JP2023091755A - Polyarylene sulfide resin composition and insert molded article - Google Patents

Abstract

To provide a polyarylene sulfide resin composition which can achieve both suppression in generation of burrs, and excellent heat shock resistance.SOLUTION: A polyarylene sulfide resin composition contains, with respect to 100 pts.mass of (A) a polyarylene sulfide resin having a carboxyl group terminal and predetermined melt viscosity, 0.1-1.7 pts.mass of (B) a trifunctional epoxy compound, and 1.0-45.0 pts.mass of (C) an olefinic copolymer containing a structural unit derived from α-olefin having 2 or more carbon atoms, wherein the trifunctional epoxy compound is a compound represented by the following general formula (1). In general formula (1), X, Y and Z each independently represent a single bond or a divalent connection group.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a polyarylene sulfide resin composition and an insert-molded article.

Polyarylene sulfide resins (hereinafter also referred to as "PAS resins") typified by polyphenylene sulfide resins (hereinafter also referred to as "PPS resins") have high heat resistance, mechanical properties, chemical resistance, dimensional stability, Flame retardant. Therefore, it is widely used for electrical and electronic device parts, automotive device parts, chemical device parts, and the like. However, since PAS resin has a slow crystallization speed, there are problems in that the cycle time during molding is long and that burrs are often generated during molding.

Addition of various alkoxysilane compounds is known as a method for reducing the occurrence of burrs (see Patent Documents 1 and 2). Various alkoxysilane compounds have high reactivity with PAS resins, and are recognized to have effects such as improvement of mechanical properties and suppression of burr formation. However, since the alkoxysilane compound is easily hydrolyzed, for example, if hydrolysis occurs due to moisture in the PAS resin or in the air, the desired burr suppressing effect may not be obtained.

Therefore, various proposals have been made to suppress the generation of burrs without using various alkoxysilane compounds. Patent Document 3 describes a resin composition containing a prescribed PAS resin (PPS resin), a liquid crystalline polymer, and a prescribed epoxy compound. Further, Patent Document 4 describes a PAS resin composition containing an epoxy resin and a polyamide ether resin.

Japanese Patent Publication No. 6-21169 JP-A-1-146955 JP-A-7-224208 JP 2015-214613 A

The resin composition described in Patent Document 3 is intended to improve both burr properties and weld strength, but in the PAS resin composition described in Patent Document 3, it is liquid crystallinity It is a polymer, and an epoxy compound is added to improve weld strength. In addition, in the PAS resin composition described in Patent Document 4, the polyamide ether resin plays a role in suppressing the generation of burrs, and the epoxy resin is used to improve epoxy adhesiveness.
As described above, although a PAS resin composition containing an epoxy compound has been proposed, the epoxy compound is not intentionally added to suppress the generation of burrs.

On the other hand, it is known that PAS resin alone lacks toughness and is brittle. It is If the PAS resin composition can achieve both suppression of burr generation and excellent heat shock resistance, its usefulness will be further increased.

The present invention has been made in view of the conventional problems described above, and its object is to provide a polyarylene sulfide resin composition capable of achieving both suppression of burr generation and excellent heat shock resistance. to do.

One aspect of the present invention for achieving the above object is as follows.
(1) (A) With respect to 100 parts by mass of a polyarylene sulfide resin having a terminal carboxyl group and a melt viscosity of 5 to 500 Pa s measured at a temperature of 310°C and a shear rate of 1200 sec ^-1 ,
(B) 0.1 to 1.7 parts by mass of a trifunctional epoxy compound,
(C) 1.0 to 45.0 parts by mass of an olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms,
A polyarylene sulfide resin composition, wherein the (B) trifunctional epoxy compound is a compound represented by the following general formula (1).

［一般式（１）中、Ｘ、Ｙ、及びＺは、それぞれ独立に、単結合又は２価の連結基を示す。］

[In general formula (1), X, Y and Z each independently represent a single bond or a divalent linking group. ]

(2) The polyarylene sulfide resin composition according to (1), further comprising 5 to 250 parts by mass of (D) an inorganic filler with respect to 100 parts by mass of the (A) polyarylene sulfide resin.

(3) The polyarylene sulfide resin composition according to (2) above, wherein the (D) inorganic filler is a fibrous inorganic filler.

(4) The polyarylene sulfide resin composition according to (2) above, wherein the (D) inorganic filler is a combination of a fibrous inorganic filler and a plate-like inorganic filler and/or a powdery or granular inorganic filler. thing.

(5) the (C) olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms,
(C1) amino group, carboxyl group, hydroxyl group, acid anhydride group, epoxy group, glycidyl group, isocyanate group, isothiocyanate group, acetoxy group, silanol group, alkoxysilane group, alkynyl group, oxazoline group, thiol group, sulfonic acid an olefinic copolymer containing at least one functional group selected from the group consisting of groups, sulfonate residues, and carboxylic acid ester groups;
(C2) an olefin-based copolymer containing an ethylene-derived structural unit and an α-olefin-derived structural unit having 3 or more carbon atoms, and (C3) an α-olefin-derived structural unit having 2 or more carbon atoms an olefinic copolymer containing a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester;
The polyarylene sulfide resin composition according to any one of (1) to (4) above, which is at least one olefinic copolymer selected from the group consisting of:

(6) The polyarylene sulfide resin composition according to (5) above, wherein the (C1) olefinic copolymer contains structural units derived from a glycidyl ester of an α,β-unsaturated acid.

(7) The olefin-based copolymer (C1) is at least one olefin selected from the group consisting of maleic anhydride-modified ethylene copolymers, glycidyl methacrylate-modified ethylene copolymers, and glycidyl ether-modified ethylene copolymers. The polyarylene sulfide resin composition according to (5) or (6) above, which is a system copolymer.

(8) The polyarylene sulfide resin composition according to any one of (5) to (7) above, wherein the (C1) olefin copolymer further contains a structural unit derived from a (meth)acrylic acid alkyl ester. .

(9) An insert-molded product comprising a resin member containing the polyarylene sulfide resin composition according to any one of (1) to (8) above, and an insert member containing a metal, alloy or inorganic solid.

