JP2006199892A - Rubber composition for conveyor belt, rubber for conveyor belt cover, and conveyor belt - Google Patents

Rubber composition for conveyor belt, rubber for conveyor belt cover, and conveyor belt Download PDF

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JP2006199892A
JP2006199892A JP2005015724A JP2005015724A JP2006199892A JP 2006199892 A JP2006199892 A JP 2006199892A JP 2005015724 A JP2005015724 A JP 2005015724A JP 2005015724 A JP2005015724 A JP 2005015724A JP 2006199892 A JP2006199892 A JP 2006199892A
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rubber
conveyor belt
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rubber composition
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JP4815132B2 (en
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Hironori Nakano
宏規 中野
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber composition for a conveyor belt, having abrasion resistance and cut resistance (impact resistance) compatible with each other, to provide a rubber for a conveyor belt cover given by using the same, and to provide the conveyor belt. <P>SOLUTION: This rubber composition for the conveyor belt contains 50-70 pts.wt. of (B) carbon black having a nitrogen adsorption specific surface area of ≥100 m<SP>2</SP>/g and 10-30 pts.wt. of (C) a resin based on 100 pts.wt. of (A) a rubber component which contains 90-60 pts.wt. of a styrene-butadiene rubber and 10-40 pts.wt. of a butadiene rubber and/or a natural rubber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、コンベアベルト用ゴム組成物、その組成物を用いたコンベアベルトカバー用ゴム及びコンベアベルトに関し、さらに詳しくは、上面カバーゴム、補強材及び下面カバーゴムからなるコンベアベルトの上面カバー用ゴムとして、特に耐摩耗性と耐カット性(耐衝撃性)を両立させたコンベアベルト用ゴム組成物、その組成物を用いたコンベアベルトカバー用ゴム及びコンベアベルトに関するものである。   The present invention relates to a rubber composition for a conveyor belt, a rubber for a conveyor belt cover using the composition, and a conveyor belt. More specifically, the rubber for a top cover of a conveyor belt comprising a top cover rubber, a reinforcing material, and a bottom cover rubber. In particular, the present invention relates to a rubber composition for a conveyor belt that achieves both wear resistance and cut resistance (impact resistance), a rubber for a conveyor belt cover using the composition, and a conveyor belt.

コンベアベルトは、物品を輸送する手段として極めて有用であり、多くの場所において使用されている。
このコンベアベルトは、通常、上面カバーゴム、補強材及び下面カバーゴムからなっているが、特に上面カバーゴムは搭載された被輸送物との摩擦によって摩耗し易く、また、衝撃を加えられた場合カットを受け易いので、ベルト全体の寿命を向上させるためには、耐摩耗性と耐カット性(耐衝撃性)の両立を図る必要がある。
Conveyor belts are extremely useful as a means of transporting articles and are used in many places.
This conveyor belt is usually made of top cover rubber, reinforcing material, and bottom cover rubber, but the top cover rubber is particularly prone to wear due to friction with the object to be transported, and when impact is applied. Since it is easily cut, it is necessary to achieve both wear resistance and cut resistance (impact resistance) in order to improve the life of the entire belt.

上記の性能のうち、耐カット性(耐衝撃性)を向上させるため、天然ゴムとスチレン−ブタジエンゴムとの混合比が50/50〜80/20であるゴム100質量部に対して、窒素吸着比表面積100m2/g以上、DBP吸油量100cm3/100g以上であるカーボンブラックを45〜65質量部、シリカを5〜20質量部および樹脂を2〜7質量部を含有するコンベアベルトカバー用ゴム組成物が開示されているが(特許文献1参照)、耐摩耗性の点では、未だ不十分であった。 Among the above performances, in order to improve cut resistance (impact resistance), nitrogen adsorption is performed on 100 parts by mass of rubber having a mixing ratio of natural rubber and styrene-butadiene rubber of 50/50 to 80/20. a specific surface area of 100 m 2 / g or more, a rubber conveyor belt cover containing 2 to 7 parts by weight 45 to 65 parts by weight of carbon black is DBP oil absorption 100 cm 3/100 g or more, the silica 5-20 parts by weight and the resin Although a composition is disclosed (see Patent Document 1), it is still insufficient in terms of wear resistance.

