Polyphenylene ether-based resin composition

Abstract

The present invention aims to provide a polyphenylene ether-based resin composition which is excellent in heat aging resistance in the vicinity of 110°C to 140°C, and has a balance of rigidity and toughness and a good molded appearance. The polyphenylene ether-based resin composition of the present invention is characterized in that it contains a polyphenylene ether (A), an antioxidant (C), a metal oxide and / or a metal sulfide (D), and a lubricant (E), and optionally a styrene-based resin (B), and the mass ratio of each component is: the (A) component 10 to 95 mass parts, the (B) component 0 to 80 mass parts, the (C) component 0.05 to 3 mass parts, the total of the (D) component and the (E) component 0.1 to 3.5 mass parts, and the mass ratio of the (D) component to the (E) component is (D) component / (E) component = 80 / 20 to 55 / 45, with respect to the total of 100 mass parts of the above-mentioned (A) component, the above-mentioned (B) component, the above-mentioned (C) component, the above-mentioned (D) component, and the above-mentioned (E) component.

Description

Technical Field

[0001] This invention relates to polyphenylene ether-based resin compositions. Background Technology

[0002] Polyphenylene ether (PPE) resins are mostly formulated by blending PPE and styrene resins in any proportion to achieve the desired heat resistance and molding flowability. Sometimes, elastomer components, flame retardants, inorganic fillers, heat stabilizers, and other additives are further added as needed to create resin compositions. PPE resins exhibit excellent heat resistance, mechanical properties, molding processability, acid and alkali resistance, dimensional stability, and electrical properties, making them widely used in home appliances, office equipment, information equipment, and the automotive industry.

[0003] In recent years, polyphenylene ether resin compositions have been studied for applications such as molded articles used in projectors, various lighting fixtures, and thin-walled automotive parts. However, parts used in such applications often require sufficient mechanical strength to be maintained even when exposed to high temperatures for extended periods.

[0004] As a technique for improving the high-temperature aging (long-term high-temperature exposure) properties of polyphenylene ether resin compositions, a technique is disclosed that suppresses the generation of unmelted material caused by the oxidative degradation of polyphenylene ether after high-temperature aging by blending with a specific aromatic vinyl resin (for example, see Patent Document 1).

[0005] In addition, a technique involving the following resin composition is disclosed, which improves high-temperature aging properties by reacting the side chains and terminal methyl and / or terminal OH groups of polyphenylene ether with a compound such as 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 8-199060

[0009] Patent Document 2: International Publication No. 2017 / 119017 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] However, when existing polyphenylene ether resin molded articles are subjected to high-temperature aging (long-term heat exposure) tests at temperatures of around 110℃ to 140℃, mechanical properties such as tensile strength are significantly reduced, so the existing technology may not always be sufficient.

[0012] Even the resin compositions disclosed in Patent Documents 1 and 2, although they can maintain sufficient mechanical properties in aging tests at temperatures above 150°C, may not always maintain sufficient mechanical properties at test temperatures below 150°C, especially at test temperatures of 110°C to 140°C.

[0013] The reason for this is speculated to be that, under aging tests at temperatures above 150°C, the oxidative thermal degradation of the surface layer of the molded product proceeds rapidly, forming a barrier layer on the surface to prevent oxidation from penetrating inwards. Therefore, oxygen is less likely to penetrate into the interior of the molded product during subsequent oxidation, and the internal oxidation degradation proceeds relatively slowly. On the other hand, under temperature conditions below 150°C, especially around 110°C to 140°C, the oxidative thermal degradation of the surface layer of the molded product does not proceed rapidly, and it is difficult for an oxidation barrier layer to form on the surface. Therefore, oxygen penetrates into the interior of the molded product, causing oxidation degradation, and as a result, the decrease in mechanical properties occurs more rapidly in a short period of time.

[0014] Improving the heat aging resistance of polyphenylene ether resins in the temperature range of 110℃ to 140℃ is extremely difficult. Improving the heat aging resistance in this temperature range is an important issue for materials used at higher temperatures, such as internal components of home appliances, office equipment, or internal components around automobile engines.

[0015] Therefore, the purpose of this invention is to provide a polyphenylene ether resin composition that exhibits excellent heat aging resistance around 110°C to 140°C, while maintaining the balance of rigidity and toughness and good molding appearance inherent in polyphenylene ether resins without damage.

[0016] Methods for solving problems

[0017] In order to solve the above-mentioned problems, the inventors conducted in-depth research and found that by mixing a specific amount of antioxidant, metal oxide and / or metal sulfide with a specific lubricant in polyphenylene ether, and then adjusting the mass ratio of the metal oxide and / or metal sulfide to the lubricant to a specific range, the heat aging resistance under temperature conditions of around 110°C to 140°C can be improved, and the target resin composition can be obtained, thereby providing the present invention.

[0018] That is, the present invention is as follows. [1]

[0020] A polyphenylene ether-based resin composition, characterized in that it contains:

[0021] Polyphenylene ether (A);

[0022] Antioxidant (C);

[0023] Metal oxides and / or metal sulfides (D); and

[0024] Lubricant (E), which is at least one selected from the group consisting of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts.

[0025] It may also optionally contain styrene-based resin (B).

[0026] Relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E) above, the mass proportion of each component is as follows:

[0027] (A) Components: 10 to 95 parts by weight

[0028] (B) Components: 0-80 parts by weight

[0029] (C) Component 0.05 parts by weight to 3 parts by weight,

[0030] The total amount of components (D) and (E) is 0.1 to 3.5 parts by weight.

[0031] The mass ratio of component (D) to component (E) is (D) / (E) = 80 / 20 to 55 / 45. [2]

[0033] The polyphenylene ether resin composition as described in [1], wherein the inorganic filler accounts for less than 15% by mass relative to 100% by mass of the polyphenylene ether resin composition. [3]

[0035] The polyphenylene ether resin composition as described in [2], wherein the inorganic filler is present in a mass ratio of 4% or less. [4]

[0037] The polyphenylene ether resin composition as described in any one of [1] to [3], wherein the above-mentioned component (C) is an antioxidant with a melting point of 180°C or higher. [5]

[0039] The polyphenylene ether resin composition as described in any one of [1] to [4], wherein the proportion of aromatic phosphate flame retardant and / or phosphazene flame retardant in 100% by mass of the polyphenylene ether resin composition is less than 5% by mass. [6]

[0041] The polyphenylene ether resin composition as described in any one of [1] to [5], wherein the above-mentioned component (C) is a phosphorus-based antioxidant. [7]

[0043] The polyphenylene ether resin composition as described in any one of [1] to [6], wherein the above-mentioned component (D) comprises at least one selected from the group consisting of titanium oxide, zinc oxide and zinc sulfide. [8]

[0045] The polyphenylene ether resin composition as described in any one of [1] to [7], wherein the total mass ratio of the above-mentioned components (C), (D) and (E) is 4 parts by mass or less relative to a total of 100 parts by mass of the above-mentioned components (A), (B), (C), (D) and (E). [9]

[0047] The polyphenylene ether resin composition as described in any one of [1] to [8] further contains a styrene-based thermoplastic elastomer (F).

[0048] The mass ratio of component (F) is 0.1 to 25 parts by mass relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E) above.

[10]

[0050] The polyphenylene ether resin composition as described in [9], wherein the total mass percentage of the above-mentioned component (A), component (B), component (C), component (D), component (E) and component (F) is 85% or more relative to 100% by mass of the above-mentioned polyphenylene ether resin composition.

[11]

[0052] The polyphenylene ether resin composition as described in any one of [1] to

[10] , wherein the mass ratio of the polyolefin resin is 5% or less relative to 100% by mass of the above polyphenylene ether resin composition.

[12]

[0054] The polyphenylene ether resin composition as described in any one of [1] to

[11] retains more than 90% of its tensile strength after aging at 130°C for 500 hours.

[13]

[0056] A method for manufacturing a polyphenylene ether resin composition, which is a method for manufacturing the polyphenylene ether resin composition described in any one of [1] to

[12] , characterized in that,

[0057] The process includes the melt-blending of components (A), (C), (D), and (E), as well as optional components (B), (F), and / or other materials.

[0058] In the above-mentioned melt mixing process, a substance formed by pre-mixing the above-mentioned component (D) and component (E) is used as a raw material.

[0059] The effects of the invention

[0060] According to the present invention, a polyphenylene ether resin composition can be provided, which exhibits excellent heat aging resistance at around 110°C to 140°C, while maintaining the balance of rigidity and toughness inherent in polyphenylene ether resins without damage. Detailed Implementation

[0061] The following provides a detailed description of specific embodiments of the present invention (hereinafter referred to as "this embodiment"). The present invention is not limited to the following description and can be implemented with various modifications within the scope of its key points.

