JPH08302078A - Low-modulus rubber composition - Google Patents
Low-modulus rubber compositionInfo
- Publication number
- JPH08302078A JPH08302078A JP10881495A JP10881495A JPH08302078A JP H08302078 A JPH08302078 A JP H08302078A JP 10881495 A JP10881495 A JP 10881495A JP 10881495 A JP10881495 A JP 10881495A JP H08302078 A JPH08302078 A JP H08302078A
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、低弾性率ゴム組成物に
関し、さらに詳しくは、ＯＡ用給紙ロール、免震ゴム、
防振ゴム、帆布、フィルムコーテイグ等様々な分野で使
用できる低硬度、かつ高強度なゴム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low elastic modulus rubber composition, more specifically, an OA paper feed roll, a seismic isolation rubber,
The present invention relates to a rubber composition having low hardness and high strength, which can be used in various fields such as anti-vibration rubber, canvas and film coating.
【０００２】[0002]
【従来の技術】従来、低弾性率ゴム組成物を製造するた
めに、ゴム材料に油、可塑剤等液状成分を多量に配合す
ることはよく知られている。しかしながら、ゴム材料に
前記液状成分を均一に配合する混練工程において、液状
成分が混練機のロータおよびチャンバと、ゴム材料との
界面に入ることによりスリップが生じ、結果として混練
時間が長くなる。このためスリップを防止する目的で、
シリカ、タルク、石灰、炭酸カルシウム等の粉状無機充
填剤（粉体）を多量に添加する方法が提案されていた。
この方法の欠点は、粉体を多量に混ぜると硬度が上昇
し、ゴム組成物を低硬度に保つのに、余分の液状成分を
さらに添加する必要が生じることである。特に、硬度を
ＪＩＳ−Ａ５０°以下に調整したゴム組成物を効率よく
製造することは、この方法では困難である。2. Description of the Related Art It has been well known that a large amount of a liquid component such as oil or a plasticizer is mixed with a rubber material in order to produce a low elastic modulus rubber composition. However, in the kneading step of uniformly blending the liquid component with the rubber material, slippage occurs due to the liquid component entering the interface between the rotor and the chamber of the kneader and the rubber material, resulting in a long kneading time. Therefore, for the purpose of preventing slip,
A method of adding a large amount of powdery inorganic filler (powder) such as silica, talc, lime, calcium carbonate has been proposed.
The disadvantage of this method is that the hardness increases when a large amount of powder is mixed, and it is necessary to further add an extra liquid component to keep the rubber composition at a low hardness. In particular, it is difficult to efficiently produce a rubber composition whose hardness is adjusted to JIS-A 50 ° or less by this method.
【０００３】また、粉体はゴム材料中に均一に分散しに
くく、低弾性率のゴム組成物では特にスリップによって
混練時に粉体を分散させる剪断力がかかりにくく、結果
としてゴム組成物の力学的強度は低下するという欠点も
ある。Further, the powder is difficult to disperse uniformly in the rubber material, and in the case of a rubber composition having a low elastic modulus, a shearing force which disperses the powder at the time of kneading is less likely to be applied particularly by slip, and as a result, the mechanical strength of the rubber composition is reduced. There is also a drawback that the strength is reduced.
【０００４】一方、建築物などの構造物用の防震、免震
装置として、積層免震構造体が急速に普及しつつある。
このような構造体を、構造物と基礎との間に挿入すると
地震の振動エネルギを吸収し、構造物へのエネルギの伝
達を小さくする働きを有する。こうした積層免震構造体
には、種々の構造のものが提案されているが、基本的に
は硬質板と高減衰性のゴム層とを交互に貼合わせた構造
を有している。１０万棟を越す家屋を損壊させた阪神大
震災の激しい揺れは、５００〜８００ガルの強い横揺れ
と、縦揺れとしては異例の大きさ（３００ガル以上）の
揺れとが重なって構造物に破壊的な力をもたらしたこと
が確かめられている。したがって、今後、高減衰特性を
有するゴム組成物の需要がますます高まってくることが
予想される。現在の所、高減衰性を発現させるために、
ゴム材料にカーボンブラックや、その他適当な充填剤を
多量に配合する方法が用いられている。こうすると、加
硫後に確かに高ヒステリシスロスにはなるが、他の重要
な特性である伸び率が低下するという大きな欠点があ
る。On the other hand, laminated seismic isolation structures are rapidly spreading as seismic isolation and seismic isolation devices for structures such as buildings.
