JPS6354455A - Temperature-sensitive rubber composition - Google Patents
Temperature-sensitive rubber compositionInfo
- Publication number
- JPS6354455A JPS6354455A JP19765086A JP19765086A JPS6354455A JP S6354455 A JPS6354455 A JP S6354455A JP 19765086 A JP19765086 A JP 19765086A JP 19765086 A JP19765086 A JP 19765086A JP S6354455 A JPS6354455 A JP S6354455A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- temperature
- trans
- diene
- glass transition
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 55
- 239000005060 rubber Substances 0.000 title claims abstract description 55
- 239000000203 mixture Substances 0.000 title claims abstract description 21
- 229920003244 diene elastomer Polymers 0.000 claims abstract description 21
- 230000009477 glass transition Effects 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 229920003049 isoprene rubber Polymers 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011593 sulfur Substances 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 150000001993 dienes Chemical class 0.000 claims description 8
- 229920003051 synthetic elastomer Polymers 0.000 claims description 8
- 239000005061 synthetic rubber Substances 0.000 claims description 8
- 244000043261 Hevea brasiliensis Species 0.000 claims description 7
- 229920003052 natural elastomer Polymers 0.000 claims description 7
- 229920001194 natural rubber Polymers 0.000 claims description 7
- 238000007906 compression Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 description 13
- 238000002474 experimental method Methods 0.000 description 7
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 6
- 229920001084 poly(chloroprene) Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 244000001591 balata Species 0.000 description 1
- 235000016302 balata Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010060 peroxide vulcanization Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- -1 softeners Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 229920003212 trans-1,4-polyisoprene Polymers 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明はトランス−１，４結合単位が９０モル％以上の
ジエン系ゴムをブレンドしたゴム組成物。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention is a rubber composition blended with a diene rubber containing 90 mol % or more of trans-1,4 bond units.
特に温度に順応して、硬さや剛性などを変化させ得る感
温性ゴム組成物に関す゛るものである。In particular, it relates to a temperature-sensitive rubber composition whose hardness, rigidity, etc. can be changed in accordance with temperature.
その主な利用分野は氷雪路用タイヤ部材、防振ゴム部材
、センサーやアクチュエータなどである。Its main fields of use include tire components for icy and snowy roads, anti-vibration rubber components, sensors and actuators.
〈従来の技術〉
特開昭５９−１９９３０８ ｒ氷雪路用空気入リタイヤ
」において、スパイクのフランジが５℃以下の温度では
トレッドゴムよりも高い硬さとなり、３０℃以上の温度
ではトレッドゴムと同等もしくは低い硬さとなる特性を
有するゴム材質として、ガラス転移温度が３５℃の原料
ゴムであるノルボルネンゴム組成物を使用した実施例が
記載されている。<Prior art> In JP-A-59-199308 r Pneumatic Retirement for Ice and Snow Roads, the flange of the spike has a hardness higher than that of tread rubber at temperatures below 5°C, and is equivalent to tread rubber at temperatures above 30°C. Alternatively, an example is described in which a norbornene rubber composition, which is a raw material rubber with a glass transition temperature of 35° C., is used as a rubber material having a characteristic of low hardness.
〈発明が解決しようとする間層点〉
ノルボルネンゴムは、ガラス転移温度が３５℃を示すが
油展ゴムとして使用する事により、ガラス転移温度を低
温側に移動出来る。<Interlayer point to be solved by the invention> Norbornene rubber exhibits a glass transition temperature of 35°C, but by using it as an oil-extended rubber, the glass transition temperature can be moved to a lower temperature side.
