JP4423845B2 - Vibration damping elastomer composition - Google Patents
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- JP4423845B2 JP4423845B2 JP2002293920A JP2002293920A JP4423845B2 JP 4423845 B2 JP4423845 B2 JP 4423845B2 JP 2002293920 A JP2002293920 A JP 2002293920A JP 2002293920 A JP2002293920 A JP 2002293920A JP 4423845 B2 JP4423845 B2 JP 4423845B2
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Description
【０００１】
【発明が属する技術分野】
本発明は、振動減衰エラストマー組成物に関し、詳しくは、温度依存性が小さい振動減衰エラストマー組成物に関する。
【０００２】
【従来の技術】
建築分野においては、地震などの突発的な振動や台風などの風力による振動の揺れを吸収して建築物に制振性を付与する振動エネルギー吸収装置が開発されている。振動エネルギー吸収装置としては、例えば、ビル等の建築物の壁に使用される制震壁、ブレースダンパ等が挙げられる。その様な装置に使用されるエネルギ吸収材は、高い減衰性と共に０〜４０℃の温度範囲での温度依存性が小さいことが要求される。
【０００３】
エネルギ吸収材として、アスファルト、熱可塑性ゴム及び粘着付与剤から成るアスファルト系振動減衰材料が例示されている（特許文献１参照）。しかしながら、アスファルトを主材料とした振動減衰材料は、０〜４０℃の温度範囲で減衰力の温度依存性が大きい。特に、低温領域（０℃附近）では急激に固くなるため、必要以上に大きな減衰力が生じ、また、粘着性も失われる。他方、高温領域（４０℃付近）では、減衰力が小さくなる。そのため、広範囲な温度領域で安定した減衰性能を得ることが出来ず、エネルギ吸収装置を設計する上で大きな問題となる。また、主材料のアスファルトは二重結合等の官能基を持つことから、長期間の安定性にも問題がある。
【０００４】
【特許文献１】
特許第２６０７３８３号公報
【０００５】
【発明が解決しようとする課題】
本発明は、上記実情に鑑みてなされたものであり、その目的は、温度依存性が小さい振動減衰エラストマー組成物を提供することにある。
【０００６】
【課題を解決するための手段】
すなわち、本発明の要旨は、スチレン−エチレン−プロピレン−スチレントリブロック共重合体３５〜６０重量％と粘着付与剤２０〜４０重量％とポリイソブチレン１０〜３５重量％とから成ることを特徴とする振動減衰エラストマー組成物に存する。
【０００７】
【発明の実施の形態】
以下、本発明を詳細に説明する。本発明においては、主成分としてスチレン−エチレン−プロピレン−スチレントリブロック共重合体を使用し、配合成分として粘着付与剤およびポリイソブチレンを使用する。
【０００８】
上記のスチレン−エチレン−プロピレン−スチレントリブロック共重合体としては、ハードセグメントにポリスチレンを、ソフトセグメントにポリイソプレンを使用したトリブロック共重合体で、具体的には、スチレン−イソプレン−スチレントリブロック共重合体（ＳＩＳ）を水素添加したスチレン−エチレン−プロピレン−スチレントリブロック共重合体（ＳＥＰＳ）が挙げられる。このスチレン−エチレン−プロピレン−スチレントリブロック共重合体におけるハードセグメントとソフトセグメントの重量比は、通常ハードセグメント／ソフトセグメント＝１３〜３５／８７〜６５（スチレン含有量が通常１３〜３５重量％）の範囲である。特に、ハードセグメントとソフトセグメントの重量比が２０／８０（スチレン含有量が２０重量％）で、引張破断強度が３．１ＭＰａ、引張破断伸度が７８０％、溶融粘度が２６ｍＰａ・ｓのスチレン−エチレン−プロピレン−スチレントリブロック共重合体が好ましい。スチレン−エチレン−プロピレン−スチレントリブロック共重合体の配合量は、３５〜６０重量％、好ましくは４０〜５５重量％である。
【０００９】
