WO2008146862A1 - 配管部材 - Google Patents
配管部材 Download PDFInfo
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- WO2008146862A1 WO2008146862A1 PCT/JP2008/059847 JP2008059847W WO2008146862A1 WO 2008146862 A1 WO2008146862 A1 WO 2008146862A1 JP 2008059847 W JP2008059847 W JP 2008059847W WO 2008146862 A1 WO2008146862 A1 WO 2008146862A1
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- pipe
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C08L71/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C08L71/12—Polyphenylene oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
Definitions
- the present invention relates to a pipe member molded using a polyethylene ether resin composition, in particular, a pipe manufactured by extrusion molding, a joint manufactured by injection molding, extrusion molding, vacuum, pressure forming, etc., It relates to piping parts such as flanges.
- a pipe member molded using a polyethylene ether resin composition in particular, a pipe manufactured by extrusion molding, a joint manufactured by injection molding, extrusion molding, vacuum, pressure forming, etc.
- Polyphenylene ether resin compositions have excellent properties such as rigidity, heat resistance, and chemical resistance.
- industrial products there are: ⁇ A equipment ⁇ electric ⁇ electronic parts, housings, etc. (automotive products) For example, it is also used in foil caps, fenders, etc.).
- Polyphenylene ether resin compositions have resistance to acids and alkalis in high temperature range (60 to 95), and are relatively inexpensive among general-purpose engineering plastics. Suitable for high temperature piping members for flowing high temperature chemicals in the industrial field. Such high temperature pipe members tend to be converted from conventional metal pipes to resin pipes, and a polyphenylene ether resin composition is also a candidate for the conversion.
- a heat resistant water distribution piping made of a polyphenylene ether resin composition containing a polyphenol ether resin and a polystyrene resin has been disclosed (Patent Reference 1).
- polystyrene resins are homopolystyrene, high impact polystyrene modified with rubber components. It was at least one selected from the group consisting of impact-resistant polystyrene) and polystyrene having a syndiotactic structure. The effect is that it can be used to replace vinyl chloride resin pipes used conventionally, and can be used in applications that require heat resistance, which can not be used for vinyl chloride resin pipes. Met.
- a resin tube obtained from the resin composition for piping which is 0 parts by weight (see Patent Document 2). The effect is to improve the impact resistance, and further to be excellent in chemical resistance, releasability, heat resistance and also having flame retardancy.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2 0 0 3-7 4 7 5 4
- Patent Document 2 Japanese Patent Application Laid-Open Publication No. 20050-2 2 3 9 7 8 4 Disclosure of the Invention
- melt flow rate hereinafter referred to as MFR
- Patent Document 1 melt flow rate 1
- Patent Document 2 melt flow rate 2
- Patent Document 3 melt flow rate 3
- Patent Document 3 melt flow rate 3
- Patent Document 3 melt flow rate 3
- Patent Document 3 melt flow rate 3
- the MFR value is too small, there is a problem that the flowability of the resin is deteriorated and the piping member can not be formed.
- the MFR value is increased, the fluidity of the resin is improved, but on the other hand, the molecular weight is decreased, which causes a problem that high temperature creep characteristics, chemical resistance and the like are deteriorated.
- the pipe can be formed but the flowability of the pipe is too good, and the pipe will be unevenly thickened under the influence of gravity, and the pipe will be warped to obtain a good pipe. There was a problem that it could not be done, and if the value of MFR deviated far from the preferable range, a draw down would occur and the pipe could not be manufactured. Therefore, in applications of piping members that are directly wetted and subjected to internal pressure, conventional heat resistant water distribution piping can not be molded as a piping member or does not sufficiently meet the required performance depending on the composition of the resin composition. There was a problem that there was.
- Patent Document 2 discloses that the MFR is 18 to 54 in the embodiment, the value of MFR is too large in such a range, so that the chemical solution is added to the fluid.
- the piping member especially the pipe
- the piping member has a large diameter (50 mm or more)
- the value of MFR is large, the diameter will be small, but there is no problem even if the diameter is large.
- the warping makes it difficult to obtain a good molded product, and when the MFR value is too large, there is a problem that drawdown occurs and the pipe can not be extrusion molded.
- the surface of the molded product may leak silver bubbles, air bubbles, etc.
- the appearance defect rate of the molded product is high in the case of a piping member in which the appearance defects of the product are easily generated and the products having a large thickness (thickness of 5 mm or more) are generally large.
- the present invention overcomes the disadvantages of the above-mentioned conventional polyphenylene ether resin compositions, has excellent high-temperature creep properties, has rigidity in a high temperature range (60 to 95), and produces the same as vinyl chloride resin.