When such a structure is inserted between the structure and the foundation, it has a function of absorbing the vibration energy of an earthquake and reducing the transmission of energy to the structure. Various laminated seismic isolation structures have been proposed, but basically they have a structure in which hard plates and highly dampening rubber layers are alternately laminated. The severe shaking of the Great Hanshin Earthquake that destroyed more than 100,000 houses was destroyed by the strong rolling of 500-800 gal and the unusual shaking of vertical pitch (300 gal or more). It has been confirmed that this has brought about the desired power. Therefore, it is expected that demand for rubber compositions having high damping properties will increase more and more in the future. At present, in order to develop high damping properties,
A method in which a large amount of carbon black or other suitable filler is blended with a rubber material is used. This will certainly result in a high hysteresis loss after vulcanization, but has the major drawback that the elongation, which is another important characteristic, will decrease.
【０００５】低弾性率、高強度のゴム組成物は、一般に
高減衰性を示し、積層免震構造体用ゴム組成物として適
当である。したがって、粉体を多量に含まない低弾性率
ゴム組成物を得ることは、同時にカーボンブラックやそ
の他充填剤を多量に含まない高減衰性ゴム組成物を得る
ことでもある。A rubber composition having a low elastic modulus and a high strength generally exhibits a high damping property and is suitable as a rubber composition for a laminated seismic isolation structure. Therefore, obtaining a low elastic modulus rubber composition which does not contain a large amount of powder also means obtaining a high damping rubber composition which does not contain a large amount of carbon black or other fillers.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記の要求
を満たす、低弾性率、高強度のゴム組成物であって、粉
体およびカーボンブラック等の充填剤の使用を極力抑え
たゴム組成物を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention is a rubber composition satisfying the above-mentioned requirements and having a low elastic modulus and a high strength, in which the use of a filler such as powder or carbon black is suppressed as much as possible. The purpose is to provide things.
【０００７】[0007]
【課題を解決するための手段】本発明は、基材ゴムと、
基材ゴム１００重量部に対し、液状成分１０〜２００重
量部と、アクリル系高吸油樹脂０．１〜５０重量部とを
含有して成ることを特徴とする低弾性率ゴム組成物を提
供する。本発明のゴム組成物において、好ましくは、ア
クリル系高吸油樹脂が炭素数１０〜１６の１価脂肪族ア
ルコールの（メタ）アクリレートを主成分として成る分
子中に、１個の重合性不飽和基を有する単量体（Ａ）９
０〜９９．９９９重量％および分子中に少なくとも２個
の重合性不飽和基を有する架橋性単量体（Ｂ）０．００
１〜１０重量％（ただし、単量体（Ａ）および（Ｂ）の
合計は、１００重量％である。）から成る単量体成分を
重合して得られる架橋重合体であることを特徴とする。
さらに好ましくは、前記アクリル系高吸油樹脂で、単量
体（Ａ）が、炭素数１０〜１６の１価脂肪族アルコール
の（メタ）アクリレートを単量体（Ａ）中に、５０重量
％以上含有して成るものであることを特徴とする。また
好ましくは、アクリル系高吸油樹脂が粉末状であり、そ
の平均粒径が１〜５００μｍの範囲にあることを特徴と
する。加えて好ましくは、本発明のゴム組成物の硬度
が、ＪＩＳ−Ａ５０°以下であることを特徴とする。The present invention comprises a base rubber,
A low elastic modulus rubber composition comprising 10 to 200 parts by weight of a liquid component and 0.1 to 50 parts by weight of an acrylic highly oil-absorbing resin with respect to 100 parts by weight of a base rubber. . In the rubber composition of the present invention, it is preferable that the acrylic high oil-absorbing resin has one polymerizable unsaturated group in a molecule composed mainly of a (meth) acrylate of a monohydric aliphatic alcohol having 10 to 16 carbon atoms. Monomer (A) 9 having
0 to 99.999% by weight and 0.000 of a crosslinkable monomer (B) having at least two polymerizable unsaturated groups in the molecule
It is a cross-linked polymer obtained by polymerizing a monomer component composed of 1 to 10% by weight (however, the total of the monomers (A) and (B) is 100% by weight). To do.
More preferably, in the acrylic high oil-absorbing resin, the monomer (A) is a (meth) acrylate of a monohydric aliphatic alcohol having 10 to 16 carbon atoms in the monomer (A) in an amount of 50% by weight or more. It is characterized by being contained. Further, preferably, the acrylic oil-absorbing resin is in the form of powder, and the average particle size thereof is in the range of 1 to 500 μm. In addition, preferably, the hardness of the rubber composition of the present invention is JIS-A 50 ° or less.
