Polyarylene sulfide resin composition and method for producing same

Abstract

To provide a resin composition having excellent electromagnetic-wave blocking properties while maintaining high strength.SOLUTION: A resin composition contains (A) a polyarylene sulfide resin, obtained by a process of directly heating and polymerizing a diiodo aryl compound, solid sulfur and a polymerization terminator and / or a polymerization reaction catalyst without using a polar solvent (A component). Relative to 100 pts.wt. of the A component, the resin composition also contains (B) metal-coated carbon fibers (B component) 5-100 pts.wt. and (C) modified ultrahigh-molecular-weight polyethylenes (C component) 1-50 pts.wt..SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a resin composition comprising a polyarylene sulfide resin, metal-coated carbon fiber, and modified ultra-high molecular weight polyethylene, which resin composition has excellent electromagnetic wave shielding properties while maintaining excellent mechanical strength. [Background technology]

[0002] Polyarylene sulfide resin is an engineering plastic that has excellent chemical resistance, heat resistance, mechanical properties, etc. For this reason, polyarylene sulfide resin is widely used as a metal replacement material in applications such as electrical and electronic equipment, vehicles, aircraft, and housing facilities, taking advantage of its excellent properties.

[0003] In recent years, as electronic devices become smaller and lighter, the electronic devices are becoming more highly integrated and denser, and this has led to problems with electronic devices malfunctioning due to electromagnetic waves. For this reason, it is required that the housing of an electronic device be given an electromagnetic wave shielding effect for shielding electromagnetic waves from the outside and an electromagnetic wave shielding effect for preventing electromagnetic waves from leaking to the outside. To obtain an electromagnetic wave shielding effect, the housing of an electronic device must be conductive, and generally, the higher the conductivity, the better the electromagnetic wave shielding properties. Conventionally, metals have been used for such housings, but attempts have been made to use plastics such as polyarylene sulfide resins from the viewpoint of workability and weight reduction. However, since plastics generally do not have the same conductivity as metals, it is necessary to give them conductivity in order to counter electromagnetic interference and electromagnetic noise. Representative methods for giving electromagnetic wave shielding properties to plastics include conductive surface treatments such as plating and methods of incorporating metal powder, metal fibers, carbon fibers, metal-coated carbon fibers, etc. As an attempt to further improve the electromagnetic wave shielding properties of plastics, for example, Patent Document 1 proposes an electromagnetic wave shielding resin composition consisting of a thermoplastic resin containing conductive fibers and an olefin wax or olefin polymer having a carboxylic anhydride group and / or a carboxyl group, and Patent Document 2 proposes a thermoplastic resin composition containing nickel metal-coated carbon fibers obtained by adjusting the O1S / C1S measured by the ESCA method on the carbon fiber surface before nickel metal coating treatment of the nickel metal-coated carbon fiber to a specific range. However, this method is not useful for polyarylene sulfide resins, and the electromagnetic wave shielding properties are not sufficient. In addition, Patent Document 3 proposes a resin composition consisting of a polyarylene sulfide resin, a modified polyolefin composition, and a fibrous filler, but there is no description of the electromagnetic wave shielding properties. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 2732986 [Patent Document 2] Patent No. 4674066 [Patent Document 3] JP 2019-218568 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a resin composition that has excellent electromagnetic wave shielding properties while maintaining excellent mechanical strength. [Means for solving the problem]

[0006] As a result of intensive research, the present inventors have discovered a method for polymerizing a diiodoaryl compound, solid sulfur, and a polymerization terminator and / or a polymerization catalyst by directly heating the compound without using a polar solvent. The inventors have found that the resin composition containing the thus obtained polyarylene sulfide resin, metal-coated carbon fiber and modified ultra-high molecular weight polyethylene has excellent electromagnetic wave shielding properties while maintaining excellent mechanical strength, which led to the present invention.

[0007] Specifically, the above-mentioned object is achieved by a resin composition containing 100 parts by weight of (A) polyarylene sulfide resin (component A) obtained by a method in which (A) a diiodoaryl compound, solid sulfur, and a polymerization terminator and / or a polymerization reaction catalyst are polymerized by directly heating without using a polar solvent, and containing 5 to 100 parts by weight of (B) metal-coated carbon fiber (component B) and 1 to 50 parts by weight of (C) modified ultra-high molecular weight polyethylene (component C).