- the purpose is to provide piping members that can be used and have good formability and good appearance.
- the inventors of the present invention conducted intensive studies to develop a polyphenylene ether-based resin composition having the above-mentioned preferable properties, and as a result, a certain proportion of a polyphenylene ether-based resin and a polystyrene-based resin are essential, It has been found that the above object can be achieved by setting the resin composition later to a specific MFR, and the present invention has been completed.
- the melt flow rate after kneading is 1.0 to 5.O g, which comprises 50 to 120 parts by mass of polystyrene based resin as an essential component with respect to 100 parts by mass of polyphenylene ether type resin.
- the first feature is that the resin composition is a Z 10 component, and the second feature is that the molding shrinkage ratio is 0.5 to 0.5%.
- the fourth feature is that the water content of the resin composition after the kneading before molding is less than 250 ppm.
- the pipe member is a pipe or a joint, and the outer diameter D and thickness t of the pipe or the joint 1) D> 4 8 mm, 2) 1 Z 3 5
- D ⁇ t ⁇ 1 Z 9 D is a sixth feature.
- Polyphenylene ether resins have high mechanical strength and elastic modulus, but they have poor fluidity and thus can not be molded by using polyethylene ether resins alone. The liquidity needs to be improved.
- Resins used for this composition include polystyrene resins, polyamide resins, polypropylene resins, etc., but the properties required for piping members (high temperature creep characteristics, molding shrinkage, chemical resistance, price etc.) It is necessary to be a polystyrene resin because it has a good balance.
- a piping member made of a polyphenylene ether resin composition is used as a piping member for high temperature
- the required characteristics require a strength that can be used for a long time even if a high temperature fluid is flowed under an internal pressure.
- SDR outside diameter / wall thickness
- a high temperature creep property equal to or higher than the strength which does not break for 10 years when a pressure of 0.4 MPa is applied is required.
- the blending ratio of the polyphenylene ether resin and the polystyrene resin needs to be in a range that satisfies the characteristics required for the above-described high temperature pipe member, and the polyphenylene ether resin 1
- the blending amount of the polystyrene resin needs to be 50 to 120 parts by mass with respect to 00 parts by mass.
- Polystyrene-based resin is used to improve impact strength and improve flowability to improve moldability.
- the amount is preferably 50 parts by mass or more, and the amount of the polystyrene-based resin is preferably 120 parts by mass or less in order to have good high-temperature creep properties, suppress a decrease in mechanical strength, and maintain heat resistance.
- the molding shrinkage ratio of the polyvinyl ether resin composition is vinyl chloride Since it is a range close to the molding shrinkage of resin, it is also suitable for obtaining a molding shrinkage equivalent to vinyl chloride resin.
- the polyphenylene ether resin composition may be a blend of a polyphenylene ether resin and a polystyrene resin, both may be graft copolymerized, and graft copolymer is preferable. As a result, good processability and long-term physical properties can be obtained, and in particular, high-temperature creep characteristics become good.
- the M F R of the polyphenylene ether resin composition needs to be 1.0 to 5.0 g Z 10 minutes.
- a pipe of at least 1.0 g Z 10 should be used.
- the content is preferably not more than 5.O g Zl O.
- M F R of the polyphenylene ether resin composition is measured under the conditions of a test temperature of 250 T: and a test load of 10 kg in accordance with J I S K 720.
- the molding shrinkage of the polyphenylene ether resin composition is 0.5 to 0.5%, and more specifically, the flow direction in a molded article having a thickness of 10 mm.
- the molding shrinkage ratio of 0.6 It is more preferable that the mold shrinkage ratio in the perpendicular direction be 0.5 to 0.7%.
- the molding shrinkage of the resin composition changes depending on the type of resin and the amount of the blended resin, if it is a polyphenylene ether resin composition having a molding shrinkage of 0.5 to 0.8%.
- the polyvinyl chloride resin used for the piping member is almost the same as the molding shrinkage rate of the polyvinyl chloride resin
- the injection molding of the polyurethane resin composition using a mold for the polyvinyl chloride resin piping member for example, The pipe member thus obtained can obtain a pipe member of substantially the same size as the pipe member molded of vinyl chloride resin. Therefore, it is possible to share the same manufacturing equipment as the conventional vinyl chloride resin, and there is no need to expand the manufacturing equipment for the polyvinyl ether resin composition in order to align the product lineup.
- the piping member holds the holding time when the tensile load is changed at the same temperature, referring to DIN 8 0 7 8 and the Naday equation It can be converted from the circumferential stress-time specific graph.
