JPH0686554B2 - Ethylene-propylene rubber composition - Google Patents
Ethylene-propylene rubber compositionInfo
- Publication number
- JPH0686554B2 JPH0686554B2 JP60125241A JP12524185A JPH0686554B2 JP H0686554 B2 JPH0686554 B2 JP H0686554B2 JP 60125241 A JP60125241 A JP 60125241A JP 12524185 A JP12524185 A JP 12524185A JP H0686554 B2 JPH0686554 B2 JP H0686554B2
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- rubber
- propylene
- propylene rubber
- rubber composition
- 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
- 229920000181 Ethylene propylene rubber Polymers 0.000 title claims description 13
- 239000000203 mixture Substances 0.000 title claims description 13
- 229920006168 hydrated nitrile rubber Polymers 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 150000001451 organic peroxides Chemical class 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 description 15
- 239000005060 rubber Substances 0.000 description 15
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000004898 kneading Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005984 hydrogenation reaction Methods 0.000 description 5
- 229920002943 EPDM rubber Polymers 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- AHAREKHAZNPPMI-UHFFFAOYSA-N hexa-1,3-diene Chemical compound CCC=CC=C AHAREKHAZNPPMI-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- -1 organic peroxide Peroxide Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- 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、エチレン−プロピレン系ゴム組成物に関す
る。更に詳しくは、加工性にすぐれ、シール用材料など
として好適に用いられるエチレン−プロピレン系ゴム組
成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ethylene-propylene rubber composition. More specifically, it relates to an ethylene-propylene rubber composition which has excellent processability and is preferably used as a sealing material.
エチレン−プロピレン共重合ゴム（EPM）またはこれに
エチリデンノルボルネン、ジシクロペンタジエン、1,4
−ヘキサジエンなどのジエン成分を共重合させたエチレ
ン−プロピレン−ジエン３元共重合ゴム（EPDM）である
エチレン−プロピレン系ゴムは、耐熱性、耐候性、耐水
性、耐圧縮永久歪などの特性の点においてすぐれている
が、加工性が悪いという欠点を有している。Ethylene-propylene copolymer rubber (EPM) or ethylidene norbornene, dicyclopentadiene, 1,4
-Ethylene-propylene rubber, which is an ethylene-propylene-diene terpolymer (EPDM) copolymerized with a diene component such as hexadiene, has properties such as heat resistance, weather resistance, water resistance, and compression set resistance. Although it is excellent in terms, it has the drawback of poor workability.
即ち、重合体の性質上、ロール粘着性がないためロール
加工性が悪く、生地の表面も凹凸状態となり、生地の寸
法安定性もよくないため加硫時の生地不足などを生じ、
またゴムベルトも切断され易く、これが切断されるとロ
ール混練ができなくなるなど、加工性の点で種々の問題
を有している。That is, due to the nature of the polymer, the roll workability is poor because there is no roll tackiness, the surface of the dough becomes uneven, and the dimensional stability of the dough is not good, causing a lack of dough during vulcanization,
Further, the rubber belt is also easily cut, and if it is cut, roll kneading cannot be performed.
こうした加工上の問題は、密閉式混練機を用い、エチレ
ン−プロピレン系ゴムにプロセスオイルなどを配合した
場合にはある程度の解決が図れるが、これ以外の場合に
は十分な加工性の向上が期待できないばかりか、添加剤
の配合による物性値の大幅な低下という新たな問題を生
ずる。These processing problems can be solved to a certain extent when a process oil or the like is mixed with ethylene-propylene rubber using a closed kneader, but in other cases, sufficient improvement of processability is expected. In addition to that, a new problem arises in that the physical properties are significantly reduced by the addition of additives.
本発明者は、物性値を実質的に低下させることなく、エ
チレン−プロピレン系ゴムの加工性を改善せしめる方法
について種々検討を行なつた結果、固形の水素添加アク
リロニトリル−ブタジエンゴムを配合せしめることが非
常に有効であることを見出した。The present inventor has conducted various studies on a method for improving the processability of ethylene-propylene rubber without substantially lowering the physical property values, and as a result, it is possible to incorporate solid hydrogenated acrylonitrile-butadiene rubber. It was found to be very effective.