また、耐摩耗性を向上させるため、天然ゴムにネオジウム系触媒により重合したポリブタジエンゴムを含むコンベアベルトカバー用ゴム組成物が開示されているが(特許文献2参照)、耐カット性を向上するものではなかった。
したがって、耐摩耗性と耐カット性(耐衝撃性)の両立を達成するコンベアベルト用ゴム組成物、特にコンベアベルトカバー用ゴム組成物が望まれていた。
In addition, a rubber composition for a conveyor belt cover containing polybutadiene rubber polymerized with a neodymium-based catalyst on natural rubber in order to improve wear resistance is disclosed (see Patent Document 2), which improves cut resistance. It wasn't.
Therefore, a rubber composition for a conveyor belt that achieves both wear resistance and cut resistance (impact resistance), particularly a rubber composition for a conveyor belt cover, has been desired.

特開平2000−198517号公報Japanese Unexamined Patent Publication No. 2000-198517 特開平2003−105136号公報JP-A-2003-105136

本発明は、このような状況下で、耐摩耗性と耐カット性(耐衝撃性)の両立を達成するコンベアベルト用ゴム組成物、特にコンベアベルトカバー用ゴム組成物及びそれを用いたコンベアベルトカバー用ゴム及びコンベアベルトを提供することを目的とするものである。   The present invention provides a rubber composition for a conveyor belt that achieves both wear resistance and cut resistance (impact resistance) under such circumstances, in particular, a rubber composition for a conveyor belt cover and a conveyor belt using the same. The object is to provide a rubber for a cover and a conveyor belt.

本発明者らは、前記目的を達成するために鋭意研究を重ねた結果、スチレン−ブタジエンゴム主体とし、ブタジエンゴム及び/又は天然ゴムを含有してなるゴム成分に対し、特定量の特定のカーボンブラック及び特定量の樹脂を配合してなるゴム組成物をコンベアベルトカバーゴム及びコンベアベルトに用いることにより、その目的を達成し得ることを見出した。本発明は、かかる知見に基づいて完成したものである。
すなわち、本発明は、(A)スチレン−ブタジエンゴム90〜60質量部、並びにブタジエンゴム及び/又は天然ゴム10〜40質量部を含むゴム成分100質量部に対して、(B)窒素吸着比表面積100m2/g以上のカーボンブラックを50〜70質量部、及び(C)樹脂を10〜30質量部を含有してなるコンベアベルト用ゴム組成物であり、好ましくは、前記ポリブタジエンゴムがネオジウム系触媒により重合されたものである。
さらに、上記のコンベアベルト用ゴム組成物を用いることを特徴とするコンベアベルトカバー用ゴム及びコンベアベルトである。
As a result of intensive studies to achieve the above object, the present inventors have found that a specific amount of specific carbon is contained in a rubber component mainly composed of styrene-butadiene rubber and containing butadiene rubber and / or natural rubber. It has been found that the object can be achieved by using a rubber composition containing black and a specific amount of resin for a conveyor belt cover rubber and a conveyor belt. The present invention has been completed based on such findings.
That is, the present invention relates to (A) 90 to 60 parts by mass of styrene-butadiene rubber and 100 parts by mass of a rubber component containing 10 to 40 parts by mass of butadiene rubber and / or natural rubber. It is a rubber composition for conveyor belts comprising 50 to 70 parts by mass of carbon black of 100 m 2 / g or more, and 10 to 30 parts by mass of (C) resin. Preferably, the polybutadiene rubber is a neodymium catalyst. It is a thing polymerized by.
Furthermore, it is a rubber for conveyor belts and a conveyor belt characterized by using the rubber composition for conveyor belts described above.

