Polyarylene sulfide resin composition, resin member, metal-resin composite molded article, automobile component, and electrical and electronic component

Abstract

Provided is a polyarylene sulfide resin composition from which a metal-resin composite molded article having excellent airtightness is obtained. This polyarylene sulfide resin composition comprises a polyarylene sulfide resin and an olefin-based copolymer including an α-olefin-derived constitutional unit having at least two carbon atoms, wherein: the olefin-based copolymer contains at least one functional group selected from the group consisting of an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an epoxy group, a glycidyl group, an isocyanate group, an isothiocyanate group, an acetoxy group, a silanol group, an alkoxysilane group, an alkynyl group, an oxazoline group, a thiol group, a sulfonic acid group, a sulfonate residue, and a carboxylic acid ester group; the content of the olefin-based copolymer is 2-30 parts by mass with respect to 100 parts by mass of the polyarylene sulfide resin; and the maximum mold release resistance value at a mold setting temperature of 150ºC is 50-340 N.

Description

Polyarylene sulfide resin compositions, resin components, metal-resin composite molded products, automotive parts, and electrical and electronic components

[0001] This disclosure relates to polyarylene sulfide resin compositions, resin components, metal-resin composite molded articles, automotive parts, and electrical and electronic components.

[0002] Polyarylene sulfide resins (hereinafter sometimes referred to as "PPS resin"), exemplified by polyphenylene sulfide resin (hereinafter sometimes referred to as "PPS resin"), are widely used in electrical and electronic equipment components, automotive parts, chemical equipment components, etc., due to their excellent heat resistance, mechanical properties, chemical resistance, dimensional stability, and flame retardancy, and are also used in metal-resin composite molded products. In metal-resin composite molded products such as busbars and oil seals, high airtightness is required at the interface between the resin and the metal component. Patent Document 1 describes a method for roughening the surface of a metal component with a laser in a metal-resin composite molded product in which a metal component and a polyarylene sulfide resin composition are joined, in order to improve the airtightness of the joint.

[0003] International Publication No. 2024 / 241932

[0004] To improve the airtightness of the joints in metal-resin composite molded products, one possible improvement is to increase the molecular weight of the polyarylene sulfide resin itself or to add an elastomer to the polyarylene sulfide resin. However, increasing the molecular weight of the polyarylene sulfide resin increases viscosity, making it difficult for the resin to transfer to the fine irregularities of the metal component, thus making it difficult to improve airtightness. In addition, problems arise such as difficulty in thinning the wall due to decreased fluidity; decomposition of the resin and generation of gas due to heat generated by high shear, which causes mold deposits; and deterioration of mold release properties, which can cause product deformation or make mass production difficult.

[0005] The object of this disclosure is to provide a polyarylene sulfide resin composition that can yield metal-resin composite molded articles with excellent airtightness.

[0006] This disclosure includes the following embodiments: A polyarylene sulfide resin composition comprising a polyarylene sulfide resin and an olefin copolymer containing structural units derived from α-olefins having 2 or more carbon atoms, wherein the olefin copolymer contains at least one functional group selected from the group consisting of amino groups, carboxyl groups, hydroxyl groups, acid anhydride groups, epoxy groups, glycidyl groups, isocyanate groups, isothiocyanate groups, acetoxy groups, silanol groups, alkoxysilane groups, alkynyl groups, oxazoline groups, thiol groups, sulfonic acid groups, sulfonate residues, and carboxylic acid ester groups, wherein the content of the olefin copolymer is 2 parts by mass or more and 30 parts by mass or less per 100 parts by mass of the polyarylene sulfide resin, and the maximum release resistance value at a mold setting temperature of 150°C is 50 to 340 N.

[0007] According to this disclosure, a polyarylene sulfide resin composition can be provided that yields metal-resin composite molded articles with excellent airtightness.

[0008] This diagram illustrates a double-cylindrical molded product used for evaluating mold release properties, with (a) being a top view, (b) a bottom view, (c) a perspective view, and (d) a dimensioned view. This diagram shows the shape of the test specimen used in the airtightness test. This diagram shows the schematic configuration of the test apparatus for the airtightness test.

[0009] One embodiment of the present disclosure will be described in detail below, but the scope of the present disclosure is not limited to the embodiment described herein, and various modifications can be made without departing from the spirit of the present disclosure. Each embodiment disclosed herein can be combined with any other features disclosed herein. If multiple upper and lower limits are given for a particular parameter, any combination of these upper and lower limits can be used to create a suitable numerical range. The lower and / or upper limits of the numerical ranges described herein may be replaced with numerical values ​​within that range, as shown in the examples. The expression "X to Y" indicating a numerical range means "X or greater and Y or less". Each numerical parameter is given as a value rounded to one digit below the given significant figures. If a particular description given for one embodiment also applies to other embodiments, that description may be omitted in the other embodiments.

[0010] [Polyarylene sulfide resin composition] The first embodiment of this disclosure relates to a polyarylene sulfide resin composition. "Polyarylene sulfide resin composition" means a composition containing a polyarylene sulfide resin.

[0011] The polyarylene sulfide resin composition according to this embodiment (hereinafter also simply referred to as "resin composition") comprises a polyarylene sulfide resin and an olefin copolymer containing structural units derived from α-olefins having 2 or more carbon atoms (hereinafter also simply referred to as "olefin copolymer"), wherein the olefin copolymer contains at least one functional group selected from the group consisting of amino groups, carboxyl groups, hydroxyl groups, acid anhydride groups, epoxy groups, glycidyl groups, isocyanate groups, isothiocyanate groups, acetoxy groups, silanol groups, alkoxysilane groups, alkynyl groups, oxazoline groups, thiol groups, sulfonic acid groups, sulfonate residues, and carboxylic acid ester groups, the content of the olefin copolymer is 2 parts by mass or more and 30 parts by mass or less per 100 parts by mass of the polyarylene sulfide resin, and the maximum release resistance value at a mold setting temperature of 150°C is 50 to 340 N.

[0012] Generally, it was believed that a resin composition with a high mold release resistance value has better adhesion to metal, thus improving the airtightness at the interface between metal and resin in metal-resin composite molded products. However, in the course of research, the inventors discovered that in a resin composition in which an olefin copolymer having predetermined structural units and predetermined substituents is blended in a certain proportion with a polyarylene sulfide resin, a lower mold release resistance value results in superior airtightness of the metal-resin composite molded product, leading to the completion of this disclosure. Furthermore, because the resin composition of this disclosure has an even lower mold release resistance value, it is less likely to stick to the mold. Therefore, it has the characteristic of being less prone to mold release defects, which in turn reduces the likelihood of defects due to product deformation, reduces the frequency of mold maintenance, and makes it more suitable for mass production of products.