しかし、ノルボルネンゴムはガラス転移温度より約１０
〜２０℃上までの温度範囲で、低温になるに従い硬くな
るが、ガラス転移温度以下では、凍結してしまい脆くな
る。しかも油展してガラス転移温度を下げると、その温
度より１０〜２０℃以上の温度では、充分温度順応しな
くなるという問題点があった。つまり、ノルボルネンゴ
ムの感温性は、ガラス転移温度に附随して生じる現象で
あり、耐寒性と感温性とを同時に合わせもつ事が困難で
あるという問題があった。However, norbornene rubber is about 10
In the temperature range of ~20°C, it becomes harder as the temperature decreases, but below the glass transition temperature, it freezes and becomes brittle. Moreover, when the glass transition temperature is lowered by oil extension, there is a problem that the glass transition temperature cannot be sufficiently adapted at temperatures 10 to 20°C higher than that temperature. In other words, the temperature sensitivity of norbornene rubber is a phenomenon that occurs along with the glass transition temperature, and there is a problem in that it is difficult to have both cold resistance and temperature sensitivity at the same time.
〈問題点を解決するための手段〉
本発明者は上記問題を解決すべく鋭意研究の結果、ノル
ボルネンゴムや、それに類するガラス転移温度の高いゴ
ム原料を用いたのでは耐寒性と感温性を合わせもつ感温
性ゴムは得られないが、ガラス転移温度が低くトランス
−１，４結合が９０％以上のジエン系ゴムを天然ゴムお
よびジエン系合成ゴ１１から選ばれた少なくとも一種の
ゴムとブレンドして使用し、加硫することにより温度に
順応して硬さや剛性が会、速に変化する感温性にすぐれ
。<Means for Solving the Problems> As a result of intensive research in order to solve the above-mentioned problems, the present inventor found that using norbornene rubber or similar rubber raw materials with a high glass transition temperature has poor cold resistance and temperature sensitivity. Although it is not possible to obtain a thermosensitive rubber with the same characteristics, a diene rubber with a low glass transition temperature and a trans-1,4 bond of 90% or more is blended with at least one rubber selected from natural rubber and diene synthetic rubber. By using it as a material and vulcanizing it, it adapts to the temperature and changes in hardness and rigidity, and has excellent temperature sensitivity.
その他の物性や耐寒性が著しく改警される事を見出し、
本発明を達成するに至った。We found that other physical properties and cold resistance were significantly improved.
The present invention has been achieved.
即ち１本発明の優れた感温性及び耐寒性を有するゴム組
成物は、トランス−１，４結合単位が９０モル％以上で
、結晶化度が２０〜５０％、ガラス転移温度が一３０℃
以下のジエン系ゴム３０〜９０重量部と天然ゴム及びそ
の他のジエン系合成ゴムから選ばれた少なくとも１種の
ゴム７０〜１０重景部を混合したブレンドゴムに加硫剤
を含有してなる感湿性ゴム組成物であることを特徴とす
る。Specifically, the rubber composition of the present invention having excellent temperature sensitivity and cold resistance has a trans-1,4 bond unit of 90 mol % or more, a crystallinity of 20 to 50%, and a glass transition temperature of -30°C.
A rubber blend containing 30 to 90 parts by weight of the following diene rubbers and 70 to 10 parts by weight of at least one rubber selected from natural rubber and other diene synthetic rubbers, containing a vulcanizing agent. It is characterized by being a wet rubber composition.
本発明で用いられるトランス−１，４結合を有するジエ
ン系ゴムとしては１通常の意味ではガンターパーチャや
バラタ、あるいはトランス−１゜４−ポリイソプレン、
トランス−１，４−ポリクロロプレン、トランス−１，
４−ポリブタジェンなどが含まれるが、それのみに限ら
ず適宜、その他のジエン系ゴムを使用することが出来る
６元来ジエン系ゴムは、１．４結合で大部分は結合して
いるが、１，２結合も含まれ分岐している。また、１．
４構造単位は、シス型またはトランス型の２つの型をと
り得るが、一般に対称性でないシス型は非（低）結晶性
であるが対称性を有するトランス型は、結晶性を有する
事がよく知られている１本発明では特にこの結晶化する
事が重要であってトランス−１，４結合を有しガラス転
移温度が一３０℃以下のジエン系ゴムを使用するが、そ
れにはトランス−１，４結合が９０％以上で、結晶化度
が２０〜５０％である事が必要である。The diene rubbers having trans-1,4 bonds used in the present invention include Gunter-percha, balata, trans-1°4-polyisoprene,
trans-1,4-polychloroprene, trans-1,
Although 4-polybutadiene is included, other diene rubbers can be used as appropriate.Six-element diene rubbers are mostly bonded with 1.4 bonds, but 1. , 2 bonds are also included and branched. Also, 1.
