JP2893661B2 - Vibration damping material - Google Patents
Vibration damping materialInfo
- Publication number
- JP2893661B2 JP2893661B2 JP13492090A JP13492090A JP2893661B2 JP 2893661 B2 JP2893661 B2 JP 2893661B2 JP 13492090 A JP13492090 A JP 13492090A JP 13492090 A JP13492090 A JP 13492090A JP 2893661 B2 JP2893661 B2 JP 2893661B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- natural rubber
- weight
- parts
- vibration damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 title claims description 23
- 239000000463 material Substances 0.000 title claims description 14
- 244000043261 Hevea brasiliensis Species 0.000 claims description 32
- 229920003052 natural elastomer Polymers 0.000 claims description 32
- 229920001194 natural rubber Polymers 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 19
- 229920000459 Nitrile rubber Polymers 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 description 14
- 239000005060 rubber Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 239000005062 Polybutadiene Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920002857 polybutadiene Polymers 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000006735 epoxidation reaction Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、振動減衰材料の改良に関する。Description: FIELD OF THE INVENTION The present invention relates to improvements in vibration damping materials.
（従来の技術） 従来より、建築物における大地震時の免震を目的とす
る基礎免震システムとしては、ゴムと金属板とを積層し
た積層ゴムと鋼材ダンパーの双方を併用することが一般
に行われている。この鋼材ダンパーは施工作業やメンテ
ナンスの手間と費用がかかるとともに、建築物の地下空
間を狭くしてその有効利用を妨げるという欠点を有して
おり、これを併用せずに、減衰ゴム材料の減衰性能を向
上させることで積層ゴムのみで免震を行うことが最近強
く要求されている。(Prior art) Conventionally, as a basic seismic isolation system for the purpose of seismic isolation in the event of a large earthquake in a building, it has been common practice to use both a laminated rubber in which rubber and a metal plate are laminated and a steel damper in combination. Have been done. This steel damper has the drawback that it requires labor and cost for construction work and maintenance, and has the drawback of narrowing the underground space of the building and hindering its effective use. Recently, there is a strong demand for seismic isolation using only laminated rubber by improving performance.
このような高減衰の減衰ゴム材料に要求される特性
は、従来の減衰ゴムと同様のクリープ特性を保持しなが
ら、積層ゴムの水平方向の大変位に追従できるように60
0％以上の伸びを有し、さらに減衰性能を大幅に向上さ
せることなどがある。The characteristics required of such a high damping rubber material are such that it can follow the large horizontal displacement of the laminated rubber while maintaining the same creep characteristics as conventional damping rubber.
It has an elongation of 0% or more, and further significantly improves damping performance.
これに対して積層ゴムにおける従来の減衰ゴム材料と
しては、スチレンブタジエンゴム（SBR）、ブタジエン
ゴム（BR）、天然ゴム、イソプレンゴムなどのゴムに、
充填剤としてカーボンブラックやグラファイトおよび可
塑剤を適宜配合して加硫したもの（例えば特公昭55−55
40号公報）などが多用されているが、上述の諸特性を充
分満足するものは未だ得られていないのが実情であっ
た。また、減衰性能を大幅に向上させるためには組成物
の粘弾性挙動を変える（即ち、使用温度（約−10〜40
℃）範囲において、損失係数（tan δ）を大きく、かつ
ヤング率を適正な値に保つ）ことが必要であり、天然ゴ
ムに、これと相溶性の良いSBRやBRをブレンドすること
も試みられているが未だ充分な特性は得られていなかっ
た。In contrast, conventional damping rubber materials for laminated rubber include rubber such as styrene-butadiene rubber (SBR), butadiene rubber (BR), natural rubber, isoprene rubber,
Vulcanized by appropriately blending carbon black, graphite and a plasticizer as a filler (for example, Japanese Patent Publication No. 55-55)
No. 40) is frequently used, but it has been the case that a material which sufficiently satisfies the above-mentioned characteristics has not yet been obtained. Further, in order to greatly improve the damping performance, the viscoelastic behavior of the composition is changed (that is, the operating temperature (about -10 to 40).