[0062] [Resin Composition]

[0063] The polyphenylene ether-based resin composition of this embodiment contains polyphenylene ether (A), an antioxidant (C), a metal oxide and / or metal sulfide (D), and a lubricant (E) selected from the group consisting of higher fatty acid amides, higher fatty acid bisamides, and higher fatty acid metal salts. It also optionally contains a styrene-based resin (B). Relative to a total of 100 parts by weight of the above-mentioned components (A), (B), (C), (D), and (E), the mass ratio of each component is as follows: (A) 10 to 95 parts by weight, (B) 0 to 80 parts by weight, (C) 0.05 to 3 parts by weight, and the total of (D) and (E) 0.1 to 3.5 parts by weight. The mass ratio of the above-mentioned components (D) and (E) in the polyphenylene ether-based resin composition is in the range of (D) / (E) = 85 / 15 to 55 / 45.

[0064] It should be noted that in this specification, the above-mentioned polyphenylene ether resin composition is sometimes simply referred to as "resin composition". In addition, polyphenylene ether (A) is sometimes referred to as "(A) component", styrene resin (B) as "(B) component", antioxidant (C) as "(C) component", metal oxide and / or metal sulfide (D) as "(D) component", and lubricant (E) which is at least one selected from the group consisting of higher fatty acid amides, higher fatty acid diamides and higher fatty acid metal salts is referred to as "(E) component".

[0065] (Polyphenylene ether (A))

[0066] The polyphenylene ether (A) contained in the polyphenylene ether-based resin composition of this embodiment is preferably a homopolymer or copolymer having repeating units (structural units) represented by the following chemical formula (1) and / or repeating units (structural units) represented by chemical formula (2).

[0067]

Chemistry 1

[0068]

[0069]

Chemistry 2

[0070]

[0071] In the above chemical formulas (1) and (2), R1, R2, R3, R4, R5, and R6 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 9 carbon atoms, or a halogen atom. R5 and R6 are not both hydrogen atoms. Furthermore, the preferred number of carbon atoms for the alkyl group is 1 to 3, and the preferred number of carbon atoms for the aryl group is 6 to 8. R1, R2, R3, R4, R5, and R6 each independently preferably have a hydrogen atom and an alkyl group having 1 to 4 carbon atoms (preferably an alkyl group having 1 to 3 carbon atoms), more preferably an alkyl group having 1 to 4 carbon atoms (preferably an alkyl group having 1 to 3 carbon atoms).

[0072] It should be noted that the number of repeating units represented by the above chemical formulas (1) and (2) varies depending on the molecular weight distribution of polyphenylene ether (A), and therefore is not particularly limited.

[0073] Representative examples of homopolymers of polyphenylene ethers include poly(2,6-dimethyl-1,4-phenylene) ether, poly(2-methyl-6-ethyl-1,4-phenylene) ether, poly(2,6-diethyl-1,4-phenylene) ether, poly(2-ethyl-6-n-propyl-1,4-phenylene) ether, poly(2,6-di-n-propyl-1,4-phenylene) ether, poly(2-methyl-6-n-butyl-1,4-phenylene) ether, poly(2-ethyl-6-isopropyl-1,4-phenylene) ether, poly(2-methyl-6-chloroethyl-1,4-phenylene) ether, poly(2-methyl-6-hydroxyethyl-1,4-phenylene) ether, and poly(2-methyl-6-chloroethyl-1,4-phenylene) ether.

[0074] Examples of polyphenylene ether copolymers include, but are not limited to, copolymers of 2,6-dimethylphenol and 2,3,6-trimethylphenol, copolymers of 2,6-dimethylphenol and o-cresol, and copolymers of 2,3,6-trimethylphenol and o-cresol, which are copolymers in which the polyphenylene ether structure represented by chemical formula (1) and / or chemical formula (2) is the main repeating unit.

[0075] It should be noted that, in this embodiment, the polyphenylene ether chain preferably contains at least a portion of the structure in which R1 and R2 in chemical formula (1) are methyl groups (and the structure derived from this structure as described below). Poly(2,6-dimethyl-1,4-phenylene) ether is preferred.

[0076] The various polyphenylene ethers (A) mentioned above can be used alone or in combination of two or more.

[0077] In the above-mentioned polyphenylene ether (A), from the viewpoint of having sufficient affinity with the metal oxides and metal sulfides that are components (D), the concentration of terminal OH groups is preferably 0.4 to 2.0 per 100 monomer units constituting the polyphenylene ether, more preferably 0.6 to 1.3 per 100 monomer units.

[0078] It should be noted that the concentration of terminal OH groups in polyphenylene ether (A) can be calculated by NMR measurement.

[0079] In polyphenylene ether (A), as long as it does not excessively reduce the heat resistance of the resin composition, it may also contain various other phenylene ether units other than those of the above general formulas (1) and (2) as part of the structure of the polyphenylene ether.

[0080] Other than the chemical formulas (1) and (2) mentioned above, examples of various phenylene ether units include, but are not limited to, the 2-(dialkylaminomethyl)-6-methylphenylene ether unit and the 2-(N-alkyl-N-phenylaminomethyl)-6-methylphenylene ether unit described in Japanese Patent Application Publication No. 01-297428 and Japanese Patent Application Publication No. 63-301222.

[0081] Polyphenylene ether (A) may contain biphenyl quinone and other compounds in its main chain.

[0082] Furthermore, polyphenylene ether (A) can be converted into a functionalized polyphenylene ether by reacting (modifying) a portion or all of the structural units constituting the polyphenylene ether with a functionalizing agent comprising one or more functional groups selected from the group consisting of carboxyl, anhydride, amide, imide, amino, orthoester, hydroxyl and groups derived from ammonium carboxylates.

[0083] Especially when inorganic fillers are mixed, functionalized polyphenylene ether (A) is preferred in terms of improving the tightness with inorganic fillers, improving heat resistance and mechanical properties. A portion or all of the polyphenylene ether is functionalized to react with anhydrides such as maleic anhydride or carboxylic acids such as malic acid, citric acid and fumaric acid.

[0084] In the above-mentioned polyphenylene ether (A), from the perspective of further improving the affinity with component (D), the concentration of the functionalized modified end is preferably 0.1 to 10 per 100 monomer units constituting the polyphenylene ether, more preferably 0.1 to 3.0 per 100 monomer units, and even more preferably 0.1 to 1.0 per 100 monomer units constituting the polyphenylene ether.

[0085] It should be noted that the modified end concentration of polyphenylene ether (A) can be calculated by NMR determination.

[0086] The ratio of the weight-average molecular weight Mw to the number-average molecular weight Mn of polyphenylene ether (A) (Mw / Mn value) is preferably 2.0 to 5.5, more preferably 2.5 to 4.5, and even more preferably 3.0 to 4.5.

[0087] The Mw / Mn value is preferably 2.0 or higher from the perspective of the molding processability of the resin composition, and preferably 5.5 or lower from the perspective of the mechanical properties of the resin composition.

[0088] In addition, from the perspective of molding processability and mechanical properties, the number average molecular weight Mn of polyphenylene ether (A) is preferably 8,000 to 28,000, more preferably 12,000 to 24,000, and even more preferably 14,000 to 22,000.

[0089] Here, the weight-average molecular weight Mw and number-average molecular weight Mn are obtained from the converted molecular weight of polystyrene based on GPC (gel permeation chromatography).

[0090] The specific viscosity of polyphenylene ether (A) is preferably in the range of 0.25 dl / g to 0.65 dl / g. More preferably, it is in the range of 0.30 dl / g to 0.55 dl / g, and even more preferably, it is in the range of 0.33 dl / g to 0.42 dl / g.

[0091] Regarding the specific viscosity of polyphenylene ether (A), it is preferably 0.25 dl / g or more from the perspective of sufficient mechanical properties, and preferably 0.65 dl / g or less from the perspective of molding and processability.

[0092] It should be noted that the specific viscosity can be measured using an Ubbelohde viscometer with a 0.5 g / dL chloroform solution at 30°C.

[0093] Polyphenylene ether (A) is typically available in powder form, with a preferred particle size of 1 μm to 1000 μm, more preferably 10 μm to 700 μm, and particularly preferably 100 μm to 500 μm. From a processability perspective, a particle size of 1 μm or larger is preferred, and a particle size of 1000 μm or smaller is preferred to suppress the formation of unmelted material during melt mixing.

[0094] In the resin composition of this embodiment, the mass ratio of polyphenylene ether (A) is in the range of 10 to 95 parts by mass, preferably 10 to 90 parts by mass, more preferably 40 to 90 parts by mass, and even more preferably 40 to 80 parts by mass, relative to a total of 100 parts by mass of polyphenylene ether (A), styrene-based resin (B), antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of at least one higher fatty acid amide, higher fatty acid diamide, and higher fatty acid metal salt.

[0095] Regarding the content of polyphenylene ether, from the perspective of imparting sufficient heat resistance, it is preferably 10 parts by weight or more. Furthermore, from the perspective of further imparting heat resistance (e.g., heat resistance at temperatures of 130°C or higher) and mechanical properties, it is more preferably 40 parts by weight or more. From the perspective of molding processability and mold appearance retention, it is preferably 95 parts by weight or less.

[0096] (Styrene-based resin (B))

[0097] In the resin composition of this embodiment, styrene-based resin (B) may be blended in primarily to improve molding flowability.