[0008] The present invention will be described in detail below.

[0009] (Component A: polyarylene sulfide resin) The polyarylene sulfide resin used as component A of the present invention is a polyarylene sulfide resin obtained by a method in which a diiodoaryl compound, solid sulfur, and a polymerization terminator and / or a polymerization reaction catalyst are polymerized by directly heating without using a polar solvent.

[0010] The polyarylene sulfide resin may be composed of, for example, a p-phenylene sulfide unit, an m-phenylene sulfide unit, an o-phenylene sulfide unit, a phenylene sulfone unit, a phenylene sulfide ketone unit, a phenylene sulfide ether unit, a diphenylene sulfide unit, a phenylene sulfide unit containing a substituent, a phenylene sulfide unit containing a branched structure, or the like, as its constituent units. Among these, those containing 70 mol % or more, particularly 90 mol % or more of p-phenylene sulfide units are preferred, and poly(p-phenylene sulfide) is more preferred.

[0011] The polyarylene sulfide resin used as component A of the present invention preferably has a polydispersity (Mw / Mn) expressed by the weight average molecular weight (Mw) and the number average molecular weight (Mn) of 2.7 or more, more preferably 2.8 or more, and even more preferably 2.9 or more. If the polydispersity is less than 2.7, there may be a large amount of burrs generated during molding. The upper limit of the polydispersity (Mw / Mn) is not particularly specified, but it is preferably 10 or less. Here, the weight average molecular weight (Mw) and the number average molecular weight (Mn) are values ​​calculated in terms of polystyrene by gel permeation chromatography (GPC). 1-chloronaphthalene was used as the solvent, and the column temperature was set to 210°C.

[0012] Examples of methods for producing polyarylene sulfide resins include those described in U.S. Patent Nos. 4,746,758 and 4,786,713, JP-T 2013-522385, JP-A 2012-233210, and JP-A 5167276.

[0013] The method includes an iodization step and a polymerization step. In the iodization step, an aryl compound is reacted with iodine to obtain a diiodoaryl compound. In the subsequent polymerization step, the diiodoaryl compound is polymerized with solid sulfur using a polymerization terminator to produce a polyarylene sulfide resin. Iodine is generated in gas form in this step, which is recovered and reused in the iodization step. Iodine is essentially a catalyst.

[0014] A representative example of solid sulfur used in the above-mentioned preparation method is cyclooctasulfur (S8) in which eight atoms are bonded at room temperature. However, the sulfur compound used in the polymerization reaction is not limited, and any form that is solid or liquid at room temperature can be used.

[0015] Representative diiodoaryl compounds that can be used in the above-mentioned production method include diiodobenzene. At least one selected from the group consisting of iodoaryl, diiodonaphthalene, diiodobiphenyl, diiodobisphenol and diiodobenzophenone may be used. Also, derivatives of iodoaryl compounds to which an alkyl group or a sulfone group is bonded, or to which oxygen or nitrogen is introduced, may be used. Iodoaryl compounds are classified into different isomers depending on the bonding position of the iodine atom, and preferred examples of these isomers are compounds in which iodine is symmetrically located at both ends of the molecule of the aryl compound, such as p-diiodobenzene, 2,6-diiodonaphthalene and p,p'-diiodobiphenyl. The content of the iodoaryl compound is preferably 500 to 10,000 parts by weight per 100 parts by weight of the solid sulfur. This amount is determined in consideration of the formation of disulfide bonds.

[0016] Representative examples of the polymerization terminator used in the production method include diphenyl sulfide, diphenyl disulfide, etc. The content of the polymerization terminator is preferably 1 to 30 parts by weight based on 100 parts by weight of the solid sulfur. This amount is determined taking into consideration the formation of disulfide bonds.

[0017] In the above-mentioned production method, a polymerization catalyst may be used, and a representative example of the polymerization catalyst is a nitrobenzene-based catalyst. A preferred example of the nitrobenzene-based catalyst is at least one selected from the group consisting of 1,3-diiodo-4-nitrobenzene, 1-iodo-4-nitrobenzene, 2,6-diiodo-4-nitrophenol, iodonitrobenzene, and 2,6-diiodo-4-nitroamine. The content of the polymerization catalyst is preferably 0.01 to 20 parts by weight based on 100 parts by weight of the solid sulfur. This amount is determined in consideration of the formation of disulfide bonds.

