Polyphenylene ether resin composition and molded article

Abstract

A polyphenylene ether resin composition according to an embodiment of the present invention contains 2-20 parts by mass of a polypropylene homopolymer (c) and 1-25 parts by mass of an inorganic filling material (d) with respect to 100 parts by mass of a polyphenylene ether-containing resin (A) that contains a polyphenylene ether resin (a), or contains the polyphenylene ether resin (a) and a styrene resin (b).

Description

[Technical field]

[0001] The present invention relates to a polyphenylene ether resin composition and a molded article. [Background technology]

[0002] Polyphenylene ether resins are resins that have excellent properties such as heat resistance, flame retardancy, electrical properties, dimensional stability, etc., as well as low specific gravity, hydrolysis resistance, etc. In addition, polyphenylene ether resins can be blended with various resins such as styrene resins to improve their moldability and impact resistance.

[0003] Polyphenylene ether-based resin compositions containing such polyphenylene ether-based resins and the like have been widely used in the past as materials for various applications such as electrical parts, parts for electronic devices, and parts for vehicles. Various properties are required of the polyphenylene ether-based resin composition depending on the application. For example, when the polyphenylene ether-based resin composition is used as a material for a protective housing for protecting a battery unit including a battery pack or the like, the polyphenylene ether-based resin composition is required to have high tracking resistance in addition to the mechanical strength and heat resistance required for the protective housing of the battery unit.

[0004] For example, Patent Document 1 discloses a polyphenylene ether resin composition having high tracking resistance, which contains a polyphenylene ether resin and at least one of a hydrogenated block copolymer having a specific structure and a modified product of the hydrogenated block copolymer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-137742 A Summary of the Invention [Problem to be solved by the invention]

[0006] Depending on the application of the polyphenylene ether resin composition, high mechanical strength may be required. In general, the mechanical strength of the polyphenylene ether resin composition can be enhanced by adding a filler such as glass fiber.

[0007] However, in the conventional polyphenylene ether resin composition exemplified in the above-mentioned Patent Document 1, when a filler such as glass fiber is added, the mechanical strength is strengthened, but the tracking resistance is significantly reduced, which is a problem. That is, in the conventional polyphenylene ether resin composition, it is difficult to achieve both high mechanical strength and high tracking resistance required for applications such as protective housings for battery units.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a polyphenylene ether resin composition and a molded article thereof which are capable of achieving both high mechanical strength and high tracking resistance. [Means for solving the problem]

[0009] Means for Solving the Problems The present inventors have conducted intensive research to solve the above problems and have found that a polyphenylene ether-based resin composition which is capable of achieving both high mechanical strength and high tracking resistance can be obtained by blending an inorganic filler and a polypropylene homopolymer in a specific ratio with a resin component containing a polyphenylene ether-based resin, or a resin component containing a polyphenylene ether-based resin and a styrene-based resin, thereby completing the present invention.

[0010] That is, in order to solve the above-mentioned problems and achieve the object, the polyphenylene ether-based resin composition according to the present invention is characterized in that it contains 2 to 20 parts by mass of a polypropylene homopolymer (c) and 1 to 25 parts by mass of an inorganic filler (d) per 100 parts by mass of a polyphenylene ether-containing resin (A) containing a polyphenylene ether-based resin (a) or the polyphenylene ether-based resin (a) and a styrene-based resin (b).

[0011] Moreover, the polyphenylene ether resin composition according to the present invention is characterized in that, in the above invention, a mass ratio of the inorganic filler (d) to the polypropylene homopolymer (c) is 0.5 to 3.0.

[0012] The polyphenylene ether resin composition according to the present invention is characterized in that the polypropylene homopolymer (c) has a melt flow rate, measured in accordance with JIS K7210, of 3 to 40 g / 10 min under measurement conditions of a temperature of 230° C. and a load of 2.16 kg.

[0013] In addition, the polyphenylene ether resin composition according to the present invention, in the above invention, is characterized in that it further contains 5 to 35 parts by mass of a flame retardant (e) per 100 parts by mass of the polyphenylene ether-containing resin (A).

[0014] The polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the flame retardant (e) is a phosphate ester flame retardant.

[0015] In addition, the polyphenylene ether resin composition according to the present invention, in the above invention, is characterized in that it further contains 0.5 to 50 parts by mass of a flame retardant auxiliary (f) relative to 100 parts by mass of the polyphenylene ether-containing resin (A).

[0016] In addition, the polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the flame retardant auxiliary (f) contains at least one selected from the group consisting of alkaline earth metal salts, metal hydroxides, nitrogen-containing compounds, inorganic acid metal compounds, and layered double hydroxides.

[0017] The polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the flame retardant auxiliary (f) is calcium carbonate.

[0018] Moreover, the polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the inorganic filler (d) is at least one selected from glass fiber, mica, and talc.

[0019] The polyphenylene ether resin composition according to the present invention is characterized in that, in 100 mass% of the polyphenylene ether-containing resin (A), the content of the polyphenylene ether resin (a) is 55 to 100 mass%, and the content of the styrene resin (b) is 0 to 45 mass%.

[0020] The polyphenylene ether resin composition according to the present invention is characterized in that, in 100 mass% of the polyphenylene ether-containing resin (A), the content of the polyphenylene ether resin (a) is 90 to 100 mass%, and the content of the styrene resin (b) is 0 to 10 mass%.

[0021] In addition, the polyphenylene ether resin composition according to the present invention, in the above invention, is characterized in that it further contains 0.1 to 20 parts by mass of a phosphorus-based stabilizer (g) relative to 100 parts by mass of the polyphenylene ether-containing resin (A).

[0022] The polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the phosphorus-based stabilizer (g) contains at least one of a phosphite-based compound and a phosphonite-based compound.

[0023] In addition, the polyphenylene ether resin composition according to the present invention, in the above invention, is characterized in that it further contains 0.01 to 2.0 parts by mass of a black pigment (h) relative to 100 parts by mass of the polyphenylene ether-containing resin (A).

[0024] The polyphenylene ether resin composition according to the present invention is characterized in that, in the above-mentioned invention, the CTI value measured in accordance with IEC 60112 is 400 V or more, and the tensile strength measured in accordance with ISO 527 is 60 MPa or more.

[0025] A molded article according to the present invention is characterized in that it is made of the polyphenylene ether resin composition according to any one of the above aspects of the present invention.

[0026] The molded article according to the present invention is characterized in that, in the above invention, it is a battery unit casing. Effect of the Invention

[0027] ADVANTAGEOUS EFFECT OF THE PRESENT DISCLOSURE According to the present invention, there is an effect of providing a polyphenylene ether resin composition and a molded article which are capable of achieving both high mechanical strength and high tracking resistance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Preferred embodiments of the polyphenylene ether resin composition and molded article according to the present invention will be described in detail below. The present invention is not limited to the embodiments shown below. In addition, in this specification, the notation "~" is used to mean that the numerical values ​​before and after it are included as the lower limit and upper limit unless otherwise specified.

[0029] [Polyphenylene ether resin composition] The polyphenylene ether resin composition according to an embodiment of the present invention (hereinafter referred to as PPE resin composition (Z)) is a resin composition containing 2 to 20 parts by mass of a polypropylene homopolymer (c) and 1 to 25 parts by mass of an inorganic filler (d) per 100 parts by mass of a polyphenylene ether-containing resin (A) containing a polyphenylene ether resin (a) or containing a polyphenylene ether resin (a) and a styrene resin (b). Each component constituting the PPE resin composition (Z) and a molded article made of the PPE resin composition (Z) will be described in detail below.

[0030] [Polyphenylene ether-containing resin] First, the polyphenylene ether-containing resin (A), which is one component constituting the PPE-based resin composition (Z) according to the embodiment of the present invention, will be described in detail. The polyphenylene ether-containing resin (A) is a resin containing at least a polyphenylene ether-based resin (a). For example, the polyphenylene ether-containing resin (A) may be one containing only the polyphenylene ether-based resin (a), or one containing the polyphenylene ether-based resin (a) and the styrene-based resin (b) (i.e., modified polyphenylene ether-based resin). The modified polyphenylene ether-based resin (hereinafter referred to as modified PPE-based resin) contains the polyphenylene ether-based resin (a) as the main component, and further contains a styrene-based resin (b). The modified PPE-based resin may contain other resin components in addition to the polyphenylene ether-based resin (a) and the styrene-based resin (b) as necessary. The polyphenylene ether-containing resin (A) may contain the polyphenylene ether-based resin (a) as a main component, and may further contain resin components other than the polyphenylene ether-based resin (a) and the styrene-based resin (b).

[0031] The term "major component" as used herein refers to the component that is contained in the largest amount among the target components, i.e., the content of polyphenylene ether-based resin (a) in 100% by mass of polyphenylene ether-containing resin (A) exceeds 50% by mass.