[0098] In this embodiment, styrene-based resin (B) refers to homopolymers of styrene-based compounds, copolymers (preferably random copolymers) of styrene-based compounds and compounds capable of copolymerizing with styrene-based compounds (excluding conjugated diene compounds). This component (B) does not include components included in the scope of component (F) described later.

[0099] The above-mentioned component (B) can be used alone or in combination of two or more.

[0100] Specific examples of the aforementioned styrene compounds include styrene, α-methylstyrene, 2,4-dimethylstyrene, monochlorostyrene, p-methylstyrene, p-tert-butylstyrene, and ethylstyrene.

[0101] In addition, compounds that can copolymerize with styrene-based compounds include methacrylates such as methyl methacrylate and ethyl methacrylate; unsaturated nitrile compounds such as acrylonitrile and methacrylonitrile; and acid anhydrides such as maleic anhydride.

[0102] Styrene-based resins (B) can be obtained by polymerizing styrene-based compounds or styrene-based compounds and compounds capable of copolymerizing with styrene-based compounds in the presence or absence of rubbery polymers.

[0103] Here, examples of rubbery polymers include conjugated diene rubbers or their hydrides, copolymers of conjugated dienes and aromatic vinyl compounds or their hydrides, and ethylene-propylene copolymer rubbers.

[0104] In this embodiment, polystyrene or high-impact polystyrene reinforced with a rubbery polymer is preferred as the styrene-based resin (B), and polystyrene is even more preferred.

[0105] In the resin composition of this embodiment, the mass proportion of styrene resin (B) is in the range of 0 to 80 parts by mass relative to a total of 100 parts by mass of polyphenylene ether (A), styrene-based resin (B), antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of at least one of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts. Preferably, it is in the range of 10 to 60 parts by mass, more preferably 20 to 50 parts by mass.

[0106] Regarding the mass ratio of styrene-based resin (B), from the perspective of imparting sufficient molding fluidity, it is preferable to mix more than 0 parts by mass, and from the perspective of maintaining sufficient heat resistance, it is preferable to mix less than 80 parts by mass.

[0107] (Antioxidant (C))

[0108] Antioxidants (C) can be used alone or in combination of two or more.

[0109] The antioxidant (C) mentioned above can be either a primary antioxidant that acts as a free radical chain inhibitor, or a secondary antioxidant that decomposes peroxides. That is, by using an antioxidant, when polyphenylene ether is exposed to high temperatures for a long time, it is possible to capture free radicals that may be generated at the terminal methyl or side chain methyl groups (primary antioxidant), or to decompose peroxides generated at the terminal methyl or side chain methyl groups due to the action of such free radicals (secondary antioxidant), thereby preventing the oxidative crosslinking of polyphenylene ether.

[0110] As primary antioxidants, hindered phenolic antioxidants can be mainly used, such as 2,6-di-tert-butyl-4-methylphenol, pentaerythritol tetra[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], n-octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate, 2-[1 -(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate, 4,4'-butylenebis(3-methyl-6-tert-butylphenol), alkylated bisphenols, tetra[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane, 3,9-bis[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl]-2,4,8,10-tetraoxyspiro[5,5]undecane, etc.

[0111] As secondary antioxidants, phosphorus-based antioxidants are mainly used. Specific examples of phosphorus-based antioxidants include trinonylphenyl phosphite, triphenyl phosphite, tris(2,4-di-tert-butylphenyl) phosphite, bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, and 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane, etc., which are phosphite-based antioxidants.

[0112] From the perspective of improving long-term heat aging resistance, the melting point of the antioxidant (C) used in this embodiment is preferably 180°C or higher, more preferably 200°C to 310°C, and even more preferably 220°C to 270°C.

[0113] It should be noted that the above melting point can be determined using a melting point measuring instrument of model B-545 (manufactured by Shibata Scientific Co., Ltd.) based on the light transmission method according to JIS K 0064, as the melting endpoint temperature.

[0114] In addition, from the perspective of further improving the aging characteristics after long-term high-temperature exposure, phosphorus-based antioxidants are preferred as secondary antioxidants, and phosphite-based antioxidants are even more preferred.

[0115] In the resin composition of this embodiment, the mass ratio of antioxidant (C) is in the range of 0.05 parts by mass to 3 parts by mass relative to a total of 100 parts by mass of polyphenylene ether (A), styrene-based resin (B), antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of at least one of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts. Preferably, it is in the range of 0.1 parts by mass to 2 parts by mass, more preferably in the range of 0.2 parts by mass to 1 part by mass.

[0116] From the perspective of improving heat aging resistance, the mass ratio of antioxidant (C) is preferably 0.05 parts by mass or more, and from the perspective of preventing mold contamination and maintaining the appearance of the molded product, it is preferably 3 parts by mass or less.

[0117] (Metal oxides, metal sulfides (D))

[0118] Examples of metal oxides and / or metal sulfides (D) contained in the polyphenylene ether resin composition of this embodiment include, for example, titanium oxide, zinc oxide, zinc sulfide, magnesium oxide, aluminum oxide, barium oxide, calcium oxide, molybdenum oxide, etc.

[0119] In the resin composition of this embodiment, titanium oxide, zinc oxide, and zinc sulfide are preferred.

[0120] The above-mentioned component (D) can be used alone or in combination of two or more.

[0121] In the resin composition of this embodiment, the average primary particle size of component (D) is preferably in the range of 0.01 μm to 1 μm. More preferably, it is 0.05 μm to 0.5 μm, and even more preferably, it is 0.1 μm to 0.4 μm. From the viewpoint of improving long-term aging characteristics, it is preferably 0.01 μm or more, and more preferably 1 μm or less.

[0122] In the resin composition of this embodiment, relative to a total of 100 parts by weight of polyphenylene ether (A), styrene-based resin (B), antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of at least one of higher fatty acid amides, higher fatty acid bisamides, and higher fatty acid metal salts, the mass ratio of metal oxide and / or metal sulfide (D) is preferably in the range of 0.05 parts by weight to 3 parts by weight, more preferably 0.1 parts by weight to 2 parts by weight, and even more preferably in the range of 0.2 parts by weight to 1.5 parts by weight. From the perspective of improving heat aging resistance, it is preferably 0.05 parts by weight or more, and from the perspective of maintaining mechanical properties and molded appearance, it is preferably 3 parts by weight or less.

[0123] (Lubricant (E))

[0124] The lubricant (E) contained in the polyphenylene ether resin composition of this embodiment is at least one selected from the group consisting of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts.

[0125] The higher fatty acid (bis)amide used in the resin composition of this embodiment is an amide of higher fatty acids or a bisamide of higher fatty acids, preferably a compound obtained by the dehydration reaction of higher fatty acids and / or polyacids with diamines.

[0126] As a high-grade fatty acid, saturated aliphatic monocarboxylic acids with 16 or more carbon atoms (e.g., 16 to 30 carbon atoms) are preferred from the perspective of preventing coking and overflow. Specifically, examples include palmitic acid, stearic acid, oleic acid, erucic acid, behenic acid, and linalic acid.

[0127] As polycarboxylic acids, examples include carboxylic acids that are dicarboxylic acids or higher, such as aliphatic dicarboxylic acids like malonic acid, succinic acid, adipic acid, sebacic acid, pimelic acid, and azelaic acid; aromatic dicarboxylic acids like phthalic acid and terephthalic acid; alicyclic dicarboxylic acids like cyclohexyl dicarboxylic acid and cyclohexylsuccinic acid; and so on.

[0128] Examples of diamines include ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, hexamethylenediamine, m-phenylenediamine, toluenediamine, p-phenylenediamine, phenylenediamine, and isophoronediamine.

[0129] As higher fatty acid amides, examples include stearamide, behenamide, and lycamide.

[0130] Examples of higher fatty acid bisamides include those obtained by reacting the aforementioned higher fatty acids with an aliphatic diamine having 1 to 10 carbon atoms (preferably 1 to 6 carbon atoms), such as methylene bisstearamide and ethyl bisstearamide.

[0131] Among these, stearamide and ethylene bis-stearamide are preferred in terms of preventing coking and overflow.

[0132] These higher fatty acid (bis)amides can be used alone or in combination of two or more. Alternatively, they can be used in any proportion with the higher fatty acid metal salts described later.

[0133] For the higher fatty acid metal salt used in the resin composition of this embodiment, the higher fatty acid with 10 to 30 carbon atoms (preferably 14 to 24) is preferred as the higher fatty acid because it has low volatility and high effectiveness in preventing charring and overflow.

[0134] Specific examples of higher fatty acids include hexanoic acid, decanoic acid, lauric acid, palmitic acid, stearic acid, behenic acid, limonic acid, oleic acid, and linoleic acid, with stearic acid, behenic acid, and limonic acid being preferred.

[0135] Examples of metal salts include alkali metal salts such as potassium and sodium salts of these higher fatty acids, alkaline earth metal salts such as calcium and magnesium salts, and zinc salts.