【０００８】[0008]
【作用】本発明者等は、基材ゴムに油等の液状成分を配
合して成るゴム組成物にアクリル系高吸油樹脂を所定量
添加すると、高吸油樹脂が液状成分を吸収し、膨潤し、
その状態で混練されることによってゴム組成に望ましい
物性を付与し、低弾性率、高強度ゴム組成物が得られる
ことを見いだし、本発明を完成した。The present inventors have found that when a predetermined amount of an acrylic high oil-absorbing resin is added to a rubber composition prepared by mixing a base rubber with a liquid component such as oil, the high oil-absorbing resin absorbs the liquid component and swells. ,
It was found that the kneading in that state gives the rubber composition desirable physical properties, and a low elastic modulus and high strength rubber composition is obtained, and the present invention has been completed.
【０００９】以下に、本発明をさらに詳しく説明する。The present invention will be described in more detail below.
【００１０】本発明に用いることができる基材ゴムとし
ては、天然ゴムおよび合成ゴム等が挙げられ、１種また
は２種以上それらを使用してよい。合成ゴムとしては、
ポリイソプレンゴム等が好ましいが、他のゴム（エチレ
ン−プロピレンゴム、ブタジエンゴム、スチレン・ブタ
ジエンゴム等）を全ゴム中、２０重量程度加えたものも
使用できる。The base rubber which can be used in the present invention includes natural rubber and synthetic rubber, and one or more kinds thereof may be used. As synthetic rubber,
Polyisoprene rubber and the like are preferred, but other rubbers (ethylene-propylene rubber, butadiene rubber, styrene-butadiene rubber, etc.) added to the total rubber in an amount of about 20% by weight can be used.
【００１１】本発明のゴム組成物に添加するアクリル系
高吸油性樹脂は、それ自体公知である。たとえば、特開
平３−２２１５８２には、このような樹脂を用いて、洋
上に流出した油を回収する方法が開示されている。しか
しながら、アクリル系高吸油性樹脂をゴム組成物に配合
する知見は、現在までなかった。特に、好適なアクリル
系高吸油性樹脂としては、前記のように、炭素数１０〜
１６の１価脂肪族アルコールの（メタ）アクリレートを
主成分として成る分子中に、１個の重合性不飽和基を有
する単量体（Ａ）９０〜９９．９９９重量％および分子
中に少なくとも２個の重合性不飽和基を有する架橋性単
量体（Ｂ）０．００１〜１０重量％（ただし、単量体
（Ａ）および（Ｂ）の合計は、１００重量％である。）
から成る単量体成分を重合して得られる架橋重合体が挙
げられる。さらに好適には、上記の樹脂中、前記単量体
（Ａ）が、炭素数１０〜１６の１価脂肪族アルコールの
（メタ）アクリレートを単量体（Ａ）中に、５０重量％
以上含有して成るものである。The acrylic oil-absorbing resin added to the rubber composition of the present invention is known per se. For example, Japanese Patent Laid-Open No. 3-221582 discloses a method of recovering oil spilled offshore using such a resin. However, there has been no knowledge to date of blending an acrylic highly oil-absorbent resin into a rubber composition. In particular, a suitable acrylic oil-absorbing resin has 10 to 10 carbon atoms as described above.
90 to 99.999% by weight of a monomer (A) having one polymerizable unsaturated group in a molecule composed mainly of (meth) acrylate of 16 monohydric aliphatic alcohols and at least 2 in the molecule. 0.001 to 10% by weight of the crosslinkable monomer (B) having one polymerizable unsaturated group (however, the total amount of the monomers (A) and (B) is 100% by weight).
A cross-linked polymer obtained by polymerizing a monomer component consisting of More preferably, in the above resin, the monomer (A) is 50 wt% of a (meth) acrylate of a monohydric aliphatic alcohol having 10 to 16 carbon atoms in the monomer (A).
It contains the above.
【００１２】これら高吸油性樹脂は、親油基を樹脂内に
有し、吸油（吸収）倍率は樹脂単位重量に対して最大で
約２５倍の吸油性を有する。本発明において、吸油した
アクリル系高吸油性樹脂は膨潤し、ゴム組成物製造過程
での混練工程において混練機により剪断される。高吸油
性樹脂は、好ましくは微細（粒径１〜５００μｍ）な粒
状の形態でゴム組成物中に添加使用する。These highly oil-absorbent resins have a lipophilic group in the resin and have an oil absorption (absorption) ratio of up to about 25 times the resin unit weight. In the present invention, the oil-absorbed acrylic highly oil-absorbent resin swells and is sheared by the kneader in the kneading step in the rubber composition manufacturing process. The highly oil-absorbent resin is preferably added to the rubber composition in the form of fine particles (particle size 1 to 500 μm).