[0013] (Polyarylene sulfide (PAS) resin) Polyarylene sulfide resin (hereinafter also referred to as "PAS resin") is a resin having repeating units represented by the following general formula (I): -(Ar-S)- ... (I) (where Ar represents an arylene group.)

[0014] The arylene group is not particularly limited, but examples include p-phenylene group, m-phenylene group, o-phenylene group, substituted phenylene group, p,p'-diphenylene sulfone group, p,p'-biphenylene group, p,p'-diphenylene ether group, p,p'-diphenylene carbonyl group, naphthalene group, etc. The PAS resin can be a homopolymer using the same repeating unit as represented by the above general formula (I), or a copolymer containing different types of repeating units.

[0015] As a homopolymer, one having a p-phenylene group as the arylene group and consisting of repeating p-phenylene sulfide groups is preferred. This is because homopolymers with repeating p-phenylene sulfide groups have extremely high heat resistance and exhibit high strength and rigidity over a wide temperature range. By using such a homopolymer, a molded article with excellent physical properties can be obtained.

[0016] As the copolymer, a combination of two or more different arylene sulfide groups from among the arylene groups containing the above-mentioned arylene group can be used. Among these, a combination containing a p-phenylene sulfide group and an m-phenylene sulfide group is preferred from the viewpoint of obtaining a molded article with high physical properties such as heat resistance, moldability, and mechanical properties. A polymer containing 70 mol% or more of p-phenylene sulfide groups is more preferred, and a polymer containing 80 mol% or more is even more preferred. Note that the PAS resin having phenylene sulfide groups is a PPS resin.

[0017] PAS resins are generally known to have molecular structures that are substantially linear with no branching or crosslinking, or structures that have branching or crosslinking, depending on their manufacturing method. In this embodiment, both types are effective. Among them, high molecular weight polymers with a substantially linear structure obtained by condensation polymerization from monomers mainly composed of bifunctional halogen aromatic compounds are particularly preferred. In this embodiment, the PAS resin used may be a mixture of two or more PAS resins with different molecular weights.

[0018] The melt viscosity of the PAS resin is not particularly limited as long as it does not impair the effects of this disclosure, but at 310°C and a shear rate of 1200 sec －１ The melt viscosity measured is preferably 50 Pa·s or less, including in the case of the above-mentioned mixed system, and is particularly preferably in the range of 5 to 50 Pa·s.

[0019] A higher cooling crystallization temperature (Tc) for PAS resin is preferable. A higher cooling crystallization temperature (Tc) for PAS resin makes it easier to obtain metal-resin composite molded products with superior airtightness. For example, the cooling crystallization temperature (Tc) for PAS resin is preferably 200°C or higher, and may exceed 230°C. The cooling crystallization temperature (Tc) for PAS resin is the exothermic peak temperature associated with crystallization observed when the PAS resin is heated to 340°C using a differential scanning calorimeter to melt it, and then cooled at a rate of 10°C / min.

[0020] From the viewpoint of easily adjusting the maximum release resistance of the resin composition and more easily obtaining metal-resin composite molded products with excellent airtightness, the chlorine (Cl) content (chlorine amount) measured by combustion ion chromatography is preferably 1,500 to 8,500 ppm, more preferably 2,000 to 8,500 ppm, and even more preferably 2,500 to 8,500 ppm, in the total amount (100 mass%) of the PAS resin. The measurement conditions for combustion ion chromatography can be as described in the examples below.

[0021] From the viewpoint of making it easier to obtain metal-resin composite molded products with excellent airtightness, the nitrogen (N) content (nitrogen amount) of the PAS resin is preferably 400 to 800 ppm, more preferably 500 to 750 ppm, and even more preferably 550 to 700 ppm, in the total amount (100 mass%) of the PAS resin. The nitrogen amount can be measured using a trace nitrogen sulfur analyzer. A calibration curve for the nitrogen amount can be prepared using a pyridine toluene solution.

[0022] The method for producing PAS resin is not particularly limited and can be produced by conventionally known production methods. When obtaining high molecular weight PAS resin, for example, it can be produced by synthesizing a low molecular weight PAS resin and then polymerizing it at high temperature in the presence of a known polymerization aid to increase its molecular weight. Alternatively, it may be produced by blending multiple types of PAS resins.

[0023] In one embodiment, the method for producing PAS resin preferably involves a washing treatment after polymerization, in which the resin is washed with an acidic aqueous solution of appropriate acidity. Washing with an acidic aqueous solution tends to increase the cooling crystallization temperature (Tc) of the resulting PAS resin. Examples of acids used as the acidic aqueous solution include inorganic acids such as hydrochloric acid, sulfuric acid, and ammonium chloride; saturated fatty acids such as acetic acid, formic acid, propionic acid, butyric acid, valeric acid, and caproic acid; unsaturated fatty acids such as acrylic acid, crotonic acid, and oleic acid; aromatic carboxylic acids such as benzoic acid, phthalic acid, and salicylic acid; dicarboxylic acids such as oxalic acid, maleic acid, and fumaric acid; and methanesulfonic acid and p-toluenesulfonic acid. Among these, hydrochloric acid, acetic acid, and ammonium chloride are preferred, with acetic acid being more preferred, from the viewpoint of more easily increasing the cooling crystallization temperature (Tc) of the PAS resin. Before and after washing with the acidic aqueous solution, washing with an organic solvent such as acetone or water may be performed as needed.

[0024] (Olefin Copolymer) The resin composition according to this embodiment contains an olefin copolymer having predetermined structural units and predetermined substituents, wherein the content of the olefin copolymer in the resin composition is 2 parts by mass or more and 30 parts by mass or less per 100 parts by mass of polyarylene sulfide resin. It has been newly discovered that a PAS resin containing the olefin copolymer in the above range has a lower mold release resistance, which makes it easier to obtain a metal-resin composite molded product with excellent airtightness.

