Technical field
[0001]
　The present invention relates to a crosslinked body and damping material, particularly to crosslinked body and damping material and the high hardness and low rebound resilience is achieved.
Background technique
[0002]
　Building materials, personal computers, OA equipment, AV equipment, electrical and electronic equipment such as mobile phones, optical equipment, precision instruments, toys, parts and housing, such as home and office electrical products, and even more particularly railway vehicles, automobiles, ships, aircraft, etc. the parts and the molding material utilized in the transportation and moving industries, impact resistance, heat resistance, strength, in addition to the general material characteristics such as dimensional stability, vibration damping is required. Accordingly, the damping material is used for such such parts and the molding material.
[0003]
　The damping material, there is a high hardness product having a low hardness products, a relatively high hardness for use in such support acoustic device having the properties of the gel or the like used like the sole of a sports shoe.
[0004]
　The low-hardness products, which various low impact resilience material by a gel or sponge is produced, it is widely used. Low resilience is required in the case of high hardness article, in the conventional high hardness products, maintaining a high hardness can not be obtained a low rebound resilience, will be high hardness is impaired and increase the low impact resilience , there is a problem that both high hardness and low rebound resilience is difficult.
[0005]
　For the high hardness damping material, for example, in Patent Document 1, 4-methyl-1-a structural unit 50-100 wt% derived from pentene, 4-methyl-1-C2-20 except pentene olefin at least one olefin-based polymer comprising at damping material consisting of structural units 0-50 wt% derived from olefins is disclosed selected from.
[0006]
　Patent Document 2, a copolymer such as polyurethane, low impact resilience, vibration-damping polymer compositions wherein the active ingredients to increase the dipole moment amount is blended in the copolymer is disclosed.
[0007]
　Patent Document 3, a shock absorber composition comprising a copolymer containing a vinyl aromatic compound, beyond the tanδ peak 0 ℃ obtained by dynamic viscoelasticity measurement (1 Hz) of the copolymer 20 ° C. is in the range of, and, tan [delta value is 0.4 or more in the whole temperature range of 15 ℃ from 5 ° C., and the shock absorbent composition is disclosed tan [delta value of 15 ℃ is 0.5 or more It is.
[0008]
　Patent Document 4, a peak of 100 rad / sec at the measured loss tangent (tan [delta), at least one in the range of -60 ~ -30 ° C., a rubber composition having at least one in the range of 0 ~ 40 ° C. , alpha, rubber containing β- unsaturated nitrile monomer is copolymerized acrylic copolymer, and ethylene · alpha-olefin copolymer having a peak of the tanδ in the range of -60 ~ -30 ° C. compositions are disclosed.
[0009]
　However, any technology, both high hardness and low rebound resilience, has not been put into fully achieve both a low rebound resilience such particularly high hardness such as durometer 50-80 resilience less than 20% .
CITATION
Patent Literature
[0010]
Patent Document 1: Re Table 2005/121192 discloses
Patent Document 2: JP 2002-179927 Patent Publication
Patent Document 3: Re Table 2008/102761 discloses
Patent Document 4: JP 2007-023258 JP
Summary of the Invention
Problems that the Invention is to Solve
[0011]
　The present inventors have investigated in order to obtain a material that can be both high hardness and low rebound resilience. Specifically, a method of using a combination of known vibration damping material, including the aforementioned materials. However, even if simply combined use of these materials, and high hardness such as Durometer 50 to 80, can not achieve compatibility between the low impact resilience has been found such resilience of 20% or less.
[0012]
　The present invention has both high hardness and low rebound resilience, particularly durometer 50-80 and high hardness and rebound resilience of 20% or less and low rebound resilience and new damping material both have been fulfilled for and their and to provide a manufacturing method.
Means for Solving the Problems
[0013]
　The present inventor has crosslinked body obtained by crosslinking compositions and compositions comprising specific components has both the high hardness and low rebound resilience, from the cross-linked, high hardness and low rebound resilience Doo is obtained a finding with can be obtained vibration damping material that combine, leading to the completion of the present invention.
[0014]
　That is, the present invention relates to the following [1] to [12].
[1] (A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of -50 ~ -30 ° C.
　( B) olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ 40 ° C. 0
　(C) softener 5 to 300 parts by weight
　(D ) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　wherein the said (D) the relative reinforcing filler (C) of the weight of the softener mixing ratio ((C) / (D) ) is the composition of 0.3 to 1.5.
[0015]
[2] (A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of -50 ~ -30 ° C.
　( B) olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ 40 ° C. 0
　(C) softener 5 to 300 parts by weight
　(D ) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　wherein the said (D) the relative reinforcing filler (C) of the weight of the softener mixing ratio ((C) / (D)) is obtained by crosslinking the composition is 0.3 to 1.5, crosslinked durometer hardness (the value immediately after the measurement) is 50 to 80.
[0016]
[3] 1Hz, 0.5%, - 70 ~ 100 ℃ and temperature profile of the heating rate 4 ° C. / min tan [delta obtained by measuring the temperature dependence of dynamic viscoelasticity under the conditions of the bimodal and It shows further crosslinked body according to the above [2] a peak of the tanδ satisfies the following requirements.
[0017]
　(1) peak on the low temperature side is -50 ° C. or higher, present in a temperature range of less than -10 ° C..
　(2) peak on the high temperature side is present in a temperature range of -10 ~ 40 ° C..
[0018]
[4] further crosslinked body according to the above [3] which satisfies the following requirement (3).
　(3) [- 10 ℃ ~ 40 value of tanδ in peaks present in a temperature range of ℃] ≧ [-50 ℃ above, the value of the peak definitive tanδ to exist in a temperature range of less than -10 ° C.]
[0019]
[5] (B) the olefin
　copolymer, 4-methyl-1 content ratio of 16 to 95 mol% of constituent units derived from pentene (i), of carbon atoms 2 ~ 20 alpha-olefin ( 4-methyl-1 content ratio 5-84 mol% of at least one of constituent units derived from α- olefin selected from excluding pentene) (ii), constituent units derived from the non-conjugated polyene (iii) content ratio of 0 to 10 mol% (provided that the structural units (i), (ii) and (a total of iii) is 100 mol%) is (B1) 4-methyl-1-pentene · alpha-olefin copolymer containing polymer, crosslinked body according to any one of [2] to [4].
[0020]
[6] The (D) a reinforcing filler is carbon black, mica, talc, is at least one selected from silica and clay, crosslinked body according to any one of [2] to [5].
[0021]
[7] The (C) softening material is a paraffin oil, crosslinked body according to any one of [2] to [6].
[8] The [2] damping member obtained using the crosslinked body according to [7].
[0022]
[9] The [2] to the shock absorber obtained by using the crosslinked body according to [7].
[10] The [2] to the vibration absorber obtained using the crosslinked body according to [7].
[11] The [2] - resonance suppressing material obtained by using the crosslinked body according to [7].