上記の粘着付与剤は、スチレン−エチレン−プロピレン−スチレントリブロック共重合体に振動減衰性と粘着性とを付与する。当該粘着付与剤としては、軟化点が通常６０〜１５０℃の低分子量の樹脂が挙げられ、例えば、ロジン、ロジン誘導体、テルペン樹脂、芳香族変性テルペン樹脂、テルペンフェノール樹脂、クロマン・インデン樹脂、脂肪族系石油樹脂、脂環族系石油樹脂、脂肪族芳香族共重合系石油樹脂、これらの水素添加物などが例示される。特に、軟化点が１３５℃のジシクロペンタジエン系石油樹脂の水素添加物または軟化点が１００〜１４０℃のテルペン樹脂の水素添加物が好ましい。
【００１０】
粘着付与剤の配合量は２０〜４０重量％である。配合量が２０重量％未満の場合は、スチレン−エチレン−プロピレン−スチレントリブロック共重合体に充分な振動減衰性と粘着性とを付与することが困難である。また、４０重量％を超える場合は、温度依存性に悪影響を与える。特に、低温領域（０℃附近）で必要以上に大きな減衰力が生じる。
【００１１】
上記のポリイソブチレンは、軟化剤としての作用を有し、特に、振動減衰エラストマー組成物が低温領域（０℃附近）で固くなるのを防止すると共に粘着性を保持する。ポリイソブチレンとしては、数平均分子量が１，０００〜４，０００の低分子量ポリイソブチレンおよび粘度平均分子量が２０，０００〜７０，０００の中分子量ポリイソブチレンが挙げられ、単独または混合物として使用される。ポリイソブチレンの配合量は１０〜３５重量％である。配合量が１０重量％未満の場合は、低温領域で振動減衰エラストマー組成物が固くなり、必要以上に大きな減衰力が生じる。また、配合量が３５重量％を超えると振動減衰エラストマー組成物が軟らかくなり過ぎて、減衰力が小さくなる。
【００１２】
振動減衰エラストマー組成物は、例えば、ミキサー、混合ロール、ニーダー等の混練装置を使用し、上記の各成分を混練して製造する。振動減衰エラストマー組成物は、溶融温度以上に加熱して溶融し、所望の型枠内に流し込み、放冷して所望の形状に成形する。
【００１３】
本発明の振動減衰エラストマー組成物は、建築分野においては制震壁、制震ブレースダンパ等の制震装置に使用でき、また、機械装置の振動減衰ダンパ、衝撃吸収材、制振材等にも使用することが出来る。
【００１４】
【実施例】
以下、実施例により本発明を更に詳細に説明するが、本発明は、その要旨を超えない限り、以下の実施例に限定されるものではない。
【００１５】
実施例１
スチレン系熱可塑性エラストマーとしてのスチレン−エチレン−プロピレン−スチレントリブロック共重合体（ＳＥＰＳ）（クラレ社製の「セプトン（商品名）」）４９重量％と、粘着付与剤としての軟化点：１３５℃のジシクロペンタジエン系石油樹脂の水素添加物（トーネックス社製の「エスコレッツ（商品名）」）３２重量％と、軟化剤としての数平均分子量：１，３００のポリイソブチレン（ＢＡＳＦ社製の「ＧＬＩＳＳＯＰＡＬ１３００（商品名）」）１９重量％とを混練装置（ニーダー）に投入し、１７０℃の温度で６０分間均一に溶融混練し、得られた溶融混練物を装置から取出し放冷して振動減衰エラストマー組成物を得た。次いで、振動減衰エラストマー組成物を加熱プレス成形によりシート化し、得られたシートから直径８ｍｍ、厚さ１ｍｍの振動減衰エラストマー試験片を作製した。
【００１６】
実施例２
実施例１において、粘着付与剤を軟化点：１２５℃のテルペン樹脂の水素添加物（ヤスハラケミカル社製の「クリアロンＰ１２５（商品名）」）に、軟化剤を数平均分子量：１，０００のポリイソブチレン（ＢＡＳＦ社製の「ＧＬＩＳＳＯＰＡＬ１０００（商品名）」）に変更した以外は、実施例１と同様の方法で振動減衰エラストマー試験片を作製した。
【００１７】
実施例３
実施例１において、軟化剤を粘度平均分子量：３０，０００のポリイソブチレン（日本石油化学社製の「テトラックス３Ｔ（商品名）」）に変更した以外は、実施例１と同様の方法で振動減衰エラストマー試験片を作製した。
【００１８】
実施例４
スチレン系熱可塑性エラストマーとしてのスチレン−エチレン−プロピレン−スチレントリブロック共重合体（ＳＥＰＳ）（クラレ社製の「セプトン（商品名）」）４２重量％と、粘着付与剤としての軟化点：１３５℃のジシクロペンタジエン系石油樹脂の水素添加物（トーネックス社製の「エスコレッツ（商品名）」）２８重量％と、軟化剤としての数平均分子量：１，３００のポリイソブチレン（ＢＡＳＦ社製の「ＧＬＩＳＳＯＰＡＬ１３００（商品名）」）１６重量％と粘度平均分子量：４０，０００のポリイソブチレン（日本石油化学社製の「テトラックス４Ｔ（商品名）」）１４重量％とを混練装置（ニーダー）に投入し、１７０℃の温度で６０分間均一に溶融混練し、得られた溶融混練物を装置から取出し放冷して振動減衰エラストマー組成物を得た。次いで、振動減衰エラストマー組成物を加熱プレス成形によりシート化し、得られたシートから直径８ｍｍ、厚さ１ｍｍの振動減衰エラストマー試験片を作製した。
