Polyarylene sulfide resin composition, molded article, and method for producing same

Abstract

Provided are: a polyarylene sulfide (PAS) molded article having excellent flowability, thermal conductivity, and electrical conductivity; a PAS resin composition capable of providing the molded article; and a method for producing the same. The present invention relates to a PAS resin composition and a molded article, and more specifically, to a PAS resin composition obtained by blending a PAS resin (A), flake graphite (B), and conductive carbon black (C), the PAS resin (A) having a melt viscosity (V6) in the range of 5-45 (Pa * s), the conductive carbon black (C) being a furnace carbon black having a specific surface area of 50-300 (m2 / g), and the conductive carbon black (C) being a carbon black having a specific surface area of 50-300 (m2 / g). The PAS resin composition is characterized by comprising 100-230 parts by mass of flake graphite (B) and 1-30 parts by mass of conductive carbon black (C) per 100 parts by mass of the PAS resin (A), and the melt viscosity of the PAS resin composition is in the range of 100-400 (Pa * s).

Description

Technical Field

[0001] The present disclosure relates to a polyarylene sulfide resin composition, a polyarylene sulfide resin molded article, and a method for producing the same. Background Art

[0002] With the miniaturization, high performance and high power of on-board electrical components and mobile terminals on hybrid vehicles, electric vehicles, etc., there is an increasing demand for high thermal conductivity materials that can suppress the degradation of components caused by heat or the reduction of product performance. In addition, the types and uses of components mounted on vehicles and devices tend to increase in accordance with the high functionality. In order to prevent these from interfering with each other, it is required to use conductive materials. Furthermore, in order to achieve lightweighting of various components, attempts to replace metal with resin materials are also active.

[0003] On the other hand, polyarylene sulfide (hereinafter referred to as PAS) resins represented by polyphenylene sulfide (hereinafter referred to as PPS) resins have excellent heat resistance, mechanical strength, chemical resistance, molding processability, and dimensional stability, and are therefore widely used in the fields of automobile parts, electric and electronic products, etc. PAS resins lack thermal conductivity and electrical conductivity when used alone, but can be given thermal conductivity and electrical conductivity by forming a composition with other materials, such as carbon-based materials.

[0004] For example, a resin composition is disclosed, which contains: 1 to 30 parts by weight of carbon fiber, 1 to 40 parts by weight of graphite, and 30 to 98 parts by weight of polyarylene sulfide resin (Patent Document 1). In addition, a thermally conductive resin composition is disclosed, which contains: 30 to 90% by weight of polyphenylene sulfide resin and 10 to 70% by weight of flaky graphite (Patent Document 2). Furthermore, a resin composition is disclosed, which contains 40 to 98.5% by weight of polyarylene sulfide, 1 to 40% by weight of a carbon precursor, and 0.5 to 30% by weight of graphite or conductive carbon black (Patent Document 3).

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: International Publication No. 2016 / 063855 Pamphlet

[0008] Patent Document 2: International Publication No. 2015 / 190324 Pamphlet

[0009] Patent Document 3: Japanese Patent Application Publication No. 2011-006707 Summary of the invention

[0010] Problem that the invention aims to solve

[0011] However, in order to significantly improve thermal conductivity and electrical conductivity in these methods, high filling of carbon-based materials is required. When a resin is highly filled with carbon-based materials, the melt viscosity of the resin composition tends to increase due to the interaction between the materials. Therefore, it is difficult to maintain the fluidity required during melt kneading and molding processing and to achieve high thermal conductivity and high electrical conductivity.

[0012] Therefore, the problem to be solved by the present disclosure is to provide a PAS molded product having excellent fluidity, thermal conductivity, and electrical conductivity, a PAS resin composition capable of providing the molded product, and a method for producing the same.

[0013] Solutions for solving problems

[0014] The present inventors have conducted intensive research to solve the above-mentioned problems and have found that by blending a PAS resin (A) with a specific melt viscosity, flaky graphite (B) and furnace black having a specific specific surface area, i.e., conductive carbon black (C), as essential components, excellent fluidity can be achieved while excellent thermal conductivity and electrical conductivity are achieved, thereby completing the present disclosure.

[0015] That is, the present disclosure relates to a PAS resin composition, which is a PAS resin composition prepared by mixing a PAS resin (A), flaky graphite (B) and conductive carbon black (C) as essential components.

[0016] The melt viscosity (V6) of the PAS resin (A) is in the range of 5 to 45 [Pa·s],

[0017] The conductive carbon black (C) has a specific surface area of ​​50 to 300 m 2 / g〕furnace black,

[0018] The flaky graphite (B) is contained in an amount of 100 to 230 parts by mass and the conductive carbon black (C) is contained in an amount of 1 to 30 parts by mass relative to 100 parts by mass of the PAS resin (A).

[0019] The melt viscosity (R) of the PAS resin composition is in the range of 100 to 400 [Pa·s].

[0020] The present disclosure also relates to a method for producing a PAS resin composition, comprising the steps of: blending a PAS resin (A), flaky graphite (B), and conductive carbon black (C) as essential components, and melt-kneading the mixture at a temperature above the melting point of the PAS resin;

[0021] The melt viscosity (V6) of the PAS resin (A) is in the range of 5 to 45 [Pa·s],

[0022] The conductive carbon black (C) has a specific surface area of ​​50 to 300 m2 / g〕furnace black, and

[0023] The flaky graphite (B) is contained in an amount of 100 to 230 parts by mass and the conductive carbon black (C) is contained in an amount of 1 to 30 parts by mass relative to 100 parts by mass of the PAS resin (A).

[0024] The melt viscosity (R) of the PAS resin composition is in the range of 100 to 400 [Pa·s].

[0025] Effects of the Invention

[0026] According to the present disclosure, it is possible to provide a PAS resin molded product having excellent fluidity and excellent thermal conductivity and electrical conductivity, a PAS resin composition capable of providing the molded product, and a method for producing the same. DETAILED DESCRIPTION

[0027] Hereinafter, one embodiment of the present disclosure is described in detail, but the scope of the present disclosure is not limited to the one embodiment described herein, and various changes can be made within the scope of the main purpose of the present disclosure. In addition, when multiple upper limits and lower limits are recorded for a specific parameter, any upper limit and lower limit can be combined within these upper limits and lower limits to form a suitable numerical range.

[0028] The PAS resin composition of the present embodiment is characterized in that it is a PAS resin composition obtained by mixing a PAS resin (A), flaky graphite (B) and conductive carbon black (C) as essential components.