[0023]
[12] (A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of -50 ~ -30 ° C.
　( B) olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ 40 ° C. 0
　(C) softener 5 to 300 parts by weight
　(D ) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　wherein the said (D) the relative reinforcing filler (C) of the weight of the softener mixing ratio ((C) / (D) ) is process for producing an olefin polymer crosslinked body characterized by reacting the composition is 0.3-1.5 under conditions of 140 ~ 230 ° C..
Effect of the invention
[0024]
　Crosslinked product of the present invention, high hardness and compatibility with low rebound resilience, is implemented to achieve both low rebound resilience such particularly high hardness such as durometer 50-80 resilience of 20% or less, the high from the crosslinked product damping material compatibility of hardness and low rebound resilience is achieved, more various products damping is required is obtained. Moreover, the crosslinked product of the present invention, since containing olefin rubbers, can be expected weather resistance, wet heat resistance and light weight.
DESCRIPTION OF THE INVENTION
[0025]
　Crosslinked product of the present invention,
　the ethylene-alpha-olefin-nonconjugated polyene copolymer is present one or more temperature range of peak -50 ~ -30 ° C. of tanδ obtained by dynamic viscoelasticity measurement (A) 100 parts by weight
　(B) an olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ 40 ° C. 0
　(C) softener 5-300 parts by weight
　(D) a reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　and wherein the said (C) and softener (D) a reinforcing filler ratio of blending ((C) / (D)) is obtained by crosslinking the composition is 0.3-1.5, durometer hardness (the value immediately after the measurement) is 50 to 80.
[0026]
　First, it will be described the composition.

　The composition (A) the ethylene-alpha-olefin-nonconjugated polyene copolymer, (B) an olefinic copolymer, (C) softener, (D) a reinforcing filler, and (E) including a vulcanizing agent.
(A) an ethylene-alpha-olefin-nonconjugated polyene copolymer
　is first described tanδ obtained by dynamic viscoelasticity measurement. To material, for dynamic viscoelasticity measured while continuously changing the ambient temperature, '' measured (Pa), G "(Pa ), loss modulus G / G 'storage modulus G is given by determine the loss tangent tanδ. Looking at the relationship between the temperature and loss tangent tan [delta, the loss tangent tan [delta has a generally peak at a specific temperature. Its peak appears temperature is generally a glass transition temperature (hereinafter, also referred to as a tan [delta-Tg) called. Temperature peak of the loss tangent tanδ appears can be determined based on a dynamic viscoelasticity measurement that describes in the examples.
[0027]
　(A) an ethylene-alpha-olefin-non-conjugated polyene copolymer (hereinafter, also referred to as a copolymer (A)), the peak of the tanδ is present one or more temperature range of -50 ~ -30 ° C..
[0028]
　From the viewpoint of improving the high hardness and low rebound resilience of the crosslinked body obtained from the composition, the copolymer (A), a peak of tanδ preferably in the temperature range of -46 ~ -33 ° C., more preferably has a temperature range of -44 ~ -35 ° C..
[0029]
　The alpha-olefins in (A) an ethylene-alpha-olefin-nonconjugated polyene copolymer, may be mentioned alpha-olefins having 3 to 20 carbon atoms. The α- olefin, e.g., propylene, butene-1,4-methylpentene-1, hexene-1, heptene-1, octene-1, nonene-1, decene-1, undecene-1, dodecene-1, tridecene -1, tetradecene-1, pentadecene-1, hexadecene-1, heptadecene-1, nonadecene-1, eicosene-1,9-methyl - decene-1,11-methyl - dodecene-1,12-ethyl - tetradecene -1 and the like. These α- olefins may be used alone or in combination of two or more.
[0030]
　(A) The nonconjugated polyene in the ethylene-alpha-olefin-nonconjugated polyene copolymer, for example, from 5 to 20 carbon atoms, preferably 5-10, 1,4-pentadiene, 1,4 hexadiene, 1,5-hexadiene, 1,4-octadiene, 1,5-octadiene, 1,6-octadiene, 1,7-octadiene, 2-methyl-1,5-hexadiene, 6-methyl-1,5 heptadiene, 7-methyl-1,6-octadiene, 4-ethylidene-8-methyl-1,7-nonadiene, 4,8-dimethyl-1,4,8-decatriene, dicyclopentadiene, cyclohexadiene, Jishikurookuta dienes, methylene norbornene, 5-vinyl norbornene, 5-ethylidene-2-norbornene, 5-methylene-2-norbornene 5-vinylidene-2-norbornene, 5-isopropylidene-2-norbornene, 6-chloromethyl-5-isopropenyl-2-norbornene, 2,3-isopropylidene-5-norbornene, 2-ethylidene-3-isopropylidene isopropylidene-5-norbornene, and 2-propenyl-2,2-norbornadiene and the like.
[0031]
　(A) In the ethylene-alpha-olefin-nonconjugated polyene copolymer, from the viewpoint of flexibility, the content of constituent units derived from ethylene is preferably 40 to 72 wt%, more preferably 41 to 70 wt%, more preferably 42 to 65 mass%, the content of constituent units derived from the nonconjugated polyene is preferably 2 to 15 mass%, more preferably 3 to 14 mass%, more preferably from 4 to 12 mass% .
[0032]
　(A) In the ethylene-alpha-olefin-nonconjugated polyene copolymer, preferably alpha-olefins having 3 to 10 carbon atoms of the aforementioned alpha-olefins, in particular propylene, 1-butene, 1-hexene, 1- octene and the like are particularly preferred.
[0033]
　(A) In the ethylene-alpha-olefin-nonconjugated polyene copolymer, the preferred non-conjugated polyene of the non-conjugated polyene described above, dicyclopentadiene, 5-vinylidene-2-norbornene, 5-ethylidene-2 norbornene, and the like.
(B) an olefin-based copolymer
　(B) olefin-based copolymer (hereinafter, also referred to as a copolymer (B)), the peak of the tanδ is present one or more temperature range of 0 ~ 40 ° C.. By using a combination of the copolymer (A) and copolymer (B), it is possible to achieve both the high hardness and low rebound resilience of the crosslinked body obtained from the composition. Further, crosslinked body obtained from the composition, since it contains a copolymer which is a olefinic rubber (B), weather resistance, improvement in wet heat resistance and weight reduction can be expected.
[0034]
　From the viewpoint of enhancing the high hardness and low rebound resilience of the crosslinked body obtained from the composition, the copolymer (B) preferably has a peak of tanδ within a temperature range of 4 ~ 36 ℃, 7 ~ 33 and more preferably has a temperature range of ° C..
[0035]
　From the viewpoint of improving the damping properties of the crosslinked product obtained from the composition, the composition, the copolymer (A) 50 ~ 500 parts by weight of a copolymer (B) relative to 100 parts by weight, preferably a proportion of 100 to 400 parts by weight.
