Abstract: A polyarylene sulfide resin composition excellent in compatibility between a polyarylene sulfide resin and a polyorganosiloxane graft copolymer is obtained by melt-mixing a composition consisting essentially of 60 to 99 parts by weight of a polyarylene sulfide resin, to 40 parts by weight of a polyorganosiloxane graft copolymer which was obtained by graft-polymerizing one or more kinds of a vinyl monomer onto particles of a compound rubber consisting of a polyorganosiloxane rubber component and a polyalkyl (meth)acrylate rubber component inseparably united with each other, and 0.01 to 10 parts by weight of and organic silane compound having an epoxy group per 100 parts of the mixture.

Abstract: A process is provided for preparing poly(arylene sulfide)/poly(arylene sulfide sulfone) block copolymer comprising: contacting poly(arylene sulfide) prepolymer, a dihaloaromatic sulfone, a sulfur source, and a polar organic compound under polymerization conditions, wherein said prepolymer is prepared by contacting a dihaloaromatic compound, a phenolic compound, a polar organic compound, and a sulfur source under polymerization conditions.

Abstract: This invention relates to thermoplastic moulding compounds based on polyamides and/or polyesters and special functionally modified polyarylene sulphides and optionally conventional additives and to their preparation and their use.

Abstract: A heat-resistant stretched film is obtained by stretching a resin composition comprising 100 parts by weight of a poly(arylene sulfide) of a substantially linear structure and 5 to less than 100 parts by weight of a melt-stable poly(arylene thioether-ketone). The poly(arylene sulfide) has a melt viscosity of at least 1,000 poises as measured at 310.degree. C. and a shear rate of 200 sec.sup.-1. The poly(arylene thioether-ketone) has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- groups are bonded in the para position to each other through the benzene ring, and has the following physical properties (a)-(c):(a) a melting point, Tm being 310.degree.-380.degree. C.;(b) a melt crystallization temperature, Tmc (420.degree. C./10 min) being at least 210.degree. C. and a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) being at least 10 J/g; and(c) a reduced viscosity being 0.3-2 dl/g at 25.degree. C. and a polymer concentration of 0.

Abstract: Low temperature heat curable arylene sulfide copolymer compositions which are particularly suitable for use in coating applications are provided. The compositions basically comprise a first arylene sulfide copolymer having unsubstituted para- and ortho-aromatic sulfide repeating units in the polymer chain, and a second arylene sulfide copolymer having unsubstituted para-aromatic sulfide repeating units and alkyl-substituted aromatic sulfide repeating units in the polymer chain.

Abstract: A polymer composition for forming in-situ composite molded articles is provided. The polymer composition comprises a polyphenylene sulfide matrix resin, a thermotropic liquid crystal polymer, and a non-crystalline polymer. The polymer composition may be melt injected or melt extruded to form in-situ composite molded articles having improved mechanical properties.

Abstract: Disclosed is a composition comprising an admixture of(A) from 99 to 1 weight percent, based on the weight of the admixture, of a copoly(arylene sulfide) and(B) from 1 to 99 weight percent, based on the weight of the admixture, of a poly(aryl sulfone).

Abstract: This invention relates to compositions of polyarylene sulphides (PAS), melamine resins and rubbers. The compositions are distinguished by very great toughness.

Abstract: A polyarylene sulfide resin composition comprising 60-99 parts by weight of a polyarylenesulfide resin (A), 40-1 parts by weight of a polyorganosiloxane graft copolymer (B) prepared by grafting a vinyl monomer on a polyorganosiloxane rubber having a degree of swelling in a range of 3-50 measured using toluene as a solvent and an average particle size in a range of 0.15 .mu.m-0.5 .mu.m and being copolymerized with a graft-linking agent, where the total amount of the (A) component and the (B) component is 100 parts by weight, and 0-150 parts by weight of a reinforcing filler (C). A polyarylene sulfide resin composition according to the present invention is excellent in impact resistance, heat resistance, mechanical strength and moldability and useful for an engineering plastic.