[0032] [Polyphenylene ether resin (a)] Next, the polyphenylene ether resin (a) according to the embodiment of the present invention will be described in detail. The polyphenylene ether resin (a) is a resin component used in the PPE resin composition (Z) according to the embodiment of the present invention, and is contained in the PPE resin composition (Z) as the main component of the polyphenylene ether-containing resin (A). For example, the polyphenylene ether resin (a) is a polymer having a structural unit represented by the following general formula (1) in the main chain. The polyphenylene ether resin (a) may be a homopolymer or a copolymer.

[0033] [ka]

[0034] In the general formula (1), two R a each independently represents a hydrogen atom, a halogen atom, a primary alkyl group, a secondary alkyl group, an aryl group, an aminoalkyl group, a haloalkyl group, a hydrocarbyloxy group, or a halohydrocarbyloxy group. a cannot both be hydrogen atoms. b each independently represents a hydrogen atom, a halogen atom, a primary alkyl group, a secondary alkyl group, an aryl group, a haloalkyl group, a hydrocarbyloxy group, or a halohydrocarbyloxy group.

[0035] R a and R b is preferably a hydrogen atom, a primary alkyl group, a secondary alkyl group, or an aryl group. Suitable examples of the primary alkyl group include, for example, a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-amyl group, an isoamyl group, a 2-methylbutyl group, a 2,3-dimethylbutyl group, a 2-methylpentyl group, a 3-methylpentyl group, a 4-methylpentyl group, or a heptyl group. Suitable examples of the secondary alkyl group include, for example, an isopropyl group, a sec-butyl group, or a 1-ethylpropyl group. Among these, R aR is particularly preferably a primary alkyl group having 1 to 4 carbon atoms, a secondary alkyl group having 1 to 4 carbon atoms, or a phenyl group. b is particularly preferably a hydrogen atom.

[0036] Suitable examples of the homopolymer of the polyphenylene ether resin (a) include 2,6-dialkylphenylene ether polymers, etc. Examples of the 2,6-dialkylphenylene ether polymers include 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), etc.

[0037] Suitable copolymers of polyphenylene ether resin (a) include, for example, 2,6-dialkylphenol / 2,3,6-trialkylphenol copolymers, graft copolymers obtained by graft polymerizing styrene onto poly(2,6-dimethyl-1,4-phenylene ether), and graft copolymers obtained by graft polymerizing styrene onto 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymers, etc. Examples of the 2,6-dialkylphenol / 2,3,6-trialkylphenol copolymers include, for example, 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymers, 2,6-dimethylphenol / 2,3,6-triethylphenol copolymers, 2,6-diethylphenol / 2,3,6-trimethylphenol copolymers, and 2,6-dipropylphenol / 2,3,6-trimethylphenol copolymers.

[0038] Among these, poly(2,6-dimethyl-1,4-phenylene ether) and 2,6-dimethylphenol / 2,3,6-trimethylphenol random copolymer are particularly preferred as the polyphenylene ether resin (a). In addition, as described in, for example, JP-A-2005-344065, a polyphenylene ether resin having a specified number of terminal groups and copper content can be suitably used as the polyphenylene ether resin (a).

[0039] The molecular weight of the polyphenylene ether resin (a) is preferably 0.2 dl / g or more, more preferably 0.3 dl / g or more, in terms of the viscosity average molecular weight calculated from the intrinsic viscosity measured at a temperature of 30°C using chloroform as a solvent. By setting the viscosity average molecular weight of the polyphenylene ether resin (a) to a value in which the intrinsic viscosity is 0.2 dl / g or more, the mechanical strength of the PPE resin composition (Z) tends to be improved. In addition, the intrinsic viscosity is preferably 0.8 dl / g or less, more preferably 0.6 dl / g or less. By setting the viscosity average molecular weight of the polyphenylene ether resin (a) to a value in which the intrinsic viscosity is 0.8 dl / g or less, the fluidity of the PPE resin composition (Z) is improved, and as a result, the molding process of the PPE resin composition (Z) tends to be facilitated. The viscosity average molecular weight of the polyphenylene ether resin (a) may be such that the intrinsic viscosity is within the range of 0.2 to 0.8 dl / g by using two or more polyphenylene ether resins having different intrinsic viscosities in combination.

[0040] The method for producing the polyphenylene ether resin (a) is not particularly limited, and known methods can be used. For example, the polyphenylene ether resin (a) can be produced by a method such as oxidative polymerization of a monomer such as 2,6-dimethylphenol in the presence of an amine copper catalyst. In this case, the intrinsic viscosity can be controlled to a desired range by selecting reaction conditions. For example, the control of the intrinsic viscosity can be achieved by selecting conditions such as polymerization temperature, polymerization time, and catalyst amount.

[0041] As the polyphenylene ether resin (a) described above, one type of polyphenylene ether resin may be used alone, or two or more types of polyphenylene ether resins may be used in combination.

[0042] [Styrene-based resin (b)] Next, the styrene-based resin (b) according to the embodiment of the present invention will be described in detail. The styrene-based resin (b) is a resin component used in the PPE-based resin composition (Z) according to the embodiment of the present invention, and is included in the PPE-based resin composition (Z) as one component of the polyphenylene ether-containing resin (A). In this case, the polyphenylene ether-containing resin (A) is a modified PPE-based resin. For example, the styrene-based resin (b) may be a polymer of a styrene-based monomer, a copolymer of a styrene-based monomer and another copolymerizable monomer, or a styrene-based graft copolymer.

[0043] More specifically, the styrene resin (b) may be polystyrene (PS), high impact polystyrene (HIPS), acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-acrylonitrile-butadiene-styrene copolymer (MABS resin), acrylonitrile-acrylic rubber-styrene copolymer (AAS resin), acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin), styrene-IPN type rubber copolymer, or a mixture thereof. The styrene resin (b) may also have stereoregularity such as syndiotactic polystyrene. Among these, polystyrene and high impact polystyrene are preferred as the styrene resin (b).

[0044] The weight average molecular weight (Mw) of the styrene resin (b) is, for example, 50,000 or more, preferably 100,000 or more, and more preferably 150,000 or more. The upper limit of the Mw of the styrene resin (b) is, for example, 500,000 or less, preferably 400,000 or less, and more preferably 300,000 or less. The Mw of the styrene resin (b) can be measured by a measurement method such as size exclusion chromatography.

[0045] The method for producing the styrene resin (b) is not particularly limited, and known methods can be used. For example, the styrene resin (b) can be produced by emulsion polymerization, solution polymerization, suspension polymerization, bulk polymerization, or the like. As the styrene resin (b), one type of styrene resin may be used alone, or two or more types of styrene resins may be mixed and used.

[0046] Such a styrene-based resin (b) is contained in the polyphenylene ether-containing resin (A) at a content rate lower than that of the polyphenylene ether-based resin (a) which is the main component. For example, from the viewpoint of improving the heat resistance (good deflection temperature under load) of the PPE-based resin composition (Z), it is preferable that the content rate of the polyphenylene ether-based resin (a) is 55% by mass or more and the content rate of the styrene-based resin (b) is 45% by mass or less in 100% by mass of the polyphenylene ether-containing resin (A). Furthermore, from the viewpoint of improving the flame retardancy and mechanical strength of the PPE-based resin composition (Z), it is more preferable that the content rate of the polyphenylene ether-based resin (a) is 65% by mass or more and the content rate of the styrene-based resin (b) is 35% by mass or less in 100% by mass of the polyphenylene ether-containing resin (A). In particular, when a molded article made of the PPE resin composition (Z) is required to have a thin wall and high flame retardancy, the content of the polyphenylene ether resin (a) is preferably 80% by mass or more and the content of the styrene resin (b) is preferably 20% by mass or less, the content of the polyphenylene ether resin (a) is more preferably 85% by mass or more and the content of the styrene resin (b) is 15% by mass or less, and the content of the polyphenylene ether resin (a) is still more preferably 90% by mass or more and the content of the styrene resin (b) is 10% by mass or less. In addition, the content of the polyphenylene ether resin (a) may be 100% by mass or less and the content of the styrene resin (b) may be 0% by mass or more in 100% by mass of the polyphenylene ether-containing resin (A).

[0047] In an embodiment of the present invention, the heat resistance of the PPE resin composition (Z) is represented by, for example, a deflection temperature under load measured in accordance with JIS K7191-2 or ISO75-2. The deflection temperature under load of the PPE resin composition (Z) can be increased to a predetermined value or higher by containing the polyphenylene ether resin (a). For example, the deflection temperature under load of the PPE resin composition (Z) is preferably 100°C or higher under measurement conditions in which a load of 1.80 MPa is applied.

[0048] [Other resin components] Next, among the resin components contained in the polyphenylene ether-containing resin (A), the resin components other than the polyphenylene ether-based resin (a) and the styrene-based resin (b) described above will be described in detail. The polyphenylene ether-containing resin (A) may contain other resin components other than the polyphenylene ether-based resin (a) and the styrene-based resin (b) described above, within a range that does not impair the effect of improving the properties such as the mechanical strength and tracking resistance of the PPE-based resin composition (Z) according to the embodiment of the present invention.

