JP6132939B2 - Anti-vibration material and anti-vibration member - Google Patents

Description

  The present invention relates to a vibration isolating material and a vibration isolating member.

  Anti-vibration materials (also referred to as vibration-damping materials) are used to suppress vibrations generated from vibrating bodies, such as automobiles, trains, aircraft, marine transport equipment, OA equipment, home appliances and other electrical products, and audio products. It is widely used for members such as audio equipment, machine tools, industrial machines and the like.

  Conventionally, various vibration-proof materials have been developed. For example, Japanese Patent Application Laid-Open No. 2005-336460 (Patent Document 1) discloses a vibration-proof material composed of a thermoplastic elastomer composition containing a specific styrene-based block copolymer. A member is disclosed, and Japanese Patent Application Laid-Open No. 2000-198974 (Patent Document 2), Japanese Patent Application Laid-Open No. 2006-206628 (Patent Document 3) and the like also disclose a vibration isolating material made of a thermoplastic elastomer composition. .

  JP 2003-64227 A (Patent Document 4) discloses an EPDM composition comprising an oil-extended EPDM, an ethylene / α-olefin copolymer, and an ester plasticizer as a vibration-proof material.

  Further, JP-A-2007-255687 (Patent Document 5) is obtained by copolymerizing at least two olefins selected from ethylene, propylene and α-olefins having 4 to 20 carbon atoms, and has a molecular weight distribution of 1. An adhesive vibration-damping sheet including an adhesive layer containing an amorphous olefin polymer of ~ 3 is disclosed. Examples of the combination of olefins include a combination of propylene and 4-methyl-1-pentene. The propylene unit content is preferably 50 mol% or more, and the intrinsic viscosity [η] of the amorphous olefin polymer (η) ( (Measured in tetralin at 135 ° C.) is preferably 0.1 dl / g or more and 10 dl / g or less, and it is described that the amorphous olefin polymer is produced using a metallocene catalyst. Range, paragraphs [0008] to [0010], [0021], [0023], [0025], etc.).

  Further, International Publication No. 2005/121192 (Patent Document 6) discloses a 4-methyl-1-pentene copolymer (4-methyl-1-pentene elastomer) and a composition containing the same. ing.

JP 2005-336460 A JP 2000-198974 A JP 2006-206628 A JP 2003-64227 A JP 2007-255687 A International Publication No. 2005/121192 Pamphlet

  However, the vibration-proof material made of a styrene-based thermoplastic elastomer composition (Patent Document 1) has a high density and has problems in lightness and vibration-proof properties, and the vibration-proof material made of the thermoplastic elastomer composition of Patent Documents 2 and 3. The vibration material also has a problem in terms of chemical resistance and hydrolysis resistance of the polyester and polyamide portions which are part of the composition.

  Moreover, although the vibration-proof material (patent document 4) which consists of an EPDM composition is a softness | flexibility, the tan-delta value in room temperature is around 0.3 and its vibration-proof property was not enough. In addition, since it contains an ester plasticizer, there is a problem of chemical resistance and hydrolysis resistance.

Furthermore, the pressure-sensitive vibration damping sheet using the amorphous olefin polymer (Patent Document 5) has a large impact resilience and is not sufficiently vibration-proof.
The object of the present invention is to solve the problems in the prior art as described above, and is a vibration-proof material made of a thermoplastic resin that is lightweight and excellent in vibration-proofing properties, and also excellent in chemical resistance and hydrolysis resistance. And it aims at providing the vibration isolator which has such a characteristic.

The vibration isolator of the present invention contains at least a 4-methyl-1-pentene / α-olefin copolymer (A) satisfying the following requirements (a), (b), (c) and (d). Features;
(A) From a structural unit (i) derived from 15 to 75 mol% of 4-methyl-1-pentene and 25 to 85 mol% of an α-olefin (excluding 4-methyl-1-pentene). Derived structural unit (ii) (however, the sum of the proportion of structural unit (i) and the proportion of structural unit (ii) is 100 mol%),
(B) The intrinsic viscosity [η] measured at 135 ° C. in decalin is in the range of 0.1 to 5.0 dL / g.
(C) The ratio (molecular weight distribution; Mw / Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5. It is in.
(D) The density is in the range of 880 to 810 kg / m ³ .

  The vibration isolator contains the 4-methyl-1-pentene / α-olefin copolymer (A) and a thermoplastic resin (excluding the copolymer (A)) or rubber (B1). It may be a resin composition.

The α-olefin is preferably propylene.
The vibration isolating member of the present invention is characterized by comprising at least a part of the vibration isolating material of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the anti-vibration material excellent in the softness | flexibility and anti-vibration property which was lightweight, and the anti-vibration member which has such a characteristic are provided.
Moreover, since the vibration-proof material and vibration-proof member of the present invention contain the 4-methyl-1-pentene / α-olefin copolymer (A), which is a polyolefin, it is excellent in chemical resistance and hydrolysis resistance. Yes.

Hereinafter, the vibration isolator and the vibration isolator of the present invention will be described in more detail.
[Vibration isolator]
The vibration isolator of the present invention is characterized by containing at least a 4-methyl-1-pentene / α-olefin copolymer (A) having specific physical properties.

<4-Methyl-1-pentene / α-olefin copolymer (A)>
The 4-methyl-1-pentene / α-olefin copolymer (A) satisfies the following requirements (a), (b), (c) and (d).

Requirement (a);
The 4-methyl-1-pentene / α-olefin copolymer (A) is derived from 15 to 75 mol% of 4-methyl-1-pentene (excluding 4-methyl-1-pentene). The structural unit (i) and the structural unit (ii) derived from 25 to 85 mol% α-olefin (however, the total of the proportion of the structural unit (i) and the proportion of the structural unit (ii) is 100 mol%. There is.)

  The proportion of the structural unit (i) derived from 4-methyl-1-pentene is preferably 20 to 75 mol%, more preferably 20 to 65 mol%, still more preferably 20 to 33 mol%. Particularly preferred is 20 to 32 mol%.

  The proportion of the structural unit (ii) derived from the α-olefin is preferably 25 to 80 mol%, more preferably 35 to 80 mol%, still more preferably 67 to 80 mol%, and particularly Preferably it is 68-80 mol%.

If the proportion of the structural unit (i) is less than 15 mol%, the flexibility, lightness, and vibration resistance are impaired. If the proportion is more than 75 mol%, the vibration resistance, flexibility, and lightness are exceeded. Sexuality is impaired.
Examples of the α-olefin that leads to the structural unit (ii) include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-undecene, 1-dodecene, and 1-tetradecene. , 1-hexadecene, 1-octadecene, 1-eicosene and the like, a linear α-olefin having 2 to 20 carbon atoms, preferably 2 to 15 carbon atoms, more preferably 2 to 10 carbon atoms, 3- Methyl-1-butene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4,4-dimethyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, Examples thereof include branched α-olefins having 5 to 20 carbon atoms, preferably 5 to 15 carbon atoms, such as 4-ethyl-1-hexene and 3-ethyl-1-hexene. Among these, ethylene, propylene, 1-butene, 1-pentene, 1-hexene and 1-octene are preferable, and propylene is particularly preferable.

  The 4-methyl-1-pentene / α-olefin copolymer (A) is derived from other monomers as long as it is a small amount (eg, 10 mol% or less) that does not impair the object of the present invention. A structural unit may be included. Specific examples of other monomers include ethylene, 1-pentene / α-olefin copolymer (A) in the case of 4-methyl-1-pentene / propylene copolymer. Butene, 1-hexene, 1-octene, 5-methyl-2-norbornene, tetracyclododecene, 5-vinyl-2-norbornene, 5-ethylidene-2-norbornene and the like are preferable.