[0029] The melt viscosity (V6) of the PAS resin (A) is in the range of 5 to 45 [Pa·s],

[0030] The conductive carbon black (C) has a specific surface area of ​​50 to 300 m 2 / g〕furnace black,

[0031] The amount of the flaky graphite (B) is 100 to 230 parts by mass, and the amount of the conductive carbon black (C) is 1 to 30 parts by mass, based on 100 parts by mass of the PAS resin (A).

[0032] <PAS resin (A)>

[0033] The PAS resin composition of the present embodiment contains a PAS resin (A) as an essential component.

[0034] The PAS resin (A) has a resin structure having a structure in which an aromatic ring and a sulfur atom are bonded as a repeating unit, and specifically, a resin having a structural part represented by the following general formula (1) and, if necessary, a trifunctional structural part represented by the following general formula (2) as a repeating unit.

[0035]

[0036] (In formula (1), R 1 and R 2 Each independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a nitro group, an amino group, a phenyl group, a methoxy group, or an ethoxy group.

[0037]

[0038] The trifunctional structural part represented by formula (2) is preferably in the range of 0.001 to 3 mol %, particularly preferably in the range of 0.01 to 1 mol %, based on the total molar number of the trifunctional structural part and other structural parts.

[0039] Here, regarding the structural part represented by the general formula (1), from the viewpoint of the mechanical strength of the PAS resin (A), R in the formula is 1 and R 2 A hydrogen atom is particularly preferred, and in this case, examples thereof include a hydrogen atom bonded at the para position as shown in the following formula (3) and a hydrogen atom bonded at the meta position as shown in the following formula (4).

[0040]

[0041] Among these, in terms of heat resistance and crystallinity of the PAS resin, it is particularly preferred that the bond between the sulfur atom and the aromatic ring in the repeating unit is a structure in which the bond is at the para position as represented by the general formula (3).

[0042] The PAS resin (A) may contain not only the structural moieties represented by the general formulae (1) and (2) but also structural moieties represented by the following structural formulae (5) to (8) in an amount of 30 mol% or less of the total of the structural moieties represented by the general formulae (1) and (2).

[0043]

[0044] From the perspective of heat resistance and mechanical strength of the PAS resin (A), it is particularly preferred that the structural parts represented by the general formulae (5) to (8) are 10 mol% or less in the present disclosure. When the PAS resin (A) contains the structural parts represented by the general formulae (5) to (8), the bonding method thereof may be any of a random copolymer and a block copolymer.

[0045] The PAS resin (A) may have a naphthyl sulfide bond or the like in its molecular structure, but the proportion thereof is preferably 3 mol% or less, particularly preferably 1 mol% or less, based on the total molar number of other structural parts.

[0046] The physical properties of the PAS resin (A) are not particularly limited unless the effects of the present invention are impaired, and are as follows.

[0047] (Melt viscosity (V6))

[0048] The melt viscosity of the PAS resin (A) used in the present disclosure is not particularly limited. From the perspective of achieving a good balance between fluidity and mechanical strength, the melt viscosity (V6) measured at 300°C is preferably in the range of 5 Pa·s or more, more preferably in the range of 10 Pa·s or more, and preferably in the range of 45 Pa·s or less, more preferably in the range of 40 Pa·s or less. The melt viscosity (V6) is measured by using a flow tester, CFT-500D manufactured by Shimadzu Corporation, on the PAS resin at 300°C and a load of 1.96×10 6 Pa, L / D = 10 (mm) / 1 (mm) after maintaining for 6 minutes measured melt viscosity.

[0049] (Non-Newtonian index)

[0050] The non-Newtonian index of the PAS resin (A) used in the present disclosure is not particularly limited, and is preferably in the range of 0.90 to 2.00. In the case of using a linear PAS resin, the non-Newtonian index is preferably in the range of 0.90 or more, more preferably in the range of 0.95 or more, preferably in the range of 1.50 or less, and more preferably in the range of 1.20 or less. Such PAS resin (A) has excellent mechanical properties, fluidity, and abrasion resistance. Among them, the non-Newtonian index (N value) in the present disclosure is the following value: using a capillary rheometer, under the conditions of melting point + 20°C, orifice length (L) and orifice diameter (D) ratio L / D = 40, the shear rate (SR) and shear stress (SS) are measured, and the value is calculated using the following formula. The closer the non-Newtonian index (N value) is to 1, the closer it is to a linear structure, and the higher the non-Newtonian index (N value), the more branched the structure.

[0051] SR=K·SS N

[0052] [SR represents the shear rate (seconds) -1 ), SS represents shear stress (dyne / cm 2 ), and K represents a constant. ]

[0053] (Manufacturing method)

[0054] The method for producing the PAS resin (A) is not particularly limited, and examples thereof include the following methods: (Production method 1) a method of adding a dihalogenated aromatic compound, a polyhalogenated aromatic compound as required, and / or other copolymerization components in the presence of sulfur and sodium carbonate, and polymerizing the same; (Production method 2) a method of adding a dihalogenated aromatic compound, a polyhalogenated aromatic compound as required, and / or other copolymerization components in a polar solvent in the presence of a thioetherifying agent, and polymerizing the same; (Production method 3) a method of adding p-chlorothiophenol and other copolymerization components as required, and performing self-condensation; (Production method 4) a method of melt-polymerizing a diiodide aromatic compound and elemental sulfur under reduced pressure in the presence of a polymerization inhibitor optionally having functional groups such as carboxyl groups and amino groups; etc. Among these methods, the method of (Production method 2) is general and preferred. During the reaction, an alkali metal salt of a carboxylic acid or a sulfonic acid, or an alkali metal hydroxide may be added to adjust the degree of polymerization. Among the above-mentioned methods (production method 2), the method of producing the PAS resin by introducing an aqueous thioetherification agent into a mixture containing a heated organic polar solvent and a dihalogenated aromatic compound at a rate at which water can be removed from the reaction mixture, adding the dihalogenated aromatic compound and the thioetherification agent, and, if necessary, a polyhalogenated aromatic compound to the organic polar solvent and reacting them, and controlling the amount of water in the reaction system to be in the range of 0.02 to 0.5 mol relative to 1 mol of the organic polar solvent (see Japanese Patent Application Laid-Open No. 07-2286-1999) is particularly preferred. 99 Gazette); a method in which a dihalogenated aromatic compound and, if necessary, a polyhalogenated aromatic compound and / or other copolymerization components are added in the presence of a solid alkali metal sulfide and a non-protonic polar organic solvent, while controlling the amount of the organic acid alkali metal salt to be in the range of 0.01 to 0.9 mol relative to 1 mol of the sulfur source and controlling the amount of water in the reaction system to be in the range of 0.02 mol or less relative to 1 mol of the non-protonic polar organic solvent, and reacting the alkali metal hydrosulfide with the organic acid alkali metal salt (see WO2010 / 058713 Pamphlet).Specific examples of the dihalogenated aromatic compound include p-dihalobenzene, m-dihalobenzene, o-dihalobenzene, 2,5-dihalotoluene, 1,4-dihalonaphthalene, 1-methoxy-2,5-dihalobenzene, 4,4'-dihalobiphenyl, 3,5-dihalobenzoic acid, 2,4-dihalobenzoic acid, 2,5-dihalonitrobenzene, 2,4-dihalonitrobenzene, 2,4-dihaloanisole, p,p'-dihalodiphenyl ether, and 4,4'-dihalobenzophenone. , 4,4'-dihalogenodiphenyl sulfone, 4,4'-dihalogenodiphenyl sulfoxide, 4,4'-dihalogenodiphenyl sulfide, and compounds having an alkyl group with a carbon number of 1 to 18 on the aromatic ring of each of the above compounds. As polyhalogenated aromatic compounds, 1,2,3-trihalogenobenzene, 1,2,4-trihalogenobenzene, 1,3,5-trihalogenobenzene, 1,2,3,5-tetrahalogenobenzene, 1,2,4,5-tetrahalogenobenzene, 1,4,6-trihalonaphthalene, etc. can be cited. In addition, the halogen atoms contained in each of the above compounds are preferably chlorine atoms or bromine atoms.

