JP2006063255A - Piping member for fluid comprising polyarylene sulfide resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping member for a fluid, especially a member for a joint, hardly causing breakage, burst or the like by freezing even when the piping is exposed to open air at very low temperature, e.g. -40°C, and having good collision resistance at low temperature, breakage resistance at low temperature and the like. <P>SOLUTION: The piping member for the fluid, e.g. an elbow, a header, a cheese, a reducer, the joint and a coupler comprises a resin composition containing (A) a polyarylene sulfide resin and (B) a thermoplastic elastomer, and having ≥20 kJ/m<SP>2</SP>Charpy notched impact strength at -40°C. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes various organic / inorganic fluids, various solvents, fuels, various gases, liquefied gases, fluids having fluidity such as raw materials, intermediates and products in production of various polymers, drinking water, Hot water via hot water heaters, floor heating systems that rely on hot water, fertilizer-mixed water supply systems for cultivated vegetables, etc. Mainly used for transporting fluids containing water, especially pipe fittings About.

  Recently, plastic members have been promoted instead of metal materials for piping members. In the plastic material, for example, high-density polyethylene, cross-linked polyethylene, or the like is used as a piping member such as a pipe. However, these plastics are insufficient in heat resistance, and particularly in a structure having a joint due to heat of fluid. There were problems such as loosening of the joints and damage or rupture of the piping due to icing. In order to improve this, the technique using a polyphenylene sulfide resin composition is proposed (for example, refer patent document 1). However, even with this method, the effect of improving the damage and rupture due to the above-mentioned freezing was insufficient.

JP 2001-1115020 A

  In addition, a technique for improving damage, rupture, and the like due to freezing using a polyphenylene sulfide resin composition has also been proposed (see, for example, Patent Document 2). However, even if these methods are used, for example, the low temperature characteristics at −40 ° C. may be insufficient, and the improvement effect such as breakage and rupture due to freezing at a temperature of −40 ° C. is insufficient.

JP 2004-143372 A

  Accordingly, an object of the present invention is to provide a fluid having good low temperature collision resistance, low temperature rupture resistance, etc. that does not cause breakage or rupture due to freezing even when the piping is exposed to the outside air at an extremely low temperature, for example, −40 ° C. It is to provide a piping member, particularly a joint member.

As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have a PAS resin (A) and a thermoplastic elastomer (B) having a notched Charpy impact value at −40 ° C. of 20 kJ / m ² or more. It has been found that a fluid piping member formed by molding a resin composition containing) has good icing resistance (characteristic that the medium filled inside does not crack even if it freezes).

The present invention is based on such knowledge. That is, the present invention comprises a resin composition containing a polyarylene sulfide resin (A) and a thermoplastic elastomer (B) and having a notched Charpy impact value at −40 ° C. of 20 kJ / m ² or more. A fluid piping member is provided.

ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the member for fluid piping excellent in freezing resistance. In particular, the present invention is preferably applied to pipe fittings.

The resin composition must have a notched Charpy impact value at −40 ° C. of 20 kJ / m ² or more. The Charpy impact value is preferably as high as possible, but may be practically in the range of ^{20 to} 120 kJ / m ² . On the other hand, when the Charpy impact value is less than 20 kJ / m ² , the ice resistance in the fluid piping member is inferior, which is not preferable. The Charpy impact value can be measured, for example, by the method described later.

  The polyarylene sulfide resin (hereinafter abbreviated as PAS resin) used in the present invention is a polyphenylene sulfide resin (hereinafter abbreviated as PPS resin) having a repeating unit represented by the following general formula (1). It is desirable in terms of chemical resistance.

  Further, the PAS resin (A) can contain other copolymer structural units. Specific examples of the other copolymer structural units that can be contained are not particularly limited, and examples thereof include a meta bond represented by the following structural formula (2) and a structural formula represented by the following structural formula (3). Ether bond, sulfone bond represented by the following structural formula (4), sulfide ketone bond represented by the following structural formula (5), biphenyl bond represented by the following structural formula (6), the following structural formula ( Examples thereof include a substituted phenyl sulfide bond represented by 7), a trifunctional phenyl sulfide bond represented by the following structural formula (8), and a naphthyl bond.