4 Structural units can take two forms, cis-type or trans-type, but generally the cis-type, which is not symmetrical, has non-(low) crystallinity, but the trans-type, which has symmetry, often has crystallinity. Known 1 In the present invention, this crystallization is particularly important, and a diene rubber having trans-1,4 bonds and a glass transition temperature of 130°C or less is used. , 4 bonds should be 90% or more, and the crystallinity should be 20 to 50%.
この中でもトランス−１，４−イソプレンゴムは品質が
安定で天然ゴムや他のジエン系ゴムとのブレンド性（相
容性）にもすぐれているので好ましい。本発明において
は原料ゴムとして上記トランス−１，４結合を有するジ
エン系ゴムを３０〜９０重量部と、天然ゴムおよびその
他のジエン系合成ゴムから選ばれた少なくとも１種のゴ
ム７０〜１０重量部を混合したブレンドゴムを用いるが
、ブレンドゴムを用いる場合トランス−１，４結合を有
するジエン系ゴムが３０〜９０重量部以内で、かつ加硫
剤を含有していなければ、本発明で意図するゴム組成物
を得る事が出来ない。Among these, trans-1,4-isoprene rubber is preferred because it is stable in quality and has excellent blendability (compatibility) with natural rubber and other diene rubbers. In the present invention, the raw material rubber includes 30 to 90 parts by weight of the diene rubber having the trans-1,4 bond, and 70 to 10 parts by weight of at least one rubber selected from natural rubber and other diene synthetic rubbers. However, when using a blended rubber, if the diene rubber having trans-1,4 bonds is within 30 to 90 parts by weight and does not contain a vulcanizing agent, it is necessary to use a blended rubber as intended in the present invention. It is not possible to obtain a rubber composition.
また、ブレンドゴムに使用されるジエン系合成ゴムとは
広い意味に解されるもので、例えば通常のイソプレンゴ
ム（ＴＲ）、クロロプレンゴム（ＣＲ）、スチレン・ブ
タジェンゴム（ＳＢＲ）、ブタジェンゴム（ＯＲ） 、
アクリロニトリルブタジェンゴム（Ｎ［１ｌＲ）等があ
る。ここで云うジエン系合成ゴムとしては、特に結合構
造を明記していないが、トランス−１゜４結合以外のも
のが使用出来その他の結晶性を有するもの、＠えば、シ
ンジオタクチック−１，２結合−ポリプタジエンなども
有効である６次に、上ｕＭ料ゴムに添加される加硫剤と
してはクロロプレンゴム以外では硫黄あるいはパーオキ
サイドが使用出来る。クロロプレゴムは公知の金属酸化
物とチオ尿素系の化合物などが使用できる０本発明にお
いては加硫剤が使用されるがこの理由としては加硫剤が
添加されなければ、結晶性はすぐれるが未加硫であるた
め除晶時及び高温時のゴム物性が悪化するからである。Furthermore, the diene-based synthetic rubber used in blended rubber is understood in a broad sense, and includes, for example, ordinary isoprene rubber (TR), chloroprene rubber (CR), styrene-butadiene rubber (SBR), butadiene rubber (OR),
Examples include acrylonitrile butadiene rubber (N[11R). Although the bond structure is not specified as the diene synthetic rubber referred to here, it is possible to use substances other than trans-1゜4 bonds and have other crystallinity, such as syndiotactic-1,2. Bonded polyptadiene and the like are also effective.6 Next, as the vulcanizing agent added to the upper uM material rubber, sulfur or peroxide can be used in addition to chloroprene rubber. Known metal oxides and thiourea-based compounds can be used for chloropre-rubber. In the present invention, a vulcanizing agent is used, but the reason for this is that if a vulcanizing agent is not added, although crystallinity is excellent, This is because the physical properties of the rubber deteriorate during crystal removal and at high temperatures due to vulcanization.