[0055] The post-treatment method of the reaction mixture containing the PAS resin (A) obtained by the polymerization step is not particularly limited, and examples thereof include the following methods: (Post-treatment 1) After the polymerization reaction is completed, first, the reaction mixture is directly subjected to distillation under reduced pressure or normal pressure to remove the solvent, or an acid or a base is added and then the solvent is removed under reduced pressure or normal pressure, and then the solid matter after the solvent is removed is washed once or twice or more with a solvent such as water, a reaction solvent (or an organic solvent having an equivalent solubility to the low molecular weight polymer), acetone, methyl ethyl ketone, alcohols, etc.), and then neutralized, washed with water, filtered, and dried; or (Post-treatment 2) After the polymerization reaction is completed, a solvent such as water, acetone, methyl ethyl ketone, alcohols, ethers, halogenated hydrocarbons, aromatic hydrocarbons, aliphatic hydrocarbons, etc. (a solvent soluble in the polymerization solvent used and at least a poor solvent for PAS) is added to the reaction mixture. ) as a precipitating agent to precipitate solid products such as PAS and inorganic salts, and then filter, wash and dry them; or, (post-treatment 3) after the polymerization reaction is completed, a reaction solvent (or an organic solvent having an equivalent solubility to the low molecular weight polymer) is added to the reaction mixture and stirred, and then the low molecular weight polymer is removed by filtering, and then the reaction mixture is washed once or twice with solvents such as water, acetone, methyl ethyl ketone, alcohols, etc., and then neutralized, washed with water, filtered and dried; (post-treatment 4) after the polymerization reaction is completed, water is added to the reaction mixture, washed with water and filtered, and an acid is added during the water washing as needed, and then the mixture is treated with acid and dried; (post-treatment 5) after the polymerization reaction is completed, the reaction mixture is filtered, washed once or twice with a reaction solvent as needed, and then washed with water, filtered and dried.

[0056] In the post-treatment methods exemplified in (Post-treatment 1) to (Post-treatment 5) above, the drying of the PAS resin may be performed in a vacuum or in an inert gas atmosphere such as air or nitrogen.

[0057] The amount of the PAS resin (A) in the PAS resin composition of the present embodiment is not particularly limited as long as the effects of the present invention are not impaired, and is preferably in the range of 20 parts by mass or more, more preferably 25 parts by mass or more, and further preferably 30 parts by mass or more, to preferably 55 parts by mass or less, more preferably 50 parts by mass or less, and further preferably 45 parts by mass or less, relative to 100 parts by mass of the resin composition. In the above range, the resin composition exhibits good mechanical properties, so it is preferred.

[0058] <Flake graphite (B)>

[0059] The PAS resin composition of the present embodiment is prepared by mixing flaky graphite (B) as an essential component. "Flake" in the present disclosure means that the ratio of the thickness to the length of the long side of the surface perpendicular to the thickness direction is 1:5 or more. By using flaky graphite, thermal conductivity can be improved without reducing physical properties such as mechanical strength. When the shape of the aforementioned graphite is not flaky (for example, in the shape of particles, plates, needles, etc.), it is impossible to achieve both mechanical strength and thermal conductivity at a high level.

[0060] Graphite is roughly divided into natural graphite and artificial graphite, and any of these can be used in the present disclosure. As the graphite used in the resin composition of the present disclosure, the one with a fixed carbon content of 95% or more is preferred, and the one with a fixed carbon content of 98% or more is more preferred. In addition, the crystallinity of the graphite is preferably 80% or more, and more preferably 90% or more. By using graphite with a large fixed carbon content and high crystallinity, a resin composition with particularly good thermal conductivity can be obtained.

[0061] The average particle size (D) of the flaky graphite (B) used in the present disclosure is 50 ) is not particularly limited, and the average particle size (D 50 ) is preferably in the range of 5〔μm〕or more, more preferably in the range of 15〔μm〕or more, and is preferably in the range of 300〔μm〕or less, more preferably in the range of 200〔μm〕or less, and further preferably in the range of 100〔μm〕or less. When the particle size of the flaky graphite (B) is within this range, a resin composition having particularly excellent balance between fluidity during melting and mechanical properties can be obtained. It should be noted that the average particle size is an average particle size (D) obtained based on the particle size distribution measured by a laser diffraction scattering particle size distribution measuring machine (Microtrac MT3300EXII) according to a conventional method. 50 ).

[0062] The amount of the flaky graphite (B) in the PAS resin composition disclosed herein is not particularly limited as long as the effects of the present invention are not impaired, but is preferably in the range of 30 parts by mass or more, more preferably 40 parts by mass or more, to preferably 70 parts by mass or less, more preferably 60 parts by mass or less, relative to 100 parts by mass of the resin composition. Within the above range, the resin composition has good fluidity and the thermal conductivity of the molded article is excellent, which is preferred.

[0063] <Conductive carbon black (C)>

[0064] The PAS resin composition of the present embodiment is compounded with conductive carbon black (C) as an essential component.

[0065] The conductive carbon black (C) used in the present disclosure has a specific surface area of ​​50 to 300 m 2 / g〕of carbon black produced by a furnace process (furnace black). The specific surface area is 50〔m 2 / g] or more, preferably 100〔m 2 / g] or more, more preferably 200〔m / g〕 2 In addition, the specific surface area is preferably 300 [m 2 Within the above range, a resin composition having excellent balance between conductivity and fluidity can be obtained. It should be noted that the specific surface area is a BET specific surface area measured using "TriStar II3020" manufactured by Shimadzu Corporation.