Requirement (b);
The intrinsic viscosity [η] of the 4-methyl-1-pentene / α-olefin copolymer (A) measured at 135 ° C. in decalin is in the range of 0.1 to 5.0 dL / g. The details of the measurement conditions and the like are as described in the column of Examples described later.

The intrinsic viscosity [η] is preferably 0.5 to 4.0 (dL / g), more preferably 0.5 to 3.5 (dL / g).
As described later, when hydrogen is used together during polymerization, the molecular weight can be controlled, and the intrinsic viscosity [η] can be adjusted by freely obtaining from a low molecular weight body to a high molecular weight body.
If the intrinsic viscosity [η] is less than 0.1 dL / g and more than 5.0 dL / g, moldability is impaired.

Requirement (c);
Ratio of weight average molecular weight (Mw) and number average molecular weight (Mn) measured by gel permeation chromatography (GPC) of the 4-methyl-1-pentene / α-olefin copolymer (A) ( The molecular weight distribution (Mw / Mn) is in the range of 1.0 to 3.5. The details of the measurement conditions and the like are as described in the column of Examples described later.

The Mw / Mn is preferably 1.2 to 3.0, more preferably 1.5 to 2.5.
If the Mw / Mn is more than 3.5, the influence of the composition distribution and the low molecular weight polymer is concerned and the vibration damping property is poor. In addition, it is disadvantageous in expressing the mechanical properties and moldability of the polymer, causing stickiness during molding and causing problems.

  If the catalyst mentioned later is used, the said copolymer (A) which satisfy | fills a requirement (c) within the range of intrinsic viscosity [(eta)] shown by the said requirement (b) can be obtained. The values of Mw / Mn and Mw are values measured by the method employed in the examples described later.

  The weight average molecular weight (Mw) of the 4-methyl-1-pentene / α-olefin copolymer (A) measured by gel permeation chromatography (GPC) is preferably 500 in terms of polystyrene. To 10,000,000, more preferably 1,000 to 5,000,000, and still more preferably 1,000 to 2,500,000.

Requirement (d);
The density (measured by ASTM D 1505) of the 4-methyl-1-pentene / α-olefin copolymer (A) is in the range of 880 to 810 kg / m ³ . The details of the measurement conditions and the like are as described in the column of Examples described later.

The 4-methyl-1-pentene / α-olefin copolymer (A) is preferably 870 to 810 kg / m ³ , more preferably 860 to 820 kg / m ³ , and still more preferably 855 to 830 kg / m ³ . .

  The density can be changed by the comonomer composition ratio of the 4-methyl-1-pentene / α-olefin copolymer (A), and the copolymer (A) within the above range produces a lightweight vibration-proof member. This is advantageous.

  Further, the 4-methyl-1-pentene / α-olefin copolymer (A) preferably satisfies the following requirements (e) and (f). In addition, the vibration-proof material of this invention containing the copolymer (A) which satisfy | fills requirements (e) and (f) is also called "vibration-proof material (X1)."

Requirement (e);
Measurement of dynamic viscoelasticity of the 4-methyl-1-pentene / α-olefin copolymer (A) at a temperature range of −40 ° C. to 150 ° C. at a frequency of 10 rad / s (details of measurement conditions, etc. The maximum value of the loss tangent tan δ (hereinafter also referred to as “tan δ peak value”) obtained by performing the following is preferably 1.0 to 5.0, and more preferably. Is in the range of 1.5 to 5.0, more preferably 2.0 to 4.0.

The temperature at which the value of tan δ becomes maximum is preferably −10 ° C. to 40 ° C., more preferably 0 ° C. to 40 ° C., and further preferably 5 ° C. to 40 ° C.
The maximum value of tan δ can be controlled by the comonomer composition ratio of the 4-methyl-1-pentene / α-olefin copolymer (A), for example, 4-methyl-1-pentene in the copolymer (A). The requirement (e) can be satisfied by setting the content to 20 to 75 mol%.

Requirement (f);
Measurement of dynamic viscoelasticity of the 4-methyl-1-pentene / α-olefin copolymer (A) at a frequency of 10 rad / s at 20 ° C. (Details of measurement conditions and the like are described in the Examples section described later. The value of the loss tangent tan δ obtained by performing the above is preferably 0.5 to 5.0, more preferably 0.5 to 4.0, and still more preferably 0.5 to 3.5. Is in range.

For example, the requirement (f) can be satisfied by setting the 4-methyl-1-pentene content in the copolymer (A) to 20 to 75 mol%.
When the 4-methyl-1-pentene / α-olefin copolymer (A) satisfies the requirements (e) and (f), the vibration-proof material is excellent in flexibility, light weight, and vibration-proof properties.

Other characteristics of copolymer (A);
The amount of the 4-methyl-1-pentene / α-olefin copolymer (A) extracted with methyl acetate is preferably 0 to 1.5% by weight, more preferably 0 to 1.0% by weight, and still more preferably. Is 0 to 0.8% by weight, particularly preferably 0 to 0.5% by weight. The amount of methyl acetate extracted becomes an index of stickiness during molding. When this value is large, the obtained polymer has a large composition distribution and contains a low molecular weight polymer, causing problems during molding. When the methyl acetate extraction amount is within the above range, there is no problem due to stickiness during molding. Further, by using a catalyst described later, a copolymer (A) having a low stereoregular atactic component can be synthesized, and by forming a vibration-proof material containing at least the obtained copolymer (A), stickiness is obtained. An anti-vibration member having no vibration is obtained.

The rebound resilience at 40 ° C. defined by the following formula of the 4-methyl-1-pentene / α-olefin copolymer (A) is 0 to 25%, more preferably 0 to 20%, still more preferably. It is in the range of 0 to 15%.
Rebound resilience (%) = L (mm) / 460 × 100
[L is a height of 460 mm at 40 ° C. according to JIS K6400 on a 6 mm thick press sheet prepared from the 4-methyl-1-pentene / α-olefin copolymer (A). The rebound height of a 16.310 g hard sphere dropped from ]

  The rebound resilience can be controlled by the comonomer composition of the 4-methyl-1-pentene / α-olefin copolymer (A). For example, the 4-methyl-1-pentene content is 20 to 72 mol%. Thus, the rebound resilience can be within the above range.

  The Shore A hardness (measured in the state of a press sheet having a thickness of 3 mm according to JIS K6253) of the 4-methyl-1-pentene / α-olefin copolymer (A) after 15 seconds from the start of the contact with the needle. The value is preferably 5 to 90, more preferably 10 to 80, still more preferably 15 to 70, and particularly preferably 15 to 65. The details of the method for producing the press sheet and the like are as described in the Examples section described later.

  The value of Shore A hardness can be controlled by the comonomer composition of the copolymer (A). For example, the 4-methyl-1-pentene content in the copolymer (A) is 20 to 75 mol%. Thus, a copolymer (A) having these values in the above range can be obtained.

<Manufacturing method>
Next, a method for producing the 4-methyl-1-pentene / α-olefin copolymer (A) will be described.

  For the production of the 4-methyl-1-pentene / α-olefin copolymer (A), a conventionally known catalyst, for example, a magnesium-supported titanium catalyst, WO 01/53369, WO 01/27124. The metallocene catalysts described in the pamphlet of JP-A No. 3-19396 or JP-A No. 02-41303 are preferably used, and more preferably the metallocene represented by the following general formula (1) or (2) An olefin polymerization catalyst containing a compound is preferably used.