Abstract: A random copolymer composed of at least one arylene sulfide segment and at least one arylene aulfide sulfone segment is prepared by contacting at least one dihaloaromatic sulfide having a formula of X--Ar(R).sub.n --S--Ar.sup.1 (R.sup.1).sub.n --X.sup.1, with a mixture comprising at least one sulfur source and at least one dihaloaromatic sulfone having a formula of X.sup.2 --Ar.sup.2 (R.sup.2).sub.n --S(O.sub.2)--Ar.sup.3 (R.sup.3).sub.n --X.sup.3 in the presence of a polar organic compound under polymerization conditions to synthesize a random copolymer; where X, X.sup.1, X.sup.2, and X.sup.3 can be the same or different halogens and are each selected from the group consisting of fluorine, chlorine, bromine and iodine; Ar, Ar.sup.1, Ar.sup.2, and Ar.sup.3 are each an arylene group; R, R.sup.1, R.sup.2, and R.sup.

Abstract: The present invention discloses a process for producing a granular polyarylene sulfide which has a high melt viscosity and a high degree of cross-linkage, becomes gel under melting and is easy to handle in the production and the fabrication thereof.The process disclosed herein comprises (1) a step (A) an initial-stage polymerization step for obtaining a polyarylene sulfide by reacting an alkali metal sulfide, a dihaloaromatic compound and a polyhaloaromatic compound, having three or more halogen substituents in a molecule, in the presence of water in an amount of 0.5 to 2.9 moles per mol of said alkali metal sulfide at a temperature in the range of 180.degree. to 235.degree. C. until the total conversion ratio of said dihalo- and polyhaloaromatic compounds reaches 50 to 98% and the melt viscosity of a polyarylene sulfide obtained at the end of the step becomes 5 to 5,000 poise, measured at 310.degree. C.

Abstract: A high strength, thermally resistant, fire retardant, composition of matter is provided comprising (A) about 99.5 to about 75 weight percent of unmodified polymethylpentene where the weight percent of polymethylpentene is based on the total weight of A and B; and (B) about 0.5 to about 25 weight percent of polyphenylene sulfide where the weight percent of polyphenylene sulfide is based on the total weight of A, and B; (C) about 10 to about 67 weight percent of a reinforcer where the weight percent of the reinforcer is based on the total weight of A, B, C, and D; (D) optionally about 5 to about 45 weight percent of a flame retardant where the weight percent of the flame retardant is based on the total weight A, B, C and D.

Abstract: A hydroxy-substituted poly(phenylene ether) resin can be produced by copolymerizing from 1.5 to 8 mol % of a phenol compound selected from those represented by the following formulae (a), (b), (c), (d), and (e): ##STR1## and from 98.5 to 92 mol % of a phenol compound of the following formula (f): ##STR2## The hydroxy-substituted poly(phenylene ether) resin shows excellent compatibility with a polyamide, a polycarbonate, a poly(butylene terephthalate), a poly(phenylene sulfide), and is useful as a copatibilizer or a modified resin for engineering plastics.

Abstract: A polyarylene sulfide resin composition useful for molding articles is obtained by mixing and melt kneading a polyarylene sulfide resin, a polyamide resin, a silane compound and either water or an alcohol having a boiling point of at least 100.degree. C.

Abstract: Disclosed herein are a process for the preparation of a carboxylated arylene thioether oligomer, in which an alkali metal sulfide is caused to act on a poly(arylene thioether) so as to depolymerize the poly(arylene thioether), thereby preparing an alkali thiolate-containing oligomer, and a carboxylating agent is then caused to act on the alkali thiolate-containing oligomer, thereby forming the carboxylated arylene thioether oligomer, and a process for the production of an arylene thioether copolymer, wherein the carboxylated arylene thioether oligomer alone, which has been obtained in accordance with this preparation process, or a mixture of the carboxylated oligomer in an amount of at least 50 wt. % and another carboxylic compound in an amount less than 50 wt. % is reacted with an alkylenediol or an alkylenediol and a polyester or an alkylene diol and a lactone.

Abstract: Disclosed herein is a resin composition of high heat resistance, comprising 100 parts by weight of at least one arylene thioether ketone polymer and 0.05-30 parts by weight of strontium carbonate.