[0025] The above-mentioned olefin copolymer is an olefin copolymer containing structural units derived from α-olefins having two or more carbon atoms, and contains at least one functional group selected from the group consisting of amino groups, carboxyl groups, hydroxyl groups, acid anhydride groups, epoxy groups, glycidyl groups, isocyanate groups, isothiocyanate groups, acetoxy groups, silanol groups, alkoxysilane groups, alkynyl groups, oxazoline groups, thiol groups, sulfonic acid groups, sulfonate residues, and carboxylic acid ester groups. The above-mentioned functional group may be contained in structural units derived from α-olefins having two or more carbon atoms, or in other structural units.

[0026] The above-mentioned olefin copolymer is preferably a copolymer of an olefin and an unsaturated monomer having the above-mentioned functional group, or a copolymer obtained by copolymerizing an olefin polymer with an unsaturated monomer having the above-mentioned functional group. Such copolymers may be graft copolymers, random copolymers, or block copolymers. Furthermore, for example, if the functional group is an epoxy or glycidyl group, the epoxy group may be introduced by oxidizing the unsaturated bonds present at the ends of the olefin polymer, or in copolymers of olefins and other unsaturated monomers, etc., and in these composites, with hydrogen peroxide or organic peracids, such as perbenzoic acid, performic acid, and peracetic acid. In other words, any olefin polymer into which the above-mentioned functional group has been introduced may be used.

[0027] Examples of α-olefins having two or more carbon atoms include ethylene, propylene, 1-butene, isobutylene, 2-butene, cyclobutene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-butene, 4-methyl-1-butene, cyclopentene, 1-hexene, cyclohexene, 1-octene, 1-decene, and 1-dodecene. These may be used individually or in combination of two or more. Among these, ethylene is particularly preferred as the α-olefin having two or more carbon atoms, and ethylene copolymers are preferred as the olefin copolymers. The content of α-olefin-derived structural units is not particularly limited, but can be, for example, 0.5 to 20% by mass in the total resin composition.

[0028] The above olefin-based copolymer contains at least one functional group selected from the group consisting of an amino group, a carboxyl group, a hydroxyl group, an acid anhydride group, an epoxy group, a glycidyl group, an isocyanate group, an isothiocyanate group, an acetoxy group, a silanol group, an alkoxysilane group, an alkynyl group, an oxazoline group, a thiol group, a sulfonic acid group, a sulfonate residue, and a carboxylic acid ester group. Among the above functional groups, an acid anhydride group, an epoxy group, and a glycidyl group are more preferred, and an epoxy group and a glycidyl group are even more preferred.

[0029] Examples of the olefin-based copolymer containing a glycidyl group or an epoxy group include olefin-based copolymers having a glycidyl ester, a glycidyl ether, or the like in a side chain thereof, and products obtained by epoxidizing the double bond moiety of an olefin-based copolymer having a double bond.

[0030] More specific examples of the olefin copolymer containing a glycidyl group or an epoxy group include an olefin-based copolymer obtained by copolymerizing an α-olefin and a monomer having a glycidyl group or an epoxy group, and a glycidyl group-containing olefin-based copolymer obtained by copolymerizing an α-olefin and a glycidyl ester of an α,β-unsaturated acid is particularly preferably used. Accordingly, the olefin-based copolymer preferably contains a structural unit derived from a glycidyl ester of an α,β-unsaturated acid in addition to a structural unit derived from an α-olefin having 2 or more carbon atoms. That is, the above olefin-based copolymer preferably contains a structural unit derived from a glycidyl ester of an α,β-unsaturated acid.

[0031] The glycidyl ester of an α,β-unsaturated acid (hereinafter also simply referred to as "glycidyl ester") is not particularly limited, and is, for example, represented by the following general formula (I): [In formula (I), R １ represents hydrogen or an alkyl group having 1 to 10 carbon atoms.] Mention may be made of those having the structure shown in .

[0032] Examples of compounds represented by formula (I) include glycidyl acrylate, glycidyl methacrylate, and glycidyl ethacrylate. Among these, glycidyl methacrylate is preferred. The glycidyl ester of the α,β-unsaturated acid can be used alone or in combination of two or more. The content of constituent units derived from the glycidyl ester of the α,β-unsaturated acid is preferably 0.02 to 2.5% by mass of the total resin composition, more preferably 0.05 to 1.5% by mass, and particularly preferably 0.08 to 1.0%. When the content of constituent units derived from the glycidyl ester of the α,β-unsaturated acid is within this range, it is easy to obtain a metal-resin composite molded product with excellent airtightness while suppressing a decrease in fluidity and a decrease in the strength of the resin member.

[0033] The olefin copolymer preferably further contains structural units derived from alkyl (meth)acrylate. In particular, it is preferable that it contains structural units derived from glycidyl esters of α,β-unsaturated acids and structural units derived from alkyl (meth)acrylate. In this specification, alkyl (meth)acrylate is also referred to as (meth)alkyl acrylate. For example, glycidyl (meth)acrylate is also referred to as glycidyl (meth)acrylate. In this specification, "(meth)acrylic acid" means both acrylic acid and methacrylic acid, and "(meth)acrylate" means both acrylate and methacrylate.

[0034] The alkyl (meth)acrylate is not particularly limited, and examples thereof include alkyl acrylates such as methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-hexyl acrylate, n-amyl acrylate, and n-octyl acrylate; and alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-hexyl methacrylate, n-amyl methacrylate, and n-octyl methacrylate. Among these, methyl acrylate is particularly preferred. The alkyl (meth)acrylate may be used alone, or two or more kinds thereof may be used in combination. The content of the copolymerization component derived from the alkyl (meth)acrylate is not particularly limited, but may be, for example, 0.2 to 5.5% by mass based on the total resin composition.

[0035] More specific examples of the olefin-based copolymer include maleic anhydride-modified ethylene-based copolymers, glycidyl methacrylate-modified ethylene-based copolymers, glycidyl ether-modified ethylene-based copolymers, ethylene alkyl acrylate copolymers, and the like. Among these, it is preferable that the olefin-based copolymer includes at least one olefin-based copolymer selected from the group consisting of maleic anhydride-modified ethylene-based copolymers, glycidyl methacrylate-modified ethylene-based copolymers, and glycidyl ether-modified ethylene-based copolymers, and it is most preferable that the olefin-based copolymer includes a glycidyl methacrylate-modified ethylene-based copolymer.