[0018] It is believed that by using the polyarylene sulfide resin prepared by this polymerization method and adding modified ultra-high molecular weight polyethylene, the adhesion between the polyarylene sulfide resin and the metal-coated carbon fiber is reduced, thereby suppressing breakage of the metal-coated carbon fiber during melt kneading, and improving the electromagnetic wave shielding properties.

[0019] (Component B: Metal-coated carbon fiber) The metal-coated carbon fiber used in the present invention is a carbon fiber coated with a metal by a known method such as plating or vapor deposition, and from the viewpoints of electrical conductivity, corrosion resistance, productivity, and economy, it is preferable to coat it with nickel. When a carbon fiber not coated with a metal is used, the electromagnetic wave shielding property is poor. Furthermore, it is preferable that the metal-coated carbon fiber of the present invention is provided with a metal coating on the carbon fiber surface by electroplating. A stronger metal coating is formed by electroplating, and a resin composition having good electromagnetic wave shielding property is provided.

[0020] Representative examples of carbon fibers to be metal-coated include carbon fibers made from polymeric fibers such as phenolic resin, rayon, and polyacrylonitrile, and carbon fibers made from pitch-based fibers such as coal-based pitch, petroleum-based pitch, and liquid crystal pitch. Carbon fibers obtained by a method of spinning without an infusible step, such as a method of spinning or molding a raw material composition consisting of a polymer of aromatic sulfonic acids or their salts by methylene bond and a solvent, and then carbonizing the raw material, can also be used. Furthermore, any of general-purpose types, medium elastic modulus types, and high elastic modulus types can be used.

[0021] In the carbonization or graphitization of carbon fibers, the fibers that can be converted into carbon fibers are preferably baked at a temperature of, for example, about 450 to 1,500° C. in the carbonization process, and are preferably baked at a temperature of, for example, about 1,500 to 3,300° C. in the graphitization process. It is not necessarily required that such a heat treatment produces a graphite crystal structure.

[0022] The content of the B component is 5 to 100 parts by weight relative to 100 parts by weight of the A component, and preferably It is 10 to 80 parts by weight, more preferably 20 to 60 parts by weight. If the content of component B is less than 5 parts by weight, sufficient mechanical strength is not obtained and the electromagnetic wave shielding property is also poor. On the other hand, if it exceeds 100 parts by weight, the productivity or molding processability decreases.

[0023] (Component C: Modified ultra-high molecular weight polyethylene) The modified ultra-high molecular weight polyethylene used in the present invention is a polymer obtained by modifying ultra-high molecular weight polyethylene. The modified ultra-high molecular weight polyethylene can be obtained, for example, by melt-kneading ultra-high molecular weight polyethylene and a compound containing a modifying group, and graft-modifying the ultra-high molecular weight polyethylene to introduce the modifying group. The polyethylene to be modified may be a mixture of polyethylene and ultra-high molecular weight polyethylene. Examples of the modifying component used for modification include maleic anhydride and itaconic anhydride, and maleic anhydride is particularly preferred. The content of the modifying group in the C component is preferably 0.05 to 3% by weight. If it is less than 0.05% by weight, the electromagnetic wave shielding property may be poor, and if it exceeds 3% by weight, the mechanical properties may be poor. Such modified polyethylene is easily available as LUBMER LY1040 from Mitsui Chemicals, Inc. Note that if unmodified ultra-high molecular weight polyethylene is used, the electromagnetic wave shielding property is poor. The weight-average molecular weight of the modified ultra-high molecular weight polyethylene is preferably less than 6,000,000, more preferably less than 3,000,000, and even more preferably less than 1,000,000. The lower limit of the weight-average molecular weight is preferably 100,000 or more, and more preferably 150,000 or more. If the weight-average molecular weight is 6,000,000 or more, the productivity or processability may be poor, and if it is less than 100,000, the electromagnetic wave shielding property may be poor.

[0024] The content of component C is 1 to 50 parts by weight, preferably 2 to 40 parts by weight, and more preferably 3 to 30 parts by weight, relative to 100 parts by weight of component A. If the content is less than 1 part by weight, the electromagnetic wave shielding properties are insufficient, and if it exceeds 50 parts by weight, the mechanical properties are significantly reduced.