According to the present invention, it is possible to provide a polyarylene sulfide resin composition capable of achieving both suppression of burr generation and excellent heat shock resistance.

It is a figure which shows the test piece used by the heat-shock resistance test, (a) is a perspective view, (b) is a top view. 1. It is a figure which shows the insert member of the test piece shown in FIG. 1, (a) is a perspective view, (b) is an enlarged plan view of an acute-angled-shaped part. 1. It is explanatory drawing about the dimension of the test piece shown in FIG. 1, Comprising: (a) is a top view, (b) is a side view.

The polyarylene sulfide resin composition of the present embodiment comprises: (A) 100 parts by mass of a polyarylene sulfide resin having a terminal carboxyl group and having a melt viscosity of 5 to 500 Pa s measured at a temperature of 310° C. and a shear rate of 1200 sec ⁻¹ On the other hand, (B) 0.1 to 1.7 parts by mass of a trifunctional epoxy compound and (C) 1.0 part of an olefin copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms. ~ 45.0 parts by mass. Also, (B) the trifunctional epoxy compound is a compound represented by the following general formula (1).

［一般式（１）中、Ｘ、Ｙ、及びＺは、それぞれ独立に、単結合又は２価の連結基を示す。］

[In general formula (1), X, Y and Z each independently represent a single bond or a divalent linking group. ]

The PAS resin composition of the present embodiment can suppress the generation of burrs in injection molding by containing (B) a trifunctional epoxy compound. (B) It is speculated that the increase in melt viscosity in the low shear rate region contributes to the mechanism by which burrs are suppressed by the addition of the trifunctional epoxy compound. More specifically, (B) the trifunctional epoxy compound has a relatively large number of functional groups and a small bulkiness, so it is highly reactive and readily reacts with the PAS resin. Therefore, it is presumed that the melt viscosity of the PAS resin composition increases and the generation of burrs is suppressed.
Further, as described above, since the alkoxysilane compound is easily hydrolyzed, the presence of moisture may prevent the desired burr suppressing effect from being obtained. However, since epoxy compounds are difficult to hydrolyze, the presence of moisture does not affect the burr suppressing effect.

On the other hand, since the PAS resin composition of the present embodiment contains (C) an olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms, it has excellent heat shock resistance. The mechanism by which the (C) olefin-based copolymer improves the heat shock resistance is that the inclusion of (C) the olefin-based copolymer easily imparts flexibility to the resin member. It is considered that the softening of the resin member due to the addition of N contributes to the improvement of the heat shock resistance. Among them, olefin-based copolymers containing structural units derived from ethylene and structural units derived from α-olefins having 3 or more carbon atoms, and structural units derived from α-olefins having 2 or more carbon atoms and α, β- An olefinic copolymer containing a structural unit derived from an unsaturated carboxylic acid alkyl ester easily imparts flexibility to a resin member.
In addition, when the (C) olefinic copolymer contains a specific functional group, the functional group reacts with the terminal group of the PAS resin, and this reaction causes mutual interaction between the PAS resin and the olefinic copolymer. It is presumed that the heat shock resistance is further improved by increasing the action. Among them, the functional group is preferably a functional group that reacts with the terminal carboxyl group of the PAS resin.
The heat shock resistance is also improved by including the (B) trifunctional epoxy compound. Although the mechanism is unknown, it is clear from experimental facts (see Examples below).
Each component of the PAS resin composition of the present embodiment will be described below.

[(A) Polyarylene sulfide resin]
PAS resins are characterized by excellent mechanical properties, electrical properties, heat resistance and other physical and chemical properties, and good workability.
The PAS resin is mainly a polymer compound composed of -(Ar-S)- (where Ar is an arylene group) as a repeating unit. In the present embodiment, a PAS resin having a generally known molecular structure is used. can be used.

Examples of the arylene group include p-phenylene group, m-phenylene group, o-phenylene group, substituted phenylene group, p,p'-diphenylenesulfone group, p,p'-biphenylene group, p,p'- diphenylene ether group, p,p'-diphenylenecarbonyl group, naphthalene group and the like. The PAS resin may be a homopolymer consisting only of the repeating units described above, or a copolymer containing the following heterogeneous repeating units may be preferable from the standpoint of workability and the like.

As the homopolymer, a polyphenylene sulfide resin in which p-phenylene groups are used as arylene groups and p-phenylene sulfide groups are used as repeating units is preferably used. As the copolymer, a combination of two or more different arylene sulfide groups consisting of the above arylene groups can be used. Among them, a combination containing a p-phenylene sulfide group and an m-phenylene sulfide group is particularly preferred. Used. Among these, those containing 70 mol % or more, preferably 80 mol % or more of p-phenylene sulfide groups are suitable from the viewpoint of physical properties such as heat resistance, moldability and mechanical properties. Among these PAS resins, a substantially linear high-molecular-weight polymer obtained by polycondensation from a monomer mainly composed of a bifunctional halogen aromatic compound can be particularly preferably used. The PAS resin used in this embodiment may be a mixture of two or more different molecular weight PAS resins.

In addition to the PAS resin having a linear structure, a small amount of a monomer such as a polyhaloaromatic compound having 3 or more halogen substituents is used during condensation polymerization to partially form a branched or crosslinked structure. Polymers that have undergone In addition, a polymer obtained by heating a low-molecular weight linear polymer at a high temperature in the presence of oxygen or the like to increase the melt viscosity by oxidative crosslinking or thermal crosslinking, thereby improving moldability.

The PAS resin can be produced by a conventionally known polymerization method. A PAS resin produced by a general polymerization method is usually washed several times with water or acetone, and then washed with acetic acid, ammonium chloride or the like in order to remove by-product impurities. As a result, the PAS resin ends contain carboxyl group ends in a predetermined ratio.

The melt viscosity (310° C., shear rate 1200 sec ⁻¹ ) of the PAS resin as the base resin used in this embodiment is 5 to 500 Pa from the viewpoint of the balance between mechanical properties and fluidity, including the case of the mixed system.・Use s. The melt viscosity of the PAS resin is preferably 7 to 300 Pa·s, more preferably 10 to 250 Pa·s, and particularly preferably 13 to 200 Pa·s.