特に１．４−トランス結合を含有するジエン系ゴムが合
成イソプレンゴムであり加硫剤として０．１〜１重量部
の硫黄を含有するものは物性と共に結晶性がすぐれてい
る。硫黄量が１重量部を越えると結晶性が阻害され、そ
のトランスイソプレンゴムのブレンド割合を多くする必
要があり、経済的にも不利である。In particular, diene rubbers containing 1,4-trans bonds that are synthetic isoprene rubbers that contain 0.1 to 1 part by weight of sulfur as a vulcanizing agent have excellent physical properties and crystallinity. If the amount of sulfur exceeds 1 part by weight, crystallinity is inhibited and the blending ratio of the trans isoprene rubber must be increased, which is also economically disadvantageous.
本発明のゴム組成物には１通常使用される配合剤１例え
ば加硫促進剤、加硫促進助剤、老化防止剤、酸化防止剤
、可塑剤、軟化剤、補強剤、充填剤が目的に応じて適宜
配合されるのはもちろんである。The rubber composition of the present invention contains 1 commonly used compounding agents, such as vulcanization accelerators, vulcanization accelerating aids, antiaging agents, antioxidants, plasticizers, softeners, reinforcing agents, and fillers. Of course, the ingredients may be mixed as appropriate.
く作用〉
本発明においては、ジエン系ゴムの付加構造のうち、ト
ランス−１，４結合のものとシス−１゜４結合などその
他の結合のもののブレンド物を加硫して使用したことに
より耐寒性は良好でありながら結晶性に優れ、かくして
得られた本発明のゴム組成物は温度が低下すると結晶化
により硬化して硬さが増し、融点以上の温度になると軟
化して硬さが減少し、全体として感温性にすぐれしかも
。In the present invention, cold resistance is achieved by vulcanizing and using a blend of the additional structures of diene rubber, including those with trans-1,4 bonds and those with other bonds such as cis-1゜4 bonds. The rubber composition of the present invention thus obtained hardens due to crystallization and increases in hardness when the temperature decreases, and softens and decreases in hardness when the temperature exceeds the melting point. However, overall it has excellent temperature sensitivity.
圧縮永久歪や引裂強さなどのゴム物性もすぐれたものと
なっている。Rubber properties such as compression set and tear strength are also excellent.
〈実施例〉 次に本発明を実施例により説明する。<Example> Next, the present invention will be explained by examples.
実施例１ 硬さの温度変化等
第１表に示す原料ゴムを用い、１４種類の配合割合（重
量部）でゴム組成物をつくり、そ九ぞれの配合成分を８
インチ式テストロールで混練りした後、１６０℃でプレ
ス加硫して加硫ゴムを得た。硬さの温度変化、低温での
衝撃脆化テスト、圧縮永久歪み及び引裂き強さを測定し
、それらの結果を第１表に併記する。ここで用いたトラ
ンス−１，４−ポリイソプレンは、トランス−１，４結
合９９％。Example 1 Using the raw rubber shown in Table 1, such as temperature change in hardness, rubber compositions were made at 14 different blending ratios (parts by weight), and each of the 9 blending ingredients was 8%
After kneading with an inch test roll, the mixture was press-vulcanized at 160°C to obtain a vulcanized rubber. Temperature change in hardness, impact embrittlement test at low temperature, compression set and tear strength were measured, and the results are also listed in Table 1. The trans-1,4-polyisoprene used here has 99% trans-1,4 bonds.
結晶化度３６％、ガラス転移温度−６８℃のものを使用
している。いずれのテストもＪＩＳＫ６３０１に規定す
る方法に準拠した。The material used has a crystallinity of 36% and a glass transition temperature of -68°C. All tests were conducted in accordance with the method specified in JISK6301.