  R in the structural formulas (7) and (8) each independently represents an alkyl group, a nitro group, an amino group, a phenyl group, or an alkoxy group. )

  The PAS resin (A) used in the present invention is a PPS resin containing 70 mol% or more of the repeating unit represented by the general formula (1), and is excellent in heat resistance, chemical resistance, and mechanical properties. Since the characteristics as a polymer are easily exhibited, it is preferable. In addition, when a bond having three or more functionalities such as the following structural formula (8) is contained, it is usually preferably 5 mol% or less, and more preferably 3 mol% or less so as not to increase the viscosity during melt molding.

  The method for obtaining the PAS resin (A) is not particularly limited, but taking a PPS resin as an example, (1) a method of polymerizing a dihalogen aromatic compound in the presence of sulfur and sodium carbonate, (2) a dihalogen A method of polymerizing aromatic compounds in the presence of a sulfidizing agent in a polar solvent, (3) a method of self-condensing p-chlorothiophenol, and (4) mixing and heating an organic polar solvent and a dihalogeno aromatic compound. In addition, a hydrous sulfiding agent is added thereto to react the dihalogenoaromatic compound and the sulfiding agent. At this time, the water content of the hydrous sulfiding agent is 2 to 50 mol% of the organic polar solvent. There is a manufacturing method that adds at a speed that falls within the range of

Among these, the production method (4) is easy to obtain a PPS resin having a large molecular weight. Moreover, this PPS resin is also preferable from the point that the Charpy impact value with a notch at −40 ° C. of the resin composition tends to be ²⁰ kJ / m ² or more.

  The molecular weight of the PAS resin (A) used in the present invention can be determined by gel permeation chromatography using 1-chloronaphthalene as a solvent. The PAS resin (A) has a peak molecular weight of preferably 35,000 or more because of the need for impact resistance and toughness at low temperatures, and preferably 200000 or less because of good flowability during molding. Among these, 40,000 to 100,000 is particularly preferable.

  The molecular weight of the PAS resin (A) generally has a very large molecular weight distribution, and the tailing on the left and right of the peak molecular weight tends to fluctuate greatly under production conditions. Therefore, there is a case where the difference between the number average molecular weight and the weight average molecular weight is large and does not represent the actual situation, and the peak molecular weight indicating the molecular weight of the largest number of molecules gathered in the molecular weight distribution is relatively high performance. It was decided to evaluate by the peak molecular weight. The method for measuring the peak molecular weight will be described in detail in Examples. When the peak molecular weight of the PAS resin is in the above range, the compatibility between the PAS resin (A) and the thermoplastic elastomer (B) is improved, and the low-temperature collision resistance of the fluid piping member of the present invention is improved.

  Further, as the PAS resin used in the present invention, a carboxyl group-containing polyarylene sulfide-based resin modified with a carboxyl group (hereinafter referred to as a CPAS-based resin) can be used.

Examples of the CPAS-based resin include a CPAS resin having a repeating structural unit represented by the following general formulas (9) to (11) and a PAS having a repeating unit represented by the structural formula (1). (Y in general formula (10) is —O—, —SO ₂ —, —CH ₂ —, —C (CH ₃ ) ₂ —, —CO—, or —C (CF _3). ) _2- )). Although the content of the repeating structural unit in the CPAS resin varies depending on the purpose of use and the like, it cannot be defined unconditionally, but it is 0.5 to 30 mol% in the CPAS resin, preferably 0.8 to 20 mol%. is there. The CPAS resin by such copolymerization may be a random type, a block type, or a graft type. The most typical example is a copolymer in which the PAS resin skeleton is a PPS resin skeleton and the CPAS resin skeleton is a carboxyl group-containing polyphenylene sulfide resin (CPPS) represented by the general formula (9). In this case, the PPS resin / CPPS resin is preferably 99.5 / 0.5 to 70/30 (weight ratio).