[0036] Examples of glycidyl methacrylate-modified ethylene copolymers include glycidyl methacrylate graft-modified ethylene copolymers, ethylene-glycidyl methacrylate copolymers, ethylene-glycidyl methacrylate-methyl acrylate copolymers, ethylene-glycidyl methacrylate-ethyl acrylate copolymers, ethylene-glycidyl methacrylate-propyl acrylate copolymers, and ethylene-glycidyl methacrylate-butyl acrylate copolymers. Among these, ethylene-glycidyl methacrylate copolymers and ethylene-glycidyl methacrylate-methyl acrylate copolymers are preferred from the viewpoint of easily obtaining metal-resin composite molded products with excellent airtightness, and ethylene-glycidyl methacrylate-methyl acrylate copolymers are particularly preferred. Specific examples of ethylene-glycidyl methacrylate copolymers and ethylene-glycidyl methacrylate-methyl acrylate copolymers include "Bondfast" (registered trademark, manufactured by Sumitomo Chemical Co., Ltd.).

[0037] Examples of glycidyl ether-modified ethylene copolymers include glycidyl ether graft-modified ethylene copolymers and glycidyl ether-ethylene copolymers.

[0038] Olefin copolymers can be produced by copolymerization using conventionally known methods. For example, the above-mentioned olefin copolymers can be obtained by copolymerization using a commonly known radical polymerization reaction. The type of olefin copolymer is not particularly limited, and as described above, it may be a random copolymer or a block copolymer. Furthermore, the above-mentioned olefin copolymer may be an olefin graft copolymer in which, for example, poly(meth)acrylate methyl, poly(meth)acrylate ethyl, poly(meth)acrylate butyl, poly(meth)acrylate-2-ethylhexyl, polystyrene, polyacrylonitrile, acrylonitrile-styrene copolymer, (meth)acrylate-styrene copolymer, etc., are chemically bonded to the olefin copolymer in a branched or crosslinked structure.

[0039] In one embodiment, the content of the olefin copolymer is preferably 2 to 28 parts by mass, more preferably 3 to 26 parts by mass, even more preferably 4 to 25 parts by mass, and particularly preferably 5 to 23 parts by mass, per 100 parts by mass of the polyarylene sulfide resin.

[0040] (Inorganic Filler) In one embodiment, the resin composition preferably contains an inorganic filler, and more preferably contains a fibrous inorganic filler, from the viewpoint of heat resistance, mechanical strength, and dimensional accuracy. Examples of fibrous inorganic fillers include glass fibers, silica fibers, silica-alumina fibers, zirconia fibers, boron nitride fibers, silicon nitride fibers, boron fibers, potassium titanate fibers, wollastonite, etc., with glass fibers being the most preferred. From the viewpoint of further improving mechanical properties, the average fiber diameter of the fibrous inorganic filler is preferably 9 μm to 17 μm, and more preferably 9 μm to 15 μm. The average fiber length of the fibrous inorganic filler is not particularly limited, but considering the mechanical properties and moldability of the molded article, the average fiber length (cut length) in the initial shape is preferably 0.01 to 3.5 mm, more preferably 0.05 to 3.5 mm, even more preferably 0.1 to 3.5 mm, and particularly preferably 0.5 to 3 mm. Fibrous inorganic fillers can also use hollow fibers for purposes such as reducing the specific gravity of the resin composition. The "average fiber diameter" is calculated by measuring the longest straight-line distance in the cross-section of 10 fiber pieces using a scanning electron microscope and image processing software, and taking the arithmetic mean. The average fiber diameter can also be the manufacturer's value (a value published by the manufacturer in their catalog, etc.). The "average fiber length" is calculated by measuring the length of 1000 fiber pieces using a scanning electron microscope and image processing software, and taking the arithmetic mean. The average fiber length can also be the manufacturer's value (a value published by the manufacturer in their catalog, etc.).

[0041] The fibrous inorganic filler may or may not be surface-treated. From the viewpoint of interfacial affinity and dispersibility with the resin, surface treatment is preferable for the inorganic filler. If surface treatment is performed, it may be done with various surface treatment agents such as commonly known epoxy compounds, isocyanate compounds, silane compounds, titanate compounds, and fatty acids. For example, in the case of glass fibers, surface treatment can improve adhesion with the PAS resin. The surface treatment agent may be applied to the inorganic filler before material preparation to perform surface treatment or convergence treatment, or it may be added simultaneously during material preparation.

[0042] In one embodiment, the fibrous inorganic filler preferably contains glass fibers from the viewpoint of heat resistance and mechanical strength.

[0043] From the viewpoint of further enhancing heat resistance and mechanical strength, the content of the fibrous inorganic filler is preferably 50 to 70 parts by mass, more preferably 52.5 to 70 parts by mass, and even more preferably 55 to 70 parts by mass, per 100 parts by mass of polyarylene sulfide resin.

[0044] (Other additives) The resin composition may, if necessary, contain known substances commonly added to thermoplastic resins, such as flame retardants, colorants such as dyes and pigments, stabilizers such as antioxidants and ultraviolet absorbers, crystallization accelerators, crystal nucleating agents, etc.

[0045] The resin composition may optionally contain other thermoplastic resins other than PAS resin, as long as they do not impair the effects of the present invention. Examples of other thermoplastic resins include polyethersulfone resins and polysulfone resins. Two or more of these thermoplastic resins can also be used in mixture form. The content of other thermoplastic resin components can be, for example, 20% by mass or less, 15% by mass or less, or 10% by mass or less of the total resin composition constituting the resin molded article.

[0046] (Method for manufacturing the resin composition) The method for manufacturing the resin composition according to this embodiment is not limited and can be carried out using equipment and methods generally used for preparing synthetic resin compositions. Generally, the necessary components are mixed and melt-kneaded using a single-screw or twin-screw extruder. After that, it can be extruded to form molding pellets.

[0047] (Maximum release resistance value of the resin composition) The resin composition according to this embodiment has a maximum release resistance value of 50 to 340 N at a mold setting temperature of 150°C. "Mold setting temperature" is the set value of the mold temperature. A maximum release resistance value of 50 to 340 N makes it easier to obtain metal-resin composite molded products with excellent airtightness. Furthermore, if the maximum release resistance value is 340 N or less, the resin composition has excellent release properties. This makes it less likely for defects to occur due to product deformation, reduces the frequency of mold maintenance, and makes it more suitable for mass production of products.