【００１３】前記高吸油性樹脂によって吸収される油と
しては、脂肪族炭化水素系、芳香族炭化水素系、アルコ
ール系、エーテル系、エステル系、ケトン系、長鎖脂肪
酸系、長鎖アミン系、鉱物油、動物油等が列挙される
が、それらに加えて塩素系溶剤、各種有機溶剤、各種香
料等の吸収も可能である。したがって、本発明のゴム組
成物に添加可能な油も、これら列挙された油類の１種ま
た２種以上である。The oil absorbed by the highly oil-absorbent resin includes aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, ethers, esters, ketones, long chain fatty acids, long chain amines, Mineral oil, animal oil and the like are listed, but in addition to them, chlorine-based solvents, various organic solvents, various flavors and the like can be absorbed. Therefore, the oil that can be added to the rubber composition of the present invention is one or more of these listed oils.
【００１４】なお、本明細書中用いる「液状成分」なる
用語は、主に前記の列挙した油を指すが、その他以下に
記載する付加成分のうち液状のものをも含む。本発明の
ゴム組成物は、基材ゴム１００重量部に対してこのよう
な液状成分約１０〜約２００重量部を含有して成る。The term "liquid component" used in the present specification mainly refers to the oils listed above, but also includes the liquid components among the additional components described below. The rubber composition of the present invention comprises about 10 to about 200 parts by weight of such a liquid component per 100 parts by weight of the base rubber.
【００１５】本発明のゴム組成物において、高吸油性樹
脂の使用量は、ゴム基材１００重量部に対して約０．１
〜約５０重量部が望ましい。使用量が約０．１重量部未
満であると、吸油性が不足する。約５０重量部を超える
と混練中にゴムと油で膨潤した樹脂との海島構造が逆転
し、樹脂が海となることによりゴムの均一分散ができな
くなり破壊特性が著しく低下してしまう。したがって、
使用量が約５０重量部を超えると不都合である。In the rubber composition of the present invention, the amount of highly oil-absorbent resin used is about 0.1 per 100 parts by weight of the rubber base material.
~ About 50 parts by weight is desirable. If the amount used is less than about 0.1 parts by weight, the oil absorption will be insufficient. If the amount exceeds about 50 parts by weight, the sea-island structure of the rubber and the resin swollen with oil is reversed during kneading, and the resin becomes sea, so that the rubber cannot be uniformly dispersed and the fracture characteristics are significantly deteriorated. Therefore,
It is inconvenient if the amount used exceeds about 50 parts by weight.
【００１６】また本発明を実施するに際して、好ましく
は、油等液状成分を高吸油性樹脂に予め吸収させてから
ゴム基材に添加、分散する。その理由は油の粘度が高い
と樹脂の吸油速度が遅く、混練時に同時投入すると樹脂
が充分油を吸えず、加工時間が長くなる場合があるから
である。油の粘度にかかわらず高吸油性樹脂の添加効果
を出すためには予め樹脂に液状成分を吸収させておくこ
とが望ましい。In carrying out the present invention, preferably, a liquid component such as oil is previously absorbed in the highly oil-absorbing resin, and then added and dispersed in the rubber base material. The reason for this is that if the viscosity of the oil is high, the oil absorption rate of the resin is slow, and if added simultaneously during kneading, the resin may not sufficiently absorb the oil and the processing time may become long. In order to obtain the effect of adding the highly oil-absorbent resin regardless of the viscosity of the oil, it is desirable that the resin absorbs the liquid component in advance.
【００１７】本発明のゴム組成物には、油および高吸油
性樹脂の他に、必要に応じて可塑剤、加硫剤（硫黄、パ
ーオキサイド等）、加硫促進剤、加硫促進助剤、老化防
止剤、酸化防止剤、紫外線吸収剤、オゾン劣化防止剤、
軟化剤、粘着付与剤、無機充填剤（前述の粉体を含む）
等を任意に選択し、所定量を添加することができる。In the rubber composition of the present invention, in addition to the oil and the highly oil-absorbing resin, if necessary, a plasticizer, a vulcanizing agent (sulfur, peroxide, etc.), a vulcanization accelerator, a vulcanization acceleration auxiliary agent. , Anti-aging agent, antioxidant, ultraviolet absorber, anti-ozonant,
Softeners, tackifiers, inorganic fillers (including the above powders)
Etc. can be arbitrarily selected and a predetermined amount can be added.