〔問題点を解決するための手段〕および〔作用〕 従つて、本発明はエチレン−プロピレン系ゴム組成物に
係り、このエチレン−プロピレン系ゴム組成物は、エチ
レン−プロピレン系ゴム85〜95重量％および固形の水素
添加アクリロニトリル−ブタジエンゴム15〜５重量％の
混合物に有機過酸化物を添加してなる。[Means for Solving Problems] and [Action] Accordingly, the present invention relates to an ethylene-propylene rubber composition, and the ethylene-propylene rubber composition has an ethylene-propylene rubber content of 85 to 95% by weight. And a solid hydrogenated acrylonitrile-butadiene rubber mixture of 15 to 5% by weight of organic peroxide.
ここで用いられる固形の水素添加アクリロニトリル−ブ
タジエンゴムは、アクリロニトリル−ブタジエン共重合
体中のブタジエンの二重結合を水素化したものであり、
水素化率約80％以上で化学的安定性を示し、特に耐熱
性、耐薬品性の点ですぐれており、またゴム強度も強い
という性質を有している。耐熱性についていえば、水素
化率の高いもの程耐熱性がすぐれており、従つて水素化
率100％のものを用いることが好ましいが、要求される
耐熱性の程度、コストなどの点から、多少水素化率の低
い固形の水素添加アクリロニトリル−ブタジエンゴムを
用いても、加工性にはあまり影響しない。The solid hydrogenated acrylonitrile-butadiene rubber used here is a hydrogenated double bond of butadiene in an acrylonitrile-butadiene copolymer,
It exhibits chemical stability at a hydrogenation rate of about 80% or more, is particularly excellent in heat resistance and chemical resistance, and has the property of strong rubber strength. In terms of heat resistance, the higher the hydrogenation rate, the better the heat resistance, and therefore it is preferable to use the one with a hydrogenation rate of 100%, but in terms of the required degree of heat resistance and cost, Even if a solid hydrogenated acrylonitrile-butadiene rubber having a slightly low hydrogenation rate is used, the processability is not so affected.
エチレン−プロピレン系ゴムに固形の水素添加アクリロ
ニトリル−ブタジエンゴムを混合すると、密閉式の混練
機などを用いなくとも、すぐれた加工性を有するゴム組
成物が得られる。具体的には、ロール混練において、ゴ
ムベルトが切断することなく、容易に混練が行われる。
また、生地表面の凹凸も少なくなり、生地の寸法安定性
が著しく改善される。By mixing solid hydrogenated acrylonitrile-butadiene rubber with ethylene-propylene rubber, a rubber composition having excellent processability can be obtained without using a closed kneader. Specifically, in roll kneading, kneading is easily performed without cutting the rubber belt.
In addition, the unevenness of the cloth surface is reduced, and the dimensional stability of the cloth is significantly improved.
このような効果は、固形の水素添加アクリロニトリル−
ブタジエンゴムを組成物中約５〜15重量％占めるような
割合で用いたときに得られる。約５重量％より少ない配
合量では、ロール加工性の向上が期待できず、その配合
割合を増加させるに従つて得られる効果は大となるが、
約15重量％をこえるあたりからは、耐圧縮永久歪性が悪
くなる。物性、加工性およびコストなどを総合的に勘案
すると、15重量％以下、一般には約10重量％程度配合し
て用いることが好ましく、特に耐圧縮永久歪が良好であ
ることが要求されるような用途には、約10重量％以下の
割合で用いることが望ましい。Such an effect is obtained by solid hydrogenated acrylonitrile-
Obtained when the butadiene rubber is used in such a proportion that it makes up about 5 to 15% by weight of the composition. When the compounding amount is less than about 5% by weight, the roll processability cannot be expected to be improved, and the effect obtained by increasing the compounding ratio becomes large, but
When it exceeds about 15% by weight, the compression set resistance becomes poor. Considering comprehensively the physical properties, processability, cost, etc., it is preferable to use 15% by weight or less, generally about 10% by weight, and it is particularly required that the compression set resistance is good. For use, it is desirable to use at a ratio of about 10% by weight or less.
混練は、一般にオープンロールなどを用い、室温乃至約
30℃のロールに約5mmの厚さで重合体成分の素練りを約
２分間行ない、ゴムベルト厚を約２〜15mmとし、架橋
剤、共架橋剤およびオイルを除く他の充填剤を約20〜30
分間の間に少量宛投入し、プロセスオイルを添加する場
合にはこの後に少量宛投入し、次いで架橋剤および共架
橋剤を約10分間の間に少量宛投入することにより行われ
る。この間、常時約10l/分程度の水量の冷却水を流して
おくが、混練終了時の温度は約50〜70℃となつている。For the kneading, generally, an open roll or the like is used, and the temperature is from room temperature to about
The polymer component is kneaded for about 2 minutes on a roll at 30 ° C with a thickness of about 5 mm, the rubber belt thickness is about 2-15 mm, and other fillers other than the cross-linking agent, co-cross-linking agent and oil are about 20- 30
It is carried out by pouring in a small amount during the period of time, then pouring in a small amount when the process oil is added, and then pouring a small amount of the cross-linking agent and the co-crosslinking agent in about 10 minutes. During this period, cooling water having a water content of about 10 l / min is constantly supplied, but the temperature at the end of kneading is about 50 to 70 ° C.