(° C) range, it is necessary to increase the loss factor (tan δ) and keep the Young's modulus at an appropriate value), and attempts have been made to blend natural rubber with SBR and BR with good compatibility with this. However, sufficient characteristics have not yet been obtained.
（発明が解決しようとする課題） 以上の点に鑑みて、本発明は約−10〜40℃の温度範囲
において、減衰性能と伸びを従来より大幅に向上させた
高減衰の振動減衰材料を提供することを目的とする。
（課題を解決するための手段） 本願第１の発明は即ち、天然ゴム100重量部と液体ア
クリロニトリルーブタジエンゴム５〜30重量部の混合物
を主成分とする組成物を加硫させてなることを特徴とす
る振動減衰材料に関し、また、本願第２の発明は、天然
ゴムに、液状アクリロニトリルーブタジエンゴム、エポ
キシ化天然ゴム、およびポリアミド繊維がグラフト結合
されている天然ゴムとを配合した組成物を加硫させてな
ることを特徴とする振動減衰材料に関する。(Problems to be Solved by the Invention) In view of the above points, the present invention provides a high damping vibration damping material having significantly improved damping performance and elongation in the temperature range of about -10 to 40 ° C. The purpose is to do.
(Means for Solving the Problems) The first invention of the present application is to vulcanize a composition mainly composed of a mixture of 100 parts by weight of natural rubber and 5 to 30 parts by weight of liquid acrylonitrile-butadiene rubber. The second invention of the present application relates to a vibration damping material characterized by comprising a composition obtained by mixing a natural rubber, a liquid acrylonitrile-butadiene rubber, an epoxidized natural rubber, and a natural rubber to which polyamide fibers are graft-bonded. The present invention relates to a vibration damping material characterized by being vulcanized.
本発明者等は、積層ゴムのゴム材料としてクリープ特
性の良好な天然ゴムをベース樹脂とした組成物における
上記課題を解決すべく、天然ゴムとの相溶性の良いゴム
（SBR、BR、ブチルゴム、エチレンプロピレンゴム、ニ
トリルゴムなど）との各種配合を検討した結果、上述の
ごとく液体アクリロニトリルーブタジエンゴムを添加し
た基本配合物を加硫すれば、減衰性能を良好に保持しな
がら組成物の伸びを大幅に向上させること、さらにこら
れの特性はその他の特定の成分を配合することによって
さらに大きく向上することを見い出し本発明に至ったも
のである。The present inventors, in order to solve the above-mentioned problems in a composition based on natural rubber having good creep properties as a rubber material of the laminated rubber, rubber having good compatibility with natural rubber (SBR, BR, butyl rubber, As a result of examining various blends with ethylene propylene rubber and nitrile rubber, if the basic blend containing liquid acrylonitrile-butadiene rubber is vulcanized as described above, the elongation of the composition can be improved while maintaining good damping performance. The present invention has been found to be greatly improved, and it has been found that these characteristics can be further greatly improved by adding other specific components.
本発明において天然ゴムとともに配合する液状アクリ
ルニトリルーブタジエンゴムは、ブタジエンとアクリロ
ニトリルのラジカル重合から得られ、分子鎖の両末端に
カルボキシル基などの官能基を持つテレケリック型およ
び官能基を持たない非テレケリック型の、粘度約1000〜
60万cPの公知のものの中から適宜選択して配合すること
ができる。また、これはアクリロニトリル基を持つため
天然ゴムとの相溶性が良好である。Liquid acrylonitrile-butadiene rubber compounded with natural rubber in the present invention is obtained by radical polymerization of butadiene and acrylonitrile, and is a telechelic type having a functional group such as a carboxyl group at both ends of a molecular chain and a non-telechelic type having no functional group. About 1000 ~
It can be appropriately selected and blended from among 600,000 cP known substances. Further, since it has an acrylonitrile group, it has good compatibility with natural rubber.