[0025] (Other Ingredients) The resin composition of the present invention can be used in combination with inorganic fillers other than metal-coated carbon fibers, as long as the effects of the present invention are not impaired. Examples of inorganic fillers include fibrous fillers other than metal-coated carbon fibers, powdery fillers, and plate-like fillers. Examples of fibrous fillers include glass fibers, aramid fibers, potassium titanate whiskers, zinc oxide whiskers, alumina fibers, silicon carbide fibers, ceramic fibers, asbestos fibers, gypsum fibers, metal fibers, and inorganic fibers coated with conductive materials other than metals. Specific examples of conductive materials in inorganic fibers coated with conductive materials other than metals include SnO2 (antimony doped) and In2O3 (antimony doped). Examples of inorganic fibers to be coated include glass fibers, potassium titanate whiskers, zinc oxide whiskers, titanic acid whiskers, and silicon carbide whiskers. Examples of coating methods include vacuum deposition, sputtering, electroless plating, and baking. These may be surface-treated with a surface treatment agent such as a titanate-based, aluminum-based, or silane-based coupling agent. In order to obtain better mechanical strength, it is preferable to pretreat these fibrous fillers with a coupling agent such as an isocyanate-based compound, an organic silane-based compound, an organic titanate-based compound, an organic borane-based compound, or an epoxy compound. Examples of powdered fillers include carbon black, calcium carbonate, silica, titanium oxide, graphite, carbon nanotubes, and metal powder, and examples of plate-like fillers include talc and mica.

[0026] The resin composition of the present invention may contain an elastomer component within a range that does not impair the effects of the present invention. Suitable elastomer components include core-shell graft copolymer resins such as acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-butadiene-styrene copolymer (MBS resin) and silicone-acrylic composite rubber graft copolymer, or silicone thermoplastic elastomers, olefin Thermoplastic elastomers such as thermoplastic elastomers based on styrene, thermoplastic elastomers based on polyamide, thermoplastic elastomers based on polyester, and thermoplastic elastomers based on polyurethane are examples of thermoplastic elastomers.

[0027] The resin composition of the present invention may contain other thermoplastic resins within the range that does not impair the effects of the present invention. Examples of other thermoplastic resins include general-purpose plastics such as polyethylene resins, polypropylene resins, and polyalkyl methacrylate resins, engineering plastics such as polyphenylene ether resins, polyacetal resins, aromatic polyester resins, liquid crystal polyester resins, polyamide resins, cyclic polyolefin resins, and polyarylate resins (amorphous polyarylate, liquid crystal polyarylate), and so-called super engineering plastics such as polytetrafluoroethylene, polyether ether ketone, polyetherimide, polysulfone, and polyether sulfone.

[0028] The resin composition of the present invention may contain, within the scope of the effect of the present invention, antioxidants and heat resistance stabilizers (hindered phenols, hydroquinones, phosphites, and their substituted derivatives, etc.), weather resistance agents (resorcinols, salicylates, benzotriazoles, benzophenones, hindered amines, etc.), release agents and lubricants (montanic acid and its metal salts, its esters, its half esters, stearyl alcohol, stearamide, various bisamides, bisureas, polyethylene wax, etc.), pigments (cadmium sulfide, phthalocyanine, carbon black, etc.), dyes (nigrosine, etc.), crystal nucleating agents (talc, silica, kaolin, clay, etc.), plasticizers (p-octyl ether, ethyl ether, butyl ... and the like), antistatic agents (alkyl sulfate-type anionic antistatic agents, quaternary ammonium salt-type cationic antistatic agents, nonionic antistatic agents such as polyoxyethylene sorbitan monostearate, betaine-type amphoteric antistatic agents, etc.), flame retardants (red phosphorus, phosphate esters, melamine cyanurate, hydroxides such as magnesium hydroxide and aluminum hydroxide, ammonium polyphosphate, brominated polystyrene, brominated polyphenylene ether, brominated polycarbonate, brominated epoxy resin, or combinations of these brominated flame retardants with antimony trioxide, etc.) and other polymers can be added.

[0029] (Production of resin composition) The resin composition of the present invention can be produced by mixing the above-mentioned components simultaneously or in any order using a mixer such as a tumbler, a V-type blender, a Nauter mixer, a Banbury mixer, a kneading roll, an extruder, etc. Melt kneading using a twin-screw extruder is preferred, and if necessary, it is preferred to feed any component into the other melt-mixed components from a second feed port using a side feeder or the like.