[0066] The primary particle size of the conductive carbon black (C) used in the present disclosure is not particularly limited as long as it does not impair the effect of the present invention, and the preferred primary particle size is in the range of 20 to 50 [nm]. Within the above range, the balance between conductivity and fluidity is excellent, so it is preferred. It should be noted that the primary particle size is an average value obtained by observing and measuring at least 5 or more samples using a transmission electron microscope.

[0067] The amount of conductive carbon black (C) compounded in the PAS resin composition of the present disclosure is preferably in the range of 1 part by mass or more, more preferably 3 parts by mass or more, to preferably 15 parts by mass or less, more preferably 10 parts by mass or less, relative to 100 parts by mass of the resin composition. Within the above range, the resin composition has good fluidity and the conductivity of the molded article is excellent, which is preferred.

[0068] <Optional Ingredients>

[0069] The PAS resin composition of the present embodiment can be mixed with a fibrous filler as an optional component within the range that does not damage the effect of the present invention. As these fibrous fillers, known commonly used materials can also be used as long as the effect of the present invention is not damaged, for example, glass fiber, carbon fiber, silane glass fiber, ceramic fiber, aramid fiber, metal fiber, etc. can be used. In the case of mixing a fibrous filler, its blending amount is relative to 100 mass parts of the aforementioned flaky graphite (B), preferably 50 mass parts or less, more preferably 30 mass parts or less. Within the above range, a molded product with more excellent mechanical properties can be obtained.

[0070] The PAS resin composition of the present embodiment may be blended with a non-fibrous filler as an optional component within the range that does not impair the effects of the present invention. For example, fillers in various shapes such as plate-like and spherical shapes may be cited. Specifically, non-fibrous fillers such as glass beads, glass flakes, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, clay, pyrophyllite, bentonite, sericite, mica, talc, attapulgite, ferrite, calcium silicate, zeolite, and boehmite may be used.

[0071] In the present disclosure, non-fibrous filler is not an essential component, but in the case of mixing, its mixing amount is not particularly limited as long as it does not damage the effect of the present invention. As the mixing amount of other fillers, for example, relative to 100 parts by mass of PAS resin (A), preferably 1 part by mass or more, more preferably 5 parts by mass or more, preferably 600 parts by mass or less, more preferably 200 parts by mass or less. Within the above range, the resin combination shows good moldability, and the mechanical properties of the molded product are excellent, so it is preferred.

[0072] The PAS resin composition of the present embodiment can be blended with a silane coupling agent as an optional component as needed. As the silane coupling agent, there is no particular limitation as long as it does not impair the effect of the present invention, and a silane coupling agent having a functional group that reacts with a carboxyl group, such as an epoxy group, an isocyanate group, an amino group or a hydroxyl group can be cited as a preferred example. As such a silane coupling agent, for example, epoxy-containing alkoxysilane compounds such as γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, γ-isocyanatepropyltrimethoxysilane, γ-isocyanatepropyltriethoxysilane, γ-isocyanatepropylmethyldimethoxysilane, γ-isocyanatepropylmethyldiethoxysilane, γ-isocyanatepropylethyl Alkoxysilane compounds containing isocyanate groups such as dimethoxysilane, γ-isocyanatepropylethyldiethoxysilane, and γ-isocyanatepropyltrichlorosilane, alkoxysilane compounds containing amino groups such as γ-(2-aminoethyl)aminopropylmethyldimethoxysilane, γ-(2-aminoethyl)aminopropyltrimethoxysilane, and γ-aminopropyltrimethoxysilane, and alkoxysilane compounds containing hydroxy groups such as γ-hydroxypropyltrimethoxysilane and γ-hydroxypropyltriethoxysilane.

[0073] In the present disclosure, the silane coupling agent is not an essential component, but when it is blended, its blending amount is not particularly limited as long as it does not impair the effect of the present invention, and is preferably in the range of 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, to preferably 10 parts by mass or less, more preferably 5 parts by mass or less, relative to 100 parts by mass of the PAS resin (A). Within the above range, the resin composition has good moldability, especially demoldability, and the mechanical strength of the molded product is improved, so it is preferred.

[0074] The PAS resin composition of the present embodiment can be blended with a thermoplastic elastomer as an optional component as needed. As a thermoplastic elastomer, a polyolefin elastomer, a fluorine-based elastomer or a silicone-based elastomer can be cited, wherein a polyolefin elastomer can be cited as a preferred example. When these elastomers are added, the amount thereof is not particularly limited as long as it does not damage the effect of the present invention, and relative to 100 parts by mass of PAS resin (A), preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more to preferably 10 parts by mass or less, more preferably 5 parts by mass or less. Within the above range, the impact resistance of the obtained PAS resin composition is improved, so it is preferred.

[0075] For example, the polyolefin elastomer may include a homopolymer of α-olefin, a copolymer of two or more α-olefins, or a copolymer of one or more α-olefins and a vinyl polymerizable compound having a functional group. In this case, examples of the α-olefin include ethylene, propylene, 1-butene, and other α-olefins having a carbon number ranging from 2 to 8. In addition, examples of the functional group include a carboxyl group, an acid anhydride group (-C(=O)OC(=O)-), an epoxy group, an amino group, a hydroxyl group, a mercapto group, an isocyanate group, and an oxazoline group. Furthermore, examples of the vinyl polymerizable compound having a functional group include vinyl acetate; α,β-unsaturated carboxylic acids such as (meth) acrylic acid; alkyl esters of α,β-unsaturated carboxylic acids such as methyl acrylate, ethyl acrylate, and butyl acrylate; metal salts of α,β-unsaturated carboxylic acids such as ionomers (metals are alkali metals such as sodium, alkaline earth metals such as calcium, and zinc); glycidyl esters of α,β-unsaturated carboxylic acids such as glycidyl methacrylate; α,β-unsaturated dicarboxylic acids such as maleic acid, fumaric acid, and itaconic acid; and derivatives of the α,β-unsaturated dicarboxylic acids (monoesters, diesters, and anhydrides) of the above-mentioned α,β-unsaturated dicarboxylic acids, or one or more of the above-mentioned thermoplastic elastomers. The above-mentioned thermoplastic elastomers may be used alone or in combination of two or more.