Abstract: Disclosed herein is a poly(arylene thioether) resin composition comprising 100 parts by weight of a poly(arylene thioether) (A) having a shear rate dependence value of melt viscosity at 310.degree. C. of 2.2-3.0 and a crystallization temperature of 175.degree.-210.degree. C., and 20-400 parts by weight of a poly(arylene thioether) (B) having a shear rate dependence value of melt viscosity at 310.degree. C. of 1.0-2.0 and a crystallization temperature of 220.degree.-260.degree. C. The resin portion consisting of the poly(arylene thioethers) (A) and (B) in the resin composition has a melt viscosity of 1,400-3,500 poises as measured at 310.degree. C. and a shear rate of 1,200 sec.sup.-1, a shear rate dependence value of melt viscosity at 310.degree. C. of 1.5-2.3, and a crystallization temperature of 205.degree.-230.degree. C. Extruded products such as a tubular extruded article obtained from the resin composition are also disclosed.

Abstract: A process for preparing a poly(arylene sulfide) and copolymer thereof from a poly(arylene sulfide disulfide) is provided which comprises contacting the poly(arylene sulfide disulfide) with a polyhalo-substituted cyclic compound having unsaturation between adjacent ring carbon atoms and having halogen atoms attached to the ring carbon atoms in a polar organic compound and a basic compound at an elevated temperature. Alternatively, the poly(arylene sulfide disulfide) can be substantially dissolved in the polar organic solvent at elevated temperature to form fragments which can be contacted with the polyhalo-substituted cyclic compound in a polar organic compound and a basic compound at an elevated temperature. The fragments also can be isolated, recovered and then contacted with the polyhalo-substituted cyclic compound in a polar organic compound and a basic compound at an elevated temperature.

Abstract: A composition comprising (A) 97 to 20 parts by weight of a polyarylene sulfide resin and (B) 3 to 80 parts by weight of a polyamide resin with (C) 0.1 to 15 parts by weight of a compound having a carbon-carbon double bond and an epoxy group in its molecule and, if necessary, (D) a radical initiator and/or (E) a filler.

Abstract: A polyarylene sulfide composition comprises (A) 99 to 20 parts by weight of polyarylene sulfide, (B) 1 to 80 parts by weight of a polyamide and (C) 0.01 to 5 parts by weight, based on 100 parts by weight of (A) and (B) in total, of an alkoxysilane. It may further comprise (D) up to 400 parts by weight of a filler in the form of fiber, particles or plates. It can be produced by blending (A), (B), (C) and (D) with one another and melt-kneading the blend for at least 30 seconds while heated.

Abstract: Disclosed herein is a poly(arylene thioether-ketone-ketone) copolymer comprising (A) at least one poly(arylene thioether-ketone-ketone) segment having predominant recurring units of the formula ##STR1## and (B) at least one poly(arylene thioether) segment having predominant recurring units of the formula ##STR2## (a) the ratio of the total amount of the poly(arylene thioether) segment (B) to the total amount of the poly(arylene thioether-ketone-ketone) segment (A) ranging from 0.1 to 9 by weight, (b) the weight-average molecular weight of the poly(arylene thioether) segment (B) being at least 200 but lower than 1000, and (c) said copolymer having a melt viscosity of 2-100,000 poises as measured at 380.degree. C. and a shear rate of 1,200/sec as well as a production process of the poly(arylene thioether-ketone-ketone) copolymer.

Abstract: The present invention provides:(1) a polyarylenesulfide resin composition comprising 60 to 99 wt. % of polyarylenesulfide and 40 to 1 wt. % of acrylonitrile-butadiene rubber which has been hydrogenated to the extent that the unsaturation degree is not more than 7 mol % (First Composition);( (2) a polyarylenesulfide resin composition comprising 100 parts by weight of the First Composition and 0.05 to 5 parts by weight of an epoxy resin (Second Composition);(3) a polyarylenesulfide resin composition comprising 100 parts by weight of the First Composition and 5 to 200 parts by weight of a fibrous reinforcing material and/or an inorganic filler (Third Composition); and(4) a polyarylenesulfide resin composition comprising 100 parts by weight of the Second Composition and 5 to 200 parts by weight of a fibrous reinforcing material and/or an inorganic filler (Fourth Composition).

Abstract: Disclosed herein are a poly(arylene thioether) block copolymer alternately comprising (A) at least one poly(arylene thioetherketoneketone) block having predominant recurring units of the formula ##STR1## and (B) at least one poly(arylene thioether) block having predominant recurring units of the formula ##STR2## (a) the ratio of the total amount of the poly(arylene thioether) block (B) to the total amount of the poly(arylene thioetherketone) block (A) being within a range of 0.1-9 by weight, (B) the weight average molecular weight of the poly(arylene thioether) block (B) being at least 1,000, and (c) said block copolymer having a melt viscosity of 2-100,000 poises as measured at 380.degree. C. and a shear rate of 1,200/sec as well as a production process of the block copolymer.