- Applying a tensile load can be considered as applying a pipe internal pressure to a pipe member (pipe), and the pipe internal pressure corresponding to the tensile load changes depending on the pipe thickness and the pipe outer diameter. It is calculated from the equation of The test stress in equation 1 is the tensile load.
- Pipe internal pressure (2 X pipe thickness X test stress) / (pipe outer diameter-pipe thickness) ⁇ ⁇ ⁇ Formula 1
- OMP a under an atmosphere of 95 have a time to failure of 1000 hours or more. This is a pipe thickness of 6.
- O mm for a pipe with a pipe outer diameter of 63 mm, the tensile load from equation 1 is 5
- OMP a is the pipe internal pressure 1.
- OMP a and the pipe internal pressure of 1.
- OMP a is applied in the atmosphere at 95 to hold for over 1000 hours.
- the internal pressure is 0.6 MP when converted from the Naday equation and the circumferential stress-time specific graph referring to DIN 8 0 7 8 As it becomes a, the pipe has a life of 10 years at an internal pressure of 0.6 MP a under an atmosphere of 95.
- the pipe member made of a general polypropylene-based resin composition of other materials used as a pipe member for high temperature for example, the pipe thickness 6.0 mm and the pipe outer diameter 63 mm
- Applying an internal pressure of 1.0 MP a to the pipe in an atmosphere of 95 will lead to destruction in about 10 hours, and trying to hold it for 100 hours or more in an atmosphere of 95 at 0. 0. 0.
- the pipe internal pressure It is necessary to lower the pipe internal pressure to 7 MP a.
- the internal pressure is 0.4 MP a when this is converted so that the holding time is 10 years under 95 atmospheres.
- the allowable pressure of the piping member made of the polyethylene ether resin composition is 1.5 times that of the piping member made of the polypropylene resin composition, and it can be used for higher pressure applications.
- the blending amount of the polystyrene based resin per 100 parts by mass of the polyethylene based resin of the polyphenylene ether based resin composition of the present invention is 50 It is more preferably 105 parts by mass, and the MFR after kneading is 1.5 to 4.5 g / 10 min.
- the polypropylene resin composition may be near the softening temperature, and the resin composition is softened under the atmosphere at 100. Since the polycarbonate resin composition does not soften while the strength as a piping member can not be maintained sufficiently, the working pressure is reduced when the temperature, tensile load, and holding time are converted. 6. 0 mm, outside In the case of a pipe with a diameter of 63 mm, the internal pressure will be 0.2 MP a) in order to set the holding time to 10 years under an atmosphere of 100 mm, but it can be used without a problem.
- it should be less than 250 ppm, and ideally 0 ppm.
- a thick-walled molded product for example, a pipe having a diameter of 50 mm or more and a wall thickness of 5 mm or more
- appearance defects and air bubbles are easily generated due to the water content. .
- the drying temperature of the polycarbonate resin composition for reducing the water content to less than 250 ppm is set to about 10 hours at 10 0 to 10 10 It is recommended that the drying time be about 24 hours at 90 to 100 °.
- the polyphenylene ether-based resin composition of the present invention may contain another polymer in the polyphenylene ether-based resin composition as long as it is within the allowable range of the properties required as a piping member.
- the other polymer is not particularly limited as long as it does not deteriorate the properties required as a piping member, but styrene / butadiene rubber is particularly preferred, and styrene / butadiene rubber is compounded.
- the impact strength can be improved while maintaining the high temperature creep characteristics.
- the blending ratio of the styrene-butadiene rubber is preferably 1 to 15 parts by mass. This is preferably 1 part by mass or more in order to obtain good high temperature creep characteristics and impact strength, and 15 parts by mass or less in order to obtain good heat resistance and rigidity.
- the total amount of the other polymers is preferably 1 to 15 parts by mass with respect to 100 parts by mass of the polyurethane resin.
- the styrene content of the styrene / butadiene rubber is preferably 10 to 40%, more preferably 15 to 35%. If the styrene content of the styrene-butadiene rubber is too small, the change in physical properties will be small, and if too large, the modulus of elasticity will be low and the mechanical strength will be weak, but the flowability will be good and the formability of piping members will be improved. It has a relationship of Therefore, in order to satisfy the good high temperature creep characteristics and impact strength required for piping members in a well-balanced manner, the styrene content is preferably 10% or more, and good high temperature creep characteristics and impact strength can be obtained after obtaining good compatibility.
- the styrene content is preferably 40% or less to satisfy the above in a balanced manner.
- the weight average molecular weight of the styrene / butadiene rubber of the present invention is preferably at least 2,000,000.
