JP4072168B2 - Anti-vibration member using thermoplastic elastomer composition - Google Patents

Description

  The present invention is a thermoplastic elastomer composition which is rich in flexibility and rubber elasticity, excellent in mechanical strength at high temperatures, flex crack resistance, and wear resistance, and can be used particularly for audio equipment, information equipment, video equipment and the like. It is related with the vibration proof member which consists of.

Conventionally, vulcanized rubbers such as silicone rubber, butyl rubber, EPDM rubber and the like have been widely used as materials for vibration-proof members used in various industrial equipment, consumer equipment, automobiles and the like. Examples of using styrene thermoplastic elastomers and olefin thermoplastic elastomers mainly composed of hydrogenated block copolymers for applications that require relatively little heat resistance, for the purpose of recent environmental measures and cost reduction. Also came to be seen a lot.
However, since the conventional thermoplastic elastomer has insufficient heat resistance, for example, in recent multifunctional audio equipment mounted on automobiles with high density filling of electronic components, internal heat generation and heat storage are required. The styrene-based thermoplastic elastomers and olefin-based thermoplastic elastomers failed to withstand long-term vibration stress and were damaged.
Therefore, a styrene-based thermoplastic elastomer composition containing a polyphenylene ether resin has been proposed for the purpose of improving mechanical strength and compression set at high temperatures. (Patent Documents 1 and 2). However, even in such a composition, it cannot be said that the composition can sufficiently withstand long-term vibration, and a problem that the vibration-proofing property is lowered has occurred. In addition, it is also known to use a composition in which a rubber and further a softening agent are blended with a styrene elastomer as a vibration-damping material (Patent Document 3), but the composition disclosed here is hot and intense. It is difficult to obtain a vibration-proof material that can withstand long-term vibration and impact.
Japanese Patent Laid-Open No. 62-25149 JP-A-9-227760 JP 7-292210 A

  The present invention has been made to solve the shortage of the above prior art, and an object thereof is to obtain a vibration isolating member that can withstand high temperature and intense long-term vibration and impact.

The above object is achieved, (a)) styrene block - conjugated diene block - the ratio of the styrene block portion composed of styrene block is from 5 to 50 wt%, and an ethylene-styrene-90% or more is hydrogenated conjugated diene portion 100 parts by weight of a block copolymer having a structure of an ethylene / propylene / styrene type triblock copolymer and having a solution viscosity of 90 to 300 mPa · s measured in a 3.5 wt% toluene solution at 30 ° C. On the other hand, (b) a vibration isolating member comprising a thermoplastic elastomer composition containing 50 to 300 parts by weight of a softening agent and (c) 2 to 100 parts by weight of a propylene-based resin,
Or (a) styrene- ethylene-ethylene-propylene comprising a styrene block-conjugated diene block- styrene block, wherein the ratio of the styrene block portion is 5 to 50% by weight, and 90% or more of the conjugated diene portion is hydrogenated -With respect to 100 parts by weight of a block copolymer having a structure of a styrene type triblock copolymer and having a solution viscosity measured in a 3.5 wt% toluene solution at 30 ° C in the range of 90 to 300 mPa · s, ( b) softener b 50-300 parts by weight, (c) 2-100 parts by weight of propylene-based resin and (d) general formula

Wherein R ₁ , R ₂ , R ₃ , and R ₄ each represent a substituent selected from the group consisting of hydrogen, halogen, and a hydrocarbon group, and may be the same or different from each other. And a thermoplastic elastomer composition containing 5 to 200 parts by weight of a polyphenylene ether resin having a reduced viscosity measured at 30 ° C. in a 0.5 g / dl chloroform solution in the range of 0.05 to 0.14. This is achieved by providing an anti-vibration member.

  According to the present invention, it is possible to obtain a vibration isolating member that can withstand high-temperature and intense long-term vibration and impact while satisfying the vibration isolating performance.