  Examples of the method for producing a CPAS resin by copolymerization include the following methods. For example, in the case of a random type, water is used in place of the alkali sulfide used in the method using the dihalogenoaromatic compound, the alkali metal sulfide, the dihalogenoaromatic carboxylic acid and / or the alkali metal salt thereof, or the production method thereof. Examples thereof include a method using an alkali metal sulfide compound and an alkali metal hydroxide.

  In the case of the block type, (1) a dihalogenoaromatic carboxylic acid and / or an alkali metal salt thereof and a sulfidizing agent (an alkali sulfide; an alkali metal hydrosulfide compound and a hydroxide) in a polar solvent in which a PAS prepolymer exists. (In combination with an alkali metal), (2) a method in which a dihalogenoaromatic compound and a sulfidizing agent are reacted in a polar solvent in which a CPAS prepolymer is present, and (3) a PAS prepolymer in a polar solvent. There is a method of reacting a CPAS prepolymer.

  As the PAS resin used in the present invention, an amino group-containing polyarylene sulfide resin (hereinafter referred to as APAS resin) modified with an amino group can be used. The amino group content in the APAS-based resin is preferably 0.1 to 30 mol% of the entire resin composition.

  This APAS resin can be obtained, for example, by polymerization in the presence of an amino group-containing aromatic halide when an alkali metal sulfide and dihalobenzene are reacted in an amide solvent such as N-methylpyrrolidone. it can.

  Examples of the amino group-containing aromatic halide that can be used for copolymerization of this APAS resin include the following general formula (12):

(In the formula, X represents a halogen atom, Z represents a hydrogen atom, an amino group or a halogen atom, R ₁ represents a hydrocarbon group having 1 to 12 carbon atoms, and m is an integer of 0 to 3). The compound represented by these can be mentioned.

  Specific examples of the compound include fluoroaniline, chloraniline, dichloroaniline, amino-chlorotoluene, chloro-phenylenediamine, bromoaniline, dibromoaniline, and iodoaniline. Mixtures can be used.

  The thermoplastic elastomer (B) used in the present invention is preferably meltable, mixed and dispersed at the temperature at which the PAS resin (A) is kneaded. From this point, an elastomer having a melting point of 300 ° C. or less and having rubber elasticity at room temperature is preferable. Among them, in terms of heat resistance, ease of mixing, and improvement in freezing resistance, among the thermoplastic elastomers (B), those having a glass transition point of −40 ° C. or less are preferable because they have rubber elasticity even at low temperatures. The glass transition point is preferably as low as possible, but is usually preferably in the range of -180 to -40 ° C, particularly preferably in the range of -150 to -40 ° C.

  The thermoplastic elastomer (B) is a heat having at least one functional group selected from the group consisting of epoxy groups, amino groups, hydroxyl groups, carboxyl groups, mercapto groups, isocyanate groups, vinyl groups, acid anhydride groups and ester groups. A plastic elastomer (B) is preferred from the viewpoint of improving low-temperature impact resistance, and among these, a functional group derived from a carboxylic acid such as an epoxy group or an acid anhydride, an acid, or an ester has a PAS resin (A). This is particularly preferable because the affinity of is increased.

  The thermoplastic elastomer (B) can be obtained, for example, by copolymerization of α-olefins and vinyl polymerizable compounds having the functional group. Examples of the α-olefins include α-olefins having 2 to 8 carbon atoms such as ethylene, propylene, and butene-1. Examples of the vinyl polymerizable compounds having the functional group include α, β-unsaturated carboxylic acids such as (meth) acrylic acid and (meth) acrylic acid esters and alkyl esters thereof, maleic acid, fumaric acid, and itacon. Examples include acids, other unsaturated dicarboxylic acids having 4 to 10 carbon atoms and mono- and diesters thereof, α, β-unsaturated dicarboxylic acids such as acid anhydrides and derivatives thereof, glycidyl (meth) acrylate, and the like.

  Among these, the molecule has at least one functional group selected from the group consisting of an epoxy group, an amino group, a hydroxyl group, a carboxyl group, a mercapto group, an isocyanate group, a vinyl group, an acid anhydride group, and an ester group. An ethylene-propylene copolymer or an ethylene-butene copolymer is preferably used, and an ethylene-propylene copolymer or an ethylene-butene copolymer having a carboxyl group is more preferable.