[0048] In this disclosure, "mold release resistance" refers to the maximum mold release resistance value when demolding the double-cylindrical molded product shown in Figure 1 from the mold at a mold setting temperature of 150°C. Figure 1(a) is a top view of the double-cylindrical molded product, Figure 1(b) is a bottom view of the double-cylindrical molded product, Figure 1(c) is a perspective view of the double-cylindrical molded product, and Figure 1(d) is a dimensional diagram of the double-cylindrical molded product. The units of measurement for dimensions in Figures 1(a) and (d) are "mm". The gate size of the double-cylindrical molded product is 5 mm × 2.5 mm.

[0049] The double-cylindrical molded product shown in Figure 1 has a double-cylindrical structure with a first cylinder A on the inside and a second cylinder B on the outside, and the first cylinder A and the second cylinder B are connected by a 4 mm shaft. The first cylinder A has a height of 20 mm, an outer diameter of 18 mm, and an inner diameter of 9 mm, while the second cylinder B has a height of 40 mm, an outer diameter of 40 mm, and an inner diameter of 30 mm. The thickness of the side surface of the first cylinder A is 4.5 mm, and the thickness of the bottom and side surfaces of the second cylinder B is 5 mm. The second cylinder B is a bottomed cylinder, but it is open in the portion of the first cylinder A.

[0050] In one embodiment, the maximum value of the mold release resistance of the resin composition at a mold setting temperature of 150°C is 50 to 340 N, preferably 60 to 320 N, more preferably 70 to 280 N, even more preferably 80 to 250 N, and particularly preferably 80 to 230 N.

[0051] The maximum release resistance of a resin composition can be adjusted by combining one or more of the following: the chemical structure of the PAS resin, the chlorine (Cl) content in the PAS resin, the cooling crystallization temperature (Tc) of the PAS resin, the olefin copolymer content, and the substituent content (e.g., epoxy groups or glycidyl groups) in the olefin copolymer. For example, if the PAS resin has a crosslinked structure, the maximum release resistance tends to be high, so increasing the proportion of linear PAS resin makes it easier to lower the maximum release resistance of the resin composition. Also, by keeping the chlorine (Cl) content in the PAS resin within the preferred range described above, the maximum release resistance of the resin composition tends to be within the preferred range. Furthermore, if the olefin copolymer content or the epoxy groups or glycidyl groups contained in the olefin copolymer are high, the maximum release resistance tends to be high, so if the maximum release resistance is too high, the olefin copolymer content or the epoxy groups or glycidyl groups contained in the olefin copolymer can be reduced within the predetermined range described above. On the other hand, if the maximum value of the release resistance is too low due to the inclusion of release agents, etc., the maximum value of the release resistance can be increased by adjusting one or more of the above parameters.

[0052] (Melting viscosity of the resin composition) In one embodiment, the resin composition according to this embodiment has excellent fluidity, and at 310°C and a shear rate of 1000 sec, －１ The melt viscosity measured is preferably 50 to 250 Pa·s, more preferably 75 to 220 Pa·s, and even more preferably 80 to 190 Pa·s. Resin compositions having the above melt viscosity of 50 to 250 Pa·s enable thinner molded products and improved freedom of shape.

[0053] (Applications) The resin composition according to this embodiment can be widely used as a material for electrical and electronic equipment components, automotive parts, chemical equipment components, etc. In particular, since the resin composition according to this embodiment can be obtained as a metal-resin composite molded product with excellent airtightness, it can be preferably used for metal-resin composite molding (for the manufacture of metal-resin composite molded products).

[0054] [Resin Member] The second embodiment of this disclosure relates to a resin member containing the above-described resin composition. The resin member according to this embodiment can be preferably used as a resin member constituting a metal-resin composite molded product because, by containing the above-described resin composition, a metal-resin composite molded product with excellent airtightness can be obtained.

[0055] [Metal-Resin Composite Molded Article] A third embodiment of this disclosure relates to a metal-resin composite molded article comprising the resin member described above and a metal member. By comprising the resin member described above, the metal-resin composite molded article of this embodiment has excellent airtightness. "Metal-resin composite molded article" means a molded article in which metal and resin are joined in at least a part of the area. At least a part of the metal member is in contact with the resin member described above, and at least a part of the area may be covered by the resin member described above. From the viewpoint of further improving the airtightness of the metal-resin composite molded article, it is preferable that the metal member has irregularities on at least the surface in contact with the resin member. The method for forming irregularities on the surface of the metal member is not limited and can be done by known laser treatment, etching with chemicals, etc. That is, at least a part of the surface of the metal member that is in contact with (or covered by) the resin member may be subjected to physical treatment and / or chemical treatment.

[0056] The method for manufacturing a metal-resin composite molded product is not limited. For example, a metal-resin composite molded product can be obtained by injection molding using a metal member as an insert member, in which a metal member and a resin member containing the above-mentioned resin composition are joined together.

[0057] (Helium Leak Test) In one embodiment, the metal-resin composite molded product of this embodiment exhibits a helium leak amount of 1 × 10 in a helium leak test conducted using the vacuum vessel method in accordance with JIS Z 2331.－７ Pa·m ３ / s or less, preferably 1×10 －８ Pa·m ３ / s or less, more preferably 1×10 －９ Pa·m ３ / s or less, even more preferably. Details of the helium leak test will be described later.

[0058] [Automotive Parts] A fourth embodiment of the present disclosure relates to an automotive part including the above-described metal-resin composite molded article. By including the above-described metal-resin composite molded article, the automotive part of the present embodiment has excellent air tightness. The automotive part of the present embodiment is, for example, various cooling system parts, ignition-related parts, distributor parts, various sensor parts, various actuator parts, throttle parts, power module parts, ECU parts, various connector parts, and the like.

[0059] [Electrical and Electronic Parts] A fifth embodiment of the present disclosure relates to an electrical and electronic part including the above-described metal-resin composite molded article. By including the above-described metal-resin composite molded article, the electrical and electronic part of the present embodiment has excellent air tightness. The electrical and electronic part of the present embodiment is, for example, parts of household and office electrical appliances such as electrical and electronic parts including LEDs, sensors, sockets, terminal blocks, printed circuit boards, motor parts, ECU cases, lighting parts, television parts, rice cooker parts, microwave oven parts, iron parts, copying machine-related parts, printer-related parts, facsimile-related parts, heaters, air conditioner parts, and the like.