Abstract: This invention relates to polyarylene sulphides (PAS), preferably polyphenylene sulphides (PPS), which are modified with carboxyl groups or dicarboxylic acid anhydride groups.

Abstract: This invention relates to a process for the purification of optionally branched polyarylene sulphides (PPS). Polyarylene sulphides which have been purified according to the invention are distinguished by the reduced amount of ash-forming impurities contained in them.

Abstract: An aromatic polysulfone resin composition improved in dispersibility of fluorocarbon polymer comprising 0.3 to 50 parts by weight of a low molecular weight fluorocarbon polymer fluorinated up to its molecular end, having a flow temperature of 350.degree. C. or lower as measured by the following method, and 100 parts by weight of an aromatic polysulfone resin:Flow temperature: A temperature at which melt viscosity reaches 48,000 poises when a molten sample is extruded from a nozzle (1 mm in inner diameter and 10 mm in length) of a capillary rheometer under a load of 100 kg/cm.sup.2 at a temperature elevation speed of 4.degree. C./minute.

Abstract: A thermoplastic resin composition comprising (a) from 10 to 90% by weight of polyphenylene sulfide and (b) from 10 to 90% by weight of hydroxyalkylated polyphenylene ether which exhibits improved compatibility between components (a) and (b) and provides molded articles having characteristics inherent to polyphenylene sulfide and polyphenylene ether, i.e., excellent mechanical strength, excellent rigidity, and good appearance.

Abstract: A polyarylene sulfide resin composition having improved adhesion comprises (A) 100 parts by weight of a polyarylene sulfide resin, (B) 0.1 to 15 parts by weight of a compound having a carbon-carbon double bond and an epoxy group in its molecule and, if necessary, (C) a radical initiator and (D) a filler.

Abstract: The invention relates to mixtures of polyarylene sulfides, crosslinking agents containing nitro groups, and optionally, mineral fillers and to the moldings obtainable from these mixtures.

Abstract: In the adhesion of metallic materials to polymers, new adhesive agents of nitrogen containing hetrocyclic polymers such as compositions of imidazole-pyrridine, pyrrolidone-pyridine, and imidazole-pyrrolidone solutions have been discovered as useful. These agents also exhibit anti-corrosion effects. Adhesion and/or reduction of anti-corrosion can be accomplished by pre-coating the metal material with at least one of these agents prior to applying the polymer, or by preblending the polymer with at least one of these agents followed by applying the blend to the metal, under suitable conditions.

Abstract: Brittleness of polyphenylene sulfide resins is significantly reduced and contrariwise toughness thereof is remarkably enhanced by a two-stage process which comprises the steps of subjecting a polyphenylene sulfide resin as synthesized to a thermal treatment under an inert atmosphere at a temperature above 200.degree. C. so as to give a substantially linearly grown polyphenylene sulfide resin having an increased melt viscosity of not less than 800 poises, and then curing the substantially linear resin by heating it under an oxidative atmosphere at a temperature above 200.degree. C. so as to produce a polyphenylene sulfide resin having a still more increased melt viscosity of not less than 5,000 poises.

Abstract: Poly(arylene sulfide) with reduced metal contamination is produced in a two step process by contacting a dihaloaromatic compound, a sulphur source, an organic amide, alkali metal carboxylate and water in a reaction vessel wherein at least the liquid contacting parts of the vessel are constructed of titanium.

Abstract: A novel graft copolymer capable of imparting to a polyolefin when blended therewith high tensile modulus and high sag resistance without increasing melt viscosity, and a method of making the same. The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto. The graft copolymer is formed by dissolving or swelling a non-polar polyolefin in an inert hydrocarbon solvent, heating to dissolve the polyolefin, and while stirring the mixture, adding a methacrylate monomer, together with an initiator to produce a constant, low concentration of radicals, to form a graft copolymer with a high molecular weight polymer chain covalently bonded or grafted to the polyolefin backbone. The graft copolymer can be separated from the solvent, isolated by volatilizing the solvent, for example in a devolatilizing extruder, and extruded into a desired shape such as a sheet, tube or the like. This graft copolymer can be blended with a poolyolefin matrix.

