JPH044240A - Oil-resistant rubber composition with excellent compression set - Google Patents
Oil-resistant rubber composition with excellent compression setInfo
- Publication number
- JPH044240A JPH044240A JP10671490A JP10671490A JPH044240A JP H044240 A JPH044240 A JP H044240A JP 10671490 A JP10671490 A JP 10671490A JP 10671490 A JP10671490 A JP 10671490A JP H044240 A JPH044240 A JP H044240A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- rubber
- parts
- acrylonitrile
- carboxylic acid
- 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 40
- 239000005060 rubber Substances 0.000 title claims abstract description 39
- 239000000203 mixture Substances 0.000 title claims abstract description 28
- 230000006835 compression Effects 0.000 title claims description 10
- 238000007906 compression Methods 0.000 title claims description 10
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 23
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011701 zinc Substances 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 claims abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 6
- 150000001451 organic peroxides Chemical class 0.000 claims abstract description 6
- 239000011777 magnesium Substances 0.000 claims abstract description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 159000000003 magnesium salts Chemical class 0.000 claims description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 150000003751 zinc Chemical class 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000005062 Polybutadiene Substances 0.000 abstract description 4
- 229920002857 polybutadiene Polymers 0.000 abstract description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract description 3
- 150000002681 magnesium compounds Chemical class 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- -1 methacrylic acid) Chemical class 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 7
- 239000003431 cross linking reagent Substances 0.000 description 5
- 235000014692 zinc oxide Nutrition 0.000 description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 235000012245 magnesium oxide Nutrition 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229910000010 zinc carbonate Inorganic materials 0.000 description 2
- 229940007718 zinc hydroxide Drugs 0.000 description 2
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- YNJSNEKCXVFDKW-UHFFFAOYSA-N 3-(5-amino-1h-indol-3-yl)-2-azaniumylpropanoate Chemical compound C1=C(N)C=C2C(CC(N)C(O)=O)=CNC2=C1 YNJSNEKCXVFDKW-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 101001024605 Homo sapiens Next to BRCA1 gene 1 protein Proteins 0.000 description 1
- 102100037001 Next to BRCA1 gene 1 protein Human genes 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 125000002897 diene group Chemical group 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 235000012254 magnesium hydroxide Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はアクリロニトリル−ブタジエンゴムを使用した
耐油性ゴム組成物の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in oil-resistant rubber compositions using acrylonitrile-butadiene rubber.
（従来の技術）
現在多種多様なプラスチックが製造され、工業用、その
他の材料として広く用いられているが、弾性を必要とす
る部位にはゴム材料か一般的に用いられている。現在で
は、ゴム材は単に弾性のみならず、他の特性も要求され
るようになってきた。(Prior Art) A wide variety of plastics are currently manufactured and widely used as industrial and other materials, but rubber materials are generally used for parts that require elasticity. Nowadays, rubber materials are required to have not only elastic properties but also other properties.
アクリロニトリル−ブタジエンゴム（ＮＢＲ）は本来耐
油性が良く、これを用いる用途も多いが、硬度が８０（
Ｊ Ｉ Ｓ−Ａ硬度）を越える高硬度のものはみられな
かった。Acrylonitrile-butadiene rubber (NBR) inherently has good oil resistance and is used for many applications, but its hardness is 80 (
No specimens with hardness exceeding JIS A hardness were found.
ウレタンゴムでは硬度８０（ＪＩＳ−Ａ硬度）を越える
ものが得られるが；耐油性が劣る。Urethane rubber can have a hardness exceeding 80 (JIS-A hardness); however, it has poor oil resistance.
（発明が解決しようとする課題）
本発明者等は既に高硬度でかつ耐油性を有するアクリロ
ニトリル−ブタジエンゴム組成物を提供した（特願平１
１９７４９８号）。本発明者は上記特許出願のゴム組成
物の圧縮永久歪を改善することを目的とする。(Problems to be Solved by the Invention) The present inventors have already provided an acrylonitrile-butadiene rubber composition having high hardness and oil resistance (Patent Application No.