本発明のコンベアベルト用ゴム組成物は、耐摩耗性と耐カット性(耐衝撃性)とのいずれにも優れ、それらの両立が達成されるので、耐久性を大幅に向上するコンベアベルトカバー用ゴム及びコンベアベルトを提供することができる。   The rubber composition for conveyor belts of the present invention is excellent in both wear resistance and cut resistance (impact resistance), and both of them are achieved, so that the durability of the conveyor belt cover can be greatly improved. Rubber and conveyor belts can be provided.

本発明で用いられるスチレン−ブタジエンゴム(以下、SBRという)としては、乳化重合SBR、溶液重合SBRのいずれを用いても良い。特にその組成は限定されないが、好ましくは、含有スチレン量が10〜35質量%、より好ましくは15〜30質量%、さらに好ましくは20〜30質量%である。この範囲であると、耐衝撃性、耐摩耗性のバランスが良好となり好ましい。また、SBRとしては、市販品を利用することができ、例えば、乳化重合SBRとしては、JSR1500、JSR1502、JSR1712(いずれもスチレン含量23.5質量%)(いずれも株式会社JSR製)等が、溶液重合SBRとしては、SL552(スチレン含量24質量%)、SL555(スチレン含量24質量%)、SL556(スチレン含量24質量%)、SL574(スチレン含量15質量%)、(いずれも株式会社JSR製)等が挙げられる。   As the styrene-butadiene rubber (hereinafter referred to as SBR) used in the present invention, either emulsion polymerization SBR or solution polymerization SBR may be used. Although the composition is not particularly limited, the content of styrene is preferably 10 to 35% by mass, more preferably 15 to 30% by mass, and still more preferably 20 to 30% by mass. Within this range, the balance between impact resistance and wear resistance is good, which is preferable. Moreover, as SBR, a commercial item can be utilized, for example, as emulsion polymerization SBR, JSR1500, JSR1502, JSR1712 (all are styrene content 23.5 mass%) (all are the JSR Corporation make), etc. As solution polymerization SBR, SL552 (styrene content 24% by mass), SL555 (styrene content 24% by mass), SL556 (styrene content 24% by mass), SL574 (styrene content 15% by mass) (all manufactured by JSR Corporation) Etc.

また、本発明におけるポリブタジエンゴム(以下、BRという)は、ニッケル系触媒により重合されるBR、例えば、BR01、BR11(いずれも株式会社JSR製)や、リチウム系触媒により重合されるBR、例えば、BR71(株式会社JSR製)であってもよいが、ネオジウム系触媒により重合されたポリブタジエンゴム(以下、Nd−BRという)であることが好ましい。ここで、BRの二重結合部分の構造にはシス体とトランス体があるが、本発明におけるNd−BRはシス体が80%以上であることが好ましく、さらには90%以上であることが好ましい。シス体が80%未満であると耐摩耗性に劣る場合があるからである。   In addition, the polybutadiene rubber (hereinafter referred to as BR) in the present invention is BR polymerized by a nickel-based catalyst, for example, BR01, BR11 (both manufactured by JSR Corporation), or BR polymerized by a lithium-based catalyst, for example, BR71 (manufactured by JSR Corporation) may be used, but polybutadiene rubber (hereinafter referred to as Nd-BR) polymerized with a neodymium catalyst is preferable. Here, the structure of the double bond portion of BR includes a cis isomer and a trans isomer. Nd-BR in the present invention preferably has a cis isomer of 80% or more, and more preferably 90% or more. preferable. This is because if the cis-form is less than 80%, the wear resistance may be inferior.

前記ネオジウム系触媒としては、種々のものがあるが、ネオジウムを含む化合物又はこれらとルイス塩基との反応物等を使用し得る。具体的には、ネオジウムのカルボン酸塩、リン酸塩、亜リン酸塩、アルコキシド等が好適である。
また、助触媒としてアルミノキサンを用いることが好ましく、特にメチルアルミノキサンが好適である。
There are various types of neodymium catalysts, and a compound containing neodymium or a reaction product of these with a Lewis base can be used. Specifically, neodymium carboxylate, phosphate, phosphite, alkoxide and the like are suitable.
Moreover, it is preferable to use aluminoxane as a co-catalyst, and methylaluminoxane is particularly preferable.