In the present invention, it is important to use the thermoplastic elastomer composition described above, and each component of the thermoplastic elastomer composition will be described below.
Component (a) Hydrogenated block copolymer The aromatic vinyl block of component (a) is, for example, styrene, α-methylstyrene, o, m or p-methylstyrene, 1,3-dimethylstyrene, vinylnaphthalene, vinyl. Anthracene etc. are mentioned. Among these, styrene and α-methylstyrene are preferable. A vinyl aromatic compound may be used independently and may use 2 or more types together. Examples of the conjugated diene compound of the conjugated diene block include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 1,3-hexadiene, and the like. Among these, isoprene, 1,3-butadiene or a mixture thereof is preferable. A conjugated diene compound may be used independently and may use 2 or more types together. The microstructure of the conjugated diene block in the hydrogenated block copolymer is not particularly limited. For example, when the conjugated diene block is a block made of polyisoprene, the 1,4 bond amount is desirably 70% or more. Further, when the conjugated diene block is a block made of polybutadiene, the 1,4 bond amount is desirably 40% to 80%. The content of vinyl aromatic compound in the hydrogenated block copolymer is 5 to 50% by weight. If the content of the vinyl aromatic compound deviates from this range, it is not preferable because sufficient rubber elasticity cannot be imparted to the thermoplastic elastomer composition mainly composed of the block copolymer. In addition, it is extremely important that the hydrogenated block copolymer has a solution viscosity measured in a 3.5 wt% toluene solution at 30 ° C. in the range of 90 to 300 mPa · s, particularly in a high temperature environment of 80 ° C. or higher. This has the effect of improving the tensile strength, tear strength, and bending fatigue resistance of the steel. When the solution viscosity is smaller than the above range, the tensile strength, tear strength, and bending fatigue resistance under a high temperature environment become insufficient, which is not preferable. If it is larger than the above range, the moldability becomes insufficient, which is not preferable. A more preferable range of the solution viscosity is 100 to 280 mPa · s. Also, at least 70% of the diene portion of the conjugated diene compound must be hydrogenated. Preferably it is 90% or more. If the amount of hydrogen added is less than 70%, the mechanical strength and weather resistance are inferior.
Therefore, the hydrogenated block copolymer preferably used in the present invention is 90%
Styrene-ethylene / propylene / styrene type triblock copolymer, styrene / ethylene / butylene / styrene type triblock copolymer, styrene / ethylene / ethylene / propylene / styrene type triblock copolymer obtained by hydrogenation above Among them, a styrene-ethylene / ethylene / propylene / styrene type triblock copolymer is most preferable.

Component (b) Examples of the softening agent include process oils such as paraffinic, naphthenic, and aromatic oils, liquid paraffin, and the like, and paraffinic and naphthenic process oils are particularly preferable. These are used alone or in combination of two or more. The weight average molecular weight of the oil is preferably 300 to 2000. Within this range, there is very little oil bleeding in the molded product. The amount of component (b) is 50 to 300 parts by weight, preferably 70 to 220 parts by weight, based on 100 parts by weight of component (a). If it is less than 50 parts by weight, the flexibility is inferior, and if it exceeds 300 parts by weight, mechanical strength and wear resistance are remarkably lowered.

Component (c) Examples of the propylene-based resin include polypropylene or a copolymer mainly composed of propylene, and a copolymer of homotype polypropylene, block type of propylene and other small amount of α-olefin, or random type of copolymer. One type or two or more types selected from coalescence are preferably used. Of these, homo-type polypropylene resin is preferred. (C) The compounding quantity of a component is 2-100 weight part with respect to 100 weight part of (a) component, Preferably it is 2-50 weight part. If it is less than 2 parts by weight, the moldability is deteriorated and the mechanical strength and wear resistance are remarkably lowered. If it exceeds 100 parts by weight, the flexibility is inferior.