実験＆１及び２にノルボルネンゴムを使用した比較例を
示した。ノルボルネンゴムの低油展配合Ｎα１では硬さ
の温度による変化度合は充分であるが耐寒性が実験例中
量も悪くなっている。 次に高油展配合−２では、＆１
より耐寒性は改善されているが感温性がほとんどなくな
り、その他の物性も悪化している。Comparative examples using norbornene rubber were shown in Experiments &1 and 2. With the low oil expansion formulation Nα1 of norbornene rubber, the degree of change in hardness due to temperature is sufficient, but the cold resistance is poor even in the experimental examples. Next, in high oil extension formulation-2, &1
Although the cold resistance has been improved, the temperature sensitivity has almost disappeared, and other physical properties have also deteriorated.
実験＆３．４及び１３に、トランス−１，４結合を有す
るジエン系ゴム（本実験では、トランス−１゜４−ポリ
イソプレンを使用）が本発明における３０〜９０重量部
から外れた比較例を示す、トランス−１，４結合を有す
るジエン系ゴムが３０重量部未満であるＮ１１３、嵐４
は殆んど温度による硬さ変化を示さない。In Experiment & 3.4 and 13, comparative examples were conducted in which the diene rubber having trans-1,4 bonds (trans-1°4-polyisoprene was used in this experiment) was outside the range of 30 to 90 parts by weight in the present invention. N113, Arashi 4, in which the diene rubber having trans-1,4 bonds is less than 30 parts by weight
shows almost no change in hardness due to temperature.
またそのゴムが単味で使用されたＮα１３では温度によ
る硬さ変化は大きいが低温例での剛性が極端に大きく、
圧縮永久歪みも大きくなり、高温例での引裂き強さが著
しく低下しており問題である。In addition, Nα13, in which the rubber was used alone, has a large change in hardness depending on temperature, but the stiffness at low temperatures is extremely large.
The compression set also increases, and the tear strength at high temperature examples decreases significantly, which is a problem.
実験Ｎａ５，６．７．８．９．１０，１１．１２に本発
明を使用した硫黄加硫による実施例を示す、いずれも−
３０℃以下の耐寒性と共に良好な感温性を示している。Examples of sulfur vulcanization using the present invention are shown in Experiment Na5, 6.7.8.9.10, and 11.12, all of which are -
It exhibits good temperature sensitivity as well as cold resistance below 30°C.
実験ＮＱ１４に本発明を使用したパーオキサイド加硫に
よる実施例を示す、実施例（実験＆？）と同等な良好な
耐寒性と感温性を示している。Experiment NQ14 shows an example using peroxide vulcanization using the present invention, and shows good cold resistance and temperature sensitivity equivalent to the example (experiment &?).
例示していないが、トランス−１，４−クロロブレンゴ
ムも本発明者が先に出願した特願昭６０−２２７５３７
号の［形状記憶性ゴム弾性体」の明細で明らかなように
すぐれた感温性を示すと云える。Although not exemplified, trans-1,4-chloroprene rubber is also available in Japanese Patent Application No. 60-227537 filed earlier by the present inventor.
As is clear from the specification of "Shape-memory rubber elastic material" in No. 1, it can be said that it exhibits excellent temperature sensitivity.
また、本実施例の天然ゴムの一部または全部をイソプレ
ンゴムやスチレンブタジェンゴム、ブタジェンゴムと置
きかえても充分な性能を有することは同業者ならば容易
に理解できる。Further, those skilled in the art will easily understand that sufficient performance can be achieved even if part or all of the natural rubber in this example is replaced with isoprene rubber, styrene-butadiene rubber, or butadiene rubber.
以上の例によって充分なゴム物性を保持した上に耐寒性
と感温性を有する本発明の優秀さは明白である。The above examples clearly demonstrate the superiority of the present invention, which not only maintains sufficient rubber physical properties but also has cold resistance and temperature sensitivity.
