールボックストリム等の内装部品等に適している。
また、各種コンピューターおよびその周辺機器、その他のOA機器、テレビ、ビデオ、各種ディスクプレーヤー等のキャビネット、シャーシ、冷蔵庫、エアコン、液晶プロジェクター等としても用いることができる。
さらに、金属導体または光ファイバーに被覆して得られる電線・ケーブルの被覆材、固体メタノール電池用燃料ケース、二次電池電槽、燃料電池配水管、水冷用タンク、ボイラー外装ケース、インクジェットプリンターのインク周辺部品・部材およびシャーシ、および水配管、継ぎ手などの成形体、シート・フィルムを延伸して得られるリチウムイオン電池用セパレータとして利用できる。
図1に示すように、コイン型電池1は、側壁21を有する有底円筒状の正極缶となる外装缶2と、該外装缶2の開口を覆い、外装缶2の内方に配置される負極缶となる逆皿状の封口板3と、外装缶2の側壁21と封口板3の筒部31との間に配置されるガスケット4と、外装缶2および封口板3の間に形成される空間内に収納される発電要素5とを備えている。コイン型電池1は、外装缶2と封口板3とを嵌め合わすことによって、全体が扁平なコイン状に形成される。コイン型電池1の外装缶2と封口板3との間に形成される空間内には、発電要素5以外に、非水電解液(図示省略)も封入されている。
本実施形態における、成形体の製造方法は、特に限定されず、樹脂組成物について一般に採用されている成形法を任意に採用できる。その例を挙げると、射出成形法、超高速射出成形法、射出圧縮成形法、二色成形法、ガスアシスト等の中空成形法、断熱金型を使用した成形法、急速加熱金型を使用した成形法、発泡成形(超臨界流体も含む)、インサート成形、IMC(インモールドコーティング成形)成形法、押出成形法、シート成形法、熱成形法、回転成形法、積層成形法、プレス成形法、ブロー成形法などが挙げられる。また、ホットランナー方式を使用した成形法を用いることもできる。
実施例で用いた測定機器等が廃番等により入手困難な場合、他の同等の性能を有する機器を用いて測定することができる。
(a)PX100F
ポリフェニレンエーテル樹脂、ポリキシレノールシンガポール社製
(b-1)ノバテックPPMH4
日本ポリプロ社製、ポリプロピレン樹脂、JISK7210に準じて測定した、荷重2.16kgおよび温度230℃メルトフローレイト(MFR)(以下、MFRについて同じ)5.0g/10分
(b-2)ノバテックPPMA3Q
日本ポリプロ社製、ポリプロピレン樹脂、MFR11.0g/10分
(b-3)ノバテックPPFY6C
日本ポリプロ社製、ポリプロピレン樹脂、MFR2.4g/10分
(c-1)セプトン2104
クラレ社製、SEPS、スチレン含有量65質量%、MFR0.4g/10分
(c-2)セプトン2004F
クラレ社製、SEPS、スチレン含有量18質量%、MFR5.0g/10分
(c-3)タフテックH1041
旭化成社製、SEBS、スチレン含有量30質量%、MFR5.0g/10分
(c-4)タフテックH1043
旭化成社製、SEBS、スチレン含有量67質量%、MFR2.0g/10分
(d)HMST120
三洋化成製、ハイマーST120、低分子量ポリスチレン、重量平均分子量10,000、ガラス転移温度42℃
(e-1)PEPQ
リン系安定剤、HOSTANOX P-EPQ、クラリアントケミカルズ社製
(e-2)IRG1010
ヒンダードフェノール系安定剤、Irganox 1010、BASF社製
(f)RTC30
酸化チタン、Tioxide社製、TIOXIDE RTC 30
下記表1~表3に示す割合(質量基準)で各成分を混合し、二軸押出機(芝浦機械社製:TEM18SS)を用いて、シリンダー温度250℃、スクリュー回転数400rpmで溶融混練を行い、樹脂組成物(ペレット)を得た。
得られた樹脂組成物(ペレット)を用いて、下記評価を行った。結果を表1~表3に示した。
上記の製造方法で得られたペレットを80℃で2時間乾燥させた後、射出成形機(芝浦機械社製、「EC75SX」)にて、シリンダー温度270℃、金型温度70℃の条件で、ISO-15103に準じて、ISO3167:93A型試験片(以下、「ISO試験片という」)を射出成形した。
ISO-75-1に準じて、上記ISO試験片の平行部を機械加工して作製した80mm×10mm×4mmtの短冊形状試験片を用いて、荷重1.80MPaにおける荷重たわみ温度(単位:℃)を測定した。
ISO-527に準拠して、上記で得られたISO試験片を用いて、23℃および150℃における引張り呼び歪を測定した。単位は、%で示した。
また、23℃における引張り呼び歪に対する、150℃における引張り呼び歪の変化率を以下の式に従い算出した。
引張り呼び歪変化率(%)=[(150℃における引張り呼び歪(%)-23℃における引張り呼び歪(%))]/23℃における引張り呼び歪(%)]×100
ISO-527に準じて、上記で得られたISO試験片を用いて、引張強さを測定した。
上記ISO試験片の平行部を機械加工して作製した80mm×10mm×4mmtの短冊形状試験片を用いて、ISO-178に準拠して、温度23℃、湿度50%の環境下で曲げ強さ(単位:MPa)および曲げ弾性率(単位:MPa)を測定した。
上記で得られたISO試験片を、ISO-179-1およびISO179-2に準拠して、切削加工し両端のつかみ部分を切り取ると共に、中央にノッチ(切り欠き)を付けて、ノッチ付シャルピー衝撃試験片を成形した。得られたノッチ付シャルピー衝撃試験片について、耐衝撃性評価として、ISO-179-1およびISO179-2に準拠し、23℃におけるノッチ付シャルピー衝撃強さ(単位:kJ/m2)を測定した。
2 外装缶
3 封口板
4 ガスケット
5 発電要素
21 側壁
22 底面部
31 筒部
31a 基端部
31b 段部
31c 開放部
32 平面部
41 外側シール部
42 底部シール部
43 環状凹部
44 環状リブ
51 正極材
52 負極材
53 セパレータ
54 正極リング
54a 円筒部
54b フランジ部
Claims (12)
- (a)ポリフェニレンエーテル樹脂50.0~80.0質量部と(b)ポリプロピレン樹脂50.0~20.0質量部の合計100質量部に対して、(c)ブロック共重合体を5.0~30.0質量部を含み、
前記(c)ブロック共重合体は、ビニル芳香族化合物ブロック(c1)とイソプレン重合体ブロック(c2)とを含む水素添加物であり、