架橋反応は、エチレン−プロピレン共重合ゴム、水素化
率100％の固形の水素添加アクリロニトリル−ブタジエ
ンゴムを用いた場合には有機過酸化物によるパーオキサ
イド架橋が行われるが、エチレン−プロピレン−ジエン
３元共重合ゴム、完全に水素化されていない水素添加ア
クリロニトリル−ブタジエンゴムを用いた場合にはイオ
ウ架橋も可能であるものの、耐熱性、低圧縮永久歪など
が求められる場合には、有機過酸化物によるパーオキサ
イド架橋が好ましい。In the crosslinking reaction, when ethylene-propylene copolymer rubber or solid hydrogenated acrylonitrile-butadiene rubber having a hydrogenation rate of 100% is used, peroxide crosslinking with organic peroxide is carried out, but ethylene-propylene-diene 3 Sulfur cross-linking is possible when using original copolymer rubber or hydrogenated acrylonitrile-butadiene rubber that is not completely hydrogenated, but when heat resistance and low compression set are required, organic peroxide Peroxide cross-linking by a substance is preferable.
エチレン−プロピレン系ゴムは、前述の如く耐熱性、耐
候性、耐水性などにすぐれ、有機過酸化物によるパーオ
キサイド架橋物は圧縮永久歪も小さいので、Ｏ−リン
グ、パツキン、ガスケツトなどのシール材料として用い
られてきたが、こうしたすぐれた諸物性を実質的に損な
うことなくあるいは引張り強さなどを逆に改良しなが
ら、加工性を著しく改善せしめることが、固形の水素添
加アクリロニトリル−ブタジエンゴムの混合により達成
された。The ethylene-propylene rubber has excellent heat resistance, weather resistance, water resistance, etc. as described above, and since the peroxide cross-linked product of organic peroxide has a small compression set, it is a sealing material for O-rings, packings, gaskets, etc. Although it has been used as a mixture of solid hydrogenated acrylonitrile-butadiene rubber, it is possible to remarkably improve the workability without substantially impairing these excellent physical properties or while conversely improving the tensile strength and the like. Achieved by
次に、実施例について本発明を説明する。 Next, the present invention will be described with reference to examples.
実施例 後記表に示される配合組成の組成物を、12インチオープ
ンロールを用いて前述の如き混練方法により混練し、混
練物について180℃で６分間の条件下で架橋を行ない、J
IS 4号ダンベルを作製し、その際のロール加工性および
生地表面状態の評価を行ない、その結果を表に併記し
た。Example A composition having the composition shown in the table below was kneaded by a kneading method as described above using a 12 inch open roll, and the kneaded material was crosslinked at 180 ° C. for 6 minutes.
IS No. 4 dumbbells were prepared, roll workability and surface condition of the fabric were evaluated, and the results are also shown in the table.
（ロール加工性の評価） ○：ゴムベルト厚10mm以上で支障なく混練できる状態 △：ゴムベルト厚５〜10mmで支障なく混練できる状態 ×：ゴムベルト厚5mm以下で支障なく混練できる状態 （生地表面状態の評価） ○：凹凸殆んどなし、表面粗さは1mm以下 △：凹凸多少あり、表面粗さは約5mm程度 ×：凹凸かなり激しく、穴あきあり 表の結果は、次のようなことを示している。(Evaluation of roll processability) ○: Rubber belt thickness of 10 mm or more can be kneaded without trouble △: Rubber belt thickness of 5 to 10 mm can be kneaded without trouble ×: Rubber belt thickness of 5 mm or less can be kneaded without trouble (evaluation of dough surface state ) ○: Almost no unevenness, surface roughness is 1 mm or less △: There is some unevenness, surface roughness is about 5 mm ×: Roughness is quite severe and there are holes. The results in the table show the following. There is.
比較例1:加工性の改善効果が多少得られ、物性値はエチ
レン−プロピレン−ジエン（エチリデンノルボルネン）
３元共重合ゴムと同等である。Comparative Example 1: Some improvement in workability was obtained, and the physical properties were ethylene-propylene-diene (ethylidene norbornene).