また、本発明におけるNd−BRは、末端変性がなされていることが好ましい。Nd−BRの末端変性方法としては、変性剤を使用してNd−BRの活性末端を変性する方法を用いることができる。変性剤としては、例えば、四塩化スズ及び四臭化スズ等のハロゲン化スズ、トリブチルスズクロライド等のハロゲン化有機スズ化合物、四塩化ケイ素及びクロロトリエチルシラン等のケイ素化合物、フェニルイソシアネート等のイソシアネート基含有化合物、アミド化合物、ラクタム化合物、尿素化合物並びにイソシアヌル酸誘導体等が挙げられる。この中で特にスズ系化合物を用いて末端変性をすることが好ましい。また、本発明で用いる末端変性Nd−BRは、分子量に関しては特に制限されない。   The Nd-BR in the present invention is preferably end-modified. As a terminal modification method of Nd-BR, a method of modifying the active terminal of Nd-BR using a denaturant can be used. Examples of the modifier include tin halides such as tin tetrachloride and tin tetrabromide, halogenated organotin compounds such as tributyltin chloride, silicon compounds such as silicon tetrachloride and chlorotriethylsilane, and isocyanate groups such as phenyl isocyanate. Examples thereof include compounds, amide compounds, lactam compounds, urea compounds, and isocyanuric acid derivatives. Of these, terminal modification is particularly preferred using a tin compound. Further, the terminal-modified Nd-BR used in the present invention is not particularly limited with respect to the molecular weight.

本発明におけるゴム成分は、SBR90〜60質量部、並びにBR及び/又は天然ゴム10〜40質量部を含む。SBR配合量が90質量部を超えると耐摩耗性が低下するため、また、60質量部未満であると耐カット性が低下するため本発明の目的を満足し得ないからである。   The rubber component in the present invention includes 90 to 60 parts by mass of SBR and 10 to 40 parts by mass of BR and / or natural rubber. This is because if the SBR content exceeds 90 parts by mass, the wear resistance decreases, and if it is less than 60 parts by mass, the cut resistance decreases and the object of the present invention cannot be satisfied.

本発明におけるゴム成分としては、上記のSBR、BR及び/又は天然ゴムの他に、本発明の目的に反しない範囲で、コンベアベルトという用途に応じて、少量(例えば、10質量部以下)の種々の他の合成ゴムを含むことができる。他の合成ゴムとしては、イソプレンゴム、ブチルゴム、ハロゲン化ブチルゴムが好ましく、さらに臭素化ブチルゴム、パラメチルスチレン基を有するブチルゴム(具体的にはイソブチレンとp−ハロゲン化メチルスチレンとの共重合体等)、エチレン・プロピレン・ジエンゴム(EPDM)なども好適なものとして挙げることができる。また、本発明における天然ゴムの一部をイソプレンゴムに置換し得る。   As a rubber component in the present invention, in addition to the above-mentioned SBR, BR and / or natural rubber, a small amount (for example, 10 parts by mass or less) of the rubber component is used in a range not departing from the object of the present invention, depending on the use of a conveyor belt. A variety of other synthetic rubbers can be included. Other synthetic rubbers are preferably isoprene rubber, butyl rubber, and halogenated butyl rubber. Further, brominated butyl rubber and butyl rubber having a paramethylstyrene group (specifically, a copolymer of isobutylene and p-halogenated methylstyrene, etc.) Ethylene / propylene / diene rubber (EPDM) can also be mentioned as a preferable example. Further, a part of the natural rubber in the present invention can be replaced with isoprene rubber.