[0049] Specifically, examples of the other resin components include thermoplastic resins and thermosetting resins. Examples of the thermoplastic resins include olefin-based resins such as polyamide resins, polyester resins, polyphenylene sulfide resins, liquid crystal polyester resins, polycarbonate resins, polyacetal resins, polyacrylonitrile resins, acrylic resins, polyethylene resins, and polypropylene copolymer resins. Examples of the thermosetting resins include epoxy resins, melamine resins, and silicone resins.

[0050] The polyphenylene ether-containing resin (A) may contain, as the other resin components, two or more kinds of thermoplastic resins, two or more kinds of thermosetting resins, or a combination of two or more kinds of these thermoplastic resins and thermosetting resins. In addition, the content of the other resin components in 100% by mass of the polyphenylene ether-containing resin (A) is preferably 5% by mass or less, more preferably 2% by mass or less, even more preferably 1% by mass or less, and particularly preferably 0.5% by mass or less.

[0051] [Polypropylene homopolymer (c)] Next, the polypropylene homopolymer (c), which is one of the components constituting the PPE resin composition (Z) according to the embodiment of the present invention, will be described in detail. The polypropylene homopolymer (c) is a crystalline resin obtained by homopolymerizing propylene, and is contained in the PPE resin composition (Z) mainly for the purpose of improving the tracking resistance of the PPE resin composition (Z).

[0052] The density of the polypropylene homopolymer (c) is not particularly limited, but is preferably about 0.9 g / cm3 as measured by a method conforming to JIS K7112. 3 That's about it.

[0053] Here, in a resin composition containing a polypropylene resin obtained by polymerization of propylene, a nucleating agent such as a metal salt of an aromatic carboxylic acid or talc may be generally blended for the purpose of improving the crystallinity of the polypropylene. However, when a nucleating agent is blended into a polypropylene resin, the tracking resistance of the resin composition containing the polypropylene resin may be deteriorated. Therefore, the polypropylene homopolymer (c) according to the embodiment of the present invention is preferably a polypropylene resin that does not contain a nucleating agent.

[0054] The melt flow rate (hereinafter, appropriately referred to as MFR) of the polypropylene homopolymer (c) is measured in accordance with JIS K7210. For example, under the measurement conditions of a temperature of 230° C. and a load of 2.16 kg, it is preferably 0.5 to 100 g / 10 min, more preferably 2.0 to 50 g / 10 min, even more preferably 3.0 to 40 g / 10 min, and particularly preferably 3.0 to 30 g / 10 min. If the MFR of the polypropylene homopolymer (c) under the above measurement conditions is less than 0.5 g / 10 min, the processability (moldability) of the PPE resin composition (Z) containing the polypropylene homopolymer (c) may be impaired. If the MFR of the polypropylene homopolymer (c) under the above measurement conditions is less than 3.0 g / 10 min, the effect of improving the tracking resistance of the PPE resin composition (Z) by the polypropylene homopolymer (c) may be reduced compared to when the MFR is 3.0 g / 10 min or more. Therefore, the MFR is more preferably 3.0 g / 10 min or more. If the MFR of the polypropylene homopolymer (c) under the above measurement conditions exceeds 100 g / 10 min, the mechanical strength of the PPE resin composition (Z) containing the polypropylene homopolymer (c) may be impaired. From the viewpoint of suppressing the decrease in the mechanical strength of the PPE resin composition (Z), the MFR is more preferably 40 g / 10 min or less.

[0055] In the present embodiment, as the polypropylene homopolymer (c), one type of polypropylene homopolymer may be used alone, or two or more types of polypropylene homopolymers may be blended and used.

[0056] In the PPE resin composition (Z) according to the embodiment of the present invention, the content of the polypropylene homopolymer (c) is preferably 2 parts by mass or more, more preferably 4 parts by mass or more, even more preferably 5 parts by mass or more, and particularly preferably 6 parts by mass or more, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The content of the polypropylene homopolymer (c) is preferably 20 parts by mass or less, more preferably 19 parts by mass or less, even more preferably 18 parts by mass or less, and particularly preferably 17 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By including the polypropylene homopolymer (c) in the PPE resin composition (Z) within this range, the tracking resistance of the PPE resin composition (Z) can be improved.

[0057] The tracking resistance of the PPE resin composition (Z) is represented by a comparative tracking index (hereinafter referred to as CTI value), which is an index showing the resistance of an insulating material to tracking. The CTI value of the PPE resin composition (Z) is measured in accordance with IEC60112, and can be increased to a predetermined value or more by containing the polypropylene homopolymer (c). For example, the CTI value of the PPE resin composition (Z) is preferably 400V or more, more preferably 500V or more, even more preferably 525V or more, and particularly preferably 550V or more.

[0058] If the content of the polypropylene homopolymer (c) is less than 2 parts by mass, the effect of improving tracking resistance due to the polypropylene homopolymer (c) cannot be obtained. In other words, the CTI value of the PPE resin composition (Z) does not improve to the target value. If the content of the polypropylene homopolymer (c) exceeds 20 parts by mass, the mechanical strength of the PPE resin composition (Z) decreases. Furthermore, since the polypropylene homopolymer (c) is a resin that easily burns, the flame retardancy of the PPE resin composition (Z) is also impaired.

[0059] [Inorganic filler (d)] Next, the inorganic filler (d) according to the embodiment of the present invention will be described in detail. The inorganic filler (d) is one of the components constituting the PPE resin composition (Z) according to the embodiment of the present invention, and is contained in the PPE resin composition (Z) mainly for the purpose of improving the mechanical strength of the PPE resin composition (Z).

[0060] Examples of such inorganic fillers (d) include glass fibers, glass flakes, glass beads, milled fibers, alumina fibers, carbon fibers, aramid fibers, titanium oxide, boron nitride, potassium titanate whiskers, silica, mica, talc, wollastonite, etc. Among these, the inorganic filler (d) is preferably at least one selected from glass fibers, mica, and talc, and particularly preferably glass fibers, because of its high effect of improving the mechanical strength of the PPE resin composition (Z) relative to the amount added.

[0061] The shape of the inorganic filler (d) is not particularly limited. As the inorganic filler (d), one type of inorganic filler may be used alone, or two or more types of inorganic fillers may be mixed and used.

[0062] The glass fibers preferably used as the inorganic filler (d) have an average diameter of 20 μm or less. From the viewpoint of further improving the balance of physical properties (heat resistance, impact strength) of the PPE resin composition (Z) and further reducing the warpage of the PPE resin composition (Z) during molding, it is particularly preferable that the glass fibers have an average diameter of 1 to 15 μm.

[0063] The length of the glass fiber as the inorganic filler (d) is not specified, and it can be selected from long fiber type (roving) or short fiber type (chopped strand), etc. In this case, the number of bundled glass fibers is preferably about 100 to 5000. In addition, if the average length of the glass fibers contained in the PPE resin composition (Z) after kneading is 0.1 mm or more, the inorganic filler (d) may be a pulverized strand product called so-called milled fiber or glass powder, or a continuous single fiber sliver. In addition, the glass fiber as the inorganic filler (d) may have a non-alkali raw glass composition. Examples of the glass fiber include E glass, C glass, and S glass. Among these, E glass is preferable as the inorganic filler (d).

[0064] In addition, it is more preferable to use the inorganic filler (d) that has been surface-treated with a surface treatment agent such as a coupling agent in order to improve adhesion with the resin. When the surface-treated inorganic filler (d) is used, it tends to have excellent durability, moist heat resistance, hydrolysis resistance, and heat shock resistance. Any conventionally known surface treatment agent can be used, and specifically, for example, various coupling agents such as aminosilane-based, epoxysilane-based, allylsilane-based, vinylsilane-based, and titanate-based are preferred. Among these, aminosilane-based, epoxysilane-based, and vinylsilane-based surface treatment agents are preferred, and specifically, for example, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-(2-aminoethyl)aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, and γ-methacryloxypropyltrimethoxysilane are preferred examples. These silane compounds may be used alone or in combination of two or more types. Furthermore, as the inorganic filler (d), in addition to the above-mentioned surface treatment agents, if necessary, those that have been surface-treated with lubricants such as fatty acid amide compounds and silicone oils, antistatic agents such as quaternary ammonium salts, resins having film-forming ability such as epoxy resins and urethane resins, and mixtures of resins having film-forming ability with heat stabilizers, flame retardants, etc. can also be used.

[0065] In the PPE resin composition (Z) according to the embodiment of the present invention, when two or more kinds of inorganic fillers (d) are blended and used, the content of glass fiber in 100% by mass of the blended inorganic filler (d) is preferably 25% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more. By using glass fiber within this range as one component of the inorganic filler (d), the mechanical strength of the PPE resin composition (Z) can be effectively improved.