In addition to the PAS resin, the PAS resin composition of the present embodiment may contain other resin components as resin components within a range that does not impair its effect. Other resin components are not particularly limited, and examples include polyethylene resin, polypropylene resin, polyamide resin, polyacetal resin, modified polyphenylene ether resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate resin, polyimide resin, and polyamideimide. Resin, polyetherimide resin, polysulfone resin, polyethersulfone resin, polyetherketone resin, polyetheretherketone resin, liquid crystal resin, fluorine resin, cyclic olefin resin (cyclic olefin polymer, cyclic olefin copolymer, etc.), thermoplastic Elastomers, silicone-based polymers, various biodegradable resins, and the like are included. Moreover, you may use together 2 or more types of resin components. Among them, polyamide resins, modified polyphenylene ether resins, liquid crystal resins, and the like are preferably used from the viewpoint of mechanical properties, electrical properties, physical/chemical properties, processability, and the like.

[(B) Trifunctional epoxy compound]
The trifunctional epoxy compound used in this embodiment is, as described above, a compound represented by the following general formula (1). Since the compound represented by the following general formula (1) is a trifunctional epoxy compound containing a benzene ring, it is highly reactive because it has a relatively large number of trifunctional groups and is small in bulk. . Furthermore, since it has a nitrogen atom, it is more reactive. On the other hand, monofunctional and bifunctional epoxy compounds are inferior in reactivity due to their small number of functional groups. In addition, a tetrafunctional epoxy compound is bulky and therefore poor in reactivity. That is, epoxy compounds other than trifunctional epoxy compounds are inferior in the effect of suppressing the generation of burrs.

［一般式（１）中、Ｘ、Ｙ、及びＺは、それぞれ独立に、単結合又は２価の連結基を示す。］

[In general formula (1), X, Y and Z each independently represent a single bond or a divalent linking group. ]

In general formula (1), examples of the divalent linking group represented by X include an alkylene group having 1 to 3 carbon atoms. Among them, a methylene group, an ethylene group and a propylene group are preferable.
In general formula (1), examples of the divalent linking group represented by Y include an alkylene group having 1 to 3 carbon atoms. Among them, a methylene group, an ethylene group and a propylene group are preferable.
In general formula (1), examples of the divalent linking group represented by Z include an alkylene group having 1 to 3 carbon atoms. Among them, a methylene group, an ethylene group and a propylene group are preferable.

In general formula (1), the benzene ring may have a substituent, and examples of the substituent include alkyl groups having 1 to 3 carbon atoms, among which methyl group is preferred. Moreover, the substitution position of the substituent is preferably a meta position with respect to the partial skeleton containing the oxygen atom, the linking group X, and the epoxy group.

The substitution position of the partial skeleton containing the nitrogen atom, the linking groups Y and Z, and the epoxy group, which is bonded to the benzene ring in the general formula (1), is the portion containing the oxygen atom, the linking group X, and the epoxy group. The ortho-, meta-, or para-position relative to the skeleton can be mentioned, with the para-position being preferred.

Among the trifunctional epoxy compounds represented by the general formula (1), the following exemplified compound (1) or (2) is preferable.

In this embodiment, 0.1 to 1.7 parts by mass of a predetermined trifunctional epoxy compound is included with respect to 100 parts by mass of the PAS resin. If the amount of the trifunctional epoxy compound is less than 0.1 parts by mass, the generation of burrs cannot be suppressed. On the other hand, when the trifunctional epoxy compound exceeds 1.7 parts by mass, the viscosity tends to increase significantly, and moldability tends to deteriorate. The content of the trifunctional epoxy compound is preferably 0.2 to 1.2 parts by mass, more preferably 0.5 to 1.0 parts by mass.

[(C) Olefin-based copolymer]
The (C) olefin-based copolymer used in the present embodiment contains structural units derived from an α-olefin having 2 or more carbon atoms. The olefinic copolymer is used to improve heat shock resistance. That is, as described above, by including the olefin copolymer, flexibility is easily imparted to the resin member, and the softening of the resin member due to the impartation of flexibility contributes to the improvement of heat shock resistance. This is considered to contribute to

(C) As the olefin copolymer, at least one selected from the group consisting of the following (C1) olefin copolymer, (C2) olefin copolymer and (C3) olefin copolymer Olefinic copolymers are preferred.
(C1) amino group, carboxyl group, hydroxyl group, acid anhydride group, epoxy group, glycidyl group, isocyanate group, isothiocyanate group, acetoxy group, silanol group, alkoxysilane group, alkynyl group, oxazoline group, thiol group, sulfonic acid olefin-based copolymer (C2) containing at least one functional group selected from the group consisting of groups, sulfonate residues, and carboxylic acid ester groups, an ethylene-derived structural unit and α having 3 or more carbon atoms - Olefin-based copolymer (C3) containing a structural unit derived from an olefin and a structural unit derived from an α-olefin having 2 or more carbon atoms and a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester Olefin-Based Copolymer In the present embodiment, the olefin-based copolymers (C1) to (C3) can be used singly or in combination of two or more. Each of the olefin copolymers (C1) to (C3) will be described in detail below.

((C1) olefin copolymer)
(C1) The olefinic copolymer is an olefinic copolymer containing the above specific functional group. That is, the (C1) olefinic copolymer is an olefinic copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms and the above specific functional group. When the olefinic copolymer contains the specific functional group, the functional group reacts with the terminal group of the PAS resin, thereby increasing the interaction between the PAS resin and the olefinic copolymer. It is presumed that such enhanced interaction further improves the heat shock resistance. Among them, it is preferable that the functional group is a functional group that reacts with the carboxyl terminal group of the PAS resin. 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.
First, structural units derived from α-olefins having 2 or more carbon atoms will be described below.