[0036]
　Copolymer (B), weather resistance, in terms of ozone resistance, it is preferred to include a 4-methyl-1-pentene · alpha-olefin copolymer.
[0037]
　alpha-olefins in the 4-methyl-1-pentene · alpha-olefin copolymer is, for example, alpha-olefin having 2 to 20 carbon atoms, except 4-methyl-1-pentene, linear or branched Jo of α- olefins, cyclic olefins, aromatic vinyl compounds, conjugated dienes, functionalized vinyl compounds include olefins containing a hydroxy group, a halogenated olefin or the like.
[0038]
　The linear α- olefin of 2 to 20 carbon atoms, preferably from 2 to 15, more preferably 2 to 10, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1- octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like, preferably ethylene, propylene, 1-butene, 1-pentene, 1- hexene, 1-octene.
[0039]
　The branched α- olefins, preferably having 5 to 20 carbon atoms, and more is preferably 5 to 15, 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, 4-ethyl-1-hexene, 3-ethyl-1-hexene.
[0040]
　The cyclic olefin, having 3 to 20 carbon atoms, preferably 5-15, cyclopentene, cyclohexene, heptene cyclohexane, norbornene, 5-methyl-2-norbornene, tetracyclododecene, and the like vinylcyclohexane.
[0041]
　The aromatic vinyl compound, styrene, alpha-methyl styrene, o- methyl styrene, m- methyl styrene, p- methyl styrene, o, p- dimethylstyrene, o- ethylstyrene, m- ethylstyrene, p- ethylstyrene such mono- or polyalkyl styrene and the like.
[0042]
　The conjugated diene, having 4 to 20 carbon atoms, preferably 4 to 10, 1,3-butadiene, isoprene, chloroprene, 1,3-pentadiene, 2,3-dimethyl butadiene, 4-methyl-1,3 - pentadiene, 1,3-hexadiene, 1,3-octadiene and the like.
[0043]
　The functionalized vinyl compounds, hydroxyl group-containing olefins, halogenated olefins, (meth) acrylic acid, propionic acid, 3-butenoic acid, 4-pentenoic acid, 5-hexenoic acid, 6-heptenoic acid, 7-octene acid, 8 nonenoic acid, 9-decenoic acid, unsaturated carboxylic acids such as 10-undecenoic acid, allylamines, 5-hexene amine, unsaturated amine, such as 6-Heputen'amin, (2,7-octadienyl) succinic anhydride, penta Puropenirukohaku acid anhydride, unsaturated carboxylic acid anhydrides such as anhydrous product obtained from the unsaturated carboxylic acids, unsaturated carboxylic acid halides such as halides derived from the unsaturated carboxylic acid, 4-epoxy -1 - butene, 5-epoxy-1-pentene, 6-epoxy-1-hexene, 7-epoxy-1-heptene, 8-epoxy Shi-1-octene, 9-epoxy-1-nonene, 10-epoxy-1-decene, unsaturated epoxy compounds such as 11-epoxy-1-undecene, vinyltriethoxysilane, vinyltrimethoxysilane, 3-Akurokishi trimethoxysilane, .gamma.-glycidoxypropyltrimethoxysilane pills trimethoxysilane, .gamma.-aminopropyltriethoxysilane, .gamma.-methacryloxypropyltrimethoxysilane ethylenically unsaturated silane compounds, such as and the like.
[0044]
　As the hydroxyl group-containing olefin, but it if not particularly limited olefinic compound of the hydroxyl group-containing, for example, terminal hydroxyl group of olefinic compounds. The terminal hydroxyl group of olefinic compounds, vinyl alcohol, allyl alcohol, hydroxylated-1-butene, hydroxylated-1-pentene, hydroxylated-1-hexene, hydroxylated-1-octene, hydroxylated-1-decene, hydroxide-1-undecene, hydroxylated-1-dodecene, hydroxylated-1-tetradecene, hydroxylated-1-hexadecene, hydroxylated-1-octadecene, 2 carbon atoms, such as hydroxylated-eicosene to 20, preferably straight-chain hydroxide -α- olefin 2-15, hydroxide-3-methyl-1-butene, hydroxide-3-methyl-1-pentene, hydroxide-4-methyl-1-pentene, hydroxide-3-ethyl-1-pentene, hydroxide-4,4-dimethyl-1-pentene, hydroxide-4-methyl-1-hexene, hydroxide-4,4-dimethyl-1-hexene, hydroxide 4-d -1-hexene, preferably such as hydroxide-3-ethyl-1-hexene having 5 to 20 carbon atoms, or more preferably branched hydroxide -α- olefin of from 5 to 15 carbon atoms.
[0045]
　As the halogenated olefin, chlorine, bromine, halogenated -α- olefins having periodic table group 17 atoms of iodine, specifically, halogenated vinyl, halogenated-1-butene, halogenated 1-pentene, halogenated-1-hexene, halogenated-1-octene, halogenated-1-decene, halogenated-1-dodecene, halogenated-1-undecene, halogenated-1-tetradecene, halogenated - 1-hexadecene, halogenated-1-octadecene, halogenated-1 number of carbon atoms, such as eicosene 2 to 20, preferably straight-chain halogenated -α- olefin 2-15, halogenated-3-methyl 1-butene, halogenated-4-methyl-1-pentene, halogenated-3-methyl-1-pentene, halogenated-3-ethyl-1- Pentene, halogenated-4,4-dimethyl-1-pentene, halogenated-4-methyl-1-hexene, halogenated-4,4-dimethyl-1-hexene, halogenated-4-ethyl-1-hexene, preferably the halogenated-3-ethyl-1-hexene having 5 to 20 carbon atoms, or more preferably branched halogenated -α- olefin of from 5 to 15 carbon atoms.
[0046]
　The 4-methyl-1-alpha-olefin in pentene · alpha-olefin copolymer may be one kind alone or may be a combination of two or more thereof.
[0047]
　The alpha-olefin in 4-methyl-1-pentene · alpha-olefin copolymer, especially ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl 1-pentene, 1-octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, norbornene, 5-methyl-2-norbornene, Tetorashikurodo decene, hydroxylated-1-undecene is preferred. Furthermore, flexibility, stress absorbing property, in view of stress relaxation resistance, preferably linear α- olefin of 2 to 10 carbon atoms, ethylene, propylene, 1-butene, 1-pentene, 1-hexene and 1-octene are more preferable. Among these, high stress absorbing property, polyolefin modified with in terms obtained, ethylene and propylene are preferred, and propylene is particularly preferable.
[0048]
　The 4-methyl-1-pentene · alpha-olefin copolymer, optionally, may have a constitutional unit derived from non-conjugated polyene. The nonconjugated polyene is similar to the non-conjugated polyene in the ethylene-alpha-olefin-nonconjugated polyene copolymer described above (a).
[0049]
　The 4-methyl-1-pentene · alpha-olefin copolymer, without impairing the object of the present invention may contain other copolymerizable components.