[0066] In the PPE resin composition (Z) according to the embodiment of the present invention, the content of the inorganic filler (d) is 1 part by mass or more, preferably 3 parts by mass or more, more preferably 5 parts by mass or more, and even more preferably 6 parts by mass or more, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The content of the inorganic filler (d) is 25 parts by mass or less, preferably 23 parts by mass or less, more preferably 20 parts by mass or less, and even more preferably 19 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By including the inorganic filler (d) in the PPE resin composition (Z) within this range, the mechanical strength of the PPE resin composition (Z) can be improved, and further, the dimensional accuracy can be improved and the difference in thermal expansion coefficient with other materials (metal materials, etc.) can be reduced. In the PPE resin composition (Z), the lower limit of the mass ratio ((d) / (c)) of the inorganic filler (d) to the polypropylene homopolymer (c) is preferably 0.5 or more, more preferably 0.6 or more, and even more preferably 0.7 or more. The upper limit of the mass ratio ((d) / (c)) is preferably 3.0 or less, more preferably 2.5 or less, and even more preferably 1.5 or less.

[0067] When the content of the inorganic filler (d) is 12 parts by mass or less per 100 parts by mass of the polyphenylene ether-containing resin (A), the content of the polypropylene homopolymer (c) is preferably 2 to 18 parts by mass, more preferably 4 to 16 parts by mass, and even more preferably 5 to 15 parts by mass. When the content of the inorganic filler (d) is more than 12 parts by mass per 100 parts by mass of the polyphenylene ether-containing resin (A), the content of the polypropylene homopolymer (c) is preferably 7 to 20 parts by mass, more preferably 8 to 19 parts by mass, and even more preferably 9 to 18 parts by mass.

[0068] In an embodiment of the present invention, the mechanical strength of the PPE resin composition (Z) is represented, for example, by tensile strength. The tensile strength of the PPE resin composition (Z) is measured in accordance with ISO 527, and can be increased to a predetermined value or more by containing the inorganic filler (d). For example, the tensile strength of the PPE resin composition (Z) is preferably 59 MPa or more, and more preferably 60 MPa or more.

[0069] If the content of the inorganic filler (d) is less than 1 part by mass, the effect of improving the mechanical strength by the inorganic filler (d) cannot be obtained. That is, the tensile strength of the PPE resin composition (Z) does not improve to the target value. If the content of the inorganic filler (d) exceeds 25 parts by mass, the tracking resistance of the PPE resin composition (Z) is significantly deteriorated. In this case, the PPE resin composition (Z) cannot secure a CTI value of, for example, 400V or more as tracking resistance.

[0070] [Flame retardants (e)] Next, the flame retardant (e) applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may further contain a flame retardant (e) in addition to the polyphenylene ether-containing resin (A), the polypropylene homopolymer (c) and the inorganic filler (d) described above. The flame retardant (e) is used to impart the PPE resin composition (Z) with flame retardancy required according to the application of the PPE resin composition (Z). By containing this flame retardant (e), the PPE resin composition (Z) has better flame retardancy.

[0071] The flame retardant (e) is not particularly limited as long as it improves the flame retardancy of the PPE resin composition (Z), but is preferably a phosphorus-based flame retardant that is compatible with the polyphenylene ether resin (a) described above. Among phosphorus-based flame retardants, the flame retardant (e) is more preferably a phosphate ester-based flame retardant. As the flame retardant (e), one type of flame retardant may be used alone, or two or more types of flame retardants with different compositions may be used in combination.

[0072] In particular, when a phosphorus-based flame retardant is used as the flame retardant (e), the phosphorus-based flame retardant is preferably, for example, a phosphate ester-based flame retardant represented by the following general formula (2).

[0073] [ka]

[0074] In the general formula (2), R 1 , R 2 , R 3 , R 4 each independently represents an aryl group. The aryl group may be substituted or unsubstituted. X represents a divalent aromatic group. The divalent aromatic group may have another substituent or may not have a substituent. n represents an integer of 0 to 5.

[0075] R 1 , R 2 , R 3 , R 4 Examples of the aryl group represented by each of R include a phenyl group and a naphthyl group. Examples of the divalent aromatic group represented by X include a phenylene group, a naphthylene group, and a group derived from a bisphenol. 1 , R 2 , R 3 , R 4 Examples of the substituents in each of and X include an alkyl group, an alkoxy group, and a hydroxyl group. When the integer n is 0, the phosphate ester flame retardant represented by general formula (2) is a phosphate ester. When the integer n is any one of 1 to 5, the phosphate ester flame retardant represented by general formula (2) is a condensed phosphate ester. The condensed phosphate ester may be a mixture.

[0076] Examples of such phosphate ester-based flame retardants include bisphenol A bisphosphate, hydroquinone bisphosphate, resorcinol bisphosphate, or substitution products, condensates, etc. Commercially available condensed phosphate esters that can be suitably used as the phosphate ester-based flame retardants include "CR733S" (resorcinol bis(diphenyl phosphate)), "CR741" (bisphenol A bis(diphenyl phosphate)), "PX-200" (resorcinol bis(dixylenyl phosphate)) manufactured by Daihachi Chemical Industry Co., Ltd., and "FP500" (resorcinol bis(dixylenyl phosphate)) manufactured by ADEKA Corporation, and are easily available.

[0077] When the PPE resin composition (Z) according to the embodiment of the present invention contains a flame retardant (e), the content of the flame retardant (e) is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 12 parts by mass or more, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The content of the flame retardant (e) is preferably 35 parts by mass or less, more preferably 30 parts by mass or less, even more preferably 27 parts by mass or less, and particularly preferably 25 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By containing the flame retardant (e) in this range in the PPE resin composition (Z), the flame retardancy of the PPE resin composition (Z) can be improved. In particular, when the PPE resin composition (Z) contains the polypropylene homopolymer (c) for the purpose of improving tracking resistance, the flame retardancy of the PPE resin composition (Z) may be reduced due to the flammability of the polypropylene homopolymer (c). In contrast, by containing the flame retardant (e) in the PPE resin composition (Z) in the above-mentioned content, the decrease in flame retardancy caused by the polypropylene homopolymer (c) can be suppressed, and the flame retardancy of the PPE resin composition (Z) can be improved.

[0078] In an embodiment of the present invention, the flame retardancy of the PPE resin composition (Z) is represented by a flammability level (grades such as V-0, V-1, V-2, etc.) determined based on a flammability test in accordance with the UL94 standard (hereinafter referred to as a UL94V test). By including the flame retardant (e) described above, the flame retardancy of the PPE resin composition (Z) can be improved to a level satisfying any of the flammability levels based on the UL94V test (for example, V-1 or higher).

[0079] If the content of the flame retardant (e) is less than 5 parts by mass, the flame retardant (e) may not be able to impart flame retardancy to the PPE resin composition (Z) even if it is contained in the PPE resin composition (Z). If the content of the flame retardant (e) is more than 35 parts by mass, the mechanical strength and heat resistance of the PPE resin composition (Z) may decrease.

[0080] When the content of the inorganic filler (d) is 12 parts by mass or more per 100 parts by mass of the polyphenylene ether-containing resin (A), in order to impart flame retardancy to the PPE resin composition (Z), the content of the flame retardant (e) is preferably 15 to 35 parts by mass, more preferably 18 to 30 parts by mass, and even more preferably 19 to 27 parts by mass.

[0081] [Flame retardant synergist (f)] Next, the flame retardant auxiliary (f) applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may further contain a flame retardant auxiliary (f) in addition to the above-mentioned polyphenylene ether-containing resin (A), polypropylene homopolymer (c), inorganic filler (d), etc. The flame retardant auxiliary (f) is a component that is blended into the PPE resin composition (Z) for the purpose of imparting flame retardancy to the PPE resin composition (Z) and improving tracking resistance.

[0082] Such flame retardant synergists (f) include alkaline earth metal salts (e.g., carbonates such as calcium carbonate, and (hydrogen) phosphates such as calcium hydrogen phosphate), metal hydroxides (e.g., aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, and alumina hydrate (boehmite)), inorganic acid metal compounds (e.g., (hydrous) metal borates such as (hydrous) zinc borate, (hydrous) calcium borate, and (hydrous) aluminum borate, and (hydrous) metal stannates such as (hydrous) zinc stannate), nitrogen-containing compounds (e.g., Examples of the flame retardant auxiliary include aminotriazine compounds (melamine, guanamine, melamine condensates such as melam and melem, etc.), salts of aminotriazine compounds, organic acid or inorganic acid salts of the aminotriazine compounds (specifically, cyanurates such as melamine cyanurate, phosphates such as melamine polyphosphate, etc.), layered double hydroxides (hydrotalcite, etc.), metal sulfates (calcium sulfate, magnesium sulfate, barium sulfate, etc.), and metal sulfides (zinc sulfide, molybdenum sulfide, tungsten sulfide, etc.). Among these, preferred flame retardant auxiliary (f) is an alkaline earth metal salt, a metal hydroxide, a nitrogen-containing compound, an inorganic acid metal compound, or a layered double hydroxide. That is, the flame retardant auxiliary (f) preferably contains at least one selected from alkaline earth metal salts, metal hydroxides, nitrogen-containing compounds, inorganic acid metal compounds, and layered double hydroxides. More preferred as the flame retardant auxiliary (f) is an alkaline earth metal salt (for example, calcium carbonate). These flame retardant auxiliaries (f) can be used alone or in combination of two or more.