[0076] Furthermore, in the PAS resin composition of the present embodiment, on the basis of the above-mentioned ingredients, polyester resin, polyamide resin, polyimide resin, polyetherimide resin, polycarbonate resin, polyphenylene ether resin, polysulfone resin, polyethersulfone resin, polyetheretherketone resin, polyetherketone resin, polyarylate resin, polyethylene resin, polypropylene resin, polytetrafluoroethylene resin, polyvinylidene fluoride resin, polystyrene resin, ABS resin, epoxy resin, phenolic resin, urethane resin, liquid crystal polymer and other synthetic resins (hereinafter referred to as synthetic resins) can be further appropriately mixed as optional components according to the application. When mixing with fluorine-based resins, the sliding property is further improved, so it is particularly preferred.

[0077] In the present disclosure, the synthetic resin is not an essential component. When blended, the blending ratio is not particularly limited as long as the effect of the present invention is not impaired. In addition, it varies according to the respective purposes and cannot be generalized. As the ratio of the synthetic resin blended in the resin composition of the present disclosure, for example, it can be cited that it is in the range of 5 parts by mass or more and 15 parts by mass or less relative to 100 parts by mass of the PAS resin. In other words, the ratio of the PAS resin relative to the total of the PAS resin (A) and the synthetic resin is preferably in the range of (100 / 115) or more, and more preferably in the range of (100 / 105) or more on a mass basis.

[0078] In addition, in the PAS resin composition of the present embodiment, in addition to this, known and commonly used additives such as colorants, antistatic agents, antioxidants, heat stabilizers, ultraviolet stabilizers, ultraviolet absorbers, foaming agents, flame retardants, flame retardant aids, rust inhibitors, and mold release agents (including metal salts of fatty acids with 18 to 30 carbon atoms such as stearic acid and montanic acid, esters, polyethylene and other polyolefin waxes, etc.) can also be blended as optional components as needed. These additives are not essential components. For example, in order not to impair the effect of the present invention, they can be used in a range preferably of 0.01 parts by mass or more, preferably 1000 parts by mass or less, more preferably 100 parts by mass or less, and further preferably 10 parts by mass or less, according to the purpose and application, and are appropriately adjusted.

[0079] The melt viscosity (R) of the PAS resin composition of the present embodiment is in the range of 100 to 400 [Pa·s]. In order to make the melt viscosity (R) of the resin composition within the above range, it can be achieved by adjusting the blending amounts of the essential components PAS resin (A), flaky graphite (B) and conductive carbon black (C), and the melt viscosity (V6) of the PAS resin (A). More specifically, for example, if the blending amount of the conductive carbon black (C) increases, the melt viscosity (R) of the resin composition tends to increase, and therefore, it is adjusted by using a PAS resin (A) having a lower melt viscosity (V6). Within the above range, the resin composition has good fluidity during melt kneading and molding, and a molded product with excellent appearance can be obtained. It should be noted that the melt viscosity (R) of the resin composition in the present disclosure is another indicator whose measurement method is different from the melt viscosity (V6) of the above-mentioned PAS resin (A). The melt viscosity (R) of the resin composition in the present disclosure is measured by the method described in the Examples using a capillary rheometer at a temperature of 350° C. and a shear rate of 1216 [s -1 〕, the value measured when the ratio of orifice length (L) to orifice diameter (D) is L / D=40.

[0080] The PAS resin composition of the present embodiment has excellent thermal conductivity. The value of thermal conductivity is not particularly limited, preferably 1.5〔W / m·K〕or more, more preferably 2.0〔W / m·K〕or more. Within the above range, the friction heat generated during sliding, the heat generated from the heat release of adjacent parts, etc. can be effectively released (dissipated), and therefore, the degradation of the mechanical properties of the molded product, such as the reduction, can be suppressed. In addition, by having a thermal conductivity in the above range, the thermal degradation of adjacent parts can also be suppressed. It should be noted that the thermal conductivity in the present disclosure is a value measured in the thickness direction of the molded product according to the method described in the examples and in accordance with JIS R 1611 "Determination of thermal diffusivity / specific heat capacity / thermal conductivity based on the scintillation method of fine ceramics".

[0081] The PAS resin composition of this embodiment has excellent electrical conductivity. The value of the electrical conductivity is not particularly limited, but is preferably 5 [S / cm] or more, more preferably 7 [S / cm] or more, and further preferably 10 [S / cm] or more. Within the above range, the electrical conductivity of the resin composition is excellent, and therefore, the molded product can exhibit an excellent electromagnetic wave shielding effect. It should be noted that the electrical conductivity in the present disclosure is a value calculated from the volume resistance value measured by the method described in the examples.

[0082] <Method for producing PAS resin composition>

[0083] The method for producing a PAS resin composition according to the present embodiment is characterized by comprising the steps of: blending a PAS resin (A), flaky graphite (B) and conductive carbon black (C), and melt-kneading them at a temperature above the melting point of the PAS resin, wherein the melt viscosity (V6) of the PAS resin (A) is in the range of 5 to 45 [Pa·s], and the conductive carbon black (C) has a specific surface area of ​​50 to 300 [m 2 / g〕furnace black, and relative to 100 parts by mass of the PAS resin (A), 100 to 230 parts by mass of flaky graphite (B) and 1 to 30 parts by mass of conductive carbon black (C), and the melt viscosity (R) of the PAS resin composition is in the range of 100 to 400〔Pa·s〕. The details are described below.

[0084] The manufacturing method of the PAS resin composition of the present embodiment has the following steps: blending the above-mentioned essential components and melt-kneading in a temperature range above the melting point of the PAS resin (A). In more detail, the PAS resin composition of the present embodiment is blended with each essential component and other optional components as needed. As a method for manufacturing the resin composition used in the present disclosure, there is no particular limitation, and the following method can be cited: blending the essential components and the optional components as needed and melt-kneading, and in more detail, the following method can be cited: uniformly dry-mixing in a rotary drum or a Henschel mixer as needed, and then, putting it into a twin-screw extruder for melt-kneading.

[0085] Melt kneading can be carried out by heating the resin temperature to a temperature range of not less than the melting point of the PAS resin (A), preferably not less than the melting point + 10°C, more preferably not less than the melting point + 10°C, further preferably not less than the melting point + 20°C, preferably not more than the melting point + 100°C, more preferably not more than the melting point + 50°C.