（式中、Ｒ¹、Ｒ²、Ｒ³、Ｒ⁴、Ｒ⁵、Ｒ⁶、Ｒ⁷、Ｒ⁸、Ｒ⁹、Ｒ¹⁰、Ｒ¹¹、Ｒ¹²、Ｒ¹³およびＲ¹⁴は、水素、炭化水素基およびケイ素含有炭化水素基から選ばれ、それぞれ同一でも異なっていてもよく、Ｒ¹からＲ⁴までの隣接した置換基は互いに結合して環を形成してもよく、Ｒ⁵からＲ¹²までの隣接した置換基は互いに結合して環を形成してもよく、Ａは一部不飽和結合および／または芳香族環を含んでいてもよい炭素原子数２〜２０の２価の炭化水素基であり、ＡはＹと共に形成する環を含めて２つ以上の環構造を含んでいてもよく、
Ｍは周期表第４族から選ばれた金属であり、
Ｙは炭素またはケイ素であり、
Ｑはハロゲン、炭化水素基、およびアニオン配位子または孤立電子対で配位可能な中性配位子から同一のまたは異なる組合せで選ばれ、
ｊは１〜４の整数である。）

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ , R ¹² , R ¹³ and R ¹⁴ are hydrogen, carbonized, Selected from a hydrogen group and a silicon-containing hydrocarbon group, which may be the same or different, and adjacent substituents from R ¹ to R ⁴ may be bonded to each other to form a ring; R ⁵ to R ¹² Up to adjacent substituents may be bonded to each other to form a ring, and A is a divalent hydrocarbon having 2 to 20 carbon atoms which may partially contain an unsaturated bond and / or an aromatic ring And A may contain two or more ring structures including the ring formed with Y,
M is a metal selected from Group 4 of the periodic table,
Y is carbon or silicon;
Q is selected from the same or different combinations from halogen, hydrocarbon groups, and anionic ligands or neutral ligands capable of coordinating with lone pairs;
j is an integer of 1-4. )

R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ , R ¹² , R ^{13 in the} general formula (1) or (2) R ¹⁴ is selected from hydrogen, a hydrocarbon group and a silicon-containing hydrocarbon group, and may be the same or different.

  The hydrocarbon group is preferably an alkyl group having 1 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an alkylaryl group having 7 to 20 carbon atoms. Yes, it may contain one or more ring structures. Moreover, a part or all of hydrogen of the hydrocarbon group may be substituted with a functional group such as a hydroxyl group, an amino group, a halogen group, or a fluorine-containing hydrocarbon group. Specific examples of the hydrocarbon group include methyl, ethyl, n-propyl, isopropyl, 2-methylpropyl, 1,1-dimethylpropyl, 2,2-dimethylpropyl, 1,1-diethylpropyl, and 1-ethyl-1. -Methylpropyl, 1,1,2,2-tetramethylpropyl, sec-butyl, tert-butyl, 1,1-dimethylbutyl, 1,1,3-trimethylbutyl, neopentyl, cyclohexylmethyl, cyclohexyl, 1-methyl -1-cyclohexyl, 1-adamantyl, 2-adamantyl, 2-methyl-2-adamantyl, menthyl, norbornyl, benzyl, 2-phenylethyl, 1-tetrahydronaphthyl, 1-methyl-1-tetrahydronaphthyl, phenyl, biphenyl, Naphthyl, tolyl, chlorophenyl, chlorobipheny , Chloronaphthyl, and the like.

  The silicon-containing hydrocarbon group is preferably an alkylsilyl group or arylsilyl group having 1 to 4 silicon atoms and 3 to 20 carbon atoms, and specific examples thereof include trimethylsilyl, tert-butyldimethylsilyl, triphenylsilyl and the like. Is mentioned.

Adjacent substituents from R ⁵ to R ¹² on the fluorene ring may be bonded to each other to form a ring. Examples of such a substituted fluorenyl group include benzofluorenyl, dibenzofluorenyl, octahydrodibenzofluorenyl, octamethyloctahydrodibenzofluorenyl and the like.

The substituents R ⁵ to R ¹² on the fluorene ring are symmetrical from the viewpoint of synthesis, that is, R ⁵ = R ¹² , R ⁶ = R ¹¹ , R ⁷ = R ¹⁰ , and R ⁸ = R ^9. And the fluorene ring is more preferably unsubstituted fluorene, 3,6-disubstituted fluorene, 2,7-disubstituted fluorene or 2,3,6,7-tetrasubstituted fluorene. Wherein the 3-position on the fluorene ring, 6-position, 2-position, 7-position corresponds to the ^{R 7, R 10, R 6} , R 11 , respectively.

R ¹³ and R ^{14 in} the general formula (1) are selected from hydrogen and a hydrocarbon group, and may be the same or different. Specific examples of preferred hydrocarbon groups include the same as those described above.

Y is carbon or silicon. In the case of the general formula (1), R ¹³ and R ¹⁴ are bonded to Y to form a substituted methylene group or a substituted silylene group as a bridging part. Preferred examples include methylene, dimethylmethylene, diisopropylmethylene, methyl tert-butylmethylene, dicyclohexylmethylene, methylcyclohexylmethylene, methylphenylmethylene, fluoromethylphenylmethylene, chloromethylphenylmethylene, diphenylmethylene, dichlorophenylmethylene, difluorophenylmethylene. Methylnaphthylmethylene, dibiphenylmethylene, di-p-methylphenylmethylene, methyl-p-methylphenylmethylene, ethyl-p-methylphenylmethylene, dinaphthylmethylene or dimethylsilylene, diisopropylsilylene, methyl-tert-butylsilylene, dicyclohexyl Silylene, methylcyclohexylsilylene, methylphenylsilylene, fluoromethyl Enirushiriren, chloromethyl silylene, diphenyl silylene, mention may be made of di-p- methylphenyl silylene, methyl -p- methylphenyl silylene, ethyl -p- methylphenyl silylene, methyl naphthyl silylene, a dinaphthyl silylene like.

  In the case of the general formula (2), Y is bonded to a divalent hydrocarbon group A having 2 to 20 carbon atoms which may partially contain an unsaturated bond and / or an aromatic ring, and a cycloalkylidene group or It constitutes a cyclomethylenesilylene group and the like. Preferred examples include cyclopropylidene, cyclobutylidene, cyclopentylidene, cyclohexylidene, cycloheptylidene, bicyclo [3.3.1] nonylidene, norbornylidene, adamantylidene, tetrahydronaphthylidene, dihydroindanidene. Examples include lidene, cyclodimethylenesilylene, cyclotrimethylenesilylene, cyclotetramethylenesilylene, cyclopentamethylenesilylene, cyclohexamethylenesilylene, cycloheptamethylenesilylene, and the like.

M in the general formulas (1) and (2) is a metal selected from Group 4 of the periodic table, and examples of M include titanium, zirconium, and hafnium.
Q is selected from the same or different combinations from halogen, a hydrocarbon group having 1 to 20 carbon atoms, and an anionic ligand or a neutral ligand capable of coordinating with a lone electron pair. Specific examples of the halogen include fluorine, chlorine, bromine and iodine, and specific examples of the hydrocarbon group include the same as those described above. Specific examples of the anionic ligand include alkoxy groups such as methoxy, tert-butoxy and phenoxy, carboxylate groups such as acetate and benzoate, and sulfonate groups such as mesylate and tosylate. Specific examples of neutral ligands that can be coordinated by a lone pair include organophosphorus compounds such as trimethylphosphine, triethylphosphine, triphenylphosphine, diphenylmethylphosphine, and tetrahydrofuran, diethyl ether, dioxane, 1,2- And ethers such as dimethoxyethane. Among these, Q may be the same or different combinations, but at least one is preferably a halogen or an alkyl group.

  Specific examples of the metallocene compound in the present invention include compounds exemplified in WO 01/27124, WO 2006/025540, or WO 2007/308607. In particular, this does not limit the scope of the present invention.

When a metallocene compound is used in the production of the 4-methyl-1-pentene / α-olefin copolymer (A), the catalyst component is
(A) a metallocene compound (for example, a metallocene compound represented by the above general formula (1) or (2));
(B) (b-1) an organoaluminum oxy compound,
(B-2) a compound that reacts with the metallocene compound (A) to form an ion pair, and (b-3) at least one compound selected from organoaluminum compounds;
If necessary,
(C) It is comprised from a particulate carrier. As a production method, for example, the method described in International Publication No. 01/27124 pamphlet can be employed.