[0083] The flame retardant assistant (f) may be surface-treated. The surface treatment applied to the flame retardant assistant (f) is not particularly limited, and may be, for example, a surface treatment with a fatty acid, a resin acid, a silicic acid, a phosphoric acid, a silane coupling agent, an alkylarylsulfonic acid or a salt thereof, etc. Examples of the fatty acid include a saturated or unsaturated fatty acid having 6 to 31 carbon atoms, preferably a saturated or unsaturated fatty acid having 12 to 28 carbon atoms. Among them, from the viewpoint of dispersibility and handling during production, a flame retardant assistant (f) surface-treated with a fatty acid is preferred. When calcium carbonate surface-treated with a fatty acid is used as the flame retardant assistant (f), the flame retardant assistant (f) is more uniformly dispersed in the polyphenylene ether-containing resin (A), and thus the tracking resistance and flame retardancy of the PPE resin composition (Z) are further improved.

[0084] When the PPE resin composition (Z) according to the embodiment of the present invention contains a flame retardant auxiliary (f), the content of the flame retardant auxiliary (f) is preferably 0.5 parts by mass or more, more preferably 2 parts by mass or more, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The content of the flame retardant auxiliary (f) is preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and even more preferably 30 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By including the flame retardant auxiliary (f) in the PPE resin composition (Z) within this range, the PPE resin composition (Z) is given flame retardancy and the tracking resistance of the PPE resin composition (Z) can be improved.

[0085] For example, when the PPE resin composition (Z) contains the flame retardant (e) for the purpose of improving flame retardancy, the flame retardant (e) may promote the formation of a carbonized layer (char) that causes a short circuit, which may result in a decrease in the tracking resistance of the PPE resin composition (Z). In contrast, the flame retardant assistant (f) can suppress the decrease in tracking resistance caused by the flame retardant (e) and improve the tracking resistance of the PPE resin composition (Z) (improve the CTI value) by being contained in the PPE resin composition (Z) at the above content. Even when the flame retardant assistant (f) is used alone, it is possible to suppress the generation of carbonized components and promote their volatilization by the endothermic dilution action due to the dehydration or decomposition of the flame retardant assistant (f), thereby improving the tracking resistance. In addition, the flame retardant assistant (f) can assist the flame retardant (e) in imparting flame retardancy to the PPE resin composition (Z), thereby improving the flame retardancy of the PPE resin composition (Z) in cooperation with the flame retardant (e).

[0086] If the content of the flame retardant auxiliary (f) is less than 0.5 parts by mass, the flame retardant auxiliary (f) may not be able to improve the tracking resistance of the PPE resin composition (Z) even if it is contained in the PPE resin composition (Z), and may also not be able to impart flame retardancy to the PPE resin composition (Z). If the content of the flame retardant auxiliary (f) (e.g., an alkaline earth metal salt) exceeds 50 parts by mass, the mechanical properties such as rigidity and impact resistance, and heat resistance of the PPE resin composition (Z) may decrease.

[0087] When the content of the inorganic filler (d) is 12 parts by mass or less relative to 100 parts by mass of the polyphenylene ether-containing resin (A), the content of the flame retardant auxiliary (f) is preferably 0.5 to 50 parts by mass, more preferably 2 to 40 parts by mass, and even more preferably 5 to 25 parts by mass. When the content of the inorganic filler (d) is more than 12 parts by mass relative to 100 parts by mass of the polyphenylene ether-containing resin (A), the content of the flame retardant auxiliary (f) is preferably 3 to 50 parts by mass, more preferably 5 to 40 parts by mass, and even more preferably 10 to 30 parts by mass. By including the flame retardant auxiliary (f) in the PPE resin composition (Z) in such a content range, the tracking resistance and flame retardancy of the PPE resin composition (Z) due to the addition of the flame retardant auxiliary (f) can be more effectively improved. Furthermore, it is possible to prevent undesirable problems such as a decrease in the heat resistance, mechanical properties, and flowability of the PPE resin composition (Z).

[0088] The total content of the polyphenylene ether resin (a), styrene resin (b), polypropylene homopolymer (c) and inorganic filler (d) contained in the PPE resin composition (Z) is preferably 95% by mass or more, more preferably 97% by mass or more, even more preferably 98% by mass or more, and particularly preferably 99% by mass or more, based on 100% by mass of the PPE resin composition (Z). By keeping the total content within the above range, a PPE resin composition (Z) having good tracking resistance and mechanical strength can be obtained.

[0089] When the PPE resin composition (Z) further contains a flame retardant (e) and a flame retardant auxiliary (f), the total content of the polyphenylene ether resin (a), the styrene resin (b), the polypropylene homopolymer (c), the inorganic filler (d), the flame retardant (e), and the flame retardant auxiliary (f) in the PPE resin composition (Z) is preferably 95% by mass or more, more preferably 97% by mass or more, even more preferably 98% by mass or more, and particularly preferably 99% by mass or more, based on 100% by mass of the PPE resin composition (Z). By setting the total content within the above range, a PPE resin composition (Z) having good tracking resistance and mechanical strength can be obtained.

[0090] [Phosphorus stabilizer (g)] Next, the phosphorus-based stabilizer (g) applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may further contain a phosphorus-based stabilizer (g) in addition to the polyphenylene ether-containing resin (A), polypropylene homopolymer (c), inorganic filler (d), etc. described above. The phosphorus-based stabilizer (g) is a component contained in the PPE resin composition (Z) for the purpose of improving the thermal stability during melt-kneading in the manufacturing and molding process of the PPE resin composition (Z) and during use, and imparting flame retardancy to the PPE resin composition (Z).

[0091] Examples of the phosphorus-based stabilizer (g) include phosphite-based compounds and phosphonite-based compounds. These compounds may be used alone or in combination as the phosphorus-based stabilizer (g). The phosphorus-based stabilizer (g) preferably contains at least one of the phosphite-based compounds and the phosphonite-based compounds.

[0092] Specific examples of phosphite compounds include tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butylphenyl)pentaerythritol-di-phosphite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol-di-phosphite, 2,2-methylenebis(4,6-di-t-butylphenyl)octylphosphite, 4,4'-butylidene-bis-(3-methyl-6-t-butylphenyl-di-tridecyl)phosphite, 1,1,3-tris(2-methyl-4-di-tridecylphosphite-5-t-butyl-phenyl)butane, tris(mixed mono- and di-nonylphenyl)phosphite, tris(nonylphenyl)phosphite, 4,4'-isopropylidenebis(phenyl-dialkylphosphite), and the like. Among these, tris(2,4-di-t-butylphenyl)phosphite, 2,2-methylenebis(4,6-di-t-butylphenyl)octylphosphite, and bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol-diphosphite are preferred.

[0093] Specific examples of phosphonite compounds include tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylene diphosphonite, 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, tetrakis(2,6-di-t-butyl-5-ethylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,3,4-tributylphenyl)-4,4'-biphenylene diphosphonite, tetrakis(2,4,6-tri-t-butylphenyl)-4,4'-biphenylene diphosphonite, etc. Among these, tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylene diphosphonite is preferred.

[0094] When the PPE resin composition (Z) according to the embodiment of the present invention contains a phosphorus-based stabilizer (g), the content of the phosphorus-based stabilizer (g) is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, even more preferably 1.0 parts by mass or more, and particularly preferably 2.0 parts by mass or more, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The content of the phosphorus-based stabilizer (f) is preferably 20.0 parts by mass or less, more preferably 10.0 parts by mass or less, even more preferably 7.0 parts by mass or less, and particularly preferably 5.0 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By containing the phosphorus-based stabilizer (g) in this range in the PPE resin composition (Z), the thermal stability during melt-kneading in the manufacturing and molding process of the PPE resin composition (Z) and during use can be improved, and the flame retardancy of the PPE resin composition (Z) can be improved. Furthermore, when the PPE resin composition (Z) contains the phosphorus-based stabilizer (g) in an amount within this range, it is preferable that, out of 100 mass% of the polyphenylene ether-containing resin (A) in the PPE resin composition (Z), the content of the polyphenylene ether-based resin (a) is 90 to 100 mass%, and the content of the styrene-based resin (b) is 0 to 10 mass%.

[0095] [Black pigment (h)] Next, the black pigment (h) applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may further contain a black pigment (h) for the purpose of color matching, in addition to the polyphenylene ether-containing resin (A), polypropylene homopolymer (c), and inorganic filler (d) described above.

[0096] Examples of the black pigment (h) include carbon black, carbon nanotubes, and thermoplastic resin masterbatches thereof. When the PPE resin composition (Z) contains the black pigment (h), the content of the black pigment (h) is preferably 2.0 parts by mass or less, more preferably 1.5 parts by mass or less, even more preferably 1.0 parts by mass or less, and particularly preferably 0.5 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The lower limit of the content of the black pigment (h) is not particularly determined as long as the color of the PPE resin composition (Z) can be adjusted, but it is preferably 0.01 parts by mass or more. By including the black pigment (h) in the PPE resin composition (Z) within this range, the color of the PPE resin composition (Z) can be adjusted without impairing the tracking resistance.