Abstract: A poly(arylene sulfide) resin composition comprised of 100 parts by weight of a resin mixture of (A) 50 to 98% by weight of a heat-treated poly(arylene sulfide) such as heat-treated polyphenylene sulfide and (B) 50 to 2% by weight of a styrene/butadiene/styrene block copolymer elastomer or a modified product thereof, and 0.2 to 10 parts by weight of an aromatic maleimide compound represented by the formula (1): ##STR1## wherein R.sub.1 is a phenylene-containing radical, or the formula (2): ##STR2## wherein R.sub.2 is alkylene and n is 0, 1 or 2. The resin composition has a good impact resistance, elongation and flexibility.

Abstract: A polyarylene sulfide resin composition which yields a molded article having excellent surface appearance and excellent toughness and impact resistance comprises a blend of a polyarylene sulfide resin and a polyolefin resin with a compound having a carbon-carbon double bond and an epoxy group in its molecule. Optionally a radical initiator and a filler can be added to the composition.

Abstract: This invention relates to mixtures of short fibers of varying lengths, diameters and aspect ratios composed of an anisotropic polymer, to compositions containing said fibers and one or more thermoplastic or thermoset resins, and to a process for forming said mixtures.

Abstract: Disclosed herein are electronic device sealing resin compositions containing 100 parts by weight of a thermoplastic resin mixture composed of 25-60 wt. % of a poly(arylene sulfide) and 40-75 wt. % of an inorganic filler; and 1.5-5 parts by weight of an epoxy-modified silicone oil having an epoxy equivalent of 350-1,000 g/eqiv. Also disclosed are electronic devices sealed using such resin compositions.

Abstract: Disclosed herein is a heat-resistant film obtained by biaxially-stretching a composition which comprises (A) 50-90 parts by weight of a polyetheretherketone having predominant recurring units of the formula: ##STR1## and (B) 50-10 parts by weight of a substantially linear poly(arylene sulfide) having melt viscosity of at least 1,000 poises. A production process of such a heat-resistant film is also disclosed, which comprises biaxially stretching the above composition in a temperature range at least equal to the crystallization temperature (Tc) of the poly(arylene sulfide) but not higher than the crystallization temperature (Tc) of the polyetheretherketone.

Abstract: A poly(phenylene sulfide) material containing predominantly para-phenylene sulfide structural units and having a melt viscosity of at least 5 poises (at 300.degree. C.) may be treated or reacted with an alkali metal sulfide and/or hydrosulfide in a polar aprotic solvent at a relatively low temperature in the range of 150.degree.-230.degree. C. so as to introduce an increased amount of reactive thiolate or thiol end groups to the polymer molecule and hence to enhance the reactivity of the polymer material. The thus modified and highly reactive poly(phenylene sulfide) material exhibits an improved compatibility with other polymers and is expected to be useful in preparation of polymer alloys of improved or modified physical and chemical properties.

Abstract: The present invention is directed to a polyarylene sulfide resin composition which further contains a polyester resin and has well-balanced properties with respect to toughness, impact resistance and melt viscosity by improving the compatibility of the polyarylene sulfide resin with the polyester resin. The composition comprises a polyarylene sulfide resin, a polyester resin, and 0.1 to 15 parts by weight per 100 parts by weight resin of a compound having in its molecule a carbon-carbon double bond and an epoxy group and, further, including optional ingredients such as a radical initiator and/or filler.

Abstract: A polysulphide resin composition is cured by reacting a liquid polysulphide resin with an isocyanate curing agent in the presence of an organometallic or metal salt catalyst, preferably an organotin catalyst such as dibutyltin laurate (DBTL). The compositions have utility in thin films and coatings, and in the bonding, sealing and coating of polycarbonates. Aliphatic isocyanates are preferred for applications where clear coatings are required, the more reactive aromatic isocyanates being preferred for other applications.

Abstract: The present invention provides: (a) a method for producing a poly(arylene sulfide)(PAS) resin composition: (b) a PAS resin composition produced by the inventive resin composition production method; (c) a method which utilizes the inventive PAS resin composition in the production of a continuous fiber-reinforced composite; and (d) a PAS composite produced by the inventive composite production method. The PAS resin composition produced by the inventive resin composition production method comprises a crystallizable arylene sulfide polymer and a nucleating agent. The nucleating agent is admixed with the crystallizable arylene sulfide polymer by adding said nucleating agent to the polymerization reaction system. The inventive PAS resin composition solidifies to a fine-grained crystalline morphology and is well suited for use in the production of continuous fiber-reinforced composites, molded articles, and other products.