【００１８】本発明のゴム組成物は、前記各成分を所定
量添加混練した後、約１５０℃で加硫成形して使用に供
する。The rubber composition of the present invention is used by vulcanizing and molding at about 150 ° C. after adding and kneading the above-mentioned components in predetermined amounts.
【００１９】本発明のゴム組成物が低弾性率、かつ高強
度であり、望ましい物性を示す理由は次のとおりであ
る。前記高吸油性樹脂は、液状成分を吸収後、膨潤する
が、このものは強度が小さく、ゴム混練時の剪断力で容
易に分散するので、練り上がったゴムの強度を低下させ
るような好ましくない異物とならず、ゴム強度をそのま
ま保持することができる。さらに、分散した高吸油性樹
脂から油等液状成分が除放され、ゴム組成物中に均一に
拡がるので物性上のムラもなくなる。一方、液状成分を
吸収した高吸油性樹脂は非常に柔らかく、ゴムの弾性率
を引上げる前述の粉体とは異なり、製品ゴムの弾性率は
高吸油性樹脂を配合しないゴムと同程度で、弾性率を所
望の値にするために、必要量以上の油を添加する必要が
ない。さらに、混練工程中ロータやチャンバとゴムの隙
間に液体が介在せず、混練時のスリップはなくなり、加
工時間が飛躍的に短縮できる。The reason why the rubber composition of the present invention has a low elastic modulus and high strength and exhibits desirable physical properties is as follows. The highly oil-absorbent resin swells after absorbing a liquid component, but it has a low strength and is easily dispersed by the shearing force at the time of kneading the rubber, which is not preferable because it lowers the strength of the kneaded rubber. It does not become a foreign substance and can maintain the rubber strength as it is. Furthermore, since the liquid component such as oil is released from the dispersed highly oil-absorbent resin and spreads uniformly in the rubber composition, the unevenness in physical properties is eliminated. On the other hand, the highly oil-absorbent resin that absorbs the liquid component is very soft, and unlike the above-mentioned powder that raises the elastic modulus of the rubber, the elastic modulus of the product rubber is similar to that of the rubber that does not contain the highly oil-absorbent resin, It is not necessary to add more oil than necessary to achieve the desired modulus. Further, during the kneading process, liquid does not exist in the gap between the rotor and the chamber and the rubber, slip during kneading is eliminated, and the processing time can be dramatically reduced.
【００２０】本発明のゴム組成物は、下記の方法で物性
を測定すると、硬度、引張り強さ（ｋｇｆ／ｃｍ2）、
および加工性でいずれも望ましい特性値を示す。したが
って、本発明のゴム組成物は、免震、防振ゴムとしてだ
けでなく、その他多岐の用途に適用可能である。The physical properties of the rubber composition of the present invention are measured by the following methods, and hardness, tensile strength (kgf / cm 2 ),
Both of the above and the workability show desirable characteristic values. Therefore, the rubber composition of the present invention is applicable not only to seismic isolation and anti-vibration rubber, but also to various other purposes.
【００２１】[0021]
【実施例】以下の例は、実施例および比較例により本発
明を説明するものであるが、これらは本発明の範囲を限
定するものではない。全ての部は、特に示す以外重量基
準である。The following examples illustrate the invention by way of examples and comparative examples, which do not limit the scope of the invention. All parts are by weight except where otherwise indicated.
【００２２】実施例１ アクリル系高吸油性樹脂として、オレオソーブＰＷ−１
７０（日本触媒化学工業株式会社製、平均粒径３０μ
ｍ）を用いた。この樹脂０．１部にナフテン系プロセス
オイル１０部を吸収させ、基材ゴム（ＳＭＲＣＶ−６
０）１００部に添加した。他のゴム配合成分は、ステア
リン酸１部、酸化亜鉛５部、老化防止剤１（Ｎ−フェニ
ル−Ｎ−イソプロピル−ｐ−フェニレンジアミン）１
部、老化防止剤２（ポリマ化２，２，４−トリメチル−
１，２−ジヒドロキノリン）１部、パラフィン２部、カ
ーボンブラック（ＦＥＦカーボン）１０部、加硫促進剤
（Ｎ−シクロヘキシル−２−ベンゾチアジル−スルフェ
ンアミド）２部、および硫黄１．５部であった。これら
を混練し、調製した組成物を１５０℃で３５分プレス加
硫して加硫ゴムを得た。Example 1 Oleosorb PW-1 was used as an acrylic high oil absorbing resin.