本発明におけるカーボンブラックとしては、ISAF級以上、即ち、窒素吸着比表面積100m2/g以上のカーボンブラックが用いられる。ISAF級のカーボンブラックとしては、ISAF(N220)、例えば、旭#80(窒素吸着比表面積115m2/g、DBP吸油量(A法)113ml/100g:旭カーボン社製)、ISAF−HS(N234)、例えば、シースト7HM(窒素吸着比表面積126m2/g、DBP吸油量(A法)125ml/100g:東海カーボン社製)が用いられる。これらのうち、高ストラクチャー、即ち、DBP吸油量(A法)120ml/100g以上の、ISAF級以上のカーボンブラックが好ましい。
カーボンブラックの窒素吸着比表面積およびDBP吸油量(A法)の上限を定めるものではないが、窒素吸着比表面積として、150m2/g以下、DBP吸油量(A法)150ml/100g以下が好ましい。
As the carbon black in the present invention, a carbon black having an ISAF grade or higher, that is, a nitrogen adsorption specific surface area of 100 m 2 / g or higher is used. As ISAF grade carbon black, ISAF (N220), for example, Asahi # 80 (nitrogen adsorption specific surface area 115 m 2 / g, DBP oil absorption (Method A) 113 ml / 100 g: manufactured by Asahi Carbon Co., Ltd.), ISAF-HS (N234) ), For example, a seast 7HM (nitrogen adsorption specific surface area 126 m 2 / g, DBP oil absorption (Method A) 125 ml / 100 g: manufactured by Tokai Carbon Co., Ltd.) Among these, carbon black having a high structure, that is, a DBP oil absorption (Method A) of 120 ml / 100 g or more and ISAF grade or more is preferable.
Although the upper limit of the nitrogen adsorption specific surface area and DBP oil absorption (Method A) of carbon black is not determined, the nitrogen adsorption specific surface area is preferably 150 m 2 / g or less and DBP oil absorption (Method A) 150 ml / 100 g or less.

カーボンブラックの配合量としては、50〜70質量部が賞用される。カーボンブラック配合量が70質量部を超えると加工性が低下するため、また、50質量部未満であると耐摩耗性及び耐カット性が低下するため本発明の目的を満足し得ないからである。   As the compounding amount of carbon black, 50 to 70 parts by mass are used. This is because if the amount of carbon black exceeds 70 parts by mass, the workability deteriorates, and if it is less than 50 parts by mass, the wear resistance and cut resistance deteriorate, so the object of the present invention cannot be satisfied. .

本発明における樹脂は、特に限定しないが、ロジン系樹脂、ジシクロペンタジエン樹脂、石油系炭化水素樹脂(脂肪族、芳香族共に用いられ得る)芳香族多価カルボン酸・脂肪族多価アルコール縮合物、クマロン樹脂の単体若しくはそのブレンドを用いる事が耐カット性、耐摩耗性及び工場作業性を考慮すると望ましい。   The resin in the present invention is not particularly limited, but rosin resin, dicyclopentadiene resin, petroleum hydrocarbon resin (can be used for both aliphatic and aromatic) aromatic polycarboxylic acid / aliphatic polyhydric alcohol condensate In view of cut resistance, wear resistance and factory workability, it is desirable to use a coumarone resin alone or a blend thereof.

樹脂は、10〜30質量部の配合量で用いられる。樹脂配合量が30質量部を超えると耐摩耗性が低下するため、また、10質量部未満であると耐カット性が低下するため本発明の目的を満足し得ないからである。   The resin is used in an amount of 10 to 30 parts by mass. This is because if the resin content exceeds 30 parts by mass, the wear resistance decreases, and if it is less than 10 parts by mass, the cut resistance decreases, so that the object of the present invention cannot be satisfied.

また、本発明のゴム組成物には、通常硫黄が含有される。この硫黄の含有量は、ゴム成分100重量部当たり、0.3〜5重量部の範囲が好ましい。この含有量が0.3重量部未満では十分な加硫効果が得られず、目標性能を達成できなくなる場合がある。また5重量部を超えると、ゴムがもろくなり、ゴムの疲労性能が低下するなど好ましくない場合がある。   Further, the rubber composition of the present invention usually contains sulfur. The sulfur content is preferably in the range of 0.3 to 5 parts by weight per 100 parts by weight of the rubber component. If this content is less than 0.3 parts by weight, a sufficient vulcanization effect cannot be obtained, and the target performance may not be achieved. On the other hand, if it exceeds 5 parts by weight, the rubber becomes brittle and the fatigue performance of the rubber may be unfavorable.