[0136] Specific examples of higher fatty acid metal salts include calcium stearate, sodium stearate, magnesium stearate, zinc stearate, calcium oleate, sodium oleate, calcium palmitate, and sodium palmitate.

[0137] Among these, zinc stearate, magnesium stearate, and calcium stearate are preferred.

[0138] These higher fatty acid metal salts can be used alone or in combination of two or more. Alternatively, they can be used in combination with the aforementioned higher fatty acid amides and higher fatty acid diamides.

[0139] In the resin composition of this embodiment, the mass ratio of lubricant (E) is preferably in the range of 0.015 parts by mass to 1.60 parts by mass relative to a total of 100 parts by mass of polyphenylene ether (A), styrene-based resin (B), antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts. More preferably, it is in the range of 0.02 parts by mass to 1 part by mass, and even more preferably, it is in the range of 0.05 parts by mass to 0.5 parts by mass. From the perspective of improving heat aging resistance, it is preferably 0.015 parts by mass or more, and from the perspective of preventing mold contamination and maintaining the molded appearance, it is preferably 1.60 parts by mass or less.

[0140] Regarding the total mass ratio of the metal oxide and / or metal sulfide (D) in the resin composition of this embodiment to the lubricant (E), which is at least one selected from the group consisting of higher fatty acid amides, higher fatty acid bisamides, and higher fatty acid metal salts, it is in the range of 0.1 to 3.5 parts by mass relative to a total of 100 parts by mass of the above-described components (A), (B), (C), (D), and (E). Preferably, it is 0.15 to 3 parts by mass, more preferably 0.25 to 2 parts by mass. From the viewpoint of sufficiently improving heat aging resistance, it is 0.1 parts by mass or more; from the viewpoint of maintaining the mechanical properties and appearance of the molded article, it is preferably 3.5 parts by mass or less.

[0141] The total mass ratio of the above-described components (A), (B), (C), (D), and (E) in the resin composition of this embodiment is preferably 80 parts by mass or more, more preferably 85 parts by mass or more, and can be 100 parts by mass or less, or 98 parts by mass or less.

[0142] In this embodiment, the mass ratio of component (D) to component (E) in the resin composition is in the range of (D) / (E) = 80 / 20 to 55 / 45. Preferably, it is in the range of 80 / 20 to 60 / 40, more preferably in the range of 80 / 20 to 65 / 35. From the perspective of maintaining the appearance and toughness of the molded article and its resistance to heat aging, it is preferable to have a content ratio within the range of (D) / (E) = 80 / 20 to 55 / 45.

[0143] The components (D) and (E) described above may be added separately during the melt blending of the composition (for example, during the melt blending process of the components (A), (C), (D), and (E), as well as optional components (B), (F) and / or other materials described later), for example, during melt blending using a twin-screw extruder described later. However, from the perspective of maintaining the appearance and toughness of the molded article and its resistance to heat aging, it is preferable to use a substance that has been pre-mixed with the components (D) and (E) using a Henschel mixer or the like as a raw material.

[0144] Furthermore, regarding the total mass ratio of the antioxidant (C), metal oxide and / or metal sulfide (D), and lubricant (E) selected from the group consisting of at least one of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts in the resin composition of this embodiment, from the perspective of maintaining the appearance of the molded article and maintaining the balance of physical properties, it is preferably 4 parts by mass or less relative to the total of 100 parts by mass of the above-mentioned components (A), (B), (C), (D), and (E).

[0145] (Styrene-based thermoplastic elastomers (F))

[0146] The styrene-based thermoplastic elastomer (F) used in this embodiment refers to a block copolymer having styrene blocks and conjugated diene compound blocks.

[0147] In the aforementioned conjugated diene block, from the perspective of thermal stability, hydrogenation is preferably carried out at a hydrogenation rate of at least 50%. A hydrogenation rate of at least 80%, and even more preferably at least 95%, is preferred.

[0148] Examples of conjugated diene compounds that can be used as blocks include, but are not limited to, polybutadiene, polyisoprene, poly(ethylene-butene), poly(ethylene-propylene), and vinyl-polyisoprene. A single conjugated diene compound block may be used, or two or more may be used in combination.

[0149] The repeating units constituting the block copolymer can be arranged linearly or radially. Furthermore, the block structure composed of polystyrene blocks and rubber interblocks can be type II, type III, or type IV. Among these, from the perspective of maximizing the desired effects of this embodiment, a type III linear block copolymer composed of a polystyrene-poly(ethylene-butene)-polystyrene structure is preferred. It should be noted that the conjugated diene compound blocks may contain butadiene units in a range not exceeding 30% by mass.

[0150] In addition, in the resin composition of this embodiment, the styrene-based thermoplastic elastomer may also be a functionalized styrene-based thermoplastic elastomer incorporating functional groups such as carbonyl or amino groups.

[0151] The styrene content in the styrene-based thermoplastic elastomer (F) is preferably in the range of 20% to 90% by mass, more preferably 50% to 80% by mass, and even more preferably in the range of 60% to 70% by mass. From the perspective of miscibility with components (A) and (B) above, it is preferably 20% by mass or more, and from the perspective of imparting sufficient impact resistance, it is preferably 90% by mass or less.

[0152] The number-average molecular weight (Mn) of the styrene-based thermoplastic elastomer (F) is preferably in the range of 30,000 to 500,000, more preferably 40,000 to 300,000, and even more preferably 45,000 to 250,000. From the viewpoint of imparting sufficient toughness to the molded article, the range of 30,000 to 500,000 is preferred.

[0153] The Mw / Mn value of the above-mentioned component (F), calculated from the weight-average molecular weight Mw and number-average molecular weight Mn obtained by converting the molecular weight from polystyrene, is preferably in the range of 1.0 to 3.0, more preferably 1.0 to 2.0, and even more preferably 1.0 to 1.5. From the perspective of mechanical properties, it is preferably in the range of 1.0 to 3.0.

[0154] The mass ratio of styrene-based thermoplastic elastomer (F) relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E) is preferably 0.1 to 25 parts by mass, more preferably 0.5 to 20 parts by mass, and even more preferably 1 to 15 parts by mass. From the perspective of improving toughness, it is preferably 0.1 parts by mass or more; from the perspective of maintaining the mechanical properties of the molded article, it is preferably 25 parts by mass or less.

[0155] (Other materials)

[0156] In the polyphenylene ether resin composition of this embodiment, polyolefin resins may be further mixed in.

[0157] Examples of polyolefin resins include polyethylene, polypropylene, ethylene-propylene copolymers, ethylene-octene copolymers, ethylene-ethyl acrylate copolymers, and ethylene-ethyl methacrylate copolymers.

[0158] Polyolefin resins can be used alone or in combination with two or more.

[0159] In this embodiment, the mass percentage of the polyolefin resin in the resin composition is preferably 5% by mass or less relative to 100% by mass of the resin composition. More preferably, it is 3% by mass or less, and even more preferably, it is 2% by mass or less. From the perspective of the mechanical properties of the resin composition, the total content of the polyolefin resin and the styrene resin is preferably 5% by mass or less.

[0160] In the resin composition of this embodiment, a flame retardant may be further incorporated.

[0161] Examples of flame retardants include triphenyl phosphate, tricresyl phosphate, tri(xyl) phosphate, toluene diphenyl phosphate, xylyl diphenyl phosphate, di(xyl) phenyl phosphate, bisphenol phosphate, hydroxynonenoic acid phosphate, resorcinol bisphosphate, bisphenol A bisphosphate, and other triphenyl-substituted aromatic phosphate compounds, as well as cyclic phenoxy phosphazene compounds or chain phosphazene compounds, and other phosphazene flame retardants.

[0162] Flame retardants can be used alone or in combination.

[0163] The mass percentage of the flame retardant in the resin composition of this embodiment is preferably 5% by mass or less relative to 100% by mass of the resin composition. More preferably, it is 3% by mass or less, further preferably 2% by mass or less, and particularly preferably 1% by mass or less. From the perspective of maintaining the heat resistance of the resin composition and maintaining the molded appearance, the mass percentage of the flame retardant is preferably 5% by mass or less. From the perspective of the molding residence stability of the resin composition, the content of aromatic phosphate ester flame retardant and / or phosphazene flame retardant in 100% by mass of the resin composition is preferably 5% by mass or less, more preferably 3% by mass or less, further preferably 2% by mass or less, and particularly preferably 1% by mass or less. From the perspective of further improving the molding residence stability of the resin composition, it is preferable that the flame retardant is an aromatic phosphate ester flame retardant and / or phosphazene flame retardant, and the content of aromatic phosphate ester flame retardant and / or phosphazene flame retardant in 100% by mass of the resin composition is 5% by mass or less, more preferably 3% by mass or less, further preferably 2% by mass or less, and particularly preferably 1% by mass or less.

[0164] Furthermore, in the resin composition of this embodiment, ultraviolet absorbers, colorants, mold release agents, etc., may be contained in a proportion of 0.001% to 3% by mass relative to 100% by mass, without significantly reducing heat resistance, mechanical properties, or surface appearance of the molded article. Preferably, the proportion is in the range of 0.01% to 2% by mass, more preferably in the range of 0.2% to 1% by mass.