実施例２ 温度と剛性変化
こういった感温性ゴムにおいては、温度変化による硬さ
く剛性）変化が速やかに起こることが要求される。そこ
で、その剛性変化がどの程度のタイム・スケールで生じ
るかを、実験ＮＱ８の本発明配合で調べた結果を第１図
に示す。Example 2 Change in Temperature and Rigidity In such a temperature-sensitive rubber, changes in hardness and rigidity due to temperature changes are required to occur quickly. FIG. 1 shows the results of an investigation using the formulation of the present invention in Experiment NQ8 to find out on what time scale the stiffness change occurs.
本テストでは、２腸／−厚のＪＩＳＫ−６３０１のダン
ベル３号型試験片を使用し、５０℃の温湯と１０℃の冷
水を使用して、それぞれ３０秒浬潰した後の静的応力変
化を測定している。この図からもわかる様に。In this test, a JISK-6301 dumbbell type 3 test piece with a thickness of 2 cm/- was used, and the static stress change after crushing it for 30 seconds using 50°C hot water and 10°C cold water. are being measured. As you can see from this diagram.
わずか３０秒のタイム・スケールで大きく、剛性が変化
しており、充分早い速度で、大きな剛性変化が得られる
事がわかる。It can be seen that the stiffness changes significantly in a time scale of only 30 seconds, and that a large change in stiffness can be obtained at a sufficiently fast speed.
また、冷却の際にさまざまな形状に変形させて数装置い
たところ形状が固定され、熱水に戻すと元の形状にもど
るという形状記憶効果をも示した。They also demonstrated a shape-memory effect in that when they were deformed into various shapes during cooling, the shape was fixed after several devices, and when they were returned to hot water, they returned to their original shape.
〈発明の効果〉
以上説明してきた様に１本発明においてはゴム成分とし
て特定の結合ｍ位を有するジエン系ゴム３０〜９０重量
部と、天然ゴム及びジエン系合成ゴムからなる群から選
ばれた少なくとも一種のゴム７０〜１０重量部を混合し
たブレンドゴムに加硫剤を配合して得られたゴム組成物
は、第１表からも明らかな如く感温性とともにゴム物性
や耐寒性が改善されるという効果が得られた。<Effects of the Invention> As explained above, in the present invention, the rubber component is 30 to 90 parts by weight of a diene rubber having a specific bond at the m position, and a rubber selected from the group consisting of natural rubber and diene synthetic rubber. As is clear from Table 1, the rubber composition obtained by blending a vulcanizing agent with a blended rubber containing 70 to 10 parts by weight of at least one type of rubber has improved temperature sensitivity, rubber physical properties, and cold resistance. The effect was obtained.
かかる本発明のゴム組成物は、感温性と共に耐寒性が必
要な例えば氷雪路用スパイクタイヤトレッドの一部分や
タイヤに巻きつけて使用するすベリ止め用タイヤチェー
ンや、ＷＬ度によって剛性が変化する防振ゴムなどにも
使用できる。The rubber composition of the present invention is suitable for use in, for example, a part of a spike tire tread for icy and snowy roads that requires both temperature sensitivity and cold resistance, a tire chain for preventing slipping that is wrapped around a tire, and the rigidity of which changes depending on the WL degree. It can also be used as anti-vibration rubber.
さらに、本発明のゴム組成物は温度変化によるすぐれた
形状記憶効果をも有するので形状記憶性を利用した建材
、玩具など多くの用途に使用出来る。Furthermore, the rubber composition of the present invention also has an excellent shape memory effect due to temperature changes, so it can be used in many applications such as building materials and toys that utilize shape memory.