Component (d) The polyphenylene ether resin has the effect of improving the wear resistance and compression set in the high temperature environment of the resulting composition, and when used in addition to the above (a), (b), (c) Furthermore, long-term durability can be improved. As a polyphenylene ether resin, a molecular chain bond unit is a homopolymer or copolymer having a bond unit represented by the general formula [Chemical Formula 1], and is measured at 30 ° C. in a 0.5 g / dl chloroform solution. Those having a reduced viscosity in the range of 0.05 to 0.14 are used, more preferably those in the range of 0.08 to 0.14. Known polyphenylene ether resins can be used. For example, poly (2,6-dimethyl-1,4-phenylene) ether, poly (2-methyl-6ethyl-1,4-phenylene) ether, poly (2,6-diphenyl-1,4-phenylene) ether Poly (2-methyl-6phenyl-1,4-phenylene) ether, poly (2,6-dichloro-1,4-phenylene) ether, etc., and 2,6-dimethylphenol and other phenols Examples thereof include polyphenylene ether copolymers such as copolymers with (for example, 2,3,6-trimethylphenol and 2-methyl-6-butylphenol). Among them, poly (2,6-dimethyl-1,4-phenylene) ether, a copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol is preferable, and poly (2,6-dimethyl- 1,4-phenylene) ether is preferred. (D) As for the compounding quantity of a component, 5-200 weight part is suitable with respect to 100 weight part of (a) component. If it is less than 5 parts by weight, the effect of adding the component (d) does not appear, and if it exceeds 200 parts by weight, the flexibility is impaired and the compression set is deteriorated.

  In addition to the above components, the thermoplastic elastomer composition used in the present invention is made of polyethylene, styrenic resin, or calcium carbonate, talc, carbon black for the purpose of improving or increasing the weather resistance depending on applications. Inorganic fillers such as titanium oxide, silica, clay, barium sulfate and magnesium carbonate can be mixed. Further, inorganic or organic fibrous materials such as glass fibers and carbon fibers can be mixed. In addition, it is also possible to contain various anti-blocking agents, heat stabilizers, antioxidants, light stabilizers, ultraviolet absorbers, lubricants, crystal nucleating agents, foaming agents, colorants and the like. Here, as the antioxidant, for example, 2,6-ditert-butyl-p-cresol, 2,6-ditert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, 4,4′- Dihydroxydiphenyl, tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, tetrakis [methylene-3- (3,5-ditert-butyl-4-hydroxyphenyl) propionate] methane, 3,9 Bis {2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl} -2,4,8,10-tetraoxaspiro-5,5 -Phenolic antioxidants such as undecane, phosphite antioxidants, thioether antioxidants, and the like. Of these, phenolic antioxidants and phosphite antioxidants are particularly preferred. The upper limit of the antioxidant is 3.0 parts by weight, preferably 1.0 part by weight, based on 100 parts by weight of the total of the components (a) to (c) of the present invention.

  If necessary, the thermoplastic elastomer composition used in the present invention can be crosslinked in the presence of a peroxide and a crosslinking aid. Examples of the peroxide include dicumyl peroxide, ditert-butyl peroxide, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-2,5-di ( tert-butylperoxy) hexyne-3,1,3-bis (tert-butylperoxyisopropyl) benzene, 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane, n-butyl -4,4-bis (tert-butylperoxy) valerate, benzoyl peroxide, p-chlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, tert-butylperoxybenzoate, tert-butylperoxyisopropyl carbonate, Diacetyl peroxide, lauroyl peroxide, ter Examples thereof include t-butyl cumyl peroxide and hydrogen peroxide. Examples of the crosslinking aid include polyfunctionality such as divinylbenzene, triallyl cyanurate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and allyl methacrylate. Multifunctional vinyl monomers such as methacrylate monomers, vinyl butyrate or vinyl stearate can be included.

  The thermoplastic elastomer composition used in the present invention is preferably JIS A type and adjusted to have a hardness of 10 to 80 degrees. Furthermore, the said objective is achieved more suitably by adjusting to 10-50 degree | times.

  As a method for producing the thermoplastic elastomer composition used in the present invention, a method used for producing a normal resin composition or a rubber composition can be employed. A single screw extruder, a twin screw extruder, a Banbury mixer, It can manufacture by compounding each component uniformly using melt kneaders, such as a heating roll and various kneaders. The set temperature of the processing machine can be arbitrarily selected from 150 ° C. to 300 ° C., and the manufacturing method is not limited.

  The vibration-proof member of the present invention can be obtained by subjecting the thermoplastic elastomer composition to a conventionally known method such as hot pressing, injection molding, extrusion molding, or calendar molding. Furthermore, you may use the shaping | molding method by two processes which process the detail by compression molding by the sheet | seat and film which carried out extrusion molding or the calendar molding. It is also possible to improve the vibration proofing and damping of the vibration proof member by enclosing a viscous fluid such as silicone oil inside the vibration proof member. The thermoplastic elastomer composition of the present invention and a hard resin such as a propylene-based resin can be integrally formed by composite injection molding using two kinds of materials such as two-color molding and insert molding, or multilayer extrusion molding. The shape of the vibration-proof member thus obtained is arbitrary, and for example, a disk shape and a cylindrical body are preferable examples.