[0165] From the perspective of fully demonstrating the additive effect, it is preferred to be 0.001% by mass or more, and from the perspective of maintaining physical properties, it is preferred to be 3% by mass or less.

[0166] In the resin composition of this embodiment, inorganic fillers may be mixed in to enhance mechanical properties and impart special characteristics.

[0167] Inorganic fillers that can be used in the resin composition of this embodiment include, but are not limited to, glass fiber, carbon fiber, mica, glass flakes, talc, glass shavings, chlorite, and organic clay.

[0168] Regarding the mass ratio of inorganic filler in the resin composition of this embodiment, from the perspective of maintaining the appearance of the molded article and fully exhibiting the effect of heat aging resistance, it is preferably less than 15% by mass relative to 100% by mass of the resin composition. More preferably, it is less than 11% by mass, even more preferably less than 6% by mass, and even more preferably 4% by mass or less, and particularly preferably 2% by mass or less.

[0169] [Method for manufacturing the resin composition]

[0170] The resin composition of this embodiment can be manufactured by melt-blending the above-described components (A), (C), (D), and (E), as well as the above-described components (B), (F), and / or other materials as needed.

[0171] The method for preparing the resin composition in this embodiment is not limited to the following methods. In order to produce resin compositions in large quantities and stably, a twin-screw extruder is preferred from the perspective of manufacturing efficiency.

[0172] The screw diameter of the twin-screw extruder is preferably in the range of 25 mm to 90 mm. More preferably, it is in the range of 40 mm to 70 mm. For example, the following methods are preferred: melt mixing using a ZSK40MC twin-screw extruder (manufactured by Werner & Pfleiderer GmbH, Germany, with 13 barrels, a screw diameter of 40 mm, and an L / D ratio of 50; with screw configurations of 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N), under conditions of a barrel temperature of 270°C to 330°C, a screw speed of 150 rpm to 600 rpm, and an extrusion rate of 40 kg / h to 300 kg / h; melt mixing using a TEM58SS twin-screw extruder (TOSHIBA). This method describes a melt-blending process using a screw with 13 barrels, a screw diameter of 58 mm, and an L / D ratio of 53 (manufactured by MACHINE; available in screw configurations with 2 kneading discs L, 14 kneading discs R, and 2 kneading discs N), under conditions of a barrel temperature of 270°C to 330°C, a screw speed of 150 rpm to 600 rpm, and an extrusion rate of 250 kg / h to 700 kg / h.

[0173] Here, "L" refers to the "screw and barrel length" of the extruder, and "D" refers to the "screw and barrel diameter".

[0174] Regarding the conditions for manufacturing the resin composition of this embodiment, for example, the resin composition may be manufactured by melt-blending all of the above-described components (A), (C), (D), and (E), as well as components (B), (F), and other materials as needed, but is not limited thereto.

[0175] Furthermore, when using a twin-screw extruder to manufacture the resin composition of this embodiment, components (D) and (E) can be pre-mixed using a Henschel mixer or similar equipment as described above, and used as raw materials. Components (A), (B), (C), and other raw materials are then supplied from the feed port (top feed port) at the uppermost part of the extruder for melt mixing to manufacture the resin composition. Alternatively, inorganic fillers or similar materials can be fed from the barrel side of the extruder midway through the process, and flame retardant materials or similar components can be mixed using a liquid addition device for melt mixing to manufacture the resin composition.

[0176] In addition, from the perspective of imparting heat resistance and mechanical properties, it is preferable to supply components (A), (C), (D) and (E) from the feed port (top feed port) at the uppermost part of the extruder, and to supply components (B) and (F) from the raw material feed port (side feed port) located in the middle of the extruder as needed, and to produce a composition by melt mixing.

[0177] [Physical Properties of the Resin Composition]

[0178] Regarding the level of long-term heat aging resistance of the resin composition of this embodiment, from the perspective of preventing damage to the molded article caused by thermal degradation under an operating temperature environment of around 110°C to 140°C (e.g., 110°C or 130°C), the tensile strength retention rate after exposure to a temperature of 110°C to 140°C (e.g., 110°C or 130°C) for 500 hours is preferably maintained at 90% or more compared to before exposure. More preferably, the tensile strength retention rate after exposure to a temperature of 130°C for 500 hours is maintained at 90% or more compared to before exposure.

[0179] It should be noted that the tensile strength of the resin composition can be specifically measured using the methods described in the examples below.

[0180] From the perspective of shape retention and prevention of cracking during use of the molded article, the tensile elongation (measured at 23°C according to ISO 527) of the resin composition of this embodiment is preferably 10% or more. More preferably, it is 14% or more, and even more preferably, it is 20% or more. By being within the above range, the resin composition can be more suitable for use in internal parts of home appliances, OA systems, and office equipment. Alternatively, it can be 60% or less.

[0181] It should be noted that the tensile elongation (tensile nominal strain) of the resin composition can be determined using the methods described in the examples below.

[0182] From the perspective of preventing cracking during use, the Chiebé impact strength (measured at 23°C according to ISO 179) of the resin composition of this embodiment is preferably 2 kJ / m. 2The above. More preferably, it is 3kJ / m. 2 That's all. Additionally, it can be 20 kJ / m³. 2 the following.

[0183] It should be noted that the impact strength of the resin composition can be specifically measured using the methods described in the examples below.

[0184] From the perspective of preventing thermal deformation of thin-walled molded articles during high-temperature use, the load deformation temperature (DTUL) of the resin composition in this embodiment (measured according to ISO 75. Flat tensile method, under a load of 0.45 MPa) is preferably 110°C or higher. More preferably, it is 125°C or higher, and even more preferably 140°C or higher. Alternatively, it can be 180°C or lower.

[0185] It should be noted that the DTUL of the resin composition can be determined using the methods described in the examples below.

[0186] From the perspective of molding fluidity, the melt flow rate (MFR) of the resin composition of this embodiment (measured according to ISO 1133, at 280°C and 5 kg load) is preferably 10 g / 10 min or more. More preferably, it is 12 g / 10 min or more, and even more preferably 14 g / 10 min or more. Alternatively, it can be 60 g / 10 min or less.

[0187] It should be noted that the MFR of the resin composition can be determined using the methods described in the examples below.

[0188] [Molded product]

[0189] By molding the resin composition of this embodiment, a molded article can be obtained.

[0190] It should be noted that the average molding thickness of the molded article made of the polyphenylene ether resin composition of this embodiment is preferably in the range of 0.5 mm to 2.5 mm. More preferably, it is in the range of 0.7 mm to 2.2 mm, and even more preferably, it is in the range of 1.0 mm to 2.0 mm.

[0191] From the perspective of fully maintaining the strength of the molded article, it is preferable to be 0.5 mm or more, and from the perspective of maintaining the lightweight of the molded article, it is preferable to be 2.5 mm or less.

[0192] As a molding method for the above-mentioned resin composition, injection molding, extrusion molding, vacuum molding or pneumatic molding can be appropriately mentioned, and injection molding is more preferred from the perspective of mass production.

[0193] Regarding the molding temperature of the above-mentioned resin composition, it is preferably within the range of 260°C to 340°C (preferably 280°C to 340°C) of the maximum barrel setting temperature, more preferably within the range of 300°C to 330°C, and even more preferably within the range of 300°C to 320°C. From the viewpoint of sufficient molding processability, the molding temperature is preferably 280°C or higher, and from the viewpoint of suppressing the thermal degradation of the resin, it is preferably 340°C or lower.

[0194] Regarding the mold temperature during molding of the above-mentioned resin composition, it is preferably within the range of 40°C to 160°C, more preferably within the range of 80°C to 150°C, and even more preferably within the range of 80°C to 130°C. From the viewpoint of fully maintaining the appearance of the molded article, the mold temperature is preferably 40°C or higher, and more preferably 160°C or lower.

[0195] As a preferred molded article in this embodiment, since the reduction in mechanical properties (especially tensile strength) of the molded article caused by high-temperature aging (long-term heat exposure) under temperature conditions of about 110°C to 140°C (e.g., 110°C or 130°C) can be significantly suppressed, it can be used as a molded body with high heat resistance and good appearance. Therefore, examples include internal parts of household appliance OA equipment or electrical and electronic equipment, automotive interior parts, decorative molded parts used in various industrial products, etc.

[0196] Example

[0197] The present invention will be described below with specific embodiments and comparative examples. The present invention is not limited thereto.

[0198] The methods for determining the physical properties and the raw materials used in the examples and comparative examples are shown below.

[0199] (1. Load Deformation Temperature (DTUL))

[0200] Granules of the resin compositions prepared by the examples and comparative examples were dried in a hot air dryer at 90°C for 1 hour.