70 (manufactured by Nippon Shokubai Chemical Industry Co., Ltd., average particle size 30 μ
m) was used. 0.1 part of this resin was made to absorb 10 parts of naphthenic process oil, and the base rubber (SMRCV-6
0) Added to 100 parts. Other rubber compounding ingredients are 1 part of stearic acid, 5 parts of zinc oxide, 1 anti-aging agent (N-phenyl-N-isopropyl-p-phenylenediamine) 1
Parts, anti-aging agent 2 (polymerized 2,2,4-trimethyl-
1,2-dihydroquinoline) 1 part, paraffin 2 parts, carbon black (FEF carbon) 10 parts, vulcanization accelerator (N-cyclohexyl-2-benzothiazyl-sulfenamide) 2 parts, and sulfur 1.5 parts. there were. These were kneaded, and the prepared composition was press-vulcanized at 150 ° C. for 35 minutes to obtain a vulcanized rubber.
【００２３】実施例２〜７ 実施例１のゴム組成物製造方法において、ナフテン系プ
ロセスオイルと高吸油性樹脂の配合量を表１に示すよう
に変化させ、本発明のゴム組成物を調製した。さらに、
各組成物を実施例１と同様にプレス加硫して加硫ゴムを
得た。Examples 2 to 7 In the method for producing the rubber composition of Example 1, the rubber composition of the present invention was prepared by changing the compounding amounts of the naphthene-based process oil and the highly oil-absorbent resin as shown in Table 1. . further,
Each composition was press-vulcanized in the same manner as in Example 1 to obtain a vulcanized rubber.
【００２４】実施例８ アクリル系高吸油性樹脂オレオソーブＰＷ−１７０（平
均粒径３０μｍ）３部にパラフィン系プロセスオイル１
５部を吸収させ、基材ゴム（ＪＳＲＥＰ５７Ｃ）１００
部に添加した。他の配合成分は、ステアリン酸２部、酸
化亜鉛５部、カーボンブラック（ＭＴカーボン）５部、
ヒタノール１５０１ ２部、ジエチレングリコール１．
５部、加硫促進剤１（メルカプトベンゾチアゾール）１
部、加硫促進剤２（テトラメチルチウラムジスルフィ
ド）１部、加硫促進剤３（ジペンタメチレン−チウラム
テトラスルフィド）１部、および硫黄２部であった。こ
れらを混練し、調製した組成物を１５０℃で３５分間プ
レス加硫して加硫ゴムを得た。Example 8 Acrylic oil-absorbent resin Oleosorb PW-170 (average particle size 30 μm) 3 parts paraffin-based process oil 1
Absorb 5 parts and base rubber (JSREP57C) 100
Parts. Other components include 2 parts of stearic acid, 5 parts of zinc oxide, 5 parts of carbon black (MT carbon),
Hitanol 1501 2 parts, diethylene glycol 1.
5 parts, vulcanization accelerator 1 (mercaptobenzothiazole) 1
Parts, vulcanization accelerator 2 (tetramethylthiuram disulfide) 1 part, vulcanization accelerator 3 (dipentamethylene-thiuram tetrasulfide) 1 part, and sulfur 2 parts. These were kneaded, and the prepared composition was press-vulcanized at 150 ° C. for 35 minutes to obtain a vulcanized rubber.
【００２５】実施例９〜１０ 実施例８のゴム組成物製造方法において、パラフィン系
プロセスオイルと、高吸油性樹脂の配合量を表１に示す
ように変化させ、本発明のゴム組成物を調製した。さら
に、各組成物を実施例８と同様にプレス加硫して加硫ゴ
ムを得た。Examples 9 to 10 In the rubber composition manufacturing method of Example 8, the compounding amounts of the paraffinic process oil and the highly oil-absorbent resin were changed as shown in Table 1 to prepare the rubber composition of the present invention. did. Further, each composition was press-vulcanized in the same manner as in Example 8 to obtain a vulcanized rubber.
【００２６】実施例１１〜１３ 実施例８のゴム組成物製造方法において、表１に示すよ
うにシリカ（リップシルＶＮ３）を変量配合し、さらに
パラフィン系プロセスオイルと高吸油性樹脂の配合量を
表１に示すように変化させ、本発明のゴム組成物を調製
した。さらに、各組成物を実施例８と同様にプレス加硫
して加硫ゴムを得た。Examples 11 to 13 In the rubber composition manufacturing method of Example 8, silica (Lipsil VN3) was blended in a variable amount as shown in Table 1, and the blending amounts of the paraffinic process oil and the highly oil-absorbent resin were shown. The rubber composition of the present invention was prepared by changing as shown in 1. Further, each composition was press-vulcanized in the same manner as in Example 8 to obtain a vulcanized rubber.