  The mixing ratio of the PAS resin (A) and the thermoplastic elastomer (B) is preferably 1 to 50 parts by weight of the thermoplastic elastomer (B) with respect to 99 to 50 parts by weight of the PAS resin (A). Among these, it is particularly preferable that the thermoplastic elastomer (B) is 5 to 50 parts by weight with respect to 99 to 50 parts by weight of the PAS resin (A). If the blending amount of the thermoplastic elastomer (B) is within this range, the freezing resistance of the fluid piping member of the present invention is good, and the resistance to deformation due to heat is particularly good.

  In the present invention, in addition to the PAS resin (A) and the thermoplastic elastomer (B), a group consisting of an epoxy group, an amino group, a hydroxyl group, a carboxyl group, a mercapto group, an isocyanate group, a vinyl group, an acid anhydride group and an ester group. By using together the reactive compound (C) having at least one functional group selected from the above, compatibility and freezing resistance of the resin composition are further improved.

  Examples of the reactive compound (C) include bisphenol A, resorcinol, hydroquinone, pyrocatechol, bisphenol F, saligenin, 1,3,5-trihydroxybenzene, bisphenol S, trihydroxy-diphenyldimethylmethane, 4 , 4'-dihydroxybiphenyl, 1,5-dihydroxynaphthalene, cashew phenol, glycidyl ether of bisphenol such as 2,2,5,5-tetrakis (4-hydroxyphenyl) hexane, halogenated bisphenol instead of bisphenol, butanediol Epoxy resins such as glycidyl ethers such as diglycidyl ether, glycidyl esters such as glycidyl phthalate, glycidyl amines such as N-glycidyl aniline, epoxidized polyolefin Non-glycidyl epoxy resins such as vinyl, epoxidized soybean oil and the like, and cyclic non-glycidyl epoxy resins such as vinylcyclohexenedioxide and dicyclopentadiene dioxide, maleic acid, fumaric acid, itaconic acid, and other non-carbon containing 4 to 10 carbon atoms. Saturated dicarboxylic acids and their mono and diesters are exemplified.

  Among these, an epoxy compound having three or more epoxy resins in the same molecule is particularly preferable. As a representative example of the compound, a novolac type epoxy resin can be used. The novolac-type epoxy resin is derived from, for example, a novolac-type phenol resin and epichlorohydrin. The novolac type phenol resin can be obtained, for example, by a condensation reaction of phenols and formaldehyde. The phenols are not particularly limited, but for example, phenol, o-cresol, m-cresol, p-cresol, bisphenol A, resorcinol, p-tertiary butylphenol, bisphenol F, bisphenol S and a mixture thereof are particularly preferable. Used for. Furthermore, an epoxidized product of poly-p-vinylphenol can also be used as an epoxy resin. The reactive compound (C) may have a halogen group or a hydroxyl group, and may be used alone or as a mixture of two or more.

  In particular, when a thermoplastic elastomer (B) having a functional group that reacts with an epoxy group and a compound having a reactive compound (C) having three or more epoxy groups are used, the resistance at −40 ° C. Impact properties are significantly improved. It is estimated that the interface between the PAS resin (A) and the thermoplastic elastomer (B) has a structure suitable for absorbing impact energy.

  The amount of the epoxy resin (C) used in the present invention is preferably 0.01 to 5 parts by weight with respect to 100 parts by weight of the total amount of the PAS resin (A) and the thermoplastic elastomer (B). 0.1 to 2 parts by weight is particularly preferable.

  In addition, the PAS resin composition used for the fluid piping member of the present invention has various reinforcements for the purpose of improving mechanical properties and molding processability within a range not impairing the object of the present invention. Materials and / or fillers may be added.