- a styrene butadiene rubber having a weight average molecular weight of 200,000 or less is blended with a polyphenylene ether resin composition, the impact strength is improved but the high temperature creep characteristics are significantly impaired. Therefore, it is used as a piping member for high temperature In order to obtain good high temperature creep properties and impact strength, it is better to have at least 2,000,000.
- the weight average molecular weight of the styrene / butadiene rubber is made higher, the high temperature creep properties are improved, so the upper limit of the weight average molecular weight is not particularly limited, but the styrene weight may be increased by the increase of the weight average molecular weight.
- the styrene weight may be increased by the increase of the weight average molecular weight.
- several millions are practically preferable, and specifically, 200,000 to 300,000 are preferable.
- Polyphenylene ether resin and polystyrene resin It is desirable that the MFR after kneading of the styrene / butadiene rubber does not change or is lower than that before kneading, so that the styrene / butadiene rubber can not measure MFR so as not to increase the MFR after kneading. If it has a high molecular weight, the MFR after kneading can be rather reduced (see Example 5 and Example 6 in Table 1).
- Example 6 Due to the difference in molecular weight of the styrene-based rubber, Example 6 The MFR after kneading of the molecular weight of 30,000 in Example 5 is lower than the MFR after kneading when the molecular weight is 100,000), and the styrene / butadiene rubber has such a high molecular weight that the MFR can not be measured. In order to achieve the above, it is necessary that the weight average molecular weight be at least 200,000.
- any method and catalyst may be used for the polymerization method and polymerization catalyst of the styrene / butadiene rubber of the present invention.
- the hydrogenation rate be close to 100%, and specific hydrogenation should be carried out.
- the rate is preferably 85% or more, more preferably 90% or more, and still more preferably 95% or more from the viewpoint of weatherability, heat resistance and chemical resistance.
- the effect of the wall thickness is small when the diameter is small, but when the diameter is large (diameter 50 mm or more), the relationship between the outer diameter of the pipe and the thickness is heat resistance or high temperature. Affects creep characteristics.
- resin pipes vinyl chloride resin, polyethylene, polypropylene, etc.
- a wall thickness suitable for long-term endurance is required.
- the thickness t is 1 3 5 D ⁇ t
- the range of ⁇ 1/9 D is preferable. Meat in order to maintain the pressure resistance that does not hinder the use of piping members
- the thickness t should be greater than 1 35 D, and should be less than 1/9 D in order to reduce the amount of resin composition used and to make the tube not too heavy.
- the range of suitable wall thickness t differs depending on the outer diameter D of the pipe, and l Z l 7 D ⁇ t ⁇ l 9 D is more suitable when 48 mm ⁇ D ⁇ 100 mm.
- polyphenylene ether-based resin of the present invention known resins can be used without particular limitation, and they can be used alone or in combination, and they may be in the form of a copolymer or a poly (2,6-dimethyl-1). , 4-phenylene) ether, poly (2-methyl-6-ethyl-1,4-phenyl) ether, poly (2,6-jetyl-1,4 _phenylene) ether, poly
- Polystyrene-based resins used in the polyphenylene ether-based resin composition of the present invention are homopolymers of styrene and styrene derivatives, for example, polystyrene, rubber-modified polystyrene (high-impact polystyrene), syndiotactic polystyrene, etc.
- styrene copolymers such as styrene / acrylonitrile copolymer (AS resin), styrene / acrylonitrile / butadiene copolymer (ABS resin), etc. may be mentioned.
- AS resin styrene / acrylonitrile copolymer
- ABS resin styrene / acrylonitrile / butadiene copolymer
- high impact polystyrene is preferable from the viewpoint of good compatibility and improvement in impact strength.
- polyphenylene ether-based resin composition of the present invention may optionally contain a stabilizer such as an antioxidant, an ultraviolet light absorber, or a light stabilizer, and the composition according to these compounds. Can improve the thermal stability and light resistance of a stabilizer such as an antioxidant, an ultraviolet light absorber, or a light stabilizer, and the composition according to these compounds. Can improve the thermal stability and light resistance of a stabilizer such as an antioxidant, an ultraviolet light absorber, or a light stabilizer, and the composition according to these compounds. Can improve the thermal stability and light resistance of
- antioxidant for example, 2, 6-di-t-butyl- 4- methylphenyl, n- octyl ester decyl-3 (4. 1 hydroxyl-3, 5'-di-t-butylphenyl) Propionate, 2,2'-methylenebis (4 methyl-6 _ t-butyl phenol), 2, 2 'methylenebis (4 ethyl)-6 t-butyl phenol, 2,4 bis bis ((octylthio) Methyl) 10-cresol, 2 — t-peptyl — 6 — (3-t-peptyl-2—hydroxyl_ 5 — methyl benzyl) mono-methylphenyl acrylate, 2, 4 — Di-t-a-mil 6-[1- (3, 5-Di- t-a-mil 2-hydroxy-phenyl) hydroxyethyl] phenyl acrylate 2-1-(2-Hydroxy 3, 5- Di-tert-Penty
- UV absorbers and light stabilizers examples include 2— (2′-hydroxy-5 ′ ′-methylphenyl) benzotriazole and 2— (2′-hydroxy-3,5,5-t-butylphenyl) benzotriazole.