[0050]
　As the 4-methyl-1-pentene · alpha-olefin copolymer, the structural units (i) derived from 4-methyl-1-pentene, 4-methyl-1-C2-20 except pentene having at least one or more kinds of the constituent units derived from the alpha-olefin (ii) and optionally constituent units derived from the nonconjugated polyene (iii) is selected from the alpha-olefin of 4-methyl-1-pentene · alpha-olefin copolymer polymers are preferred. The structural unit (i), as the content ratio of the structural unit (ii) and the structural unit (iii), the structural unit (i), the total of 100 mol% of (ii) and (iii), preferably the structural unit (i ) 16-95 mol%, the structural unit (ii) 5 ~ 84 mol%, the structural unit (iii) 0 to 10 mol%, more preferably the structural unit (i) 26 ~ 90 mol%, the structural unit (ii) 10-74 mol%, a structural unit (iii) 0 ~ 7 mol%, more preferably the structural unit (i) 61 ~ 85 mol%, the structural unit (ii) 15 ~ 39 mol%, the structural unit (iii) 0 ~ is a 5 mol%.
[0051]
　Thus the copolymer (B) content ratio of 16 to 95 mol% of the structural unit (i), the content ratio is 5 to 84 mol% of the structural unit (ii), the content ratio of the structural unit (iii) 0-10 mol% (provided that the structural units (i), (ii) and (a total of iii) is 100 mol%) of a (B1) 4-methyl-1-pentene · alpha-olefin copolymer it is preferable to include.
[0052]
(C) softening material
　as the (C) softening material, process oils such as paraffin oil (for example, "Diana Process Oil PS-430" (trade name: Idemitsu Kosan Co., Ltd.) and the like), lubricating oil, liquid paraffin, petroleum asphalt, and petroleum softener such as vaseline; coal tar, and coal tar based softener of coal tar pitch and the like; castor oil, linseed oil, rapeseed oil, soybean oil, and fatty oil softening material coconut oil; honey wax, carnauba wax, and waxes such as lanolin; ricinoleic acid, palmitic acid, stearic acid, barium stearate, calcium stearate and fatty acid or its salt such as zinc laurate; naphthenic acid, pine oil, and rosin or derivatives thereof; terpene resins, petroleum resins, atactic polypropylene, and Kumaron'in Den synthetic polymer material such as a resin; dioctyl phthalate, dioctyl adipate, and ester type softener such as dioctyl sebacate and the like; microcrystalline wax, liquid polybutadiene, modified liquid polybutadiene, liquid Thiokol, hydrocarbon-based synthetic lubricating oil, tall oils, and the like sub (factice). Among them, preferably petroleum softener, particularly process oil, paraffin oil are preferred among them. Softener may also be used in alone or in admixture.
[0053]
　As described later, in the present invention, be used in conjunction with this (C) softening material, we believe is important as the present inventors to achieve a high degree of vibration damping property.
[0054]
　(C) the content of the softening material, the copolymer (A) 5 ~ 300 parts by weight per 100 parts by weight, preferably 10-250 parts by weight, more preferably 20 to 230 parts by weight.
[0055]
　A ratio of the weight of the (C) softener for later of (D) a reinforcing filler ((C) / (D)) is 0.3 to 1.5, preferably 0.4-1 .4, more preferably from 0.5 to 1.3. When the content ratio ((C) / (D)) is within this range, it is possible from the composition to obtain a crosslinked product of high hardness.
[0056]
(D) a reinforcing filler
　as the (D) a reinforcing filler, specifically, and "Asahi # 55G" commercially available "Asahi # 50HG" (trade name: Asahi Carbon Co., Ltd.), "SEAST (trade name) "series: SRF, GPF, FEF, MAF , HAF, ISAF, SAF, FT, carbon black (Tokai carbon Co., Ltd.) such as MT, which was surface-treated with these carbon black with a silane coupling agent or the like , it can be used mica, talc, silica and clay. Of these, "Asahi # 60G", "Asahi # 80", carbon black of "SEAST HAF" is preferable.
[0057]
　(D) the content of the reinforcing filler, the copolymer (A) 10 ~ 300 parts by weight per 100 parts by weight, preferably from 20 to 280 parts by weight, more preferably 30 to 260 parts by weight.
(E) a vulcanizing agent
　as the (E) a vulcanizing agent (crosslinking agent) can sulfur, sulfur compounds, organic peroxides, phenolic resins, the use of oxime compounds.
[0058]
　As the sulfur-based compounds, sulfur chloride, sulfur dichloride, morpholine disulfide, alkylphenol disulfide, tetramethylthiuram disulfide, selenium dithiocarbamate and the like. Among the sulfur and sulfur-based compounds, sulfur, tetramethylthiuram disulfide are preferable.
[0059]
　Examples of the organic peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (benzoyl peroxy) hexane, 2, 5-diethyl-2,5-di (t-butylperoxy) hexyne-3, di -t- butyl peroxide, di -t- butyl peroxy-3,3,5-trimethylcyclohexane, exemplified t-dibutyl hydroperoxide, etc. it can. Of these, dicumyl peroxide, di -t- butyl peroxide, di -t- butyl peroxy-3,3,5-trimethylcyclohexane are preferable.
[0060]
　(E) content of the vulcanizing agent per 100 parts by mass of the copolymer (A), is 0.1 to 10 parts by weight, preferably from 0.3 to 9.0 parts by weight, more preferably 0 a .5 to 8.0 parts by weight.
[0061]
　The composition, in addition to the (A) ~ (E) component, within a range that does not impair the object of the present invention, vulcanization accelerators, vulcanization aids, fillers other than reinforcing fillers, processing aids agents, active agents, and may contain a hygroscopic agent.
[0062]
　When the composition contains a sulfur-based compound as a vulcanizing agent, the combination of the vulcanization accelerator is preferable. As the vulcanization accelerator, N- cyclohexyl-2-benzothiazole sulfenamide, N- oxydiethylene-2-benzothiazole sulfenamide, N, N'-diisopropyl-2-benzothiazole sulfenamide, 2-mercapto benzothiazole (e.g., "Sanceler M" (trade name, available from Sanshin Chemical Industry Co., Ltd.), etc.), 2- (4-morpholinodithio) Penzochiazoru (e.g., "Nocceler MDB-P" (trade name: Sanshin chemical Co., Ltd.), etc.), 2- (2,4-dinitrophenyl) mercaptobenzothiazole, 2- (2,6-diethyl-4-morpholinophenyl) benzothiazole, thiazole type such as dibenzothiazyl disulfide; diphenyl guanidine, triphenyl guanidine, guar and di-ortho-tolyl guanidine Blurred systems; Acetaldehyde - aniline condensate, butyraldehyde - aniline condensation product, aldehyde amine; 2-mercapto imidazoline such imidazoline of diethyl thiourea, thiourea etc. dibutyl thiourea; tetramethylthiuram monosulfide, tetramethylthiuram disulfide, etc. thiuram-based; zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate (for example, "Sanceler PZ" (trade name, available from Sanshin Chemical Industry Co., Ltd.), "Sanceler BZ" (trade name: available from Sanshin Chemical Industry etc., Ltd.), Ltd.), dithio acid salt-based tellurium diethyldithiocarbamate and the like; ethylene thiourea (e.g., "Sanceler BUR" (trade name, available from Sanshin Chemical Industry Co., Ltd.), "Sanceler 22-C" (trade name: New Chemical Industry Co., Ltd.) and the like), N, N'- diethyl thiourea such as thiourea system; xanthate system such as dibutyl Kisato Gen acid zinc; other zinc white (for example, "META-Z102" (trade name: Inoue Lime Industry Co., Ltd.), and the zinc oxide), or the like, such as.
