JPH04130145A - Vibration-damping material - Google Patents
Vibration-damping materialInfo
- Publication number
- JPH04130145A JPH04130145A JP25275290A JP25275290A JPH04130145A JP H04130145 A JPH04130145 A JP H04130145A JP 25275290 A JP25275290 A JP 25275290A JP 25275290 A JP25275290 A JP 25275290A JP H04130145 A JPH04130145 A JP H04130145A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- natural
- damping
- component
- weight
- 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.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims abstract description 15
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 19
- 229920001194 natural rubber Polymers 0.000 claims abstract description 19
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 17
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 14
- 229920001778 nylon Polymers 0.000 claims abstract description 9
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 7
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical class C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 abstract description 22
- 239000005060 rubber Substances 0.000 abstract description 22
- 239000000203 mixture Substances 0.000 abstract description 12
- 239000000945 filler Substances 0.000 abstract description 6
- 239000004014 plasticizer Substances 0.000 abstract description 3
- 239000010734 process oil Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Vibration Prevention Devices (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Bridges Or Land Bridges (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、建築物や一般機器等に適用される振動減衰材
料の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in vibration damping materials applied to buildings, general equipment, and the like.
（従来の技術）
従来より、建物や道路橋等の建築物の基礎あるいは一般
機器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、建築物等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ＷｔＲ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 technology) Conventionally, as a foundation seismic isolation system for the purpose of seismic isolation in the event of a major earthquake in the foundations of buildings, road bridges, and other buildings or general equipment, laminated rubber and metal plates, which are laminated with rubber and metal plates, have been used. ,
It is common practice to use both steel dampers together. This steel damper requires a lot of time and money to construct and maintain, and has the disadvantage of narrowing the underground space of buildings and preventing its effective use. Recently, there has been a strong demand for seismic isolation using only WtR rubber by improving damping 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６００％
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 for such a high damping rubber material are:
While maintaining the same creep properties as conventional damping rubber,
600% to follow large horizontal displacements of laminated rubber.
In addition, the damping performance can be significantly improved.
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、スチレンブタジェンゴム（ＳＢＲ）、ブタジェン
ゴム（ＢＲ） 、天然ゴム、イン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ディトおよ
び可塑剤を適宜配合して加硫したもの（例えば特公昭５
５−５５４０号公報）などが多用されているが、上述の
護持性を充分満足するものは未だ得られていないのが実
状であった。On the other hand, conventional damping rubber materials for laminated rubber include rubbers such as styrene-butadiene rubber (SBR), butadiene rubber (BR), natural rubber, and imprene rubber, with fillers such as carbon black, graphite, and plasticizers as appropriate. Mixed and vulcanized products (e.g.
No. 5-5540) and the like have been widely used, but the reality is that no one has yet been obtained that fully satisfies the above-mentioned protection properties.
また、減衰性能を大幅に向上させるために組成物の粘弾
性挙動と変えて、具体的な特性としては等価減衰定数を
使用温度（約−１０〜４０°Ｃ）範囲において０，１５
以上とすること、かつ弾性率の温度依存性（ｍ度による
弾性率の変化）をできるだけ小さくして使用温度範囲内
での減衰特性を一定に保つことが必要とされる。これに
対処して天然ゴムに、これと相溶性の良いＳＢＲやＢ
Ｒ，をブレンドすることか試みられているが、未だ充分
な特性は得られていなかった。In addition, in order to significantly improve the damping performance, instead of the viscoelastic behavior of the composition, we have changed the equivalent damping constant to 0.15 in the usage temperature range (approximately -10 to 40°C).
In addition, it is necessary to keep the damping characteristics constant within the operating temperature range by minimizing the temperature dependence of the elastic modulus (change in the elastic modulus with m degrees) as much as possible. To deal with this, we have added SBR and B, which are compatible with natural rubber, to natural rubber.
Attempts have been made to blend R, but sufficient properties 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°Ｃ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
。(Problems to be Solved by the Invention) In view of the above points, the present invention provides a high-damping vibration damping material with significantly improved damping performance and elongation in the temperature range of approximately -10 to 40°C. The purpose is to provide.