前記(c)ブロック共重合体中のビニル芳香族化合物単位の含有量が50質量%以上80質量%未満である、樹脂組成物。 - 前記樹脂組成物を、ISO3167:93A型試験片(4mm厚)に成形したときのISO-75-1に準じた荷重たわみ温度が100℃以上である、請求項1に記載の樹脂組成物。
- 前記樹脂組成物を、ISO3167:93A型試験片(4mm厚)に成形したときのISO-527-1に準じた23℃における引張り呼び歪X(%)と、ISO-527-1に準じた150℃における引張り呼び歪Y(%)がY≧Xを満たす、請求項1または2に記載の樹脂組成物。
- 前記ポリプロピレン樹脂(b)と前記ブロック共重合体(c)の質量比率((b)/(c))が1.0~5.0である、請求項1~3のいずれか1項に記載の樹脂組成物。
- 前記ポリプロピレン樹脂(b)は、JISK7210に準じて測定した、荷重2.16kgおよび温度230℃におけるメルトフローレイト(MFR)が8.0g/10分以下のポリプロピレン樹脂と、前記MFRが10.0g/10分以上のポリプロピレン樹脂とを含む、請求項1~4のいずれか1項に記載の樹脂組成物。
- さらに、(d)重量平均分子量(Mw)が3,000~20,000であるポリスチレン樹脂を含む、請求項1~5のいずれか1項に記載の樹脂組成物。
- 非水電解液電池用ガスケット形成用である、請求項1~9のいずれか1項に記載の樹脂組成物。
- リチウム電池向けガスケット形成用である、請求項1~9のいずれか1項に記載の樹脂組成物。
- 請求項1~11のいずれか1項に記載の樹脂組成物から形成された成形体。
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| KR1020237034128A KR20230163430A (ko) | 2021-03-31 | 2022-03-25 | 수지 조성물 및 성형체 |
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| PCT/JP2022/014321 Ceased WO2022210337A1 (ja) | 2021-03-31 | 2022-03-25 | 非水電解液電池用ガスケットおよびその製造方法 |
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| JP2000058007A (ja) * | 1998-08-03 | 2000-02-25 | Mitsubishi Engineering Plastics Corp | 密閉型二次電池用電槽 |
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| JP2000156210A (ja) | 1998-11-18 | 2000-06-06 | Toray Ind Inc | 電池用ガスケットおよびその製造方法 |
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| JP5078418B2 (ja) | 2007-04-20 | 2012-11-21 | 旭化成ケミカルズ株式会社 | 電池ケース |
| JP6228134B2 (ja) | 2012-12-27 | 2017-11-08 | ポリプラスチックス株式会社 | ガスケット用樹脂組成物及び二次電池用ガスケット |
| JP2019016477A (ja) | 2017-07-05 | 2019-01-31 | 新生化学工業株式会社 | リチウム電池用ガスケット |
| JP2021163578A (ja) | 2020-03-31 | 2021-10-11 | マクセルホールディングス株式会社 | ボタン形アルカリ電池 |
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- 2022-03-25 KR KR1020237034128A patent/KR20230163430A/ko active Pending
- 2022-03-25 US US18/281,319 patent/US20240166868A1/en active Pending
- 2022-03-25 WO PCT/JP2022/014241 patent/WO2022210323A1/ja not_active Ceased
- 2022-03-25 JP JP2022049306A patent/JP7190721B2/ja active Active
- 2022-03-25 WO PCT/JP2022/014321 patent/WO2022210337A1/ja not_active Ceased
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| JPH02103246A (ja) * | 1988-10-12 | 1990-04-16 | Mitsubishi Petrochem Co Ltd | 樹脂組成物 |
| JPH1171466A (ja) * | 1997-08-28 | 1999-03-16 | Asahi Chem Ind Co Ltd | 樹脂組成物の製造方法 |
| JP2000058007A (ja) * | 1998-08-03 | 2000-02-25 | Mitsubishi Engineering Plastics Corp | 密閉型二次電池用電槽 |
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| EP4317302A4 (en) | 2024-09-18 |
| KR20230163430A (ko) | 2023-11-30 |
| JPWO2022210323A1 (ja) | 2022-10-06 |
| JP7190721B2 (ja) | 2022-12-16 |
| WO2022210337A1 (ja) | 2022-10-06 |
| EP4317302A1 (en) | 2024-02-07 |
| JP2022159068A (ja) | 2022-10-17 |
| US20240166868A1 (en) | 2024-05-23 |
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