No. 197498). The present inventor aims to improve the compression set of the rubber composition of the above patent application.
（課題を解決するための手段）
上記目的を達成するため、アクリロニトリルを高含量含
むアクリロニトリル−ブタジエンゴムをゴム成分として
用い、共架橋剤の量を減らせば、優れた効果を奏するこ
とを見いだし本発明を成すに至った。(Means for Solving the Problems) In order to achieve the above object, it has been discovered that excellent effects can be achieved by using acrylonitrile-butadiene rubber containing a high content of acrylonitrile as a rubber component and reducing the amount of co-crosslinking agent, and the present invention has been made. We have achieved this.
即ち、ゴム成分として高アクリロニトリルのアクリロニ
トリル−ブタジエンゴム１００重量部、炭素数３〜８の
α，β−不飽和カルボン酸ｌＯ重量部未満、亜鉛および
／またはマグネシウムの酸化物、水酸化物または炭酸塩
１−１０重量部および有機過酸化物１．５〜５重量部を
含有する圧縮永久歪の優れた耐油性ゴム組成物を提供す
る。That is, as rubber components, 100 parts by weight of acrylonitrile-butadiene rubber with high acrylonitrile content, less than 10 parts by weight of an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, and an oxide, hydroxide or carbonate of zinc and/or magnesium. An oil-resistant rubber composition containing 1 to 10 parts by weight and 1.5 to 5 parts by weight of an organic peroxide and having excellent compression set is provided.
本発明においてゴム成分として使用する高アクリロニト
リル含量のアクリロニトリル−ブタジエンゴム（ＮＢＲ
）はアクリロニトリルとブタジェンゴムの共重合体であ
って、アクリロニトリルを相対的に高含量含むものであ
る。アクリロニトリルの含有量は、３５重量％以上、特
に４０〜５０重量％が好ましい。３５重量％未貴だとゴ
ムの強度および耐油性が十分でなく好ましくない。また
、α，β−不飽和カルボン酸金属塩が反応し、強度特性
を向上させるためには、共役ジエン単位の含有量が３０
重量％以上が好ましい。好適な高アクリロニトリル含量
のＮＢＲは日本合
成ゴム（株）社から市販のＮ２１５ＳＬ Ｎ２２０５１
日本ゼオン（株）社から市販のＤＮ２０２Ｈ等が挙げら
れる。Acrylonitrile-butadiene rubber (NBR) with a high acrylonitrile content used as a rubber component in the present invention
) is a copolymer of acrylonitrile and butadiene rubber, and contains a relatively high content of acrylonitrile. The content of acrylonitrile is preferably 35% by weight or more, particularly 40 to 50% by weight. If the content is 35% by weight, the rubber will not have sufficient strength and oil resistance, which is undesirable. In addition, in order for the α,β-unsaturated carboxylic acid metal salt to react and improve the strength properties, the content of conjugated diene units must be 30
It is preferably at least % by weight. A suitable high acrylonitrile content NBR is N215SL N22051 available from Nihon Gosei Rubber Co., Ltd.
Examples include DN202H commercially available from Nippon Zeon Co., Ltd.
本発明に用いるゴム成分は上述のように高アクリロニト
リル含量のアクリロニトリル−ブタジエンゴム単独であ
ってもよいが、ブタジェンゴム、スチレン−ブタジェン
ゴムおよびエチレン−プロピレンゴムを混合してもよい
。ブタジェンゴム、スチレン−ブタジェンゴムおよびエ
チレン−プロピレンゴム（以下、他のゴムという。）を
配合した場合、耐油性とともに圧縮永久歪が更に向上す
る。The rubber component used in the present invention may be acrylonitrile-butadiene rubber with a high acrylonitrile content alone as described above, but it may also be a mixture of butadiene rubber, styrene-butadiene rubber and ethylene-propylene rubber. When butadiene rubber, styrene-butadiene rubber, and ethylene-propylene rubber (hereinafter referred to as other rubbers) are blended, oil resistance and compression set are further improved.