[0030] The resin extruded as described above is directly cut and pelletized, or strands are formed and then the strands are cut by a pelletizer and pelletized. When it is necessary to reduce the influence of external dust during pelletization, it is preferable to purify the atmosphere around the extruder. The shape of the obtained pellets may be a general shape such as a cylinder, a prism, or a sphere, but is more preferably a cylinder. The diameter of such a cylinder is preferably 1 to 5 mm, more preferably 1.5 to 4 mm, and even more preferably 2 to 3.5 mm. On the other hand, the length of the cylinder is preferably 1 to 30 mm, more preferably 2 to 5 mm, and even more preferably 2.5 to 4 mm.

[0031] (About molded products) Molded articles made of the resin composition of the present invention can be obtained by molding the pellets produced as described above. Preferably, they are obtained by injection molding or extrusion molding. Injection molding includes not only ordinary molding methods, but also injection compression molding, injection press molding, gas-assisted injection molding, foam molding (including a method of injecting a supercritical fluid), insert molding, in-mold coating molding, heat-insulating mold molding, rapid heating and cooling mold molding, two-color molding, multi-color molding, sandwich molding, and ultra-high speed injection molding. Molding can be performed using either a cold runner method or a hot runner method. In addition, extrusion molding can produce various extrusion molded products, sheets, films, and the like. Sheets and films can also be molded using an inflation method, a calendar method, a casting method, and the like. Furthermore, it is possible to mold the resin composition of the present invention into a heat-shrinkable tube by applying a specific stretching operation. It is also possible to mold the resin composition of the present invention into a molded article by rotational molding, blow molding, and the like.

[0032] Furthermore, the molded products manufactured by the above-mentioned various methods can be subjected to various surface treatments. The surface treatment here means forming a new layer on the surface of the resin molded product, such as vapor deposition (physical vapor deposition, chemical vapor deposition, etc.), plating (electroplating, electroless plating, hot-dip plating, etc.), painting, coating, printing, etc., and various methods used for resin molded products can be applied. Furthermore, various types of transport containers, electromagnetic wave shielding covers, etc. can be manufactured by subjecting sheet molded products (including ribbon-shaped molded products) to various vacuum forming, hot press forming, bending, etc. Effect of the Invention

[0033] The resin composition of the present invention has excellent electromagnetic wave shielding properties while maintaining excellent mechanical strength, and therefore, a molded article obtained from the resin composition of the present invention can be suitably used as a cover for electronic devices, antennas, and the like. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] The present inventors currently consider the best embodiment of the present invention to be one that embodies the preferred ranges of each of the above-mentioned requirements, and representative examples thereof are described in the following examples, although the present invention is not limited to these embodiments. EXAMPLES

[0035] [Evaluation of resin composition] (1) Tensile breaking strength The measurement was performed in accordance with ISO527 (measurement condition: 23° C.). The test pieces were molded by the following method. The larger this value, the better the mechanical strength of the resin composition.

[0036] (2) Electromagnetic wave shielding property Using a test piece measuring 150 x 150 x 2 mmt, the electromagnetic shielding properties were measured for electric field waves (frequency 500 MHz) using a network analyzer (manufactured by Keysight Technologies) and a KEC method measuring device (manufactured by JSE). The higher the value, the better the electromagnetic shielding properties.

[0037] [Examples 1 to 6, Comparative Examples 1 to 8] A polyarylene sulfide resin, a metal-coated carbon fiber, and a modified ultra-high molecular weight polyethylene were melt-kneaded using a vented twin-screw extruder in the respective compounding amounts shown in Table 1 to obtain pellets. The vented twin-screw extruder used was TEX30α-38 (fully meshing, co-rotating) manufactured by Japan Steel Works, Ltd. The extrusion conditions were a discharge rate of 20 kg / h, a screw rotation speed of 200 rpm, a vacuum degree of the vent of 3 kPa, and the extrusion temperature was 320 °C from the first feed port to the die part. The metal-coated carbon fiber was supplied from the second feed port using the side feeder of the above extruder, and the polyarylene sulfide resin and the modified ultra-high molecular weight polyethylene were supplied to the extruder from the first feed port. Here, the first feed port is the feed port farthest from the die, and the second feed port is the feed port located between the die and the first feed port of the extruder. The obtained pellets were dried in a hot air circulation dryer at 130 °C for 6 hours, and then test pieces for evaluation were molded using an injection molding machine (EC160NII-4Y manufactured by Toshiba Machine Co., Ltd.) at a cylinder temperature of 320 °C and a mold temperature of 140 °C.