[0086] As the aforementioned melt kneader, from the viewpoint of dispersibility and productivity, a twin-screw kneading extruder is preferred. For example, it is preferred to perform melt kneading while appropriately adjusting the discharge amount of the resin component to a range of 5 to 500 (kg / hour) and the screw speed to a range of 50 to 500 (rpm). It is further preferred to perform melt kneading under the condition that their ratio (discharge amount / screw speed) reaches a range of 0.02 to 5 (kg / hr / rpm). In addition, the addition and mixing of each component to the melt kneader can be performed simultaneously or in batches. For example, when adding graphite (B) which is an essential component of the aforementioned components and other fibrous fillers as required, it is preferred to feed them into the extruder from the side feeder of the aforementioned twin-screw kneading extruder from the viewpoint of dispersibility. Regarding the position of the side feeder, the ratio of the distance from the resin input part (top feeder) of the extruder to the side feeder relative to the total length of the screw of the aforementioned twin-screw kneading extruder is preferably 0.1 or more, more preferably 0.3 or more. In addition, the ratio is preferably 0.9 or less, and more preferably 0.7 or less.

[0087] The PAS resin composition of the present invention obtained by melt kneading in this way is a molten mixture containing the aforementioned essential components, as well as the optional components added as needed and the components from which they are derived. Therefore, the PAS resin composition of the present invention has a form in which the PAS resin (A) forms a continuous phase and other essential components and optional components are dispersed. The PAS resin composition of the present invention is preferably subjected to a known method after the melt kneading, for example, after the resin composition in a molten state is extruded into a strand shape, it is processed into a form such as pellets, flakes, granules, powder, etc., and then pre-dried at a temperature range of 100 to 150° C. as needed.

[0088] <PAS resin molded article, method for producing PAS resin molded article>

[0089] The molded product of the present embodiment is formed by melt molding the aforementioned PAS resin composition. In addition, the manufacturing method of the molded product of the present embodiment has a process of melt molding the aforementioned PAS resin composition. Therefore, the molded product of the present embodiment has a form in which the PAS resin (A) forms a continuous phase and other essential components and optional components are dispersed. The PAS resin composition has the above-mentioned form, so that a molded product with excellent thermal conductivity and mechanical strength can be obtained.

[0090] The PAS resin composition of the present embodiment can be used for various moldings such as injection molding, compression molding, extrusion molding of composites, sheets, tubes, etc., drawing molding, blow molding, transfer molding, etc., and is particularly suitable for injection molding applications due to its excellent demolding properties. In the case of molding by injection molding, various molding conditions are not particularly limited, and molding can usually be performed by general methods. For example, in an injection molding machine, after the aforementioned PAS resin composition is melted in a temperature range where the resin temperature is above the melting point of the PAS resin (A), preferably in a temperature range of above the melting point + 10°C, more preferably in a temperature range of melting point + 10°C to melting point + 100°C, and further preferably in a temperature range of melting point + 20 to melting point + 50°C, it is injected into the mold from the resin discharge port and molded. At this time, the mold temperature is also set to a known temperature range, such as room temperature (23°C) to 300°C, preferably 130 to 190°C.

[0091] The manufacturing method of the molded product of the present embodiment may also include a step of annealing the aforementioned molded product. The annealing treatment selects the best conditions according to the purpose or shape of the molded product, and the annealing temperature is a temperature range above the glass transition temperature of the PAS resin (A), preferably a temperature range above the glass transition temperature + 10°C, and more preferably a temperature range above the glass transition temperature + 30°C. On the other hand, it is preferably in a range below 260°C, and more preferably in a range below 240°C. The annealing time is not particularly limited, and is preferably in a range of more than 0.5 hours, and more preferably in a range of more than 1 hour. On the other hand, it is preferably in a range of less than 10 hours, and more preferably in a range of less than 8 hours. Within the above range, not only the strain of the obtained molded product is reduced, and the crystallinity of the resin is improved, but also the thermal conductivity, mechanical properties and fuel barrier properties are further improved, so it is preferred. The annealing treatment can be carried out in air, but it is preferably carried out in an inert gas such as nitrogen.

[0092] The PAS resin molded product disclosed in the present invention is characterized by excellent thermal conductivity and electrical conductivity, and is therefore particularly suitable for components (heat dissipation components) that effectively conduct and release heat. Specifically, it can be suitable for heat dissipation components for vehicles such as heat exchangers and heat dissipation plates, heat dissipation components for electronic components, and the like. In addition, the molded product disclosed in the present invention can be formed not only into heat dissipation components, but also into conventional resin molded products such as the following. Examples include box-shaped protection / support components for integrated modules of electrical / electronic components / multiple individual semiconductors or modules, sensors, LED lamps, connectors, sockets, resistors, relay boxes, switches, coil frames, capacitors, variable capacitor boxes, optical pickups, vibrators, various terminal boards, transformers, plugs, printed circuit boards, tuners, loudspeakers, microphones, headphones, small motors, head mounts (head Electric / electronic components represented by VTR components, TV components, irons, hair dryers, rice cooker components, microwave oven components, audio components, audio / optical discs / compact discs / DVD discs / Blu-ray discs and other audio / visual equipment components, lighting components, refrigerator components, air conditioning components, typewriter components, word processor components, or water heaters, bath water volume, temperature sensors and other water-related equipment components, etc.; Mechanical components represented by office computer components, telephone components, fax components, copier components, cleaning tools, motor components, recorders, typewriters, etc.; Optical equipment and precision machinery components represented by microscopes, telescopes, cameras, watches, etc.; Alternator terminals, alternator connectors, brush holders, slip rings, IC regulators, dimmer potentiometer holders, relay components , automatic transmission lock switch, exhaust valve and other valves; various pipelines related to fuel / exhaust system / intake system, intake nozzle connecting pipe, intake manifold, engine cooling water joint, carburetor body, carburetor partition, exhaust gas sensor, cooling water sensor, oil temperature sensor, brake lining wear sensor, throttle position sensor, crankshaft position sensor, temperature sensor, air flow meter, brake lining wear sensor, air conditioner thermostat base, heater hot air flow control valve, radiator motor brush holder, water pump impeller, turbine blade , wiper motor related parts, distributors, starter switches, ignition coils and their coil frames, motor insulators, motor rotors, motor cores, starter relays, transmission harnesses, windshield washer nozzles, air conditioning panel switch substrates, fuel-related solenoid valve coils, fuse connectors, alarm terminals, electrical component insulation boards, stepper motor rotors, lamp holders, lamp reflectors, lamp covers, brake pistons, electromagnetic coil bobbins, engine oil filters, ignition device housings and other automobile / vehicle related parts, and can also be used for various other purposes.

[0093] Example

[0094] Hereinafter, the present invention will be described using Examples and Comparative Examples, but the present invention is not limited to these Examples. It should be noted that "%" and "parts" are based on mass unless otherwise specified.