- 2-(2, 1-hydroxy-3 ', 5,-di-t-butyl-phenyl-1-5-benzotriazole-based ultraviolet absorbers such as benzothiotriazole, 2-hydroxy 4-methoxide
- Mention may be made of benzophenone-based ultraviolet absorbers such as benzophenone and the like, light-identical ultraviolet absorbers and hindered amine-based light stabilizers.
- the polyphenylene ether-based resin composition of the present invention may be a spherical filler, a plate-like filler, a fiber-like filler, etc. May be blended with inorganic fillers. These may be used alone or in combination of two or more.
- spherical fillers include calcium carbonate, barium sulfate, calcium sulfate, clay, pearlite, shirasu balloon, diatomaceous earth, calcined alumina, calcium silicate and the like.
- plate-like fillers include evening milk and personal strength.
- fibrous fibers include glass fibers, carbon fibers, boron fibers, carbon dioxide fibers, potassium titanate fibers, polyamide fibers, polyester fibers, polyarylate fibers, polyimide fibers and the like.
- flame retardants halogen-based such as chlorinated polyethylene and decabromodiphenyl ether, phosphorus-based such as tricresyl phosphate, inorganic such as aluminum hydroxide
- lubricants fluidized Hydrocarbons such as toluene, fatty acids such as stearic acid, stearyl Higher alcohols such as alcohols, amides such as stearic acid amide, metals such as calcium stearate, antistatic agents (polyalkylene glycol, compounds containing sulfonic acid group, etc.), antibacterial agents (zeolite etc.)
- organics such as 2- (4_ thiazolyl) benzimidazole, etc.
- colorants inorganics such as titanium oxide, organics such as carbon black
- the blending amount thereof varies depending on the type of the additive, it is preferable to blend an amount such that the effect of the additive is sufficiently exhibited without reducing the physical properties of the composition.
- melt-kneading after blending as described above and a polyphenylene ether resin in which each component is uniformly dispersed by using a single-screw extruder, a twin-screw extruder, a kneader, etc.
- a composition can be obtained.
- the pipe member using the polyferylene ether resin composition of the present invention particularly relates to a pipe and a joint, and the molding method is not particularly limited, and a pipe manufactured by extrusion molding, a multilayer pipe, an injection molding Fittings, flanges, etc. manufactured by vacuum and pressure forming.
- the performance of the piping member made of the polyethylene ether resin composition of the present invention was evaluated by the following test method.
- the contents of the evaluation were the evaluation of the mechanical properties of a pipe extruded from a different composition of polyphenylene ether resin composition, and the extrusion molded from a polyphenylene ether resin composition of different MFR and different water content.
- Evaluation of pipe formability and appearance, Polyphenylene ether resin and polystyrene It is evaluation of the molding shrinkage rate of the joint injection-molded from the polyphenylene ether type-resin composition from which the compounding ratio of resin differs.
- Measurement was performed under the conditions of a test temperature of 250 and a test load of 10 kg according to J I S K 720.
- Notched Izod impact test pieces were cut out from a pipe made of a polyethylene ether resin composition according to J I S K 7 1 0 10, and the Izod impact strength was measured in an atmosphere at 23 3 ⁇ 1.
- the inner pressure of the pipe made of polycarbonate ether resin composition per 100 mm is 95 ⁇ 1 and the internal pressure 1.
- OMP a pipe thickness 6. O mm, outer diameter
- OMP a at 63 mm, tensile load was calculated from the equation of Naday in Equation 1), and the time to failure was measured.