[0201] Using the dried resin composition, an injection molding machine (IS-80EPN, Toshiba Machine Co., Ltd.) equipped with an ISO property test piece mold was used. In Comparative Examples 1-6 and Examples 1-14, the barrel temperature was set to 300°C and the mold temperature to 90°C; in Comparative Examples 7-9 and Examples 15-18, the barrel temperature was set to 270°C and the mold temperature to 60°C; and in Example 19, the barrel temperature was set to 290°C and the mold temperature to 80°C. The injection pressure was set to 50 MPa (gauge pressure), the injection speed to 200 mm / sec, and the injection time / cooling time to 20 sec / 20 sec. Dumbbell-shaped molded sheets of ISO 3167 type A were then molded under the following conditions: injection pressure 50 MPa (gauge pressure), injection speed 200 mm / sec, and injection time / cooling time = 20 sec / 20 sec. The obtained dumbbell-shaped molded sheets of type A were then cut to produce molded sheets of 80 mm × 10 mm × 4 mm. Using this test piece, according to ISO 75, the load deformation temperature (DTUL) (°C) was determined at 0.45 MPa using the flat tensile method, and the average value of the three test pieces was calculated.

[0202] As an evaluation benchmark, the higher the average value of the measured values, the better the heat resistance is judged.

[0203] (2. Chabel impact strength)

[0204] Cut the ISO 3167 multipurpose test piece Type A dumbbell-shaped sheet manufactured in step 1 above to produce a shaped sheet of 80mm × 10mm × 4mm. Using this test piece, determine the notched impact strength (kJ / m²) at 23°C according to ISO 179. 2 ), calculate the average value of the 5 test pieces.

[0205] As an evaluation benchmark, the higher the average value of the measured values, the better the impact resistance is judged.

[0206] (3. Tensile strength and tensile elongation)

[0207] Using the ISO3167 multipurpose test piece type A dumbbell-shaped piece manufactured in section 1 above, according to ISO527, the tensile strength (MPa) and tensile elongation (tensile nominal strain) (%) were measured at 23°C and a test speed of 5 mm / min, and the average value of 5 test pieces was calculated.

[0208] As an evaluation criterion, the higher the average value of the measured tensile strength, the better the mechanical strength is judged. In addition, the higher the average value of the measured tensile elongation (tensile nominal strain), the better the toughness is judged.

[0209] (4. Tensile strength after aging at 110℃ or 130℃ for 500 hours)

[0210] The average tensile strength of five multi-purpose test pieces (type A dumbbell-shaped pieces) obtained in section 3 above was used as the pre-aging sample (blank, 0 hours). Additionally, in Comparative Examples 1-6 and Examples 1-14, five pieces were placed in a hot air oven set at 130°C; in Comparative Examples 7-9 and Examples 15-19, five pieces were placed in a hot air oven set at 110°C. After 500 hours, they were removed and placed at 23°C and 50% humidity for 24 hours as the aged test pieces. The tensile strength (MPa) of each test piece was measured according to ISO 527.

[0211] As an evaluation criterion, the smaller the decrease in the measured value after aging compared to the blank measured value, the better the aging characteristics are judged. In particular, the resin composition of this embodiment is preferred when the tensile strength retention rate is 90% or more, and is particularly preferred when it is 95% or more.

[0212] It should be noted that the tensile strength retention rate is calculated by the following formula.

[0213] (Tensile strength retention rate) (%) = (Tensile strength after 500 hours of aging (MPa)) / (Tensile strength before aging (MPa)) × 100

[0214] (5. Appearance evaluation of molded products based on continuous molding inspection)

[0215] The resin compositions produced by the examples and comparative examples were dried in a hot air dryer at 90°C for 2 hours. Using the dried resin compositions, continuous molding was performed using an injection molding machine (IS-100GN, Toshiba Machine Co., Ltd.) equipped with a 50mm × 50mm × 1.2mm thick mirror-finish flat mold with a #5000 polished surface. In Comparative Examples 1-6 and Examples 1-14, the barrel temperature was set to 300°C and the mold temperature to 90°C. In Comparative Examples 7-9 and Examples 15-18, the barrel temperature was set to 270°C and the mold temperature to 60°C. In Example 19, the barrel temperature was set to 290°C and the mold temperature to 80°C. The injection pressure was set to 80MPa (gauge pressure), the injection speed (panel setting) to 60%, and the injection time / cooling time to 15sec / 15sec. 200 injections were performed. The mirror-finish flat molded article after the 200th injection was visually observed. A good appearance is marked as "0", and a rough or blurry surface is marked as "×". A resin composition marked as "0" can be considered as a preferred resin composition for this embodiment.

[0216] (6.MFR)

[0217] After the granules of the resin compositions prepared by the examples and comparative examples were dried in a hot air dryer at 100°C for 2 hours, the melt flow rate (MFR) (g / 10min) was measured using a melt flow index tester (P-111, manufactured by Toyo Seiki Co., Ltd.) according to ISO1133 at a set temperature of 280°C and a load of 5kg.

[0218] As an evaluation benchmark, the higher the MFR value, the better the molding fluidity.

[0219] In addition, the higher the DTUL value and the higher the MFR value, the better the balance between heat resistance and molding flowability, which is more advantageous in material design.

[0220] [raw materials]

[0221] <Polyphenylene oxide (PPE)(A)>

[0222] (A-1)

[0223] Poly(2,6-dimethyl-1,4-phenylene) ether powder (A-1) with a specific viscosity of 0.40 dl / g (0.5 g / dl chloroform solution, 30 °C, measured using an Ubbelohde viscometer) was prepared by solution polymerization (sometimes referred to as "A-1" below).

[0224] <Styrene-based resins (B)>

[0225] (B-1)

[0226] General purpose polystyrene. Trade name: Polystyrene 680 [registered trademark], manufactured by PS Japan (sometimes referred to as "B-1" below).

[0227] (B-2)

[0228] High-impact polystyrene. Trade name: Polystyrene CT60 [registered trademark], manufactured by PETRO-CHEMICALS (sometimes referred to as "B-2" below).

[0229] <Antioxidant (C)>

[0230] (C-1)

[0231] Hindered phenolic heat stabilizers with a melting point of 242℃

[0232] Chemical name: 3,3',3”,5,5',5”-hexa-tert-butyl-a,a',a”-(trimethylbenzene-2,4,6-trimethyl)tri-p-cresol. Trade name: Irganox 1330 [registered trademark], manufactured by BASF (sometimes referred to as “C-1” below).

[0233] (C-2)

[0234] Phosphorus-based heat stabilizers with a melting point of 184℃

[0235] Chemical name: Tris(2,4-di-tert-butylphenyl) phosphite. Trade name: Irgafos168 [registered trademark], manufactured by BASF (sometimes referred to as "C-2" below).

[0236] (C-3)

[0237] Phosphorus-based heat stabilizers with a melting point of 235℃

[0238] Chemical name: 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane. Trade name: ADKSTAB PEP-36 [registered trademark], manufactured by ADEKA (sometimes referred to as "C-3" below).

[0239] It should be noted that the melting point of the heat stabilizer was determined using a melting point tester of model B-545 (manufactured by Shibata Scientific Co., Ltd.).

[0240] <Metal oxides, metal sulfides (D)>

[0241] (D-1)

[0242] Titanium oxide (TiO2) with an average primary particle size of 0.2 μm. Trade name: R-TC30 [registered trademark], manufactured by Huntsman Corporation (sometimes referred to as "D-1" below).

[0243] (D-2)

[0244] Zinc oxide (ZnO) with an average primary particle size of 0.3 μm. Trade name: Ginkgo A [registered trademark], manufactured by Mitsui Metals & Mining Co., Ltd. (sometimes referred to as "D-2" below).

[0245] (D-3)

[0246] Zinc sulfide (ZnS) with an average primary particle size of 0.3 μm. Trade name: Sacuti HD [registered trademark], manufactured by Sacutiben Co., Ltd. (sometimes referred to as "D-3" below).

[0247] (D-4)

[0248] Magnesium oxide (MgO) with an average primary particle size of 0.6 μm. Trade name: STARMAG PSF-150 [registered trademark], manufactured by Shinjima Chemical Industry Co., Ltd. (sometimes referred to as "D-4" below).

[0249] <Lubricant (E)>

[0250] (E-1)

[0251] Zinc stearate. Trade name: Daiwax Z [registered trademark], manufactured by Daiwax Chemical Industry Co., Ltd. (sometimes referred to as "E-1" below).

[0252] (E-2)

[0253] Calcium stearate. Trade name: Calcium stearate S [registered trademark], manufactured by Nippon Oil Company (sometimes referred to as "E-2" below).

[0254] (E-3)

[0255] Vinyl bis-stearamide. EBS. Trade name: KAO WAX EB-FF [registered trademark], manufactured by Kao Corporation (sometimes referred to as "E-3" below).

[0256] <Styrene-based thermoplastic elastomers (F)>

[0257] (F-1)

[0258] A copolymer containing styrene blocks and hydrogenated butadiene blocks. Trade name: Tuftec H1043 [registered trademark], manufactured by Asahi Kasei Corporation (sometimes referred to as "F-1" below).

[0259] <Other Materials>

[0260] (TAFMER)

[0261] Ethylene-propylene copolymer. Trade name: TAFMER P0680J [registered trademark], manufactured by Mitsui Chemicals Co., Ltd.