本願第１の発明においては、天然ゴム100重量部に対
して液状アクリロニトリルーブタジエンゴムを５〜30重
量部混合し常法により加硫する。液状アクリロニトリル
ーブタジエンゴムの配合量が５重量部未満では−10〜40
℃におけるtan δの増大がほとんど無く、従って減衰性
能の向上が小さい。また30重量部を越えると粘弾性挙動
の温度変化が大きくなり、従って−10〜40℃の範囲にお
いて一定の良好な特性を保持することが困難になる上、
得られる組成物の粘性が大きすぎて作業性が悪くなる。
なお、本願第１の発明においては、この基本配合に加え
てフェライト粉末、カーンブラックなどの充填剤やプロ
セスオイルなどを本発明の効果を損なわない範囲で添加
することができる。フェライト粉末などの充填剤の場合
は天然ゴム100重量部に対して30重量部以下が望まし
い。これより多いと充填剤の２次凝集が生じて、得られ
る組成物の伸びが低下することがある。In the first invention of the present application, 5 to 30 parts by weight of a liquid acrylonitrile butadiene rubber is mixed with 100 parts by weight of natural rubber and vulcanized by a conventional method. If the amount of the liquid acrylonitrile-butadiene rubber is less than 5 parts by weight, -10 to 40
There is almost no increase in tan δ at ° C., and therefore the improvement in damping performance is small. Further, if it exceeds 30 parts by weight, the temperature change of the viscoelastic behavior becomes large, so that it becomes difficult to maintain certain good properties in the range of -10 to 40 ° C.
The viscosity of the resulting composition is too high, resulting in poor workability.
In the first invention of the present application, a filler such as ferrite powder and kern black, a process oil, and the like can be added in addition to the basic compounding as long as the effects of the present invention are not impaired. In the case of a filler such as ferrite powder, the amount is desirably 30 parts by weight or less based on 100 parts by weight of natural rubber. If the amount is larger than this, secondary agglomeration of the filler may occur, and the elongation of the obtained composition may decrease.
本願第２の発明は、天然ゴムと上述の液状アクリロニ
トリルーブタジエンゴムとを配合したところへさらに、
エポキシ化天然ゴムと、ポリアミド繊維がグラフト結合
されている天然ゴムとを添加しで加硫してなる。The second invention of the present application further provides a blend of natural rubber and the above-mentioned liquid acrylonitrile-butadiene rubber.
It is obtained by adding and vulcanizing an epoxidized natural rubber and a natural rubber to which a polyamide fiber is graft-bonded.
ここで、エポキシ化天然ゴムは、天然ゴムの骨格にエ
ポキシ基がランダムに付加しているものであり、エポキ
シ化率などを適宜設定して使用することができる。Here, the epoxidized natural rubber is obtained by randomly adding an epoxy group to the skeleton of the natural rubber, and can be used by appropriately setting the epoxidation ratio and the like.
また、上記ポリアミド繊維グラフト化天然ゴムとして
は、表面にナイロン短繊維が化学的にグラフト結合して
いる天然ゴムがあり、例えばナイロン繊維と天然ゴムが
12の比率（重量）で平均径約0.2μｍ以上、長さ1mm程度
のもの等が使用できる。具体的には、宇部興産社製の商
品名FRRなどがある。Further, as the polyamide fiber-grafted natural rubber, there is a natural rubber in which nylon short fibers are chemically grafted on the surface.
Those having an average diameter of about 0.2 μm or more and a length of about 1 mm at a ratio (weight) of 12 can be used. Specifically, there is a product name, FRR, manufactured by Ube Industries, Ltd.