【００２７】比較例１〜４ 実施例１のゴム組成物製造方法において、高吸油性樹脂
を添加せず、ナフテン系プロセスオイルの配合量を表１
に示すように変化させ、比較ゴム組成物を調製した。こ
れらの組成物を実施例１と同様にプレス加硫して、加硫
ゴムを得た。Comparative Examples 1 to 4 In the method for producing a rubber composition of Example 1, the amount of the naphthene-based process oil is shown in Table 1 without adding the highly oil-absorbing resin.
Comparative rubber compositions were prepared by changing as shown in. These compositions were press-vulcanized in the same manner as in Example 1 to obtain vulcanized rubber.
【００２８】比較例５〜６ 実施例８のゴム組成物製造方法において、高吸油性樹脂
を添加せず、ナフテン系プロセスオイルの配合量を表１
に示すように変化させ、比較ゴム組成物を調製した。こ
れらの組成物を実施例８と同様にプレス加硫して、加硫
ゴムを得た。Comparative Examples 5 to 6 In the rubber composition manufacturing method of Example 8, the blending amount of the naphthene-based process oil was calculated without adding the highly oil-absorbing resin.
Comparative rubber compositions were prepared by changing as shown in. These compositions were press-vulcanized in the same manner as in Example 8 to obtain vulcanized rubber.
【００２９】比較例７〜９ 実施例１１〜１３のゴム組成物製造方法において、高吸
油性樹脂を添加せず、パラフィン系プロセスオイルの配
合量およびシリカの配合量を表２に示すように変化さ
せ、比較ゴム組成物を調製した。これらの組成物を１５
０℃で３５分間プレス加硫して、加硫ゴムを製造した。Comparative Examples 7 to 9 In the rubber composition manufacturing method of Examples 11 to 13, the compounding amounts of paraffinic process oil and silica were changed as shown in Table 2 without adding a highly oil-absorbing resin. Then, a comparative rubber composition was prepared. 15 of these compositions
Vulcanized rubber was produced by press vulcanization at 0 ° C. for 35 minutes.
【００３０】物性試験 前記実施例、比較例のゴム組成物から製造された加硫ゴ
ムの諸物性値を以下のようにして測定した。 Physical Properties Test Various physical properties of the vulcanized rubbers produced from the rubber compositions of the above Examples and Comparative Examples were measured as follows.
【００３１】硬度 硬度の測定は、ＪＩＳ−Ｋ−６３０１に従って、ＪＩＳ
−Ａ硬度計を使用して行った。 Hardness The hardness is measured according to JIS-K-6301.
-A hardness meter was used.
【００３２】引張り強度（ｋｇｆ／ｃｍ 2） 引張り強度の測定は、ＪＩＳ−Ｋ−６３０１に従って、
ＪＩＳ−３ダンベルを使用して行った。 Tensile Strength (kgf / cm 2 ) The tensile strength is measured according to JIS-K-6301.
It was carried out using a JIS-3 dumbbell.
【００３３】加工性 ＢＲ型バンバリ（１．５ｌ）に基材ゴムを投入して、３
０秒予備混練し、その後他の配合成分を加え、５分間練
ってバンバリから取出したときの練り上がり状態より判
断した。[0033] The base rubber was put in processability BR type Banbury (1.5 l), 3
Pre-kneading was carried out for 0 seconds, other compounding ingredients were added thereafter, and kneading was carried out for 5 minutes.
【００３４】これら物性試験の結果を表２に示す。The results of these physical property tests are shown in Table 2.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【表２】 [Table 2]
【００３７】さらに、実施例３のゴム組成物と比較例２
のゴム組成物の製造過程において、必要な混練時間を比
較したところ、前者の場合７分間であるのに対し、後者
の場合、２５分間要した。Further, the rubber composition of Example 3 and Comparative Example 2
When the necessary kneading time was compared in the production process of the rubber composition, the former was 7 minutes, while the latter was 25 minutes.
【００３８】物性値データから明らかなように、本発明
のゴム組成物は、比較例のゴム組成物に比べて加工性に
おいて優れ、生成した加硫ゴムの硬度も設定値以下でさ
らに力学的強度（引張り強度）が大きく良好である。ま
た、本発明によると、比較例の製法と比べて、ゴム組成
物の加工限界を下げることも可能である。As is clear from the physical property data, the rubber composition of the present invention is superior in processability as compared with the rubber composition of the comparative example, and the hardness of the vulcanized rubber produced is below the set value, and the mechanical strength is further increased. (Tensile strength) is large and good. Further, according to the present invention, it is possible to lower the processing limit of the rubber composition as compared with the production method of the comparative example.