[0063]
　The content of these vulcanization accelerators with respect to 100 parts by weight of the copolymer (A), 0.1 ~ 20 parts by weight, preferably 0.2 to 15 parts by weight, more preferably 0.5 to 10 is parts by weight.
[0064]
　It may further contain a vulcanizing agent. Specific examples of the vulcanizing agent, magnesium oxide, zinc oxide (for example, "META-Z102" (trade name: Inoue, zinc oxide, such as lime Kogyo Co., Ltd.)), and the like. The vulcanizing agent, p- quinone dioxime such as quinone dioxime of, ethylene glycol dimethacrylate, acrylic such as trimethylolpropane trimethacrylate; diallyl phthalate, allyl-based, such as triallyl isocyanurate; Other maleimide; divinyl benzene. Vulcanization agents may also be used as a mixture of two or more kinds in combination. The content of the vulcanizing agent is usually copolymer (A) 1 ~ 20 parts by weight per 100 parts by weight.
[0065]
　As the filler other than the reinforcing fillers can be used precipitated calcium carbonate, heavy calcium carbonate, talc, clay and the like. Among these, heavy calcium carbonate is preferred. As heavy calcium carbonate, which is commercially available, "Whiton SB": it is possible to use (trade name Shiraishi Calcium Co., Ltd.), and the like. The content of the filler, the copolymer (A) usually 30 to 300 parts by weight per 100 parts by weight, preferably 50-250 parts by weight, more preferably 70-230 parts by weight.
[0066]
　The processing aid can generally be widely used those to be blended in the rubber as a processing aid. Specifically, ricinoleic acid, stearic acid, palmitic acid, lauric acid, barium stearate, zinc stearate, calcium or esters stearate. Of these, stearic acid is preferred. Processing aids, copolymer (A) 10 parts by weight per 100 parts by weight or less, preferably 8.0 parts by mass or less, more preferably may be appropriately blended in an amount of less than 5.0 parts by weight.
[0067]
　Specific examples of active agents, di -n- butylamine, dicyclohexylamine, mono gills Nord amine, "Akuchingu B" (trade name: Yoshitomi, Ltd. Pharmaceutical Co., Ltd.), "Akuchingu SL" (trade name: Yoshitomi Pharmaceutical Co., Ltd. Ltd.) amines such as diethylene glycol, polyethylene glycol (e.g., "PEG # 4000" (manufactured by Lion Corporation)), lecithin, triallyl rate trimellitate, aliphatic and zinc compound of an aromatic carboxylic acid (e.g., "Struktol Activator 73 "," Struktol IB 531 "and" Struktol FA541 "(trade name: Schill & Seilacher Co., Ltd.)) active agents, such as;" ZEONET ZP "(trade name: manufactured by Nippon Zeon Co., Ltd.) zinc peroxide preparations, such as ; octadecyl birds Chill ammonium bromide, synthetic hydrotalcite, special quaternary ammonium compounds (for example, "Arquad 2HF" (trade name: manufactured by Lion Akzo Co., Ltd.)), and the like. Of these, polyethylene glycol (e.g., "PEG # 4000" (manufactured by Lion Corporation)), "Arquad 2HF" is preferable. Active agents may be used even alone or in admixture.
[0068]
　The amount of active agent, the copolymer (A) 0.2 ~ 10 parts by weight per 100 parts by weight, preferably 0.3 to 5 parts by mass, more preferably 0.5 to 4 parts by weight.
[0069]
　Specific examples of the moisture absorbent, calcium oxide, silica gel, sodium sulfate, molecular sieves, zeolites, white carbon, and the like. Of these, calcium oxide is preferable. Desiccant can be used even alone or in admixture. The content of the moisture absorbent, copolymer (A) 0.5 ~ 15 parts by weight per 100 parts by weight, preferably 1.0 to 12 parts, more preferably 1.0 to 10 parts by weight.

　The composition is obtained by kneading the (A) ~ (E) component and other components added as necessary.
[0070]
　Crosslinked product of the present invention is obtained by crosslinking the composition. For example, the (A) was prepared ~ (E) component and a composition by kneading other components, after sheeted the composition into a sheet, at 140 ~ 230 ° C. using a heating press, 2-30 olefin polymer crosslinked body is obtained by heating minutes. Wherein preferably 0.99 ° C. The lower limit temperature of the temperature range, more preferably 160 ° C., preferably 220 ° C. as the upper limit temperature, more preferably 200 ° C..
[0071]
　Raw material composition is not crosslinked, it would be easily deformed by external stress, and so can not return to its original shape, not suitable for practical use as a molding material. Crosslinked body obtained by crosslinking the composition has high utility as a molding material. Estimated to be a cross-linked body, tensile stress at break is that beyond the 5MPa. If the tensile stress at break exceeds the 5 MPa, removal from the mold, the product mounting, is considered to no practical problem for long-term use.
[0072]

　durometer hardness (value immediately measurement) of the crosslinked product of the present invention is 50-80, preferably 55-78, more preferably 58-75. Crosslinked product of the present invention has a high hardness of durometer hardness (the value immediately after the measurement) from 50 to 80 because it is formed from a composition having the above composition. For durometer method of measuring the hardness (value immediately measured) it was described in detail in the examples. If durometer hardness (the value immediately after the measurement) is more than 50, excellent handling property for sticking by the surface tackiness of the crosslinked bodies is reduced, further, it can be used in high load applications. On the other hand, if the durometer hardness (the value immediately after the measurement) is more than 80, impact resilience is increased, shock absorption tends to decrease.
[0073]
　No particular limitation is imposed on the durometer hardness (the value after the measurement 15 seconds), the crosslinked product of the present invention, the durometer hardness (the value immediately after the measurement) and durometer hardness (the value after the measurement 15 seconds) and the difference is 7 or more it exhibits excellent conformity to irregularity may be in close contact well to the substrate, the damping property, impact absorption, preferred because it can maximize the functionality of the vibration absorption is.