第１図は静的応力と伸びの関係を示すグラフである。 以上 FIG. 1 is a graph showing the relationship between static stress and elongation. that's all
Claims (1)
化度が２０〜５０％、ガラス転移温度が−３０℃以下の
ジエン系ゴム３０〜９０重量部と、天然ゴムおよびその
他のジエン系合成ゴムから選ばれた少なくとも一種のゴ
ム７０〜１０重量部を混合したブレンドゴムに加硫剤を
含有してなる感温性ゴム組成物。 ２ トランス−１，４結合単位が９０モル％以上で結晶
化度が２０〜５０％、ガラス転移温度が−３０℃以下の
ジエン系ゴムが合成イソプレンゴムであり、加硫剤が０
．１〜１重量部の硫黄である特許請求の範囲第１項記載
の感温性ゴム組成物。[Scope of Claims] 1. 30 to 90 parts by weight of a diene rubber containing 90 mol% or more of trans-1,4 bond units, a crystallinity of 20 to 50%, and a glass transition temperature of -30°C or less, and natural rubber. A temperature-sensitive rubber composition comprising a blended rubber obtained by mixing 70 to 10 parts by weight of at least one type of rubber selected from diene-based synthetic rubbers and other diene-based synthetic rubbers, and a vulcanizing agent. 2 A diene rubber containing 90 mol% or more of trans-1,4 bond units, a crystallinity of 20 to 50%, and a glass transition temperature of -30°C or less is a synthetic isoprene rubber, and a vulcanizing agent is 0.
．． The temperature-sensitive rubber composition according to claim 1, which contains 1 to 1 part by weight of sulfur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19765086A JPS6354455A (en) | 1986-08-23 | 1986-08-23 | Temperature-sensitive rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19765086A JPS6354455A (en) | 1986-08-23 | 1986-08-23 | Temperature-sensitive rubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6354455A true JPS6354455A (en) | 1988-03-08 |
Family
ID=16378025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19765086A Pending JPS6354455A (en) | 1986-08-23 | 1986-08-23 | Temperature-sensitive rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6354455A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013515845A (en) * | 2009-12-30 | 2013-05-09 | ミシュラン ルシェルシュ エ テクニーク ソシエテ アノニム | Rubber composition and organic salt curing agent |
| JP2013091688A (en) * | 2011-10-24 | 2013-05-16 | Toyo Tire & Rubber Co Ltd | Rubber composition for vibration-proof rubber |
| JP2020066640A (en) * | 2018-10-19 | 2020-04-30 | 株式会社ブリヂストン | Rubber composition for actuator, vulcanized rubber for actuator and actuator |
| JP2020066641A (en) * | 2018-10-19 | 2020-04-30 | 株式会社ブリヂストン | Rubber composition for actuator, vulcanized rubber for actuator and actuator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088150A (en) * | 1973-10-11 | 1975-07-15 | ||
| JPS57100146A (en) * | 1980-12-16 | 1982-06-22 | Asahi Chem Ind Co Ltd | Novel rubber composition |
| JPS5821434A (en) * | 1981-07-31 | 1983-02-08 | Japan Synthetic Rubber Co Ltd | Polybutadiene rubber composition |
| JPS61143453A (en) * | 1984-12-18 | 1986-07-01 | Yokohama Rubber Co Ltd:The | Rubber composition for tire tread use |
-
1986
- 1986-08-23 JP JP19765086A patent/JPS6354455A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088150A (en) * | 1973-10-11 | 1975-07-15 | ||
| JPS57100146A (en) * | 1980-12-16 | 1982-06-22 | Asahi Chem Ind Co Ltd | Novel rubber composition |
| JPS5821434A (en) * | 1981-07-31 | 1983-02-08 | Japan Synthetic Rubber Co Ltd | Polybutadiene rubber composition |
| JPS61143453A (en) * | 1984-12-18 | 1986-07-01 | Yokohama Rubber Co Ltd:The | Rubber composition for tire tread use |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013515845A (en) * | 2009-12-30 | 2013-05-09 | ミシュラン ルシェルシュ エ テクニーク ソシエテ アノニム | Rubber composition and organic salt curing agent |
| JP2013091688A (en) * | 2011-10-24 | 2013-05-16 | Toyo Tire & Rubber Co Ltd | Rubber composition for vibration-proof rubber |
| JP2020066640A (en) * | 2018-10-19 | 2020-04-30 | 株式会社ブリヂストン | Rubber composition for actuator, vulcanized rubber for actuator and actuator |
| JP2020066641A (en) * | 2018-10-19 | 2020-04-30 | 株式会社ブリヂストン | Rubber composition for actuator, vulcanized rubber for actuator and actuator |
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