- Pipe internal pressure (2 X pipe thickness X test stress) / (pipe outer diameter-pipe thickness) ⁇ ⁇ ⁇ Formula 1
- Cylindrical test pieces (vinyl chloride resin mold, standard dimensions: outer diameter 70 mm, width (length of cylinder) 13 3 mm, wall thickness 6 mm) are molded with an injection molding machine, and 2 3 in the atmosphere After leaving for 2 days, the dimensions of the outer diameter (2 points in the diametrical direction) and the width (4 points at equal intervals on the outer circumference) were measured. In the measurement, 10 test pieces were measured, the average value of the outer diameter and the width was calculated, and the molding shrinkage ratio of each was calculated from Formula 2 from the average value of the outer diameter and the width. Similarly, a vinyl chloride resin was similarly molded as a comparative object, and the dimensions were measured, and the molding shrinkage ratio was calculated from Formula 2. The standard dimensions are the dimensions targeted by molded products, and are the product dimensions. Moreover, the mold for vinyl chloride resin used in this test was: Dimensional tolerance to the reference dimension when molded with
- the mold dimensions are designed to have an outer diameter of 7 0.5 9 mm and a width 1 3 3.8 l mm.
- the molding shrinkage of width is within the range of 0.5 to 0.8% (The shrinkage of the outer diameter is larger than the original molding shrinkage because the test piece is cylindrical and there is space inside. Therefore, the comparison is made with the width), and it is accepted that the outer diameter of the reference dimension is within ⁇ 0.2 mm and the width is within ⁇ 0.2 mm.
- Mold shrinkage factor ⁇ (Dimension of mold dimension one test piece dimension) Mold dimension ⁇ X I 0 0 ⁇ Formula 2
- Polyphenylene ether resin 100 parts by mass, high impact 80 parts by mass of styrene were blended, pelletized by kneading in the same manner as in Example 1, and a polyolefin ether resin composition having a MFR of 1.57 after kneading was produced.
- the resulting resin composition was dried to make the water content less than 250 ppm, and then the pipe was molded.
- Table 1 results of various physical property evaluation tests are shown in Table 1. Also, the results of evaluation of extrusion moldability and appearance are shown in Table 2.
- Example 5 100 parts by mass of polyphenylene ether resin and 100 parts by mass of high impact polystyrene are blended, kneaded and pelletized in the same manner as in Example 1, and the MFR after kneading is 4.50. Polyphenylene ether resin composition was produced. The resulting resin composition was dried to make the water content less than 250 ppm, and then the pipe was molded. The results of various physical property evaluation tests are shown in Table 1. Table 2 shows the results of evaluation of extrusion moldability and appearance, and Table 3 shows the results of measurement of molding shrinkage. Example 5
- Example 6 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high-impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 30%, weight average molecular weight: 20,000 1) The 3 mass parts are kneaded and pelletized in the same manner as in Example 1, and the MFR after kneading is A polyphenylene ether resin composition of 3.6 was produced. The resulting resin composition was dried to make the water content less than 250 ppm, and then the pipe was molded. The results of various physical property evaluation tests are shown in Table 1.
- Example 6 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high-impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 30%, weight average molecular weight: 20,000 1) The 3 mass parts are kneaded and pelletized in the same manner as in Example 1, and the MFR after kneading
- Example 8 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high-impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 5%, weight average molecular weight: 30,000) 13 parts by mass of the mixture was kneaded and pelletized in the same manner as in Example 1 to prepare a polyolefin ether resin composition having a MFR of 3.2 after kneading. The resulting resin composition was dried to make the water content less than 250 ppm, and then the pipe was molded. The results of various physical property evaluation tests are shown in Table 1.
- Example 8 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high-impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 5%, weight average molecular weight: 30,000) 13 parts by mass of the mixture was kneaded and pelletized in the same manner as in Example 1 to prepare
- Example 9 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 50%, weight average molecular weight: 23,000) 13 parts by mass was kneaded and pelletized in the same manner as in Example 1 to prepare a polyphenylene ether resin composition having an MF of 4.5 after kneading. The resulting resin composition was dried to make the water content less than 250 ppm, and then the pipe was molded. The results of various physical property evaluation tests are shown in Table 1.
- Example 9 100 parts by mass of polyphenylene ether resin, 80 parts by mass of high impact polystyrene, and hydrogenated styrene-butadiene rubber (styrene content: 50%, weight average molecular weight: 23,000) 13 parts by mass was kneaded and pelletized in the same manner as in Example 1 to prepare a polyphenylene ether resin composition having an
- Example 2 The same polyphenylene ether-based resin composition as in Example 1 was produced, and a pipe was molded without being dried. The water content of undried was about 380 ppm. Table 2 shows the results of evaluation of extrusion formability and appearance.
- the Izod impact strength is 7 KJZ m 2 or more (7 KJZ m 2 or more is necessary so that the piping member is not easily broken), and the high temperature creep characteristic is 600 hours or more (the pipe has a life of about 5 years when the internal pressure is 0.6 MP a under the atmosphere of 95), there is no occurrence of warpage in extrusion formability, and there is no appearance defect of the pipe Is the minimum passing line.