[0038] Each component denoted by the symbol notation in Table 1 is as follows. <Component A> A-1: A polyphenylene sulfide resin obtained by the following production method [Production Method] To 300.00 g of para-diiodobenzene and 27.00 g of sulfur, 0.60 g of diphenyl disulfide (content of 0.65% by weight based on the weight of the finally polymerized PPS) was added as a polymerization terminator, and the mixture was heated to 180 °C to completely melt and mix them. Then, the temperature was raised to 220 °C and the pressure was reduced to 200 Torr. The obtained mixture was subjected to a polymerization reaction for 8 hours while gradually changing the temperature and pressure so that the final temperature and pressure were 320 °C and 1 Torr, respectively, to obtain a polyphenylene sulfide resin (A-1) having a phenyl group as a terminal group.

[0039] A-2: A polyphenylene sulfide resin obtained by the following production method [Production Method] Into a 15-liter autoclave equipped with a stirrer, 1814 g of flaky sodium sulfide (Na2S·2.9H2O), 8.7 g of granular caustic soda (100% NaOH: Wako Pure Chemical Industries, special grade), and 3232 g of N-methyl-2-pyrrolidone were charged. While stirring under a nitrogen stream, the temperature was gradually raised to 200 °C, and 339 g of water was distilled off. After cooling to 190 °C, 2129 g of p-dichlorobenzene and 1783 g of N-methyl-2-pyrrolidone were added, and the system was sealed under a nitrogen stream. This system was heated to 225 °C over 2 hours and polymerized at 225 °C for 1 hour. Then, the temperature was raised to 250 °C over 25 minutes and polymerization was carried out at 250 °C for 2 hours. Next, 509 g of distilled water was pressured into this system at 250 °C, the temperature was raised to 255 °C, and the polymerization reaction was further carried out for 2 hours. After the polymerization was completed, it was cooled to room temperature, and the polymerization slurry was separated into solid and liquid by a centrifugal filter. The cake was successively washed 3 times with N-methyl-2-pyrrolidone and acetone under a nitrogen stream, and further successively washed with 0.2% hydrochloric acid and warm water under a nitrogen stream. The obtained poly(p-phenylene sulfide) was dried at 105 °C for one day and night to obtain a polyarylene sulfide resin (A-2).

[0040] <Component B> B-1: HT C923 (manufactured by Teijin Limited, fiber diameter: 7.5 μm, cut length: 6 mm, nickel metal-coated carbon fiber) B-2: Copper metal-coated carbon fiber (fiber diameter: 7.5 μm, cut length: 6 mm, copper metal-coated carbon fiber) copper-plated according to the conditions disclosed in JP-A-59-226195 B-3: HT P722 (manufactured by Teijin Limited, fiber system: 7.0 μm, cut length: 3 mm, PAN-based carbon fiber)

[0041] <Component C> C-1: LY1040 (lubmer (trade name) manufactured by Mitsui Chemicals, Inc., maleic anhydride-modified ultra-high molecular weight polyethylene, weight average molecular weight 160,000) C-2: Hynex 2200J (manufactured by Prime Polymer Co., Ltd., polyethylene, weight average molecular weight less than 100,000) C-3: Hi-Zex Million 630M (Mitsui Chemicals, Inc. ultra-high molecular weight polyethylene, weight average molecular weight 100,000 or more)

[0042] [Table 1]

Claims

1. The resin composition contains 100 parts by weight of a polyarylene sulfide resin (component A) obtained by a method in which (A) a diiodoaryl compound, solid sulfur, and a polymerization terminator and / or a polymerization catalyst are polymerized by directly heating without using a polar solvent, (B) 5 to 100 parts by weight of a metal-coated carbon fiber (component B), and (C) 1 to 50 parts by weight of a modified ultra-high molecular weight polyethylene (component C) modified with maleic anhydride.

2. 2. The resin composition according to claim 1, wherein the terminal group of component A is a phenyl group.

Images