[0095] <Reference Example, Examples 1 to 5, and Comparative Examples 1 to 4>

[0096] The materials were mixed according to the composition and compounding amount described in Tables 1 and 2. After that, these compounding materials were put into a twin-screw extruder "TEX-30α (product name)" with a vent manufactured by Nippon Steel Works, Ltd., and melt-kneaded at a resin component discharge of 25 kg / hour, a screw speed of 200 rpm, and a set resin temperature of 330°C to obtain pellets of a resin composition. The raw material components were pre-uniformly mixed in a drum and fed from a top feeder. The pellets of the obtained resin composition were dried in a 140°C Gill thermostat for 2 hours and then injection molded to produce various test pieces, and the following tests were carried out.

[0097] <Evaluation>

[0098] (1) Evaluation of fluidity during melt kneading

[0099] The fluidity was evaluated by the kneading torque when the resin composition was melt-kneaded in a twin-screw extruder with a vent in the above method. The resin composition obtained with a kneading torque less than 1.2 times that of the reference example was evaluated as ○, and the resin composition obtained with a kneading torque of more than 1.2 times that of the reference example, which was judged to be unable to be processed by melt kneading, was evaluated as ×. The evaluation results are shown in Tables 1 and 2.

[0100] (2) Determination of thermal conductivity (xenon flash method)

[0101] The pellets of the obtained resin composition were supplied to a Sumitomo Heavy Industries injection molding machine (SE-75D-HP) with the barrel temperature set at 350°C, and injection molded using an ISO D2 sheet molding mold with the mold temperature adjusted to 150°C to obtain an ISO D2 sheet. The obtained sheet was cut into 10 mm × 10 mm × 2 mm as a test piece, and the thermal conductivity (W / m·K) was measured in the thickness direction of the molded product according to JIS R 1611 "Determination of thermal diffusivity / specific heat capacity / thermal conductivity based on the scintillation method of fine ceramics". The measurement results are shown in Tables 1 and 2.

[0102] (3) Evaluation of tensile properties

[0103] The pellets of the obtained resin composition are supplied to a Sumitomo Heavy Industries injection molding machine (SE-75D-HP) with the barrel temperature set at 350°C, and injection molding is performed using an ISO Type 1A dumbbell piece molding mold with the mold temperature adjusted to 150°C to obtain an ISO Type-A dumbbell piece. It should be noted that the test piece is made by injecting resin from a single gate in a manner that does not include a welded portion. For the obtained dumbbell piece, the tensile strength is measured according to the measurement method of ISO 527-1 and 2. The measurement results are shown in Tables 1 and 2.

[0104] (4) Determination of electrical conductivity

[0105] The conductivity was evaluated by the volume resistivity of the obtained resin composition. The volume resistivity was calculated as follows: the volume resistivity of each test piece was measured at room temperature of 21°C and humidity of 67 RH% according to JIS K 7194 "Resistivity test method for conductive plastics based on 4-probe method" using "Loresta AX MCP-T370" manufactured by Nittoseiko Analytech Co., Ltd., and the conductivity was calculated from the obtained value. The test piece used a molded product obtained as follows: the resin composition obtained in each embodiment and comparative example was supplied to a Sumitomo Heavy Industries injection molding machine (SE-75D-HP) with a barrel temperature set to 350°C, and a plate (80 mm×50 mm×2 mmt) molding mold with a mold temperature adjusted to 150°C was used to perform injection molding to obtain a molded product. The measurement results are shown in Tables 1 and 2.

[0106] (5) Determination of melt viscosity (R)

[0107] The resin compositions obtained in the examples and comparative examples were measured at 350°C and a shear rate of 1216 s using a "capillary rheometer 1D" manufactured by Toyo Seiki Seisaku-sho. -1 The melt viscosity (R) after holding for 5 minutes at L / D = 40 (mm) / 1 (mm) is shown in Tables 1 and 2 as "melt viscosity".

[0108] [Table 1]

[0109]

[0110] [Table 2]

[0111]

[0112] ·PAS resin (A)

[0113] A-1: PPS resin (melt viscosity (V6) 15〔Pa·s〕)

[0114] ·Flake graphite (B)

[0115] B-1: "Flake Graphite D-1" manufactured by Nishimura Graphite Co., Ltd., average particle size (D 50 )52.9〔μm〕

[0116] Conductive carbon black (C)

[0117] C-1: furnace carbon black, specific surface area 225〔m 2 / g〕, primary particle size 25〔nm〕

[0118] C-2: furnace carbon black, specific surface area 165〔m 2 / g〕, primary particle size 21〔nm〕

[0119] c-3: "Ketjen Black EC600JD" manufactured by Lion Specialty Chemicals Co., Ltd., with a specific surface area of ​​1270 [m 2 / g〕, primary particle size 34〔nm〕

[0120] c-4: Lionite CB manufactured by Lion Specialty Chemicals Co., Ltd., specific surface area 1052 [m 2 / g〕, primary particle size 40〔nm〕

[0121] Carbon fiber (D)

[0122] D-1: Pitch-based carbon fiber, cut length 0.2 [mm], fiber diameter 11 [μm], tensile modulus 900 [GPa], no sizing agent

[0123] (Manufacturing Example 1) Manufacture of PPS resin (A-1)

[0124] [Process 1]

[0125] In a 150L autoclave with stirring blades connected to a pressure gauge, a thermometer, a condenser, a decanter, and a distillation tower, 35.868 parts by mass (244 parts by mole) of p-dichlorobenzene (p-DCB), 3.420 parts by mass (34.5 parts by mole) of NMP, 27.300 parts by mass of a 47.23% by mass NaSH aqueous solution (230 parts by mole as NaSH), and 18.533 parts by mass of a 49.21% by mass NaOH aqueous solution (228 parts by mole as NaOH) were added, and the temperature was raised to 173°C in 5 hours under a nitrogen atmosphere while stirring, and 27.300 parts by mass of water was distilled off, and then the autoclave was sealed. The p-DCB distilled off by azeotropy during dehydration was separated in the decanter and returned to the autoclave at any time. After the dehydration was completed, the autoclave was in a state where the particulate anhydrous sodium sulfide composition was dispersed in the p-DCB. The NMP content in the composition was 0.079 parts by mass (0.8 parts by mole), indicating that 98 mol% (33.7 parts by mole) of the NMP charged was hydrolyzed into the sodium salt of the ring-opened form of NMP (4-(methylamino)butyric acid) (hereinafter referred to as "SMAB"). The amount of SMAB in the autoclave was 0.147 parts by mole per 1 mole of sulfur atoms present in the autoclave. The theoretical dehydration amount when the total amount of NaSH and NaOH charged becomes anhydrous Na2S is 27.921 parts by mass, indicating that 0.609 parts by mass (33.8 parts by mole) of the residual water in the autoclave of 0.878 parts by mass (48.8 parts by mole) was consumed by the hydrolysis reaction of NMP and NaOH and did not exist in the autoclave in the form of water, and the remaining 0.269 parts by mass (14.9 parts by mole) remained in the autoclave in the form of water or crystal water. The amount of water in the autoclave was 0.065 parts per 1 mole of sulfur atoms present in the autoclave.