  Further, it reacts with an organoaluminum oxy compound (b-1) (hereinafter also referred to as “component (b-1)”) and a metallocene compound (a) (hereinafter also referred to as “component (a)”) to form an ion pair. Specifics of compound to be formed (hereinafter also referred to as “component (b-2)”), organoaluminum compound (b-3) (hereinafter also referred to as “component (b-3)”), and particulate carrier (c) Examples include those compounds or carriers conventionally known in the field of olefin polymerization, such as the specific examples described in WO 01/27124.

In the production of the 4-methyl-1-pentene / α-olefin copolymer (A), the polymerization can be carried out by either a liquid phase polymerization method such as solution polymerization or suspension polymerization or a gas phase polymerization method.
In the liquid phase polymerization method, an inert hydrocarbon solvent may be used. Specific examples of the inert hydrocarbon include aliphatic carbon such as propane, butane, pentane, hexane, heptane, octane, decane, dodecane, and kerosene. Hydrogen; cycloaliphatic hydrocarbons such as cyclopentane, cyclohexane, methylcyclopentane, and methylcyclohexane; aromatic hydrocarbons such as benzene, toluene, and xylene; and halogens such as ethylene chloride, chlorobenzene, dichloromethane, trichloromethane, and tetrachloromethane And hydrocarbons, and mixtures thereof.

Bulk polymerization using 4-methyl-1-pentene and α-olefin itself as a solvent can also be carried out.
Further, 4-methyl-1-pentene having a controlled composition distribution was obtained by performing stepwise polymerization of 4-methyl-1-pentene and copolymerization of 4-methyl-1-pentene and α-olefin. It is also possible to obtain an α-olefin copolymer (A).

In carrying out the polymerization, the component (a) is usually 10 ⁻⁸ to 10 ⁻² mol, preferably 10 ⁻⁷ to 10 ⁻³ mol, in terms of group 4 metal atom in the periodic table, per liter of reaction volume. Used in various amounts. In the component (b-1), the molar ratio [(b-1) / M] of the component (b-1) and the transition metal atom (M) in the component (a) is usually 0.01 to 5000, Preferably it is used in such an amount that it is 0.05-2000. In the component (b-2), the molar ratio [(b-2) / M] of the component (b-2) and the transition metal atom (M) in the component (a) is usually 1 to 10, preferably 1. Used in an amount such that it is ˜5. Component (b-3) has a molar ratio [(b-2) / M] of component (b-3) to transition metal atom (M) in component (a) of usually 10 to 5000, preferably 20 It is used in an amount such that it is ˜2000.

The polymerization temperature is usually in the range of −50 to 200 ° C., preferably 0 to 100 ° C., more preferably 20 to 100 ° C.
The polymerization pressure is usually normal pressure to 10 MPa gauge pressure, preferably normal pressure to 5 MPa gauge pressure, and the polymerization reaction can be carried out in any of batch, semi-continuous and continuous methods. Furthermore, the polymerization can be performed in two or more stages having different reaction conditions.

  Hydrogen may be added for the purpose of controlling the molecular weight and polymerization activity of the produced polymer during the polymerization, and the amount is suitably about 0.001 to 100 NL per 1 kg of the total of 4-methyl-1-pentene and α-olefin. .

<Other components (B)>
The vibration isolator of the present invention is a composition containing, in addition to the 4-methyl-1-pentene / α-olefin copolymer (A), other components (B) within a range that does not impair the object of the present invention. There may be.

  Other components (B) include thermoplastic resins other than the copolymer (A), rubber, various weather stabilizers, heat stabilizers, antioxidants, ultraviolet absorbers, antistatic agents, antislip agents, Blocking agent, antifogging agent, nucleating agent, lubricant, pigment, dye, anti-aging agent, hydrochloric acid absorbent, inorganic or organic filler, organic or inorganic foaming agent, crosslinking agent, co-crosslinking agent, crosslinking aid, An adhesive, a softening agent, a flame retardant, etc. are mentioned.

(Thermoplastic resin or rubber)
There is no restriction | limiting in particular as said thermoplastic resin or rubber | gum (henceforth "resin or rubber | gum (B1)"), For example, the following resin and rubber | gum are mentioned.

Thermoplastic polyolefin resin (excluding the copolymer (A)), specifically, low density, medium density, high density polyethylene, high pressure method low density polyethylene, isotactic polypropylene, syndiotactic polypropylene, poly 1-butene, poly-4-methyl-1-pentene, poly-3-methyl-1-butene, ethylene / α-olefin copolymer, propylene / α-olefin copolymer, 1-butene / α-olefin copolymer , Cyclic olefin copolymer, chlorinated polyolefin;
Thermoplastic polyamide resins, specifically aliphatic polyamides (nylon 6, nylon 11, nylon 12, nylon 66, nylon 610, nylon 612);
Thermoplastic polyester resin, specifically, polyethylene terephthalate, polybutylene terephthalate, polyester elastomer;
Thermoplastic vinyl aromatic resins, specifically polystyrene, ABS resin, AS resin, styrene elastomer (styrene / butadiene / styrene block polymer, styrene / isoprene / styrene block polymer, styrene / isobutylene / styrene block polymer, and The aforementioned hydrogenated product);
Thermoplastic polyurethane; vinyl chloride resin; vinylidene chloride resin; acrylic resin; ethylene / vinyl acetate copolymer; ethylene / methacrylic acid acrylate copolymer; ionomer; ethylene / vinyl alcohol copolymer; polyvinyl alcohol; Polyacetal; Polyphenylene oxide; Polyphenylene sulfide polyimide; Polyarylate; Polysulfone; Polyethersulfone; Rosin resin; Terpene resin; Petroleum resin;
Copolymer rubber, specifically, ethylene / α-olefin / diene copolymer, propylene / α-olefin / diene copolymer, 1-butene / α-olefin / diene copolymer, polybutadiene rubber, polyisoprene Examples thereof include rubber, neoprene rubber, nitrile rubber, butyl rubber, halogenated butyl rubber, polyisobutylene rubber, natural rubber, and silicone rubber.

These thermoplastic resins and rubbers may be used alone or in combination of two or more.
Among these, low density, medium density, high density polyethylene, high pressure method low density polyethylene, isotactic polypropylene, syndiotactic polypropylene, poly 1-butene, poly 4-methyl-1-pentene, poly 3-methyl-1 -Butene, ethylene / α-olefin copolymer, propylene / α-olefin copolymer, 1-butene / α-olefin copolymer, polystyrene, styrene elastomer, ethylene / vinyl acetate copolymer, ethylene / methacrylic acid Acrylate copolymer, ionomer, fluorine resin, rosin resin, terpene resin and petroleum resin, ethylene / α-olefin / diene copolymer, propylene / α-olefin / diene copolymer, 1-butene / α- Olefin-diene copolymer, polybutadiene rubber, polyisopropylene Ren rubber, neoprene rubber, nitrile rubber, butyl rubber, polyisobutylene rubber, and silicone rubber are preferable. Isotactic polypropylene, poly-1-butene, poly-4-methyl-1-pentene, and ethylene / α-olefin copolymer are preferable. Polymer, propylene / α-olefin copolymer, 1-butene / α-olefin copolymer, ethylene / vinyl acetate copolymer, styrene elastomer, rosin resin, terpene resin, petroleum resin, ethylene / α-olefin・ Diene copolymer, propylene / α-olefin / diene copolymer, 1-butene / α-olefin / diene copolymer, polybutadiene rubber, polyisoprene rubber, neoprene rubber, nitrile rubber, butyl rubber, polyisobutylene rubber, silicone Rubber.