他のゴムと上記ＮＢＲの配合比は他のゴム／ＮＢＲの重
量比で５／９５〜４０／６０の範囲内が好ましい。The blending ratio of the other rubber and the above-mentioned NBR is preferably within the range of 5/95 to 40/60 in weight ratio of other rubber/NBR.
また耐熱性をあげるために、ゴム成分として水素化アク
リロニトリル−ブタジエンゴムを高アクリロニトリル含
量のＮＢＲに配合してもよい。水素化ＮＢＲと上記ＮＢ
Ｒとの配合比は水素化ＮＢＲ／Ｎ Ｂ Ｒの重量比で３
／９７〜３０／７０の範囲内が好ましい。Further, in order to improve heat resistance, hydrogenated acrylonitrile-butadiene rubber may be blended as a rubber component with NBR having a high acrylonitrile content. Hydrogenated NBR and the above NB
The blending ratio with R is hydrogenated NBR/NBR weight ratio of 3.
It is preferably within the range of /97 to 30/70.
本発明において用いられる炭素数３〜８のａ。a having 3 to 8 carbon atoms used in the present invention;
β−不飽和カルボン酸としてはメタクリル酸、アクリル
酸、イタコン酸、クロトン酸等が例示される。典型的に
はメタクリル酸である。Examples of the β-unsaturated carboxylic acid include methacrylic acid, acrylic acid, itaconic acid, and crotonic acid. Typically methacrylic acid.
亜鉛および／またはマグネシウムの酸化物、水酸化物ま
たは炭酸塩としては酸化亜鉛（亜鉛華）、水酸化亜鉛、
炭酸亜鉛、酸化マグネシウム、水酸化マグネシウム、炭
酸マグネシウムまたはそれらの混合物が例示され、酸化
亜鉛または酸化マグネシウムが特に好ましい。マグネシ
ウムの塩類を用いた場合、ゴム組成物の離型性が向上す
る。Zinc and/or magnesium oxides, hydroxides or carbonates include zinc oxide (zinc white), zinc hydroxide,
Examples include zinc carbonate, magnesium oxide, magnesium hydroxide, magnesium carbonate, or mixtures thereof, with zinc oxide or magnesium oxide being particularly preferred. When magnesium salts are used, the mold releasability of the rubber composition is improved.
本発明の組成物に配合する有機過酸化物は過安息香酸、
過酸化ベンゾイル、クメンパーオキシド、ジクミルパー
オキシド等が挙げられる。好ましくはジクミルパーオキ
シドである。The organic peroxides blended into the composition of the present invention are perbenzoic acid,
Examples include benzoyl peroxide, cumene peroxide, dicumyl peroxide, and the like. Preferred is dicumyl peroxide.
本発明の組成においてＮＢＲ１００重量部に対し、α、
β−不飽和カルボン酸は１０重量部未満、好ましくは５
〜９重量部である。１０重量部以上だと圧縮永久歪が悪
くなる。亜鉛及び／又はマグネシウムの酸化物、水酸化
物もしくは炭酸塩は上記カルボン酸と反応し亜鉛塩を生
成するために用いられるもので上記カルボン酸量により
定まりほぼ、１−１０重量部、好ましくは５〜９重量部
である。１重量部より少ないと、高硬度は得られず、ま
た１０重量部を越えると未反応の亜鉛酸化物、水酸化物
もしくは炭酸塩が充填剤として残存するので好ましくな
い。有機過酸化物は１．５〜５重量部、好ましくは２〜
３重量部である。１．５重量部より少ないと高硬度が得
にくくまた圧縮永久歪が大きくなり好ましくない。又、
５重量部を越えるともろくなり実用的でない。In the composition of the present invention, α,
The β-unsaturated carboxylic acid is less than 10 parts by weight, preferably 5 parts by weight.