[0060] A non-limiting list of exemplary embodiments and combinations of exemplary embodiments of the present disclosure is disclosed below. [1] A polyarylene sulfide resin composition comprising a polyarylene sulfide resin and an olefin copolymer containing α-olefin-derived structural units having 2 or more carbon atoms, wherein the olefin copolymer contains at least one functional group selected from the group consisting of amino groups, carboxyl groups, hydroxyl groups, acid anhydride groups, epoxy groups, glycidyl groups, isocyanate groups, isothiocyanate groups, acetoxy groups, silanol groups, alkoxysilane groups, alkynyl groups, oxazoline groups, thiol groups, sulfonic acid groups, sulfonate residues, and carboxylic acid ester groups, wherein the content of the olefin copolymer is 2 parts by mass or more and 30 parts by mass or less per 100 parts by mass of the polyarylene sulfide resin, and the maximum release resistance value at a mold setting temperature of 150°C is 50 to 340 N. [2] The polyarylene sulfide resin composition according to [1], wherein the chlorine (Cl) content measured by combustion ion chromatography is 1500 to 8500 ppm in the polyarylene sulfide resin. [3] The polyarylene sulfide resin composition according to [1] or [2], wherein the olefin copolymer contains structural units derived from glycidyl esters of α,β-unsaturated acids. [4] The polyarylene sulfide resin composition according to any one of [1] to [3], wherein the olefin copolymer comprises at least one olefin copolymer selected from the group consisting of maleic anhydride-modified ethylene copolymer, glycidyl methacrylate-modified ethylene copolymer, and glycidyl ether-modified ethylene copolymer. [5] The polyarylene sulfide resin composition according to any one of [1] to [4], wherein the olefin copolymer further contains structural units derived from alkyl (meth)acrylate esters. [6] The polyarylene sulfide resin composition according to any one of [1] to [5], further comprising a fibrous inorganic filler. [7] The polyarylene sulfide resin composition according to any one of [1] to [6], further comprising 50 to 70 parts by mass of a fibrous inorganic filler per 100 parts by mass of the polyarylene sulfide resin.[8] The polyarylene sulfide resin composition according to any one of [1] to [7], further comprising glass fibers. [9] Temperature 310°C, shear rate 1000 sec. －１

[10] A polyarylene sulfide resin composition according to any one of [1] to [8], wherein the melt viscosity measured by [1] is 80 to 400 Pa·s.

[11] A polyarylene sulfide resin composition according to any one of [1] to [9] for use in metal-resin composite molded articles.

[12] A resin member comprising a resin member comprising a polyarylene sulfide resin composition according to any one of [1] to

[10] and a metal member.

[13] A helium leak amount of 1 × 10 in a helium leak test by vacuum vessel method in accordance with JIS Z 2331. －７ Pa・m ３ A metal-resin composite molded article as described in

[12] , wherein the ratio is less than or equal to / s. Automotive parts comprising a metal-resin composite molded article as described in

[14] ,

[12] , or

[13] . Electrical and electronic components comprising a metal-resin composite molded article as described in any of

[12] to

[14] . Each configuration and combination thereof in each embodiment is an example, and additions, omissions, substitutions, and other modifications can be made as appropriate without departing from the spirit of this disclosure. This disclosure is not limited by embodiments.

[0061] The present disclosure will be further illustrated by the following examples, but these examples will not limit the interpretation of the present disclosure.

[0062] [Synthesis Example 1: Synthesis of PPS-1] 5700 g of N-methylpyrrolidone (hereinafter also referred to as "NMP") was placed in a 20 L autoclave and purged with nitrogen gas. The temperature was raised to 100°C over approximately 1 hour while stirring with a stirrer at 250 rpm. After reaching 100°C, 1170 g of 74.7 wt% NaOH aqueous solution and 1990 g of sulfur source aqueous solution (NaSH 21.8 mol and Na) were added. ２Adding 0.50 mol of S and 1000 g of NMP, the mixture was heated to 200°C over approximately 2 hours, and 945 g of water, 1590 g of NMP, and 0.31 mol of hydrogen sulfide were discharged from the system. The mixture was cooled to 170°C, and 3524 g of p-dichlorobenzene (hereinafter also referred to as "p-DCB"), 2800 g of NMP, 133 g of water, and 23 g of 97% by weight of NaOH were added, bringing the temperature inside the chamber to 130°C. The mixture was then heated to 180°C over 30 minutes while stirring with a stirrer at 250 rpm. The temperature was further increased from 180°C to 220°C over 60 minutes. After reacting at 220°C for 60 minutes, the temperature was increased to 230°C over 30 minutes. The reaction was carried out at 230°C for 90 minutes to perform the preliminary polymerization. Immediately after the completion of the first polymerization stage, the stirrer speed was increased to 400 rpm and 340 g of water was injected under pressure. After the injection of water, the temperature was raised to 260°C over 1 hour, and the reaction was carried out at 260°C for 5 hours to perform the second polymerization stage. After the completion of the second polymerization stage, the reaction mixture was cooled to near room temperature, and then the reaction mixture was sieved through a 100-mesh screen to separate the granular polymer. The granular polymer was washed three times with acetone and three times with water, and then washed with 0.3% acetic acid. After further washing with water four times, the mixture was dried at 105°C for 13 hours to obtain granular PPS-1.

[0063] [Synthesis Example 2: Synthesis of PPS-2] 5700g of NMP was placed in a 20L autoclave and purged with nitrogen gas. The temperature was raised to 100°C over approximately 1 hour while stirring with a stirrer at 250 rpm. After reaching 100°C, 1170g of 74.7 wt% NaOH aqueous solution and 1990g of sulfur source aqueous solution (NaSH 21.8 mol and Na) were added. ２Add 0.50 mol of S) and 1000 g of NMP. The mixture was heated to 200°C over approximately 2 hours, and 945 g of water, 1590 g of NMP, and 0.31 mol of hydrogen sulfide were discharged from the system. The mixture was cooled to 170°C, and 3427 g of p-DCB, 2800 g of NMP, 133 g of water, and 23 g of 97 wt% NaOH were added, bringing the temperature inside the chamber to 130°C. The mixture was then heated to 180°C over 30 minutes while stirring with a stirrer at 250 rpm. The temperature was further increased from 180°C to 220°C over 60 minutes. After reacting at 220°C for 60 minutes, the mixture was heated to 230°C over 30 minutes. The reaction was carried out at 230°C for 90 minutes to perform the preliminary polymerization. Immediately after the completion of the preliminary polymerization, the stirrer speed was increased to 400 rpm, and 340 g of water was injected under pressure. After water injection, the temperature was raised to 260°C over 1 hour, and the reaction was carried out at 260°C for 5 hours to perform the subsequent polymerization. After the subsequent polymerization was completed, the reaction mixture was cooled to near room temperature, and the reaction mixture was sieved through a 100-mesh screen to separate the granular polymer. The granular polymer was washed three times with acetone and three times with water, and then washed with 0.3% acetic acid. After further washing with water four times, the mixture was dried at 105°C for 13 hours to obtain granular PPS-2.