<<Structural unit derived from α-olefin having 2 or more carbon atoms>>
The α-olefin having 2 or more carbon atoms (hereinafter also simply referred to as “α-olefin”) is not particularly limited, and examples include ethylene, propylene, butylene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4-methyl-1-pentene, 4-methyl-1-hexene and the like can be mentioned. Among them, ethylene is preferred. The α-olefins may be used singly or in combination of two or more. The content of the structural unit derived from the α-olefin is not particularly limited, but can be, for example, 0.5 to 20% by mass in the total resin composition.

(C1) The glycidyl group- or epoxy group-containing olefin-based copolymer, which is one of the olefin-based copolymers, includes olefin-based copolymers having glycidyl esters, glycidyl ethers, etc. in the side chains, and double bonds. Epoxy-oxidized double bond portion of the olefin-based copolymer having such a compound may be mentioned.

A more specific embodiment of such a glycidyl group- or epoxy group-containing olefin-based (co)polymer includes an olefin-based copolymer obtained by copolymerizing a monomer having a glycidyl group or an epoxy group. Glycidyl group-containing olefinic copolymers obtained by copolymerizing glycidyl esters of α,β-unsaturated acids are preferably used.

(C1) 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. Structural units derived from glycidyl esters of α,β-unsaturated acids are described below.
In this specification, the (meth)acrylic acid alkyl ester is also referred to as (meth)alkyl acrylate. For example, glycidyl (meth)acrylate is also referred to as glycidyl (meth)acrylate. Moreover, in this specification, "(meth)acrylic acid" means both acrylic acid and methacrylic acid, and "(meth)acrylate" means both acrylate and methacrylate.

<<Structural Unit Derived from Glycidyl Ester of α,β-Unsaturated Acid>>
Glycidyl esters of α,β-unsaturated acids (hereinafter also simply referred to as “glycidyl esters”) are not particularly limited, and examples thereof include those having a structure represented by the following general formula (2). can.

（但し、Ｒ^１は、水素原子又は炭素原子数１以上１０以下のアルキル基を示す。）

(However, R ¹ represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.)

Examples of the compound represented by the general formula (2) include glycidyl acrylate, glycidyl methacrylate, and glycidyl ethacrylate. Among them, glycidyl methacrylate is preferred. Glycidyl esters of α,β-unsaturated acids can be used singly or in combination of two or more.
The content of structural units derived from glycidyl esters of α,β-unsaturated acids is preferably 0.02 to 2.5% by mass, more preferably 0.05 to 1.5% by mass in the total resin composition. %, particularly preferably 0.08 to 1.0% by mass. When the content of structural units derived from glycidyl esters of α,β-unsaturated acids is within this range, it is possible to further suppress the precipitation of mold deposits while maintaining heat shock resistance.

In addition, (C1) the olefin-based copolymer preferably contains structural units derived from (meth)acrylic acid alkyl esters. In particular, it preferably contains a structural unit derived from an α,β-unsaturated acid glycidyl ester and a structural unit derived from a (meth)acrylic acid alkyl ester. Structural units derived from (meth)acrylic acid alkyl esters are described below.

<<Structural unit derived from (meth)acrylic acid alkyl ester>>
The (meth)acrylic acid alkyl ester is not particularly limited, and examples thereof include methyl acrylate, ethyl acrylate, -n-propyl acrylate, isopropyl acrylate, -n-butyl acrylate, isobutyl acrylate, - acrylic acid alkyl esters such as n-hexyl, n-amyl acrylate, and n-octyl acrylate; methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, Methacrylic acid alkyl esters such as isobutyl methacrylate, n-hexyl methacrylate, n-amyl methacrylate and n-octyl methacrylate can be mentioned. Among them, methyl acrylate is particularly preferred. The (meth)acrylic acid alkyl esters may be used singly or in combination of two or more. The content of the copolymer component derived from the (meth)acrylic acid alkyl ester is not particularly limited, but can be, for example, 0.2 to 5.5% by mass in the total resin composition.

More specifically, (C1) olefin copolymers include, for example, maleic anhydride-modified ethylene copolymers, glycidyl methacrylate-modified ethylene copolymers, glycidyl ether-modified ethylene copolymers and ethylene alkyl acrylate copolymers. etc. Among them, at least one olefin-based copolymer selected from the group consisting of maleic anhydride-modified ethylene copolymers, glycidyl methacrylate-modified ethylene copolymers, and glycidyl ether-modified ethylene copolymers is preferable. Modified ethylene copolymers are most preferred.

Examples of the maleic anhydride-modified ethylene copolymer include a maleic anhydride graft-modified ethylene polymer, a maleic anhydride-ethylene copolymer, an ethylene-acrylic acid ester-maleic anhydride terpolymer, and the like. Among them, an ethylene-acrylic acid ester-maleic anhydride terpolymer is particularly preferable, since particularly excellent heat shock resistance can be obtained. Specific examples of the ethylene-acrylate-maleic anhydride terpolymer include "Bondyne" (manufactured by Arkema).

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 copolymer, ethylene-glycidyl methacrylate-butyl acrylate copolymer, and the like. Among them, an ethylene-glycidyl methacrylate copolymer and an ethylene-glycidyl methacrylate-methyl acrylate copolymer are preferred, and an ethylene-glycidyl methacrylate-methyl acrylate copolymer is particularly preferred, since particularly excellent heat shock resistance can be obtained. Specific examples of the ethylene-glycidyl methacrylate copolymer and the ethylene-glycidyl methacrylate-methyl acrylate copolymer include "Bond First" (manufactured by Sumitomo Chemical Co., Ltd.).

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

((C2) an olefin-based copolymer containing an ethylene-derived structural unit and an α-olefin-derived structural unit having 3 or more carbon atoms)
(C2) The olefin copolymer contains ethylene and an α-olefin having 3 or more carbon atoms as copolymer components. (C2) In the olefin copolymer, the α-olefin preferably has 3 to 20 carbon atoms, more preferably 5 to 20 carbon atoms, and even more preferably 5 to 15 carbon atoms. Examples of α-olefins having 3 or more carbon atoms include those having 3 or more carbon atoms among the structural units derived from the aforementioned α-olefins having 2 or more carbon atoms. The (C2) olefinic copolymer may be a random copolymer or a block copolymer. (C2) The olefinic copolymer may be a copolymer comprising 5 to 95% by mass of ethylene and 5 to 95% by mass of α-olefin. Specific examples of the (C2) olefin copolymer include ethylene-octene copolymer (EO), ethylene-propylene copolymer, ethylene-butylene copolymer, ethylene-pentene copolymer, ethylene-hexene copolymer. Copolymers, ethylene-heptene copolymers and the like can be mentioned, and these copolymers can also be used by mixing them.