[0097] [White pigment (i)] Next, the white pigment (i) applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may further contain a white pigment (i) for the purpose of color matching, in addition to the polyphenylene ether-containing resin (A), polypropylene homopolymer (c), and inorganic filler (d) described above.

[0098] Examples of the white pigment (i) include titanium oxide and zinc sulfide. When the PPE resin composition (Z) contains the white pigment (i), the content of the white pigment (i) is preferably 7.0 parts by mass or less, more preferably 4.0 parts by mass or less, even more preferably 3.0 parts by mass or less, and particularly preferably 2.0 parts by mass or less, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The lower limit of the content of the white pigment (i) is not particularly determined as long as the color of the PPE resin composition (Z) can be adjusted, but it is preferably 0.01 parts by mass or more. By containing the white pigment (i) in the PPE resin composition (Z) in a content within this range, the color of the PPE resin composition (Z) can be adjusted without impairing the mechanical strength of the PPE resin composition (Z).

[0099] [Additives] Next, the additives applied to the PPE resin composition (Z) according to the embodiment of the present invention will be described in detail. The PPE resin composition (Z) may contain other additives in addition to the above-mentioned components such as the polyphenylene ether-containing resin (A), the polypropylene homopolymer (c) and the inorganic filler (d) within the scope of the present invention. Examples of such additives include tracking inhibitors, heat stabilizers other than the phosphorus-based stabilizer (g), ultraviolet absorbers, antioxidants, weather resistance improvers, foaming agents, lubricants, plasticizers, flow improvers, dispersants, conductive agents, antistatic agents, colorants other than the black pigment (h) or the white pigment (i), etc.

[0100] Among the above additives, examples of the heat stabilizer other than the phosphorus-based stabilizer (g) include hindered phenol compounds, sulfur-based compounds, zinc oxide, etc. These compounds may be used alone as the heat stabilizer, or two or more of them may be mixed and used.

[0101] Specific examples of hindered phenol compounds include n-octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate, 1,6-hexanediol-bis[3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], pentaerythritol-tetrakis[3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], 2,6-di-t-butyl-4-methylphenol, and 3,9-bis[1,1-dimethyl-2-{β-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]undeca. , triethylene glycol-bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate], 3,5-di-t-butyl-4-hydroxybenzylphosphonate-diethyl ester, 1,3,5-trimethyl-2,4,6-tris(3',5'-di-t-butyl-4'-hydroxybenzyl)benzene, 2,2-thio-diethylene bis[3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], tris-(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, N,N'-hexamethylene bis(3,5-di-t-butyl-4-hydroxy-hydrocinnamide), and the like. Among these, n-octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate, 1,6-hexanediol-bis[3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], 2,6-di-t-butyl-4-methylphenol, and 3,9-bis[1,1-dimethyl-2-{β-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]undecane are preferred.

[0102] Specific examples of sulfur-based compounds include didodecylthiodipropionate, ditetradecylthiodipropionate, dioctadecylthiodipropionate, pentaerythritol tetrakis(3-dodecylthiopropionate), pentaerythrityl tetrakis(3-tetradecylthiopropionate), pentaerythrityl tetrakis(3-tridecylthiopropionate), thiobis(N-phenyl-β-naphthylamine), 2-mercaptobenzothiazole, 2-mercaptobenzimidazole, tetramethylthiuram monosulfide, tetramethylthiuram disulfide, nickel dibutyldithiocarbamate, nickel isopropylxanthate, trilauryltrithiophosphite, etc. Among these, thioether-based antioxidants having a thioether structure can be suitably used as the heat stabilizer, since they receive oxygen from an oxidized substance and reduce it. The lower limit of the molecular weight of the sulfur-based compound is usually at least 200, and preferably at least 500. The upper limit of the molecular weight of the sulfur-based compound is usually at most 3,000.

[0103] Zinc oxide preferably has an average particle size of, for example, 0.02 to 1 μm, and more preferably has an average particle size of 0.08 to 0.8 μm.

[0104] For example, when the PPE resin composition (Z) contains the above-mentioned heat stabilizer, the content of the heat stabilizer is preferably 0.001 to 1 part by mass, more preferably 0.01 to 0.7 parts by mass, and even more preferably 0.02 to 0.5 parts by mass, relative to 100 parts by mass of the polyphenylene ether-containing resin (A). By setting the lower limit of the content of the heat stabilizer to 0.001 parts by mass or more, the effect of improving the thermal stability of the PPE resin composition (Z) can be sufficiently obtained. In addition, by setting the upper limit of the content of the heat stabilizer to 1 part by mass or less, contamination of the mold when molding the PPE resin composition (Z) and a decrease in the mechanical strength of the PPE resin composition (Z) can be prevented.

[0105] The PPE resin composition (Z) may contain one type of additive among the additives described above, or may contain a mixture of two or more types of additives. The PPE resin composition (Z) can effectively exhibit the functions of each additive contained therein. For example, when a weather resistance improver and a tracking prevention agent are blended into the PPE resin composition (Z), the weather resistance and tracking resistance of the PPE resin composition (Z) can be exhibited.

[0106] [Method for producing PPE resin composition (Z)] Next, a method for producing the PPE resin composition (Z) according to an embodiment of the present invention will be described in detail. The method for producing the PPE resin composition (Z) is not limited to a specific method, and known methods can be adopted. Examples of the production method include a melt-kneading method in which the above-mentioned polyphenylene ether-containing resin (A), polypropylene homopolymer (c), inorganic filler (d), and other various components that are mixed as necessary are melt-kneaded by a kneader and then cooled and solidified, and a solution mixing method in which the above-mentioned various components are added to an appropriate solvent and the soluble components or the soluble components and the insoluble components are mixed in a suspension state. Examples of the kneader used in the production method include a single-screw kneading extruder, a multi-screw kneading extruder, a Banbury mixer, a roll, and a Brabender plastogram. Examples of the solvent include hydrocarbons such as hexane, heptane, benzene, toluene, and xylene, and derivatives thereof.

[0107] From the viewpoint of industrial cost, the melt kneading method is preferred as a method for producing the PPE resin composition (Z). In the melt kneading method, the kneading temperature and the kneading time can be arbitrarily selected depending on the desired PPE resin composition (Z) and the type of kneading machine. For example, the kneading temperature is preferably 200 to 350°C, more preferably 220 to 320°C. The kneading time is preferably 20 minutes or less. If the kneading temperature exceeds 350°C, there is a risk of thermal degradation of the polyphenylene ether resin (a) or the styrene resin (b) contained in the polyphenylene ether-containing resin (A). As a result, there is a risk of deterioration of physical properties or poor appearance in a molded product of the PPE resin composition (Z).

[0108] [Molded products] Next, a molded article according to an embodiment of the present invention will be described in detail. The molded article according to an embodiment of the present invention is a molded article made of the above-mentioned PPE resin composition (Z), and can be produced, for example, by pelletizing the PPE resin composition (Z) and molding the resulting pellets by various molding methods. The molded article may also be produced by directly molding the PPE resin composition (Z) melt-kneaded in a kneader, without going through the above-mentioned pellets.

[0109] The molding method of the PPE resin composition (Z) is not limited to a specific method, and any known method can be used. For example, the molding method of the PPE resin composition (Z) includes various molding methods such as injection molding, injection compression molding, blow molding, extrusion molding, sheet molding, thermoforming, rotational molding, lamination molding, and press molding.

[0110] The molded article produced by the above molding method is made of the PPE resin composition (Z) according to the embodiment of the present invention, and therefore has excellent properties of the various components contained in the PPE resin composition (Z). In particular, the molded article maintains excellent heat resistance and processability due to the polyphenylene ether resin (a) and the styrene resin (b), while simultaneously achieving high mechanical strength due to the inorganic filler (d) and high tracking resistance due to the polypropylene homopolymer (c). In addition to the above properties, the molded article can have high flame retardancy due to the flame retardant (e), low specific gravity, high dimensional accuracy, hydrolysis resistance, dimensional stability, mechanical properties, and other excellent properties. Such molded articles can be widely used for various applications such as automobile-related parts, electronic device-related parts, and battery-related parts.

[0111] Specifically, examples of automobile-related parts to which the molded article according to the embodiment of the present invention can be applied include automobile exterior parts, outer panel parts, interior parts, underhood parts, etc. More specifically, examples of automobile exterior parts or outer panel parts include bumpers, fenders, door panels, moldings, emblems, engine hoods, wheel covers, roofs, spoilers, engine covers, etc. Examples of automobile interior parts include instrument panels, console box trims, etc.

[0112] Examples of electronic device-related parts to which the molded article according to the embodiment of the present invention can be applied include computer parts, computer peripheral device parts, office equipment parts, television parts, video deck parts, various disc player parts, cabinets and chassis for these electronic devices, refrigerator parts, air conditioner parts, and liquid crystal projector parts.

[0113] In addition, examples of battery-related parts to which the molded article according to the embodiment of the present invention can be applied include battery unit casings, electrolytic cells for secondary batteries, fuel cases for direct methanol fuel cells, and water pipes for fuel cells.