【００１９】
実施例５
スチレン系熱可塑性エラストマーとしてのスチレン−エチレン−プロピレン−スチレントリブロック共重合体（ＳＥＰＳ）（クラレ社製の「セプトン（商品名）」）４５重量％と、粘着付与剤としての軟化点：１３５℃のジシクロペンタジエン系石油樹脂の水素添加物（トーネックス社製の「エスコレッツ（商品名）」）３０重量％と、軟化剤としての数平均分子量：１，３００のポリイソブチレン（ＢＡＳＦ社製の「ＧＬＩＳＳＯＰＡＬ１３００（商品名）」）１０重量％と粘度平均分子量：３０，０００のポリイソブチレン（日本石油化学社製の「テトラックス３Ｔ（商品名）」）１５重量％とを混練装置（ニーダー）に投入し、１７０℃の温度で６０分間均一に溶融混練し、得られた溶融混練物を装置から取出し放冷して振動減衰エラストマー組成物を得た。次いで、振動減衰エラストマー組成物を加熱プレス成形によりシート化し、得られたシートから直径８ｍｍ、厚さ１ｍｍの振動減衰エラストマー試験片を作製した。
【００２０】
比較例
アスファルト６８重量％と、熱可塑性ゴムとしてのスチレンブロック共重合体２２重量％と、粘着付与剤としてのポリブテン１０重量％とを混練装置（ニーダー）に投入し、１８０℃の温度で均一に溶融混練し、得られた溶融混練物を装置から取出し放冷してアスファルト系減衰材を得た。次いで、アスファルト系減衰材を加熱プレス成形によりシート化し、得られたシートから直径８ｍｍ、厚さ１ｍｍのアスファルト系減衰材試験片を作製した。
【００２１】
上述した実施例１〜５で得た振動減衰エラストマー試験片および比較例で得たアスファルト系減衰材試験片について、０〜４０℃の温度における減衰力を測定した。評価方法は、Ｒｈｅｏｍｅｔｒｉｃ Ｓｃｉｅｎｔｉｆｉｃ社製の粘弾性測定装置を使用し、Ａｒｂｉｔｒａｒｙ Ｗａｖｅｓｈａｐｅ Ｔｅｓｔによって行なった。すなわち、２枚のプレート間に、直径８ｍｍ、厚さ１ｍｍの試験片を挟み、サーボモータにより、歪み１００％、周波数０．５Ｈｚのサイン波を、一方のプレートに１０秒間入力し、他方のプレートに連結したトルク測定装置によりトルクを測定し、歪み（％）とトルク（Ｐａ）の関係を示す履歴曲線を得た。実施例１の振動減衰エラストマー試験片の０℃における履歴曲線を図１に示す。得られた履歴曲線の面積（Ｐａ・％）を減衰力とした。履歴曲線の測定を０℃、２０℃および４０℃の温度で行い、各温度での履歴面積を得た。結果を表１及び図２に示す。
【００２２】
【表１】
表１及び図２から、実施例１〜５の振動減衰エラストマー組成物は、（ａ）０℃と２０℃の間の履歴面積比が２．８未満、（ｂ）２０℃と４０℃の間での履歴面積比が１．９未満、（ｃ）０℃と４０℃の間での履歴面積比が５．１未満であり、そして、０℃と４０℃の間での履歴面積比について比較例１と比較した場合、５．０８／３４．３２（１／６．８）〜２．７４／３４．３２（１／１２．５）と低く、従って、温度依存性が小さいと認められる。また、比較例のアスファルト系減衰材は、０℃と４０℃の間での履歴面積比が極めて大きく、温度依存性が非常に大きいことが認められる。
【００２４】
【発明の効果】
以上の様に、本発明の振動減衰エラストマー組成物は、０〜４０℃の温度においての温度依存性が小さく、減衰性に優れる。
【図面の簡単な説明】
【図１】実施例１の振動減衰エラストマー試験片の０℃における歪みとトルクの関係の履歴曲線
【図２】本発明の実施例と比較例の温度と履歴面積の関係を示すグラフ[0001]
[Technical field to which the invention belongs]
The present invention relates to a vibration-damping elastomer composition, and more particularly to a vibration-damping elastomer composition having a small temperature dependency.