  Examples of the reinforcing material and filler that can be used in the present invention include glass fiber, carbon fiber, calcium titanate, potassium titanate, silicon carbide, aramid fiber, ceramic fiber, metal fiber, silicon nitride, barium sulfate, and sulfuric acid. Calcium, kaolin, clay, bentonite, sericite, zeolite, mica, mica, talc, wollastonite, ferrite, aluminum silicate, calcium silicate, calcium carbonate, dolomite, magnesium oxide, magnesium hydroxide, antimony trioxide, titanium oxide, Examples include iron oxide, milled glass, glass beads, and glass balloons.

  Furthermore, the following polymer can be mixed and used for the resin composition used for this invention in the range which does not impair the objective of this invention. Examples of the polymer include silicone resin, polyimide, polyethylene, polypropylene, polystyrene, styrene-butadiene copolymer, polyamide, polycarbonate, polysulfone, polyethersulfone, polyarylate, polyacetal, polyetherketone, polyetheretherketone. , Polybutylene terephthalate, polyethylene terephthalate, liquid crystal polymer, polyamideimide, polyetherimide and the like.

  In addition, the PAS resin composition used for the fluid piping member of the present invention has an antioxidant, a heat stabilizer, an ultraviolet absorber, a mold release agent, a rust preventive agent, as long as the object of the present invention is not impaired. A lubricant, a crystal nucleating agent, a coloring agent, and the like can be added.

  Moreover, the PAS resin composition used for the fuel piping member of the present invention can be prepared by various methods.

  As a preparation method, for example, a PAS resin (A), a thermoplastic elastomer (B), and a reactive compound (C) to be added as necessary are mixed in advance with a Henschel mixer or a tumbler, etc. Examples thereof include a method obtained by feeding to a biaxial extrusion kneader or the like and kneading at 200 to 360 ° C. and then pelletizing. In particular, it is preferable to use a twin-screw extrusion kneader that rotates in the same direction and includes a kneading disk for kneading.

  In addition, after the pelletization, an annealing process, a processing process such as UV irradiation or plasma irradiation can be performed.

  The member for fluid piping of the present invention is obtained by molding the resin composition. The fluid is gas, liquid, supercritical fluid, etc., for example, city gas, propane gas, nitrogen, oxygen, hydrogen, carbon dioxide, helium, neon, argon, halogen gas, water vapor, cold water, hot water, boiling water , Hot springs, various organic solvents, refrigerants, heating media, acids such as sulfuric acid, alkaline solutions such as aqueous sodium hydroxide, molten polymers and polymer solutions, and the like. Examples of fluid piping members include pipes, lining pipes, cap nuts, pipe joints (elbow, header, cheese, reducer, joint, coupler, etc.), various valves, valves, flow meters, gaskets (seal And various parts attached to the piping for conveying the fluid, such as packing).

  Examples of the molding method for the fluid piping member of the present invention include injection molding, extrusion molding, blow molding, and press molding. In particular, injection molding and extrusion molding are preferably applied. The fluid piping member of the present invention is characterized in that it is formed using a PAS resin (A), a thermoplastic elastomer (B), and a reactive compound (C) to be added as necessary. May be used alone or in at least one layer when a multilayer structure is formed.

  In the case of injection molding, a method of using a nest in a portion that becomes a fluid flow path and extracting the nest when the mold is released is preferably applied. When nesting is difficult to use, for example, when molding a U-shaped pipe or the like, an injection molding step of molding each of two or more constituent parts by injection molding using the PAS resin composition; A method including a joining step of joining the divided parts formed in the injection molding step to each other to form a U-shaped pipe or the like may be adopted. As an example of such a method, for example, a die slide molding method may be adopted. In the case of a multilayer structure, a two-color molding method may be adopted.

  In the case of extrusion molding, molding is performed using a tube die. In the case of a multi-layer structure, the molten resin extruded from the extruder of the number of layers or the number of materials is introduced into one multi-layer tube die, and the multi-layer structure is adhered by bonding within the die or immediately after taking out the die. Tubes can be manufactured. Alternatively, a method may be used in which a single-layer tube is once manufactured and another layer is laminated on the inside or outside thereof to manufacture a multilayer tube. In addition, when manufacturing the multilayer tube which consists of a multilayer structure of three or more layers, it is obtained by adding an extruder suitably, connecting each extruder to a coextrusion die, and extruding a multilayered parison.