[0114] The molded article according to the embodiment of the present invention can also be applied to parts in fields (other fields) other than the above-mentioned automobile-related, electronic device-related, and battery-related fields. For example, parts in the other fields include water-cooling tanks, exterior cases for boilers, ink-peripheral parts and members of inkjet printers, and chassis. In addition to these, the molded article according to the embodiment of the present invention can also be applied to molded bodies such as water pipes and joints, and separators for lithium ion batteries obtained by stretching sheets or films.

[0115] As described above, the PPE resin composition (Z) according to the embodiment of the present invention contains a polyphenylene ether-containing resin (A) containing a polyphenylene ether-containing resin (a) or a polyphenylene ether-containing resin (a) and a styrene-based resin (b), and contains 2 to 20 parts by mass of a polypropylene homopolymer (c) and 1 to 25 parts by mass of an inorganic filler (d) relative to 100 parts by mass of the polyphenylene ether-containing resin (A). Therefore, excellent heat resistance, processability (moldability) and mechanical properties can be obtained due to the polyphenylene ether-based resin (a) and the styrene-based resin (b), and mechanical strength can be strengthened by the inorganic filler (d). Furthermore, tracking resistance, which is reduced due to the inorganic filler (d), can be improved by the polypropylene homopolymer (c). As a result, the PPE resin composition (Z) can achieve both high mechanical strength and high tracking resistance while maintaining excellent heat resistance.

[0116] Moreover, the PPE resin composition (Z) according to the embodiment of the present invention further contains 5 to 35 parts by mass of a flame retardant (e) per 100 parts by mass of the polyphenylene ether-containing resin (A). This allows the flame retardant (e) to improve the flame retardancy that is reduced due to the above-mentioned polypropylene homopolymer (c). As a result, the PPE resin composition (Z) can have excellent flame retardancy while enjoying the effect of improving tracking resistance due to the above-mentioned polypropylene homopolymer (c).

[0117] Moreover, the PPE resin composition (Z) according to the embodiment of the present invention further contains 0.5 to 50 parts by mass of a flame retardant auxiliary (f) per 100 parts by mass of the polyphenylene ether-containing resin (A). This allows the polypropylene homopolymer (c) and the flame retardant auxiliary (f) to improve the tracking resistance that is reduced due to the inorganic filler (d) or the flame retardant (e), and the flame retardancy can be improved by the flame retardant auxiliary (f). As a result, the PPE resin composition (Z) can have better flame retardancy while maintaining high tracking resistance.

[0118] Furthermore, by molding the above-mentioned PPE resin composition (Z), molded articles that enjoy the effects of the PPE resin composition (Z) can be easily obtained. By selecting the components of the raw material PPE resin composition (Z), such molded articles can have various properties (heat resistance, tracking resistance, mechanical strength, etc.) required depending on the application. EXAMPLES

[0119] The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the following examples.

[0120] (Examples 1 to 43, Comparative Examples 1 to 9) [Components of polyphenylene ether resin composition] The components of the polyphenylene ether resin composition (PPE resin composition) in each of Examples 1 to 43 and Comparative Examples 1 to 9 are as shown in Tables 1-1 to 1-3. In each of Examples 1 to 43, the polyphenylene ether resin (a), styrene resin (b), polypropylene homopolymer (c), inorganic filler (d), flame retardant (e), flame retardant assistant (f), phosphorus-based stabilizer (g), other stabilizer (k), black pigment (h), and white pigment (i) shown in Tables 1-1 and 1-2 are used as needed. The other stabilizer (k) is an example of an additive that is added to the above-mentioned PPE resin composition (Z) as needed. In each of Comparative Examples 1 to 9, the components shown in Tables 1-1 and 1-2 and the polyolefin (x) shown in Table 1-3 are used as needed. The polyolefin (x) is a polyolefin other than the polypropylene homopolymer (c) and is used in place of the polypropylene homopolymer (c).

[0121] As the polyphenylene ether resin (a), component (a-1) or component (a-2) shown in Table 1-1 is used. As the styrene resin (b), component (b-1), component (b-2) or component (b-3) shown in Table 1-1 is used. As the polypropylene homopolymer (c), component (c-1), component (c-2), component (c-3), component (c-4), component (c-5) or component (c-6) shown in Table 1-1 is used. As the inorganic filler (d), component (d-1), component (d-2), component (d-3) or component (d-4) shown in Table 1-1 is used. As the flame retardant (e), component (e-1) or component (e-2) shown in Table 1-2 is used. As the flame retardant synergist (f), component (f-1), component (f-2), component (f-3), component (f-4), component (f-5) or component (f-6) shown in Table 1-2 is used. As the phosphorus-based stabilizer (g), component (g-1) shown in Table 1-2 is used. As the other stabilizer (k), component (k-1) shown in Table 1-2, that is, a heat stabilizer other than the phosphorus-based stabilizer (g), is used. As the black pigment (h), component (h-1) shown in Table 1-2 is used. As the white pigment (i), component (i-1) or component (i-2) shown in Table 1-2 is used. As the polyolefin (x), component (x-1), component (x-2), component (x-3), component (x-4), component (x-5) or component (x-6) shown in Table 1-3 is used.

[0122] The MFRs shown in Tables 1-1 and 1-3 are melt flow rates measured in accordance with JIS K7210. The temperature conditions for measuring the MFRs are as shown in Tables 1-1 and 1-3. The load is 2.16 kg, although it is not shown in Tables 1-1 and 1-3.

[0123] [Table 1-1]

[0124] [Table 1-2]

[0125] [Table 1-3]

[0126] [Method for producing pellets of PPE resin composition] In each of Examples 1 to 43 and Comparative Examples 1 to 9, the components shown in Tables 1-1 to 1-3 above were mixed in the ratios (parts by mass) shown in Tables 2-1 to 2-7 below, and the mixture of the components was melt-kneaded using a twin-screw extruder (Shibaura Machine Co., Ltd.: TEM18SS) with a cylinder temperature of 280°C and a screw rotation speed of 350 rpm. This produced a PPE-based resin composition. Thereafter, strands of this PPE-based resin composition were extruded, and the extruded strands were cut (pelletized) to obtain pellets of this PPE-based resin composition.

[0127] [Method for producing molded products of PPE resin composition] In each of Examples 1 to 43 and Comparative Examples 1 to 9, pellets of the above-mentioned PPE resin composition were dried at 80°C for 2 hours, and then fed to an injection molding machine (Shibaura Machine Co., Ltd.: EC75SX), which was used to injection mold ISO3167 Type A test pieces (hereinafter referred to as ISO test pieces) according to a molding method in accordance with ISO15103. The conditions during this injection molding were a cylinder temperature of 280°C and a mold temperature of 70°C.

[0128] In each of Examples 1 to 43 and Comparative Examples 1 to 9, the dried pellets were fed to an injection molding machine (NEX80-9E manufactured by Nissei Plastics Co., Ltd.), and molded articles made of PPE-based resin compositions with dimensions of 60 mm x 60 mm x 3 mm were produced using this injection molding machine. The cylinder temperature and mold temperature during this injection molding were the same as those for the ISO test pieces described above.

[0129] [Evaluation of tracking resistance] In each of Examples 1 to 43 and Comparative Examples 1 to 9, the tracking resistance was evaluated for the molded articles of the above-mentioned PPE resin compositions. Specifically, the molded articles, each having dimensions of length×width×thickness=60 mm×60 mm×3 mm, prepared as described above, were used to measure the maximum voltage at which tracking breakdown of the molded articles did not occur, that is, the CTI value (unit: V), by a measurement method conforming to IEC60112 (electrolyte used: solution A, number of drops: 50 drops).

[0130] [Mechanical strength evaluation] In each of Examples 1 to 43 and Comparative Examples 1 to 9, the mechanical strength of the molded articles of the above-mentioned PPE resin compositions was evaluated. In detail, the tensile strength (unit: MPa) and tensile breaking strain (unit: %) were measured by the measurement method based on ISO527 under the environment of temperature 23°C and humidity 50% using the ISO test pieces prepared as described above.

[0131] [Heat resistance evaluation] Heat resistance was evaluated for molded articles of the above-mentioned PPE resin compositions in each of Examples 1 to 43 and Comparative Examples 1 to 9. In detail, the parallel portion of the above-mentioned ISO test piece was machined to prepare a rectangular test piece with length x width x thickness = 80 mm x 10 mm x 4 mm, and the deflection temperature under load (unit: ° C.) was measured using this test piece under a load of 1.80 MPa by a measurement method based on ISO 75-2.

[0132] [Flame retardancy evaluation] In each of Examples 1 to 43 and Comparative Examples 1 to 9, the flame retardancy of molded articles of the above-mentioned PPE resin composition was evaluated. In detail, the pellets of the PPE resin composition obtained as described above were dried at 80°C for 2 hours, and then fed into an injection molding machine (Shibaura Machine Co., Ltd.: EC75SX), and a test piece for a flammability test, made of the PPE resin composition and having dimensions of 125 mm length x 13 mm x 1.5 mm thickness, was molded by this injection molding machine. The conditions during this injection molding were a cylinder temperature of 280°C and a mold temperature of 70°C.