[0002]
[Prior art]
In the building field, vibration energy absorbing devices have been developed that absorb sudden vibrations such as earthquakes and vibrations caused by wind power such as typhoons to impart damping properties to buildings. Examples of the vibration energy absorbing device include a vibration control wall and a brace damper used for a wall of a building such as a building. The energy absorbing material used in such an apparatus is required to have a low temperature dependency in a temperature range of 0 to 40 ° C. together with a high damping property.
[0003]
As an energy absorbing material, an asphalt vibration damping material made of asphalt, thermoplastic rubber, and a tackifier is exemplified (see Patent Document 1). However, a vibration damping material mainly composed of asphalt has a large temperature dependency of damping force in a temperature range of 0 to 40 ° C. In particular, since it hardens rapidly in the low temperature region (around 0 ° C.), an unnecessarily large damping force is generated, and adhesiveness is lost. On the other hand, in the high temperature region (around 40 ° C.), the damping force becomes small. For this reason, stable attenuation performance cannot be obtained in a wide temperature range, which is a serious problem in designing an energy absorbing device. In addition, asphalt as the main material has a functional group such as a double bond, there is a problem in long-term stability.
[0004]
[Patent Document 1]
Japanese Patent No. 2607383 [0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a vibration-damping elastomer composition having a small temperature dependency.
[0006]
[Means for Solving the Problems]
That is, the gist of the present invention is characterized by comprising 35 to 60% by weight of a styrene-ethylene-propylene-styrene triblock copolymer , 20 to 40% by weight of a tackifier, and 10 to 35% by weight of polyisobutylene. A vibration-damping elastomer composition.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail. In the present invention, a styrene-ethylene-propylene-styrene triblock copolymer is used as a main component, and a tackifier and polyisobutylene are used as blending components.
[0008]
The styrene-ethylene-propylene-styrene triblock copolymer is a triblock copolymer using polystyrene for the hard segment and polyisoprene for the soft segment, specifically, styrene-isoprene-styrene triblock. Examples thereof include a styrene-ethylene-propylene-styrene triblock copolymer (SEPS) obtained by hydrogenating a copolymer (SIS). The weight ratio of the hard segment to the soft segment in this styrene-ethylene-propylene-styrene triblock copolymer is usually hard segment / soft segment = 13 to 35/87 to 65 (styrene content is usually 13 to 35% by weight). Range. In particular, styrene having a weight ratio of hard segment to soft segment of 20/80 (styrene content of 20% by weight), a tensile breaking strength of 3.1 MPa, a tensile breaking elongation of 780%, and a melt viscosity of 26 mPa · s. An ethylene-propylene-styrene triblock copolymer is preferred. The blending amount of the styrene-ethylene-propylene-styrene triblock copolymer is 35 to 60% by weight, preferably 40 to 55% by weight.
[0009]
The tackifier described above imparts vibration damping properties and tackiness to the styrene-ethylene-propylene-styrene triblock copolymer . Examples of the tackifier include low molecular weight resins having a softening point of usually 60 to 150 ° C., for example, rosin, rosin derivatives, terpene resins, aromatic modified terpene resins, terpene phenol resins, chroman indene resins, fats Examples thereof include aliphatic petroleum resins, alicyclic petroleum resins, aliphatic aromatic copolymer petroleum resins, and hydrogenated products thereof. In particular, a hydrogenated product of a dicyclopentadiene petroleum resin having a softening point of 135 ° C. or a hydrogenated product of a terpene resin having a softening point of 100 to 140 ° C. is preferable.
[0010]
The compounding quantity of a tackifier is 20 to 40 weight%. When the blending amount is less than 20% by weight, it is difficult to impart sufficient vibration damping properties and tackiness to the styrene-ethylene-propylene-styrene triblock copolymer . On the other hand, if it exceeds 40% by weight, the temperature dependency is adversely affected. In particular, an unnecessarily large damping force is generated in a low temperature region (near 0 ° C.).