【００３９】[0039]
【発明の効果】以上のように本発明によれば、特定のア
クリル系高吸油性樹脂を油等の液状成分を吸収する目的
でゴム組成物に配合したことにより、形成する加硫ゴム
の弾性率を設定値以下に保ち得、力学的強度も良好であ
り、その他望ましい特性を与えることが見いだされた。
さらに加えて、本発明のゴム組成物は、混練時間も短く
て済み、生産性が優れている。したがって、本発明のゴ
ム組成物は、前記の数々の用途に使用することができ、
工業上極めて利用価値がある。As described above, according to the present invention, the elasticity of a vulcanized rubber formed by adding a specific acrylic highly oil-absorbent resin to a rubber composition for the purpose of absorbing a liquid component such as oil It has been found that the rate can be kept below a set value, the mechanical strength is good, and other desirable properties are given.
In addition, the rubber composition of the present invention has a short kneading time and is excellent in productivity. Therefore, the rubber composition of the present invention can be used in the various applications described above,
It is extremely useful in industry.
Claims (5)
し、液状成分１０〜２００重量部と、アクリル系高吸油
樹脂０．１〜５０重量部とを含有して成ることを特徴と
する低弾性率ゴム組成物。1. A base rubber, and 10 to 200 parts by weight of a liquid component and 0.1 to 50 parts by weight of an acrylic high oil absorbing resin, based on 100 parts by weight of the base rubber. A low elastic modulus rubber composition.
６の１価脂肪族アルコールの（メタ）アクリレートを主
成分として成る分子中に、１個の重合性不飽和基を有す
る単量体（Ａ）９０〜９９．９９９重量％および分子中
に少なくとも２個の重合性不飽和基を有する架橋性単量
体（Ｂ）０．００１〜１０重量％（ただし、単量体
（Ａ）および（Ｂ）の合計は、１００重量％である。）
から成る単量体成分を重合して得られる架橋重合体であ
る請求項１記載の低弾性率ゴム組成物。2. The acrylic high oil absorbing resin has 10 to 1 carbon atoms.
90 to 99.999% by weight of a monomer (A) having one polymerizable unsaturated group in a molecule composed mainly of (meth) acrylate of a monohydric aliphatic alcohol of 6 and at least 2 in a molecule. 0.001 to 10% by weight of the crosslinkable monomer (B) having one polymerizable unsaturated group (however, the total amount of the monomers (A) and (B) is 100% by weight).
The low elastic modulus rubber composition according to claim 1, which is a cross-linked polymer obtained by polymerizing a monomer component consisting of:
価脂肪族アルコールの（メタ）アクリレートを単量体
（Ａ）中に、５０重量％以上含有して成るものである請
求項２記載の低弾性率ゴム組成物。3. The monomer (A) is 1 having 10 to 16 carbon atoms.
The low elastic modulus rubber composition according to claim 2, wherein the (meth) acrylate of a hydric aliphatic alcohol is contained in the monomer (A) in an amount of 50% by weight or more.
その平均粒径が１〜５００μｍの範囲にある請求項１記
載の低弾性率ゴム組成物。4. The acrylic oil-absorbing resin is in powder form,
The low elastic modulus rubber composition according to claim 1, wherein the average particle size is in the range of 1 to 500 µm.
求項１記載の低弾性率ゴム組成物。5. The low elastic modulus rubber composition according to claim 1, which has a hardness of JIS-A 50 ° or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10881495A JPH08302078A (en) | 1995-05-02 | 1995-05-02 | Low-modulus rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10881495A JPH08302078A (en) | 1995-05-02 | 1995-05-02 | Low-modulus rubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08302078A true JPH08302078A (en) | 1996-11-19 |
Family
ID=14494186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10881495A Pending JPH08302078A (en) | 1995-05-02 | 1995-05-02 | Low-modulus rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08302078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013129816A (en) * | 2011-11-25 | 2013-07-04 | Sumitomo Chemical Co Ltd | Rubber composition |
-
1995
- 1995-05-02 JP JP10881495A patent/JPH08302078A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013129816A (en) * | 2011-11-25 | 2013-07-04 | Sumitomo Chemical Co Ltd | Rubber composition |
| JP2017082239A (en) * | 2011-11-25 | 2017-05-18 | 住友化学株式会社 | Method for producing rubber composition |
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