[0074]

　In the crosslinked product of the present invention, 1Hz, 0.5%, - 70 to measure the temperature dependency of the dynamic viscoelasticity under the conditions of ~ 100 ° C. and heating rate 4 ° C. / min temperature profile of the resulting tan [delta represents a bimodal, it is preferable to satisfy the peak following requirements (1) and (2) of the tan [delta, it is preferable to further satisfy the requirement (3).
[0075]
　(1) peak on the low temperature side is -50 ° C. or higher, present in a temperature range of less than -10 ° C..
　(2) peak on the high temperature side is present in a temperature range of -10 ~ 40 ° C..
　(3) [- 10 ℃ ~ 40 value of tanδ in peaks present in a temperature range of ℃] ≧ [-50 ℃ above, the value of tanδ in peaks present in a temperature range of less than -10 ° C.]
　temperature profile of the tanδ There showed a bimodal, by the peak of the tanδ meets the requirements (1) and (2), can realize a high hardness and low rebound resilience, by satisfying the requirements (3) and (2), further it can realize high hardness and low rebound resilience.
[0076]

　crosslinked product of the present invention is a high hardness, and low rebound resilience. That is, the high hardness and low rebound resilience is achieved. In particular a low rebound resilience is compatible, such as high hardness such as durometer 50-80 resilience of 20% or less.
[0077]
　Although this reason is not clear to show the effect, the present inventors have guessed as follows. The only been used in combination with component (A) and the component (B), it is considered to inhibit the function of components (A) and (B) the other component ingredients with each other. In contrast, when an appropriate amount of (C) softening material coexist, (C) moderately dispersed the softening material (A) and component wherein the component (B), by crosslinking in this state, the crosslinked product the dispersion state is maintained properly. By can be realized such specific dispersion state, the crosslinked product of the present invention speculate that was probably be compatible with the high hardness and low rebound resilience of the.
[0078]
　Therefore, it is possible to obtain a variety of products and high hardness and low rebound resilience is both a crosslinked body of the present invention. As the product, it may be mentioned vibration damping member, shock absorbers, vibration absorber, the resonance suppression material or the like. Crosslinked product of the present invention, automobile, railroad, aircraft, electrical and electronic equipment, the damping of various precision equipment is requested, be suitably used in the fields required particularly both high hardness and low rebound resilience it can.
[0079]
　The molding of various products, injection molding, various extrusion molding, compression molding, may be a known molding method such as calendar molding, vacuum forming.
[0080]
　Further, at the time of molding using chemical foaming agent, or a physical blowing agent is foamed by known methods, it can also be obtained foamed molded product. Blowing agents can be used known chemical blowing agents, or carbon dioxide gas, nitrogen gas, the known physical blowing agents such as water.
Example
[0081]
　Hereinafter, a more detailed description of the present invention based on examples, the present invention is not limited to these examples. Figures for components in the table below shows the parts by weight.
(Compounded material)
　blended materials used in the examples and comparative examples are as follows.
Ethylene-alpha-olefin-nonconjugated polyene copolymer peak of tanδ obtained by A) a dynamic viscoelasticity measurement is present one or more temperature range of ~ -30 ° C. -50
　(A) A-1) EPDM (trade name: Mitsui EPT 3110M (manufactured by Mitsui Chemicals, Inc.), the structural unit content derived from ethylene: 56% by mass, a structural unit content derived from 5-ethylidene-2-norbornene (ENB): 5.0 wt%, a Mooney viscosity [ML1 + 4 (125 ℃) ]: 78, tanδ-Tg: -38 ℃, tanδ maximum:
　1.0) A-2) EPDM (trade name: Mitsui EPT 9090M (manufactured by Mitsui Chemicals (Co. ) Ltd.), structural unit content derived from ethylene: 41% by mass, a structural unit content derived from 5-ethylidene-2-norbornene (ENB): 14 wt%, a Mooney viscosity [ML1 + 4 (1 5 ℃)]: 58, tanδ -Tg: -32 ℃, tanδ maximum:
1.8) B) present one or more temperature range of peak 0 ~ 40 ° C. of tan [delta determined by dynamic viscoelasticity measurement olefin copolymer
　(B) B-1) obtained by the following polymerization example 1 4-methyl-1-pentene · alpha-olefin polymers
[0082]
　[Polymerization Example 1]
　sufficiently purged with nitrogen 1.5 liter capacity stirred winged a SUS autoclave, n-hexane 300ml at 23 ° C. (dry nitrogen atmosphere, which was dried over activated alumina), 4-methyl-1-pentene He was charged with 450ml. Into the autoclave, a 1.0 mmol / ml toluene solution of triisobutyl aluminum (TIBAL) was 0.75ml charged, it turned stirrer.
[0083]
　Then, the autoclave was heated to an internal temperature of 60 ° C., the total pressure was pressurized with propylene so that 0.40 MPa (gauge pressure). Then, previously prepared, 1mmol in terms of Al methylaluminoxane, diphenylmethylene (1-ethyl -3-t-butyl - cyclopentadienyl) (2,7-di -t- butyl - fluorenyl) zirconium the toluene solution 0.34ml containing 0.01mmol dichloride was pressed into the autoclave with nitrogen to initiate polymerization. During the polymerization reaction, the temperature was adjusted to the autoclave internal temperature is 60 ° C.. After the polymerization After 60 minutes, the autoclave methanol 5ml to stop the polymerization was pressed with nitrogen, it was depressurized autoclave to atmospheric pressure. It poured with stirring acetone to the reaction solution.
[0084]
　100 ° C. The powdered polymer containing the resulting solvent was dried under reduced pressure for 12 hours. The obtained polymer was 36.9 g, the structural unit content derived from 4-methyl-1-pentene in the polymer is 72 mol%, structural unit content derived from propylene was 28 mol%. The weight average molecular weight measured by gel permeation chromatography (GPC) (Mw) is 337,000, tanδ-Tg is 28 ° C., tan [delta maximum value was 2.4.
[0085]
C) softener
　C-1) Paraffin Oil: manufactured (trade name Diana Process Oil PS-430 (Idemitsu Kosan
　(Ltd.))) C-2) paraffin oil (trade name: Diana Process Oil PW-90 (Idemitsu Kosan (strain ) Co., Ltd.))
[0086]
D) a reinforcing
　filler: D-1) carbon black (trade name: Asahi # 60G (Asahi Carbon Co.,
　Ltd.)) D-2) carbon black (trade name: Asahi # 80 (manufactured by Asahi Carbon Co., Ltd.) )
[0087]
E) vulcanizing
　agent: E-1) Sulfur: manufactured (trade name alpha Gran S-50EN (AzumaTomo Co.,
　Ltd.)) E-2) dicumyl peroxide (trade name: Percumil D-40 (NOF Co., Ltd. Ltd.))
[0088]
F) filler
　calcium carbonate (trade name: Silver-W (manufactured by Shiraishi Calcium
Co.) G) vulcanizing agent
　active zinc white (trade name: manufactured by META-Z102 (Inoue Lime Industry Co.))