((C3) Olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms and a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester)
(C3) The olefin-based copolymer contains, as copolymerization components, a structural unit derived from an α-olefin having 2 or more carbon atoms and a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester. In addition, it may be a random, block or graft copolymer, or a copolymer thereof modified with at least one selected from the group consisting of unsaturated carboxylic acids, acid anhydrides thereof, and derivatives thereof ( However, those corresponding to (C1) olefinic copolymers are excluded).
Since structural units derived from α-olefins having 2 or more carbon atoms have been described above, structural units derived from α,β-unsaturated carboxylic acid alkyl esters will be described below.

<<Structural Unit Derived from α,β-Unsaturated Carboxylic Acid Alkyl Ester>>
Examples of α,β-unsaturated carboxylic acid alkyl esters include methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, isobutyl methacrylate, methacryl Acid-2-ethylhexyl, hydroxyethyl methacrylate and the like can be used.

Unsaturated carboxylic acids or acid anhydrides thereof used as modifiers include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, methylmaleic acid, methylfumaric acid, mesaconic acid, citraconic acid, and glutaconic acid. acids, monomethyl maleate, monoethyl maleate, monoethyl fumarate, methyl itaconate, methyl maleic anhydride, maleic anhydride, methyl maleic anhydride, citraconic anhydride, etc., and these may be used singly or in combination of two or more. be.
Specific examples of the olefinic copolymer C3 include copolymers of ethylene and (meth)acrylic acid ester, such as ethylene ethyl acrylate copolymer (EEA) and ethylene methyl methacrylate copolymer.

Since the (C) olefin-based copolymer contains α-olefin-derived structural units as a copolymerization component, flexibility is easily imparted to the resin member. The softening of the resin member by imparting flexibility contributes to the improvement of heat shock resistance. From such a viewpoint, among the above (C) olefin copolymers, (C2) an olefin copolymer containing an ethylene-derived structural unit and an α-olefin-derived structural unit having 3 or more carbon atoms and (C3) an olefin copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms and a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester.

Among the above (C1) to (C3) olefin copolymers, (C1) the olefin copolymer alone, or (C1) the olefin copolymer and (C2) the olefin copolymer and / or (C3) It is preferable to include in combination with an olefin copolymer.

The olefin copolymers (C1) to (C3) can be produced by copolymerization by a conventionally known method. For example, the above-mentioned olefin copolymers (C1) to (C3) can be obtained by carrying out copolymerization by a generally well-known radical polymerization reaction. The type of olefinic copolymer is not particularly limited, and may be, for example, a random copolymer or a block copolymer. In addition, the above olefin copolymers include, for example, polymethyl (meth)acrylate, polyethyl (meth)acrylate, polybutyl (meth)acrylate, poly(meth)acrylic acid-2-ethylhexyl, polystyrene, polyacrylonitrile .

In the PAS resin composition of the present embodiment, (C) the olefin copolymer is contained in an amount of 1.0 to 45.0 parts by mass with respect to 100 parts by mass of the PAS resin. If the amount of the olefin copolymer is less than 1.0 parts by mass, it tends to be difficult to sufficiently improve the heat shock resistance. Molding defects tend to occur due to increased gas generation during molding. On the other hand, when the olefinic copolymer (C) is added, the melt viscosity of the resin composition tends to increase, so the burr tends to be shorter than before the addition of the olefinic copolymer. The (C) olefin-based copolymer has a burr suppressing effect in combination with the (B) trifunctional epoxy compound, a balance between fluidity and moldability, and an effect of improving heat shock resistance. It preferably contains 0 to 30.0 parts by mass, more preferably 3.5 to 25.0 parts by mass, even more preferably 4.0 to 20.0 parts by mass, 4.0 to 15.0 parts by mass It is particularly preferred to include

The (C) olefin-based copolymer used in the present embodiment can contain structural units derived from other copolymer components within a range that does not impair its effects.

[(D) inorganic filler]
The PAS resin composition of the present embodiment preferably contains (D) an inorganic filler. Among them, the inorganic filler preferably contains a fibrous inorganic filler because it can further improve mechanical strength, heat shock resistance, heat resistance, and the like. In particular, it is preferable to use a fibrous inorganic filler having a round cross-sectional shape and a fibrous inorganic filler having a flat cross-sectional shape in combination, since the heat shock resistance can be further improved.
In addition, when the inorganic filler (D) is a combination of a fibrous inorganic filler and a plate-like inorganic filler and/or a powder-like inorganic filler, the mechanical strength and flatness can be further improved. preferable.
In the present embodiment, the term “fibrous” refers to a shape having a different diameter ratio of 1 to 4 and an average fiber length (cut length) of 0.01 to 3 mm. The term “plate-like” refers to a shape having a diameter ratio of greater than 4 and an aspect ratio of 1 or more and 500 or less. Furthermore, the term "powder-like" refers to a shape (including a spherical shape) having a different diameter ratio of 1 or more and 4 or less and an aspect ratio of 1 or more and 2 or less. Both shapes are initial shapes (shapes before melt-kneading). The diameter ratio is "major axis of cross section perpendicular to longitudinal direction (longest linear distance of cross section)/minor axis of cross section (longest linear distance perpendicular to major axis)". The aspect ratio is "the longest linear distance in the longitudinal direction/the minor axis of the cross section perpendicular to the longitudinal direction (the longest straight line in the cross section and the longest straight distance in the perpendicular direction)". Both the diameter ratio and the aspect ratio can be calculated using a scanning electron microscope and image processing software. For the average fiber length (cut length), the manufacturer's value (the numerical value published by the manufacturer in a catalog or the like) can be adopted.