[0262] (HCA)

[0263] 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. Heat aging resistance modifier. Trade name: HCA [registered trademark], manufactured by Sanguang Company.

[0264] [Comparative Example 1]

[0265] 68 parts by weight of (A-1), 19 parts by weight of (B-1), 12 parts by weight of (F-1), and 1 part by weight of (TAFMER) were fed into the top feed port of a ZSK40MC twin-screw extruder (with screw configurations of 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 1.

[0266] [Comparative Example 2]

[0267] 68 parts by weight of (A-1), 17.5 parts by weight of (B-1), 1 part by weight of (C-3), 0.5 parts by weight of (E-1), 12 parts by weight of (F-1), and 1 part by weight of (TAFMER) were fed into the top feed port of a ZSK40MC twin-screw extruder (with screw configurations of 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 1.

[0268] [Comparative Example 3]

[0269] 68 parts by weight of (A-1), 17 parts by weight of (B-1), 1 part by weight of (C-3), 1 part by weight of (HCA), 12 parts by weight of (F-1), and 1 part by weight of (TAFMER) were fed into the top feed port of a ZSK40MC twin-screw extruder (with 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 1.

[0270] [Comparative Example 4]

[0271] A resin composition was obtained by melt-blending 68 parts by weight of (A-1), 16.5 parts by weight of (B-1), 2.5 parts by weight of raw material (pre-mixed using a Henschel mixer to obtain 80% by weight of (D-1) and 20% by weight of (E-1), 12 parts by weight of (F-1), and 1 part by weight of (TAFMER) from the top feed port of a ZSK40MC twin-screw extruder (with 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany, at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h. The physical property test results of this resin composition are shown in Table 1.

[0272] [Example 1]

[0273] The following ingredients were fed into the top feed inlet of a ZSK40MC twin-screw extruder (with 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany: 68 parts by weight of (A-1), 18.7 parts by weight of (B-1), 0.1 parts by weight of (C-3), 0.2 parts by weight of raw material pre-mixed using a Henschel mixer to form 80% by weight of (D-1) and 20% by weight of (E-1), 12 parts by weight of (F-1), and 1 part by weight of (TAFMER). The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 1.

[0274] [Example 2]

[0275] The proportions of (B-1) were changed from 18.7 parts by mass to 17.9 parts by mass, (C-3) from 0.1 parts by mass to 0.5 parts by mass, and the proportions of the raw material pre-mixed using a Henschel mixer (80% by mass of (D-1) / 20% by mass of (E-1)) from 0.2 parts by mass to 0.6 parts by mass. All other things being equal, the resin composition was melt-blended under the same conditions as in Example 1. The physical property test results of this resin composition are shown in Table 1.

[0276] [Example 3]

[0277] The proportions of (B-1) were changed from 18.7 parts by mass to 16.8 parts by mass, (C-3) from 0.1 parts by mass to 1 part by mass, and the proportions of the raw material pre-mixed using a Henschel mixer (80% by mass of (D-1) / 20% by mass of (E-1)) from 0.2 parts by mass to 1.2 parts by mass. All other things being equal, the resin composition was melt-blended under the same conditions as in Example 1. The physical property test results of this resin composition are shown in Table 1.

[0278] [Example 4]

[0279] The proportions of (B-1) were changed from 18.7 parts by mass to 15.5 parts by mass, (C-3) from 0.1 parts by mass to 1 part by mass, and the proportions of the raw material pre-mixed using a Henschel mixer (80% by mass of (D-1) / 20% by mass of (E-1)) from 0.2 parts by mass to 2.5 parts by mass. All other things being equal, the resin composition was melt-blended under the same conditions as in Example 1. The physical property test results of this resin composition are shown in Table 1.

[0280] [Example 5]

[0281] The 2.5 parts by mass of the raw material, which was previously mixed using a Henschel mixer to form 80% by mass of (D-1) and 20% by mass of (E-1), were changed to 1.5 parts by mass of (D-1) and 1 part by mass of (E-1), and melt-blended under the same conditions as in Example 4 to obtain the resin composition. The results of the physical property tests of the resin composition are shown in Table 1.

[0282] [Comparative Example 5]

[0283] The 2.5 parts by mass of the raw material, which was previously mixed using a Henschel mixer to form 80% by mass of (D-1) and 20% by mass of (E-1), were changed to 1 part by mass of (D-1) and 1.5 parts by mass of (E-1). Otherwise, the mixture was melt-blended under the same conditions as in Example 4 to obtain the resin composition. The results of the physical property tests of the resin composition are shown in Table 1.

[0284] [Comparative Example 6]

[0285] The 2.5 parts by mass of the raw material, which was previously mixed using a Henschel mixer to form 80% by mass of (D-1) and 20% by mass of (E-1), were changed to 2.2 parts by mass of (D-1) and 0.3 parts by mass of (E-1). Otherwise, the mixture was melt-blended under the same conditions as in Example 4 to obtain the resin composition. The results of the physical property tests on this resin composition are shown in Table 1.

[0286] [Example 6]

[0287] 85 parts by weight of (A-1), 7.8 parts by weight of (B-2), 1 part by weight of (C-3), 1.2 parts by weight of raw material pre-mixed using a Henschel mixer (80% by weight of (D-1) / 20% by weight of (E-1), and 5 parts by weight of (F-1) were fed into the top feed port of a ZSK40MC twin-screw extruder (with 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 1.

[0288] [Example 7]

[0289] The following components were fed into the top feed inlet of a ZSK40MC twin-screw extruder (with screw configurations of 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany: (A-1) 68 parts by weight, (B-1) 15.5 parts by weight, (C-3) 1 part by weight, (D-1) 2 parts by weight, (E-1) 0.5 parts by weight, (F-1) 12 parts by weight, and (TAFMER) 1 part by weight. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 2.

[0290] [Example 8]

[0291] (C-3) was replaced with (C-1), and melt-blending was performed under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0292] [Example 9]

[0293] (C-3) was replaced with (C-2), and melt-blending was performed under the same conditions as in Example 7 to obtain the resin composition. The results of the physical property tests of the resin composition are shown in Table 2.

[0294] [Example 10]

[0295] Replace (D-1) with (D-2), and otherwise melt-blend under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0296] [Example 11]

[0297] Replace (D-1) with (D-3), and otherwise perform melt mixing under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0298] [Example 12]

[0299] Replace (D-1) with (D-4), and otherwise melt-blend under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0300] [Example 13]

[0301] Replace (E-1) with (E-2), and otherwise melt-blend under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0302] [Example 14]

[0303] Replace (E-1) with (E-3), and otherwise perform melt mixing under the same conditions as in Example 7 to obtain a resin composition. The results of the physical property tests of this resin composition are shown in Table 2.

[0304] [Example 15]

[0305] 20 parts by weight of (A-1), 30 parts by weight of (B-1), 1 part by weight of (C-3), and 1.2 parts by weight of raw material (pre-mixed using a Henschel mixer with 80% by weight of (D-1) and 20% by weight of (E-1)) were fed into the top feed port of a ZSK40MC twin-screw extruder (with a 13-barrel, 40mm screw configuration) manufactured by Werner & Pfleiderer GmbH, Germany. 47.8 parts by weight of (B-2) were fed through the side feed port from the middle barrel 5. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain a resin composition. The physical property test results of this resin composition are shown in Table 3.

[0306] [Example 16]

[0307] Replace 12 parts by mass of (B-2) out of 47.8 parts by mass with (F-1), and supply it from the upstream part (top feed port). Otherwise, melt-mixing is performed under the same conditions as in Example 15 to obtain the resin composition. The results of the physical property tests of the resin composition are shown in Table 3.

[0308] [Example 17]

[0309] 20 parts by weight of (A-1), 26.5 parts by weight of (B-1), 2 parts by weight of (C-3), 2.1 parts by weight of (D-1), and 1.4 parts by weight of (E-1) were fed from the top feed port of a ZSK40MC twin-screw extruder (with a screw configuration of 2 kneading discs L, 6 kneading discs R, and 4 kneading discs N) manufactured by Werner & Pfleiderer GmbH, Germany. 48 parts by weight of (B-2) were fed from the middle barrel 5 through the side feed port. The mixture was melt-blended at a barrel temperature of 300°C, a screw speed of 450 rpm, and an extrusion rate of 150 kg / h to obtain the resin composition. The physical property test results of this resin composition are shown in Table 3.

[0310] [Comparative Example 7]

[0311] The proportions of (D-1) were changed from 2.1 parts by weight to 1.4 parts by weight, and (E-1) were changed from 1.4 parts by weight to 2.1 parts by weight. Otherwise, melt-blending was performed under the same conditions as in Example 17 to obtain the resin composition. The physical property test results of this resin composition are shown in Table 3.

[0312] [Comparative Example 8]

[0313] The proportions of (E-1) were changed from 1.4 parts by mass to 2.1 parts by mass, and (B-1) were changed from 26.5 parts by mass to 25.8 parts by mass. The resin composition was then melt-blended under the same conditions as in Example 17. The physical property test results of this resin composition are shown in Table 3.