[0126] [Process 2]

[0127] After the dehydration step, the internal temperature was cooled to 160°C, 46.343 parts by mass (467.5 parts by mole) of NMP was added, and the temperature was raised to 185°C. The amount of water in the autoclave was 0.025 parts by mass per 1 mole of NMP added in step 2. When the gauge pressure reached 0.00 MPa, the valve connected to the distillation tower was opened, and the temperature was raised to 200°C in 1 hour. At this time, the outlet temperature of the distillation tower was controlled to be below 110°C by cooling and valve opening. The mixed vapor of p-DCB and water distilled out was condensed in the condenser, separated in the decanter, and p-DCB was returned to the autoclave. The amount of distilled water was 0.228 parts by mass (12.7 parts by mole).

[0128] [Process 3]

[0129] The amount of water in the autoclave at the start of step 3 was 0.041 parts by mass (2.3 parts by mole), 0.005 parts by mass per 1 mole of NMP added in step 2, and 0.010 parts by mass per 1 mole of sulfur atoms present in the autoclave. The amount of SMAB in the autoclave was the same as in step 1, and was 0.147 parts by mass per 1 mole of sulfur atoms present in the autoclave. Next, the temperature was raised from 200°C to 230°C in 3 hours, and after stirring at 230°C for 1 hour, the temperature was raised to 250°C and stirred for 1 hour. The gauge pressure at the time of the internal temperature of 200°C was 0.04MPa, and the final gauge pressure was 0.40MPa. After cooling, 0.650 parts by mass of the obtained slurry was injected into 3 parts by mass (3L parts) of water, stirred at 80°C for 1 hour, and filtered. The filter cake was stirred again in 3 parts by mass (3L parts) of hot water for 1 hour, washed, and filtered. Repeat this operation 4 times. The filter cake was added again to 3 parts by mass (3L) of hot water and acetic acid, adjusted to pH 4.0, stirred for 1 hour, washed, and filtered. The filter cake was stirred again in 3 parts by mass (3L) of hot water for 1 hour, washed, and filtered. Repeat this operation twice. Use a hot air dryer to dry overnight at 120°C to obtain a white powdery PPS resin (A-1). The melt viscosity (V6) of the polymer is 15 Pa·s. The non-Newtonian index is 1.07.

[0130] Tables 1 and 2 show that the molded articles formed from the resin compositions of the examples have excellent fluidity, high thermal conductivity and high electrical conductivity compared to the comparative examples.

Claims

1. A polyarylene sulfide resin composition, which is a polyarylene sulfide resin composition prepared by mixing a polyarylene sulfide resin (A), flaky graphite (B) and conductive carbon black (C) as essential ingredients, The melt viscosity (V6) of the polyarylene sulfide resin (A) is in the range of 5 to 45 [Pa·s], The conductive carbon black (C) has a specific surface area of ​​50 to 300 m 2 / g〕furnace black, The flaky graphite (B) is 100 to 230 parts by mass and the conductive carbon black (C) is 1 to 30 parts by mass relative to 100 parts by mass of the polyarylene sulfide resin (A); The melt viscosity (R) of the polyarylene sulfide resin composition is in the range of 100 to 400 [Pa·s], in, Melt viscosity (V6) was measured using a flow tester at 300°C and a load of 1.96×10 6 The melt viscosity (R) is the value measured after holding for 6 minutes under the conditions of 〔Pa〕, L / D=10〔mm〕 / 1〔mm〕. The melt viscosity (R) is the value measured by using a capillary rheometer at a temperature of 350℃ and a shear rate of 1216〔s -1 〕The value measured under the conditions of 〕. 2 . The polyarylene sulfide resin composition according to claim 1 , further comprising 1 to 60 parts by mass of carbon fibers (D) based on 100 parts by mass of the polyarylene sulfide resin (A). 3 .

3. The polyarylene sulfide resin composition according to claim 1 or 2, wherein The average particle size (D 50 ) is in the range of 1 to 100 [μm].

4. The polyarylene sulfide resin composition according to claim 1 or 2, wherein The primary particle size of the conductive carbon black (C) is in the range of 20 to 50 [nm], Here, the primary particle size is a value measured using a transmission electron microscope.

5. A polyarylene sulfide resin molded article, which is obtained by melt-molding the resin composition according to claim 1 or 2.

6. A method for producing a polyarylene sulfide resin composition, comprising the steps of: mixing a polyarylene sulfide resin (A), flaky graphite (B) and conductive carbon black (C) as essential components, and melt-kneading the mixture at a temperature above the melting point of the polyarylene sulfide resin; The melt viscosity (V6) of the polyarylene sulfide resin (A) is in the range of 5 to 45 [Pa·s], The conductive carbon black (C) has a specific surface area of ​​50 to 300 m 2 / g〕furnace black, The flaky graphite (B) is 100 to 230 parts by mass and the conductive carbon black (C) is 1 to 30 parts by mass relative to 100 parts by mass of the polyarylene sulfide resin (A); The melt viscosity (R) of the polyarylene sulfide resin composition is in the range of 100 to 400 [Pa·s], in, Melt viscosity (V6) was measured using a flow tester at 300°C and a load of 1.96×10 6 The melt viscosity (R) is the value measured after holding for 6 minutes under the conditions of 〔Pa〕, L / D=10〔mm〕 / 1〔mm〕. The melt viscosity (R) is the value measured by using a capillary rheometer at a temperature of 350℃ and a shear rate of 1216〔s -1 〕The value measured under the conditions of 〕.

7. The method for producing a polyarylene sulfide resin composition according to claim 6, wherein: Furthermore, 1 to 60 parts by mass of carbon fibers (D) are blended with respect to 100 parts by mass of the polyarylene sulfide resin (A).

8. The method for producing a polyarylene sulfide resin composition according to claim 6 or 7, wherein: The average particle size (D 50 ) is in the range of 1 to 100 [μm].

9. The method for producing a polyarylene sulfide resin composition according to claim 6 or 7, wherein: The primary particle size of the conductive carbon black (C) is in the range of 20 to 50 [nm], Here, the primary particle size is a value measured using a transmission electron microscope.

10. A method for producing a polyarylene sulfide resin molded article, comprising the steps of: producing a resin composition by the method according to claim 6 or 7; and melt-molding the resin composition.

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