~9 parts by weight. If it exceeds 10 parts by weight, compression set will be poor. The oxide, hydroxide or carbonate of zinc and/or magnesium is used to react with the above carboxylic acid to produce a zinc salt, and is determined by the amount of the above carboxylic acid, approximately 1-10 parts by weight, preferably 5 parts by weight. ~9 parts by weight. If it is less than 1 part by weight, high hardness cannot be obtained, and if it exceeds 10 parts by weight, unreacted zinc oxide, hydroxide or carbonate will remain as a filler, which is not preferable. The amount of organic peroxide is 1.5 to 5 parts by weight, preferably 2 to 5 parts by weight.
It is 3 parts by weight. If it is less than 1.5 parts by weight, it is difficult to obtain high hardness and compression set becomes large, which is not preferable. or,
If it exceeds 5 parts by weight, it becomes brittle and is not practical.
上記ゴム組成中、本発明では特に炭素数３〜８のα、β
−不飽和カルボン酸と亜鉛及び／又はマグネシウム化合
物を添加する。これらの成分はゴム組成物中で反応して
、σ、β−モノエチレン性不飽和カルボン酸の亜鉛塩若
しくはマグネシウム塩を形成するものと思われる。この
α，β−不飽和カルボン酸の亜鉛若しくはマグネシウム
塩はＮＢＲ中の不飽和結合と反応して、架橋を形成し、
即ち、共架橋剤的働きをしてゴムの硬度をより高くする
ものと考えられる。この点から考えると、上記σ、β−
不飽和カルボン酸の亜鉛塩若しくはマグネシウム塩を予
め生成して、即ちゴム組成物外で生成して、ゴム組成物
中に配合することも可能となる。この場合、上記不飽和
カルボン酸の亜鉛塩若しくはマグネシウム塩はＮＢＲ１
００重量部に対し２重量部以上、２０重量部未満、好ま
しくは１０〜１８重量部の量で用いる。２重量部より少
ないと硬度が不足し、２０重量部以上だと圧縮永久歪が
大きくなる。In the above rubber composition, in the present invention, α and β having 3 to 8 carbon atoms are particularly used.
- Adding an unsaturated carboxylic acid and a zinc and/or magnesium compound. It is believed that these components react in the rubber composition to form the zinc or magnesium salt of the σ,β-monoethylenically unsaturated carboxylic acid. The zinc or magnesium salt of this α,β-unsaturated carboxylic acid reacts with the unsaturated bonds in NBR to form a crosslink,
That is, it is thought to act as a co-crosslinking agent to further increase the hardness of the rubber. Considering this point, the above σ, β−
It is also possible to generate the zinc or magnesium salt of the unsaturated carboxylic acid in advance, ie, outside the rubber composition, and then incorporate it into the rubber composition. In this case, the zinc salt or magnesium salt of the unsaturated carboxylic acid has NBR1
It is used in an amount of 2 parts by weight or more and less than 20 parts by weight, preferably 10 to 18 parts by weight. If it is less than 2 parts by weight, hardness will be insufficient, and if it is more than 20 parts by weight, compression set will become large.
本発明のゴム組成物には更に種々の添加剤、例えば老化
防止剤、補強剤、充填剤、顔料等を配合してもよい。こ
れらは通常、ゴムの性能に悪影響を与えない範囲内で加
えられる。The rubber composition of the present invention may further contain various additives such as anti-aging agents, reinforcing agents, fillers, pigments, etc. These are usually added within a range that does not adversely affect the performance of the rubber.
本発明のゴム組成物は上記成分をニーダ−、ロール等で
均一に混合することにより得られる。The rubber composition of the present invention can be obtained by uniformly mixing the above components using a kneader, roll, etc.