  Examples of the rosin resin include natural rosin, polymerized rosin, modified rosin and rosin derivatives modified with maleic acid, fumaric acid, (meth) acrylic acid, and the like. Examples of the rosin derivative include the above-mentioned natural rosin, polymerized rosin or esterified product of modified rosin, phenol-modified product and esterified product thereof. Furthermore, these hydrogenated substances can also be mentioned.

  Examples of the terpene resin include resins composed of α-pinene, β-pinene, limonene, dipentene, terpene phenol, terpene alcohol, terpene aldehyde, etc., and α-pinene, β-pinene, limonene, dipentene, etc. An aromatic modified terpene resin obtained by polymerizing aromatic monomers such as α-methylstyrene and isopropenyltoluene. Moreover, these hydrogenated substances can also be mentioned.

  Examples of the petroleum resin include an aliphatic petroleum resin mainly containing a C5 fraction of tar naphtha, an aromatic petroleum resin mainly containing a C9 fraction and a copolymer petroleum resin thereof. That is, C5 petroleum resin (resin obtained by polymerizing C5 fraction of naphtha cracked oil), C9 petroleum resin (resin obtained by polymerizing C9 fraction of naphtha cracked oil), C5C9 copolymerized petroleum resin (C5 fraction of naphtha cracked oil) And styrene / α-methylstyrene copolymer petroleum resin, α-methylstyrene polymer petroleum resin, isopropenyltoluene polymer petroleum resin, and the like. Coumarone indene resins containing styrenes, indenes, coumarone, other dicyclopentadiene, alkylphenol resins represented by condensates of p-tertiarybutylphenol and acetylene, o-xylene, p-xylene or Examples thereof include xylene-based resins obtained by reacting m-xylene with formalin.

  One or more resins selected from the group consisting of rosin resins, terpene resins, and petroleum resins are preferably hydrogenated derivatives because they are excellent in weather resistance and discoloration resistance. The softening point of the resin by the ring and ball method is preferably in the range of 40 to 180 ° C. The number average molecular weight (Mn) molecular weight measured by GPC of the resin is preferably in the range of about 100 to 10,000.

A commercially available product may be used as one or more resins selected from the group consisting of rosin resins, terpene resins and petroleum resins.
When the composition contains the resin or rubber (B1), when the total amount of the copolymer (A) and the resin or rubber (B1) is 100 parts by weight, from the viewpoint of vibration-proof performance The lower limit of the content of the copolymer (A) in the composition is preferably 30 parts by weight, more preferably 45 parts by weight, particularly preferably 50 parts by weight. From the viewpoint of mechanical properties, The upper limit of the combined (A) content is preferably 98 parts by weight, more preferably 95 parts by weight, and particularly preferably 90 parts by weight.

(Softener)
The anti-vibration material composition of the present invention may contain a softener as necessary within a range that does not impair the object of the present invention. As the softener, a conventionally known softener that is usually used can be used. Specifically, petroleum-based substances such as process oil, lubricating oil, paraffin, liquid paraffin, polyethylene wax, polypropylene wax, petroleum asphalt and petroleum jelly; coal tars such as coal tar and coal tar pitch; castor oil, linseed oil, Fat oils such as rapeseed oil, soybean oil and coconut oil; waxes such as tall oil, beeswax, carnauba wax and lanolin; ricinoleic acid, palmitic acid, stearic acid, 12-hydroxystearic acid, montanic acid, oleic acid and elca Fatty acids such as acids or metal salts thereof; synthetic polymers such as petroleum resins, coumarone indene resins and atactic polypropylene; ester plasticizers such as dioctyl phthalate, dioctyl adipate and dioctyl sebacate; other microcrystals WAX, and liquid polybutadiene or its modified product or hydrogenated product; and liquid Thiokol and the like.

(Inorganic filler)
Examples of the inorganic filler include powder fillers such as mica, carbon black, silica, calcium carbonate, talc, graphite, stainless steel, and aluminum; and fibrous fillers such as glass fiber and metal fiber. Among these, mica is preferable because it has an effect of improving the attenuation.

  When the vibration isolator is composed of a composition containing the other component (B), the composition can be obtained by a conventionally known mixing method such as plastmill, Henschel mixer, V-blender, ribbon blender, tumbler blender, kneader ruder, etc. It can be produced by mixing, or after mixing, melt kneading with a single screw extruder, twin screw extruder, kneader, Banbury mixer or the like, followed by granulation or pulverization.

<Vibration isolator>
The vibration isolator of the present invention contains at least the 4-methyl-1-pentene / α-olefin copolymer (A), and is excellent in flexibility, light weight, and vibration isolation.

The vibration isolator of the present invention preferably has the following physical properties.
(X): Shore A hardness value (value 15 seconds after contact with the pusher needle. Details of measurement conditions and the like are as described in the column of Examples described later) are 5 to 95, preferably 10 It is -85, More preferably, it is 15-80.

(W): Change in value of Shore A hardness (measured in the state of a press sheet having a thickness of 3 mm according to JIS K6253) as defined by the following formula, ΔHS is 10 to 60, preferably 10 to 50, more preferably 15-40.
ΔHS = (Shore A hardness value immediately after start of pressing needle contact−Shore A hardness value 15 seconds after start of pressing needle contact)

  The Shore A hardness value of the vibration isolator according to the present invention is the comonomer composition ratio of 4-methyl-1-pentene / α-olefin copolymer (A), or the vibration isolator of the present invention (for example, the vibration isolator ( X1)) can be arbitrarily changed depending on the mixing ratio of the components, and when the Shore A hardness value is within the above range, the vibration-proof material is excellent in flexibility.

  (Y): Obtained by measuring the dynamic viscoelasticity in the temperature range of −40 ° C. to 150 ° C. at a frequency of 10 rad / s (details of measurement conditions and the like are as described in the column of Examples described later). The maximum value of the loss tangent tan δ is 0.6 to 10, preferably 0.7 to 8, more preferably 0.7 to 6, and still more preferably 0.7 to 4. The temperature at which the value of tan δ is maximized is in the range of −25 ° C. to 100 ° C., preferably −20 ° C. to 50 ° C., more preferably −10 ° C. to 40 ° C.

  If the maximum value of tan δ is within these ranges, it is possible to exhibit vibration isolation. The maximum value of tan δ is the comonomer composition ratio of the 4-methyl-1-pentene / α-olefin copolymer (A), or the copolymer (for example, the vibration-proof material (X1)) of the vibration-proof material of the present invention ( It can be controlled by the mixing ratio of A).

(Z): Rebound resilience (%) defined by the following formula (details of measurement conditions and the like are as described in the column of Examples below) are 0 to 45% at 40 ° C., preferably Is 0 to 40%, more preferably 0 to 35%.
Rebound resilience (%) = (Rebound height) (mm) / 460 × 100
The rebound resilience is the comonomer composition ratio of 4-methyl-1-pentene / α-olefin copolymer (A), or the copolymer (A in the vibration isolator (X1) of the present invention). ) And the like.

<Graft modification>
As long as the object of the present invention is not impaired, a part or all of the 4-methyl-1-pentene / α-olefin copolymer (A) may be graft-modified, and the other component (B). Part or all may be graft-modified. Examples of the polar compound used for graft modification and the graft modification method include conventionally known compounds and methods. For example, the compounds and methods described in JP-A-2008-127440 can be employed.

The graft amount of the graft modified product is usually 0.1 to 40% by weight, preferably 0.2 to 30% by weight, and more preferably 0.2 to 20% by weight.
When the 4-methyl-1-pentene / α-olefin copolymer (A) or the thermoplastic resin is graft-modified, it is advantageous in terms of compatibility or adhesiveness of the composition.