本願第２の発明において、これらの各成分の配合割合
は、天然ゴム100重量部に対して液状アクリロニトリル
ーブタジエンゴムを５〜30重量部、エポキシ化天然ゴム
を５〜50重量部が望ましい。この範囲内では得られる組
成物の減衰性能が極めて良好である。また、ポリアミド
繊維がグラフト結合されている天然ゴムは天然ゴム100
重量部に対して５〜30重量部が好ましく、これより少な
いと減衰性能の向上が少なく、これより多いと得られる
組成物の伸びが低下することがある。なお、本願第２の
発明においては本願第１の発明と同様に、フェライト粉
末、カーンブラックなどの充填剤やプロセスオイルなど
を本発明の効果を損なわない範囲で添加することができ
る。In the second invention of the present application, the mixing ratio of these components is preferably 5 to 30 parts by weight of liquid acrylonitrile butadiene rubber and 5 to 50 parts by weight of epoxidized natural rubber with respect to 100 parts by weight of natural rubber. Within this range, the resulting composition has very good damping performance. Natural rubber grafted with polyamide fiber is natural rubber 100.
The amount is preferably 5 to 30 parts by weight with respect to the weight part. If the amount is less than this, the improvement in the damping performance is small, and if it is more than this, the elongation of the obtained composition may decrease. In the second invention of the present application, similarly to the first invention of the present application, a filler such as ferrite powder and kahn black, a process oil, and the like can be added as long as the effects of the present invention are not impaired.
（作用） 本発明においては、クリープ特性の良好な天然ゴムを
ベースとして、これに液状アクリロニトリルーブタジエ
ンゴムを所定量配合して加硫しているので、天然ゴム自
体の特性を損なうこと無く組成物の伸びを大幅に向上さ
せることができる。さらに、この組成物にエポキシ化天
然ゴムと、ポリアミド繊維がグラフト結合されている天
然ゴムとを併用して加硫すれば、伸びを良好に保持しつ
つ、その減衰性能を飛躍的に向上させることができるの
で、このようにして得られた振動減衰材料を積層ゴムに
使用すれば、基礎免震システムにおいて鋼材ダンパーを
併用する必要がない。(Action) In the present invention, a natural rubber having good creep characteristics is used as a base, and a predetermined amount of liquid acrylonitrile-butadiene rubber is blended with the natural rubber for vulcanization. Can be greatly improved. Furthermore, if the composition is vulcanized in combination with an epoxidized natural rubber and a natural rubber to which a polyamide fiber is graft-bonded, the damping performance can be dramatically improved while maintaining good elongation. Therefore, if the vibration damping material thus obtained is used for a laminated rubber, it is not necessary to use a steel damper in the base seismic isolation system.
（実施例） 本発明の実施例について説明する。(Example) An example of the present invention will be described.
実施例１〜５ 本願第１の発明にかかる実施例を実施例１〜２に、ま
た本願第２の発明にかかる実施例を実施例３〜５に示
す。表に示す配合で、各成分を配合し加硫して振動減衰
材料を製造した。これを用いて伸び、引張り強さ、tan
δ（23℃、0.3Hz、DMTAによる）、−10℃および40℃に
おけるヤング率の変化率（−10℃における値/40℃にお
ける値）、硬さ（Hs）をそれぞれ測定した。結果を表に
示す。Examples 1 to 5 Examples according to the first invention of the present application are shown in Examples 1 and 2, and examples according to the second invention of the present application are shown in Examples 3 to 5. The components shown in the table were blended and vulcanized to produce a vibration damping material. Using this, elongation, tensile strength, tan
δ (23 ° C., 0.3 Hz, by DMTA), the rate of change of Young's modulus at −10 ° C. and 40 ° C. (value at −10 ° C./value at 40 ° C.), and hardness (Hs) were measured, respectively. The results are shown in the table.