得られたゴム組成物は型内で加熱加硫される。The obtained rubber composition is heated and vulcanized in a mold.
加硫は通常１５０〜１７０℃で２０〜４０分実施される
。Vulcanization is usually carried out at 150-170°C for 20-40 minutes.
（発明の効果）
本発明のゴム組成物においてはアクリロニトリルを多く
含むアクリロニトリル−ブタジェン共重合体ゴムを使用
するため、共架橋剤の量を減らしても十分な硬度を有し
、引張り強さ・引裂強さ等の強度に優れ、同時に破断時
の伸びも大きく、更に耐油性も向上する。また、共架橋
剤の量を減らすことが可能になることより、圧縮永久歪
を小さくすることができる。(Effect of the invention) Since the rubber composition of the present invention uses acrylonitrile-butadiene copolymer rubber containing a large amount of acrylonitrile, it has sufficient hardness even with a reduced amount of co-crosslinking agent, and has high tensile strength and tear resistance. It has excellent strength, has high elongation at break, and has improved oil resistance. Furthermore, since it becomes possible to reduce the amount of co-crosslinking agent, compression set can be reduced.
［実施例］ 以下実施例により本発明を更に詳しく説明する。[Example] The present invention will be explained in more detail with reference to Examples below.
ゴム組成物の調製
（実施例１〜３及び比較例１〜４）
表−２に示すように、アクリロニトリル−ブタジエンゴ
ム（ＮＢＲ）、塩基性メタクリル酸亜鉛、及びジクミル
パーオキサイドをニーダ−で均一に混練し本発明のゴム
組成物を得た。これを型に入れ１６０℃で３０分間加熱
形成した。得られた各ゴムの物性を表−２に示す。Preparation of rubber compositions (Examples 1 to 3 and Comparative Examples 1 to 4) As shown in Table 2, acrylonitrile-butadiene rubber (NBR), basic zinc methacrylate, and dicumyl peroxide were uniformly mixed in a kneader. The rubber composition of the present invention was obtained by kneading. This was placed in a mold and heated at 160° C. for 30 minutes. Table 2 shows the physical properties of each rubber obtained.
”：Ｎ２５Ｏ５，日本ゼオン（株）製。”: N25O5, manufactured by Nippon Zeon Co., Ltd.
”：Ｎ２３０Ｓ、日本ゼオン（株）製。”: N230S, manufactured by Nippon Zeon Co., Ltd.
” ： Ｎ２１５ＳＬ、日本ゼオン（株）製。”: N215SL, manufactured by Nippon Zeon Co., Ltd.
４１〜７３：Ｊ夏Ｓ−に６３０１に準じインストロン引
張試験機にて試験。41-73: Tested on J Summer S- using an Instron tensile tester according to 6301.
８）：試験をＡＳＴＭ ＯＩ Ｌ＃３に７０°Ｃで１０
０時間浸漬後、重量変化率を測定した。8): Test to ASTM OI L#3 at 70°C for 10
After immersion for 0 hours, the weight change rate was measured.
９）：厚さの２５％（７０℃−２２時間）に圧縮した時
の残留歪を表わす。9): Represents the residual strain when compressed to 25% of the thickness (70° C. for 22 hours).
表−２から明らかなように、実施例１〜３のゴム組成物
は高含量アクリロニトリル−ブタジエンゴムを使用する
ため、比較例１のゴム組成物に比し引張・引裂強度、伸
び、及び耐油性に優れる。As is clear from Table 2, since the rubber compositions of Examples 1 to 3 use high-content acrylonitrile-butadiene rubber, they have better tensile/tear strength, elongation, and oil resistance than the rubber composition of Comparative Example 1. Excellent in
又実施例１〜３のゴム組成物は比較例２〜３のそれらよ
り少ない量の共架橋剤である塩基性メタクリル酸亜鉛を
使用するため、圧縮永久歪が小さい。Furthermore, since the rubber compositions of Examples 1 to 3 use a smaller amount of basic zinc methacrylate as a co-crosslinking agent than those of Comparative Examples 2 to 3, the compression set is small.