Abstract: A batch type process for purification of a polymer resin, in which a predetermined volume of acid is rapidly emptied and stirred into a fixed volume of polymer slurry for chemically treating impurities in the slurry, is converted to a continuous operation by supplying a substantially constant stream of polymer slurry and a controlled stream of acid to a mixing vessel. pH control of the polymer slurry required for effective purification of the polymer resin is achieved by manipulating the flow rate of the acid stream responsive to a feedforward control signal which operates in conjunction with a feedback signal. The feedforward signal is based on an upstream measurement of slurry flow rate to the mixing vessel and the feedback signal is based on a downstream pH measurement of slurry flowing from the mixing vessel.

Abstract: The present invention discloses a process for producing a granular polyarylene sulfide which has a high melt viscosity and a high degree of cross-linkage, becomes gel under melting and is easy to handle in the production and the fabrication thereof.The process disclosed herein comprises (1) a step (A) an initial-stage polymerization step for obtaining a polyarylene sulfide by reacting an alkali metal sulfide, a dihaloaromatic compound and a polyhaloaromatic compound, having three or more halogen substituents in a molecule, in the presence of water in an amount of 0.5 to 2.9 moles per mol of said alkali metal sulfide at a temperature in the range of 180.degree. to 235.degree. C. until the total conversion ratio of said dihalo- and polyhaloaromatic compounds reaches 50 to 98% and the melt viscosity of a polyarylene sulfide obtained at the end of the step becomes 5 to 5,000 poise, measured at 310.degree. C.

Abstract: The present invention discloses an easily-slidable polyarylene thioether film comprising a film containing, as the basic resin, a polyarylene thioether mainly composed of repeating unit of ##STR1## and not containing substantial amount of powder lubricant, having at least one side surface of the arithmetic average surface roughness within the range of 2 to 200 nm and a high strength, and a process to produce the same.

Abstract: Polyethylene terephthalate molding compositions are provided which comprise polyethylene terephthalate, an aliphatic polyester, a warp resisting amount of an arylene sulfide copolymer, filler, and optionally, colorants.

Abstract: A composition obtained by adding at least one specific elastomer and optionally a polyamide resin or a bromine-containing flame retardant to a melt-kneaded product of a polyphenylene sulfide with a non-blocked type polyfunctional isocyanate compound. The composition is excellent not only in impact resistance but also in aging resistance at high temperatures. Said composition can be advantageously used for molding parts of automobile engines, parts for various machines, connectors for electric or electronic parts, bobbines and the like.

Abstract: Bismaleimide resin systems containing low viscosity epoxy resins and a swellable or soluble thermoplastic when utilized to impregnate intermediate modulus carbon fiber are capable of preparing quasiisotropic composites, which, when cured, exhibit compression strengths after impact of greater than 47-50 ksi after an impact of 1500 in-lb/in.

Abstract: Low temperature heat curable arylene sulfide copolymer compositions which are particularly suitable for use in coating applications are provided. The compositions basically comprise a first arylene sulfide copolymer having unsubstituted para- and ortho-aromatic sulfide repeating units in the polymer chain, and a second arylene sulfide copolymer having unsubstituted para-aromatic sulfide repeating units and alkyl-substituted aromatic sulfide repeating units in the polymer chain.

Abstract: Disclosed herein is a crystallized, thin-wall container which is excellent in heat-resistance, oil-resistance, chemical stability under high temperature and high humidity and gas impermeability, is particularly suitable for heating foodstuffs packaged in it in electronic range, electric oven, etc. and is obtained by thermoforming a substantially amorphous sheet which has a crystallinity index of below 15% and an elongation of not less than 100% at room temperature and is obtained from a poly(arylene sulfide) which has a substantially linear structure, has not less thant 70 wt % of a repeating unit of ##STR1## and a logarithmic viscosity number of 0.2 to 1.0 in a solution of 1-chloronaphthalene (concentration of 0.4 g/dl at a temperature of 208.degree. C.) and a process for producing the container.