さらに、本発明のゴム組成物には、前記各成分以外に、ゴム業界で通常使用される配合剤を通常の配合量で適宜配合することができる。具体的には、シリカやクレー等の充填剤、アロマオイル等の軟化剤、ジフェニルグアニジン等のグアニジン類、メルカプトベンゾチアゾール等のチアゾール類、N,N'−ジシクロヘキシル−2−ベンゾチアゾリルスルフェンアミド等のスルフェンアミド類、テトラメチルチウラムジスルフィド等のチウラム類などの加硫促進剤、酸化亜鉛等の加硫促進助剤、ポリ(2,2,4−トリメチル−1,2−ジヒドロキノリン)、フェニル−α−ナフチルアミン等のアミン類などの老化防止剤等である。   Furthermore, in the rubber composition of the present invention, in addition to the above-mentioned components, compounding agents that are usually used in the rubber industry can be appropriately blended in a usual compounding amount. Specifically, fillers such as silica and clay, softeners such as aroma oil, guanidines such as diphenylguanidine, thiazoles such as mercaptobenzothiazole, N, N′-dicyclohexyl-2-benzothiazolylsulfenamide Sulfenamides such as, vulcanization accelerators such as thiurams such as tetramethylthiuram disulfide, vulcanization accelerators such as zinc oxide, poly (2,2,4-trimethyl-1,2-dihydroquinoline), Anti-aging agents such as amines such as phenyl-α-naphthylamine.

本発明のゴム組成物は、開放混合式の練りロール機や密閉式混合機のバンバリーミキサー等の混練機を用いて混練りすることにより得ることができる。そして、得られたゴム組成物をカレンダーや押出し機などでシート状に成形し、補強材である帆布又はスチールコードを芯材として、これを覆うようにシート状ゴム成形物を貼り合わせ、その後、加硫を行うことによりコンベアベルトを得ることができる。   The rubber composition of the present invention can be obtained by kneading using a kneader such as an open mixing kneading roll machine or a closed mixer Banbury mixer. Then, the obtained rubber composition is molded into a sheet shape with a calendar or an extruder, the reinforcing material is a canvas or steel cord as a core material, and a sheet-like rubber molded product is bonded so as to cover it, A conveyor belt can be obtained by vulcanization.

前記したように、コンベアベルトは、通常上面カバーゴム、補強材及び下面カバーゴムからなっており、被輸送物と接触するのは上面カバーゴムである。本発明のコンベアベルトは、上面カバーゴム、補強材及び下面カバーゴムからなるベルトの、上面カバーゴムに本発明のゴム組成物を使用したものである。補強材及び下面カバーゴムは、この種のベルト用として従来から知られていたものが使用し得るが、無論、下面カバーゴムに本発明のゴム組成物を使用しても、一向に差し支えない。本発明のコンベアベルトは、従来公知のコンベアベルトの何れにも使用可能である。すなわち、本発明のベルトを、従来公知のコンベアベルト用ベルトに代えて装着したコンベアベルトであり、かかるコンベアベルトをも本発明は提供するものである。   As described above, the conveyor belt is usually made of an upper surface cover rubber, a reinforcing material, and a lower surface cover rubber, and it is the upper surface cover rubber that comes into contact with an object to be transported. The conveyor belt of the present invention uses the rubber composition of the present invention for the upper cover rubber of a belt made of an upper cover rubber, a reinforcing material and a lower cover rubber. As the reinforcing material and the bottom cover rubber, those conventionally known for this type of belt can be used, but of course, even if the rubber composition of the present invention is used for the bottom cover rubber, there is no problem. The conveyor belt of the present invention can be used for any conventionally known conveyor belt. That is, the belt of the present invention is a conveyor belt mounted instead of a conventionally known belt for a conveyor belt, and the present invention also provides such a conveyor belt.