In order to describe the present invention more specifically and in detail, examples are shown below, but the present invention is not limited to these examples.
In addition, the performance evaluation of the vibration-proof member shape | molded using the thermoplastic elastomer composition was performed by the method shown below.

  Using a twin screw extruder (caliber 46 mm, L / D = 46), each component was mixed and melt-kneaded at 200 ° C. according to the formulation shown in Table 1 to obtain a pellet-shaped thermoplastic elastomer composition. . Using these thermoplastic elastomer compositions, a disk-shaped sheet having a thickness of 2 mm × φ120 and a cylindrical molded body having an outer diameter of 7.6 mm, an inner diameter of 6 mm, and a length of 16 mm are formed by an injection molding machine (200 ° C.). Each was prepared separately.

In Examples 1 to 6 and Comparative Examples 1 to 4 in Table 1, (a) component is 4 types of hydrogenated triblock copolymers, (b) component is mineral oil softener, and (c) component is propylene. As the resin and the component (d), the following were used for each of the polyphenylene ether resins.
Ingredient (a)
(A-1) Type: Styrene-ethylene / ethylene / propylene-styrene type triblock copolymer, Styrene content: 30 wt%, 3.5 wt% Solution viscosity measured at 30 ° C. in toluene solution: 280 mPa・ S (measured at Tokyo Keiki Co., Ltd. B-type viscometer B8L, No. 2 rotor, rotating at 60 rpm), hydrogenation rate: 98%, manufacturer: Kuraray Co., Ltd. (a-2) Type: Styrene Ethylene / ethylene / propylene-styrene type triblock copolymer, Styrene content: 30 wt%, 3.5 wt% Solution viscosity measured at 30 ° C. in toluene solution: 140 mPa · s (B type manufactured by Tokyo Keiki Co., Ltd.) Viscometer B8L, No. 2 rotor, measured at 60 rpm, hydrogenation rate: 98%, product name: Septon 4099, manufacturer name: Kuraray Co., Ltd. (a 3) Type: styrene-ethylene / ethylene / propylene-styrene type triblock copolymer, styrene content: 30 wt%, 3.5 wt% Solution viscosity measured at 30 ° C. in toluene solution: 100 mPa · s ( B-type viscometer B8L manufactured by Tokyo Keiki Co., Ltd., measured with a No. 2 rotor and a rotation speed of 60 rpm), hydrogenation rate: 98%, manufacturer name: Kuraray Co., Ltd. (a-4) Type: styrene-ethylene Propylene-styrene type triblock copolymer, styrene content: 30 wt%, solution viscosity measured at 30 ° C. in a 3.5 wt% toluene solution: 60 mPa · s (B-type viscometer manufactured by Tokyo Keiki Co., Ltd.) B8L, No. 2 rotor, measured at 60 rpm), hydrogenation rate: 98%, product name: Septon 4077, manufacturer name: Kuraray Co., Ltd.

Ingredient (b)
Product name: Diana Process Oil PW90, manufacturer: Idemitsu Petrochemical Co., Ltd., type: paraffinic oil, weight average molecular weight: 540
Ingredient (c)
Product name: Grand Polypro J106W, Manufacturer name: Grand Polymer Co., Ltd., Type: Homotype polypropylene

Ingredient (d)
Product name: Noryl SA120, Manufacturing company name: Nippon GE Plastics Co., Ltd., Reduced viscosity measured at 30 ° C. in 0.5 g / dl chloroform solution: 0.12

I) Hardness Using the thermoplastic elastomer composition shown in Table 1, the type A durometer hardness was measured by a disk sheet-like sheet produced by an injection molding machine as described above according to JIS K6253. The injection molding machine used was FE120 manufactured by Nissei Plastic Industries.