[0089]
H) processing aid
　H-1) stearic acid (trade name: stearate powder Sakura (manufactured by NOF CORPORATION))
　H-2) fatty acid ester (trade name: Struktol WB212 (Esuandoesu manufactured by Japan KK))
I) active agent
　polyethylene glycol (trade name: PEG # 4000 (Lion Co., Ltd.))
[0090]
J) a vulcanization accelerator
　J-1) sulfenamide vulcanization accelerator: N- cyclohexyl-2-benzothiazole sulfenamide (trade name: Sanceler CM (Sanshin Chemical Industry Co.,
　Ltd.)) J-2 ) dithiocarbamate-based vulcanization accelerator: zinc dibutyldithiocarbamate (trade name: Sanceler BZ (Sanshin Chemical Industry Co., Ltd.))
　J-3) thiuram vulcanization accelerator: tetramethyl thiuram disulfide (trade name: Sanceler TT (Sanshin Chemical Industry Co.,
　Ltd.)) J-4) thiuram vulcanization accelerator: dipentamethylenethiuram tetrasulfide manufactured by (trade name Sanceler TRA (Sanshin Chemical Industry Co.))
[0091]
(Measurement Method and Evaluation Method)
　In the following Examples and Comparative Examples, physical properties were measured or evaluated by the following methods.
a) dynamic viscoelasticity measurement
　using a viscoelasticity measuring apparatus ARES (TA Instrumens JAPAN Inc. Co.), was measured the temperature dependence of the viscosity of each sheet-like crosslinked samples by the following measurement conditions. The obtained measurement, '' ratio of (G and loss modulus (G) "/ G storage modulus (G) ': loss tangent) was used as a tan [delta. is plotted against temperature tan [delta, curve or peak of the projections are obtained above the temperature at the top of the peak glass transition temperature, that is, tan [delta-Tg, was measured a maximum value at that temperature. If two or more peaks per tan [delta was observed was recorded both tan [delta-Tg and the maximum value as the first and second peaks.
[0092]
　　(Measurement
　　conditions) Frequency:
　　1.0Hz Temperature: -70 ~ 80 deg.] C
　　the Ramp Rate: 4.0 deg.] C / min
　　Strain: 0.5%
[0093]
b) hardness measurement
　punched sheet crosslinked samples, a sample for hardness measurement by stacking three this crosslinked body was tested. JIS K6253 (2006) - was measured at to 23 ° C. compliant description of the test type A "durometer hardness test" of Section 6, "Rubber, vulcanized or thermoplastic Determination of hardness". The hardness of 15 seconds after immediately and contact time and the pressure plate is brought into contact with the test piece was measured. The hardness obtained immediately after contacted "durometer hardness (the value immediately after the measurement)", and the hardness obtained from the time of contact after 15 seconds as "durometer hardness (the value after the measurement 15 seconds)".
[0094]
c) impact resilience measured
　for cylindrical cross-linked samples, in conformity with the description of JIS K6255 (1996) of 4 of the "rebound resilience test method of vulcanized rubber and thermoplastic rubber" "Lubke formula resilience test", 23 ℃ in was measured to determine the impact resilience (%). The results obtained were evaluated resilience according to the following criteria.
[0095]
　A: impact resilience is 0-20%.
　B: impact resilience is 21 to 25%.
　C: larger rebound resilience of 25%.
[0096]
d) a tensile stress at break (T B ) and tensile elongation at break (E B ) measured
　punched sheet crosslinked samples were prepared type No. 3 dumbbell test piece described in JIS K 6251 (2001). According to the method prescribed in JIS K 6251 using a test piece, a measurement temperature of 23 ° C., a tensile subjected to a tensile test at a rate of 500 mm / min condition, tensile stress at break (T B ) and tensile elongation at break (E B ) were measured.
[0097]
e) Measurement of specific gravity
　punched sheet crosslinked samples, was used as a sample for measurement of specific gravity. For this sample, automatic hydrometer under 25 ° C. Atmosphere: was gravity measurements from the difference in mass between in air and pure water using the (Toyo Seiki Seisakusho M-1 type).
[0098]
[Example
　1] MIXTRON BB MIXER using (Kobe Steel, Ltd. Co., BB-4 type, volume 2.95L, rotor 4WH), the filling rate of 70%, into conventional method (total mixing time 5 minutes) ethylene-alpha-olefin-nonconjugated polyene copolymer Te (A-1) 100 parts by weight (430 g), olefin copolymer (B-1) 50 parts by weight (215 g), softener (C-1) 145 parts by weight (625 g), a reinforcing filler (D-1) 215 parts by weight (925 g), filler (F) 28 parts by mass (120 g), vulcanization aids (G) 5 parts by weight (22 g), processing aids agent (H-1) 2 parts by mass (9 g), processing aids (H-2) 2 parts by mass (9 g), the active agent (I) 1 part by mass (4g) was kneaded. Kneading rotor speed is 50 rpm, the floating weight pressure of 3 kg / cm 2 , kneading discharge temperature was 138 ° C..
[0099]
　Then, after confirming that the formulation becomes a temperature 40 ° C. or less, in the formulation of 2,192G, using an 8-inch two-roll kneader, a vulcanization accelerator (J-1) 1. 5 parts by weight (6 g), a vulcanization accelerator (J-2) 1.0 parts by weight (4g), vulcanization accelerator (J-3) 0.5 parts by weight (2 g), vulcanization accelerator (J- 4) 0.5 parts by weight (2 g), was added a vulcanizing agent (E-1) 0.8 part by weight (3.2 g), and kneaded. Kneading conditions, the rear front roll / roll temperature roll: 70 ° C. / 70 ° C., the rotational speed 12.5rpm the front roll was set to the rotation speed 10.4rpm of the rear roll. After sheeted into a sheet, by vulcanizing by heating 10 minutes at 160 ° C. using a heating press, to obtain a vulcanized sheet (press sheet) having a thickness of 2 mm.
[0100]
　The vulcanized sheet performs crosslinked as follows in correspondence with the respective measuring methods, to prepare a crosslinked sample. This crosslinked sample was determined physical property values ​​according to the above measuring method. The results are shown in Table 1.
[0101]
　Dynamic viscoelasticity measurement, hardness measurement, tensile stress at break (T B ) and tensile elongation at break (E B For) measurement and density measurement, using a 50T electric press manufactured by Kotaki Corporation, the vulcanized sheet It performed 10 minutes crosslinking at 160 ° C., to produce a sheet-like crosslinked sample thickness 2 mm.
[0102]
　The resilience measurement, using Kotaki Co. 50T heating press, the perform 13 minutes crosslink at vulcanization sheet 160 ° C., a thickness of 12 mm, to prepare a cylindrical cross-linked samples of diameter 29 mm.