[0314] [Comparative Example 9]

[0315] The proportions of (D-1) were changed from 2.1 parts by mass to 3.6 parts by mass, and (E-1) were changed from 2.1 parts by mass to 0.6 parts by mass. Otherwise, the resin composition was melt-blended under the same conditions as Comparative Example 8 to obtain the resin composition. The results of the physical property tests of the resin composition are shown in Table 3.

[0316] [Example 18]

[0317] The resin composition was obtained by changing (A-1) from 20 parts by mass to 35 parts by mass and (B-2) from 47.8 parts by mass to 32.8 parts by mass, and otherwise melt-blending was performed under the same conditions as in Example 15. The physical property test results of the resin composition are shown in Table 3.

[0318] [Example 19]

[0319] The resin composition was obtained by changing (A-1) from 35 parts by mass to 45 parts by mass, (B-1) from 30 parts by mass to 25 parts by mass, and (B-2) from 32.8 parts by mass to 27.8 parts by mass, and then melt-blending under the same conditions as in Example 18. The physical property test results of the resin composition are shown in Table 3.

[0320]

[0321]

[0322]

[0323] As shown in Table 1, the resin compositions of Comparative Examples 1 to 4 did not have sufficient heat aging resistance because they did not contain any or all of the components (C), (D), and (E) mentioned above.

[0324] The resin compositions of Comparative Examples 5 and 6 exhibited insufficient heat aging resistance because the ratio of component (D) / (E) deviated from the specified ratio. Furthermore, blurring was observed in the flat molded articles of Comparative Examples 5 and 6 after 200 injections. In Comparative Example 5, since MD, believed to originate from component (E), adhered to the mold after 200 injections, it is presumed that the adhesion of MD to the molded article was the cause of the blurred appearance. In Comparative Example 6, due to the low combined amount of component (E), it is presumed that component (D) was not sufficiently dispersed, contributing to the poor appearance.

[0325] On the other hand, the resin compositions of Examples 1-5 exhibit excellent heat aging resistance because the mixing amounts and proportions of components (C), (D), and (E) are all within the specified ranges. The appearance of the flat molded articles after the 200th injection is good.

[0326] As shown in Table 2, the resin compositions of Examples 7-14 exhibit excellent heat aging resistance because the mixing amounts and proportions of components (C), (D), and (E) are all within the specified ranges. The appearance of the flat molded articles after the 200th injection is good.

[0327] As shown in Table 3, the resin compositions of Examples 15-19 exhibit excellent heat aging resistance because the mixing amounts and ratios of components (C), (D), and (E) are all within the specified ranges, and the appearance of the flat molded articles after the 200th injection is good. On the other hand, the resin composition of Comparative Example 7 has insufficient heat aging resistance because the ratio of component (D) / (E) is outside the specified ratio.

[0328] Furthermore, in Examples 17 and Comparative Examples 7-9, blurring was observed in the flat molded articles after the 200th injection. In Example 17, the ratio of component (D) / (E) was within the specified range, but the amount of component (E) was excessive, which is presumably the reason for the decreased appearance. On the other hand, in Comparative Examples 7-9, the mixing ratio of component (D) / (E) was outside the specified range, and in Comparative Examples 8 and 9, the amount of component (D) / (E) was outside the specified upper limit, thus the heat aging resistance was insufficient. In Comparative Examples 7 and 8, MD, believed to originate from component (E), was found adhering to the mold after 200 injections, so the adhesion of MD on the molded article is presumably the reason for the decreased appearance due to blurring. In Comparative Example 9, the amount of component (D) was excessive relative to the amount of component (E), so the insufficient dispersion of component (D) is presumably the reason for the poor appearance.

[0329] Industrial applicability

[0330] The polyphenylene ether resin composition of the present invention exhibits excellent heat aging resistance at around 110°C to 140°C (e.g., 110°C or 130°C) while maintaining the balance of rigidity and toughness inherent in polyphenylene ether resins without damage. Therefore, it can be effectively used in internal components of household appliance OA equipment or electrical and electronic equipment, automotive interior components, and decorative molded parts used in various industrial products.

Claims

1. A polyphenylene ether-based resin composition, characterized by, It contains: Polyphenylene ether (A); Antioxidant (C); Metal oxides and / or metal sulfides (D); Lubricant (E), which is at least one selected from the group consisting of higher fatty acid amides, higher fatty acid diamides, and higher fatty acid metal salts; and Flame retardants, It may also optionally contain styrene-based resin (B). Relative to a total of 100 parts by mass of component (A), component (B), component (C), component (D), and component (E), the mass ratio of each component is as follows: (A) Components: 10 to 95 parts by weight (B) Components: 0-80 parts by weight (C) Component 0.05 parts by weight to 3 parts by weight, The total of components (D) and (E) is 0.1 to 2 parts by weight. The mass ratio of component (D) to component (E) is (D) / (E) = 80 / 20 to 60 / 40. The metal oxide and / or metal sulfide (D) is at least one selected from the group consisting of titanium oxide, zinc oxide, zinc sulfide, magnesium oxide, aluminum oxide, barium oxide, calcium oxide, and molybdenum oxide. The flame retardant is present in a mass ratio of less than 3% by mass relative to 100% by mass of the resin composition.

2. The polyphenylene ether-based resin composition according to claim 1, wherein It further contains inorganic fillers, with the inorganic filler accounting for less than 15% by mass relative to 100% by mass of the polyphenylene ether resin composition.

3. The polyphenylene ether-based resin composition according to claim 2, wherein, The inorganic filler has a mass ratio of less than 4%.

4. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The component (C) is an antioxidant with a melting point of 180°C or higher.

5. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The proportion of aromatic phosphate flame retardant and / or phosphazene flame retardant in 100% by weight of the polyphenylene ether resin composition is less than 5% by weight.

6. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The component (C) is a phosphorus-based antioxidant.

7. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The (D) component comprises at least one selected from the group consisting of titanium oxide, zinc oxide, and zinc sulfide.

8. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The total mass ratio of component (C), component (D), and component (E) is 4 parts by mass or less, relative to a total of 100 parts by mass of component (A), component (B), component (C), component (D), and component (E).

9. The polyphenylene ether-based resin composition of claim 1 or 3, further comprising a styrene-based thermoplastic elastomer (F), wherein component (B) does not include components within the scope of component (F). The mass ratio of component (F) is 0.1 to 25 parts by mass relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E).

10. The polyphenylene ether-based resin composition according to Claim 9, wherein The total mass percentage of component (A), component (B), component (C), component (D), component (E), and component (F) is 85% or more relative to 100% by mass of the polyphenylene ether resin composition.

11. The polyphenylene ether resin composition according to claim 1 or 3, wherein, It further contains a polyolefin resin, wherein the mass percentage of the polyolefin resin is less than 5% by mass relative to 100% by mass of the polyphenylene ether resin composition.

12. The polyphenylene ether resin composition according to claim 1 or 3, wherein the tensile strength retention rate after aging at 130°C for 500 hours is more than 90%.

13. The polyphenylene ether-based resin composition according to Claim 1 or 3, wherein, The mass proportion of component (A) is 10 to 90 parts by mass relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E).

14. The polyphenylene ether-based resin composition according to Claim 1 or 3, wherein, Of the total 100 parts by mass of components (A), (B), (C), (D), and (E), the mass proportion of component (B) is more than 0 parts by mass and less than 80 parts by mass.

15. The polyphenylene ether-based resin composition according to Claim 1 or 3, wherein, The mass proportion of component (C) is 0.1 to 2 parts by mass relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E).

16. The polyphenylene ether-based resin composition according to claim 1 or 3, wherein, The average primary particle size of the (D) component is 0.01 μm to 1 μm.

17. The polyphenylene ether-based resin composition according to Claim 1 or 3, wherein, Of the total 100 parts by mass of components (A), (B), (C), (D), and (E), the mass proportion of component (D) is 0.05 parts by mass or more and less than 2 parts by mass.

18. The polyphenylene ether-based resin composition according to Claim 1 or 3, wherein, The mass proportion of component (E) is 0.015 to 1.60 parts by mass relative to a total of 100 parts by mass of components (A), (B), (C), (D), and (E).

19. The polyphenylene ether-based resin composition of claim 1 or 3, wherein, The total mass ratio of component (D) to component (E) is 0.15 to 2 parts by mass relative to a total of 100 parts by mass of component (A), component (B), component (C), component (D), and component (E).

20. The polyphenylene ether-based resin composition according to Claim 4, wherein The component (C) is an antioxidant with a melting point of 180℃~310℃.

21. A method for manufacturing a polyphenylene ether resin composition, comprising the method for manufacturing the polyphenylene ether resin composition according to any one of claims 1 to 20, characterized in that, The process includes the melt-blending of component (A), component (C), component (D), and component (E), as well as optional component (B), component (F), and / or other materials. In the melt mixing process, a substance formed by pre-mixing the (D) component and the (E) component is used as a raw material.

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