II) Vibration durability of cylindrical molded article A cylindrical molded body having an outer diameter of 7.6 mm, an inner diameter of 6 mm, and a length of 16 mm, which was produced by an injection molding machine as described above using the thermoplastic elastomer composition shown in Table 1. Three pieces are fitted into three protrusions of a metal plate (weight 200 g, with an outer diameter 7 mm and a height 4 mm protrusion at three locations), and the metal plate is attached to the table of the vibration device so that the cylindrical molded body becomes a foot (above-mentioned Fits and installs on the protrusions on the metal plate at three locations opposite to the protrusions of the outer diameter 7mm and height 4mm), and generates random waves, acceleration 30m / s ² , maximum displacement 20mm, and vibration frequency 5Hz. Given continuously. The atmospheric temperature was kept constant at 85 ° C. on the table of this vibration device. The vibration direction was two ways, the vertical method and the horizontal method, and the vibration durability time was measured separately. Stop the vibration device every 15 minutes to check the damage status of the cylindrical molded body. If even one of the three is damaged, stop the vibration test at that time, and calculate the accumulated time up to that time. It was. The results are shown in Table 1.

III) Anti-vibration performance and vibration durability of viscous fluid-filled damper Using the thermoplastic elastomer composition shown in Table 1, the viscous fluid-filled damper shown in FIG. 1 was prepared, and vibration damping performance and vibration durability were tested. . As shown in FIG. 1, the viscous fluid-filled damper has a configuration in which a viscous fluid 3 is sealed in a sealed container 2. The sealed container 2 includes a peripheral wall portion 4 and a lid body 7 made of a hard resin such as polypropylene, a flexible membrane portion 5 made of a thermoplastic elastomer (composition of the present invention) as a rubber-like elastic body, and a stirring cylinder portion 6. The Moreover, the stirring cylinder part 6 has a bottomed cylinder shape. Further, here, the viscous fluid 3 having a rotational viscosity of 1.3 m ² / s is used.
The test method for vibration damping performance is as follows. That is, a supported body 10 having a mass of 330 g, which is assumed to be a mechanical chassis of a disk-shaped recording medium, is suspended and supported by three coil springs 9 in a housing 8 as shown in FIG. The three shafts 11 were fixed so as to protrude downward, and the mounting shafts 11 were respectively inserted and held in the stirring cylinder portion 6 of the viscous fluid-filled damper. The viscous fluid-filled damper 1 was fixed to the bottom plate 12 of the casing serving as a support, and the bottom plate of the casing was fixed on the vibration table. Then, the casing 8 fixed to the vibration table is vibrated at a constant frequency of 9.8 m / s ² in the frequency range of 8 to 200 Hz, and the vibration transmissibility between the casing and the supported body is measured. The vibration damping performance was evaluated. The resonance magnification was obtained by measuring the acceleration a _{2 of the} supported body with respect to the acceleration a ₁ of the housing at the resonance frequency and converting it by a relational expression of 20 log (a ₁ / a ₂ ).
The vibration durability test method was performed by applying random vibration according to the vibration profile shown in FIG. 3 and maintaining the environmental temperature at 85 ° C. using the same apparatus as the vibration damping performance test described above. In addition, the vibration durability test is performed in the vertical and horizontal directions, and the time until the viscous fluid leaks to the outside after the film made of the thermoplastic elastomer of the viscous fluid-filled damper is broken is measured at intervals of 50 minutes. did.
The results are shown in Table 1.

Examples 1, 2, 5
The flexibility of the thermoplastic elastomer composition was good, and the vibration durability time of the cylindrical molded product greatly exceeded the target of 120 minutes, and the durability was excellent. Furthermore, the vibration-proof performance of the viscous fluid-filled damper was good, and the vibration durability of the viscous fluid-filled damper was confirmed to be about 10 times as long as that of a conventional thermoplastic elastomer.

Example 3
The flexibility of the thermoplastic elastomer composition was good, and the vibration durability time of the cylindrical molded product greatly exceeded the target of 120 minutes, and the durability was excellent. Furthermore, the vibration-proof performance of the viscous fluid-filled damper was good, and the vibration durability of the viscous fluid-filled damper was confirmed to be about 10 times as long as that of a conventional thermoplastic elastomer.