  The fluid piping member of the present invention is excellent in chemical resistance and resistance to deformation, and is also excellent in icing resistance, and is preferably applied to pipe joints, and particularly preferable for a joint member.

  The following examples further illustrate the present invention. The part in an example shows a weight part. The present invention is not limited to the scope of these examples.

  The measurement values and evaluation criteria described below were measured and evaluated as follows.

(1) Low temperature impact resistance; Charpy impact test (under -40 ° C, with notch)
[Preparation of test piece]
A multi-purpose test piece of ISO 3167 type A was molded by an injection molding machine using pellets of the composition obtained by the method described below. Next, this multi-purpose test piece was cut into a length of 80 mm × width of 10.0 mm × thickness of 4.0 mm according to ISO 2818, and then a notch was cut according to ISO 2818.
[Measuring method]
In accordance with ISO 179, the test piece was allowed to stand completely in the liquid bath until it reached −40 ° C., then taken out from the liquid bath and subjected to an impact test within 5 seconds.

(2) Peak molecular weight: determined by gel permeation chromatography.
Apparatus: Ultra-high temperature polymer molecular weight distribution measuring apparatus SSC-7000 (manufactured by Senshu Kagaku), column: UT-805L (manufactured by Showa Denko), solvent: 1-chloronaphthalene, column temperature: 210 ° C., detector: UV detector (360 nm), molecular weight distribution was measured using six types of monodisperse polystyrene for calibration, and a differential weight molecular weight distribution in which the vertical axis was d (weight) / dLog (molecular weight) and the horizontal axis was Log (molecular weight) was obtained. The peak molecular weight was read from the horizontal axis.

(3) Glass transition point (Tg)
It measured based on JISK7121 using the differential scanning calorimeter ("PYRIS Diamond DSC" by Perkin Elmer).

(4) Filled water freezing test-measurement of low-temperature rupture resistance A cylindrical pipe joint with an inner diameter of 22 mm and an outer diameter of 28 mm, which can be sealed with a flange and screw structure at both ends, is prepared by injection molding from the resin composition to be evaluated. did. Fill with water in water so that it does not contain an air layer, seal both ends, remove from the water, place in a freezer at -40 ° C and leave for 2 hours to completely freeze the water inside. It was. Thereafter, the tube joint was taken out from the freezer, and cracks in the pipe joint were examined to evaluate low-temperature fracture resistance.

The components used in Examples and Comparative Examples are as follows.
PPS-1: Synthesized by the following synthesis method.
In a titanium reaction kettle with a stirring blade connected to a temperature sensor, cooling tower, dropping tank, dropping pump, distillate separation tank, p-DCB 1.838 kg (12.5 mol), NMP 4.958 kg (50 mol), water 0 0.090 kg (5.0 mol) was charged at room temperature, and the temperature was raised to 100 ° C. over 20 minutes under stirring in a nitrogen atmosphere. Close the system, after heating over a period of 40 minutes to 220 ° C., to control the internal pressure at that temperature to _{0.22MPa, Na 2 S · xH 2} O1.5kg, NaSH · yH 2 O 0.225kg, water 0.425 kg of a mixed solution (Na ₂ S: 11.4 mol, NaSH: 3.2 mol, moisture: 50.3% by weight) was added dropwise over 3 hours. During the dropping, dehydration was performed simultaneously, water was removed from the system, and p-DCB distilled together with water was continuously returned to the autoclave. The dehydration operation and the operation for returning the p-DCB were performed until the temperature increase at 240 ° C. was completed, and the system was sealed when the temperature increase was completed. Then, after maintaining for 1 hour at the same temperature and pressure, the internal temperature was raised to 240 ° C. while reducing the internal pressure to 0.17 MPa over 1 hour, and the reaction was terminated by holding at that temperature for 1 hour. Until cooled. The obtained reaction slurry was heated to 120 ° C. under reduced pressure (−0.08 MPa), the reaction solvent was distilled off, water was poured into the residue, and the mixture was stirred at 80 ° C. for 1 hour, followed by filtration. The cake was stirred again with warm water for 1 hour, washed, and then filtered. This operation was repeated three times, water was further added, the mixture was stirred at 200 ° C. for 1 hour, filtered, and dried with a hot air dryer at 120 ° C. for 10 hours to obtain a white powdery polymer. This polymer is hereinafter referred to as PPS-1. The peak molecular weight of PPS-1 was 40,700.