（課題を解決するための手段）
本発明は即ち、（イ）天然ゴムまたはクロロプレンゴム
４０〜９０重量％と、（ロ）天然ゴムがグラフト結合さ
れているナイロン繊維５〜３０重量％と、（ハ）カルボ
キシ変性アクリロニトリル−ブタジエンゴム５〜３０重
量％とからなる混合物に充填剤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Ｎ料に関する。(Means for Solving the Problems) The present invention comprises: (a) 40 to 90% by weight of natural rubber or chloroprene rubber; (b) 5 to 30% by weight of nylon fibers to which natural rubber is grafted; c) A vibration damping N material characterized in that it is obtained by vulcanizing a composition in which a filler is blended into a mixture of 5 to 30% by weight of carboxy-modified acrylonitrile-butadiene rubber.
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（イ）天然ゴムまたはクロロプレンゴムをベー
ス樹脂とした組成物における前述の課題を解決すべく、
天然ゴムと相溶性の良いゴム（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（ハ）カルボキ
シ変性アクリロニトリル−ブタジエンゴムとく口）天然
ゴムかグラフト結合されているナイロン繊維とを添加し
た基本配合物を加硫すれば、減衰性能を大幅に向上させ
ながら組成物の伸びを６００％以上にできることを見い
出し本発明に至ったものである。The present inventors aimed to solve the above-mentioned problems in a composition using (a) natural rubber or chloroprene rubber as a base resin, which has good creep properties as a rubber material for laminated rubber.
As a result of examining various combinations of rubbers with good compatibility with natural rubber (SBR, BR, butyl rubber, ethylene propylene rubber, nitrile rubber, etc.), we found that (c) carboxy-modified acrylonitrile-butadiene rubber and (c) natural rubber. The present invention was based on the discovery that by vulcanizing a basic composition containing graft-bonded nylon fibers, the elongation of the composition could be increased to 600% or more while greatly improving the damping performance.
本発明における（口）天然ゴムがグラフト結合されてい
るナイロン繊維としては、表面に天然ゴムが化学的にグ
ラフト結合しているナイロン短繊維があり、例えばナイ
ロン繊維と天然ゴムが１：２の比率（重量）で平均径的
０．２μｍ以上、長さ１■程度のもの等が使用できる。In the present invention, the nylon fibers to which natural rubber is grafted include short nylon fibers to which natural rubber is chemically grafted on the surface; for example, the ratio of nylon fibers to natural rubber is 1:2. A material having an average diameter of 0.2 μm or more (by weight) and a length of about 1 square inch can be used.
具体的には、宇部興産社製の商品名ＦＲＲなどがある。Specifically, there is a product name FRR manufactured by Ube Industries, Ltd.
本発明における（ハ）カルボキシ変性アクリロニトリル
−ブタジエンゴムとしては、低分子量の分子鎖の末端に
カルボキシル基が付加した粘度約１０００〜６０万ｃＰ
の液状カルボキシ変性アクリロニトリル−ブタジエンゴ
ムおよび、アクリロニトリル−ブタジエンゴムにメタク
リル酸などのアクリルモノマーを共重合させて分子鎖の
途中にカルボキシル基を付加させた分子量２万〜１００
万程度の固形ゴムのいずれも使用できる。ただし、（イ
）成分との相溶性などから液状ゴムが特に好ましい。(c) Carboxy-modified acrylonitrile-butadiene rubber in the present invention has a viscosity of about 1,000 to 600,000 cP with a carboxyl group added to the end of a low molecular weight molecular chain.
liquid carboxy-modified acrylonitrile-butadiene rubber, and acrylonitrile-butadiene rubber with a molecular weight of 20,000 to 100, which is obtained by copolymerizing an acrylic monomer such as methacrylic acid to add a carboxyl group to the middle of the molecular chain.
Any of about 10,000 solid rubbers can be used. However, liquid rubber is particularly preferred from the viewpoint of compatibility with component (a).