Examples 4 and 6
The flexibility of the thermoplastic elastomer composition was good, and the vibration durability time of the cylindrical molded product greatly exceeded the target of 120 minutes, and the durability was excellent. Further, the vibration durability time was further increased from that in Examples 1 and 3, and a significant improvement in durability was observed. Furthermore, the vibration-proof performance of the viscous fluid-filled damper was also good, and the vibration durability of the viscous fluid-filled damper was confirmed to be 12 times longer than that of a conventional thermoplastic elastomer.

Comparative Examples 1 and 3
Although the flexibility of the thermoplastic elastomer composition was good, the vibration durability time of the cylindrical molded product was less than the targeted 120 minutes, and the durability was poor. In addition, the viscous fluid-filled damper had good vibration-proof performance, but the durability was inferior as with the cylindrical molded product.

Comparative Examples 2 and 4
Although the thermoplastic elastomer composition has good flexibility and improved durability compared with Comparative Examples 1 and 3, it is less than 120 minutes, which was the target in the horizontal vibration durability test, and has sufficient durability. I couldn't say that. In addition, the viscous fluid-filled damper had good vibration-proof performance, but the durability was inferior as with the cylindrical molded product.

  The vibration-proof member using the thermoplastic elastomer composition which is rich in flexibility and rubber elasticity obtained in the present invention and has excellent mechanical strength at high temperature, flex crack resistance, and wear resistance is particularly suitable for acoustic equipment and information equipment. It can be used as an application for vibration isolation in video equipment and the like. It is possible to provide a vibration-proof member that can withstand high-temperature and intense long-term vibrations and impacts that cannot be achieved by conventional thermoplastic elastomers while satisfying the purpose of use of the thermoplastic elastomer for reducing environmental burden and manufacturing cost. In particular, the vibration isolator of the present invention causes sound skipping, image distortion, etc. when the vibration of the automobile is transmitted to the optical disc apparatus as it is when an optical disc apparatus such as a compact disc (CD) player or DVD player is mounted on the automobile. For this reason, in order to prevent this, the optical disk device is preferably used as a member for supporting vibration isolation.

It is sectional drawing of a viscous fluid enclosure damper. It is sectional drawing of the testing apparatus of vibration damping performance. It is a figure which shows a random vibration excitation profile.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Viscous fluid enclosure damper 2 Airtight container 3 Viscous fluid 4 Peripheral wall part 5 Flexible film part 6 Stirring cylinder part 7 Lid body 8 Case 9 Coil spring 10 Supported body 11 Shaft 12 Bottom plate

Claims (2)

(A) Styrene- ethylene-ethylene-propylene-styrene comprising a styrene block-conjugated diene block- styrene block, wherein the ratio of the styrene block portion is 5 to 50% by weight, and 90% or more of the conjugated diene portion is hydrogenated With respect to 100 parts by weight of a block copolymer having a structure of a type triblock copolymer and having a solution viscosity measured at 30 ° C. in a 3.5 wt% toluene solution in the range of 90 to 300 mPa · s, (b) An antivibration member comprising a thermoplastic elastomer composition containing 50 to 300 parts by weight of a softening agent and (c) 2 to 100 parts by weight of a propylene-based resin. (A) Styrene- ethylene-ethylene-propylene-styrene comprising a styrene block-conjugated diene block- styrene block, wherein the ratio of the styrene block portion is 5 to 50% by weight, and 90% or more of the conjugated diene portion is hydrogenated 100 parts by weight of a block copolymer having a structure of a type triblock copolymer and having a solution viscosity measured at 30 ° C. in a 3.5 wt% toluene solution in the range of 90 to 300 mPa · s, (b) 50-300 parts by weight of a softener, (c) 2-100 parts by weight of a propylene-based resin, and (d) a general formula

Wherein R ₁ , R ₂ , R ₃ , and R ₄ each represent a substituent selected from the group consisting of a hydrogen atom, a halogen atom, and a hydrocarbon group, and may be the same or different from each other. Thermoplastic elastomer composition containing 5 to 200 parts by weight of a polyphenylene ether resin containing a bond unit and having a reduced viscosity measured in a 0.5 g / dl chloroform solution at 30 ° C. in the range of 0.05 to 0.14 Anti-vibration member made of material.

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