比較例１〜８ 比較として、エポキシ化天然ゴムのみをベースゴムと
して用いたもの（比較例１）、液状ニトリルゴムを併用
しないもの（比較例２〜５）、液状ニトリルゴムの添加
量が過少のもの（比較例６）、その逆に過剰のもの（比
較例７）、液状ニトリルゴムの代わりにSBRを用いたも
の（比較例８）について、それぞれ表に示す配合で各成
分を配合して加硫し、実施例１と同様に試験した。結果
を表に示す。Comparative Examples 1 to 8 For comparison, those using only epoxidized natural rubber as a base rubber (Comparative Example 1), those not using liquid nitrile rubber in combination (Comparative Examples 2 to 5), and the addition amount of liquid nitrile rubber being too small Each of the components (Comparative Example 6), conversely, the excess (Comparative Example 7) and the one using SBR instead of the liquid nitrile rubber (Comparative Example 8) were prepared by mixing the respective components according to the formulation shown in the table. The test was conducted in the same manner as in Example 1. The results are shown in the table.
（発明の効果） 以上の実施例からも明らかなように、本発明の振動減
衰材料は、良好なtan δ値を有しながら、伸びを大幅に
向上させており、さらにヤング率の温度変化が小さいの
で、−10〜40℃の幅広い温度範囲に亘って極めて優れた
減衰性能を示す。 (Effect of the Invention) As is clear from the above examples, the vibration damping material of the present invention has a significantly improved elongation while having a good tan δ value, and furthermore, the temperature change of the Young's modulus is reduced. Since they are small, they exhibit extremely good damping performance over a wide temperature range of -10 to 40C.
───────────────────────────────────────────────────── フロントページの続き 審査官 一色 由美子 (56)参考文献 特開 昭62−96543（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C08L 7/00 - 21/02 C09K 3/00 ────────────────────────────────────────────────── ─── Continued on the front page Examiner Yumiko Isshiki (56) References JP-A-62-96543 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C08L 7/00-21 / 02 C09K 3/00
Claims (2)
ル−ブタジエンゴム５〜30重量部の混合物を主成分とす
る組成物を加硫させてなることを特徴とする振動減衰材
料。1. A vibration damping material obtained by vulcanizing a composition mainly composed of a mixture of 100 parts by weight of natural rubber and 5 to 30 parts by weight of liquid acrylonitrile-butadiene rubber.
ル−ブタジエンゴム５〜30重量部の混合物に、エポキシ
化天然ゴム、およびポリアミド繊維がグラフト結合され
ている天然ゴムとを配合した組成物を加硫させてなるこ
とを特徴とする振動減衰材料。2. A composition comprising a mixture of 100 parts by weight of natural rubber and 5 to 30 parts by weight of liquid acrylonitrile-butadiene rubber mixed with an epoxidized natural rubber and a natural rubber grafted with polyamide fibers. A vibration damping material characterized by being formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13492090A JP2893661B2 (en) | 1990-05-24 | 1990-05-24 | Vibration damping material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13492090A JP2893661B2 (en) | 1990-05-24 | 1990-05-24 | Vibration damping material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0428784A JPH0428784A (en) | 1992-01-31 |
| JP2893661B2 true JP2893661B2 (en) | 1999-05-24 |
Family
ID=15139632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13492090A Expired - Lifetime JP2893661B2 (en) | 1990-05-24 | 1990-05-24 | Vibration damping material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2893661B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4737171B2 (en) * | 1998-04-15 | 2011-07-27 | 横浜ゴム株式会社 | Method for evaluating and preparing rubber composition for rubber-isolated laminate |
| JP4010680B2 (en) * | 1998-11-20 | 2007-11-21 | 横浜ゴム株式会社 | Brace damper |
| US6812294B2 (en) * | 2001-12-21 | 2004-11-02 | Freudenberg-Nok General Partnership | Solventless liquid nitrile compounds |
-
1990
- 1990-05-24 JP JP13492090A patent/JP2893661B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0428784A (en) | 1992-01-31 |
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