[0133] Next, the test pieces for the flammability test obtained as described above were subjected to a vertical flammability test (UL94V test: 1.5 mmt) in accordance with the UL94 standard. In the evaluation of flame retardancy in each of Examples 1 to 43 and Comparative Examples 1 to 9, a grade was determined based on this vertical flammability test, and if the grade was not satisfied, it was determined to be poor (NG). The grades are classified as V-0, V-1, and V-2, in order from best to worst.

[0134] [Evaluation Results] Tables 2-1 to 2-7 show the content (parts by mass) of each component of the PPE resin composition and the results of each of the above evaluations in each of Examples 1 to 43 and Comparative Examples 1 to 9. In addition, "DTUL" in Tables 2-1 to 2-7 means the above-mentioned deflection temperature under load.

[0135] In Examples 1 to 43, the evaluation results of tracking resistance, mechanical strength, flame retardancy, and heat resistance were obtained as shown in Tables 2-1 to 2-6. In particular, the CTI values ​​shown in Tables 2-1 to 2-6 were obtained as the evaluation results of tracking resistance in each of Examples 1 to 43. In all of Examples 1 to 43, the CTI value was 400V or more. In particular, in Examples 1 to 8 and 11 to 43, the CTI value was 550V or more, and among them, in Examples 2 to 4, 7, 8, 11 to 18, 21, 23 to 27, and 29 to 43, the CTI value was 575V or more. In addition, as the evaluation results of mechanical strength in each of Examples 1 to 43, the values ​​of tensile strength and tensile breaking strain shown in Tables 2-1 to 2-6 were obtained. In particular, the tensile strength was 59MPa or more in all of Examples 1 to 43, and among them, it was 60MPa or more in Examples 1 to 42. From the above, in all of Examples 1 to 43, it was possible to achieve both high tracking resistance, i.e., a CTI value of ≧400 V, and high mechanical strength, i.e., a tensile strength of ≧59 MPa.

[0136] In addition, in the evaluation results of flame retardancy, only Example 6, in which the PPE resin composition does not contain a flame retardant auxiliary (f) (any of the components (f-1) to (f-6)), and Example 28, in which the PPE resin composition does not contain a flame retardant (e) (any of the components (e-1) and (e-2)), were "NG" among Examples 1 to 43. However, all of the other Examples 1 to 5, 7 to 27, and 29 to 43 met the grade "V-1" based on the UL94V test. Among them, Examples 18, 29, 30, and 40 to 42 met the grade "V-0". In addition, the DTUL shown in Tables 2-1 to 2-6 was obtained as the evaluation result of heat resistance in each of Examples 1 to 43. In all of Examples 1 to 43, the DTUL was 100°C or higher, and excellent heat resistance was maintained.

[0137] On the other hand, as shown in Table 2-7, the PPE-based resin composition of Comparative Example 1 is a resin composition containing polypropylene homopolymer (c) (component (c-2)) but not containing inorganic filler (d). In such Comparative Example 1, the CTI value indicating tracking resistance was 400V or more, but the tensile strength indicating mechanical strength was less than 59MPa. In addition, the PPE-based resin composition of Comparative Example 8 is a resin composition containing more than 20 parts by mass of polypropylene homopolymer (c) (component (c-2)). In such Comparative Example 8, the CTI value indicating tracking resistance was 400V or more, but the tensile strength indicating mechanical strength was less than 59MPa. In addition, the PPE-based resin composition of Comparative Example 9 is a resin composition containing polypropylene homopolymer (c) in an amount of 20 parts by mass or less, but more than 25 parts by mass of inorganic filler (d) (component (d-1)). In such Comparative Example 9, the tensile strength indicating mechanical strength was 59MPa or more, but the CTI value indicating tracking resistance was less than 400V.

[0138] Furthermore, as shown in Table 2-7, the PPE resin compositions of Comparative Examples 2 to 7 are resin compositions containing polyolefins (x) (components (x-1) to (x-6)) rather than polypropylene homopolymer (c). These Comparative Examples 2 to 7 correspond to at least one of "CTI value less than 400 V" and "tensile strength less than 59 MPa", and were unable to achieve both high tracking resistance of CTI value ≧400 V and high mechanical strength of tensile strength ≧59 MPa.

[0139] In addition, the evaluation results of flame retardancy were satisfactory for Comparative Examples 1 to 4, 6, and 7 as grade "V-1" based on the UL94V test, but were "NG" for Comparative Examples 5, 8, and 9. In the evaluation results of heat resistance, the DTUL was 100°C or higher for Comparative Examples 2 to 9, but the DTUL for Comparative Example 1 was less than 100°C.

[0140] [Table 2-1]

[0141] [Table 2-2]

[0142] [Table 2-3]

[0143] [Table 2-4]

[0144] [Table 2-5]

[0145] [Table 2-6]

[0146] [Table 2-7]

[0147] The present invention is not limited to the above-described embodiment and examples, and includes configurations in which the above-described components are appropriately combined. In addition, other embodiments, examples, and operational techniques made by those skilled in the art based on the above-described embodiment are all included in the scope of the present invention. [Industrial Applicability]

[0148] The PPE resin composition according to the present invention is capable of achieving both high mechanical strength and high tracking resistance, and can therefore be suitably used for various molded articles such as battery unit casings.

Claims

1. the composition contains, per 100 parts by mass of a polyphenylene ether-containing resin (A) containing a polyphenylene ether-based resin (a) or the polyphenylene ether-based resin (a) and a styrene-based resin (b), 2 to 20 parts by mass of a polypropylene homopolymer (c) and 1 to 25 parts by mass of an inorganic filler (d) (wherein the inorganic filler (d) is excluding the flame retardant (e), the flame retardant auxiliary (f), a heat stabilizer other than the phosphorus-based stabilizer (g), the black pigment (h), and the white pigment (i), and the flame retardant (e) is excluding the flame retardant auxiliary (f)); The content of glass fiber in 100 mass% of the inorganic filler (d) is 25 mass% or more; A polyphenylene ether resin composition comprising:

2. The mass ratio of the inorganic filler (d) to the polypropylene homopolymer (c) is 0.5 to 3.0; The polyphenylene ether resin composition according to claim 1 .

3. The melt flow rate of the polypropylene homopolymer (c), as measured in accordance with JIS K7210, is 3 to 40 g / 10 min under the measurement conditions of a temperature of 230° C. and a load of 2.16 kg. The polyphenylene ether resin composition according to claim 1 or 2.

4. The composition further contains 5 to 35 parts by mass of a flame retardant (e) relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The polyphenylene ether resin composition according to claim 1 or 2.

5. The flame retardant (e) is a phosphate ester flame retardant. The polyphenylene ether resin composition according to claim 4 .

6. The composition further contains 0.5 to 50 parts by mass of a flame retardant auxiliary (f) relative to 100 parts by mass of the polyphenylene ether-containing resin (A). The polyphenylene ether resin composition according to claim 1 or 2.

7. The flame retardant auxiliary (f) includes at least one selected from an alkaline earth metal salt, a metal hydroxide, a nitrogen-containing compound, an inorganic acid metal compound, and a layered double hydroxide. The polyphenylene ether resin composition according to claim 6 .

8. The flame retardant synergist (f) is calcium carbonate. The polyphenylene ether resin composition according to claim 6 .

9. The inorganic filler (d) is at least one selected from glass fiber, mica, and talc; The polyphenylene ether resin composition according to claim 1 or 2.

10. In 100 mass% of the polyphenylene ether-containing resin (A), the content of the polyphenylene ether-based resin (a) is 55 to 100 mass%, and the content of the styrene-based resin (b) is 0 to 45 mass%. The polyphenylene ether resin composition according to claim 1 or 2.

11. In 100 mass% of the polyphenylene ether-containing resin (A), the content of the polyphenylene ether-based resin (a) is 90 to 100 mass%, and the content of the styrene-based resin (b) is 0 to 10 mass%. The polyphenylene ether resin composition according to claim 1 or 2.

12. Further containing 0.1 to 20 parts by mass of a phosphorus-based stabilizer (g) relative to 100 parts by mass of the polyphenylene ether-containing resin (A); The polyphenylene ether resin composition according to claim 11 .

13. The phosphorus-based stabilizer (g) includes at least one of a phosphite-based compound and a phosphonite-based compound. The polyphenylene ether resin composition according to claim 12 .

14. Further containing 0.01 to 2.0 parts by mass of a black pigment (h) relative to 100 parts by mass of the polyphenylene ether-containing resin (A); The polyphenylene ether resin composition according to claim 1 or 2.

15. The CTI value measured in accordance with IEC 60112 is 400V or more. The tensile strength measured in accordance with ISO 527 is 60 MPa or more. The polyphenylene ether resin composition according to claim 1 or 2.

16. The polyphenylene ether resin composition according to claim 1 or 2, A molded article characterized by:

17. A battery unit housing.

17. The molded article according to claim 16.

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