Examples of fibrous inorganic fillers include glass fiber, carbon fiber, zinc oxide fiber, titanium oxide fiber, wollastonite, silica fiber, silica-alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, boron fiber, Mineral fibers such as potassium titanate fibers, metal fibrous materials such as stainless steel fibers, aluminum fibers, titanium fibers, copper fibers, and brass fibers can be used, and one or more of these can be used. Among them, glass fiber is preferable.

Examples of commercially available glass fiber products include chopped glass fiber (ECS03T-790DE, average fiber diameter: 6 μm) manufactured by Nippon Electric Glass Co., Ltd., chopped glass fiber (CS03DE 416A, average fiber diameter: 6 μm) manufactured by Owens Corning Manufacturing Co., Ltd. Fiber diameter: 6 μm), manufactured by Nippon Electric Glass Co., Ltd., chopped glass fiber (ECS03T-747H, average fiber diameter: 10.5 μm), manufactured by Nippon Electric Glass Co., Ltd., chopped glass fiber (ECS03T-747, average fiber diameter : 13 μm), Nitto Boseki Co., Ltd., modified cross-section chopped strand CSG 3PA-830 (major axis 28 μm, minor axis 7 μm), Nitto Boseki Co., Ltd., modified cross-section chopped strand CSG 3PL-962 (major axis 20 μm, minor axis 10 μm) ) and the like.

The fibrous inorganic filler may be surface-treated with various surface treatment agents such as generally known epoxy-based compounds, isocyanate-based compounds, silane-based compounds, titanate-based compounds, and fatty acids. Adhesion to the PAS resin can be improved by surface treatment. The surface treatment agent may be applied to the fibrous inorganic filler in advance for surface treatment or convergence treatment prior to material preparation, or may be added at the same time as material preparation.
The fiber diameter of the fibrous inorganic filler is not particularly limited, but can be, for example, 5 μm or more and 30 μm or less in the initial shape (shape before melt-kneading). Here, the fiber diameter of the fibrous inorganic filler refers to the major diameter of the fiber cross section of the fibrous inorganic filler.
The cross-sectional shape of the fibrous inorganic filler is not particularly limited, but examples include a round shape and a flat shape. In addition, fibrous inorganic fillers having different cross-sectional shapes may be used together. The combined use of a fibrous inorganic filler having a round cross-sectional shape and a fibrous inorganic filler having a flat cross-sectional shape is preferable because the heat shock resistance can be further improved.

Examples of plate-like inorganic fillers include glass flakes, talc (plate-like), mica, kaolin, clay, alumina (plate-like), various metal foils, and the like, and one or more of these may be used. can be done. Among them, glass flakes and talc are preferable.
Examples of commercially available glass flakes include REFG-108 (average particle diameter (50% d): 623 μm) manufactured by Nippon Sheet Glass Co., Ltd., Fine Flake (average particle diameter (50% d) manufactured by Nippon Sheet Glass Co., Ltd. d): 169 μm), manufactured by Nippon Sheet Glass Co., Ltd., REFG-301 (average particle size (50% d): 155 μm), manufactured by Nippon Sheet Glass Co., Ltd., REFG-401 (average particle size (50% d): 310 μm ) and the like.
Examples of commercially available talc products include Crown Talc PP manufactured by Matsumura Sangyo Co., Ltd., Talcan Powder PKNN manufactured by Hayashi Kasei Co., Ltd., and the like.
The plate-like inorganic filler may be surface-treated in the same manner as the fibrous inorganic filler.

Granular inorganic fillers include carbon black, silica, quartz powder, glass beads, glass powder, talc (granular), calcium silicate, aluminum silicate, silicates such as diatomaceous earth, iron oxide, titanium oxide, and zinc oxide. , alumina (granular) and other metal oxides, calcium carbonate, magnesium carbonate and other metal carbonates, calcium sulfate, barium sulfate and other metal sulfates, silicon carbide, silicon nitride, boron nitride, and various metal powders. , these can be used alone or in combination of two or more. Among them, calcium carbonate and glass beads are preferred.
Examples of commercially available products of calcium carbonate include Whiten P-30 (average particle size (50%d): 5 μm) manufactured by Toyo Fine Chemical Co., Ltd.). Examples of commercially available glass beads include EGB731A (average particle diameter (50% d): 20 μm) manufactured by Potters Ballotini Co., Ltd., EMB-10 (average particle size diameter (50% d): 5 μm) and the like.
The powdery inorganic filler may also be surface-treated in the same manner as the fibrous inorganic filler.

(D) The inorganic filler is preferably a combination of a fibrous inorganic filler and a plate-like inorganic filler and/or a powdery or granular inorganic filler, since this can further improve mechanical strength and flatness.
Examples of combinations of fibrous inorganic fillers and plate-like inorganic fillers and/or particulate inorganic fillers include glass fibers and glass flakes, glass fibers and calcium carbonate, glass fibers and glass beads, and glass fibers and glass flakes. and calcium carbonate, and a combination of glass fiber and glass fiber with an irregular cross section (flat shape) and calcium carbonate.

In the PAS resin composition of the present embodiment, the (D) inorganic filler is preferably contained in an amount of 5 to 250 parts by mass with respect to 100 parts by mass of the PAS resin. When the inorganic filler is 5 to 250 parts by mass, sufficient mechanical properties and fluidity can be obtained. The inorganic filler is more preferably contained in an amount of 15 to 200 parts by mass, even more preferably 25 to 150 parts by mass, and particularly preferably 30 to 110 parts by mass.

[Other ingredients]
In the present embodiment, in addition to the above components, known additives that are generally added to thermoplastic resins and thermosetting resins in order to impart desired properties according to the purpose, within a range that does not impair the effect release agents, lubricants, plasticizers, flame retardants, coloring agents such as dyes and pigments, crystallization accelerators, crystal nucleating agents, various antioxidants, heat stabilizers, weather stabilizers, corrosion inhibitors An agent or the like may be blended. The PAS resin composition of the present embodiment can suppress the generation of burrs. A burr inhibitor such as a branched polyphenylene sulfide resin having a very high melt viscosity, such as those described in the above, may be used in combination.