[0011]
The polyisobutylene has an action as a softening agent, and in particular, prevents the vibration-damping elastomer composition from becoming hard in a low temperature region (near 0 ° C.) and maintains adhesiveness. Examples of the polyisobutylene include low molecular weight polyisobutylene having a number average molecular weight of 1,000 to 4,000 and medium molecular weight polyisobutylene having a viscosity average molecular weight of 20,000 to 70,000, which are used alone or as a mixture. The blending amount of polyisobutylene is 10 to 35% by weight. When the blending amount is less than 10% by weight, the vibration damping elastomer composition becomes hard at a low temperature region, and a damping force larger than necessary is generated. On the other hand, when the blending amount exceeds 35% by weight, the vibration damping elastomer composition becomes too soft and the damping force becomes small.
[0012]
The vibration-damping elastomer composition is produced by kneading each of the above components using a kneading apparatus such as a mixer, a mixing roll, or a kneader. The vibration damping elastomer composition is heated to a melting temperature or higher, melted, poured into a desired mold, allowed to cool, and formed into a desired shape.
[0013]
The vibration damping elastomer composition of the present invention can be used in vibration control devices such as vibration control walls and vibration control brace dampers in the building field, and also in vibration attenuation dampers, shock absorbers, vibration control materials and the like of mechanical devices. Can be used.
[0014]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example, unless the summary is exceeded.
[0015]
Example 1
49% by weight of styrene-ethylene-propylene-styrene triblock copolymer (SEPS) (“Septon (trade name)” manufactured by Kuraray Co., Ltd.) as a styrenic thermoplastic elastomer, and softening point as a tackifier: 135 ° C. 32% by weight of a hydrogenated product of dicyclopentadiene petroleum resin (“Escollets (trade name)” manufactured by Tonex Co., Ltd.) and a polyisobutylene having a number average molecular weight of 1,300 as a softener (“GLISSSOPAL1300 manufactured by BASF”) (Trade name) ") 19% by weight is charged into a kneading apparatus (kneader), melted and kneaded uniformly at a temperature of 170 ° C. for 60 minutes, and the resulting melt-kneaded product is taken out from the apparatus and allowed to cool, and vibration damping elastomer A composition was obtained. Next, the vibration damping elastomer composition was formed into a sheet by hot press molding, and a vibration damping elastomer test piece having a diameter of 8 mm and a thickness of 1 mm was produced from the obtained sheet.
[0016]
Example 2
In Example 1, the tackifier was added to a hydrogenated terpene resin having a softening point of 125 ° C. (“Clearon P125 (trade name)” manufactured by Yasuhara Chemical Co., Ltd.), and the softener was polyisobutylene having a number average molecular weight of 1,000. A vibration-damping elastomer test piece was prepared in the same manner as in Example 1 except that it was changed to “GLISSSOPAL1000 (trade name)” manufactured by BASF.
[0017]
Example 3
In Example 1, the same procedure as in Example 1 was used except that the softener was changed to polyisobutylene having a viscosity average molecular weight of 30,000 (“Tetrax 3T (trade name)” manufactured by Nippon Petrochemical Co., Ltd.). A damping elastomer specimen was prepared.
[0018]
Example 4
42% by weight of a styrene-ethylene-propylene-styrene triblock copolymer (SEPS) (“Septon (trade name)” manufactured by Kuraray Co., Ltd.) as a styrene-based thermoplastic elastomer, and a softening point as a tackifier: 135 ° C. 28% by weight of hydrogenated dicyclopentadiene petroleum resin (“Escollets (trade name)” manufactured by Tonex Co., Ltd.) and polyisobutylene having a number average molecular weight of 1,300 as a softener (“GLISSSOPAL1300 manufactured by BASF”) (Trade name) ”) and 16% by weight of polyisobutylene having a viscosity average molecular weight of 40,000 (“ Tetrax 4T (trade name) ”manufactured by Nippon Petrochemical Co., Ltd.) were charged into a kneader (kneader). Then, melt and knead uniformly at a temperature of 170 ° C. for 60 minutes. It was obtained Tomah composition. Next, the vibration damping elastomer composition was formed into a sheet by hot press molding, and a vibration damping elastomer test piece having a diameter of 8 mm and a thickness of 1 mm was produced from the obtained sheet.