Examples 1-6 and Comparative Examples 1-2
Various raw materials and other raw materials were uniformly mixed at a ratio shown in Table 1 below, and then kneaded at 290 to 330 ° C. with a 35 mmφ twin-screw extruder to obtain pellets of a PAS resin composition. Using this pellet, the low temperature fracture resistance was evaluated according to the above-mentioned method. The results are shown in Table 1.

As materials other than the PPS-1 in Table 1, the following materials were used.
PPS-2; PPS resin [peak molecular weight 34,200 (“LR-2G” manufactured by Dainippon Ink & Chemicals, Inc.)]
PPS-3; PPS resin [peak molecular weight 16,000 (“B-100-C” manufactured by Dainippon Ink & Chemicals, Inc.)]
ELA-1; acid-modified ethylene-butene copolymer, Tg = −65 ° C. (“Tuffmer MH7020” manufactured by Mitsui Chemicals, Inc.)
ELA-2; acid-modified ethylene-propylene copolymer, Tg = −50 ° C. (“Tuffmer MP0430” manufactured by Mitsui Chemicals, Inc.)
ELA-3; ethylene-glycidylmethacrylic acid-methyl acrylate copolymer, Tg = −33 ° C. (“Bond First 7L” manufactured by Sumitomo Chemical Co., Ltd.)
ELA-4; ethylene-maleic anhydride-ethyl acrylate copolymer, Tg = −35 ° C. (“Bondyne AX8390” manufactured by Atofina Japan)
ADD: Cresol-Novolac type epoxy resin ("EPICLON N-695" manufactured by Dainippon Ink & Chemicals, Inc.)

Claims (10)

A fluid piping member comprising a resin composition containing a polyarylene sulfide resin (A) and a thermoplastic elastomer (B) and having a notched Charpy impact value at -40 ° C. of 20 kJ / m ² or more. . The member for fluid piping according to claim 1, wherein a glass transition point of the thermoplastic elastomer (B) is -40 ° C or lower. The member for fluid piping according to claim 1, wherein the thermoplastic elastomer (B) is an ethylene-propylene copolymer or an ethylene-butene copolymer. The thermoplastic elastomer (B) has at least one functional group selected from the group consisting of epoxy groups, amino groups, hydroxyl groups, carboxyl groups, mercapto groups, isocyanate groups, vinyl groups, acid anhydride groups and ester groups. The member for fluid piping according to claim 1. The member for fluid piping according to claim 4, wherein the thermoplastic elastomer (B) has a carboxyl group in its molecule. And a reactive compound (C) having at least one functional group selected from the group consisting of an epoxy group, an amino group, a hydroxyl group, a carboxyl group, a mercapto group, an isocyanate group, a vinyl group, an acid anhydride group, and an ester group. The member for fluid piping as described in any one of Claims 1-5 to contain. The member for fluid piping according to claim 6, wherein the reactive compound (C) is an epoxy compound having three or more epoxy groups. The member for fluid piping according to any one of claims 1 to 7, wherein the polyarylene sulfide resin (A) has a peak molecular weight of 35,000 to 200,000 as determined by gel permeation chromatography. The polyarylene sulfide resin (A) heats a mixture containing an organic polar solvent and a dihalogen aromatic compound, and the amount of water in the reaction system is 0.02 to 0.5 mol with respect to 1 mol of the organic polar solvent. The water-containing sulfidizing agent is supplied while being controlled within a range, and the dihalogen aromatic compound and the sulfidizing agent are reacted in the organic polar solvent. Fluid piping member. The fluid piping member according to any one of claims 1 to 10, wherein the fluid piping member is a pipe joint.