[Molded products, insert molded products]
Since the PAS resin composition of the present embodiment is particularly excellent in heat shock resistance, it is useful to apply it to molded articles or insert molded articles that require heat shock resistance.
The method for molding a molded product using the PAS resin composition of the present embodiment is not particularly limited, and various methods known in the technical field can be employed. For example, the PAS resin composition of the present embodiment can be put into an extruder, melt-kneaded and pelletized, and the pellets can be put into an injection molding machine equipped with a predetermined mold and injection molded. can. The resulting molded article has less burrs due to the use of the PAS resin composition of the present embodiment.

Examples of molded articles obtained by molding the PAS resin composition of the present embodiment include electric/electronic equipment parts, automotive equipment parts, chemical equipment parts, water-related parts, and the like. Specifically, various automotive cooling system parts, ignition related parts, distributor parts, various sensor parts, various actuator parts, throttle parts, power module parts, ECU parts, various connector parts, piping joints (pipe joints), joints etc.
In addition, as other applications, for example, LEDs, sensors, sockets, terminal blocks, printed circuit boards, motor parts, electric and electronic parts such as ECU cases, lighting parts, TV parts, rice cooker parts, microwave oven parts, iron parts, It can be used for domestic and office electrical product parts such as copier-related parts, printer-related parts, facsimile-related parts, heaters, and air-conditioner parts.

On the other hand, an insert-molded product is obtained by insert-molding a resin member containing the PAS resin composition of the present embodiment and an insert member containing a metal, alloy or inorganic solid. That is, the insert-molded article of this embodiment has a resin member containing the PAS resin composition of this embodiment and an insert member containing a metal, alloy, or inorganic solid. Since the insert-molded product of the present embodiment contains a PAS resin composition that suppresses the generation of burrs and has excellent heat shock resistance, the resin member has few burrs and has excellent heat shock resistance.

The insert-molded product of this embodiment is a composite molded product obtained by mounting a metal or the like in advance on a molding die and filling the outer side of the mold with the above-described PAS resin composition. Molding methods for filling a mold with a resin include injection molding, extrusion compression molding, and the like, but injection molding is generally used. The shape and size of the insert-molded product are not particularly limited. In addition, since the material to be inserted into the resin is used for the purpose of taking advantage of its properties and compensating for the defects of the resin, a material that does not change shape or melt when it comes into contact with the resin during molding is used. For this reason, metals such as aluminum, magnesium, copper, iron, brass and their alloys, and inorganic solids such as glass and ceramics that have been formed into flat plates, rods, pins, screws, etc., are mainly used. be done. In particular, the shape and the like of the insert member are not limited.
The parts to which the insert-molded product of the present embodiment is applied are the same as those listed in the parts to which the molded product obtained by molding the PAS resin composition of the present embodiment are applied. part of which has an insert member.

EXAMPLES The present embodiment will be described in more detail with reference to examples below, but the interpretation of the present embodiment is not limited by these examples.

[Examples 1 to 4, Comparative Examples 1 to 5]
In each example and comparative example, after dry blending each raw material component shown in Table 1, it was put into a twin-screw extruder with a cylinder temperature of 320 ° C. (glass fiber was added separately from the side feed section of the extruder), and melted. Kneaded and pelletized. In addition, in Table 1, the numerical value of each component shows a mass part.
Further, the details of each raw material component used are shown below.

(1) PAS resin PPS resin: Fortron KPS manufactured by Kureha Co., Ltd. (melt viscosity: 30 Pa s (shear rate: 1200 sec ^-1 , 310 ° C.))

(Measurement of melt viscosity of PPS resin)
The melt viscosity of the PPS resin was measured as follows.
The melt viscosity was measured at a barrel temperature of 310° C. and a shear rate of 1200 sec ⁻¹ using a capilograph manufactured by Toyo Seiki Seisakusho Co., Ltd. using a flat die of 1 mmφ×20 mmL as a capillary.

(2) Epoxy compound Trifunctional epoxy compound: Exemplified compound (1) (manufactured by Mitsubishi Chemical Corporation, jER-630, epoxy equivalent 97.5)
· Bifunctional epoxy compound 1: manufactured by Mitsubishi Chemical Corporation, jER-1004K, epoxy equivalent 925

(3) Olefin-based copolymer Olefin-based copolymer C1 (glycidyl group-containing olefin-based copolymer): Sumitomo Chemical Co., Ltd., Bond Fast (registered trademark) BF-7L (ethylene-glycidyl dimethacrylate-methyl Acrylate copolymer, glycidyl methacrylate content: 3% by mass)
Olefin-based copolymer C2: ethylene-octene copolymer, Engage 8440 manufactured by Dow Chemical Japan Co., Ltd.
- Olefin-based copolymer C3: ethylene ethyl acrylate copolymer, manufactured by NUC Co., Ltd., NUC-6570

(4) Inorganic filler Glass fiber: Chopped strand ECS 03 T-747H manufactured by Nippon Electric Glass Co., Ltd. (fiber diameter: 10.5 μm, length 3 mm)

[evaluation]
The following evaluations were performed using the obtained pellets of Examples and Comparative Examples.
(1) Burr Length was injection molded at the minimum pressure required to completely fill the Then, the length of the burr generated at that portion was measured by enlarging it with a projection projector (manufactured by Mitutoyo Co., Ltd., CNC image measuring machine (model: QVBHU404-PRO1F)). Table 1 shows the measurement results.

(2) Melt viscosity of the resin composition Using a capilograph manufactured by Toyo Seiki Seisakusho Co., Ltd., using a flat die of 1 mmφ × 20 mmL as a capillary, a barrel temperature of 310 ° C., a shear rate of 1000 sec ^-1 Melt viscosity (MV) was measured. Table 1 shows the measurement results.