<Crosslinking>
At least a part or all of the vibration isolator may be cross-linked by a cross-linking agent.
There is no restriction | limiting in particular as a crosslinking agent, Sulfur, an organic peroxide, and a SiH group containing compound are mentioned. When using sulfur, the amount thereof is preferably 0.1 with respect to a total of 100 parts by weight of the copolymer (A) and the thermoplastic resin as the other component (B) in the vibration-proof material. -10 parts by weight. When the organic peroxide is used, the amount thereof is preferably 0.05 to 15 parts by weight with respect to 100 parts by weight in total of the copolymer (A) and the thermoplastic resin in the vibration-proof material. is there.

  Further, when the SiH group-containing compound is used, the amount thereof is preferably 0.2 to 20 weights with respect to a total of 100 parts by weight of the copolymer (A) and the thermoplastic resin in the vibration-proof material. Parts, more preferably 0.5 to 10 parts by weight, still more preferably 0.5 to 5 parts by weight. When using an SiH group-containing compound, a silane coupling agent and / or a reaction inhibitor may be added as a catalyst and optional components.

[Vibration isolation member]
The vibration isolator of the present invention comprises at least a part of the vibration isolator of the present invention.
Specific examples of the anti-vibration member include anti-vibration members for devices such as magneto-optical disks, insulators, anti-vibration members for copying machines, anti-vibration members for motors, anti-vibration members for car navigation systems, automobiles, trains, Anti-vibration members for transport machinery such as aircraft and ships, anti-vibration members for machine tools, industrial machinery, OA equipment, anti-vibration members for electrical products such as home appliances, anti-vibration members for audio equipment such as audio products, Etc.

The anti-vibration member of the present invention can be manufactured by the same method as the conventional method of manufacturing the anti-vibration member, except that the material is the anti-vibration material of the present invention.
The anti-vibration material and anti-vibration member of the present invention have the following advantages.

-Since the rebound resilience is low and the loss tangent tan δ is high, the anti-vibration property is excellent.
-Light weight due to low density.
-Since the JIS A hardness is low, the moldability is good and the flexibility is excellent.
・ There is no odor unlike vibration-proof materials and vibration-proof members made of silicone rubber or styrene elastomer.
When the copolymer (A) is produced using a metallocene catalyst, the low-molecular-weight component is extremely small, so the vibration-proof material and the vibration-proof member are not sticky and have little volatile component. .
-Since the loss factor by the vibration isolation measurement by the central vibration method is high, it is excellent in vibration isolation and vibration control.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited at all by these Examples.

[Measurement conditions]
The measurement conditions of the physical properties in the examples are as follows.
〔composition〕
The 4-methyl-1-pentene and propylene contents in the polymer were measured by ¹³ C-NMR with the following apparatus and conditions. Using an ECP500 type nuclear magnetic resonance apparatus manufactured by JEOL Ltd., a mixed solvent of orthodichlorobenzene / heavy benzene (80/20% by volume) as a solvent, sample concentration 55 mg / 0.6 mL, measurement temperature 120 ° C., observation nucleus ¹³ C (125 MHz), sequence is single pulse proton decoupling, pulse width is 4.7 μs (45 ° pulse), repetition time is 5.5 seconds, integration number is 10,000 times or more, 27.50 ppm as standard for chemical shift Measured as a value.

〔density〕
The density of the copolymer (A) was calculated from the weight of each sample measured in water and in air using ALFA MIRAGE electronic hydrometer MD-300S according to ASTM D 1505 (in-water replacement method).

[Melting point (Tm)]
The melting point (Tm) of the polymer was measured with a differential scanning calorimeter (DSC) using a DSC220C apparatus manufactured by Seiko Instruments Inc. Samples 7-12 mg obtained from the polymerization were sealed in an aluminum pan and heated from room temperature to 200 ° C. at 10 ° C./min. The sample was held at 200 ° C. for 5 minutes to completely melt and then cooled to −50 ° C. at 10 ° C./min. After 5 minutes at −50 ° C., the sample was heated again to 200 ° C. at 10 ° C./min. This peak temperature in the second heating (second time) was adopted as the melting point (Tm).

[Intrinsic viscosity]
The intrinsic viscosity [η] was measured at 135 ° C. using a decalin solvent.
[Molecular weight (Mw, Mn) / Molecular weight distribution (Mw / Mn)]
The molecular weight of the copolymer (A) was measured using a liquid chromatograph: Waters ALC / GPC 150-C plus (integrated refractometer detector), and two columns of GMH6-HT manufactured by Tosoh Corporation and GMH6. -Two HTLs were connected in series, and o-dichlorobenzene was used as a mobile phase medium, and measurement was performed at a flow rate of 1.0 ml / min and 140 ° C.

  Mw / Mn value and Mz / Mw value were calculated by analyzing the obtained chromatogram by a known method using a calibration curve using a standard polystyrene sample. The measurement time per sample was 60 minutes.

[Methyl acetate extraction amount]
The polymer was collected in a Soxhlet extractor, heated to reflux under methyl acetate, the amount of polymer before and after reflux was weighed, and the amount of extraction (% by weight) was calculated.

[Methods for producing various measurement press sheets]
Hydraulic heat press machine manufactured by Shindo Metal Industry Co., Ltd., in which each of the vibration-proofing materials of Examples, Reference Examples and Comparative Examples (namely, the vibration-proofing material consisting only of a polymer or the vibration-proofing material consisting of a resin composition) was set at 190 ° C The sheet was formed at a pressure of 10 MPa. In the case of a sheet having a thickness of 1 to 3 mm (spacer shape; 80 × 80 × 0.5 to 3 mm, 4 pieces on a 240 × 240 × 2 mm thick plate), the remaining heat is about 5 to 7 minutes, and 1 to 2 at 10 MPa. After pressurizing for a minute, using another hydraulic hot press machine manufactured by Shinfuji Metal Industry Co., Ltd. set at 20 ° C., the sample was compressed at 10 MPa and cooled for about 5 minutes to prepare a measurement sample. A 5 mm thick brass plate was used as the hot plate. Samples prepared by the above method were used for various physical property evaluation samples.

[Shore A hardness]
In the measurement of Shore A hardness (based on JIS K6253), a press sheet having a thickness of 3 mm was used as a measurement sample, and the graduations were read immediately after the start of pressing contact and 15 seconds after the start of pressing contact. Further, the change ΔHS of the Shore A hardness value defined by the following equation was obtained as follows.
ΔHS = (Shore hardness value immediately after start of pressing needle contact−Shore hardness value 15 seconds after start of pressing needle contact).

(Dynamic viscoelasticity)
A press sheet having a thickness of 3 mm was prepared, and a strip of 45 mm × 10 mm × 3 mm necessary for dynamic viscoelasticity measurement was cut out. The temperature dependence of dynamic viscoelasticity from −40 to 180 ° C. was measured at a frequency of 10 rad / s using MTON 301 manufactured by ANTONPaar, and the loss tangent (tan δ) due to the glass transition temperature was the peak value (maximum value). ) (Hereinafter also referred to as “peak temperature”), and the value of loss tangent (tan δ) at that time.
Furthermore, tan δ at 20 ° C. was measured.

[Rebound resilience]
A press sheet having a thickness of 6 mm was produced, and in accordance with JIS K6400, a rebound height L (mm) when a 16.310 g rigid sphere was dropped from a height of 460 mm onto the press sheet was measured. The impact resilience defined by the following formula was determined.
Rebound resilience (%) = L (mm) / 460 × 100

[Anti-vibration test by the central excitation method]
Each of the vibration isolating materials of Examples, Reference Examples and Comparative Examples was formed into a sheet of 20 mm × 200 mm × 2 mm at a pressure of 10 MPa using a hydraulic hot press machine manufactured by Shindo Metal Industry Co., Ltd. set at 190 ° C. Then, a temperature-unconstrained vibration-proof material was produced by sandwiching it between 2 mm thick steel plates. Here, the sheet | seat was crimped | bonded to the iron plate with the pressure of 190 degreeC and 10 Mpa by the hot press method.