- Example 1, Example 2, and Comparative Example 1 are compared, although the blending ratio of the polyphenylene ether resin and the polystyrene resin is the same, the high temperature creep is due to the difference in MFR after kneading.
- Example 1 and Example 2 show no change in high temperature creep characteristics, but the high temperature creep characteristics of Comparative Example 1 are lowered to about 45 of Example 1 because of the large MFR. This is because when the MFR decreases, the molecular weight of the polyphenylene ether resin decreases, and when the molecular weight decreases, the high temperature creep characteristics deteriorate.
- Example 1 Example 3, Example 4, Comparative Example 2 and Comparative Example 3 in Table 1, the high temperature creep characteristics, the impact strength, etc. according to the blending ratio of the polystyrene based resin to the polyphenylene ether based resin
- Example 1 Comparing Example 1 with Example 5, the impact strength can be improved while maintaining the high-temperature creep property by blending an appropriate amount of styrene butadiene rubber. Further, comparing Example 5 to Example 9, the optimum conditions of the styrene butadiene rubber are: weight average molecular weight of styrene, styrene content, styrene relative to 100 parts by mass of polyphenylene ether resin It can be seen that it is determined by the amount of butadiene rubber.
- the weight average molecular weight of styrene is lower than that of the styrene butadiene rubber of Example 5 because the weight average molecular weight of the styrene butadiene rubber of Example 6 is as small as 10,000.
- the high temperature creep properties of Example 6 are degraded.
- the styrene content in Example 7 is 5% less than the styrene content in Example 5 at 30%, so that the compatibility with the polyethylene ether resin is deteriorated because the styrene content is 5%, and the high temperature is high. The creep characteristics are degraded and the impact strength is not improved.
- Example 8 since the styrene content is as high as 50%, the compatibility with the polyethylene ether resin is improved and the impact strength is improved, but the high temperature creep property is slightly deteriorated.
- the amount of styrene butadiene rubber relative to 100 parts by mass of the polyphenylene ether resin is as large as 18 parts by mass of Example 9 as compared with 13 parts by mass of Example 5 that the impact is increased. Although the strength is improved, the high temperature creep characteristics are deteriorated.
- a styrene / butadiene-based rubber having a styrene content of 10 to 40% and a weight average molecular weight of 200,000 or more relative to 100 parts by weight of a polyphenylene ether resin is 1 to 1 Mix 5 parts by mass
- Comparative Example 5 has no difference in the physical properties per se compared to Example 1, but when the water content was high, silver streaks sometimes occurred on the surface of the formed pipe. From this, when the water content of the resin composition before molding is less than 250 ppm, molding of a good appearance can be performed.
- the molding shrinkage ratio changes depending on the blending ratio of the polystyrene resin to 100 parts by mass of the polyethylene ether resin.
- the molding shrinkage ratio of Example 1, Example 3, Example 4 and Comparative Example 3 is in the range of 0.5 to 0.8% and within the range of the tolerance of the reference dimension. It is possible to obtain a molded article equivalent to a molded article obtained by From this, it is possible to use the same mold as vinyl chloride resin. Further, if it is polystyrene resin 50 to 120 parts by mass with respect to 100 parts by mass of the polyethylene ether resin, it can be made within the range of almost the same molding shrinkage as vinyl chloride resin.
- the polyphenylene ether resin composition of the present invention is excellent in high-temperature creep characteristics and impact strength in a well-balanced manner, and the flowability at the time of molding can be secured, and a good molded article can be obtained. Therefore, it can be used for a long time even if flowing chemicals such as acid and alkali in the high temperature range (at 60 to 95), and it can be used around l OQ ⁇ .
- the addition of a styrene / butadiene rubber can improve the impact strength without deteriorating the high temperature creep characteristics.
- the piping member produced using the polyethylene ether resin composition of the present invention has the following excellent properties.