本発明においては、カルボキシル基を有するアクリロニ
トリル−ブタジエンゴムを使用するので、（イ）天然ゴ
ムまたはクロロプレンゴムとの相溶性が良好であり、し
かも減衰性能を大幅に向上させることができる。In the present invention, since acrylonitrile-butadiene rubber having a carboxyl group is used, (a) it has good compatibility with natural rubber or chloroprene rubber, and the damping performance can be significantly improved.
また、（ハ）カルボキシ変性アクリロニトリル−ブタジ
エンゴムは、分子中のアクリロニトリル含有量が１０〜
３０重量％のものを用いれば、（イ）成分との相溶性と
弾性率の温度依存性、機械的特性などがさらに向上する
。Further, (c) carboxy-modified acrylonitrile-butadiene rubber has an acrylonitrile content in the molecule of 10 to 10.
If 30% by weight is used, the compatibility with component (a), temperature dependence of elastic modulus, mechanical properties, etc. will be further improved.
本発明においては、上述の各成分を（イ）成分４０〜９
０重量％と、（ロ）成分５〜３０重量％と、（ハ）成分
５〜３０重量％の割合で配合する。In the present invention, each of the above-mentioned components (a) components 40 to 9
0 weight %, component (b) 5 to 30 weight %, and component (c) 5 to 30 weight %.
（ロ）、１！たは（ハ）成分がこれより少ないと減衰性
能か不充分となり、逆にこれより多いとクリープ特性な
どの機械特性の低下が著しい。(b), 1! If the amount of the component (c) is less than this, the damping performance will be insufficient, whereas if it is more than this, the mechanical properties such as creep characteristics will be significantly deteriorated.
本発明の振動減衰材料は、これらの（イ）乃至（ハ）成
分と所定割合で混合したものにさらにフェライト粉末、
カーンブラックなどの充填剤を添加し、加硫させて製造
される。積層ゴムに使用する場合には加硫後の最終硬度
がＪ Ｉ Ｓ−Ａ硬度で４０〜７０度となるようにすれ
ば必要充分な機械特性が得られる。なお、この基本配合
に加えて可塑剤やプロセスオイル、その他の添加剤を本
発明の効果を損なわない範囲で添加することができる。The vibration damping material of the present invention further contains ferrite powder,
It is manufactured by adding fillers such as carne black and vulcanizing it. When used in laminated rubber, necessary and sufficient mechanical properties can be obtained by adjusting the final hardness after vulcanization to be 40 to 70 degrees in JIS-A hardness. In addition to this basic formulation, plasticizers, process oils, and other additives may be added to the extent that they do not impair the effects of the present invention.
（作用）
本発明においては、クリープ特性の良好な（イ〉天然ゴ
ムまたはクロロブレンゴムをベースとして、これに（ロ
）天然ゴムかグラフト結合されているナイロン繊維と、
（ハ）カルボキシ変性アクリロニトリル−ブタジエンゴ
ムとを所定量配合し充填剤と加えたものを加硫している
ので、約−１０〜４０″Ｃｃｉ′）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ることができ
る。また、（ハ）成分としてカルボキシ変性されたもの
と使用するので、カルボキシ変性されないアクリロニト
リル−ブタジエンゴムに比べてヤング率の温度変化が極
めて小さくなり、減衰性能は大きく向上する。(Function) In the present invention, nylon fibers having good creep properties (a) based on natural rubber or chloroprene rubber, and (b) natural rubber or graft bonded thereto;
(c) Since a predetermined amount of carboxy-modified acrylonitrile-butadiene rubber is blended and the filler is added, the mixture is vulcanized;
Damping performance and elongation can be significantly improved compared to conventional models. Furthermore, since a carboxy-modified rubber is used as component (iii), the temperature change in Young's modulus is extremely small compared to acrylonitrile-butadiene rubber that is not carboxy-modified, and the damping performance is greatly improved.
また、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。Moreover, if the vibration damping material obtained in this way is used for laminated rubber, there is no need to use a steel damper in combination with the basic seismic isolation system.
（実施例） 本発明の実施例について説明する。(Example) Examples of the present invention will be described.