  About the obtained unrestrained type vibration-proof material, the loss coefficient was measured by the central vibration method at the temperature of 23 degreeC using the loss coefficient measuring apparatus (made by Shimadzu Corporation). The anti-vibration performance was evaluated by comparing the maximum values of the obtained loss factors. Note that the greater the loss factor, the higher the anti-vibration performance.

[Reference Example 1]
750 ml of 4-methyl-1-pentene was charged at 23 ° C. into a SUS autoclave with a stirring blade having a capacity of 1.5 liters sufficiently purged with nitrogen. The autoclave was charged with 0.75 ml of a 1.0 mmol / ml toluene solution of triisobutylaluminum (TIBAl), and the stirrer was rotated. Next, the autoclave was heated to an internal temperature of 30 ° C. and pressurized with propylene so that the total pressure was 0.74 MPaG. Subsequently, methylaluminoxane prepared in advance, 1 mmol in terms of Al, diphenylmethylene (1-methyl-3-t-butyl-cyclopentadienyl) (2,7-di-t-butyl-fluorenyl) A toluene solution containing 0.35 ml of zirconium dichloride in an amount of 0.005 mmol was pressed into the autoclave with nitrogen to initiate polymerization. Thereafter, the temperature of the autoclave was adjusted to 60 ° C. for 60 minutes. Sixty minutes after the start of polymerization, 5 ml of methanol was injected into the autoclave with nitrogen to stop the polymerization, and the autoclave was depressurized to atmospheric pressure. Acetone was poured into the reaction solution with stirring. The resulting rubbery polymer containing the solvent was dried at 130 ° C. under reduced pressure for 12 hours. The obtained polymer was 56.3 g, and the propylene content in the polymer was 75.3 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] was 1.5 dl / g. The molecular weight distribution obtained from GPC was Mw = 287000, Mn = 144000, and Mw / Mn = 2.0. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 2]
Polymerization was carried out in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.68 MPaG. The obtained polymer was 45.9 g, and the propylene content in the polymer was 68.9 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] was 1.5 dl / g. The molecular weight distribution obtained from GPC was Mw = 267000, Mn = 1340, Mw / Mn = 2.0. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 3]
Polymerization was carried out in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.35 MPaG. The obtained polymer was 46.9 g, and the propylene content in the polymer was 52.7 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] = 1.4 dl / g. The molecular weight distribution obtained from GPC was Mw = 277000, Mn = 132000, Mw / Mn = 2.1. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 4]
Polymerization was carried out in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.20 MPaG. The obtained polymer was 35.5 g, and the propylene content in the polymer was 40.0 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] = 1.4 dl / g. The molecular weights obtained from GPC were Mw = 272000, Mn = 131000, Mw / Mn = 2.1. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 5]
Polymerization was performed in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.15 MPaG. The obtained polymer was 46.9 g, and the propylene content in the polymer was 38.0 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] = 1.4 dl / g. The molecular weight distribution obtained from GPC was Mw = 295000, Mn = 142000, Mw / Mn = 2.1. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 6]
Polymerization was carried out in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.10 MPaG. The obtained polymer was 29.7 g, and the propylene content in the polymer was 28.1 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] = 1.4 dl / g. The molecular weight distribution obtained from GPC was Mw = 289000, Mn = 138000, and Mw / Mn = 2.1. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Reference Example 7]
Polymerization was performed in the same manner as in Reference Example 1 except that propylene was pressurized so that the total pressure in the polymerization vessel was 0.09 MPaG. The obtained polymer was 24.7 g, and the propylene content in the polymer was 27.5 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] = 1.54 dl / g. The molecular weight distribution obtained from GPC was Mw = 337000, Mn = 164000, and Mw / Mn = 2.06. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Comparative Example 1]
Polymerization was carried out in the same manner as in Reference Example 1 except that 100 ml of 4-methyl-1-pentene in the polymerization vessel and 650 ml of hexane as a polymerization solvent were added and pressurized with propylene so that the total pressure became 0.68 MPaG. . The obtained polymer was 21.2 g, and the propylene content in the polymer was 90.0 mol%. The polymer had a Tm of 69.1 ° C. and an intrinsic viscosity [η] of 1.31 dl / g. The molecular weight distribution obtained from GPC was Mw = 262000, Mn = 133000, Mw / Mn = 2.0. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Comparative Example 2]
Polymerization was carried out in the same manner as in Reference Example 1 except that 750 ml of 4-methyl-1-pentene in the polymerization vessel was pressurized with propylene so that the total pressure was 0.05 MPaG and the polymerization temperature was 60 ° C. The obtained polymer was 21.2 g, and the propylene content in the polymer was 9.8 mol%. The polymer had a Tm of 144.1 ° C. and an intrinsic viscosity [η] of 1.45 dl / g. The molecular weight distribution obtained from GPC was Mw = 296000, Mn = 148000, and Mw / Mn = 2.1. Table 1 shows the physical properties of the obtained polymer (vibration-proof material).

[Comparative Example 3]
750 ml of 4-methyl-1-pentene was charged at 23 ° C. into a 1.5-liter SUS autoclave with a stirring blade sufficiently purged with nitrogen. To this autoclave, 0.94 ml of a 1.0 mmol / ml toluene solution of triethylaluminum (TEA) was charged, 120 Nml of hydrogen gas was introduced, and the stirrer was rotated. Next, the autoclave was heated to an internal temperature of 60 ° C. and pressurized with propylene so that the total pressure was 0.21 MPaG. Subsequently, a toluene solution containing 0.013 mmol of a solid titanium catalyst prepared on the basis of the published Japanese Patent Application Laid-Open No. 2008-144155 was injected into the autoclave with 4.7 ml of nitrogen to initiate polymerization. Thereafter, the temperature of the autoclave was adjusted to 60 ° C. for 60 minutes. Sixty minutes after the start of polymerization, 5 ml of methanol was injected into the autoclave with nitrogen to stop the polymerization, and the autoclave was depressurized to atmospheric pressure. Acetone was poured into the reaction solution with stirring. The resulting rubbery polymer containing the solvent was dried at 130 ° C. under reduced pressure for 12 hours. The obtained polymer was 47.9 g, and the propylene content in the polymer was 67.2 mol%. The Tm of the polymer was not observed, and the intrinsic viscosity [η] was 1.78 dl / g. The obtained physical properties are shown in Table 1. It can be seen from the peak value of tan δ that the anti-vibration property is poor.

[Comparative Example 4]
A commercially available hydrogenated styrene / isoprene / styrene copolymer (manufactured by Kuraray Co., Ltd., Hibler 5127) was used. The MFR at 190 ° C. was 5 g / 10 min. Table 1 shows the physical properties of the comparative examples. It turns out that it is inferior to lightness from the value of a density.

[Comparative Example 5]
A commercially available ethylene / α-olefin copolymer (Mitsui Chemicals, Tuffmer P0680) was used. The MFR at 190 ° C. was 0.8 g / 10 min. Table 1 shows the physical properties of the comparative examples. From the rebound resilience, the peak value of tan δ, and the temperature value, it can be seen that the anti-vibration property is poor.

[Comparative Example 6]
A commercially available ethylene / α-olefin copolymer (Mitsui Chemicals, Tuffmer A4070) was used. The MFR at 190 ° C. was 0.8 g / 10 min. Table 1 shows the physical properties of the comparative examples. From the rebound resilience, the peak value of tan δ, and the temperature value, it can be seen that the anti-vibration property is poor.