[0064] [Synthesis Example 3: Synthesis of PPS-3] 5700g of NMP was placed in a 20L autoclave and purged with nitrogen gas. The temperature was raised to 100°C over approximately 1 hour while stirring with a stirrer at 250 rpm. After reaching 100°C, 1170g of 74.7 wt% NaOH aqueous solution and 1990g of sulfur source aqueous solution (NaSH 21.8 mol and Na) were added. ２Add 0.50 mol of S) and 1000 g of NMP. The mixture was heated to 200°C over approximately 2 hours, and 945 g of water, 1590 g of NMP, and 0.31 mol of hydrogen sulfide were discharged from the system. The mixture was cooled to 170°C, and 3283 g of p-DCB, 2800 g of NMP, 133 g of water, and 23 g of 97% by weight of NaOH were added, bringing the temperature inside the container to 130°C. The mixture was then heated to 180°C over 30 minutes while stirring with a stirrer at 250 rpm. The temperature was further increased from 180°C to 220°C over 60 minutes. After reacting at 220°C for 60 minutes, the mixture was heated to 230°C over 30 minutes. The reaction was carried out at 230°C for 90 minutes to perform the preliminary polymerization. Immediately after the completion of the preliminary polymerization, the stirrer speed was increased to 400 rpm, and 340 g of water was injected under pressure. After water injection, the temperature was raised to 260°C over 1 hour, and the reaction was carried out at 260°C for 5 hours to perform the subsequent polymerization. After the completion of the subsequent polymerization, the reaction mixture was cooled to near room temperature, and the reaction mixture was sieved through a 100-mesh screen to separate the granular polymer. The granular polymer was washed three times with acetone and three times with water, and then washed with 0.3% acetic acid. After further washing with water four times, the mixture was dried at 105°C for 13 hours to obtain granular PPS-3.

[0065] [Physical Property Measurement of PPS Resin] (Chlorine Content) The chlorine (Cl) content in each of the above PPS resins was measured by combustion ion chromatography. (Measurement Conditions) ・Ion chromatograph: DIONEX DX320 ・Combustion pretreatment equipment: Mitsubishi Chemical Corporation AQF-100, ABC, WS-100, GA-100 ・Sample: 10 mg ・Heater: Inlet Temp. / 900℃, Outlet Temp. / 1000℃ ・Absorbent: H ２ O ２ :900ppm, internal standard PO ４ ３－ The chlorine (Cl) content in PPS-1 was 6500 ppm, the chlorine (Cl) content in PPS-2 was 3700 ppm, and the chlorine (Cl) content in PPS-3 was 1200 ppm.

[0066] [Other Raw Materials] Details of the raw material components other than the PPS resin used in the examples and comparative examples are as follows: ・Olefin copolymer olefin copolymer having a glycidyl group: Sumitomo Chemical Co., Ltd., "Bondfast® 7L", E70%-GMA3%-MA27% E represents ethylene (a constituent unit derived from α-olefin), GMA represents glycidyl methacrylate (a constituent unit derived from glycidyl ester of α,β-unsaturated acid), and MA represents methyl acrylate. The percentage values ​​attached to each constituent unit represent the mass percentage of each constituent unit. ・Glass fiber: Nippon Electric Glass Co., Ltd., "Chopped Strand, ECS03T-747", average fiber diameter 13 μm, average fiber length 3 mm

[0067] [Examples 1-5, Comparative Examples 1 and 2] The above PPS resins and olefin copolymers were dry-blended in the compositions and proportions shown in Table 1 to obtain a mixture, which was then fed into a twin-screw extruder at a cylinder temperature of 320°C. Glass fibers were also fed into the extruder from a side feeder, and the mixture was melt-kneaded to obtain resin composition pellets.

[0068] [Measurement of physical properties of the resin composition] The obtained resin composition was measured for various physical properties using the following method. (Melting viscosity) Using a capillary graph manufactured by Toyo Seiki Seisakusho, a flat die with a diameter of 1 mm and a length of 20 mm was used as the capillary, with a barrel temperature of 310°C and a shear rate of 1000 sec. －１ The melt viscosity was measured.

[0069] (Release Resistance Value) Using the resin compositions of the Examples and Comparative Examples, cylindrical molded products as shown in Figure 1 were molded using an injection molding machine under the following conditions. The force required to extrude the molded piece from the mold was measured, and the maximum value of the measured measurement was defined as the release resistance value. • Pressure sensor: Kistler Japan Ltd., "Indirect In-Mold Sensor (Model: 9221A)" • Injection molding machine: FANAC, "2000i 100B" • Cylinder temperature: 320°C • Injection time: 12 seconds • Cooling time: 45 seconds • Mold setting temperature: 150°C

[0070] (Preparation of Test Specimens of Metal-Resin Composite Molded Products) Using the resin compositions of the Examples and Comparative Examples, metal-resin composite molded products 10 (hereinafter referred to as "test specimen 10") with the shape shown in Figure 2 were prepared. As shown in Figure 2, the test specimen 10 consists of an annular metal member 11 having an inner hole in the center, and a resin molded product 12 placed in the inner hole of the metal member 11. The metal member 11 is made of aluminum A1050, with an outer diameter radius of 50 mm, an inner hole diameter radius of 20 mm, and a thickness of 1 mm. The resin molded product 12 is made of the resin compositions of the Examples and Comparative Examples, with an outer diameter radius of 30 mm and a thickness of 3 mm.