[0103]
[Examples 2 to 16]
　The composition of the A-E component, Example 2 in Table 1 for 1-9, Examples 10 About 16 except for changing the blending composition as shown in Table 2 Example 1 and to prepare a vulcanized sheet under the same conditions to determine the physical properties in the same manner as in example 1. However, in Example 16, without using the vulcanization accelerator (J-1) ~ (J -4), instead of the vulcanizing agent (E-1), vulcanizing agent (E-2) 8.0 to prepare a vulcanized sheet using parts by mass (32 g). In Example 16, a dynamic viscoelasticity measurement, hardness measurement, tensile stress at break (T B ) and tensile elongation at break (E B For) measurement and density measurement, except that the crosslinking time of 20 minutes to prepare a sheet-shaped crosslinked samples similarly thickness 2mm example 1, for the resilience measurement, similarly 12mm thick, except that the crosslinking time of 25 minutes as in example 1, a cylindrical cross-linking of diameter 29mm the body sample was prepared. The results of Examples 2-9 in Table 1 shows the results of Examples 10-16 in Table 2.
[0104]
[Comparative Examples 1-11]
　, except that the composition of the A ~ E components were changed to the composition of the as shown in Table 3 to prepare a vulcanized sheet under the same conditions as in Example 1, similarly physical properties as in Example 1 I was asked. The results of Comparative Examples 1 to 11 shown in Table 3.
[0105]
　Especially if you look at the results of Comparative Example 11 Example, it is found to have a significant effect on both the (C) softening material high hardness and low rebound resilience.
[0106]
[Table 1]

[0107]
[Table 2]

[0108]
[Table 3]

　As shown in Table 1-3, a crosslinked body of rubber according to the present exemplary embodiment, as compared with the crosslinked rubber body shown in Comparative Examples, the durometer hardness of 50 or more relatively stiff characteristics and low rebound resilience it can be seen that both the door. Comparative Examples 1-9, 0 because between ~ 40 ° C. does not contain olefin copolymer having a peak of tan [delta, does not reach the target value of impact resilience of 20% or less. In Comparative Example 10, 0 olefin copolymer between ~ 40 ° C. with a peak of tan [delta (B) is included, but the compounded part of the olefin-based copolymer (B), copolymer ( because a) 100 parts by mass is 50 mass or less, it does not reach the target value of the impact resilience. Crosslinked rubber according to the present exemplary embodiment, because it is composed of EPDM, and the olefin polymer is a non-conjugated diene rubber, weather resistance, the wet heat resistance can be expected. In addition, tensile test at sought tensile stress at break (T B ) and tensile elongation at break (E B is excellent), further indicating a specific gravity 1.18 and light weight.
[0109]
　Equipment crosslinked product of the present invention is, with the fact that having such a feature, automobile, railway, mobility areas such as aircraft, shoes, sporting goods fields such as tennis rackets, machine, rock drilling machine, the vibration such as impact wrench in such areas, the vibration absorbing member toward like holding grips, shock absorbers, industrial application is expected as damping material.

The scope of the claims
[Claim 1]
　(A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ -30 ° C. -50
　(B) moving specific olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by viscoelasticity measurement is present one or more temperature range of 0 ~ 40 ° C.
　(C) softener 5 to 300 parts by weight
　(D) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　wherein the said (D) content of mass of relative reinforcing filler (C) softener (( C) / (D)) is the composition of 0.3 to 1.5.
[Claim 2]
　(A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ -30 ° C. -50
　(B) moving specific olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by viscoelasticity measurement is present one or more temperature range of 0 ~ 40 ° C.
　(C) softener 5 to 300 parts by weight
　(D) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by mass
　comprises, (D) the relative reinforcing filler (C) content of weight of the softener (( C) / (D)) is obtained by crosslinking the composition is 0.3 to 1.5, crosslinked durometer hardness (the value immediately after the measurement) is 50 to 80.
[Claim 3]
　1 Hz, 0.5%, - 70 Temperature profile of ~ 100 ° C. and heating rate 4 ° C. / min tan [delta obtained by measuring the temperature dependence of dynamic viscoelasticity under the conditions of showed a bimodal, further , crosslinked body according to claim 2 in which peaks of the tanδ satisfies the following requirements.
　(1) peak on the low temperature side is -50 ° C. or higher, present in a temperature range of less than -10 ° C..
　(2) peak on the high temperature side is present in a temperature range of -10 ~ 40 ° C..
[Claim 4]
　Further crosslinked body according to claim 3, satisfying the following requirements (3).
　(3) [- 10 ℃ ~ 40 value of tanδ in peaks present in a temperature range of ℃] ≧ [-50 ℃ above, the value of tanδ in peaks present in a temperature range of less than -10 ° C.]
[Claim 5]
　(B) the olefin
　copolymer, 4-methyl-1 content ratio of 16 to 95 mol% of constituent units derived from pentene (i), of carbon atoms 2 ~ 20 alpha-olefin (4-methyl -1-content ratio 5-84 mol% of at least one of constituent units derived from α- olefin selected from excluding pentene) (ii), the content ratio of constituent units derived from nonconjugated polyene (iii) is 0-10 mol% (provided that the structural units (i), (ii) and (a total of iii) is 100 mol%) of a (B1) 4-methyl-1-pentene · alpha-olefin copolymer including, crosslinked body according to any one of claims 2-4.
[Claim 6]
　Wherein (D) a reinforcing filler is carbon black, is at least one selected mica, talc, silica and clay, crosslinked body according to any one of claims 2-5.
[Claim 7]
　Wherein (C) softening material is a paraffin oil, crosslinked body according to any one of claims 2-6.
[8.]
　Vibration damping member obtained using the crosslinked body according to any of claims 2-7.
[Claim 9]
　Shock absorber obtained by using the crosslinked body according to any one of claims 2-7.
[Claim 10]
　Vibration absorbing material obtained by using the crosslinked body according to any one of claims 2-7.
[Claim 11]
　Resonance suppression material obtained by using the crosslinked body according to any one of claims 2-7.
[Claim 12]
　(A) an ethylene-alpha-olefin-nonconjugated polyene copolymer 100 parts by weight of a peak of tanδ obtained by dynamic viscoelasticity measurement is present one or more temperature range of ~ -30 ° C. -50
　(B) moving specific olefin-based copolymer 50 to 500 parts by weight of a peak of tanδ obtained by viscoelasticity measurement is present one or more temperature range of 0 ~ 40 ° C.
　(C) softener 5 to 300 parts by weight
　(D) reinforcing filler 10 to 300 parts by mass,
　and, (E) a vulcanizing agent 0.1 part by weight to 10 parts by weight
　wherein the said (D) the relative reinforcing filler (C) blending ratio of weight of the softener ( (C) / (D)) is process for producing an olefin polymer crosslinked body characterized by reacting the composition is 0.3-1.5 under conditions of 140 ~ 230 ° C..