次に、本発明を実施例により、さらに詳細に説明するが、本発明は、これらの例によってなんら限定されるものではない。
ここで、評価法について下記する。
(落錘カット試験)縦60mm×横70mm×高さ30mmのゴムブロックを加硫し、サンプルを作成する。室温でサンプルの80cm高さから重量15kgの錘をつけた角度60度の鋭利な刃を落下させ、生じた亀裂深さ(mm)を測定した。亀裂深さが小さい程、耐カット性(耐衝撃性)が良好である。
(DIN摩耗)DIN摩耗試験機を用いて耐摩耗試験を行った。耐摩耗試験は室温で行い、摩耗量をmm3で表わした。摩耗量が少ない程、耐摩耗性が良好である。
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Here, the evaluation method will be described below.
(Falling weight cut test) A rubber block having a length of 60 mm, a width of 70 mm, and a height of 30 mm is vulcanized to prepare a sample. A sharp blade with an angle of 60 degrees with a weight of 15 kg was dropped from a height of 80 cm of the sample at room temperature, and the crack depth (mm) produced was measured. The smaller the crack depth, the better the cut resistance (impact resistance).
(DIN abrasion) A wear resistance test was performed using a DIN abrasion tester. The abrasion resistance test was performed at room temperature, and the amount of abrasion was expressed in mm 3 . The smaller the amount of wear, the better the wear resistance.

実施例1〜12、比較例1〜4
第1表に記載した配合処方により、16種類のゴム組成物を調製し、落錘カット試験及びDIN摩耗の評価を行った。その結果を第1表に示す。
Examples 1-12, Comparative Examples 1-4
Sixteen rubber compositions were prepared according to the formulation described in Table 1, and a drop weight cut test and DIN wear were evaluated. The results are shown in Table 1.

Figure 2006199892
Figure 2006199892

Figure 2006199892
Figure 2006199892

第1表の各組成物において用いられたポリマー等の銘柄等を下記する。
SBR: JSR1500(株式会社JSR製/スチレン含量23.5質量%)
BR(1): T0700(株式会社JSR製/ネオジウム触媒BR、助触媒:メチルアルミノキサン)
BR(2): BR01(株式会社JSR製)
ISAF: 旭#80(旭カーボン社製/窒素吸着比表面積115m2/g、DBP吸油量(A法)113ml/100g)
N234: シースト7HM(東海カーボン社製/窒素吸着比表面積126m2/g、DBP吸油量(A法)125ml/100g)
HAF: シースト3(東海カーボン社製/窒素吸着比表面積79m2/g、DBP吸油量(A法)101ml/100g)
樹脂1: ハイロジンS(大社松精油社製/ロジン)
樹脂2: クイントン1920(日本ゼオン社製/ジシクロペンタジエン・スチレン類石油樹脂C4〜5炭化水素共重合体)
樹脂3: クイントンA100(日本ゼオン社製/石油系脂肪族炭化水素樹脂)
樹脂4: ZEOFINE 100M(日本ゼオン社製/芳香族多価カルボン酸・脂肪族多価アルコール縮合物)
樹脂5: 日石ネオポリマー140(新日本石油化学社製/石油系芳香族炭化水素樹脂)
樹脂6: エスクロンV−120(大内新興化学社製/クマロン樹脂)
Brands such as polymers used in the compositions of Table 1 are listed below.
SBR: JSR1500 (manufactured by JSR Corporation / styrene content 23.5% by mass)
BR (1): T0700 (manufactured by JSR Corporation / Neodymium catalyst BR, cocatalyst: methylaluminoxane)
BR (2): BR01 (manufactured by JSR Corporation)
ISAF: Asahi # 80 (Asahi Carbon Co./Nitrogen adsorption specific surface area 115 m2 / g, DBP oil absorption (A method) 113 ml / 100 g)
N234: Seast 7HM (manufactured by Tokai Carbon Co./Nitrogen adsorption specific surface area 126 m2 / g, DBP oil absorption (Method A) 125 ml / 100 g)
HAF: Seast 3 (Tokai Carbon Co./Nitrogen adsorption specific surface area 79m2 / g, DBP oil absorption (A method) 101ml / 100g)
Resin 1: Hyrosin S (manufactured by Taisha Matsuse Oil Co., Ltd./Rosin)
Resin 2: Quinton 1920 (Zeon Corporation / dicyclopentadiene / styrene petroleum resin C4-5 hydrocarbon copolymer)
Resin 3: Quinton A100 (manufactured by Zeon Corporation / petroleum aliphatic hydrocarbon resin)
Resin 4: ZEOFINE 100M (manufactured by Nippon Zeon Co., Ltd./aromatic polycarboxylic acid / aliphatic polyhydric alcohol condensate)
Resin 5: Nisseki Neopolymer 140 (manufactured by Nippon Petrochemical Co., Ltd./petroleum aromatic hydrocarbon resin)
Resin 6: Escron V-120 (Ouchi Shinsei Chemical Co., Ltd./Coumaron Resin)