(3) Heat shock resistance (heat shock resistance test)
First, using the pellets obtained in Examples and Comparative Examples and metal insert members, test pieces shown in FIGS. 1 to 3 were insert-molded. FIG. 1 is a diagram showing an insert-molded test piece 1, FIG. 2 is a diagram showing an insert member 11, and FIG. As shown in FIG. 1, the test piece 1 is molded in a state in which a metal insert member 11 is embedded in a cylindrical resin member 10 made of a resin composition. The cylindrical resin member 10 is molded using the pellets obtained as described above. As shown in FIG. 2, the insert member 11 is columnar, and the top and bottom surfaces thereof are teardrop-shaped with one side being arc-shaped and the other side being acute-angled. As shown in FIG. 1(b), which is a partially enlarged view, the acute-angled portion has an arcuate tip with a radius of curvature r of 0.2 mm. The insert member 11 is higher than the columnar resin member 10, and a part of the insert member 11 protrudes (see FIG. 1(a)). Furthermore, as shown in FIG. 3(a), the center O1 of the circle formed by the arc of the insert member 11 does not coincide with the center O2 of the circle of the resin member 10, and the acute-angled side of the insert member 11 is made of resin. It is arranged so as to be close to the side surface of the member 10 . The distance dw between the acute-angled tip of the insert member 11 and the side surface of the resin member 10 is 1 mm. there is In addition, although the dimensions of the test piece are shown in FIG. 3, the unit is mm.

Using a thermal shock tester (manufactured by Espec Co., Ltd.), the test piece was repeatedly cooled at -40 ° C. for 1.5 hours and then heated at 180 ° C. for 1.5 hours. The weld part was observed at The number of cycles at which cracks occurred in the weld portion was evaluated as an index of heat shock resistance. Table 1 shows the evaluation results.

From Table 1, it can be seen that in Examples 1 to 4, it was possible to achieve both suppression of burr generation and excellent heat shock resistance.
Moreover, from the comparison with Example 1 containing a trifunctional epoxy compound, Comparative Example 1 containing no epoxy compound, and Comparative Example 4 containing a bifunctional epoxy compound, it was found that burrs were reduced by containing a trifunctional epoxy compound. It can be seen that the occurrence is suppressed. In particular, from the comparison between Example 1 and Comparative Example 4 and Example 2 and Comparative Example 5, which differ only in whether they contain a trifunctional epoxy compound or a difunctional epoxy compound, It can be seen that the trifunctional epoxy compound is more effective in suppressing burrs.
Furthermore, from a comparison of Example 1 and Comparative Example 2, which are almost the same except for the presence or absence of (C) the olefin copolymer, the use of (C) the olefin copolymer results in excellent heat shock resistance. I understand.
On the other hand, Comparative Example 2 has a long burr length even though it contains a trifunctional epoxy compound. It is speculated that this is because in Comparative Example 2, since the (C) olefin copolymer was not contained, there was no increase in viscosity due to the (C) olefin copolymer C component, and the burr length was increased accordingly. . In addition, from the comparison between Comparative Example 3 containing neither the trifunctional epoxy compound nor the (C) olefin copolymer and Comparative Examples 1 and 2 containing either one of them, it was found that only the trifunctional epoxy compound was resistant to It can be seen that the heat shock resistance is poor, and the heat shock resistance is good with only the olefin copolymer (C), but the generation of burrs cannot be suppressed.

1 test piece 10 resin member 11 insert member

Claims (9)

(A) With respect to 100 parts by mass of a polyarylene sulfide resin having a terminal carboxyl group and having a melt viscosity of 5 to 500 Pa s measured at a temperature of 310°C and a shear rate of 1200 sec ^-1 ,
(B) 0.1 to 1.7 parts by mass of a trifunctional epoxy compound,
(C) 1.0 to 45.0 parts by mass of an olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms,
A polyarylene sulfide resin composition, wherein the (B) trifunctional epoxy compound is a compound represented by the following general formula (1).

[In general formula (1), X, Y and Z each independently represent a single bond or a divalent linking group. ] The polyarylene sulfide resin composition according to claim 1, further comprising (D) 5 to 250 parts by mass of an inorganic filler with respect to 100 parts by mass of the (A) polyarylene sulfide resin. 3. The polyarylene sulfide resin composition according to claim 2, wherein the (D) inorganic filler is a fibrous inorganic filler. 3. The polyarylene sulfide resin composition according to claim 2, wherein the (D) inorganic filler is a combination of a fibrous inorganic filler and a plate-like inorganic filler and/or a powdery or granular inorganic filler. (C) the olefin-based copolymer containing a structural unit derived from an α-olefin having 2 or more carbon atoms,
(C1) amino group, carboxyl group, hydroxyl group, acid anhydride group, epoxy group, glycidyl group, isocyanate group, isothiocyanate group, acetoxy group, silanol group, alkoxysilane group, alkynyl group, oxazoline group, thiol group, sulfonic acid an olefinic copolymer containing at least one functional group selected from the group consisting of groups, sulfonate residues, and carboxylic acid ester groups;
(C2) an olefin-based copolymer containing an ethylene-derived structural unit and an α-olefin-derived structural unit having 3 or more carbon atoms, and (C3) an α-olefin-derived structural unit having 2 or more carbon atoms an olefinic copolymer containing a structural unit derived from an α,β-unsaturated carboxylic acid alkyl ester;
The polyarylene sulfide resin composition according to any one of claims 1 to 4, which is at least one olefinic copolymer selected from the group consisting of: 6. The polyarylene sulfide resin composition according to claim 5, wherein the (C1) olefinic copolymer contains structural units derived from glycidyl esters of α,β-unsaturated acids. The (C1) olefinic copolymer is at least one olefinic copolymer selected from the group consisting of maleic anhydride-modified ethylene copolymers, glycidyl methacrylate-modified ethylene copolymers, and glycidyl ether-modified ethylene copolymers. 6. The polyarylene sulfide resin composition of claim 5, which is coalesced. 6. The polyarylene sulfide resin composition according to claim 5, wherein the (C1) olefin copolymer further contains a structural unit derived from a (meth)acrylic acid alkyl ester. An insert molded article comprising a resin member containing the polyarylene sulfide resin composition according to any one of claims 1 to 4 and an insert member containing a metal, alloy or inorganic solid.

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