[0071] Before joining the resin molded product 12, the surface of the metal member 11, within a radius of 20 mm to 26 mm (the joining surface with the resin molded product 12), was laser-treated using a laser processing machine (Amada Weldtech ML-7350DL) under the following conditions: • Laser output: 50 W • Irradiation speed: 500 mm / s • Frequency: 50 Hz • Pitch: 10 μm • Irradiation diameter: 60 μm

[0072] After laser treatment of the metal member 11, the test piece 10 shown in Figure 3 was formed by joining the metal member 11 as an insert member using insert molding under the following conditions: • Injection molding machine: Sodick TR100EH • Cylinder temperature: 330°C • Mold setting temperature: 140°C • Injection speed: 30 mm / s • Holding pressure: 50 MPa

[0073] (Helium Leak Test) Each of the above metal-resin composite molded products was subjected to an airtightness test using a vacuum method for helium leak (He leak) in accordance with JIS Z 2331. The configuration of the test apparatus is shown in Figure 3. As shown in Figure 3, the jig 2 and the test piece 10 are placed inside a chamber 3 that is sealed from the outside. The jig 2 is a bottomed rectangular parallelepiped, and by placing the test piece 10 on top, the inside of the jig 2 is sealed from the rest of the chamber 3. The valve 6 is opened and the inside of the jig 2 is evacuated by the vacuum pump 5, and then the valve 6 is closed and the chamber 3 is filled with helium gas by the helium cylinder 4. Helium gas leaking from the joint of the test piece 10 inside the chamber 3 is detected by the helium detector 7. The control device 8 displays the helium gas detection result. As the helium detector 7, we used the "GFINE" helium leak tester manufactured by Cosmo Instruments Co., Ltd. and the "L300i" manufactured by Inficon Co., Ltd. The helium pressure in the chamber 3 was set to 400 kPa, and the vacuum pressure in the jig 2 was set to 100 kPa. The helium was detected by the joint 7 between the metal member 11 and the resin molded product 12 of the test piece 10. In this test, the helium pressure (detection pressure) detected by the helium detector 7 was measured.

[0074] The results for each of the above are shown in Table 1. Note that the "chlorine content" in Table 1 is a calculated value based on the composition and content ratio shown in Table 1. Also, "-" in Table 1 means that the component is not present.

[0075]

[0076] As shown in Table 1, a metal-resin composite molded article comprising a resin member containing the resin composition of the example and a metal member exhibits a detection pressure of 1 × 10⁻¹⁶ in a helium leak (He leak) test. －８ (=1.00E-8)Pa・m ３ The value was less than / s. On the other hand, a metal-resin composite molded product comprising a resin member and a metal member containing a resin composition of a comparative example with a large mold release resistance value had a helium detection pressure of 1 × 10⁻⁶. －７ (=1.00E-7)Pa・m ３ / s, or 1 × 10 －５ (=1.00E-5)Pa・m ３The value was / s. In other words, the metal-resin composite molded product comprising a resin member containing the resin composition of the example and a metal member exhibited superior airtightness. Furthermore, the resin composition of the example had a lower melt viscosity compared to the resin composition of the comparative example. In other words, the resin composition of the example had superior fluidity, which allows for thinner walls and improved freedom of shape in various products containing the resin composition. Moreover, the resin composition of the example had a lower release resistance value compared to the resin composition of the comparative example, making it less likely for the product to stick to the mold and less likely for release defects to occur. This reduces the likelihood of defects due to product deformation, reduces the frequency of mold maintenance, and gives the product characteristics that are more suitable for mass production.

[0077] The resin composition of this embodiment can produce metal-resin composite molded products with superior airtightness, and therefore can be suitably used in various metal-resin composite molded products, etc., and has industrial applicability. The metal-resin composite molded products of this embodiment have superior airtightness, and therefore can be suitably used in various automobile parts, electrical and electronic components, etc., and have industrial applicability.

[0078] 2. Jig 3. Chamber 4. Helium cylinder 5. Vacuum pump 6. Valve 7. Helium detector 8. Control device 10. Test piece of metal-resin composite molded product 11. Metal component 12. Resin molded product

Claims

1. A polyarylene sulfide resin composition comprising a polyarylene sulfide resin and an olefin copolymer containing structural units derived from α-olefins having 2 or more carbon atoms, wherein the olefin copolymer contains at least one functional group selected from the group consisting of amino groups, carboxyl groups, hydroxyl groups, acid anhydride groups, epoxy groups, glycidyl groups, isocyanate groups, isothiocyanate groups, acetoxy groups, silanol groups, alkoxysilane groups, alkynyl groups, oxazoline groups, thiol groups, sulfonic acid groups, sulfonate residues, and carboxylic acid ester groups, wherein the content of the olefin copolymer is 2 parts by mass or more and 30 parts by mass or less per 100 parts by mass of the polyarylene sulfide resin, and the maximum release resistance value at a mold setting temperature of 150°C is 50 to 340 N.

2. The polyarylene sulfide resin composition according to claim 1, wherein the chlorine (Cl) content measured by combustion ion chromatography is 1500 to 8500 ppm in the polyarylene sulfide resin.

3. The polyarylene sulfide resin composition according to claim 1 or 2, wherein the olefin copolymer contains structural units derived from glycidyl esters of α,β-unsaturated acids.

4. The polyarylene sulfide resin composition according to claim 1 or 2, wherein the olefin copolymer comprises at least one olefin copolymer selected from the group consisting of maleic anhydride-modified ethylene copolymer, glycidyl methacrylate-modified ethylene copolymer, and glycidyl ether-modified ethylene copolymer.

5. The polyarylene sulfide resin composition according to claim 1 or 2, wherein the olefin copolymer further contains structural units derived from alkyl (meth)acrylate.

6. The polyarylene sulfide resin composition according to claim 1 or 2, further comprising a fibrous inorganic filler.

7. The polyarylene sulfide resin composition according to claim 1 or 2, further comprising 50 to 70 parts by mass of a fibrous inorganic filler per 100 parts by mass of the polyarylene sulfide resin.

8. The polyarylene sulfide resin composition according to claim 1 or 2, further comprising glass fibers.

9. Temperature 310°C, shear rate 1000 sec －１ The polyarylene sulfide resin composition according to claim 1 or 2, wherein the melt viscosity measured is 80 to 400 Pa·s.

10. The polyarylene sulfide resin composition according to claim 1 or 2, for use in metal-resin composite molded articles.

11. A resin component comprising the polyarylene sulfide resin composition according to claim 1 or 2.

12. A metal-resin composite molded article comprising a resin member containing the polyarylene sulfide resin composition according to claim 1 or 2, and a metal member.

13. In a helium leak test using the vacuum vessel method in accordance with JIS Z 2331, the leakage amount was 1 × 10⁻⁶. －７ Pa・m ３ The metal-resin composite molded article according to claim 12, wherein the value is less than or equal to / s.

14. An automotive part comprising a metal-resin composite molded product as described in claim 12.

15. An electrical and electronic component comprising a metal-resin composite molded product as described in claim 12.

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