第1表より明らかなごとく、実施例1〜12のゴム組成物は、スチレン−ブタジエンゴム90〜60質量部とし、ブタジエンゴム及び/又は天然ゴムを含有してなるゴム成分に対し、特定量の特定のカーボンブラック及び特定量の樹脂を配合することにより比較例1〜2と比較して、耐摩耗性と耐カット性(耐衝撃性)の両立を達成し得た。また、HAFを用いた比較例3、樹脂を用いなかった比較例4と比較し、耐カット性の点で大幅に改良された。さらに、Nd−BRを用いることにより、より高度な両立をなし得た。   As is clear from Table 1, the rubber compositions of Examples 1 to 12 were 90 to 60 parts by mass of styrene-butadiene rubber, and a specific amount of the rubber component containing butadiene rubber and / or natural rubber. Compared with Comparative Examples 1-2 by blending a specific carbon black and a specific amount of resin, it was possible to achieve both wear resistance and cut resistance (impact resistance). Further, compared with Comparative Example 3 using HAF and Comparative Example 4 using no resin, the cutting resistance was greatly improved. Furthermore, by using Nd-BR, a higher degree of compatibility could be achieved.

本発明のコンベアベルト用ゴム組成物、その組成物を用いたコンベアベルトカバー用ゴム及びコンベアベルトは、耐摩耗性と耐カット性(耐衝撃性)の両立を達成したので、コンベアベルト等に好適に用いられる。

The rubber composition for conveyor belt of the present invention, the rubber for conveyor belt cover and the conveyor belt using the composition have achieved both wear resistance and cut resistance (impact resistance), and are suitable for conveyor belts and the like. Used for.

Claims (4)

(A)スチレン−ブタジエンゴム90〜60質量部、並びにブタジエンゴム及び/又は天然ゴム10〜40質量部を含むゴム成分100質量部に対して、(B)窒素吸着比表面積100m2/g以上のカーボンブラックを50〜70質量部、及び(C)樹脂を10〜30質量部を含有してなるコンベアベルト用ゴム組成物。 (A) 90 parts by mass of styrene-butadiene rubber and 100 parts by mass of a rubber component containing 10 to 40 parts by mass of butadiene rubber and / or natural rubber, (B) a nitrogen adsorption specific surface area of 100 m 2 / g or more A rubber composition for conveyor belts comprising 50 to 70 parts by mass of carbon black and 10 to 30 parts by mass of (C) resin. 前記ポリブタジエンゴムがネオジウム系触媒により重合されたものであることを特徴とする請求項1記載のコンベアベルト用ゴム組成物。   The rubber composition for a conveyor belt according to claim 1, wherein the polybutadiene rubber is polymerized by a neodymium catalyst. 請求項1又は2記載のゴム組成物を用いることを特徴とするコンベアベルトカバー用ゴム。   A rubber for a conveyor belt cover, wherein the rubber composition according to claim 1 or 2 is used. 請求項1又は2記載のゴム組成物を用いることを特徴とするコンベアベルト。



A conveyor belt using the rubber composition according to claim 1.



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WO2014171419A1 (en) * 2013-04-19 2014-10-23 株式会社ブリヂストン Rubber composition for conveyor belt, and rubber for conveyor belt cover and conveyor belt in which composition is used
WO2016072134A1 (en) * 2014-11-05 2016-05-12 横浜ゴム株式会社 Rubber composition for conveyor belts, and conveyor belt using same
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