実施例１〜３
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。これを用いて硬さ（Ｈｓ）、引張り強さ、
伸ひ、ビステリシスロス（２５°Ｃ）、１０°Ｃおよび
４０°Ｃにおけるヤング率の変化率（−１０°Ｃにおけ
る値／４０°Ｃにおける値）、等価減衰定数（２５°Ｃ
，振動０．５Ｈｚのサイン波、剪断歪１００％）牙それ
ぞれ測定した。なお、ヒステリシスロスは減衰性能を表
し、試料を２００ｍ／分で１００％引張り変形させたと
きのヒステリシス比を示す。これらの結果を表に示す。Examples 1 to 3 Vibration damping materials were manufactured by blending and vulcanizing each component according to the formulation shown in the table. Using this, hardness (Hs), tensile strength,
Elongation, bisteresis loss (25°C), rate of change of Young's modulus at 10°C and 40°C (value at -10°C/value at 40°C), equivalent damping constant (value at 25°C)
, a sine wave with a vibration frequency of 0.5 Hz, and a shear strain of 100%). Note that hysteresis loss represents damping performance, and indicates the hysteresis ratio when the sample is subjected to 100% tensile deformation at 200 m/min. These results are shown in the table.
比較例１〜４
比較として、（ハ）成分を欠如するもの（比較Ｍｌ）、
（ロ）成分を欠如するもの（比較例２）、カルボキシル
基を含有しないアクリロニトリル−ブタジエンゴムを使
用したもの（比較例３）、（ロ）および（ハ）成分を欠
如するもの（比較例４）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 4 As a comparison, those lacking the (c) component (comparative Ml),
Those lacking component (B) (Comparative Example 2), those using acrylonitrile-butadiene rubber containing no carboxyl group (Comparative Example 3), and those lacking components (B) and (C) (Comparative Example 4) Each component was blended and vulcanized in the formulation shown in the table, and tested 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、−１０〜４０°Ｃの幅広い温度範囲に亘ってヤ
ング率の温度変化が小さく、また減衰特性が極めて良好
で、しかも大きな伸びを有しており、これらの護持性を
同時に充分に満たすものである。(Effects of the Invention) As is clear from the above examples, the vibration damping material of the present invention has a small temperature change in Young's modulus over a wide temperature range of -10 to 40°C, and has extremely high damping characteristics. It has good and large elongation, and satisfies these protective properties at the same time.
Claims (1)
０重量％と、（ロ）天然ゴムがグラフト結合されている
ナイロン繊維５〜３０重量％と、（ハ）カルボキシ変性
アクリロニトリル−ブタジエンゴム５〜３０重量％とか
らなる混合物に充填剤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。(1) (a) Natural rubber or chloroprene rubber 40-9
0% by weight, (b) 5 to 30% by weight of nylon fibers grafted with natural rubber, and (c) 5 to 30% by weight of carboxy-modified acrylonitrile-butadiene rubber. A vibration damping material characterized by being made by vulcanizing a material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25275290A JP2902468B2 (en) | 1990-09-20 | 1990-09-20 | Vibration damping material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25275290A JP2902468B2 (en) | 1990-09-20 | 1990-09-20 | Vibration damping material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04130145A true JPH04130145A (en) | 1992-05-01 |
| JP2902468B2 JP2902468B2 (en) | 1999-06-07 |
Family
ID=17241792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25275290A Expired - Lifetime JP2902468B2 (en) | 1990-09-20 | 1990-09-20 | Vibration damping material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2902468B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104893043A (en) * | 2015-05-28 | 2015-09-09 | 安徽同丰橡塑工业有限公司 | Shock-reducing rubber |
| CN109988346A (en) * | 2019-01-18 | 2019-07-09 | 安徽屹盛机电科技有限公司 | A kind of grass trimmer cold resistant rubber |
-
1990
- 1990-09-20 JP JP25275290A patent/JP2902468B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104893043A (en) * | 2015-05-28 | 2015-09-09 | 安徽同丰橡塑工业有限公司 | Shock-reducing rubber |
| CN109988346A (en) * | 2019-01-18 | 2019-07-09 | 安徽屹盛机电科技有限公司 | A kind of grass trimmer cold resistant rubber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2902468B2 (en) | 1999-06-07 |
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