表１から明らかなように、参考例に示したポリマー（共重合体（Ａ））は、ｔａｎδ値および反発弾性率の値、中央加振法から測定した損失係数から、防振性に優れている。したがって、これらのポリマーを含む防振材は防振性に優れており、該防振材から防振性に優れた防振部材を製造できることがわかる。

As is apparent from Table 1, the polymer (copolymer (A)) shown in the reference example has excellent vibration proofing properties from the tan δ value, the rebound resilience value, and the loss coefficient measured by the central vibration method. Yes. Therefore, it can be seen that the vibration proofing material containing these polymers has excellent vibration proofing properties, and a vibration proofing member having excellent vibration proofing properties can be produced from the vibration proofing material.

[Reference Example 8]
80 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 2 and 20 parts by weight of Polypropylene F107 manufactured by Prime Polymer Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  This was cut into an appropriate size to obtain a measurement sample. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

Example 9
80 parts by weight of the 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 20 parts by weight of Polypropylene F107 manufactured by Prime Polymer Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  This was cut into an appropriate size to obtain a measurement sample. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[Reference Example 10]
70 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 2, 20 parts by weight of polypropylene F107 manufactured by Prime Polymer Co., Ltd., and ethylene / α-olefin manufactured by Mitsui Chemicals, Inc. 10 parts by weight of copolymer Tuffmer A4070 was blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[Reference Example 11]
45 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 1 and 55 parts by weight of hydrogenated styrene / isoprene / styrene copolymer Hibler 5127 manufactured by Kuraray Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[ Reference Example 12]
45 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 55 parts by weight of hydrogenated styrene / isoprene / styrene copolymer Hibler 5127 manufactured by Kuraray Co., Ltd. were blended. Furthermore, 1000 ppm of hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of phosphorus processing thermosetting agent Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. are obtained with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

Example 13
65 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 35 parts by weight of hydrogenated styrene / isoprene / styrene copolymer Hibler 5127 manufactured by Kuraray Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[Reference Example 14]
75 parts by weight of the 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 1 and 25 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[Reference Example 15]
50 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 1 and 50 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen that the peak value of tan δ is high and the anti-vibration property is excellent.

[ Reference Example 16]
50 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 50 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

Example 17
75 parts by weight of the 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 7 and 25 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

[ Reference Example 18]
50 parts by weight of the 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 7 and 50 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

[ Reference Example 19]
30 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 7 and 70 parts by weight of Miralastomer 5030N manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

Example 20
75 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 25 parts by weight of Mitsui Chemicals, Inc. ethylene / α-olefin copolymer Tuffmer A4050S were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

Example 21
75 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 25 parts by weight of Evolue SP0540 manufactured by Prime Polymer Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

[ Reference Example 22]
50 parts by weight of 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 50 parts by weight of Evolue SP0540 manufactured by Prime Polymer Co., Ltd. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

Example 23
75 parts by weight of the 4-methyl-1-pentene / propylene copolymer obtained in Reference Example 5 and 25 parts by weight of Asahi Kasei Corporation low density polyethylene F2204.1 were blended. Furthermore, 1000 ppm of hindered phenolic antioxidant Iranox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of phosphorous processing heat stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the peak value of tan δ that the anti-vibration property is excellent.

[Comparative Example 7]
70 parts by weight of polypropylene F107 manufactured by Prime Polymer Co., Ltd. and 30 parts by weight of ethylene / α-olefin copolymer Tuffmer H130 manufactured by Mitsui Chemicals, Inc. were blended. Furthermore, 1000 ppm of the hindered phenolic antioxidant Irganox 1010 manufactured by Ciba Japan Co., Ltd., 1000 ppm of the phosphorus processing thermal stabilizer Irgafos 168, and 500 ppm of calcium stearate manufactured by NOF Co., Ltd. with respect to the obtained mixture. Blended. These were melted using a lab plast mill (biaxial batch type melt kneader) manufactured by Toyo Seiki Co., Ltd. at a set temperature of 200 ° C., with a resin charge of 40 g (apparatus batch volume = 60 cm ³ ), 50 rpm, and 5 minutes. After kneading, it was taken out and cooled with a cooling press set at 20 ° C. to obtain a sheet-shaped resin composition (vibration-proofing material).

  A sample for measurement was prepared by cutting the sample into an appropriate size. In addition, a press sheet was prepared using the sample, and the physical properties were measured. Table 2 shows the measurement results of various physical properties. It can be seen from the rebound resilience that the anti-vibration properties are poor.

[Comparative Example 8]
Table 2 shows the physical properties of commercially available olefin thermoplastic elastomer Miralastomer 5030N manufactured by Mitsui Chemicals.

Claims (5)

4-methyl-1-pentene / α-olefin copolymer (A) satisfying the following requirements (a), (b), (c) and (d), and a thermoplastic resin (provided that the copolymer (A) excluding.) or rubber (B1) I resin composition der containing the content of the copolymer in the composition (a) is the thermoplastic resin or rubber and the copolymer (a) Anti-vibration material is 65 parts by weight or more with respect to 100 parts by weight in total with (B1) :
(A) From a structural unit (i) derived from 15 to 75 mol% of 4-methyl-1-pentene and 25 to 85 mol% of an α-olefin (excluding 4-methyl-1-pentene). The derived structural unit (ii) (however, the sum of the proportion of the structural unit (i) and the proportion of the structural unit (ii) is 100 mol%).
(B) The intrinsic viscosity [η] measured at 135 ° C. in decalin is in the range of 0.1 to 5.0 dL / g.
(C) The ratio (molecular weight distribution; Mw / Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is in the range of 1.0 to 3.5. It is in.
(D) The density is in the range of 880 to 810 kg / m ³ .
(However, 4-methyl-1-pentene / propylene copolymer (A ′) satisfying the following requirement (a ′) and the above requirements (b), (c) and (d), and a thermoplastic resin (provided that A resin composition containing a polymer (A ′) or rubber (B1), and a vibration-proof material that satisfies one or both of the following requirements (y) and (z) is excluded.
(A ′) a structural unit (i) derived from 15 to 32 mol% of 4-methyl-1-pentene and a structural unit (ii) derived from 68 to 85 mol% of propylene (provided that the structural unit (i) And the sum of the proportion of the structural unit (ii) is 100 mol%).
(Y): The maximum value of loss tangent tan δ obtained by dynamic viscoelasticity measurement at a frequency of 10 rad / s in the temperature range of −40 ° C. to 150 ° C. is 0.6 to 10, and the value of tan δ is the maximum. The temperature at the time is in the range of -25 ° C to 100 ° C.
(Z): Rebound resilience (%) defined by the following formula is 0 to 45%.
Rebound resilience (%) = L (mm) / 460 × 100
[L is the bounce height of a 16.310 g hard sphere dropped from a height of 460 mm at 40 ° C. on a 6 mm thick press sheet produced from the vibration-proof material in accordance with JIS K6400 It is. ]). The vibration isolator according to claim 1, wherein the following requirement (y) is satisfied.
(Y): The maximum value of loss tangent tan δ obtained by dynamic viscoelasticity measurement at a frequency of 10 rad / s in the temperature range of −40 ° C. to 150 ° C. is 0.6 to 10, and the value of tan δ is the maximum. The temperature at the time is in the range of -25 ° C to 100 ° C. The vibration-proof material according to claim 1 or 2, wherein the following requirement (z) is satisfied.
(Z): Rebound resilience (%) defined by the following formula is 0 to 45%.
Rebound resilience (%) = L (mm) / 460 × 100
[L is the bounce height of a 16.310 g rigid sphere dropped from a height of 460 mm at 40 ° C. on a 6 mm thick press sheet produced from the vibration-proof material in accordance with JIS K6400 It is. ]   The vibration isolator according to any one of claims 1 to 3, wherein the α-olefin is propylene.   A vibration isolating member comprising at least a part of the vibration isolating material according to claim 1.