特許出願人 住友ゴム工業株式会社Patent applicant: Sumitomo Rubber Industries, Ltd.
Claims (1)
リル−ブタジエンゴム１００重量部、炭素数３〜８のα
，β−不飽和カルボン酸１０重量部未満、亜鉛および／
またはマグネシウムの酸化物、水酸化物または炭酸塩１
−１０重量部および有機過酸化物１．５〜５重量部を含
有する圧縮永久歪の優れた耐油性ゴム組成物。 ２、炭素数３〜８のα，β−不飽和カルボン酸と亜鉛及
び／又はマグネシウムの酸化物、水酸化物または炭酸塩
の代わりに、炭素数３〜８のα，β−不飽和カルボン酸
の亜鉛塩および／またはマグネシウム塩を２重量部以上
、２０重量部未満配合する請求項１に記載のゴム組成物
。[Claims] 1. 100 parts by weight of acrylonitrile-butadiene rubber with high acrylonitrile content as rubber components, α having 3 to 8 carbon atoms;
, less than 10 parts by weight of β-unsaturated carboxylic acid, zinc and/or
or magnesium oxide, hydroxide or carbonate 1
- An oil-resistant rubber composition with excellent compression set, containing 10 parts by weight and 1.5 to 5 parts by weight of an organic peroxide. 2. α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms instead of α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and oxide, hydroxide or carbonate of zinc and/or magnesium 2. The rubber composition according to claim 1, which contains at least 2 parts by weight and less than 20 parts by weight of zinc salt and/or magnesium salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10671490A JPH044240A (en) | 1990-04-23 | 1990-04-23 | Oil-resistant rubber composition with excellent compression set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10671490A JPH044240A (en) | 1990-04-23 | 1990-04-23 | Oil-resistant rubber composition with excellent compression set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH044240A true JPH044240A (en) | 1992-01-08 |
Family
ID=14440628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10671490A Pending JPH044240A (en) | 1990-04-23 | 1990-04-23 | Oil-resistant rubber composition with excellent compression set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH044240A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022947A1 (en) * | 1993-03-31 | 1994-10-13 | Nippon Zeon Co., Ltd. | Vulcanizable rubber composition |
| US5610217A (en) * | 1994-10-31 | 1997-03-11 | The Gates Corporation | Ethylene-alpha-olefin belting |
| US6057395A (en) * | 1996-01-31 | 2000-05-02 | Nippon Zeon Co., Ltd. | Rubber composition lowered in heat build-up |
| WO2003029341A1 (en) * | 2001-09-28 | 2003-04-10 | Zeon Corporation | Rubber composition comprising nitrile copolymer rubber, metal salt of ethylenically unsaturated carboxylic acid, and organic peroxide, and vulcanizate thereof |
-
1990
- 1990-04-23 JP JP10671490A patent/JPH044240A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022947A1 (en) * | 1993-03-31 | 1994-10-13 | Nippon Zeon Co., Ltd. | Vulcanizable rubber composition |
| US5756586A (en) * | 1993-03-31 | 1998-05-26 | Nippon Zeon Co., Ltd. | Vulcanizable rubber composition with unsaturated and metal compounds and organic peroxides |
| US5610217A (en) * | 1994-10-31 | 1997-03-11 | The Gates Corporation | Ethylene-alpha-olefin belting |
| US6057395A (en) * | 1996-01-31 | 2000-05-02 | Nippon Zeon Co., Ltd. | Rubber composition lowered in heat build-up |
| WO2003029341A1 (en) * | 2001-09-28 | 2003-04-10 | Zeon Corporation | Rubber composition comprising nitrile copolymer rubber, metal salt of ethylenically unsaturated carboxylic acid, and organic peroxide, and vulcanizate thereof |
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