- a piping member having an excellent balance between high temperature creep properties and impact strength by using, as an essential component, 50 to 120 parts by mass of polystyrene based resin per 100 parts by mass of polyethylene terephthalate resin. You can earn
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880014690A CN101679742A (zh) | 2007-05-28 | 2008-05-22 | 配管部件 |
US12/595,670 US20100136272A1 (en) | 2007-05-28 | 2008-05-22 | Piping member |
EP08764816A EP2154200A4 (en) | 2007-05-28 | 2008-05-22 | PIPE CONNECTOR |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-140644 | 2007-05-28 | ||
JP2007140644A JP2008291183A (ja) | 2007-05-28 | 2007-05-28 | 配管部材 |
Publications (1)
Publication Number | Publication Date |
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WO2008146862A1 true WO2008146862A1 (ja) | 2008-12-04 |
Family
ID=40075099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2008/059847 WO2008146862A1 (ja) | 2007-05-28 | 2008-05-22 | 配管部材 |
Country Status (7)
Country | Link |
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US (1) | US20100136272A1 (ja) |
EP (1) | EP2154200A4 (ja) |
JP (1) | JP2008291183A (ja) |
KR (1) | KR20100017186A (ja) |
CN (1) | CN101679742A (ja) |
TW (1) | TW200904897A (ja) |
WO (1) | WO2008146862A1 (ja) |
Cited By (1)
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JP2021073340A (ja) * | 2015-10-16 | 2021-05-13 | 株式会社ブリヂストン | 多元共重合体、ゴム組成物、架橋ゴム組成物、ゴム製品、及びタイヤ |
Families Citing this family (4)
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JP6480261B2 (ja) * | 2015-05-21 | 2019-03-06 | 旭化成株式会社 | 樹脂組成物 |
JP6647003B2 (ja) * | 2015-10-16 | 2020-02-14 | 旭化成株式会社 | 配管用成形品 |
EP3388142A1 (en) | 2017-04-11 | 2018-10-17 | Asahi Kasei Kabushiki Kaisha | Separation membrane module with specific housing material |
WO2024106340A1 (ja) * | 2022-11-15 | 2024-05-23 | ヤマハ発動機株式会社 | 樹脂成形品の製造方法 |
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EP0196407A2 (de) | 1985-03-04 | 1986-10-08 | Hüls Aktiengesellschaft | Verfahren zur Herstellung eines festen Verbundes zwischen Formmassen auf Basis von Polyphenylenethern einerseits und Doppelbindungen enthaltenden, mit Schwefel vulkanisierbaren Kautschuken andererseits |
EP0201874A2 (de) | 1985-05-14 | 1986-11-20 | BASF Aktiengesellschaft | Thermoplastische Formmassen |
JPH08238717A (ja) | 1995-03-02 | 1996-09-17 | Sumitomo Metal Ind Ltd | 樹脂被覆鋼材 |
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ATE261744T1 (de) * | 1994-01-06 | 2004-04-15 | Scimed Life Systems Inc | Ballonkatheter mit thermoplastischem polyimide- ballon |
JP2005015574A (ja) * | 2003-06-24 | 2005-01-20 | Asahi Kasei Chemicals Corp | 樹脂製配管 |
EP2199328A1 (en) * | 2008-12-22 | 2010-06-23 | Borealis AG | Polyolefin composition for water pipes with improved chlorine resistance |
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2007
- 2007-05-28 JP JP2007140644A patent/JP2008291183A/ja active Pending
-
2008
- 2008-05-22 US US12/595,670 patent/US20100136272A1/en not_active Abandoned
- 2008-05-22 EP EP08764816A patent/EP2154200A4/en not_active Withdrawn
- 2008-05-22 WO PCT/JP2008/059847 patent/WO2008146862A1/ja active Search and Examination
- 2008-05-22 KR KR1020097024211A patent/KR20100017186A/ko not_active Application Discontinuation
- 2008-05-22 CN CN200880014690A patent/CN101679742A/zh active Pending
- 2008-05-26 TW TW097119345A patent/TW200904897A/zh unknown
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EP0196407A2 (de) | 1985-03-04 | 1986-10-08 | Hüls Aktiengesellschaft | Verfahren zur Herstellung eines festen Verbundes zwischen Formmassen auf Basis von Polyphenylenethern einerseits und Doppelbindungen enthaltenden, mit Schwefel vulkanisierbaren Kautschuken andererseits |
EP0201874A2 (de) | 1985-05-14 | 1986-11-20 | BASF Aktiengesellschaft | Thermoplastische Formmassen |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021073340A (ja) * | 2015-10-16 | 2021-05-13 | 株式会社ブリヂストン | 多元共重合体、ゴム組成物、架橋ゴム組成物、ゴム製品、及びタイヤ |
JP7311091B2 (ja) | 2015-10-16 | 2023-07-19 | 株式会社ブリヂストン | 多元共重合体、ゴム組成物、架橋ゴム組成物、ゴム製品、及びタイヤ |
Also Published As
Publication number | Publication date |
---|---|
CN101679742A (zh) | 2010-03-24 |
TW200904897A (en) | 2009-02-01 |
US20100136272A1 (en) | 2010-06-03 |
JP2008291183A (ja) | 2008-12-04 |
EP2154200A1 (en) | 2010-02-17 |
EP2154200A4 (en) | 2010-07-14 |
KR20100017186A (ko) | 2010-02-16 |
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