[0019]
Example 5
45% by weight of styrene-ethylene-propylene-styrene triblock copolymer (SEPS) (“Septon (trade name)” manufactured by Kuraray Co., Ltd.) as a styrenic thermoplastic elastomer, and softening point as a tackifier: 135 ° C. 30% by weight of a hydrogenated dicyclopentadiene-based petroleum resin (“Escollets (trade name)” manufactured by Tonex Co., Ltd.) and a polyisobutylene having a number average molecular weight of 1,300 as a softener (“GLISSSOPAL1300 manufactured by BASF”) (Trade name) ”) 10% by weight and 15% by weight of polyisobutylene having a viscosity average molecular weight of 30,000 (“ Tetrax 3T (trade name) ”manufactured by Nippon Petrochemical Co., Ltd.) were charged into a kneader. Then, melt and knead uniformly at a temperature of 170 ° C. for 60 minutes. It was obtained Tomah composition. Next, the vibration damping elastomer composition was formed into a sheet by hot press molding, and a vibration damping elastomer test piece having a diameter of 8 mm and a thickness of 1 mm was produced from the obtained sheet.
[0020]
Comparative Example 68% by weight of asphalt, 22% by weight of a styrene block copolymer as a thermoplastic rubber, and 10% by weight of polybutene as a tackifier were introduced into a kneader (kneader) and uniformly distributed at a temperature of 180 ° C. After melt-kneading, the obtained melt-kneaded product was taken out of the apparatus and allowed to cool to obtain an asphalt damping material. Next, the asphalt-based damping material was formed into a sheet by hot press molding, and an asphalt-based damping material test piece having a diameter of 8 mm and a thickness of 1 mm was produced from the obtained sheet.
[0021]
The damping force at a temperature of 0 to 40 ° C. was measured for the vibration damping elastomer specimens obtained in Examples 1 to 5 and the asphalt damping specimen specimens obtained in Comparative Examples. The evaluation method was performed by an Arbitrary Waveform Test using a viscoelasticity measuring apparatus manufactured by Rheometric Scientific. That is, a test piece having a diameter of 8 mm and a thickness of 1 mm is sandwiched between two plates, a sine wave having a distortion of 100% and a frequency of 0.5 Hz is input to one plate for 10 seconds by the servo motor, and the other plate Torque was measured by a torque measuring device connected to the, and a hysteresis curve showing the relationship between strain (%) and torque (Pa) was obtained. The hysteresis curve at 0 ° C. of the vibration-damping elastomer test piece of Example 1 is shown in FIG. The area (Pa ·%) of the obtained hysteresis curve was defined as a damping force. The hysteresis curve was measured at temperatures of 0 ° C., 20 ° C., and 40 ° C., and the hysteresis area at each temperature was obtained. The results are shown in Table 1 and FIG.
[0022]
[Table 1]
From Table 1 and FIG. 2, the vibration-damping elastomer compositions of Examples 1 to 5 are (a) the hysteresis area ratio between 0 ° C. and 20 ° C. is less than 2.8, and (b) between 20 ° C. and 40 ° C. The hysteresis area ratio at less than 1.9, (c) the hysteresis area ratio between 0 ° C. and 40 ° C. is less than 5.1, and the hysteresis area ratio between 0 ° C. and 40 ° C. is compared. When compared with Example 1, it is found to be as low as 5.08 / 34.32 (1 / 6.8) to 2.74 / 34.32 (1 / 12.5), and therefore the temperature dependency is small. Further, it is recognized that the asphalt-based damping material of the comparative example has a very large history area ratio between 0 ° C. and 40 ° C., and has a very large temperature dependency.
[0024]
【The invention's effect】
As described above, the vibration-damping elastomer composition of the present invention has low temperature dependency at a temperature of 0 to 40 ° C. and is excellent in damping properties.
[Brief description of the drawings]
FIG. 1 is a hysteresis curve of the relationship between strain and torque at 0 ° C. of the vibration-damping elastomer test piece of Example 1. FIG. 2 is a graph showing the relationship between the temperature and the hysteresis area of Examples and Comparative Examples of the present invention.
Claims (3)
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| JP2002293920A JP4423845B2 (en) | 2002-07-17 | 2002-10-07 | Vibration damping elastomer composition |
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| JP2018132104A (en) * | 2017-02-14 | 2018-08-23 | Ｊｘｔｇエネルギー株式会社 | High viscous fluid composition, method for producing high viscous fluid composition, and vibrational energy damping device |
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