It is equivalent to terpolymer rubber.
実施例、比較例２〜4:固形の水素添加アクリロニトリル
−ブタジエンゴムの配合割合を増すと加工性は更に改善
される。ただし、配合割合の増加と共に圧縮永久歪は次
第に悪くなるが、耐熱性はエチレン−プロピレン−ジエ
ン３元共重合ゴムと同等である。長期にわたり３元共重
合ゴムと同等の圧縮永久歪の値を得るためには、その配
合割合は15重量％以下、好ましくは約10重量％以下にど
とめることが望ましい。Examples, Comparative Examples 2 to 4: Workability is further improved by increasing the compounding ratio of solid hydrogenated acrylonitrile-butadiene rubber. However, although the compression set gradually deteriorates as the blending ratio increases, the heat resistance is equivalent to that of the ethylene-propylene-diene terpolymer rubber. In order to obtain a value of compression set equivalent to that of the terpolymer rubber over a long period of time, it is desirable that the compounding ratio is 15% by weight or less, preferably about 10% by weight or less.
比較例4:エチレン−プロピレン−ジエン３元共重合ゴム
単体では、物性的にはすぐれているが、加工性が悪い。Comparative Example 4: The ethylene-propylene-diene terpolymer rubber alone has excellent physical properties but poor processability.
比較例5:粘着付与剤の添加のみでは、加工性の大きな改
善が得られず、圧縮永久歪は著しく悪くなる。Comparative Example 5: Only by adding the tackifier, the processability cannot be significantly improved, and the compression set is significantly deteriorated.
比較例6:粘着付与剤に更に軟化剤を併用すると、適度の
加工性は得られるが、耐熱性、耐圧縮永久歪の大幅な低
下がみられる。Comparative Example 6: When a tackifier is used in combination with a softening agent, proper processability is obtained, but heat resistance and compression set resistance are significantly reduced.
Claims (1)
および固形の水素添加アクリロニトリル−ブタジエンゴ
ム15〜５重量％の混合物に有機過酸化物を添加してなる
エチレン−プロピレン系ゴム組成物。1. Ethylene-propylene rubber 85-95% by weight
And an ethylene-propylene rubber composition obtained by adding an organic peroxide to a mixture of solid hydrogenated acrylonitrile-butadiene rubber 15 to 5% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60125241A JPH0686554B2 (en) | 1985-06-11 | 1985-06-11 | Ethylene-propylene rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60125241A JPH0686554B2 (en) | 1985-06-11 | 1985-06-11 | Ethylene-propylene rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61283639A JPS61283639A (en) | 1986-12-13 |
| JPH0686554B2 true JPH0686554B2 (en) | 1994-11-02 |
Family
ID=14905278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60125241A Expired - Lifetime JPH0686554B2 (en) | 1985-06-11 | 1985-06-11 | Ethylene-propylene rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686554B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997016484A1 (en) * | 1995-10-31 | 1997-05-09 | Nippon Zeon Co., Ltd. | RUBBER COMPOSITION COMPRISING HIGHLY SATURATED NITRILE COPOLYMER RUBBER AND ETHYLENE-α-OLEFIN COPOLYMER RUBBER |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53136053A (en) * | 1977-04-30 | 1978-11-28 | Toyoda Gosei Co Ltd | Rubber composition |
| JPS5840332A (en) * | 1981-09-02 | 1983-03-09 | Nippon Zeon Co Ltd | Covulcanizable rubber composition |
| JPS59102941A (en) * | 1982-12-03 | 1984-06-14 | Kuraray Co Ltd | Rubber composition |
| DE3345249A1 (en) * | 1983-12-14 | 1985-06-27 | Bayer Ag, 5090 Leverkusen | POLYMER MIXTURES AND COVULCANISES MADE THEREOF |
| JPS61228033A (en) * | 1985-04-01 | 1986-10-11 | Kuraray Co Ltd | Sponge rubber and production thereof |
-
1985
- 1985-06-11 JP JP60125241A patent/JPH0686554B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997016484A1 (en) * | 1995-10-31 | 1997-05-09 | Nippon Zeon Co., Ltd. | RUBBER COMPOSITION COMPRISING HIGHLY SATURATED NITRILE COPOLYMER RUBBER AND ETHYLENE-α-OLEFIN COPOLYMER RUBBER |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61283639A (en) | 1986-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |